[ { "path": ".clang-format", "content": "Standard: Cpp03\nUseTab: ForIndentation\nTabWidth: 4\nIndentWidth: 4\nAccessModifierOffset: -4\nBreakBeforeBraces: Allman\nIndentCaseLabels: false\nColumnLimit: 0\nPointerAlignment: Left\nBreakConstructorInitializersBeforeComma: true\nNamespaceIndentation: None\nAlignEscapedNewlines: DontAlign\nAlignAfterOpenBracket: DontAlign\nIndentExternBlock: NoIndent\nMacros: [MESHOPTIMIZER_ALLOC_CALLCONV=&_&]\n" }, { "path": ".editorconfig", "content": "# See https://editorconfig.org/ for more info\n\n[*]\ncharset = utf-8\nindent_style = tab\nindent_size = 4\ntrim_trailing_whitespace = true\ninsert_final_newline = true\n" }, { "path": ".git-blame-ignore-revs", "content": "# This file contains a list of Git commit hashes that should be hidden from the\n# regular Git history. Typically, this includes commits involving mass auto-formatting\n# or other normalizations. Commit hashes *must* use the full 40-character notation.\n# To apply the ignore list in your local Git client, you must run:\n#\n# git config blame.ignoreRevsFile .git-blame-ignore-revs\n#\n# This file is automatically used by GitHub.com's blame view.\n\n# Convert CRLF to LF everywhere\nbb4aa0e1372751b74425e77c9a42f972971568bf\n\n# js: Reformat all sources with Prettier\n3dea31b5c248594a62f49a3e41fc88d7ceae2de3\n\n# Reformat workflow YAML files with Prettier\n52e8e1f61712928a36b5257a894bb098a4a98b22\n" }, { "path": ".github/ISSUE_TEMPLATE/bug_report.md", "content": "---\nname: Bug report\nabout: Create a report if you've found a bug in this project; please use GitHub Discussions instead if you are uncertain or the bug may be in your code.\ntitle: ''\nlabels: bug\nassignees: ''\n\n---\n" }, { "path": ".github/ISSUE_TEMPLATE/config.yml", "content": "blank_issues_enabled: false\ncontact_links:\n - name: Questions and ideas\n url: https://github.com/zeux/meshoptimizer/discussions\n about: Please use GitHub Discussions if you have questions or ideas to discuss.\n" }, { "path": ".github/ISSUE_TEMPLATE/feature_request.md", "content": "---\nname: Feature request\nabout: Suggest a feature for this project; please use GitHub Discussions if your idea is not sufficiently concrete.\ntitle: ''\nlabels: enhancement\nassignees: ''\n\n---\n" }, { "path": ".github/codecov.yml", "content": "comment: false\n\ncoverage:\n status:\n project: off\n patch: off\n\nignore:\n - demo\n - extern\n - tools\n" }, { "path": ".github/workflows/build.yml", "content": "name: build\n\non:\n push:\n branches:\n - 'master'\n paths-ignore:\n - '*.md'\n pull_request:\n paths-ignore:\n - '*.md'\n\njobs:\n unix:\n strategy:\n matrix:\n os:\n [\n { name: ubuntu, version: ubuntu-latest },\n { name: ubuntu-arm, version: ubuntu-24.04-arm },\n { name: ubuntu-clang, version: ubuntu-latest },\n { name: macos, version: macos-latest },\n ]\n name: ${{matrix.os.name}}\n runs-on: ${{matrix.os.version}}\n env:\n werror: 1\n steps:\n - uses: actions/checkout@v4\n - name: work around ASLR+ASAN compatibility\n run: sudo sysctl -w vm.mmap_rnd_bits=28\n if: matrix.os.name == 'ubuntu'\n - name: enable clang\n run: echo CXX=clang++ >Makefile.config\n if: matrix.os.name == 'ubuntu-clang'\n - name: make test\n run: |\n make -j2 config=sanitize test\n make -j2 config=debug test\n make -j2 config=release test\n make -j2 config=coverage test\n make -j2 config=coverage-scalar test\n - name: make gltfpack\n run: make -j2 config=release gltfpack\n - name: upload coverage\n run: |\n find . -type f -name '*.gcno' -exec gcov -p {} +\n sed -i -e \"s/#####\\(.*\\)\\(\\/\\/ unreachable.*\\)/ -\\1\\2/\" *.gcov\n bash <(curl -s https://codecov.io/bash) -f './src*.gcov' -X search -t ${{secrets.CODECOV_TOKEN}} -B ${{github.ref}}\n if: matrix.os.name != 'ubuntu-clang'\n\n windows:\n strategy:\n matrix:\n arch:\n [\n { name: windows, runner: windows-latest, arch: x64 },\n { name: windows-x86, runner: windows-latest, arch: Win32 },\n { name: windows-arm, runner: windows-11-arm, arch: ARM64 },\n ]\n name: ${{matrix.arch.name}}\n runs-on: ${{matrix.arch.runner}}\n steps:\n - uses: actions/checkout@v4\n - name: cmake configure\n run: cmake . -DMESHOPT_BUILD_DEMO=ON -DMESHOPT_BUILD_GLTFPACK=ON -DMESHOPT_WERROR=ON -DCMAKE_MSVC_RUNTIME_LIBRARY=\"MultiThreaded$<$:Debug>\" -A ${{matrix.arch.arch}}\n - name: cmake test\n shell: bash # necessary for fail-fast\n run: |\n cmake --build . -- -property:Configuration=Debug -verbosity:minimal\n Debug/meshoptdemo.exe demo/pirate.obj\n cmake --build . -- -property:Configuration=Release -verbosity:minimal\n Release/meshoptdemo.exe demo/pirate.obj\n\n nodejs:\n runs-on: ubuntu-latest\n steps:\n - uses: actions/checkout@v4\n - uses: actions/setup-node@v4\n with:\n node-version: '16'\n - name: test decoder\n run: node js/meshopt_decoder.test.js\n - name: test simd decoder\n run: node --experimental-wasm-simd js/meshopt_decoder.test.js\n - name: test encoder\n run: node js/meshopt_encoder.test.js\n - name: test simplifier\n run: node js/meshopt_simplifier.test.js\n - name: test clusterizer\n run: node js/meshopt_clusterizer.test.js\n - name: check es5\n run: |\n npm install -g es-check@7.2.1\n npx es-check --module es5 js/meshopt_decoder.mjs js/meshopt_encoder.js js/meshopt_simplifier.js js/meshopt_clusterizer.js\n npx es-check --module es2020 gltf/library.js\n\n gltfpack:\n runs-on: ubuntu-latest\n steps:\n - uses: actions/checkout@v4\n - uses: actions/checkout@v4\n with:\n repository: KhronosGroup/glTF-Sample-Assets\n path: glTF-Sample-Assets\n - name: work around ASLR+ASAN compatibility\n run: sudo sysctl -w vm.mmap_rnd_bits=28\n - name: make\n run: make -j2 config=sanitize gltfpack\n - name: test\n run: find glTF-Sample-Assets -name '*.gltf' -or -name '*.glb' | xargs -P 2 -L 16 -d '\\n' ./gltfpack -cc -test\n - name: pack\n run: find glTF-Sample-Assets -name '*.gltf' | grep -v '\\-Draco/' | xargs -P 2 -L 16 -d '\\n' -I '{}' ./gltfpack -i '{}' -o '{}pack.gltf'\n - name: validate\n run: |\n curl -sL $VALIDATOR | tar xJ\n find glTF-Sample-Assets -name '*.gltfpack.gltf' | xargs -P 2 -L 1 -d '\\n' ./gltf_validator -r -a\n env:\n VALIDATOR: https://github.com/KhronosGroup/glTF-Validator/releases/download/2.0.0-dev.3.10/gltf_validator-2.0.0-dev.3.10-linux64.tar.xz\n\n gltfpack-js:\n runs-on: ubuntu-latest\n steps:\n - uses: actions/checkout@v4\n - uses: actions/setup-node@v4\n with:\n node-version: '18'\n - name: install wasi\n run: |\n curl -sL https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-$VERSION/wasi-sdk-$VERSION.0-x86_64-linux.deb > wasi-sdk.deb\n sudo dpkg -i wasi-sdk.deb\n env:\n VERSION: 25\n - name: build\n run: |\n make -j2 -B gltf/library.wasm js\n git status\n - name: test\n run: |\n node gltf/cli.js -i demo/pirate.obj -o pirate.glb -v\n node gltf/cli.js -i `pwd`/pirate.glb -o pirate-repack.glb -cc -v\n wc -c pirate.glb pirate-repack.glb\n node js/meshopt_decoder.test.js\n node js/meshopt_encoder.test.js\n node js/meshopt_simplifier.test.js\n node js/meshopt_clusterizer.test.js\n\n gltfpack-full:\n runs-on: ubuntu-latest\n steps:\n - uses: actions/checkout@v4\n - uses: actions/checkout@v4\n with:\n repository: zeux/basis_universal\n ref: gltfpack\n path: basis_universal\n - uses: actions/checkout@v4\n with:\n repository: webmproject/libwebp\n ref: 1.6.0\n path: libwebp\n - name: cmake configure\n run: cmake . -DMESHOPT_BUILD_GLTFPACK=ON -DMESHOPT_GLTFPACK_BASISU_PATH=basis_universal -DMESHOPT_GLTFPACK_LIBWEBP_PATH=libwebp\n - name: cmake build\n run: cmake --build . --target gltfpack -j 4\n\n gltfpack-coverage:\n runs-on: ubuntu-latest\n steps:\n - uses: actions/checkout@v4\n - uses: actions/checkout@v4\n with:\n repository: zeux/basis_universal\n ref: gltfpack\n path: basis_universal\n - uses: actions/checkout@v4\n with:\n repository: KhronosGroup/glTF-Sample-Assets\n path: glTF-Sample-Assets\n - name: build basisu\n run: |\n cd basis_universal\n cmake . -D CMAKE_BUILD_TYPE=Debug\n make -j4 basisu_encoder\n - name: make\n run: make -j2 config=coverage BASISU=basis_universal gltfpack\n - name: test\n run: |\n find glTF-Sample-Assets -name '*.gltf' -or -name '*.glb' | xargs -P 2 -L 16 -d '\\n' ./gltfpack -cc -test\n ./gltfpack -test demo/pirate.obj -si 0.5\n ./gltfpack -test demo/pirate.obj -si 0.5 -slb -se 0.02\n ./gltfpack -test demo/pirate.obj -si 0.1 -sa\n ./gltfpack -test demo/pirate.obj -noq\n ./gltfpack -test demo/pirate.obj -vp 16 -vt 16 -vn 16 -vc 16\n ./gltfpack -test demo/pirate.obj -vpf -vtf -vnf\n ./gltfpack -test demo/pirate.obj -vi -c\n ./gltfpack -test glTF-Sample-Assets/Models/ABeautifulGame/glTF/ABeautifulGame.gltf -mi -c\n ./gltfpack -test glTF-Sample-Assets/Models/ABeautifulGame/glTF/ABeautifulGame.gltf -kn -km -ke\n ./gltfpack -test glTF-Sample-Assets/Models/ABeautifulGame/glTF/ABeautifulGame.gltf -si 0.1 -sp\n ./gltfpack -test glTF-Sample-Assets/Models/BoxTextured/glTF/BoxTextured.gltf -vpf -vtf -c\n ./gltfpack -test glTF-Sample-Assets/Models/BoxTextured/glTF/BoxTextured.gltf -vpf -vtf -cc\n ./gltfpack -test glTF-Sample-Assets/Models/BoxTextured/glTF/BoxTextured.gltf -tc\n ./gltfpack -test glTF-Sample-Assets/Models/BoxTextured/glTF/BoxTextured.gltf -tc -tq color 10 -tu normal,attrib -ts attrib 0.5 -tl color 512\n ./gltfpack -test glTF-Sample-Assets/Models/BoxTextured/glTF/BoxTextured.gltf -tr\n ./gltfpack -test glTF-Sample-Assets/Models/BoxTextured/glTF/BoxTextured.gltf -tc -ts 0.5 -tl 64\n ./gltfpack -test glTF-Sample-Assets/Models/BoxTextured/glTF/BoxTextured.gltf -tc color -tfy -tq 4 -tj 1\n ./gltfpack -test glTF-Sample-Assets/Models/CesiumMan/glTF/CesiumMan.gltf -tu -ts 0.6 -tp -ar 0\n ./gltfpack -test glTF-Sample-Assets/Models/PrimitiveModeNormalsTest/glTF/PrimitiveModeNormalsTest.gltf -si 0.5\n ./gltfpack -test glTF-Sample-Assets/Models/VertexColorTest/glTF/VertexColorTest.gltf -si 0.5 -vc 12\n ./gltfpack -test glTF-Sample-Assets/Models/SimpleMeshes/glTF/SimpleMeshes.gltf -mm\n ./gltfpack -test glTF-Sample-Assets/Models/SimpleMeshes/glTF/SimpleMeshes.gltf -kn\n echo newmtl Leather > demo/pirate.mtl\n echo map_Kd leather.jpg >> demo/pirate.mtl\n echo map_d leather.jpg >> demo/pirate.mtl\n ./gltfpack -test demo/pirate.obj\n - name: test output\n run: |\n ./gltfpack || true\n ./gltfpack -h || true\n ./gltfpack -i glTF-Sample-Assets/Models/BoxTextured/glTF/BoxTextured.gltf -o box.glb -vv -r box.json\n ./gltfpack -i glTF-Sample-Assets/Models/BoxTextured/glTF/BoxTextured.gltf -o box.gltf -cf\n - name: upload coverage\n run: |\n find . -type f -name '*.gcno' -exec gcov -p {} +\n sed -i -e \"s/#####\\(.*\\)\\(\\/\\/ unreachable.*\\)/ -\\1\\2/\" *.gcov\n bash <(curl -s https://codecov.io/bash) -f './gltf*.gcov' -X search -t ${{secrets.CODECOV_TOKEN}} -B ${{github.ref}}\n\n macos-iphone:\n runs-on: macos-14\n steps:\n - uses: actions/checkout@v4\n - name: make\n run: make -j2 config=iphone\n" }, { "path": ".github/workflows/cifuzz.yml", "content": "name: CIFuzz\n\non:\n push:\n branches:\n - 'master'\n paths-ignore:\n - '*.md'\n\njobs:\n Fuzzing:\n runs-on: ubuntu-latest\n steps:\n - name: Build Fuzzers\n id: build\n uses: google/oss-fuzz/infra/cifuzz/actions/build_fuzzers@master\n with:\n oss-fuzz-project-name: 'meshoptimizer'\n dry-run: false\n language: c++\n - name: Run Fuzzers\n uses: google/oss-fuzz/infra/cifuzz/actions/run_fuzzers@master\n with:\n oss-fuzz-project-name: 'meshoptimizer'\n fuzz-seconds: 30\n dry-run: false\n language: c++\n - name: Upload Crash\n uses: actions/upload-artifact@v4\n if: failure() && steps.build.outcome == 'success'\n with:\n name: artifacts\n path: ./out/artifacts\n" }, { "path": ".github/workflows/release.yml", "content": "name: release\n\non:\n push:\n branches:\n - 'master'\n paths-ignore:\n - '*.md'\n\njobs:\n gltfpack:\n strategy:\n matrix:\n os:\n [\n { name: windows, version: windows-latest },\n { name: ubuntu, version: ubuntu-22.04 },\n { name: macos, version: macos-14 },\n { name: macos-intel, version: macos-14 },\n ]\n name: gltfpack-${{matrix.os.name}}\n runs-on: ${{matrix.os.version}}\n steps:\n - uses: actions/checkout@v4\n - uses: actions/checkout@v4\n with:\n repository: zeux/basis_universal\n ref: gltfpack\n path: basis_universal\n - uses: actions/checkout@v4\n with:\n repository: webmproject/libwebp\n ref: 1.6.0\n path: libwebp\n - name: cmake configure\n run: cmake . -DMESHOPT_BUILD_GLTFPACK=ON -DMESHOPT_GLTFPACK_BASISU_PATH=basis_universal -D MESHOPT_GLTFPACK_LIBWEBP_PATH=libwebp -DCMAKE_MSVC_RUNTIME_LIBRARY=\"MultiThreaded\" -DCMAKE_BUILD_TYPE=Release\n - name: cmake configure x64\n run: cmake . -DSSE=ON\n if: matrix.os.name == 'ubuntu'\n - name: cmake configure mac-x64\n run: cmake . -DSSE=ON -DCMAKE_OSX_ARCHITECTURES=x86_64\n if: matrix.os.name == 'macos-intel'\n - name: cmake build\n run: cmake --build . --target gltfpack --config Release -j 3\n - uses: actions/upload-artifact@v4\n with:\n name: gltfpack-windows\n path: Release/gltfpack.exe\n if: matrix.os.name == 'windows'\n - uses: actions/upload-artifact@v4\n with:\n name: gltfpack-${{matrix.os.name}}\n path: gltfpack\n if: matrix.os.name != 'windows'\n\n nodejs:\n runs-on: ubuntu-latest\n steps:\n - uses: actions/checkout@v4\n - uses: actions/setup-node@v4\n with:\n node-version: '18'\n - name: install wasi\n run: |\n curl -sL https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-$VERSION/wasi-sdk-$VERSION.0-x86_64-linux.deb > wasi-sdk.deb\n sudo dpkg -i wasi-sdk.deb\n env:\n VERSION: 25\n - name: build\n run: |\n make -j2 -B gltf/library.wasm js\n git status\n - name: npm pack\n run: |\n cp LICENSE.md gltf/\n cp LICENSE.md js/\n cd gltf && npm pack && cd ..\n cd js && npm pack && cd ..\n - uses: actions/upload-artifact@v4\n with:\n name: gltfpack-npm\n path: gltf/gltfpack-*.tgz\n - uses: actions/upload-artifact@v4\n with:\n name: meshoptimizer-npm\n path: js/meshoptimizer-*.tgz\n" }, { "path": ".gitignore", "content": "# IDE integrations\n/.cache/\n/.idea/\n/.vs/\n/.vscode/\n/.zed/\n\n# Build files\n/build/\n/cmake*/\n/out/\n/*.dSYM/\n/gltf/library.wasm\ncompile_commands.json\n\n# Test files\n/data/\n/*.log\n/perf.data*\n" }, { "path": ".prettierrc", "content": "{\n\t\"useTabs\": true,\n\t\"tabWidth\": 4,\n\t\"semi\": true,\n\t\"singleQuote\": true,\n\t\"printWidth\": 150,\n\t\"trailingComma\": \"es5\",\n\t\"overrides\": [\n\t\t{\n\t\t\t\"files\": \"*.yml\",\n\t\t\t\"options\": {\n\t\t\t\t\"tabWidth\": 2\n\t\t\t}\n\t\t},\n\t]\n}\n" }, { "path": "CMakeLists.txt", "content": "cmake_minimum_required(VERSION 3.5...3.30)\n\nif(POLICY CMP0077)\n cmake_policy(SET CMP0077 NEW) # Enables override of options from parent CMakeLists.txt\nendif()\n\nif(POLICY CMP0091)\n cmake_policy(SET CMP0091 NEW) # Enables use of MSVC_RUNTIME_LIBRARY\nendif()\n\nif(POLICY CMP0092)\n cmake_policy(SET CMP0092 NEW) # Enables clean /W4 override for MSVC\nendif()\n\nproject(meshoptimizer VERSION 1.0 LANGUAGES CXX)\n\noption(MESHOPT_BUILD_DEMO \"Build demo\" OFF)\noption(MESHOPT_BUILD_GLTFPACK \"Build gltfpack\" OFF)\noption(MESHOPT_BUILD_SHARED_LIBS \"Build shared libraries\" OFF)\noption(MESHOPT_STABLE_EXPORTS \"Only export stable APIs from shared library\" OFF)\noption(MESHOPT_WERROR \"Treat warnings as errors\" OFF)\noption(MESHOPT_INSTALL \"Install library\" ON)\n\n# Optional gltfpack components for texture compression support\nset(MESHOPT_GLTFPACK_BASISU_PATH \"\" CACHE STRING \"\") # Basis Universal, https://github.com/BinomialLLC/basis_universal\nset(MESHOPT_GLTFPACK_LIBWEBP_PATH \"\" CACHE STRING \"\") # libwebp, https://github.com/webmproject/libwebp\n\nset(SOURCES\n src/meshoptimizer.h\n src/allocator.cpp\n src/clusterizer.cpp\n src/indexanalyzer.cpp\n src/indexcodec.cpp\n src/indexgenerator.cpp\n src/meshletcodec.cpp\n src/meshletutils.cpp\n src/opacitymap.cpp\n src/overdrawoptimizer.cpp\n src/partition.cpp\n src/quantization.cpp\n src/rasterizer.cpp\n src/simplifier.cpp\n src/spatialorder.cpp\n src/stripifier.cpp\n src/vcacheoptimizer.cpp\n src/vertexcodec.cpp\n src/vertexfilter.cpp\n src/vfetchoptimizer.cpp\n)\n\nset(GLTF_SOURCES\n gltf/animation.cpp\n gltf/encodebasis.cpp\n gltf/encodewebp.cpp\n gltf/fileio.cpp\n gltf/gltfpack.cpp\n gltf/image.cpp\n gltf/json.cpp\n gltf/material.cpp\n gltf/mesh.cpp\n gltf/node.cpp\n gltf/parseobj.cpp\n gltf/parselib.cpp\n gltf/parsegltf.cpp\n gltf/stream.cpp\n gltf/write.cpp\n)\n\nif(WIN32)\n list(APPEND GLTF_SOURCES gltf/gltfpack.manifest)\nendif()\n\nif(MSVC)\n add_compile_options(/W4)\nelse()\n add_compile_options(-Wall -Wextra -Wshadow -Wno-missing-field-initializers)\nendif()\n\nif(MESHOPT_WERROR)\n if(MSVC)\n add_compile_options(/WX)\n else()\n add_compile_options(-Werror)\n endif()\nendif()\n\nif(MESHOPT_BUILD_SHARED_LIBS)\n add_library(meshoptimizer SHARED ${SOURCES})\nelse()\n add_library(meshoptimizer STATIC ${SOURCES})\nendif()\n\ntarget_include_directories(meshoptimizer INTERFACE \"$\")\n\nif(MESHOPT_BUILD_SHARED_LIBS)\n set_target_properties(meshoptimizer PROPERTIES CXX_VISIBILITY_PRESET hidden)\n set_target_properties(meshoptimizer PROPERTIES VISIBILITY_INLINES_HIDDEN ON)\n\n # soversion may be requested via -DMESHOPT_SOVERSION=n; note that experimental APIs (marked with MESHOPTIMIZER_EXPERIMENTAL) are not ABI-stable\n if(MESHOPT_SOVERSION)\n set_target_properties(meshoptimizer PROPERTIES VERSION ${PROJECT_VERSION} SOVERSION ${MESHOPT_SOVERSION})\n endif()\n\n if(WIN32)\n target_compile_definitions(meshoptimizer INTERFACE \"MESHOPTIMIZER_API=__declspec(dllimport)\")\n target_compile_definitions(meshoptimizer PRIVATE \"MESHOPTIMIZER_API=__declspec(dllexport)\")\n else()\n target_compile_definitions(meshoptimizer PUBLIC \"MESHOPTIMIZER_API=__attribute__((visibility(\\\"default\\\")))\")\n endif()\n\n target_compile_definitions(meshoptimizer PUBLIC MESHOPTIMIZER_ALLOC_EXPORT)\n\n if(MESHOPT_STABLE_EXPORTS)\n\t\ttarget_compile_definitions(meshoptimizer PUBLIC \"MESHOPTIMIZER_EXPERIMENTAL=\")\n endif()\nendif()\n\nif(MESHOPT_BUILD_DEMO)\n add_executable(demo demo/main.cpp demo/nanite.cpp demo/tests.cpp tools/objloader.cpp)\n set_target_properties(demo PROPERTIES CXX_STANDARD 11)\n set_target_properties(demo PROPERTIES OUTPUT_NAME meshoptdemo)\n target_link_libraries(demo meshoptimizer)\nendif()\n\nif(MESHOPT_BUILD_GLTFPACK)\n add_executable(gltfpack ${GLTF_SOURCES})\n set_target_properties(gltfpack PROPERTIES CXX_STANDARD 11)\n target_link_libraries(gltfpack meshoptimizer)\n\n if(MESHOPT_BUILD_SHARED_LIBS)\n string(CONCAT RPATH \"$ORIGIN/../\" ${CMAKE_INSTALL_LIBDIR})\n set_target_properties(gltfpack PROPERTIES INSTALL_RPATH ${RPATH})\n endif()\n\n if(NOT MESHOPT_GLTFPACK_BASISU_PATH STREQUAL \"\")\n get_filename_component(BASISU_PATH ${MESHOPT_GLTFPACK_BASISU_PATH} ABSOLUTE)\n if (NOT EXISTS ${BASISU_PATH})\n message(FATAL_ERROR \"Basis Universal path ${BASISU_PATH} not found\")\n endif()\n\n if (NOT SSE AND NOT MSVC AND CMAKE_SYSTEM_PROCESSOR STREQUAL \"x86_64\")\n message(WARNING \"Building Basis Universal without SSE4.1 support; performance may be suboptimal\")\n endif()\n\n add_subdirectory(${BASISU_PATH} ${CMAKE_CURRENT_BINARY_DIR}/basisu EXCLUDE_FROM_ALL)\n\n target_compile_definitions(gltfpack PRIVATE WITH_BASISU)\n target_link_libraries(gltfpack basisu_encoder)\n set_source_files_properties(gltf/encodebasis.cpp PROPERTIES INCLUDE_DIRECTORIES ${BASISU_PATH}) # necessary because basisu_encoder doesn't export include directories\n endif()\n\n if(NOT MESHOPT_GLTFPACK_LIBWEBP_PATH STREQUAL \"\")\n get_filename_component(LIBWEBP_PATH ${MESHOPT_GLTFPACK_LIBWEBP_PATH} ABSOLUTE)\n if (NOT EXISTS ${LIBWEBP_PATH})\n message(FATAL_ERROR \"libwebp path ${LIBWEBP_PATH} not found\")\n endif()\n\n add_subdirectory(${LIBWEBP_PATH} ${CMAKE_CURRENT_BINARY_DIR}/libwebp EXCLUDE_FROM_ALL)\n\n target_compile_definitions(gltfpack PRIVATE WITH_LIBWEBP)\n target_link_libraries(gltfpack webp)\n\n # when gltfpack is built with Basis Universal, we use Basis image decoders for PNG/JPEG support for ease of distribution\n if(NOT MESHOPT_GLTFPACK_BASISU_PATH STREQUAL \"\")\n target_compile_definitions(gltfpack PRIVATE WITH_LIBWEBP_BASIS)\n else()\n target_link_libraries(gltfpack imagedec)\n endif()\n endif()\n\n if(NOT MESHOPT_GLTFPACK_BASISU_PATH STREQUAL \"\" OR NOT MESHOPT_GLTFPACK_LIBWEBP_PATH STREQUAL \"\")\n find_package(Threads REQUIRED)\n target_link_libraries(gltfpack Threads::Threads)\n endif()\nendif()\n\nif(MESHOPT_INSTALL)\n\tinclude(GNUInstallDirs)\n\n\tinstall(TARGETS meshoptimizer EXPORT meshoptimizerTargets\n\t COMPONENT meshoptimizer\n\t RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}\n\t LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}\n\t ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}\n\t INCLUDES DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})\n\n\tif(MESHOPT_BUILD_GLTFPACK)\n\t install(TARGETS gltfpack RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})\n\tendif()\n\n\tinstall(FILES src/meshoptimizer.h COMPONENT meshoptimizer DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})\n\tinstall(EXPORT meshoptimizerTargets COMPONENT meshoptimizer DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/meshoptimizer NAMESPACE meshoptimizer::)\n\n\tif(MSVC)\n\t\tset(PDB_TARGETS meshoptimizer)\n\t\tif(MESHOPT_BUILD_GLTFPACK)\n\t\t list(APPEND PDB_TARGETS gltfpack)\n\t\tendif()\n\n\t foreach(TARGET ${PDB_TARGETS})\n\t get_target_property(TARGET_TYPE ${TARGET} TYPE)\n\t if(NOT ${TARGET_TYPE} STREQUAL \"STATIC_LIBRARY\")\n\t install(FILES $ COMPONENT meshoptimizer DESTINATION ${CMAKE_INSTALL_BINDIR} OPTIONAL)\n\t endif()\n\t endforeach(TARGET)\n\tendif()\n\n\tinclude(CMakePackageConfigHelpers)\n\n\t# CMake 3.18+ supports file(CONFIGURE OUTPUT file CONTENT content @ONLY) but we only require 3.5+\n\tfile(WRITE ${CMAKE_CURRENT_BINARY_DIR}/meshoptimizerConfig.cmake\n\t\t\"include(\\\"\\${CMAKE_CURRENT_LIST_DIR}/meshoptimizerTargets.cmake\\\")\\n\")\n\n\twrite_basic_package_version_file(${CMAKE_CURRENT_BINARY_DIR}/meshoptimizerConfigVersion.cmake COMPATIBILITY ExactVersion)\n\n\tinstall(FILES\n\t ${CMAKE_CURRENT_BINARY_DIR}/meshoptimizerConfig.cmake\n\t ${CMAKE_CURRENT_BINARY_DIR}/meshoptimizerConfigVersion.cmake\n\t COMPONENT meshoptimizer\n\t DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/meshoptimizer)\nendif()\n" }, { "path": "CONTRIBUTING.md", "content": "Thanks for deciding to contribute to meshoptimizer! These guidelines will try to help make the process painless and efficient.\n\n## Questions\n\nIf you have a question regarding the library usage, please [open a GitHub issue](https://github.com/zeux/meshoptimizer/issues/new).\nSome questions just need answers, but it's nice to keep them for future reference in case other people want to know the same thing.\nSome questions help improve the library interface or documentation by inspiring future changes.\n\n## Bugs\n\nIf the library doesn't compile on your system, compiles with warnings, doesn't seem to run correctly for your input data or if anything else is amiss, please [open a GitHub issue](https://github.com/zeux/meshoptimizer/issues/new).\nIt helps if you note the version of the library this issue happens in, the version of your compiler for compilation issues, and a reproduction case for runtime bugs.\n\nOf course, feel free to [create a pull request](https://help.github.com/articles/about-pull-requests/) to fix the bug yourself.\n\n## Features\n\nNew algorithms and improvements to existing algorithms are always welcome; you can open an issue or make the change yourself and submit a pull request.\n\nFor major features, consider opening an issue describing an improvement you'd like to see or make before opening a pull request.\nThis will give us a chance to discuss the idea before implementing it - some algorithms may not be easy to integrate into existing programs, may not be robust to arbitrary meshes or may be expensive to run or implement/maintain, so a discussion helps make sure these don't block the algorithm development.\n\n## Code style\n\nContributions to this project are expected to follow the existing code style.\n`.clang-format` file mostly defines syntactic styling rules (you can run `make format` to format the code accordingly).\n\nAs for naming conventions, this library uses `snake_case` for variables, `lowerCamelCase` for functions, `UpperCamelCase` for types, `kCamelCase` for global constants and `SCARY_CASE` for macros. All public functions/types must additionally have an extra `meshopt_` prefix to avoid symbol conflicts.\n\n## Dependencies\n\nPlease note that this library uses C89 interface for all APIs and a C++98 implementation - C++11 features can not be used.\nThis choice is made to maximize compatibility to make sure that any toolchain, including legacy proprietary gaming console toolchains, can compile this code.\n\nAdditionally, the library code has zero external dependencies, does not depend on STL and does not use RTTI or exceptions.\nThis, again, maximizes compatibility and makes sure the library can be used in environments where STL use is discouraged or prohibited, as well as maximizing runtime performance and minimizing compilation times.\n\nThe demo program uses STL since it serves as an example of usage and as a test harness, not as production-ready code.\n\n## Testing\n\nAll pull requests will run through a continuous integration pipeline using GitHub Actions that will run the built-in unit tests and integration tests on Windows, macOS and Linux with gcc, clang and msvc compilers.\nYou can run the tests yourself using `make test` or building the demo program with `cmake -DBUILD_DEMO=ON` and running it.\n\nUnit tests can be found in `demo/tests.cpp` and functional tests - in `demo/main.cpp`; when making code changes please try to make sure they are covered by an existing test or add a new test accordingly.\n\n## Documentation\n\nDocumentation for this library resides in the `meshoptimizer.h` header, with examples as part of a usage manual available in `README.md`.\nChanges to documentation are always welcome and should use issues/pull requests as outlined above; please note that `README.md` only contains documentation for stable algorithms, as experimental algorithms may change the interface without concern for backwards compatibility.\n\n## Sensitive communication\n\nIf you prefer to not disclose the issues or information relevant to the issue such as reproduction case to the public, you can always contact the author via e-mail (arseny.kapoulkine@gmail.com).\n\n## Contributor agreement\n\nAny code you submit will become part of the repository and be distributed under the [meshoptimizer license](https://github.com/zeux/meshoptimizer/blob/master/LICENSE.md). By submitting code to the project you agree that the code is your work and that you can give it to the project.\n\nYou also agree by submitting your code that you grant all transferrable rights to the code to the project maintainer, including for example re-licensing the code, modifying the code, and distributing it in source or binary forms. Specifically, this includes a requirement that you assign copyright to the project maintainer.\n" }, { "path": "LICENSE.md", "content": "MIT License\n\nCopyright (c) 2016-2026 Arseny Kapoulkine\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n" }, { "path": "Makefile", "content": "MAKEFLAGS+=-r -j\n\nconfig=debug\nfiles=demo/pirate.obj\n\nBUILD=build/$(config)\n\nLIBRARY_SOURCES=$(wildcard src/*.cpp)\nLIBRARY_OBJECTS=$(LIBRARY_SOURCES:%=$(BUILD)/%.o)\n\nDEMO_SOURCES=$(wildcard demo/*.c demo/*.cpp) tools/objloader.cpp\nDEMO_OBJECTS=$(DEMO_SOURCES:%=$(BUILD)/%.o)\n\nGLTFPACK_SOURCES=$(wildcard gltf/*.cpp)\nGLTFPACK_OBJECTS=$(GLTFPACK_SOURCES:%=$(BUILD)/%.o)\n\nOBJECTS=$(LIBRARY_OBJECTS) $(DEMO_OBJECTS) $(GLTFPACK_OBJECTS)\n\nLIBRARY=$(BUILD)/libmeshoptimizer.a\nDEMO=$(BUILD)/meshoptdemo\n\nCFLAGS=-g -Wall -Wextra -std=c89\nCXXFLAGS=-g -Wall -Wextra -Wshadow -Wno-missing-field-initializers\nLDFLAGS=\n\n$(LIBRARY_OBJECTS): CXXFLAGS+=-std=gnu++98\n$(DEMO_OBJECTS): CXXFLAGS+=-std=c++11\n$(GLTFPACK_OBJECTS): CXXFLAGS+=-std=c++11\n\nifdef BASISU\n $(GLTFPACK_OBJECTS): CXXFLAGS+=-DWITH_BASISU\n $(BUILD)/gltf/encodebasis.cpp.o: CXXFLAGS+=-I$(BASISU)\n gltfpack: LDFLAGS+=-lpthread $(BASISU)/libbasisu_encoder.a\nendif\n\nWASI_SDK?=/opt/wasi-sdk\nWASMCC?=$(WASI_SDK)/bin/clang++\nWASIROOT?=$(WASI_SDK)/share/wasi-sysroot\n\nWASM_FLAGS=--target=wasm32-wasi --sysroot=$(WASIROOT)\nWASM_FLAGS+=-Wall -Wextra\nWASM_FLAGS+=-O3 -DNDEBUG -nostartfiles -nostdlib -Wl,--no-entry -Wl,-s\nWASM_FLAGS+=-mcpu=mvp # make sure clang doesn't use post-MVP features like sign extension\nWASM_FLAGS+=-fno-slp-vectorize -fno-vectorize -fno-unroll-loops\nWASM_FLAGS+=-Wl,-z -Wl,stack-size=36864 -Wl,--initial-memory=65536\nWASM_EXPORT_PREFIX=-Wl,--export\n\nWASM_DECODER_SOURCES=src/vertexcodec.cpp src/indexcodec.cpp src/vertexfilter.cpp tools/wasmstubs.cpp\nWASM_DECODER_EXPORTS=meshopt_decodeVertexBuffer meshopt_decodeIndexBuffer meshopt_decodeIndexSequence meshopt_decodeFilterOct meshopt_decodeFilterQuat meshopt_decodeFilterExp meshopt_decodeFilterColor sbrk __wasm_call_ctors\n\nWASM_ENCODER_SOURCES=src/vertexcodec.cpp src/indexcodec.cpp src/vertexfilter.cpp src/vcacheoptimizer.cpp src/vfetchoptimizer.cpp src/spatialorder.cpp tools/wasmstubs.cpp\nWASM_ENCODER_EXPORTS=meshopt_encodeVertexBuffer meshopt_encodeVertexBufferBound meshopt_encodeVertexBufferLevel meshopt_encodeIndexBuffer meshopt_encodeIndexBufferBound meshopt_encodeIndexSequence meshopt_encodeIndexSequenceBound meshopt_encodeVertexVersion meshopt_encodeIndexVersion meshopt_encodeFilterOct meshopt_encodeFilterQuat meshopt_encodeFilterExp meshopt_encodeFilterColor meshopt_optimizeVertexCache meshopt_optimizeVertexCacheStrip meshopt_optimizeVertexFetchRemap meshopt_spatialSortRemap sbrk __wasm_call_ctors\n\nWASM_SIMPLIFIER_SOURCES=src/simplifier.cpp src/vfetchoptimizer.cpp src/indexgenerator.cpp tools/wasmstubs.cpp\nWASM_SIMPLIFIER_EXPORTS=meshopt_simplify meshopt_simplifyWithAttributes meshopt_simplifyWithUpdate meshopt_simplifyScale meshopt_simplifyPoints meshopt_simplifySloppy meshopt_simplifyPrune meshopt_optimizeVertexFetchRemap meshopt_generatePositionRemap sbrk __wasm_call_ctors\n\nWASM_CLUSTERIZER_SOURCES=src/clusterizer.cpp src/meshletutils.cpp tools/wasmstubs.cpp\nWASM_CLUSTERIZER_EXPORTS=meshopt_buildMeshletsBound meshopt_buildMeshletsFlex meshopt_buildMeshletsSpatial meshopt_computeClusterBounds meshopt_computeMeshletBounds meshopt_computeSphereBounds meshopt_optimizeMeshlet sbrk __wasm_call_ctors\n\nifneq ($(werror),)\n\tCFLAGS+=-Werror\n\tCXXFLAGS+=-Werror\nendif\n\nifeq ($(config),iphone)\n\tIPHONESDK=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk\n\tCFLAGS+=-arch armv7 -arch arm64 -isysroot $(IPHONESDK)\n\tCXXFLAGS+=-arch armv7 -arch arm64 -isysroot $(IPHONESDK) -stdlib=libc++\n\tLDFLAGS+=-arch armv7 -arch arm64 -isysroot $(IPHONESDK) -L $(IPHONESDK)/usr/lib -mios-version-min=7.0\nendif\n\nifeq ($(config),trace)\n\tCXXFLAGS+=-DTRACE=1\nendif\n\nifeq ($(config),tracev)\n\tCXXFLAGS+=-DTRACE=2\nendif\n\nifeq ($(config),release)\n\tCXXFLAGS+=-O3 -DNDEBUG\nendif\n\nifeq ($(config),coverage)\n\tCXXFLAGS+=-coverage\n\tLDFLAGS+=-coverage\nendif\n\nifeq ($(config),release-avx)\n\tCXXFLAGS+=-O3 -DNDEBUG -mavx\nendif\n\nifeq ($(config),release-avx512)\n\tCXXFLAGS+=-O3 -DNDEBUG -mavx512vl -mavx512vbmi -mavx512vbmi2\nendif\n\nifeq ($(config),release-scalar)\n\tCXXFLAGS+=-O3 -DNDEBUG -DMESHOPTIMIZER_NO_SIMD\nendif\n\nifeq ($(config),coverage-scalar)\n\tCXXFLAGS+=-coverage -DMESHOPTIMIZER_NO_SIMD\n\tLDFLAGS+=-coverage\nendif\n\nifeq ($(config),sanitize)\n\tCXXFLAGS+=-fsanitize=address,undefined -fsanitize-undefined-trap-on-error\n\tLDFLAGS+=-fsanitize=address,undefined\nendif\n\nifeq ($(config),analyze)\n\tCXXFLAGS+=--analyze\nendif\n\nifeq ($(config),fuzz)\n CXXFLAGS+=-O1 -fsanitize=address,fuzzer\n LDFLAGS+=-fsanitize=address,fuzzer\n\n $(GLTFPACK_OBJECTS): CXXFLAGS+=-DGLTFFUZZ\nendif\n\n-include Makefile.config\n\nall: $(DEMO)\n\ntest: $(DEMO)\n\t$(DEMO) $(files)\n\ncheck: $(DEMO)\n\t$(DEMO)\n\ndev: $(DEMO)\n\t$(DEMO) -d $(files)\n\nnanite: $(DEMO)\n\t$(DEMO) -n $(files)\n\nformat:\n\tclang-format -i src/*.h src/*.cpp demo/*.cpp gltf/*.h gltf/*.cpp\n\nformatjs:\n\tprettier -w js/*.js gltf/*.js demo/*.html js/*.ts\n\njs: js/meshopt_decoder.cjs js/meshopt_decoder.mjs js/meshopt_encoder.js js/meshopt_simplifier.js js/meshopt_clusterizer.js\n\nsymbols: $(BUILD)/amalgamated.so\n\tnm $< -U -g\n\ngltfpack: $(BUILD)/gltfpack\n\tln -fs $^ $@\n\nifeq ($(config),fuzz)\ngltffuzz: $(BUILD)/gltfpack\n\tcp $^ $@\n\tmkdir -p /tmp/gltffuzz\n\tcp gltf/fuzz.glb /tmp/gltffuzz/\n\t./gltffuzz /tmp/gltffuzz -fork=16 -dict=gltf/fuzz.dict -ignore_crashes=1 -max_len=32768\nendif\n\n$(BUILD)/gltfpack: $(GLTFPACK_OBJECTS) $(LIBRARY)\n\t$(CXX) $^ $(LDFLAGS) -o $@\n\ngltfpack.wasm: gltf/library.wasm\n\ngltf/library.wasm: $(LIBRARY_SOURCES) $(GLTFPACK_SOURCES)\n\t$(WASMCC) $^ -o $@ -Wall -Os -DNDEBUG --target=wasm32-wasi --sysroot=$(WASIROOT) -nostartfiles -Wl,--no-entry -Wl,--export=pack -Wl,--export=malloc -Wl,--export=free -Wl,--export=__wasm_call_ctors -Wl,-s -Wl,--allow-undefined-file=gltf/wasistubs.txt\n\nbuild/decoder_base.wasm: $(WASM_DECODER_SOURCES)\n\t@mkdir -p build\n\t$(WASMCC) $^ $(WASM_FLAGS) $(patsubst %,$(WASM_EXPORT_PREFIX)=%,$(WASM_DECODER_EXPORTS)) -o $@\n\nbuild/decoder_simd.wasm: $(WASM_DECODER_SOURCES)\n\t@mkdir -p build\n\t$(WASMCC) $^ $(WASM_FLAGS) $(patsubst %,$(WASM_EXPORT_PREFIX)=%,$(WASM_DECODER_EXPORTS)) -o $@ -msimd128 -mbulk-memory\n\nbuild/encoder.wasm: $(WASM_ENCODER_SOURCES)\n\t@mkdir -p build\n\t$(WASMCC) $^ $(WASM_FLAGS) $(patsubst %,$(WASM_EXPORT_PREFIX)=%,$(WASM_ENCODER_EXPORTS)) -lc -o $@\n\nbuild/simplifier.wasm: $(WASM_SIMPLIFIER_SOURCES)\n\t@mkdir -p build\n\t$(WASMCC) $^ $(WASM_FLAGS) $(patsubst %,$(WASM_EXPORT_PREFIX)=%,$(WASM_SIMPLIFIER_EXPORTS)) -lc -o $@\n\nbuild/clusterizer.wasm: $(WASM_CLUSTERIZER_SOURCES)\n\t@mkdir -p build\n\t$(WASMCC) $^ $(WASM_FLAGS) $(patsubst %,$(WASM_EXPORT_PREFIX)=%,$(WASM_CLUSTERIZER_EXPORTS)) -lc -o $@\n\njs/meshopt_decoder.mjs: build/decoder_base.wasm build/decoder_simd.wasm tools/wasmpack.py\n\tsed -i \"s#Built with clang.*#Built with $$($(WASMCC) --version | head -n 1 | sed 's/\\s\\+(.*//')#\" $@\n\tsed -i \"s#Built from meshoptimizer .*#Built from meshoptimizer $$(cat src/meshoptimizer.h | grep -Po '(?<=version )[0-9.]+')#\" $@\n\tpython3 tools/wasmpack.py patch $@ base $@\n\techo \"if (typeof exports === 'object' && typeof module === 'object') module.exports = MeshoptDecoder;\" >>$@\n\techo \"else if (typeof define === 'function' && define['amd']) define([], function () { return MeshoptDecoder; });\" >>$@\n\techo \"else if (typeof exports === 'object') exports['MeshoptDecoder'] = MeshoptDecoder;\" >>$@\n\techo \"else (typeof self !== 'undefined' ? self : this).MeshoptDecoder = MeshoptDecoder;\" >>$@\n\n$(DEMO): $(DEMO_OBJECTS) $(LIBRARY)\n\t$(CXX) $^ $(LDFLAGS) -o $@\n\nvcachetuner: tools/vcachetuner.cpp tools/objloader.cpp $(LIBRARY)\n\t$(CXX) $^ -fopenmp $(CXXFLAGS) -std=c++11 $(LDFLAGS) -o $@\n\ncodecbench: tools/codecbench.cpp $(LIBRARY)\n\t$(CXX) $^ $(CXXFLAGS) $(LDFLAGS) -o $@\n\ncodecbench.js: tools/codecbench.cpp $(LIBRARY_SOURCES)\n\temcc $^ -O3 -g -DNDEBUG -s TOTAL_MEMORY=268435456 -s SINGLE_FILE=1 -o $@\n\ncodecbench-simd.js: tools/codecbench.cpp $(LIBRARY_SOURCES)\n\temcc $^ -O3 -g -DNDEBUG -s TOTAL_MEMORY=268435456 -s SINGLE_FILE=1 -msimd128 -o $@\n\ncodecbench.wasm: tools/codecbench.cpp $(LIBRARY_SOURCES)\n\t$(WASMCC) $^ -fno-exceptions --target=wasm32-wasi --sysroot=$(WASIROOT) -lc++ -lc++abi -O3 -g -DNDEBUG -o $@\n\ncodecbench-simd.wasm: tools/codecbench.cpp $(LIBRARY_SOURCES)\n\t$(WASMCC) $^ -fno-exceptions --target=wasm32-wasi --sysroot=$(WASIROOT) -lc++ -lc++abi -O3 -g -DNDEBUG -msimd128 -o $@\n\ncodectest: tools/codectest.cpp $(LIBRARY)\n\t$(CXX) $^ $(CXXFLAGS) $(LDFLAGS) -o $@\n\ncodecfuzz: tools/codecfuzz.cpp src/vertexcodec.cpp src/indexcodec.cpp src/meshletcodec.cpp\n\t$(CXX) $^ -fsanitize=fuzzer,address,undefined -O1 -g -o $@\n\nclusterfuzz: tools/clusterfuzz.cpp src/clusterizer.cpp src/partition.cpp\n\t$(CXX) $^ -fsanitize=fuzzer,address,undefined -O1 -g -o $@\n\nsimplifyfuzz: tools/simplifyfuzz.cpp src/simplifier.cpp\n\t$(CXX) $^ -fsanitize=fuzzer,address,undefined -O1 -g -o $@\n\n$(LIBRARY): $(LIBRARY_OBJECTS)\n\tar rcs $@ $^\n\n$(BUILD)/amalgamated.so: $(LIBRARY_SOURCES)\n\t@mkdir -p $(dir $@)\n\tcat $^ | $(CXX) $(CXXFLAGS) -x c++ - -I src/ -o $@ -shared -fPIC\n\n$(BUILD)/%.cpp.o: %.cpp\n\t@mkdir -p $(dir $@)\n\t$(CXX) $< $(CXXFLAGS) -c -MMD -MP -o $@\n\n$(BUILD)/%.c.o: %.c\n\t@mkdir -p $(dir $@)\n\t$(CC) $< $(CFLAGS) -c -MMD -MP -o $@\n\n-include $(OBJECTS:.o=.d)\n\nclean:\n\trm -rf $(BUILD)\n\n.PHONY: all clean format js\n" }, { "path": "README.md", "content": "# 🐇 meshoptimizer [![Actions Status](https://github.com/zeux/meshoptimizer/workflows/build/badge.svg)](https://github.com/zeux/meshoptimizer/actions) [![codecov.io](https://codecov.io/github/zeux/meshoptimizer/coverage.svg?branch=master)](https://codecov.io/github/zeux/meshoptimizer?branch=master) [![MIT](https://img.shields.io/badge/license-MIT-blue.svg)](LICENSE.md) [![GitHub](https://img.shields.io/badge/repo-github-green.svg)](https://github.com/zeux/meshoptimizer)\n\n## Purpose\n\nWhen a GPU renders triangle meshes, various stages of the GPU pipeline have to process vertex and index data. The efficiency of these stages depends on the data you feed to them; this library provides algorithms to help optimize meshes for these stages, as well as algorithms to reduce the mesh complexity and storage overhead.\n\nThe library provides a C and C++ interface for all algorithms; you can use it from C/C++ or from other languages via FFI (such as P/Invoke). If you want to use this library from Rust, you should use [meshopt crate](https://crates.io/crates/meshopt). JavaScript interface for some algorithms is available through [meshoptimizer.js](https://www.npmjs.com/package/meshoptimizer).\n\nTwo companion projects are developed and distributed alongside the library: [gltfpack](./gltf/README.md), a command-line tool that automatically optimizes glTF files, and [clusterlod.h](./demo/clusterlod.h), a single-header C/C++ library for continuous level of detail using clustered simplification.\n\n## Installing\n\nmeshoptimizer is hosted on GitHub; you can download the latest release using git:\n\n```\ngit clone -b v1.0 https://github.com/zeux/meshoptimizer.git\n```\n\nAlternatively you can [download the .zip archive from GitHub](https://github.com/zeux/meshoptimizer/archive/v1.0.zip).\n\nThe library is also available as a Linux package in several distributions ([ArchLinux](https://aur.archlinux.org/packages/meshoptimizer/), [Debian](https://packages.debian.org/libmeshoptimizer), [FreeBSD](https://www.freshports.org/misc/meshoptimizer/), [Nix](https://mynixos.com/nixpkgs/package/meshoptimizer), [Ubuntu](https://packages.ubuntu.com/libmeshoptimizer)), as well as a [Vcpkg port](https://github.com/microsoft/vcpkg/tree/master/ports/meshoptimizer) (see [installation instructions](https://learn.microsoft.com/en-us/vcpkg/get_started/get-started)) and a [Conan package](https://conan.io/center/recipes/meshoptimizer).\n\n[gltfpack](./gltf/README.md) is available as a pre-built binary on [Releases page](https://github.com/zeux/meshoptimizer/releases) or via [npm package](https://www.npmjs.com/package/gltfpack). Native binaries are recommended since they are more efficient and support texture compression.\n\n## Building\n\nmeshoptimizer is distributed as a C/C++ header (`src/meshoptimizer.h`) and a set of C++ source files (`src/*.cpp`). To include it in your project, you can use one of two options:\n\n* Use CMake to build the library (either as a standalone project or as part of your project)\n* Add source files to your project's build system\n\nThe source files are organized in such a way that you don't need to change your build-system settings, and you only need to add the source files for the algorithms you use. They should build without warnings or special compilation options on all major compilers. If you prefer amalgamated builds, you can also concatenate the source files into a single `.cpp` file and build that instead.\n\nTo use meshoptimizer functions, simply `#include` the header `meshoptimizer.h`; the library source is C++, but the header is C-compatible.\n\n## Core pipeline\n\nWhen optimizing a mesh, to maximize rendering efficiency you should typically feed it through a set of optimizations (the order is important!):\n\n1. Indexing\n2. Vertex cache optimization\n3. (optional) Overdraw optimization\n4. Vertex fetch optimization\n5. Vertex quantization\n6. (optional) Shadow indexing\n\n### Indexing\n\nMost algorithms in this library assume that a mesh has a vertex buffer and an index buffer. For algorithms to work well and also for GPU to render your mesh efficiently, the vertex buffer has to have no redundant vertices; you can generate an index buffer from an unindexed vertex buffer or reindex an existing (potentially redundant) index buffer as follows:\n\n> Note: meshoptimizer generally works with 32-bit (`unsigned int`) indices, however when using C++ APIs you can use any integer type for index data by using the provided template overloads. By convention, remap tables always use `unsigned int`.\n\nFirst, generate a remap table from your existing vertex (and, optionally, index) data:\n\n```c++\nsize_t index_count = face_count * 3;\nsize_t unindexed_vertex_count = face_count * 3;\nstd::vector remap(unindexed_vertex_count); // temporary remap table\nsize_t vertex_count = meshopt_generateVertexRemap(&remap[0], NULL, index_count,\n &unindexed_vertices[0], unindexed_vertex_count, sizeof(Vertex));\n```\n\nNote that in this case we only have an unindexed vertex buffer; when input mesh has an index buffer, it will need to be passed to `meshopt_generateVertexRemap` instead of `NULL`, along with the correct source vertex count. In either case, the remap table is generated based on binary equivalence of the input vertices, so the resulting mesh will render the same way. Binary equivalence considers all input bytes, including padding which should be zero-initialized if the vertex structure has gaps.\n\nAfter generating the remap table, you can allocate space for the target vertex buffer (`vertex_count` elements) and index buffer (`index_count` elements) and generate them:\n\n```c++\nmeshopt_remapIndexBuffer(indices, NULL, index_count, &remap[0]);\nmeshopt_remapVertexBuffer(vertices, &unindexed_vertices[0], unindexed_vertex_count, sizeof(Vertex), &remap[0]);\n```\n\nYou can then further optimize the resulting buffers by calling the other functions on them in-place.\n\n`meshopt_generateVertexRemap` uses binary equivalence of vertex data, which is generally a reasonable default; however, in some cases some attributes may have floating point drift causing extra vertices to be generated. For such cases, it may be necessary to quantize some attributes (most importantly, normals and tangents) before generating the remap, or use `meshopt_generateVertexRemapCustom` algorithm that allows comparing individual attributes with tolerance by providing a custom comparison function:\n\n```c++\nsize_t vertex_count = meshopt_generateVertexRemapCustom(&remap[0], NULL, index_count,\n &unindexed_vertices[0].px, unindexed_vertex_count, sizeof(Vertex),\n [&](unsigned int lhs, unsigned int rhs) -> bool {\n const Vertex& lv = unindexed_vertices[lhs];\n const Vertex& rv = unindexed_vertices[rhs];\n\n return fabsf(lv.tx - rv.tx) < 1e-3f && fabsf(lv.ty - rv.ty) < 1e-3f;\n });\n```\n\n### Vertex cache optimization\n\nWhen the GPU renders the mesh, it runs the vertex shader for each vertex. Historically, GPUs used a small fixed-size post-transform cache (16-32 vertices) with different replacement policies to store the shader output and avoid redundant shader invocations. Modern GPUs still perform vertex reuse, but with substantially different mechanics: vertex invocations are batched into thread groups based on the input indices, and effective reuse depends on factors like vertex shader outputs and rasterizer throughput. To maximize the locality of reused vertex references, you have to reorder your triangles like so:\n\n```c++\nmeshopt_optimizeVertexCache(indices, indices, index_count, vertex_count);\n```\n\nThe details of vertex reuse vary between different GPU architectures, so vertex cache optimization uses an adaptive algorithm that produces a triangle sequence with good locality that works well across different GPUs. Alternatively, you can use an algorithm that optimizes specifically for fixed-size FIFO caches: `meshopt_optimizeVertexCacheFifo` (with a recommended cache size of 16). While it generally produces less performant results on most GPUs, it runs ~2x faster, which may benefit rapid content iteration.\n\n### Overdraw optimization\n\nAfter transforming the vertices, GPU sends the triangles for rasterization which results in generating pixels that are usually first run through the depth test, and pixels that pass it get the pixel shader executed to generate the final color. As pixel shaders get more expensive, it becomes more and more important to reduce overdraw. While in general improving overdraw requires view-dependent operations, this library provides an algorithm to reorder triangles to minimize the overdraw from all directions, which you can run after vertex cache optimization like this:\n\n```c++\nmeshopt_optimizeOverdraw(indices, indices, index_count, &vertices[0].x, vertex_count, sizeof(Vertex), 1.05f);\n```\n\nThe overdraw optimizer needs to read vertex positions as a float3 from the vertex; the code snippet above assumes that the vertex stores position as `float x, y, z`.\n\nWhen performing the overdraw optimization you have to specify a floating-point threshold parameter. The algorithm tries to maintain a balance between vertex cache efficiency and overdraw; the threshold determines how much the algorithm can compromise the vertex cache hit ratio, with 1.05 meaning that the resulting ratio should be at most 5% worse than before the optimization.\n\nNote that depending on the renderer structure and target hardware, the optimization may or may not be beneficial; for example, mobile GPUs with tiled deferred rendering (PowerVR, Apple) would not benefit from this optimization. For vertex heavy scenes it's recommended to measure the performance impact to ensure that the reduced vertex cache efficiency is outweighed by the reduced overdraw.\n\n### Vertex fetch optimization\n\nAfter the final triangle order has been established, we still can optimize the vertex buffer for memory efficiency. Before running the vertex shader GPU has to fetch the vertex attributes from the vertex buffer; the fetch is usually backed by a memory cache, and as such optimizing the data for the locality of memory access is important. You can do this by running this code:\n\n```c++\nmeshopt_optimizeVertexFetch(vertices, indices, index_count, vertices, vertex_count, sizeof(Vertex));\n```\n\nThis will reorder the vertices in the vertex buffer to try to improve the locality of reference, and rewrite the indices in place to match; if the vertex data is stored using multiple streams, you should use `meshopt_optimizeVertexFetchRemap` instead. This optimization has to be performed on the final index buffer since the optimal vertex order depends on the triangle order.\n\nNote that the algorithm does not try to model cache replacement precisely and instead just orders vertices in the order of use, which generally produces results that are close to optimal.\n\n### Vertex quantization\n\nTo optimize memory bandwidth when fetching the vertex data even further, and to reduce the amount of memory required to store the mesh, it is often beneficial to quantize the vertex attributes to smaller types. While this optimization can technically run at any part of the pipeline (and sometimes doing quantization as the first step can improve indexing by merging almost identical vertices), it generally is easier to run this after all other optimizations since some of them require access to float3 positions.\n\nQuantization is usually domain specific; it's common to quantize normals using 3 8-bit integers but you can use higher-precision quantization (for example using 10 bits per component in a 10_10_10_2 format), or a different encoding to use just 2 components. For positions and texture coordinate data the two most common storage formats are half precision floats, and 16-bit normalized integers that encode the position relative to the AABB of the mesh or the UV bounding rectangle.\n\nThe number of possible combinations here is very large but this library does provide the building blocks, specifically functions to quantize floating point values to normalized integers, as well as half-precision floats. For example, here's how you can quantize a normal using 10-10-10 SNORM encoding:\n\n```c++\nunsigned int normal =\n ((meshopt_quantizeSnorm(v.nx, 10) & 1023) << 20) |\n ((meshopt_quantizeSnorm(v.ny, 10) & 1023) << 10) |\n (meshopt_quantizeSnorm(v.nz, 10) & 1023);\n```\n\nand here's how you can quantize a position using half precision floats:\n\n```c++\nunsigned short px = meshopt_quantizeHalf(v.x);\nunsigned short py = meshopt_quantizeHalf(v.y);\nunsigned short pz = meshopt_quantizeHalf(v.z);\n```\n\nSince quantized vertex attributes often need to remain in their compact representations for efficient transfer and storage, they are usually dequantized during vertex processing by configuring the GPU vertex input correctly to expect normalized integers or half precision floats, which often needs no or minimal changes to the shader code. When CPU dequantization is required instead, `meshopt_dequantizeHalf` can be used to convert half precision values back to single precision; for normalized integer formats, the dequantization just requires dividing by 2^N-1 for unorm and 2^(N-1)-1 for snorm variants. For example, manually reversing `meshopt_quantizeUnorm(v, 10)` can be done by dividing by 1023.\n\n### Shadow indexing\n\nMany rendering pipelines require meshes to be rendered to depth-only targets, such as shadow maps or during a depth pre-pass, in addition to color/G-buffer targets. While using the same geometry data for both cases is possible, reducing the number of unique vertices for depth-only rendering can be beneficial, especially when the source geometry has many attribute seams due to faceted shading or lightmap texture seams.\n\nTo achieve this, this library provides the `meshopt_generateShadowIndexBuffer` algorithm, which generates a second (shadow) index buffer that can be used with the original vertex data:\n\n```c++\nstd::vector shadow_indices(index_count);\n// note: this assumes Vertex starts with float3 positions and should be adjusted accordingly for quantized positions\nmeshopt_generateShadowIndexBuffer(&shadow_indices[0], indices, index_count, &vertices[0].x, vertex_count, sizeof(float) * 3, sizeof(Vertex));\n```\n\nBecause the vertex data is shared, shadow indexing should be done after other optimizations of the vertex/index data. However, it's possible (and recommended) to optimize the resulting shadow index buffer for vertex cache:\n\n```c++\nmeshopt_optimizeVertexCache(&shadow_indices[0], &shadow_indices[0], index_count, vertex_count);\n```\n\nIn some cases, it may be beneficial to split the vertex positions into a separate buffer to maximize efficiency for depth-only rendering. Note that the example above assumes only positions are relevant for shadow rendering, but more complex materials may require adding texture coordinates (for alpha testing) or skinning data to the vertex portion used as a key. `meshopt_generateShadowIndexBufferMulti` can be useful for these cases if the relevant data is not contiguous.\n\nNote that for meshes with optimal indexing and few attribute seams, the shadow index buffer will be very similar to the original index buffer, so it may not be always worth generating a separate shadow index buffer even if the rendering pipeline relies on depth-only passes.\n\n## Clusterization\n\nWhile traditionally meshes have served as a unit of rendering, new approaches to rendering and raytracing are starting to use a smaller unit of work, such as clusters or meshlets. This allows more freedom in how the geometry is processed, and can lead to better performance and more efficient use of GPU hardware. This section describes algorithms designed to work with meshes as sets of clusters.\n\n### Mesh shading\n\nModern GPUs are beginning to deviate from the traditional rasterization model. NVidia GPUs starting from Turing and AMD GPUs starting from RDNA2 provide a new programmable geometry pipeline that, instead of being built around index buffers and vertex shaders, is built around mesh shaders - a new shader type that allows to provide a batch of work to the rasterizer.\n\nUsing mesh shaders in context of traditional mesh rendering provides an opportunity to use a variety of optimization techniques, starting from more efficient vertex reuse, using various forms of culling (e.g. cluster frustum or occlusion culling) and in-memory compression to maximize the utilization of GPU hardware. Beyond traditional rendering mesh shaders provide a richer programming model that can synthesize new geometry more efficiently than common alternatives such as geometry shaders. Mesh shading can be accessed via Vulkan or Direct3D 12 APIs; please refer to [Introduction to Turing Mesh Shaders](https://developer.nvidia.com/blog/introduction-turing-mesh-shaders/) and [Mesh Shaders and Amplification Shaders: Reinventing the Geometry Pipeline](https://devblogs.microsoft.com/directx/coming-to-directx-12-mesh-shaders-and-amplification-shaders-reinventing-the-geometry-pipeline/) for additional information.\n\nTo use mesh shaders for conventional rendering efficiently, geometry needs to be converted into a series of meshlets; each meshlet represents a small subset of the original mesh and comes with a small set of vertices and a separate micro-index buffer that references vertices in the meshlet. This information can be directly fed to the rasterizer from the mesh shader. This library provides algorithms to create meshlet data for a mesh, and - assuming geometry is static - can compute bounding information that can be used to perform cluster culling, rejecting meshlets that are invisible on screen.\n\nTo generate meshlet data, this library provides `meshopt_buildMeshlets` algorithm, which tries to balance topological efficiency (by maximizing vertex reuse inside meshlets) with culling efficiency (by minimizing meshlet radius and triangle direction divergence) and produces GPU-friendly data. As an alternative (that can be useful for load-time processing), `meshopt_buildMeshletsScan` can create the meshlet data using a vertex cache-optimized index buffer as a starting point by greedily aggregating consecutive triangles until they go over the meshlet limits. `meshopt_buildMeshlets` is recommended for offline data processing even if cone culling is not used.\n\n```c++\nconst size_t max_vertices = 64;\nconst size_t max_triangles = 126; // note: in v0.25 or prior, max_triangles needs to be divisible by 4\nconst float cone_weight = 0.0f;\n\nsize_t max_meshlets = meshopt_buildMeshletsBound(indices.size(), max_vertices, max_triangles);\nstd::vector meshlets(max_meshlets);\nstd::vector meshlet_vertices(indices.size());\nstd::vector meshlet_triangles(indices.size()); // note: in v0.25 or prior, use indices.size() + max_meshlets * 3\n\nsize_t meshlet_count = meshopt_buildMeshlets(meshlets.data(), meshlet_vertices.data(), meshlet_triangles.data(), indices.data(),\n indices.size(), &vertices[0].x, vertices.size(), sizeof(Vertex), max_vertices, max_triangles, cone_weight);\n```\n\nTo generate the meshlet data, `max_vertices` and `max_triangles` need to be set within limits supported by the hardware; for NVidia the values of 64 and 126 are recommended. `cone_weight` should be left as 0 if cluster cone culling is not used, and set to a value between 0 and 1 to balance cone culling efficiency with other forms of culling like frustum or occlusion culling (`0.25` is a reasonable default).\n\n> Note that for earlier AMD GPUs, the best configurations tend to use the same limits for `max_vertices` and `max_triangles`, such as 64 and 64, or 128 and 128. Additionally, while NVidia recommends 64/126 as a good configuration, consider using a different configuration like `max_vertices 64, max_triangles 96`, to provide more realistic limits that are achievable on real-world meshes, and to reduce the overhead on other GPUs.\n\nEach resulting meshlet refers to a portion of `meshlet_vertices` and `meshlet_triangles` arrays; the arrays are overallocated for the worst case so it's recommended to trim them before saving them as an asset / uploading them to the GPU:\n\n```c++\nconst meshopt_Meshlet& last = meshlets[meshlet_count - 1];\n\nmeshlet_vertices.resize(last.vertex_offset + last.vertex_count);\nmeshlet_triangles.resize(last.triangle_offset + last.triangle_count * 3);\nmeshlets.resize(meshlet_count);\n```\n\nDepending on the application, other strategies of storing the data can be useful; for example, `meshlet_vertices` serves as indices into the original vertex buffer but it might be worthwhile to generate a mini vertex buffer for each meshlet to remove the extra indirection when accessing vertex data, or it might be desirable to compress vertex data as vertices in each meshlet are likely to be very spatially coherent.\n\nFor optimal performance, it is recommended to further optimize each meshlet in isolation for better triangle and vertex locality by calling `meshopt_optimizeMeshlet` on vertex and index data like so:\n\n```c++\nmeshopt_optimizeMeshlet(&meshlet_vertices[m.vertex_offset], &meshlet_triangles[m.triangle_offset], m.triangle_count, m.vertex_count);\n```\n\nDifferent applications will choose different strategies for rendering meshlets; on a GPU capable of mesh shading, meshlets can be rendered directly; for example, a basic GLSL shader for `VK_EXT_mesh_shader` extension could look like this (parts omitted for brevity):\n\n```glsl\nlayout(binding = 0) readonly buffer Meshlets { Meshlet meshlets[]; };\nlayout(binding = 1) readonly buffer MeshletVertices { uint meshlet_vertices[]; };\nlayout(binding = 2) readonly buffer MeshletTriangles { uint8_t meshlet_triangles[]; };\n\nvoid main() {\n Meshlet meshlet = meshlets[gl_WorkGroupID.x];\n SetMeshOutputsEXT(meshlet.vertex_count, meshlet.triangle_count);\n\n for (uint i = gl_LocalInvocationIndex; i < meshlet.vertex_count; i += gl_WorkGroupSize.x) {\n uint index = meshlet_vertices[meshlet.vertex_offset + i];\n gl_MeshVerticesEXT[i].gl_Position = world_view_projection * vec4(vertex_positions[index], 1);\n }\n\n for (uint i = gl_LocalInvocationIndex; i < meshlet.triangle_count; i += gl_WorkGroupSize.x) {\n uint offset = meshlet.triangle_offset + i * 3;\n gl_PrimitiveTriangleIndicesEXT[i] = uvec3(\n meshlet_triangles[offset], meshlet_triangles[offset + 1], meshlet_triangles[offset + 2]);\n }\n}\n```\n\n> Note that DirectX 12 mesh shaders cannot index raw buffers using arbitrary byte offsets. Use a typed SRV buffer (`Buffer`) with `DXGI_FORMAT_R8_UINT` format, repack each triangle to 32 bits to be able to use aligned 32-bit loads with `ByteAddressBuffer`, or consider utilizing [16-bit scalar types](https://github.com/microsoft/DirectXShaderCompiler/wiki/16-Bit-Scalar-Types) to load a 3-byte triangle using two aligned 16-bit loads like so: `Buffer.Load(triangle_offset & ~1)`, then extracting indices with bitwise operations based on `triangle_offset & 1`.\n\nAfter generating the meshlet data, it's possible to generate extra data for each meshlet that can be saved and used at runtime to perform cluster culling, where each meshlet can be discarded if it's guaranteed to be invisible. To generate the data, `meshopt_computeMeshletBounds` can be used:\n\n```c++\nmeshopt_Bounds bounds = meshopt_computeMeshletBounds(&meshlet_vertices[m.vertex_offset], &meshlet_triangles[m.triangle_offset],\n m.triangle_count, &vertices[0].x, vertices.size(), sizeof(Vertex));\n```\n\nThe resulting `bounds` values can be used to perform frustum or occlusion culling using the bounding sphere, or cone culling using the cone axis/angle (which will reject the entire meshlet if all triangles are guaranteed to be back-facing from the camera point of view):\n\n```c++\nif (dot(normalize(cone_apex - camera_position), cone_axis) >= cone_cutoff) reject();\n```\n\nCluster culling should ideally run at a lower frequency than mesh shading, either using amplification/task shaders, or using a separate compute dispatch.\n\nBy default, the meshlet builder tries to form complete meshlets even if that requires merging disconnected regions of the mesh into a single meshlet. In some cases, such as hierarchical level of detail, or when advanced culling is used, it may be beneficial to prioritize spatial locality of triangles in a meshlet even if that results in partially filled meshlets. To that end, `meshopt_buildMeshletsFlex` function can be used instead of `meshopt_buildMeshlets`; it provides two triangle limits, `min_triangles` and `max_triangles`, and uses an additional configuration parameter, `split_factor` (recommended value is 2.0), to decide whether increasing the meshlet radius is worth it to fit more triangles in the meshlet. When using this function, the worst case bound for the number of meshlets has to be computed using `meshopt_buildMeshletsBound` with `min_triangles` parameter instead of `max_triangles`.\n\n### Clustered raytracing\n\nIn addition to rasterization, meshlets can also be used for ray tracing. NVidia GPUs starting from Turing with recent drivers provide support for cluster acceleration structures (via `VK_NV_cluster_acceleration_structure` extension / NVAPI); instead of building a traditional BLAS, a cluster acceleration structure can be built for each meshlet and combined into a single clustered BLAS. While this currently results in reduced ray tracing performance for static geometry (for which a traditional BLAS may be more suitable), it allows updating the individual clusters without having to rebuild or refit the entire BLAS, which can be useful for mesh deformation or hierarchical level of detail.\n\nWhen using meshlets for raytracing, the performance characteristics that matter differ from when rendering meshes with rasterization. For raytracing, clusters with optimal spatial division that minimize ray-triangle intersection tests are preferred, while for rasterization, clusters with maximum triangle count within vertex limits are ideal.\n\nTo generate meshlets optimized for raytracing, this library provides `meshopt_buildMeshletsSpatial` algorithm, which builds clusters using surface area heuristic (SAH) to produce raytracing-friendly cluster distributions:\n\n```c++\nconst size_t max_vertices = 64;\nconst size_t min_triangles = 16;\nconst size_t max_triangles = 64;\nconst float fill_weight = 0.5f;\n\nsize_t max_meshlets = meshopt_buildMeshletsBound(indices.size(), max_vertices, min_triangles); // note: use min_triangles to compute worst case bound\nstd::vector meshlets(max_meshlets);\nstd::vector meshlet_vertices(indices.size());\nstd::vector meshlet_triangles(indices.size()); // note: in v0.25 or prior, use indices.size() + max_meshlets * 3\n\nsize_t meshlet_count = meshopt_buildMeshletsSpatial(meshlets.data(), meshlet_vertices.data(), meshlet_triangles.data(), indices.data(),\n indices.size(), &vertices[0].x, vertices.size(), sizeof(Vertex), max_vertices, min_triangles, max_triangles, fill_weight);\n```\n\nThe algorithm recursively subdivides the triangles into a BVH-like hierarchy using SAH for optimal spatial partitioning while balancing cluster size; this results in clusters that are significantly more efficient to raytrace compared to clusters generated by `meshopt_buildMeshlets`, but can still be used for rasterization (for example, to build visibility buffers or G-buffers).\n\nThe `min_triangles` and `max_triangles` parameters control the allowed range of triangles per cluster. For optimal raytracing performance, `min_triangles` should be at most `max_triangles/2` (or, ideally, `max_triangles/4`) to give the algorithm enough freedom to produce high-quality spatial partitioning. For meshes with few seams due to normal or UV discontinuities, using `max_vertices` equal to `max_triangles` is recommended when rasterization performance is a concern; for meshes with many seams or for renderers that primarily use meshlets for ray tracing, a higher `max_vertices` value should be used as it ensures that more clusters can fully utilize the triangle limit.\n\nThe `fill_weight` parameter (typically between 0 and 1, although values higher than 1 could be used to prioritize cluster fill even more) controls the trade-off between pure SAH optimization and triangle utilization. A value of 0 will optimize purely for SAH, resulting in best raytracing performance but potentially smaller clusters. Values between 0.25 and 0.75 typically provide a good balance of SAH quality vs triangle count.\n\nWhen the resulting meshlets are used to generate hardware-specific acceleration structures, using fast trace (e.g. `VK_BUILD_ACCELERATION_STRUCTURE_PREFER_FAST_TRACE_BIT_KHR`) builds results in maximum performance; if build performance is important, using `meshopt_optimizeMeshlet` can help improve ray tracing performance when using fast build (e.g. `VK_BUILD_ACCELERATION_STRUCTURE_PREFER_FAST_BUILD_BIT_KHR`), although the tracing performance will still be lower than with fast trace builds.\n\n### Point cloud clusterization\n\nBoth of the meshlet algorithms are designed to work with triangle meshes. In some cases, splitting a point cloud into fixed size clusters can be useful; the resulting point clusters could be rendered via mesh or compute shaders, or the resulting subdivision can be used to parallelize point processing while maintaining locality of points. To that end, this library provides `meshopt_spatialClusterPoints` algorithm:\n\n```c++\nconst size_t cluster_size = 256;\n\nstd::vector index(mesh.vertices.size());\nmeshopt_spatialClusterPoints(&index[0], &mesh.vertices[0].px, mesh.vertices.size(), sizeof(Vertex), cluster_size);\n```\n\nThe resulting index buffer could be used to process the points directly, or reorganize the point data into flat contiguous arrays. Every consecutive chunk of `cluster_size` points in the index buffer refers to a single cluster, with just the last cluster containing fewer points if the total number of points is not a multiple of `cluster_size`. Note that the index buffer is not a remap table, so `meshopt_remapVertexBuffer` can't be used to flatten the point data.\n\n### Cluster partitioning\n\nWhen working with clustered geometry, it can be beneficial to organize clusters into larger groups (partitions) for more efficient processing or workload distribution. This library provides an algorithm to partition clusters into groups of similar size while prioritizing locality:\n\n```c++\nconst size_t partition_size = 24;\n\nstd::vector cluster_partitions(cluster_count);\nsize_t partition_count = meshopt_partitionClusters(&cluster_partitions[0], &cluster_indices[0], total_index_count,\n &cluster_index_counts[0], cluster_count, &vertices[0].x, vertex_count, sizeof(Vertex), partition_size);\n```\n\nThe algorithm assigns each cluster to a partition, aiming for a target partition size while prioritizing topological locality (sharing vertices) and spatial locality. The resulting partitions can be used for more efficient batched processing of clusters, or for hierarchical simplification schemes similar to Nanite.\n\nTwo clusters are considered topologically adjacent if they reference the same indices. In some cases, it can be helpful to process the indices using `meshopt_generateShadowIndexBuffer` (or remap them manually using the remap table generated by `meshopt_generatePositionRemap`), which allows clusters to be considered adjacent even when boundary vertices have different indices due to attribute discontinuities.\n\nIf vertex positions are specified (not `NULL`), spatial locality will influence priority of merging clusters; otherwise, the algorithm will rely solely on topological connections and will not merge disconnected clusters into the same partition, which may result in smaller partitions for some inputs.\n\nAfter partitioning, each element in the destination array contains the partition ID (ranging from 0 to the returned partition count minus 1) for the corresponding cluster. Note that the partitions may be both smaller and larger than the target size; given a target size, the maximum partition size returned currently is `target + target / 3`.\n\n## Mesh compression\n\nIn case storage size or transmission bandwidth is of importance, you might want to additionally compress vertex and index data. While several mesh compression libraries, like Google Draco, are available, they typically are designed to maximize the compression ratio at the cost of disturbing the vertex/index order (which makes the meshes inefficient to render on GPU) or decompression performance. They also frequently don't support custom game-ready quantized vertex formats and thus require to re-quantize the data after loading it, introducing extra quantization errors and making decoding slower.\n\nAlternatively you can use general purpose compression libraries like zstd or Oodle to compress vertex/index data - however these compressors aren't designed to exploit redundancies in vertex/index data and as such compression rates can be unsatisfactory.\n\nTo that end, this library provides algorithms to \"encode\" vertex and index data. The result of the encoding is generally significantly smaller than initial data, and remains compressible with general purpose compressors - so you can either store encoded data directly (for modest compression ratios and maximum decoding performance), or further compress it with LZ4/zstd/Oodle to maximize compression ratio.\n\n> Note: this compression scheme is available as a glTF extension [EXT_meshopt_compression](https://github.com/KhronosGroup/glTF/blob/main/extensions/2.0/Vendor/EXT_meshopt_compression/README.md) as well as [KHR_meshopt_compression](https://github.com/KhronosGroup/glTF/pull/2517).\n\n### Vertex compression\n\nThis library provides a lossless algorithm to encode/decode vertex data. To encode vertices, you need to allocate a target buffer (using the worst case bound) and call the encoding function:\n\n```c++\nstd::vector vbuf(meshopt_encodeVertexBufferBound(vertex_count, sizeof(Vertex)));\nvbuf.resize(meshopt_encodeVertexBuffer(&vbuf[0], vbuf.size(), vertices, vertex_count, sizeof(Vertex)));\n```\n\nTo decode the data at runtime, call the decoding function:\n\n```c++\nint res = meshopt_decodeVertexBuffer(vertices, vertex_count, sizeof(Vertex), &vbuf[0], vbuf.size());\nassert(res == 0);\n```\n\nNote that vertex encoding assumes that vertex buffer was optimized for vertex fetch, and that vertices are quantized. Feeding unoptimized data into the encoder may result in poor compression ratios. The codec is lossless by itself - the only lossy step is quantization/reordering or filters that you may apply before encoding. Additionally, if the vertex data contains padding bytes, they should be zero-initialized to ensure that the encoder does not need to store uninitialized data.\n\nDecoder is heavily optimized and can directly target write-combined memory; you can expect it to run at 3-6 GB/s on modern desktop CPUs. Compression ratio depends on the data; vertex data compression ratio is typically around 2-4x (compared to already quantized and optimally packed data). General purpose lossless compressors can further improve the compression ratio at some cost to decoding performance.\n\nThe vertex codec tries to take advantage of the inherent locality of sequential vertices and identify bit patterns that repeat in consecutive vertices. Typically, vertex cache + vertex fetch provides a reasonably local vertex traversal order; without an index buffer, it is recommended to sort vertices spatially (via `meshopt_spatialSortRemap`) to improve the compression ratio.\n\nIt is crucial to correctly specify the stride when encoding vertex data; however, for compression ratio it does not matter whether the vertices are interleaved or deinterleaved, as the codecs perform full byte deinterleaving internally. The stride of each stream must be a multiple of 4 bytes.\n\nFor optimal compression results, the values should be quantized to small integers. It can be valuable to use bit counts that are not multiples of 8. For example, instead of using 16 bits to represent texture coordinates, use 12-bit integers and divide by 4095 in the shader. Alternatively, using half-precision floats can often achieve good results.\nFor single-precision floating-point data, it's recommended to use `meshopt_quantizeFloat` to remove entropy from the lower bits of the mantissa; for best results, consider using 15 bits or 7 bits for extreme compression.\nFor normal or tangent vectors, using octahedral encoding is recommended over three components as it reduces redundancy; similarly, consider using 10-12 bits per component instead of 16.\n\nWhen data is bit packed, specifying compression level 3 (via `meshopt_encodeVertexBufferLevel`) can improve the compression further by redistributing bits between components.\n\n### Index compression\n\nThis library also provides algorithms to encode/decode index data. To encode triangle indices, you need to allocate a target buffer (using the worst case bound) and call the encoding function:\n\n```c++\nstd::vector ibuf(meshopt_encodeIndexBufferBound(index_count, vertex_count));\nibuf.resize(meshopt_encodeIndexBuffer(&ibuf[0], ibuf.size(), indices, index_count));\n```\n\nTo decode the data at runtime, call the decoding function:\n\n```c++\nint res = meshopt_decodeIndexBuffer(indices, index_count, &ibuf[0], ibuf.size());\nassert(res == 0);\n```\n\nNote that index encoding assumes that the index buffer was optimized for vertex cache and vertex fetch. Feeding unoptimized data into the encoder will result in poor compression ratios. Codec preserves the order of triangles, however it can rotate each triangle to improve compression ratio (which means the provoking vertex may change).\n\nDecoder is heavily optimized and can directly target write-combined memory; you can expect it to run at 3-6 GB/s on modern desktop CPUs.\n\nThe index codec targets 1 byte per triangle as a best case (6x smaller than raw 16-bit index data); on real-world meshes, it's typical to achieve 1-1.2 bytes per triangle. To reach this, the index data needs to be optimized for vertex cache and vertex fetch. Optimizations that do not disrupt triangle locality (such as overdraw) are safe to use in between.\nTo reduce the data size further, it's possible to use `meshopt_optimizeVertexCacheStrip` instead of `meshopt_optimizeVertexCache` when optimizing for vertex cache. This trades off some efficiency in vertex transform for smaller index (and sometimes vertex) data.\n\nWhen referenced vertex indices are not sequential, the index codec will use around 2 bytes per index. This can happen when the referenced vertices are a sparse subset of the vertex buffer, such as when encoding LODs. General-purpose compression can be especially helpful in this case.\n\nIndex buffer codec only supports triangle list topology; when encoding triangle strips or line lists, use `meshopt_encodeIndexSequence`/`meshopt_decodeIndexSequence` instead. This codec typically encodes indices into ~1 byte per index, but compressing the results further with a general purpose compressor can improve the results to 1-3 bits per index.\n\n\n### Meshlet compression\n\nWhen using mesh shading or clustered raytracing, meshlet vertex reference and triangle data can be compressed similarly to index data. This library provides a dedicated codec that exploits locality inherent in meshlet data. Unlike vertex and index buffer codecs that work on entire buffers, the meshlet codec encodes each meshlet independently; this allows applications to have more flexibility in structuring the runtime storage and adjust the decoded data during decoding. This also means that in some applications, additional data describing the meshlet (vertex/triangle count, encoded size) will need to be encoded into the meshlet stream, if it isn't already available during decoding.\n\nTo encode a meshlet, you need to allocate a target buffer (using the worst case bound) and call the encoding function with the vertex index references and micro-index buffer, as produced by `meshopt_buildMeshlets`:\n\n```c++\nstd::vector mbuf(meshopt_encodeMeshletBound(max_vertices, max_triangles));\n\nfor (const meshopt_Meshlet& m : meshlets)\n{\n size_t msize = meshopt_encodeMeshlet(&mbuf[0], mbuf.size(),\n &meshlet_vertices[m.vertex_offset], m.vertex_count, &meshlet_triangles[m.triangle_offset], m.triangle_count);\n\n // write m.vertex_count, m.triangle_count, msize and mbuf[0..msize-1] to the output stream\n}\n```\n\nTo decode the data at runtime, call the decoding function:\n\n```c++\nuint16_t* vertices = ...;\nuint8_t* triangles = ...;\n\n// automatically deduces `vertex_size=2` and `triangle_size=3` based on pointer types\nint res = meshopt_decodeMeshlet(vertices, m.vertex_count, triangles, m.triangle_count, stream, encoded_size);\nassert(res == 0);\n```\n\nVertex index references can be decoded as either 16-bit or 32-bit integers; triangle data can be decoded as 3 bytes per triangle (matching `meshopt_buildMeshlets` output format) or as a 32-bit integer per triangle (with indices packed as `a | (b << 8) | (c << 16)` and top byte unused). Output buffers must have available space aligned to 4 bytes; for example, decoding a 3-triangle stream using 3 bytes per triangle needs to be able to write 12 bytes to the output triangles array.\n\nWhen using the C++ API, `meshopt_decodeMeshlet` will automatically deduce the element sizes based on the types of vertex and triangle pointers; when using the C API, the sizes need to be specified explicitly.\n\nDecoder is heavily optimized and can directly target write-combined memory; you can expect it to run at 7-10 GB/s on modern desktop CPUs.\n\n> Applications that do most of the streaming decompression on the GPU can also decode meshlet data on the GPU if CPU decoding is inconvenient; an example [meshletdec.slang](./demo/meshletdec.slang) shader is provided for 32-bit output format, and can be easily adapted to other formats, including custom ones.\n\nNote that meshlet encoding assumes that the meshlet data was optimized; meshlets should be processed using `meshopt_optimizeMeshlet` before encoding. Additionally, vertex references should have a high degree of reference locality; this can be achieved by building meshlets from meshes optimized for vertex cache/fetch, or linearizing the vertex reference data (and reordering the vertex buffer accordingly). Feeding unoptimized data into the encoder will result in poor compression ratios. Codec preserves the order of triangles, however it can rotate each triangle to improve compression ratio (which means the provoking vertex may change).\n\nMeshlets without vertex references are supported; passing `NULL` vertices and `0` vertex count during encoding and decoding will produce encoded meshlets with just triangle data. Note that parameters supplied during decoding must match those used during encoding; if a meshlet was encoded with vertex references, it must be decoded with the same number of vertex references.\n\nThe meshlet codec targets 5-7 bits per triangle for triangle data; when vertex references are encoded, the encoded size strongly depends on how linear the references are, but it's typical to see 9-12 bits per triangle in aggregate. To reduce the compressed size further, it's possible to compress the resulting encoded data with a general purpose compressor, which usually achieves 5-8 bits/triangle in aggregate; note that in this case general purpose compressors should be applied to a stream with many encoded meshlets at once to amortize their overhead.\n\n> Note: this codec is currently experimental and the data format and APIs are subject to change.\n\n### Point cloud compression\n\nThe vertex encoding algorithms can be used to compress arbitrary streams of attribute data; one other use case besides triangle meshes is point cloud data. Typically point clouds come with position, color and possibly other attributes but don't have an implied point order.\n\nTo compress point clouds efficiently, it's recommended to first preprocess the points by sorting them using the spatial sort algorithm:\n\n```c++\nstd::vector remap(point_count);\nmeshopt_spatialSortRemap(&remap[0], positions, point_count, sizeof(vec3));\n\n// for each attribute stream\nmeshopt_remapVertexBuffer(positions, positions, point_count, sizeof(vec3), &remap[0]);\n```\n\nAfter this the resulting arrays should be quantized (e.g. using 16-bit fixed point numbers for positions and 8-bit color components), and the result can be compressed using `meshopt_encodeVertexBuffer` as described in the previous section. To decompress, `meshopt_decodeVertexBuffer` will recover the quantized data that can be used directly or converted back to original floating-point data. The compression ratio depends on the nature of source data, for colored points it's typical to get 35-40 bits per point.\n\n### Vertex filters\n\nTo further leverage the inherent structure of some vertex data, it's possible to use filters that encode and decode the data in a lossy manner. This is similar to quantization but can be used without having to change the shader code. After decoding, the filter transformation needs to be reversed. For native game engine pipelines, it is usually more optimal to carefully prequantize and pretransform the vertex data, but sometimes (for example when serializing data in glTF format) this is not a practical option and filters are more convenient. This library provides four filters:\n\n- Octahedral filter (`meshopt_encodeFilterOct`/`meshopt_decodeFilterOct`) encodes quantized (snorm) normal or tangent vectors using octahedral encoding. Any number of bits between 2 and 16 can be used with 4 bytes or 8 bytes per vector.\n- Quaternion filter (`meshopt_encodeFilterQuat`/`meshopt_decodeFilterQuat`) encodes quantized (snorm) quaternion vectors; this can be used to encode rotations or tangent frames. Any number of bits between 4 and 16 can be used with 8 bytes per vector.\n- Exponential filter (`meshopt_encodeFilterExp`/`meshopt_decodeFilterExp`) encodes single-precision floating-point vectors; this can be used to encode arbitrary floating-point data more efficiently. In addition to an arbitrary bit count (<= 24), the filter takes a \"mode\" parameter that allows specifying how the exponent sharing is performed to trade off compression ratio and quality:\n - `meshopt_EncodeExpSeparate` does not share exponents and results in the largest output\n - `meshopt_EncodeExpSharedVector` shares exponents between different components of the same vector\n - `meshopt_EncodeExpSharedComponent` shares exponents between the same component in different vectors\n - `meshopt_EncodeExpClamped` does not share exponents but clamps the exponent range to reduce exponent entropy\n- Color filter (`meshopt_encodeFilterColor`/`meshopt_decodeFilterColor`) encodes quantized (unorm) RGBA colors using YCoCg encoding. Any number of bits between 2 and 16 can be used with 4 bytes or 8 bytes per vector.\n\nNote that all filters are lossy and require the data to be deinterleaved with one attribute per stream; this facilitates efficient SIMD implementation of filter decoders, which decodes at 5-10 GB/s on modern desktop CPUs, allowing the overall decompression speed to be closer to that of the raw vertex codec.\n\n### Versioning and compatibility\n\nThe following guarantees on data compatibility are provided for point releases (*no* guarantees are given for development branch):\n\n- Data encoded with older versions of the library can always be decoded with newer versions;\n- Data encoded with newer versions of the library can be decoded with older versions, provided that encoding versions are set correctly; if binary stability of encoded data is important, use `meshopt_encodeVertexVersion` and `meshopt_encodeIndexVersion` to 'pin' the data versions (or `version` argument of `meshopt_encodeVertexBufferLevel`).\n\nBy default, vertex data is encoded for format version 1 (compatible with meshoptimizer v0.23+), and index data is encoded for format version 1 (compatible with meshoptimizer v0.14+). When decoding the data, the decoder will automatically detect the version from the data header.\n\n## Simplification\n\nAll algorithms presented so far don't affect visual appearance at all, with the exception of quantization that has minimal controlled impact. However, fundamentally the most effective way to reduce the rendering or transmission cost of a mesh is to reduce the number of triangles in the mesh.\n\n### Basic simplification\n\nThis library provides a simplification algorithm, `meshopt_simplify`, that reduces the number of triangles in the mesh. Given a vertex and an index buffer, it generates a second index buffer that uses existing vertices in the vertex buffer. This index buffer can be used directly for rendering with the original vertex buffer (preferably after vertex cache optimization using `meshopt_optimizeVertexCache`), or a new compact vertex/index buffer can be generated using `meshopt_optimizeVertexFetch` that uses the optimal number and order of vertices.\n\n```c++\nfloat threshold = 0.2f;\nsize_t target_index_count = size_t(index_count * threshold);\nfloat target_error = 1e-2f;\n\nstd::vector lod(index_count);\nfloat lod_error = 0.f;\nlod.resize(meshopt_simplify(&lod[0], indices, index_count, &vertices[0].x, vertex_count, sizeof(Vertex),\n target_index_count, target_error, /* options= */ 0, &lod_error));\n```\n\nTarget error is an approximate measure of the deviation from the original mesh using distance normalized to `[0..1]` range (e.g. `1e-2f` means that simplifier will try to maintain the error to be below 1% of the mesh extents). Note that the simplifier attempts to produce the requested number of indices at minimal error, but because of topological restrictions and error limit it is not guaranteed to reach the target index count and can stop earlier.\n\nTo disable the error limit, `target_error` can be set to `FLT_MAX`. This makes it more likely that the simplifier will reach the target index count, but it may produce a mesh that looks significantly different from the original, so using the resulting error to control viewing distance would be required. Conversely, setting `target_index_count` to 0 will simplify the input mesh as much as possible within the specified error limit; this can be useful for generating LODs that should look good at a given viewing distance.\n\nThe algorithm follows the topology of the original mesh in an attempt to preserve attribute seams, borders and overall appearance. For meshes with inconsistent topology or many seams, such as faceted meshes, it can result in simplifier getting \"stuck\" and not being able to simplify the mesh fully. Therefore it's critical that identical vertices are \"welded\" together, that is, the input vertex buffer does not contain duplicates. Additionally, it may be worthwhile to weld the vertices without taking into account vertex attributes that aren't critical and can be rebuilt later, or use \"permissive\" mode described below.\n\nAlternatively, the library provides another simplification algorithm, `meshopt_simplifySloppy`, which doesn't follow the topology of the original mesh. This means that it doesn't preserve attribute seams or borders, but it can collapse internal details that are too small to matter because it can merge mesh features that are topologically disjoint but spatially close. In general, this algorithm produces meshes with worse geometric quality and poor attribute quality compared to `meshopt_simplify`.\n\nThe algorithm can also return the resulting normalized deviation that can be used to choose the correct level of detail based on screen size or solid angle; the error can be converted to object space by multiplying by the scaling factor returned by `meshopt_simplifyScale`. For example, given a mesh with a precomputed LOD and a prescaled error, the screen-space normalized error can be computed and used for LOD selection:\n\n```c++\n// lod_factor can be 1 or can be adjusted for more or less aggressive LOD selection\nfloat d = max(0, distance(camera_position, mesh_center) - mesh_radius);\nfloat e = d * (tan(camera_fovy / 2) * 2 / screen_height); // 1px in mesh space\nbool lod_ok = e * lod_factor >= lod_error;\n```\n\nWhen a sequence of LOD meshes is generated that all use the original vertex buffer, care must be taken to order vertices optimally to not penalize mobile GPU architectures that are only capable of transforming a sequential vertex buffer range. It's recommended in this case to first optimize each LOD for vertex cache, then assemble all LODs in one large index buffer starting from the coarsest LOD (the one with fewest triangles), and call `meshopt_optimizeVertexFetch` on the final large index buffer. This will make sure that coarser LODs require a smaller vertex range and are efficient with respect to vertex fetch and transform.\n\n### Attribute-aware simplification\n\nWhile `meshopt_simplify` is aware of attribute discontinuities by default (and infers them through the supplied index buffer) and tries to preserve them, it can be useful to provide information about attribute values. This allows the simplifier to take attribute error into account which can improve shading (by using vertex normals), texture deformation (by using texture coordinates), and may be necessary to preserve vertex colors when textures are not used in the first place. This can be done by using a variant of the simplification function that takes attribute values and weight factors, `meshopt_simplifyWithAttributes`:\n\n```c++\nconst float nrm_weight = 0.5f;\nconst float attr_weights[3] = {nrm_weight, nrm_weight, nrm_weight};\n\nstd::vector lod(index_count);\nfloat lod_error = 0.f;\nlod.resize(meshopt_simplifyWithAttributes(&lod[0], indices, index_count, &vertices[0].x, vertex_count, sizeof(Vertex),\n &vertices[0].nx, sizeof(Vertex), attr_weights, 3, /* vertex_lock= */ NULL,\n target_index_count, target_error, /* options= */ 0, &lod_error));\n```\n\nThe attributes are passed as a separate buffer (in the example above it's a subset of the same vertex buffer) and should be stored as consecutive floats; attribute weights are used to control the importance of each attribute in the simplification process. For normalized attributes like normals and vertex colors, a weight around 1.0 is usually appropriate; internally, a change of `1/weight` in attribute value over a distance `d` is approximately equivalent to a change of `d` in position. Using higher weights may be appropriate to preserve attribute quality at the cost of position quality. If the attribute has a different scale (e.g. unnormalized vertex colors in [0..255] range), the weight should be divided by the scaling factor (1/255 in this example).\n\nIncluding texture coordinates in the attribute set is optional, as simplification generally preserves texture quality reasonably well by default; if included, a weight of around 10-100 is usually appropriate depending on the UV density. It's also possible to compute the weight automatically by setting it to the reciprocal average density of UVs, which can be computed as `1/sqrt(average UV area)` = `1/sqrt(sum(abs(uv area)) / triangle count)` over all triangles in the mesh, possibly scaled by a constant factor if necessary.\n\nBoth the target error and the resulting error combine positional error and attribute error, so the error can be used to control the LOD while taking attribute quality into account, assuming carefully chosen weights.\n\n### Permissive simplification\n\nBy default, `meshopt_simplify` preserves attribute discontinuities inferred from the supplied index buffer. For meshes with many seams, the simplifier can get \"stuck\" and fail to fully simplify the mesh, as it cannot collapse vertices across attribute seams. This is especially problematic for meshes with faceted normals (flat shading), as the simplifier may not be able to reduce the triangle count at all. The `meshopt_SimplifyPermissive` option relaxes these restrictions, allowing the simplifier to collapse vertices across attribute discontinuities when the resulting error is acceptable:\n\n```c++\nstd::vector lod(index_count);\nfloat lod_error = 0.f;\nlod.resize(meshopt_simplifyWithAttributes(&lod[0], indices, index_count, &vertices[0].x, vertex_count, sizeof(Vertex),\n &vertices[0].nx, sizeof(Vertex), attr_weights, 3, /* vertex_lock= */ NULL,\n target_index_count, target_error, /* options= */ meshopt_SimplifyPermissive, &lod_error));\n```\n\nTo maintain appearance, it's highly recommended to use this option together with attribute-aware simplification, as shown above, as it allows the simplifier to maintain attribute quality. In this mode, it is often desirable to selectively preserve certain attribute seams, such as UV seams or sharp creases. This can be achieved by using the `vertex_lock` array with flag `meshopt_SimplifyVertex_Protect` set for individual vertices to protect specific discontinuities. To fill this array, use `meshopt_generatePositionRemap` to create a mapping table for vertices with identical positions, and then compare each vertex to the remapped vertex to determine which attributes are different:\n\n```c++\nstd::vector remap(vertices.size());\nmeshopt_generatePositionRemap(&remap[0], &vertices[0].px, vertices.size(), sizeof(Vertex));\n\nstd::vector locks(vertices.size());\nfor (size_t i = 0; i < vertices.size(); ++i) {\n unsigned int r = remap[i];\n\n if (r != i && (vertices[r].tx != vertices[i].tx || vertices[r].ty != vertices[i].ty))\n locks[i] |= meshopt_SimplifyVertex_Protect; // protect UV seams\n}\n```\n\nThis approach provides fine-grained control over which discontinuities to preserve. The permissive mode combined with selective locking provides a balance between simplification quality and attribute preservation, and usually results in higher quality LODs for the same target triangle count (and dramatically higher quality compared to `meshopt_simplifySloppy`).\n\n> Note: this functionality is currently experimental and is subject to future improvements. Certain collapses are restricted to protect the overall topology, and attribute quality may occasionally regress.\n\n### Simplification with vertex update\n\nAll simplification functions described so far reuse the original vertex buffer and only produce a new index buffer. This means that the resulting mesh will have the same vertex positions and attributes as the original mesh; this is optimal for minimizing the memory consumption and for highly detailed meshes often provides good quality. However, for more aggressive simplification to retain visual quality, it may be necessary to adjust vertex data for optimal appearance. This can be done by using a variant of the simplification function that updates vertex positions and attributes, `meshopt_simplifyWithUpdate`:\n\n```c++\nindices.resize(meshopt_simplifyWithUpdate(&indices[0], indices.size(), &vertices[0].px, vertices.size(), sizeof(Vertex),\n &vertices[0].nx, sizeof(Vertex), attr_weights, 3, /* vertex_lock= */ NULL,\n target_index_count, target_error, /* options= */ 0, &result_error));\n```\n\nUnlike `meshopt_simplify`/`meshopt_simplifyWithAttributes`, this function updates the index buffer as well as vertex positions and attributes in place. The resulting indices still refer to the original vertex buffer; any attributes that are not passed to the simplifier can be left unchanged. However, since the original contents of `vertices` is no longer valid for rendering the original mesh, a new compact vertex/index buffer should be generated using `meshopt_optimizeVertexFetch` (after optimizing the index data with `meshopt_optimizeVertexCache`). If the original data was important, it should be copied before calling this function.\n\nSince the vertex positions are updated, this may require updating some attributes that could previously be left as-is when using the original vertex buffer. Notably, texture coordinates need to be updated to avoid texture distortion; thus it's highly recommended to include texture coordinates in the attribute data passed to the simplifier. For attributes to be updated, the corresponding attribute weight must not be zero; for texture coordinates, a weight of 1.0 is usually sufficient in this case (although a higher or mesh dependent weight could be used with this function or other functions to reduce UV stretching).\n\nAttributes that have specific constraints like normals and colors should be renormalized or clamped after the function returns new data. Attributes like bone indices/weights don't have to be updated for reasonable results (but regularization via `meshopt_SimplifyRegularize` may still be helpful to maintain deformation quality). If bone weights *are* provided as attributes, they will need to be clamped and renormalized after the update to ensure they continue to add up to 1.\n\nUsing unique vertex data for each LOD in a chain can improve visual quality, but it comes at a cost of ~doubling vertex memory used (if each LOD is using half the triangles of the previous LOD). To reduce the memory footprint, it is possible to use shared vertices with `meshopt_simplifyWithAttributes` for the first one or two LODs in the chain, and only switch to `meshopt_simplifyWithUpdate` for the remainder. In that case, similarly to the use of `meshopt_simplify` described earlier, care must be taken to optimally arrange the vertices in the original vertex buffer.\n\n### Advanced simplification\n\n`meshopt_simplify*` functions expose additional options and parameters that can be used to control the simplification process in more detail.\n\nFor basic customization, a number of options can be passed via `options` bitmask that adjust the behavior of the simplifier:\n\n- `meshopt_SimplifyLockBorder` restricts the simplifier from collapsing edges that are on the border of the mesh. This can be useful for simplifying mesh subsets independently, so that the LODs can be combined without introducing cracks.\n- `meshopt_SimplifyErrorAbsolute` changes the error metric from relative to absolute both for the input error limit as well as for the resulting error. This can be used instead of `meshopt_simplifyScale`.\n- `meshopt_SimplifySparse` improves simplification performance assuming input indices are a sparse subset of the mesh. This can be useful when simplifying small mesh subsets independently, and is intended to be used for meshlet simplification. For consistency, it is recommended to use absolute errors when sparse simplification is desired, as this flag changes the meaning of the relative errors.\n- `meshopt_SimplifyPrune` allows the simplifier to remove isolated components regardless of the topological restrictions inside the component. This is generally recommended for full-mesh simplification as it can improve quality and reduce triangle count; note that with this option, triangles connected to locked vertices may be removed as part of their component.\n- `meshopt_SimplifyRegularize` produces more regular triangle sizes and shapes during simplification, at some cost to geometric quality. This can improve geometric quality under deformation such as skinning.\n- `meshopt_SimplifyPermissive` allows collapses across attribute discontinuities, except for vertices that are tagged with `meshopt_SimplifyVertex_Protect` via `vertex_lock`.\n\nWhen using `meshopt_simplifyWithAttributes`, it is also possible to lock certain vertices by providing a `vertex_lock` array that contains a value for each vertex in the mesh, with `meshopt_SimplifyVertex_Lock` set for vertices that should not be collapsed. This can be useful to preserve certain vertices, such as the boundary of the mesh, with more control than `meshopt_SimplifyLockBorder` option provides. When using `meshopt_simplifyWithUpdate`, locking vertices (whether via `vertex_lock` or `meshopt_SimplifyLockBorder`) will also prevent the simplifier from updating their positions and attributes; this can be useful together with `meshopt_SimplifySparse` for meshlet simplification, as meshlets at one level of hierarchy can be simplified together without excessive data copying.\n\nIn addition to the `meshopt_SimplifyPrune` flag, you can explicitly prune isolated components by calling the `meshopt_simplifyPrune` function. This can be done before regular simplification or as the only step, which is useful for scenarios like isosurface cleanup. Similar to other simplification functions, the `target_error` argument controls the cutoff of component radius and is specified in relative units (e.g., `1e-2f` will remove components under 1%). If an absolute cutoff is desired, divide the parameter by the factor returned by `meshopt_simplifyScale`.\n\nSimplification currently assumes that the input mesh is using the same material for all triangles. If the mesh uses multiple materials, it is possible to split the mesh into subsets based on the material and simplify each subset independently, using `meshopt_SimplifyLockBorder` or `vertex_lock` to preserve material boundaries; however, this limits the collapses and may reduce the resulting quality. An alternative approach is to encode information about the material into the vertex buffer, ensuring that all three vertices referencing the same triangle have the same material ID; this may require duplicating vertices on the boundary between materials. After this, simplification can be performed as usual, and after simplification per-triangle material information can be computed from the vertex material IDs. There is no need to inform the simplifier of the value of the material ID: the implicit boundaries created by duplicating vertices with conflicting material IDs will be preserved automatically (unless permissive simplification is used, in which case material boundaries should be protected via `vertex_lock`). If the source mesh is already split into subsets with non-overlapping vertex indices, and permissive simplification is not used, it should be sufficient to concatenate the subsets into a single vertex/index buffer and simplify the entire mesh at once; the result can be split back into subsets after simplification.\n\nWhen generating a LOD chain, you can either re-simplify each LOD from the original mesh or use the previous LOD as the starting point for the next level. The latter approach is more efficient and produces smoother visual transitions between LOD levels while preserving mesh attributes better. With this method, resulting error values from previous levels should be accumulated for LOD selection. Additionally, consider using `meshopt_SimplifySparse` to improve performance when generating deep LOD chains.\n\n### Point cloud simplification\n\nIn addition to triangle mesh simplification, this library provides a function to simplify point clouds. The algorithm reduces the point cloud to a specified number of points while preserving the overall appearance, and can optionally take per-point colors into account:\n\n```c++\nconst float color_weight = 1;\nstd::vector indices(target_count);\nindices.resize(meshopt_simplifyPoints(&indices[0], &points[0].x, points.size(), sizeof(Point),\n &points[0].r, sizeof(Point), color_weight, target_count));\n```\n\nThe resulting indices can be used to render the simplified point cloud; to reduce the memory footprint, the point cloud can be reindexed to create an array of points from the indices.\n\n## Efficiency analyzers\n\nWhile the only way to get precise performance data is to measure performance on the target GPU, it can be valuable to measure the impact of these optimization in a GPU-independent manner. To this end, the library provides analyzers for all three major optimization routines. For each optimization there is a corresponding analyze function, like `meshopt_analyzeOverdraw`, that returns a struct with statistics.\n\n`meshopt_analyzeVertexCache` returns vertex cache statistics. The common metric to use is ACMR - average cache miss ratio, which is the ratio of the total number of vertex invocations to the triangle count. The worst-case ACMR is 3 (GPU has to process 3 vertices for each triangle); on regular grids the optimal ACMR approaches 0.5. On real meshes it usually is in [0.5..1.5] range depending on the amount of vertex splits. One other useful metric is ATVR - average transformed vertex ratio - which represents the ratio of vertex shader invocations to the total vertices, and has the best case of 1.0 regardless of mesh topology (each vertex is transformed once).\n\n`meshopt_analyzeVertexFetch` returns vertex fetch statistics. The main metric it uses is overfetch - the ratio between the number of bytes read from the vertex buffer to the total number of bytes in the vertex buffer. Assuming non-redundant vertex buffers, the best case is 1.0 - each byte is fetched once.\n\n`meshopt_analyzeOverdraw` returns overdraw statistics. The main metric it uses is overdraw - the ratio between the number of pixel shader invocations to the total number of covered pixels, as measured from several different orthographic cameras. The best case for overdraw is 1.0 - each pixel is shaded once.\n\n`meshopt_analyzeCoverage` returns coverage statistics: the ratio of covered pixels to the viewport extent from each cardinal axis. This is not an efficiency measure per se, but it can be used to measure silhouette change after simplification as well as more precise distance based culling, where the amount of view dependent coverage can be estimated by computing a dot product between the view direction and the coverage vector.\n\nNote that all analyzers use approximate models for the relevant GPU units, so the numbers you will get as the result are only a rough approximation of the actual performance.\n\n## Deinterleaved geometry\n\nAll of the examples above assume that geometry is represented as a single vertex buffer and a single index buffer. This requires storing all vertex attributes - position, normal, texture coordinate, skinning weights etc. - in a single contiguous struct. However, in some cases using multiple vertex streams may be preferable. In particular, if some passes require only positional data - such as depth pre-pass or shadow map - then it may be beneficial to split it from the rest of the vertex attributes to make sure the bandwidth use during these passes is optimal. On some mobile GPUs a position-only attribute stream also improves efficiency of tiling algorithms.\n\nMost of the functions in this library either only need the index buffer (such as vertex cache optimization) or only need positional information (such as overdraw optimization). However, several tasks require knowledge about all vertex attributes.\n\nFor indexing, `meshopt_generateVertexRemap` assumes that there's just one vertex stream; when multiple vertex streams are used, it's necessary to use `meshopt_generateVertexRemapMulti` as follows:\n\n```c++\nmeshopt_Stream streams[] = {\n {&unindexed_pos[0], sizeof(float) * 3, sizeof(float) * 3},\n {&unindexed_nrm[0], sizeof(float) * 3, sizeof(float) * 3},\n {&unindexed_uv[0], sizeof(float) * 2, sizeof(float) * 2},\n};\n\nstd::vector remap(index_count);\nsize_t vertex_count = meshopt_generateVertexRemapMulti(&remap[0], NULL, index_count, index_count, streams, sizeof(streams) / sizeof(streams[0]));\n```\n\nAfter this `meshopt_remapVertexBuffer` needs to be called once for each vertex stream to produce the correctly reindexed stream. For shadow indexing, similarly `meshopt_generateShadowIndexBufferMulti` is available as a replacement.\n\nInstead of calling `meshopt_optimizeVertexFetch` for reordering vertices in a single vertex buffer for efficiency, calling `meshopt_optimizeVertexFetchRemap` and then calling `meshopt_remapVertexBuffer` for each stream again is recommended.\n\nFinally, when compressing vertex data, `meshopt_encodeVertexBuffer` should be used on each vertex stream separately - this allows the encoder to best utilize correlation between attribute values for different vertices.\n\n## Specialized processing\n\nIn addition to the core optimization techniques, the library provides several specialized algorithms for specific rendering techniques and pipeline optimizations that require a particular configuration of vertex and index data.\n\n### Triangle strip conversion\n\nOn most hardware, indexed triangle lists are the most efficient way to drive the GPU. However, in some cases triangle strips might prove beneficial:\n\n- On some older GPUs, triangle strips may be a bit more efficient to render\n- On extremely memory constrained systems, index buffers for triangle strips could save a bit of memory\n\nThis library provides an algorithm for converting a vertex cache optimized triangle list to a triangle strip:\n\n```c++\nstd::vector strip(meshopt_stripifyBound(index_count));\nunsigned int restart_index = ~0u;\nsize_t strip_size = meshopt_stripify(&strip[0], indices, index_count, vertex_count, restart_index);\n```\n\nTypically you should expect triangle strips to have ~50-60% of indices compared to triangle lists (~1.5-1.8 indices per triangle) and have ~5% worse ACMR.\nNote that triangle strips can be stitched with or without restart index support. Using restart indices can result in ~10% smaller index buffers, but on some GPUs restart indices may result in decreased performance.\n\nTo reduce the triangle strip size further, it's recommended to use `meshopt_optimizeVertexCacheStrip` instead of `meshopt_optimizeVertexCache` when optimizing for vertex cache. This trades off some efficiency in vertex transform for smaller index buffers.\n\n### Geometry shader adjacency\n\nFor algorithms that use geometry shaders and require adjacency information, this library can generate an index buffer with adjacency data:\n\n```c++\nstd::vector adjacency(indices.size() * 2);\nmeshopt_generateAdjacencyIndexBuffer(&adjacency[0], &indices[0], indices.size(), &vertices[0].x, vertices.size(), sizeof(Vertex));\n```\n\nThis creates an index buffer suitable for rendering with triangle-with-adjacency topology, providing 3 extra vertices per triangle that represent vertices opposite to each triangle's edge. This data can be used to compute silhouettes and perform other types of local geometric processing in geometry shaders. To render the mesh with adjacency data, the index buffer should be used with `D3D_PRIMITIVE_TOPOLOGY_TRIANGLELIST_ADJ`/`VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST_WITH_ADJACENCY`/`GL_TRIANGLES_ADJACENCY` topology.\n\nNote that the use of geometry shaders may have a performance impact on some GPUs; in some cases alternative implementation strategies may be more efficient.\n\n### Tessellation with displacement mapping\n\nFor hardware tessellation with crack-free displacement mapping, this library can generate a special index buffer that supports PN-AEN tessellation:\n\n```c++\nstd::vector tess(indices.size() * 4);\nmeshopt_generateTessellationIndexBuffer(&tess[0], &indices[0], indices.size(), &vertices[0].x, vertices.size(), sizeof(Vertex));\n```\n\nThis generates a 12-vertex patch for each input triangle with the following layout:\n\n- 0, 1, 2: original triangle vertices\n- 3, 4: opposing edge for edge 0, 1\n- 5, 6: opposing edge for edge 1, 2\n- 7, 8: opposing edge for edge 2, 0\n- 9, 10, 11: dominant vertices for corners 0, 1, 2\n\nThis allows the use of hardware tessellation to implement PN-AEN and/or displacement mapping without cracks along UV seams or normal discontinuities. To render the mesh, the index buffer should be used with `D3D_PRIMITIVE_TOPOLOGY_12_CONTROL_POINT_PATCHLIST`/`VK_PRIMITIVE_TOPOLOGY_PATCH_LIST` (`patchControlPoints=12`) topology. For more details please refer to the following papers: [Crack-Free Point-Normal Triangles using Adjacent Edge Normals](https://developer.download.nvidia.com/whitepapers/2010/PN-AEN-Triangles-Whitepaper.pdf), [Tessellation on Any Budget](https://www.nvidia.com/content/pdf/gdc2011/john_mcdonald.pdf) and [My Tessellation Has Cracks!](https://developer.download.nvidia.com/assets/gamedev/files/gdc12/GDC12_DUDASH_MyTessellationHasCracks.pdf).\n\n### Visibility buffers\n\nTo render geometry into visibility buffers, access to primitive index in fragment shader is required. While it is possible to use `SV_PrimitiveID`/`gl_PrimitiveID` in the fragment shader, this can result in suboptimal performance on some GPUs (notably, AMD RDNA1 and all NVidia GPUs), and may not be supported on mobile or console hardware. Using mesh shaders to generate primitive IDs is efficient but requires hardware support that is not universally available. To work around these limitations, this library provides a way to generate a special index buffer that uses provoking vertex to encode primitive IDs:\n\n```c++\nstd::vector provoke(indices.size());\nstd::vector reorder(vertices.size() + indices.size() / 3);\nreorder.resize(meshopt_generateProvokingIndexBuffer(&provoke[0], &reorder[0], &indices[0], indices.size(), vertices.size()));\n```\n\nThis generates a special index buffer along with a reorder table that satisfies two constraints:\n\n- `provoke[3 * tri] == tri`\n- `reorder[provoke[x]]` refers to the original triangle vertices\n\nTo render the mesh with provoking vertex data, the application should use `provoke` as an index buffer and a vertex shader that passes vertex index (`SV_VertexID`/`gl_VertexIndex`) via a `flat`/`nointerpolation` attribute to the fragment shader as a primitive index, and loads vertex data manually by computing the real vertex index based on `reorder` table (`reorder[gl_VertexIndex]`). For more details please refer to [Variable Rate Shading with Visibility Buffer Rendering](https://advances.realtimerendering.com/s2024/content/Hable/Advances_SIGGRAPH_2024_VisibilityVRS-SIGGRAPH_Advances_2024.pptx); naturally, this technique does not require VRS.\n\n> Note: This assumes the provoking vertex is the first vertex of a triangle, which is true for all graphics APIs except OpenGL/WebGL. For OpenGL/WebGL, you may need to rotate each triangle (abc -> bca) in the resulting index buffer, or use the `glProvokingVertex` function (OpenGL 3.2+) or `WEBGL_provoking_vertex` extension (WebGL2) to change the provoking vertex convention. For WebGL2, this is highly recommended to avoid a variety of emulation slowdowns that happen by default if `flat` attributes are used, such as an implicit use of geometry shaders.\n\nBecause the order of indices in the resulting index buffer must be preserved exactly for the technique to work, all optimizations that reorder indices (such as vertex cache optimization) must be applied before generating the provoking index buffer. Additionally, if index compression is used, `meshopt_encodeIndexSequence` should be used instead of `meshopt_encodeIndexBuffer` to ensure that the triangles are not rotated during encoding.\n\n### Opacity micromaps\n\nWhen using hardware raytracing with alpha-tested transparency, tracing the ray requires invoking any-hit shaders for each intersected surface; this can be inefficient as it requires extra communication and synchronization between raytracing hardware and shader units. Opacity micromaps (OMMs) can significantly accelerate the tests by providing opacity masks for each triangle; this requires subdividing each triangle using a uniform grid (4^N microtriangles for subdivision level N), with each microtriangle storing 1 bit (for 2-state micromaps) or 2 bits (for 4-state micromaps) of opacity data. To minimize the memory overhead, the maps can be reused between triangles using a per-triangle OMM index buffer. This library provides algorithms to generate OMM data for a given mesh from an alpha texture; the resulting data can be used directly in Vulkan via [VK_EXT_opacity_micromap](https://docs.vulkan.org/spec/latest/chapters/raytraversal.html#ray-opacity-micromap) or in DirectX via [DXR1.2](https://github.com/microsoft/DirectX-Specs/blob/master/d3d/Raytracing.md#opacity-micromaps).\n\nGenerating opacity micromaps happens in three stages: measure (and layout), rasterize and compact. Compaction is optional but recommended, and can be performed on each mesh individually or on all meshes in the same model/scene.\n\nFirst, call `meshopt_opacityMapMeasure` to compute a subdivision level for each triangle based on its texel footprint; this also computes initial per-triangle OMM indices as it's common for triangles in the source mesh to refer to the same UVs:\n\n```c++\nconst int states = 4; // 2-state or 4-state OMMs (used after measure)\nconst int max_level = 6; // max subdivision level\nconst float target_edge = 3.0f; // target 3x3px area for each microtriangle\nstd::vector levels(indices.size() / 3);\nstd::vector sources(indices.size() / 3);\nstd::vector omm_indices(indices.size() / 3);\nsize_t omm_count = meshopt_opacityMapMeasure(&levels[0], &sources[0], &omm_indices[0], &indices[0], indices.size(),\n &vertices[0].u, vertices.size(), sizeof(Vertex), texture_width, texture_height, max_level, target_edge);\n```\n\nEach OMM entry requires separate storage which can be determined based on subdivision level and format (2-state or 4-state), and can be computed via `meshopt_opacityMapEntrySize`:\n\n```c++\nstd::vector offsets(omm_count);\nsize_t data_size = 0;\n\nfor (size_t i = 0; i < omm_count; ++i)\n{\n offsets[i] = unsigned(data_size);\n data_size += meshopt_opacityMapEntrySize(levels[i], states);\n}\n```\n\nSecond, call `meshopt_opacityMapRasterize` for each triangle to compute the opacity state per microtriangle. This can be done sequentially or in parallel; it can use the original texture resolution or a smaller mip level to balance rasterization cost vs quality. When generating 4-state micromaps, using mip 0 is recommended to produce maximally conservative output so that enabling opacity micromaps does not noticeably change the raytraced output. For 2-state micromaps, or if the original textures are much higher resolution than the micromap subdivision, smaller mips (e.g. 1 or 2) can also work well.\n\n```c++\nfor (size_t i = 0; i < omm_count; ++i)\n{\n unsigned int tri = sources[i];\n const float* uv0 = &vertices[indices[tri * 3 + 0]].u;\n const float* uv1 = &vertices[indices[tri * 3 + 1]].u;\n const float* uv2 = &vertices[indices[tri * 3 + 2]].u;\n\n // texture addressing below assumes RGBA texture input without padding; +3 points to A\n meshopt_opacityMapRasterize(&data[offsets[i]], levels[i], states, uv0, uv1, uv2,\n texture.data() + 3, 4, texture_width * 4, texture_width, texture_height);\n}\n```\n\n> Note: Opacity micromap data is sensitive to triangle corner order. If index or meshlet compression is used, to match runtime order the index data should be decompressed from the compressed representation first. Since per-triangle OMM indices use the original triangle order, it's recommended to perform OMM processing after the index order has been finalized.\n\nAfter rasterization, the OMM data *can* be used as is; however, it's typical to see redundant entries that either can be reused between different triangles, or that have consistent states for all micro-triangles, which can be represented using \"special\" indices (-4..-1) per triangle. Thus it's recommended to compact the data - if it's already laid out sequentially similarly to the example above, then just calling `meshopt_opacityMapCompact` and trimming the output arrays is sufficient for optimal output:\n\n```c++\nomm_count = meshopt_opacityMapCompact(&data[0], data_size, &levels[0], &offsets[0], omm_count, &omm_indices[0], indices.size() / 3, states);\ndata_size = (omm_count == 0) ? 0 : offsets[omm_count - 1] + meshopt_opacityMapEntrySize(levels[omm_count - 1], states);\n```\n\nAfter compaction, `levels` and `offsets` (`omm_count` entries) and `data` (`data_size` bytes) can be serialized and later passed to the raytracing runtime to build the opacity micromap structures. Often, compacting OMM data across multiple meshes can produce smaller results; in that case, all resulting OMM indices will point to a single OMM array object.\n\nAdditionally, note that while the code above works with 32-bit OMM indices, after compaction it's typical to see each mesh refer to a small section of OMM array data which can be represented using 16-bit (or, sometimes, 8-bit indices). The index data can be narrowed to a shorter type in these cases; note that when using 16-bit OMM index data, due to special indices, the index values should be in range `[0..65531]` (and `[0..251]` for 8-bit indices, assuming 4-state OMMs are used).\n\nWhen using 4-state OMMs, rasterization code produces both unknown-transparent and unknown-opaque states based on microtriangle coverage; this enables the use of forced 2-state flag during traversal for specific effects where micromap data is sufficient for reasonable quality; this is recommended for performance as this results in no any-hit invocations.\n\n## Memory management\n\nMany algorithms allocate temporary memory to store intermediate results or accelerate processing. The amount of memory allocated is a function of various input parameters such as vertex count and index count. By default memory is allocated using `operator new` and `operator delete`; if these operators are overloaded by the application, the overloads will be used instead. Alternatively it's possible to specify custom allocation/deallocation functions using `meshopt_setAllocator`, e.g.\n\n```c++\nmeshopt_setAllocator(malloc, free);\n```\n\n> Note that the library expects the allocation function to either throw in case of out-of-memory (in which case the exception will propagate to the caller) or abort, so technically the use of `malloc` above isn't safe. If you want to handle out-of-memory errors without using C++ exceptions, you can use `setjmp`/`longjmp` instead.\n\nVertex and index decoders (`meshopt_decodeVertexBuffer`, `meshopt_decodeIndexBuffer`, `meshopt_decodeIndexSequence`) do not allocate memory and work completely within the buffer space provided via arguments.\n\nAll functions have bounded stack usage that does not exceed 32 KB for any algorithms.\n\n## Experimental APIs\n\nSeveral algorithms provided by this library are marked as \"experimental\"; this status is reflected in the comments as well as the annotation `MESHOPTIMIZER_EXPERIMENTAL` for each function.\n\nAPIs that are not experimental (annotated with `MESHOPTIMIZER_API`) are considered stable, which means that library updates will not break compatibility: existing calls should compile (API compatibility), existing binaries should link (ABI compatibility), and existing behavior should not change significantly (for example, floating point parameters will have similar behavior). This does not mean that the output of the algorithms will be identical: future versions may improve the algorithms and produce different results.\n\nAPIs that *are* experimental may have their interface change, both in ways that will cause existing calls to not compile, and in ways that may compile but have significantly different behavior (e.g., changes in parameter order, meaning, valid ranges). Experimental APIs may also, in rare cases, be removed from future library versions. It is recommended to carefully read release notes when updating the library if experimental APIs are in use. Some experimental APIs may also lack documentation in this README.\n\nApplications may configure the library to change the attributes of experimental APIs, for example defining `MESHOPTIMIZER_EXPERIMENTAL` as `__attribute__((deprecated))` will emit compiler warnings when experimental APIs are used. When building a shared library with CMake, `MESHOPT_STABLE_EXPORTS` option can be set to only export stable APIs; this produces an ABI-stable shared library that can be updated without recompiling the application code.\n\nCurrently, the following APIs are experimental:\n\n- `meshopt_SimplifyPermissive` mode for `meshopt_simplify*` functions (and associated `meshopt_SimplifyVertex_*` flags)\n- `meshopt_encodeMeshlet` and `meshopt_encodeMeshletBound` functions\n- `meshopt_decodeMeshlet` and `meshopt_decodeMeshletRaw` functions\n- `meshopt_extractMeshletIndices` function\n- `meshopt_opacityMap*` functions (`meshopt_opacityMapMeasure`, `meshopt_opacityMapRasterize`, `meshopt_opacityMapCompact`, `meshopt_opacityMapEntrySize`)\n\n## License\n\nThis library is available to anybody free of charge, under the terms of [MIT License](LICENSE.md).\n\nTo honor the license agreement, please include attribution into the user-facing product documentation and/or credits, for example using this or similar text:\n\n> Uses meshoptimizer. Copyright (c) 2016-2026, Arseny Kapoulkine\n" }, { "path": "demo/ansi.c", "content": "/* This file makes sure the library can be used by C89 code */\n#include \"../src/meshoptimizer.h\"\n" }, { "path": "demo/clusterlod.h", "content": "/**\n * clusterlod - a small \"library\"/example built on top of meshoptimizer to generate cluster LOD hierarchies\n * This is intended to either be used as is, or as a reference for implementing similar functionality in your engine.\n *\n * To use this code, you need to have one source file which includes meshoptimizer.h and defines CLUSTERLOD_IMPLEMENTATION\n * before including this file. Other source files in your project can just include this file and use the provided functions.\n *\n * Copyright (C) 2016-2026, by Arseny Kapoulkine (arseny.kapoulkine@gmail.com)\n * This code is distributed under the MIT License. See notice at the end of this file.\n */\n#pragma once\n\n#include \n\nstruct clodConfig\n{\n\t// configuration of each cluster; maps to meshopt_buildMeshlets* parameters\n\tsize_t max_vertices;\n\tsize_t min_triangles;\n\tsize_t max_triangles;\n\n\t// partitioning setup; maps to meshopt_partitionClusters parameters (plus optional partition sorting)\n\t// note: partition size is the target size, not maximum; actual partitions may be up to 1/3 larger (e.g. target 24 results in maximum 32)\n\tbool partition_spatial;\n\tbool partition_sort;\n\tsize_t partition_size;\n\n\t// clusterization setup; maps to meshopt_buildMeshletsSpatial / meshopt_buildMeshletsFlex\n\tbool cluster_spatial;\n\tfloat cluster_fill_weight;\n\tfloat cluster_split_factor;\n\n\t// every level aims to reduce the number of triangles by ratio, and considers clusters that don't reach the threshold stuck\n\tfloat simplify_ratio;\n\tfloat simplify_threshold;\n\n\t// to compute the error of simplified clusters, we use the formula that combines previous accumulated error as follows:\n\t// max(previous_error * simplify_error_merge_previous, current_error) + current_error * simplify_error_merge_additive\n\tfloat simplify_error_merge_previous;\n\tfloat simplify_error_merge_additive;\n\n\t// amplify the error of clusters that go through sloppy simplification to account for appearance degradation\n\tfloat simplify_error_factor_sloppy;\n\n\t// experimental: limit error by edge length, aiming to remove subpixel triangles even if the attribute error is high\n\tfloat simplify_error_edge_limit;\n\n\t// use permissive simplification instead of regular simplification (make sure to use attribute_protect_mask if this is set!)\n\tbool simplify_permissive;\n\n\t// use permissive or sloppy simplification but only if regular simplification gets stuck\n\tbool simplify_fallback_permissive;\n\tbool simplify_fallback_sloppy;\n\n\t// use regularization during simplification to make triangle density more uniform, at some cost to overall triangle count; recommended for deformable objects\n\tbool simplify_regularize;\n\n\t// should clodCluster::bounds be computed based on the geometry of each cluster\n\tbool optimize_bounds;\n\n\t// should clodCluster::indices be optimized for locality; helps with rasterization performance and ray tracing performance in fast-build modes\n\tbool optimize_clusters;\n};\n\nstruct clodMesh\n{\n\t// input triangle indices\n\tconst unsigned int* indices;\n\tsize_t index_count;\n\n\t// total vertex count\n\tsize_t vertex_count;\n\n\t// input vertex positions; must be 3 floats per vertex\n\tconst float* vertex_positions;\n\tsize_t vertex_positions_stride;\n\n\t// input vertex attributes; used for attribute-aware simplification and permissive simplification\n\tconst float* vertex_attributes;\n\tsize_t vertex_attributes_stride;\n\n\t// input vertex locks; allows to preserve additional seams (when not using attribute_protect_mask) or lock vertices via meshopt_SimplifyVertex_* flags\n\tconst unsigned char* vertex_lock;\n\n\t// attribute weights for attribute-aware simplification; maps to meshopt_simplifyWithAttributes parameters\n\tconst float* attribute_weights;\n\tsize_t attribute_count;\n\n\t// attribute mask to flag attribute discontinuities for permissive simplification; mask (1<\nsize_t clodBuild(clodConfig config, clodMesh mesh, Output output)\n{\n\tstruct Call\n\t{\n\t\tstatic int output(void* output_context, clodGroup group, const clodCluster* clusters, size_t cluster_count)\n\t\t{\n\t\t\treturn (*static_cast(output_context))(group, clusters, cluster_count);\n\t\t}\n\t};\n\n\treturn clodBuild(config, mesh, &output, &Call::output);\n}\n#endif\n\n#ifdef CLUSTERLOD_IMPLEMENTATION\n// For reference, see the original Nanite paper:\n// Brian Karis. Nanite: A Deep Dive. 2021\n#include \n#include \n#include \n\n#include \n#include \n\nnamespace clod\n{\n\nstruct Cluster\n{\n\tsize_t vertices;\n\tstd::vector indices;\n\n\tint group;\n\tint refined;\n\n\tclodBounds bounds;\n};\n\nstatic clodBounds boundsCompute(const clodMesh& mesh, const std::vector& indices, float error)\n{\n\tmeshopt_Bounds bounds = meshopt_computeClusterBounds(&indices[0], indices.size(), mesh.vertex_positions, mesh.vertex_count, mesh.vertex_positions_stride);\n\n\tclodBounds result;\n\tresult.center[0] = bounds.center[0];\n\tresult.center[1] = bounds.center[1];\n\tresult.center[2] = bounds.center[2];\n\tresult.radius = bounds.radius;\n\tresult.error = error;\n\treturn result;\n}\n\nstatic clodBounds boundsMerge(const std::vector& clusters, const std::vector& group)\n{\n\tstd::vector bounds(group.size());\n\tfor (size_t j = 0; j < group.size(); ++j)\n\t\tbounds[j] = clusters[group[j]].bounds;\n\n\tmeshopt_Bounds merged = meshopt_computeSphereBounds(&bounds[0].center[0], bounds.size(), sizeof(clodBounds), &bounds[0].radius, sizeof(clodBounds));\n\n\tclodBounds result = {};\n\tresult.center[0] = merged.center[0];\n\tresult.center[1] = merged.center[1];\n\tresult.center[2] = merged.center[2];\n\tresult.radius = merged.radius;\n\n\t// merged bounds error must be conservative wrt cluster errors\n\tresult.error = 0.f;\n\tfor (size_t j = 0; j < group.size(); ++j)\n\t\tresult.error = std::max(result.error, clusters[group[j]].bounds.error);\n\n\treturn result;\n}\n\nstatic std::vector clusterize(const clodConfig& config, const clodMesh& mesh, const unsigned int* indices, size_t index_count)\n{\n\tsize_t max_meshlets = meshopt_buildMeshletsBound(index_count, config.max_vertices, config.min_triangles);\n\n\tstd::vector meshlets(max_meshlets);\n\tstd::vector meshlet_vertices(index_count);\n\n#if MESHOPTIMIZER_VERSION < 1000\n\tstd::vector meshlet_triangles(index_count + max_meshlets * 3); // account for 4b alignment\n#else\n\tstd::vector meshlet_triangles(index_count);\n#endif\n\n\tif (config.cluster_spatial)\n\t\tmeshlets.resize(meshopt_buildMeshletsSpatial(meshlets.data(), meshlet_vertices.data(), meshlet_triangles.data(), indices, index_count,\n\t\t mesh.vertex_positions, mesh.vertex_count, mesh.vertex_positions_stride,\n\t\t config.max_vertices, config.min_triangles, config.max_triangles, config.cluster_fill_weight));\n\telse\n\t\tmeshlets.resize(meshopt_buildMeshletsFlex(meshlets.data(), meshlet_vertices.data(), meshlet_triangles.data(), indices, index_count,\n\t\t mesh.vertex_positions, mesh.vertex_count, mesh.vertex_positions_stride,\n\t\t config.max_vertices, config.min_triangles, config.max_triangles, 0.f, config.cluster_split_factor));\n\n\tstd::vector clusters(meshlets.size());\n\n\tfor (size_t i = 0; i < meshlets.size(); ++i)\n\t{\n\t\tconst meshopt_Meshlet& meshlet = meshlets[i];\n\n\t\tif (config.optimize_clusters)\n\t\t\tmeshopt_optimizeMeshlet(&meshlet_vertices[meshlet.vertex_offset], &meshlet_triangles[meshlet.triangle_offset], meshlet.triangle_count, meshlet.vertex_count);\n\n\t\tclusters[i].vertices = meshlet.vertex_count;\n\n\t\t// note: we discard meshlet-local indices; they can be recovered by the caller using clodLocalIndices\n\t\tclusters[i].indices.resize(meshlet.triangle_count * 3);\n\t\tfor (size_t j = 0; j < meshlet.triangle_count * 3; ++j)\n\t\t\tclusters[i].indices[j] = meshlet_vertices[meshlet.vertex_offset + meshlet_triangles[meshlet.triangle_offset + j]];\n\n\t\tclusters[i].group = -1;\n\t\tclusters[i].refined = -1;\n\t}\n\n\treturn clusters;\n}\n\nstatic std::vector > partition(const clodConfig& config, const clodMesh& mesh, const std::vector& clusters, const std::vector& pending, const std::vector& remap)\n{\n\tif (pending.size() <= config.partition_size)\n\t\treturn {pending};\n\n\tstd::vector cluster_indices;\n\tstd::vector cluster_counts(pending.size());\n\n\t// copy cluster index data into a flat array for partitioning\n\tsize_t total_index_count = 0;\n\tfor (size_t i = 0; i < pending.size(); ++i)\n\t\ttotal_index_count += clusters[pending[i]].indices.size();\n\n\tcluster_indices.reserve(total_index_count);\n\n\tfor (size_t i = 0; i < pending.size(); ++i)\n\t{\n\t\tconst Cluster& cluster = clusters[pending[i]];\n\n\t\tcluster_counts[i] = unsigned(cluster.indices.size());\n\n\t\tfor (size_t j = 0; j < cluster.indices.size(); ++j)\n\t\t\tcluster_indices.push_back(remap[cluster.indices[j]]);\n\t}\n\n\t// partition clusters into groups; the output is a partition id per cluster\n\tstd::vector cluster_part(pending.size());\n\tsize_t partition_count = meshopt_partitionClusters(&cluster_part[0], &cluster_indices[0], cluster_indices.size(), &cluster_counts[0], cluster_counts.size(),\n\t config.partition_spatial ? mesh.vertex_positions : NULL, remap.size(), mesh.vertex_positions_stride, config.partition_size);\n\n\t// preallocate partitions for worst case\n\tstd::vector > partitions(partition_count);\n\tfor (size_t i = 0; i < partition_count; ++i)\n\t\tpartitions[i].reserve(config.partition_size + config.partition_size / 3);\n\n\tstd::vector partition_remap;\n\n\tif (config.partition_sort)\n\t{\n\t\t// compute partition points for sorting; any representative point will do, we use last cluster center for simplicity\n\t\tstd::vector partition_point(partition_count * 3);\n\t\tfor (size_t i = 0; i < pending.size(); ++i)\n\t\t\tmemcpy(&partition_point[cluster_part[i] * 3], clusters[pending[i]].bounds.center, sizeof(float) * 3);\n\n\t\t// sort partitions spatially; the output is a remap table from old index (partition id) to new index\n\t\tpartition_remap.resize(partition_count);\n\t\tmeshopt_spatialSortRemap(partition_remap.data(), partition_point.data(), partition_count, sizeof(float) * 3);\n\t}\n\n\t// distribute clusters into partitions, applying spatial order if requested\n\tfor (size_t i = 0; i < pending.size(); ++i)\n\t\tpartitions[partition_remap.empty() ? cluster_part[i] : partition_remap[cluster_part[i]]].push_back(pending[i]);\n\n\treturn partitions;\n}\n\nstatic void lockBoundary(std::vector& locks, const std::vector >& groups, const std::vector& clusters, const std::vector& remap, const unsigned char* vertex_lock)\n{\n\t// for each remapped vertex, use bit 7 as temporary storage to indicate that the vertex has been used by a different group previously\n\tfor (size_t i = 0; i < locks.size(); ++i)\n\t\tlocks[i] &= ~((1 << 0) | (1 << 7));\n\n\tfor (size_t i = 0; i < groups.size(); ++i)\n\t{\n\t\t// mark all remapped vertices as locked if seen by a prior group\n\t\tfor (size_t j = 0; j < groups[i].size(); ++j)\n\t\t{\n\t\t\tconst Cluster& cluster = clusters[groups[i][j]];\n\n\t\t\tfor (size_t k = 0; k < cluster.indices.size(); ++k)\n\t\t\t{\n\t\t\t\tunsigned int v = cluster.indices[k];\n\t\t\t\tunsigned int r = remap[v];\n\n\t\t\t\tlocks[r] |= locks[r] >> 7;\n\t\t\t}\n\t\t}\n\n\t\t// mark all remapped vertices as seen\n\t\tfor (size_t j = 0; j < groups[i].size(); ++j)\n\t\t{\n\t\t\tconst Cluster& cluster = clusters[groups[i][j]];\n\n\t\t\tfor (size_t k = 0; k < cluster.indices.size(); ++k)\n\t\t\t{\n\t\t\t\tunsigned int v = cluster.indices[k];\n\t\t\t\tunsigned int r = remap[v];\n\n\t\t\t\tlocks[r] |= 1 << 7;\n\t\t\t}\n\t\t}\n\t}\n\n\tfor (size_t i = 0; i < locks.size(); ++i)\n\t{\n\t\tunsigned int r = remap[i];\n\n\t\t// consistently lock all vertices with the same position; keep protect bit if set\n\t\tlocks[i] = (locks[r] & 1) | (locks[i] & meshopt_SimplifyVertex_Protect);\n\n\t\tif (vertex_lock)\n\t\t\tlocks[i] |= vertex_lock[i];\n\t}\n}\n\nstruct SloppyVertex\n{\n\tfloat x, y, z;\n\tunsigned int id;\n};\n\nstatic void simplifyFallback(std::vector& lod, const clodMesh& mesh, const std::vector& indices, const std::vector& locks, size_t target_count, float* error)\n{\n\tstd::vector subset(indices.size());\n\tstd::vector subset_locks(indices.size());\n\n\tlod.resize(indices.size());\n\n\tsize_t positions_stride = mesh.vertex_positions_stride / sizeof(float);\n\n\t// deindex the mesh subset to avoid calling simplifySloppy on the entire vertex buffer (which is prohibitively expensive without sparsity)\n\tfor (size_t i = 0; i < indices.size(); ++i)\n\t{\n\t\tunsigned int v = indices[i];\n\t\tassert(v < mesh.vertex_count);\n\n\t\tsubset[i].x = mesh.vertex_positions[v * positions_stride + 0];\n\t\tsubset[i].y = mesh.vertex_positions[v * positions_stride + 1];\n\t\tsubset[i].z = mesh.vertex_positions[v * positions_stride + 2];\n\t\tsubset[i].id = v;\n\n\t\tsubset_locks[i] = locks[v];\n\t\tlod[i] = unsigned(i);\n\t}\n\n\tlod.resize(meshopt_simplifySloppy(&lod[0], &lod[0], lod.size(), &subset[0].x, subset.size(), sizeof(SloppyVertex), subset_locks.data(), target_count, FLT_MAX, error));\n\n\t// convert error to absolute\n\t*error *= meshopt_simplifyScale(&subset[0].x, subset.size(), sizeof(SloppyVertex));\n\n\t// restore original vertex indices\n\tfor (size_t i = 0; i < lod.size(); ++i)\n\t\tlod[i] = subset[lod[i]].id;\n}\n\nstatic std::vector simplify(const clodConfig& config, const clodMesh& mesh, const std::vector& indices, const std::vector& locks, size_t target_count, float* error)\n{\n\tif (target_count > indices.size())\n\t\treturn indices;\n\n\tstd::vector lod(indices.size());\n\n\tunsigned int options = meshopt_SimplifySparse | meshopt_SimplifyErrorAbsolute | (config.simplify_permissive ? meshopt_SimplifyPermissive : 0) | (config.simplify_regularize ? meshopt_SimplifyRegularize : 0);\n\n\tlod.resize(meshopt_simplifyWithAttributes(&lod[0], &indices[0], indices.size(),\n\t mesh.vertex_positions, mesh.vertex_count, mesh.vertex_positions_stride,\n\t mesh.vertex_attributes, mesh.vertex_attributes_stride, mesh.attribute_weights, mesh.attribute_count,\n\t &locks[0], target_count, FLT_MAX, options, error));\n\n\tif (lod.size() > target_count && config.simplify_fallback_permissive && !config.simplify_permissive)\n\t\tlod.resize(meshopt_simplifyWithAttributes(&lod[0], &indices[0], indices.size(),\n\t\t mesh.vertex_positions, mesh.vertex_count, mesh.vertex_positions_stride,\n\t\t mesh.vertex_attributes, mesh.vertex_attributes_stride, mesh.attribute_weights, mesh.attribute_count,\n\t\t &locks[0], target_count, FLT_MAX, options | meshopt_SimplifyPermissive, error));\n\n\t// while it's possible to call simplifySloppy directly, it doesn't support sparsity or absolute error, so we need to do some extra work\n\tif (lod.size() > target_count && config.simplify_fallback_sloppy)\n\t{\n\t\tsimplifyFallback(lod, mesh, indices, locks, target_count, error);\n\t\t*error *= config.simplify_error_factor_sloppy; // scale error up to account for appearance degradation\n\t}\n\n\t// optionally limit error by edge length, aiming to remove subpixel triangles even if the attribute error is high\n\tif (config.simplify_error_edge_limit > 0)\n\t{\n\t\tfloat max_edge_sq = 0;\n\n\t\tfor (size_t i = 0; i < indices.size(); i += 3)\n\t\t{\n\t\t\tunsigned int a = indices[i + 0], b = indices[i + 1], c = indices[i + 2];\n\t\t\tassert(a < mesh.vertex_count && b < mesh.vertex_count && c < mesh.vertex_count);\n\n\t\t\tconst float* va = &mesh.vertex_positions[a * (mesh.vertex_positions_stride / sizeof(float))];\n\t\t\tconst float* vb = &mesh.vertex_positions[b * (mesh.vertex_positions_stride / sizeof(float))];\n\t\t\tconst float* vc = &mesh.vertex_positions[c * (mesh.vertex_positions_stride / sizeof(float))];\n\n\t\t\t// compute squared edge lengths\n\t\t\tfloat eab = (va[0] - vb[0]) * (va[0] - vb[0]) + (va[1] - vb[1]) * (va[1] - vb[1]) + (va[2] - vb[2]) * (va[2] - vb[2]);\n\t\t\tfloat eac = (va[0] - vc[0]) * (va[0] - vc[0]) + (va[1] - vc[1]) * (va[1] - vc[1]) + (va[2] - vc[2]) * (va[2] - vc[2]);\n\t\t\tfloat ebc = (vb[0] - vc[0]) * (vb[0] - vc[0]) + (vb[1] - vc[1]) * (vb[1] - vc[1]) + (vb[2] - vc[2]) * (vb[2] - vc[2]);\n\n\t\t\tfloat emax = std::max(std::max(eab, eac), ebc);\n\t\t\tfloat emin = std::min(std::min(eab, eac), ebc);\n\n\t\t\t// we prefer using min edge length to reduce the number of triangles <1px thick, but need some stopgap for thin and long triangles like wires\n\t\t\tmax_edge_sq = std::max(max_edge_sq, std::max(emin, emax / 4));\n\t\t}\n\n\t\t// adjust the error to limit it for dense clusters based on edge lengths\n\t\t*error = std::min(*error, sqrtf(max_edge_sq) * config.simplify_error_edge_limit);\n\t}\n\n\treturn lod;\n}\n\nstatic int outputGroup(const clodConfig& config, const clodMesh& mesh, const std::vector& clusters, const std::vector& group, const clodBounds& simplified, int depth, void* output_context, clodOutput output_callback)\n{\n\tstd::vector group_clusters(group.size());\n\n\tfor (size_t i = 0; i < group.size(); ++i)\n\t{\n\t\tconst Cluster& cluster = clusters[group[i]];\n\t\tclodCluster& result = group_clusters[i];\n\n\t\tresult.refined = cluster.refined;\n\t\tresult.bounds = (config.optimize_bounds && cluster.refined != -1) ? boundsCompute(mesh, cluster.indices, cluster.bounds.error) : cluster.bounds;\n\t\tresult.indices = cluster.indices.data();\n\t\tresult.index_count = cluster.indices.size();\n\t\tresult.vertex_count = cluster.vertices;\n\t}\n\n\treturn output_callback ? output_callback(output_context, {depth, simplified}, group_clusters.data(), group_clusters.size()) : -1;\n}\n\n} // namespace clod\n\nclodConfig clodDefaultConfig(size_t max_triangles)\n{\n\tassert(max_triangles >= 4 && max_triangles <= 256);\n\n\tclodConfig config = {};\n\tconfig.max_vertices = max_triangles;\n\tconfig.min_triangles = max_triangles / 3;\n\tconfig.max_triangles = max_triangles;\n\n#if MESHOPTIMIZER_VERSION < 1000\n\tconfig.min_triangles &= ~3; // account for 4b alignment\n#endif\n\n\tconfig.partition_spatial = true;\n\tconfig.partition_size = 16;\n\n\tconfig.cluster_spatial = false;\n\tconfig.cluster_split_factor = 2.0f;\n\n\tconfig.optimize_clusters = true;\n\n\tconfig.simplify_ratio = 0.5f;\n\tconfig.simplify_threshold = 0.85f;\n\tconfig.simplify_error_merge_previous = 1.0f;\n\tconfig.simplify_error_factor_sloppy = 2.0f;\n\tconfig.simplify_permissive = true;\n\tconfig.simplify_fallback_permissive = false; // note: by default we run in permissive mode, but it's also possible to disable that and use it only as a fallback\n\tconfig.simplify_fallback_sloppy = true;\n\n\treturn config;\n}\n\nclodConfig clodDefaultConfigRT(size_t max_triangles)\n{\n\tclodConfig config = clodDefaultConfig(max_triangles);\n\n\t// for ray tracing, we may want smaller clusters when that improves BVH quality further; for maximum ray tracing performance this could be reduced even further\n\tconfig.min_triangles = max_triangles / 4;\n\n\t// by default, we use larger max_vertices for RT; the vertex count is not important for ray tracing performance, and this helps improve cluster utilization\n\tconfig.max_vertices = std::min(size_t(256), max_triangles * 2);\n\n\tconfig.cluster_spatial = true;\n\tconfig.cluster_fill_weight = 0.5f;\n\n\treturn config;\n}\n\nsize_t clodBuild(clodConfig config, clodMesh mesh, void* output_context, clodOutput output_callback)\n{\n\tusing namespace clod;\n\n\tassert(mesh.vertex_attributes_stride % sizeof(float) == 0);\n\tassert(mesh.attribute_count * sizeof(float) <= mesh.vertex_attributes_stride);\n\tassert(mesh.attribute_protect_mask < (1u << (mesh.vertex_attributes_stride / sizeof(float))));\n\n\tstd::vector locks(mesh.vertex_count);\n\n\t// for cluster connectivity, we need a position-only remap that maps vertices with the same position to the same index\n\tstd::vector remap(mesh.vertex_count);\n\tmeshopt_generatePositionRemap(&remap[0], mesh.vertex_positions, mesh.vertex_count, mesh.vertex_positions_stride);\n\n\t// set up protect bits on UV seams for permissive mode\n\tif (mesh.attribute_protect_mask)\n\t{\n\t\tsize_t max_attributes = mesh.vertex_attributes_stride / sizeof(float);\n\n\t\tfor (size_t i = 0; i < mesh.vertex_count; ++i)\n\t\t{\n\t\t\tunsigned int r = remap[i]; // canonical vertex with the same position\n\n\t\t\tfor (size_t j = 0; j < max_attributes; ++j)\n\t\t\t\tif (r != i && (mesh.attribute_protect_mask & (1u << j)) && mesh.vertex_attributes[i * max_attributes + j] != mesh.vertex_attributes[r * max_attributes + j])\n\t\t\t\t\tlocks[i] |= meshopt_SimplifyVertex_Protect;\n\t\t}\n\t}\n\n\t// initial clusterization splits the original mesh\n\tstd::vector clusters = clusterize(config, mesh, mesh.indices, mesh.index_count);\n\n\t// compute initial precise bounds; subsequent bounds will be using group-merged bounds\n\tfor (Cluster& cluster : clusters)\n\t\tcluster.bounds = boundsCompute(mesh, cluster.indices, 0.f);\n\n\tstd::vector pending(clusters.size());\n\tfor (size_t i = 0; i < clusters.size(); ++i)\n\t\tpending[i] = int(i);\n\n\tint depth = 0;\n\n\t// merge and simplify clusters until we can't merge anymore\n\twhile (pending.size() > 1)\n\t{\n\t\tstd::vector > groups = partition(config, mesh, clusters, pending, remap);\n\n\t\tpending.clear();\n\n\t\t// mark boundaries between groups with a lock bit to avoid gaps in simplified result\n\t\tlockBoundary(locks, groups, clusters, remap, mesh.vertex_lock);\n\n\t\t// every group needs to be simplified now\n\t\tfor (size_t i = 0; i < groups.size(); ++i)\n\t\t{\n\t\t\tstd::vector merged;\n\t\t\tmerged.reserve(groups[i].size() * config.max_triangles * 3);\n\t\t\tfor (size_t j = 0; j < groups[i].size(); ++j)\n\t\t\t\tmerged.insert(merged.end(), clusters[groups[i][j]].indices.begin(), clusters[groups[i][j]].indices.end());\n\n\t\t\tsize_t target_size = size_t((merged.size() / 3) * config.simplify_ratio) * 3;\n\n\t\t\t// enforce bounds and error monotonicity\n\t\t\t// note: it is incorrect to use the precise bounds of the merged or simplified mesh, because this may violate monotonicity\n\t\t\tclodBounds bounds = boundsMerge(clusters, groups[i]);\n\n\t\t\tfloat error = 0.f;\n\t\t\tstd::vector simplified = simplify(config, mesh, merged, locks, target_size, &error);\n\t\t\tif (simplified.size() > merged.size() * config.simplify_threshold)\n\t\t\t{\n\t\t\t\tbounds.error = FLT_MAX; // terminal group, won't simplify further\n\t\t\t\toutputGroup(config, mesh, clusters, groups[i], bounds, depth, output_context, output_callback);\n\t\t\t\tcontinue; // simplification is stuck; abandon the merge\n\t\t\t}\n\n\t\t\t// enforce error monotonicity (with an optional hierarchical factor to separate transitions more)\n\t\t\tbounds.error = std::max(bounds.error * config.simplify_error_merge_previous, error) + error * config.simplify_error_merge_additive;\n\n\t\t\t// output the new group with all clusters; the resulting id will be recorded in new clusters as clodCluster::refined\n\t\t\tint refined = outputGroup(config, mesh, clusters, groups[i], bounds, depth, output_context, output_callback);\n\n\t\t\t// discard clusters from the group - they won't be used anymore\n\t\t\tfor (size_t j = 0; j < groups[i].size(); ++j)\n\t\t\t\tclusters[groups[i][j]].indices = std::vector();\n\n\t\t\tstd::vector split = clusterize(config, mesh, simplified.data(), simplified.size());\n\n\t\t\tfor (Cluster& cluster : split)\n\t\t\t{\n\t\t\t\tcluster.refined = refined;\n\n\t\t\t\t// update cluster group bounds to the group-merged bounds; this ensures that we compute the group bounds for whatever group this cluster will be part of conservatively\n\t\t\t\tcluster.bounds = bounds;\n\n\t\t\t\t// enqueue new cluster for further processing\n\t\t\t\tclusters.push_back(std::move(cluster));\n\t\t\t\tpending.push_back(int(clusters.size()) - 1);\n\t\t\t}\n\t\t}\n\n\t\tdepth++;\n\t}\n\n\tif (pending.size())\n\t{\n\t\tassert(pending.size() == 1);\n\t\tconst Cluster& cluster = clusters[pending[0]];\n\n\t\tclodBounds bounds = cluster.bounds;\n\t\tbounds.error = FLT_MAX; // terminal group, won't simplify further\n\n\t\toutputGroup(config, mesh, clusters, pending, bounds, depth, output_context, output_callback);\n\t}\n\n\treturn clusters.size();\n}\n\nsize_t clodLocalIndices(unsigned int* vertices, unsigned char* triangles, const unsigned int* indices, size_t index_count)\n{\n\treturn meshopt_extractMeshletIndices(vertices, triangles, indices, index_count);\n}\n#endif\n\n/**\n * Copyright (c) 2016-2026 Arseny Kapoulkine\n *\n * Permission is hereby granted, free of charge, to any person\n * obtaining a copy of this software and associated documentation\n * files (the \"Software\"), to deal in the Software without\n * restriction, including without limitation the rights to use,\n * copy, modify, merge, publish, distribute, sublicense, and/or sell\n * copies of the Software, and to permit persons to whom the\n * Software is furnished to do so, subject to the following\n * conditions:\n *\n * The above copyright notice and this permission notice shall be\n * included in all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND,\n * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES\n * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND\n * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT\n * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,\n * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR\n * OTHER DEALINGS IN THE SOFTWARE.\n */\n" }, { "path": "demo/index.html", "content": "\n\n\t\n\t\tmeshoptimizer - demo\n\t\t\n\t\t\n\t\t\n\n\t\t\n\t\t\n\t\n\n\t\n\t\t
\n\t\t\tmeshoptimizer\n\t\t
\n\n\t\t\n\t\n\n" }, { "path": "demo/main.cpp", "content": "#include \"../src/meshoptimizer.h\"\n\n#include \n#include \n#include \n#include \n#include \n\n#include \n\n#include \"../extern/fast_obj.h\"\n\n#define SDEFL_IMPLEMENTATION\n#include \"../extern/sdefl.h\"\n\n// This file uses assert() to verify algorithm correctness\n#undef NDEBUG\n#include \n\n#if defined(__linux__)\ndouble timestamp()\n{\n\ttimespec ts;\n\tclock_gettime(CLOCK_MONOTONIC, &ts);\n\treturn double(ts.tv_sec) + 1e-9 * double(ts.tv_nsec);\n}\n#elif defined(_WIN32)\nstruct LARGE_INTEGER\n{\n\t__int64 QuadPart;\n};\nextern \"C\" __declspec(dllimport) int __stdcall QueryPerformanceCounter(LARGE_INTEGER* lpPerformanceCount);\nextern \"C\" __declspec(dllimport) int __stdcall QueryPerformanceFrequency(LARGE_INTEGER* lpFrequency);\n\ndouble timestamp()\n{\n\tLARGE_INTEGER freq, counter;\n\tQueryPerformanceFrequency(&freq);\n\tQueryPerformanceCounter(&counter);\n\treturn double(counter.QuadPart) / double(freq.QuadPart);\n}\n#else\ndouble timestamp()\n{\n\treturn double(clock()) / double(CLOCKS_PER_SEC);\n}\n#endif\n\nstruct Vertex\n{\n\tfloat px, py, pz;\n\tfloat nx, ny, nz;\n\tfloat tx, ty;\n};\n\nstruct Mesh\n{\n\tstd::vector vertices;\n\tstd::vector indices;\n};\n\nunion Triangle\n{\n\tVertex v[3];\n\tchar data[sizeof(Vertex) * 3];\n};\n\nMesh parseObj(const char* path, double& reindex)\n{\n\tfastObjMesh* obj = fast_obj_read(path);\n\tif (!obj)\n\t{\n\t\tprintf(\"Error loading %s: file not found\\n\", path);\n\t\treturn Mesh();\n\t}\n\n\tsize_t total_indices = 0;\n\n\tfor (unsigned int i = 0; i < obj->face_count; ++i)\n\t\tif (obj->face_vertices[i] > 2)\n\t\t\ttotal_indices += 3 * (obj->face_vertices[i] - 2);\n\n\tstd::vector vertices(total_indices);\n\n\tsize_t vertex_offset = 0;\n\tsize_t index_offset = 0;\n\n\tfor (unsigned int i = 0; i < obj->face_count; ++i)\n\t{\n\t\tif (obj->face_vertices[i] <= 2)\n\t\t\tcontinue;\n\n\t\tfor (unsigned int j = 0; j < obj->face_vertices[i]; ++j)\n\t\t{\n\t\t\tfastObjIndex gi = obj->indices[index_offset + j];\n\n\t\t\tVertex v =\n\t\t\t {\n\t\t\t obj->positions[gi.p * 3 + 0],\n\t\t\t obj->positions[gi.p * 3 + 1],\n\t\t\t obj->positions[gi.p * 3 + 2],\n\t\t\t obj->normals[gi.n * 3 + 0],\n\t\t\t obj->normals[gi.n * 3 + 1],\n\t\t\t obj->normals[gi.n * 3 + 2],\n\t\t\t obj->texcoords[gi.t * 2 + 0],\n\t\t\t obj->texcoords[gi.t * 2 + 1],\n\t\t\t };\n\n\t\t\t// triangulate polygon on the fly; offset-3 is always the first polygon vertex\n\t\t\tif (j >= 3)\n\t\t\t{\n\t\t\t\tvertices[vertex_offset + 0] = vertices[vertex_offset - 3];\n\t\t\t\tvertices[vertex_offset + 1] = vertices[vertex_offset - 1];\n\t\t\t\tvertex_offset += 2;\n\t\t\t}\n\n\t\t\tvertices[vertex_offset] = v;\n\t\t\tvertex_offset++;\n\t\t}\n\n\t\tindex_offset += obj->face_vertices[i];\n\t}\n\n\tfast_obj_destroy(obj);\n\n\treindex = timestamp();\n\n\tMesh result;\n\n\t// empty mesh\n\tif (total_indices == 0)\n\t\treturn result;\n\n\tstd::vector remap(total_indices);\n\n\tsize_t total_vertices = meshopt_generateVertexRemap(&remap[0], NULL, total_indices, &vertices[0], total_indices, sizeof(Vertex));\n\n\tresult.indices.resize(total_indices);\n\tmeshopt_remapIndexBuffer(&result.indices[0], NULL, total_indices, &remap[0]);\n\n\tresult.vertices.resize(total_vertices);\n\tmeshopt_remapVertexBuffer(&result.vertices[0], &vertices[0], total_indices, sizeof(Vertex), &remap[0]);\n\n\treturn result;\n}\n\nvoid dumpObj(const std::vector& vertices, const std::vector& indices, bool recomputeNormals = false)\n{\n\tstd::vector normals;\n\n\tif (recomputeNormals)\n\t{\n\t\tnormals.resize(vertices.size() * 3);\n\n\t\tfor (size_t i = 0; i < indices.size(); i += 3)\n\t\t{\n\t\t\tunsigned int a = indices[i], b = indices[i + 1], c = indices[i + 2];\n\n\t\t\tconst Vertex& va = vertices[a];\n\t\t\tconst Vertex& vb = vertices[b];\n\t\t\tconst Vertex& vc = vertices[c];\n\n\t\t\tfloat nx = (vb.py - va.py) * (vc.pz - va.pz) - (vb.pz - va.pz) * (vc.py - va.py);\n\t\t\tfloat ny = (vb.pz - va.pz) * (vc.px - va.px) - (vb.px - va.px) * (vc.pz - va.pz);\n\t\t\tfloat nz = (vb.px - va.px) * (vc.py - va.py) - (vb.py - va.py) * (vc.px - va.px);\n\n\t\t\tfor (int k = 0; k < 3; ++k)\n\t\t\t{\n\t\t\t\tunsigned int index = indices[i + k];\n\n\t\t\t\tnormals[index * 3 + 0] += nx;\n\t\t\t\tnormals[index * 3 + 1] += ny;\n\t\t\t\tnormals[index * 3 + 2] += nz;\n\t\t\t}\n\t\t}\n\t}\n\n\tfor (size_t i = 0; i < vertices.size(); ++i)\n\t{\n\t\tconst Vertex& v = vertices[i];\n\n\t\tfloat nx = v.nx, ny = v.ny, nz = v.nz;\n\n\t\tif (recomputeNormals)\n\t\t{\n\t\t\tnx = normals[i * 3 + 0];\n\t\t\tny = normals[i * 3 + 1];\n\t\t\tnz = normals[i * 3 + 2];\n\n\t\t\tfloat l = sqrtf(nx * nx + ny * ny + nz * nz);\n\t\t\tfloat s = l == 0.f ? 0.f : 1.f / l;\n\n\t\t\tnx *= s;\n\t\t\tny *= s;\n\t\t\tnz *= s;\n\t\t}\n\n\t\tfprintf(stderr, \"v %f %f %f\\n\", v.px, v.py, v.pz);\n\t\tfprintf(stderr, \"vn %f %f %f\\n\", nx, ny, nz);\n\t}\n\n\tfor (size_t i = 0; i < indices.size(); i += 3)\n\t{\n\t\tunsigned int a = indices[i], b = indices[i + 1], c = indices[i + 2];\n\n\t\tfprintf(stderr, \"f %d//%d %d//%d %d//%d\\n\", a + 1, a + 1, b + 1, b + 1, c + 1, c + 1);\n\t}\n}\n\nvoid dumpObj(const char* section, const std::vector& indices)\n{\n\tfprintf(stderr, \"o %s\\n\", section);\n\n\tfor (size_t j = 0; j < indices.size(); j += 3)\n\t{\n\t\tunsigned int a = indices[j], b = indices[j + 1], c = indices[j + 2];\n\n\t\tfprintf(stderr, \"f %d//%d %d//%d %d//%d\\n\", a + 1, a + 1, b + 1, b + 1, c + 1, c + 1);\n\t}\n}\n\nstruct PackedVertex\n{\n\tunsigned short px, py, pz;\n\tunsigned short pw; // padding to 4b boundary\n\tsigned char nx, ny, nz, nw;\n\tunsigned short tx, ty;\n};\n\nvoid packMesh(std::vector& pv, const std::vector& vertices)\n{\n\tfor (size_t i = 0; i < vertices.size(); ++i)\n\t{\n\t\tconst Vertex& vi = vertices[i];\n\t\tPackedVertex& pvi = pv[i];\n\n\t\tpvi.px = meshopt_quantizeHalf(vi.px);\n\t\tpvi.py = meshopt_quantizeHalf(vi.py);\n\t\tpvi.pz = meshopt_quantizeHalf(vi.pz);\n\t\tpvi.pw = 0;\n\n\t\tpvi.nx = char(meshopt_quantizeSnorm(vi.nx, 8));\n\t\tpvi.ny = char(meshopt_quantizeSnorm(vi.ny, 8));\n\t\tpvi.nz = char(meshopt_quantizeSnorm(vi.nz, 8));\n\t\tpvi.nw = 0;\n\n\t\tpvi.tx = meshopt_quantizeHalf(vi.tx);\n\t\tpvi.ty = meshopt_quantizeHalf(vi.ty);\n\t}\n}\n\nstruct PackedVertexOct\n{\n\tunsigned short px, py, pz;\n\tsigned char nu, nv; // octahedron encoded normal, aliases .pw\n\tunsigned short tx, ty;\n};\n\nvoid packMesh(std::vector& pv, const std::vector& vertices)\n{\n\tfor (size_t i = 0; i < vertices.size(); ++i)\n\t{\n\t\tconst Vertex& vi = vertices[i];\n\t\tPackedVertexOct& pvi = pv[i];\n\n\t\tpvi.px = meshopt_quantizeHalf(vi.px);\n\t\tpvi.py = meshopt_quantizeHalf(vi.py);\n\t\tpvi.pz = meshopt_quantizeHalf(vi.pz);\n\n\t\tfloat nsum = fabsf(vi.nx) + fabsf(vi.ny) + fabsf(vi.nz);\n\t\tfloat nx = vi.nx / nsum;\n\t\tfloat ny = vi.ny / nsum;\n\t\tfloat nz = vi.nz;\n\n\t\tfloat nu = nz >= 0 ? nx : (1 - fabsf(ny)) * (nx >= 0 ? 1 : -1);\n\t\tfloat nv = nz >= 0 ? ny : (1 - fabsf(nx)) * (ny >= 0 ? 1 : -1);\n\n\t\tpvi.nu = char(meshopt_quantizeSnorm(nu, 8));\n\t\tpvi.nv = char(meshopt_quantizeSnorm(nv, 8));\n\n\t\tpvi.tx = meshopt_quantizeHalf(vi.tx);\n\t\tpvi.ty = meshopt_quantizeHalf(vi.ty);\n\t}\n}\n\nvoid simplify(const Mesh& mesh, float threshold = 0.2f, unsigned int options = 0)\n{\n\tMesh lod;\n\n\tdouble start = timestamp();\n\n\tsize_t target_index_count = size_t(mesh.indices.size() * threshold);\n\tfloat target_error = 1e-2f;\n\tfloat result_error = 0;\n\n\tlod.indices.resize(mesh.indices.size()); // note: simplify needs space for index_count elements in the destination array, not target_index_count\n\tlod.indices.resize(meshopt_simplify(&lod.indices[0], &mesh.indices[0], mesh.indices.size(), &mesh.vertices[0].px, mesh.vertices.size(), sizeof(Vertex), target_index_count, target_error, options, &result_error));\n\n\tlod.vertices.resize(lod.indices.size() < mesh.vertices.size() ? lod.indices.size() : mesh.vertices.size()); // note: this is just to reduce the cost of resize()\n\tlod.vertices.resize(meshopt_optimizeVertexFetch(&lod.vertices[0], &lod.indices[0], lod.indices.size(), &mesh.vertices[0], mesh.vertices.size(), sizeof(Vertex)));\n\n\tdouble end = timestamp();\n\n\tprintf(\"%-9s: %d triangles => %d triangles (%.2f%% deviation) in %.2f msec\\n\",\n\t \"Simplify\",\n\t int(mesh.indices.size() / 3), int(lod.indices.size() / 3),\n\t result_error * 100,\n\t (end - start) * 1000);\n}\n\nvoid simplifyAttr(const Mesh& mesh, float threshold = 0.2f, unsigned int options = 0)\n{\n\tMesh lod;\n\n\tdouble start = timestamp();\n\n\tsize_t target_index_count = size_t(mesh.indices.size() * threshold);\n\tfloat target_error = 1e-2f;\n\tfloat result_error = 0;\n\n\tconst float nrm_weight = 0.5f;\n\tconst float attr_weights[3] = {nrm_weight, nrm_weight, nrm_weight};\n\n\tlod.indices.resize(mesh.indices.size()); // note: simplify needs space for index_count elements in the destination array, not target_index_count\n\tlod.indices.resize(meshopt_simplifyWithAttributes(&lod.indices[0], &mesh.indices[0], mesh.indices.size(), &mesh.vertices[0].px, mesh.vertices.size(), sizeof(Vertex), &mesh.vertices[0].nx, sizeof(Vertex), attr_weights, 3, NULL, target_index_count, target_error, options, &result_error));\n\n\tlod.vertices.resize(lod.indices.size() < mesh.vertices.size() ? lod.indices.size() : mesh.vertices.size()); // note: this is just to reduce the cost of resize()\n\tlod.vertices.resize(meshopt_optimizeVertexFetch(&lod.vertices[0], &lod.indices[0], lod.indices.size(), &mesh.vertices[0], mesh.vertices.size(), sizeof(Vertex)));\n\n\tdouble end = timestamp();\n\n\tprintf(\"%-9s: %d triangles => %d triangles (%.2f%% deviation) in %.2f msec\\n\",\n\t \"SimplifyAttr\",\n\t int(mesh.indices.size() / 3), int(lod.indices.size() / 3),\n\t result_error * 100,\n\t (end - start) * 1000);\n}\n\nvoid simplifyUpdate(const Mesh& mesh, float threshold = 0.2f, unsigned int options = 0)\n{\n\tMesh lod;\n\n\tdouble start = timestamp();\n\n\tsize_t target_index_count = size_t(mesh.indices.size() * threshold);\n\tfloat target_error = 1e-2f;\n\tfloat result_error = 0;\n\n\tconst float nrm_weight = 0.5f;\n\tconst float attr_weights[3] = {nrm_weight, nrm_weight, nrm_weight};\n\n\tlod = mesh; // start from the original mesh\n\tlod.indices.resize(meshopt_simplifyWithUpdate(&lod.indices[0], mesh.indices.size(), &lod.vertices[0].px, mesh.vertices.size(), sizeof(Vertex), &lod.vertices[0].nx, sizeof(Vertex), attr_weights, 3, NULL, target_index_count, target_error, options, &result_error));\n\n\tlod.vertices.resize(meshopt_optimizeVertexFetch(&lod.vertices[0], &lod.indices[0], lod.indices.size(), &mesh.vertices[0], mesh.vertices.size(), sizeof(Vertex)));\n\n\tfor (size_t i = 0; i < lod.vertices.size(); ++i)\n\t{\n\t\t// update normals\n\t\tVertex& v = lod.vertices[i];\n\t\tfloat nl = sqrtf(v.nx * v.nx + v.ny * v.ny + v.nz * v.nz);\n\t\tif (nl > 0)\n\t\t{\n\t\t\tv.nx /= nl;\n\t\t\tv.ny /= nl;\n\t\t\tv.nz /= nl;\n\t\t}\n\t}\n\n\tdouble end = timestamp();\n\n\tprintf(\"%-9s: %d triangles => %d triangles (%.2f%% deviation) in %.2f msec\\n\",\n\t \"SimplifyUpdt\",\n\t int(mesh.indices.size() / 3), int(lod.indices.size() / 3),\n\t result_error * 100,\n\t (end - start) * 1000);\n}\n\nvoid simplifySloppy(const Mesh& mesh, float threshold = 0.2f)\n{\n\tMesh lod;\n\n\tdouble start = timestamp();\n\n\tsize_t target_index_count = size_t(mesh.indices.size() * threshold);\n\tfloat target_error = 1e-1f;\n\tfloat result_error = 0;\n\n\tlod.indices.resize(mesh.indices.size()); // note: simplify needs space for index_count elements in the destination array, not target_index_count\n\tlod.indices.resize(meshopt_simplifySloppy(&lod.indices[0], &mesh.indices[0], mesh.indices.size(), &mesh.vertices[0].px, mesh.vertices.size(), sizeof(Vertex), target_index_count, target_error, &result_error));\n\n\tlod.vertices.resize(lod.indices.size() < mesh.vertices.size() ? lod.indices.size() : mesh.vertices.size()); // note: this is just to reduce the cost of resize()\n\tlod.vertices.resize(meshopt_optimizeVertexFetch(&lod.vertices[0], &lod.indices[0], lod.indices.size(), &mesh.vertices[0], mesh.vertices.size(), sizeof(Vertex)));\n\n\tdouble end = timestamp();\n\n\tprintf(\"%-9s: %d triangles => %d triangles (%.2f%% deviation) in %.2f msec\\n\",\n\t \"SimplifyS\",\n\t int(mesh.indices.size() / 3), int(lod.indices.size() / 3),\n\t result_error * 100,\n\t (end - start) * 1000);\n}\n\nvoid simplifyPoints(const Mesh& mesh, float threshold = 0.2f)\n{\n\tdouble start = timestamp();\n\n\tsize_t target_vertex_count = size_t(mesh.vertices.size() * threshold);\n\tif (target_vertex_count == 0)\n\t\treturn;\n\n\tstd::vector indices(target_vertex_count);\n\tindices.resize(meshopt_simplifyPoints(&indices[0], &mesh.vertices[0].px, mesh.vertices.size(), sizeof(Vertex), NULL, 0, 0, target_vertex_count));\n\n\tdouble end = timestamp();\n\n\tprintf(\"%-9s: %d points => %d points in %.2f msec\\n\",\n\t \"SimplifyP\",\n\t int(mesh.vertices.size()), int(indices.size()), (end - start) * 1000);\n}\n\nvoid simplifyComplete(const Mesh& mesh)\n{\n\tstatic const size_t lod_count = 5;\n\n\tdouble start = timestamp();\n\n\t// generate 4 LOD levels (1-4), with each subsequent LOD using 70% triangles\n\t// note that each LOD uses the same (shared) vertex buffer\n\tstd::vector lods[lod_count];\n\n\tlods[0] = mesh.indices;\n\n\tfor (size_t i = 1; i < lod_count; ++i)\n\t{\n\t\tstd::vector& lod = lods[i];\n\n\t\tfloat threshold = powf(0.7f, float(i));\n\t\tsize_t target_index_count = size_t(mesh.indices.size() * threshold) / 3 * 3;\n\t\tfloat target_error = 1e-2f;\n\n\t\t// we can simplify all the way from base level or from the last result\n\t\t// simplifying from the base level sometimes produces better results, but simplifying from last level is faster\n\t\tconst std::vector& source = lods[i - 1];\n\n\t\tif (source.size() < target_index_count)\n\t\t\ttarget_index_count = source.size();\n\n\t\tlod.resize(source.size());\n\t\tlod.resize(meshopt_simplify(&lod[0], &source[0], source.size(), &mesh.vertices[0].px, mesh.vertices.size(), sizeof(Vertex), target_index_count, target_error));\n\t}\n\n\tdouble middle = timestamp();\n\n\t// optimize each individual LOD for vertex cache & overdraw\n\tfor (size_t i = 0; i < lod_count; ++i)\n\t{\n\t\tstd::vector& lod = lods[i];\n\n\t\tmeshopt_optimizeVertexCache(&lod[0], &lod[0], lod.size(), mesh.vertices.size());\n\t\tmeshopt_optimizeOverdraw(&lod[0], &lod[0], lod.size(), &mesh.vertices[0].px, mesh.vertices.size(), sizeof(Vertex), 1.0f);\n\t}\n\n\t// concatenate all LODs into one IB\n\t// note: the order of concatenation is important - since we optimize the entire IB for vertex fetch,\n\t// putting coarse LODs first makes sure that the vertex range referenced by them is as small as possible\n\t// some GPUs process the entire range referenced by the index buffer region so doing this optimizes the vertex transform\n\t// cost for coarse LODs\n\t// this order also produces much better vertex fetch cache coherency for coarse LODs (since they're essentially optimized first)\n\t// somewhat surprisingly, the vertex fetch cache coherency for fine LODs doesn't seem to suffer that much.\n\tsize_t lod_index_offsets[lod_count] = {};\n\tsize_t lod_index_counts[lod_count] = {};\n\tsize_t total_index_count = 0;\n\n\tfor (int i = lod_count - 1; i >= 0; --i)\n\t{\n\t\tlod_index_offsets[i] = total_index_count;\n\t\tlod_index_counts[i] = lods[i].size();\n\n\t\ttotal_index_count += lods[i].size();\n\t}\n\n\tstd::vector indices(total_index_count);\n\n\tfor (size_t i = 0; i < lod_count; ++i)\n\t{\n\t\tmemcpy(&indices[lod_index_offsets[i]], &lods[i][0], lods[i].size() * sizeof(lods[i][0]));\n\t}\n\n\tstd::vector vertices = mesh.vertices;\n\n\t// vertex fetch optimization should go last as it depends on the final index order\n\t// note that the order of LODs above affects vertex fetch results\n\tmeshopt_optimizeVertexFetch(&vertices[0], &indices[0], indices.size(), &vertices[0], vertices.size(), sizeof(Vertex));\n\n\tdouble end = timestamp();\n\n\tprintf(\"%-9s: %d triangles => %d LOD levels down to %d triangles in %.2f msec, optimized in %.2f msec\\n\",\n\t \"SimplifyC\",\n\t int(lod_index_counts[0]) / 3, int(lod_count), int(lod_index_counts[lod_count - 1]) / 3,\n\t (middle - start) * 1000, (end - middle) * 1000);\n\n\t// for using LOD data at runtime, in addition to vertices and indices you have to save lod_index_offsets/lod_index_counts.\n\n\t{\n\t\tmeshopt_VertexCacheStatistics vcs0 = meshopt_analyzeVertexCache(&indices[lod_index_offsets[0]], lod_index_counts[0], vertices.size(), 16, 0, 0);\n\t\tmeshopt_VertexFetchStatistics vfs0 = meshopt_analyzeVertexFetch(&indices[lod_index_offsets[0]], lod_index_counts[0], vertices.size(), sizeof(Vertex));\n\t\tmeshopt_VertexCacheStatistics vcsN = meshopt_analyzeVertexCache(&indices[lod_index_offsets[lod_count - 1]], lod_index_counts[lod_count - 1], vertices.size(), 16, 0, 0);\n\t\tmeshopt_VertexFetchStatistics vfsN = meshopt_analyzeVertexFetch(&indices[lod_index_offsets[lod_count - 1]], lod_index_counts[lod_count - 1], vertices.size(), sizeof(Vertex));\n\n\t\ttypedef PackedVertexOct PV;\n\n\t\tstd::vector pv(vertices.size());\n\t\tpackMesh(pv, vertices);\n\n\t\tstd::vector vbuf(meshopt_encodeVertexBufferBound(vertices.size(), sizeof(PV)));\n\t\tvbuf.resize(meshopt_encodeVertexBuffer(&vbuf[0], vbuf.size(), &pv[0], vertices.size(), sizeof(PV)));\n\n\t\tstd::vector ibuf(meshopt_encodeIndexBufferBound(indices.size(), vertices.size()));\n\t\tibuf.resize(meshopt_encodeIndexBuffer(&ibuf[0], ibuf.size(), &indices[0], indices.size()));\n\n\t\tprintf(\"%-9s ACMR %f...%f Overfetch %f..%f Codec VB %.1f bits/vertex IB %.1f bits/triangle\\n\",\n\t\t \"\",\n\t\t vcs0.acmr, vcsN.acmr, vfs0.overfetch, vfsN.overfetch,\n\t\t double(vbuf.size()) / double(vertices.size()) * 8,\n\t\t double(ibuf.size()) / double(indices.size() / 3) * 8);\n\t}\n}\n\nvoid simplifyClusters(const Mesh& mesh, float threshold = 0.2f)\n{\n\tconst size_t max_vertices = 64;\n\tconst size_t max_triangles = 64;\n\tconst size_t target_group_size = 8;\n\n\tdouble start = timestamp();\n\n\t// build clusters (meshlets) out of the mesh\n\tsize_t max_meshlets = meshopt_buildMeshletsBound(mesh.indices.size(), max_vertices, max_triangles);\n\tstd::vector meshlets(max_meshlets);\n\tstd::vector meshlet_vertices(mesh.indices.size());\n\tstd::vector meshlet_triangles(mesh.indices.size());\n\n\tmeshlets.resize(meshopt_buildMeshlets(&meshlets[0], &meshlet_vertices[0], &meshlet_triangles[0], &mesh.indices[0], mesh.indices.size(), &mesh.vertices[0].px, mesh.vertices.size(), sizeof(Vertex), max_vertices, max_triangles, 0.f));\n\n\tdouble middle = timestamp();\n\n\t// generate position remap; we'll use that to partition clusters using position-only adjacency\n\tstd::vector remap(mesh.vertices.size());\n\tmeshopt_generatePositionRemap(&remap[0], &mesh.vertices[0].px, mesh.vertices.size(), sizeof(Vertex));\n\n\t// partition clusters in groups; each group will be simplified separately and the boundaries between groups will be preserved\n\tstd::vector cluster_indices;\n\tcluster_indices.reserve(mesh.indices.size()); // slight underestimate, vector should realloc once\n\tstd::vector cluster_sizes(meshlets.size());\n\n\tfor (size_t i = 0; i < meshlets.size(); ++i)\n\t{\n\t\tconst meshopt_Meshlet& m = meshlets[i];\n\n\t\tfor (size_t j = 0; j < m.triangle_count * 3; ++j)\n\t\t{\n\t\t\tunsigned int v = meshlet_vertices[m.vertex_offset + meshlet_triangles[m.triangle_offset + j]];\n\n\t\t\t// use the first vertex with equivalent position so that cluster adjacency ignores attribute seams\n\t\t\tcluster_indices.push_back(remap[v]);\n\t\t}\n\n\t\tcluster_sizes[i] = m.triangle_count * 3;\n\t}\n\n\tstd::vector partition(meshlets.size());\n\tsize_t partition_count = meshopt_partitionClusters(&partition[0], &cluster_indices[0], cluster_indices.size(), &cluster_sizes[0], cluster_sizes.size(), &mesh.vertices[0].px, mesh.vertices.size(), sizeof(Vertex), target_group_size);\n\n\t// convert partitions to linked lists to make it easier to iterate over (vectors of vectors would work too)\n\tstd::vector partnext(meshlets.size(), -1);\n\tstd::vector partlast(partition_count, -1);\n\n\tfor (size_t i = 0; i < meshlets.size(); ++i)\n\t{\n\t\tunsigned int part = partition[i];\n\n\t\tif (partlast[part] >= 0)\n\t\t\tpartnext[partlast[part]] = int(i);\n\n\t\tpartlast[part] = int(i);\n\t\tpartnext[i] = -1;\n\t}\n\n\tdouble parttime = timestamp();\n\n\tfloat scale = meshopt_simplifyScale(&mesh.vertices[0].px, mesh.vertices.size(), sizeof(Vertex));\n\n\tstd::vector lod;\n\tlod.reserve(mesh.indices.size());\n\n\tfloat error = 0.f;\n\n\tfor (size_t i = 0; i < meshlets.size(); ++i)\n\t{\n\t\tif (partlast[partition[i]] < 0)\n\t\t\tcontinue; // part of a group that was already processed\n\n\t\t// mark group as processed\n\t\tpartlast[partition[i]] = -1;\n\n\t\tsize_t group_offset = lod.size();\n\n\t\tfor (int j = int(i); j >= 0; j = partnext[j])\n\t\t{\n\t\t\tconst meshopt_Meshlet& m = meshlets[j];\n\n\t\t\tfor (size_t k = 0; k < m.triangle_count * 3; ++k)\n\t\t\t\tlod.push_back(meshlet_vertices[m.vertex_offset + meshlet_triangles[m.triangle_offset + k]]);\n\t\t}\n\n\t\tsize_t group_triangles = (lod.size() - group_offset) / 3;\n\n\t\t// simplify the group, preserving the border vertices\n\t\t// note: this technically also locks the exterior border; a full mesh analysis (see clusterlod.h / lockBoundary) would work better for some meshes\n\t\tunsigned int options = meshopt_SimplifyLockBorder | meshopt_SimplifySparse | meshopt_SimplifyErrorAbsolute;\n\n\t\tfloat group_target_error = 1e-2f * scale;\n\t\tsize_t group_target = size_t(float(group_triangles) * threshold) * 3;\n\t\tfloat group_error = 0.f;\n\t\tsize_t group_size = meshopt_simplify(&lod[group_offset], &lod[group_offset], group_triangles * 3, &mesh.vertices[0].px, mesh.vertices.size(), sizeof(Vertex), group_target, group_target_error, options, &group_error);\n\n\t\terror = group_error > error ? group_error : error;\n\n\t\t// simplified group is available in lod[group_offset..group_offset + group_size]\n\t\tlod.resize(group_offset + group_size);\n\t}\n\n\tdouble end = timestamp();\n\n\tprintf(\"%-9s: %d triangles => %d triangles (%.2f%% deviation) in %.2f msec, clusterized in %.2f msec, partitioned in %.2f msec (%d clusters in %d groups, %.1f avg)\\n\",\n\t \"SimplifyG\",\n\t int(mesh.indices.size() / 3), int(lod.size() / 3),\n\t error / scale * 100,\n\t (end - parttime) * 1000, (middle - start) * 1000, (parttime - middle) * 1000,\n\t int(meshlets.size()), int(partition_count), double(meshlets.size()) / double(partition_count));\n}\n\nvoid optimize(const Mesh& mesh, bool fifo = false)\n{\n\tMesh copy = mesh;\n\t// note: we assume that the mesh is already optimally indexed (via parseObj); if that is not the case, you'd need to reindex first\n\n\tdouble start = timestamp();\n\n\t// vertex cache optimization should go first as it provides starting order for overdraw\n\t// note: fifo optimization is not recommended as a default, since it produces worse results, but it's faster to run so it can be useful for procedural meshes\n\tif (fifo)\n\t\tmeshopt_optimizeVertexCacheFifo(©.indices[0], ©.indices[0], copy.indices.size(), copy.vertices.size(), /* cache_size= */ 16);\n\telse\n\t\tmeshopt_optimizeVertexCache(©.indices[0], ©.indices[0], copy.indices.size(), copy.vertices.size());\n\n\t// reorder indices for overdraw, balancing overdraw and vertex cache efficiency\n\tconst float kThreshold = 1.01f; // allow up to 1% worse ACMR to get more reordering opportunities for overdraw\n\tmeshopt_optimizeOverdraw(©.indices[0], ©.indices[0], copy.indices.size(), ©.vertices[0].px, copy.vertices.size(), sizeof(Vertex), kThreshold);\n\n\t// vertex fetch optimization should go last as it depends on the final index order\n\tmeshopt_optimizeVertexFetch(©.vertices[0], ©.indices[0], copy.indices.size(), ©.vertices[0], copy.vertices.size(), sizeof(Vertex));\n\n\tdouble end = timestamp();\n\n\tmeshopt_VertexCacheStatistics vcs = meshopt_analyzeVertexCache(©.indices[0], copy.indices.size(), copy.vertices.size(), 16, 0, 0);\n\tmeshopt_VertexFetchStatistics vfs = meshopt_analyzeVertexFetch(©.indices[0], copy.indices.size(), copy.vertices.size(), sizeof(Vertex));\n\tmeshopt_OverdrawStatistics os = meshopt_analyzeOverdraw(©.indices[0], copy.indices.size(), ©.vertices[0].px, copy.vertices.size(), sizeof(Vertex));\n\n\tmeshopt_VertexCacheStatistics vcs_nv = meshopt_analyzeVertexCache(©.indices[0], copy.indices.size(), copy.vertices.size(), 32, 32, 32);\n\tmeshopt_VertexCacheStatistics vcs_amd = meshopt_analyzeVertexCache(©.indices[0], copy.indices.size(), copy.vertices.size(), 14, 64, 128);\n\tmeshopt_VertexCacheStatistics vcs_intel = meshopt_analyzeVertexCache(©.indices[0], copy.indices.size(), copy.vertices.size(), 128, 0, 0);\n\n\tprintf(\"Optimize%s: ACMR %f ATVR %f (NV %f AMD %f Intel %f) overfetch %f overdraw %f in %.2f msec\\n\",\n\t fifo ? \"F\" : \" \",\n\t vcs.acmr, vcs.atvr, vcs_nv.atvr, vcs_amd.atvr, vcs_intel.atvr, vfs.overfetch, os.overdraw, (end - start) * 1000);\n}\n\ntemplate \nsize_t compress(const std::vector& data, int level = SDEFL_LVL_DEF)\n{\n\tstd::vector cbuf(sdefl_bound(int(data.size() * sizeof(T))));\n\tsdefl s = {};\n\treturn sdeflate(&s, &cbuf[0], reinterpret_cast(&data[0]), int(data.size() * sizeof(T)), level);\n}\n\nvoid encodeIndex(const std::vector& indices, size_t vertex_count, char desc)\n{\n\t// allocate result outside of the timing loop to exclude memset() from decode timing\n\tstd::vector result(indices.size());\n\n\tdouble start = timestamp();\n\n\tstd::vector buffer(meshopt_encodeIndexBufferBound(indices.size(), vertex_count));\n\tbuffer.resize(meshopt_encodeIndexBuffer(&buffer[0], buffer.size(), &indices[0], indices.size()));\n\n\tdouble middle = timestamp();\n\n\tint res = meshopt_decodeIndexBuffer(&result[0], indices.size(), &buffer[0], buffer.size());\n\tassert(res == 0);\n\t(void)res;\n\n\tdouble end = timestamp();\n\n\tsize_t csize = compress(buffer);\n\n\tfor (size_t i = 0; i < indices.size(); i += 3)\n\t{\n\t\tassert(\n\t\t (result[i + 0] == indices[i + 0] && result[i + 1] == indices[i + 1] && result[i + 2] == indices[i + 2]) ||\n\t\t (result[i + 1] == indices[i + 0] && result[i + 2] == indices[i + 1] && result[i + 0] == indices[i + 2]) ||\n\t\t (result[i + 2] == indices[i + 0] && result[i + 0] == indices[i + 1] && result[i + 1] == indices[i + 2]));\n\t}\n\n\tprintf(\"IdxCodec%c: %.1f bits/triangle (post-deflate %.1f bits/triangle); encode %.2f msec (%.3f GB/s), decode %.2f msec (%.2f GB/s)\\n\",\n\t desc,\n\t double(buffer.size() * 8) / double(indices.size() / 3),\n\t double(csize * 8) / double(indices.size() / 3),\n\t (middle - start) * 1000,\n\t (double(result.size() * 4) / 1e9) / (middle - start),\n\t (end - middle) * 1000,\n\t (double(result.size() * 4) / 1e9) / (end - middle));\n}\n\nvoid encodeIndex(const Mesh& mesh, char desc)\n{\n\tencodeIndex(mesh.indices, mesh.vertices.size(), desc);\n}\n\nvoid encodeIndexSequence(const std::vector& data, size_t vertex_count, char desc)\n{\n\t// allocate result outside of the timing loop to exclude memset() from decode timing\n\tstd::vector result(data.size());\n\n\tdouble start = timestamp();\n\n\tstd::vector buffer(meshopt_encodeIndexSequenceBound(data.size(), vertex_count));\n\tbuffer.resize(meshopt_encodeIndexSequence(&buffer[0], buffer.size(), &data[0], data.size()));\n\n\tdouble middle = timestamp();\n\n\tint res = meshopt_decodeIndexSequence(&result[0], data.size(), &buffer[0], buffer.size());\n\tassert(res == 0);\n\t(void)res;\n\n\tdouble end = timestamp();\n\n\tsize_t csize = compress(buffer);\n\n\tassert(memcmp(&data[0], &result[0], data.size() * sizeof(unsigned int)) == 0);\n\n\tprintf(\"IdxCodec%c: %.1f bits/index (post-deflate %.1f bits/index); encode %.2f msec (%.3f GB/s), decode %.2f msec (%.2f GB/s)\\n\",\n\t desc,\n\t double(buffer.size() * 8) / double(data.size()),\n\t double(csize * 8) / double(data.size()),\n\t (middle - start) * 1000,\n\t (double(result.size() * 4) / 1e9) / (middle - start),\n\t (end - middle) * 1000,\n\t (double(result.size() * 4) / 1e9) / (end - middle));\n}\n\ntemplate \nstatic void validateDecodeMeshlet(const unsigned char* data, size_t size, const unsigned int* vertices, size_t vertex_count, const unsigned char* triangles, size_t triangle_count)\n{\n\tV rv[256];\n\tT rt[sizeof(T) == 1 ? 256 * 3 : 256];\n\n\tint rc = meshopt_decodeMeshlet(rv, vertex_count, rt, triangle_count, data, size);\n\tassert(rc == 0);\n\n\tfor (size_t j = 0; j < vertex_count; ++j)\n\t\tassert(rv[j] == V(vertices[j]));\n\n\tfor (size_t j = 0; j < triangle_count; ++j)\n\t{\n\t\tunsigned int a = triangles[j * 3 + 0];\n\t\tunsigned int b = triangles[j * 3 + 1];\n\t\tunsigned int c = triangles[j * 3 + 2];\n\n\t\tunsigned int tri = sizeof(T) == 1 ? rt[j * 3] | (rt[j * 3 + 1] << 8) | (rt[j * 3 + 2] << 16) : rt[j];\n\n\t\tunsigned int abc = (a << 0) | (b << 8) | (c << 16);\n\t\tunsigned int bca = (b << 0) | (c << 8) | (a << 16);\n\t\tunsigned int cba = (c << 0) | (a << 8) | (b << 16);\n\n\t\tassert(tri == abc || tri == bca || tri == cba);\n\t}\n}\n\nvoid encodeMeshlets(const Mesh& mesh, size_t max_vertices, size_t max_triangles, bool reorder = true)\n{\n\tsize_t max_meshlets = meshopt_buildMeshletsBound(mesh.indices.size(), max_vertices, max_triangles);\n\tstd::vector meshlets(max_meshlets);\n\tstd::vector meshlet_vertices(mesh.indices.size());\n\tstd::vector meshlet_triangles(mesh.indices.size());\n\n\tmeshlets.resize(meshopt_buildMeshlets(&meshlets[0], &meshlet_vertices[0], &meshlet_triangles[0], &mesh.indices[0], mesh.indices.size(), &mesh.vertices[0].px, mesh.vertices.size(), sizeof(Vertex), max_vertices, max_triangles, 0.f));\n\n\tif (meshlets.size())\n\t{\n\t\tconst meshopt_Meshlet& last = meshlets.back();\n\n\t\t// this is an example of how to trim the vertex/triangle arrays when copying data out to GPU storage\n\t\tmeshlet_vertices.resize(last.vertex_offset + last.vertex_count);\n\t\tmeshlet_triangles.resize(last.triangle_offset + last.triangle_count * 3);\n\n\t\t// TODO: over-allocate meshlet_vertices to multiple of 3 to make meshopt_optimizeVertexFetch below work without assertions\n\t\tmeshlet_vertices.resize((meshlet_vertices.size() + 2) / 3 * 3);\n\t}\n\n\tstd::vector cbuf(meshopt_encodeMeshletBound(max_vertices, max_triangles));\n\n\t// optimize each meshlet for locality; this is important for performance, and critical for good compression\n\tfor (size_t i = 0; i < meshlets.size(); ++i)\n\t\tmeshopt_optimizeMeshlet(&meshlet_vertices[meshlets[i].vertex_offset], &meshlet_triangles[meshlets[i].triangle_offset], meshlets[i].triangle_count, meshlets[i].vertex_count);\n\n\t// optimize the order of vertex references within each meshlet and globally; this is valuable for access locality and critical for compression of vertex references\n\t// note that this reorders the vertex buffer too, so if a traditional index buffer is required it would need to be reconstructed from the meshlet data for optimal locality\n\tstd::vector vertices = mesh.vertices;\n\tif (reorder)\n\t\tmeshopt_optimizeVertexFetch(&vertices[0], &meshlet_vertices[0], meshlet_vertices.size(), &mesh.vertices[0], mesh.vertices.size(), sizeof(Vertex));\n\n\tsize_t mbst = 0;\n\n\tstd::vector packed;\n\n\tfor (size_t i = 0; i < meshlets.size(); ++i)\n\t{\n\t\tconst meshopt_Meshlet& meshlet = meshlets[i];\n\n\t\tsize_t mbs = meshopt_encodeMeshlet(&cbuf[0], cbuf.size(), &meshlet_vertices[meshlet.vertex_offset], meshlet.vertex_count, &meshlet_triangles[meshlet.triangle_offset], meshlet.triangle_count);\n\t\tassert(mbs > 0);\n\n\t\t// 24-bit header: 7 bit (vertex_count-1), 7 bit (triangle_count-1), 10 bit size\n\t\t// fits up to 128v/128t meshlet with 1024 bytes of encoded data; meshopt_encodeMeshletBound(128,128) < 1000\n\t\tassert(size_t(meshlet.vertex_count - 1) < 128 && size_t(meshlet.triangle_count - 1) < 128 && mbs < 1024);\n\t\tunsigned int header = ((meshlet.vertex_count - 1) & 0x7f) | (((meshlet.triangle_count - 1) & 0x7f) << 7) | ((unsigned(mbs) & 0x3ff) << 14);\n\t\tpacked.push_back((unsigned char)(header & 0xff));\n\t\tpacked.push_back((unsigned char)((header >> 8) & 0xff));\n\t\tpacked.push_back((unsigned char)((header >> 16) & 0xff));\n\t\tpacked.insert(packed.end(), &cbuf[0], &cbuf[mbs]);\n\n\t\tvalidateDecodeMeshlet(&cbuf[0], mbs, &meshlet_vertices[meshlet.vertex_offset], meshlet.vertex_count, &meshlet_triangles[meshlet.triangle_offset], meshlet.triangle_count);\n\t\tvalidateDecodeMeshlet(&cbuf[0], mbs, &meshlet_vertices[meshlet.vertex_offset], meshlet.vertex_count, &meshlet_triangles[meshlet.triangle_offset], meshlet.triangle_count);\n\t\tvalidateDecodeMeshlet(&cbuf[0], mbs, &meshlet_vertices[meshlet.vertex_offset], meshlet.vertex_count, &meshlet_triangles[meshlet.triangle_offset], meshlet.triangle_count);\n\t\tvalidateDecodeMeshlet(&cbuf[0], mbs, &meshlet_vertices[meshlet.vertex_offset], meshlet.vertex_count, &meshlet_triangles[meshlet.triangle_offset], meshlet.triangle_count);\n\n\t\tmbst += mbs;\n\t}\n\n\tsize_t mbc = compress(packed);\n\n\tprintf(\"MeshletCodec (%d/%d): %d meshlets, %d bytes/meshlet; %d bytes, %.1f bits/triangle\\n\",\n\t int(max_vertices), int(max_triangles),\n\t int(meshlets.size()),\n\t int(mbst / meshlets.size()),\n\t int(mbst), double(mbst * 8) / double(mesh.indices.size() / 3));\n\tprintf(\"MeshletCodec (%d/%d, packed): %d bytes/meshlet, %.1f bits/triangle; post-deflate: %d bytes/meshlet, %.1f bits/triangle)\\n\",\n\t int(max_vertices), int(max_triangles),\n\t int(packed.size() / meshlets.size()), double(packed.size() * 8) / double(mesh.indices.size() / 3),\n\t int(mbc / meshlets.size()), double(mbc * 8) / double(mesh.indices.size() / 3));\n\n#if !TRACE\n\tdouble mbtime = 0;\n\n\tfor (int i = 0; i < 10; ++i)\n\t{\n\t\tunsigned int rv[256];\n\t\tunsigned int rt[256];\n\t\tdouble t0 = timestamp();\n\t\tunsigned char* p = &packed[0];\n\t\tfor (size_t j = 0; j < meshlets.size(); ++j)\n\t\t{\n\t\t\tunsigned int header = p[0] | (p[1] << 8) | (p[2] << 16);\n\t\t\tsize_t vertex_count = (header & 0x7f) + 1;\n\t\t\tsize_t triangle_count = ((header >> 7) & 0x7f) + 1;\n\t\t\tsize_t size = (header >> 14) & 0x3ff;\n\t\t\tmeshopt_decodeMeshletRaw(rv, vertex_count, rt, triangle_count, p + 3, size);\n\t\t\tp += 3 + size;\n\t\t}\n\t\tdouble t1 = timestamp();\n\n\t\tmbtime = (mbtime == 0 || t1 - t0 < mbtime) ? (t1 - t0) : mbtime;\n\t}\n\n\tprintf(\"MeshletCodec (%d/%d, packed): decode time %.3f msec, %.3fB tri/sec, %.1f ns/meshlet\\n\",\n\t int(max_vertices), int(max_triangles),\n\t mbtime * 1000, double(mesh.indices.size() / 3) / 1e9 / mbtime, mbtime * 1e9 / double(meshlets.size()));\n#endif\n}\n\ntemplate \nvoid packVertex(const Mesh& mesh, const char* pvn)\n{\n\tstd::vector pv(mesh.vertices.size());\n\tpackMesh(pv, mesh.vertices);\n\n\tsize_t csize = compress(pv);\n\n\tprintf(\"VtxPack%s : %.1f bits/vertex (post-deflate %.1f bits/vertex)\\n\", pvn,\n\t double(pv.size() * sizeof(PV) * 8) / double(mesh.vertices.size()),\n\t double(csize * 8) / double(mesh.vertices.size()));\n}\n\ntemplate \nvoid encodeVertex(const Mesh& mesh, const char* pvn, int level = 2)\n{\n\tstd::vector pv(mesh.vertices.size());\n\tpackMesh(pv, mesh.vertices);\n\n\t// allocate result outside of the timing loop to exclude memset() from decode timing\n\tstd::vector result(mesh.vertices.size());\n\n\tdouble start = timestamp();\n\n\tstd::vector vbuf(meshopt_encodeVertexBufferBound(mesh.vertices.size(), sizeof(PV)));\n\tvbuf.resize(meshopt_encodeVertexBufferLevel(&vbuf[0], vbuf.size(), &pv[0], mesh.vertices.size(), sizeof(PV), level, -1));\n\n\tdouble middle = timestamp();\n\n\tint res = meshopt_decodeVertexBuffer(&result[0], mesh.vertices.size(), sizeof(PV), &vbuf[0], vbuf.size());\n\tassert(res == 0);\n\t(void)res;\n\n\tdouble end = timestamp();\n\n\tassert(memcmp(&pv[0], &result[0], pv.size() * sizeof(PV)) == 0);\n\n\tsize_t csize = compress(vbuf);\n\n\tprintf(\"VtxCodec%1s: %.1f bits/vertex (post-deflate %.1f bits/vertex); encode %.2f msec (%.3f GB/s), decode %.2f msec (%.2f GB/s)\\n\", pvn,\n\t double(vbuf.size() * 8) / double(mesh.vertices.size()),\n\t double(csize * 8) / double(mesh.vertices.size()),\n\t (middle - start) * 1000,\n\t (double(result.size() * sizeof(PV)) / 1e9) / (middle - start),\n\t (end - middle) * 1000,\n\t (double(result.size() * sizeof(PV)) / 1e9) / (end - middle));\n}\n\nvoid stripify(const Mesh& mesh, bool use_restart, char desc)\n{\n\tunsigned int restart_index = use_restart ? ~0u : 0;\n\n\t// note: input mesh is assumed to be optimized for vertex cache and vertex fetch\n\tdouble start = timestamp();\n\tstd::vector strip(meshopt_stripifyBound(mesh.indices.size()));\n\tstrip.resize(meshopt_stripify(&strip[0], &mesh.indices[0], mesh.indices.size(), mesh.vertices.size(), restart_index));\n\tdouble end = timestamp();\n\n\tsize_t restarts = 0;\n\tfor (size_t i = 0; i < strip.size(); ++i)\n\t\trestarts += use_restart && strip[i] == restart_index;\n\n\tMesh copy = mesh;\n\tcopy.indices.resize(meshopt_unstripify(©.indices[0], &strip[0], strip.size(), restart_index));\n\tassert(copy.indices.size() <= meshopt_unstripifyBound(strip.size()));\n\n\tmeshopt_VertexCacheStatistics vcs = meshopt_analyzeVertexCache(©.indices[0], mesh.indices.size(), mesh.vertices.size(), 16, 0, 0);\n\tmeshopt_VertexCacheStatistics vcs_nv = meshopt_analyzeVertexCache(©.indices[0], mesh.indices.size(), mesh.vertices.size(), 32, 32, 32);\n\tmeshopt_VertexCacheStatistics vcs_amd = meshopt_analyzeVertexCache(©.indices[0], mesh.indices.size(), mesh.vertices.size(), 14, 64, 128);\n\tmeshopt_VertexCacheStatistics vcs_intel = meshopt_analyzeVertexCache(©.indices[0], mesh.indices.size(), mesh.vertices.size(), 128, 0, 0);\n\n\tprintf(\"Stripify%c: ACMR %f ATVR %f (NV %f AMD %f Intel %f); %.1f run avg, %d strip indices (%.1f%%) in %.2f msec\\n\",\n\t desc,\n\t vcs.acmr, vcs.atvr, vcs_nv.atvr, vcs_amd.atvr, vcs_intel.atvr,\n\t use_restart ? double(strip.size() - restarts) / double(restarts + 1) : 0,\n\t int(strip.size()), double(strip.size()) / double(mesh.indices.size()) * 100,\n\t (end - start) * 1000);\n}\n\nvoid shadow(const Mesh& mesh)\n{\n\t// note: input mesh is assumed to be optimized for vertex cache and vertex fetch\n\n\tdouble start = timestamp();\n\t// this index buffer can be used for position-only rendering using the same vertex data that the original index buffer uses\n\tstd::vector shadow_indices(mesh.indices.size());\n\tmeshopt_generateShadowIndexBuffer(&shadow_indices[0], &mesh.indices[0], mesh.indices.size(), &mesh.vertices[0], mesh.vertices.size(), sizeof(float) * 3, sizeof(Vertex));\n\tdouble end = timestamp();\n\n\t// while you can't optimize the vertex data after shadow IB was constructed, you can and should optimize the shadow IB for vertex cache\n\t// this is valuable even if the original indices array was optimized for vertex cache!\n\tmeshopt_optimizeVertexCache(&shadow_indices[0], &shadow_indices[0], shadow_indices.size(), mesh.vertices.size());\n\n\tmeshopt_VertexCacheStatistics vcs = meshopt_analyzeVertexCache(&mesh.indices[0], mesh.indices.size(), mesh.vertices.size(), 16, 0, 0);\n\tmeshopt_VertexCacheStatistics vcss = meshopt_analyzeVertexCache(&shadow_indices[0], shadow_indices.size(), mesh.vertices.size(), 16, 0, 0);\n\n\tstd::vector shadow_flags(mesh.vertices.size());\n\tsize_t shadow_vertices = 0;\n\n\tfor (size_t i = 0; i < shadow_indices.size(); ++i)\n\t{\n\t\tunsigned int index = shadow_indices[i];\n\t\tshadow_vertices += 1 - shadow_flags[index];\n\t\tshadow_flags[index] = 1;\n\t}\n\n\tprintf(\"ShadowIB : ACMR %f (%.2fx improvement); %d shadow vertices (%.2fx improvement) in %.2f msec\\n\",\n\t vcss.acmr, double(vcs.vertices_transformed) / double(vcss.vertices_transformed),\n\t int(shadow_vertices), double(mesh.vertices.size()) / double(shadow_vertices),\n\t (end - start) * 1000);\n}\n\nstatic int follow(int* parents, int index)\n{\n\twhile (index != parents[index])\n\t{\n\t\tint parent = parents[index];\n\t\tparents[index] = parents[parent];\n\t\tindex = parent;\n\t}\n\n\treturn index;\n}\n\nvoid meshlets(const Mesh& mesh, bool scan = false, bool uniform = false, bool flex = false, bool spatial = false, bool dump = false)\n{\n\t// NVidia recommends 64/126; we also test uniform configuration with 64/64 which is better for earlier AMD GPUs\n\tconst size_t max_vertices = 64;\n\tconst size_t max_triangles = uniform ? 64 : 126;\n\tconst size_t min_triangles = spatial ? 16 : (uniform ? 24 : 32); // only used in flex/spatial modes\n\n\t// note: should be set to 0 unless cone culling is used at runtime!\n\tconst float cone_weight = 0.25f;\n\tconst float split_factor = flex ? 2.0f : 0.0f;\n\n\t// note: input mesh is assumed to be optimized for vertex cache and vertex fetch\n\tdouble start = timestamp();\n\tsize_t max_meshlets = meshopt_buildMeshletsBound(mesh.indices.size(), max_vertices, min_triangles);\n\tstd::vector meshlets(max_meshlets);\n\tstd::vector meshlet_vertices(mesh.indices.size());\n\tstd::vector meshlet_triangles(mesh.indices.size());\n\n\tif (scan)\n\t\tmeshlets.resize(meshopt_buildMeshletsScan(&meshlets[0], &meshlet_vertices[0], &meshlet_triangles[0], &mesh.indices[0], mesh.indices.size(), mesh.vertices.size(), max_vertices, max_triangles));\n\telse if (flex)\n\t\tmeshlets.resize(meshopt_buildMeshletsFlex(&meshlets[0], &meshlet_vertices[0], &meshlet_triangles[0], &mesh.indices[0], mesh.indices.size(), &mesh.vertices[0].px, mesh.vertices.size(), sizeof(Vertex), max_vertices, min_triangles, max_triangles, cone_weight, split_factor));\n\telse if (spatial)\n\t\tmeshlets.resize(meshopt_buildMeshletsSpatial(&meshlets[0], &meshlet_vertices[0], &meshlet_triangles[0], &mesh.indices[0], mesh.indices.size(), &mesh.vertices[0].px, mesh.vertices.size(), sizeof(Vertex), max_vertices, min_triangles, max_triangles, 0.f));\n\telse // note: equivalent to the call of buildMeshletsFlex() with split_factor = 0 and min_triangles = max_triangles\n\t\tmeshlets.resize(meshopt_buildMeshlets(&meshlets[0], &meshlet_vertices[0], &meshlet_triangles[0], &mesh.indices[0], mesh.indices.size(), &mesh.vertices[0].px, mesh.vertices.size(), sizeof(Vertex), max_vertices, max_triangles, cone_weight));\n\n\tif (!dump)\n\t\tfor (size_t i = 0; i < meshlets.size(); ++i)\n\t\t\tmeshopt_optimizeMeshlet(&meshlet_vertices[meshlets[i].vertex_offset], &meshlet_triangles[meshlets[i].triangle_offset], meshlets[i].triangle_count, meshlets[i].vertex_count);\n\n\tif (meshlets.size())\n\t{\n\t\tconst meshopt_Meshlet& last = meshlets.back();\n\n\t\t// this is an example of how to trim the vertex/triangle arrays when copying data out to GPU storage\n\t\tmeshlet_vertices.resize(last.vertex_offset + last.vertex_count);\n\t\tmeshlet_triangles.resize(last.triangle_offset + last.triangle_count * 3);\n\t}\n\n\tdouble end = timestamp();\n\n\tif (dump)\n\t\tdumpObj(mesh.vertices, std::vector());\n\n\tdouble avg_vertices = 0;\n\tdouble avg_triangles = 0;\n\tdouble avg_boundary = 0;\n\tdouble avg_connected = 0;\n\tsize_t not_full = 0;\n\n\tstd::vector boundary(mesh.vertices.size());\n\n\tfor (size_t i = 0; i < meshlets.size(); ++i)\n\t{\n\t\tconst meshopt_Meshlet& m = meshlets[i];\n\n\t\tfor (unsigned int j = 0; j < m.vertex_count; ++j)\n\t\t\tboundary[meshlet_vertices[m.vertex_offset + j]]++;\n\t}\n\n\tstd::vector cluster;\n\n\tfor (size_t i = 0; i < meshlets.size(); ++i)\n\t{\n\t\tconst meshopt_Meshlet& m = meshlets[i];\n\n\t\tif (dump)\n\t\t{\n\t\t\tcluster.clear();\n\t\t\tfor (unsigned int j = 0; j < m.triangle_count * 3; ++j)\n\t\t\t\tcluster.push_back(meshlet_vertices[m.vertex_offset + meshlet_triangles[m.triangle_offset + j]]);\n\n\t\t\tchar cname[32];\n\t\t\tsnprintf(cname, sizeof(cname), \"ml_%d\\n\", int(i));\n\t\t\tdumpObj(cname, cluster);\n\t\t}\n\n\t\tavg_vertices += m.vertex_count;\n\t\tavg_triangles += m.triangle_count;\n\t\tnot_full += uniform ? m.triangle_count < max_triangles : m.vertex_count < max_vertices;\n\n\t\tfor (unsigned int j = 0; j < m.vertex_count; ++j)\n\t\t\tif (boundary[meshlet_vertices[m.vertex_offset + j]] > 1)\n\t\t\t\tavg_boundary += 1;\n\n\t\t// union-find vertices to check if the meshlet is connected\n\t\tint parents[256];\n\t\tfor (unsigned int j = 0; j < m.vertex_count; ++j)\n\t\t\tparents[j] = int(j);\n\n\t\tfor (unsigned int j = 0; j < m.triangle_count * 3; ++j)\n\t\t{\n\t\t\tint v0 = meshlet_triangles[m.triangle_offset + j];\n\t\t\tint v1 = meshlet_triangles[m.triangle_offset + j + (j % 3 == 2 ? -2 : 1)];\n\n\t\t\tv0 = follow(parents, v0);\n\t\t\tv1 = follow(parents, v1);\n\n\t\t\tparents[v0] = v1;\n\t\t}\n\n\t\tint roots = 0;\n\t\tfor (unsigned int j = 0; j < m.vertex_count; ++j)\n\t\t\troots += follow(parents, j) == int(j);\n\n\t\tassert(roots != 0);\n\t\tavg_connected += roots;\n\t}\n\n\tavg_vertices /= double(meshlets.size());\n\tavg_triangles /= double(meshlets.size());\n\tavg_boundary /= double(meshlets.size());\n\tavg_connected /= double(meshlets.size());\n\n\tprintf(\"Meshlets%c: %d meshlets (avg vertices %.1f, avg triangles %.1f, avg boundary %.1f, avg connected %.2f, not full %d) in %.2f msec\\n\",\n\t scan ? 'S' : (flex ? 'F' : (spatial ? 'X' : (uniform ? 'U' : ' '))),\n\t int(meshlets.size()), avg_vertices, avg_triangles, avg_boundary, avg_connected, int(not_full), (end - start) * 1000);\n\n\tfloat camera[3] = {100, 100, 100};\n\n\tsize_t rejected = 0;\n\tsize_t accepted = 0;\n\tdouble radius_mean = 0;\n\tdouble cone_mean = 0;\n\n\tstd::vector radii(meshlets.size());\n\tstd::vector cones(meshlets.size());\n\n\tdouble startc = timestamp();\n\tfor (size_t i = 0; i < meshlets.size(); ++i)\n\t{\n\t\tconst meshopt_Meshlet& m = meshlets[i];\n\n\t\tmeshopt_Bounds bounds = meshopt_computeMeshletBounds(&meshlet_vertices[m.vertex_offset], &meshlet_triangles[m.triangle_offset], m.triangle_count, &mesh.vertices[0].px, mesh.vertices.size(), sizeof(Vertex));\n\n\t\tradii[i] = bounds.radius;\n\t\tcones[i] = 90.f - acosf(bounds.cone_cutoff) * (180.f / 3.1415926f);\n\n\t\tradius_mean += radii[i];\n\t\tcone_mean += cones[i];\n\n\t\t// trivial accept: we can't ever backface cull this meshlet\n\t\taccepted += (bounds.cone_cutoff >= 1);\n\n\t\t// perspective projection: dot(normalize(cone_apex - camera_position), cone_axis) > cone_cutoff\n\t\t// alternative formulation for perspective projection that doesn't use apex (and uses cluster bounding sphere instead):\n\t\t// dot(normalize(center - camera_position), cone_axis) > cone_cutoff + radius / length(center - camera_position)\n\t\tfloat cview[3] = {bounds.center[0] - camera[0], bounds.center[1] - camera[1], bounds.center[2] - camera[2]};\n\t\tfloat cviewlength = sqrtf(cview[0] * cview[0] + cview[1] * cview[1] + cview[2] * cview[2]);\n\n\t\trejected += cview[0] * bounds.cone_axis[0] + cview[1] * bounds.cone_axis[1] + cview[2] * bounds.cone_axis[2] >= bounds.cone_cutoff * cviewlength + bounds.radius;\n\t}\n\tdouble endc = timestamp();\n\n\tradius_mean /= double(meshlets.size());\n\tcone_mean /= double(meshlets.size());\n\n\tdouble radius_variance = 0;\n\n\tfor (size_t i = 0; i < meshlets.size(); ++i)\n\t\tradius_variance += (radii[i] - radius_mean) * (radii[i] - radius_mean);\n\n\tradius_variance /= double(meshlets.size() - 1);\n\n\tdouble radius_stddev = sqrt(radius_variance);\n\n\tsize_t meshlets_std = 0;\n\n\tfor (size_t i = 0; i < meshlets.size(); ++i)\n\t\tmeshlets_std += radii[i] < radius_mean + radius_stddev;\n\n\tprintf(\"Bounds : radius mean %f stddev %f; %.1f%% meshlets under 1σ; cone angle %.1f°; cone reject %.1f%% trivial accept %.1f%% in %.2f msec\\n\",\n\t radius_mean, radius_stddev,\n\t double(meshlets_std) / double(meshlets.size()) * 100,\n\t cone_mean, double(rejected) / double(meshlets.size()) * 100, double(accepted) / double(meshlets.size()) * 100,\n\t (endc - startc) * 1000);\n}\n\nvoid spatialSort(const Mesh& mesh)\n{\n\ttypedef PackedVertexOct PV;\n\n\tstd::vector pv(mesh.vertices.size());\n\tpackMesh(pv, mesh.vertices);\n\n\tdouble start = timestamp();\n\n\tstd::vector remap(mesh.vertices.size());\n\tmeshopt_spatialSortRemap(&remap[0], &mesh.vertices[0].px, mesh.vertices.size(), sizeof(Vertex));\n\n\tdouble end = timestamp();\n\n\tmeshopt_remapVertexBuffer(&pv[0], &pv[0], mesh.vertices.size(), sizeof(PV), &remap[0]);\n\n\tstd::vector vbuf(meshopt_encodeVertexBufferBound(mesh.vertices.size(), sizeof(PV)));\n\tvbuf.resize(meshopt_encodeVertexBuffer(&vbuf[0], vbuf.size(), &pv[0], mesh.vertices.size(), sizeof(PV)));\n\n\tsize_t csize = compress(vbuf);\n\n\tprintf(\"Spatial : %.1f bits/vertex (post-deflate %.1f bits/vertex); sort %.2f msec\\n\",\n\t double(vbuf.size() * 8) / double(mesh.vertices.size()),\n\t double(csize * 8) / double(mesh.vertices.size()),\n\t (end - start) * 1000);\n}\n\nvoid spatialSortTriangles(const Mesh& mesh)\n{\n\ttypedef PackedVertexOct PV;\n\n\tMesh copy = mesh;\n\n\tdouble start = timestamp();\n\n\tmeshopt_spatialSortTriangles(©.indices[0], ©.indices[0], mesh.indices.size(), ©.vertices[0].px, copy.vertices.size(), sizeof(Vertex));\n\n\tdouble end = timestamp();\n\n\tmeshopt_optimizeVertexCache(©.indices[0], ©.indices[0], copy.indices.size(), copy.vertices.size());\n\tmeshopt_optimizeVertexFetch(©.vertices[0], ©.indices[0], copy.indices.size(), ©.vertices[0], copy.vertices.size(), sizeof(Vertex));\n\n\tstd::vector pv(mesh.vertices.size());\n\tpackMesh(pv, copy.vertices);\n\n\tstd::vector vbuf(meshopt_encodeVertexBufferBound(mesh.vertices.size(), sizeof(PV)));\n\tvbuf.resize(meshopt_encodeVertexBuffer(&vbuf[0], vbuf.size(), &pv[0], mesh.vertices.size(), sizeof(PV)));\n\n\tstd::vector ibuf(meshopt_encodeIndexBufferBound(mesh.indices.size(), mesh.vertices.size()));\n\tibuf.resize(meshopt_encodeIndexBuffer(&ibuf[0], ibuf.size(), ©.indices[0], mesh.indices.size()));\n\n\tsize_t csizev = compress(vbuf);\n\tsize_t csizei = compress(ibuf);\n\n\tprintf(\"SpatialT : %.1f bits/vertex (post-deflate %.1f bits/vertex); %.1f bits/triangle (post-deflate %.1f bits/triangle); sort %.2f msec\\n\",\n\t double(vbuf.size() * 8) / double(mesh.vertices.size()),\n\t double(csizev * 8) / double(mesh.vertices.size()),\n\t double(ibuf.size() * 8) / double(mesh.indices.size() / 3),\n\t double(csizei * 8) / double(mesh.indices.size() / 3),\n\t (end - start) * 1000);\n}\n\nvoid spatialClusterPoints(const Mesh& mesh, size_t cluster_size)\n{\n\ttypedef PackedVertexOct PV;\n\n\tdouble start = timestamp();\n\n\tstd::vector index(mesh.vertices.size());\n\tmeshopt_spatialClusterPoints(&index[0], &mesh.vertices[0].px, mesh.vertices.size(), sizeof(Vertex), cluster_size);\n\n\tdouble end = timestamp();\n\n\tstd::vector pv(mesh.vertices.size());\n\tpackMesh(pv, mesh.vertices);\n\n\tstd::vector pvo(mesh.vertices.size());\n\tfor (size_t i = 0; i < index.size(); ++i)\n\t\tpvo[i] = pv[index[i]];\n\n\tstd::vector vbuf(meshopt_encodeVertexBufferBound(mesh.vertices.size(), sizeof(PV)));\n\tvbuf.resize(meshopt_encodeVertexBuffer(&vbuf[0], vbuf.size(), &pvo[0], mesh.vertices.size(), sizeof(PV)));\n\n\tsize_t csize = compress(vbuf);\n\n\tprintf(\"SpatialCP: %.1f bits/vertex (post-deflate %.1f bits/vertex); sort %.2f msec\\n\",\n\t double(vbuf.size() * 8) / double(mesh.vertices.size()),\n\t double(csize * 8) / double(mesh.vertices.size()),\n\t (end - start) * 1000);\n}\n\nvoid tessellationAdjacency(const Mesh& mesh)\n{\n\tdouble start = timestamp();\n\n\t// 12 indices per input triangle\n\tstd::vector tessib(mesh.indices.size() * 4);\n\tmeshopt_generateTessellationIndexBuffer(&tessib[0], &mesh.indices[0], mesh.indices.size(), &mesh.vertices[0].px, mesh.vertices.size(), sizeof(Vertex));\n\n\tdouble middle = timestamp();\n\n\t// 6 indices per input triangle\n\tstd::vector adjib(mesh.indices.size() * 2);\n\tmeshopt_generateAdjacencyIndexBuffer(&adjib[0], &mesh.indices[0], mesh.indices.size(), &mesh.vertices[0].px, mesh.vertices.size(), sizeof(Vertex));\n\n\tdouble end = timestamp();\n\n\tprintf(\"Tesselltn: %d patches in %.2f msec\\n\", int(mesh.indices.size() / 3), (middle - start) * 1000);\n\tprintf(\"Adjacency: %d patches in %.2f msec\\n\", int(mesh.indices.size() / 3), (end - middle) * 1000);\n}\n\nvoid provoking(const Mesh& mesh)\n{\n\tdouble start = timestamp();\n\n\t// worst case number of vertices: vertex count + triangle count\n\tstd::vector pib(mesh.indices.size());\n\tstd::vector reorder(mesh.vertices.size() + mesh.indices.size() / 3);\n\n\tsize_t pcount = meshopt_generateProvokingIndexBuffer(&pib[0], &reorder[0], &mesh.indices[0], mesh.indices.size(), mesh.vertices.size());\n\treorder.resize(pcount);\n\n\tdouble end = timestamp();\n\n\t// validate invariant: pib[i] == i/3 for provoking vertices\n\tfor (size_t i = 0; i < mesh.indices.size(); i += 3)\n\t\tassert(pib[i] == i / 3);\n\n\t// validate invariant: reorder[pib[x]] == ib[x] modulo triangle rotation\n\t// note: this is technically not promised by the interface (it may reorder triangles!), it just happens to hold right now\n\tfor (size_t i = 0; i < mesh.indices.size(); i += 3)\n\t{\n\t\tunsigned int a = mesh.indices[i + 0], b = mesh.indices[i + 1], c = mesh.indices[i + 2];\n\t\tunsigned int ra = reorder[pib[i + 0]], rb = reorder[pib[i + 1]], rc = reorder[pib[i + 2]];\n\n\t\tassert((a == ra && b == rb && c == rc) || (a == rb && b == rc && c == ra) || (a == rc && b == ra && c == rb));\n\t}\n\n\t// best case number of vertices: max(vertex count, triangle count), assuming non-redundant indexing (all vertices are used)\n\t// note: this is a lower bound, and it's not theoretically possible on some meshes;\n\t// for example, a union of a flat shaded cube (12t 24v) and a smooth shaded icosahedron (20t 12v) will have 36 vertices and 32 triangles\n\t// however, the best case for that union is 44 vertices (24 cube vertices + 20 icosahedron vertices due to provoking invariant)\n\tsize_t bestv = mesh.vertices.size() > mesh.indices.size() / 3 ? mesh.vertices.size() : mesh.indices.size() / 3;\n\n\tprintf(\"Provoking: %d triangles / %d vertices (+%.1f%% extra) in %.2f msec\\n\",\n\t int(mesh.indices.size() / 3), int(pcount), double(pcount) / double(bestv) * 100.0 - 100.0, (end - start) * 1000);\n}\n\nstatic int reindexCompare(void* context, unsigned int lhs, unsigned int rhs)\n{\n\tconst Vertex* vertices = static_cast(context);\n\tconst Vertex& lv = vertices[lhs];\n\tconst Vertex& rv = vertices[rhs];\n\n\tfloat ln = lv.nx * lv.nx + lv.ny * lv.ny + lv.nz * lv.nz;\n\tfloat rn = rv.nx * rv.nx + rv.ny * rv.ny + rv.nz * rv.nz;\n\n\t// 1/1024px UV tolerance, 3 degree normal tolerance\n\treturn fabsf(lv.tx - rv.tx) < 1e-3f &&\n\t fabsf(lv.ty - rv.ty) < 1e-3f &&\n\t (lv.nx * rv.nx + lv.ny * rv.ny + lv.nz * rv.nz >= 0.9986f * sqrtf(ln * rn));\n}\n\nvoid reindexFuzzy(const Mesh& mesh)\n{\n\tstd::vector pv(mesh.vertices.size());\n\tpackMesh(pv, mesh.vertices);\n\n\tstd::vector remap(mesh.vertices.size());\n\n\tdouble start = timestamp();\n\n\tsize_t up = meshopt_generateVertexRemap(&remap[0], &mesh.indices[0], mesh.indices.size(), &pv[0], mesh.vertices.size(), sizeof(PackedVertex));\n\n\tdouble middle = timestamp();\n\n\tsize_t uf = meshopt_generateVertexRemapCustom(&remap[0], &mesh.indices[0], mesh.indices.size(), &mesh.vertices[0].px, mesh.vertices.size(), sizeof(Vertex), reindexCompare, const_cast(&mesh.vertices[0]));\n\n\tdouble end = timestamp();\n\n\tprintf(\"ReindexQ : %d vertices => %d unique vertices in %.2f msec\\n\",\n\t int(mesh.vertices.size()), int(up), (middle - start) * 1000);\n\tprintf(\"ReindexF : %d vertices => %d unique vertices in %.2f msec\\n\",\n\t int(mesh.vertices.size()), int(uf), (end - middle) * 1000);\n}\n\nvoid coverage(const Mesh& mesh)\n{\n\tdouble start = timestamp();\n\n\tmeshopt_CoverageStatistics cs = meshopt_analyzeCoverage(&mesh.indices[0], mesh.indices.size(), &mesh.vertices[0].px, mesh.vertices.size(), sizeof(Vertex));\n\n\tdouble end = timestamp();\n\n\tprintf(\"Coverage : X %.1f%% Y %.1f%% Z %.1f%% in %.2f msec\\n\",\n\t cs.coverage[0] * 100, cs.coverage[1] * 100, cs.coverage[2] * 100, (end - start) * 1000);\n}\n\nvoid nanite(const std::vector& vertices, const std::vector& indices); // nanite.cpp\n\nbool loadMesh(Mesh& mesh, const char* path)\n{\n\tdouble start = timestamp();\n\tdouble middle;\n\tmesh = parseObj(path, middle);\n\tdouble end = timestamp();\n\n\tif (mesh.vertices.empty())\n\t{\n\t\tprintf(\"Mesh %s is empty, skipping\\n\", path);\n\t\treturn false;\n\t}\n\n\tprintf(\"# %s: %d vertices, %d triangles; read in %.2f msec; indexed in %.2f msec\\n\", path, int(mesh.vertices.size()), int(mesh.indices.size() / 3), (middle - start) * 1000, (end - middle) * 1000);\n\treturn true;\n}\n\nvoid processDeinterleaved(const char* path)\n{\n\t// Most algorithms in the library work out of the box with deinterleaved geometry, but some require slightly special treatment;\n\t// this code runs a simplified version of complete opt. pipeline using deinterleaved geo. There's no compression performed but you\n\t// can trivially run it by quantizing all elements and running meshopt_encodeVertexBuffer once for each vertex stream.\n\tfastObjMesh* obj = fast_obj_read(path);\n\tif (!obj)\n\t{\n\t\tprintf(\"Error loading %s: file not found\\n\", path);\n\t\treturn;\n\t}\n\n\tsize_t total_indices = 0;\n\n\tfor (unsigned int i = 0; i < obj->face_count; ++i)\n\t\ttotal_indices += 3 * (obj->face_vertices[i] - 2);\n\n\tstd::vector unindexed_pos(total_indices * 3);\n\tstd::vector unindexed_nrm(total_indices * 3);\n\tstd::vector unindexed_uv(total_indices * 2);\n\n\tsize_t vertex_offset = 0;\n\tsize_t index_offset = 0;\n\n\tfor (unsigned int i = 0; i < obj->face_count; ++i)\n\t{\n\t\tfor (unsigned int j = 0; j < obj->face_vertices[i]; ++j)\n\t\t{\n\t\t\tfastObjIndex gi = obj->indices[index_offset + j];\n\n\t\t\t// triangulate polygon on the fly; offset-3 is always the first polygon vertex\n\t\t\tif (j >= 3)\n\t\t\t{\n\t\t\t\tmemcpy(&unindexed_pos[(vertex_offset + 0) * 3], &unindexed_pos[(vertex_offset - 3) * 3], 3 * sizeof(float));\n\t\t\t\tmemcpy(&unindexed_nrm[(vertex_offset + 0) * 3], &unindexed_nrm[(vertex_offset - 3) * 3], 3 * sizeof(float));\n\t\t\t\tmemcpy(&unindexed_uv[(vertex_offset + 0) * 2], &unindexed_uv[(vertex_offset - 3) * 2], 2 * sizeof(float));\n\t\t\t\tmemcpy(&unindexed_pos[(vertex_offset + 1) * 3], &unindexed_pos[(vertex_offset - 1) * 3], 3 * sizeof(float));\n\t\t\t\tmemcpy(&unindexed_nrm[(vertex_offset + 1) * 3], &unindexed_nrm[(vertex_offset - 1) * 3], 3 * sizeof(float));\n\t\t\t\tmemcpy(&unindexed_uv[(vertex_offset + 1) * 2], &unindexed_uv[(vertex_offset - 1) * 2], 2 * sizeof(float));\n\t\t\t\tvertex_offset += 2;\n\t\t\t}\n\n\t\t\tmemcpy(&unindexed_pos[vertex_offset * 3], &obj->positions[gi.p * 3], 3 * sizeof(float));\n\t\t\tmemcpy(&unindexed_nrm[vertex_offset * 3], &obj->normals[gi.n * 3], 3 * sizeof(float));\n\t\t\tmemcpy(&unindexed_uv[vertex_offset * 2], &obj->texcoords[gi.t * 2], 2 * sizeof(float));\n\t\t\tvertex_offset++;\n\t\t}\n\n\t\tindex_offset += obj->face_vertices[i];\n\t}\n\n\tfast_obj_destroy(obj);\n\n\tdouble start = timestamp();\n\n\tmeshopt_Stream streams[] = {\n\t {&unindexed_pos[0], sizeof(float) * 3, sizeof(float) * 3},\n\t {&unindexed_nrm[0], sizeof(float) * 3, sizeof(float) * 3},\n\t {&unindexed_uv[0], sizeof(float) * 2, sizeof(float) * 2},\n\t};\n\n\tstd::vector remap(total_indices);\n\n\tsize_t total_vertices = meshopt_generateVertexRemapMulti(&remap[0], NULL, total_indices, total_indices, streams, sizeof(streams) / sizeof(streams[0]));\n\n\tstd::vector indices(total_indices);\n\tmeshopt_remapIndexBuffer(&indices[0], NULL, total_indices, &remap[0]);\n\n\tstd::vector pos(total_vertices * 3);\n\tmeshopt_remapVertexBuffer(&pos[0], &unindexed_pos[0], total_indices, sizeof(float) * 3, &remap[0]);\n\n\tstd::vector nrm(total_vertices * 3);\n\tmeshopt_remapVertexBuffer(&nrm[0], &unindexed_nrm[0], total_indices, sizeof(float) * 3, &remap[0]);\n\n\tstd::vector uv(total_vertices * 2);\n\tmeshopt_remapVertexBuffer(&uv[0], &unindexed_uv[0], total_indices, sizeof(float) * 2, &remap[0]);\n\n\tdouble reindex = timestamp();\n\n\tmeshopt_optimizeVertexCache(&indices[0], &indices[0], total_indices, total_vertices);\n\n\tmeshopt_optimizeVertexFetchRemap(&remap[0], &indices[0], total_indices, total_vertices);\n\tmeshopt_remapVertexBuffer(&pos[0], &pos[0], total_vertices, sizeof(float) * 3, &remap[0]);\n\tmeshopt_remapVertexBuffer(&nrm[0], &nrm[0], total_vertices, sizeof(float) * 3, &remap[0]);\n\tmeshopt_remapVertexBuffer(&uv[0], &uv[0], total_vertices, sizeof(float) * 2, &remap[0]);\n\n\tdouble optimize = timestamp();\n\n\t// note: since shadow index buffer is computed based on regular vertex/index buffer, the stream points at the indexed data - not unindexed_pos\n\tmeshopt_Stream shadow_stream = {&pos[0], sizeof(float) * 3, sizeof(float) * 3};\n\n\tstd::vector shadow_indices(total_indices);\n\tmeshopt_generateShadowIndexBufferMulti(&shadow_indices[0], &indices[0], total_indices, total_vertices, &shadow_stream, 1);\n\n\tmeshopt_optimizeVertexCache(&shadow_indices[0], &shadow_indices[0], total_indices, total_vertices);\n\n\tdouble shadow = timestamp();\n\n\tprintf(\"Deintrlvd: %d vertices, reindexed in %.2f msec, optimized in %.2f msec, generated & optimized shadow indices in %.2f msec\\n\",\n\t int(total_vertices), (reindex - start) * 1000, (optimize - reindex) * 1000, (shadow - optimize) * 1000);\n}\n\nvoid process(const char* path)\n{\n\tMesh mesh;\n\tif (!loadMesh(mesh, path))\n\t\treturn;\n\n\toptimize(mesh);\n\toptimize(mesh, /* fifo= */ true);\n\n\tMesh copy = mesh;\n\tmeshopt_optimizeVertexCache(©.indices[0], ©.indices[0], copy.indices.size(), copy.vertices.size());\n\tmeshopt_optimizeVertexFetch(©.vertices[0], ©.indices[0], copy.indices.size(), ©.vertices[0], copy.vertices.size(), sizeof(Vertex));\n\n\tMesh copystrip = mesh;\n\tmeshopt_optimizeVertexCacheStrip(©strip.indices[0], ©strip.indices[0], copystrip.indices.size(), copystrip.vertices.size());\n\tmeshopt_optimizeVertexFetch(©strip.vertices[0], ©strip.indices[0], copystrip.indices.size(), ©strip.vertices[0], copystrip.vertices.size(), sizeof(Vertex));\n\n\tstripify(copy, false, ' ');\n\tstripify(copy, /* use_restart= */ true, 'R');\n\tstripify(copystrip, /* use_restart= */ true, 'S');\n\n\tmeshlets(copy, /* scan= */ true);\n\tmeshlets(copy, /* scan= */ false);\n\tmeshlets(copy, /* scan= */ false, /* uniform= */ true);\n\tmeshlets(copy, /* scan= */ false, /* uniform= */ false, /* flex= */ true);\n\tmeshlets(copy, /* scan= */ false, /* uniform= */ true, /* flex= */ false, /* spatial= */ true);\n\n\tshadow(copy);\n\ttessellationAdjacency(copy);\n\tprovoking(copy);\n\n\tencodeIndex(copy, ' ');\n\tencodeIndex(copystrip, 'S');\n\n\tstd::vector strip(meshopt_stripifyBound(copystrip.indices.size()));\n\tstrip.resize(meshopt_stripify(&strip[0], ©strip.indices[0], copystrip.indices.size(), copystrip.vertices.size(), 0));\n\n\tencodeIndexSequence(strip, copystrip.vertices.size(), 'D');\n\n\tpackVertex(copy, \"\");\n\tencodeVertex(copy, \"\");\n\tencodeVertex(copy, \"O\");\n\n\tencodeMeshlets(mesh, 64, 96);\n\n\tsimplify(mesh);\n\tsimplify(mesh, 0.1f, meshopt_SimplifyPrune);\n\tsimplifyAttr(mesh);\n\tsimplifyAttr(mesh, 0.1f, meshopt_SimplifyPermissive);\n\tsimplifyUpdate(mesh);\n\tsimplifyUpdate(mesh, 0.1f, meshopt_SimplifyPermissive);\n\tsimplifySloppy(mesh);\n\tsimplifyComplete(mesh);\n\tsimplifyPoints(mesh);\n\tsimplifyClusters(mesh);\n\n\tspatialSort(mesh);\n\tspatialSortTriangles(mesh);\n\tspatialClusterPoints(mesh, 64);\n\n\treindexFuzzy(mesh);\n\tcoverage(mesh);\n\n\tif (path)\n\t\tprocessDeinterleaved(path);\n}\n\nvoid processDev(const char* path)\n{\n\tMesh mesh;\n\tif (!loadMesh(mesh, path))\n\t\treturn;\n\n\tencodeMeshlets(mesh, 32, 48);\n\tencodeMeshlets(mesh, 64, 64);\n\tencodeMeshlets(mesh, 64, 96);\n}\n\nvoid processNanite(const char* path)\n{\n\tMesh mesh;\n\tif (!loadMesh(mesh, path))\n\t\treturn;\n\n\tnanite(mesh.vertices, mesh.indices);\n}\n\nint main(int argc, char** argv)\n{\n\tvoid runTests();\n\n\tif (argc == 1)\n\t{\n\t\trunTests();\n\t}\n\telse\n\t{\n\t\tif (strcmp(argv[1], \"-d\") == 0)\n\t\t{\n\t\t\tfor (int i = 2; i < argc; ++i)\n\t\t\t\tprocessDev(argv[i]);\n\t\t}\n\t\telse if (strcmp(argv[1], \"-n\") == 0)\n\t\t{\n\t\t\tfor (int i = 2; i < argc; ++i)\n\t\t\t\tprocessNanite(argv[i]);\n\t\t}\n\t\telse\n\t\t{\n\t\t\tfor (int i = 1; i < argc; ++i)\n\t\t\t\tprocess(argv[i]);\n\n\t\t\trunTests();\n\t\t}\n\t}\n}\n" }, { "path": "demo/meshletdec.slang", "content": "/**\n * meshletdec.slang - an example GPU decoder for meshlet data encoded using meshopt_encodeMeshlet\n * This is intended to be used as a starting point for applications that want to decode meshlet data on the GPU.\n *\n * The shader exposes an entrypoint, decodeMeshlets, that decodes a set of meshlets; each meshlet is decoded independently,\n * and the output vertex/triangle data is written as uint32 per element (triangle data is written as 0xccbbaa).\n * This matches the output format for meshopt_decodeMeshlet with vertex_size=4 triangle_size=4. If alternative formats are\n * needed, the code should be changed to output them; note that for triangle data, it may make sense to output data to shared\n * memory to be able to use larger aligned 32-bit writes to global memory after that.\n *\n * Copyright (C) 2016-2026, by Arseny Kapoulkine (arseny.kapoulkine@gmail.com)\n * This code is distributed under the MIT License. See notice at the end of this file.\n */\n\nstruct MeshletDesc\n{\n\tuint stream_offset;\n\tuint output_offset;\n\tuint16_t encoded_size;\n\tuint8_t vertex_count;\n\tuint8_t triangle_count;\n};\n\n[[vk::binding(0)]]\nStructuredBuffer gStream : register(t0);\n[[vk::binding(1)]]\nStructuredBuffer gMeshlets : register(t1);\n[[vk::binding(2)]]\nRWStructuredBuffer gOutput : register(u2);\n[[vk::binding(3)]]\ncbuffer MeshletConfigCB : register(b3) { uint gMeshletCount; }\n\nuint decodeVertices(uint out_vertices, uint ctrl, uint data, uint bound, uint vertex_count)\n{\n\tuint last = ~0u;\n\n\tfor (uint i = 0; i < vertex_count; i += 4)\n\t{\n\t\tif (data > bound)\n\t\t\treturn ~0u;\n\n\t\tuint code4 = uint(gStream[ctrl + i / 4]);\n\n\t\tfor (int k = 0; k < 4; ++k)\n\t\t{\n\t\t\tint code = ((code4 >> k) & 1) | ((code4 >> (k + 3)) & 2);\n\t\t\tint length = code4 == 0xff ? 4 : code;\n\n\t\t\t// branchlessly read up to 4 bytes\n\t\t\tuint mask = (length == 4) ? ~0u : (1 << (8 * length)) - 1;\n\t\t\tuint v = (uint(gStream[data + 0]) | (uint(gStream[data + 1]) << 8) | (uint(gStream[data + 2]) << 16) | (uint(gStream[data + 3]) << 24)) & mask;\n\n\t\t\t// unzigzag + 1\n\t\t\tuint d = (v >> 1) ^ -int(v & 1);\n\t\t\tuint r = last + d + 1;\n\n\t\t\tif (i + k < vertex_count)\n\t\t\t\tgOutput[out_vertices + i + k] = r;\n\n\t\t\tdata += length;\n\t\t\tlast = r;\n\t\t}\n\t}\n\n\treturn data;\n}\n\nuint decodeTriangle(uint code, uint extra0, uint extra1, uint extra2, inout uint fifo0, inout uint fifo1, inout uint fifo2, inout uint next, inout uint extra)\n{\n\t// reuse: 0-1 extra vertices\n\tuint fifo = code < 4 ? fifo0 : (code < 8 ? fifo1 : fifo2);\n\tuint edge = fifo >> ((code << 3) & 16); // shift by 16 if bit 1 is set (odd edge for each triangle)\n\tuint c_reuse = (code & 1) == 1 ? extra0 : next;\n\n\t// restart: 0-3 extra vertices\n\tuint extran = code & 3;\n\tuint a = extran > 0 ? extra0 : next;\n\tuint b = extran > 1 ? extra1 : next + (1 - extran);\n\tuint c = extran > 2 ? extra2 : next + (2 - extran);\n\n\t// select between reuse and restart and repack triangle into edge format (0xcbac)\n\ta = code >= 12 ? a : (edge >> 8) & 0xff;\n\tb = code >= 12 ? b : edge & 0xff;\n\tc = code >= 12 ? c : c_reuse;\n\n\tuint tri = c | (a << 8) | (b << 16) | (c << 24);\n\n\t// advance next/extra; reuse codes use 1 lsb for extra count, restart codes use 2 lsbs\n\tuint extrab = code < 12 ? 1 : 3;\n\tnext += extrab - code & extrab;\n\textra += code & extrab;\n\n\t// rotate fifo\n\tfifo2 = fifo1;\n\tfifo1 = fifo0;\n\tfifo0 = tri;\n\n\t// output triangle is stored without extra edge vertex (0xcbac => 0xcba)\n\treturn tri >> 8;\n}\n\nuint decodeTriangles(uint out_triangles, uint codes, uint extra, uint bound, uint triangle_count)\n{\n\tuint next = 0;\n\tuint fifo0 = 0, fifo1 = 0, fifo2 = 0; // two edge fifo entries in one uint: 0xcbac\n\n\tfor (uint i = 0; i < triangle_count; i += 2)\n\t{\n\t\tif (extra > bound)\n\t\t\treturn ~0u;\n\n\t\tuint codeg = uint(gStream[codes + i / 2]);\n\n\t\t// first triangle\n\t\tuint extra0 = uint(gStream[extra + 0]);\n\t\tuint extra1 = uint(gStream[extra + 1]);\n\t\tuint extra2 = uint(gStream[extra + 2]);\n\t\tuint tri = decodeTriangle(codeg & 15, extra0, extra1, extra2, fifo0, fifo1, fifo2, next, extra);\n\n\t\tgOutput[out_triangles + i] = tri;\n\n\t\t// second triangle, if any\n\t\textra0 = uint(gStream[extra + 0]);\n\t\textra1 = uint(gStream[extra + 1]);\n\t\textra2 = uint(gStream[extra + 2]);\n\t\ttri = decodeTriangle(codeg >> 4, extra0, extra1, extra2, fifo0, fifo1, fifo2, next, extra);\n\n\t\tif (i + 1 < triangle_count)\n\t\t\tgOutput[out_triangles + i + 1] = tri;\n\t}\n\n\treturn extra;\n}\n\nint decodeMeshlet(uint out_vertices, uint vertex_count, uint out_triangles, uint triangle_count, uint buffer, uint buffer_size)\n{\n\tuint codes_size = (triangle_count + 1) / 2;\n\tuint ctrl_size = (vertex_count + 3) / 4;\n\tuint gap_size = (codes_size + ctrl_size < 16) ? 16 - (codes_size + ctrl_size) : 0;\n\n\tif (buffer_size < codes_size + ctrl_size + gap_size)\n\t\treturn -2;\n\n\tuint end = buffer + buffer_size;\n\tuint codes = end - codes_size;\n\tuint ctrl = codes - ctrl_size;\n\tuint data = buffer;\n\n\t// gap ensures we have at least 16 bytes available after bound; this allows decoder to over-read safely\n\tuint bound = ctrl - gap_size;\n\n\tdata = decodeVertices(out_vertices, ctrl, data, bound, vertex_count);\n\tif (data == ~0u)\n\t\treturn -2;\n\n\tdata = decodeTriangles(out_triangles, codes, data, bound, triangle_count);\n\tif (data == ~0u)\n\t\treturn -2;\n\n\treturn (data == bound) ? 0 : -3;\n}\n\n[shader(\"compute\")]\n[numthreads(32, 1, 1)]\nvoid decodeMeshlets(uint3 dispatch_thread_id: SV_DispatchThreadID)\n{\n\tuint meshlet_count = gMeshletCount;\n\n\tuint tid = dispatch_thread_id.x;\n\tif (tid >= meshlet_count)\n\t\treturn;\n\n\tMeshletDesc desc = gMeshlets[tid];\n\tuint out_vertices = desc.output_offset;\n\tuint out_triangles = desc.output_offset + uint(desc.vertex_count);\n\n\tint rc = decodeMeshlet(out_vertices, uint(desc.vertex_count), out_triangles, uint(desc.triangle_count), desc.stream_offset, uint(desc.encoded_size));\n\n\t// if decoding failed, we write 0xff.. to the first word of the output data\n\t// this can be adjusted arbitrarily; for example, a separate buffer with a single status for the entire stream could be used\n\t// note that decoding fails only if the input data is corrupt; so this may not be required at all depending on the requirements\n\tif (rc < 0)\n\t\tgOutput[desc.output_offset] = ~0u;\n}\n\n/**\n * Copyright (c) 2016-2026 Arseny Kapoulkine\n *\n * Permission is hereby granted, free of charge, to any person\n * obtaining a copy of this software and associated documentation\n * files (the \"Software\"), to deal in the Software without\n * restriction, including without limitation the rights to use,\n * copy, modify, merge, publish, distribute, sublicense, and/or sell\n * copies of the Software, and to permit persons to whom the\n * Software is furnished to do so, subject to the following\n * conditions:\n *\n * The above copyright notice and this permission notice shall be\n * included in all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND,\n * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES\n * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND\n * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT\n * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,\n * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR\n * OTHER DEALINGS IN THE SOFTWARE.\n */\n" }, { "path": "demo/nanite.cpp", "content": "// For reference, see the original Nanite paper:\n// Brian Karis. Nanite: A Deep Dive. 2021\n#include \"../src/meshoptimizer.h\"\n\n#include \n#include \n#include \n#include \n\n#include \n#include \n\n#define CLUSTERLOD_IMPLEMENTATION\n#include \"clusterlod.h\"\n\nstruct Vertex\n{\n\tfloat px, py, pz;\n\tfloat nx, ny, nz;\n\tfloat tx, ty;\n};\n\n// computes approximate (perspective) projection error of a cluster in screen space (0..1; multiply by screen height to get pixels)\n// camera_proj is projection[1][1], or cot(fovy/2); camera_znear is *positive* near plane distance\n// for DAG cut to be valid, boundsError must be monotonic: it must return a larger error for parent cluster\n// for simplicity, we ignore perspective distortion and use rotationally invariant projection size estimation\nstatic float boundsError(const clodBounds& bounds, float camera_x, float camera_y, float camera_z, float camera_proj, float camera_znear)\n{\n\tfloat dx = bounds.center[0] - camera_x, dy = bounds.center[1] - camera_y, dz = bounds.center[2] - camera_z;\n\tfloat d = sqrtf(dx * dx + dy * dy + dz * dz) - bounds.radius;\n\treturn bounds.error / (d > camera_znear ? d : camera_znear) * (camera_proj * 0.5f);\n}\n\nstatic int measureComponents(std::vector& parents, const std::vector& indices, const std::vector& remap);\nstatic size_t measureBoundary(std::vector& used, const std::vector >& clusters, const std::vector& remap);\nstatic float sahOverhead(const std::vector >& clusters, const std::vector& vertices);\n\nvoid dumpObj(const std::vector& vertices, const std::vector& indices, bool recomputeNormals = false);\nvoid dumpObj(const char* section, const std::vector& indices);\n\nvoid nanite(const std::vector& vertices, const std::vector& indices)\n{\n#ifdef _MSC_VER\n\tstatic const char* dump = NULL; // tired of C4996\n\tstatic const char* clrt = NULL;\n#else\n\tstatic const char* dump = getenv(\"DUMP\");\n\tstatic const char* clrt = getenv(\"CLRT\");\n#endif\n\n\tclodConfig config = clodDefaultConfig(/*max_triangles=*/128);\n\n\tif (clrt)\n\t{\n\t\tconfig = clodDefaultConfigRT(config.max_triangles);\n\t\tconfig.cluster_fill_weight = float(atof(clrt));\n\t}\n\n\tconst float attribute_weights[3] = {0.5f, 0.5f, 0.5f};\n\n\tclodMesh mesh = {};\n\tmesh.indices = indices.data();\n\tmesh.index_count = indices.size();\n\tmesh.vertex_count = vertices.size();\n\tmesh.vertex_positions = &vertices[0].px;\n\tmesh.vertex_positions_stride = sizeof(Vertex);\n\tmesh.vertex_attributes = &vertices[0].nx;\n\tmesh.vertex_attributes_stride = sizeof(Vertex);\n\tmesh.attribute_weights = attribute_weights;\n\tmesh.attribute_count = sizeof(attribute_weights) / sizeof(attribute_weights[0]);\n\tmesh.attribute_protect_mask = (1 << 3) | (1 << 4); // protect UV seams, maps to Vertex::tx/ty\n\n\tstruct Stats\n\t{\n\t\tsize_t groups;\n\t\tsize_t clusters;\n\t\tsize_t triangles;\n\t\tsize_t vertices;\n\n\t\tsize_t full_clusters;\n\t\tsize_t singleton_groups;\n\n\t\tsize_t stuck_clusters;\n\t\tsize_t stuck_triangles;\n\n\t\tdouble radius;\n\n\t\tstd::vector > indices; // for detailed connectivity analysis\n\t};\n\n\tstd::vector stats;\n\tstd::vector groups;\n\n\tstd::vector > cut;\n\tint cut_level = dump ? atoi(dump) : -2;\n\n\t// for testing purposes, we can compute a DAG cut from a given viewpoint and dump it as an OBJ\n\tfloat maxx = 0.f, maxy = 0.f, maxz = 0.f;\n\tfor (size_t i = 0; i < vertices.size(); ++i)\n\t{\n\t\tmaxx = std::max(maxx, vertices[i].px * 2);\n\t\tmaxy = std::max(maxy, vertices[i].py * 2);\n\t\tmaxz = std::max(maxz, vertices[i].pz * 2);\n\t}\n\n\tfloat threshold = 2e-3f; // 2 pixels at 1080p\n\tfloat fovy = 60.f;\n\tfloat znear = 1e-2f;\n\tfloat proj = 1.f / tanf(fovy * 3.1415926f / 180.f * 0.5f);\n\n\tclodBuild(config, mesh, [&](clodGroup group, const clodCluster* clusters, size_t cluster_count) -> int { // clang-format!\n\t\tif (stats.size() <= size_t(group.depth))\n\t\t\tstats.push_back({});\n\n\t\tStats& level = stats[group.depth];\n\n\t\tlevel.groups++;\n\t\tlevel.clusters += cluster_count;\n\t\tif (group.simplified.error == FLT_MAX)\n\t\t\tlevel.stuck_clusters += cluster_count;\n\t\tlevel.singleton_groups += cluster_count == 1;\n\n\t\tfor (size_t i = 0; i < cluster_count; ++i)\n\t\t{\n\t\t\tconst clodCluster& cluster = clusters[i];\n\n\t\t\tlevel.triangles += cluster.index_count / 3;\n\t\t\tif (group.simplified.error == FLT_MAX)\n\t\t\t\tlevel.stuck_triangles += cluster.index_count / 3;\n\t\t\tlevel.vertices += cluster.vertex_count;\n\n\t\t\tlevel.full_clusters += (cluster.index_count == config.max_triangles * 3);\n\t\t\tlevel.radius += cluster.bounds.radius;\n\n\t\t\tlevel.indices.push_back(std::vector(cluster.indices, cluster.indices + cluster.index_count));\n\n\t\t\t// when requesting DAG cut at a given level, we need to render all terminal clusters at lower depth as well\n\t\t\tif (cut_level >= 0 && (group.depth == cut_level || (group.depth < cut_level && group.simplified.error == FLT_MAX)))\n\t\t\t\tcut.push_back(std::vector(cluster.indices, cluster.indices + cluster.index_count));\n\n\t\t\t// when requesting DAG cut from a viewpoint, we need to check if each cluster is the least detailed cluster that passes the error threshold\n\t\t\tif (cut_level == -1 && (cluster.refined < 0 || boundsError(groups[cluster.refined], maxx, maxy, maxz, proj, znear) <= threshold) && boundsError(group.simplified, maxx, maxy, maxz, proj, znear) > threshold)\n\t\t\t\tcut.push_back(std::vector(cluster.indices, cluster.indices + cluster.index_count));\n\t\t}\n\n\t\tlevel.indices.push_back(std::vector()); // mark end of group for measureBoundary\n\n\t\tgroups.push_back(group.simplified);\n\t\treturn int(groups.size() - 1);\n\t});\n\n\t// for cluster connectivity analysis and boundary statistics, we need a position-only remap that maps vertices with the same position to the same index\n\tstd::vector remap(vertices.size());\n\tmeshopt_generatePositionRemap(&remap[0], &vertices[0].px, vertices.size(), sizeof(Vertex));\n\n\tstd::vector used(vertices.size());\n\n\tsize_t lowest_clusters = 0;\n\tsize_t lowest_triangles = 0;\n\n\tfor (size_t i = 0; i < stats.size(); ++i)\n\t{\n\t\tStats& level = stats[i];\n\n\t\tlowest_clusters += level.stuck_clusters;\n\t\tlowest_triangles += level.stuck_triangles;\n\n\t\tsize_t connected = 0;\n\t\tfor (const auto& cluster : level.indices)\n\t\t\tconnected += measureComponents(used, cluster, remap);\n\n\t\tsize_t boundary = measureBoundary(used, level.indices, remap);\n\t\tfloat saho = clrt ? sahOverhead(level.indices, vertices) : 0.f;\n\n\t\tdouble inv_clusters = 1.0 / double(level.clusters);\n\n\t\tprintf(\"lod %d: %d clusters (%.1f%% full, %.1f tri/cl, %.1f vtx/cl, %.2f connected, %.1f boundary, %.1f partition, %d singletons, %.3f sah overhead, %f radius), %d triangles\",\n\t\t int(i), int(level.clusters),\n\t\t double(level.full_clusters) * inv_clusters * 100, double(level.triangles) * inv_clusters, double(level.vertices) * inv_clusters,\n\t\t double(connected) * inv_clusters, double(boundary) * inv_clusters,\n\t\t double(level.clusters) / double(level.groups), int(level.singleton_groups),\n\t\t saho, level.radius * inv_clusters,\n\t\t int(level.triangles));\n\t\tif (level.stuck_clusters && level.clusters > 1)\n\t\t\tprintf(\"; stuck %d clusters (%d triangles)\", int(level.stuck_clusters), int(level.stuck_triangles));\n\t\tprintf(\"\\n\");\n\t}\n\n\tprintf(\"lowest lod: %d clusters, %d triangles\\n\", int(lowest_clusters), int(lowest_triangles));\n\n\tif (cut_level >= -1)\n\t{\n\t\tsize_t cut_tris = 0;\n\t\tfor (auto& cluster : cut)\n\t\t\tcut_tris += cluster.size() / 3;\n\n\t\tif (cut_level >= 0)\n\t\t\tprintf(\"cut (level %d): %d triangles\\n\", cut_level, int(cut_tris));\n\t\telse\n\t\t\tprintf(\"cut (error %.3f): %d triangles\\n\", threshold, int(cut_tris));\n\n\t\tdumpObj(vertices, std::vector());\n\n\t\tfor (auto& cluster : cut)\n\t\t\tdumpObj(\"cluster\", cluster);\n\t}\n}\n\n// What follows is code that is helpful for collecting metrics, visualizing cuts, etc.\n// This code is not used in the actual clustering implementation and can be ignored.\nstatic int follow(std::vector& parents, int index)\n{\n\twhile (index != parents[index])\n\t{\n\t\tint parent = parents[index];\n\t\tparents[index] = parents[parent];\n\t\tindex = parent;\n\t}\n\n\treturn index;\n}\n\nstatic int measureComponents(std::vector& parents, const std::vector& indices, const std::vector& remap)\n{\n\tassert(parents.size() == remap.size());\n\n\tfor (size_t i = 0; i < indices.size(); ++i)\n\t{\n\t\tunsigned int v = remap[indices[i]];\n\t\tparents[v] = v;\n\t}\n\n\tfor (size_t i = 0; i < indices.size(); ++i)\n\t{\n\t\tint v0 = remap[indices[i]];\n\t\tint v1 = remap[indices[i + (i % 3 == 2 ? -2 : 1)]];\n\n\t\tv0 = follow(parents, v0);\n\t\tv1 = follow(parents, v1);\n\n\t\tparents[v0] = v1;\n\t}\n\n\tfor (size_t i = 0; i < indices.size(); ++i)\n\t{\n\t\tunsigned int v = remap[indices[i]];\n\t\tparents[v] = follow(parents, v);\n\t}\n\n\tint roots = 0;\n\tfor (size_t i = 0; i < indices.size(); ++i)\n\t{\n\t\tunsigned int v = remap[indices[i]];\n\t\troots += parents[v] == int(v);\n\t\tparents[v] = -1; // make sure we only count each root once\n\t}\n\n\treturn roots;\n}\n\nstatic size_t measureBoundary(std::vector& used, const std::vector >& clusters, const std::vector& remap)\n{\n\tfor (size_t i = 0; i < used.size(); ++i)\n\t\tused[i] = -1;\n\n\t// mark vertices that are used by multiple groups with -2\n\tint group = 0;\n\n\tfor (size_t i = 0; i < clusters.size(); ++i)\n\t{\n\t\tgroup += clusters[i].empty();\n\n\t\tfor (size_t j = 0; j < clusters[i].size(); ++j)\n\t\t{\n\t\t\tunsigned int v = remap[clusters[i][j]];\n\n\t\t\tused[v] = (used[v] == -1 || used[v] == group) ? group : -2;\n\t\t}\n\t}\n\n\tsize_t result = 0;\n\n\tfor (size_t i = 0; i < clusters.size(); ++i)\n\t{\n\t\t// count vertices that are used by multiple groups and change marks to -1\n\t\tfor (size_t j = 0; j < clusters[i].size(); ++j)\n\t\t{\n\t\t\tunsigned int v = remap[clusters[i][j]];\n\n\t\t\tresult += (used[v] == -2);\n\t\t\tused[v] = (used[v] == -2) ? -1 : used[v];\n\t\t}\n\n\t\t// change marks back from -1 to -2 for the next pass\n\t\tfor (size_t j = 0; j < clusters[i].size(); ++j)\n\t\t{\n\t\t\tunsigned int v = remap[clusters[i][j]];\n\n\t\t\tused[v] = (used[v] == -1) ? -2 : used[v];\n\t\t}\n\t}\n\n\treturn int(result);\n}\n\nstruct Box\n{\n\tfloat min[3];\n\tfloat max[3];\n};\n\nstatic const Box kDummyBox = {{FLT_MAX, FLT_MAX, FLT_MAX}, {-FLT_MAX, -FLT_MAX, -FLT_MAX}};\n\nstatic void mergeBox(Box& box, const Box& other)\n{\n\tfor (int k = 0; k < 3; ++k)\n\t{\n\t\tbox.min[k] = other.min[k] < box.min[k] ? other.min[k] : box.min[k];\n\t\tbox.max[k] = other.max[k] > box.max[k] ? other.max[k] : box.max[k];\n\t}\n}\n\ninline float surface(const Box& box)\n{\n\tfloat sx = box.max[0] - box.min[0], sy = box.max[1] - box.min[1], sz = box.max[2] - box.min[2];\n\treturn sx * sy + sx * sz + sy * sz;\n}\n\nstatic float sahCost(const Box* boxes, unsigned int* order, unsigned int* temp, size_t count)\n{\n\tBox total = boxes[order[0]];\n\tfor (size_t i = 1; i < count; ++i)\n\t\tmergeBox(total, boxes[order[i]]);\n\n\tint best_axis = -1;\n\tint best_bin = -1;\n\tfloat best_cost = FLT_MAX;\n\n\tconst int kBins = 15;\n\n\tfor (int axis = 0; axis < 3; ++axis)\n\t{\n\t\tBox bins[kBins];\n\t\tunsigned int counts[kBins] = {};\n\n\t\tfloat extent = total.max[axis] - total.min[axis];\n\t\tif (extent <= 0.f)\n\t\t\tcontinue;\n\n\t\tfor (int i = 0; i < kBins; ++i)\n\t\t\tbins[i] = kDummyBox;\n\n\t\tfor (size_t i = 0; i < count; ++i)\n\t\t{\n\t\t\tunsigned int index = order[i];\n\t\t\tfloat p = (boxes[index].min[axis] + boxes[index].max[axis]) * 0.5f;\n\t\t\tint bin = int((p - total.min[axis]) / extent * (kBins - 1) + 0.5f);\n\t\t\tassert(bin >= 0 && bin < kBins);\n\n\t\t\tmergeBox(bins[bin], boxes[index]);\n\t\t\tcounts[bin]++;\n\t\t}\n\n\t\tBox laccum = kDummyBox, raccum = kDummyBox;\n\t\tsize_t lcount = 0, rcount = 0;\n\t\tfloat costs[kBins] = {};\n\n\t\tfor (int i = 0; i < kBins - 1; ++i)\n\t\t{\n\t\t\tmergeBox(laccum, bins[i]);\n\t\t\tmergeBox(raccum, bins[kBins - 1 - i]);\n\n\t\t\tlcount += counts[i];\n\t\t\tcosts[i] += lcount ? surface(laccum) * lcount : 0.f;\n\t\t\trcount += counts[kBins - 1 - i];\n\t\t\tcosts[kBins - 2 - i] += rcount ? surface(raccum) * rcount : 0.f;\n\t\t}\n\n\t\tfor (int i = 0; i < kBins - 1; ++i)\n\t\t\tif (costs[i] < best_cost)\n\t\t\t{\n\t\t\t\tbest_cost = costs[i];\n\t\t\t\tbest_bin = i;\n\t\t\t\tbest_axis = axis;\n\t\t\t}\n\t}\n\n\tif (best_axis == -1)\n\t\treturn surface(total) * float(count);\n\n\tfloat best_extent = total.max[best_axis] - total.min[best_axis];\n\n\tsize_t offset0 = 0, offset1 = count;\n\n\tfor (size_t i = 0; i < count; ++i)\n\t{\n\t\tunsigned int index = order[i];\n\t\tfloat p = (boxes[index].min[best_axis] + boxes[index].max[best_axis]) * 0.5f;\n\t\tint bin = int((p - total.min[best_axis]) / best_extent * (kBins - 1) + 0.5f);\n\t\tassert(bin >= 0 && bin < kBins);\n\n\t\tif (bin <= best_bin)\n\t\t\ttemp[offset0++] = index;\n\t\telse\n\t\t\ttemp[--offset1] = index;\n\t}\n\n\tassert(offset0 == offset1);\n\n\tif (offset0 == 0 || offset0 == count)\n\t\treturn surface(total) * float(count);\n\n\treturn surface(total) + sahCost(boxes, temp, order, offset0) + sahCost(boxes, temp + offset0, order + offset0, count - offset0);\n}\n\nstatic float sahCost(const Box* boxes, size_t count)\n{\n\tif (count == 0)\n\t\treturn 0.f;\n\n\tstd::vector order(count);\n\tfor (size_t i = 0; i < count; ++i)\n\t\torder[i] = unsigned(i);\n\n\tstd::vector temp(count);\n\treturn sahCost(boxes, &order[0], &temp[0], count);\n}\n\nstatic float sahOverhead(const std::vector >& clusters, const std::vector& vertices)\n{\n\tstd::vector all_tris, cluster_tris, cluster_boxes;\n\n\tfloat sahc = 0.f;\n\n\tfor (size_t i = 0; i < clusters.size(); ++i)\n\t{\n\t\tif (clusters[i].empty())\n\t\t\tcontinue;\n\n\t\tcluster_tris.clear();\n\n\t\tBox cluster_box = kDummyBox;\n\n\t\tfor (size_t k = 0; k < clusters[i].size(); k += 3)\n\t\t{\n\t\t\tBox box = kDummyBox;\n\n\t\t\tfor (int v = 0; v < 3; ++v)\n\t\t\t{\n\t\t\t\tconst Vertex& vertex = vertices[clusters[i][k + v]];\n\n\t\t\t\tBox p = {{vertex.px, vertex.py, vertex.pz}, {vertex.px, vertex.py, vertex.pz}};\n\t\t\t\tmergeBox(box, p);\n\t\t\t}\n\n\t\t\tmergeBox(cluster_box, box);\n\n\t\t\tall_tris.push_back(box);\n\t\t\tcluster_tris.push_back(box);\n\t\t}\n\n\t\tcluster_boxes.push_back(cluster_box);\n\n\t\tsahc += sahCost(&cluster_tris[0], cluster_tris.size());\n\t\tsahc -= surface(cluster_box); // box will be accounted for in tlas\n\t}\n\n\tsahc += sahCost(&cluster_boxes[0], cluster_boxes.size());\n\n\tfloat saht = sahCost(all_tris.data(), all_tris.size());\n\n\treturn sahc / saht;\n}\n" }, { "path": "demo/pirate.obj", "content": "# Blender v2.79 (sub 0) OBJ File: 'pirate.blend'\n# www.blender.org\n# Pirate by Clint Bellanger\n# https://opengameart.org/content/pirate\n# Distributed under CC-BY-SA 3.0\nmtllib 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0.5974 0.7709 0.2210\nvn -0.1685 -0.0062 0.9857\nvn -0.4398 -0.6721 0.5956\nvn -0.3967 -0.9172 -0.0357\nvn -0.0496 -0.6219 -0.7815\nvn 0.4032 0.1236 -0.9067\nvn 0.6385 0.5749 -0.5116\nvn 0.2400 0.5868 0.7733\nvn 0.5685 0.7945 0.2133\nvn -0.2135 -0.0171 0.9768\nvn -0.4756 -0.6876 0.5486\nvn -0.4152 -0.9088 -0.0402\nvn -0.0716 -0.6156 -0.7848\nvn 0.3941 0.1769 -0.9019\nvn 0.6174 0.6261 -0.4762\nvn 0.1930 0.6250 0.7564\nvn 0.4967 0.8361 0.2327\nvn -0.2468 0.0142 0.9689\nvn -0.5123 -0.6868 0.5157\nvn -0.4545 -0.8877 -0.0728\nvn -0.1032 -0.5467 -0.8309\nvn 0.3741 0.2477 -0.8937\nvn 0.5754 0.6948 -0.4315\nvn 0.6893 0.6571 0.3049\nvn 0.7006 0.6366 0.3222\nvn 0.3961 0.3886 0.8319\nvn 0.3672 0.4369 0.8211\nvn 0.0166 -0.2036 0.9789\nvn -0.0527 -0.1498 0.9873\nvn -0.2679 -0.8050 0.5293\nvn -0.3432 -0.7831 0.5185\nvn -0.2604 -0.9629 -0.0707\nvn -0.3268 -0.9419 -0.0771\nvn 0.1134 -0.6437 -0.7568\nvn 0.0390 -0.6161 -0.7867\nvn 0.5643 0.1326 -0.8148\nvn 0.5172 0.1429 -0.8438\nvn 0.7632 0.5405 -0.3542\nvn 0.7468 0.5476 -0.3773\nvn 0.7050 0.6152 0.3528\nvn 0.4188 0.3402 0.8419\nvn 0.0831 -0.2227 0.9713\nvn -0.1923 -0.7967 0.5729\nvn -0.2002 -0.9780 -0.0580\nvn 0.1858 -0.6495 -0.7373\nvn 0.6026 0.1249 -0.7882\nvn 0.7770 0.5413 -0.3211\nusemtl Cornea\ns 1\nf 268/1/1 269/2/2 270/3/3 267/4/4\nf 267/4/4 270/3/3 271/5/5 266/6/6\nf 266/6/6 271/5/5 272/7/7 265/8/8\nf 271/5/5 274/9/9 273/10/10 272/7/7\nf 270/3/3 275/11/11 274/9/9 271/5/5\nf 269/2/2 276/12/12 275/11/11 270/3/3\nf 276/12/12 277/13/13 278/14/14 275/11/11\nf 275/11/11 278/14/14 279/15/15 274/9/9\nf 274/9/9 279/15/15 280/16/16 273/10/10\nf 279/15/15 282/17/17 281/18/18 280/16/16\nf 278/14/14 283/19/19 282/17/17 279/15/15\nf 277/13/13 284/20/20 283/19/19 278/14/14\nf 284/20/20 285/21/21 286/22/22 283/19/19\nf 283/19/19 286/22/22 287/23/23 282/17/17\nf 282/17/17 287/23/23 288/24/24 281/18/18\nf 287/23/23 290/25/25 289/26/26 288/24/24\nf 286/22/22 291/27/27 290/25/25 287/23/23\nf 285/21/21 292/28/28 291/27/27 286/22/22\nf 292/28/28 293/29/29 294/30/30 291/27/27\nf 291/27/27 294/30/30 295/31/31 290/25/25\nf 290/25/25 295/31/31 296/32/32 289/26/26\nf 295/31/31 266/6/6 265/8/8 296/32/32\nf 294/30/30 267/4/4 266/6/6 295/31/31\nf 293/29/29 268/1/1 267/4/4 294/30/30\nf 300/33/7 326/34/8 327/35/6 299/36/5\nf 299/36/5 327/35/6 328/37/4 298/38/3\nf 298/38/3 328/37/4 329/39/1 297/40/2\nf 303/41/11 298/38/3 297/40/2 304/42/12\nf 302/43/33 299/36/5 298/38/3 303/41/11\nf 301/44/10 300/33/7 299/36/5 302/43/33\nf 308/45/16 301/44/10 302/43/33 307/46/15\nf 307/46/15 302/43/33 303/41/11 306/47/14\nf 306/47/14 303/41/11 304/42/12 305/48/13\nf 312/49/19 306/47/14 305/48/13 313/50/20\nf 311/51/17 307/46/15 306/47/14 312/49/19\nf 310/52/18 308/45/16 307/46/15 311/51/17\nf 317/53/24 310/52/18 311/51/17 316/54/23\nf 316/54/23 311/51/17 312/49/19 315/55/22\nf 315/55/22 312/49/19 313/50/20 314/56/21\nf 320/57/27 315/55/22 314/56/21 321/58/28\nf 319/59/25 316/54/23 315/55/22 320/57/27\nf 318/60/26 317/53/24 316/54/23 319/59/25\nf 325/61/32 318/60/26 319/59/25 324/62/31\nf 324/62/31 319/59/25 320/57/27 323/63/30\nf 323/63/30 320/57/27 321/58/28 322/64/29\nf 328/37/4 323/63/30 322/64/29 329/39/1\nf 327/35/6 324/62/31 323/63/30 328/37/4\nf 326/34/8 325/61/32 324/62/31 327/35/6\nusemtl Iris\nf 272/7/7 264/65/34 265/8/8\nf 273/10/10 264/65/34 272/7/7\nf 280/16/16 264/65/34 273/10/10\nf 281/18/18 264/65/34 280/16/16\nf 288/24/24 264/65/34 281/18/18\nf 289/26/26 264/65/34 288/24/24\nf 296/32/32 264/65/34 289/26/26\nf 265/8/8 264/65/34 296/32/32\nf 309/66/34 326/34/8 300/33/7\nf 309/66/34 300/33/7 301/44/10\nf 309/66/34 301/44/10 308/45/16\nf 309/66/34 308/45/16 310/52/18\nf 309/66/34 310/52/18 317/53/24\nf 309/66/34 317/53/24 318/60/26\nf 309/66/34 318/60/26 325/61/32\nf 309/66/34 325/61/32 326/34/8\nusemtl Leather\nf 17/67/35 22/68/36 24/69/37 20/70/38\nf 22/68/36 18/71/39 21/72/40 24/69/37\nf 23/73/41 16/74/42 25/75/43 26/76/44\nf 19/77/45 23/73/41 26/76/44 27/78/46\nf 16/74/42 28/79/47 30/80/48 25/75/43\nf 28/79/47 32/81/49 31/82/50 30/80/48\nf 31/82/50 32/81/49 34/83/51 33/84/52\nf 33/85/52 34/86/51 36/87/53 35/88/54\nf 35/88/54 36/87/53 38/89/55 37/90/56\nf 19/77/45 27/78/46 37/90/56 38/89/55\nf 17/67/35 20/70/38 40/91/57 29/92/58\nf 18/71/39 39/93/59 41/94/60 21/72/40\nf 21/72/40 41/94/60 42/95/61 24/69/37\nf 20/70/38 24/69/37 42/95/61 40/91/57\nf 32/81/49 28/79/47 2661/96/62 2662/97/63\nf 34/83/51 32/81/49 2662/97/63 2663/98/64\nf 36/87/53 34/86/51 2663/99/64 2664/100/65\nf 38/89/55 36/87/53 2664/100/65 2665/101/66\nf 29/92/58 40/91/57 2667/102/67 2666/103/68\nf 41/94/60 39/93/59 2668/104/69 2669/105/70\nf 42/95/61 41/94/60 2669/105/70 2670/106/71\nf 40/91/57 42/95/61 2670/106/71 2667/102/67\nf 45/107/72 43/108/73 2671/109/74 2672/110/75\nf 46/111/76 45/107/72 2672/110/75 2673/112/76\nf 47/113/77 46/114/76 2673/115/76 2674/116/78\nf 48/117/79 47/113/77 2674/116/78 2675/118/80\nf 44/119/81 50/120/76 2677/121/76 2676/122/82\nf 51/123/76 49/124/83 2678/125/84 2679/126/76\nf 52/127/76 51/123/76 2679/126/76 2680/128/76\nf 50/120/76 52/129/76 2680/130/76 2677/121/76\nf 55/131/85 53/132/86 2681/133/87 2684/134/88\nf 56/135/89 55/131/85 2684/134/88 2685/136/89\nf 57/137/90 56/138/89 2685/139/89 2686/140/91\nf 58/141/92 57/137/90 2686/140/91 2687/142/93\nf 54/143/94 60/144/95 2691/145/96 2690/146/97\nf 61/147/98 59/148/99 2692/149/100 2693/150/101\nf 62/151/102 61/147/98 2693/150/101 2694/152/102\nf 60/144/95 62/153/102 2694/152/102 2691/145/96\nf 65/154/103 2682/155/104 2695/156/104 2697/157/105\nf 66/158/89 65/154/103 2697/157/105 2698/159/89\nf 67/160/106 66/161/89 2698/159/89 2699/162/107\nf 2688/163/108 67/160/106 2699/162/107 2700/164/108\nf 2696/165/109 2701/166/109 76/167/110 74/168/111\nf 74/168/111 76/167/110 75/169/112\nf 2683/170/113 2689/171/113 77/172/113 73/173/113\nf 63/174/114 70/175/115 71/176/116 69/177/117\nf 70/175/115 72/178/112 71/176/116\nf 78/179/118 16/74/42 23/73/41 80/180/119\nf 80/180/119 22/68/36 17/67/35 78/179/118\nf 19/77/45 79/181/120 80/180/119 23/73/41\nf 79/181/120 18/71/39 22/68/36 80/180/119\nf 16/74/42 78/179/118 81/182/121 28/79/47\nf 78/179/118 17/67/35 29/92/58 81/182/121\nf 18/71/39 79/181/120 82/183/122 39/93/59\nf 79/181/120 19/77/45 38/89/55 82/183/122\nf 28/79/47 81/182/121 2702/184/123 2661/96/62\nf 81/182/121 29/92/58 2666/103/68 2702/184/123\nf 39/93/59 82/183/122 2703/185/124 2668/104/69\nf 82/183/122 38/89/55 2665/101/66 2703/185/124\nf 43/108/73 83/186/125 2704/187/126 2671/109/74\nf 83/186/125 44/119/81 2676/122/82 2704/187/126\nf 49/124/83 84/188/127 2705/189/128 2678/125/84\nf 84/188/127 48/117/79 2675/118/80 2705/189/128\nf 53/132/86 85/190/129 2706/191/130 2681/133/87\nf 85/190/129 54/143/94 2690/146/97 2706/191/130\nf 59/148/99 86/192/131 2707/193/132 2692/149/100\nf 86/192/131 58/141/92 2687/142/93 2707/193/132\nf 69/177/117 88/194/133 87/195/134 63/174/114\nf 88/194/133 68/196/135 64/197/135 87/195/134\nf 26/76/44 25/75/43 89/198/136 90/199/137\nf 27/78/46 26/76/44 90/199/137 91/200/138\nf 25/75/43 30/80/48 92/201/139 89/198/136\nf 30/80/48 31/82/50 93/202/140 92/201/139\nf 31/82/50 33/84/52 94/203/141 93/202/140\nf 33/85/52 35/88/54 95/204/142 94/205/141\nf 35/88/54 37/90/56 96/206/143 95/204/142\nf 37/90/56 27/78/46 91/200/138 96/206/143\nf 90/199/137 89/198/136 98/207/144 97/208/145\nf 91/200/138 90/199/137 97/208/145 99/209/146\nf 89/198/136 92/201/139 100/210/147 98/207/144\nf 92/201/139 93/202/140 101/211/148 100/210/147\nf 93/202/140 94/203/141 102/212/149 101/211/148\nf 94/205/141 95/204/142 103/213/150 102/214/149\nf 95/204/142 96/206/143 104/215/151 103/213/150\nf 96/206/143 91/200/138 99/209/146 104/215/151\nf 97/208/145 98/207/144 106/216/152 105/217/153\nf 99/209/146 97/208/145 105/217/153 107/218/154\nf 98/207/144 100/210/147 108/219/155 106/216/152\nf 100/210/147 101/211/148 109/220/156 108/219/155\nf 101/211/148 102/212/149 110/221/157 109/220/156\nf 102/214/149 103/213/150 111/222/158 110/223/157\nf 103/213/150 104/215/151 112/224/159 111/222/158\nf 104/215/151 99/209/146 107/218/154 112/224/159\nf 154/225/160 116/226/161 117/227/162 151/228/163\nf 154/225/160 153/229/164 118/230/165 116/226/161\nf 153/229/164 2708/231/166 119/232/167 118/230/165\nf 2708/233/166 2709/234/168 120/235/169 119/236/167\nf 2709/234/168 152/237/170 121/238/171 120/235/169\nf 152/237/170 150/239/172 122/240/173 121/238/171\nf 151/228/163 117/227/162 123/241/174 2715/242/175\nf 150/239/172 2715/242/175 123/241/174 122/240/173\nf 116/226/161 124/243/176 125/244/177 117/227/162\nf 116/226/161 118/230/165 126/245/178 124/243/176\nf 118/230/165 119/232/167 127/246/179 126/245/178\nf 119/236/167 120/235/169 128/247/180 127/248/179\nf 120/235/169 121/238/171 129/249/181 128/247/180\nf 121/238/171 122/240/173 130/250/182 129/249/181\nf 117/227/162 125/244/177 131/251/183 123/241/174\nf 122/240/173 123/241/174 131/251/183 130/250/182\nf 124/243/176 142/252/184 141/253/185 125/244/177\nf 142/252/184 132/254/186 133/255/187 141/253/185\nf 126/245/178 143/256/188 142/252/184 124/243/176\nf 143/256/188 134/257/189 132/254/186 142/252/184\nf 129/249/181 145/258/190 144/259/191 128/247/180\nf 145/258/190 136/260/192 135/261/193 144/259/191\nf 130/250/182 146/262/194 145/258/190 129/249/181\nf 146/262/194 137/263/195 136/260/192 145/258/190\nf 125/244/177 141/253/185 147/264/196 131/251/183\nf 141/253/185 133/255/187 138/265/197 147/264/196\nf 131/251/183 147/264/196 146/262/194 130/250/182\nf 147/264/196 138/265/197 137/263/195 146/262/194\nf 128/247/180 144/259/191 148/266/198 127/248/179\nf 144/259/191 135/261/193 139/267/199 148/266/198\nf 127/246/179 149/268/200 143/256/188 126/245/178\nf 149/268/200 140/269/201 134/257/189 143/256/188\nf 105/217/153 106/216/152 2710/270/202 115/271/203\nf 107/218/154 105/217/153 115/271/203 2714/272/204\nf 106/216/152 108/219/155 2711/273/205 2710/270/202\nf 108/219/155 109/220/156 114/274/206 2711/273/205\nf 109/220/156 110/221/157 113/275/207 114/274/206\nf 110/223/157 111/222/158 2712/276/208 113/277/207\nf 111/222/158 112/224/159 2713/278/209 2712/276/208\nf 112/224/159 107/218/154 2714/272/204 2713/278/209\nf 173/279/210 174/280/211 156/281/212 155/282/213\nf 157/283/214 156/281/212 174/280/211 175/284/215\nf 158/285/216 157/283/214 175/284/215 176/286/217\nf 159/287/218 158/285/216 176/286/217 177/288/219\nf 160/289/220 159/287/218 177/288/219 178/290/221\nf 161/291/222 160/289/220 178/290/221 179/292/223\nf 162/293/224 161/291/222 179/292/223 180/294/225\nf 163/295/226 162/293/224 180/294/225 181/296/227\nf 164/297/228 163/295/226 181/296/227 182/298/229\nf 165/299/230 164/297/228 182/298/229 183/300/231\nf 166/301/232 165/299/230 183/300/231 184/302/233\nf 167/303/234 166/301/232 184/302/233 185/304/235\nf 168/305/236 167/303/234 185/304/235 186/306/237\nf 169/307/238 168/305/236 186/306/237 187/308/239\nf 170/309/240 169/307/238 187/308/239 188/310/241\nf 171/311/242 170/309/240 188/310/241 189/312/243\nf 172/313/244 171/311/242 189/312/243 190/314/245\nf 172/313/244 190/314/245 173/279/210 155/282/213\nf 174/280/211 173/279/210 192/315/246 191/316/247\nf 175/284/215 174/280/211 191/316/247 193/317/248\nf 176/286/217 175/284/215 193/317/248 194/318/249\nf 177/288/219 176/286/217 194/318/249 195/319/250\nf 178/290/221 177/288/219 195/319/250 196/320/251\nf 179/292/223 178/290/221 196/320/251 197/321/252\nf 180/294/225 179/292/223 197/321/252 198/322/253\nf 181/296/227 180/294/225 198/322/253 199/323/254\nf 182/298/229 181/296/227 199/323/254 200/324/255\nf 183/300/231 182/298/229 200/324/255 201/325/256\nf 184/302/233 183/300/231 201/325/256 202/326/257\nf 185/304/235 184/302/233 202/326/257 203/327/258\nf 186/306/237 185/304/235 203/327/258 204/328/259\nf 187/308/239 186/306/237 204/328/259 205/329/260\nf 188/310/241 187/308/239 205/329/260 206/330/261\nf 189/312/243 188/310/241 206/330/261 207/331/262\nf 190/314/245 189/312/243 207/331/262 208/332/263\nf 190/314/245 208/332/263 192/315/246 173/279/210\nf 191/316/247 192/315/246 209/333/264\nf 193/317/248 191/316/247 209/333/264\nf 194/318/249 193/317/248 209/333/264\nf 195/319/250 194/318/249 209/333/264\nf 196/320/251 195/319/250 209/333/264\nf 197/321/252 196/320/251 209/333/264\nf 198/322/253 197/321/252 209/333/264\nf 199/323/254 198/322/253 209/333/264\nf 200/324/255 199/323/254 209/333/264\nf 201/325/256 200/324/255 209/333/264\nf 202/326/257 201/325/256 209/333/264\nf 203/327/258 202/326/257 209/333/264\nf 204/328/259 203/327/258 209/333/264\nf 205/329/260 204/328/259 209/333/264\nf 206/330/261 205/329/260 209/333/264\nf 207/331/262 206/330/261 209/333/264\nf 208/332/263 207/331/262 209/333/264\nf 208/332/263 209/333/264 192/315/246\nf 170/309/240 171/311/242 220/334/265 221/335/266\nf 169/307/238 170/309/240 221/335/266 222/336/267\nf 168/305/236 169/307/238 222/336/267 213/337/268\nf 171/311/242 172/313/244 219/338/269 220/334/265\nf 155/282/213 218/339/270 219/338/269 172/313/244\nf 155/282/213 156/281/212 211/340/271 218/339/270\nf 156/281/212 157/283/214 223/341/272 211/340/271\nf 157/283/214 158/285/216 224/342/273 223/341/272\nf 158/285/216 159/287/218 225/343/274 224/342/273\nf 159/287/218 160/289/220 226/344/275 225/343/274\nf 160/289/220 161/291/222 227/345/276 226/344/275\nf 161/291/222 162/293/224 212/346/277 227/345/276\nf 162/293/224 163/295/226 228/347/278 212/346/277\nf 163/295/226 164/297/228 229/348/279 228/347/278\nf 164/297/228 165/299/230 230/349/280 229/348/279\nf 165/299/230 166/301/232 231/350/281 230/349/280\nf 166/301/232 167/303/234 232/351/282 231/350/281\nf 167/303/234 168/305/236 213/337/268 232/351/282\nf 235/352/283 234/353/284 214/354/285\nf 222/336/267 213/337/268 234/353/284 235/352/283\nf 214/354/285 215/355/286 236/356/287 235/352/283\nf 235/352/283 236/356/287 221/335/266 222/336/267\nf 215/355/286 216/357/288 237/358/289 236/356/287\nf 236/356/287 237/358/289 220/334/265 221/335/266\nf 216/357/288 217/359/290 238/360/291 237/358/289\nf 237/358/289 238/360/291 219/338/269 220/334/265\nf 217/359/290 210/361/292 239/362/293 238/360/291\nf 238/360/291 239/362/293 218/339/270 219/338/269\nf 233/363/294 239/362/293 210/361/292\nf 211/340/271 218/339/270 239/362/293 233/363/294\nf 212/346/277 227/345/276 240/364/295 246/365/296\nf 246/365/296 240/364/295 251/366/297\nf 241/367/298 240/364/295 227/345/276 226/344/275\nf 247/368/299 251/366/297 240/364/295 241/367/298\nf 242/369/300 241/367/298 226/344/275 225/343/274\nf 248/370/301 247/368/299 241/367/298 242/369/300\nf 243/371/302 242/369/300 225/343/274 224/342/273\nf 249/372/303 248/370/301 242/369/300 243/371/302\nf 244/373/304 243/371/302 224/342/273 223/341/272\nf 250/374/305 249/372/303 243/371/302 244/373/304\nf 223/341/272 211/340/271 245/375/306 244/373/304\nf 244/373/304 245/375/306 250/374/305\nf 259/376/307 258/377/308 253/378/309\nf 228/347/278 212/346/277 258/377/308 259/376/307\nf 253/378/309 254/379/310 260/380/311 259/376/307\nf 259/376/307 260/380/311 229/348/279 228/347/278\nf 254/379/310 255/381/312 261/382/313 260/380/311\nf 260/380/311 261/382/313 230/349/280 229/348/279\nf 255/381/312 256/383/314 262/384/315 261/382/313\nf 261/382/313 262/384/315 231/350/281 230/349/280\nf 256/383/314 252/385/316 263/386/317 262/384/315\nf 262/384/315 263/386/317 232/351/282 231/350/281\nf 257/387/318 263/386/317 252/385/316\nf 213/337/268 232/351/282 263/386/317 257/387/318\nf 2717/388/319 2716/389/320 2740/390/321 2741/391/322\nf 2718/392/323 2717/388/319 2741/391/322 2742/393/324\nf 2718/392/323 2742/393/324 2743/394/325 2719/395/326\nf 2719/395/326 2743/394/325 2744/396/327 2720/397/328\nf 2721/398/329 2720/397/328 2744/396/327 2745/399/330\nf 2721/398/329 2745/399/330 2746/400/331 2722/401/332\nf 2722/401/332 2746/400/331 2747/402/333 2723/403/334\nf 2723/403/334 2747/402/333 2748/404/335 2724/405/336\nf 2724/405/336 2748/404/335 2749/406/337 2725/407/338\nf 2726/408/339 2725/407/338 2749/406/337 2750/409/340\nf 2727/410/341 2726/411/339 2750/412/340 2751/413/342\nf 2728/414/343 2727/410/341 2751/413/342 2752/415/344\nf 2728/414/343 2752/415/344 2753/416/345 2729/417/346\nf 2729/417/346 2753/416/345 2754/418/347 2730/419/348\nf 2730/419/348 2754/418/347 2755/420/349 2731/421/350\nf 2732/422/351 2731/421/350 2755/420/349 2756/423/352\nf 2732/422/351 2756/423/352 2757/424/353 2733/425/354\nf 2734/426/355 2733/425/354 2757/424/353 2758/427/356\nf 2735/428/357 2734/426/355 2758/427/356 2759/429/358\nf 2736/430/359 2735/428/357 2759/429/358 2760/431/360\nf 2736/430/359 2760/431/360 2761/432/361 2737/433/362\nf 2738/434/363 2737/433/362 2761/432/361 2762/435/364\nf 2739/436/365 2738/434/363 2762/435/364 2763/437/366\nf 2740/390/321 2716/389/320 2739/436/365 2763/437/366\nf 500/438/367 499/439/368 523/440/369 524/441/370\nf 501/442/371 500/438/367 524/441/370 525/443/372\nf 502/444/373 501/442/371 525/443/372 526/445/374\nf 503/446/375 502/444/373 526/445/374 527/447/376\nf 504/448/377 503/446/375 527/447/376 528/449/378\nf 505/450/379 504/448/377 528/449/378 529/451/380\nf 506/452/381 505/450/379 529/451/380 530/453/382\nf 507/454/383 506/452/381 530/453/382 531/455/384\nf 508/456/385 507/454/383 531/455/384 532/457/386\nf 509/458/387 508/456/385 532/457/386 533/459/388\nf 510/460/389 509/461/387 533/462/388 534/463/390\nf 511/464/391 510/460/389 534/463/390 535/465/392\nf 512/466/393 511/464/391 535/465/392 536/467/393\nf 513/468/394 512/466/393 536/467/393 537/469/395\nf 514/470/396 513/468/394 537/469/395 538/471/397\nf 515/472/398 514/470/396 538/471/397 539/473/399\nf 516/474/400 515/472/398 539/473/399 540/475/401\nf 517/476/402 516/474/400 540/475/401 541/477/403\nf 518/478/404 517/476/402 541/477/403 542/479/405\nf 519/480/406 518/478/404 542/479/405 543/481/407\nf 520/482/408 519/480/406 543/481/407 544/483/409\nf 521/484/410 520/482/408 544/483/409 545/485/411\nf 522/486/412 521/484/410 545/485/411 546/487/413\nf 499/439/368 522/486/412 546/487/413 523/440/369\nf 475/488/414 476/489/415 548/490/416 547/491/417\nf 476/489/415 477/492/418 549/493/419 548/490/416\nf 477/492/418 478/494/420 550/495/421 549/493/419\nf 478/494/420 479/496/422 551/497/423 550/495/421\nf 479/496/422 480/498/424 552/499/425 551/497/423\nf 480/498/424 481/500/426 553/501/427 552/499/425\nf 481/500/426 482/502/428 554/503/429 553/501/427\nf 482/502/428 483/504/430 555/505/431 554/503/429\nf 483/504/430 484/506/432 556/507/433 555/505/431\nf 484/506/432 485/508/434 557/509/435 556/507/433\nf 485/510/434 486/511/436 558/512/437 557/513/435\nf 486/511/436 487/514/438 559/515/439 558/512/437\nf 487/514/438 488/516/440 560/517/441 559/515/439\nf 488/516/440 489/518/442 561/519/443 560/517/441\nf 489/518/442 490/520/444 562/521/445 561/519/443\nf 490/520/444 491/522/446 563/523/447 562/521/445\nf 491/522/446 492/524/448 564/525/449 563/523/447\nf 492/524/448 493/526/450 565/527/451 564/525/449\nf 493/526/450 494/528/452 566/529/453 565/527/451\nf 494/528/452 495/530/454 567/531/455 566/529/453\nf 495/530/454 496/532/456 568/533/457 567/531/455\nf 496/532/456 497/534/458 569/535/459 568/533/457\nf 497/534/458 498/536/460 570/537/461 569/535/459\nf 498/536/460 475/488/414 547/491/417 570/537/461\nf 572/538/462 575/539/463 579/540/464 577/541/465\nf 577/541/465 579/540/464 576/542/466 573/543/467\nf 580/544/468 571/545/469 578/546/470 581/547/471\nf 574/548/472 582/549/473 581/547/471 578/546/470\nf 571/545/469 580/544/468 585/550/474 583/551/475\nf 583/551/475 585/550/474 586/552/476 587/553/477\nf 586/552/476 588/554/478 589/555/479 587/553/477\nf 588/556/478 590/557/480 591/558/481 589/559/479\nf 590/557/480 592/560/482 593/561/483 591/558/481\nf 574/548/472 593/561/483 592/560/482 582/549/473\nf 572/538/462 584/562/484 595/563/485 575/539/463\nf 573/543/467 576/542/466 596/564/486 594/565/487\nf 576/542/466 579/540/464 597/566/488 596/564/486\nf 575/539/463 595/563/485 597/566/488 579/540/464\nf 587/553/477 2765/567/489 2764/568/490 583/551/475\nf 589/555/479 2766/569/491 2765/567/489 587/553/477\nf 591/558/481 2767/570/492 2766/571/491 589/559/479\nf 593/561/483 2768/572/493 2767/570/492 591/558/481\nf 584/562/484 2769/573/494 2770/574/495 595/563/485\nf 596/564/486 2772/575/496 2771/576/497 594/565/487\nf 597/566/488 2773/577/498 2772/575/496 596/564/486\nf 595/563/485 2770/574/495 2773/577/498 597/566/488\nf 600/578/499 2775/579/500 2774/580/501 598/581/502\nf 601/582/76 2776/583/76 2775/579/500 600/578/499\nf 602/584/503 2777/585/504 2776/586/76 601/587/76\nf 603/588/505 2778/589/506 2777/585/504 602/584/503\nf 599/590/507 2779/591/508 2780/592/76 605/593/76\nf 606/594/76 2782/595/76 2781/596/509 604/597/510\nf 607/598/76 2783/599/76 2782/595/76 606/594/76\nf 605/593/76 2780/592/76 2783/600/76 607/601/76\nf 610/602/511 2787/603/512 2784/604/513 608/605/514\nf 611/606/515 2788/607/515 2787/603/512 610/602/511\nf 612/608/516 2789/609/517 2788/610/515 611/611/515\nf 613/612/518 2790/613/519 2789/609/517 612/608/516\nf 609/614/520 2793/615/521 2794/616/522 615/617/523\nf 616/618/524 2796/619/525 2795/620/526 614/621/527\nf 617/622/528 2797/623/528 2796/619/525 616/618/524\nf 615/617/523 2794/616/522 2797/623/528 617/624/528\nf 620/625/529 2800/626/530 2798/627/531 2785/628/531\nf 621/629/515 2801/630/515 2800/626/530 620/625/529\nf 622/631/532 2802/632/533 2801/630/515 621/633/515\nf 2791/634/534 2803/635/534 2802/632/533 622/631/532\nf 2799/636/535 629/637/536 631/638/537 2804/639/535\nf 629/637/536 630/640/112 631/638/537\nf 2786/641/538 628/642/538 632/643/538 2792/644/538\nf 618/645/539 624/646/540 626/647/541 625/648/542\nf 625/648/542 626/647/541 627/649/112\nf 578/546/470 571/545/469 633/650/543 635/651/544\nf 635/651/544 633/650/543 572/538/462 577/541/465\nf 574/548/472 578/546/470 635/651/544 634/652/545\nf 634/652/545 635/651/544 577/541/465 573/543/467\nf 571/545/469 583/551/475 636/653/546 633/650/543\nf 633/650/543 636/653/546 584/562/484 572/538/462\nf 573/543/467 594/565/487 637/654/547 634/652/545\nf 634/652/545 637/654/547 593/561/483 574/548/472\nf 583/551/475 2764/568/490 2805/655/548 636/653/546\nf 636/653/546 2805/655/548 2769/573/494 584/562/484\nf 594/565/487 2771/576/497 2806/656/549 637/654/547\nf 637/654/547 2806/656/549 2768/572/493 593/561/483\nf 598/581/502 2774/580/501 2807/657/550 638/658/551\nf 638/658/551 2807/657/550 2779/591/508 599/590/507\nf 604/597/510 2781/596/509 2808/659/552 639/660/553\nf 639/660/553 2808/659/552 2778/589/506 603/588/505\nf 608/605/514 2784/604/513 2809/661/554 640/662/555\nf 640/662/555 2809/661/554 2793/615/521 609/614/520\nf 614/621/527 2795/620/526 2810/663/556 641/664/557\nf 641/664/557 2810/663/556 2790/613/519 613/612/518\nf 624/646/540 618/645/539 642/665/558 643/666/559\nf 643/666/559 642/665/558 619/667/560 623/668/560\nf 581/547/471 645/669/561 644/670/562 580/544/468\nf 582/549/473 646/671/563 645/669/561 581/547/471\nf 580/544/468 644/670/562 647/672/564 585/550/474\nf 585/550/474 647/672/564 648/673/565 586/552/476\nf 586/552/476 648/673/565 649/674/566 588/554/478\nf 588/556/478 649/675/566 650/676/567 590/557/480\nf 590/557/480 650/676/567 651/677/568 592/560/482\nf 592/560/482 651/677/568 646/671/563 582/549/473\nf 645/669/561 652/678/569 653/679/570 644/670/562\nf 646/671/563 654/680/571 652/678/569 645/669/561\nf 644/670/562 653/679/570 655/681/572 647/672/564\nf 647/672/564 655/681/572 656/682/573 648/673/565\nf 648/673/565 656/682/573 657/683/574 649/674/566\nf 649/675/566 657/684/574 658/685/575 650/676/567\nf 650/676/567 658/685/575 659/686/576 651/677/568\nf 651/677/568 659/686/576 654/680/571 646/671/563\nf 652/678/569 660/687/577 661/688/578 653/679/570\nf 654/680/571 662/689/579 660/687/577 652/678/569\nf 653/679/570 661/688/578 663/690/580 655/681/572\nf 655/681/572 663/690/580 664/691/581 656/682/573\nf 656/682/573 664/691/581 665/692/582 657/683/574\nf 657/684/574 665/693/582 666/694/583 658/685/575\nf 658/685/575 666/694/583 667/695/584 659/686/576\nf 659/686/576 667/695/584 662/689/579 654/680/571\nf 709/696/585 706/697/586 672/698/587 671/699/588\nf 709/696/585 671/699/588 673/700/589 708/701/590\nf 708/701/590 673/700/589 674/702/591 2811/703/592\nf 2811/704/592 674/705/591 675/706/593 2812/707/594\nf 2812/707/594 675/706/593 676/708/595 707/709/596\nf 707/709/596 676/708/595 677/710/597 705/711/598\nf 706/697/586 2818/712/599 678/713/600 672/698/587\nf 705/711/598 677/710/597 678/713/600 2818/712/599\nf 671/699/588 672/698/587 680/714/601 679/715/602\nf 671/699/588 679/715/602 681/716/603 673/700/589\nf 673/700/589 681/716/603 682/717/604 674/702/591\nf 674/705/591 682/718/604 683/719/605 675/706/593\nf 675/706/593 683/719/605 684/720/606 676/708/595\nf 676/708/595 684/720/606 685/721/607 677/710/597\nf 672/698/587 678/713/600 686/722/608 680/714/601\nf 677/710/597 685/721/607 686/722/608 678/713/600\nf 679/715/602 680/714/601 696/723/609 697/724/610\nf 697/724/610 696/723/609 688/725/611 687/726/612\nf 681/716/603 679/715/602 697/724/610 698/727/613\nf 698/727/613 697/724/610 687/726/612 689/728/614\nf 684/720/606 683/719/605 699/729/615 700/730/616\nf 700/730/616 699/729/615 690/731/617 691/732/618\nf 685/721/607 684/720/606 700/730/616 701/733/619\nf 701/733/619 700/730/616 691/732/618 692/734/620\nf 680/714/601 686/722/608 702/735/621 696/723/609\nf 696/723/609 702/735/621 693/736/622 688/725/611\nf 686/722/608 685/721/607 701/733/619 702/735/621\nf 702/735/621 701/733/619 692/734/620 693/736/622\nf 683/719/605 682/718/604 703/737/623 699/729/615\nf 699/729/615 703/737/623 694/738/624 690/731/617\nf 682/717/604 681/716/603 698/727/613 704/739/625\nf 704/739/625 698/727/613 689/728/614 695/740/626\nf 660/687/577 670/741/627 2813/742/628 661/688/578\nf 662/689/579 2817/743/629 670/741/627 660/687/577\nf 661/688/578 2813/742/628 2814/744/630 663/690/580\nf 663/690/580 2814/744/630 669/745/631 664/691/581\nf 664/691/581 669/745/631 668/746/632 665/692/582\nf 665/693/582 668/747/632 2815/748/633 666/694/583\nf 666/694/583 2815/748/633 2816/749/634 667/695/584\nf 667/695/584 2816/749/634 2817/743/629 662/689/579\nf 902/750/112 728/751/112 2869/752/112 2868/753/112\nf 730/754/76 906/755/76 2870/756/76 2871/757/76\nf 903/758/76 873/759/76 2873/760/76 2872/761/76\nf 906/755/76 905/762/76 2874/763/76 2870/756/76\nf 905/762/76 904/764/76 2875/765/76 2874/763/76\nf 904/764/76 903/758/76 2872/761/76 2875/765/76\nf 874/766/112 899/767/112 2876/768/112 2877/769/112\nf 901/770/112 902/750/112 2868/753/112 2878/771/112\nf 900/772/112 901/770/112 2878/771/112 2879/773/112\nf 899/767/112 900/772/112 2879/773/112 2876/768/112\nf 753/774/76 730/754/76 2871/757/76 2880/775/76\nf 715/776/76 750/777/76 2881/778/76 2882/779/76\nf 752/780/76 753/774/76 2880/775/76 2883/781/76\nf 751/782/76 752/780/76 2883/781/76 2884/783/76\nf 750/777/76 751/782/76 2884/783/76 2881/778/76\nf 746/784/112 716/785/112 2886/786/112 2885/787/112\nf 728/751/112 749/788/112 2887/789/112 2869/752/112\nf 749/788/112 748/790/112 2888/791/112 2887/789/112\nf 748/790/112 747/792/112 2889/793/112 2888/791/112\nf 747/792/112 746/784/112 2885/787/112 2889/793/112\nf 1038/794/635 1034/795/636 1033/796/637 1037/797/638\nf 1037/797/638 1033/796/637 1032/798/639 1036/799/640\nf 1036/799/640 1032/798/639 1031/800/641 1035/801/642\nf 1042/802/643 1034/795/636 1038/794/635 1041/803/644\nf 1040/804/645 1035/801/642 1031/800/641 1039/805/645\nf 1028/806/646 1027/807/647 1023/808/648 1024/809/649\nf 1027/807/647 1026/810/650 1022/811/651 1023/808/648\nf 1026/810/650 1025/812/652 1021/813/653 1022/811/651\nf 1030/814/654 1029/815/655 1028/806/646 1024/809/649\nf 1040/804/645 1039/805/645 1021/813/653 1025/812/652\nf 715/776/76 2882/779/76 2873/816/76 873/817/76\nf 716/785/112 874/818/112 2877/819/112 2886/786/112\nf 1029/820/655 1030/821/654 1042/802/643 1041/803/644\nusemtl WhiteCloth\nf 1208/822/656 1207/823/657 1085/824/658 1145/825/659\nf 1165/826/660 1164/827/661 1189/828/662 1188/829/663\nf 1234/830/664 1233/831/665 1210/832/666 1209/833/667\nf 1144/834/668 1059/835/669 1231/836/670 1232/837/671\nf 1096/838/672 1095/839/673 1211/840/674 1212/841/675\nf 1095/839/673 1136/842/676 1210/832/666 1211/840/674\nf 1084/843/677 1163/844/678 1186/845/679 1187/846/680\nf 1085/824/658 1084/843/677 1187/846/680 1188/829/663\nf 1145/825/659 1085/824/658 1188/829/663 1189/828/662\nf 1187/846/680 1186/845/679 1167/847/681 1166/848/682\nf 1192/849/683 1191/850/684 1146/851/685 1147/852/686\nf 1191/850/684 1190/853/687 1140/854/688 1146/851/685\nf 1144/834/668 1142/855/689 1190/853/687 1191/850/684\nf 1059/835/669 1144/834/668 1191/850/684 1192/849/683\nf 1190/853/687 1141/856/690 1086/857/691 1140/854/688\nf 1206/858/692 1205/859/693 1163/844/678 1084/843/677\nf 1207/823/657 1206/858/692 1084/843/677 1085/824/658\nf 1147/852/686 1146/851/685 1166/860/682 1167/861/681\nf 1146/851/685 1140/854/688 1165/862/660 1166/860/682\nf 1142/855/689 1087/863/694 1141/856/690 1190/853/687\nf 1095/839/673 1096/838/672 1205/859/693 1206/858/692\nf 1137/864/695 1136/842/676 1207/823/657 1208/822/656\nf 1136/842/676 1095/839/673 1206/858/692 1207/823/657\nf 1136/842/676 1137/864/695 1209/833/667 1210/832/666\nf 1142/855/689 1144/834/668 1232/837/671 1233/831/665\nf 1087/863/694 1142/855/689 1233/831/665 1234/830/664\nf 1140/854/688 1086/857/691 1164/865/661 1165/862/660\nf 1212/841/675 1211/840/674 1232/837/671 1231/836/670\nf 1211/840/674 1210/832/666 1233/831/665 1232/837/671\nf 1165/826/660 1188/829/663 1187/846/680 1166/848/682\nf 1424/866/696 1361/867/697 1301/868/698 1423/869/699\nf 1381/870/700 1404/871/701 1405/872/702 1380/873/703\nf 1450/874/704 1425/875/705 1426/876/706 1449/877/707\nf 1360/878/708 1448/879/709 1447/880/710 1275/881/711\nf 1312/882/712 1428/883/713 1427/884/714 1311/885/715\nf 1311/885/715 1427/884/714 1426/876/706 1352/886/716\nf 1300/887/717 1403/888/718 1402/889/719 1379/890/720\nf 1301/868/698 1404/871/701 1403/888/718 1300/887/717\nf 1361/867/697 1405/872/702 1404/871/701 1301/868/698\nf 1403/888/718 1382/891/721 1383/892/722 1402/889/719\nf 1408/893/723 1363/894/724 1362/895/725 1407/896/726\nf 1407/896/726 1362/895/725 1356/897/727 1406/898/728\nf 1360/878/708 1407/896/726 1406/898/728 1358/899/729\nf 1275/881/711 1408/893/723 1407/896/726 1360/878/708\nf 1406/898/728 1356/897/727 1302/900/730 1357/901/731\nf 1422/902/732 1300/887/717 1379/890/720 1421/903/733\nf 1423/869/699 1301/868/698 1300/887/717 1422/902/732\nf 1363/894/724 1383/904/722 1382/905/721 1362/895/725\nf 1362/895/725 1382/905/721 1381/906/700 1356/897/727\nf 1358/899/729 1406/898/728 1357/901/731 1303/907/734\nf 1311/885/715 1422/902/732 1421/903/733 1312/882/712\nf 1353/908/735 1424/866/696 1423/869/699 1352/886/716\nf 1352/886/716 1423/869/699 1422/902/732 1311/885/715\nf 1352/886/716 1426/876/706 1425/875/705 1353/908/735\nf 1358/899/729 1449/877/707 1448/879/709 1360/878/708\nf 1303/907/734 1450/874/704 1449/877/707 1358/899/729\nf 1356/897/727 1381/906/700 1380/909/703 1302/900/730\nf 1428/883/713 1447/880/710 1448/879/709 1427/884/714\nf 1427/884/714 1448/879/709 1449/877/707 1426/876/706\nf 1381/870/700 1382/891/721 1403/888/718 1404/871/701\nusemtl WhiteCloth_NONE\nf 2/910/736 1/911/737 4/912/738 5/913/739\nf 5/913/739 6/914/740 3/915/741 2/910/736\nf 7/916/742 8/917/743 5/913/739 4/912/738\nf 8/917/743 9/918/744 6/914/740 5/913/739\nf 10/919/745 11/920/746 8/917/743 7/916/742\nf 11/920/746 12/921/747 9/918/744 8/917/743\nf 15/922/748 13/923/749 11/920/746 10/919/745\nf 13/923/749 14/924/750 12/921/747 11/920/746\nusemtl Skin\nf 1093/925/751 1058/926/752 1088/927/753 1118/928/754\nf 1059/929/669 1089/930/755 1230/931/756 1231/932/670\nf 1230/931/756 1089/930/755 1242/933/757 1243/934/758\nf 1091/935/759 1060/936/760 1058/926/752 1093/925/751\nf 1091/937/759 1061/938/761 1103/939/762 1102/940/763\nf 1061/941/761 1091/935/759 1093/925/751 1193/942/764\nf 1090/943/765 1061/941/761 1193/942/764 1194/944/766\nf 1061/938/761 1090/945/765 1104/946/767 1103/939/762\nf 1104/946/767 1090/945/765 1092/947/768 1106/948/769\nf 1060/936/760 1091/935/759 1228/949/770 1229/950/771\nf 1090/943/765 1194/944/766 1195/951/772 1092/952/768\nf 1194/953/766 1203/954/773 1202/955/774 1195/956/772\nf 1194/953/766 1193/957/764 1204/958/775 1203/954/773\nf 1193/957/764 1093/959/751 1108/960/776 1204/958/775\nf 1094/961/777 1062/962/778 1226/963/779 1227/964/780\nf 1226/963/779 1062/962/778 1068/965/781 1225/966/782\nf 1062/967/778 1094/968/777 1098/969/783 1099/970/784\nf 1062/967/778 1099/970/784 1100/971/785 1068/972/781\nf 1243/973/758 1063/974/786 1253/975/787 1244/976/788\nf 1214/977/789 1063/974/786 1243/973/758 1229/978/771\nf 1063/974/786 1214/977/789 1107/979/790 1235/980/791\nf 1064/981/792 1253/975/787 1063/974/786 1213/982/793\nf 1066/983/794 1064/981/792 1213/982/793 1230/984/756\nf 1253/975/787 1064/981/792 1097/985/795 1252/986/796\nf 1064/981/792 1066/983/794 1073/987/797 1097/985/795\nf 1065/988/798 1213/982/793 1063/974/786 1235/980/791\nf 1065/988/798 1096/989/672 1212/990/675 1213/982/793\nf 1066/991/794 1244/992/788 1245/993/799 1073/994/797\nf 1244/976/788 1253/975/787 1252/986/796 1245/995/799\nf 1252/986/796 1251/996/800 1246/997/801 1245/995/799\nf 1251/996/800 1250/998/802 1247/999/803 1246/997/801\nf 1250/998/802 1249/1000/804 1248/1001/805 1247/999/803\nf 1098/969/783 1102/940/763 1215/1002/806 1216/1003/807\nf 1091/937/759 1102/940/763 1098/969/783 1094/968/777\nf 1102/940/763 1107/979/790 1214/977/789 1215/1002/806\nf 1068/972/781 1100/971/785 1101/1004/808 1067/1005/809\nf 1100/971/785 1218/1006/810 1219/1007/811 1101/1004/808\nf 1134/1008/812 1067/1005/809 1101/1004/808 1135/1009/813\nf 1067/1010/809 1134/1011/812 1223/1012/814 1224/1013/815\nf 1225/966/782 1068/965/781 1067/1010/809 1224/1013/815\nf 1237/1014/816 1162/1015/817 1184/1016/818 1238/1017/819\nf 1181/1018/820 1110/1019/821 1121/1020/822 1180/1021/823\nf 1110/1019/821 1117/1022/824 1120/1023/825 1121/1020/822\nf 1184/1016/818 1183/1024/826 1170/1025/827 1169/1026/828\nf 1183/1024/826 1182/1027/829 1171/1028/830 1170/1025/827\nf 1182/1027/829 1181/1018/820 1172/1029/831 1171/1028/830\nf 1172/1029/831 1181/1018/820 1180/1021/823 1173/1030/832\nf 1150/1031/833 1159/1032/834 1158/1033/835 1151/1034/836\nf 1160/1035/837 1159/1032/834 1150/1031/833 1149/1036/838\nf 1151/1034/836 1158/1033/835 1157/1037/839 1152/1038/840\nf 1159/1032/834 1114/1039/841 1116/1040/842 1158/1033/835\nf 1114/1039/841 1112/1041/843 1070/1042/844 1116/1040/842\nf 1112/1043/843 1150/1044/833 1151/1045/836 1070/1046/844\nf 1093/959/751 1113/1047/845 1115/1048/846 1108/960/776\nf 1113/1047/845 1112/1041/843 1114/1039/841 1115/1048/846\nf 1069/1049/847 1157/1037/839 1158/1033/835 1116/1040/842\nf 1069/1049/847 1128/1050/848 1156/1051/849 1157/1037/839\nf 1128/1050/848 1069/1049/847 1071/1052/850 1072/1053/851\nf 1069/1049/847 1116/1040/842 1070/1042/844 1071/1052/850\nf 1070/1046/844 1151/1045/836 1152/1054/840 1071/1055/850\nf 1160/1035/837 1149/1036/838 1118/1056/754 1161/1057/852\nf 1072/1058/851 1071/1055/850 1152/1054/840 1153/1059/853\nf 1129/1060/854 1072/1058/851 1153/1059/853 1154/1061/855\nf 1128/1050/848 1072/1053/851 1129/1062/854 1080/1063/856\nf 1110/1019/821 1111/1064/857 1119/1065/858 1117/1022/824\nf 1117/1066/824 1172/1029/831 1173/1030/832 1120/1067/825\nf 1123/1068/859 1075/1069/860 1122/1070/861 1125/1071/862\nf 1124/1072/863 1123/1068/859 1125/1071/862 1074/1073/864\nf 1073/987/797 1122/1070/861 1075/1069/860 1097/985/795\nf 1122/1074/861 1073/994/797 1245/993/799 1246/1075/801\nf 1074/1076/864 1125/1077/862 1247/1078/803 1248/1079/805\nf 1075/1069/860 1123/1068/859 1250/998/802 1251/996/800\nf 1097/985/795 1075/1069/860 1251/996/800 1252/986/796\nf 1126/1080/865 1076/1081/866 1177/1082/867 1178/1083/868\nf 1177/1082/867 1076/1081/866 1079/1084/869 1176/1085/870\nf 1076/1081/866 1126/1080/865 1078/1086/871 1079/1084/869\nf 1078/1087/871 1077/1088/872 1174/1089/873 1175/1090/874\nf 1077/1091/872 1078/1086/871 1126/1080/865 1127/1092/875\nf 1079/1093/869 1078/1087/871 1175/1090/874 1176/1085/870\nf 1128/1050/848 1080/1063/856 1155/1094/876 1156/1051/849\nf 1129/1062/854 1154/1095/855 1155/1094/876 1080/1063/856\nf 1130/1096/877 1131/1097/878 1132/1098/879 1081/1099/880\nf 1133/1100/881 1132/1098/879 1131/1097/878 1105/1101/882\nf 1198/1102/883 1199/1103/884 1130/1096/877 1081/1099/880\nf 1081/1104/880 1132/1105/879 1197/1106/885 1198/1107/883\nf 1198/1102/883 1197/1108/885 1200/1109/886 1199/1103/884\nf 1197/1108/885 1196/1110/887 1201/1111/888 1200/1109/886\nf 1195/956/772 1202/955/774 1201/1111/888 1196/1110/887\nf 1082/1112/889 1134/1008/812 1135/1009/813 1083/1113/890\nf 1134/1011/812 1082/1114/889 1222/1115/891 1223/1012/814\nf 1082/1112/889 1083/1113/890 1221/1116/892 1222/1117/891\nf 1083/1113/890 1135/1009/813 1220/1118/893 1221/1116/892\nf 1186/1119/679 1185/1120/894 1168/1121/895 1167/1122/681\nf 1143/1123/896 1192/1124/683 1147/1125/686 1148/1126/897\nf 1143/1123/896 1148/1126/897 1240/1127/898 1241/1128/899\nf 1058/926/752 1241/1128/899 1240/1127/898 1088/927/753\nf 1108/960/776 1115/1048/846 1160/1035/837 1161/1057/852\nf 1115/1048/846 1114/1039/841 1159/1032/834 1160/1035/837\nf 1109/1129/900 1108/960/776 1161/1057/852 1162/1015/817\nf 1205/1130/693 1139/1131/901 1138/1132/902 1163/1133/678\nf 1138/1132/902 1139/1131/901 1236/1134/903 1237/1014/816\nf 1148/1126/897 1147/1125/686 1167/1122/681 1168/1121/895\nf 1148/1126/897 1168/1121/895 1239/1135/904 1240/1127/898\nf 1088/927/753 1240/1127/898 1239/1135/904 1169/1026/828\nf 1117/1066/824 1119/1136/858 1171/1028/830 1172/1029/831\nf 1119/1136/858 1118/928/754 1170/1025/827 1171/1028/830\nf 1127/1092/875 1126/1080/865 1178/1083/868 1179/1137/905\nf 1127/1092/875 1179/1137/905 1180/1021/823 1121/1020/822\nf 1111/1064/857 1110/1019/821 1181/1018/820 1182/1027/829\nf 1161/1057/852 1111/1064/857 1182/1027/829 1183/1024/826\nf 1162/1015/817 1161/1057/852 1183/1024/826 1184/1016/818\nf 1163/1133/678 1138/1132/902 1185/1120/894 1186/1119/679\nf 1089/930/755 1059/929/669 1192/1124/683 1143/1123/896\nf 1089/930/755 1143/1123/896 1241/1128/899 1242/933/757\nf 1060/936/760 1242/933/757 1241/1128/899 1058/926/752\nf 1195/951/772 1196/1138/887 1133/1139/881 1092/952/768\nf 1132/1105/879 1133/1139/881 1196/1138/887 1197/1106/885\nf 1131/1097/878 1130/1096/877 1199/1103/884 1200/1109/886\nf 1105/1101/882 1131/1097/878 1200/1109/886 1201/1111/888\nf 1105/1101/882 1201/1111/888 1202/955/774 1106/948/769\nf 1104/946/767 1106/948/769 1202/955/774 1203/954/773\nf 1103/939/762 1104/946/767 1203/954/773 1204/958/775\nf 1102/940/763 1103/939/762 1204/958/775 1108/960/776\nf 1235/980/791 1107/979/790 1109/1129/900 1236/1134/903\nf 1096/989/672 1065/988/798 1139/1131/901 1205/1130/693\nf 1139/1131/901 1065/988/798 1235/980/791 1236/1134/903\nf 1218/1006/810 1100/971/785 1099/970/784 1217/1140/906\nf 1091/935/759 1094/961/777 1227/964/780 1228/949/770\nf 1185/1120/894 1238/1017/819 1239/1135/904 1168/1121/895\nf 1185/1120/894 1138/1132/902 1237/1014/816 1238/1017/819\nf 1125/1077/862 1122/1074/861 1246/1075/801 1247/1078/803\nf 1249/1000/804 1124/1072/863 1074/1073/864 1248/1001/805\nf 1123/1068/859 1124/1072/863 1249/1000/804 1250/998/802\nf 1242/933/757 1060/936/760 1229/950/771 1243/934/758\nf 1118/928/754 1088/927/753 1169/1026/828 1170/1025/827\nf 1113/1141/845 1093/925/751 1118/928/754 1149/1142/838\nf 1228/1143/770 1227/1144/780 1216/1003/807 1215/1002/806\nf 1227/1144/780 1226/1145/779 1217/1140/906 1216/1003/807\nf 1229/978/771 1228/1143/770 1215/1002/806 1214/977/789\nf 1213/982/793 1212/990/675 1231/1146/670 1230/984/756\nf 1066/991/794 1230/931/756 1243/934/758 1244/992/788\nf 1099/970/784 1098/969/783 1216/1003/807 1217/1140/906\nf 1135/1009/813 1101/1004/808 1219/1007/811 1220/1118/893\nf 1218/1006/810 1217/1140/906 1226/1145/779 1225/1147/782\nf 1218/1006/810 1225/1147/782 1224/1148/815 1219/1007/811\nf 1107/979/790 1102/940/763 1108/960/776 1109/1129/900\nf 1133/1100/881 1105/1101/882 1106/948/769 1092/947/768\nf 1236/1134/903 1109/1129/900 1162/1015/817 1237/1014/816\nf 1111/1064/857 1161/1057/852 1118/1056/754 1119/1065/858\nf 1238/1017/819 1184/1016/818 1169/1026/828 1239/1135/904\nf 1112/1043/843 1113/1141/845 1149/1142/838 1150/1044/833\nf 1153/1149/853 1152/1038/840 1157/1037/839 1156/1051/849\nf 1154/1095/855 1153/1149/853 1156/1051/849 1155/1094/876\nf 1077/1088/872 1120/1067/825 1173/1030/832 1174/1089/873\nf 1127/1092/875 1121/1020/822 1120/1023/825 1077/1091/872\nf 1179/1137/905 1174/1089/873 1173/1030/832 1180/1021/823\nf 1179/1137/905 1178/1083/868 1175/1090/874 1174/1089/873\nf 1178/1083/868 1177/1082/867 1176/1085/870 1175/1090/874\nf 1219/1007/811 1224/1148/815 1223/1150/814 1220/1118/893\nf 1221/1116/892 1220/1118/893 1223/1150/814 1222/1117/891\nf 1309/1151/907 1334/1152/908 1304/1153/909 1274/1154/910\nf 1275/1155/711 1447/1156/710 1446/1157/911 1305/1158/912\nf 1446/1157/911 1459/1159/913 1458/1160/914 1305/1158/912\nf 1307/1161/915 1309/1151/907 1274/1154/910 1276/1162/916\nf 1307/1163/915 1318/1164/917 1319/1165/918 1277/1166/919\nf 1277/1167/919 1409/1168/920 1309/1151/907 1307/1161/915\nf 1306/1169/921 1410/1170/922 1409/1168/920 1277/1167/919\nf 1277/1166/919 1319/1165/918 1320/1171/923 1306/1172/921\nf 1320/1171/923 1322/1173/924 1308/1174/925 1306/1172/921\nf 1276/1162/916 1445/1175/926 1444/1176/927 1307/1161/915\nf 1306/1169/921 1308/1177/925 1411/1178/928 1410/1170/922\nf 1410/1179/922 1411/1180/928 1418/1181/929 1419/1182/930\nf 1410/1179/922 1419/1182/930 1420/1183/931 1409/1184/920\nf 1409/1184/920 1420/1183/931 1324/1185/932 1309/1186/907\nf 1310/1187/933 1443/1188/934 1442/1189/935 1278/1190/936\nf 1442/1189/935 1441/1191/937 1284/1192/938 1278/1190/936\nf 1278/1193/936 1315/1194/939 1314/1195/940 1310/1196/933\nf 1278/1193/936 1284/1197/938 1316/1198/941 1315/1194/939\nf 1459/1199/913 1460/1200/942 1469/1201/943 1279/1202/944\nf 1430/1203/945 1445/1204/926 1459/1199/913 1279/1202/944\nf 1279/1202/944 1451/1205/946 1323/1206/947 1430/1203/945\nf 1280/1207/948 1429/1208/949 1279/1202/944 1469/1201/943\nf 1282/1209/950 1446/1210/911 1429/1208/949 1280/1207/948\nf 1469/1201/943 1468/1211/951 1313/1212/952 1280/1207/948\nf 1280/1207/948 1313/1212/952 1289/1213/953 1282/1209/950\nf 1281/1214/954 1451/1205/946 1279/1202/944 1429/1208/949\nf 1281/1214/954 1429/1208/949 1428/1215/713 1312/1216/712\nf 1282/1217/950 1289/1218/953 1461/1219/955 1460/1220/942\nf 1460/1200/942 1461/1221/955 1468/1211/951 1469/1201/943\nf 1468/1211/951 1461/1221/955 1462/1222/956 1467/1223/957\nf 1467/1223/957 1462/1222/956 1463/1224/958 1466/1225/959\nf 1466/1225/959 1463/1224/958 1464/1226/960 1465/1227/961\nf 1314/1195/940 1432/1228/962 1431/1229/963 1318/1164/917\nf 1307/1163/915 1310/1196/933 1314/1195/940 1318/1164/917\nf 1318/1164/917 1431/1229/963 1430/1203/945 1323/1206/947\nf 1284/1197/938 1283/1230/964 1317/1231/965 1316/1198/941\nf 1316/1198/941 1317/1231/965 1435/1232/966 1434/1233/967\nf 1350/1234/968 1351/1235/969 1317/1231/965 1283/1230/964\nf 1283/1236/964 1440/1237/970 1439/1238/971 1350/1239/968\nf 1441/1191/937 1440/1237/970 1283/1236/964 1284/1192/938\nf 1453/1240/972 1454/1241/973 1400/1242/974 1378/1243/975\nf 1397/1244/976 1396/1245/977 1337/1246/978 1326/1247/979\nf 1326/1247/979 1337/1246/978 1336/1248/980 1333/1249/981\nf 1400/1242/974 1385/1250/982 1386/1251/983 1399/1252/984\nf 1399/1252/984 1386/1251/983 1387/1253/985 1398/1254/986\nf 1398/1254/986 1387/1253/985 1388/1255/987 1397/1244/976\nf 1388/1255/987 1389/1256/988 1396/1245/977 1397/1244/976\nf 1366/1257/989 1367/1258/990 1374/1259/991 1375/1260/992\nf 1376/1261/993 1365/1262/994 1366/1257/989 1375/1260/992\nf 1367/1258/990 1368/1263/995 1373/1264/996 1374/1259/991\nf 1375/1260/992 1374/1259/991 1332/1265/997 1330/1266/998\nf 1330/1266/998 1332/1265/997 1286/1267/999 1328/1268/1000\nf 1328/1269/1000 1286/1270/999 1367/1271/990 1366/1272/989\nf 1309/1186/907 1324/1185/932 1331/1273/1001 1329/1274/1002\nf 1329/1274/1002 1331/1273/1001 1330/1266/998 1328/1268/1000\nf 1285/1275/1003 1332/1265/997 1374/1259/991 1373/1264/996\nf 1285/1275/1003 1373/1264/996 1372/1276/1004 1344/1277/1005\nf 1344/1277/1005 1288/1278/1006 1287/1279/1007 1285/1275/1003\nf 1285/1275/1003 1287/1279/1007 1286/1267/999 1332/1265/997\nf 1286/1270/999 1287/1280/1007 1368/1281/995 1367/1271/990\nf 1376/1261/993 1377/1282/1008 1334/1283/908 1365/1262/994\nf 1288/1284/1006 1369/1285/1009 1368/1281/995 1287/1280/1007\nf 1345/1286/1010 1370/1287/1011 1369/1285/1009 1288/1284/1006\nf 1344/1277/1005 1296/1288/1012 1345/1289/1010 1288/1278/1006\nf 1326/1247/979 1333/1249/981 1335/1290/1013 1327/1291/1014\nf 1333/1292/981 1336/1293/980 1389/1256/988 1388/1255/987\nf 1339/1294/1015 1341/1295/1016 1338/1296/1017 1291/1297/1018\nf 1340/1298/1019 1290/1299/1020 1341/1295/1016 1339/1294/1015\nf 1289/1213/953 1313/1212/952 1291/1297/1018 1338/1296/1017\nf 1338/1300/1017 1462/1301/956 1461/1219/955 1289/1218/953\nf 1290/1302/1020 1464/1303/960 1463/1304/958 1341/1305/1016\nf 1291/1297/1018 1467/1223/957 1466/1225/959 1339/1294/1015\nf 1313/1212/952 1468/1211/951 1467/1223/957 1291/1297/1018\nf 1342/1306/1021 1394/1307/1022 1393/1308/1023 1292/1309/1024\nf 1393/1308/1023 1392/1310/1025 1295/1311/1026 1292/1309/1024\nf 1292/1309/1024 1295/1311/1026 1294/1312/1027 1342/1306/1021\nf 1294/1313/1027 1391/1314/1028 1390/1315/1029 1293/1316/1030\nf 1293/1317/1030 1343/1318/1031 1342/1306/1021 1294/1312/1027\nf 1295/1319/1026 1392/1310/1025 1391/1314/1028 1294/1313/1027\nf 1344/1277/1005 1372/1276/1004 1371/1320/1032 1296/1288/1012\nf 1345/1289/1010 1296/1288/1012 1371/1320/1032 1370/1321/1011\nf 1346/1322/1033 1297/1323/1034 1348/1324/1035 1347/1325/1036\nf 1349/1326/1037 1321/1327/1038 1347/1325/1036 1348/1324/1035\nf 1414/1328/1039 1297/1323/1034 1346/1322/1033 1415/1329/1040\nf 1297/1330/1034 1414/1331/1039 1413/1332/1041 1348/1333/1035\nf 1414/1328/1039 1415/1329/1040 1416/1334/1042 1413/1335/1041\nf 1413/1335/1041 1416/1334/1042 1417/1336/1043 1412/1337/1044\nf 1411/1180/928 1412/1337/1044 1417/1336/1043 1418/1181/929\nf 1298/1338/1045 1299/1339/1046 1351/1235/969 1350/1234/968\nf 1350/1239/968 1439/1238/971 1438/1340/1047 1298/1341/1045\nf 1298/1338/1045 1438/1342/1047 1437/1343/1048 1299/1339/1046\nf 1299/1339/1046 1437/1343/1048 1436/1344/1049 1351/1235/969\nf 1402/1345/719 1383/1346/722 1384/1347/1050 1401/1348/1051\nf 1359/1349/1052 1364/1350/1053 1363/1351/724 1408/1352/723\nf 1359/1349/1052 1457/1353/1054 1456/1354/1055 1364/1350/1053\nf 1274/1154/910 1304/1153/909 1456/1354/1055 1457/1353/1054\nf 1324/1185/932 1377/1282/1008 1376/1261/993 1331/1273/1001\nf 1331/1273/1001 1376/1261/993 1375/1260/992 1330/1266/998\nf 1325/1355/1056 1378/1243/975 1377/1282/1008 1324/1185/932\nf 1421/1356/733 1379/1357/720 1354/1358/1057 1355/1359/1058\nf 1354/1358/1057 1453/1240/972 1452/1360/1059 1355/1359/1058\nf 1364/1350/1053 1384/1347/1050 1383/1346/722 1363/1351/724\nf 1364/1350/1053 1456/1354/1055 1455/1361/1060 1384/1347/1050\nf 1304/1153/909 1385/1250/982 1455/1361/1060 1456/1354/1055\nf 1333/1292/981 1388/1255/987 1387/1253/985 1335/1362/1013\nf 1335/1362/1013 1387/1253/985 1386/1251/983 1334/1152/908\nf 1343/1318/1031 1395/1363/1061 1394/1307/1022 1342/1306/1021\nf 1343/1318/1031 1337/1246/978 1396/1245/977 1395/1363/1061\nf 1327/1291/1014 1398/1254/986 1397/1244/976 1326/1247/979\nf 1377/1282/1008 1399/1252/984 1398/1254/986 1327/1291/1014\nf 1378/1243/975 1400/1242/974 1399/1252/984 1377/1282/1008\nf 1379/1357/720 1402/1345/719 1401/1348/1051 1354/1358/1057\nf 1305/1158/912 1359/1349/1052 1408/1352/723 1275/1155/711\nf 1305/1158/912 1458/1160/914 1457/1353/1054 1359/1349/1052\nf 1276/1162/916 1274/1154/910 1457/1353/1054 1458/1160/914\nf 1411/1178/928 1308/1177/925 1349/1364/1037 1412/1365/1044\nf 1348/1333/1035 1413/1332/1041 1412/1365/1044 1349/1364/1037\nf 1347/1325/1036 1416/1334/1042 1415/1329/1040 1346/1322/1033\nf 1321/1327/1038 1417/1336/1043 1416/1334/1042 1347/1325/1036\nf 1321/1327/1038 1322/1173/924 1418/1181/929 1417/1336/1043\nf 1320/1171/923 1419/1182/930 1418/1181/929 1322/1173/924\nf 1319/1165/918 1420/1183/931 1419/1182/930 1320/1171/923\nf 1318/1164/917 1324/1185/932 1420/1183/931 1319/1165/918\nf 1451/1205/946 1452/1360/1059 1325/1355/1056 1323/1206/947\nf 1312/1216/712 1421/1356/733 1355/1359/1058 1281/1214/954\nf 1355/1359/1058 1452/1360/1059 1451/1205/946 1281/1214/954\nf 1434/1233/967 1433/1366/1062 1315/1194/939 1316/1198/941\nf 1307/1161/915 1444/1176/927 1443/1188/934 1310/1187/933\nf 1401/1348/1051 1384/1347/1050 1455/1361/1060 1454/1241/973\nf 1401/1348/1051 1454/1241/973 1453/1240/972 1354/1358/1057\nf 1341/1305/1016 1463/1304/958 1462/1301/956 1338/1300/1017\nf 1465/1227/961 1464/1226/960 1290/1299/1020 1340/1298/1019\nf 1339/1294/1015 1466/1225/959 1465/1227/961 1340/1298/1019\nf 1458/1160/914 1459/1159/913 1445/1175/926 1276/1162/916\nf 1334/1152/908 1386/1251/983 1385/1250/982 1304/1153/909\nf 1329/1367/1002 1365/1368/994 1334/1152/908 1309/1151/907\nf 1444/1369/927 1431/1229/963 1432/1228/962 1443/1370/934\nf 1443/1370/934 1432/1228/962 1433/1366/1062 1442/1371/935\nf 1445/1204/926 1430/1203/945 1431/1229/963 1444/1369/927\nf 1429/1208/949 1446/1210/911 1447/1372/710 1428/1215/713\nf 1282/1217/950 1460/1220/942 1459/1159/913 1446/1157/911\nf 1315/1194/939 1433/1366/1062 1432/1228/962 1314/1195/940\nf 1351/1235/969 1436/1344/1049 1435/1232/966 1317/1231/965\nf 1434/1233/967 1441/1373/937 1442/1371/935 1433/1366/1062\nf 1434/1233/967 1435/1232/966 1440/1374/970 1441/1373/937\nf 1323/1206/947 1325/1355/1056 1324/1185/932 1318/1164/917\nf 1349/1326/1037 1308/1174/925 1322/1173/924 1321/1327/1038\nf 1452/1360/1059 1453/1240/972 1378/1243/975 1325/1355/1056\nf 1327/1291/1014 1335/1290/1013 1334/1283/908 1377/1282/1008\nf 1454/1241/973 1455/1361/1060 1385/1250/982 1400/1242/974\nf 1328/1269/1000 1366/1272/989 1365/1368/994 1329/1367/1002\nf 1369/1375/1009 1372/1276/1004 1373/1264/996 1368/1263/995\nf 1370/1321/1011 1371/1320/1032 1372/1276/1004 1369/1375/1009\nf 1293/1316/1030 1390/1315/1029 1389/1256/988 1336/1293/980\nf 1343/1318/1031 1293/1317/1030 1336/1248/980 1337/1246/978\nf 1395/1363/1061 1396/1245/977 1389/1256/988 1390/1315/1029\nf 1395/1363/1061 1390/1315/1029 1391/1314/1028 1394/1307/1022\nf 1394/1307/1022 1391/1314/1028 1392/1310/1025 1393/1308/1023\nf 1435/1232/966 1436/1344/1049 1439/1376/971 1440/1374/970\nf 1437/1343/1048 1438/1342/1047 1439/1376/971 1436/1344/1049\nf 2044/1377/1063 2045/1378/1064 1485/1379/1065 1475/1380/1066\nf 1477/1381/1067 1487/1382/1068 1486/1383/1069 1476/1384/1070\nf 1478/1385/1071 1488/1386/1072 1487/1382/1068 1477/1381/1067\nf 1479/1387/1073 1489/1388/1074 1488/1386/1072 1478/1385/1071\nf 1480/1389/1075 1490/1390/1076 1489/1388/1074 1479/1387/1073\nf 1537/1391/1077 1538/1392/1078 1490/1390/1076 1480/1389/1075\nf 1482/1393/1079 1492/1394/1080 1491/1395/1081 1481/1396/1082\nf 1483/1397/1083 1493/1398/1084 1492/1394/1080 1482/1393/1079\nf 1484/1399/1085 1494/1400/1086 1493/1398/1084 1483/1397/1083\nf 1475/1380/1066 1485/1379/1065 1494/1400/1086 1484/1399/1085\nf 2045/1378/1064 2046/1401/1087 1495/1402/1088 1485/1379/1065\nf 2046/1401/1087 2047/1403/1089 1497/1404/1090 1495/1402/1088\nf 1495/1402/1088 1503/1405/1091 1502/1406/1092 1485/1379/1065\nf 1497/1404/1090 1504/1407/1093 1503/1405/1091 1495/1402/1088\nf 1503/1405/1091 1500/1408/1094 1499/1409/1095 1502/1406/1092\nf 1504/1407/1093 1501/1410/1096 1500/1408/1094 1503/1405/1091\nf 2073/1411/1097 1509/1412/1098 1508/1413/1099 2072/1414/1100\nf 1505/1415/1101 1494/1400/1086 1485/1379/1065 1502/1406/1092\nf 1506/1416/1102 1493/1398/1084 1494/1400/1086 1505/1415/1101\nf 1499/1409/1095 1512/1417/1103 1505/1415/1101 1502/1406/1092\nf 1512/1417/1103 1511/1418/1104 1506/1416/1102 1505/1415/1101\nf 1511/1418/1104 1510/1419/1105 1507/1420/1106 1506/1416/1102\nf 1487/1382/1068 1514/1421/1107 1513/1422/1108 1486/1383/1069\nf 1488/1386/1072 1515/1423/1109 1514/1421/1107 1487/1382/1068\nf 1489/1388/1074 1516/1424/1110 1515/1423/1109 1488/1386/1072\nf 1490/1390/1076 1517/1425/1111 1516/1424/1110 1489/1388/1074\nf 1486/1383/1069 1513/1422/1108 1518/1426/1112 1496/1427/1113\nf 1496/1427/1113 1518/1426/1112 1519/1428/1114 1498/1429/1115\nf 1528/1430/1116 1527/1431/1117 1522/1432/1118 1521/1433/1119\nf 1526/1434/1120 1525/1435/1121 1524/1436/1122 1523/1437/1123\nf 1527/1431/1117 1526/1434/1120 1523/1437/1123 1522/1432/1118\nf 1941/1438/1124 1561/1439/1125 1562/1440/1126 1940/1441/1127\nf 1520/1442/1128 1508/1413/1099 1509/1412/1098 1529/1443/1129\nf 1523/1437/1123 1611/1444/1130 1582/1445/1131 1522/1432/1118\nf 1582/1445/1131 1583/1446/1132 1535/1447/1133 1522/1432/1118\nf 1535/1447/1133 1534/1448/1134 1521/1433/1119 1522/1432/1118\nf 1531/1449/1135 1533/1450/1136 1787/1451/1137 1788/1452/1138\nf 1789/1453/1139 1584/1454/1140 1531/1449/1135 1788/1452/1138\nf 1481/1396/1082 1491/1395/1081 2032/1455/1141 2033/1456/1142\nf 1476/1384/1070 1486/1383/1069 1540/1457/1143 1539/1458/1144\nf 1486/1383/1069 1496/1427/1113 1541/1459/1145 1540/1457/1143\nf 1496/1427/1113 1498/1429/1115 1542/1460/1146 1541/1459/1145\nf 1585/1461/1147 1586/1462/1148 1545/1463/1149 1546/1464/1150\nf 1944/1465/1151 1559/1466/1152 1589/1467/1153 1943/1468/1154\nf 1550/1469/1155 1527/1431/1117 1528/1430/1116 1547/1470/1156\nf 1525/1435/1121 1526/1434/1120 1549/1471/1157 1548/1472/1158\nf 1545/1463/1149 1586/1462/1148 1587/1473/1159 1544/1474/1160\nf 1549/1471/1157 1526/1434/1120 1527/1431/1117 1550/1469/1155\nf 1543/1475/1161 1590/1476/1162 1591/1477/1163 1566/1478/1164\nf 1557/1479/1165 1593/1480/1166 1594/1481/1167 1556/1482/1168\nf 1553/1483/1169 1592/1484/1170 1593/1480/1166 1557/1479/1165\nf 1942/1485/1171 1560/1486/1172 1561/1439/1125 1941/1438/1124\nf 1529/1443/1129 1509/1412/1098 1551/1487/1173 1558/1488/1174\nf 1544/1474/1160 1587/1473/1159 1588/1489/1175 1565/1490/1176\nf 1528/1430/1116 1561/1439/1125 1560/1486/1172 1547/1470/1156\nf 1521/1433/1119 1562/1440/1126 1561/1439/1125 1528/1430/1116\nf 2074/1491/1177 2075/1492/1178 1563/1493/1179 1578/1494/1180\nf 1555/1495/1181 1554/1496/1182 1563/1493/1179 1564/1497/1183\nf 1559/1466/1152 1565/1490/1176 1588/1489/1175 1589/1467/1153\nf 1566/1478/1164 1591/1477/1163 1592/1484/1170 1553/1483/1169\nf 1568/1498/1184 1500/1408/1094 1501/1410/1096 1567/1499/1185\nf 1511/1418/1104 1512/1417/1103 1570/1500/1186 1571/1501/1187\nf 1570/1500/1186 1512/1417/1103 1499/1409/1095 1569/1502/1188\nf 1569/1502/1188 1499/1409/1095 1500/1408/1094 1568/1498/1184\nf 1511/1418/1104 1571/1501/1187 1572/1503/1189 1573/1504/1190\nf 1573/1504/1190 1572/1503/1189 1574/1505/1191 1575/1506/1192\nf 1575/1506/1192 1574/1505/1191 1576/1507/1193 1577/1508/1194\nf 2075/1492/1178 2076/1509/1195 1564/1497/1183 1563/1493/1179\nf 1554/1496/1182 1552/1510/1196 1578/1494/1180 1563/1493/1179\nf 1552/1510/1196 1551/1487/1173 1509/1412/1098 1578/1494/1180\nf 2074/1491/1177 1578/1494/1180 1509/1412/1098 2073/1411/1097\nf 1573/1504/1190 1579/1511/1197 1510/1419/1105 1511/1418/1104\nf 1573/1504/1190 1575/1506/1192 1580/1512/1198 1579/1511/1197\nf 1575/1506/1192 1577/1508/1194 1581/1513/1199 1580/1512/1198\nf 1612/1514/1200 1530/1515/1201 1582/1445/1131 1611/1444/1130\nf 1530/1515/1201 1536/1516/1202 1583/1446/1132 1582/1445/1131\nf 1790/1517/1203 1532/1518/1204 1584/1454/1140 1789/1453/1139\nf 1548/1472/1158 1549/1471/1157 1586/1462/1148 1585/1461/1147\nf 1587/1473/1159 1586/1462/1148 1549/1471/1157 1550/1469/1155\nf 1588/1489/1175 1587/1473/1159 1550/1469/1155 1547/1470/1156\nf 1589/1467/1153 1588/1489/1175 1547/1470/1156 1560/1486/1172\nf 1943/1468/1154 1589/1467/1153 1560/1486/1172 1942/1485/1171\nf 1591/1477/1163 1590/1476/1162 1558/1488/1174 1551/1487/1173\nf 1592/1484/1170 1591/1477/1163 1551/1487/1173 1552/1510/1196\nf 1593/1480/1166 1592/1484/1170 1552/1510/1196 1554/1496/1182\nf 1594/1481/1167 1593/1480/1166 1554/1496/1182 1555/1495/1181\nf 1967/1519/1205 1599/1520/1206 1776/1521/1207 1777/1522/1208\nf 1787/1451/1137 1533/1450/1136 1595/1523/1209 1786/1524/1210\nf 1786/1524/1210 1595/1523/1209 1596/1525/1211 1785/1526/1212\nf 1596/1525/1211 1597/1527/1213 1784/1528/1214 1785/1526/1212\nf 1562/1440/1126 1521/1433/1119 1534/1448/1134 1600/1529/1215\nf 1507/1420/1106 1603/1530/1216 1493/1398/1084 1506/1416/1102\nf 1940/1441/1127 1562/1440/1126 1600/1529/1215 1939/1531/1217\nf 1520/1442/1128 1601/1532/1218 1602/1533/1219 1508/1413/1099\nf 1508/1413/1099 1602/1533/1219 2071/1534/1220 2072/1414/1100\nf 1538/1392/1078 1606/1535/1221 1517/1425/1111 1490/1390/1076\nf 1493/1398/1084 1603/1530/1216 1604/1536/1222 1492/1394/1080\nf 1492/1394/1080 1604/1536/1222 1605/1537/1223 1491/1395/1081\nf 1491/1395/1081 1605/1537/1223 2031/1538/1224 2032/1455/1141\nf 2070/1539/1225 2071/1534/1220 1602/1533/1219 1608/1540/1226\nf 2069/1541/1227 2070/1539/1225 1608/1540/1226 1610/1542/1228\nf 1608/1540/1226 1602/1533/1219 1601/1532/1218 1607/1543/1229\nf 1610/1542/1228 1608/1540/1226 1607/1543/1229 1609/1544/1230\nf 1524/1436/1122 1612/1514/1200 1611/1444/1130 1523/1437/1123\nf 1614/1545/1231 1613/1546/1232 1615/1547/1233 1616/1548/1234\nf 1616/1548/1234 1615/1547/1233 1568/1498/1184 1567/1499/1185\nf 1613/1546/1232 1621/1549/1235 1617/1550/1236 1615/1547/1233\nf 1615/1547/1233 1617/1550/1236 1569/1502/1188 1568/1498/1184\nf 1617/1550/1236 1618/1551/1237 1570/1500/1186 1569/1502/1188\nf 1619/1552/1238 1620/1553/1239 1572/1503/1189 1571/1501/1187\nf 1618/1551/1237 1619/1552/1238 1571/1501/1187 1570/1500/1186\nf 1624/1554/1240 1631/1555/1241 1629/1556/1242 1630/1557/1243\nf 1576/1507/1193 1622/1558/1244 1633/1559/1245 1634/1560/1246\nf 1623/1561/1247 1574/1505/1191 1572/1503/1189 1620/1553/1239\nf 1576/1507/1193 1574/1505/1191 1623/1561/1247 1622/1558/1244\nf 1633/1559/1245 1622/1558/1244 1625/1562/1248 1632/1563/1249\nf 1623/1561/1247 1620/1553/1239 1627/1564/1250 1626/1565/1251\nf 1620/1553/1239 1619/1552/1238 1628/1566/1252 1627/1564/1250\nf 1619/1552/1238 1618/1551/1237 1629/1556/1242 1628/1566/1252\nf 1618/1551/1237 1617/1550/1236 1630/1557/1243 1629/1556/1242\nf 1617/1550/1236 1621/1549/1235 1624/1554/1240 1630/1557/1243\nf 1629/1556/1242 1631/1555/1241 1627/1564/1250 1628/1566/1252\nf 1624/1554/1240 1632/1563/1249 1625/1562/1248 1631/1555/1241\nf 1627/1564/1250 1631/1555/1241 1625/1562/1248 1626/1565/1251\nf 1621/1549/1235 1633/1559/1245 1632/1563/1249 1624/1554/1240\nf 1634/1560/1246 1633/1559/1245 1621/1549/1235 1613/1546/1232\nf 1635/1567/1253 1634/1560/1246 1613/1546/1232 1614/1545/1231\nf 2044/1377/1063 1475/1380/1066 1650/1568/1254 2043/1569/1255\nf 1477/1381/1067 1476/1384/1070 1652/1570/1256 1653/1571/1257\nf 1478/1385/1071 1477/1381/1067 1653/1571/1257 1654/1572/1258\nf 1479/1387/1073 1478/1385/1071 1654/1572/1258 1655/1573/1259\nf 1480/1389/1075 1479/1387/1073 1655/1573/1259 1656/1574/1260\nf 1537/1391/1077 1480/1389/1075 1656/1574/1260 1657/1575/1261\nf 1482/1393/1079 1481/1396/1082 1658/1576/1262 1659/1577/1263\nf 1483/1397/1083 1482/1393/1079 1659/1577/1263 1648/1578/1264\nf 1484/1399/1085 1483/1397/1083 1648/1578/1264 1649/1579/1265\nf 1475/1380/1066 1484/1399/1085 1649/1579/1265 1650/1568/1254\nf 1481/1396/1082 2033/1456/1142 2034/1580/1266 1658/1576/1262\nf 1476/1384/1070 1539/1458/1144 1651/1581/1267 1652/1570/1256\nf 1649/1579/1265 1648/1578/1264 1646/1582/1268 1647/1583/1269\nf 1650/1568/1254 1649/1579/1265 1647/1583/1269 1636/1584/1270\nf 2043/1569/1255 1650/1568/1254 1636/1584/1270 2042/1585/1271\nf 1652/1570/1256 1651/1581/1267 1637/1586/1272 1638/1587/1273\nf 1653/1571/1257 1652/1570/1256 1638/1587/1273 1639/1588/1274\nf 1654/1572/1258 1653/1571/1257 1639/1588/1274 1640/1589/1275\nf 1655/1573/1259 1654/1572/1258 1640/1589/1275 1641/1590/1276\nf 1656/1574/1260 1655/1573/1259 1641/1590/1276 1642/1591/1277\nf 1657/1575/1261 1656/1574/1260 1642/1591/1277 1643/1592/1278\nf 1658/1576/1262 2034/1580/1266 2035/1593/1279 1644/1594/1280\nf 1659/1577/1263 1658/1576/1262 1644/1594/1280 1645/1595/1281\nf 1648/1578/1264 1659/1577/1263 1645/1595/1281 1646/1582/1268\nf 1639/1588/1274 1638/1587/1273 1661/1596/1282 1662/1597/1283\nf 1640/1589/1275 1639/1588/1274 1662/1597/1283 1663/1598/1284\nf 1641/1590/1276 1640/1589/1275 1663/1598/1284 1664/1599/1285\nf 1642/1591/1277 1641/1590/1276 1664/1599/1285 1665/1600/1286\nf 1643/1592/1278 1642/1591/1277 1665/1600/1286 1666/1601/1287\nf 1645/1595/1281 1644/1594/1280 1667/1602/1288 1668/1603/1289\nf 1646/1582/1268 1645/1595/1281 1668/1603/1289 1669/1604/1290\nf 1647/1583/1269 1646/1582/1268 1669/1604/1290 1670/1605/1291\nf 1636/1584/1270 1647/1583/1269 1670/1605/1291 1660/1606/1292\nf 1644/1594/1280 2035/1593/1279 2036/1607/1293 1667/1602/1288\nf 1662/1597/1283 1661/1596/1282 1673/1608/1294 1674/1609/1295\nf 1663/1598/1284 1662/1597/1283 1674/1609/1295 1675/1610/1296\nf 1664/1599/1285 1663/1598/1284 1675/1610/1296 1676/1611/1297\nf 1665/1600/1286 1664/1599/1285 1676/1611/1297 1677/1612/1298\nf 1666/1601/1287 1665/1600/1286 1677/1612/1298 1678/1613/1299\nf 1668/1603/1289 1667/1602/1288 1679/1614/1300 1680/1615/1301\nf 1669/1604/1290 1668/1603/1289 1680/1615/1301 1681/1616/1302\nf 1670/1605/1291 1669/1604/1290 1681/1616/1302 1682/1617/1303\nf 1660/1606/1292 1670/1605/1291 1682/1617/1303 1671/1618/1304\nf 1667/1602/1288 2036/1607/1293 2037/1619/1305 1679/1614/1300\nf 1674/1609/1295 1673/1608/1294 1672/1620/1306 1685/1621/1307\nf 2037/1619/1305 2038/1622/1308 1680/1615/1301 1679/1614/1300\nf 1675/1610/1296 1683/1623/1309 1684/1624/1310 1676/1611/1297\nf 1681/1616/1302 2039/1625/1311 2040/1626/1312 1682/1617/1303\nf 2038/1622/1308 2039/1625/1311 1681/1616/1302 1680/1615/1301\nf 1676/1611/1297 1684/1624/1310 1678/1613/1299 1677/1612/1298\nf 1674/1609/1295 1685/1621/1307 1683/1623/1309 1675/1610/1296\nf 1682/1617/1303 2040/1626/1312 2041/1627/1313 1671/1618/1304\nf 1513/1422/1108 1514/1421/1107 1687/1628/1314 1686/1629/1315\nf 1514/1421/1107 1515/1423/1109 1688/1630/1316 1687/1628/1314\nf 1515/1423/1109 1516/1424/1110 1689/1631/1317 1688/1630/1316\nf 1516/1424/1110 1517/1425/1111 1690/1632/1318 1689/1631/1317\nf 1518/1426/1112 1513/1422/1108 1686/1629/1315 1691/1633/1319\nf 1519/1428/1114 1518/1426/1112 1691/1633/1319 1692/1634/1320\nf 2031/1538/1224 1605/1537/1223 1693/1635/1321 2030/1636/1322\nf 1517/1425/1111 1606/1535/1221 1694/1637/1323 1690/1632/1318\nf 2068/1638/1324 2069/1541/1227 1610/1542/1228 1696/1639/1325\nf 1696/1639/1325 1610/1542/1228 1609/1544/1230 1695/1640/1326\nf 2011/1641/1327 2012/1642/1328 2013/1643/1329 2014/1644/1330\nf 1707/1645/1331 2012/1642/1328 1597/1527/1213 1596/1525/1211\nf 1718/1646/1332 1699/1647/1333 2085/1648/1334 2086/1649/1335\nf 1047/1650/1336 1043/1651/1337 1716/1652/1338 1704/1653/1339\nf 1717/1654/1340 1700/1655/1341 1704/1653/1339 1716/1652/1338\nf 1699/1647/1333 1707/1645/1331 2084/1656/1342 2085/1648/1334\nf 1949/1657/1343 1950/1658/1344 1725/1659/1345 1724/1660/1346\nf 1595/1523/1209 1708/1661/1347 1707/1645/1331 1596/1525/1211\nf 2084/1656/1342 1707/1645/1331 1708/1661/1347 2083/1662/1348\nf 1595/1523/1209 1533/1450/1136 1711/1663/1349 1708/1661/1347\nf 2083/1662/1348 1708/1661/1347 1711/1663/1349 2082/1664/1350\nf 1709/1665/1351 1584/1454/1140 1532/1518/1204 1705/1666/1352\nf 2080/1667/1353 1709/1665/1351 1705/1666/1352 2079/1668/1354\nf 1710/1669/1355 1531/1449/1135 1584/1454/1140 1709/1665/1351\nf 2081/1670/1356 1710/1669/1355 1709/1665/1351 2080/1667/1353\nf 1533/1450/1136 1531/1449/1135 1710/1669/1355 1711/1663/1349\nf 2082/1664/1350 1711/1663/1349 1710/1669/1355 2081/1670/1356\nf 1726/1671/1357 1951/1672/1358 1952/1673/1359 1727/1674/1360\nf 1700/1655/1341 1712/1675/1361 1713/1676/1362 1704/1653/1339\nf 1704/1653/1339 1713/1676/1362 1046/1677/1363 1047/1650/1336\nf 1725/1659/1345 1950/1658/1344 1951/1672/1358 1726/1671/1357\nf 1948/1678/1364 1949/1657/1343 1724/1660/1346 1723/1679/1365\nf 1043/1651/1337 1049/1680/1366 1703/1681/1367 1716/1652/1338\nf 1701/1682/1368 1717/1654/1340 1716/1652/1338 1703/1681/1367\nf 1702/1683/1369 1718/1646/1332 2086/1649/1335 2087/1684/1370\nf 1718/1646/1332 1702/1683/1369 1697/1685/1371 1719/1686/1372\nf 1720/1687/1373 1719/1686/1372 1697/1685/1371 1698/1688/1374\nf 1947/1689/1375 1948/1678/1364 1723/1679/1365 1722/1690/1376\nf 1721/1691/1377 1946/1692/1378 1947/1689/1375 1722/1690/1376\nf 1728/1693/1379 1727/1674/1360 1952/1673/1359 1953/1694/1380\nf 1954/1695/1381 1729/1696/1382 1728/1693/1379 1953/1694/1380\nf 1957/1697/1383 1958/1698/1384 1706/1699/1385 1715/1700/1386\nf 1715/1700/1386 1714/1701/1387 1734/1702/1388 1733/1703/1389\nf 1735/1704/1390 1734/1702/1388 1714/1701/1387 1712/1675/1361\nf 1736/1705/1391 1735/1704/1390 1712/1675/1361 1700/1655/1341\nf 1737/1706/1392 1736/1705/1391 1700/1655/1341 1717/1654/1340\nf 1738/1707/1393 1737/1706/1392 1717/1654/1340 1701/1682/1368\nf 2030/1636/1322 1693/1635/1321 1765/1708/1394 2029/1709/1395\nf 1690/1632/1318 1694/1637/1323 1766/1710/1396 1740/1711/1397\nf 1742/1712/1398 1774/1713/1399 1741/1714/1400 1764/1715/1401\nf 2068/1638/1324 1696/1639/1325 1742/1712/1398 2067/1716/1402\nf 1689/1631/1317 1690/1632/1318 1740/1711/1397 1743/1717/1403\nf 1692/1634/1320 1691/1633/1319 1749/1718/1404 1747/1719/1405\nf 1745/1720/1406 1688/1630/1316 1689/1631/1317 1743/1717/1403\nf 1746/1721/1407 1687/1628/1314 1688/1630/1316 1745/1720/1406\nf 1748/1722/1408 1686/1629/1315 1687/1628/1314 1746/1721/1407\nf 1749/1718/1404 1691/1633/1319 1686/1629/1315 1748/1722/1408\nf 1743/1717/1403 1740/1711/1397 1767/1723/1409 1768/1724/1410\nf 1745/1720/1406 1743/1717/1403 1768/1724/1410 1769/1725/1411\nf 1746/1721/1407 1745/1720/1406 1769/1725/1411 1770/1726/1412\nf 1748/1722/1408 1746/1721/1407 1770/1726/1412 1771/1727/1413\nf 1749/1718/1404 1748/1722/1408 1771/1727/1413 1772/1728/1414\nf 1747/1719/1405 1749/1718/1404 1772/1728/1414 1773/1729/1415\nf 2026/1730/1416 1935/1731/1417 1782/1732/1418 2025/1733/1419\nf 2066/1734/1420 1764/1715/1401 1779/1735/1421 2065/1736/1422\nf 2028/1737/1423 1780/1738/1424 1781/1739/1425 2027/1740/1426\nf 2025/1733/1419 1782/1732/1418 1945/1741/1427 2024/1742/1428\nf 1933/1743/1429 1934/1744/1430 1750/1745/1431 1751/1746/1432\nf 1932/1747/1433 1933/1743/1429 1751/1746/1432 1752/1748/1434\nf 1931/1749/1435 1932/1747/1433 1752/1748/1434 1753/1750/1436\nf 1930/1751/1437 1931/1749/1435 1753/1750/1436 1754/1752/1438\nf 1929/1753/1439 1930/1751/1437 1754/1752/1438 1755/1754/1440\nf 1928/1755/1441 1929/1753/1439 1755/1754/1440 1756/1756/1442\nf 1927/1757/1443 1928/1755/1441 1756/1756/1442 1757/1758/1444\nf 1740/1711/1397 1766/1710/1396 1739/1759/1445 1767/1723/1409\nf 1696/1639/1325 1695/1640/1326 1774/1713/1399 1742/1712/1398\nf 1936/1760/1446 1937/1761/1447 1777/1522/1208 1776/1521/1207\nf 1937/1761/1447 1938/1762/1448 1778/1763/1449 1777/1522/1208\nf 1938/1762/1448 1939/1531/1217 1600/1529/1215 1778/1763/1449\nf 1966/1764/1450 1967/1519/1205 1777/1522/1208 1778/1763/1449\nf 1600/1529/1215 1965/1765/1451 1966/1764/1450 1778/1763/1449\nf 1534/1448/1134 1964/1766/1452 1965/1765/1451 1600/1529/1215\nf 1963/1767/1453 1964/1766/1452 1534/1448/1134 1535/1447/1133\nf 1583/1446/1132 1962/1768/1454 1963/1767/1453 1535/1447/1133\nf 1536/1516/1202 1961/1769/1455 1962/1768/1454 1583/1446/1132\nf 1597/1527/1213 1598/1770/1456 1783/1771/1457 1784/1528/1214\nf 1792/1772/1458 1254/1773/1459 1050/1774/1460 1793/1775/1461\nf 1738/1707/1393 1701/1682/1368 1794/1776/1462 1796/1777/1463\nf 1956/1778/1464 1051/1779/1465 1056/1780/1466 1795/1781/1467\nf 1729/1696/1382 1954/1695/1381 1955/1782/1468 1797/1783/1469\nf 1794/1776/1462 1792/1772/1458 1793/1775/1461 1796/1777/1463\nf 1956/1778/1464 1795/1781/1467 1797/1783/1469 1955/1782/1468\nf 1758/1784/1470 1744/1785/1471 2016/1786/1472 2017/1787/1473\nf 1763/1788/1474 1760/1789/1475 2021/1790/1476 2022/1791/1477\nf 1791/1792/1478 1758/1784/1470 2017/1787/1473 2018/1793/1479\nf 1761/1794/1480 1762/1795/1481 2019/1796/1482 2020/1797/1483\nf 1760/1789/1475 1761/1794/1480 2020/1797/1483 2021/1790/1476\nf 1759/1798/1484 1763/1788/1474 2022/1791/1477 2023/1799/1485\nf 1744/1785/1471 1775/1800/1486 2015/1801/1487 2016/1786/1472\nf 1762/1795/1481 1791/1792/1478 2018/1793/1479 2019/1796/1482\nf 2015/1801/1487 1775/1800/1486 2011/1641/1327 2014/1644/1330\nf 1751/1746/1432 1750/1745/1431 1807/1802/1488 1808/1803/1489\nf 1752/1748/1434 1751/1746/1432 1808/1803/1489 1809/1804/1490\nf 1753/1750/1436 1752/1748/1434 1809/1804/1490 1810/1805/1491\nf 1754/1752/1438 1753/1750/1436 1810/1805/1491 1811/1806/1492\nf 1755/1754/1440 1754/1752/1438 1811/1806/1492 1812/1807/1493\nf 1756/1756/1442 1755/1754/1440 1812/1807/1493 1813/1808/1494\nf 1757/1758/1444 1756/1756/1442 1813/1808/1494 1814/1809/1495\nf 1881/1810/1496 1815/1811/1497 1883/1812/1498 1882/1813/1499\nf 1848/1814/1500 1816/1815/1501 1850/1816/1502 1849/1817/1503\nf 1829/1818/1504 1817/1819/1505 1831/1820/1506 1830/1821/1507\nf 1821/1822/1508 1818/1823/1509 1823/1824/1510 1822/1825/1511\nf 1805/1826/1512 1801/1827/1513 1819/1828/1514 1820/1829/1515\nf 1807/1802/1488 1805/1826/1512 1820/1829/1515 1808/1803/1489\nf 1819/1828/1514 1821/1822/1508 1822/1825/1511 1820/1829/1515\nf 1822/1825/1511 1809/1804/1490 1808/1803/1489 1820/1829/1515\nf 1823/1824/1510 1810/1805/1491 1809/1804/1490 1822/1825/1511\nf 1804/1830/1516 1803/1831/1517 1824/1832/1518 1826/1833/1519\nf 1801/1827/1513 1800/1834/1520 1825/1835/1521 1819/1828/1514\nf 1800/1834/1520 1804/1830/1516 1826/1833/1519 1825/1835/1521\nf 1827/1836/1522 1818/1823/1509 1821/1822/1508 1828/1837/1523\nf 1821/1822/1508 1819/1828/1514 1825/1835/1521 1828/1837/1523\nf 1824/1832/1518 1829/1818/1504 1830/1821/1507 1826/1833/1519\nf 1830/1821/1507 1828/1837/1523 1825/1835/1521 1826/1833/1519\nf 1831/1820/1506 1827/1836/1522 1828/1837/1523 1830/1821/1507\nf 1832/1838/1524 1839/1839/1525 1838/1840/1526 1837/1841/1527\nf 1835/1842/1528 1834/1843/1529 1833/1844/1530 1836/1845/1531\nf 1823/1824/1510 1818/1823/1509 1834/1843/1529 1835/1842/1528\nf 1811/1806/1492 1810/1805/1491 1823/1824/1510 1835/1842/1528\nf 1812/1807/1493 1811/1806/1492 1835/1842/1528 1836/1845/1531\nf 1836/1845/1531 1833/1844/1530 1837/1841/1527 1838/1840/1526\nf 1813/1808/1494 1812/1807/1493 1836/1845/1531 1838/1840/1526\nf 1839/1839/1525 1814/1809/1495 1813/1808/1494 1838/1840/1526\nf 1843/1846/1532 1840/1847/1533 1845/1848/1534 1844/1849/1535\nf 1841/1850/1536 1833/1844/1530 1834/1843/1529 1842/1851/1537\nf 1834/1843/1529 1818/1823/1509 1827/1836/1522 1842/1851/1537\nf 1817/1819/1505 1843/1846/1532 1844/1849/1535 1831/1820/1506\nf 1844/1849/1535 1842/1851/1537 1827/1836/1522 1831/1820/1506\nf 1845/1848/1534 1841/1850/1536 1842/1851/1537 1844/1849/1535\nf 1846/1852/1538 1832/1838/1524 1837/1841/1527 1847/1853/1539\nf 1837/1841/1527 1833/1844/1530 1841/1850/1536 1847/1853/1539\nf 1840/1847/1533 1848/1814/1500 1849/1817/1503 1845/1848/1534\nf 1849/1817/1503 1847/1853/1539 1841/1850/1536 1845/1848/1534\nf 1850/1816/1502 1846/1852/1538 1847/1853/1539 1849/1817/1503\nf 1862/1854/1540 1851/1855/1541 1864/1856/1542 1863/1857/1543\nf 1855/1858/1544 1852/1859/1545 1857/1860/1546 1856/1861/1547\nf 1802/1862/1548 1799/1863/1549 1853/1864/1550 1854/1865/1551\nf 1803/1831/1517 1802/1862/1548 1854/1865/1551 1824/1832/1518\nf 1853/1864/1550 1855/1858/1544 1856/1861/1547 1854/1865/1551\nf 1856/1861/1547 1829/1818/1504 1824/1832/1518 1854/1865/1551\nf 1857/1860/1546 1817/1819/1505 1829/1818/1504 1856/1861/1547\nf 1806/1866/1552 1720/1687/1373 1698/1688/1374 1859/1867/1553\nf 1799/1863/1549 1798/1868/1554 1858/1869/1555 1853/1864/1550\nf 1798/1868/1554 1806/1866/1552 1859/1867/1553 1858/1869/1555\nf 1860/1870/1556 1852/1859/1545 1855/1858/1544 1861/1871/1557\nf 1855/1858/1544 1853/1864/1550 1858/1869/1555 1861/1871/1557\nf 1698/1688/1374 1862/1854/1540 1863/1857/1543 1859/1867/1553\nf 1863/1857/1543 1861/1871/1557 1858/1869/1555 1859/1867/1553\nf 1864/1856/1542 1860/1870/1556 1861/1871/1557 1863/1857/1543\nf 1865/1872/1558 1872/1873/1559 1871/1874/1560 1870/1875/1561\nf 1868/1876/1562 1867/1877/1563 1866/1878/1564 1869/1879/1565\nf 1857/1860/1546 1852/1859/1545 1867/1877/1563 1868/1876/1562\nf 1843/1846/1532 1817/1819/1505 1857/1860/1546 1868/1876/1562\nf 1840/1847/1533 1843/1846/1532 1868/1876/1562 1869/1879/1565\nf 1869/1879/1565 1866/1878/1564 1870/1875/1561 1871/1874/1560\nf 1848/1814/1500 1840/1847/1533 1869/1879/1565 1871/1874/1560\nf 1872/1873/1559 1816/1815/1501 1848/1814/1500 1871/1874/1560\nf 1876/1880/1566 1873/1881/1567 1878/1882/1568 1877/1883/1569\nf 1874/1884/1570 1866/1878/1564 1867/1877/1563 1875/1885/1571\nf 1867/1877/1563 1852/1859/1545 1860/1870/1556 1875/1885/1571\nf 1851/1855/1541 1876/1880/1566 1877/1883/1569 1864/1856/1542\nf 1877/1883/1569 1875/1885/1571 1860/1870/1556 1864/1856/1542\nf 1878/1882/1568 1874/1884/1570 1875/1885/1571 1877/1883/1569\nf 1879/1886/1572 1865/1872/1558 1870/1875/1561 1880/1887/1573\nf 1870/1875/1561 1866/1878/1564 1874/1884/1570 1880/1887/1573\nf 1873/1881/1567 1881/1810/1496 1882/1813/1499 1878/1882/1568\nf 1882/1813/1499 1880/1887/1573 1874/1884/1570 1878/1882/1568\nf 1883/1812/1498 1879/1886/1572 1880/1887/1573 1882/1813/1499\nf 1046/1677/1363 1713/1676/1362 1885/1888/1574 1045/1889/1575\nf 1885/1888/1574 1713/1676/1362 1712/1675/1361 1714/1701/1387\nf 1886/1890/1576 1885/1888/1574 1714/1701/1387 1715/1700/1386\nf 1045/1889/1575 1885/1888/1574 1886/1890/1576 1048/1891/1577\nf 1886/1890/1576 1715/1700/1386 1706/1699/1385 1884/1892/1578\nf 1884/1892/1578 1044/1893/1579 1048/1891/1577 1886/1890/1576\nf 1792/1772/1458 1703/1681/1367 1049/1680/1366 1254/1773/1459\nf 1792/1772/1458 1794/1776/1462 1701/1682/1368 1703/1681/1367\nf 1702/1683/1369 2087/1684/1370 1895/1894/1580 2077/1895/1581\nf 1887/1896/1582 1899/1897/1583 1052/1898/1584 1057/1899/1585\nf 1055/1900/1586 1892/1901/1587 1795/1781/1467 1056/1780/1466\nf 1053/1902/1588 1891/1903/1589 2078/1904/1590 1054/1905/1591\nf 1893/1906/1592 1898/1907/1593 1899/1897/1583 1887/1896/1582\nf 1894/1908/1594 2077/1895/1581 2078/1904/1590 1891/1903/1589\nf 1895/1894/1580 1797/1783/1469 1795/1781/1467 1892/1901/1587\nf 1889/1909/1595 1898/1907/1593 1893/1906/1592 1888/1910/1596\nf 1702/1683/1369 2077/1895/1581 1894/1908/1594 1890/1911/1597\nf 1702/1683/1369 1890/1911/1597 1896/1912/1598 1697/1685/1371\nf 1890/1911/1597 1889/1909/1595 1897/1913/1599 1896/1912/1598\nf 1862/1854/1540 1698/1688/1374 1697/1685/1371 1896/1912/1598\nf 1851/1855/1541 1862/1854/1540 1896/1912/1598 1897/1913/1599\nf 1890/1911/1597 1894/1908/1594 1898/1907/1593 1889/1909/1595\nf 1899/1897/1583 1898/1907/1593 1894/1908/1594 1891/1903/1589\nf 1052/1898/1584 1899/1897/1583 1891/1903/1589 1053/1902/1588\nf 1815/1811/1497 1881/1810/1496 1900/1914/1600 1901/1915/1601\nf 1873/1881/1567 1876/1880/1566 1902/1916/1602 1903/1917/1603\nf 1876/1880/1566 1851/1855/1541 1897/1913/1599 1902/1916/1602\nf 1881/1810/1496 1873/1881/1567 1903/1917/1603 1900/1914/1600\nf 1900/1914/1600 1904/1918/1604 1905/1919/1605 1901/1915/1601\nf 1902/1916/1602 1906/1920/1606 1907/1921/1607 1903/1917/1603\nf 1889/1909/1595 1906/1920/1606 1902/1916/1602 1897/1913/1599\nf 1907/1921/1607 1904/1918/1604 1900/1914/1600 1903/1917/1603\nf 1905/1919/1605 1904/1918/1604 1908/1922/1608 1909/1923/1609\nf 1907/1921/1607 1906/1920/1606 1910/1924/1610 1911/1925/1611\nf 1906/1920/1606 1889/1909/1595 1888/1910/1596 1910/1924/1610\nf 1904/1918/1604 1907/1921/1607 1911/1925/1611 1908/1922/1608\nf 1913/1926/1612 1256/1927/1613 1255/1928/1614 1912/1929/1615\nf 1914/1930/1616 1257/1931/1617 1256/1927/1613 1913/1926/1612\nf 1919/1932/1618 1258/1933/1619 1257/1931/1617 1914/1930/1616\nf 1925/1934/1620 1926/1935/1621 1909/1923/1609 1908/1922/1608\nf 1925/1934/1620 1908/1922/1608 1911/1925/1611 1924/1936/1622\nf 1913/1926/1612 1915/1937/1623 1917/1938/1624 1914/1930/1616\nf 1913/1926/1612 1912/1929/1615 1916/1939/1625 1915/1937/1623\nf 1924/1936/1622 1911/1925/1611 1910/1924/1610 1923/1940/1626\nf 1914/1930/1616 1917/1938/1624 1918/1941/1627 1919/1932/1618\nf 1923/1940/1626 1910/1924/1610 1888/1910/1596 1922/1942/1628\nf 1919/1932/1618 1918/1941/1627 1920/1943/1629 1921/1944/1630\nf 1259/1945/1631 1258/1933/1619 1919/1932/1618 1921/1944/1630\nf 1920/1943/1629 1922/1942/1628 1888/1910/1596 1893/1906/1592\nf 1921/1944/1630 1920/1943/1629 1893/1906/1592 1887/1896/1582\nf 1057/1899/1585 1259/1945/1631 1921/1944/1630 1887/1896/1582\nf 1918/1941/1627 1923/1940/1626 1922/1942/1628 1920/1943/1629\nf 1917/1938/1624 1924/1936/1622 1923/1940/1626 1918/1941/1627\nf 1915/1937/1623 1925/1934/1620 1924/1936/1622 1917/1938/1624\nf 1915/1937/1623 1916/1939/1625 1926/1935/1621 1925/1934/1620\nf 1773/1729/1415 1772/1728/1414 1928/1755/1441 1927/1757/1443\nf 1772/1728/1414 1771/1727/1413 1929/1753/1439 1928/1755/1441\nf 1771/1727/1413 1770/1726/1412 1930/1751/1437 1929/1753/1439\nf 1770/1726/1412 1769/1725/1411 1931/1749/1435 1930/1751/1437\nf 1769/1725/1411 1768/1724/1410 1932/1747/1433 1931/1749/1435\nf 1768/1724/1410 1767/1723/1409 1933/1743/1429 1932/1747/1433\nf 1767/1723/1409 1739/1759/1445 1934/1744/1430 1933/1743/1429\nf 2027/1740/1426 1781/1739/1425 1935/1731/1417 2026/1730/1416\nf 1695/1640/1326 1609/1544/1230 1937/1761/1447 1936/1760/1446\nf 1609/1544/1230 1607/1543/1229 1938/1762/1448 1937/1761/1447\nf 1607/1543/1229 1601/1532/1218 1939/1531/1217 1938/1762/1448\nf 1520/1442/1128 1940/1441/1127 1939/1531/1217 1601/1532/1218\nf 1529/1443/1129 1941/1438/1124 1940/1441/1127 1520/1442/1128\nf 1558/1488/1174 1942/1485/1171 1941/1438/1124 1529/1443/1129\nf 1590/1476/1162 1943/1468/1154 1942/1485/1171 1558/1488/1174\nf 1543/1475/1161 1944/1465/1151 1943/1468/1154 1590/1476/1162\nf 1557/1479/1165 1556/1482/1168 2093/1946/1632 2094/1947/1633\nf 1553/1483/1169 1557/1479/1165 2094/1947/1633 2095/1948/1634\nf 1566/1478/1164 1553/1483/1169 2095/1948/1634 2091/1949/1635\nf 1546/1464/1150 1545/1463/1149 2097/1950/1636 2098/1951/1637\nf 1545/1463/1149 1544/1474/1160 2096/1952/1638 2097/1950/1636\nf 2090/1953/1639 1559/1466/1152 1944/1465/1151 2088/1954/1640\nf 2024/1742/1428 1945/1741/1427 1759/1798/1484 2023/1799/1485\nf 1946/1692/1378 1730/1955/1641 1731/1956/1642 1947/1689/1375\nf 1731/1956/1642 1732/1957/1643 1948/1678/1364 1947/1689/1375\nf 1732/1957/1643 1733/1703/1389 1949/1657/1343 1948/1678/1364\nf 1733/1703/1389 1734/1702/1388 1950/1658/1344 1949/1657/1343\nf 1951/1672/1358 1950/1658/1344 1734/1702/1388 1735/1704/1390\nf 1952/1673/1359 1951/1672/1358 1735/1704/1390 1736/1705/1391\nf 1953/1694/1380 1952/1673/1359 1736/1705/1391 1737/1706/1392\nf 1738/1707/1393 1954/1695/1381 1953/1694/1380 1737/1706/1392\nf 1955/1782/1468 1954/1695/1381 1738/1707/1393 1796/1777/1463\nf 1793/1775/1461 1956/1778/1464 1955/1782/1468 1796/1777/1463\nf 1793/1775/1461 1050/1774/1460 1051/1779/1465 1956/1778/1464\nf 1957/1697/1383 1715/1700/1386 1733/1703/1389 1732/1957/1643\nf 1731/1956/1642 1960/1958/1644 1957/1697/1383 1732/1957/1643\nf 1731/1956/1642 1730/1955/1641 1959/1959/1645 1960/1958/1644\nf 1957/1697/1383 1960/1958/1644 1959/1959/1645 1958/1698/1384\nf 1961/1769/1455 1790/1517/1203 1789/1453/1139 1962/1768/1454\nf 1963/1767/1453 1962/1768/1454 1789/1453/1139 1788/1452/1138\nf 1788/1452/1138 1787/1451/1137 1964/1766/1452 1963/1767/1453\nf 1965/1765/1451 1964/1766/1452 1787/1451/1137 1786/1524/1210\nf 1966/1764/1450 1965/1765/1451 1786/1524/1210 1785/1526/1212\nf 1785/1526/1212 1784/1528/1214 1967/1519/1205 1966/1764/1450\nf 1784/1528/1214 1783/1771/1457 1599/1520/1206 1967/1519/1205\nf 2064/1960/1646 1983/1961/1647 1968/1962/1648 2063/1963/1649\nf 1973/1964/1650 1970/1965/1651 1971/1966/1652 1972/1967/1653\nf 1974/1968/1654 1975/1969/1655 1970/1965/1651 1973/1964/1650\nf 1982/1970/1656 1969/1971/1657 1975/1969/1655 1974/1968/1654\nf 1972/1967/1653 1971/1966/1652 1976/1972/1658 1981/1973/1659\nf 1981/1973/1659 1976/1972/1658 1977/1974/1660 1980/1975/1661\nf 1980/1975/1661 1977/1974/1660 1978/1976/1662 1979/1977/1663\nf 2065/1736/1422 1779/1735/1421 1983/1961/1647 2064/1960/1646\nf 1935/1731/1417 1973/1964/1650 1988/1978/1664 1782/1732/1418\nf 1974/1968/1654 1973/1964/1650 1935/1731/1417 1781/1739/1425\nf 1980/1975/1661 1979/1977/1663 1985/1979/1665 1986/1980/1666\nf 1981/1973/1659 1980/1975/1661 1986/1980/1666 1987/1981/1667\nf 1972/1967/1653 1981/1973/1659 1987/1981/1667 1984/1982/1668\nf 1982/1970/1656 1974/1968/1654 1781/1739/1425 1780/1738/1424\nf 1973/1964/1650 1972/1967/1653 1984/1982/1668 1988/1978/1664\nf 1945/1741/1427 1782/1732/1418 1988/1978/1664 1984/1982/1668\nf 1759/1798/1484 1945/1741/1427 1984/1982/1668 1987/1981/1667\nf 1763/1788/1474 1759/1798/1484 1987/1981/1667 1986/1980/1666\nf 1760/1789/1475 1763/1788/1474 1986/1980/1666 1985/1979/1665\nf 1979/1977/1663 1978/1976/1662 1989/1983/1669 1996/1984/1670\nf 1996/1984/1670 1989/1983/1669 1990/1985/1671 1995/1986/1672\nf 1995/1986/1672 1990/1985/1671 1991/1987/1673 1994/1988/1674\nf 1994/1988/1674 1991/1987/1673 1992/1989/1675 1993/1990/1676\nf 1994/1988/1674 1993/1990/1676 1997/1991/1677 1998/1992/1678\nf 1995/1986/1672 1994/1988/1674 1998/1992/1678 1999/1993/1679\nf 1996/1984/1670 1995/1986/1672 1999/1993/1679 2000/1994/1680\nf 1979/1977/1663 1996/1984/1670 2000/1994/1680 1985/1979/1665\nf 1999/1993/1679 1762/1795/1481 1761/1794/1480 2000/1994/1680\nf 2000/1994/1680 1761/1794/1480 1760/1789/1475 1985/1979/1665\nf 1758/1784/1470 1791/1792/1478 1998/1992/1678 1997/1991/1677\nf 1998/1992/1678 1791/1792/1478 1762/1795/1481 1999/1993/1679\nf 1993/1990/1676 1992/1989/1675 2001/1995/1681 2004/1996/1682\nf 2003/1997/1683 2002/1998/1684 1599/1520/1206 1783/1771/1457\nf 2004/1996/1682 2001/1995/1681 2002/1998/1684 2003/1997/1683\nf 1758/1784/1470 1997/1991/1677 2005/1999/1685 1744/1785/1471\nf 2003/1997/1683 2006/2000/1686 2005/1999/1685 2004/1996/1682\nf 1744/1785/1471 2005/1999/1685 2006/2000/1686 1775/1800/1486\nf 1598/1770/1456 2006/2000/1686 2003/1997/1683 1783/1771/1457\nf 2004/1996/1682 2005/1999/1685 1997/1991/1677 1993/1990/1676\nf 2007/2001/1687 1774/1713/1399 1695/1640/1326 1936/1760/1446\nf 1741/1714/1400 1774/1713/1399 2007/2001/1687 2008/2002/1688\nf 2008/2002/1688 2007/2001/1687 2009/2003/1689 2010/2004/1690\nf 2009/2003/1689 2007/2001/1687 1936/1760/1446 1776/1521/1207\nf 2002/1998/1684 2009/2003/1689 1776/1521/1207 1599/1520/1206\nf 2010/2004/1690 2009/2003/1689 2002/1998/1684 2001/1995/1681\nf 1775/1800/1486 2006/2000/1686 1598/1770/1456 2011/1641/1327\nf 1598/1770/1456 1597/1527/1213 2012/1642/1328 2011/1641/1327\nf 2012/1642/1328 1707/1645/1331 1699/1647/1333 2013/1643/1329\nf 2014/1644/1330 2013/1643/1329 1719/1686/1372 1720/1687/1373\nf 1806/1866/1552 2015/1801/1487 2014/1644/1330 1720/1687/1373\nf 2016/1786/1472 2015/1801/1487 1806/1866/1552 1798/1868/1554\nf 2017/1787/1473 2016/1786/1472 1798/1868/1554 1799/1863/1549\nf 2018/1793/1479 2017/1787/1473 1799/1863/1549 1802/1862/1548\nf 2019/1796/1482 2018/1793/1479 1802/1862/1548 1803/1831/1517\nf 2020/1797/1483 2019/1796/1482 1803/1831/1517 1804/1830/1516\nf 2021/1790/1476 2020/1797/1483 1804/1830/1516 1800/1834/1520\nf 2022/1791/1477 2021/1790/1476 1800/1834/1520 1801/1827/1513\nf 2023/1799/1485 2022/1791/1477 1801/1827/1513 1805/1826/1512\nf 1807/1802/1488 2024/1742/1428 2023/1799/1485 1805/1826/1512\nf 1750/1745/1431 2025/1733/1419 2024/1742/1428 1807/1802/1488\nf 1934/1744/1430 2026/1730/1416 2025/1733/1419 1750/1745/1431\nf 1739/1759/1445 2027/1740/1426 2026/1730/1416 1934/1744/1430\nf 2029/1709/1395 2027/1740/1426 1739/1759/1445 1766/1710/1396\nf 1764/1715/1401 2066/1734/1420 2067/1716/1402 1742/1712/1398\nf 2013/1643/1329 1699/1647/1333 1718/1646/1332 1719/1686/1372\nf 1694/1637/1323 2030/1636/1322 2029/1709/1395 1766/1710/1396\nf 1606/1535/1221 2031/1538/1224 2030/1636/1322 1694/1637/1323\nf 2032/1455/1141 2031/1538/1224 1606/1535/1221 1538/1392/1078\nf 2033/1456/1142 2032/1455/1141 1538/1392/1078 1537/1391/1077\nf 2034/1580/1266 2033/1456/1142 1537/1391/1077 1657/1575/1261\nf 2035/1593/1279 2034/1580/1266 1657/1575/1261 1643/1592/1278\nf 2036/1607/1293 2035/1593/1279 1643/1592/1278 1666/1601/1287\nf 2037/1619/1305 2036/1607/1293 1666/1601/1287 1678/1613/1299\nf 1678/1613/1299 1684/1624/1310 2038/1622/1308 2037/1619/1305\nf 1684/1624/1310 1683/1623/1309 2039/1625/1311 2038/1622/1308\nf 2040/1626/1312 2039/1625/1311 1683/1623/1309 1685/1621/1307\nf 2041/1627/1313 2040/1626/1312 1685/1621/1307 1672/1620/1306\nf 1765/1708/1394 2028/1737/1423 2027/1740/1426 2029/1709/1395\nf 1651/1581/1267 2043/1569/1255 2042/1585/1271 1637/1586/1272\nf 1539/1458/1144 2044/1377/1063 2043/1569/1255 1651/1581/1267\nf 1539/1458/1144 1540/1457/1143 2045/1378/1064 2044/1377/1063\nf 1540/1457/1143 1541/1459/1145 2046/1401/1087 2045/1378/1064\nf 1541/1459/1145 1542/1460/1146 2047/1403/1089 2046/1401/1087\nf 1661/1596/1282 2048/2005/1691 1672/1620/1306 1673/1608/1294\nf 1637/1586/1272 2048/2005/1691 1661/1596/1282 1638/1587/1273\nf 2042/1585/1271 2049/2006/1692 2048/2005/1691 1637/1586/1272\nf 1672/1620/1306 2048/2005/1691 2049/2006/1692 2041/1627/1313\nf 1636/1584/1270 1660/1606/1292 2049/2006/1692 2042/1585/1271\nf 2041/1627/1313 2049/2006/1692 1660/1606/1292 1671/1618/1304\nf 1779/1735/1421 2054/2007/1693 2055/2008/1694 1983/1961/1647\nf 2010/2004/1690 2001/1995/1681 1992/1989/1675 2053/2009/1695\nf 2053/2009/1695 1992/1989/1675 1991/1987/1673 2052/2010/1696\nf 2052/2010/1696 1991/1987/1673 1990/1985/1671 2051/2011/1697\nf 2051/2011/1697 1990/1985/1671 1989/1983/1669 2050/2012/1698\nf 2056/2013/1699 2058/2014/1700 2057/2015/1701 1968/1962/1648\nf 2056/2013/1699 1968/1962/1648 1983/1961/1647 2055/2008/1694\nf 1741/1714/1400 2054/2007/1693 1779/1735/1421 1764/1715/1401\nf 1741/1714/1400 2008/2002/1688 2010/2004/1690 2054/2007/1693\nf 2055/2008/1694 2054/2007/1693 2010/2004/1690 2053/2009/1695\nf 2052/2010/1696 2056/2013/1699 2055/2008/1694 2053/2009/1695\nf 2051/2011/1697 2050/2012/1698 2057/2015/1701 2058/2014/1700\nf 2051/2011/1697 2058/2014/1700 2056/2013/1699 2052/2010/1696\nf 1970/1965/1651 1975/1969/1655 1969/1971/1657 2059/2016/1702\nf 2062/2017/1703 2063/1963/1649 1968/1962/1648 2057/2015/1701\nf 1971/1966/1652 1970/1965/1651 2059/2016/1702 2060/2018/1704\nf 2061/2019/1705 2062/2017/1703 2057/2015/1701 2050/2012/1698\nf 1977/1974/1660 1976/1972/1658 1971/1966/1652 2060/2018/1704\nf 2061/2019/1705 1978/1976/1662 1977/1974/1660 2060/2018/1704\nf 2060/2018/1704 2059/2016/1702 2062/2017/1703 2061/2019/1705\nf 2059/2016/1702 1969/1971/1657 2063/1963/1649 2062/2017/1703\nf 1982/1970/1656 2064/1960/1646 2063/1963/1649 1969/1971/1657\nf 1780/1738/1424 2065/1736/1422 2064/1960/1646 1982/1970/1656\nf 2028/1737/1423 2066/1734/1420 2065/1736/1422 1780/1738/1424\nf 2067/1716/1402 2066/1734/1420 2028/1737/1423 1765/1708/1394\nf 1693/1635/1321 2068/1638/1324 2067/1716/1402 1765/1708/1394\nf 1693/1635/1321 1605/1537/1223 2069/1541/1227 2068/1638/1324\nf 1605/1537/1223 1604/1536/1222 2070/1539/1225 2069/1541/1227\nf 1604/1536/1222 1603/1530/1216 2071/1534/1220 2070/1539/1225\nf 2072/1414/1100 2071/1534/1220 1603/1530/1216 1507/1420/1106\nf 1510/1419/1105 2073/1411/1097 2072/1414/1100 1507/1420/1106\nf 1579/1511/1197 2074/1491/1177 2073/1411/1097 1510/1419/1105\nf 1579/1511/1197 1580/1512/1198 2075/1492/1178 2074/1491/1177\nf 1580/1512/1198 1581/1513/1199 2076/1509/1195 2075/1492/1178\nf 1989/1983/1669 1978/1976/1662 2061/2019/1705 2050/2012/1698\nf 1577/1508/1194 1576/1507/1193 1634/1560/1246 1635/1567/1253\nf 1622/1558/1244 1623/1561/1247 1626/1565/1251 1625/1562/1248\nf 2078/1904/1590 2077/1895/1581 1895/1894/1580 1892/1901/1587\nf 1054/1905/1591 2078/1904/1590 1892/1901/1587 1055/1900/1586\nf 1722/1690/1376 2080/1667/1353 2079/1668/1354 1721/1691/1377\nf 1723/1679/1365 2081/1670/1356 2080/1667/1353 1722/1690/1376\nf 1724/1660/1346 2082/1664/1350 2081/1670/1356 1723/1679/1365\nf 1725/1659/1345 2083/1662/1348 2082/1664/1350 1724/1660/1346\nf 1726/1671/1357 2084/1656/1342 2083/1662/1348 1725/1659/1345\nf 2085/1648/1334 2084/1656/1342 1726/1671/1357 1727/1674/1360\nf 2086/1649/1335 2085/1648/1334 1727/1674/1360 1728/1693/1379\nf 2087/1684/1370 2086/1649/1335 1728/1693/1379 1729/1696/1382\nf 1895/1894/1580 2087/1684/1370 1729/1696/1382 1797/1783/1469\nf 2089/2020/1706 1565/1490/1176 1559/1466/1152 2090/1953/1639\nf 2092/2021/1707 1543/1475/1161 1566/1478/1164 2091/1949/1635\nf 1944/1465/1151 1543/1475/1161 2092/2021/1707 2088/2022/1640\nf 1544/1474/1160 1565/1490/1176 2089/2020/1706 2096/1952/1638\nf 2611/2023/1708 2099/2024/1709 2109/2025/1710 2612/2026/1711\nf 2101/2027/1712 2100/2028/1713 2110/2029/1714 2111/2030/1715\nf 2102/2031/1716 2101/2027/1712 2111/2030/1715 2112/2032/1717\nf 2103/2033/1718 2102/2031/1716 2112/2032/1717 2113/2034/1719\nf 2104/2035/1720 2103/2033/1718 2113/2034/1719 2114/2036/1721\nf 2151/2037/1722 2104/2035/1720 2114/2036/1721 2152/2038/1723\nf 2106/2039/1724 2105/2040/1725 2115/2041/1726 2116/2042/1727\nf 2107/2043/1728 2106/2039/1724 2116/2042/1727 2117/2044/1729\nf 2108/2045/1730 2107/2043/1728 2117/2044/1729 2118/2046/1731\nf 2099/2024/1709 2108/2045/1730 2118/2046/1731 2109/2025/1710\nf 2612/2026/1711 2109/2025/1710 2119/2047/1732 2613/2048/1733\nf 2613/2048/1733 2119/2047/1732 1497/1404/1090 2047/1403/1089\nf 2119/2047/1732 2109/2025/1710 2123/2049/1734 2124/2050/1735\nf 1497/1404/1090 2119/2047/1732 2124/2050/1735 1504/1407/1093\nf 2124/2050/1735 2123/2049/1734 2121/2051/1736 2122/2052/1737\nf 1504/1407/1093 2124/2050/1735 2122/2052/1737 1501/1410/1096\nf 2639/2053/1738 2638/2054/1739 2128/2055/1740 2129/2056/1741\nf 2125/2057/1742 2123/2049/1734 2109/2025/1710 2118/2046/1731\nf 2126/2058/1743 2125/2057/1742 2118/2046/1731 2117/2044/1729\nf 2121/2051/1736 2123/2049/1734 2125/2057/1742 2132/2059/1744\nf 2132/2059/1744 2125/2057/1742 2126/2058/1743 2131/2060/1745\nf 2131/2060/1745 2126/2058/1743 2127/2061/1746 2130/2062/1747\nf 2111/2030/1715 2110/2029/1714 2133/2063/1748 2134/2064/1749\nf 2112/2032/1717 2111/2030/1715 2134/2064/1749 2135/2065/1750\nf 2113/2034/1719 2112/2032/1717 2135/2065/1750 2136/2066/1751\nf 2114/2036/1721 2113/2034/1719 2136/2066/1751 2137/2067/1752\nf 2110/2029/1714 2120/2068/1753 2138/2069/1754 2133/2063/1748\nf 2120/2068/1753 1498/1429/1115 1519/1428/1114 2138/2069/1754\nf 2145/2070/1755 2140/2071/1756 2141/2072/1757 2144/2073/1758\nf 2143/2074/1759 2142/2075/1760 1524/1436/1122 1525/1435/1121\nf 2144/2073/1758 2141/2072/1757 2142/2075/1760 2143/2074/1759\nf 2512/2076/1761 2511/2077/1762 2171/2078/1763 2170/2079/1764\nf 2139/2080/1765 2146/2081/1766 2129/2056/1741 2128/2055/1740\nf 2142/2075/1760 2141/2072/1757 2187/2082/1767 2214/2083/1768\nf 2187/2082/1767 2141/2072/1757 2150/2084/1769 2188/2085/1770\nf 2150/2084/1769 2141/2072/1757 2140/2071/1756 2149/2086/1771\nf 2147/2087/1772 2379/2088/1773 2378/2089/1774 2148/2090/1775\nf 2380/2091/1776 2379/2088/1773 2147/2087/1772 2189/2092/1777\nf 2105/2040/1725 2600/2093/1778 2599/2094/1779 2115/2041/1726\nf 2100/2028/1713 2153/2095/1780 2154/2096/1781 2110/2029/1714\nf 2110/2029/1714 2154/2096/1781 2155/2097/1782 2120/2068/1753\nf 2120/2068/1753 2155/2097/1782 1542/1460/1146 1498/1429/1115\nf 1585/1461/1147 1546/1464/1150 2158/2098/1783 2190/2099/1784\nf 2515/2100/1785 2514/2101/1786 2193/2102/1787 2168/2103/1788\nf 2161/2104/1789 2159/2105/1790 2145/2070/1755 2144/2073/1758\nf 1525/1435/1121 1548/1472/1158 2160/2106/1791 2143/2074/1759\nf 2158/2098/1783 2157/2107/1792 2191/2108/1793 2190/2099/1784\nf 2160/2106/1791 2161/2104/1789 2144/2073/1758 2143/2074/1759\nf 2156/2109/1794 2174/2110/1795 2195/2111/1796 2194/2112/1797\nf 2166/2113/1798 1556/1482/1168 1594/1481/1167 2197/2114/1799\nf 2164/2115/1800 2166/2113/1798 2197/2114/1799 2196/2116/1801\nf 2513/2117/1802 2512/2076/1761 2170/2079/1764 2169/2118/1803\nf 2146/2081/1766 2167/2119/1804 2162/2120/1805 2129/2056/1741\nf 2157/2107/1792 2173/2121/1806 2192/2122/1807 2191/2108/1793\nf 2145/2070/1755 2159/2105/1790 2169/2118/1803 2170/2079/1764\nf 2140/2071/1756 2145/2070/1755 2170/2079/1764 2171/2078/1763\nf 2640/2123/1808 2184/2124/1809 2172/2125/1810 2641/2126/1811\nf 1555/1495/1181 1564/1497/1183 2172/2125/1810 2165/2127/1812\nf 2168/2103/1788 2193/2102/1787 2192/2122/1807 2173/2121/1806\nf 2174/2110/1795 2164/2115/1800 2196/2116/1801 2195/2111/1796\nf 2175/2128/1813 1567/1499/1185 1501/1410/1096 2122/2052/1737\nf 2131/2060/1745 2178/2129/1814 2177/2130/1815 2132/2059/1744\nf 2177/2130/1815 2176/2131/1816 2121/2051/1736 2132/2059/1744\nf 2176/2131/1816 2175/2128/1813 2122/2052/1737 2121/2051/1736\nf 2131/2060/1745 2180/2132/1817 2179/2133/1818 2178/2129/1814\nf 2180/2132/1817 2182/2134/1819 2181/2135/1820 2179/2133/1818\nf 2182/2134/1819 1577/1508/1194 2183/2136/1821 2181/2135/1820\nf 2641/2126/1811 2172/2125/1810 1564/1497/1183 2076/1509/1195\nf 2165/2127/1812 2172/2125/1810 2184/2124/1809 2163/2137/1822\nf 2163/2137/1822 2184/2124/1809 2129/2056/1741 2162/2120/1805\nf 2640/2123/1808 2639/2053/1738 2129/2056/1741 2184/2124/1809\nf 2180/2132/1817 2131/2060/1745 2130/2062/1747 2185/2138/1823\nf 2180/2132/1817 2185/2138/1823 2186/2139/1824 2182/2134/1819\nf 2182/2134/1819 2186/2139/1824 1581/1513/1199 1577/1508/1194\nf 1612/1514/1200 2214/2083/1768 2187/2082/1767 1530/1515/1201\nf 1530/1515/1201 2187/2082/1767 2188/2085/1770 1536/1516/1202\nf 1790/1517/1203 2380/2091/1776 2189/2092/1777 1532/1518/1204\nf 1548/1472/1158 1585/1461/1147 2190/2099/1784 2160/2106/1791\nf 2191/2108/1793 2161/2104/1789 2160/2106/1791 2190/2099/1784\nf 2192/2122/1807 2159/2105/1790 2161/2104/1789 2191/2108/1793\nf 2193/2102/1787 2169/2118/1803 2159/2105/1790 2192/2122/1807\nf 2514/2101/1786 2513/2117/1802 2169/2118/1803 2193/2102/1787\nf 2195/2111/1796 2162/2120/1805 2167/2119/1804 2194/2112/1797\nf 2196/2116/1801 2163/2137/1822 2162/2120/1805 2195/2111/1796\nf 2197/2114/1799 2165/2127/1812 2163/2137/1822 2196/2116/1801\nf 1594/1481/1167 1555/1495/1181 2165/2127/1812 2197/2114/1799\nf 2534/2140/1825 2368/2141/1826 2367/2142/1827 2202/2143/1828\nf 2378/2089/1774 2377/2144/1829 2198/2145/1830 2148/2090/1775\nf 2377/2144/1829 2376/2146/1831 2199/2147/1832 2198/2145/1830\nf 2199/2147/1832 2376/2146/1831 2375/2148/1833 2200/2149/1834\nf 2171/2078/1763 2203/2150/1835 2149/2086/1771 2140/2071/1756\nf 2127/2061/1746 2126/2058/1743 2117/2044/1729 2206/2151/1836\nf 2511/2077/1762 2510/2152/1837 2203/2150/1835 2171/2078/1763\nf 2139/2080/1765 2128/2055/1740 2205/2153/1838 2204/2154/1839\nf 2128/2055/1740 2638/2054/1739 2637/2155/1840 2205/2153/1838\nf 2152/2038/1723 2114/2036/1721 2137/2067/1752 2209/2156/1841\nf 2117/2044/1729 2116/2042/1727 2207/2157/1842 2206/2151/1836\nf 2116/2042/1727 2115/2041/1726 2208/2158/1843 2207/2157/1842\nf 2115/2041/1726 2599/2094/1779 2598/2159/1844 2208/2158/1843\nf 2636/2160/1845 2211/2161/1846 2205/2153/1838 2637/2155/1840\nf 2635/2162/1847 2213/2163/1848 2211/2161/1846 2636/2160/1845\nf 2211/2161/1846 2210/2164/1849 2204/2154/1839 2205/2153/1838\nf 2213/2163/1848 2212/2165/1850 2210/2164/1849 2211/2161/1846\nf 1524/1436/1122 2142/2075/1760 2214/2083/1768 1612/1514/1200\nf 1614/1545/1231 1616/1548/1234 2216/2166/1851 2215/2167/1852\nf 1616/1548/1234 1567/1499/1185 2175/2128/1813 2216/2166/1851\nf 2215/2167/1852 2216/2166/1851 2217/2168/1853 2221/2169/1854\nf 2216/2166/1851 2175/2128/1813 2176/2131/1816 2217/2168/1853\nf 2217/2168/1853 2176/2131/1816 2177/2130/1815 2218/2170/1855\nf 2219/2171/1856 2178/2129/1814 2179/2133/1818 2220/2172/1857\nf 2218/2170/1855 2177/2130/1815 2178/2129/1814 2219/2171/1856\nf 2224/2173/1858 2230/2174/1859 2229/2175/1860 2231/2176/1861\nf 2183/2136/1821 2234/2177/1862 2233/2178/1863 2222/2179/1864\nf 2223/2180/1865 2220/2172/1857 2179/2133/1818 2181/2135/1820\nf 2183/2136/1821 2222/2179/1864 2223/2180/1865 2181/2135/1820\nf 2233/2178/1863 2232/2181/1866 2225/2182/1867 2222/2179/1864\nf 2223/2180/1865 2226/2183/1868 2227/2184/1869 2220/2172/1857\nf 2220/2172/1857 2227/2184/1869 2228/2185/1870 2219/2171/1856\nf 2219/2171/1856 2228/2185/1870 2229/2175/1860 2218/2170/1855\nf 2218/2170/1855 2229/2175/1860 2230/2174/1859 2217/2168/1853\nf 2217/2168/1853 2230/2174/1859 2224/2173/1858 2221/2169/1854\nf 2229/2175/1860 2228/2185/1870 2227/2184/1869 2231/2176/1861\nf 2224/2173/1858 2231/2176/1861 2225/2182/1867 2232/2181/1866\nf 2227/2184/1869 2226/2183/1868 2225/2182/1867 2231/2176/1861\nf 2221/2169/1854 2224/2173/1858 2232/2181/1866 2233/2178/1863\nf 2234/2177/1862 2215/2167/1852 2221/2169/1854 2233/2178/1863\nf 1635/1567/1253 1614/1545/1231 2215/2167/1852 2234/2177/1862\nf 2611/2023/1708 2610/2186/1871 2249/2187/1872 2099/2024/1709\nf 2101/2027/1712 2252/2188/1873 2251/2189/1874 2100/2028/1713\nf 2102/2031/1716 2253/2190/1875 2252/2188/1873 2101/2027/1712\nf 2103/2033/1718 2254/2191/1876 2253/2190/1875 2102/2031/1716\nf 2104/2035/1720 2255/2192/1877 2254/2191/1876 2103/2033/1718\nf 2151/2037/1722 2256/2193/1878 2255/2192/1877 2104/2035/1720\nf 2106/2039/1724 2258/2194/1879 2257/2195/1880 2105/2040/1725\nf 2107/2043/1728 2247/2196/1881 2258/2194/1879 2106/2039/1724\nf 2108/2045/1730 2248/2197/1882 2247/2196/1881 2107/2043/1728\nf 2099/2024/1709 2249/2187/1872 2248/2197/1882 2108/2045/1730\nf 2105/2040/1725 2257/2195/1880 2601/2198/1883 2600/2093/1778\nf 2100/2028/1713 2251/2189/1874 2250/2199/1884 2153/2095/1780\nf 2248/2197/1882 2246/2200/1885 2245/2201/1886 2247/2196/1881\nf 2249/2187/1872 2235/2202/1887 2246/2200/1885 2248/2197/1882\nf 2610/2186/1871 2609/2203/1888 2235/2202/1887 2249/2187/1872\nf 2251/2189/1874 2237/2204/1889 2236/2205/1890 2250/2199/1884\nf 2252/2188/1873 2238/2206/1891 2237/2204/1889 2251/2189/1874\nf 2253/2190/1875 2239/2207/1892 2238/2206/1891 2252/2188/1873\nf 2254/2191/1876 2240/2208/1893 2239/2207/1892 2253/2190/1875\nf 2255/2192/1877 2241/2209/1894 2240/2208/1893 2254/2191/1876\nf 2256/2193/1878 2242/2210/1895 2241/2209/1894 2255/2192/1877\nf 2257/2195/1880 2243/2211/1896 2602/2212/1897 2601/2198/1883\nf 2258/2194/1879 2244/2213/1898 2243/2211/1896 2257/2195/1880\nf 2247/2196/1881 2245/2201/1886 2244/2213/1898 2258/2194/1879\nf 2238/2206/1891 2261/2214/1899 2260/2215/1900 2237/2204/1889\nf 2239/2207/1892 2262/2216/1901 2261/2214/1899 2238/2206/1891\nf 2240/2208/1893 2263/2217/1902 2262/2216/1901 2239/2207/1892\nf 2241/2209/1894 2264/2218/1903 2263/2217/1902 2240/2208/1893\nf 2242/2210/1895 2265/2219/1904 2264/2218/1903 2241/2209/1894\nf 2244/2213/1898 2267/2220/1905 2266/2221/1906 2243/2211/1896\nf 2245/2201/1886 2268/2222/1907 2267/2220/1905 2244/2213/1898\nf 2246/2200/1885 2269/2223/1908 2268/2222/1907 2245/2201/1886\nf 2235/2202/1887 2259/2224/1909 2269/2223/1908 2246/2200/1885\nf 2243/2211/1896 2266/2221/1906 2603/2225/1910 2602/2212/1897\nf 2261/2214/1899 2273/2226/1911 2272/2227/1912 2260/2215/1900\nf 2262/2216/1901 2274/2228/1913 2273/2226/1911 2261/2214/1899\nf 2263/2217/1902 2275/2229/1914 2274/2228/1913 2262/2216/1901\nf 2264/2218/1903 2276/2230/1915 2275/2229/1914 2263/2217/1902\nf 2265/2219/1904 2277/2231/1916 2276/2230/1915 2264/2218/1903\nf 2267/2220/1905 2279/2232/1917 2278/2233/1918 2266/2221/1906\nf 2268/2222/1907 2280/2234/1919 2279/2232/1917 2267/2220/1905\nf 2269/2223/1908 2281/2235/1920 2280/2234/1919 2268/2222/1907\nf 2259/2224/1909 2270/2236/1921 2281/2235/1920 2269/2223/1908\nf 2266/2221/1906 2278/2233/1918 2604/2237/1922 2603/2225/1910\nf 2273/2226/1911 2284/2238/1923 2271/2239/1924 2272/2227/1912\nf 2604/2237/1922 2278/2233/1918 2279/2232/1917 2605/2240/1925\nf 2274/2228/1913 2275/2229/1914 2283/2241/1926 2282/2242/1927\nf 2280/2234/1919 2281/2235/1920 2607/2243/1928 2606/2244/1929\nf 2605/2240/1925 2279/2232/1917 2280/2234/1919 2606/2244/1929\nf 2275/2229/1914 2276/2230/1915 2277/2231/1916 2283/2241/1926\nf 2273/2226/1911 2274/2228/1913 2282/2242/1927 2284/2238/1923\nf 2281/2235/1920 2270/2236/1921 2608/2245/1930 2607/2243/1928\nf 2133/2063/1748 2285/2246/1931 2286/2247/1932 2134/2064/1749\nf 2134/2064/1749 2286/2247/1932 2287/2248/1933 2135/2065/1750\nf 2135/2065/1750 2287/2248/1933 2288/2249/1934 2136/2066/1751\nf 2136/2066/1751 2288/2249/1934 2289/2250/1935 2137/2067/1752\nf 2138/2069/1754 2290/2251/1936 2285/2246/1931 2133/2063/1748\nf 1519/1428/1114 1692/1634/1320 2290/2251/1936 2138/2069/1754\nf 2598/2159/1844 2597/2252/1937 2291/2253/1938 2208/2158/1843\nf 2137/2067/1752 2289/2250/1935 2292/2254/1939 2209/2156/1841\nf 2634/2255/1940 2294/2256/1941 2213/2163/1848 2635/2162/1847\nf 2294/2256/1941 2293/2257/1942 2212/2165/1850 2213/2163/1848\nf 2578/2258/1943 2581/2259/1944 2580/2260/1945 2579/2261/1946\nf 2303/2262/1947 2199/2147/1832 2200/2149/1834 2579/2261/1946\nf 2314/2263/1948 2650/2264/1949 2649/2265/1950 2297/2266/1951\nf 2312/2267/1952 1260/2268/1953 1263/2269/1954 2302/2270/1955\nf 2313/2271/1956 2312/2267/1952 2302/2270/1955 2298/2272/1957\nf 2297/2266/1951 2649/2265/1950 2648/2273/1958 2303/2262/1947\nf 2519/2274/1959 2319/2275/1960 2320/2276/1961 2520/2277/1962\nf 2198/2145/1830 2199/2147/1832 2303/2262/1947 2304/2278/1963\nf 2648/2273/1958 2647/2279/1964 2304/2278/1963 2303/2262/1947\nf 2198/2145/1830 2304/2278/1963 2307/2280/1965 2148/2090/1775\nf 2647/2279/1964 2646/2281/1966 2307/2280/1965 2304/2278/1963\nf 2305/2282/1967 1705/1666/1352 1532/1518/1204 2189/2092/1777\nf 2644/2283/1968 2079/1668/1354 1705/1666/1352 2305/2282/1967\nf 2306/2284/1969 2305/2282/1967 2189/2092/1777 2147/2087/1772\nf 2645/2285/1970 2644/2283/1968 2305/2282/1967 2306/2284/1969\nf 2148/2090/1775 2307/2280/1965 2306/2284/1969 2147/2087/1772\nf 2646/2281/1966 2645/2285/1970 2306/2284/1969 2307/2280/1965\nf 2321/2286/1971 2322/2287/1972 2522/2288/1973 2521/2289/1974\nf 2298/2272/1957 2302/2270/1955 2309/2290/1975 2308/2291/1976\nf 2302/2270/1955 1263/2269/1954 1262/2292/1977 2309/2290/1975\nf 2320/2276/1961 2321/2286/1971 2521/2289/1974 2520/2277/1962\nf 2518/2293/1978 2318/2294/1979 2319/2275/1960 2519/2274/1959\nf 2301/2295/1980 1265/2296/1981 1260/2268/1953 2312/2267/1952\nf 2299/2297/1982 2301/2295/1980 2312/2267/1952 2313/2271/1956\nf 2300/2298/1983 2651/2299/1984 2650/2264/1949 2314/2263/1948\nf 2314/2263/1948 2315/2300/1985 2295/2301/1986 2300/2298/1983\nf 2316/2302/1987 2296/2303/1988 2295/2301/1986 2315/2300/1985\nf 2517/2304/1989 2317/2305/1990 2318/2294/1979 2518/2293/1978\nf 1721/1691/1377 2317/2305/1990 2517/2304/1989 1946/1692/1378\nf 2323/2306/1991 2523/2307/1992 2522/2288/1973 2322/2287/1972\nf 2524/2308/1993 2523/2307/1992 2323/2306/1991 2324/2309/1994\nf 2527/2310/1995 2311/2311/1996 1706/1699/1385 1958/1698/1384\nf 2311/2311/1996 2327/2312/1997 2328/2313/1998 2310/2314/1999\nf 2329/2315/2000 2308/2291/1976 2310/2314/1999 2328/2313/1998\nf 2330/2316/2001 2298/2272/1957 2308/2291/1976 2329/2315/2000\nf 2331/2317/2002 2313/2271/1956 2298/2272/1957 2330/2316/2001\nf 2332/2318/2003 2299/2297/1982 2313/2271/1956 2331/2317/2002\nf 2597/2252/1937 2596/2319/2004 2357/2320/2005 2291/2253/1938\nf 2289/2250/1935 2334/2321/2006 2358/2322/2007 2292/2254/1939\nf 2336/2323/2008 2356/2324/2009 2335/2325/2010 2365/2326/2011\nf 2634/2255/1940 2633/2327/2012 2336/2323/2008 2294/2256/1941\nf 2288/2249/1934 2337/2328/2013 2334/2321/2006 2289/2250/1935\nf 1692/1634/1320 1747/1719/1405 2342/2329/2014 2290/2251/1936\nf 2339/2330/2015 2337/2328/2013 2288/2249/1934 2287/2248/1933\nf 2340/2331/2016 2339/2330/2015 2287/2248/1933 2286/2247/1932\nf 2341/2332/2017 2340/2331/2016 2286/2247/1932 2285/2246/1931\nf 2342/2329/2014 2341/2332/2017 2285/2246/1931 2290/2251/1936\nf 2337/2328/2013 2360/2333/2018 2359/2334/2019 2334/2321/2006\nf 2339/2330/2015 2361/2335/2020 2360/2333/2018 2337/2328/2013\nf 2340/2331/2016 2362/2336/2021 2361/2335/2020 2339/2330/2015\nf 2341/2332/2017 2363/2337/2022 2362/2336/2021 2340/2331/2016\nf 2342/2329/2014 2364/2338/2023 2363/2337/2022 2341/2332/2017\nf 1747/1719/1405 1773/1729/1415 2364/2338/2023 2342/2329/2014\nf 2593/2339/2024 2592/2340/2025 2373/2341/2026 2506/2342/2027\nf 2632/2343/2028 2631/2344/2029 2370/2345/2030 2356/2324/2009\nf 2595/2346/2031 2594/2347/2032 2372/2348/2033 2371/2349/2034\nf 2592/2340/2025 2591/2350/2035 2516/2351/2036 2373/2341/2026\nf 2504/2352/2037 2344/2353/2038 2343/2354/2039 2505/2355/2040\nf 2503/2356/2041 2345/2357/2042 2344/2353/2038 2504/2352/2037\nf 2502/2358/2043 2346/2359/2044 2345/2357/2042 2503/2356/2041\nf 2501/2360/2045 2347/2361/2046 2346/2359/2044 2502/2358/2043\nf 2500/2362/2047 2348/2363/2048 2347/2361/2046 2501/2360/2045\nf 2499/2364/2049 2349/2365/2050 2348/2363/2048 2500/2362/2047\nf 1927/2366/1443 1757/2367/1444 2349/2365/2050 2499/2364/2049\nf 2334/2321/2006 2359/2334/2019 2333/2368/2051 2358/2322/2007\nf 2294/2256/1941 2336/2323/2008 2365/2326/2011 2293/2257/1942\nf 2507/2369/2052 2367/2142/1827 2368/2141/1826 2508/2370/2053\nf 2508/2370/2053 2368/2141/1826 2369/2371/2054 2509/2372/2055\nf 2509/2372/2055 2369/2371/2054 2203/2150/1835 2510/2152/1837\nf 2533/2373/2056 2369/2371/2054 2368/2141/1826 2534/2140/1825\nf 2203/2150/1835 2369/2371/2054 2533/2373/2056 2532/2374/2057\nf 2149/2086/1771 2203/2150/1835 2532/2374/2057 2531/2375/2058\nf 2530/2376/2059 2150/2084/1769 2149/2086/1771 2531/2375/2058\nf 2188/2085/1770 2150/2084/1769 2530/2376/2059 2529/2377/2060\nf 1536/1516/1202 2188/2085/1770 2529/2377/2060 1961/1769/1455\nf 2200/2149/1834 2375/2148/1833 2374/2378/2061 2201/2379/2062\nf 2382/2380/2063 2383/2381/2064 1266/2382/2065 1470/2383/2066\nf 2332/2318/2003 2386/2384/2067 2384/2385/2068 2299/2297/1982\nf 2526/2386/2069 2385/2387/2070 1272/2388/2071 1267/2389/2072\nf 2324/2309/1994 2387/2390/2073 2525/2391/2074 2524/2308/1993\nf 2384/2385/2068 2386/2384/2067 2383/2381/2064 2382/2380/2063\nf 2526/2386/2069 2525/2391/2074 2387/2390/2073 2385/2387/2070\nf 2350/2392/2075 2584/2393/2076 2583/2394/2077 2338/2395/2078\nf 2355/2396/2079 2589/2397/2080 2588/2398/2081 2352/2399/2082\nf 2381/2400/2083 2585/2401/2084 2584/2393/2076 2350/2392/2075\nf 2353/2402/2085 2587/2403/2086 2586/2404/2087 2354/2405/2088\nf 2352/2399/2082 2588/2398/2081 2587/2403/2086 2353/2402/2085\nf 2351/2406/2089 2590/2407/2090 2589/2397/2080 2355/2396/2079\nf 2338/2395/2078 2583/2394/2077 2582/2408/2091 2366/2409/2092\nf 2354/2405/2088 2586/2404/2087 2585/2401/2084 2381/2400/2083\nf 2582/2408/2091 2581/2259/1944 2578/2258/1943 2366/2409/2092\nf 2344/2353/2038 2398/2410/2093 2397/2411/2094 2343/2354/2039\nf 2345/2357/2042 2399/2412/2095 2398/2410/2093 2344/2353/2038\nf 2346/2359/2044 2400/2413/2096 2399/2412/2095 2345/2357/2042\nf 2347/2361/2046 2401/2414/2097 2400/2413/2096 2346/2359/2044\nf 2348/2363/2048 2402/2415/2098 2401/2414/2097 2347/2361/2046\nf 2349/2365/2050 2403/2416/2099 2402/2415/2098 2348/2363/2048\nf 1757/2367/1444 1814/2417/1495 2403/2416/2099 2349/2365/2050\nf 2461/2418/2100 2462/2419/2101 1883/2420/1498 1815/2421/1497\nf 2432/2422/2102 2433/2423/2103 1850/2424/1502 1816/2425/1501\nf 2416/2426/2104 2417/2427/2105 2418/2428/2106 2404/2429/2107\nf 2408/2430/2108 2409/2431/2109 2410/2432/2110 2405/2433/2111\nf 2395/2434/2112 2407/2435/2113 2406/2436/2114 2391/2437/2115\nf 2397/2411/2094 2398/2410/2093 2407/2435/2113 2395/2434/2112\nf 2406/2436/2114 2407/2435/2113 2409/2431/2109 2408/2430/2108\nf 2409/2431/2109 2407/2435/2113 2398/2410/2093 2399/2412/2095\nf 2410/2432/2110 2409/2431/2109 2399/2412/2095 2400/2413/2096\nf 2394/2438/2116 2413/2439/2117 2411/2440/2118 2393/2441/2119\nf 2391/2437/2115 2406/2436/2114 2412/2442/2120 2390/2443/2121\nf 2390/2443/2121 2412/2442/2120 2413/2439/2117 2394/2438/2116\nf 2414/2444/2122 2415/2445/2123 2408/2430/2108 2405/2433/2111\nf 2408/2430/2108 2415/2445/2123 2412/2442/2120 2406/2436/2114\nf 2411/2440/2118 2413/2439/2117 2417/2427/2105 2416/2426/2104\nf 2417/2427/2105 2413/2439/2117 2412/2442/2120 2415/2445/2123\nf 2418/2428/2106 2417/2427/2105 2415/2445/2123 2414/2444/2122\nf 1832/2446/1524 2423/2447/2124 2424/2448/2125 1839/2449/1525\nf 2421/2450/2126 2422/2451/2127 2419/2452/2128 2420/2453/2129\nf 2410/2432/2110 2421/2450/2126 2420/2453/2129 2405/2433/2111\nf 2401/2414/2097 2421/2450/2126 2410/2432/2110 2400/2413/2096\nf 2402/2415/2098 2422/2451/2127 2421/2450/2126 2401/2414/2097\nf 2422/2451/2127 2424/2448/2125 2423/2447/2124 2419/2452/2128\nf 2403/2416/2099 2424/2448/2125 2422/2451/2127 2402/2415/2098\nf 1839/2449/1525 2424/2448/2125 2403/2416/2099 1814/2417/1495\nf 2428/2454/2130 2429/2455/2131 2430/2456/2132 2425/2457/2133\nf 2426/2458/2134 2427/2459/2135 2420/2453/2129 2419/2452/2128\nf 2420/2453/2129 2427/2459/2135 2414/2444/2122 2405/2433/2111\nf 2404/2429/2107 2418/2428/2106 2429/2455/2131 2428/2454/2130\nf 2429/2455/2131 2418/2428/2106 2414/2444/2122 2427/2459/2135\nf 2430/2456/2132 2429/2455/2131 2427/2459/2135 2426/2458/2134\nf 1846/2460/1538 2431/2461/2136 2423/2447/2124 1832/2446/1524\nf 2423/2447/2124 2431/2461/2136 2426/2458/2134 2419/2452/2128\nf 2425/2457/2133 2430/2456/2132 2433/2423/2103 2432/2422/2102\nf 2433/2423/2103 2430/2456/2132 2426/2458/2134 2431/2461/2136\nf 1850/2424/1502 2433/2423/2103 2431/2461/2136 1846/2460/1538\nf 2445/2462/2137 2446/2463/2138 2447/2464/2139 2434/2465/2140\nf 2438/2466/2141 2439/2467/2142 2440/2468/2143 2435/2469/2144\nf 2392/2470/2145 2437/2471/2146 2436/2472/2147 2389/2473/2148\nf 2393/2441/2119 2411/2440/2118 2437/2471/2146 2392/2470/2145\nf 2436/2472/2147 2437/2471/2146 2439/2467/2142 2438/2466/2141\nf 2439/2467/2142 2437/2471/2146 2411/2440/2118 2416/2426/2104\nf 2440/2468/2143 2439/2467/2142 2416/2426/2104 2404/2429/2107\nf 2396/2474/2149 2442/2475/2150 2296/2303/1988 2316/2302/1987\nf 2389/2473/2148 2436/2472/2147 2441/2476/2151 2388/2477/2152\nf 2388/2477/2152 2441/2476/2151 2442/2475/2150 2396/2474/2149\nf 2443/2478/2153 2444/2479/2154 2438/2466/2141 2435/2469/2144\nf 2438/2466/2141 2444/2479/2154 2441/2476/2151 2436/2472/2147\nf 2296/2303/1988 2442/2475/2150 2446/2463/2138 2445/2462/2137\nf 2446/2463/2138 2442/2475/2150 2441/2476/2151 2444/2479/2154\nf 2447/2464/2139 2446/2463/2138 2444/2479/2154 2443/2478/2153\nf 1865/2480/1558 2452/2481/2155 2453/2482/2156 1872/2483/1559\nf 2450/2484/2157 2451/2485/2158 2448/2486/2159 2449/2487/2160\nf 2440/2468/2143 2450/2484/2157 2449/2487/2160 2435/2469/2144\nf 2428/2454/2130 2450/2484/2157 2440/2468/2143 2404/2429/2107\nf 2425/2457/2133 2451/2485/2158 2450/2484/2157 2428/2454/2130\nf 2451/2485/2158 2453/2482/2156 2452/2481/2155 2448/2486/2159\nf 2432/2422/2102 2453/2482/2156 2451/2485/2158 2425/2457/2133\nf 1872/2483/1559 2453/2482/2156 2432/2422/2102 1816/2425/1501\nf 2457/2488/2161 2458/2489/2162 2459/2490/2163 2454/2491/2164\nf 2455/2492/2165 2456/2493/2166 2449/2487/2160 2448/2486/2159\nf 2449/2487/2160 2456/2493/2166 2443/2478/2153 2435/2469/2144\nf 2434/2465/2140 2447/2464/2139 2458/2489/2162 2457/2488/2161\nf 2458/2489/2162 2447/2464/2139 2443/2478/2153 2456/2493/2166\nf 2459/2490/2163 2458/2489/2162 2456/2493/2166 2455/2492/2165\nf 1879/2494/1572 2460/2495/2167 2452/2481/2155 1865/2480/1558\nf 2452/2481/2155 2460/2495/2167 2455/2492/2165 2448/2486/2159\nf 2454/2491/2164 2459/2490/2163 2462/2419/2101 2461/2418/2100\nf 2462/2419/2101 2459/2490/2163 2455/2492/2165 2460/2495/2167\nf 1883/2420/1498 2462/2419/2101 2460/2495/2167 1879/2494/1572\nf 1262/2292/1977 1261/2496/2168 2463/2497/2169 2309/2290/1975\nf 2463/2497/2169 2310/2314/1999 2308/2291/1976 2309/2290/1975\nf 2464/2498/2170 2311/2311/1996 2310/2314/1999 2463/2497/2169\nf 1261/2496/2168 1264/2499/2171 2464/2498/2170 2463/2497/2169\nf 2464/2498/2170 1884/1892/1578 1706/1699/1385 2311/2311/1996\nf 1884/1892/1578 2464/2498/2170 1264/2499/2171 1044/1893/1579\nf 2382/2380/2063 1470/2383/2066 1265/2296/1981 2301/2295/1980\nf 2382/2380/2063 2301/2295/1980 2299/2297/1982 2384/2385/2068\nf 2300/2298/1983 2642/2500/2172 2473/2501/2173 2651/2299/1984\nf 2465/2502/2174 1273/2503/2175 1268/2504/2176 2477/2505/2177\nf 1271/2506/2178 1272/2388/2071 2385/2387/2070 2470/2507/2179\nf 1269/2508/2180 1270/2509/2181 2643/2510/2182 2469/2511/2183\nf 2471/2512/2184 2465/2502/2174 2477/2505/2177 2476/2513/2185\nf 2472/2514/2186 2469/2511/2183 2643/2510/2182 2642/2500/2172\nf 2473/2501/2173 2470/2507/2179 2385/2387/2070 2387/2390/2073\nf 2467/2515/2187 2466/2516/2188 2471/2512/2184 2476/2513/2185\nf 2300/2298/1983 2468/2517/2189 2472/2514/2186 2642/2500/2172\nf 2300/2298/1983 2295/2301/1986 2474/2518/2190 2468/2517/2189\nf 2468/2517/2189 2474/2518/2190 2475/2519/2191 2467/2515/2187\nf 2445/2462/2137 2474/2518/2190 2295/2301/1986 2296/2303/1988\nf 2434/2465/2140 2475/2519/2191 2474/2518/2190 2445/2462/2137\nf 2468/2517/2189 2467/2515/2187 2476/2513/2185 2472/2514/2186\nf 2477/2505/2177 2469/2511/2183 2472/2514/2186 2476/2513/2185\nf 1268/2504/2176 1269/2508/2180 2469/2511/2183 2477/2505/2177\nf 1815/2421/1497 1901/2520/1601 2478/2521/2192 2461/2418/2100\nf 2454/2491/2164 2480/2522/2193 2479/2523/2194 2457/2488/2161\nf 2457/2488/2161 2479/2523/2194 2475/2519/2191 2434/2465/2140\nf 2461/2418/2100 2478/2521/2192 2480/2522/2193 2454/2491/2164\nf 2478/2521/2192 1901/2520/1601 1905/2524/1605 2481/2525/2195\nf 2479/2523/2194 2480/2522/2193 2483/2526/2196 2482/2527/2197\nf 2467/2515/2187 2475/2519/2191 2479/2523/2194 2482/2527/2197\nf 2483/2526/2196 2480/2522/2193 2478/2521/2192 2481/2525/2195\nf 1905/2524/1605 1909/2528/1609 2484/2529/2198 2481/2525/2195\nf 2483/2526/2196 2486/2530/2199 2485/2531/2200 2482/2527/2197\nf 2482/2527/2197 2485/2531/2200 2466/2516/2188 2467/2515/2187\nf 2481/2525/2195 2484/2529/2198 2486/2530/2199 2483/2526/2196\nf 2487/2532/2201 1912/2533/1615 1255/2534/1614 1471/2535/2202\nf 2488/2536/2203 2487/2532/2201 1471/2535/2202 1472/2537/2204\nf 2492/2538/2205 2488/2536/2203 1472/2537/2204 1473/2539/2206\nf 2498/2540/2207 2484/2529/2198 1909/2528/1609 1926/2541/1621\nf 2498/2540/2207 2497/2542/2208 2486/2530/2199 2484/2529/2198\nf 2487/2532/2201 2488/2536/2203 2490/2543/2209 2489/2544/2210\nf 2487/2532/2201 2489/2544/2210 1916/2545/1625 1912/2533/1615\nf 2497/2542/2208 2496/2546/2211 2485/2531/2200 2486/2530/2199\nf 2488/2536/2203 2492/2538/2205 2491/2547/2212 2490/2543/2209\nf 2496/2546/2211 2495/2548/2213 2466/2516/2188 2485/2531/2200\nf 2492/2538/2205 2494/2549/2214 2493/2550/2215 2491/2547/2212\nf 1474/2551/2216 2494/2549/2214 2492/2538/2205 1473/2539/2206\nf 2493/2550/2215 2471/2512/2184 2466/2516/2188 2495/2548/2213\nf 2494/2549/2214 2465/2502/2174 2471/2512/2184 2493/2550/2215\nf 1273/2503/2175 2465/2502/2174 2494/2549/2214 1474/2551/2216\nf 2491/2547/2212 2493/2550/2215 2495/2548/2213 2496/2546/2211\nf 2490/2543/2209 2491/2547/2212 2496/2546/2211 2497/2542/2208\nf 2489/2544/2210 2490/2543/2209 2497/2542/2208 2498/2540/2207\nf 2489/2544/2210 2498/2540/2207 1926/2541/1621 1916/2545/1625\nf 1773/1729/1415 1927/2366/1443 2499/2364/2049 2364/2338/2023\nf 2364/2338/2023 2499/2364/2049 2500/2362/2047 2363/2337/2022\nf 2363/2337/2022 2500/2362/2047 2501/2360/2045 2362/2336/2021\nf 2362/2336/2021 2501/2360/2045 2502/2358/2043 2361/2335/2020\nf 2361/2335/2020 2502/2358/2043 2503/2356/2041 2360/2333/2018\nf 2360/2333/2018 2503/2356/2041 2504/2352/2037 2359/2334/2019\nf 2359/2334/2019 2504/2352/2037 2505/2355/2040 2333/2368/2051\nf 2594/2347/2032 2593/2339/2024 2506/2342/2027 2372/2348/2033\nf 2293/2257/1942 2507/2369/2052 2508/2370/2053 2212/2165/1850\nf 2212/2165/1850 2508/2370/2053 2509/2372/2055 2210/2164/1849\nf 2210/2164/1849 2509/2372/2055 2510/2152/1837 2204/2154/1839\nf 2139/2080/1765 2204/2154/1839 2510/2152/1837 2511/2077/1762\nf 2146/2081/1766 2139/2080/1765 2511/2077/1762 2512/2076/1761\nf 2167/2119/1804 2146/2081/1766 2512/2076/1761 2513/2117/1802\nf 2194/2112/1797 2167/2119/1804 2513/2117/1802 2514/2101/1786\nf 2156/2109/1794 2194/2112/1797 2514/2101/1786 2515/2100/1785\nf 2166/2113/1798 2657/2552/2217 2093/1946/1632 1556/1482/1168\nf 2164/2115/1800 2658/2553/2218 2657/2552/2217 2166/2113/1798\nf 2174/2110/1795 2655/2554/2219 2658/2553/2218 2164/2115/1800\nf 1546/1464/1150 2098/1951/1637 2660/2555/2220 2158/2098/1783\nf 2158/2098/1783 2660/2555/2220 2659/2556/2221 2157/2107/1792\nf 2654/2557/2222 2652/2558/2223 2515/2100/1785 2168/2103/1788\nf 2591/2350/2035 2590/2407/2090 2351/2406/2089 2516/2351/2036\nf 1946/1692/1378 2517/2304/1989 2325/2559/2224 1730/1955/1641\nf 2325/2559/2224 2517/2304/1989 2518/2293/1978 2326/2560/2225\nf 2326/2560/2225 2518/2293/1978 2519/2274/1959 2327/2312/1997\nf 2327/2312/1997 2519/2274/1959 2520/2277/1962 2328/2313/1998\nf 2521/2289/1974 2329/2315/2000 2328/2313/1998 2520/2277/1962\nf 2522/2288/1973 2330/2316/2001 2329/2315/2000 2521/2289/1974\nf 2523/2307/1992 2331/2317/2002 2330/2316/2001 2522/2288/1973\nf 2332/2318/2003 2331/2317/2002 2523/2307/1992 2524/2308/1993\nf 2525/2391/2074 2386/2384/2067 2332/2318/2003 2524/2308/1993\nf 2383/2381/2064 2386/2384/2067 2525/2391/2074 2526/2386/2069\nf 2383/2381/2064 2526/2386/2069 1267/2389/2072 1266/2382/2065\nf 2527/2310/1995 2326/2560/2225 2327/2312/1997 2311/2311/1996\nf 2325/2559/2224 2326/2560/2225 2527/2310/1995 2528/2561/2226\nf 2325/2559/2224 2528/2561/2226 1959/1959/1645 1730/1955/1641\nf 2527/2310/1995 1958/1698/1384 1959/1959/1645 2528/2561/2226\nf 1961/1769/1455 2529/2377/2060 2380/2091/1776 1790/1517/1203\nf 2530/2376/2059 2379/2088/1773 2380/2091/1776 2529/2377/2060\nf 2379/2088/1773 2530/2376/2059 2531/2375/2058 2378/2089/1774\nf 2532/2374/2057 2377/2144/1829 2378/2089/1774 2531/2375/2058\nf 2533/2373/2056 2376/2146/1831 2377/2144/1829 2532/2374/2057\nf 2376/2146/1831 2533/2373/2056 2534/2140/1825 2375/2148/1833\nf 2375/2148/1833 2534/2140/1825 2202/2143/1828 2374/2378/2061\nf 2630/2562/2227 2629/2563/2228 2535/2564/2229 2550/2565/2230\nf 2540/2566/2231 2539/2567/2232 2538/2568/2233 2537/2569/2234\nf 2541/2570/2235 2540/2566/2231 2537/2569/2234 2542/2571/2236\nf 2549/2572/2237 2541/2570/2235 2542/2571/2236 2536/2573/2238\nf 2539/2567/2232 2548/2574/2239 2543/2575/2240 2538/2568/2233\nf 2548/2574/2239 2547/2576/2241 2544/2577/2242 2543/2575/2240\nf 2547/2576/2241 2546/2578/2243 2545/2579/2244 2544/2577/2242\nf 2631/2344/2029 2630/2562/2227 2550/2565/2230 2370/2345/2030\nf 2506/2342/2027 2373/2341/2026 2555/2580/2245 2540/2566/2231\nf 2541/2570/2235 2372/2348/2033 2506/2342/2027 2540/2566/2231\nf 2547/2576/2241 2553/2581/2246 2552/2582/2247 2546/2578/2243\nf 2548/2574/2239 2554/2583/2248 2553/2581/2246 2547/2576/2241\nf 2539/2567/2232 2551/2584/2249 2554/2583/2248 2548/2574/2239\nf 2549/2572/2237 2371/2349/2034 2372/2348/2033 2541/2570/2235\nf 2540/2566/2231 2555/2580/2245 2551/2584/2249 2539/2567/2232\nf 2516/2351/2036 2551/2584/2249 2555/2580/2245 2373/2341/2026\nf 2351/2406/2089 2554/2583/2248 2551/2584/2249 2516/2351/2036\nf 2355/2396/2079 2553/2581/2246 2554/2583/2248 2351/2406/2089\nf 2352/2399/2082 2552/2582/2247 2553/2581/2246 2355/2396/2079\nf 2546/2578/2243 2563/2585/2250 2556/2586/2251 2545/2579/2244\nf 2563/2585/2250 2562/2587/2252 2557/2588/2253 2556/2586/2251\nf 2562/2587/2252 2561/2589/2254 2558/2590/2255 2557/2588/2253\nf 2561/2589/2254 2560/2591/2256 2559/2592/2257 2558/2590/2255\nf 2561/2589/2254 2565/2593/2258 2564/2594/2259 2560/2591/2256\nf 2562/2587/2252 2566/2595/2260 2565/2593/2258 2561/2589/2254\nf 2563/2585/2250 2567/2596/2261 2566/2595/2260 2562/2587/2252\nf 2546/2578/2243 2552/2582/2247 2567/2596/2261 2563/2585/2250\nf 2566/2595/2260 2567/2596/2261 2353/2402/2085 2354/2405/2088\nf 2567/2596/2261 2552/2582/2247 2352/2399/2082 2353/2402/2085\nf 2350/2392/2075 2564/2594/2259 2565/2593/2258 2381/2400/2083\nf 2565/2593/2258 2566/2595/2260 2354/2405/2088 2381/2400/2083\nf 2560/2591/2256 2571/2597/2262 2568/2598/2263 2559/2592/2257\nf 2570/2599/2264 2374/2378/2061 2202/2143/1828 2569/2600/2265\nf 2571/2597/2262 2570/2599/2264 2569/2600/2265 2568/2598/2263\nf 2350/2392/2075 2338/2395/2078 2572/2601/2266 2564/2594/2259\nf 2570/2599/2264 2571/2597/2262 2572/2601/2266 2573/2602/2267\nf 2338/2395/2078 2366/2409/2092 2573/2602/2267 2572/2601/2266\nf 2201/2379/2062 2374/2378/2061 2570/2599/2264 2573/2602/2267\nf 2571/2597/2262 2560/2591/2256 2564/2594/2259 2572/2601/2266\nf 2574/2603/2268 2507/2369/2052 2293/2257/1942 2365/2326/2011\nf 2335/2325/2010 2575/2604/2269 2574/2603/2268 2365/2326/2011\nf 2575/2604/2269 2577/2605/2270 2576/2606/2271 2574/2603/2268\nf 2576/2606/2271 2367/2142/1827 2507/2369/2052 2574/2603/2268\nf 2569/2600/2265 2202/2143/1828 2367/2142/1827 2576/2606/2271\nf 2577/2605/2270 2568/2598/2263 2569/2600/2265 2576/2606/2271\nf 2366/2409/2092 2578/2258/1943 2201/2379/2062 2573/2602/2267\nf 2201/2379/2062 2578/2258/1943 2579/2261/1946 2200/2149/1834\nf 2579/2261/1946 2580/2260/1945 2297/2266/1951 2303/2262/1947\nf 2581/2259/1944 2316/2302/1987 2315/2300/1985 2580/2260/1945\nf 2396/2474/2149 2316/2302/1987 2581/2259/1944 2582/2408/2091\nf 2583/2394/2077 2388/2477/2152 2396/2474/2149 2582/2408/2091\nf 2584/2393/2076 2389/2473/2148 2388/2477/2152 2583/2394/2077\nf 2585/2401/2084 2392/2470/2145 2389/2473/2148 2584/2393/2076\nf 2586/2404/2087 2393/2441/2119 2392/2470/2145 2585/2401/2084\nf 2587/2403/2086 2394/2438/2116 2393/2441/2119 2586/2404/2087\nf 2588/2398/2081 2390/2443/2121 2394/2438/2116 2587/2403/2086\nf 2589/2397/2080 2391/2437/2115 2390/2443/2121 2588/2398/2081\nf 2590/2407/2090 2395/2434/2112 2391/2437/2115 2589/2397/2080\nf 2397/2411/2094 2395/2434/2112 2590/2407/2090 2591/2350/2035\nf 2343/2354/2039 2397/2411/2094 2591/2350/2035 2592/2340/2025\nf 2505/2355/2040 2343/2354/2039 2592/2340/2025 2593/2339/2024\nf 2333/2368/2051 2505/2355/2040 2593/2339/2024 2594/2347/2032\nf 2596/2319/2004 2358/2322/2007 2333/2368/2051 2594/2347/2032\nf 2356/2324/2009 2336/2323/2008 2633/2327/2012 2632/2343/2028\nf 2580/2260/1945 2315/2300/1985 2314/2263/1948 2297/2266/1951\nf 2292/2254/1939 2358/2322/2007 2596/2319/2004 2597/2252/1937\nf 2209/2156/1841 2292/2254/1939 2597/2252/1937 2598/2159/1844\nf 2599/2094/1779 2152/2038/1723 2209/2156/1841 2598/2159/1844\nf 2600/2093/1778 2151/2037/1722 2152/2038/1723 2599/2094/1779\nf 2601/2198/1883 2256/2193/1878 2151/2037/1722 2600/2093/1778\nf 2602/2212/1897 2242/2210/1895 2256/2193/1878 2601/2198/1883\nf 2603/2225/1910 2265/2219/1904 2242/2210/1895 2602/2212/1897\nf 2604/2237/1922 2277/2231/1916 2265/2219/1904 2603/2225/1910\nf 2277/2231/1916 2604/2237/1922 2605/2240/1925 2283/2241/1926\nf 2283/2241/1926 2605/2240/1925 2606/2244/1929 2282/2242/1927\nf 2607/2243/1928 2284/2238/1923 2282/2242/1927 2606/2244/1929\nf 2608/2245/1930 2271/2239/1924 2284/2238/1923 2607/2243/1928\nf 2357/2320/2005 2596/2319/2004 2594/2347/2032 2595/2346/2031\nf 2250/2199/1884 2236/2205/1890 2609/2203/1888 2610/2186/1871\nf 2153/2095/1780 2250/2199/1884 2610/2186/1871 2611/2023/1708\nf 2153/2095/1780 2611/2023/1708 2612/2026/1711 2154/2096/1781\nf 2154/2096/1781 2612/2026/1711 2613/2048/1733 2155/2097/1782\nf 2155/2097/1782 2613/2048/1733 2047/1403/1089 1542/1460/1146\nf 2260/2215/1900 2272/2227/1912 2271/2239/1924 2614/2607/2272\nf 2236/2205/1890 2237/2204/1889 2260/2215/1900 2614/2607/2272\nf 2609/2203/1888 2236/2205/1890 2614/2607/2272 2615/2608/2273\nf 2271/2239/1924 2608/2245/1930 2615/2608/2273 2614/2607/2272\nf 2235/2202/1887 2609/2203/1888 2615/2608/2273 2259/2224/1909\nf 2608/2245/1930 2270/2236/1921 2259/2224/1909 2615/2608/2273\nf 2370/2345/2030 2550/2565/2230 2621/2609/2274 2620/2610/2275\nf 2577/2605/2270 2619/2611/2276 2559/2592/2257 2568/2598/2263\nf 2619/2611/2276 2618/2612/2277 2558/2590/2255 2559/2592/2257\nf 2618/2612/2277 2617/2613/2278 2557/2588/2253 2558/2590/2255\nf 2617/2613/2278 2616/2614/2279 2556/2586/2251 2557/2588/2253\nf 2622/2615/2280 2535/2564/2229 2623/2616/2281 2624/2617/2282\nf 2622/2615/2280 2621/2609/2274 2550/2565/2230 2535/2564/2229\nf 2335/2325/2010 2356/2324/2009 2370/2345/2030 2620/2610/2275\nf 2335/2325/2010 2620/2610/2275 2577/2605/2270 2575/2604/2269\nf 2621/2609/2274 2619/2611/2276 2577/2605/2270 2620/2610/2275\nf 2618/2612/2277 2619/2611/2276 2621/2609/2274 2622/2615/2280\nf 2617/2613/2278 2624/2617/2282 2623/2616/2281 2616/2614/2279\nf 2617/2613/2278 2618/2612/2277 2622/2615/2280 2624/2617/2282\nf 2537/2569/2234 2625/2618/2283 2536/2573/2238 2542/2571/2236\nf 2628/2619/2284 2623/2616/2281 2535/2564/2229 2629/2563/2228\nf 2538/2568/2233 2626/2620/2285 2625/2618/2283 2537/2569/2234\nf 2627/2621/2286 2616/2614/2279 2623/2616/2281 2628/2619/2284\nf 2544/2577/2242 2626/2620/2285 2538/2568/2233 2543/2575/2240\nf 2627/2621/2286 2626/2620/2285 2544/2577/2242 2545/2579/2244\nf 2626/2620/2285 2627/2621/2286 2628/2619/2284 2625/2618/2283\nf 2625/2618/2283 2628/2619/2284 2629/2563/2228 2536/2573/2238\nf 2549/2572/2237 2536/2573/2238 2629/2563/2228 2630/2562/2227\nf 2371/2349/2034 2549/2572/2237 2630/2562/2227 2631/2344/2029\nf 2595/2346/2031 2371/2349/2034 2631/2344/2029 2632/2343/2028\nf 2633/2327/2012 2357/2320/2005 2595/2346/2031 2632/2343/2028\nf 2291/2253/1938 2357/2320/2005 2633/2327/2012 2634/2255/1940\nf 2291/2253/1938 2634/2255/1940 2635/2162/1847 2208/2158/1843\nf 2208/2158/1843 2635/2162/1847 2636/2160/1845 2207/2157/1842\nf 2207/2157/1842 2636/2160/1845 2637/2155/1840 2206/2151/1836\nf 2638/2054/1739 2127/2061/1746 2206/2151/1836 2637/2155/1840\nf 2130/2062/1747 2127/2061/1746 2638/2054/1739 2639/2053/1738\nf 2185/2138/1823 2130/2062/1747 2639/2053/1738 2640/2123/1808\nf 2185/2138/1823 2640/2123/1808 2641/2126/1811 2186/2139/1824\nf 2186/2139/1824 2641/2126/1811 2076/1509/1195 1581/1513/1199\nf 2556/2586/2251 2616/2614/2279 2627/2621/2286 2545/2579/2244\nf 1577/1508/1194 1635/1567/1253 2234/2177/1862 2183/2136/1821\nf 2222/2179/1864 2225/2182/1867 2226/2183/1868 2223/2180/1865\nf 2643/2510/2182 2470/2507/2179 2473/2501/2173 2642/2500/2172\nf 1270/2509/2181 1271/2506/2178 2470/2507/2179 2643/2510/2182\nf 2317/2305/1990 1721/1691/1377 2079/1668/1354 2644/2283/1968\nf 2318/2294/1979 2317/2305/1990 2644/2283/1968 2645/2285/1970\nf 2319/2275/1960 2318/2294/1979 2645/2285/1970 2646/2281/1966\nf 2320/2276/1961 2319/2275/1960 2646/2281/1966 2647/2279/1964\nf 2321/2286/1971 2320/2276/1961 2647/2279/1964 2648/2273/1958\nf 2649/2265/1950 2322/2287/1972 2321/2286/1971 2648/2273/1958\nf 2650/2264/1949 2323/2306/1991 2322/2287/1972 2649/2265/1950\nf 2651/2299/1984 2324/2309/1994 2323/2306/1991 2650/2264/1949\nf 2473/2501/2173 2387/2390/2073 2324/2309/1994 2651/2299/1984\nf 2653/2622/2287 2654/2557/2222 2168/2103/1788 2173/2121/1806\nf 2656/2623/2288 2655/2554/2219 2174/2110/1795 2156/2109/1794\nf 2515/2100/1785 2652/2624/2223 2656/2623/2288 2156/2109/1794\nf 2157/2107/1792 2659/2556/2221 2653/2622/2287 2173/2121/1806\nusemtl BlackCloth\nf 338/2625/2289 330/2626/2290 331/2627/2291 339/2628/2292\nf 332/2629/2293 340/2630/2294 339/2628/2292 331/2627/2291\nf 333/2631/2295 341/2632/2296 340/2630/2294 332/2629/2293\nf 334/2633/2297 342/2634/2298 341/2632/2296 333/2631/2295\nf 335/2635/2299 343/2636/2300 342/2634/2298 334/2633/2297\nf 336/2637/2301 344/2638/2302 343/2636/2300 335/2635/2299\nf 337/2639/2303 345/2640/2304 344/2638/2302 336/2637/2301\nf 330/2626/2290 338/2625/2289 345/2641/2304 337/2642/2303\nf 347/2643/2305 354/2644/2306 426/2645/2307 346/2646/2308\nf 348/2647/2309 355/2648/2310 354/2644/2306 347/2643/2305\nf 349/2649/2311 356/2650/2312 355/2648/2310 348/2647/2309\nf 350/2651/2313 357/2652/2314 356/2650/2312 349/2649/2311\nf 351/2653/2315 358/2654/2316 357/2652/2314 350/2651/2313\nf 352/2655/2317 432/2656/2318 358/2654/2316 351/2653/2315\nf 353/2657/2319 359/2658/2320 432/2656/2318 352/2655/2317\nf 346/2646/2308 426/2645/2307 359/2659/2320 353/2660/2319\nf 331/2627/2291 330/2626/2290 369/2661/2321 368/2662/2322\nf 368/2662/2322 369/2661/2321 360/2663/2323 361/2664/2324\nf 332/2629/2293 331/2627/2291 368/2662/2322 370/2665/2325\nf 370/2665/2325 368/2662/2322 361/2664/2324 362/2666/2326\nf 333/2631/2295 332/2629/2293 370/2665/2325 371/2667/2327\nf 371/2667/2327 370/2665/2325 362/2666/2326 363/2668/2328\nf 334/2633/2297 333/2631/2295 371/2667/2327 372/2669/2329\nf 372/2669/2329 371/2667/2327 363/2668/2328 364/2670/2330\nf 335/2635/2299 334/2633/2297 372/2669/2329 373/2671/2331\nf 373/2671/2331 372/2669/2329 364/2670/2330 365/2672/2332\nf 336/2637/2301 335/2635/2299 373/2671/2331 374/2673/2333\nf 374/2673/2333 373/2671/2331 365/2672/2332 366/2674/2334\nf 337/2639/2303 336/2637/2301 374/2673/2333 375/2675/2335\nf 375/2675/2335 374/2673/2333 366/2674/2334 367/2676/2336\nf 330/2626/2290 337/2642/2303 375/2677/2335 369/2661/2321\nf 369/2661/2321 375/2677/2335 367/2678/2336 360/2663/2323\nf 355/2648/2310 377/2679/2337 376/2680/2338 354/2644/2306\nf 356/2650/2312 378/2681/2339 377/2679/2337 355/2648/2310\nf 357/2652/2314 379/2682/2340 378/2681/2339 356/2650/2312\nf 358/2654/2316 380/2683/2341 379/2682/2340 357/2652/2314\nf 377/2679/2337 382/2684/2342 381/2685/2343 376/2680/2338\nf 378/2681/2339 383/2686/2344 382/2684/2342 377/2679/2337\nf 379/2682/2340 384/2687/2345 383/2686/2344 378/2681/2339\nf 380/2683/2341 385/2688/2346 384/2687/2345 379/2682/2340\nf 382/2684/2342 387/2689/2347 386/2690/2348 381/2685/2343\nf 383/2686/2344 388/2691/2349 387/2689/2347 382/2684/2342\nf 384/2687/2345 389/2692/2350 388/2691/2349 383/2686/2344\nf 385/2688/2346 390/2693/2351 389/2692/2350 384/2687/2345\nf 385/2688/2346 465/2694/2352 466/2695/2353 390/2693/2351\nf 380/2683/2341 464/2696/2354 465/2694/2352 385/2688/2346\nf 358/2654/2316 432/2656/2318 464/2696/2354 380/2683/2341\nf 426/2645/2307 354/2644/2306 376/2680/2338 391/2697/2355\nf 376/2680/2338 381/2685/2343 392/2698/2356 391/2697/2355\nf 381/2685/2343 386/2690/2348 393/2699/2357 392/2698/2356\nf 338/2625/2289 339/2628/2292 395/2700/2358 394/2701/2359\nf 394/2701/2359 395/2700/2358 347/2643/2305 346/2646/2308\nf 339/2628/2292 340/2630/2294 396/2702/2360 395/2700/2358\nf 395/2700/2358 396/2702/2360 348/2647/2309 347/2643/2305\nf 340/2630/2294 341/2632/2296 397/2703/2361 396/2702/2360\nf 396/2702/2360 397/2703/2361 349/2649/2311 348/2647/2309\nf 341/2632/2296 342/2634/2298 398/2704/2362 397/2703/2361\nf 397/2703/2361 398/2704/2362 350/2651/2313 349/2649/2311\nf 342/2634/2298 343/2636/2300 399/2705/2363 398/2704/2362\nf 398/2704/2362 399/2705/2363 351/2653/2315 350/2651/2313\nf 343/2636/2300 344/2638/2302 400/2706/2364 399/2705/2363\nf 399/2705/2363 400/2706/2364 352/2655/2317 351/2653/2315\nf 344/2638/2302 345/2640/2304 401/2707/2365 400/2706/2364\nf 400/2706/2364 401/2707/2365 353/2657/2319 352/2655/2317\nf 345/2641/2304 338/2625/2289 394/2701/2359 401/2708/2365\nf 401/2708/2365 394/2701/2359 346/2646/2308 353/2660/2319\nf 403/2709/2366 402/2710/2367 410/2711/2368 411/2712/2369\nf 404/2713/2370 403/2709/2366 411/2712/2369 412/2714/2371\nf 405/2715/2372 404/2713/2370 412/2714/2371 413/2716/2373\nf 406/2717/2374 405/2715/2372 413/2716/2373 414/2718/2375\nf 407/2719/2376 406/2717/2374 414/2718/2375 415/2720/2377\nf 408/2721/2378 407/2719/2376 415/2720/2377 416/2722/2379\nf 409/2723/2380 408/2721/2378 416/2722/2379 417/2724/2381\nf 402/2710/2367 409/2725/2380 417/2726/2381 410/2711/2368\nf 419/2727/2382 418/2728/2383 426/2729/2307 427/2730/2384\nf 420/2731/2385 419/2727/2382 427/2730/2384 428/2732/2386\nf 421/2733/2387 420/2731/2385 428/2732/2386 429/2734/2388\nf 422/2735/2389 421/2733/2387 429/2734/2388 430/2736/2390\nf 423/2737/2391 422/2735/2389 430/2736/2390 431/2738/2392\nf 424/2739/2393 423/2737/2391 431/2738/2392 432/2740/2318\nf 425/2741/2394 424/2739/2393 432/2740/2318 359/2742/2320\nf 418/2728/2383 425/2743/2394 359/2744/2320 426/2729/2307\nf 442/2745/2395 402/2710/2367 403/2709/2366 441/2746/2396\nf 441/2746/2396 434/2747/2397 433/2748/2398 442/2745/2395\nf 404/2713/2370 443/2749/2399 441/2746/2396 403/2709/2366\nf 443/2749/2399 435/2750/2400 434/2747/2397 441/2746/2396\nf 405/2715/2372 444/2751/2401 443/2749/2399 404/2713/2370\nf 444/2751/2401 436/2752/2402 435/2750/2400 443/2749/2399\nf 406/2717/2374 445/2753/2403 444/2751/2401 405/2715/2372\nf 445/2753/2403 437/2754/2404 436/2752/2402 444/2751/2401\nf 407/2719/2376 446/2755/2405 445/2753/2403 406/2717/2374\nf 446/2755/2405 438/2756/2406 437/2754/2404 445/2753/2403\nf 408/2721/2378 447/2757/2407 446/2755/2405 407/2719/2376\nf 447/2757/2407 439/2758/2408 438/2756/2406 446/2755/2405\nf 409/2723/2380 448/2759/2409 447/2757/2407 408/2721/2378\nf 448/2759/2409 440/2760/2410 439/2758/2408 447/2757/2407\nf 402/2710/2367 442/2745/2395 448/2761/2409 409/2725/2380\nf 442/2745/2395 433/2748/2398 440/2762/2410 448/2761/2409\nf 428/2732/2386 427/2730/2384 449/2763/2411 450/2764/2412\nf 429/2734/2388 428/2732/2386 450/2764/2412 451/2765/2413\nf 430/2736/2390 429/2734/2388 451/2765/2413 452/2766/2414\nf 431/2738/2392 430/2736/2390 452/2766/2414 453/2767/2415\nf 450/2764/2412 449/2763/2411 454/2768/2416 455/2769/2417\nf 451/2765/2413 450/2764/2412 455/2769/2417 456/2770/2418\nf 452/2766/2414 451/2765/2413 456/2770/2418 457/2771/2419\nf 453/2767/2415 452/2766/2414 457/2771/2419 458/2772/2420\nf 455/2769/2417 454/2768/2416 459/2773/2421 460/2774/2422\nf 456/2770/2418 455/2769/2417 460/2774/2422 461/2775/2423\nf 457/2771/2419 456/2770/2418 461/2775/2423 462/2776/2424\nf 458/2772/2420 457/2771/2419 462/2776/2424 463/2777/2425\nf 458/2772/2420 463/2777/2425 466/2778/2353 465/2779/2352\nf 453/2767/2415 458/2772/2420 465/2779/2352 464/2780/2354\nf 431/2738/2392 453/2767/2415 464/2780/2354 432/2740/2318\nf 426/2729/2307 391/2781/2355 449/2763/2411 427/2730/2384\nf 449/2763/2411 391/2781/2355 392/2782/2356 454/2768/2416\nf 454/2768/2416 392/2782/2356 393/2783/2357 459/2773/2421\nf 410/2711/2368 467/2784/2426 468/2785/2427 411/2712/2369\nf 467/2784/2426 418/2728/2383 419/2727/2382 468/2785/2427\nf 411/2712/2369 468/2785/2427 469/2786/2428 412/2714/2371\nf 468/2785/2427 419/2727/2382 420/2731/2385 469/2786/2428\nf 412/2714/2371 469/2786/2428 470/2787/2429 413/2716/2373\nf 469/2786/2428 420/2731/2385 421/2733/2387 470/2787/2429\nf 413/2716/2373 470/2787/2429 471/2788/2430 414/2718/2375\nf 470/2787/2429 421/2733/2387 422/2735/2389 471/2788/2430\nf 414/2718/2375 471/2788/2430 472/2789/2431 415/2720/2377\nf 471/2788/2430 422/2735/2389 423/2737/2391 472/2789/2431\nf 415/2720/2377 472/2789/2431 473/2790/2432 416/2722/2379\nf 472/2789/2431 423/2737/2391 424/2739/2393 473/2790/2432\nf 416/2722/2379 473/2790/2432 474/2791/2433 417/2724/2381\nf 473/2790/2432 424/2739/2393 425/2741/2394 474/2791/2433\nf 417/2726/2381 474/2792/2433 467/2784/2426 410/2711/2368\nf 474/2792/2433 425/2743/2394 418/2728/2383 467/2784/2426\nf 722/2793/2434 721/2794/2435 734/2795/2436 735/2796/2437\nf 723/2797/2438 722/2793/2434 735/2796/2437 736/2798/2439\nf 724/2799/2440 723/2797/2438 736/2798/2439 737/2800/2441\nf 719/2801/2442 734/2795/2436 721/2794/2435 720/2802/2443\nf 724/2799/2440 737/2800/2441 729/2803/2444 725/2804/2445\nf 735/2796/2437 734/2795/2436 738/2805/2446 739/2806/2447\nf 736/2798/2439 735/2796/2437 739/2806/2447 740/2807/2448\nf 737/2800/2441 736/2798/2439 740/2807/2448 741/2808/2449\nf 718/2809/2450 738/2805/2446 734/2795/2436 719/2801/2442\nf 726/2810/2451 729/2803/2444 737/2800/2441 741/2808/2449\nf 738/2805/2446 742/2811/2452 743/2812/2453 739/2806/2447\nf 739/2806/2447 743/2812/2453 744/2813/2454 740/2807/2448\nf 740/2807/2448 744/2813/2454 745/2814/2455 741/2808/2449\nf 717/2815/2456 742/2811/2452 738/2805/2446 718/2809/2450\nf 726/2810/2451 741/2808/2449 745/2814/2455 727/2816/2457\nf 742/2811/2452 2819/2817/2458 2820/2818/2459 743/2812/2453\nf 743/2812/2453 2820/2818/2459 2821/2819/2460 744/2813/2454\nf 744/2813/2454 2821/2819/2460 2822/2820/2461 745/2814/2455\nf 727/2816/2457 745/2814/2455 2822/2820/2461 2823/2821/2462\nf 2824/2822/2463 2819/2817/2458 742/2811/2452 717/2815/2456\nf 2825/2823/2464 754/2824/2465 755/2825/2466 2826/2826/2467\nf 2826/2826/2467 755/2825/2466 756/2827/2468 2827/2828/2469\nf 2827/2829/2469 756/2830/2468 757/2831/2470 2828/2832/2471\nf 714/2833/2472 754/2824/2465 2825/2823/2464 2829/2834/2473\nf 2830/2835/2474 2828/2832/2471 757/2831/2470 885/2836/2475\nf 754/2824/2465 758/2837/2476 759/2838/2477 755/2825/2466\nf 755/2825/2466 759/2838/2477 760/2839/2478 756/2827/2468\nf 756/2830/2468 760/2840/2478 761/2841/2479 757/2831/2470\nf 713/2842/2480 758/2837/2476 754/2824/2465 714/2833/2472\nf 885/2836/2475 757/2831/2470 761/2841/2479 886/2843/2481\nf 763/2844/2482 762/2845/2483 770/2846/2484 771/2847/2485\nf 764/2848/2486 763/2844/2482 771/2847/2485 772/2849/2487\nf 765/2850/2488 764/2848/2486 772/2849/2487 773/2851/2489\nf 766/2852/2490 765/2850/2488 773/2851/2489 774/2853/2491\nf 767/2854/2492 766/2855/2490 774/2856/2491 775/2857/2493\nf 768/2858/2494 767/2854/2492 775/2857/2493 776/2859/2495\nf 769/2860/2496 768/2858/2494 776/2859/2495 777/2861/2497\nf 762/2845/2483 769/2860/2496 777/2861/2497 770/2846/2484\nf 759/2838/2477 765/2850/2488 766/2852/2490 760/2839/2478\nf 712/2862/2498 778/2863/2499 758/2837/2476 713/2842/2480\nf 758/2837/2476 778/2863/2499 779/2864/2500 759/2838/2477\nf 759/2838/2477 779/2864/2500 764/2848/2486 765/2850/2488\nf 760/2840/2478 766/2855/2490 767/2854/2492 780/2865/2501\nf 760/2840/2478 780/2865/2501 781/2866/2502 761/2841/2479\nf 886/2843/2481 761/2841/2479 781/2866/2502 731/2867/2503\nf 770/2846/2484 782/2868/2504 783/2869/2505 771/2847/2485\nf 771/2847/2485 783/2869/2505 784/2870/2506 772/2849/2487\nf 772/2849/2487 784/2870/2506 785/2871/2507 773/2851/2489\nf 773/2851/2489 785/2871/2507 786/2872/2508 774/2853/2491\nf 774/2856/2491 786/2873/2508 787/2874/2509 775/2857/2493\nf 775/2857/2493 787/2874/2509 788/2875/2510 776/2859/2495\nf 776/2859/2495 788/2875/2510 789/2876/2511 777/2861/2497\nf 777/2861/2497 789/2876/2511 782/2868/2504 770/2846/2484\nf 763/2844/2482 764/2848/2486 779/2864/2500 790/2877/2512\nf 767/2854/2492 768/2858/2494 791/2878/2513 780/2865/2501\nf 780/2865/2501 791/2878/2513 792/2879/2514 781/2866/2502\nf 731/2867/2503 781/2866/2502 792/2879/2514 732/2880/2515\nf 711/2881/2516 793/2882/2517 778/2863/2499 712/2862/2498\nf 778/2863/2499 793/2882/2517 790/2877/2512 779/2864/2500\nf 762/2845/2483 794/2883/2518 795/2884/2519 769/2860/2496\nf 762/2845/2483 763/2844/2482 790/2877/2512 794/2883/2518\nf 768/2858/2494 769/2860/2496 795/2884/2519 791/2878/2513\nf 710/2885/2520 796/2886/2521 793/2882/2517 711/2881/2516\nf 790/2877/2512 793/2882/2517 796/2886/2521 794/2883/2518\nf 791/2878/2513 795/2884/2519 797/2887/2522 792/2879/2514\nf 732/2880/2515 792/2879/2514 797/2887/2522 733/2888/2523\nf 2831/2889/2524 2832/2890/2525 804/2891/2526 803/2892/2527\nf 2834/2893/2528 2833/2894/2529 805/2895/2530 806/2896/2531\nf 2833/2894/2529 2831/2889/2524 803/2892/2527 805/2895/2530\nf 2835/2897/2532 2859/2898/2533 808/2899/2534 807/2900/2535\nf 2832/2890/2525 2835/2897/2532 807/2900/2535 804/2891/2526\nf 803/2892/2527 804/2891/2526 809/2901/2536 810/2902/2537\nf 806/2896/2531 805/2895/2530 812/2903/2538 811/2904/2539\nf 805/2895/2530 803/2892/2527 810/2902/2537 812/2903/2538\nf 807/2900/2535 808/2899/2534 814/2905/2540 813/2906/2541\nf 804/2891/2526 807/2900/2535 813/2906/2541 809/2901/2536\nf 795/2884/2519 794/2883/2518 816/2907/2542 815/2908/2543\nf 815/2908/2543 816/2907/2542 798/2909/2544 799/2910/2545\nf 796/2886/2521 710/2885/2520 818/2911/2546 817/2912/2547\nf 817/2912/2547 818/2911/2546 801/2913/2548 800/2914/2549\nf 794/2883/2518 796/2886/2521 817/2912/2547 816/2907/2542\nf 816/2907/2542 817/2912/2547 800/2914/2549 798/2909/2544\nf 733/2888/2523 797/2887/2522 819/2915/2550 971/2916/2551\nf 971/2916/2551 819/2915/2550 802/2917/2552 956/2918/2553\nf 797/2887/2522 795/2884/2519 815/2908/2543 819/2915/2550\nf 819/2915/2550 815/2908/2543 799/2910/2545 802/2917/2552\nf 782/2868/2504 820/2919/2554 821/2920/2555 783/2869/2505\nf 783/2869/2505 821/2920/2555 822/2921/2556 784/2870/2506\nf 784/2870/2506 822/2921/2556 823/2922/2557 785/2871/2507\nf 785/2871/2507 823/2922/2557 824/2923/2558 786/2872/2508\nf 786/2873/2508 824/2924/2558 825/2925/2559 787/2874/2509\nf 787/2874/2509 825/2925/2559 826/2926/2560 788/2875/2510\nf 788/2875/2510 826/2926/2560 827/2927/2561 789/2876/2511\nf 789/2876/2511 827/2927/2561 820/2919/2554 782/2868/2504\nf 820/2919/2554 829/2928/2562 828/2929/2563 821/2920/2555\nf 821/2920/2555 828/2929/2563 830/2930/2564 822/2921/2556\nf 822/2921/2556 830/2930/2564 831/2931/2565 823/2922/2557\nf 823/2922/2557 831/2931/2565 832/2932/2566 824/2923/2558\nf 824/2924/2558 832/2933/2566 833/2934/2567 825/2925/2559\nf 825/2925/2559 833/2934/2567 834/2935/2568 826/2926/2560\nf 826/2926/2560 834/2935/2568 835/2936/2569 827/2927/2561\nf 827/2927/2561 835/2936/2569 829/2928/2562 820/2919/2554\nf 829/2928/2562 836/2937/2570 837/2938/2571 828/2929/2563\nf 828/2929/2563 837/2938/2571 838/2939/2572 830/2930/2564\nf 830/2930/2564 838/2939/2572 839/2940/2573 831/2931/2565\nf 831/2931/2565 839/2940/2573 840/2941/2574 832/2932/2566\nf 832/2933/2566 840/2942/2574 841/2943/2575 833/2934/2567\nf 833/2934/2567 841/2943/2575 842/2944/2576 834/2935/2568\nf 834/2935/2568 842/2944/2576 843/2945/2577 835/2936/2569\nf 835/2936/2569 843/2945/2577 836/2937/2570 829/2928/2562\nf 836/2937/2570 2836/2946/2578 2837/2947/2579 837/2938/2571\nf 837/2938/2571 2837/2947/2579 2838/2948/2580 838/2939/2572\nf 838/2939/2572 2838/2948/2580 2839/2949/2581 839/2940/2573\nf 839/2940/2573 2839/2949/2581 2840/2950/2582 840/2941/2574\nf 840/2942/2574 2840/2951/2582 2841/2952/2583 841/2943/2575\nf 841/2943/2575 2841/2952/2583 2842/2953/2584 842/2944/2576\nf 842/2944/2576 2842/2953/2584 2843/2954/2585 843/2945/2577\nf 843/2945/2577 2843/2954/2585 2836/2946/2578 836/2937/2570\nf 844/2955/2586 845/2956/2587 852/2957/2588 853/2958/2589\nf 845/2956/2587 846/2959/2590 854/2960/2591 852/2957/2588\nf 846/2959/2590 847/2961/2592 855/2962/2593 854/2960/2591\nf 847/2961/2592 848/2963/2594 856/2964/2595 855/2962/2593\nf 848/2965/2594 849/2966/2596 857/2967/2597 856/2968/2595\nf 849/2966/2596 850/2969/2598 858/2970/2599 857/2967/2597\nf 850/2969/2598 851/2971/2600 859/2972/2601 858/2970/2599\nf 851/2971/2600 844/2955/2586 853/2958/2589 859/2972/2601\nf 853/2958/2589 852/2957/2588 861/2973/2602 860/2974/2603\nf 852/2957/2588 854/2960/2591 862/2975/2604 861/2973/2602\nf 854/2960/2591 855/2962/2593 863/2976/2605 862/2975/2604\nf 855/2962/2593 856/2964/2595 864/2977/2606 863/2976/2605\nf 856/2968/2595 857/2967/2597 865/2978/2607 864/2979/2606\nf 857/2967/2597 858/2970/2599 866/2980/2608 865/2978/2607\nf 858/2970/2599 859/2972/2601 867/2981/2609 866/2980/2608\nf 859/2972/2601 853/2958/2589 860/2974/2603 867/2981/2609\nf 880/2982/2610 888/2983/2611 887/2984/2612 879/2985/2613\nf 881/2986/2614 889/2987/2615 888/2983/2611 880/2982/2610\nf 882/2988/2616 890/2989/2617 889/2987/2615 881/2986/2614\nf 877/2990/2618 878/2991/2619 879/2985/2613 887/2984/2612\nf 882/2988/2616 883/2992/2620 884/2993/2621 890/2989/2617\nf 888/2983/2611 892/2994/2622 891/2995/2623 887/2984/2612\nf 889/2987/2615 893/2996/2624 892/2994/2622 888/2983/2611\nf 890/2989/2617 894/2997/2625 893/2996/2624 889/2987/2615\nf 876/2998/2626 877/2990/2618 887/2984/2612 891/2995/2623\nf 726/2810/2451 894/2997/2625 890/2989/2617 884/2993/2621\nf 891/2995/2623 892/2994/2622 896/2999/2627 895/3000/2628\nf 892/2994/2622 893/2996/2624 897/3001/2629 896/2999/2627\nf 893/2996/2624 894/2997/2625 898/3002/2630 897/3001/2629\nf 875/3003/2631 876/2998/2626 891/2995/2623 895/3000/2628\nf 726/2810/2451 727/2816/2457 898/3002/2630 894/2997/2625\nf 895/3000/2628 896/2999/2627 2845/3004/2632 2844/3005/2633\nf 896/2999/2627 897/3001/2629 2846/3006/2634 2845/3004/2632\nf 897/3001/2629 898/3002/2630 2847/3007/2635 2846/3006/2634\nf 727/2816/2457 2823/2821/2462 2847/3007/2635 898/3002/2630\nf 2848/3008/2636 875/3003/2631 895/3000/2628 2844/3005/2633\nf 2849/3009/2637 2850/3010/2638 908/3011/2639 907/3012/2640\nf 2850/3010/2638 2851/3013/2641 909/3014/2642 908/3011/2639\nf 2851/3015/2641 2852/3016/2643 910/3017/2644 909/3018/2642\nf 872/3019/2645 2853/3020/2646 2849/3009/2637 907/3012/2640\nf 2830/2835/2474 885/2836/2475 910/3017/2644 2852/3016/2643\nf 907/3012/2640 908/3011/2639 912/3021/2647 911/3022/2648\nf 908/3011/2639 909/3014/2642 913/3023/2649 912/3021/2647\nf 909/3018/2642 910/3017/2644 914/3024/2650 913/3025/2649\nf 871/3026/2651 872/3019/2645 907/3012/2640 911/3022/2648\nf 885/2836/2475 886/2843/2481 914/3024/2650 910/3017/2644\nf 916/3027/2652 924/3028/2653 923/3029/2654 915/3030/2655\nf 917/3031/2656 925/3032/2657 924/3028/2653 916/3027/2652\nf 918/3033/2658 926/3034/2659 925/3032/2657 917/3031/2656\nf 919/3035/2660 927/3036/2661 926/3034/2659 918/3033/2658\nf 920/3037/2662 928/3038/2663 927/3039/2661 919/3040/2660\nf 921/3041/2664 929/3042/2665 928/3038/2663 920/3037/2662\nf 922/3043/2666 930/3044/2667 929/3042/2665 921/3041/2664\nf 915/3030/2655 923/3029/2654 930/3044/2667 922/3043/2666\nf 912/3021/2647 913/3023/2649 919/3035/2660 918/3033/2658\nf 870/3045/2668 871/3026/2651 911/3022/2648 931/3046/2669\nf 911/3022/2648 912/3021/2647 932/3047/2670 931/3046/2669\nf 912/3021/2647 918/3033/2658 917/3031/2656 932/3047/2670\nf 913/3025/2649 933/3048/2671 920/3037/2662 919/3040/2660\nf 913/3025/2649 914/3024/2650 934/3049/2672 933/3048/2671\nf 886/2843/2481 731/2867/2503 934/3049/2672 914/3024/2650\nf 923/3029/2654 924/3028/2653 936/3050/2673 935/3051/2674\nf 924/3028/2653 925/3032/2657 937/3052/2675 936/3050/2673\nf 925/3032/2657 926/3034/2659 938/3053/2676 937/3052/2675\nf 926/3034/2659 927/3036/2661 939/3054/2677 938/3053/2676\nf 927/3039/2661 928/3038/2663 940/3055/2678 939/3056/2677\nf 928/3038/2663 929/3042/2665 941/3057/2679 940/3055/2678\nf 929/3042/2665 930/3044/2667 942/3058/2680 941/3057/2679\nf 930/3044/2667 923/3029/2654 935/3051/2674 942/3058/2680\nf 916/3027/2652 943/3059/2681 932/3047/2670 917/3031/2656\nf 920/3037/2662 933/3048/2671 944/3060/2682 921/3041/2664\nf 933/3048/2671 934/3049/2672 945/3061/2683 944/3060/2682\nf 731/2867/2503 732/2880/2515 945/3061/2683 934/3049/2672\nf 869/3062/2684 870/3045/2668 931/3046/2669 946/3063/2685\nf 931/3046/2669 932/3047/2670 943/3059/2681 946/3063/2685\nf 915/3030/2655 922/3043/2666 948/3064/2686 947/3065/2687\nf 915/3030/2655 947/3065/2687 943/3059/2681 916/3027/2652\nf 921/3041/2664 944/3060/2682 948/3064/2686 922/3043/2666\nf 868/3066/2688 869/3062/2684 946/3063/2685 949/3067/2689\nf 943/3059/2681 947/3065/2687 949/3067/2689 946/3063/2685\nf 944/3060/2682 945/3061/2683 950/3068/2690 948/3064/2686\nf 732/2880/2515 733/2888/2523 950/3068/2690 945/3061/2683\nf 2854/3069/2691 957/3070/2692 958/3071/2693 2855/3072/2694\nf 2857/3073/2695 960/3074/2696 959/3075/2697 2856/3076/2698\nf 2856/3076/2698 959/3075/2697 957/3070/2692 2854/3069/2691\nf 2858/3077/2699 961/3078/2700 808/2899/2534 2859/2898/2533\nf 2855/3072/2694 958/3071/2693 961/3078/2700 2858/3077/2699\nf 957/3070/2692 963/3079/2701 962/3080/2702 958/3071/2693\nf 960/3074/2696 964/3081/2703 965/3082/2704 959/3075/2697\nf 959/3075/2697 965/3082/2704 963/3079/2701 957/3070/2692\nf 961/3078/2700 966/3083/2705 814/2905/2540 808/2899/2534\nf 958/3071/2693 962/3080/2702 966/3083/2705 961/3078/2700\nf 948/3064/2686 967/3084/2706 968/3085/2707 947/3065/2687\nf 967/3084/2706 952/3086/2708 951/3087/2709 968/3085/2707\nf 970/3088/2710 868/3066/2688 949/3067/2689 969/3089/2711\nf 969/3089/2711 953/3090/2712 954/3091/2713 970/3088/2710\nf 947/3065/2687 968/3085/2707 969/3089/2711 949/3067/2689\nf 968/3085/2707 951/3087/2709 953/3090/2712 969/3089/2711\nf 733/2888/2523 971/2916/2551 972/3092/2714 950/3068/2690\nf 971/2916/2551 956/2918/2553 955/3093/2715 972/3092/2714\nf 950/3068/2690 972/3092/2714 967/3084/2706 948/3064/2686\nf 972/3092/2714 955/3093/2715 952/3086/2708 967/3084/2706\nf 935/3051/2674 936/3050/2673 974/3094/2716 973/3095/2717\nf 936/3050/2673 937/3052/2675 975/3096/2718 974/3094/2716\nf 937/3052/2675 938/3053/2676 976/3097/2719 975/3096/2718\nf 938/3053/2676 939/3054/2677 977/3098/2720 976/3097/2719\nf 939/3056/2677 940/3055/2678 978/3099/2721 977/3100/2720\nf 940/3055/2678 941/3057/2679 979/3101/2722 978/3099/2721\nf 941/3057/2679 942/3058/2680 980/3102/2723 979/3101/2722\nf 942/3058/2680 935/3051/2674 973/3095/2717 980/3102/2723\nf 973/3095/2717 974/3094/2716 981/3103/2724 982/3104/2725\nf 974/3094/2716 975/3096/2718 983/3105/2726 981/3103/2724\nf 975/3096/2718 976/3097/2719 984/3106/2727 983/3105/2726\nf 976/3097/2719 977/3098/2720 985/3107/2728 984/3106/2727\nf 977/3100/2720 978/3099/2721 986/3108/2729 985/3109/2728\nf 978/3099/2721 979/3101/2722 987/3110/2730 986/3108/2729\nf 979/3101/2722 980/3102/2723 988/3111/2731 987/3110/2730\nf 980/3102/2723 973/3095/2717 982/3104/2725 988/3111/2731\nf 982/3104/2725 981/3103/2724 990/3112/2732 989/3113/2733\nf 981/3103/2724 983/3105/2726 991/3114/2734 990/3112/2732\nf 983/3105/2726 984/3106/2727 992/3115/2735 991/3114/2734\nf 984/3106/2727 985/3107/2728 993/3116/2736 992/3115/2735\nf 985/3109/2728 986/3108/2729 994/3117/2737 993/3118/2736\nf 986/3108/2729 987/3110/2730 995/3119/2738 994/3117/2737\nf 987/3110/2730 988/3111/2731 996/3120/2739 995/3119/2738\nf 988/3111/2731 982/3104/2725 989/3113/2733 996/3120/2739\nf 989/3113/2733 990/3112/2732 2861/3121/2740 2860/3122/2741\nf 990/3112/2732 991/3114/2734 2862/3123/2742 2861/3121/2740\nf 991/3114/2734 992/3115/2735 2863/3124/2743 2862/3123/2742\nf 992/3115/2735 993/3116/2736 2864/3125/2744 2863/3124/2743\nf 993/3118/2736 994/3117/2737 2865/3126/2745 2864/3127/2744\nf 994/3117/2737 995/3119/2738 2866/3128/2746 2865/3126/2745\nf 995/3119/2738 996/3120/2739 2867/3129/2747 2866/3128/2746\nf 996/3120/2739 989/3113/2733 2860/3122/2741 2867/3129/2747\nf 997/3130/2748 1006/3131/2749 1005/3132/2750 998/3133/2751\nf 998/3133/2751 1005/3132/2750 1007/3134/2752 999/3135/2753\nf 999/3135/2753 1007/3134/2752 1008/3136/2754 1000/3137/2755\nf 1000/3137/2755 1008/3136/2754 1009/3138/2756 1001/3139/2757\nf 1001/3140/2757 1009/3141/2756 1010/3142/2758 1002/3143/2759\nf 1002/3143/2759 1010/3142/2758 1011/3144/2760 1003/3145/2761\nf 1003/3145/2761 1011/3144/2760 1012/3146/2762 1004/3147/2763\nf 1004/3147/2763 1012/3146/2762 1006/3131/2749 997/3130/2748\nf 1006/3131/2749 1013/3148/2764 1014/3149/2765 1005/3132/2750\nf 1005/3132/2750 1014/3149/2765 1015/3150/2766 1007/3134/2752\nf 1007/3134/2752 1015/3150/2766 1016/3151/2767 1008/3136/2754\nf 1008/3136/2754 1016/3151/2767 1017/3152/2768 1009/3138/2756\nf 1009/3141/2756 1017/3153/2768 1018/3154/2769 1010/3142/2758\nf 1010/3142/2758 1018/3154/2769 1019/3155/2770 1011/3144/2760\nf 1011/3144/2760 1019/3155/2770 1020/3156/2771 1012/3146/2762\nf 1012/3146/2762 1020/3156/2771 1013/3148/2764 1006/3131/2749\n" }, { "path": "demo/simplify.html", "content": "\n\n\t\n\t\tmeshoptimizer - demo\n\t\t\n\t\t\n\t\t\n\n\t\t\n\t\n\n\t\n\t\t
\n\t\t\n\n\t\t\n\t\n\n" }, { "path": "demo/tests.cpp", "content": "#include \"../src/meshoptimizer.h\"\n\n#include \n#include \n#include \n#include \n\n#include \n\n// This file uses assert() to verify algorithm correctness\n#undef NDEBUG\n#include \n\nstruct PV\n{\n\tunsigned short px, py, pz;\n\tunsigned char nu, nv; // octahedron encoded normal, aliases .pw\n\tunsigned short tx, ty;\n};\n\n// note: 4 6 5 triangle here is a combo-breaker:\n// we encode it without rotating, a=next, c=next - this means we do *not* bump next to 6\n// which means that the next triangle can't be encoded via next sequencing!\nstatic const unsigned int kIndexBuffer[] = {0, 1, 2, 2, 1, 3, 4, 6, 5, 7, 8, 9};\n\nstatic const unsigned char kIndexDataV0[] = {\n 0xe0, 0xf0, 0x10, 0xfe, 0xff, 0xf0, 0x0c, 0xff, 0x02, 0x02, 0x02, 0x00, 0x76, 0x87, 0x56, 0x67,\n 0x78, 0xa9, 0x86, 0x65, 0x89, 0x68, 0x98, 0x01, 0x69, 0x00, 0x00, // clang-format :-/\n};\n\n// note: this exercises two features of v1 format, restarts (0 1 2) and last\nstatic const unsigned int kIndexBufferTricky[] = {0, 1, 2, 2, 1, 3, 0, 1, 2, 2, 1, 5, 2, 1, 4};\n\nstatic const unsigned char kIndexDataV1[] = {\n 0xe1, 0xf0, 0x10, 0xfe, 0x1f, 0x3d, 0x00, 0x0a, 0x00, 0x76, 0x87, 0x56, 0x67, 0x78, 0xa9, 0x86,\n 0x65, 0x89, 0x68, 0x98, 0x01, 0x69, 0x00, 0x00, // clang-format :-/\n};\n\nstatic const unsigned int kIndexSequence[] = {0, 1, 51, 2, 49, 1000};\n\nstatic const unsigned char kIndexSequenceV1[] = {\n 0xd1, 0x00, 0x04, 0xcd, 0x01, 0x04, 0x07, 0x98, 0x1f, 0x00, 0x00, 0x00, 0x00, // clang-format :-/\n};\n\nstatic const PV kVertexBuffer[] = {\n {0, 0, 0, 0, 0, 0, 0},\n {300, 0, 0, 0, 0, 500, 0},\n {0, 300, 0, 0, 0, 0, 500},\n {300, 300, 0, 0, 0, 500, 500},\n};\n\nstatic const unsigned char kVertexDataV0[] = {\n 0xa0, 0x01, 0x3f, 0x00, 0x00, 0x00, 0x58, 0x57, 0x58, 0x01, 0x26, 0x00, 0x00, 0x00, 0x01, 0x0c,\n 0x00, 0x00, 0x00, 0x58, 0x01, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x3f, 0x00,\n 0x00, 0x00, 0x17, 0x18, 0x17, 0x01, 0x26, 0x00, 0x00, 0x00, 0x01, 0x0c, 0x00, 0x00, 0x00, 0x17,\n 0x01, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\n 0x00, 0x00, 0x00, 0x00, 0x00, // clang-format :-/\n};\n\nstatic const unsigned char kVertexDataV1[] = {\n 0xa1, 0xee, 0xaa, 0xee, 0x00, 0x4b, 0x4b, 0x4b, 0x00, 0x00, 0x4b, 0x00, 0x00, 0x7d, 0x7d, 0x7d,\n 0x00, 0x00, 0x7d, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x62, 0x00, 0x62, // clang-format :-/\n};\n\n// This binary blob is a valid v1 encoding of vertex buffer but it used a custom version of\n// the encoder that exercised all features of the format; because of this it is much larger\n// and will never be produced by the encoder itself.\nstatic const unsigned char kVertexDataV1Custom[] = {\n 0xa1, 0xd4, 0x94, 0xd4, 0x01, 0x0e, 0x00, 0x58, 0x57, 0x58, 0x02, 0x02, 0x12, 0x00, 0x00, 0x00,\n 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x58, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00,\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\n 0x00, 0x0e, 0x00, 0x7d, 0x7d, 0x7d, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7d, 0x00, 0x00,\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x62, // clang-format :-/\n};\n\nstatic void decodeIndexV0()\n{\n\tconst size_t index_count = sizeof(kIndexBuffer) / sizeof(kIndexBuffer[0]);\n\n\tstd::vector buffer(kIndexDataV0, kIndexDataV0 + sizeof(kIndexDataV0));\n\n\tunsigned int decoded[index_count];\n\tassert(meshopt_decodeIndexBuffer(decoded, index_count, &buffer[0], buffer.size()) == 0);\n\tassert(memcmp(decoded, kIndexBuffer, sizeof(kIndexBuffer)) == 0);\n}\n\nstatic void decodeIndexV1()\n{\n\tconst size_t index_count = sizeof(kIndexBufferTricky) / sizeof(kIndexBufferTricky[0]);\n\n\tstd::vector buffer(kIndexDataV1, kIndexDataV1 + sizeof(kIndexDataV1));\n\n\tunsigned int decoded[index_count];\n\tassert(meshopt_decodeIndexBuffer(decoded, index_count, &buffer[0], buffer.size()) == 0);\n\tassert(memcmp(decoded, kIndexBufferTricky, sizeof(kIndexBufferTricky)) == 0);\n}\n\nstatic void decodeIndexV1More()\n{\n\tconst unsigned char input[] = {\n\t 0xe1, 0xf0, 0x10, 0xfe, 0xff, 0xf0, 0x0c, 0xff, 0x02, 0x02, 0x02, 0x00, 0x76, 0x87, 0x56, 0x67,\n\t 0x78, 0xa9, 0x86, 0x65, 0x89, 0x68, 0x98, 0x01, 0x69, 0x00, 0x00, // clang-format\n\t};\n\n\tconst unsigned int ib[] = {0, 1, 2, 2, 1, 3, 4, 6, 5, 7, 8, 9};\n\tconst size_t index_count = sizeof(ib) / sizeof(ib[0]);\n\n\tstd::vector buffer(input, input + sizeof(input));\n\n\tunsigned int decoded[index_count];\n\tassert(meshopt_decodeIndexBuffer(decoded, index_count, 4, &buffer[0], buffer.size()) == 0);\n\tassert(memcmp(decoded, ib, sizeof(ib)) == 0);\n}\n\nstatic void decodeIndexV1ThreeEdges()\n{\n\tconst unsigned char input[] = {\n\t 0xe1, 0xf0, 0x20, 0x30, 0x40, 0x00, 0x76, 0x87, 0x56, 0x67, 0x78, 0xa9, 0x86, 0x65, 0x89, 0x68,\n\t 0x98, 0x01, 0x69, 0x00, 0x00, // clang-format\n\t};\n\n\tconst unsigned int ib[] = {0, 1, 2, 1, 0, 3, 2, 1, 4, 0, 2, 5};\n\tconst size_t index_count = sizeof(ib) / sizeof(ib[0]);\n\n\tstd::vector buffer(input, input + sizeof(input));\n\n\tunsigned int decoded[index_count];\n\tassert(meshopt_decodeIndexBuffer(decoded, index_count, 4, &buffer[0], buffer.size()) == 0);\n\tassert(memcmp(decoded, ib, sizeof(ib)) == 0);\n}\n\nstatic void decodeIndex16()\n{\n\tconst size_t index_count = sizeof(kIndexBuffer) / sizeof(kIndexBuffer[0]);\n\tconst size_t vertex_count = 10;\n\n\tstd::vector buffer(meshopt_encodeIndexBufferBound(index_count, vertex_count));\n\tbuffer.resize(meshopt_encodeIndexBuffer(&buffer[0], buffer.size(), kIndexBuffer, index_count));\n\n\tunsigned short decoded[index_count];\n\tassert(meshopt_decodeIndexBuffer(decoded, index_count, &buffer[0], buffer.size()) == 0);\n\n\tfor (size_t i = 0; i < index_count; ++i)\n\t\tassert(decoded[i] == kIndexBuffer[i]);\n}\n\nstatic void encodeIndexMemorySafe()\n{\n\tconst size_t index_count = sizeof(kIndexBuffer) / sizeof(kIndexBuffer[0]);\n\tconst size_t vertex_count = 10;\n\n\tstd::vector buffer(meshopt_encodeIndexBufferBound(index_count, vertex_count));\n\tbuffer.resize(meshopt_encodeIndexBuffer(&buffer[0], buffer.size(), kIndexBuffer, index_count));\n\n\t// check that encode is memory-safe; note that we reallocate the buffer for each try to make sure ASAN can verify buffer access\n\tfor (size_t i = 0; i <= buffer.size(); ++i)\n\t{\n\t\tstd::vector shortbuffer(i);\n\t\tsize_t result = meshopt_encodeIndexBuffer(i == 0 ? NULL : &shortbuffer[0], i, kIndexBuffer, index_count);\n\n\t\tif (i == buffer.size())\n\t\t\tassert(result == buffer.size());\n\t\telse\n\t\t\tassert(result == 0);\n\t}\n}\n\nstatic void decodeIndexMemorySafe()\n{\n\tconst size_t index_count = sizeof(kIndexBuffer) / sizeof(kIndexBuffer[0]);\n\tconst size_t vertex_count = 10;\n\n\tstd::vector buffer(meshopt_encodeIndexBufferBound(index_count, vertex_count));\n\tbuffer.resize(meshopt_encodeIndexBuffer(&buffer[0], buffer.size(), kIndexBuffer, index_count));\n\n\t// check that decode is memory-safe; note that we reallocate the buffer for each try to make sure ASAN can verify buffer access\n\tunsigned int decoded[index_count];\n\n\tfor (size_t i = 0; i <= buffer.size(); ++i)\n\t{\n\t\tstd::vector shortbuffer(buffer.begin(), buffer.begin() + i);\n\t\tint result = meshopt_decodeIndexBuffer(decoded, index_count, i == 0 ? NULL : &shortbuffer[0], i);\n\n\t\tif (i == buffer.size())\n\t\t\tassert(result == 0);\n\t\telse\n\t\t\tassert(result < 0);\n\t}\n}\n\nstatic void decodeIndexRejectExtraBytes()\n{\n\tconst size_t index_count = sizeof(kIndexBuffer) / sizeof(kIndexBuffer[0]);\n\tconst size_t vertex_count = 10;\n\n\tstd::vector buffer(meshopt_encodeIndexBufferBound(index_count, vertex_count));\n\tbuffer.resize(meshopt_encodeIndexBuffer(&buffer[0], buffer.size(), kIndexBuffer, index_count));\n\n\t// check that decoder doesn't accept extra bytes after a valid stream\n\tstd::vector largebuffer(buffer);\n\tlargebuffer.push_back(0);\n\n\tunsigned int decoded[index_count];\n\tassert(meshopt_decodeIndexBuffer(decoded, index_count, &largebuffer[0], largebuffer.size()) < 0);\n}\n\nstatic void decodeIndexRejectMalformedHeaders()\n{\n\tconst size_t index_count = sizeof(kIndexBuffer) / sizeof(kIndexBuffer[0]);\n\tconst size_t vertex_count = 10;\n\n\tstd::vector buffer(meshopt_encodeIndexBufferBound(index_count, vertex_count));\n\tbuffer.resize(meshopt_encodeIndexBuffer(&buffer[0], buffer.size(), kIndexBuffer, index_count));\n\n\t// check that decoder doesn't accept malformed headers\n\tstd::vector brokenbuffer(buffer);\n\tbrokenbuffer[0] = 0;\n\n\tunsigned int decoded[index_count];\n\tassert(meshopt_decodeIndexBuffer(decoded, index_count, &brokenbuffer[0], brokenbuffer.size()) < 0);\n}\n\nstatic void decodeIndexRejectInvalidVersion()\n{\n\tconst size_t index_count = sizeof(kIndexBuffer) / sizeof(kIndexBuffer[0]);\n\tconst size_t vertex_count = 10;\n\n\tstd::vector buffer(meshopt_encodeIndexBufferBound(index_count, vertex_count));\n\tbuffer.resize(meshopt_encodeIndexBuffer(&buffer[0], buffer.size(), kIndexBuffer, index_count));\n\n\t// check that decoder doesn't accept invalid version\n\tstd::vector brokenbuffer(buffer);\n\tbrokenbuffer[0] |= 0x0f;\n\n\tunsigned int decoded[index_count];\n\tassert(meshopt_decodeIndexBuffer(decoded, index_count, &brokenbuffer[0], brokenbuffer.size()) < 0);\n}\n\nstatic void decodeIndexMalformedVByte()\n{\n\tconst unsigned char input[] = {\n\t 0xe1, 0x20, 0x20, 0x20, 0xff, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,\n\t 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,\n\t 0xff, 0xff, 0xff, 0xff, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,\n\t 0x20, 0x20, 0x20, // clang-format :-/\n\t};\n\n\tunsigned int decoded[66];\n\tassert(meshopt_decodeIndexBuffer(decoded, 66, input, sizeof(input)) < 0);\n}\n\nstatic void roundtripIndexTricky()\n{\n\tconst size_t index_count = sizeof(kIndexBufferTricky) / sizeof(kIndexBufferTricky[0]);\n\tconst size_t vertex_count = 6;\n\n\tstd::vector buffer(meshopt_encodeIndexBufferBound(index_count, vertex_count));\n\tbuffer.resize(meshopt_encodeIndexBuffer(&buffer[0], buffer.size(), kIndexBufferTricky, index_count));\n\n\tunsigned int decoded[index_count];\n\tassert(meshopt_decodeIndexBuffer(decoded, index_count, &buffer[0], buffer.size()) == 0);\n\tassert(memcmp(decoded, kIndexBufferTricky, sizeof(kIndexBufferTricky)) == 0);\n}\n\nstatic void encodeIndexEmpty()\n{\n\tstd::vector buffer(meshopt_encodeIndexBufferBound(0, 0));\n\tbuffer.resize(meshopt_encodeIndexBuffer(&buffer[0], buffer.size(), NULL, 0));\n\n\tassert(meshopt_decodeIndexBuffer(static_cast(NULL), 0, &buffer[0], buffer.size()) == 0);\n}\n\nstatic void decodeIndexSequence()\n{\n\tconst size_t index_count = sizeof(kIndexSequence) / sizeof(kIndexSequence[0]);\n\n\tstd::vector buffer(kIndexSequenceV1, kIndexSequenceV1 + sizeof(kIndexSequenceV1));\n\n\tunsigned int decoded[index_count];\n\tassert(meshopt_decodeIndexSequence(decoded, index_count, &buffer[0], buffer.size()) == 0);\n\tassert(memcmp(decoded, kIndexSequence, sizeof(kIndexSequence)) == 0);\n}\n\nstatic void decodeIndexSequence16()\n{\n\tconst size_t index_count = sizeof(kIndexSequence) / sizeof(kIndexSequence[0]);\n\tconst size_t vertex_count = 1001;\n\n\tstd::vector buffer(meshopt_encodeIndexSequenceBound(index_count, vertex_count));\n\tbuffer.resize(meshopt_encodeIndexSequence(&buffer[0], buffer.size(), kIndexSequence, index_count));\n\n\tunsigned short decoded[index_count];\n\tassert(meshopt_decodeIndexSequence(decoded, index_count, &buffer[0], buffer.size()) == 0);\n\n\tfor (size_t i = 0; i < index_count; ++i)\n\t\tassert(decoded[i] == kIndexSequence[i]);\n}\n\nstatic void encodeIndexSequenceMemorySafe()\n{\n\tconst size_t index_count = sizeof(kIndexSequence) / sizeof(kIndexSequence[0]);\n\tconst size_t vertex_count = 1001;\n\n\tstd::vector buffer(meshopt_encodeIndexSequenceBound(index_count, vertex_count));\n\tbuffer.resize(meshopt_encodeIndexSequence(&buffer[0], buffer.size(), kIndexSequence, index_count));\n\n\t// check that encode is memory-safe; note that we reallocate the buffer for each try to make sure ASAN can verify buffer access\n\tfor (size_t i = 0; i <= buffer.size(); ++i)\n\t{\n\t\tstd::vector shortbuffer(i);\n\t\tsize_t result = meshopt_encodeIndexSequence(i == 0 ? NULL : &shortbuffer[0], i, kIndexSequence, index_count);\n\n\t\tif (i == buffer.size())\n\t\t\tassert(result == buffer.size());\n\t\telse\n\t\t\tassert(result == 0);\n\t}\n}\n\nstatic void decodeIndexSequenceMemorySafe()\n{\n\tconst size_t index_count = sizeof(kIndexSequence) / sizeof(kIndexSequence[0]);\n\tconst size_t vertex_count = 1001;\n\n\tstd::vector buffer(meshopt_encodeIndexSequenceBound(index_count, vertex_count));\n\tbuffer.resize(meshopt_encodeIndexSequence(&buffer[0], buffer.size(), kIndexSequence, index_count));\n\n\t// check that decode is memory-safe; note that we reallocate the buffer for each try to make sure ASAN can verify buffer access\n\tunsigned int decoded[index_count];\n\n\tfor (size_t i = 0; i <= buffer.size(); ++i)\n\t{\n\t\tstd::vector shortbuffer(buffer.begin(), buffer.begin() + i);\n\t\tint result = meshopt_decodeIndexSequence(decoded, index_count, i == 0 ? NULL : &shortbuffer[0], i);\n\n\t\tif (i == buffer.size())\n\t\t\tassert(result == 0);\n\t\telse\n\t\t\tassert(result < 0);\n\t}\n}\n\nstatic void decodeIndexSequenceRejectExtraBytes()\n{\n\tconst size_t index_count = sizeof(kIndexSequence) / sizeof(kIndexSequence[0]);\n\tconst size_t vertex_count = 1001;\n\n\tstd::vector buffer(meshopt_encodeIndexSequenceBound(index_count, vertex_count));\n\tbuffer.resize(meshopt_encodeIndexSequence(&buffer[0], buffer.size(), kIndexSequence, index_count));\n\n\t// check that decoder doesn't accept extra bytes after a valid stream\n\tstd::vector largebuffer(buffer);\n\tlargebuffer.push_back(0);\n\n\tunsigned int decoded[index_count];\n\tassert(meshopt_decodeIndexSequence(decoded, index_count, &largebuffer[0], largebuffer.size()) < 0);\n}\n\nstatic void decodeIndexSequenceRejectMalformedHeaders()\n{\n\tconst size_t index_count = sizeof(kIndexSequence) / sizeof(kIndexSequence[0]);\n\tconst size_t vertex_count = 1001;\n\n\tstd::vector buffer(meshopt_encodeIndexSequenceBound(index_count, vertex_count));\n\tbuffer.resize(meshopt_encodeIndexSequence(&buffer[0], buffer.size(), kIndexSequence, index_count));\n\n\t// check that decoder doesn't accept malformed headers\n\tstd::vector brokenbuffer(buffer);\n\tbrokenbuffer[0] = 0;\n\n\tunsigned int decoded[index_count];\n\tassert(meshopt_decodeIndexSequence(decoded, index_count, &brokenbuffer[0], brokenbuffer.size()) < 0);\n}\n\nstatic void decodeIndexSequenceRejectInvalidVersion()\n{\n\tconst size_t index_count = sizeof(kIndexSequence) / sizeof(kIndexSequence[0]);\n\tconst size_t vertex_count = 1001;\n\n\tstd::vector buffer(meshopt_encodeIndexSequenceBound(index_count, vertex_count));\n\tbuffer.resize(meshopt_encodeIndexSequence(&buffer[0], buffer.size(), kIndexSequence, index_count));\n\n\t// check that decoder doesn't accept invalid version\n\tstd::vector brokenbuffer(buffer);\n\tbrokenbuffer[0] |= 0x0f;\n\n\tunsigned int decoded[index_count];\n\tassert(meshopt_decodeIndexSequence(decoded, index_count, &brokenbuffer[0], brokenbuffer.size()) < 0);\n}\n\nstatic void encodeIndexSequenceEmpty()\n{\n\tstd::vector buffer(meshopt_encodeIndexSequenceBound(0, 0));\n\tbuffer.resize(meshopt_encodeIndexSequence(&buffer[0], buffer.size(), NULL, 0));\n\n\tassert(meshopt_decodeIndexSequence(static_cast(NULL), 0, &buffer[0], buffer.size()) == 0);\n}\n\nstatic void decodeVertexV0()\n{\n\tconst size_t vertex_count = sizeof(kVertexBuffer) / sizeof(kVertexBuffer[0]);\n\n\tstd::vector buffer(kVertexDataV0, kVertexDataV0 + sizeof(kVertexDataV0));\n\n\tPV decoded[vertex_count];\n\tassert(meshopt_decodeVertexBuffer(decoded, vertex_count, sizeof(PV), &buffer[0], buffer.size()) == 0);\n\tassert(memcmp(decoded, kVertexBuffer, sizeof(kVertexBuffer)) == 0);\n}\n\nstatic void decodeVertexV0More()\n{\n\tconst unsigned char expected[] = {\n\t 0, 0, 0, 0, 0, 1, 2, 8, 0, 2, 4, 16, 0, 3, 6, 24,\n\t 0, 4, 8, 32, 0, 5, 10, 40, 0, 6, 12, 48, 0, 7, 14, 56,\n\t 0, 8, 16, 64, 0, 9, 18, 72, 0, 10, 20, 80, 0, 11, 22, 88,\n\t 0, 12, 24, 96, 0, 13, 26, 104, 0, 14, 28, 112, 0, 15, 30, 120, // clang-format :-/\n\t};\n\n\tconst unsigned char input[] = {\n\t 0xa0, 0x00, 0x01, 0x2a, 0xaa, 0xaa, 0xaa, 0x02, 0x04, 0x44, 0x44, 0x44, 0x44, 0x44, 0x44, 0x44,\n\t 0x03, 0x00, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10,\n\t 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\n\t 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\n\t 0x00, // clang-format :-/\n\t};\n\n\tunsigned char decoded[sizeof(expected)];\n\tassert(meshopt_decodeVertexBuffer(decoded, 16, 4, input, sizeof(input)) == 0);\n\tassert(memcmp(decoded, expected, sizeof(expected)) == 0);\n}\n\nstatic void decodeVertexV0Mode2()\n{\n\tconst unsigned char expected[] = {\n\t 0, 0, 0, 0, 4, 5, 6, 7, 8, 10, 12, 14, 12, 15, 18, 21,\n\t 16, 20, 24, 28, 20, 25, 30, 35, 24, 30, 36, 42, 28, 35, 42, 49,\n\t 32, 40, 48, 56, 36, 45, 54, 63, 40, 50, 60, 70, 44, 55, 66, 77,\n\t 48, 60, 72, 84, 52, 65, 78, 91, 56, 70, 84, 98, 60, 75, 90, 105, // clang-format :-/\n\t};\n\n\tconst unsigned char input[] = {\n\t 0xa0, 0x02, 0x08, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x02, 0x0a, 0xaa, 0xaa, 0xaa, 0xaa,\n\t 0xaa, 0xaa, 0xaa, 0x02, 0x0c, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0x02, 0x0e, 0xee, 0xee,\n\t 0xee, 0xee, 0xee, 0xee, 0xee, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\n\t 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\n\t 0x00, 0x00, 0x00, 0x00, 0x00, // clang-format :-/\n\t};\n\n\tunsigned char decoded[sizeof(expected)];\n\tassert(meshopt_decodeVertexBuffer(decoded, 16, 4, input, sizeof(input)) == 0);\n\tassert(memcmp(decoded, expected, sizeof(expected)) == 0);\n}\n\nstatic void decodeVertexV1()\n{\n\tconst size_t vertex_count = sizeof(kVertexBuffer) / sizeof(kVertexBuffer[0]);\n\n\tstd::vector buffer(kVertexDataV1, kVertexDataV1 + sizeof(kVertexDataV1));\n\n\tPV decoded[vertex_count];\n\tassert(meshopt_decodeVertexBuffer(decoded, vertex_count, sizeof(PV), &buffer[0], buffer.size()) == 0);\n\tassert(memcmp(decoded, kVertexBuffer, sizeof(kVertexBuffer)) == 0);\n}\n\nstatic void decodeVertexV1Custom()\n{\n\tconst size_t vertex_count = sizeof(kVertexBuffer) / sizeof(kVertexBuffer[0]);\n\n\tstd::vector buffer(kVertexDataV1Custom, kVertexDataV1Custom + sizeof(kVertexDataV1Custom));\n\n\tPV decoded[vertex_count];\n\tassert(meshopt_decodeVertexBuffer(decoded, vertex_count, sizeof(PV), &buffer[0], buffer.size()) == 0);\n\tassert(memcmp(decoded, kVertexBuffer, sizeof(kVertexBuffer)) == 0);\n}\n\nstatic void decodeVertexV1Deltas()\n{\n\tconst unsigned short expected[] = {\n\t 248, 248, 240, 240, 249, 250, 243, 244, 250, 252, 246, 248, 251, 254, 249, 252,\n\t 252, 256, 252, 256, 253, 258, 255, 260, 254, 260, 258, 264, 255, 262, 261, 268,\n\t 256, 264, 264, 272, 257, 262, 267, 268, 258, 260, 270, 264, 259, 258, 273, 260,\n\t 260, 256, 276, 256, 261, 254, 279, 252, 262, 252, 282, 248, 263, 250, 285, 244, // clang-format :-/\n\t};\n\n\tconst unsigned char input[] = {\n\t 0xa1, 0x99, 0x99, 0x01, 0x2a, 0xaa, 0xaa, 0xaa, 0x02, 0x04, 0x44, 0x44, 0x44, 0x43, 0x33, 0x33,\n\t 0x33, 0x02, 0x06, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x02, 0x08, 0x88, 0x88, 0x88, 0x87,\n\t 0x77, 0x77, 0x77, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\n\t 0x00, 0xf8, 0x00, 0xf8, 0x00, 0xf0, 0x00, 0xf0, 0x00, 0x01, 0x01, // clang-format :-/\n\t};\n\n\tunsigned short decoded[sizeof(expected) / sizeof(expected[0])];\n\tassert(meshopt_decodeVertexBuffer(decoded, 16, 8, input, sizeof(input)) == 0);\n\tassert(memcmp(decoded, expected, sizeof(expected)) == 0);\n}\n\nstatic void encodeVertexMemorySafe()\n{\n\tconst size_t vertex_count = sizeof(kVertexBuffer) / sizeof(kVertexBuffer[0]);\n\n\tstd::vector buffer(meshopt_encodeVertexBufferBound(vertex_count, sizeof(PV)));\n\tbuffer.resize(meshopt_encodeVertexBuffer(&buffer[0], buffer.size(), kVertexBuffer, vertex_count, sizeof(PV)));\n\n\t// check that encode is memory-safe; note that we reallocate the buffer for each try to make sure ASAN can verify buffer access\n\tfor (size_t i = 0; i <= buffer.size(); ++i)\n\t{\n\t\tstd::vector shortbuffer(i);\n\t\tsize_t result = meshopt_encodeVertexBuffer(i == 0 ? NULL : &shortbuffer[0], i, kVertexBuffer, vertex_count, sizeof(PV));\n\n\t\tif (i == buffer.size())\n\t\t\tassert(result == buffer.size());\n\t\telse\n\t\t\tassert(result == 0);\n\t}\n}\n\nstatic void decodeVertexMemorySafe()\n{\n\tconst size_t vertex_count = sizeof(kVertexBuffer) / sizeof(kVertexBuffer[0]);\n\n\tstd::vector buffer(meshopt_encodeVertexBufferBound(vertex_count, sizeof(PV)));\n\tbuffer.resize(meshopt_encodeVertexBuffer(&buffer[0], buffer.size(), kVertexBuffer, vertex_count, sizeof(PV)));\n\n\t// check that decode is memory-safe; note that we reallocate the buffer for each try to make sure ASAN can verify buffer access\n\tPV decoded[vertex_count];\n\n\tfor (size_t i = 0; i <= buffer.size(); ++i)\n\t{\n\t\tstd::vector shortbuffer(buffer.begin(), buffer.begin() + i);\n\t\tint result = meshopt_decodeVertexBuffer(decoded, vertex_count, sizeof(PV), i == 0 ? NULL : &shortbuffer[0], i);\n\t\t(void)result;\n\n\t\tif (i == buffer.size())\n\t\t\tassert(result == 0);\n\t\telse\n\t\t\tassert(result < 0);\n\t}\n}\n\nstatic void decodeVertexRejectExtraBytes()\n{\n\tconst size_t vertex_count = sizeof(kVertexBuffer) / sizeof(kVertexBuffer[0]);\n\n\tstd::vector buffer(meshopt_encodeVertexBufferBound(vertex_count, sizeof(PV)));\n\tbuffer.resize(meshopt_encodeVertexBuffer(&buffer[0], buffer.size(), kVertexBuffer, vertex_count, sizeof(PV)));\n\n\t// check that decoder doesn't accept extra bytes after a valid stream\n\tstd::vector largebuffer(buffer);\n\tlargebuffer.push_back(0);\n\n\tPV decoded[vertex_count];\n\tassert(meshopt_decodeVertexBuffer(decoded, vertex_count, sizeof(PV), &largebuffer[0], largebuffer.size()) < 0);\n}\n\nstatic void decodeVertexRejectMalformedHeaders()\n{\n\tconst size_t vertex_count = sizeof(kVertexBuffer) / sizeof(kVertexBuffer[0]);\n\n\tstd::vector buffer(meshopt_encodeVertexBufferBound(vertex_count, sizeof(PV)));\n\tbuffer.resize(meshopt_encodeVertexBuffer(&buffer[0], buffer.size(), kVertexBuffer, vertex_count, sizeof(PV)));\n\n\t// check that decoder doesn't accept malformed headers\n\tstd::vector brokenbuffer(buffer);\n\tbrokenbuffer[0] = 0;\n\n\tPV decoded[vertex_count];\n\tassert(meshopt_decodeVertexBuffer(decoded, vertex_count, sizeof(PV), &brokenbuffer[0], brokenbuffer.size()) < 0);\n}\n\nstatic void decodeVertexBitGroups()\n{\n\tunsigned char data[16 * 4];\n\n\t// this tests 0/2/4/8 bit groups in one stream\n\tfor (size_t i = 0; i < 16; ++i)\n\t{\n\t\tdata[i * 4 + 0] = 0;\n\t\tdata[i * 4 + 1] = (unsigned char)(i * 1);\n\t\tdata[i * 4 + 2] = (unsigned char)(i * 2);\n\t\tdata[i * 4 + 3] = (unsigned char)(i * 8);\n\t}\n\n\tstd::vector buffer(meshopt_encodeVertexBufferBound(16, 4));\n\tbuffer.resize(meshopt_encodeVertexBuffer(&buffer[0], buffer.size(), data, 16, 4));\n\n\tunsigned char decoded[16 * 4];\n\tassert(meshopt_decodeVertexBuffer(decoded, 16, 4, &buffer[0], buffer.size()) == 0);\n\tassert(memcmp(decoded, data, sizeof(data)) == 0);\n}\n\nstatic void decodeVertexBitGroupSentinels()\n{\n\tunsigned char data[16 * 4];\n\n\t// this tests 0/2/4/8 bit groups and sentinels in one stream\n\tfor (size_t i = 0; i < 16; ++i)\n\t{\n\t\tif (i == 7 || i == 13)\n\t\t{\n\t\t\tdata[i * 4 + 0] = 42;\n\t\t\tdata[i * 4 + 1] = 42;\n\t\t\tdata[i * 4 + 2] = 42;\n\t\t\tdata[i * 4 + 3] = 42;\n\t\t}\n\t\telse\n\t\t{\n\t\t\tdata[i * 4 + 0] = 0;\n\t\t\tdata[i * 4 + 1] = (unsigned char)(i * 1);\n\t\t\tdata[i * 4 + 2] = (unsigned char)(i * 2);\n\t\t\tdata[i * 4 + 3] = (unsigned char)(i * 8);\n\t\t}\n\t}\n\n\tstd::vector buffer(meshopt_encodeVertexBufferBound(16, 4));\n\tbuffer.resize(meshopt_encodeVertexBuffer(&buffer[0], buffer.size(), data, 16, 4));\n\n\tunsigned char decoded[16 * 4];\n\tassert(meshopt_decodeVertexBuffer(decoded, 16, 4, &buffer[0], buffer.size()) == 0);\n\tassert(memcmp(decoded, data, sizeof(data)) == 0);\n}\n\nstatic void decodeVertexDeltas()\n{\n\tunsigned short data[16 * 4];\n\n\t// this forces wider deltas by using values that cross byte boundary\n\tfor (size_t i = 0; i < 16; ++i)\n\t{\n\t\tdata[i * 4 + 0] = (unsigned short)(0xf8 + i * 1);\n\t\tdata[i * 4 + 1] = (unsigned short)(0xf8 + (i < 8 ? i : 16 - i) * 2);\n\t\tdata[i * 4 + 2] = (unsigned short)(0xf0 + i * 3);\n\t\tdata[i * 4 + 3] = (unsigned short)(0xf0 + (i < 8 ? i : 16 - i) * 4);\n\t}\n\n\tstd::vector buffer(meshopt_encodeVertexBufferBound(16, 8));\n\tbuffer.resize(meshopt_encodeVertexBufferLevel(&buffer[0], buffer.size(), data, 16, 8, 2, -1));\n\n\tunsigned short decoded[16 * 4];\n\tassert(meshopt_decodeVertexBuffer(decoded, 16, 8, &buffer[0], buffer.size()) == 0);\n\tassert(memcmp(decoded, data, sizeof(data)) == 0);\n}\n\nstatic void decodeVertexBitXor()\n{\n\tunsigned int data[16 * 4];\n\n\t// this forces xors by using bit values at an offset\n\tfor (size_t i = 0; i < 16; ++i)\n\t{\n\t\tdata[i * 4 + 0] = unsigned(i << 0);\n\t\tdata[i * 4 + 1] = unsigned(i << 2);\n\t\tdata[i * 4 + 2] = unsigned(i << 15);\n\t\tdata[i * 4 + 3] = unsigned(i << 28);\n\t}\n\n\tstd::vector buffer(meshopt_encodeVertexBufferBound(16, 16));\n\tbuffer.resize(meshopt_encodeVertexBufferLevel(&buffer[0], buffer.size(), data, 16, 16, 3, -1));\n\n\tunsigned int decoded[16 * 4];\n\tassert(meshopt_decodeVertexBuffer(decoded, 16, 16, &buffer[0], buffer.size()) == 0);\n\tassert(memcmp(decoded, data, sizeof(data)) == 0);\n}\n\nstatic void decodeVertexLarge()\n{\n\tunsigned char data[128 * 4];\n\n\t// this tests 0/2/4/8 bit groups in one stream\n\tfor (size_t i = 0; i < 128; ++i)\n\t{\n\t\tdata[i * 4 + 0] = 0;\n\t\tdata[i * 4 + 1] = (unsigned char)(i * 1);\n\t\tdata[i * 4 + 2] = (unsigned char)(i * 2);\n\t\tdata[i * 4 + 3] = (unsigned char)(i * 8);\n\t}\n\n\tstd::vector buffer(meshopt_encodeVertexBufferBound(128, 4));\n\tbuffer.resize(meshopt_encodeVertexBuffer(&buffer[0], buffer.size(), data, 128, 4));\n\n\tunsigned char decoded[128 * 4];\n\tassert(meshopt_decodeVertexBuffer(decoded, 128, 4, &buffer[0], buffer.size()) == 0);\n\tassert(memcmp(decoded, data, sizeof(data)) == 0);\n}\n\nstatic void decodeVertexSmall()\n{\n\tunsigned char data[13 * 4];\n\n\t// this tests 0/2/4/8 bit groups in one stream\n\tfor (size_t i = 0; i < 13; ++i)\n\t{\n\t\tdata[i * 4 + 0] = 0;\n\t\tdata[i * 4 + 1] = (unsigned char)(i * 1);\n\t\tdata[i * 4 + 2] = (unsigned char)(i * 2);\n\t\tdata[i * 4 + 3] = (unsigned char)(i * 8);\n\t}\n\n\tstd::vector buffer(meshopt_encodeVertexBufferBound(13, 4));\n\tbuffer.resize(meshopt_encodeVertexBuffer(&buffer[0], buffer.size(), data, 13, 4));\n\n\tunsigned char decoded[13 * 4];\n\tassert(meshopt_decodeVertexBuffer(decoded, 13, 4, &buffer[0], buffer.size()) == 0);\n\tassert(memcmp(decoded, data, sizeof(data)) == 0);\n}\n\nstatic void encodeVertexEmpty()\n{\n\tstd::vector buffer(meshopt_encodeVertexBufferBound(0, 16));\n\tbuffer.resize(meshopt_encodeVertexBuffer(&buffer[0], buffer.size(), NULL, 0, 16));\n\n\tassert(meshopt_decodeVertexBuffer(NULL, 0, 16, &buffer[0], buffer.size()) == 0);\n}\n\nstatic void decodeVersion()\n{\n\tassert(meshopt_decodeVertexVersion(reinterpret_cast(\"\\xa0\"), 1) == 0);\n\tassert(meshopt_decodeVertexVersion(reinterpret_cast(\"\\xa1\"), 1) == 1);\n\tassert(meshopt_decodeVertexVersion(reinterpret_cast(\"\\xa1hello\"), 6) == 1);\n\n\tassert(meshopt_decodeVertexVersion(NULL, 0) == -1);\n\tassert(meshopt_decodeVertexVersion(reinterpret_cast(\"\\xa7\"), 1) == -1);\n\tassert(meshopt_decodeVertexVersion(reinterpret_cast(\"\\xb1\"), 1) == -1);\n\n\tassert(meshopt_decodeIndexVersion(reinterpret_cast(\"\\xe0\"), 1) == 0);\n\tassert(meshopt_decodeIndexVersion(reinterpret_cast(\"\\xd1\"), 1) == 1);\n\tassert(meshopt_decodeIndexVersion(reinterpret_cast(\"\\xe1hello\"), 6) == 1);\n\n\tassert(meshopt_decodeIndexVersion(NULL, 0) == -1);\n\tassert(meshopt_decodeIndexVersion(reinterpret_cast(\"\\xa7\"), 1) == -1);\n\tassert(meshopt_decodeIndexVersion(reinterpret_cast(\"\\xa1\"), 1) == -1);\n}\n\nstatic void decodeFilterOct8()\n{\n\tconst unsigned char data[4 * 4] = {\n\t 0, 1, 127, 0,\n\t 0, 187, 127, 1,\n\t 255, 1, 127, 0,\n\t 14, 130, 127, 1, // clang-format :-/\n\t};\n\n\tconst unsigned char expected[4 * 4] = {\n\t 0, 1, 127, 0,\n\t 0, 159, 82, 1,\n\t 255, 1, 127, 0,\n\t 1, 130, 241, 1, // clang-format :-/\n\t};\n\n\t// Aligned by 4\n\tunsigned char full[4 * 4];\n\tmemcpy(full, data, sizeof(full));\n\tmeshopt_decodeFilterOct(full, 4, 4);\n\tassert(memcmp(full, expected, sizeof(full)) == 0);\n\n\t// Tail processing for unaligned data\n\tunsigned char tail[3 * 4];\n\tmemcpy(tail, data, sizeof(tail));\n\tmeshopt_decodeFilterOct(tail, 3, 4);\n\tassert(memcmp(tail, expected, sizeof(tail)) == 0);\n}\n\nstatic void decodeFilterOct12()\n{\n\tconst unsigned short data[4 * 4] = {\n\t 0, 1, 2047, 0,\n\t 0, 1870, 2047, 1,\n\t 2017, 1, 2047, 0,\n\t 14, 1300, 2047, 1, // clang-format :-/\n\t};\n\n\tconst unsigned short expected[4 * 4] = {\n\t 0, 16, 32767, 0,\n\t 0, 32621, 3088, 1,\n\t 32764, 16, 471, 0,\n\t 307, 28541, 16093, 1, // clang-format :-/\n\t};\n\n\t// Aligned by 4\n\tunsigned short full[4 * 4];\n\tmemcpy(full, data, sizeof(full));\n\tmeshopt_decodeFilterOct(full, 4, 8);\n\tassert(memcmp(full, expected, sizeof(full)) == 0);\n\n\t// Tail processing for unaligned data\n\tunsigned short tail[3 * 4];\n\tmemcpy(tail, data, sizeof(tail));\n\tmeshopt_decodeFilterOct(tail, 3, 8);\n\tassert(memcmp(tail, expected, sizeof(tail)) == 0);\n}\n\nstatic void decodeFilterQuat12()\n{\n\tconst unsigned short data[4 * 4] = {\n\t 0, 1, 0, 0x7fc,\n\t 0, 1870, 0, 0x7fd,\n\t 2017, 1, 0, 0x7fe,\n\t 14, 1300, 0, 0x7ff, // clang-format :-/\n\t};\n\n\tconst unsigned short expected[4 * 4] = {\n\t 32767, 0, 11, 0,\n\t 0, 25013, 0, 21166,\n\t 11, 0, 23504, 22830,\n\t 158, 14715, 0, 29277, // clang-format :-/\n\t};\n\n\t// Aligned by 4\n\tunsigned short full[4 * 4];\n\tmemcpy(full, data, sizeof(full));\n\tmeshopt_decodeFilterQuat(full, 4, 8);\n\tassert(memcmp(full, expected, sizeof(full)) == 0);\n\n\t// Tail processing for unaligned data\n\tunsigned short tail[3 * 4];\n\tmemcpy(tail, data, sizeof(tail));\n\tmeshopt_decodeFilterQuat(tail, 3, 8);\n\tassert(memcmp(tail, expected, sizeof(tail)) == 0);\n}\n\nstatic void decodeFilterExp()\n{\n\tconst unsigned int data[4] = {\n\t 0,\n\t 0xff000003,\n\t 0x02fffff7,\n\t 0xfe7fffff, // clang-format :-/\n\t};\n\n\tconst unsigned int expected[4] = {\n\t 0,\n\t 0x3fc00000,\n\t 0xc2100000,\n\t 0x49fffffe, // clang-format :-/\n\t};\n\n\t// Aligned by 4\n\tunsigned int full[4];\n\tmemcpy(full, data, sizeof(full));\n\tmeshopt_decodeFilterExp(full, 4, 4);\n\tassert(memcmp(full, expected, sizeof(full)) == 0);\n\n\t// Tail processing for unaligned data\n\tunsigned int tail[3];\n\tmemcpy(tail, data, sizeof(tail));\n\tmeshopt_decodeFilterExp(tail, 3, 4);\n\tassert(memcmp(tail, expected, sizeof(tail)) == 0);\n}\n\nstatic void encodeFilterOct8()\n{\n\tconst float data[4 * 4] = {\n\t 1, 0, 0, 0,\n\t 0, -1, 0, 0,\n\t 0.7071068f, 0, 0.707168f, 1,\n\t -0.7071068f, 0, -0.707168f, 1, // clang-format :-/\n\t};\n\n\tconst unsigned char expected[4 * 4] = {\n\t 0x7f, 0, 0x7f, 0,\n\t 0, 0x81, 0x7f, 0,\n\t 0x3f, 0, 0x7f, 0x7f,\n\t 0x81, 0x40, 0x7f, 0x7f, // clang-format :-/\n\t};\n\n\tunsigned char encoded[4 * 4];\n\tmeshopt_encodeFilterOct(encoded, 4, 4, 8, data);\n\n\tassert(memcmp(encoded, expected, sizeof(expected)) == 0);\n\n\tsigned char decoded[4 * 4];\n\tmemcpy(decoded, encoded, sizeof(decoded));\n\tmeshopt_decodeFilterOct(decoded, 4, 4);\n\n\tfor (size_t i = 0; i < 4 * 4; ++i)\n\t\tassert(fabsf(decoded[i] / 127.f - data[i]) < 1e-2f);\n}\n\nstatic void encodeFilterOct12()\n{\n\tconst float data[4 * 4] = {\n\t 1, 0, 0, 0,\n\t 0, -1, 0, 0,\n\t 0.7071068f, 0, 0.707168f, 1,\n\t -0.7071068f, 0, -0.707168f, 1, // clang-format :-/\n\t};\n\n\tconst unsigned short expected[4 * 4] = {\n\t 0x7ff, 0, 0x7ff, 0,\n\t 0x0, 0xf801, 0x7ff, 0,\n\t 0x3ff, 0, 0x7ff, 0x7fff,\n\t 0xf801, 0x400, 0x7ff, 0x7fff, // clang-format :-/\n\t};\n\n\tunsigned short encoded[4 * 4];\n\tmeshopt_encodeFilterOct(encoded, 4, 8, 12, data);\n\n\tassert(memcmp(encoded, expected, sizeof(expected)) == 0);\n\n\tshort decoded[4 * 4];\n\tmemcpy(decoded, encoded, sizeof(decoded));\n\tmeshopt_decodeFilterOct(decoded, 4, 8);\n\n\tfor (size_t i = 0; i < 4 * 4; ++i)\n\t\tassert(fabsf(decoded[i] / 32767.f - data[i]) < 1e-3f);\n}\n\nstatic void encodeFilterQuat12()\n{\n\tconst float data[4 * 4] = {\n\t 1, 0, 0, 0,\n\t 0, -1, 0, 0,\n\t 0.7071068f, 0, 0, 0.707168f,\n\t -0.7071068f, 0, 0, -0.707168f, // clang-format :-/\n\t};\n\n\tconst unsigned short expected[4 * 4] = {\n\t 0, 0, 0, 0x7fc,\n\t 0, 0, 0, 0x7fd,\n\t 0x7ff, 0, 0, 0x7ff,\n\t 0x7ff, 0, 0, 0x7ff, // clang-format :-/\n\t};\n\n\tunsigned short encoded[4 * 4];\n\tmeshopt_encodeFilterQuat(encoded, 4, 8, 12, data);\n\n\tassert(memcmp(encoded, expected, sizeof(expected)) == 0);\n\n\tshort decoded[4 * 4];\n\tmemcpy(decoded, encoded, sizeof(decoded));\n\tmeshopt_decodeFilterQuat(decoded, 4, 8);\n\n\tfor (size_t i = 0; i < 4; ++i)\n\t{\n\t\tfloat dx = decoded[i * 4 + 0] / 32767.f;\n\t\tfloat dy = decoded[i * 4 + 1] / 32767.f;\n\t\tfloat dz = decoded[i * 4 + 2] / 32767.f;\n\t\tfloat dw = decoded[i * 4 + 3] / 32767.f;\n\n\t\tfloat dp =\n\t\t data[i * 4 + 0] * dx +\n\t\t data[i * 4 + 1] * dy +\n\t\t data[i * 4 + 2] * dz +\n\t\t data[i * 4 + 3] * dw;\n\n\t\tassert(fabsf(fabsf(dp) - 1.f) < 1e-4f);\n\t}\n}\n\nstatic void encodeFilterExp()\n{\n\tconst float data[4] = {\n\t 1,\n\t -23.4f,\n\t -0.1f,\n\t 11.0f,\n\t};\n\n\t// separate exponents: each component gets its own value\n\tconst unsigned int expected1[4] = {\n\t 0xf3002000,\n\t 0xf7ffd133,\n\t 0xefffcccd,\n\t 0xf6002c00,\n\t};\n\n\t// shared exponents (vector): all components of each vector get the same value\n\tconst unsigned int expected2[4] = {\n\t 0xf7000200,\n\t 0xf7ffd133,\n\t 0xf6ffff9a,\n\t 0xf6002c00,\n\t};\n\n\t// shared exponents (component): each component gets the same value across all vectors\n\tconst unsigned int expected3[4] = {\n\t 0xf3002000,\n\t 0xf7ffd133,\n\t 0xf3fffccd,\n\t 0xf7001600,\n\t};\n\n\tunsigned int encoded1[4];\n\tmeshopt_encodeFilterExp(encoded1, 2, 8, 15, data, meshopt_EncodeExpSeparate);\n\n\tunsigned int encoded2[4];\n\tmeshopt_encodeFilterExp(encoded2, 2, 8, 15, data, meshopt_EncodeExpSharedVector);\n\n\tunsigned int encoded3[4];\n\tmeshopt_encodeFilterExp(encoded3, 2, 8, 15, data, meshopt_EncodeExpSharedComponent);\n\n\tassert(memcmp(encoded1, expected1, sizeof(expected1)) == 0);\n\tassert(memcmp(encoded2, expected2, sizeof(expected2)) == 0);\n\tassert(memcmp(encoded3, expected3, sizeof(expected3)) == 0);\n\n\tfloat decoded1[4];\n\tmemcpy(decoded1, encoded1, sizeof(decoded1));\n\tmeshopt_decodeFilterExp(decoded1, 2, 8);\n\n\tfloat decoded2[4];\n\tmemcpy(decoded2, encoded2, sizeof(decoded2));\n\tmeshopt_decodeFilterExp(decoded2, 2, 8);\n\n\tfloat decoded3[4];\n\tmemcpy(decoded3, encoded3, sizeof(decoded3));\n\tmeshopt_decodeFilterExp(decoded3, 2, 8);\n\n\tfor (size_t i = 0; i < 4; ++i)\n\t{\n\t\tassert(fabsf(decoded1[i] - data[i]) < 1e-3f);\n\t\tassert(fabsf(decoded2[i] - data[i]) < 1e-3f);\n\t\tassert(fabsf(decoded3[i] - data[i]) < 1e-3f);\n\t}\n}\n\nstatic void encodeFilterExpZero()\n{\n\tconst float data[4] = {\n\t 0.f,\n\t -0.f,\n\t 1.1754944e-38f,\n\t -1.1754944e-38f,\n\t};\n\tconst unsigned int expected[4] = {\n\t 0xf2000000,\n\t 0xf2000000,\n\t 0x8e000000,\n\t 0x8e000000,\n\t};\n\n\tunsigned int encoded[4];\n\tmeshopt_encodeFilterExp(encoded, 4, 4, 15, data, meshopt_EncodeExpSeparate);\n\n\tassert(memcmp(encoded, expected, sizeof(expected)) == 0);\n\n\tfloat decoded[4];\n\tmemcpy(decoded, encoded, sizeof(decoded));\n\tmeshopt_decodeFilterExp(&decoded, 4, 4);\n\n\tfor (size_t i = 0; i < 4; ++i)\n\t\tassert(decoded[i] == 0);\n}\n\nstatic void encodeFilterExpAlias()\n{\n\tconst float data[4] = {\n\t 1,\n\t -23.4f,\n\t -0.1f,\n\t 11.0f,\n\t};\n\n\t// separate exponents: each component gets its own value\n\tconst unsigned int expected1[4] = {\n\t 0xf3002000,\n\t 0xf7ffd133,\n\t 0xefffcccd,\n\t 0xf6002c00,\n\t};\n\n\t// shared exponents (vector): all components of each vector get the same value\n\tconst unsigned int expected2[4] = {\n\t 0xf7000200,\n\t 0xf7ffd133,\n\t 0xf6ffff9a,\n\t 0xf6002c00,\n\t};\n\n\t// shared exponents (component): each component gets the same value across all vectors\n\tconst unsigned int expected3[4] = {\n\t 0xf3002000,\n\t 0xf7ffd133,\n\t 0xf3fffccd,\n\t 0xf7001600,\n\t};\n\n\tunsigned int encoded1[4];\n\tmemcpy(encoded1, data, sizeof(data));\n\tmeshopt_encodeFilterExp(encoded1, 2, 8, 15, reinterpret_cast(encoded1), meshopt_EncodeExpSeparate);\n\n\tunsigned int encoded2[4];\n\tmemcpy(encoded2, data, sizeof(data));\n\tmeshopt_encodeFilterExp(encoded2, 2, 8, 15, reinterpret_cast(encoded2), meshopt_EncodeExpSharedVector);\n\n\tunsigned int encoded3[4];\n\tmemcpy(encoded3, data, sizeof(data));\n\tmeshopt_encodeFilterExp(encoded3, 2, 8, 15, reinterpret_cast(encoded3), meshopt_EncodeExpSharedComponent);\n\n\tassert(memcmp(encoded1, expected1, sizeof(expected1)) == 0);\n\tassert(memcmp(encoded2, expected2, sizeof(expected2)) == 0);\n\tassert(memcmp(encoded3, expected3, sizeof(expected3)) == 0);\n}\n\nstatic void encodeFilterExpClamp()\n{\n\tconst float data[4] = {\n\t 1,\n\t -23.4f,\n\t -0.1f,\n\t 11.0f,\n\t};\n\n\t// separate exponents: each component gets its own value\n\t// note: third value is exponent clamped\n\tconst unsigned int expected[4] = {\n\t 0xf3002000,\n\t 0xf7ffd133,\n\t 0xf2fff99a,\n\t 0xf6002c00,\n\t};\n\n\tunsigned int encoded[4];\n\tmeshopt_encodeFilterExp(encoded, 2, 8, 15, data, meshopt_EncodeExpClamped);\n\n\tassert(memcmp(encoded, expected, sizeof(expected)) == 0);\n\n\tfloat decoded[4];\n\tmemcpy(decoded, encoded, sizeof(decoded));\n\tmeshopt_decodeFilterExp(decoded, 2, 8);\n\n\tfor (size_t i = 0; i < 4; ++i)\n\t\tassert(fabsf(decoded[i] - data[i]) < 1e-3f);\n}\n\nstatic void encodeFilterColor8()\n{\n\tconst float data[4 * 4] = {\n\t 1.0f, 0.0f, 0.0f, 1.0f,\n\t 0.0f, 1.0f, 0.0f, 0.5f,\n\t 0.0f, 0.0f, 1.0f, 0.25f,\n\t 0.4f, 0.4f, 0.4f, 0.75f, // clang-format :-/\n\t};\n\n\tconst unsigned char expected[4 * 4] = {\n\t 0x40, 0x7f, 0xc1, 0xff,\n\t 0x7f, 0x00, 0x7f, 0xc0,\n\t 0x40, 0x81, 0xc0, 0xa0,\n\t 0x66, 0x00, 0x00, 0xdf, // clang-format :-/\n\t};\n\n\tunsigned char encoded[4 * 4];\n\tmeshopt_encodeFilterColor(encoded, 4, 4, 8, data);\n\n\tassert(memcmp(encoded, expected, sizeof(expected)) == 0);\n\n\tunsigned char decoded[4 * 4];\n\tmemcpy(decoded, encoded, sizeof(decoded));\n\tmeshopt_decodeFilterColor(decoded, 4, 4);\n\n\tfor (size_t i = 0; i < 4 * 4; ++i)\n\t\tassert(fabsf(decoded[i] / 255.f - data[i]) < 1e-2f);\n\n\t// ensure grayscale is preserved\n\tassert(decoded[12] == decoded[13] && decoded[12] == decoded[14]);\n}\n\nstatic void encodeFilterColor12()\n{\n\tconst float data[4 * 4] = {\n\t 1.0f, 0.0f, 0.0f, 1.0f,\n\t 0.0f, 1.0f, 0.0f, 0.5f,\n\t 0.0f, 0.0f, 1.0f, 0.25f,\n\t 0.4f, 0.4f, 0.4f, 0.75f, // clang-format :-/\n\t};\n\n\tconst unsigned short expected[4 * 4] = {\n\t 0x0400, 0x07ff, 0xfc01, 0x0fff,\n\t 0x07ff, 0x0000, 0x07ff, 0x0c00,\n\t 0x0400, 0xf801, 0xfc00, 0x0a00,\n\t 0x0666, 0x0000, 0x0000, 0x0dff, // clang-format :-/\n\t};\n\n\tunsigned short encoded[4 * 4];\n\tmeshopt_encodeFilterColor(encoded, 4, 8, 12, data);\n\n\tassert(memcmp(encoded, expected, sizeof(expected)) == 0);\n\n\tunsigned short decoded[4 * 4];\n\tmemcpy(decoded, encoded, sizeof(decoded));\n\tmeshopt_decodeFilterColor(decoded, 4, 8);\n\n\tfor (size_t i = 0; i < 4 * 4; ++i)\n\t\tassert(fabsf(decoded[i] / 65535.f - data[i]) < 1e-3f);\n\n\t// ensure grayscale is preserved\n\tassert(decoded[12] == decoded[13] && decoded[12] == decoded[14]);\n}\n\nstatic void clusterBoundsDegenerate()\n{\n\tconst float vbd[] = {0, 0, 0, 0, 0, 0, 0, 0, 0};\n\tconst unsigned int ibd[] = {0, 0, 0};\n\tconst unsigned int ib1[] = {0, 1, 2};\n\n\t// all of the bounds below are degenerate as they use 0 triangles, one topology-degenerate triangle and one position-degenerate triangle respectively\n\tmeshopt_Bounds bounds0 = meshopt_computeClusterBounds(NULL, 0, NULL, 0, 12);\n\tmeshopt_Bounds boundsd = meshopt_computeClusterBounds(ibd, 3, vbd, 3, 12);\n\tmeshopt_Bounds bounds1 = meshopt_computeClusterBounds(ib1, 3, vbd, 3, 12);\n\n\tassert(bounds0.center[0] == 0 && bounds0.center[1] == 0 && bounds0.center[2] == 0 && bounds0.radius == 0);\n\tassert(boundsd.center[0] == 0 && boundsd.center[1] == 0 && boundsd.center[2] == 0 && boundsd.radius == 0);\n\tassert(bounds1.center[0] == 0 && bounds1.center[1] == 0 && bounds1.center[2] == 0 && bounds1.radius == 0);\n\n\tconst float vb1[] = {1, 0, 0, 0, 1, 0, 0, 0, 1};\n\tconst unsigned int ib2[] = {0, 1, 2, 0, 2, 1};\n\n\t// these bounds have a degenerate cone since the cluster has two triangles with opposite normals\n\tmeshopt_Bounds bounds2 = meshopt_computeClusterBounds(ib2, 6, vb1, 3, 12);\n\n\tassert(bounds2.cone_apex[0] == 0 && bounds2.cone_apex[1] == 0 && bounds2.cone_apex[2] == 0);\n\tassert(bounds2.cone_axis[0] == 0 && bounds2.cone_axis[1] == 0 && bounds2.cone_axis[2] == 0);\n\tassert(bounds2.cone_cutoff == 1);\n\tassert(bounds2.cone_axis_s8[0] == 0 && bounds2.cone_axis_s8[1] == 0 && bounds2.cone_axis_s8[2] == 0);\n\tassert(bounds2.cone_cutoff_s8 == 127);\n\n\t// however, the bounding sphere needs to be in tact (here we only check bbox for simplicity)\n\tassert(bounds2.center[0] - bounds2.radius <= 0 && bounds2.center[0] + bounds2.radius >= 1);\n\tassert(bounds2.center[1] - bounds2.radius <= 0 && bounds2.center[1] + bounds2.radius >= 1);\n\tassert(bounds2.center[2] - bounds2.radius <= 0 && bounds2.center[2] + bounds2.radius >= 1);\n}\n\nstatic void sphereBounds()\n{\n\tconst float vbr[] = {\n\t 0, 0, 0, 0,\n\t 0, 1, 0, 1,\n\t 0, 0, 1, 2,\n\t 1, 0, 1, 3, // clang-format\n\t};\n\n\t// without the radius, the center is inside the tetrahedron\n\tmeshopt_Bounds bounds = meshopt_computeSphereBounds(vbr, 4, sizeof(float) * 4, NULL, 0);\n\tassert(fabsf(bounds.center[0] - 0.5f) < 1e-2f);\n\tassert(fabsf(bounds.center[1] - 0.5f) < 1e-2f);\n\tassert(fabsf(bounds.center[2] - 0.5f) < 1e-2f);\n\tassert(bounds.radius < 0.87f);\n\n\t// when using the radius, the last sphere envelops the entire set\n\tmeshopt_Bounds boundsr = meshopt_computeSphereBounds(vbr, 4, sizeof(float) * 4, vbr + 3, sizeof(float) * 4);\n\tassert(fabsf(boundsr.center[0] - 1.f) < 1e-2f);\n\tassert(fabsf(boundsr.center[1] - 0.f) < 1e-2f);\n\tassert(fabsf(boundsr.center[2] - 1.f) < 1e-2f);\n\tassert(fabsf(boundsr.radius - 3.f) < 1e-2f);\n}\n\nstatic void meshletsEmpty()\n{\n\tconst float vbd[4 * 3] = {};\n\n\tmeshopt_Meshlet ml[1];\n\tunsigned int mv[4];\n\tunsigned char mt[8];\n\tsize_t mc = meshopt_buildMeshlets(ml, mv, mt, NULL, 0, vbd, 4, sizeof(float) * 3, 64, 64, 0.f);\n\tassert(mc == 0);\n}\n\nstatic void meshletsDense()\n{\n\tconst float vbd[4 * 3] = {};\n\tconst unsigned int ibd[6] = {0, 2, 1, 1, 2, 3};\n\n\tmeshopt_Meshlet ml[1];\n\tunsigned int mv[4];\n\tunsigned char mt[8];\n\tsize_t mc = meshopt_buildMeshlets(ml, mv, mt, ibd, 6, vbd, 4, sizeof(float) * 3, 64, 64, 0.f);\n\n\tassert(mc == 1);\n\tassert(ml[0].triangle_count == 2);\n\tassert(ml[0].vertex_count == 4);\n\n\tunsigned int tri0[3] = {mv[mt[0]], mv[mt[1]], mv[mt[2]]};\n\tunsigned int tri1[3] = {mv[mt[3]], mv[mt[4]], mv[mt[5]]};\n\n\t// technically triangles could also be flipped in the meshlet but for now just assume they aren't\n\tassert(memcmp(tri0, ibd + 0, 3 * sizeof(unsigned int)) == 0);\n\tassert(memcmp(tri1, ibd + 3, 3 * sizeof(unsigned int)) == 0);\n}\n\nstatic void meshletsSparse()\n{\n\tconst float vbd[16 * 3] = {};\n\tconst unsigned int ibd[6] = {0, 7, 15, 15, 7, 3};\n\n\tmeshopt_Meshlet ml[1];\n\tunsigned int mv[4];\n\tunsigned char mt[8];\n\tsize_t mc = meshopt_buildMeshlets(ml, mv, mt, ibd, 6, vbd, 16, sizeof(float) * 3, 64, 64, 0.f);\n\n\tassert(mc == 1);\n\tassert(ml[0].triangle_count == 2);\n\tassert(ml[0].vertex_count == 4);\n\n\tunsigned int tri0[3] = {mv[mt[0]], mv[mt[1]], mv[mt[2]]};\n\tunsigned int tri1[3] = {mv[mt[3]], mv[mt[4]], mv[mt[5]]};\n\n\t// technically triangles could also be flipped in the meshlet but for now just assume they aren't\n\tassert(memcmp(tri0, ibd + 0, 3 * sizeof(unsigned int)) == 0);\n\tassert(memcmp(tri1, ibd + 3, 3 * sizeof(unsigned int)) == 0);\n}\n\nstatic void meshletsFlex()\n{\n\t// two tetrahedrons far apart\n\tfloat vb[2 * 4 * 3] = {\n\t 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1,\n\t 10, 0, 0, 11, 0, 0, 10, 1, 0, 10, 0, 1, // clang-format :-/\n\t};\n\n\tunsigned int ib[2 * 4 * 3] = {\n\t 0, 1, 2, 0, 2, 3, 0, 3, 1, 1, 3, 2,\n\t 4, 5, 6, 4, 6, 7, 4, 7, 5, 5, 7, 6, // clang-format :-/\n\t};\n\n\t// up to 2 meshlets with min_triangles=4\n\tassert(meshopt_buildMeshletsBound(2 * 4 * 3, 16, 4) == 2);\n\n\tmeshopt_Meshlet ml[2];\n\tunsigned int mv[2 * 16];\n\tunsigned char mt[2 * 8 * 3]; // 2 meshlets with up to 8 triangles\n\n\t// with regular function, we should get one meshlet (maxt=8) or two (maxt=4)\n\tassert(meshopt_buildMeshlets(ml, mv, mt, ib, sizeof(ib) / sizeof(ib[0]), vb, 8, sizeof(float) * 3, 16, 8, 0.f) == 1);\n\tassert(ml[0].triangle_count == 8);\n\tassert(ml[0].vertex_count == 8);\n\n\tassert(meshopt_buildMeshlets(ml, mv, mt, ib, sizeof(ib) / sizeof(ib[0]), vb, 8, sizeof(float) * 3, 16, 4, 0.f) == 2);\n\tassert(ml[0].triangle_count == 4);\n\tassert(ml[0].vertex_count == 4);\n\tassert(ml[1].triangle_count == 4);\n\tassert(ml[1].vertex_count == 4);\n\n\t// with flex function and mint=4 maxt=8 we should get one meshlet if split_factor is zero, or large enough to accomodate both\n\tassert(meshopt_buildMeshletsFlex(ml, mv, mt, ib, sizeof(ib) / sizeof(ib[0]), vb, 8, sizeof(float) * 3, 16, 4, 8, 0.f, 0.f) == 1);\n\tassert(ml[0].triangle_count == 8);\n\tassert(ml[0].vertex_count == 8);\n\n\tassert(meshopt_buildMeshletsFlex(ml, mv, mt, ib, sizeof(ib) / sizeof(ib[0]), vb, 8, sizeof(float) * 3, 16, 4, 8, 0.f, 10.f) == 1);\n\tassert(ml[0].triangle_count == 8);\n\tassert(ml[0].vertex_count == 8);\n\n\t// however, with a smaller split factor we should get two meshlets\n\tassert(meshopt_buildMeshletsFlex(ml, mv, mt, ib, sizeof(ib) / sizeof(ib[0]), vb, 8, sizeof(float) * 3, 16, 4, 8, 0.f, 1.f) == 2);\n\tassert(ml[0].triangle_count == 4);\n\tassert(ml[0].vertex_count == 4);\n\tassert(ml[1].triangle_count == 4);\n\tassert(ml[1].vertex_count == 4);\n}\n\nstatic void meshletsMax()\n{\n\tfloat vb[16 * 16 * 3];\n\tunsigned int ib[15 * 15 * 2 * 3];\n\n\t// 16x16 grid of vertices, 15x15 grid of triangles\n\tfor (int y = 0; y < 16; ++y)\n\t\tfor (int x = 0; x < 16; ++x)\n\t\t{\n\t\t\tvb[(y * 16 + x) * 3 + 0] = float(x);\n\t\t\tvb[(y * 16 + x) * 3 + 1] = float(y);\n\t\t\tvb[(y * 16 + x) * 3 + 2] = 0;\n\t\t}\n\n\tfor (int y = 0; y < 15; ++y)\n\t\tfor (int x = 0; x < 15; ++x)\n\t\t{\n\t\t\tib[(y * 15 + x) * 2 * 3 + 0] = (y + 0) * 16 + (x + 0);\n\t\t\tib[(y * 15 + x) * 2 * 3 + 1] = (y + 0) * 16 + (x + 1);\n\t\t\tib[(y * 15 + x) * 2 * 3 + 2] = (y + 1) * 16 + (x + 0);\n\t\t\tib[(y * 15 + x) * 2 * 3 + 3] = (y + 1) * 16 + (x + 0);\n\t\t\tib[(y * 15 + x) * 2 * 3 + 4] = (y + 0) * 16 + (x + 1);\n\t\t\tib[(y * 15 + x) * 2 * 3 + 5] = (y + 1) * 16 + (x + 1);\n\t\t}\n\n\tmeshopt_Meshlet ml[1];\n\tunsigned int mv[16 * 16];\n\tunsigned char mt[15 * 15 * 2 * 3 + 3];\n\n\tsize_t mc = meshopt_buildMeshlets(ml, mv, mt, ib, sizeof(ib) / sizeof(ib[0]), vb, 16 * 16, sizeof(float) * 3, 256, 512, 0.f);\n\tassert(mc == 1);\n\tassert(ml[0].triangle_count == 450);\n\tassert(ml[0].vertex_count == 256);\n\n\tmeshopt_optimizeMeshlet(mv, mt, ml[0].triangle_count, ml[0].vertex_count);\n\n\t// check sequential ordering of remapped indices\n\tint vmax = -1;\n\n\tfor (size_t i = 0; i < 450 * 3; ++i)\n\t{\n\t\tassert(mt[i] <= vmax + 1);\n\t\tvmax = vmax < mt[i] ? mt[i] : vmax;\n\t}\n}\n\nstatic void extractMeshlet()\n{\n\t// 15 and 1039 collide in low 10 bits\n\tconst unsigned int indices[] = {0, 7, 15, 1039, 7, 15};\n\n\tunsigned int vertices[4];\n\tunsigned char triangles[6];\n\tsize_t unique = meshopt_extractMeshletIndices(vertices, triangles, indices, 6);\n\tassert(unique == 4);\n\n\t// verify the invariant: vertices[triangles[i]] == indices[i]\n\tfor (size_t i = 0; i < 6; ++i)\n\t\tassert(vertices[triangles[i]] == indices[i]);\n\n\tassert(vertices[0] == 0 && vertices[1] == 7 && vertices[2] == 15 && vertices[3] == 1039);\n\tassert(triangles[0] == 0 && triangles[1] == 1 && triangles[2] == 2 && triangles[3] == 3 && triangles[4] == 1 && triangles[5] == 2);\n}\n\nstatic void meshletsSpatial()\n{\n\t// two tetrahedrons far apart\n\tfloat vb[2 * 4 * 3] = {\n\t 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1,\n\t 10, 0, 0, 11, 0, 0, 10, 1, 0, 10, 0, 1, // clang-format :-/\n\t};\n\n\tunsigned int ib[2 * 4 * 3] = {\n\t 0, 1, 2, 0, 2, 3, 0, 3, 1, 1, 3, 2,\n\t 4, 5, 6, 4, 6, 7, 4, 7, 5, 5, 7, 6, // clang-format :-/\n\t};\n\n\t// up to 2 meshlets with min_triangles=4\n\tassert(meshopt_buildMeshletsBound(2 * 4 * 3, 16, 4) == 2);\n\n\tmeshopt_Meshlet ml[2];\n\tunsigned int mv[2 * 16];\n\tunsigned char mt[2 * 8 * 3]; // 2 meshlets with up to 8 triangles\n\n\t// with strict limits, we should get one meshlet (maxt=8) or two (maxt=4)\n\tassert(meshopt_buildMeshletsSpatial(ml, mv, mt, ib, sizeof(ib) / sizeof(ib[0]), vb, 8, sizeof(float) * 3, 16, 8, 8, 0.f) == 1);\n\tassert(ml[0].triangle_count == 8);\n\tassert(ml[0].vertex_count == 8);\n\n\tassert(meshopt_buildMeshletsSpatial(ml, mv, mt, ib, sizeof(ib) / sizeof(ib[0]), vb, 8, sizeof(float) * 3, 16, 4, 4, 0.f) == 2);\n\tassert(ml[0].triangle_count == 4);\n\tassert(ml[0].vertex_count == 4);\n\tassert(ml[1].triangle_count == 4);\n\tassert(ml[1].vertex_count == 4);\n\n\t// with maxv=4 we should get two meshlets since we can't accomodate both\n\tassert(meshopt_buildMeshletsSpatial(ml, mv, mt, ib, sizeof(ib) / sizeof(ib[0]), vb, 8, sizeof(float) * 3, 4, 4, 8, 0.f) == 2);\n\tassert(ml[0].triangle_count == 4);\n\tassert(ml[0].vertex_count == 4);\n\tassert(ml[1].triangle_count == 4);\n\tassert(ml[1].vertex_count == 4);\n}\n\nstatic void meshletsSpatialDeep()\n{\n\tconst int N = 400;\n\tconst size_t max_vertices = 4;\n\tconst size_t max_triangles = 4;\n\n\tfloat vb[(N + 1) * 3];\n\tunsigned int ib[N * 3];\n\n\tvb[0] = vb[1] = vb[2] = 0;\n\n\tfor (size_t i = 0; i < N; ++i)\n\t{\n\t\tvb[(i + 1) * 3 + 0] = vb[(i + 1) * 3 + 1] = vb[(i + 1) * 3 + 2] = powf(1.2f, float(i));\n\n\t\tib[i * 3 + 0] = 0;\n\t\tib[i * 3 + 1] = ib[i * 3 + 2] = unsigned(i + 1);\n\t}\n\n\tsize_t max_meshlets = meshopt_buildMeshletsBound(N * 3, max_vertices, max_triangles);\n\tstd::vector meshlets(max_meshlets);\n\tstd::vector meshlet_vertices(N * 3);\n\tstd::vector meshlet_triangles(N * 3);\n\n\tsize_t result = meshopt_buildMeshletsSpatial(&meshlets[0], &meshlet_vertices[0], &meshlet_triangles[0], &ib[0], N * 3, &vb[0], N + 1, sizeof(float) * 3, max_vertices, max_triangles, max_triangles, 0.f);\n\tassert(result == N);\n}\n\nstatic void partitionBasic()\n{\n\t// 0 1 2\n\t// 3\n\t// 4 5 6 7 8\n\t// 9\n\t// 10 11 12\n\tconst unsigned int ci[] = {\n\t 0, 1, 3, 4, 5, 6,\n\t 1, 2, 3, 6, 7, 8,\n\t 4, 5, 6, 9, 10, 11,\n\t 6, 7, 8, 9, 11, 12, // clang-format :-/\n\t};\n\n\tconst unsigned int cc[4] = {6, 6, 6, 6};\n\tunsigned int part[4];\n\n\tassert(meshopt_partitionClusters(part, ci, sizeof(ci) / sizeof(ci[0]), cc, 4, NULL, 13, 0, 1) == 4);\n\tassert(part[0] == 0 && part[1] == 1 && part[2] == 2 && part[3] == 3);\n\n\tassert(meshopt_partitionClusters(part, ci, sizeof(ci) / sizeof(ci[0]), cc, 4, NULL, 13, 0, 2) == 2);\n\tassert(part[0] == 0 && part[1] == 0 && part[2] == 1 && part[3] == 1);\n\n\tassert(meshopt_partitionClusters(part, ci, sizeof(ci) / sizeof(ci[0]), cc, 4, NULL, 13, 0, 4) == 1);\n\tassert(part[0] == 0 && part[1] == 0 && part[2] == 0 && part[3] == 0);\n}\n\nstatic void partitionSpatial()\n{\n\tconst unsigned int ci[] = {\n\t 0, 1, 2,\n\t 0, 3, 4,\n\t 0, 5, 6, // clang-format :-/\n\t};\n\n\tconst float vb[] = {\n\t 0, 0, 0,\n\t 1, 0, 0, 0, 1, 0,\n\t 0, 2, 0, 2, 0, 0,\n\t -1, 0, 0, 0, -1, 0, // clang-format :-/\n\t};\n\n\tconst unsigned int cc[3] = {3, 3, 3};\n\tunsigned int part[3];\n\n\tassert(meshopt_partitionClusters(part, ci, sizeof(ci) / sizeof(ci[0]), cc, 3, NULL, 7, 0, 2) == 2);\n\tassert(part[0] == 0 && part[1] == 0 && part[2] == 1);\n\n\tassert(meshopt_partitionClusters(part, ci, sizeof(ci) / sizeof(ci[0]), cc, 3, vb, 7, sizeof(float) * 3, 2) == 2);\n\tassert(part[0] == 0 && part[1] == 1 && part[2] == 0);\n}\n\nstatic void partitionSpatialMerge()\n{\n\tconst unsigned int ci[] = {\n\t 0, 1, 2,\n\t 3, 4, 5,\n\t 6, 7, 8, // clang-format :-/\n\t};\n\n\tconst float vb[] = {\n\t 0, 0, 0, 1, 0, 0, 0, 1, 0,\n\t 0, 0, 0, 0, 2, 0, 2, 0, 0,\n\t 10, 0, 0, 10, 1, 0, 10, 2, 0, // clang-format :-/\n\t};\n\n\tconst unsigned int cc[3] = {3, 3, 3};\n\tunsigned int part[3];\n\n\tassert(meshopt_partitionClusters(part, ci, sizeof(ci) / sizeof(ci[0]), cc, 3, NULL, 9, 0, 2) == 3);\n\tassert(part[0] == 0 && part[1] == 1 && part[2] == 2);\n\n\tassert(meshopt_partitionClusters(part, ci, sizeof(ci) / sizeof(ci[0]), cc, 3, vb, 9, sizeof(float) * 3, 2) == 2);\n\tassert(part[0] == 0 && part[1] == 0 && part[2] == 1);\n}\n\nstatic int remapCustomFalse(void*, unsigned int, unsigned int)\n{\n\treturn 0;\n}\n\nstatic int remapCustomTrue(void*, unsigned int, unsigned int)\n{\n\treturn 1;\n}\n\nstatic void remapCustom()\n{\n\tconst float vb[] = {\n\t 0, 0, 0,\n\t 1, 0, 0,\n\t 0, 1, 0,\n\t 0, 0, 1,\n\t 1, 0, 0,\n\t 0, -0.f, 1, // clang-format\n\t};\n\n\tunsigned int remap[6];\n\tsize_t res;\n\n\tres = meshopt_generateVertexRemapCustom(remap, NULL, 6, vb, 6, sizeof(float) * 3, NULL, NULL);\n\tassert(res == 4);\n\tfor (int i = 0; i < 4; ++i)\n\t\tassert(remap[i] == unsigned(i));\n\tassert(remap[4] == 1);\n\tassert(remap[5] == 3);\n\n\tres = meshopt_generateVertexRemapCustom(remap, NULL, 6, vb, 6, sizeof(float) * 3, remapCustomTrue, NULL);\n\tassert(res == 4);\n\tfor (int i = 0; i < 4; ++i)\n\t\tassert(remap[i] == unsigned(i));\n\tassert(remap[4] == 1);\n\tassert(remap[5] == 3);\n\n\tres = meshopt_generateVertexRemapCustom(remap, NULL, 6, vb, 6, sizeof(float) * 3, remapCustomFalse, NULL);\n\tassert(res == 6);\n\tfor (int i = 0; i < 6; ++i)\n\t\tassert(remap[i] == unsigned(i));\n}\n\nstatic size_t allocCount;\nstatic size_t freeCount;\n\nstatic void* customAlloc(size_t size)\n{\n\tallocCount++;\n\n\treturn malloc(size);\n}\n\nstatic void customFree(void* ptr)\n{\n\tfreeCount++;\n\n\tfree(ptr);\n}\n\nstatic void customAllocator()\n{\n\tmeshopt_setAllocator(customAlloc, customFree);\n\n\tassert(allocCount == 0 && freeCount == 0);\n\n\tfloat vb[] = {1, 0, 0, 0, 1, 0, 0, 0, 1};\n\tunsigned int ib[] = {0, 1, 2};\n\tunsigned short ibs[] = {0, 1, 2};\n\n\t// meshopt_computeClusterBounds doesn't allocate\n\tmeshopt_computeClusterBounds(ib, 3, vb, 3, 12);\n\tassert(allocCount == 0 && freeCount == 0);\n\n\t// ... unless IndexAdapter is used\n\tmeshopt_computeClusterBounds(ibs, 3, vb, 3, 12);\n\tassert(allocCount == 1 && freeCount == 1);\n\n\t// meshopt_optimizeVertexFetch allocates internal remap table and temporary storage for in-place remaps\n\tmeshopt_optimizeVertexFetch(vb, ib, 3, vb, 3, 12);\n\tassert(allocCount == 3 && freeCount == 3);\n\n\t// ... plus one for IndexAdapter\n\tmeshopt_optimizeVertexFetch(vb, ibs, 3, vb, 3, 12);\n\tassert(allocCount == 6 && freeCount == 6);\n\n\tmeshopt_setAllocator(operator new, operator delete);\n\n\t// customAlloc & customFree should not get called anymore\n\tmeshopt_optimizeVertexFetch(vb, ib, 3, vb, 3, 12);\n\tassert(allocCount == 6 && freeCount == 6);\n\n\tallocCount = freeCount = 0;\n}\n\nstatic void emptyMesh()\n{\n\tmeshopt_optimizeVertexCache(NULL, NULL, 0, 0);\n\tmeshopt_optimizeVertexCacheFifo(NULL, NULL, 0, 0, 16);\n\tmeshopt_optimizeOverdraw(NULL, NULL, 0, NULL, 0, 12, 1.f);\n}\n\nstatic void simplify()\n{\n\t// 0\n\t// 1 2\n\t// 3 4 5\n\tunsigned int ib[] = {\n\t 0, 2, 1,\n\t 1, 2, 3,\n\t 3, 2, 4,\n\t 2, 5, 4, // clang-format :-/\n\t};\n\n\tfloat vb[] = {\n\t 0, 4, 0,\n\t 0, 1, 0,\n\t 2, 2, 0,\n\t 0, 0, 0,\n\t 1, 0, 0,\n\t 4, 0, 0, // clang-format :-/\n\t};\n\n\tunsigned int expected[] = {\n\t 0,\n\t 5,\n\t 3,\n\t};\n\n\tfloat error;\n\tassert(meshopt_simplify(ib, ib, 12, vb, 6, 12, 3, 1e-2f, 0, &error) == 3);\n\tassert(error < 1e-4f);\n\tassert(memcmp(ib, expected, sizeof(expected)) == 0);\n}\n\nstatic void simplifyStuck()\n{\n\t// tetrahedron can't be simplified due to collapse error restrictions\n\tfloat vb1[] = {0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1};\n\tunsigned int ib1[] = {0, 1, 2, 0, 2, 3, 0, 3, 1, 2, 1, 3};\n\n\tassert(meshopt_simplify(ib1, ib1, 12, vb1, 4, 12, 6, 1e-3f) == 12);\n\n\t// 5-vertex strip can't be simplified due to topology restriction since middle triangle has flipped winding\n\tfloat vb2[] = {0, 0, 0, 1, 0, 0, 2, 0, 0, 0.5f, 1, 0, 1.5f, 1, 0};\n\tunsigned int ib2[] = {0, 1, 3, 3, 1, 4, 1, 2, 4}; // ok\n\tunsigned int ib3[] = {0, 1, 3, 1, 3, 4, 1, 2, 4}; // flipped\n\n\tassert(meshopt_simplify(ib2, ib2, 9, vb2, 5, 12, 6, 1e-3f) == 6);\n\tassert(meshopt_simplify(ib3, ib3, 9, vb2, 5, 12, 6, 1e-3f) == 9);\n\n\t// 4-vertex quad with a locked corner can't be simplified due to border error-induced restriction\n\tfloat vb4[] = {0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 1, 0};\n\tunsigned int ib4[] = {0, 1, 3, 0, 3, 2};\n\n\tassert(meshopt_simplify(ib4, ib4, 6, vb4, 4, 12, 3, 1e-3f) == 6);\n\n\t// 4-vertex quad with a locked corner can't be simplified due to border error-induced restriction\n\tfloat vb5[] = {0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0};\n\tunsigned int ib5[] = {0, 1, 4, 0, 3, 2};\n\n\tassert(meshopt_simplify(ib5, ib5, 6, vb5, 5, 12, 3, 1e-3f) == 6);\n}\n\nstatic void simplifySloppyStuck()\n{\n\tconst float vb[] = {0, 0, 0, 0, 0, 0, 0, 0, 0};\n\tconst unsigned int ib[] = {0, 1, 2, 0, 1, 2};\n\n\tunsigned int* target = NULL;\n\n\t// simplifying down to 0 triangles results in 0 immediately\n\tassert(meshopt_simplifySloppy(target, ib, 3, vb, 3, 12, 0, 0.f) == 0);\n\n\t// simplifying down to 2 triangles given that all triangles are degenerate results in 0 as well\n\tassert(meshopt_simplifySloppy(target, ib, 6, vb, 3, 12, 6, 0.f) == 0);\n}\n\nstatic void simplifySloppyLocks()\n{\n\t// 0\n\t// 1 2\n\t// 3 4 5\n\tunsigned int ib[] = {\n\t 0, 2, 1,\n\t 1, 2, 3,\n\t 3, 2, 4,\n\t 2, 5, 4, // clang-format :-/\n\t};\n\n\tfloat vb[] = {\n\t 0, 4, 0,\n\t 0, 1, 0,\n\t 2, 2, 0,\n\t 0, 0, 0,\n\t 1, 0, 0,\n\t 4, 0, 0, // clang-format :-/\n\t};\n\n\t// lock spine\n\tunsigned char locks[] = {1, 0, 1, 0, 0, 1};\n\n\tunsigned int expected[] = {\n\t 0,\n\t 2,\n\t 1,\n\t 1,\n\t 2,\n\t 5,\n\t};\n\n\tfloat error;\n\tassert(meshopt_simplifySloppy(ib, ib, 12, vb, 6, 12, locks, 3, 1.f, &error) == 6);\n\tassert(error == 0.f);\n\tassert(memcmp(ib, expected, sizeof(expected)) == 0);\n}\n\nstatic void simplifyPointsStuck()\n{\n\tconst float vb[] = {0, 0, 0, 0, 0, 0, 0, 0, 0};\n\n\t// simplifying down to 0 points results in 0 immediately\n\tassert(meshopt_simplifyPoints(NULL, vb, 3, 12, NULL, 0, 0, 0) == 0);\n}\n\nstatic void simplifyFlip()\n{\n\t// this mesh has been constructed by taking a tessellated irregular grid with a square cutout\n\t// and progressively collapsing edges until the only ones left violate border or flip constraints.\n\t// there is only one valid non-flip collapse, so we validate that we take it; when flips are allowed,\n\t// the wrong collapse is picked instead.\n\tfloat vb[] = {\n\t 1.000000f, 1.000000f, -1.000000f,\n\t 1.000000f, 1.000000f, 1.000000f,\n\t 1.000000f, -1.000000f, 1.000000f,\n\t 1.000000f, -0.200000f, -0.200000f,\n\t 1.000000f, 0.200000f, -0.200000f,\n\t 1.000000f, -0.200000f, 0.200000f,\n\t 1.000000f, 0.200000f, 0.200000f,\n\t 1.000000f, 0.500000f, -0.500000f,\n\t 1.000000f, -1.000000f, 0.000000f, // clang-format :-/\n\t};\n\n\t// the collapse we expect is 7 -> 0\n\tunsigned int ib[] = {\n\t 7, 4, 3,\n\t 1, 2, 5,\n\t 7, 1, 6,\n\t 7, 8, 0, // gets removed\n\t 7, 6, 4,\n\t 8, 5, 2,\n\t 8, 7, 3,\n\t 8, 3, 5,\n\t 5, 6, 1,\n\t 7, 0, 1, // gets removed\n\t};\n\n\tunsigned int expected[] = {\n\t 0, 4, 3,\n\t 1, 2, 5,\n\t 0, 1, 6,\n\t 0, 6, 4,\n\t 8, 5, 2,\n\t 8, 0, 3,\n\t 8, 3, 5,\n\t 5, 6, 1, // clang-format :-/\n\t};\n\n\tassert(meshopt_simplify(ib, ib, 30, vb, 9, 12, 3, 1e-3f) == 24);\n\tassert(memcmp(ib, expected, sizeof(expected)) == 0);\n}\n\nstatic void simplifyScale()\n{\n\tconst float vb[] = {0, 0, 0, 1, 0, 0, 0, 2, 0, 0, 0, 3};\n\n\tassert(meshopt_simplifyScale(vb, 4, 12) == 3.f);\n}\n\nstatic void simplifyDegenerate()\n{\n\tfloat vb[] = {\n\t 0.000000f, 0.000000f, 0.000000f,\n\t 0.000000f, 1.000000f, 0.000000f,\n\t 0.000000f, 2.000000f, 0.000000f,\n\t 1.000000f, 0.000000f, 0.000000f,\n\t 2.000000f, 0.000000f, 0.000000f,\n\t 1.000000f, 1.000000f, 0.000000f, // clang-format :-/\n\t};\n\n\t// 0 1 2\n\t// 3 5\n\t// 4\n\n\tunsigned int ib[] = {\n\t 0, 1, 3,\n\t 3, 1, 5,\n\t 1, 2, 5,\n\t 3, 5, 4,\n\t 1, 0, 1, // these two degenerate triangles create a fake reverse edge\n\t 0, 3, 0, // which breaks border classification\n\t};\n\n\tunsigned int expected[] = {\n\t 0, 1, 4,\n\t 4, 1, 2, // clang-format :-/\n\t};\n\n\tassert(meshopt_simplify(ib, ib, 18, vb, 6, 12, 3, 1e-3f) == 6);\n\tassert(memcmp(ib, expected, sizeof(expected)) == 0);\n}\n\nstatic void simplifyLockBorder()\n{\n\tfloat vb[] = {\n\t 0.000000f, 0.000000f, 0.000000f,\n\t 0.000000f, 1.000000f, 0.000000f,\n\t 0.000000f, 2.000000f, 0.000000f,\n\t 1.000000f, 0.000000f, 0.000000f,\n\t 1.000000f, 1.000000f, 0.000000f,\n\t 1.000000f, 2.000000f, 0.000000f,\n\t 2.000000f, 0.000000f, 0.000000f,\n\t 2.000000f, 1.000000f, 0.000000f,\n\t 2.000000f, 2.000000f, 0.000000f, // clang-format :-/\n\t};\n\n\t// 0 1 2\n\t// 3 4 5\n\t// 6 7 8\n\n\tunsigned int ib[] = {\n\t 0, 1, 3,\n\t 3, 1, 4,\n\t 1, 2, 4,\n\t 4, 2, 5,\n\t 3, 4, 6,\n\t 6, 4, 7,\n\t 4, 5, 7,\n\t 7, 5, 8, // clang-format :-/\n\t};\n\n\tunsigned int expected[] = {\n\t 0, 1, 3,\n\t 1, 2, 3,\n\t 3, 2, 5,\n\t 6, 3, 7,\n\t 3, 5, 7,\n\t 7, 5, 8, // clang-format :-/\n\t};\n\n\tassert(meshopt_simplify(ib, ib, 24, vb, 9, 12, 3, 1e-3f, meshopt_SimplifyLockBorder) == 18);\n\tassert(memcmp(ib, expected, sizeof(expected)) == 0);\n}\n\nstatic void simplifyAttr(bool skip_g)\n{\n\tfloat vb[8 * 3][6];\n\n\tfor (int y = 0; y < 8; ++y)\n\t{\n\t\t// first four rows are a blue gradient, next four rows are a yellow gradient\n\t\tfloat r = (y < 4) ? 0.8f + y * 0.05f : 0.f;\n\t\tfloat g = (y < 4) ? 0.8f + y * 0.05f : 0.f;\n\t\tfloat b = (y < 4) ? 0.f : 0.8f + (7 - y) * 0.05f;\n\n\t\tfor (int x = 0; x < 3; ++x)\n\t\t{\n\t\t\tvb[y * 3 + x][0] = float(x);\n\t\t\tvb[y * 3 + x][1] = float(y);\n\t\t\tvb[y * 3 + x][2] = 0.03f * x + 0.03f * (y % 2) + (x == 2 && y == 7) * 0.03f;\n\t\t\tvb[y * 3 + x][3] = r;\n\t\t\tvb[y * 3 + x][4] = g;\n\t\t\tvb[y * 3 + x][5] = b;\n\t\t}\n\t}\n\n\tunsigned int ib[7 * 2][6];\n\n\tfor (int y = 0; y < 7; ++y)\n\t{\n\t\tfor (int x = 0; x < 2; ++x)\n\t\t{\n\t\t\tib[y * 2 + x][0] = (y + 0) * 3 + (x + 0);\n\t\t\tib[y * 2 + x][1] = (y + 0) * 3 + (x + 1);\n\t\t\tib[y * 2 + x][2] = (y + 1) * 3 + (x + 0);\n\t\t\tib[y * 2 + x][3] = (y + 1) * 3 + (x + 0);\n\t\t\tib[y * 2 + x][4] = (y + 0) * 3 + (x + 1);\n\t\t\tib[y * 2 + x][5] = (y + 1) * 3 + (x + 1);\n\t\t}\n\t}\n\n\tfloat attr_weights[3] = {0.5f, skip_g ? 0.f : 0.5f, 0.5f};\n\n\t// *0 1 *2\n\t// 3 4 5\n\t// 6 7 8\n\t// *9 10 *11\n\t// *12 13 *14\n\t// 15 16 17\n\t// 18 19 20\n\t// *21 22 *23\n\tunsigned int expected[3][6] = {\n\t {0, 2, 11, 0, 11, 9},\n\t {9, 11, 12, 12, 11, 14},\n\t {12, 14, 23, 12, 23, 21},\n\t};\n\n\tassert(meshopt_simplifyWithAttributes(ib[0], ib[0], 7 * 2 * 6, vb[0], 8 * 3, 6 * sizeof(float), vb[0] + 3, 6 * sizeof(float), attr_weights, 3, NULL, 6 * 3, 1e-2f) == 18);\n\tassert(memcmp(ib, expected, sizeof(expected)) == 0);\n}\n\nstatic void simplifyLockFlags()\n{\n\tfloat vb[] = {\n\t 0, 0, 0,\n\t 0, 1, 0,\n\t 0, 2, 0,\n\t 1, 0, 0,\n\t 1, 1, 0,\n\t 1, 2, 0,\n\t 2, 0, 0,\n\t 2, 1, 0,\n\t 2, 2, 0, // clang-format :-/\n\t};\n\n\tunsigned char lock[9] = {\n\t 1, 1, 1,\n\t 1, 0, 1,\n\t 1, 1, 1, // clang-format :-/\n\t};\n\n\t// 0 1 2\n\t// 3 4 5\n\t// 6 7 8\n\n\tunsigned int ib[] = {\n\t 0, 1, 3,\n\t 3, 1, 4,\n\t 1, 2, 4,\n\t 4, 2, 5,\n\t 3, 4, 6,\n\t 6, 4, 7,\n\t 4, 5, 7,\n\t 7, 5, 8, // clang-format :-/\n\t};\n\n\tunsigned int expected[] = {\n\t 0, 1, 3,\n\t 1, 2, 3,\n\t 3, 2, 5,\n\t 6, 3, 7,\n\t 3, 5, 7,\n\t 7, 5, 8, // clang-format :-/\n\t};\n\n\tassert(meshopt_simplifyWithAttributes(ib, ib, 24, vb, 9, 12, NULL, 0, NULL, 0, lock, 3, 1e-3f, 0) == 18);\n\tassert(memcmp(ib, expected, sizeof(expected)) == 0);\n}\n\nstatic void simplifyLockFlagsSeam()\n{\n\tfloat vb[] = {\n\t 0, 0, 0,\n\t 0, 1, 0,\n\t 0, 1, 0,\n\t 0, 2, 0,\n\t 1, 0, 0,\n\t 1, 1, 0,\n\t 1, 1, 0,\n\t 1, 2, 0,\n\t 2, 0, 0,\n\t 2, 1, 0,\n\t 2, 1, 0,\n\t 2, 2, 0, // clang-format :-/\n\t};\n\n\tunsigned char lock0[12] = {\n\t 1, 0, 0, 1,\n\t 0, 0, 0, 0,\n\t 1, 0, 0, 1, // clang-format :-/\n\t};\n\n\tunsigned char lock1[12] = {\n\t 1, 0, 0, 1,\n\t 1, 0, 0, 1,\n\t 1, 0, 0, 1, // clang-format :-/\n\t};\n\n\tunsigned char lock2[12] = {\n\t 1, 0, 1, 1,\n\t 1, 0, 1, 1,\n\t 1, 0, 1, 1, // clang-format :-/\n\t};\n\n\tunsigned char lock3[12] = {\n\t 1, 1, 0, 1,\n\t 1, 1, 0, 1,\n\t 1, 1, 0, 1, // clang-format :-/\n\t};\n\n\t// 0 1-2 3\n\t// 4 5-6 7\n\t// 8 9-10 11\n\n\tunsigned int ib[] = {\n\t 0, 1, 4,\n\t 4, 1, 5,\n\t 4, 5, 8,\n\t 8, 5, 9,\n\t 2, 3, 6,\n\t 6, 3, 7,\n\t 6, 7, 10,\n\t 10, 7, 11, // clang-format :-/\n\t};\n\n\tunsigned int res[24];\n\t// with no locks, we should be able to collapse the entire mesh (vertices 1-2 and 9-10 are locked but others can move towards them)\n\tassert(meshopt_simplifyWithAttributes(res, ib, 24, vb, 12, 12, NULL, 0, NULL, 0, NULL, 0, 1.f, 0) == 0);\n\n\t// with corners locked, we should get two quads\n\tassert(meshopt_simplifyWithAttributes(res, ib, 24, vb, 12, 12, NULL, 0, NULL, 0, lock0, 0, 1.f, 0) == 12);\n\n\t// with both sides locked, we can only collapse the seam spine\n\tassert(meshopt_simplifyWithAttributes(res, ib, 24, vb, 12, 12, NULL, 0, NULL, 0, lock1, 0, 1.f, 0) == 18);\n\n\t// with seam spine locked, we can collapse nothing; note that we intentionally test two different lock configurations\n\t// they each lock only one side of the seam spine, which should be equivalent\n\tassert(meshopt_simplifyWithAttributes(res, ib, 24, vb, 12, 12, NULL, 0, NULL, 0, lock2, 0, 1.f, 0) == 24);\n\tassert(meshopt_simplifyWithAttributes(res, ib, 24, vb, 12, 12, NULL, 0, NULL, 0, lock3, 0, 1.f, 0) == 24);\n}\n\nstatic void simplifySparse()\n{\n\tfloat vb[] = {\n\t 0, 0, 100,\n\t 0, 1, 0,\n\t 0, 2, 100,\n\t 1, 0, 0.1f,\n\t 1, 1, 0.1f,\n\t 1, 2, 0.1f,\n\t 2, 0, 100,\n\t 2, 1, 0,\n\t 2, 2, 100, // clang-format :-/\n\t};\n\n\tfloat vba[] = {\n\t 100,\n\t 0.5f,\n\t 100,\n\t 0.5f,\n\t 0.5f,\n\t 0,\n\t 100,\n\t 0.5f,\n\t 100, // clang-format :-/\n\t};\n\n\tfloat aw[] = {\n\t 0.5f};\n\n\tunsigned char lock[9] = {\n\t 8, 1, 8,\n\t 1, 0, 1,\n\t 8, 1, 8, // clang-format :-/\n\t};\n\n\t// 1\n\t// 3 4 5\n\t// 7\n\n\tunsigned int ib[] = {\n\t 3, 1, 4,\n\t 1, 5, 4,\n\t 3, 4, 7,\n\t 4, 5, 7, // clang-format :-/\n\t};\n\n\tunsigned int res[12];\n\n\t// vertices 3-4-5 are slightly elevated along Z which guides the collapses when only using geometry\n\tunsigned int expected[] = {\n\t 1, 5, 3,\n\t 3, 5, 7, // clang-format :-/\n\t};\n\n\tassert(meshopt_simplify(res, ib, 12, vb, 9, 12, 6, 1e-3f, meshopt_SimplifySparse) == 6);\n\tassert(memcmp(res, expected, sizeof(expected)) == 0);\n\n\t// vertices 1-4-7 have a crease in the attribute value which guides the collapses the opposite way when weighing attributes sufficiently\n\tunsigned int expecteda[] = {\n\t 3, 1, 7,\n\t 1, 5, 7, // clang-format :-/\n\t};\n\n\tassert(meshopt_simplifyWithAttributes(res, ib, 12, vb, 9, 12, vba, sizeof(float), aw, 1, lock, 6, 1e-1f, meshopt_SimplifySparse) == 6);\n\tassert(memcmp(res, expecteda, sizeof(expecteda)) == 0);\n\n\t// a final test validates that destination can alias when using sparsity\n\tassert(meshopt_simplify(ib, ib, 12, vb, 9, 12, 6, 1e-3f, meshopt_SimplifySparse) == 6);\n\tassert(memcmp(ib, expected, sizeof(expected)) == 0);\n}\n\nstatic void simplifyErrorAbsolute()\n{\n\tfloat vb[] = {\n\t 0, 0, 0,\n\t 0, 1, 0,\n\t 0, 2, 0,\n\t 1, 0, 0,\n\t 1, 1, 1,\n\t 1, 2, 0,\n\t 2, 0, 0,\n\t 2, 1, 0,\n\t 2, 2, 0, // clang-format :-/\n\t};\n\n\t// 0 1 2\n\t// 3 4 5\n\t// 6 7 8\n\n\tunsigned int ib[] = {\n\t 0, 1, 3,\n\t 3, 1, 4,\n\t 1, 2, 4,\n\t 4, 2, 5,\n\t 3, 4, 6,\n\t 6, 4, 7,\n\t 4, 5, 7,\n\t 7, 5, 8, // clang-format :-/\n\t};\n\n\tfloat error = 0.f;\n\tassert(meshopt_simplify(ib, ib, 24, vb, 9, 12, 18, 2.f, meshopt_SimplifyLockBorder | meshopt_SimplifyErrorAbsolute, &error) == 18);\n\tassert(fabsf(error - 0.85f) < 0.01f);\n}\n\nstatic void simplifySeam()\n{\n\t// xyz+attr\n\tfloat vb[] = {\n\t 0, 0, 0, 0,\n\t 0, 1, 0, 0,\n\t 0, 1, 0, 1,\n\t 0, 2, 0, 1,\n\t 1, 0, 0, 0,\n\t 1, 1, 0.3f, 0,\n\t 1, 1, 0.3f, 1,\n\t 1, 2, 0, 1,\n\t 2, 0, 0, 0,\n\t 2, 1, 0.1f, 0,\n\t 2, 1, 0.1f, 1,\n\t 2, 2, 0, 1,\n\t 3, 0, 0, 0,\n\t 3, 1, 0, 0,\n\t 3, 1, 0, 1,\n\t 3, 2, 0, 1, // clang-format :-/\n\t};\n\n\t// 0 1-2 3\n\t// 4 5-6 7\n\t// 8 9-10 11\n\t// 12 13-14 15\n\n\tunsigned int ib[] = {\n\t 0, 1, 4,\n\t 4, 1, 5,\n\t 2, 3, 6,\n\t 6, 3, 7,\n\t 4, 5, 8,\n\t 8, 5, 9,\n\t 6, 7, 10,\n\t 10, 7, 11,\n\t 8, 9, 12,\n\t 12, 9, 13,\n\t 10, 11, 14,\n\t 14, 11, 15, // clang-format :-/\n\t};\n\n\t// note: vertices 1-2 and 13-14 are classified as locked, because they are on a seam & a border\n\t// 0 1-2 3\n\t// 5-6\n\t// 9-10\n\t// 12 13-14 15\n\tunsigned int expected[] = {\n\t 0, 1, 13,\n\t 2, 3, 14,\n\t 0, 13, 12,\n\t 14, 3, 15, // clang-format :-/\n\t};\n\n\tunsigned int res[36];\n\tfloat error = 0.f;\n\n\tassert(meshopt_simplify(res, ib, 36, vb, 16, 16, 12, 1.f, 0, &error) == 12);\n\tassert(memcmp(res, expected, sizeof(expected)) == 0);\n\tassert(fabsf(error - 0.1f) < 0.01f); // note: the error is not zero because there is a difference in height between the seam vertices\n\n\tfloat aw = 1;\n\tassert(meshopt_simplifyWithAttributes(res, ib, 36, vb, 16, 16, vb + 3, 16, &aw, 1, NULL, 12, 2.f, 0, &error) == 12);\n\tassert(memcmp(res, expected, sizeof(expected)) == 0);\n\tassert(fabsf(error - 0.1f) < 0.01f); // note: this is the same error as above because the attribute is constant on either side of the seam\n}\n\nstatic void simplifySeamFake()\n{\n\t// xyz+attr\n\tfloat vb[] = {\n\t 0, 0, 0, 0,\n\t 1, 0, 0, 1,\n\t 1, 0, 0, 2,\n\t 0, 0, 0, 3, // clang-format :-/\n\t};\n\n\tunsigned int ib[] = {\n\t 0, 1, 2,\n\t 2, 1, 3, // clang-format :-/\n\t};\n\n\tassert(meshopt_simplify(ib, ib, 6, vb, 4, 16, 0, 1.f, 0, NULL) == 6);\n}\n\nstatic void simplifySeamAttr()\n{\n\t// xyz+attr\n\tfloat vb[] = {\n\t 0, 0, 0, 0,\n\t 0, 1, 0, 0,\n\t 0, 1, 0, 0,\n\t 0, 2, 0, 0,\n\t 1, 0, 0, 1,\n\t 1, 1, 0, 1,\n\t 1, 1, 0, 1,\n\t 1, 2, 0, 1,\n\t 4, 0, 0, 2,\n\t 4, 1, 0, 2,\n\t 4, 1, 0, 2,\n\t 4, 2, 0, 2, // clang-format :-/\n\t};\n\n\t// 0 1-2 3\n\t// 4 5-6 7\n\t// 8 9-10 11\n\n\tunsigned int ib[] = {\n\t 0, 1, 4,\n\t 4, 1, 5,\n\t 2, 3, 6,\n\t 6, 3, 7,\n\t 4, 5, 8,\n\t 8, 5, 9,\n\t 6, 7, 10,\n\t 10, 7, 11, // clang-format :-/\n\t};\n\n\t// note: vertices 1-2 and 9-10 are classified as locked, because they are on a seam & a border\n\t// 0 1-2 3\n\t// 4 7\n\t// 8 9-10 11\n\tunsigned int expected[] = {\n\t 0, 1, 4,\n\t 2, 3, 7,\n\t 4, 1, 8,\n\t 8, 1, 9,\n\t 2, 7, 10,\n\t 10, 7, 11, // clang-format :-/\n\t};\n\n\tunsigned int res[24];\n\tfloat error = 0.f;\n\n\tfloat aw = 1;\n\tassert(meshopt_simplifyWithAttributes(res, ib, 24, vb, 12, 16, vb + 3, 16, &aw, 1, NULL, 12, 2.f, meshopt_SimplifyLockBorder, &error) == 18);\n\tassert(memcmp(res, expected, sizeof(expected)) == 0);\n\tassert(fabsf(error - 0.35f) < 0.01f);\n}\n\nstatic void simplifyDebug()\n{\n\t// 0\n\t// 1 2\n\t// 3 4 5\n\tunsigned int ib[] = {\n\t 0, 2, 1,\n\t 1, 2, 3,\n\t 3, 2, 4,\n\t 2, 5, 4, // clang-format :-/\n\t};\n\n\tfloat vb[] = {\n\t 0, 4, 0,\n\t 0, 1, 0,\n\t 2, 2, 0,\n\t 0, 0, 0,\n\t 1, 0, 0,\n\t 4, 0, 0, // clang-format :-/\n\t};\n\n\tunsigned int expected[] = {\n\t 0 | (9u << 28),\n\t 5 | (9u << 28),\n\t 3 | (9u << 28),\n\t};\n\n\tconst unsigned int meshopt_SimplifyInternalDebug = 1 << 30;\n\n\tfloat error;\n\tassert(meshopt_simplify(ib, ib, 12, vb, 6, 12, 3, 1e-2f, meshopt_SimplifyInternalDebug, &error) == 3);\n\tassert(error < 1e-4f);\n\tassert(memcmp(ib, expected, sizeof(expected)) == 0);\n}\n\nstatic void simplifyPrune()\n{\n\t// 0\n\t// 1 2\n\t// 3 4 5\n\t// +\n\t// 6 7 8 (same position)\n\tunsigned int ib[] = {\n\t 3, 2, 4,\n\t 0, 2, 1,\n\t 1, 2, 3,\n\t 2, 5, 4,\n\t 6, 7, 8, // clang-format :-/\n\t};\n\n\tfloat vb[] = {\n\t 0, 4, 0,\n\t 0, 1, 0,\n\t 2, 2, 0,\n\t 0, 0, 0,\n\t 1, 0, 0,\n\t 4, 0, 0,\n\t 1, 1, 1,\n\t 1, 1, 1,\n\t 1, 1, 1, // clang-format :-/\n\t};\n\n\tunsigned int expected[] = {\n\t 0,\n\t 5,\n\t 3,\n\t};\n\n\tfloat error;\n\tassert(meshopt_simplify(ib, ib, 15, vb, 9, 12, 3, 1e-2f, meshopt_SimplifyPrune, &error) == 3);\n\tassert(error < 1e-4f);\n\tassert(memcmp(ib, expected, sizeof(expected)) == 0);\n\n\t// re-run prune with and without sparsity on a small subset to make sure the component code correctly handles sparse subsets\n\tassert(meshopt_simplify(ib, ib, 3, vb, 9, 12, 3, 1e-2f, meshopt_SimplifyPrune, &error) == 3);\n\tassert(meshopt_simplify(ib, ib, 3, vb, 9, 12, 3, 1e-2f, meshopt_SimplifyPrune | meshopt_SimplifySparse, &error) == 3);\n\tassert(memcmp(ib, expected, sizeof(expected)) == 0);\n}\n\nstatic void simplifyPruneCleanup()\n{\n\tunsigned int ib[] = {\n\t 0, 1, 2,\n\t 3, 4, 5,\n\t 6, 7, 8, // clang-format :-/\n\t};\n\n\tfloat vb[] = {\n\t 0, 0, 0,\n\t 0, 1, 0,\n\t 1, 0, 0,\n\t 0, 0, 1,\n\t 0, 2, 1,\n\t 2, 0, 1,\n\t 0, 0, 2,\n\t 0, 4, 2,\n\t 4, 0, 2, // clang-format :-/\n\t};\n\n\tunsigned int expected[] = {\n\t 6,\n\t 7,\n\t 8,\n\t};\n\n\tfloat error;\n\tassert(meshopt_simplify(ib, ib, 9, vb, 9, 12, 3, 1.f, meshopt_SimplifyLockBorder | meshopt_SimplifyPrune, &error) == 3);\n\tassert(fabsf(error - 0.37f) < 0.01f);\n\tassert(memcmp(ib, expected, sizeof(expected)) == 0);\n}\n\nstatic void simplifyPruneFunc()\n{\n\tunsigned int ib[] = {\n\t 0, 1, 2,\n\t 3, 4, 5,\n\t 6, 7, 8, // clang-format :-/\n\t};\n\n\tfloat vb[] = {\n\t 0, 0, 0,\n\t 0, 1, 0,\n\t 1, 0, 0,\n\t 0, 0, 1,\n\t 0, 2, 1,\n\t 2, 0, 1,\n\t 0, 0, 2,\n\t 0, 4, 2,\n\t 4, 0, 2, // clang-format :-/\n\t};\n\n\tunsigned int expected[] = {\n\t 6,\n\t 7,\n\t 8,\n\t};\n\n\tassert(meshopt_simplifyPrune(ib, ib, 9, vb, 9, 12, 0.5f) == 3);\n\tassert(memcmp(ib, expected, sizeof(expected)) == 0);\n}\n\nstatic void simplifyUpdate()\n{\n\tfloat vb[5][4] = {\n\t {0, 0, 0, 0},\n\t {1, 1, 0, 0},\n\t {2, 0, 0, 0},\n\t {0.9f, 0.2f, 0.1f, 0.2f},\n\t {1.1f, 0.2f, 0.1f, 0.1f},\n\t};\n\n\t// 1\n\t// 3 4\n\t// 0 2\n\tunsigned int ib[15] = {\n\t 0, 1, 3, 3, 1, 4, 4, 1, 2, 0, 3, 2, 3, 4, 2, //\n\t};\n\n\tfloat attr_weight = 1.f;\n\n\tassert(meshopt_simplifyWithUpdate(ib, 15, vb[0], 5, 4 * sizeof(float), vb[0] + 3, 4 * sizeof(float), &attr_weight, 1, NULL, 9, 1.f) == 9);\n\n\tunsigned int expected[] = {\n\t 0, 1, 3, 3, 1, 2, 0, 3, 2, //\n\t};\n\n\tassert(memcmp(ib, expected, sizeof(expected)) == 0);\n\n\t// border vertices haven't moved but may have small floating point drift\n\tfor (int i = 0; i < 3; ++i)\n\t\tassert(fabsf(vb[i][3]) < 1e-6f);\n\n\t// center vertex got updated\n\tassert(fabsf(vb[3][0] - 0.88f) < 1e-2f);\n\tassert(fabsf(vb[3][1] - 0.19f) < 1e-2f);\n\tassert(fabsf(vb[3][2] - 0.11f) < 1e-2f);\n\tassert(fabsf(vb[3][3] - 0.18f) < 1e-2f);\n}\n\nstatic void simplifyUpdateLocked(unsigned int options)\n{\n\tfloat vb[5][4] = {\n\t {0, 0, 0, 0},\n\t {1, 1, 0, 0},\n\t {2, 0, 0, 0},\n\t {0.9f, 0.2f, 0.1f, 0.2f},\n\t {1.1f, 0.2f, 0.1f, 0.1f},\n\t};\n\n\t// 1\n\t// 3 4\n\t// 0 2\n\tunsigned int ib[15] = {\n\t 0, 1, 3, 3, 1, 4, 4, 1, 2, 0, 3, 2, 3, 4, 2, //\n\t};\n\n\tfloat attr_weight = 1.f;\n\n\tunsigned char vertex_lock[5] = {0, 0, 0, 1, 0};\n\n\tassert(meshopt_simplifyWithUpdate(ib, 15, vb[0], 5, 4 * sizeof(float), vb[0] + 3, 4 * sizeof(float), &attr_weight, 1, vertex_lock, 9, 1.f, options) == 9);\n\n\tunsigned int expected[] = {\n\t 0, 1, 3, 3, 1, 2, 0, 3, 2, //\n\t};\n\n\tassert(memcmp(ib, expected, sizeof(expected)) == 0);\n\n\tfor (int i = 0; i < 3; ++i)\n\t\tassert(fabsf(vb[i][3]) < 1e-6f);\n\n\t// locking guarantees exact result\n\tassert(vb[3][0] == 0.9f);\n\tassert(vb[3][1] == 0.2f);\n\tassert(vb[3][2] == 0.1f);\n\tassert(vb[3][3] == 0.2f);\n}\n\nstatic void adjacency()\n{\n\t// 0 1/4\n\t// 2/5 3\n\tconst float vb[] = {0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 0, 1, 0};\n\tconst unsigned int ib[] = {0, 1, 2, 5, 4, 3};\n\n\tunsigned int adjib[12];\n\tmeshopt_generateAdjacencyIndexBuffer(adjib, ib, 6, vb, 6, 12);\n\n\tunsigned int expected[] = {\n\t // patch 0\n\t 0, 0,\n\t 1, 3,\n\t 2, 2,\n\n\t // patch 1\n\t 5, 0,\n\t 4, 4,\n\t 3, 3,\n\n\t // clang-format :-/\n\t};\n\n\tassert(memcmp(adjib, expected, sizeof(expected)) == 0);\n}\n\nstatic void tessellation()\n{\n\t// 0 1/4\n\t// 2/5 3\n\tconst float vb[] = {0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 0, 1, 0};\n\tconst unsigned int ib[] = {0, 1, 2, 5, 4, 3};\n\n\tunsigned int tessib[24];\n\tmeshopt_generateTessellationIndexBuffer(tessib, ib, 6, vb, 6, 12);\n\n\tunsigned int expected[] = {\n\t // patch 0\n\t 0, 1, 2,\n\t 0, 1,\n\t 4, 5,\n\t 2, 0,\n\t 0, 1, 2,\n\n\t // patch 1\n\t 5, 4, 3,\n\t 2, 1,\n\t 4, 3,\n\t 3, 5,\n\t 2, 1, 3,\n\n\t // clang-format :-/\n\t};\n\n\tassert(memcmp(tessib, expected, sizeof(expected)) == 0);\n}\n\nstatic void provoking()\n{\n\t// 0 1 2\n\t// 3 4 5\n\tconst unsigned int ib[] = {\n\t 0, 1, 3,\n\t 3, 1, 4,\n\t 1, 2, 4,\n\t 4, 2, 5,\n\t 0, 2, 4,\n\t // clang-format :-/\n\t};\n\n\tunsigned int pib[15];\n\tunsigned int pre[6 + 5]; // limit is vertex count + triangle count\n\tsize_t res = meshopt_generateProvokingIndexBuffer(pib, pre, ib, 15, 6);\n\n\tunsigned int expectedib[] = {\n\t 0, 5, 1,\n\t 1, 4, 0,\n\t 2, 4, 1,\n\t 3, 4, 2,\n\t 4, 5, 2,\n\t // clang-format :-/\n\t};\n\n\tunsigned int expectedre[] = {\n\t 3, 1, 2, 5, 4, 0,\n\t // clang-format :-/\n\t};\n\n\tassert(res == 6);\n\tassert(memcmp(pib, expectedib, sizeof(expectedib)) == 0);\n\tassert(memcmp(pre, expectedre, sizeof(expectedre)) == 0);\n}\n\nstatic void quantizeFloat()\n{\n\tvolatile float zero = 0.f; // avoids div-by-zero warnings\n\n\tassert(meshopt_quantizeFloat(1.2345f, 23) == 1.2345f);\n\n\tassert(meshopt_quantizeFloat(1.2345f, 16) == 1.2344971f);\n\tassert(meshopt_quantizeFloat(1.2345f, 8) == 1.2343750f);\n\tassert(meshopt_quantizeFloat(1.2345f, 4) == 1.25f);\n\tassert(meshopt_quantizeFloat(1.2345f, 1) == 1.0);\n\n\tassert(meshopt_quantizeFloat(1.f, 0) == 1.0f);\n\n\tassert(meshopt_quantizeFloat(1.f / zero, 0) == 1.f / zero);\n\tassert(meshopt_quantizeFloat(-1.f / zero, 0) == -1.f / zero);\n\n\tfloat nanf = meshopt_quantizeFloat(zero / zero, 8);\n\tassert(nanf != nanf);\n}\n\nstatic void quantizeHalf()\n{\n\tvolatile float zero = 0.f; // avoids div-by-zero warnings\n\n\t// normal\n\tassert(meshopt_quantizeHalf(1.2345f) == 0x3cf0);\n\n\t// overflow\n\tassert(meshopt_quantizeHalf(65535.f) == 0x7c00);\n\tassert(meshopt_quantizeHalf(-65535.f) == 0xfc00);\n\n\t// large\n\tassert(meshopt_quantizeHalf(65000.f) == 0x7bef);\n\tassert(meshopt_quantizeHalf(-65000.f) == 0xfbef);\n\n\t// small\n\tassert(meshopt_quantizeHalf(0.125f) == 0x3000);\n\tassert(meshopt_quantizeHalf(-0.125f) == 0xb000);\n\n\t// very small\n\tassert(meshopt_quantizeHalf(1e-4f) == 0x068e);\n\tassert(meshopt_quantizeHalf(-1e-4f) == 0x868e);\n\n\t// underflow\n\tassert(meshopt_quantizeHalf(1e-5f) == 0x0000);\n\tassert(meshopt_quantizeHalf(-1e-5f) == 0x8000);\n\n\t// exponent underflow\n\tassert(meshopt_quantizeHalf(1e-20f) == 0x0000);\n\tassert(meshopt_quantizeHalf(-1e-20f) == 0x8000);\n\n\t// exponent overflow\n\tassert(meshopt_quantizeHalf(1e20f) == 0x7c00);\n\tassert(meshopt_quantizeHalf(-1e20f) == 0xfc00);\n\n\t// inf\n\tassert(meshopt_quantizeHalf(1.f / zero) == 0x7c00);\n\tassert(meshopt_quantizeHalf(-1.f / zero) == 0xfc00);\n\n\t// nan\n\tunsigned short nanh = meshopt_quantizeHalf(zero / zero);\n\tassert(nanh == 0x7e00 || nanh == 0xfe00);\n}\n\nstatic void dequantizeHalf()\n{\n\tvolatile float zero = 0.f; // avoids div-by-zero warnings\n\n\t// normal\n\tassert(meshopt_dequantizeHalf(0x3cf0) == 1.234375f);\n\n\t// large\n\tassert(meshopt_dequantizeHalf(0x7bef) == 64992.f);\n\tassert(meshopt_dequantizeHalf(0xfbef) == -64992.f);\n\n\t// small\n\tassert(meshopt_dequantizeHalf(0x3000) == 0.125f);\n\tassert(meshopt_dequantizeHalf(0xb000) == -0.125f);\n\n\t// very small\n\tassert(meshopt_dequantizeHalf(0x068e) == 1.00016594e-4f);\n\tassert(meshopt_dequantizeHalf(0x868e) == -1.00016594e-4f);\n\n\t// denormal\n\tassert(meshopt_dequantizeHalf(0x00ff) == 0.f);\n\tassert(meshopt_dequantizeHalf(0x80ff) == 0.f); // actually this is -0.f\n\tassert(1.f / meshopt_dequantizeHalf(0x80ff) == -1.f / zero);\n\n\t// inf\n\tassert(meshopt_dequantizeHalf(0x7c00) == 1.f / zero);\n\tassert(meshopt_dequantizeHalf(0xfc00) == -1.f / zero);\n\n\t// nan\n\tfloat nanf = meshopt_dequantizeHalf(0x7e00);\n\tassert(nanf != nanf);\n}\n\nstatic void encodeMeshletBound()\n{\n\tconst unsigned char triangles[5 * 3] = {\n\t 0, 1, 2,\n\t 2, 1, 3,\n\t 3, 5, 4,\n\t 2, 0, 6,\n\t 7, 7, 7, // clang-format :-/\n\t};\n\n\tconst unsigned int vertices[7] = {\n\t 5,\n\t 12,\n\t 140,\n\t 0,\n\t 12389,\n\t 123456789,\n\t 7,\n\t};\n\n\tsize_t bound = meshopt_encodeMeshletBound(7, 5);\n\n\tunsigned char enc[256];\n\tsize_t size = meshopt_encodeMeshlet(enc, sizeof(enc), vertices, 7, triangles, 5);\n\tassert(size > 0 && size <= bound);\n\n\tassert(meshopt_encodeMeshlet(enc, size - 1, vertices, 7, triangles, 5) == 0);\n}\n\ntemplate \nstatic void validateDecodeMeshlet(const unsigned char* data, size_t size, const unsigned int* vertices, size_t vertex_count, const unsigned char* triangles, size_t triangle_count)\n{\n\tV rv[VS];\n\tT rt[TS];\n\n\tint rc = meshopt_decodeMeshlet(rv, vertex_count, rt, triangle_count, data, size);\n\tassert(rc == 0);\n\n\tfor (size_t j = 0; j < vertex_count; ++j)\n\t\tassert(rv[j] == V(vertices[j]));\n\n\tfor (size_t j = 0; j < triangle_count; ++j)\n\t{\n\t\tunsigned int a = triangles[j * 3 + 0];\n\t\tunsigned int b = triangles[j * 3 + 1];\n\t\tunsigned int c = triangles[j * 3 + 2];\n\n\t\tunsigned int tri = sizeof(T) == 1 ? rt[j * 3] | (rt[j * 3 + 1] << 8) | (rt[j * 3 + 2] << 16) : rt[j];\n\n\t\tunsigned int abc = (a << 0) | (b << 8) | (c << 16);\n\t\tunsigned int bca = (b << 0) | (c << 8) | (a << 16);\n\t\tunsigned int cba = (c << 0) | (a << 8) | (b << 16);\n\n\t\tassert(tri == abc || tri == bca || tri == cba);\n\t}\n}\n\nstatic void decodeMeshletSafety()\n{\n\tconst unsigned char triangles[5 * 3] = {\n\t 0, 1, 2,\n\t 2, 1, 3,\n\t 3, 5, 4,\n\t 2, 0, 6,\n\t 6, 6, 6, // clang-format :-/\n\t};\n\n\tconst unsigned int vertices[7] = {\n\t 5,\n\t 12,\n\t 140,\n\t 0,\n\t 12389,\n\t 123456789,\n\t 7,\n\t};\n\n\tunsigned char encb[256];\n\tsize_t size = meshopt_encodeMeshlet(encb, sizeof(encb), vertices, 7, triangles, 5);\n\tassert(size > 0);\n\n\t// move encoded buffer to the end to make sure any over-reads trigger sanitizers\n\tunsigned char* enc = encb + sizeof(encb) - size;\n\tmemmove(enc, encb, size);\n\n\tvalidateDecodeMeshlet(enc, size, vertices, 7, triangles, 5);\n\n\t// decodeMeshlet uses aligned 32-bit writes => must round vertex/triangle storage up when using short/char decoding\n\t// note the +1 in triangle storage is because align(5*3, 4) = 16; it's up to +3 in general case\n\tvalidateDecodeMeshlet(enc, size, vertices, 7, triangles, 5);\n\tvalidateDecodeMeshlet(enc, size, vertices, 7, triangles, 5);\n\tvalidateDecodeMeshlet(enc, size, vertices, 7, triangles, 5);\n\n\t// any truncated input should not be decodable; we check both prefix and suffix truncation\n\tunsigned int rv[7], rt[5];\n\n\tfor (size_t i = 1; i < size; ++i)\n\t\tassert(meshopt_decodeMeshlet(rv, 7, rt, 5, enc, i) < 0);\n\tfor (size_t i = 1; i < size; ++i)\n\t\tassert(meshopt_decodeMeshlet(rv, 7, rt, 5, enc + i, size - i) < 0);\n\n\t// because SIMD implementation is specialized by size, we need to test truncated inputs for short representations\n\tunsigned short rvs[7 + 1]; // 32b alignment\n\tunsigned char rts[5 * 3 + 1]; // 32b alignment\n\n\tfor (size_t i = 1; i < size; ++i)\n\t\tassert(meshopt_decodeMeshlet(rvs, 7, rts, 5, enc, i) < 0);\n\tfor (size_t i = 1; i < size; ++i)\n\t\tassert(meshopt_decodeMeshlet(rvs, 7, rts, 5, enc + i, size - i) < 0);\n\n\t// when using decodeMeshletRaw, the output buffer sizes must be 16b aligned\n\tunsigned int rvr[8], rtr[8];\n\n\tfor (size_t i = 1; i < size; ++i)\n\t\tassert(meshopt_decodeMeshletRaw(rvr, 7, rtr, 5, enc, i) < 0);\n\tfor (size_t i = 1; i < size; ++i)\n\t\tassert(meshopt_decodeMeshletRaw(rvr, 7, rtr, 5, enc + i, size - i) < 0);\n\n\t// otherwise, decodeMeshlet and decodeMeshletRaw should agree\n\tint rc = meshopt_decodeMeshlet(rv, 7, rt, 5, enc, size);\n\tint rcr = meshopt_decodeMeshletRaw(rvr, 7, rtr, 5, enc, size);\n\n\tassert(rc == 0 && rcr == 0);\n\tassert(memcmp(rv, rvr, 7 * sizeof(unsigned int)) == 0);\n\tassert(memcmp(rt, rtr, 5 * sizeof(unsigned int)) == 0);\n}\n\nstatic void decodeMeshletBasic()\n{\n\tconst unsigned char triangles[5 * 3] = {\n\t 0, 1, 2,\n\t 2, 1, 3,\n\t 4, 3, 5,\n\t 2, 0, 6,\n\t 6, 6, 6, // clang-format :-/\n\t};\n\n\tconst unsigned int vertices[7] = {\n\t 5,\n\t 12,\n\t 140,\n\t 0,\n\t 12389,\n\t 123456789,\n\t 7,\n\t};\n\n\tconst unsigned char encoded[46] = {\n\t 0x0a, 0x0c, 0xfe, 0x19, 0x01, 0xc8, 0x60, 0x00, 0x00, 0x5e, 0x39, 0xb7, 0x0e, 0x1d, 0x9a, 0xb7,\n\t 0x0e, 0x00, 0x00, 0x00, 0x00, 0x04, 0x03, 0x05, 0x02, 0x00, 0x06, 0x06, 0x06, 0x06, 0x00, 0x00,\n\t 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x87, 0xff, 0x2c, 0xff, 0x0f, // clang-format :-/\n\t};\n\n\tunsigned int rv[7];\n\tunsigned char rt[5 * 3 + 1];\n\tint rc = meshopt_decodeMeshlet(rv, 7, rt, 5, encoded, sizeof(encoded));\n\n\tassert(rc == 0);\n\tassert(memcmp(rv, vertices, sizeof(vertices)) == 0);\n\tassert(memcmp(rt, triangles, sizeof(triangles)) == 0);\n}\n\nstatic void decodeMeshletTypical()\n{\n\tconst unsigned char triangles[44 * 3] = {\n\t 0, 1, 2, 0, 2, 3, 3, 2, 4, 3, 4, 5, 0, 3, 6, 6, 3, 5, 0, 6, 7, 7, 6, 8,\n\t 8, 6, 5, 7, 8, 9, 8, 5, 10, 10, 5, 4, 10, 4, 11, 11, 4, 12, 11, 12, 13, 10, 11, 14,\n\t 10, 14, 8, 14, 11, 15, 15, 11, 13, 15, 13, 16, 15, 16, 14, 16, 13, 17, 14, 16, 18, 14, 18, 8,\n\t 18, 16, 19, 19, 16, 20, 20, 16, 17, 20, 17, 21, 20, 21, 22, 20, 22, 19, 22, 21, 23, 19, 22, 24,\n\t 19, 24, 25, 19, 25, 18, 18, 25, 26, 18, 26, 8, 8, 26, 9, 22, 23, 27, 22, 27, 24, 27, 23, 28,\n\t 27, 28, 29, 27, 29, 24, 29, 28, 30, 24, 29, 31, // clang-format :-/\n\t};\n\n\tconst unsigned int vertices[32] = {\n\t 10, 11, 9, 12, 8, 13, 14, 15, 16, 17, 18, 19, 0, 20, 21, 22,\n\t 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, // clang-format :-/\n\t};\n\n\tconst unsigned char encoded[53] = {\n\t 0x14, 0x05, 0x04, 0x09, 0x08, 0x27, 0x26, 0x05, 0x05, 0x04, 0x08, 0x0d, 0x0e, 0x08, 0x11, 0x13,\n\t 0x12, 0x08, 0x09, 0x16, 0x17, 0x18, 0x18, 0x0d, 0x03, 0x00, 0x03, 0x00, 0x00, 0x00, 0x00, 0x0c,\n\t 0x02, 0x38, 0x24, 0x43, 0x34, 0x20, 0x80, 0x61, 0x03, 0x61, 0x16, 0x26, 0x03, 0x10, 0x66, 0x10,\n\t 0x12, 0xe3, 0x61, 0x10, 0x66, // clang-format :-/\n\t};\n\n\tunsigned int rv[32];\n\tunsigned char rt[44 * 3];\n\tint rc = meshopt_decodeMeshlet(rv, 32, rt, 44, encoded, sizeof(encoded));\n\n\tassert(rc == 0);\n\tassert(memcmp(rv, vertices, sizeof(vertices)) == 0);\n\tassert(memcmp(rt, triangles, sizeof(triangles)) == 0);\n}\n\nstatic void opacityMap()\n{\n\tconst size_t triangle_count = 6;\n\tconst size_t vertex_count = 8;\n\n\tconst unsigned int indices[triangle_count * 3] = {\n\t // 4 corner triangles\n\t 0, 4, 7,\n\t 1, 5, 4,\n\t 2, 6, 5,\n\t 3, 7, 6,\n\n\t // 2 center triangles (2x larger)\n\t 4, 6, 5, // note: this triangle is flipped from its correct orientation to produce the same OMM to test compaction\n\t 4, 6, 7, // clang-format :-/\n\t};\n\n\tconst float uvs[vertex_count * 2] = {\n\t 0.f, 0.f,\n\t 1.f, 0.f,\n\t 1.f, 1.f,\n\t 0.f, 1.f,\n\t 0.5f, 0.f,\n\t 1.f, 0.5f,\n\t 0.5f, 1.f,\n\t 0.f, 0.5f, // clang-format :-/\n\t};\n\n\tconst unsigned int texture_size = 32;\n\tunsigned char texture[texture_size * texture_size];\n\n\tfloat center = float(texture_size) * 0.5f;\n\tfloat radius = 10.f;\n\n\tfor (unsigned int y = 0; y < texture_size; ++y)\n\t\tfor (unsigned int x = 0; x < texture_size; ++x)\n\t\t{\n\t\t\tfloat dx = float(x) + 0.5f - center;\n\t\t\tfloat dy = float(y) + 0.5f - center;\n\t\t\tfloat dc = radius - sqrtf(dx * dx + dy * dy);\n\n\t\t\ttexture[y * texture_size + x] = (unsigned char)meshopt_quantizeUnorm(dc + 0.5f, 8);\n\t\t}\n\n\t// subdivision parameterrs\n\tconst float target_edge = 2.5f;\n\tconst int max_level = 4;\n\n\t// state histogram for testing\n\tint histogram[2][4] = {};\n\n\tfor (int k = 0; k < 2; ++k)\n\t{\n\t\tint states = 2 << k;\n\n\t\tunsigned char levels[triangle_count];\n\t\tunsigned int sources[triangle_count];\n\t\tint omm_indices[triangle_count];\n\n\t\t// compute level and source triangle per OMM; note that this can also deduplicate OMMs based on UVs but in our case the UVs are unique\n\t\tsize_t omm_count = meshopt_opacityMapMeasure(levels, sources, omm_indices, indices, triangle_count * 3, uvs, vertex_count, sizeof(float) * 2, texture_size, texture_size, max_level, target_edge);\n\t\tassert(omm_count <= triangle_count);\n\n\t\t// validate expected levels/special indices based on underlying test data; depends on implementation specifics, might change\n\t\tassert(levels[0] == 2 && levels[1] == 2 && levels[2] == 2 && levels[3] == 2);\n\t\tassert(levels[4] == 3 && levels[5] == 3);\n\n\t\t// layout OMM data\n\t\tstd::vector offsets(omm_count);\n\t\tsize_t data_size = 0;\n\n\t\tfor (size_t i = 0; i < omm_count; ++i)\n\t\t{\n\t\t\toffsets[i] = unsigned(data_size);\n\t\t\tdata_size += meshopt_opacityMapEntrySize(levels[i], states);\n\t\t}\n\n\t\tstd::vector data(data_size);\n\n\t\tfor (size_t i = 0; i < omm_count; ++i)\n\t\t{\n\t\t\tunsigned int tri = sources[i];\n\t\t\tassert(tri < triangle_count);\n\n\t\t\tconst float* uv0 = &uvs[indices[tri * 3 + 0] * 2];\n\t\t\tconst float* uv1 = &uvs[indices[tri * 3 + 1] * 2];\n\t\t\tconst float* uv2 = &uvs[indices[tri * 3 + 2] * 2];\n\n\t\t\tmeshopt_opacityMapRasterize(&data[offsets[i]], levels[i], states, uv0, uv1, uv2, texture, 1, texture_size, texture_size, texture_size);\n\n\t\t\tsize_t micro_triangle_count = size_t(1) << (levels[i] * 2);\n\n\t\t\tfor (size_t j = 0; j < micro_triangle_count; ++j)\n\t\t\t{\n\t\t\t\tunsigned char byte = data[offsets[i] + (j >> (states == 2 ? 3 : 2))];\n\t\t\t\tint state = (byte >> (states == 2 ? j & 7 : (j & 3) * 2)) & (states - 1);\n\t\t\t\thistogram[k][state]++;\n\t\t\t}\n\t\t}\n\n\t\t// compact OMMs; note, this can be done per mesh but for optimal reuse this should be done for all meshes in model/scene at once\n\t\tsize_t compact_count = meshopt_opacityMapCompact(&data[0], data.size(), levels, &offsets[0], omm_count, omm_indices, triangle_count, states);\n\t\tassert(compact_count <= omm_count);\n\t\tdata.resize(compact_count == 0 ? 0 : offsets[compact_count - 1] + meshopt_opacityMapEntrySize(levels[compact_count - 1], states));\n\n\t\t// after compaction, some OMM indices may be replaced with a special index (-4..-1)\n\t\tfor (size_t i = 0; i < triangle_count; ++i)\n\t\t\tassert(omm_indices[i] < 0 || size_t(omm_indices[i]) < compact_count);\n\n\t\t// validate expected levels/special indices based on underlying test data; depends on implementation specifics, might change\n\t\tassert(levels[0] == 3 && levels[1] == 3); // note: OMM data got compacted so we only have 3-level OMMs left\n\t\tassert(omm_indices[0] == -1 && omm_indices[1] == -1 && omm_indices[2] == -1 && omm_indices[3] == -1);\n\t\tassert(compact_count == 1 && omm_indices[4] == 0 && omm_indices[5] == 0); // we force the two center triangles to use opposite orientations to make sure their data matches\n\t}\n\n\t// validate expected histogram based on underlying test data; depends on rasterization specifics, might change\n\tassert(histogram[0][0] == histogram[1][0] + histogram[1][2]);\n\tassert(histogram[0][1] == histogram[1][1] + histogram[1][3]);\n\n\tfloat opaque = float(histogram[0][1]) / float(histogram[0][0] + histogram[0][1]);\n\tfloat known = float(histogram[1][0] + histogram[1][1]) / float(histogram[1][0] + histogram[1][1] + histogram[1][2] + histogram[1][3]);\n\n\tassert(fabsf(opaque - 0.36f) < 1e-2f);\n\tassert(fabsf(known - 0.76f) < 1e-2f);\n}\n\nvoid runTests()\n{\n\tdecodeIndexV0();\n\tdecodeIndexV1();\n\tdecodeIndexV1More();\n\tdecodeIndexV1ThreeEdges();\n\tdecodeIndex16();\n\tencodeIndexMemorySafe();\n\tdecodeIndexMemorySafe();\n\tdecodeIndexRejectExtraBytes();\n\tdecodeIndexRejectMalformedHeaders();\n\tdecodeIndexRejectInvalidVersion();\n\tdecodeIndexMalformedVByte();\n\troundtripIndexTricky();\n\tencodeIndexEmpty();\n\n\tdecodeIndexSequence();\n\tdecodeIndexSequence16();\n\tencodeIndexSequenceMemorySafe();\n\tdecodeIndexSequenceMemorySafe();\n\tdecodeIndexSequenceRejectExtraBytes();\n\tdecodeIndexSequenceRejectMalformedHeaders();\n\tdecodeIndexSequenceRejectInvalidVersion();\n\tencodeIndexSequenceEmpty();\n\n\tdecodeVertexV0();\n\tdecodeVertexV0More();\n\tdecodeVertexV0Mode2();\n\tdecodeVertexV1();\n\tdecodeVertexV1Custom();\n\tdecodeVertexV1Deltas();\n\n\tfor (int version = 0; version <= 1; ++version)\n\t{\n\t\tmeshopt_encodeVertexVersion(version);\n\n\t\tdecodeVertexMemorySafe();\n\t\tdecodeVertexRejectExtraBytes();\n\t\tdecodeVertexRejectMalformedHeaders();\n\t\tdecodeVertexBitGroups();\n\t\tdecodeVertexBitGroupSentinels();\n\t\tdecodeVertexDeltas();\n\t\tdecodeVertexBitXor();\n\t\tdecodeVertexLarge();\n\t\tdecodeVertexSmall();\n\t\tencodeVertexEmpty();\n\t\tencodeVertexMemorySafe();\n\t}\n\n\tdecodeVersion();\n\n\tdecodeFilterOct8();\n\tdecodeFilterOct12();\n\tdecodeFilterQuat12();\n\tdecodeFilterExp();\n\n\tencodeFilterOct8();\n\tencodeFilterOct12();\n\tencodeFilterQuat12();\n\tencodeFilterExp();\n\tencodeFilterExpZero();\n\tencodeFilterExpAlias();\n\tencodeFilterExpClamp();\n\tencodeFilterColor8();\n\tencodeFilterColor12();\n\n\tclusterBoundsDegenerate();\n\tsphereBounds();\n\n\textractMeshlet();\n\n\tmeshletsEmpty();\n\tmeshletsDense();\n\tmeshletsSparse();\n\tmeshletsFlex();\n\tmeshletsMax();\n\tmeshletsSpatial();\n\tmeshletsSpatialDeep();\n\n\tpartitionBasic();\n\tpartitionSpatial();\n\tpartitionSpatialMerge();\n\n\tremapCustom();\n\n\tcustomAllocator();\n\n\temptyMesh();\n\n\tsimplify();\n\tsimplifyStuck();\n\tsimplifySloppyStuck();\n\tsimplifySloppyLocks();\n\tsimplifyPointsStuck();\n\tsimplifyFlip();\n\tsimplifyScale();\n\tsimplifyDegenerate();\n\tsimplifyLockBorder();\n\tsimplifyAttr(/* skip_g= */ false);\n\tsimplifyAttr(/* skip_g= */ true);\n\tsimplifyLockFlags();\n\tsimplifyLockFlagsSeam();\n\tsimplifySparse();\n\tsimplifyErrorAbsolute();\n\tsimplifySeam();\n\tsimplifySeamFake();\n\tsimplifySeamAttr();\n\tsimplifyDebug();\n\tsimplifyPrune();\n\tsimplifyPruneCleanup();\n\tsimplifyPruneFunc();\n\tsimplifyUpdate();\n\tsimplifyUpdateLocked(0);\n\tsimplifyUpdateLocked(meshopt_SimplifySparse);\n\n\tadjacency();\n\ttessellation();\n\tprovoking();\n\n\tquantizeFloat();\n\tquantizeHalf();\n\tdequantizeHalf();\n\n\tencodeMeshletBound();\n\tdecodeMeshletSafety();\n\tdecodeMeshletBasic();\n\tdecodeMeshletTypical();\n\n\topacityMap();\n}\n" }, { "path": "extern/.clang-format", "content": "DisableFormat: true\n" }, { "path": "extern/cgltf.h", "content": "/**\n * cgltf - a single-file glTF 2.0 parser written in C99.\n *\n * Version: 1.15\n *\n * Website: https://github.com/jkuhlmann/cgltf\n *\n * Distributed under the MIT License, see notice at the end of this file.\n *\n * Building:\n * Include this file where you need the struct and function\n * declarations. Have exactly one source file where you define\n * `CGLTF_IMPLEMENTATION` before including this file to get the\n * function definitions.\n *\n * Reference:\n * `cgltf_result cgltf_parse(const cgltf_options*, const void*,\n * cgltf_size, cgltf_data**)` parses both glTF and GLB data. If\n * this function returns `cgltf_result_success`, you have to call\n * `cgltf_free()` on the created `cgltf_data*` variable.\n * Note that contents of external files for buffers and images are not\n * automatically loaded. You'll need to read these files yourself using\n * URIs in the `cgltf_data` structure.\n *\n * `cgltf_options` is the struct passed to `cgltf_parse()` to control\n * parts of the parsing process. You can use it to force the file type\n * and provide memory allocation as well as file operation callbacks.\n * Should be zero-initialized to trigger default behavior.\n *\n * `cgltf_data` is the struct allocated and filled by `cgltf_parse()`.\n * It generally mirrors the glTF format as described by the spec (see\n * https://github.com/KhronosGroup/glTF/tree/master/specification/2.0).\n *\n * `void cgltf_free(cgltf_data*)` frees the allocated `cgltf_data`\n * variable.\n *\n * `cgltf_result cgltf_load_buffers(const cgltf_options*, cgltf_data*,\n * const char* gltf_path)` can be optionally called to open and read buffer\n * files using the `FILE*` APIs. The `gltf_path` argument is the path to\n * the original glTF file, which allows the parser to resolve the path to\n * buffer files.\n *\n * `cgltf_result cgltf_load_buffer_base64(const cgltf_options* options,\n * cgltf_size size, const char* base64, void** out_data)` decodes\n * base64-encoded data content. Used internally by `cgltf_load_buffers()`.\n * This is useful when decoding data URIs in images.\n *\n * `cgltf_result cgltf_parse_file(const cgltf_options* options, const\n * char* path, cgltf_data** out_data)` can be used to open the given\n * file using `FILE*` APIs and parse the data using `cgltf_parse()`.\n *\n * `cgltf_result cgltf_validate(cgltf_data*)` can be used to do additional\n * checks to make sure the parsed glTF data is valid.\n *\n * `cgltf_node_transform_local` converts the translation / rotation / scale properties of a node\n * into a mat4.\n *\n * `cgltf_node_transform_world` calls `cgltf_node_transform_local` on every ancestor in order\n * to compute the root-to-node transformation.\n *\n * `cgltf_accessor_unpack_floats` reads in the data from an accessor, applies sparse data (if any),\n * and converts them to floating point. Assumes that `cgltf_load_buffers` has already been called.\n * By passing null for the output pointer, users can find out how many floats are required in the\n * output buffer.\n *\n * `cgltf_accessor_unpack_indices` reads in the index data from an accessor. Assumes that\n * `cgltf_load_buffers` has already been called. By passing null for the output pointer, users can\n * find out how many indices are required in the output buffer. Returns 0 if the accessor is\n * sparse or if the output component size is less than the accessor's component size.\n *\n * `cgltf_num_components` is a tiny utility that tells you the dimensionality of\n * a certain accessor type. This can be used before `cgltf_accessor_unpack_floats` to help allocate\n * the necessary amount of memory. `cgltf_component_size` and `cgltf_calc_size` exist for\n * similar purposes.\n *\n * `cgltf_accessor_read_float` reads a certain element from a non-sparse accessor and converts it to\n * floating point, assuming that `cgltf_load_buffers` has already been called. The passed-in element\n * size is the number of floats in the output buffer, which should be in the range [1, 16]. Returns\n * false if the passed-in element_size is too small, or if the accessor is sparse.\n *\n * `cgltf_accessor_read_uint` is similar to its floating-point counterpart, but limited to reading\n * vector types and does not support matrix types. The passed-in element size is the number of uints\n * in the output buffer, which should be in the range [1, 4]. Returns false if the passed-in\n * element_size is too small, or if the accessor is sparse.\n *\n * `cgltf_accessor_read_index` is similar to its floating-point counterpart, but it returns size_t\n * and only works with single-component data types.\n *\n * `cgltf_copy_extras_json` allows users to retrieve the \"extras\" data that can be attached to many\n * glTF objects (which can be arbitrary JSON data). This is a legacy function, consider using\n * cgltf_extras::data directly instead. You can parse this data using your own JSON parser\n * or, if you've included the cgltf implementation using the integrated JSMN JSON parser.\n */\n#ifndef CGLTF_H_INCLUDED__\n#define CGLTF_H_INCLUDED__\n\n#include \n#include /* For uint8_t, uint32_t */\n\n#ifdef __cplusplus\nextern \"C\" {\n#endif\n\ntypedef size_t cgltf_size;\ntypedef long long int cgltf_ssize;\ntypedef float cgltf_float;\ntypedef int cgltf_int;\ntypedef unsigned int cgltf_uint;\ntypedef int cgltf_bool;\n\ntypedef enum cgltf_file_type\n{\n\tcgltf_file_type_invalid,\n\tcgltf_file_type_gltf,\n\tcgltf_file_type_glb,\n\tcgltf_file_type_max_enum\n} cgltf_file_type;\n\ntypedef enum cgltf_result\n{\n\tcgltf_result_success,\n\tcgltf_result_data_too_short,\n\tcgltf_result_unknown_format,\n\tcgltf_result_invalid_json,\n\tcgltf_result_invalid_gltf,\n\tcgltf_result_invalid_options,\n\tcgltf_result_file_not_found,\n\tcgltf_result_io_error,\n\tcgltf_result_out_of_memory,\n\tcgltf_result_legacy_gltf,\n cgltf_result_max_enum\n} cgltf_result;\n\ntypedef struct cgltf_memory_options\n{\n\tvoid* (*alloc_func)(void* user, cgltf_size size);\n\tvoid (*free_func) (void* user, void* ptr);\n\tvoid* user_data;\n} cgltf_memory_options;\n\ntypedef struct cgltf_file_options\n{\n\tcgltf_result(*read)(const struct cgltf_memory_options* memory_options, const struct cgltf_file_options* file_options, const char* path, cgltf_size* size, void** data);\n\tvoid (*release)(const struct cgltf_memory_options* memory_options, const struct cgltf_file_options* file_options, void* data, cgltf_size size);\n\tvoid* user_data;\n} cgltf_file_options;\n\ntypedef struct cgltf_options\n{\n\tcgltf_file_type type; /* invalid == auto detect */\n\tcgltf_size json_token_count; /* 0 == auto */\n\tcgltf_memory_options memory;\n\tcgltf_file_options file;\n} cgltf_options;\n\ntypedef enum cgltf_buffer_view_type\n{\n\tcgltf_buffer_view_type_invalid,\n\tcgltf_buffer_view_type_indices,\n\tcgltf_buffer_view_type_vertices,\n\tcgltf_buffer_view_type_max_enum\n} cgltf_buffer_view_type;\n\ntypedef enum cgltf_attribute_type\n{\n\tcgltf_attribute_type_invalid,\n\tcgltf_attribute_type_position,\n\tcgltf_attribute_type_normal,\n\tcgltf_attribute_type_tangent,\n\tcgltf_attribute_type_texcoord,\n\tcgltf_attribute_type_color,\n\tcgltf_attribute_type_joints,\n\tcgltf_attribute_type_weights,\n\tcgltf_attribute_type_custom,\n\tcgltf_attribute_type_max_enum\n} cgltf_attribute_type;\n\ntypedef enum cgltf_component_type\n{\n\tcgltf_component_type_invalid,\n\tcgltf_component_type_r_8, /* BYTE */\n\tcgltf_component_type_r_8u, /* UNSIGNED_BYTE */\n\tcgltf_component_type_r_16, /* SHORT */\n\tcgltf_component_type_r_16u, /* UNSIGNED_SHORT */\n\tcgltf_component_type_r_32u, /* UNSIGNED_INT */\n\tcgltf_component_type_r_32f, /* FLOAT */\n cgltf_component_type_max_enum\n} cgltf_component_type;\n\ntypedef enum cgltf_type\n{\n\tcgltf_type_invalid,\n\tcgltf_type_scalar,\n\tcgltf_type_vec2,\n\tcgltf_type_vec3,\n\tcgltf_type_vec4,\n\tcgltf_type_mat2,\n\tcgltf_type_mat3,\n\tcgltf_type_mat4,\n\tcgltf_type_max_enum\n} cgltf_type;\n\ntypedef enum cgltf_primitive_type\n{\n\tcgltf_primitive_type_invalid,\n\tcgltf_primitive_type_points,\n\tcgltf_primitive_type_lines,\n\tcgltf_primitive_type_line_loop,\n\tcgltf_primitive_type_line_strip,\n\tcgltf_primitive_type_triangles,\n\tcgltf_primitive_type_triangle_strip,\n\tcgltf_primitive_type_triangle_fan,\n\tcgltf_primitive_type_max_enum\n} cgltf_primitive_type;\n\ntypedef enum cgltf_alpha_mode\n{\n\tcgltf_alpha_mode_opaque,\n\tcgltf_alpha_mode_mask,\n\tcgltf_alpha_mode_blend,\n\tcgltf_alpha_mode_max_enum\n} cgltf_alpha_mode;\n\ntypedef enum cgltf_animation_path_type {\n\tcgltf_animation_path_type_invalid,\n\tcgltf_animation_path_type_translation,\n\tcgltf_animation_path_type_rotation,\n\tcgltf_animation_path_type_scale,\n\tcgltf_animation_path_type_weights,\n\tcgltf_animation_path_type_max_enum\n} cgltf_animation_path_type;\n\ntypedef enum cgltf_interpolation_type {\n\tcgltf_interpolation_type_linear,\n\tcgltf_interpolation_type_step,\n\tcgltf_interpolation_type_cubic_spline,\n\tcgltf_interpolation_type_max_enum\n} cgltf_interpolation_type;\n\ntypedef enum cgltf_camera_type {\n\tcgltf_camera_type_invalid,\n\tcgltf_camera_type_perspective,\n\tcgltf_camera_type_orthographic,\n\tcgltf_camera_type_max_enum\n} cgltf_camera_type;\n\ntypedef enum cgltf_light_type {\n\tcgltf_light_type_invalid,\n\tcgltf_light_type_directional,\n\tcgltf_light_type_point,\n\tcgltf_light_type_spot,\n\tcgltf_light_type_max_enum\n} cgltf_light_type;\n\ntypedef enum cgltf_data_free_method {\n\tcgltf_data_free_method_none,\n\tcgltf_data_free_method_file_release,\n\tcgltf_data_free_method_memory_free,\n\tcgltf_data_free_method_max_enum\n} cgltf_data_free_method;\n\ntypedef struct cgltf_extras {\n\tcgltf_size start_offset; /* this field is deprecated and will be removed in the future; use data instead */\n\tcgltf_size end_offset; /* this field is deprecated and will be removed in the future; use data instead */\n\n\tchar* data;\n} cgltf_extras;\n\ntypedef struct cgltf_extension {\n\tchar* name;\n\tchar* data;\n} cgltf_extension;\n\ntypedef struct cgltf_buffer\n{\n\tchar* name;\n\tcgltf_size size;\n\tchar* uri;\n\tvoid* data; /* loaded by cgltf_load_buffers */\n\tcgltf_data_free_method data_free_method;\n\tcgltf_extras extras;\n\tcgltf_size extensions_count;\n\tcgltf_extension* extensions;\n} cgltf_buffer;\n\ntypedef enum cgltf_meshopt_compression_mode {\n\tcgltf_meshopt_compression_mode_invalid,\n\tcgltf_meshopt_compression_mode_attributes,\n\tcgltf_meshopt_compression_mode_triangles,\n\tcgltf_meshopt_compression_mode_indices,\n\tcgltf_meshopt_compression_mode_max_enum\n} cgltf_meshopt_compression_mode;\n\ntypedef enum cgltf_meshopt_compression_filter {\n\tcgltf_meshopt_compression_filter_none,\n\tcgltf_meshopt_compression_filter_octahedral,\n\tcgltf_meshopt_compression_filter_quaternion,\n\tcgltf_meshopt_compression_filter_exponential,\n\tcgltf_meshopt_compression_filter_color,\n\tcgltf_meshopt_compression_filter_max_enum\n} cgltf_meshopt_compression_filter;\n\ntypedef struct cgltf_meshopt_compression\n{\n\tcgltf_buffer* buffer;\n\tcgltf_size offset;\n\tcgltf_size size;\n\tcgltf_size stride;\n\tcgltf_size count;\n\tcgltf_meshopt_compression_mode mode;\n\tcgltf_meshopt_compression_filter filter;\n\tcgltf_bool is_khr;\n} cgltf_meshopt_compression;\n\ntypedef struct cgltf_buffer_view\n{\n\tchar *name;\n\tcgltf_buffer* buffer;\n\tcgltf_size offset;\n\tcgltf_size size;\n\tcgltf_size stride; /* 0 == automatically determined by accessor */\n\tcgltf_buffer_view_type type;\n\tvoid* data; /* overrides buffer->data if present, filled by extensions */\n\tcgltf_bool has_meshopt_compression;\n\tcgltf_meshopt_compression meshopt_compression;\n\tcgltf_extras extras;\n\tcgltf_size extensions_count;\n\tcgltf_extension* extensions;\n} cgltf_buffer_view;\n\ntypedef struct cgltf_accessor_sparse\n{\n\tcgltf_size count;\n\tcgltf_buffer_view* indices_buffer_view;\n\tcgltf_size indices_byte_offset;\n\tcgltf_component_type indices_component_type;\n\tcgltf_buffer_view* values_buffer_view;\n\tcgltf_size values_byte_offset;\n} cgltf_accessor_sparse;\n\ntypedef struct cgltf_accessor\n{\n\tchar* name;\n\tcgltf_component_type component_type;\n\tcgltf_bool normalized;\n\tcgltf_type type;\n\tcgltf_size offset;\n\tcgltf_size count;\n\tcgltf_size stride;\n\tcgltf_buffer_view* buffer_view;\n\tcgltf_bool has_min;\n\tcgltf_float min[16];\n\tcgltf_bool has_max;\n\tcgltf_float max[16];\n\tcgltf_bool is_sparse;\n\tcgltf_accessor_sparse sparse;\n\tcgltf_extras extras;\n\tcgltf_size extensions_count;\n\tcgltf_extension* extensions;\n} cgltf_accessor;\n\ntypedef struct cgltf_attribute\n{\n\tchar* name;\n\tcgltf_attribute_type type;\n\tcgltf_int index;\n\tcgltf_accessor* data;\n} cgltf_attribute;\n\ntypedef struct cgltf_image\n{\n\tchar* name;\n\tchar* uri;\n\tcgltf_buffer_view* buffer_view;\n\tchar* mime_type;\n\tcgltf_extras extras;\n\tcgltf_size extensions_count;\n\tcgltf_extension* extensions;\n} cgltf_image;\n\ntypedef enum cgltf_filter_type {\n cgltf_filter_type_undefined = 0,\n cgltf_filter_type_nearest = 9728,\n cgltf_filter_type_linear = 9729,\n cgltf_filter_type_nearest_mipmap_nearest = 9984,\n cgltf_filter_type_linear_mipmap_nearest = 9985,\n cgltf_filter_type_nearest_mipmap_linear = 9986,\n cgltf_filter_type_linear_mipmap_linear = 9987\n} cgltf_filter_type;\n\ntypedef enum cgltf_wrap_mode {\n cgltf_wrap_mode_clamp_to_edge = 33071,\n cgltf_wrap_mode_mirrored_repeat = 33648,\n cgltf_wrap_mode_repeat = 10497\n} cgltf_wrap_mode;\n\ntypedef struct cgltf_sampler\n{\n\tchar* name;\n\tcgltf_filter_type mag_filter;\n\tcgltf_filter_type min_filter;\n\tcgltf_wrap_mode wrap_s;\n\tcgltf_wrap_mode wrap_t;\n\tcgltf_extras extras;\n\tcgltf_size extensions_count;\n\tcgltf_extension* extensions;\n} cgltf_sampler;\n\ntypedef struct cgltf_texture\n{\n\tchar* name;\n\tcgltf_image* image;\n\tcgltf_sampler* sampler;\n\tcgltf_bool has_basisu;\n\tcgltf_image* basisu_image;\n\tcgltf_bool has_webp;\n\tcgltf_image* webp_image;\n\tcgltf_extras extras;\n\tcgltf_size extensions_count;\n\tcgltf_extension* extensions;\n} cgltf_texture;\n\ntypedef struct cgltf_texture_transform\n{\n\tcgltf_float offset[2];\n\tcgltf_float rotation;\n\tcgltf_float scale[2];\n\tcgltf_bool has_texcoord;\n\tcgltf_int texcoord;\n} cgltf_texture_transform;\n\ntypedef struct cgltf_texture_view\n{\n\tcgltf_texture* texture;\n\tcgltf_int texcoord;\n\tcgltf_float scale; /* equivalent to strength for occlusion_texture */\n\tcgltf_bool has_transform;\n\tcgltf_texture_transform transform;\n} cgltf_texture_view;\n\ntypedef struct cgltf_pbr_metallic_roughness\n{\n\tcgltf_texture_view base_color_texture;\n\tcgltf_texture_view metallic_roughness_texture;\n\n\tcgltf_float base_color_factor[4];\n\tcgltf_float metallic_factor;\n\tcgltf_float roughness_factor;\n} cgltf_pbr_metallic_roughness;\n\ntypedef struct cgltf_pbr_specular_glossiness\n{\n\tcgltf_texture_view diffuse_texture;\n\tcgltf_texture_view specular_glossiness_texture;\n\n\tcgltf_float diffuse_factor[4];\n\tcgltf_float specular_factor[3];\n\tcgltf_float glossiness_factor;\n} cgltf_pbr_specular_glossiness;\n\ntypedef struct cgltf_clearcoat\n{\n\tcgltf_texture_view clearcoat_texture;\n\tcgltf_texture_view clearcoat_roughness_texture;\n\tcgltf_texture_view clearcoat_normal_texture;\n\n\tcgltf_float clearcoat_factor;\n\tcgltf_float clearcoat_roughness_factor;\n} cgltf_clearcoat;\n\ntypedef struct cgltf_transmission\n{\n\tcgltf_texture_view transmission_texture;\n\tcgltf_float transmission_factor;\n} cgltf_transmission;\n\ntypedef struct cgltf_ior\n{\n\tcgltf_float ior;\n} cgltf_ior;\n\ntypedef struct cgltf_specular\n{\n\tcgltf_texture_view specular_texture;\n\tcgltf_texture_view specular_color_texture;\n\tcgltf_float specular_color_factor[3];\n\tcgltf_float specular_factor;\n} cgltf_specular;\n\ntypedef struct cgltf_volume\n{\n\tcgltf_texture_view thickness_texture;\n\tcgltf_float thickness_factor;\n\tcgltf_float attenuation_color[3];\n\tcgltf_float attenuation_distance;\n} cgltf_volume;\n\ntypedef struct cgltf_sheen\n{\n\tcgltf_texture_view sheen_color_texture;\n\tcgltf_float sheen_color_factor[3];\n\tcgltf_texture_view sheen_roughness_texture;\n\tcgltf_float sheen_roughness_factor;\n} cgltf_sheen;\n\ntypedef struct cgltf_emissive_strength\n{\n\tcgltf_float emissive_strength;\n} cgltf_emissive_strength;\n\ntypedef struct cgltf_iridescence\n{\n\tcgltf_float iridescence_factor;\n\tcgltf_texture_view iridescence_texture;\n\tcgltf_float iridescence_ior;\n\tcgltf_float iridescence_thickness_min;\n\tcgltf_float iridescence_thickness_max;\n\tcgltf_texture_view iridescence_thickness_texture;\n} cgltf_iridescence;\n\ntypedef struct cgltf_diffuse_transmission\n{\n\tcgltf_texture_view diffuse_transmission_texture;\n\tcgltf_float diffuse_transmission_factor;\n\tcgltf_float diffuse_transmission_color_factor[3];\n\tcgltf_texture_view diffuse_transmission_color_texture;\n} cgltf_diffuse_transmission;\n\ntypedef struct cgltf_anisotropy\n{\n\tcgltf_float anisotropy_strength;\n\tcgltf_float anisotropy_rotation;\n\tcgltf_texture_view anisotropy_texture;\n} cgltf_anisotropy;\n\ntypedef struct cgltf_dispersion\n{\n\tcgltf_float dispersion;\n} cgltf_dispersion;\n\ntypedef struct cgltf_material\n{\n\tchar* name;\n\tcgltf_bool has_pbr_metallic_roughness;\n\tcgltf_bool has_pbr_specular_glossiness;\n\tcgltf_bool has_clearcoat;\n\tcgltf_bool has_transmission;\n\tcgltf_bool has_volume;\n\tcgltf_bool has_ior;\n\tcgltf_bool has_specular;\n\tcgltf_bool has_sheen;\n\tcgltf_bool has_emissive_strength;\n\tcgltf_bool has_iridescence;\n\tcgltf_bool has_diffuse_transmission;\n\tcgltf_bool has_anisotropy;\n\tcgltf_bool has_dispersion;\n\tcgltf_pbr_metallic_roughness pbr_metallic_roughness;\n\tcgltf_pbr_specular_glossiness pbr_specular_glossiness;\n\tcgltf_clearcoat clearcoat;\n\tcgltf_ior ior;\n\tcgltf_specular specular;\n\tcgltf_sheen sheen;\n\tcgltf_transmission transmission;\n\tcgltf_volume volume;\n\tcgltf_emissive_strength emissive_strength;\n\tcgltf_iridescence iridescence;\n\tcgltf_diffuse_transmission diffuse_transmission;\n\tcgltf_anisotropy anisotropy;\n\tcgltf_dispersion dispersion;\n\tcgltf_texture_view normal_texture;\n\tcgltf_texture_view occlusion_texture;\n\tcgltf_texture_view emissive_texture;\n\tcgltf_float emissive_factor[3];\n\tcgltf_alpha_mode alpha_mode;\n\tcgltf_float alpha_cutoff;\n\tcgltf_bool double_sided;\n\tcgltf_bool unlit;\n\tcgltf_extras extras;\n\tcgltf_size extensions_count;\n\tcgltf_extension* extensions;\n} cgltf_material;\n\ntypedef struct cgltf_material_mapping\n{\n\tcgltf_size variant;\n\tcgltf_material* material;\n\tcgltf_extras extras;\n} cgltf_material_mapping;\n\ntypedef struct cgltf_morph_target {\n\tcgltf_attribute* attributes;\n\tcgltf_size attributes_count;\n} cgltf_morph_target;\n\ntypedef struct cgltf_draco_mesh_compression {\n\tcgltf_buffer_view* buffer_view;\n\tcgltf_attribute* attributes;\n\tcgltf_size attributes_count;\n} cgltf_draco_mesh_compression;\n\ntypedef struct cgltf_mesh_gpu_instancing {\n\tcgltf_attribute* attributes;\n\tcgltf_size attributes_count;\n} cgltf_mesh_gpu_instancing;\n\ntypedef struct cgltf_primitive {\n\tcgltf_primitive_type type;\n\tcgltf_accessor* indices;\n\tcgltf_material* material;\n\tcgltf_attribute* attributes;\n\tcgltf_size attributes_count;\n\tcgltf_morph_target* targets;\n\tcgltf_size targets_count;\n\tcgltf_extras extras;\n\tcgltf_bool has_draco_mesh_compression;\n\tcgltf_draco_mesh_compression draco_mesh_compression;\n\tcgltf_material_mapping* mappings;\n\tcgltf_size mappings_count;\n\tcgltf_size extensions_count;\n\tcgltf_extension* extensions;\n} cgltf_primitive;\n\ntypedef struct cgltf_mesh {\n\tchar* name;\n\tcgltf_primitive* primitives;\n\tcgltf_size primitives_count;\n\tcgltf_float* weights;\n\tcgltf_size weights_count;\n\tchar** target_names;\n\tcgltf_size target_names_count;\n\tcgltf_extras extras;\n\tcgltf_size extensions_count;\n\tcgltf_extension* extensions;\n} cgltf_mesh;\n\ntypedef struct cgltf_node cgltf_node;\n\ntypedef struct cgltf_skin {\n\tchar* name;\n\tcgltf_node** joints;\n\tcgltf_size joints_count;\n\tcgltf_node* skeleton;\n\tcgltf_accessor* inverse_bind_matrices;\n\tcgltf_extras extras;\n\tcgltf_size extensions_count;\n\tcgltf_extension* extensions;\n} cgltf_skin;\n\ntypedef struct cgltf_camera_perspective {\n\tcgltf_bool has_aspect_ratio;\n\tcgltf_float aspect_ratio;\n\tcgltf_float yfov;\n\tcgltf_bool has_zfar;\n\tcgltf_float zfar;\n\tcgltf_float znear;\n\tcgltf_extras extras;\n} cgltf_camera_perspective;\n\ntypedef struct cgltf_camera_orthographic {\n\tcgltf_float xmag;\n\tcgltf_float ymag;\n\tcgltf_float zfar;\n\tcgltf_float znear;\n\tcgltf_extras extras;\n} cgltf_camera_orthographic;\n\ntypedef struct cgltf_camera {\n\tchar* name;\n\tcgltf_camera_type type;\n\tunion {\n\t\tcgltf_camera_perspective perspective;\n\t\tcgltf_camera_orthographic orthographic;\n\t} data;\n\tcgltf_extras extras;\n\tcgltf_size extensions_count;\n\tcgltf_extension* extensions;\n} cgltf_camera;\n\ntypedef struct cgltf_light {\n\tchar* name;\n\tcgltf_float color[3];\n\tcgltf_float intensity;\n\tcgltf_light_type type;\n\tcgltf_float range;\n\tcgltf_float spot_inner_cone_angle;\n\tcgltf_float spot_outer_cone_angle;\n\tcgltf_extras extras;\n} cgltf_light;\n\nstruct cgltf_node {\n\tchar* name;\n\tcgltf_node* parent;\n\tcgltf_node** children;\n\tcgltf_size children_count;\n\tcgltf_skin* skin;\n\tcgltf_mesh* mesh;\n\tcgltf_camera* camera;\n\tcgltf_light* light;\n\tcgltf_float* weights;\n\tcgltf_size weights_count;\n\tcgltf_bool has_translation;\n\tcgltf_bool has_rotation;\n\tcgltf_bool has_scale;\n\tcgltf_bool has_matrix;\n\tcgltf_float translation[3];\n\tcgltf_float rotation[4];\n\tcgltf_float scale[3];\n\tcgltf_float matrix[16];\n\tcgltf_extras extras;\n\tcgltf_bool has_mesh_gpu_instancing;\n\tcgltf_mesh_gpu_instancing mesh_gpu_instancing;\n\tcgltf_size extensions_count;\n\tcgltf_extension* extensions;\n};\n\ntypedef struct cgltf_scene {\n\tchar* name;\n\tcgltf_node** nodes;\n\tcgltf_size nodes_count;\n\tcgltf_extras extras;\n\tcgltf_size extensions_count;\n\tcgltf_extension* extensions;\n} cgltf_scene;\n\ntypedef struct cgltf_animation_sampler {\n\tcgltf_accessor* input;\n\tcgltf_accessor* output;\n\tcgltf_interpolation_type interpolation;\n\tcgltf_extras extras;\n\tcgltf_size extensions_count;\n\tcgltf_extension* extensions;\n} cgltf_animation_sampler;\n\ntypedef struct cgltf_animation_channel {\n\tcgltf_animation_sampler* sampler;\n\tcgltf_node* target_node;\n\tcgltf_animation_path_type target_path;\n\tcgltf_extras extras;\n\tcgltf_size extensions_count;\n\tcgltf_extension* extensions;\n} cgltf_animation_channel;\n\ntypedef struct cgltf_animation {\n\tchar* name;\n\tcgltf_animation_sampler* samplers;\n\tcgltf_size samplers_count;\n\tcgltf_animation_channel* channels;\n\tcgltf_size channels_count;\n\tcgltf_extras extras;\n\tcgltf_size extensions_count;\n\tcgltf_extension* extensions;\n} cgltf_animation;\n\ntypedef struct cgltf_material_variant\n{\n\tchar* name;\n\tcgltf_extras extras;\n} cgltf_material_variant;\n\ntypedef struct cgltf_asset {\n\tchar* copyright;\n\tchar* generator;\n\tchar* version;\n\tchar* min_version;\n\tcgltf_extras extras;\n\tcgltf_size extensions_count;\n\tcgltf_extension* extensions;\n} cgltf_asset;\n\ntypedef struct cgltf_data\n{\n\tcgltf_file_type file_type;\n\tvoid* file_data;\n\tcgltf_size file_size;\n\n\tcgltf_asset asset;\n\n\tcgltf_mesh* meshes;\n\tcgltf_size meshes_count;\n\n\tcgltf_material* materials;\n\tcgltf_size materials_count;\n\n\tcgltf_accessor* accessors;\n\tcgltf_size accessors_count;\n\n\tcgltf_buffer_view* buffer_views;\n\tcgltf_size buffer_views_count;\n\n\tcgltf_buffer* buffers;\n\tcgltf_size buffers_count;\n\n\tcgltf_image* images;\n\tcgltf_size images_count;\n\n\tcgltf_texture* textures;\n\tcgltf_size textures_count;\n\n\tcgltf_sampler* samplers;\n\tcgltf_size samplers_count;\n\n\tcgltf_skin* skins;\n\tcgltf_size skins_count;\n\n\tcgltf_camera* cameras;\n\tcgltf_size cameras_count;\n\n\tcgltf_light* lights;\n\tcgltf_size lights_count;\n\n\tcgltf_node* nodes;\n\tcgltf_size nodes_count;\n\n\tcgltf_scene* scenes;\n\tcgltf_size scenes_count;\n\n\tcgltf_scene* scene;\n\n\tcgltf_animation* animations;\n\tcgltf_size animations_count;\n\n\tcgltf_material_variant* variants;\n\tcgltf_size variants_count;\n\n\tcgltf_extras extras;\n\n\tcgltf_size data_extensions_count;\n\tcgltf_extension* data_extensions;\n\n\tchar** extensions_used;\n\tcgltf_size extensions_used_count;\n\n\tchar** extensions_required;\n\tcgltf_size extensions_required_count;\n\n\tconst char* json;\n\tcgltf_size json_size;\n\n\tconst void* bin;\n\tcgltf_size bin_size;\n\n\tcgltf_memory_options memory;\n\tcgltf_file_options file;\n} cgltf_data;\n\ncgltf_result cgltf_parse(\n\t\tconst cgltf_options* options,\n\t\tconst void* data,\n\t\tcgltf_size size,\n\t\tcgltf_data** out_data);\n\ncgltf_result cgltf_parse_file(\n\t\tconst cgltf_options* options,\n\t\tconst char* path,\n\t\tcgltf_data** out_data);\n\ncgltf_result cgltf_load_buffers(\n\t\tconst cgltf_options* options,\n\t\tcgltf_data* data,\n\t\tconst char* gltf_path);\n\ncgltf_result cgltf_load_buffer_base64(const cgltf_options* options, cgltf_size size, const char* base64, void** out_data);\n\ncgltf_size cgltf_decode_string(char* string);\ncgltf_size cgltf_decode_uri(char* uri);\n\ncgltf_result cgltf_validate(cgltf_data* data);\n\nvoid cgltf_free(cgltf_data* data);\n\nvoid cgltf_node_transform_local(const cgltf_node* node, cgltf_float* out_matrix);\nvoid cgltf_node_transform_world(const cgltf_node* node, cgltf_float* out_matrix);\n\nconst uint8_t* cgltf_buffer_view_data(const cgltf_buffer_view* view);\n\nconst cgltf_accessor* cgltf_find_accessor(const cgltf_primitive* prim, cgltf_attribute_type type, cgltf_int index);\n\ncgltf_bool cgltf_accessor_read_float(const cgltf_accessor* accessor, cgltf_size index, cgltf_float* out, cgltf_size element_size);\ncgltf_bool cgltf_accessor_read_uint(const cgltf_accessor* accessor, cgltf_size index, cgltf_uint* out, cgltf_size element_size);\ncgltf_size cgltf_accessor_read_index(const cgltf_accessor* accessor, cgltf_size index);\n\ncgltf_size cgltf_num_components(cgltf_type type);\ncgltf_size cgltf_component_size(cgltf_component_type component_type);\ncgltf_size cgltf_calc_size(cgltf_type type, cgltf_component_type component_type);\n\ncgltf_size cgltf_accessor_unpack_floats(const cgltf_accessor* accessor, cgltf_float* out, cgltf_size float_count);\ncgltf_size cgltf_accessor_unpack_indices(const cgltf_accessor* accessor, void* out, cgltf_size out_component_size, cgltf_size index_count);\n\n/* this function is deprecated and will be removed in the future; use cgltf_extras::data instead */\ncgltf_result cgltf_copy_extras_json(const cgltf_data* data, const cgltf_extras* extras, char* dest, cgltf_size* dest_size);\n\ncgltf_size cgltf_mesh_index(const cgltf_data* data, const cgltf_mesh* object);\ncgltf_size cgltf_material_index(const cgltf_data* data, const cgltf_material* object);\ncgltf_size cgltf_accessor_index(const cgltf_data* data, const cgltf_accessor* object);\ncgltf_size cgltf_buffer_view_index(const cgltf_data* data, const cgltf_buffer_view* object);\ncgltf_size cgltf_buffer_index(const cgltf_data* data, const cgltf_buffer* object);\ncgltf_size cgltf_image_index(const cgltf_data* data, const cgltf_image* object);\ncgltf_size cgltf_texture_index(const cgltf_data* data, const cgltf_texture* object);\ncgltf_size cgltf_sampler_index(const cgltf_data* data, const cgltf_sampler* object);\ncgltf_size cgltf_skin_index(const cgltf_data* data, const cgltf_skin* object);\ncgltf_size cgltf_camera_index(const cgltf_data* data, const cgltf_camera* object);\ncgltf_size cgltf_light_index(const cgltf_data* data, const cgltf_light* object);\ncgltf_size cgltf_node_index(const cgltf_data* data, const cgltf_node* object);\ncgltf_size cgltf_scene_index(const cgltf_data* data, const cgltf_scene* object);\ncgltf_size cgltf_animation_index(const cgltf_data* data, const cgltf_animation* object);\ncgltf_size cgltf_animation_sampler_index(const cgltf_animation* animation, const cgltf_animation_sampler* object);\ncgltf_size cgltf_animation_channel_index(const cgltf_animation* animation, const cgltf_animation_channel* object);\n\n#ifdef __cplusplus\n}\n#endif\n\n#endif /* #ifndef CGLTF_H_INCLUDED__ */\n\n/*\n *\n * Stop now, if you are only interested in the API.\n * Below, you find the implementation.\n *\n */\n\n#if defined(__INTELLISENSE__) || defined(__JETBRAINS_IDE__)\n/* This makes MSVC/CLion intellisense work. */\n#define CGLTF_IMPLEMENTATION\n#endif\n\n#ifdef CGLTF_IMPLEMENTATION\n\n#include /* For assert */\n#include /* For strncpy */\n#include /* For fopen */\n#include /* For UINT_MAX etc */\n#include /* For FLT_MAX */\n\n#if !defined(CGLTF_MALLOC) || !defined(CGLTF_FREE) || !defined(CGLTF_ATOI) || !defined(CGLTF_ATOF) || !defined(CGLTF_ATOLL)\n#include /* For malloc, free, atoi, atof */\n#endif\n\n/* JSMN_PARENT_LINKS is necessary to make parsing large structures linear in input size */\n#define JSMN_PARENT_LINKS\n\n/* JSMN_STRICT is necessary to reject invalid JSON documents */\n#define JSMN_STRICT\n\n/*\n * -- jsmn.h start --\n * Source: https://github.com/zserge/jsmn\n * License: MIT\n */\ntypedef enum {\n\tJSMN_UNDEFINED = 0,\n\tJSMN_OBJECT = 1,\n\tJSMN_ARRAY = 2,\n\tJSMN_STRING = 3,\n\tJSMN_PRIMITIVE = 4\n} jsmntype_t;\nenum jsmnerr {\n\t/* Not enough tokens were provided */\n\tJSMN_ERROR_NOMEM = -1,\n\t/* Invalid character inside JSON string */\n\tJSMN_ERROR_INVAL = -2,\n\t/* The string is not a full JSON packet, more bytes expected */\n\tJSMN_ERROR_PART = -3\n};\ntypedef struct {\n\tjsmntype_t type;\n\tptrdiff_t start;\n\tptrdiff_t end;\n\tint size;\n#ifdef JSMN_PARENT_LINKS\n\tint parent;\n#endif\n} jsmntok_t;\ntypedef struct {\n\tsize_t pos; /* offset in the JSON string */\n\tunsigned int toknext; /* next token to allocate */\n\tint toksuper; /* superior token node, e.g parent object or array */\n} jsmn_parser;\nstatic void jsmn_init(jsmn_parser *parser);\nstatic int jsmn_parse(jsmn_parser *parser, const char *js, size_t len, jsmntok_t *tokens, size_t num_tokens);\n/*\n * -- jsmn.h end --\n */\n\n\n#ifndef CGLTF_CONSTS\n#define GlbHeaderSize 12\n#define GlbChunkHeaderSize 8\nstatic const uint32_t GlbVersion = 2;\nstatic const uint32_t GlbMagic = 0x46546C67;\nstatic const uint32_t GlbMagicJsonChunk = 0x4E4F534A;\nstatic const uint32_t GlbMagicBinChunk = 0x004E4942;\n#define CGLTF_CONSTS\n#endif\n\n#ifndef CGLTF_MALLOC\n#define CGLTF_MALLOC(size) malloc(size)\n#endif\n#ifndef CGLTF_FREE\n#define CGLTF_FREE(ptr) free(ptr)\n#endif\n#ifndef CGLTF_ATOI\n#define CGLTF_ATOI(str) atoi(str)\n#endif\n#ifndef CGLTF_ATOF\n#define CGLTF_ATOF(str) atof(str)\n#endif\n#ifndef CGLTF_ATOLL\n#define CGLTF_ATOLL(str) atoll(str)\n#endif\n#ifndef CGLTF_VALIDATE_ENABLE_ASSERTS\n#define CGLTF_VALIDATE_ENABLE_ASSERTS 0\n#endif\n\nstatic void* cgltf_default_alloc(void* user, cgltf_size size)\n{\n\t(void)user;\n\treturn CGLTF_MALLOC(size);\n}\n\nstatic void cgltf_default_free(void* user, void* ptr)\n{\n\t(void)user;\n\tCGLTF_FREE(ptr);\n}\n\nstatic void* cgltf_calloc(cgltf_options* options, size_t element_size, cgltf_size count)\n{\n\tif (SIZE_MAX / element_size < count)\n\t{\n\t\treturn NULL;\n\t}\n\tvoid* result = options->memory.alloc_func(options->memory.user_data, element_size * count);\n\tif (!result)\n\t{\n\t\treturn NULL;\n\t}\n\tmemset(result, 0, element_size * count);\n\treturn result;\n}\n\nstatic cgltf_result cgltf_default_file_read(const struct cgltf_memory_options* memory_options, const struct cgltf_file_options* file_options, const char* path, cgltf_size* size, void** data)\n{\n\t(void)file_options;\n\tvoid* (*memory_alloc)(void*, cgltf_size) = memory_options->alloc_func ? memory_options->alloc_func : &cgltf_default_alloc;\n\tvoid (*memory_free)(void*, void*) = memory_options->free_func ? memory_options->free_func : &cgltf_default_free;\n\n\tFILE* file = fopen(path, \"rb\");\n\tif (!file)\n\t{\n\t\treturn cgltf_result_file_not_found;\n\t}\n\n\tcgltf_size file_size = size ? *size : 0;\n\n\tif (file_size == 0)\n\t{\n\t\tfseek(file, 0, SEEK_END);\n\n#ifdef _MSC_VER\n\t\t__int64 length = _ftelli64(file);\n#else\n\t\tlong length = ftell(file);\n#endif\n\n\t\tif (length < 0)\n\t\t{\n\t\t\tfclose(file);\n\t\t\treturn cgltf_result_io_error;\n\t\t}\n\n\t\tfseek(file, 0, SEEK_SET);\n\t\tfile_size = (cgltf_size)length;\n\t}\n\n\tchar* file_data = (char*)memory_alloc(memory_options->user_data, file_size);\n\tif (!file_data)\n\t{\n\t\tfclose(file);\n\t\treturn cgltf_result_out_of_memory;\n\t}\n\n\tcgltf_size read_size = fread(file_data, 1, file_size, file);\n\n\tfclose(file);\n\n\tif (read_size != file_size)\n\t{\n\t\tmemory_free(memory_options->user_data, file_data);\n\t\treturn cgltf_result_io_error;\n\t}\n\n\tif (size)\n\t{\n\t\t*size = file_size;\n\t}\n\tif (data)\n\t{\n\t\t*data = file_data;\n\t}\n\n\treturn cgltf_result_success;\n}\n\nstatic void cgltf_default_file_release(const struct cgltf_memory_options* memory_options, const struct cgltf_file_options* file_options, void* data, cgltf_size size)\n{\n\t(void)file_options;\n\t(void)size;\n\tvoid (*memfree)(void*, void*) = memory_options->free_func ? memory_options->free_func : &cgltf_default_free;\n\tmemfree(memory_options->user_data, data);\n}\n\nstatic cgltf_result cgltf_parse_json(cgltf_options* options, const uint8_t* json_chunk, cgltf_size size, cgltf_data** out_data);\n\ncgltf_result cgltf_parse(const cgltf_options* options, const void* data, cgltf_size size, cgltf_data** out_data)\n{\n\tif (size < GlbHeaderSize)\n\t{\n\t\treturn cgltf_result_data_too_short;\n\t}\n\n\tif (options == NULL)\n\t{\n\t\treturn cgltf_result_invalid_options;\n\t}\n\n\tcgltf_options fixed_options = *options;\n\tif (fixed_options.memory.alloc_func == NULL)\n\t{\n\t\tfixed_options.memory.alloc_func = &cgltf_default_alloc;\n\t}\n\tif (fixed_options.memory.free_func == NULL)\n\t{\n\t\tfixed_options.memory.free_func = &cgltf_default_free;\n\t}\n\n\tuint32_t tmp;\n\t// Magic\n\tmemcpy(&tmp, data, 4);\n\tif (tmp != GlbMagic)\n\t{\n\t\tif (fixed_options.type == cgltf_file_type_invalid)\n\t\t{\n\t\t\tfixed_options.type = cgltf_file_type_gltf;\n\t\t}\n\t\telse if (fixed_options.type == cgltf_file_type_glb)\n\t\t{\n\t\t\treturn cgltf_result_unknown_format;\n\t\t}\n\t}\n\n\tif (fixed_options.type == cgltf_file_type_gltf)\n\t{\n\t\tcgltf_result json_result = cgltf_parse_json(&fixed_options, (const uint8_t*)data, size, out_data);\n\t\tif (json_result != cgltf_result_success)\n\t\t{\n\t\t\treturn json_result;\n\t\t}\n\n\t\t(*out_data)->file_type = cgltf_file_type_gltf;\n\n\t\treturn cgltf_result_success;\n\t}\n\n\tconst uint8_t* ptr = (const uint8_t*)data;\n\t// Version\n\tmemcpy(&tmp, ptr + 4, 4);\n\tuint32_t version = tmp;\n\tif (version != GlbVersion)\n\t{\n\t\treturn version < GlbVersion ? cgltf_result_legacy_gltf : cgltf_result_unknown_format;\n\t}\n\n\t// Total length\n\tmemcpy(&tmp, ptr + 8, 4);\n\tif (tmp > size)\n\t{\n\t\treturn cgltf_result_data_too_short;\n\t}\n\n\tconst uint8_t* json_chunk = ptr + GlbHeaderSize;\n\n\tif (GlbHeaderSize + GlbChunkHeaderSize > size)\n\t{\n\t\treturn cgltf_result_data_too_short;\n\t}\n\n\t// JSON chunk: length\n\tuint32_t json_length;\n\tmemcpy(&json_length, json_chunk, 4);\n\tif (json_length > size - GlbHeaderSize - GlbChunkHeaderSize)\n\t{\n\t\treturn cgltf_result_data_too_short;\n\t}\n\n\t// JSON chunk: magic\n\tmemcpy(&tmp, json_chunk + 4, 4);\n\tif (tmp != GlbMagicJsonChunk)\n\t{\n\t\treturn cgltf_result_unknown_format;\n\t}\n\n\tjson_chunk += GlbChunkHeaderSize;\n\n\tconst void* bin = NULL;\n\tcgltf_size bin_size = 0;\n\n\tif (GlbChunkHeaderSize <= size - GlbHeaderSize - GlbChunkHeaderSize - json_length)\n\t{\n\t\t// We can read another chunk\n\t\tconst uint8_t* bin_chunk = json_chunk + json_length;\n\n\t\t// Bin chunk: length\n\t\tuint32_t bin_length;\n\t\tmemcpy(&bin_length, bin_chunk, 4);\n\t\tif (bin_length > size - GlbHeaderSize - GlbChunkHeaderSize - json_length - GlbChunkHeaderSize)\n\t\t{\n\t\t\treturn cgltf_result_data_too_short;\n\t\t}\n\n\t\t// Bin chunk: magic\n\t\tmemcpy(&tmp, bin_chunk + 4, 4);\n\t\tif (tmp != GlbMagicBinChunk)\n\t\t{\n\t\t\treturn cgltf_result_unknown_format;\n\t\t}\n\n\t\tbin_chunk += GlbChunkHeaderSize;\n\n\t\tbin = bin_chunk;\n\t\tbin_size = bin_length;\n\t}\n\n\tcgltf_result json_result = cgltf_parse_json(&fixed_options, json_chunk, json_length, out_data);\n\tif (json_result != cgltf_result_success)\n\t{\n\t\treturn json_result;\n\t}\n\n\t(*out_data)->file_type = cgltf_file_type_glb;\n\t(*out_data)->bin = bin;\n\t(*out_data)->bin_size = bin_size;\n\n\treturn cgltf_result_success;\n}\n\ncgltf_result cgltf_parse_file(const cgltf_options* options, const char* path, cgltf_data** out_data)\n{\n\tif (options == NULL)\n\t{\n\t\treturn cgltf_result_invalid_options;\n\t}\n\n\tcgltf_result (*file_read)(const struct cgltf_memory_options*, const struct cgltf_file_options*, const char*, cgltf_size*, void**) = options->file.read ? options->file.read : &cgltf_default_file_read;\n\tvoid (*file_release)(const struct cgltf_memory_options*, const struct cgltf_file_options*, void* data, cgltf_size size) = options->file.release ? options->file.release : cgltf_default_file_release;\n\n\tvoid* file_data = NULL;\n\tcgltf_size file_size = 0;\n\tcgltf_result result = file_read(&options->memory, &options->file, path, &file_size, &file_data);\n\tif (result != cgltf_result_success)\n\t{\n\t\treturn result;\n\t}\n\n\tresult = cgltf_parse(options, file_data, file_size, out_data);\n\n\tif (result != cgltf_result_success)\n\t{\n\t\tfile_release(&options->memory, &options->file, file_data, file_size);\n\t\treturn result;\n\t}\n\n\t(*out_data)->file_data = file_data;\n\t(*out_data)->file_size = file_size;\n\n\treturn cgltf_result_success;\n}\n\nstatic void cgltf_combine_paths(char* path, const char* base, const char* uri)\n{\n\tconst char* s0 = strrchr(base, '/');\n\tconst char* s1 = strrchr(base, '\\\\');\n\tconst char* slash = s0 ? (s1 && s1 > s0 ? s1 : s0) : s1;\n\n\tif (slash)\n\t{\n\t\tsize_t prefix = slash - base + 1;\n\n\t\tstrncpy(path, base, prefix);\n\t\tstrcpy(path + prefix, uri);\n\t}\n\telse\n\t{\n\t\tstrcpy(path, uri);\n\t}\n}\n\nstatic cgltf_result cgltf_load_buffer_file(const cgltf_options* options, cgltf_size size, const char* uri, const char* gltf_path, void** out_data)\n{\n\tvoid* (*memory_alloc)(void*, cgltf_size) = options->memory.alloc_func ? options->memory.alloc_func : &cgltf_default_alloc;\n\tvoid (*memory_free)(void*, void*) = options->memory.free_func ? options->memory.free_func : &cgltf_default_free;\n\tcgltf_result (*file_read)(const struct cgltf_memory_options*, const struct cgltf_file_options*, const char*, cgltf_size*, void**) = options->file.read ? options->file.read : &cgltf_default_file_read;\n\n\tchar* path = (char*)memory_alloc(options->memory.user_data, strlen(uri) + strlen(gltf_path) + 1);\n\tif (!path)\n\t{\n\t\treturn cgltf_result_out_of_memory;\n\t}\n\n\tcgltf_combine_paths(path, gltf_path, uri);\n\n\t// after combining, the tail of the resulting path is a uri; decode_uri converts it into path\n\tcgltf_decode_uri(path + strlen(path) - strlen(uri));\n\n\tvoid* file_data = NULL;\n\tcgltf_result result = file_read(&options->memory, &options->file, path, &size, &file_data);\n\n\tmemory_free(options->memory.user_data, path);\n\n\t*out_data = (result == cgltf_result_success) ? file_data : NULL;\n\n\treturn result;\n}\n\ncgltf_result cgltf_load_buffer_base64(const cgltf_options* options, cgltf_size size, const char* base64, void** out_data)\n{\n\tvoid* (*memory_alloc)(void*, cgltf_size) = options->memory.alloc_func ? options->memory.alloc_func : &cgltf_default_alloc;\n\tvoid (*memory_free)(void*, void*) = options->memory.free_func ? options->memory.free_func : &cgltf_default_free;\n\n\tunsigned char* data = (unsigned char*)memory_alloc(options->memory.user_data, size);\n\tif (!data)\n\t{\n\t\treturn cgltf_result_out_of_memory;\n\t}\n\n\tunsigned int buffer = 0;\n\tunsigned int buffer_bits = 0;\n\n\tfor (cgltf_size i = 0; i < size; ++i)\n\t{\n\t\twhile (buffer_bits < 8)\n\t\t{\n\t\t\tchar ch = *base64++;\n\n\t\t\tint index =\n\t\t\t\t(unsigned)(ch - 'A') < 26 ? (ch - 'A') :\n\t\t\t\t(unsigned)(ch - 'a') < 26 ? (ch - 'a') + 26 :\n\t\t\t\t(unsigned)(ch - '0') < 10 ? (ch - '0') + 52 :\n\t\t\t\tch == '+' ? 62 :\n\t\t\t\tch == '/' ? 63 :\n\t\t\t\t-1;\n\n\t\t\tif (index < 0)\n\t\t\t{\n\t\t\t\tmemory_free(options->memory.user_data, data);\n\t\t\t\treturn cgltf_result_io_error;\n\t\t\t}\n\n\t\t\tbuffer = (buffer << 6) | index;\n\t\t\tbuffer_bits += 6;\n\t\t}\n\n\t\tdata[i] = (unsigned char)(buffer >> (buffer_bits - 8));\n\t\tbuffer_bits -= 8;\n\t}\n\n\t*out_data = data;\n\n\treturn cgltf_result_success;\n}\n\nstatic int cgltf_unhex(char ch)\n{\n\treturn\n\t\t(unsigned)(ch - '0') < 10 ? (ch - '0') :\n\t\t(unsigned)(ch - 'A') < 6 ? (ch - 'A') + 10 :\n\t\t(unsigned)(ch - 'a') < 6 ? (ch - 'a') + 10 :\n\t\t-1;\n}\n\ncgltf_size cgltf_decode_string(char* string)\n{\n\tchar* read = string + strcspn(string, \"\\\\\");\n\tif (*read == 0)\n\t{\n\t\treturn read - string;\n\t}\n\tchar* write = string;\n\tchar* last = string;\n\n\tfor (;;)\n\t{\n\t\t// Copy characters since last escaped sequence\n\t\tcgltf_size written = read - last;\n\t\tmemmove(write, last, written);\n\t\twrite += written;\n\n\t\tif (*read++ == 0)\n\t\t{\n\t\t\tbreak;\n\t\t}\n\n\t\t// jsmn already checked that all escape sequences are valid\n\t\tswitch (*read++)\n\t\t{\n\t\tcase '\\\"': *write++ = '\\\"'; break;\n\t\tcase '/': *write++ = '/'; break;\n\t\tcase '\\\\': *write++ = '\\\\'; break;\n\t\tcase 'b': *write++ = '\\b'; break;\n\t\tcase 'f': *write++ = '\\f'; break;\n\t\tcase 'r': *write++ = '\\r'; break;\n\t\tcase 'n': *write++ = '\\n'; break;\n\t\tcase 't': *write++ = '\\t'; break;\n\t\tcase 'u':\n\t\t{\n\t\t\t// UCS-2 codepoint \\uXXXX to UTF-8\n\t\t\tint character = 0;\n\t\t\tfor (cgltf_size i = 0; i < 4; ++i)\n\t\t\t{\n\t\t\t\tcharacter = (character << 4) + cgltf_unhex(*read++);\n\t\t\t}\n\n\t\t\tif (character <= 0x7F)\n\t\t\t{\n\t\t\t\t*write++ = character & 0xFF;\n\t\t\t}\n\t\t\telse if (character <= 0x7FF)\n\t\t\t{\n\t\t\t\t*write++ = 0xC0 | ((character >> 6) & 0xFF);\n\t\t\t\t*write++ = 0x80 | (character & 0x3F);\n\t\t\t}\n\t\t\telse\n\t\t\t{\n\t\t\t\t*write++ = 0xE0 | ((character >> 12) & 0xFF);\n\t\t\t\t*write++ = 0x80 | ((character >> 6) & 0x3F);\n\t\t\t\t*write++ = 0x80 | (character & 0x3F);\n\t\t\t}\n\t\t\tbreak;\n\t\t}\n\t\tdefault:\n\t\t\tbreak;\n\t\t}\n\n\t\tlast = read;\n\t\tread += strcspn(read, \"\\\\\");\n\t}\n\n\t*write = 0;\n\treturn write - string;\n}\n\ncgltf_size cgltf_decode_uri(char* uri)\n{\n\tchar* write = uri;\n\tchar* i = uri;\n\n\twhile (*i)\n\t{\n\t\tif (*i == '%')\n\t\t{\n\t\t\tint ch1 = cgltf_unhex(i[1]);\n\n\t\t\tif (ch1 >= 0)\n\t\t\t{\n\t\t\t\tint ch2 = cgltf_unhex(i[2]);\n\n\t\t\t\tif (ch2 >= 0)\n\t\t\t\t{\n\t\t\t\t\t*write++ = (char)(ch1 * 16 + ch2);\n\t\t\t\t\ti += 3;\n\t\t\t\t\tcontinue;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\t*write++ = *i++;\n\t}\n\n\t*write = 0;\n\treturn write - uri;\n}\n\ncgltf_result cgltf_load_buffers(const cgltf_options* options, cgltf_data* data, const char* gltf_path)\n{\n\tif (options == NULL)\n\t{\n\t\treturn cgltf_result_invalid_options;\n\t}\n\n\tif (data->buffers_count && data->buffers[0].data == NULL && data->buffers[0].uri == NULL && data->bin)\n\t{\n\t\tif (data->bin_size < data->buffers[0].size)\n\t\t{\n\t\t\treturn cgltf_result_data_too_short;\n\t\t}\n\n\t\tdata->buffers[0].data = (void*)data->bin;\n\t\tdata->buffers[0].data_free_method = cgltf_data_free_method_none;\n\t}\n\n\tfor (cgltf_size i = 0; i < data->buffers_count; ++i)\n\t{\n\t\tif (data->buffers[i].data)\n\t\t{\n\t\t\tcontinue;\n\t\t}\n\n\t\tconst char* uri = data->buffers[i].uri;\n\n\t\tif (uri == NULL)\n\t\t{\n\t\t\tcontinue;\n\t\t}\n\n\t\tif (strncmp(uri, \"data:\", 5) == 0)\n\t\t{\n\t\t\tconst char* comma = strchr(uri, ',');\n\n\t\t\tif (comma && comma - uri >= 7 && strncmp(comma - 7, \";base64\", 7) == 0)\n\t\t\t{\n\t\t\t\tcgltf_result res = cgltf_load_buffer_base64(options, data->buffers[i].size, comma + 1, &data->buffers[i].data);\n\t\t\t\tdata->buffers[i].data_free_method = cgltf_data_free_method_memory_free;\n\n\t\t\t\tif (res != cgltf_result_success)\n\t\t\t\t{\n\t\t\t\t\treturn res;\n\t\t\t\t}\n\t\t\t}\n\t\t\telse\n\t\t\t{\n\t\t\t\treturn cgltf_result_unknown_format;\n\t\t\t}\n\t\t}\n\t\telse if (strstr(uri, \"://\") == NULL && gltf_path)\n\t\t{\n\t\t\tcgltf_result res = cgltf_load_buffer_file(options, data->buffers[i].size, uri, gltf_path, &data->buffers[i].data);\n\t\t\tdata->buffers[i].data_free_method = cgltf_data_free_method_file_release;\n\n\t\t\tif (res != cgltf_result_success)\n\t\t\t{\n\t\t\t\treturn res;\n\t\t\t}\n\t\t}\n\t\telse\n\t\t{\n\t\t\treturn cgltf_result_unknown_format;\n\t\t}\n\t}\n\n\treturn cgltf_result_success;\n}\n\nstatic cgltf_size cgltf_calc_index_bound(cgltf_buffer_view* buffer_view, cgltf_size offset, cgltf_component_type component_type, cgltf_size count)\n{\n\tchar* data = (char*)buffer_view->buffer->data + offset + buffer_view->offset;\n\tcgltf_size bound = 0;\n\n\tswitch (component_type)\n\t{\n\tcase cgltf_component_type_r_8u:\n\t\tfor (size_t i = 0; i < count; ++i)\n\t\t{\n\t\t\tcgltf_size v = ((unsigned char*)data)[i];\n\t\t\tbound = bound > v ? bound : v;\n\t\t}\n\t\tbreak;\n\n\tcase cgltf_component_type_r_16u:\n\t\tfor (size_t i = 0; i < count; ++i)\n\t\t{\n\t\t\tcgltf_size v = ((unsigned short*)data)[i];\n\t\t\tbound = bound > v ? bound : v;\n\t\t}\n\t\tbreak;\n\n\tcase cgltf_component_type_r_32u:\n\t\tfor (size_t i = 0; i < count; ++i)\n\t\t{\n\t\t\tcgltf_size v = ((unsigned int*)data)[i];\n\t\t\tbound = bound > v ? bound : v;\n\t\t}\n\t\tbreak;\n\n\tdefault:\n\t\t;\n\t}\n\n\treturn bound;\n}\n\n#if CGLTF_VALIDATE_ENABLE_ASSERTS\n#define CGLTF_ASSERT_IF(cond, result) assert(!(cond)); if (cond) return result;\n#else\n#define CGLTF_ASSERT_IF(cond, result) if (cond) return result;\n#endif\n\ncgltf_result cgltf_validate(cgltf_data* data)\n{\n\tfor (cgltf_size i = 0; i < data->accessors_count; ++i)\n\t{\n\t\tcgltf_accessor* accessor = &data->accessors[i];\n\n\t\tCGLTF_ASSERT_IF(data->accessors[i].component_type == cgltf_component_type_invalid, cgltf_result_invalid_gltf);\n\t\tCGLTF_ASSERT_IF(data->accessors[i].type == cgltf_type_invalid, cgltf_result_invalid_gltf);\n\n\t\tcgltf_size element_size = cgltf_calc_size(accessor->type, accessor->component_type);\n\n\t\tif (accessor->buffer_view)\n\t\t{\n\t\t\tcgltf_size req_size = accessor->offset + accessor->stride * (accessor->count - 1) + element_size;\n\n\t\t\tCGLTF_ASSERT_IF(accessor->buffer_view->size < req_size, cgltf_result_data_too_short);\n\t\t}\n\n\t\tif (accessor->is_sparse)\n\t\t{\n\t\t\tcgltf_accessor_sparse* sparse = &accessor->sparse;\n\n\t\t\tcgltf_size indices_component_size = cgltf_component_size(sparse->indices_component_type);\n\t\t\tcgltf_size indices_req_size = sparse->indices_byte_offset + indices_component_size * sparse->count;\n\t\t\tcgltf_size values_req_size = sparse->values_byte_offset + element_size * sparse->count;\n\n\t\t\tCGLTF_ASSERT_IF(sparse->indices_buffer_view->size < indices_req_size ||\n\t\t\t\t\t\t\tsparse->values_buffer_view->size < values_req_size, cgltf_result_data_too_short);\n\n\t\t\tCGLTF_ASSERT_IF(sparse->indices_component_type != cgltf_component_type_r_8u &&\n\t\t\t\t\t\t\tsparse->indices_component_type != cgltf_component_type_r_16u &&\n\t\t\t\t\t\t\tsparse->indices_component_type != cgltf_component_type_r_32u, cgltf_result_invalid_gltf);\n\n\t\t\tif (sparse->indices_buffer_view->buffer->data)\n\t\t\t{\n\t\t\t\tcgltf_size index_bound = cgltf_calc_index_bound(sparse->indices_buffer_view, sparse->indices_byte_offset, sparse->indices_component_type, sparse->count);\n\n\t\t\t\tCGLTF_ASSERT_IF(index_bound >= accessor->count, cgltf_result_data_too_short);\n\t\t\t}\n\t\t}\n\t}\n\n\tfor (cgltf_size i = 0; i < data->buffer_views_count; ++i)\n\t{\n\t\tcgltf_size req_size = data->buffer_views[i].offset + data->buffer_views[i].size;\n\n\t\tCGLTF_ASSERT_IF(data->buffer_views[i].buffer && data->buffer_views[i].buffer->size < req_size, cgltf_result_data_too_short);\n\n\t\tif (data->buffer_views[i].has_meshopt_compression)\n\t\t{\n\t\t\tcgltf_meshopt_compression* mc = &data->buffer_views[i].meshopt_compression;\n\n\t\t\tCGLTF_ASSERT_IF(mc->buffer == NULL || mc->buffer->size < mc->offset + mc->size, cgltf_result_data_too_short);\n\n\t\t\tCGLTF_ASSERT_IF(data->buffer_views[i].stride && mc->stride != data->buffer_views[i].stride, cgltf_result_invalid_gltf);\n\n\t\t\tCGLTF_ASSERT_IF(data->buffer_views[i].size != mc->stride * mc->count, cgltf_result_invalid_gltf);\n\n\t\t\tCGLTF_ASSERT_IF(mc->mode == cgltf_meshopt_compression_mode_invalid, cgltf_result_invalid_gltf);\n\n\t\t\tCGLTF_ASSERT_IF(mc->mode == cgltf_meshopt_compression_mode_attributes && !(mc->stride % 4 == 0 && mc->stride <= 256), cgltf_result_invalid_gltf);\n\n\t\t\tCGLTF_ASSERT_IF(mc->mode == cgltf_meshopt_compression_mode_triangles && mc->count % 3 != 0, cgltf_result_invalid_gltf);\n\n\t\t\tCGLTF_ASSERT_IF((mc->mode == cgltf_meshopt_compression_mode_triangles || mc->mode == cgltf_meshopt_compression_mode_indices) && mc->stride != 2 && mc->stride != 4, cgltf_result_invalid_gltf);\n\n\t\t\tCGLTF_ASSERT_IF((mc->mode == cgltf_meshopt_compression_mode_triangles || mc->mode == cgltf_meshopt_compression_mode_indices) && mc->filter != cgltf_meshopt_compression_filter_none, cgltf_result_invalid_gltf);\n\n\t\t\tCGLTF_ASSERT_IF(mc->filter == cgltf_meshopt_compression_filter_octahedral && mc->stride != 4 && mc->stride != 8, cgltf_result_invalid_gltf);\n\t\t\tCGLTF_ASSERT_IF(mc->filter == cgltf_meshopt_compression_filter_quaternion && mc->stride != 8, cgltf_result_invalid_gltf);\n\t\t\tCGLTF_ASSERT_IF(mc->filter == cgltf_meshopt_compression_filter_color && mc->stride != 4 && mc->stride != 8, cgltf_result_invalid_gltf);\n\t\t}\n\t}\n\n\tfor (cgltf_size i = 0; i < data->meshes_count; ++i)\n\t{\n\t\tif (data->meshes[i].weights)\n\t\t{\n\t\t\tCGLTF_ASSERT_IF(data->meshes[i].primitives_count && data->meshes[i].primitives[0].targets_count != data->meshes[i].weights_count, cgltf_result_invalid_gltf);\n\t\t}\n\n\t\tif (data->meshes[i].target_names)\n\t\t{\n\t\t\tCGLTF_ASSERT_IF(data->meshes[i].primitives_count && data->meshes[i].primitives[0].targets_count != data->meshes[i].target_names_count, cgltf_result_invalid_gltf);\n\t\t}\n\n\t\tfor (cgltf_size j = 0; j < data->meshes[i].primitives_count; ++j)\n\t\t{\n\t\t\tCGLTF_ASSERT_IF(data->meshes[i].primitives[j].type == cgltf_primitive_type_invalid, cgltf_result_invalid_gltf);\n\t\t\tCGLTF_ASSERT_IF(data->meshes[i].primitives[j].targets_count != data->meshes[i].primitives[0].targets_count, cgltf_result_invalid_gltf);\n\n\t\t\tCGLTF_ASSERT_IF(data->meshes[i].primitives[j].attributes_count == 0, cgltf_result_invalid_gltf);\n\n\t\t\tcgltf_accessor* first = data->meshes[i].primitives[j].attributes[0].data;\n\n\t\t\tCGLTF_ASSERT_IF(first->count == 0, cgltf_result_invalid_gltf);\n\n\t\t\tfor (cgltf_size k = 0; k < data->meshes[i].primitives[j].attributes_count; ++k)\n\t\t\t{\n\t\t\t\tCGLTF_ASSERT_IF(data->meshes[i].primitives[j].attributes[k].data->count != first->count, cgltf_result_invalid_gltf);\n\t\t\t}\n\n\t\t\tfor (cgltf_size k = 0; k < data->meshes[i].primitives[j].targets_count; ++k)\n\t\t\t{\n\t\t\t\tfor (cgltf_size m = 0; m < data->meshes[i].primitives[j].targets[k].attributes_count; ++m)\n\t\t\t\t{\n\t\t\t\t\tCGLTF_ASSERT_IF(data->meshes[i].primitives[j].targets[k].attributes[m].data->count != first->count, cgltf_result_invalid_gltf);\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tcgltf_accessor* indices = data->meshes[i].primitives[j].indices;\n\n\t\t\tCGLTF_ASSERT_IF(indices &&\n\t\t\t\tindices->component_type != cgltf_component_type_r_8u &&\n\t\t\t\tindices->component_type != cgltf_component_type_r_16u &&\n\t\t\t\tindices->component_type != cgltf_component_type_r_32u, cgltf_result_invalid_gltf);\n\n\t\t\tCGLTF_ASSERT_IF(indices && indices->type != cgltf_type_scalar, cgltf_result_invalid_gltf);\n\t\t\tCGLTF_ASSERT_IF(indices && indices->stride != cgltf_component_size(indices->component_type), cgltf_result_invalid_gltf);\n\n\t\t\tif (indices && indices->buffer_view && indices->buffer_view->buffer->data)\n\t\t\t{\n\t\t\t\tcgltf_size index_bound = cgltf_calc_index_bound(indices->buffer_view, indices->offset, indices->component_type, indices->count);\n\n\t\t\t\tCGLTF_ASSERT_IF(index_bound >= first->count, cgltf_result_data_too_short);\n\t\t\t}\n\n\t\t\tfor (cgltf_size k = 0; k < data->meshes[i].primitives[j].mappings_count; ++k)\n\t\t\t{\n\t\t\t\tCGLTF_ASSERT_IF(data->meshes[i].primitives[j].mappings[k].variant >= data->variants_count, cgltf_result_invalid_gltf);\n\t\t\t}\n\t\t}\n\t}\n\n\tfor (cgltf_size i = 0; i < data->nodes_count; ++i)\n\t{\n\t\tif (data->nodes[i].weights && data->nodes[i].mesh)\n\t\t{\n\t\t\tCGLTF_ASSERT_IF(data->nodes[i].mesh->primitives_count && data->nodes[i].mesh->primitives[0].targets_count != data->nodes[i].weights_count, cgltf_result_invalid_gltf);\n\t\t}\n\n\t\tif (data->nodes[i].has_mesh_gpu_instancing)\n\t\t{\n\t\t\tCGLTF_ASSERT_IF(data->nodes[i].mesh == NULL, cgltf_result_invalid_gltf);\n\t\t\tCGLTF_ASSERT_IF(data->nodes[i].mesh_gpu_instancing.attributes_count == 0, cgltf_result_invalid_gltf);\n\n\t\t\tcgltf_accessor* first = data->nodes[i].mesh_gpu_instancing.attributes[0].data;\n\n\t\t\tfor (cgltf_size k = 0; k < data->nodes[i].mesh_gpu_instancing.attributes_count; ++k)\n\t\t\t{\n\t\t\t\tCGLTF_ASSERT_IF(data->nodes[i].mesh_gpu_instancing.attributes[k].data->count != first->count, cgltf_result_invalid_gltf);\n\t\t\t}\n\t\t}\n\t}\n\n\tfor (cgltf_size i = 0; i < data->nodes_count; ++i)\n\t{\n\t\tcgltf_node* p1 = data->nodes[i].parent;\n\t\tcgltf_node* p2 = p1 ? p1->parent : NULL;\n\n\t\twhile (p1 && p2)\n\t\t{\n\t\t\tCGLTF_ASSERT_IF(p1 == p2, cgltf_result_invalid_gltf);\n\n\t\t\tp1 = p1->parent;\n\t\t\tp2 = p2->parent ? p2->parent->parent : NULL;\n\t\t}\n\t}\n\n\tfor (cgltf_size i = 0; i < data->scenes_count; ++i)\n\t{\n\t\tfor (cgltf_size j = 0; j < data->scenes[i].nodes_count; ++j)\n\t\t{\n\t\t\tCGLTF_ASSERT_IF(data->scenes[i].nodes[j]->parent, cgltf_result_invalid_gltf);\n\t\t}\n\t}\n\n\tfor (cgltf_size i = 0; i < data->animations_count; ++i)\n\t{\n\t\tfor (cgltf_size j = 0; j < data->animations[i].channels_count; ++j)\n\t\t{\n\t\t\tcgltf_animation_channel* channel = &data->animations[i].channels[j];\n\n\t\t\tif (!channel->target_node)\n\t\t\t{\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\tcgltf_size components = 1;\n\n\t\t\tif (channel->target_path == cgltf_animation_path_type_weights)\n\t\t\t{\n\t\t\t\tCGLTF_ASSERT_IF(!channel->target_node->mesh || !channel->target_node->mesh->primitives_count, cgltf_result_invalid_gltf);\n\n\t\t\t\tcomponents = channel->target_node->mesh->primitives[0].targets_count;\n\t\t\t}\n\n\t\t\tcgltf_size values = channel->sampler->interpolation == cgltf_interpolation_type_cubic_spline ? 3 : 1;\n\n\t\t\tCGLTF_ASSERT_IF(channel->sampler->input->count * components * values != channel->sampler->output->count, cgltf_result_invalid_gltf);\n\t\t}\n\t}\n\n\tfor (cgltf_size i = 0; i < data->variants_count; ++i)\n\t{\n\t\tCGLTF_ASSERT_IF(!data->variants[i].name, cgltf_result_invalid_gltf);\n\t}\n\n\treturn cgltf_result_success;\n}\n\ncgltf_result cgltf_copy_extras_json(const cgltf_data* data, const cgltf_extras* extras, char* dest, cgltf_size* dest_size)\n{\n\tcgltf_size json_size = extras->end_offset - extras->start_offset;\n\n\tif (!dest)\n\t{\n\t\tif (dest_size)\n\t\t{\n\t\t\t*dest_size = json_size + 1;\n\t\t\treturn cgltf_result_success;\n\t\t}\n\t\treturn cgltf_result_invalid_options;\n\t}\n\n\tif (*dest_size + 1 < json_size)\n\t{\n\t\tstrncpy(dest, data->json + extras->start_offset, *dest_size - 1);\n\t\tdest[*dest_size - 1] = 0;\n\t}\n\telse\n\t{\n\t\tstrncpy(dest, data->json + extras->start_offset, json_size);\n\t\tdest[json_size] = 0;\n\t}\n\n\treturn cgltf_result_success;\n}\n\nstatic void cgltf_free_extras(cgltf_data* data, cgltf_extras* extras)\n{\n\tdata->memory.free_func(data->memory.user_data, extras->data);\n}\n\nstatic void cgltf_free_extensions(cgltf_data* data, cgltf_extension* extensions, cgltf_size extensions_count)\n{\n\tfor (cgltf_size i = 0; i < extensions_count; ++i)\n\t{\n\t\tdata->memory.free_func(data->memory.user_data, extensions[i].name);\n\t\tdata->memory.free_func(data->memory.user_data, extensions[i].data);\n\t}\n\tdata->memory.free_func(data->memory.user_data, extensions);\n}\n\nvoid cgltf_free(cgltf_data* data)\n{\n\tif (!data)\n\t{\n\t\treturn;\n\t}\n\n\tvoid (*file_release)(const struct cgltf_memory_options*, const struct cgltf_file_options*, void* data, cgltf_size size) = data->file.release ? data->file.release : cgltf_default_file_release;\n\n\tdata->memory.free_func(data->memory.user_data, data->asset.copyright);\n\tdata->memory.free_func(data->memory.user_data, data->asset.generator);\n\tdata->memory.free_func(data->memory.user_data, data->asset.version);\n\tdata->memory.free_func(data->memory.user_data, data->asset.min_version);\n\n\tcgltf_free_extensions(data, data->asset.extensions, data->asset.extensions_count);\n\tcgltf_free_extras(data, &data->asset.extras);\n\n\tfor (cgltf_size i = 0; i < data->accessors_count; ++i)\n\t{\n\t\tdata->memory.free_func(data->memory.user_data, data->accessors[i].name);\n\n\t\tcgltf_free_extensions(data, data->accessors[i].extensions, data->accessors[i].extensions_count);\n\t\tcgltf_free_extras(data, &data->accessors[i].extras);\n\t}\n\tdata->memory.free_func(data->memory.user_data, data->accessors);\n\n\tfor (cgltf_size i = 0; i < data->buffer_views_count; ++i)\n\t{\n\t\tdata->memory.free_func(data->memory.user_data, data->buffer_views[i].name);\n\t\tdata->memory.free_func(data->memory.user_data, data->buffer_views[i].data);\n\n\t\tcgltf_free_extensions(data, data->buffer_views[i].extensions, data->buffer_views[i].extensions_count);\n\t\tcgltf_free_extras(data, &data->buffer_views[i].extras);\n\t}\n\tdata->memory.free_func(data->memory.user_data, data->buffer_views);\n\n\tfor (cgltf_size i = 0; i < data->buffers_count; ++i)\n\t{\n\t\tdata->memory.free_func(data->memory.user_data, data->buffers[i].name);\n\n\t\tif (data->buffers[i].data_free_method == cgltf_data_free_method_file_release)\n\t\t{\n\t\t\tfile_release(&data->memory, &data->file, data->buffers[i].data, data->buffers[i].size);\n\t\t}\n\t\telse if (data->buffers[i].data_free_method == cgltf_data_free_method_memory_free)\n\t\t{\n\t\t\tdata->memory.free_func(data->memory.user_data, data->buffers[i].data);\n\t\t}\n\n\t\tdata->memory.free_func(data->memory.user_data, data->buffers[i].uri);\n\n\t\tcgltf_free_extensions(data, data->buffers[i].extensions, data->buffers[i].extensions_count);\n\t\tcgltf_free_extras(data, &data->buffers[i].extras);\n\t}\n\tdata->memory.free_func(data->memory.user_data, data->buffers);\n\n\tfor (cgltf_size i = 0; i < data->meshes_count; ++i)\n\t{\n\t\tdata->memory.free_func(data->memory.user_data, data->meshes[i].name);\n\n\t\tfor (cgltf_size j = 0; j < data->meshes[i].primitives_count; ++j)\n\t\t{\n\t\t\tfor (cgltf_size k = 0; k < data->meshes[i].primitives[j].attributes_count; ++k)\n\t\t\t{\n\t\t\t\tdata->memory.free_func(data->memory.user_data, data->meshes[i].primitives[j].attributes[k].name);\n\t\t\t}\n\n\t\t\tdata->memory.free_func(data->memory.user_data, data->meshes[i].primitives[j].attributes);\n\n\t\t\tfor (cgltf_size k = 0; k < data->meshes[i].primitives[j].targets_count; ++k)\n\t\t\t{\n\t\t\t\tfor (cgltf_size m = 0; m < data->meshes[i].primitives[j].targets[k].attributes_count; ++m)\n\t\t\t\t{\n\t\t\t\t\tdata->memory.free_func(data->memory.user_data, data->meshes[i].primitives[j].targets[k].attributes[m].name);\n\t\t\t\t}\n\n\t\t\t\tdata->memory.free_func(data->memory.user_data, data->meshes[i].primitives[j].targets[k].attributes);\n\t\t\t}\n\n\t\t\tdata->memory.free_func(data->memory.user_data, data->meshes[i].primitives[j].targets);\n\n\t\t\tif (data->meshes[i].primitives[j].has_draco_mesh_compression)\n\t\t\t{\n\t\t\t\tfor (cgltf_size k = 0; k < data->meshes[i].primitives[j].draco_mesh_compression.attributes_count; ++k)\n\t\t\t\t{\n\t\t\t\t\tdata->memory.free_func(data->memory.user_data, data->meshes[i].primitives[j].draco_mesh_compression.attributes[k].name);\n\t\t\t\t}\n\n\t\t\t\tdata->memory.free_func(data->memory.user_data, data->meshes[i].primitives[j].draco_mesh_compression.attributes);\n\t\t\t}\n\n\t\t\tfor (cgltf_size k = 0; k < data->meshes[i].primitives[j].mappings_count; ++k)\n\t\t\t{\n\t\t\t\tcgltf_free_extras(data, &data->meshes[i].primitives[j].mappings[k].extras);\n\t\t\t}\n\n\t\t\tdata->memory.free_func(data->memory.user_data, data->meshes[i].primitives[j].mappings);\n\n\t\t\tcgltf_free_extensions(data, data->meshes[i].primitives[j].extensions, data->meshes[i].primitives[j].extensions_count);\n\t\t\tcgltf_free_extras(data, &data->meshes[i].primitives[j].extras);\n\t\t}\n\n\t\tdata->memory.free_func(data->memory.user_data, data->meshes[i].primitives);\n\t\tdata->memory.free_func(data->memory.user_data, data->meshes[i].weights);\n\n\t\tfor (cgltf_size j = 0; j < data->meshes[i].target_names_count; ++j)\n\t\t{\n\t\t\tdata->memory.free_func(data->memory.user_data, data->meshes[i].target_names[j]);\n\t\t}\n\n\t\tcgltf_free_extensions(data, data->meshes[i].extensions, data->meshes[i].extensions_count);\n\t\tcgltf_free_extras(data, &data->meshes[i].extras);\n\n\t\tdata->memory.free_func(data->memory.user_data, data->meshes[i].target_names);\n\t}\n\n\tdata->memory.free_func(data->memory.user_data, data->meshes);\n\n\tfor (cgltf_size i = 0; i < data->materials_count; ++i)\n\t{\n\t\tdata->memory.free_func(data->memory.user_data, data->materials[i].name);\n\n\t\tcgltf_free_extensions(data, data->materials[i].extensions, data->materials[i].extensions_count);\n\t\tcgltf_free_extras(data, &data->materials[i].extras);\n\t}\n\n\tdata->memory.free_func(data->memory.user_data, data->materials);\n\n\tfor (cgltf_size i = 0; i < data->images_count; ++i)\n\t{\n\t\tdata->memory.free_func(data->memory.user_data, data->images[i].name);\n\t\tdata->memory.free_func(data->memory.user_data, data->images[i].uri);\n\t\tdata->memory.free_func(data->memory.user_data, data->images[i].mime_type);\n\n\t\tcgltf_free_extensions(data, data->images[i].extensions, data->images[i].extensions_count);\n\t\tcgltf_free_extras(data, &data->images[i].extras);\n\t}\n\n\tdata->memory.free_func(data->memory.user_data, data->images);\n\n\tfor (cgltf_size i = 0; i < data->textures_count; ++i)\n\t{\n\t\tdata->memory.free_func(data->memory.user_data, data->textures[i].name);\n\n\t\tcgltf_free_extensions(data, data->textures[i].extensions, data->textures[i].extensions_count);\n\t\tcgltf_free_extras(data, &data->textures[i].extras);\n\t}\n\n\tdata->memory.free_func(data->memory.user_data, data->textures);\n\n\tfor (cgltf_size i = 0; i < data->samplers_count; ++i)\n\t{\n\t\tdata->memory.free_func(data->memory.user_data, data->samplers[i].name);\n\n\t\tcgltf_free_extensions(data, data->samplers[i].extensions, data->samplers[i].extensions_count);\n\t\tcgltf_free_extras(data, &data->samplers[i].extras);\n\t}\n\n\tdata->memory.free_func(data->memory.user_data, data->samplers);\n\n\tfor (cgltf_size i = 0; i < data->skins_count; ++i)\n\t{\n\t\tdata->memory.free_func(data->memory.user_data, data->skins[i].name);\n\t\tdata->memory.free_func(data->memory.user_data, data->skins[i].joints);\n\n\t\tcgltf_free_extensions(data, data->skins[i].extensions, data->skins[i].extensions_count);\n\t\tcgltf_free_extras(data, &data->skins[i].extras);\n\t}\n\n\tdata->memory.free_func(data->memory.user_data, data->skins);\n\n\tfor (cgltf_size i = 0; i < data->cameras_count; ++i)\n\t{\n\t\tdata->memory.free_func(data->memory.user_data, data->cameras[i].name);\n\n\t\tif (data->cameras[i].type == cgltf_camera_type_perspective)\n\t\t{\n\t\t\tcgltf_free_extras(data, &data->cameras[i].data.perspective.extras);\n\t\t}\n\t\telse if (data->cameras[i].type == cgltf_camera_type_orthographic)\n\t\t{\n\t\t\tcgltf_free_extras(data, &data->cameras[i].data.orthographic.extras);\n\t\t}\n\n\t\tcgltf_free_extensions(data, data->cameras[i].extensions, data->cameras[i].extensions_count);\n\t\tcgltf_free_extras(data, &data->cameras[i].extras);\n\t}\n\n\tdata->memory.free_func(data->memory.user_data, data->cameras);\n\n\tfor (cgltf_size i = 0; i < data->lights_count; ++i)\n\t{\n\t\tdata->memory.free_func(data->memory.user_data, data->lights[i].name);\n\n\t\tcgltf_free_extras(data, &data->lights[i].extras);\n\t}\n\n\tdata->memory.free_func(data->memory.user_data, data->lights);\n\n\tfor (cgltf_size i = 0; i < data->nodes_count; ++i)\n\t{\n\t\tdata->memory.free_func(data->memory.user_data, data->nodes[i].name);\n\t\tdata->memory.free_func(data->memory.user_data, data->nodes[i].children);\n\t\tdata->memory.free_func(data->memory.user_data, data->nodes[i].weights);\n\n\t\tif (data->nodes[i].has_mesh_gpu_instancing)\n\t\t{\n\t\t\tfor (cgltf_size j = 0; j < data->nodes[i].mesh_gpu_instancing.attributes_count; ++j)\n\t\t\t{\n\t\t\t\tdata->memory.free_func(data->memory.user_data, data->nodes[i].mesh_gpu_instancing.attributes[j].name);\n\t\t\t}\n\n\t\t\tdata->memory.free_func(data->memory.user_data, data->nodes[i].mesh_gpu_instancing.attributes);\n\t\t}\n\n\t\tcgltf_free_extensions(data, data->nodes[i].extensions, data->nodes[i].extensions_count);\n\t\tcgltf_free_extras(data, &data->nodes[i].extras);\n\t}\n\n\tdata->memory.free_func(data->memory.user_data, data->nodes);\n\n\tfor (cgltf_size i = 0; i < data->scenes_count; ++i)\n\t{\n\t\tdata->memory.free_func(data->memory.user_data, data->scenes[i].name);\n\t\tdata->memory.free_func(data->memory.user_data, data->scenes[i].nodes);\n\n\t\tcgltf_free_extensions(data, data->scenes[i].extensions, data->scenes[i].extensions_count);\n\t\tcgltf_free_extras(data, &data->scenes[i].extras);\n\t}\n\n\tdata->memory.free_func(data->memory.user_data, data->scenes);\n\n\tfor (cgltf_size i = 0; i < data->animations_count; ++i)\n\t{\n\t\tdata->memory.free_func(data->memory.user_data, data->animations[i].name);\n\t\tfor (cgltf_size j = 0; j < data->animations[i].samplers_count; ++j)\n\t\t{\n\t\t\tcgltf_free_extensions(data, data->animations[i].samplers[j].extensions, data->animations[i].samplers[j].extensions_count);\n\t\t\tcgltf_free_extras(data, &data->animations[i].samplers[j].extras);\n\t\t}\n\t\tdata->memory.free_func(data->memory.user_data, data->animations[i].samplers);\n\n\t\tfor (cgltf_size j = 0; j < data->animations[i].channels_count; ++j)\n\t\t{\n\t\t\tcgltf_free_extensions(data, data->animations[i].channels[j].extensions, data->animations[i].channels[j].extensions_count);\n\t\t\tcgltf_free_extras(data, &data->animations[i].channels[j].extras);\n\t\t}\n\t\tdata->memory.free_func(data->memory.user_data, data->animations[i].channels);\n\n\t\tcgltf_free_extensions(data, data->animations[i].extensions, data->animations[i].extensions_count);\n\t\tcgltf_free_extras(data, &data->animations[i].extras);\n\t}\n\n\tdata->memory.free_func(data->memory.user_data, data->animations);\n\n\tfor (cgltf_size i = 0; i < data->variants_count; ++i)\n\t{\n\t\tdata->memory.free_func(data->memory.user_data, data->variants[i].name);\n\n\t\tcgltf_free_extras(data, &data->variants[i].extras);\n\t}\n\n\tdata->memory.free_func(data->memory.user_data, data->variants);\n\n\tcgltf_free_extensions(data, data->data_extensions, data->data_extensions_count);\n\tcgltf_free_extras(data, &data->extras);\n\n\tfor (cgltf_size i = 0; i < data->extensions_used_count; ++i)\n\t{\n\t\tdata->memory.free_func(data->memory.user_data, data->extensions_used[i]);\n\t}\n\n\tdata->memory.free_func(data->memory.user_data, data->extensions_used);\n\n\tfor (cgltf_size i = 0; i < data->extensions_required_count; ++i)\n\t{\n\t\tdata->memory.free_func(data->memory.user_data, data->extensions_required[i]);\n\t}\n\n\tdata->memory.free_func(data->memory.user_data, data->extensions_required);\n\n\tfile_release(&data->memory, &data->file, data->file_data, data->file_size);\n\n\tdata->memory.free_func(data->memory.user_data, data);\n}\n\nvoid cgltf_node_transform_local(const cgltf_node* node, cgltf_float* out_matrix)\n{\n\tcgltf_float* lm = out_matrix;\n\n\tif (node->has_matrix)\n\t{\n\t\tmemcpy(lm, node->matrix, sizeof(float) * 16);\n\t}\n\telse\n\t{\n\t\tfloat tx = node->translation[0];\n\t\tfloat ty = node->translation[1];\n\t\tfloat tz = node->translation[2];\n\n\t\tfloat qx = node->rotation[0];\n\t\tfloat qy = node->rotation[1];\n\t\tfloat qz = node->rotation[2];\n\t\tfloat qw = node->rotation[3];\n\n\t\tfloat sx = node->scale[0];\n\t\tfloat sy = node->scale[1];\n\t\tfloat sz = node->scale[2];\n\n\t\tlm[0] = (1 - 2 * qy*qy - 2 * qz*qz) * sx;\n\t\tlm[1] = (2 * qx*qy + 2 * qz*qw) * sx;\n\t\tlm[2] = (2 * qx*qz - 2 * qy*qw) * sx;\n\t\tlm[3] = 0.f;\n\n\t\tlm[4] = (2 * qx*qy - 2 * qz*qw) * sy;\n\t\tlm[5] = (1 - 2 * qx*qx - 2 * qz*qz) * sy;\n\t\tlm[6] = (2 * qy*qz + 2 * qx*qw) * sy;\n\t\tlm[7] = 0.f;\n\n\t\tlm[8] = (2 * qx*qz + 2 * qy*qw) * sz;\n\t\tlm[9] = (2 * qy*qz - 2 * qx*qw) * sz;\n\t\tlm[10] = (1 - 2 * qx*qx - 2 * qy*qy) * sz;\n\t\tlm[11] = 0.f;\n\n\t\tlm[12] = tx;\n\t\tlm[13] = ty;\n\t\tlm[14] = tz;\n\t\tlm[15] = 1.f;\n\t}\n}\n\nvoid cgltf_node_transform_world(const cgltf_node* node, cgltf_float* out_matrix)\n{\n\tcgltf_float* lm = out_matrix;\n\tcgltf_node_transform_local(node, lm);\n\n\tconst cgltf_node* parent = node->parent;\n\n\twhile (parent)\n\t{\n\t\tfloat pm[16];\n\t\tcgltf_node_transform_local(parent, pm);\n\n\t\tfor (int i = 0; i < 4; ++i)\n\t\t{\n\t\t\tfloat l0 = lm[i * 4 + 0];\n\t\t\tfloat l1 = lm[i * 4 + 1];\n\t\t\tfloat l2 = lm[i * 4 + 2];\n\n\t\t\tfloat r0 = l0 * pm[0] + l1 * pm[4] + l2 * pm[8];\n\t\t\tfloat r1 = l0 * pm[1] + l1 * pm[5] + l2 * pm[9];\n\t\t\tfloat r2 = l0 * pm[2] + l1 * pm[6] + l2 * pm[10];\n\n\t\t\tlm[i * 4 + 0] = r0;\n\t\t\tlm[i * 4 + 1] = r1;\n\t\t\tlm[i * 4 + 2] = r2;\n\t\t}\n\n\t\tlm[12] += pm[12];\n\t\tlm[13] += pm[13];\n\t\tlm[14] += pm[14];\n\n\t\tparent = parent->parent;\n\t}\n}\n\nstatic cgltf_ssize cgltf_component_read_integer(const void* in, cgltf_component_type component_type)\n{\n\tswitch (component_type)\n\t{\n\t\tcase cgltf_component_type_r_16:\n\t\t\treturn *((const int16_t*) in);\n\t\tcase cgltf_component_type_r_16u:\n\t\t\treturn *((const uint16_t*) in);\n\t\tcase cgltf_component_type_r_32u:\n\t\t\treturn *((const uint32_t*) in);\n\t\tcase cgltf_component_type_r_8:\n\t\t\treturn *((const int8_t*) in);\n\t\tcase cgltf_component_type_r_8u:\n\t\t\treturn *((const uint8_t*) in);\n\t\tdefault:\n\t\t\treturn 0;\n\t}\n}\n\nstatic cgltf_size cgltf_component_read_index(const void* in, cgltf_component_type component_type)\n{\n\tswitch (component_type)\n\t{\n\t\tcase cgltf_component_type_r_16u:\n\t\t\treturn *((const uint16_t*) in);\n\t\tcase cgltf_component_type_r_32u:\n\t\t\treturn *((const uint32_t*) in);\n\t\tcase cgltf_component_type_r_8u:\n\t\t\treturn *((const uint8_t*) in);\n\t\tdefault:\n\t\t\treturn 0;\n\t}\n}\n\nstatic cgltf_float cgltf_component_read_float(const void* in, cgltf_component_type component_type, cgltf_bool normalized)\n{\n\tif (component_type == cgltf_component_type_r_32f)\n\t{\n\t\treturn *((const float*) in);\n\t}\n\n\tif (normalized)\n\t{\n\t\tswitch (component_type)\n\t\t{\n\t\t\t// note: glTF spec doesn't currently define normalized conversions for 32-bit integers\n\t\t\tcase cgltf_component_type_r_16:\n\t\t\t\treturn *((const int16_t*) in) / (cgltf_float)32767;\n\t\t\tcase cgltf_component_type_r_16u:\n\t\t\t\treturn *((const uint16_t*) in) / (cgltf_float)65535;\n\t\t\tcase cgltf_component_type_r_8:\n\t\t\t\treturn *((const int8_t*) in) / (cgltf_float)127;\n\t\t\tcase cgltf_component_type_r_8u:\n\t\t\t\treturn *((const uint8_t*) in) / (cgltf_float)255;\n\t\t\tdefault:\n\t\t\t\treturn 0;\n\t\t}\n\t}\n\n\treturn (cgltf_float)cgltf_component_read_integer(in, component_type);\n}\n\nstatic cgltf_bool cgltf_element_read_float(const uint8_t* element, cgltf_type type, cgltf_component_type component_type, cgltf_bool normalized, cgltf_float* out, cgltf_size element_size)\n{\n\tcgltf_size num_components = cgltf_num_components(type);\n\n\tif (element_size < num_components) {\n\t\treturn 0;\n\t}\n\n\t// There are three special cases for component extraction, see #data-alignment in the 2.0 spec.\n\n\tcgltf_size component_size = cgltf_component_size(component_type);\n\n\tif (type == cgltf_type_mat2 && component_size == 1)\n\t{\n\t\tout[0] = cgltf_component_read_float(element, component_type, normalized);\n\t\tout[1] = cgltf_component_read_float(element + 1, component_type, normalized);\n\t\tout[2] = cgltf_component_read_float(element + 4, component_type, normalized);\n\t\tout[3] = cgltf_component_read_float(element + 5, component_type, normalized);\n\t\treturn 1;\n\t}\n\n\tif (type == cgltf_type_mat3 && component_size == 1)\n\t{\n\t\tout[0] = cgltf_component_read_float(element, component_type, normalized);\n\t\tout[1] = cgltf_component_read_float(element + 1, component_type, normalized);\n\t\tout[2] = cgltf_component_read_float(element + 2, component_type, normalized);\n\t\tout[3] = cgltf_component_read_float(element + 4, component_type, normalized);\n\t\tout[4] = cgltf_component_read_float(element + 5, component_type, normalized);\n\t\tout[5] = cgltf_component_read_float(element + 6, component_type, normalized);\n\t\tout[6] = cgltf_component_read_float(element + 8, component_type, normalized);\n\t\tout[7] = cgltf_component_read_float(element + 9, component_type, normalized);\n\t\tout[8] = cgltf_component_read_float(element + 10, component_type, normalized);\n\t\treturn 1;\n\t}\n\n\tif (type == cgltf_type_mat3 && component_size == 2)\n\t{\n\t\tout[0] = cgltf_component_read_float(element, component_type, normalized);\n\t\tout[1] = cgltf_component_read_float(element + 2, component_type, normalized);\n\t\tout[2] = cgltf_component_read_float(element + 4, component_type, normalized);\n\t\tout[3] = cgltf_component_read_float(element + 8, component_type, normalized);\n\t\tout[4] = cgltf_component_read_float(element + 10, component_type, normalized);\n\t\tout[5] = cgltf_component_read_float(element + 12, component_type, normalized);\n\t\tout[6] = cgltf_component_read_float(element + 16, component_type, normalized);\n\t\tout[7] = cgltf_component_read_float(element + 18, component_type, normalized);\n\t\tout[8] = cgltf_component_read_float(element + 20, component_type, normalized);\n\t\treturn 1;\n\t}\n\n\tfor (cgltf_size i = 0; i < num_components; ++i)\n\t{\n\t\tout[i] = cgltf_component_read_float(element + component_size * i, component_type, normalized);\n\t}\n\treturn 1;\n}\n\nconst uint8_t* cgltf_buffer_view_data(const cgltf_buffer_view* view)\n{\n\tif (view->data)\n\t\treturn (const uint8_t*)view->data;\n\n\tif (!view->buffer->data)\n\t\treturn NULL;\n\n\tconst uint8_t* result = (const uint8_t*)view->buffer->data;\n\tresult += view->offset;\n\treturn result;\n}\n\nconst cgltf_accessor* cgltf_find_accessor(const cgltf_primitive* prim, cgltf_attribute_type type, cgltf_int index)\n{\n\tfor (cgltf_size i = 0; i < prim->attributes_count; ++i)\n\t{\n\t\tconst cgltf_attribute* attr = &prim->attributes[i];\n\t\tif (attr->type == type && attr->index == index)\n\t\t\treturn attr->data;\n\t}\n\n\treturn NULL;\n}\n\nstatic const uint8_t* cgltf_find_sparse_index(const cgltf_accessor* accessor, cgltf_size needle)\n{\n\tconst cgltf_accessor_sparse* sparse = &accessor->sparse;\n\tconst uint8_t* index_data = cgltf_buffer_view_data(sparse->indices_buffer_view);\n\tconst uint8_t* value_data = cgltf_buffer_view_data(sparse->values_buffer_view);\n\n\tif (index_data == NULL || value_data == NULL)\n\t\treturn NULL;\n\n\tindex_data += sparse->indices_byte_offset;\n\tvalue_data += sparse->values_byte_offset;\n\n\tcgltf_size index_stride = cgltf_component_size(sparse->indices_component_type);\n\n\tcgltf_size offset = 0;\n\tcgltf_size length = sparse->count;\n\n\twhile (length)\n\t{\n\t\tcgltf_size rem = length % 2;\n\t\tlength /= 2;\n\n\t\tcgltf_size index = cgltf_component_read_index(index_data + (offset + length) * index_stride, sparse->indices_component_type);\n\t\toffset += index < needle ? length + rem : 0;\n\t}\n\n\tif (offset == sparse->count)\n\t\treturn NULL;\n\n\tcgltf_size index = cgltf_component_read_index(index_data + offset * index_stride, sparse->indices_component_type);\n\treturn index == needle ? value_data + offset * accessor->stride : NULL;\n}\n\ncgltf_bool cgltf_accessor_read_float(const cgltf_accessor* accessor, cgltf_size index, cgltf_float* out, cgltf_size element_size)\n{\n\tif (accessor->is_sparse)\n\t{\n\t\tconst uint8_t* element = cgltf_find_sparse_index(accessor, index);\n\t\tif (element)\n\t\t\treturn cgltf_element_read_float(element, accessor->type, accessor->component_type, accessor->normalized, out, element_size);\n\t}\n\tif (accessor->buffer_view == NULL)\n\t{\n\t\tmemset(out, 0, element_size * sizeof(cgltf_float));\n\t\treturn 1;\n\t}\n\tconst uint8_t* element = cgltf_buffer_view_data(accessor->buffer_view);\n\tif (element == NULL)\n\t{\n\t\treturn 0;\n\t}\n\telement += accessor->offset + accessor->stride * index;\n\treturn cgltf_element_read_float(element, accessor->type, accessor->component_type, accessor->normalized, out, element_size);\n}\n\ncgltf_size cgltf_accessor_unpack_floats(const cgltf_accessor* accessor, cgltf_float* out, cgltf_size float_count)\n{\n\tcgltf_size floats_per_element = cgltf_num_components(accessor->type);\n\tcgltf_size available_floats = accessor->count * floats_per_element;\n\tif (out == NULL)\n\t{\n\t\treturn available_floats;\n\t}\n\n\tfloat_count = available_floats < float_count ? available_floats : float_count;\n\tcgltf_size element_count = float_count / floats_per_element;\n\n\t// First pass: convert each element in the base accessor.\n\tif (accessor->buffer_view == NULL)\n\t{\n\t\tmemset(out, 0, element_count * floats_per_element * sizeof(cgltf_float));\n\t}\n\telse\n\t{\n\t\tconst uint8_t* element = cgltf_buffer_view_data(accessor->buffer_view);\n\t\tif (element == NULL)\n\t\t{\n\t\t\treturn 0;\n\t\t}\n\t\telement += accessor->offset;\n\n\t\tif (accessor->component_type == cgltf_component_type_r_32f && accessor->stride == floats_per_element * sizeof(cgltf_float))\n\t\t{\n\t\t\tmemcpy(out, element, element_count * floats_per_element * sizeof(cgltf_float));\n\t\t}\n\t\telse\n\t\t{\n\t\t\tcgltf_float* dest = out;\n\n\t\t\tfor (cgltf_size index = 0; index < element_count; index++, dest += floats_per_element, element += accessor->stride)\n\t\t\t{\n\t\t\t\tif (!cgltf_element_read_float(element, accessor->type, accessor->component_type, accessor->normalized, dest, floats_per_element))\n\t\t\t\t{\n\t\t\t\t\treturn 0;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t// Second pass: write out each element in the sparse accessor.\n\tif (accessor->is_sparse)\n\t{\n\t\tconst cgltf_accessor_sparse* sparse = &accessor->sparse;\n\n\t\tconst uint8_t* index_data = cgltf_buffer_view_data(sparse->indices_buffer_view);\n\t\tconst uint8_t* reader_head = cgltf_buffer_view_data(sparse->values_buffer_view);\n\n\t\tif (index_data == NULL || reader_head == NULL)\n\t\t{\n\t\t\treturn 0;\n\t\t}\n\n\t\tindex_data += sparse->indices_byte_offset;\n\t\treader_head += sparse->values_byte_offset;\n\n\t\tcgltf_size index_stride = cgltf_component_size(sparse->indices_component_type);\n\t\tfor (cgltf_size reader_index = 0; reader_index < sparse->count; reader_index++, index_data += index_stride, reader_head += accessor->stride)\n\t\t{\n\t\t\tsize_t writer_index = cgltf_component_read_index(index_data, sparse->indices_component_type);\n\t\t\tfloat* writer_head = out + writer_index * floats_per_element;\n\n\t\t\tif (!cgltf_element_read_float(reader_head, accessor->type, accessor->component_type, accessor->normalized, writer_head, floats_per_element))\n\t\t\t{\n\t\t\t\treturn 0;\n\t\t\t}\n\t\t}\n\t}\n\n\treturn element_count * floats_per_element;\n}\n\nstatic cgltf_uint cgltf_component_read_uint(const void* in, cgltf_component_type component_type)\n{\n\tswitch (component_type)\n\t{\n\t\tcase cgltf_component_type_r_8:\n\t\t\treturn *((const int8_t*) in);\n\n\t\tcase cgltf_component_type_r_8u:\n\t\t\treturn *((const uint8_t*) in);\n\n\t\tcase cgltf_component_type_r_16:\n\t\t\treturn *((const int16_t*) in);\n\n\t\tcase cgltf_component_type_r_16u:\n\t\t\treturn *((const uint16_t*) in);\n\n\t\tcase cgltf_component_type_r_32u:\n\t\t\treturn *((const uint32_t*) in);\n\n\t\tdefault:\n\t\t\treturn 0;\n\t}\n}\n\nstatic cgltf_bool cgltf_element_read_uint(const uint8_t* element, cgltf_type type, cgltf_component_type component_type, cgltf_uint* out, cgltf_size element_size)\n{\n\tcgltf_size num_components = cgltf_num_components(type);\n\n\tif (element_size < num_components)\n\t{\n\t\treturn 0;\n\t}\n\n\t// Reading integer matrices is not a valid use case\n\tif (type == cgltf_type_mat2 || type == cgltf_type_mat3 || type == cgltf_type_mat4)\n\t{\n\t\treturn 0;\n\t}\n\n\tcgltf_size component_size = cgltf_component_size(component_type);\n\n\tfor (cgltf_size i = 0; i < num_components; ++i)\n\t{\n\t\tout[i] = cgltf_component_read_uint(element + component_size * i, component_type);\n\t}\n\treturn 1;\n}\n\ncgltf_bool cgltf_accessor_read_uint(const cgltf_accessor* accessor, cgltf_size index, cgltf_uint* out, cgltf_size element_size)\n{\n\tif (accessor->is_sparse)\n\t{\n\t\tconst uint8_t* element = cgltf_find_sparse_index(accessor, index);\n\t\tif (element)\n\t\t\treturn cgltf_element_read_uint(element, accessor->type, accessor->component_type, out, element_size);\n\t}\n\tif (accessor->buffer_view == NULL)\n\t{\n\t\tmemset(out, 0, element_size * sizeof(cgltf_uint));\n\t\treturn 1;\n\t}\n\tconst uint8_t* element = cgltf_buffer_view_data(accessor->buffer_view);\n\tif (element == NULL)\n\t{\n\t\treturn 0;\n\t}\n\telement += accessor->offset + accessor->stride * index;\n\treturn cgltf_element_read_uint(element, accessor->type, accessor->component_type, out, element_size);\n}\n\ncgltf_size cgltf_accessor_read_index(const cgltf_accessor* accessor, cgltf_size index)\n{\n\tif (accessor->is_sparse)\n\t{\n\t\tconst uint8_t* element = cgltf_find_sparse_index(accessor, index);\n\t\tif (element)\n\t\t\treturn cgltf_component_read_index(element, accessor->component_type);\n\t}\n\tif (accessor->buffer_view == NULL)\n\t{\n\t\treturn 0;\n\t}\n\tconst uint8_t* element = cgltf_buffer_view_data(accessor->buffer_view);\n\tif (element == NULL)\n\t{\n\t\treturn 0; // This is an error case, but we can't communicate the error with existing interface.\n\t}\n\telement += accessor->offset + accessor->stride * index;\n\treturn cgltf_component_read_index(element, accessor->component_type);\n}\n\ncgltf_size cgltf_mesh_index(const cgltf_data* data, const cgltf_mesh* object)\n{\n\tassert(object && (cgltf_size)(object - data->meshes) < data->meshes_count);\n\treturn (cgltf_size)(object - data->meshes);\n}\n\ncgltf_size cgltf_material_index(const cgltf_data* data, const cgltf_material* object)\n{\n\tassert(object && (cgltf_size)(object - data->materials) < data->materials_count);\n\treturn (cgltf_size)(object - data->materials);\n}\n\ncgltf_size cgltf_accessor_index(const cgltf_data* data, const cgltf_accessor* object)\n{\n\tassert(object && (cgltf_size)(object - data->accessors) < data->accessors_count);\n\treturn (cgltf_size)(object - data->accessors);\n}\n\ncgltf_size cgltf_buffer_view_index(const cgltf_data* data, const cgltf_buffer_view* object)\n{\n\tassert(object && (cgltf_size)(object - data->buffer_views) < data->buffer_views_count);\n\treturn (cgltf_size)(object - data->buffer_views);\n}\n\ncgltf_size cgltf_buffer_index(const cgltf_data* data, const cgltf_buffer* object)\n{\n\tassert(object && (cgltf_size)(object - data->buffers) < data->buffers_count);\n\treturn (cgltf_size)(object - data->buffers);\n}\n\ncgltf_size cgltf_image_index(const cgltf_data* data, const cgltf_image* object)\n{\n\tassert(object && (cgltf_size)(object - data->images) < data->images_count);\n\treturn (cgltf_size)(object - data->images);\n}\n\ncgltf_size cgltf_texture_index(const cgltf_data* data, const cgltf_texture* object)\n{\n\tassert(object && (cgltf_size)(object - data->textures) < data->textures_count);\n\treturn (cgltf_size)(object - data->textures);\n}\n\ncgltf_size cgltf_sampler_index(const cgltf_data* data, const cgltf_sampler* object)\n{\n\tassert(object && (cgltf_size)(object - data->samplers) < data->samplers_count);\n\treturn (cgltf_size)(object - data->samplers);\n}\n\ncgltf_size cgltf_skin_index(const cgltf_data* data, const cgltf_skin* object)\n{\n\tassert(object && (cgltf_size)(object - data->skins) < data->skins_count);\n\treturn (cgltf_size)(object - data->skins);\n}\n\ncgltf_size cgltf_camera_index(const cgltf_data* data, const cgltf_camera* object)\n{\n\tassert(object && (cgltf_size)(object - data->cameras) < data->cameras_count);\n\treturn (cgltf_size)(object - data->cameras);\n}\n\ncgltf_size cgltf_light_index(const cgltf_data* data, const cgltf_light* object)\n{\n\tassert(object && (cgltf_size)(object - data->lights) < data->lights_count);\n\treturn (cgltf_size)(object - data->lights);\n}\n\ncgltf_size cgltf_node_index(const cgltf_data* data, const cgltf_node* object)\n{\n\tassert(object && (cgltf_size)(object - data->nodes) < data->nodes_count);\n\treturn (cgltf_size)(object - data->nodes);\n}\n\ncgltf_size cgltf_scene_index(const cgltf_data* data, const cgltf_scene* object)\n{\n\tassert(object && (cgltf_size)(object - data->scenes) < data->scenes_count);\n\treturn (cgltf_size)(object - data->scenes);\n}\n\ncgltf_size cgltf_animation_index(const cgltf_data* data, const cgltf_animation* object)\n{\n\tassert(object && (cgltf_size)(object - data->animations) < data->animations_count);\n\treturn (cgltf_size)(object - data->animations);\n}\n\ncgltf_size cgltf_animation_sampler_index(const cgltf_animation* animation, const cgltf_animation_sampler* object)\n{\n\tassert(object && (cgltf_size)(object - animation->samplers) < animation->samplers_count);\n\treturn (cgltf_size)(object - animation->samplers);\n}\n\ncgltf_size cgltf_animation_channel_index(const cgltf_animation* animation, const cgltf_animation_channel* object)\n{\n\tassert(object && (cgltf_size)(object - animation->channels) < animation->channels_count);\n\treturn (cgltf_size)(object - animation->channels);\n}\n\ncgltf_size cgltf_accessor_unpack_indices(const cgltf_accessor* accessor, void* out, cgltf_size out_component_size, cgltf_size index_count)\n{\n\tif (out == NULL)\n\t{\n\t\treturn accessor->count;\n\t}\n\n\tcgltf_size numbers_per_element = cgltf_num_components(accessor->type);\n\tcgltf_size available_numbers = accessor->count * numbers_per_element;\n\n\tindex_count = available_numbers < index_count ? available_numbers : index_count;\n\tcgltf_size index_component_size = cgltf_component_size(accessor->component_type);\n\n\tif (accessor->is_sparse)\n\t{\n\t\treturn 0;\n\t}\n\tif (accessor->buffer_view == NULL)\n\t{\n\t\treturn 0;\n\t}\n\tif (index_component_size > out_component_size)\n\t{\n\t\treturn 0;\n\t}\n\tconst uint8_t* element = cgltf_buffer_view_data(accessor->buffer_view);\n\tif (element == NULL)\n\t{\n\t\treturn 0;\n\t}\n\telement += accessor->offset;\n\n\tif (index_component_size == out_component_size && accessor->stride == out_component_size * numbers_per_element)\n\t{\n\t\tmemcpy(out, element, index_count * index_component_size);\n\t\treturn index_count;\n\t}\n\n\t// Data couldn't be copied with memcpy due to stride being larger than the component size.\n\t// OR\n\t// The component size of the output array is larger than the component size of the index data, so index data will be padded.\n\tswitch (out_component_size)\n\t{\n\tcase 1:\n\t\tfor (cgltf_size index = 0; index < index_count; index++, element += accessor->stride)\n\t\t{\n\t\t\t((uint8_t*)out)[index] = (uint8_t)cgltf_component_read_index(element, accessor->component_type);\n\t\t}\n\t\tbreak;\n\tcase 2:\n\t\tfor (cgltf_size index = 0; index < index_count; index++, element += accessor->stride)\n\t\t{\n\t\t\t((uint16_t*)out)[index] = (uint16_t)cgltf_component_read_index(element, accessor->component_type);\n\t\t}\n\t\tbreak;\n\tcase 4:\n\t\tfor (cgltf_size index = 0; index < index_count; index++, element += accessor->stride)\n\t\t{\n\t\t\t((uint32_t*)out)[index] = (uint32_t)cgltf_component_read_index(element, accessor->component_type);\n\t\t}\n\t\tbreak;\n\tdefault:\n\t\treturn 0;\n\t}\n\n\treturn index_count;\n}\n\n#define CGLTF_ERROR_JSON -1\n#define CGLTF_ERROR_NOMEM -2\n#define CGLTF_ERROR_LEGACY -3\n\n#define CGLTF_CHECK_TOKTYPE(tok_, type_) if ((tok_).type != (type_)) { return CGLTF_ERROR_JSON; }\n#define CGLTF_CHECK_TOKTYPE_RET(tok_, type_, ret_) if ((tok_).type != (type_)) { return ret_; }\n#define CGLTF_CHECK_KEY(tok_) if ((tok_).type != JSMN_STRING || (tok_).size == 0) { return CGLTF_ERROR_JSON; } /* checking size for 0 verifies that a value follows the key */\n\n#define CGLTF_PTRINDEX(type, idx) (type*)((cgltf_size)idx + 1)\n#define CGLTF_PTRFIXUP(var, data, size) if (var) { if ((cgltf_size)var > size) { return CGLTF_ERROR_JSON; } var = &data[(cgltf_size)var-1]; }\n#define CGLTF_PTRFIXUP_REQ(var, data, size) if (!var || (cgltf_size)var > size) { return CGLTF_ERROR_JSON; } var = &data[(cgltf_size)var-1];\n\nstatic int cgltf_json_strcmp(jsmntok_t const* tok, const uint8_t* json_chunk, const char* str)\n{\n\tCGLTF_CHECK_TOKTYPE(*tok, JSMN_STRING);\n\tsize_t const str_len = strlen(str);\n\tsize_t const name_length = (size_t)(tok->end - tok->start);\n\treturn (str_len == name_length) ? strncmp((const char*)json_chunk + tok->start, str, str_len) : 128;\n}\n\nstatic int cgltf_json_to_int(jsmntok_t const* tok, const uint8_t* json_chunk)\n{\n\tCGLTF_CHECK_TOKTYPE(*tok, JSMN_PRIMITIVE);\n\tchar tmp[128];\n\tint size = (size_t)(tok->end - tok->start) < sizeof(tmp) ? (int)(tok->end - tok->start) : (int)(sizeof(tmp) - 1);\n\tstrncpy(tmp, (const char*)json_chunk + tok->start, size);\n\ttmp[size] = 0;\n\treturn CGLTF_ATOI(tmp);\n}\n\nstatic cgltf_size cgltf_json_to_size(jsmntok_t const* tok, const uint8_t* json_chunk)\n{\n\tCGLTF_CHECK_TOKTYPE_RET(*tok, JSMN_PRIMITIVE, 0);\n\tchar tmp[128];\n\tint size = (size_t)(tok->end - tok->start) < sizeof(tmp) ? (int)(tok->end - tok->start) : (int)(sizeof(tmp) - 1);\n\tstrncpy(tmp, (const char*)json_chunk + tok->start, size);\n\ttmp[size] = 0;\n\tlong long res = CGLTF_ATOLL(tmp);\n\treturn res < 0 ? 0 : (cgltf_size)res;\n}\n\nstatic cgltf_float cgltf_json_to_float(jsmntok_t const* tok, const uint8_t* json_chunk)\n{\n\tCGLTF_CHECK_TOKTYPE(*tok, JSMN_PRIMITIVE);\n\tchar tmp[128];\n\tint size = (size_t)(tok->end - tok->start) < sizeof(tmp) ? (int)(tok->end - tok->start) : (int)(sizeof(tmp) - 1);\n\tstrncpy(tmp, (const char*)json_chunk + tok->start, size);\n\ttmp[size] = 0;\n\treturn (cgltf_float)CGLTF_ATOF(tmp);\n}\n\nstatic cgltf_bool cgltf_json_to_bool(jsmntok_t const* tok, const uint8_t* json_chunk)\n{\n\tint size = (int)(tok->end - tok->start);\n\treturn size == 4 && memcmp(json_chunk + tok->start, \"true\", 4) == 0;\n}\n\nstatic int cgltf_skip_json(jsmntok_t const* tokens, int i)\n{\n\tint end = i + 1;\n\n\twhile (i < end)\n\t{\n\t\tswitch (tokens[i].type)\n\t\t{\n\t\tcase JSMN_OBJECT:\n\t\t\tend += tokens[i].size * 2;\n\t\t\tbreak;\n\n\t\tcase JSMN_ARRAY:\n\t\t\tend += tokens[i].size;\n\t\t\tbreak;\n\n\t\tcase JSMN_PRIMITIVE:\n\t\tcase JSMN_STRING:\n\t\t\tbreak;\n\n\t\tdefault:\n\t\t\treturn -1;\n\t\t}\n\n\t\ti++;\n\t}\n\n\treturn i;\n}\n\nstatic void cgltf_fill_float_array(float* out_array, int size, float value)\n{\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tout_array[j] = value;\n\t}\n}\n\nstatic int cgltf_parse_json_float_array(jsmntok_t const* tokens, int i, const uint8_t* json_chunk, float* out_array, int size)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_ARRAY);\n\tif (tokens[i].size != size)\n\t{\n\t\treturn CGLTF_ERROR_JSON;\n\t}\n\t++i;\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_PRIMITIVE);\n\t\tout_array[j] = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t++i;\n\t}\n\treturn i;\n}\n\nstatic int cgltf_parse_json_string(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, char** out_string)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_STRING);\n\tif (*out_string)\n\t{\n\t\treturn CGLTF_ERROR_JSON;\n\t}\n\tint size = (int)(tokens[i].end - tokens[i].start);\n\tchar* result = (char*)options->memory.alloc_func(options->memory.user_data, size + 1);\n\tif (!result)\n\t{\n\t\treturn CGLTF_ERROR_NOMEM;\n\t}\n\tstrncpy(result, (const char*)json_chunk + tokens[i].start, size);\n\tresult[size] = 0;\n\t*out_string = result;\n\treturn i + 1;\n}\n\nstatic int cgltf_parse_json_array(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, size_t element_size, void** out_array, cgltf_size* out_size)\n{\n\t(void)json_chunk;\n\tif (tokens[i].type != JSMN_ARRAY)\n\t{\n\t\treturn tokens[i].type == JSMN_OBJECT ? CGLTF_ERROR_LEGACY : CGLTF_ERROR_JSON;\n\t}\n\tif (*out_array)\n\t{\n\t\treturn CGLTF_ERROR_JSON;\n\t}\n\tint size = tokens[i].size;\n\tvoid* result = cgltf_calloc(options, element_size, size);\n\tif (!result)\n\t{\n\t\treturn CGLTF_ERROR_NOMEM;\n\t}\n\t*out_array = result;\n\t*out_size = size;\n\treturn i + 1;\n}\n\nstatic int cgltf_parse_json_string_array(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, char*** out_array, cgltf_size* out_size)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_ARRAY);\n\ti = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(char*), (void**)out_array, out_size);\n\tif (i < 0)\n\t{\n\t\treturn i;\n\t}\n\n\tfor (cgltf_size j = 0; j < *out_size; ++j)\n\t{\n\t\ti = cgltf_parse_json_string(options, tokens, i, json_chunk, j + (*out_array));\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\treturn i;\n}\n\nstatic void cgltf_parse_attribute_type(const char* name, cgltf_attribute_type* out_type, int* out_index)\n{\n\tif (*name == '_')\n\t{\n\t\t*out_type = cgltf_attribute_type_custom;\n\t\treturn;\n\t}\n\n\tconst char* us = strchr(name, '_');\n\tsize_t len = us ? (size_t)(us - name) : strlen(name);\n\n\tif (len == 8 && strncmp(name, \"POSITION\", 8) == 0)\n\t{\n\t\t*out_type = cgltf_attribute_type_position;\n\t}\n\telse if (len == 6 && strncmp(name, \"NORMAL\", 6) == 0)\n\t{\n\t\t*out_type = cgltf_attribute_type_normal;\n\t}\n\telse if (len == 7 && strncmp(name, \"TANGENT\", 7) == 0)\n\t{\n\t\t*out_type = cgltf_attribute_type_tangent;\n\t}\n\telse if (len == 8 && strncmp(name, \"TEXCOORD\", 8) == 0)\n\t{\n\t\t*out_type = cgltf_attribute_type_texcoord;\n\t}\n\telse if (len == 5 && strncmp(name, \"COLOR\", 5) == 0)\n\t{\n\t\t*out_type = cgltf_attribute_type_color;\n\t}\n\telse if (len == 6 && strncmp(name, \"JOINTS\", 6) == 0)\n\t{\n\t\t*out_type = cgltf_attribute_type_joints;\n\t}\n\telse if (len == 7 && strncmp(name, \"WEIGHTS\", 7) == 0)\n\t{\n\t\t*out_type = cgltf_attribute_type_weights;\n\t}\n\telse\n\t{\n\t\t*out_type = cgltf_attribute_type_invalid;\n\t}\n\n\tif (us && *out_type != cgltf_attribute_type_invalid)\n\t{\n\t\t*out_index = CGLTF_ATOI(us + 1);\n\t\tif (*out_index < 0)\n\t\t{\n\t\t\t*out_type = cgltf_attribute_type_invalid;\n\t\t\t*out_index = 0;\n\t\t}\n\t}\n}\n\nstatic int cgltf_parse_json_attribute_list(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_attribute** out_attributes, cgltf_size* out_attributes_count)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\tif (*out_attributes)\n\t{\n\t\treturn CGLTF_ERROR_JSON;\n\t}\n\n\t*out_attributes_count = tokens[i].size;\n\t*out_attributes = (cgltf_attribute*)cgltf_calloc(options, sizeof(cgltf_attribute), *out_attributes_count);\n\t++i;\n\n\tif (!*out_attributes)\n\t{\n\t\treturn CGLTF_ERROR_NOMEM;\n\t}\n\n\tfor (cgltf_size j = 0; j < *out_attributes_count; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\ti = cgltf_parse_json_string(options, tokens, i, json_chunk, &(*out_attributes)[j].name);\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn CGLTF_ERROR_JSON;\n\t\t}\n\n\t\tcgltf_parse_attribute_type((*out_attributes)[j].name, &(*out_attributes)[j].type, &(*out_attributes)[j].index);\n\n\t\t(*out_attributes)[j].data = CGLTF_PTRINDEX(cgltf_accessor, cgltf_json_to_int(tokens + i, json_chunk));\n\t\t++i;\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_extras(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_extras* out_extras)\n{\n\tif (out_extras->data)\n\t{\n\t\treturn CGLTF_ERROR_JSON;\n\t}\n\n\t/* fill deprecated fields for now, this will be removed in the future */\n\tout_extras->start_offset = tokens[i].start;\n\tout_extras->end_offset = tokens[i].end;\n\n\tsize_t start = tokens[i].start;\n\tsize_t size = tokens[i].end - start;\n\tout_extras->data = (char*)options->memory.alloc_func(options->memory.user_data, size + 1);\n\tif (!out_extras->data)\n\t{\n\t\treturn CGLTF_ERROR_NOMEM;\n\t}\n\tstrncpy(out_extras->data, (const char*)json_chunk + start, size);\n\tout_extras->data[size] = '\\0';\n\n\ti = cgltf_skip_json(tokens, i);\n\treturn i;\n}\n\nstatic int cgltf_parse_json_unprocessed_extension(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_extension* out_extension)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_STRING);\n\tCGLTF_CHECK_TOKTYPE(tokens[i+1], JSMN_OBJECT);\n\tif (out_extension->name)\n\t{\n\t\treturn CGLTF_ERROR_JSON;\n\t}\n\n\tcgltf_size name_length = tokens[i].end - tokens[i].start;\n\tout_extension->name = (char*)options->memory.alloc_func(options->memory.user_data, name_length + 1);\n\tif (!out_extension->name)\n\t{\n\t\treturn CGLTF_ERROR_NOMEM;\n\t}\n\tstrncpy(out_extension->name, (const char*)json_chunk + tokens[i].start, name_length);\n\tout_extension->name[name_length] = 0;\n\ti++;\n\n\tsize_t start = tokens[i].start;\n\tsize_t size = tokens[i].end - start;\n\tout_extension->data = (char*)options->memory.alloc_func(options->memory.user_data, size + 1);\n\tif (!out_extension->data)\n\t{\n\t\treturn CGLTF_ERROR_NOMEM;\n\t}\n\tstrncpy(out_extension->data, (const char*)json_chunk + start, size);\n\tout_extension->data[size] = '\\0';\n\n\ti = cgltf_skip_json(tokens, i);\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_unprocessed_extensions(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_size* out_extensions_count, cgltf_extension** out_extensions)\n{\n\t++i;\n\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\tif(*out_extensions)\n\t{\n\t\treturn CGLTF_ERROR_JSON;\n\t}\n\n\tint extensions_size = tokens[i].size;\n\t*out_extensions_count = 0;\n\t*out_extensions = (cgltf_extension*)cgltf_calloc(options, sizeof(cgltf_extension), extensions_size);\n\n\tif (!*out_extensions)\n\t{\n\t\treturn CGLTF_ERROR_NOMEM;\n\t}\n\n\t++i;\n\n\tfor (int j = 0; j < extensions_size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tcgltf_size extension_index = (*out_extensions_count)++;\n\t\tcgltf_extension* extension = &((*out_extensions)[extension_index]);\n\t\ti = cgltf_parse_json_unprocessed_extension(options, tokens, i, json_chunk, extension);\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\treturn i;\n}\n\nstatic int cgltf_parse_json_draco_mesh_compression(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_draco_mesh_compression* out_draco_mesh_compression)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\tint size = tokens[i].size;\n\t++i;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens + i, json_chunk, \"attributes\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_attribute_list(options, tokens, i + 1, json_chunk, &out_draco_mesh_compression->attributes, &out_draco_mesh_compression->attributes_count);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"bufferView\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_draco_mesh_compression->buffer_view = CGLTF_PTRINDEX(cgltf_buffer_view, cgltf_json_to_int(tokens + i, json_chunk));\n\t\t\t++i;\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_mesh_gpu_instancing(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_mesh_gpu_instancing* out_mesh_gpu_instancing)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\tint size = tokens[i].size;\n\t++i;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens + i, json_chunk, \"attributes\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_attribute_list(options, tokens, i + 1, json_chunk, &out_mesh_gpu_instancing->attributes, &out_mesh_gpu_instancing->attributes_count);\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_material_mapping_data(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_material_mapping* out_mappings, cgltf_size* offset)\n{\n\t(void)options;\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_ARRAY);\n\n\tint size = tokens[i].size;\n\t++i;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\t\tint obj_size = tokens[i].size;\n\t\t++i;\n\n\t\tint material = -1;\n\t\tint variants_tok = -1;\n\t\tint extras_tok = -1;\n\n\t\tfor (int k = 0; k < obj_size; ++k)\n\t\t{\n\t\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\t\tif (cgltf_json_strcmp(tokens + i, json_chunk, \"material\") == 0)\n\t\t\t{\n\t\t\t\t++i;\n\t\t\t\tmaterial = cgltf_json_to_int(tokens + i, json_chunk);\n\t\t\t\t++i;\n\t\t\t}\n\t\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"variants\") == 0)\n\t\t\t{\n\t\t\t\tvariants_tok = i+1;\n\t\t\t\tCGLTF_CHECK_TOKTYPE(tokens[variants_tok], JSMN_ARRAY);\n\n\t\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t\t}\n\t\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extras\") == 0)\n\t\t\t{\n\t\t\t\textras_tok = i + 1;\n\t\t\t\ti = cgltf_skip_json(tokens, extras_tok);\n\t\t\t}\n\t\t\telse\n\t\t\t{\n\t\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t\t}\n\n\t\t\tif (i < 0)\n\t\t\t{\n\t\t\t\treturn i;\n\t\t\t}\n\t\t}\n\n\t\tif (material < 0 || variants_tok < 0)\n\t\t{\n\t\t\treturn CGLTF_ERROR_JSON;\n\t\t}\n\n\t\tif (out_mappings)\n\t\t{\n\t\t\tfor (int k = 0; k < tokens[variants_tok].size; ++k)\n\t\t\t{\n\t\t\t\tint variant = cgltf_json_to_int(&tokens[variants_tok + 1 + k], json_chunk);\n\t\t\t\tif (variant < 0)\n\t\t\t\t\treturn variant;\n\n\t\t\t\tout_mappings[*offset].material = CGLTF_PTRINDEX(cgltf_material, material);\n\t\t\t\tout_mappings[*offset].variant = variant;\n\n\t\t\t\tif (extras_tok >= 0)\n\t\t\t\t{\n\t\t\t\t\tint e = cgltf_parse_json_extras(options, tokens, extras_tok, json_chunk, &out_mappings[*offset].extras);\n\t\t\t\t\tif (e < 0)\n\t\t\t\t\t\treturn e;\n\t\t\t\t}\n\n\t\t\t\t(*offset)++;\n\t\t\t}\n\t\t}\n\t\telse\n\t\t{\n\t\t\t(*offset) += tokens[variants_tok].size;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_material_mappings(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_primitive* out_prim)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\tint size = tokens[i].size;\n\t++i;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens + i, json_chunk, \"mappings\") == 0)\n\t\t{\n\t\t\tif (out_prim->mappings)\n\t\t\t{\n\t\t\t\treturn CGLTF_ERROR_JSON;\n\t\t\t}\n\n\t\t\tcgltf_size mappings_offset = 0;\n\t\t\tint k = cgltf_parse_json_material_mapping_data(options, tokens, i + 1, json_chunk, NULL, &mappings_offset);\n\t\t\tif (k < 0)\n\t\t\t{\n\t\t\t\treturn k;\n\t\t\t}\n\n\t\t\tout_prim->mappings_count = mappings_offset;\n\t\t\tout_prim->mappings = (cgltf_material_mapping*)cgltf_calloc(options, sizeof(cgltf_material_mapping), out_prim->mappings_count);\n\n\t\t\tmappings_offset = 0;\n\t\t\ti = cgltf_parse_json_material_mapping_data(options, tokens, i + 1, json_chunk, out_prim->mappings, &mappings_offset);\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic cgltf_primitive_type cgltf_json_to_primitive_type(jsmntok_t const* tok, const uint8_t* json_chunk)\n{\n\tint type = cgltf_json_to_int(tok, json_chunk);\n\n\tswitch (type)\n\t{\n\tcase 0:\n\t\treturn cgltf_primitive_type_points;\n\tcase 1:\n\t\treturn cgltf_primitive_type_lines;\n\tcase 2:\n\t\treturn cgltf_primitive_type_line_loop;\n\tcase 3:\n\t\treturn cgltf_primitive_type_line_strip;\n\tcase 4:\n\t\treturn cgltf_primitive_type_triangles;\n\tcase 5:\n\t\treturn cgltf_primitive_type_triangle_strip;\n\tcase 6:\n\t\treturn cgltf_primitive_type_triangle_fan;\n\tdefault:\n\t\treturn cgltf_primitive_type_invalid;\n\t}\n}\n\nstatic int cgltf_parse_json_primitive(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_primitive* out_prim)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\tout_prim->type = cgltf_primitive_type_triangles;\n\n\tint size = tokens[i].size;\n\t++i;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"mode\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_prim->type = cgltf_json_to_primitive_type(tokens+i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"indices\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_prim->indices = CGLTF_PTRINDEX(cgltf_accessor, cgltf_json_to_int(tokens + i, json_chunk));\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"material\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_prim->material = CGLTF_PTRINDEX(cgltf_material, cgltf_json_to_int(tokens + i, json_chunk));\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"attributes\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_attribute_list(options, tokens, i + 1, json_chunk, &out_prim->attributes, &out_prim->attributes_count);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"targets\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_array(options, tokens, i + 1, json_chunk, sizeof(cgltf_morph_target), (void**)&out_prim->targets, &out_prim->targets_count);\n\t\t\tif (i < 0)\n\t\t\t{\n\t\t\t\treturn i;\n\t\t\t}\n\n\t\t\tfor (cgltf_size k = 0; k < out_prim->targets_count; ++k)\n\t\t\t{\n\t\t\t\ti = cgltf_parse_json_attribute_list(options, tokens, i, json_chunk, &out_prim->targets[k].attributes, &out_prim->targets[k].attributes_count);\n\t\t\t\tif (i < 0)\n\t\t\t\t{\n\t\t\t\t\treturn i;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extras\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_extras(options, tokens, i + 1, json_chunk, &out_prim->extras);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extensions\") == 0)\n\t\t{\n\t\t\t++i;\n\n\t\t\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\t\t\tif(out_prim->extensions)\n\t\t\t{\n\t\t\t\treturn CGLTF_ERROR_JSON;\n\t\t\t}\n\n\t\t\tint extensions_size = tokens[i].size;\n\t\t\tout_prim->extensions_count = 0;\n\t\t\tout_prim->extensions = (cgltf_extension*)cgltf_calloc(options, sizeof(cgltf_extension), extensions_size);\n\n\t\t\tif (!out_prim->extensions)\n\t\t\t{\n\t\t\t\treturn CGLTF_ERROR_NOMEM;\n\t\t\t}\n\n\t\t\t++i;\n\t\t\tfor (int k = 0; k < extensions_size; ++k)\n\t\t\t{\n\t\t\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\t\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"KHR_draco_mesh_compression\") == 0)\n\t\t\t\t{\n\t\t\t\t\tout_prim->has_draco_mesh_compression = 1;\n\t\t\t\t\ti = cgltf_parse_json_draco_mesh_compression(options, tokens, i + 1, json_chunk, &out_prim->draco_mesh_compression);\n\t\t\t\t}\n\t\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"KHR_materials_variants\") == 0)\n\t\t\t\t{\n\t\t\t\t\ti = cgltf_parse_json_material_mappings(options, tokens, i + 1, json_chunk, out_prim);\n\t\t\t\t}\n\t\t\t\telse\n\t\t\t\t{\n\t\t\t\t\ti = cgltf_parse_json_unprocessed_extension(options, tokens, i, json_chunk, &(out_prim->extensions[out_prim->extensions_count++]));\n\t\t\t\t}\n\n\t\t\t\tif (i < 0)\n\t\t\t\t{\n\t\t\t\t\treturn i;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_mesh(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_mesh* out_mesh)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\tint size = tokens[i].size;\n\t++i;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"name\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_mesh->name);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"primitives\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_array(options, tokens, i + 1, json_chunk, sizeof(cgltf_primitive), (void**)&out_mesh->primitives, &out_mesh->primitives_count);\n\t\t\tif (i < 0)\n\t\t\t{\n\t\t\t\treturn i;\n\t\t\t}\n\n\t\t\tfor (cgltf_size prim_index = 0; prim_index < out_mesh->primitives_count; ++prim_index)\n\t\t\t{\n\t\t\t\ti = cgltf_parse_json_primitive(options, tokens, i, json_chunk, &out_mesh->primitives[prim_index]);\n\t\t\t\tif (i < 0)\n\t\t\t\t{\n\t\t\t\t\treturn i;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"weights\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_array(options, tokens, i + 1, json_chunk, sizeof(cgltf_float), (void**)&out_mesh->weights, &out_mesh->weights_count);\n\t\t\tif (i < 0)\n\t\t\t{\n\t\t\t\treturn i;\n\t\t\t}\n\n\t\t\ti = cgltf_parse_json_float_array(tokens, i - 1, json_chunk, out_mesh->weights, (int)out_mesh->weights_count);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extras\") == 0)\n\t\t{\n\t\t\t++i;\n\n\t\t\tout_mesh->extras.start_offset = tokens[i].start;\n\t\t\tout_mesh->extras.end_offset = tokens[i].end;\n\n\t\t\tif (tokens[i].type == JSMN_OBJECT)\n\t\t\t{\n\t\t\t\tint extras_size = tokens[i].size;\n\t\t\t\t++i;\n\n\t\t\t\tfor (int k = 0; k < extras_size; ++k)\n\t\t\t\t{\n\t\t\t\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\t\t\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"targetNames\") == 0 && tokens[i+1].type == JSMN_ARRAY)\n\t\t\t\t\t{\n\t\t\t\t\t\ti = cgltf_parse_json_string_array(options, tokens, i + 1, json_chunk, &out_mesh->target_names, &out_mesh->target_names_count);\n\t\t\t\t\t}\n\t\t\t\t\telse\n\t\t\t\t\t{\n\t\t\t\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t\t\t\t}\n\n\t\t\t\t\tif (i < 0)\n\t\t\t\t\t{\n\t\t\t\t\t\treturn i;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t\telse\n\t\t\t{\n\t\t\t\ti = cgltf_skip_json(tokens, i);\n\t\t\t}\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extensions\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_mesh->extensions_count, &out_mesh->extensions);\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_meshes(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)\n{\n\ti = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_mesh), (void**)&out_data->meshes, &out_data->meshes_count);\n\tif (i < 0)\n\t{\n\t\treturn i;\n\t}\n\n\tfor (cgltf_size j = 0; j < out_data->meshes_count; ++j)\n\t{\n\t\ti = cgltf_parse_json_mesh(options, tokens, i, json_chunk, &out_data->meshes[j]);\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\treturn i;\n}\n\nstatic cgltf_component_type cgltf_json_to_component_type(jsmntok_t const* tok, const uint8_t* json_chunk)\n{\n\tint type = cgltf_json_to_int(tok, json_chunk);\n\n\tswitch (type)\n\t{\n\tcase 5120:\n\t\treturn cgltf_component_type_r_8;\n\tcase 5121:\n\t\treturn cgltf_component_type_r_8u;\n\tcase 5122:\n\t\treturn cgltf_component_type_r_16;\n\tcase 5123:\n\t\treturn cgltf_component_type_r_16u;\n\tcase 5125:\n\t\treturn cgltf_component_type_r_32u;\n\tcase 5126:\n\t\treturn cgltf_component_type_r_32f;\n\tdefault:\n\t\treturn cgltf_component_type_invalid;\n\t}\n}\n\nstatic int cgltf_parse_json_accessor_sparse(jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_accessor_sparse* out_sparse)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\tint size = tokens[i].size;\n\t++i;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"count\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_sparse->count = cgltf_json_to_size(tokens + i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"indices\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\t\t\tint indices_size = tokens[i].size;\n\t\t\t++i;\n\n\t\t\tfor (int k = 0; k < indices_size; ++k)\n\t\t\t{\n\t\t\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\t\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"bufferView\") == 0)\n\t\t\t\t{\n\t\t\t\t\t++i;\n\t\t\t\t\tout_sparse->indices_buffer_view = CGLTF_PTRINDEX(cgltf_buffer_view, cgltf_json_to_int(tokens + i, json_chunk));\n\t\t\t\t\t++i;\n\t\t\t\t}\n\t\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"byteOffset\") == 0)\n\t\t\t\t{\n\t\t\t\t\t++i;\n\t\t\t\t\tout_sparse->indices_byte_offset = cgltf_json_to_size(tokens + i, json_chunk);\n\t\t\t\t\t++i;\n\t\t\t\t}\n\t\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"componentType\") == 0)\n\t\t\t\t{\n\t\t\t\t\t++i;\n\t\t\t\t\tout_sparse->indices_component_type = cgltf_json_to_component_type(tokens + i, json_chunk);\n\t\t\t\t\t++i;\n\t\t\t\t}\n\t\t\t\telse\n\t\t\t\t{\n\t\t\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t\t\t}\n\n\t\t\t\tif (i < 0)\n\t\t\t\t{\n\t\t\t\t\treturn i;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"values\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\t\t\tint values_size = tokens[i].size;\n\t\t\t++i;\n\n\t\t\tfor (int k = 0; k < values_size; ++k)\n\t\t\t{\n\t\t\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\t\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"bufferView\") == 0)\n\t\t\t\t{\n\t\t\t\t\t++i;\n\t\t\t\t\tout_sparse->values_buffer_view = CGLTF_PTRINDEX(cgltf_buffer_view, cgltf_json_to_int(tokens + i, json_chunk));\n\t\t\t\t\t++i;\n\t\t\t\t}\n\t\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"byteOffset\") == 0)\n\t\t\t\t{\n\t\t\t\t\t++i;\n\t\t\t\t\tout_sparse->values_byte_offset = cgltf_json_to_size(tokens + i, json_chunk);\n\t\t\t\t\t++i;\n\t\t\t\t}\n\t\t\t\telse\n\t\t\t\t{\n\t\t\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t\t\t}\n\n\t\t\t\tif (i < 0)\n\t\t\t\t{\n\t\t\t\t\treturn i;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_accessor(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_accessor* out_accessor)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\tint size = tokens[i].size;\n\t++i;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens + i, json_chunk, \"name\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_accessor->name);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"bufferView\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_accessor->buffer_view = CGLTF_PTRINDEX(cgltf_buffer_view, cgltf_json_to_int(tokens + i, json_chunk));\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"byteOffset\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_accessor->offset =\n\t\t\t\t\tcgltf_json_to_size(tokens+i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"componentType\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_accessor->component_type = cgltf_json_to_component_type(tokens + i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"normalized\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_accessor->normalized = cgltf_json_to_bool(tokens+i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"count\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_accessor->count = cgltf_json_to_size(tokens+i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"type\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"SCALAR\") == 0)\n\t\t\t{\n\t\t\t\tout_accessor->type = cgltf_type_scalar;\n\t\t\t}\n\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"VEC2\") == 0)\n\t\t\t{\n\t\t\t\tout_accessor->type = cgltf_type_vec2;\n\t\t\t}\n\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"VEC3\") == 0)\n\t\t\t{\n\t\t\t\tout_accessor->type = cgltf_type_vec3;\n\t\t\t}\n\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"VEC4\") == 0)\n\t\t\t{\n\t\t\t\tout_accessor->type = cgltf_type_vec4;\n\t\t\t}\n\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"MAT2\") == 0)\n\t\t\t{\n\t\t\t\tout_accessor->type = cgltf_type_mat2;\n\t\t\t}\n\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"MAT3\") == 0)\n\t\t\t{\n\t\t\t\tout_accessor->type = cgltf_type_mat3;\n\t\t\t}\n\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"MAT4\") == 0)\n\t\t\t{\n\t\t\t\tout_accessor->type = cgltf_type_mat4;\n\t\t\t}\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"min\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_accessor->has_min = 1;\n\t\t\t// note: we can't parse the precise number of elements since type may not have been computed yet\n\t\t\tint min_size = tokens[i].size > 16 ? 16 : tokens[i].size;\n\t\t\ti = cgltf_parse_json_float_array(tokens, i, json_chunk, out_accessor->min, min_size);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"max\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_accessor->has_max = 1;\n\t\t\t// note: we can't parse the precise number of elements since type may not have been computed yet\n\t\t\tint max_size = tokens[i].size > 16 ? 16 : tokens[i].size;\n\t\t\ti = cgltf_parse_json_float_array(tokens, i, json_chunk, out_accessor->max, max_size);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"sparse\") == 0)\n\t\t{\n\t\t\tout_accessor->is_sparse = 1;\n\t\t\ti = cgltf_parse_json_accessor_sparse(tokens, i + 1, json_chunk, &out_accessor->sparse);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extras\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_extras(options, tokens, i + 1, json_chunk, &out_accessor->extras);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extensions\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_accessor->extensions_count, &out_accessor->extensions);\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_texture_transform(jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_texture_transform* out_texture_transform)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\tint size = tokens[i].size;\n\t++i;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens + i, json_chunk, \"offset\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_texture_transform->offset, 2);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"rotation\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_texture_transform->rotation = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"scale\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_texture_transform->scale, 2);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"texCoord\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_texture_transform->has_texcoord = 1;\n\t\t\tout_texture_transform->texcoord = cgltf_json_to_int(tokens + i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i + 1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_texture_view(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_texture_view* out_texture_view)\n{\n\t(void)options;\n\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\tout_texture_view->scale = 1.0f;\n\tcgltf_fill_float_array(out_texture_view->transform.scale, 2, 1.0f);\n\n\tint size = tokens[i].size;\n\t++i;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens + i, json_chunk, \"index\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_texture_view->texture = CGLTF_PTRINDEX(cgltf_texture, cgltf_json_to_int(tokens + i, json_chunk));\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"texCoord\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_texture_view->texcoord = cgltf_json_to_int(tokens + i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"scale\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_texture_view->scale = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"strength\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_texture_view->scale = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extensions\") == 0)\n\t\t{\n\t\t\t++i;\n\n\t\t\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\t\t\tint extensions_size = tokens[i].size;\n\n\t\t\t++i;\n\n\t\t\tfor (int k = 0; k < extensions_size; ++k)\n\t\t\t{\n\t\t\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\t\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"KHR_texture_transform\") == 0)\n\t\t\t\t{\n\t\t\t\t\tout_texture_view->has_transform = 1;\n\t\t\t\t\ti = cgltf_parse_json_texture_transform(tokens, i + 1, json_chunk, &out_texture_view->transform);\n\t\t\t\t}\n\t\t\t\telse\n\t\t\t\t{\n\t\t\t\t\ti = cgltf_skip_json(tokens, i + 1);\n\t\t\t\t}\n\n\t\t\t\tif (i < 0)\n\t\t\t\t{\n\t\t\t\t\treturn i;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i + 1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_pbr_metallic_roughness(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_pbr_metallic_roughness* out_pbr)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\tint size = tokens[i].size;\n\t++i;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"metallicFactor\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_pbr->metallic_factor =\n\t\t\t\tcgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"roughnessFactor\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_pbr->roughness_factor =\n\t\t\t\tcgltf_json_to_float(tokens+i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"baseColorFactor\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_pbr->base_color_factor, 4);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"baseColorTexture\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_pbr->base_color_texture);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"metallicRoughnessTexture\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_pbr->metallic_roughness_texture);\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_pbr_specular_glossiness(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_pbr_specular_glossiness* out_pbr)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\tint size = tokens[i].size;\n\t++i;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"diffuseFactor\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_pbr->diffuse_factor, 4);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"specularFactor\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_pbr->specular_factor, 3);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"glossinessFactor\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_pbr->glossiness_factor = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"diffuseTexture\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_pbr->diffuse_texture);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"specularGlossinessTexture\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_pbr->specular_glossiness_texture);\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_clearcoat(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_clearcoat* out_clearcoat)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\tint size = tokens[i].size;\n\t++i;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"clearcoatFactor\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_clearcoat->clearcoat_factor = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"clearcoatRoughnessFactor\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_clearcoat->clearcoat_roughness_factor = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"clearcoatTexture\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_clearcoat->clearcoat_texture);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"clearcoatRoughnessTexture\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_clearcoat->clearcoat_roughness_texture);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"clearcoatNormalTexture\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_clearcoat->clearcoat_normal_texture);\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_ior(jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_ior* out_ior)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\tint size = tokens[i].size;\n\t++i;\n\n\t// Default values\n\tout_ior->ior = 1.5f;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"ior\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_ior->ior = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_specular(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_specular* out_specular)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\tint size = tokens[i].size;\n\t++i;\n\n\t// Default values\n\tout_specular->specular_factor = 1.0f;\n\tcgltf_fill_float_array(out_specular->specular_color_factor, 3, 1.0f);\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"specularFactor\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_specular->specular_factor = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"specularColorFactor\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_specular->specular_color_factor, 3);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"specularTexture\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_specular->specular_texture);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"specularColorTexture\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_specular->specular_color_texture);\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_transmission(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_transmission* out_transmission)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\tint size = tokens[i].size;\n\t++i;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"transmissionFactor\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_transmission->transmission_factor = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"transmissionTexture\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_transmission->transmission_texture);\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_volume(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_volume* out_volume)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\tint size = tokens[i].size;\n\t++i;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens + i, json_chunk, \"thicknessFactor\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_volume->thickness_factor = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"thicknessTexture\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_volume->thickness_texture);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"attenuationColor\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_volume->attenuation_color, 3);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"attenuationDistance\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_volume->attenuation_distance = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i + 1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_sheen(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_sheen* out_sheen)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\tint size = tokens[i].size;\n\t++i;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"sheenColorFactor\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_sheen->sheen_color_factor, 3);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"sheenColorTexture\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_sheen->sheen_color_texture);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"sheenRoughnessFactor\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_sheen->sheen_roughness_factor = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"sheenRoughnessTexture\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_sheen->sheen_roughness_texture);\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_emissive_strength(jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_emissive_strength* out_emissive_strength)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\tint size = tokens[i].size;\n\t++i;\n\n\t// Default\n\tout_emissive_strength->emissive_strength = 1.f;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens + i, json_chunk, \"emissiveStrength\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_emissive_strength->emissive_strength = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i + 1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_iridescence(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_iridescence* out_iridescence)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\tint size = tokens[i].size;\n\t++i;\n\n\t// Default\n\tout_iridescence->iridescence_ior = 1.3f;\n\tout_iridescence->iridescence_thickness_min = 100.f;\n\tout_iridescence->iridescence_thickness_max = 400.f;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens + i, json_chunk, \"iridescenceFactor\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_iridescence->iridescence_factor = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"iridescenceTexture\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_iridescence->iridescence_texture);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"iridescenceIor\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_iridescence->iridescence_ior = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"iridescenceThicknessMinimum\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_iridescence->iridescence_thickness_min = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"iridescenceThicknessMaximum\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_iridescence->iridescence_thickness_max = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"iridescenceThicknessTexture\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_iridescence->iridescence_thickness_texture);\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i + 1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_diffuse_transmission(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_diffuse_transmission* out_diff_transmission)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\tint size = tokens[i].size;\n\t++i;\n\n\t// Defaults\n\tcgltf_fill_float_array(out_diff_transmission->diffuse_transmission_color_factor, 3, 1.0f);\n\tout_diff_transmission->diffuse_transmission_factor = 0.f;\n\t\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens + i, json_chunk, \"diffuseTransmissionFactor\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_diff_transmission->diffuse_transmission_factor = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"diffuseTransmissionTexture\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_diff_transmission->diffuse_transmission_texture);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"diffuseTransmissionColorFactor\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_diff_transmission->diffuse_transmission_color_factor, 3);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"diffuseTransmissionColorTexture\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_diff_transmission->diffuse_transmission_color_texture);\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i + 1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_anisotropy(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_anisotropy* out_anisotropy)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\tint size = tokens[i].size;\n\t++i;\n\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens + i, json_chunk, \"anisotropyStrength\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_anisotropy->anisotropy_strength = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"anisotropyRotation\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_anisotropy->anisotropy_rotation = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"anisotropyTexture\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_anisotropy->anisotropy_texture);\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i + 1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_dispersion(jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_dispersion* out_dispersion)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\tint size = tokens[i].size;\n\t++i;\n\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens + i, json_chunk, \"dispersion\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_dispersion->dispersion = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i + 1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_image(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_image* out_image)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\tint size = tokens[i].size;\n\t++i;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens + i, json_chunk, \"uri\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_image->uri);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"bufferView\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_image->buffer_view = CGLTF_PTRINDEX(cgltf_buffer_view, cgltf_json_to_int(tokens + i, json_chunk));\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"mimeType\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_image->mime_type);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"name\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_image->name);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extras\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_extras(options, tokens, i + 1, json_chunk, &out_image->extras);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extensions\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_image->extensions_count, &out_image->extensions);\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i + 1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_sampler(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_sampler* out_sampler)\n{\n\t(void)options;\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\tout_sampler->wrap_s = cgltf_wrap_mode_repeat;\n\tout_sampler->wrap_t = cgltf_wrap_mode_repeat;\n\n\tint size = tokens[i].size;\n\t++i;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens + i, json_chunk, \"name\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_sampler->name);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"magFilter\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_sampler->mag_filter\n\t\t\t\t= (cgltf_filter_type)cgltf_json_to_int(tokens + i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"minFilter\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_sampler->min_filter\n\t\t\t\t= (cgltf_filter_type)cgltf_json_to_int(tokens + i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"wrapS\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_sampler->wrap_s\n\t\t\t\t= (cgltf_wrap_mode)cgltf_json_to_int(tokens + i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"wrapT\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_sampler->wrap_t\n\t\t\t\t= (cgltf_wrap_mode)cgltf_json_to_int(tokens + i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extras\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_extras(options, tokens, i + 1, json_chunk, &out_sampler->extras);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extensions\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_sampler->extensions_count, &out_sampler->extensions);\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i + 1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_texture(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_texture* out_texture)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\tint size = tokens[i].size;\n\t++i;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"name\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_texture->name);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"sampler\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_texture->sampler = CGLTF_PTRINDEX(cgltf_sampler, cgltf_json_to_int(tokens + i, json_chunk));\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"source\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_texture->image = CGLTF_PTRINDEX(cgltf_image, cgltf_json_to_int(tokens + i, json_chunk));\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extras\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_extras(options, tokens, i + 1, json_chunk, &out_texture->extras);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extensions\") == 0)\n\t\t{\n\t\t\t++i;\n\n\t\t\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\t\t\tif (out_texture->extensions)\n\t\t\t{\n\t\t\t\treturn CGLTF_ERROR_JSON;\n\t\t\t}\n\n\t\t\tint extensions_size = tokens[i].size;\n\t\t\t++i;\n\t\t\tout_texture->extensions = (cgltf_extension*)cgltf_calloc(options, sizeof(cgltf_extension), extensions_size);\n\t\t\tout_texture->extensions_count = 0;\n\n\t\t\tif (!out_texture->extensions)\n\t\t\t{\n\t\t\t\treturn CGLTF_ERROR_NOMEM;\n\t\t\t}\n\n\t\t\tfor (int k = 0; k < extensions_size; ++k)\n\t\t\t{\n\t\t\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\t\t\tif (cgltf_json_strcmp(tokens + i, json_chunk, \"KHR_texture_basisu\") == 0)\n\t\t\t\t{\n\t\t\t\t\tout_texture->has_basisu = 1;\n\t\t\t\t\t++i;\n\t\t\t\t\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\t\t\t\t\tint num_properties = tokens[i].size;\n\t\t\t\t\t++i;\n\n\t\t\t\t\tfor (int t = 0; t < num_properties; ++t)\n\t\t\t\t\t{\n\t\t\t\t\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\t\t\t\t\tif (cgltf_json_strcmp(tokens + i, json_chunk, \"source\") == 0)\n\t\t\t\t\t\t{\n\t\t\t\t\t\t\t++i;\n\t\t\t\t\t\t\tout_texture->basisu_image = CGLTF_PTRINDEX(cgltf_image, cgltf_json_to_int(tokens + i, json_chunk));\n\t\t\t\t\t\t\t++i;\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse\n\t\t\t\t\t\t{\n\t\t\t\t\t\t\ti = cgltf_skip_json(tokens, i + 1);\n\t\t\t\t\t\t}\n\t\t\t\t\t\tif (i < 0)\n\t\t\t\t\t\t{\n\t\t\t\t\t\t\treturn i;\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"EXT_texture_webp\") == 0)\n\t\t\t\t{\n\t\t\t\t\tout_texture->has_webp = 1;\n\t\t\t\t\t++i;\n\t\t\t\t\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\t\t\t\t\tint num_properties = tokens[i].size;\n\t\t\t\t\t++i;\n\n\t\t\t\t\tfor (int t = 0; t < num_properties; ++t)\n\t\t\t\t\t{\n\t\t\t\t\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\t\t\t\t\tif (cgltf_json_strcmp(tokens + i, json_chunk, \"source\") == 0)\n\t\t\t\t\t\t{\n\t\t\t\t\t\t\t++i;\n\t\t\t\t\t\t\tout_texture->webp_image = CGLTF_PTRINDEX(cgltf_image, cgltf_json_to_int(tokens + i, json_chunk));\n\t\t\t\t\t\t\t++i;\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse\n\t\t\t\t\t\t{\n\t\t\t\t\t\t\ti = cgltf_skip_json(tokens, i + 1);\n\t\t\t\t\t\t}\n\t\t\t\t\t\tif (i < 0)\n\t\t\t\t\t\t{\n\t\t\t\t\t\t\treturn i;\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\telse\n\t\t\t\t{\n\t\t\t\t\ti = cgltf_parse_json_unprocessed_extension(options, tokens, i, json_chunk, &(out_texture->extensions[out_texture->extensions_count++]));\n\t\t\t\t}\n\n\t\t\t\tif (i < 0)\n\t\t\t\t{\n\t\t\t\t\treturn i;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i + 1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_material(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_material* out_material)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\tcgltf_fill_float_array(out_material->pbr_metallic_roughness.base_color_factor, 4, 1.0f);\n\tout_material->pbr_metallic_roughness.metallic_factor = 1.0f;\n\tout_material->pbr_metallic_roughness.roughness_factor = 1.0f;\n\n\tcgltf_fill_float_array(out_material->pbr_specular_glossiness.diffuse_factor, 4, 1.0f);\n\tcgltf_fill_float_array(out_material->pbr_specular_glossiness.specular_factor, 3, 1.0f);\n\tout_material->pbr_specular_glossiness.glossiness_factor = 1.0f;\n\n\tcgltf_fill_float_array(out_material->volume.attenuation_color, 3, 1.0f);\n\tout_material->volume.attenuation_distance = FLT_MAX;\n\n\tout_material->alpha_cutoff = 0.5f;\n\n\tint size = tokens[i].size;\n\t++i;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"name\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_material->name);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"pbrMetallicRoughness\") == 0)\n\t\t{\n\t\t\tout_material->has_pbr_metallic_roughness = 1;\n\t\t\ti = cgltf_parse_json_pbr_metallic_roughness(options, tokens, i + 1, json_chunk, &out_material->pbr_metallic_roughness);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"emissiveFactor\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_material->emissive_factor, 3);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"normalTexture\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk,\n\t\t\t\t&out_material->normal_texture);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"occlusionTexture\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk,\n\t\t\t\t&out_material->occlusion_texture);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"emissiveTexture\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk,\n\t\t\t\t&out_material->emissive_texture);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"alphaMode\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tif (cgltf_json_strcmp(tokens + i, json_chunk, \"OPAQUE\") == 0)\n\t\t\t{\n\t\t\t\tout_material->alpha_mode = cgltf_alpha_mode_opaque;\n\t\t\t}\n\t\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"MASK\") == 0)\n\t\t\t{\n\t\t\t\tout_material->alpha_mode = cgltf_alpha_mode_mask;\n\t\t\t}\n\t\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"BLEND\") == 0)\n\t\t\t{\n\t\t\t\tout_material->alpha_mode = cgltf_alpha_mode_blend;\n\t\t\t}\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"alphaCutoff\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_material->alpha_cutoff = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"doubleSided\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_material->double_sided =\n\t\t\t\tcgltf_json_to_bool(tokens + i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extras\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_extras(options, tokens, i + 1, json_chunk, &out_material->extras);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extensions\") == 0)\n\t\t{\n\t\t\t++i;\n\n\t\t\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\t\t\tif(out_material->extensions)\n\t\t\t{\n\t\t\t\treturn CGLTF_ERROR_JSON;\n\t\t\t}\n\n\t\t\tint extensions_size = tokens[i].size;\n\t\t\t++i;\n\t\t\tout_material->extensions = (cgltf_extension*)cgltf_calloc(options, sizeof(cgltf_extension), extensions_size);\n\t\t\tout_material->extensions_count= 0;\n\n\t\t\tif (!out_material->extensions)\n\t\t\t{\n\t\t\t\treturn CGLTF_ERROR_NOMEM;\n\t\t\t}\n\n\t\t\tfor (int k = 0; k < extensions_size; ++k)\n\t\t\t{\n\t\t\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\t\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"KHR_materials_pbrSpecularGlossiness\") == 0)\n\t\t\t\t{\n\t\t\t\t\tout_material->has_pbr_specular_glossiness = 1;\n\t\t\t\t\ti = cgltf_parse_json_pbr_specular_glossiness(options, tokens, i + 1, json_chunk, &out_material->pbr_specular_glossiness);\n\t\t\t\t}\n\t\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"KHR_materials_unlit\") == 0)\n\t\t\t\t{\n\t\t\t\t\tout_material->unlit = 1;\n\t\t\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t\t\t}\n\t\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"KHR_materials_clearcoat\") == 0)\n\t\t\t\t{\n\t\t\t\t\tout_material->has_clearcoat = 1;\n\t\t\t\t\ti = cgltf_parse_json_clearcoat(options, tokens, i + 1, json_chunk, &out_material->clearcoat);\n\t\t\t\t}\n\t\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"KHR_materials_ior\") == 0)\n\t\t\t\t{\n\t\t\t\t\tout_material->has_ior = 1;\n\t\t\t\t\ti = cgltf_parse_json_ior(tokens, i + 1, json_chunk, &out_material->ior);\n\t\t\t\t}\n\t\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"KHR_materials_specular\") == 0)\n\t\t\t\t{\n\t\t\t\t\tout_material->has_specular = 1;\n\t\t\t\t\ti = cgltf_parse_json_specular(options, tokens, i + 1, json_chunk, &out_material->specular);\n\t\t\t\t}\n\t\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"KHR_materials_transmission\") == 0)\n\t\t\t\t{\n\t\t\t\t\tout_material->has_transmission = 1;\n\t\t\t\t\ti = cgltf_parse_json_transmission(options, tokens, i + 1, json_chunk, &out_material->transmission);\n\t\t\t\t}\n\t\t\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"KHR_materials_volume\") == 0)\n\t\t\t\t{\n\t\t\t\t\tout_material->has_volume = 1;\n\t\t\t\t\ti = cgltf_parse_json_volume(options, tokens, i + 1, json_chunk, &out_material->volume);\n\t\t\t\t}\n\t\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"KHR_materials_sheen\") == 0)\n\t\t\t\t{\n\t\t\t\t\tout_material->has_sheen = 1;\n\t\t\t\t\ti = cgltf_parse_json_sheen(options, tokens, i + 1, json_chunk, &out_material->sheen);\n\t\t\t\t}\n\t\t\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"KHR_materials_emissive_strength\") == 0)\n\t\t\t\t{\n\t\t\t\t\tout_material->has_emissive_strength = 1;\n\t\t\t\t\ti = cgltf_parse_json_emissive_strength(tokens, i + 1, json_chunk, &out_material->emissive_strength);\n\t\t\t\t}\n\t\t\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"KHR_materials_iridescence\") == 0)\n\t\t\t\t{\n\t\t\t\t\tout_material->has_iridescence = 1;\n\t\t\t\t\ti = cgltf_parse_json_iridescence(options, tokens, i + 1, json_chunk, &out_material->iridescence);\n\t\t\t\t}\n\t\t\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"KHR_materials_diffuse_transmission\") == 0)\n\t\t\t\t{\n\t\t\t\t\tout_material->has_diffuse_transmission = 1;\n\t\t\t\t\ti = cgltf_parse_json_diffuse_transmission(options, tokens, i + 1, json_chunk, &out_material->diffuse_transmission);\n\t\t\t\t}\n\t\t\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"KHR_materials_anisotropy\") == 0)\n\t\t\t\t{\n\t\t\t\t\tout_material->has_anisotropy = 1;\n\t\t\t\t\ti = cgltf_parse_json_anisotropy(options, tokens, i + 1, json_chunk, &out_material->anisotropy);\n\t\t\t\t}\n\t\t\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"KHR_materials_dispersion\") == 0)\n\t\t\t\t{\n\t\t\t\t\tout_material->has_dispersion = 1;\n\t\t\t\t\ti = cgltf_parse_json_dispersion(tokens, i + 1, json_chunk, &out_material->dispersion);\n\t\t\t\t}\n\t\t\t\telse\n\t\t\t\t{\n\t\t\t\t\ti = cgltf_parse_json_unprocessed_extension(options, tokens, i, json_chunk, &(out_material->extensions[out_material->extensions_count++]));\n\t\t\t\t}\n\n\t\t\t\tif (i < 0)\n\t\t\t\t{\n\t\t\t\t\treturn i;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_accessors(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)\n{\n\ti = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_accessor), (void**)&out_data->accessors, &out_data->accessors_count);\n\tif (i < 0)\n\t{\n\t\treturn i;\n\t}\n\n\tfor (cgltf_size j = 0; j < out_data->accessors_count; ++j)\n\t{\n\t\ti = cgltf_parse_json_accessor(options, tokens, i, json_chunk, &out_data->accessors[j]);\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\treturn i;\n}\n\nstatic int cgltf_parse_json_materials(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)\n{\n\ti = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_material), (void**)&out_data->materials, &out_data->materials_count);\n\tif (i < 0)\n\t{\n\t\treturn i;\n\t}\n\n\tfor (cgltf_size j = 0; j < out_data->materials_count; ++j)\n\t{\n\t\ti = cgltf_parse_json_material(options, tokens, i, json_chunk, &out_data->materials[j]);\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\treturn i;\n}\n\nstatic int cgltf_parse_json_images(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)\n{\n\ti = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_image), (void**)&out_data->images, &out_data->images_count);\n\tif (i < 0)\n\t{\n\t\treturn i;\n\t}\n\n\tfor (cgltf_size j = 0; j < out_data->images_count; ++j)\n\t{\n\t\ti = cgltf_parse_json_image(options, tokens, i, json_chunk, &out_data->images[j]);\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\treturn i;\n}\n\nstatic int cgltf_parse_json_textures(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)\n{\n\ti = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_texture), (void**)&out_data->textures, &out_data->textures_count);\n\tif (i < 0)\n\t{\n\t\treturn i;\n\t}\n\n\tfor (cgltf_size j = 0; j < out_data->textures_count; ++j)\n\t{\n\t\ti = cgltf_parse_json_texture(options, tokens, i, json_chunk, &out_data->textures[j]);\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\treturn i;\n}\n\nstatic int cgltf_parse_json_samplers(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)\n{\n\ti = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_sampler), (void**)&out_data->samplers, &out_data->samplers_count);\n\tif (i < 0)\n\t{\n\t\treturn i;\n\t}\n\n\tfor (cgltf_size j = 0; j < out_data->samplers_count; ++j)\n\t{\n\t\ti = cgltf_parse_json_sampler(options, tokens, i, json_chunk, &out_data->samplers[j]);\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\treturn i;\n}\n\nstatic int cgltf_parse_json_meshopt_compression(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_meshopt_compression* out_meshopt_compression)\n{\n\t(void)options;\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\tint size = tokens[i].size;\n\t++i;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"buffer\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_meshopt_compression->buffer = CGLTF_PTRINDEX(cgltf_buffer, cgltf_json_to_int(tokens + i, json_chunk));\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"byteOffset\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_meshopt_compression->offset = cgltf_json_to_size(tokens+i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"byteLength\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_meshopt_compression->size = cgltf_json_to_size(tokens+i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"byteStride\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_meshopt_compression->stride = cgltf_json_to_size(tokens+i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"count\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_meshopt_compression->count = cgltf_json_to_size(tokens+i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"mode\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"ATTRIBUTES\") == 0)\n\t\t\t{\n\t\t\t\tout_meshopt_compression->mode = cgltf_meshopt_compression_mode_attributes;\n\t\t\t}\n\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"TRIANGLES\") == 0)\n\t\t\t{\n\t\t\t\tout_meshopt_compression->mode = cgltf_meshopt_compression_mode_triangles;\n\t\t\t}\n\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"INDICES\") == 0)\n\t\t\t{\n\t\t\t\tout_meshopt_compression->mode = cgltf_meshopt_compression_mode_indices;\n\t\t\t}\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"filter\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"NONE\") == 0)\n\t\t\t{\n\t\t\t\tout_meshopt_compression->filter = cgltf_meshopt_compression_filter_none;\n\t\t\t}\n\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"OCTAHEDRAL\") == 0)\n\t\t\t{\n\t\t\t\tout_meshopt_compression->filter = cgltf_meshopt_compression_filter_octahedral;\n\t\t\t}\n\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"QUATERNION\") == 0)\n\t\t\t{\n\t\t\t\tout_meshopt_compression->filter = cgltf_meshopt_compression_filter_quaternion;\n\t\t\t}\n\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"EXPONENTIAL\") == 0)\n\t\t\t{\n\t\t\t\tout_meshopt_compression->filter = cgltf_meshopt_compression_filter_exponential;\n\t\t\t}\n\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"COLOR\") == 0)\n\t\t\t{\n\t\t\t\tout_meshopt_compression->filter = cgltf_meshopt_compression_filter_color;\n\t\t\t}\n\t\t\t++i;\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_buffer_view(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_buffer_view* out_buffer_view)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\tint size = tokens[i].size;\n\t++i;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens + i, json_chunk, \"name\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_buffer_view->name);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"buffer\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_buffer_view->buffer = CGLTF_PTRINDEX(cgltf_buffer, cgltf_json_to_int(tokens + i, json_chunk));\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"byteOffset\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_buffer_view->offset =\n\t\t\t\t\tcgltf_json_to_size(tokens+i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"byteLength\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_buffer_view->size =\n\t\t\t\t\tcgltf_json_to_size(tokens+i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"byteStride\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_buffer_view->stride =\n\t\t\t\t\tcgltf_json_to_size(tokens+i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"target\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tint type = cgltf_json_to_int(tokens+i, json_chunk);\n\t\t\tswitch (type)\n\t\t\t{\n\t\t\tcase 34962:\n\t\t\t\ttype = cgltf_buffer_view_type_vertices;\n\t\t\t\tbreak;\n\t\t\tcase 34963:\n\t\t\t\ttype = cgltf_buffer_view_type_indices;\n\t\t\t\tbreak;\n\t\t\tdefault:\n\t\t\t\ttype = cgltf_buffer_view_type_invalid;\n\t\t\t\tbreak;\n\t\t\t}\n\t\t\tout_buffer_view->type = (cgltf_buffer_view_type)type;\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extras\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_extras(options, tokens, i + 1, json_chunk, &out_buffer_view->extras);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extensions\") == 0)\n\t\t{\n\t\t\t++i;\n\n\t\t\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\t\t\tif(out_buffer_view->extensions)\n\t\t\t{\n\t\t\t\treturn CGLTF_ERROR_JSON;\n\t\t\t}\n\n\t\t\tint extensions_size = tokens[i].size;\n\t\t\tout_buffer_view->extensions_count = 0;\n\t\t\tout_buffer_view->extensions = (cgltf_extension*)cgltf_calloc(options, sizeof(cgltf_extension), extensions_size);\n\n\t\t\tif (!out_buffer_view->extensions)\n\t\t\t{\n\t\t\t\treturn CGLTF_ERROR_NOMEM;\n\t\t\t}\n\n\t\t\t++i;\n\t\t\tfor (int k = 0; k < extensions_size; ++k)\n\t\t\t{\n\t\t\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\t\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"EXT_meshopt_compression\") == 0)\n\t\t\t\t{\n\t\t\t\t\tout_buffer_view->has_meshopt_compression = 1;\n\t\t\t\t\ti = cgltf_parse_json_meshopt_compression(options, tokens, i + 1, json_chunk, &out_buffer_view->meshopt_compression);\n\t\t\t\t}\n\t\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"KHR_meshopt_compression\") == 0)\n\t\t\t\t{\n\t\t\t\t\tout_buffer_view->has_meshopt_compression = 1;\n\t\t\t\t\tout_buffer_view->meshopt_compression.is_khr = 1;\n\t\t\t\t\ti = cgltf_parse_json_meshopt_compression(options, tokens, i + 1, json_chunk, &out_buffer_view->meshopt_compression);\n\t\t\t\t}\n\t\t\t\telse\n\t\t\t\t{\n\t\t\t\t\ti = cgltf_parse_json_unprocessed_extension(options, tokens, i, json_chunk, &(out_buffer_view->extensions[out_buffer_view->extensions_count++]));\n\t\t\t\t}\n\n\t\t\t\tif (i < 0)\n\t\t\t\t{\n\t\t\t\t\treturn i;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_buffer_views(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)\n{\n\ti = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_buffer_view), (void**)&out_data->buffer_views, &out_data->buffer_views_count);\n\tif (i < 0)\n\t{\n\t\treturn i;\n\t}\n\n\tfor (cgltf_size j = 0; j < out_data->buffer_views_count; ++j)\n\t{\n\t\ti = cgltf_parse_json_buffer_view(options, tokens, i, json_chunk, &out_data->buffer_views[j]);\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\treturn i;\n}\n\nstatic int cgltf_parse_json_buffer(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_buffer* out_buffer)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\tint size = tokens[i].size;\n\t++i;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens + i, json_chunk, \"name\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_buffer->name);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"byteLength\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_buffer->size =\n\t\t\t\t\tcgltf_json_to_size(tokens+i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"uri\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_buffer->uri);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extras\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_extras(options, tokens, i + 1, json_chunk, &out_buffer->extras);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extensions\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_buffer->extensions_count, &out_buffer->extensions);\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_buffers(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)\n{\n\ti = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_buffer), (void**)&out_data->buffers, &out_data->buffers_count);\n\tif (i < 0)\n\t{\n\t\treturn i;\n\t}\n\n\tfor (cgltf_size j = 0; j < out_data->buffers_count; ++j)\n\t{\n\t\ti = cgltf_parse_json_buffer(options, tokens, i, json_chunk, &out_data->buffers[j]);\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\treturn i;\n}\n\nstatic int cgltf_parse_json_skin(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_skin* out_skin)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\tint size = tokens[i].size;\n\t++i;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"name\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_skin->name);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"joints\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_array(options, tokens, i + 1, json_chunk, sizeof(cgltf_node*), (void**)&out_skin->joints, &out_skin->joints_count);\n\t\t\tif (i < 0)\n\t\t\t{\n\t\t\t\treturn i;\n\t\t\t}\n\n\t\t\tfor (cgltf_size k = 0; k < out_skin->joints_count; ++k)\n\t\t\t{\n\t\t\t\tout_skin->joints[k] = CGLTF_PTRINDEX(cgltf_node, cgltf_json_to_int(tokens + i, json_chunk));\n\t\t\t\t++i;\n\t\t\t}\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"skeleton\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_PRIMITIVE);\n\t\t\tout_skin->skeleton = CGLTF_PTRINDEX(cgltf_node, cgltf_json_to_int(tokens + i, json_chunk));\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"inverseBindMatrices\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_PRIMITIVE);\n\t\t\tout_skin->inverse_bind_matrices = CGLTF_PTRINDEX(cgltf_accessor, cgltf_json_to_int(tokens + i, json_chunk));\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extras\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_extras(options, tokens, i + 1, json_chunk, &out_skin->extras);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extensions\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_skin->extensions_count, &out_skin->extensions);\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_skins(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)\n{\n\ti = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_skin), (void**)&out_data->skins, &out_data->skins_count);\n\tif (i < 0)\n\t{\n\t\treturn i;\n\t}\n\n\tfor (cgltf_size j = 0; j < out_data->skins_count; ++j)\n\t{\n\t\ti = cgltf_parse_json_skin(options, tokens, i, json_chunk, &out_data->skins[j]);\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\treturn i;\n}\n\nstatic int cgltf_parse_json_camera(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_camera* out_camera)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\tint size = tokens[i].size;\n\t++i;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"name\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_camera->name);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"perspective\") == 0)\n\t\t{\n\t\t\t++i;\n\n\t\t\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\t\t\tint data_size = tokens[i].size;\n\t\t\t++i;\n\n\t\t\tif (out_camera->type != cgltf_camera_type_invalid)\n\t\t\t{\n\t\t\t\treturn CGLTF_ERROR_JSON;\n\t\t\t}\n\n\t\t\tout_camera->type = cgltf_camera_type_perspective;\n\n\t\t\tfor (int k = 0; k < data_size; ++k)\n\t\t\t{\n\t\t\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\t\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"aspectRatio\") == 0)\n\t\t\t\t{\n\t\t\t\t\t++i;\n\t\t\t\t\tout_camera->data.perspective.has_aspect_ratio = 1;\n\t\t\t\t\tout_camera->data.perspective.aspect_ratio = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t\t\t++i;\n\t\t\t\t}\n\t\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"yfov\") == 0)\n\t\t\t\t{\n\t\t\t\t\t++i;\n\t\t\t\t\tout_camera->data.perspective.yfov = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t\t\t++i;\n\t\t\t\t}\n\t\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"zfar\") == 0)\n\t\t\t\t{\n\t\t\t\t\t++i;\n\t\t\t\t\tout_camera->data.perspective.has_zfar = 1;\n\t\t\t\t\tout_camera->data.perspective.zfar = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t\t\t++i;\n\t\t\t\t}\n\t\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"znear\") == 0)\n\t\t\t\t{\n\t\t\t\t\t++i;\n\t\t\t\t\tout_camera->data.perspective.znear = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t\t\t++i;\n\t\t\t\t}\n\t\t\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extras\") == 0)\n\t\t\t\t{\n\t\t\t\t\ti = cgltf_parse_json_extras(options, tokens, i + 1, json_chunk, &out_camera->data.perspective.extras);\n\t\t\t\t}\n\t\t\t\telse\n\t\t\t\t{\n\t\t\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t\t\t}\n\n\t\t\t\tif (i < 0)\n\t\t\t\t{\n\t\t\t\t\treturn i;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"orthographic\") == 0)\n\t\t{\n\t\t\t++i;\n\n\t\t\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\t\t\tint data_size = tokens[i].size;\n\t\t\t++i;\n\n\t\t\tif (out_camera->type != cgltf_camera_type_invalid)\n\t\t\t{\n\t\t\t\treturn CGLTF_ERROR_JSON;\n\t\t\t}\n\n\t\t\tout_camera->type = cgltf_camera_type_orthographic;\n\n\t\t\tfor (int k = 0; k < data_size; ++k)\n\t\t\t{\n\t\t\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\t\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"xmag\") == 0)\n\t\t\t\t{\n\t\t\t\t\t++i;\n\t\t\t\t\tout_camera->data.orthographic.xmag = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t\t\t++i;\n\t\t\t\t}\n\t\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"ymag\") == 0)\n\t\t\t\t{\n\t\t\t\t\t++i;\n\t\t\t\t\tout_camera->data.orthographic.ymag = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t\t\t++i;\n\t\t\t\t}\n\t\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"zfar\") == 0)\n\t\t\t\t{\n\t\t\t\t\t++i;\n\t\t\t\t\tout_camera->data.orthographic.zfar = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t\t\t++i;\n\t\t\t\t}\n\t\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"znear\") == 0)\n\t\t\t\t{\n\t\t\t\t\t++i;\n\t\t\t\t\tout_camera->data.orthographic.znear = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t\t\t++i;\n\t\t\t\t}\n\t\t\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extras\") == 0)\n\t\t\t\t{\n\t\t\t\t\ti = cgltf_parse_json_extras(options, tokens, i + 1, json_chunk, &out_camera->data.orthographic.extras);\n\t\t\t\t}\n\t\t\t\telse\n\t\t\t\t{\n\t\t\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t\t\t}\n\n\t\t\t\tif (i < 0)\n\t\t\t\t{\n\t\t\t\t\treturn i;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extras\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_extras(options, tokens, i + 1, json_chunk, &out_camera->extras);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extensions\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_camera->extensions_count, &out_camera->extensions);\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_cameras(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)\n{\n\ti = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_camera), (void**)&out_data->cameras, &out_data->cameras_count);\n\tif (i < 0)\n\t{\n\t\treturn i;\n\t}\n\n\tfor (cgltf_size j = 0; j < out_data->cameras_count; ++j)\n\t{\n\t\ti = cgltf_parse_json_camera(options, tokens, i, json_chunk, &out_data->cameras[j]);\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\treturn i;\n}\n\nstatic int cgltf_parse_json_light(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_light* out_light)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\tout_light->color[0] = 1.f;\n\tout_light->color[1] = 1.f;\n\tout_light->color[2] = 1.f;\n\tout_light->intensity = 1.f;\n\n\tout_light->spot_inner_cone_angle = 0.f;\n\tout_light->spot_outer_cone_angle = 3.1415926535f / 4.0f;\n\n\tint size = tokens[i].size;\n\t++i;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"name\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_light->name);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"color\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_light->color, 3);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"intensity\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_light->intensity = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"type\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tif (cgltf_json_strcmp(tokens + i, json_chunk, \"directional\") == 0)\n\t\t\t{\n\t\t\t\tout_light->type = cgltf_light_type_directional;\n\t\t\t}\n\t\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"point\") == 0)\n\t\t\t{\n\t\t\t\tout_light->type = cgltf_light_type_point;\n\t\t\t}\n\t\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"spot\") == 0)\n\t\t\t{\n\t\t\t\tout_light->type = cgltf_light_type_spot;\n\t\t\t}\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"range\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_light->range = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"spot\") == 0)\n\t\t{\n\t\t\t++i;\n\n\t\t\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\t\t\tint data_size = tokens[i].size;\n\t\t\t++i;\n\n\t\t\tfor (int k = 0; k < data_size; ++k)\n\t\t\t{\n\t\t\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\t\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"innerConeAngle\") == 0)\n\t\t\t\t{\n\t\t\t\t\t++i;\n\t\t\t\t\tout_light->spot_inner_cone_angle = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t\t\t++i;\n\t\t\t\t}\n\t\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"outerConeAngle\") == 0)\n\t\t\t\t{\n\t\t\t\t\t++i;\n\t\t\t\t\tout_light->spot_outer_cone_angle = cgltf_json_to_float(tokens + i, json_chunk);\n\t\t\t\t\t++i;\n\t\t\t\t}\n\t\t\t\telse\n\t\t\t\t{\n\t\t\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t\t\t}\n\n\t\t\t\tif (i < 0)\n\t\t\t\t{\n\t\t\t\t\treturn i;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extras\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_extras(options, tokens, i + 1, json_chunk, &out_light->extras);\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_lights(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)\n{\n\ti = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_light), (void**)&out_data->lights, &out_data->lights_count);\n\tif (i < 0)\n\t{\n\t\treturn i;\n\t}\n\n\tfor (cgltf_size j = 0; j < out_data->lights_count; ++j)\n\t{\n\t\ti = cgltf_parse_json_light(options, tokens, i, json_chunk, &out_data->lights[j]);\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\treturn i;\n}\n\nstatic int cgltf_parse_json_node(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_node* out_node)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\tout_node->rotation[3] = 1.0f;\n\tout_node->scale[0] = 1.0f;\n\tout_node->scale[1] = 1.0f;\n\tout_node->scale[2] = 1.0f;\n\tout_node->matrix[0] = 1.0f;\n\tout_node->matrix[5] = 1.0f;\n\tout_node->matrix[10] = 1.0f;\n\tout_node->matrix[15] = 1.0f;\n\n\tint size = tokens[i].size;\n\t++i;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"name\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_node->name);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"children\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_array(options, tokens, i + 1, json_chunk, sizeof(cgltf_node*), (void**)&out_node->children, &out_node->children_count);\n\t\t\tif (i < 0)\n\t\t\t{\n\t\t\t\treturn i;\n\t\t\t}\n\n\t\t\tfor (cgltf_size k = 0; k < out_node->children_count; ++k)\n\t\t\t{\n\t\t\t\tout_node->children[k] = CGLTF_PTRINDEX(cgltf_node, cgltf_json_to_int(tokens + i, json_chunk));\n\t\t\t\t++i;\n\t\t\t}\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"mesh\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_PRIMITIVE);\n\t\t\tout_node->mesh = CGLTF_PTRINDEX(cgltf_mesh, cgltf_json_to_int(tokens + i, json_chunk));\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"skin\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_PRIMITIVE);\n\t\t\tout_node->skin = CGLTF_PTRINDEX(cgltf_skin, cgltf_json_to_int(tokens + i, json_chunk));\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"camera\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_PRIMITIVE);\n\t\t\tout_node->camera = CGLTF_PTRINDEX(cgltf_camera, cgltf_json_to_int(tokens + i, json_chunk));\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"translation\") == 0)\n\t\t{\n\t\t\tout_node->has_translation = 1;\n\t\t\ti = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_node->translation, 3);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"rotation\") == 0)\n\t\t{\n\t\t\tout_node->has_rotation = 1;\n\t\t\ti = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_node->rotation, 4);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"scale\") == 0)\n\t\t{\n\t\t\tout_node->has_scale = 1;\n\t\t\ti = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_node->scale, 3);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"matrix\") == 0)\n\t\t{\n\t\t\tout_node->has_matrix = 1;\n\t\t\ti = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_node->matrix, 16);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"weights\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_array(options, tokens, i + 1, json_chunk, sizeof(cgltf_float), (void**)&out_node->weights, &out_node->weights_count);\n\t\t\tif (i < 0)\n\t\t\t{\n\t\t\t\treturn i;\n\t\t\t}\n\n\t\t\ti = cgltf_parse_json_float_array(tokens, i - 1, json_chunk, out_node->weights, (int)out_node->weights_count);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extras\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_extras(options, tokens, i + 1, json_chunk, &out_node->extras);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extensions\") == 0)\n\t\t{\n\t\t\t++i;\n\n\t\t\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\t\t\tif(out_node->extensions)\n\t\t\t{\n\t\t\t\treturn CGLTF_ERROR_JSON;\n\t\t\t}\n\n\t\t\tint extensions_size = tokens[i].size;\n\t\t\tout_node->extensions_count= 0;\n\t\t\tout_node->extensions = (cgltf_extension*)cgltf_calloc(options, sizeof(cgltf_extension), extensions_size);\n\n\t\t\tif (!out_node->extensions)\n\t\t\t{\n\t\t\t\treturn CGLTF_ERROR_NOMEM;\n\t\t\t}\n\n\t\t\t++i;\n\n\t\t\tfor (int k = 0; k < extensions_size; ++k)\n\t\t\t{\n\t\t\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\t\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"KHR_lights_punctual\") == 0)\n\t\t\t\t{\n\t\t\t\t\t++i;\n\n\t\t\t\t\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\t\t\t\t\tint data_size = tokens[i].size;\n\t\t\t\t\t++i;\n\n\t\t\t\t\tfor (int m = 0; m < data_size; ++m)\n\t\t\t\t\t{\n\t\t\t\t\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\t\t\t\t\tif (cgltf_json_strcmp(tokens + i, json_chunk, \"light\") == 0)\n\t\t\t\t\t\t{\n\t\t\t\t\t\t\t++i;\n\t\t\t\t\t\t\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_PRIMITIVE);\n\t\t\t\t\t\t\tout_node->light = CGLTF_PTRINDEX(cgltf_light, cgltf_json_to_int(tokens + i, json_chunk));\n\t\t\t\t\t\t\t++i;\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse\n\t\t\t\t\t\t{\n\t\t\t\t\t\t\ti = cgltf_skip_json(tokens, i + 1);\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tif (i < 0)\n\t\t\t\t\t\t{\n\t\t\t\t\t\t\treturn i;\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"EXT_mesh_gpu_instancing\") == 0)\n\t\t\t\t{\n\t\t\t\t\tout_node->has_mesh_gpu_instancing = 1;\n\t\t\t\t\ti = cgltf_parse_json_mesh_gpu_instancing(options, tokens, i + 1, json_chunk, &out_node->mesh_gpu_instancing);\n\t\t\t\t}\n\t\t\t\telse\n\t\t\t\t{\n\t\t\t\t\ti = cgltf_parse_json_unprocessed_extension(options, tokens, i, json_chunk, &(out_node->extensions[out_node->extensions_count++]));\n\t\t\t\t}\n\n\t\t\t\tif (i < 0)\n\t\t\t\t{\n\t\t\t\t\treturn i;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_nodes(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)\n{\n\ti = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_node), (void**)&out_data->nodes, &out_data->nodes_count);\n\tif (i < 0)\n\t{\n\t\treturn i;\n\t}\n\n\tfor (cgltf_size j = 0; j < out_data->nodes_count; ++j)\n\t{\n\t\ti = cgltf_parse_json_node(options, tokens, i, json_chunk, &out_data->nodes[j]);\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\treturn i;\n}\n\nstatic int cgltf_parse_json_scene(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_scene* out_scene)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\tint size = tokens[i].size;\n\t++i;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"name\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_scene->name);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"nodes\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_array(options, tokens, i + 1, json_chunk, sizeof(cgltf_node*), (void**)&out_scene->nodes, &out_scene->nodes_count);\n\t\t\tif (i < 0)\n\t\t\t{\n\t\t\t\treturn i;\n\t\t\t}\n\n\t\t\tfor (cgltf_size k = 0; k < out_scene->nodes_count; ++k)\n\t\t\t{\n\t\t\t\tout_scene->nodes[k] = CGLTF_PTRINDEX(cgltf_node, cgltf_json_to_int(tokens + i, json_chunk));\n\t\t\t\t++i;\n\t\t\t}\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extras\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_extras(options, tokens, i + 1, json_chunk, &out_scene->extras);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extensions\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_scene->extensions_count, &out_scene->extensions);\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_scenes(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)\n{\n\ti = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_scene), (void**)&out_data->scenes, &out_data->scenes_count);\n\tif (i < 0)\n\t{\n\t\treturn i;\n\t}\n\n\tfor (cgltf_size j = 0; j < out_data->scenes_count; ++j)\n\t{\n\t\ti = cgltf_parse_json_scene(options, tokens, i, json_chunk, &out_data->scenes[j]);\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\treturn i;\n}\n\nstatic int cgltf_parse_json_animation_sampler(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_animation_sampler* out_sampler)\n{\n\t(void)options;\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\tint size = tokens[i].size;\n\t++i;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"input\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_sampler->input = CGLTF_PTRINDEX(cgltf_accessor, cgltf_json_to_int(tokens + i, json_chunk));\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"output\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_sampler->output = CGLTF_PTRINDEX(cgltf_accessor, cgltf_json_to_int(tokens + i, json_chunk));\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"interpolation\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tif (cgltf_json_strcmp(tokens + i, json_chunk, \"LINEAR\") == 0)\n\t\t\t{\n\t\t\t\tout_sampler->interpolation = cgltf_interpolation_type_linear;\n\t\t\t}\n\t\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"STEP\") == 0)\n\t\t\t{\n\t\t\t\tout_sampler->interpolation = cgltf_interpolation_type_step;\n\t\t\t}\n\t\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"CUBICSPLINE\") == 0)\n\t\t\t{\n\t\t\t\tout_sampler->interpolation = cgltf_interpolation_type_cubic_spline;\n\t\t\t}\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extras\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_extras(options, tokens, i + 1, json_chunk, &out_sampler->extras);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extensions\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_sampler->extensions_count, &out_sampler->extensions);\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_animation_channel(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_animation_channel* out_channel)\n{\n\t(void)options;\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\tint size = tokens[i].size;\n\t++i;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"sampler\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_channel->sampler = CGLTF_PTRINDEX(cgltf_animation_sampler, cgltf_json_to_int(tokens + i, json_chunk));\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"target\") == 0)\n\t\t{\n\t\t\t++i;\n\n\t\t\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\t\t\tint target_size = tokens[i].size;\n\t\t\t++i;\n\n\t\t\tfor (int k = 0; k < target_size; ++k)\n\t\t\t{\n\t\t\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\t\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"node\") == 0)\n\t\t\t\t{\n\t\t\t\t\t++i;\n\t\t\t\t\tout_channel->target_node = CGLTF_PTRINDEX(cgltf_node, cgltf_json_to_int(tokens + i, json_chunk));\n\t\t\t\t\t++i;\n\t\t\t\t}\n\t\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"path\") == 0)\n\t\t\t\t{\n\t\t\t\t\t++i;\n\t\t\t\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"translation\") == 0)\n\t\t\t\t\t{\n\t\t\t\t\t\tout_channel->target_path = cgltf_animation_path_type_translation;\n\t\t\t\t\t}\n\t\t\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"rotation\") == 0)\n\t\t\t\t\t{\n\t\t\t\t\t\tout_channel->target_path = cgltf_animation_path_type_rotation;\n\t\t\t\t\t}\n\t\t\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"scale\") == 0)\n\t\t\t\t\t{\n\t\t\t\t\t\tout_channel->target_path = cgltf_animation_path_type_scale;\n\t\t\t\t\t}\n\t\t\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"weights\") == 0)\n\t\t\t\t\t{\n\t\t\t\t\t\tout_channel->target_path = cgltf_animation_path_type_weights;\n\t\t\t\t\t}\n\t\t\t\t\t++i;\n\t\t\t\t}\n\t\t\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extras\") == 0)\n\t\t\t\t{\n\t\t\t\t\ti = cgltf_parse_json_extras(options, tokens, i + 1, json_chunk, &out_channel->extras);\n\t\t\t\t}\n\t\t\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extensions\") == 0)\n\t\t\t\t{\n\t\t\t\t\ti = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_channel->extensions_count, &out_channel->extensions);\n\t\t\t\t}\n\t\t\t\telse\n\t\t\t\t{\n\t\t\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t\t\t}\n\n\t\t\t\tif (i < 0)\n\t\t\t\t{\n\t\t\t\t\treturn i;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_animation(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_animation* out_animation)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\tint size = tokens[i].size;\n\t++i;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"name\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_animation->name);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"samplers\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_array(options, tokens, i + 1, json_chunk, sizeof(cgltf_animation_sampler), (void**)&out_animation->samplers, &out_animation->samplers_count);\n\t\t\tif (i < 0)\n\t\t\t{\n\t\t\t\treturn i;\n\t\t\t}\n\n\t\t\tfor (cgltf_size k = 0; k < out_animation->samplers_count; ++k)\n\t\t\t{\n\t\t\t\ti = cgltf_parse_json_animation_sampler(options, tokens, i, json_chunk, &out_animation->samplers[k]);\n\t\t\t\tif (i < 0)\n\t\t\t\t{\n\t\t\t\t\treturn i;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"channels\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_array(options, tokens, i + 1, json_chunk, sizeof(cgltf_animation_channel), (void**)&out_animation->channels, &out_animation->channels_count);\n\t\t\tif (i < 0)\n\t\t\t{\n\t\t\t\treturn i;\n\t\t\t}\n\n\t\t\tfor (cgltf_size k = 0; k < out_animation->channels_count; ++k)\n\t\t\t{\n\t\t\t\ti = cgltf_parse_json_animation_channel(options, tokens, i, json_chunk, &out_animation->channels[k]);\n\t\t\t\tif (i < 0)\n\t\t\t\t{\n\t\t\t\t\treturn i;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extras\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_extras(options, tokens, i + 1, json_chunk, &out_animation->extras);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extensions\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_animation->extensions_count, &out_animation->extensions);\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_animations(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)\n{\n\ti = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_animation), (void**)&out_data->animations, &out_data->animations_count);\n\tif (i < 0)\n\t{\n\t\treturn i;\n\t}\n\n\tfor (cgltf_size j = 0; j < out_data->animations_count; ++j)\n\t{\n\t\ti = cgltf_parse_json_animation(options, tokens, i, json_chunk, &out_data->animations[j]);\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\treturn i;\n}\n\nstatic int cgltf_parse_json_variant(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_material_variant* out_variant)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\tint size = tokens[i].size;\n\t++i;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"name\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_variant->name);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extras\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_extras(options, tokens, i + 1, json_chunk, &out_variant->extras);\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\nstatic int cgltf_parse_json_variants(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)\n{\n\ti = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_material_variant), (void**)&out_data->variants, &out_data->variants_count);\n\tif (i < 0)\n\t{\n\t\treturn i;\n\t}\n\n\tfor (cgltf_size j = 0; j < out_data->variants_count; ++j)\n\t{\n\t\ti = cgltf_parse_json_variant(options, tokens, i, json_chunk, &out_data->variants[j]);\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\treturn i;\n}\n\nstatic int cgltf_parse_json_asset(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_asset* out_asset)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\tint size = tokens[i].size;\n\t++i;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"copyright\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_asset->copyright);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"generator\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_asset->generator);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"version\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_asset->version);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"minVersion\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_asset->min_version);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extras\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_extras(options, tokens, i + 1, json_chunk, &out_asset->extras);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extensions\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_asset->extensions_count, &out_asset->extensions);\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i+1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\tif (out_asset->version && CGLTF_ATOF(out_asset->version) < 2)\n\t{\n\t\treturn CGLTF_ERROR_LEGACY;\n\t}\n\n\treturn i;\n}\n\ncgltf_size cgltf_num_components(cgltf_type type) {\n\tswitch (type)\n\t{\n\tcase cgltf_type_vec2:\n\t\treturn 2;\n\tcase cgltf_type_vec3:\n\t\treturn 3;\n\tcase cgltf_type_vec4:\n\t\treturn 4;\n\tcase cgltf_type_mat2:\n\t\treturn 4;\n\tcase cgltf_type_mat3:\n\t\treturn 9;\n\tcase cgltf_type_mat4:\n\t\treturn 16;\n\tcase cgltf_type_invalid:\n\tcase cgltf_type_scalar:\n\tdefault:\n\t\treturn 1;\n\t}\n}\n\ncgltf_size cgltf_component_size(cgltf_component_type component_type) {\n\tswitch (component_type)\n\t{\n\tcase cgltf_component_type_r_8:\n\tcase cgltf_component_type_r_8u:\n\t\treturn 1;\n\tcase cgltf_component_type_r_16:\n\tcase cgltf_component_type_r_16u:\n\t\treturn 2;\n\tcase cgltf_component_type_r_32u:\n\tcase cgltf_component_type_r_32f:\n\t\treturn 4;\n\tcase cgltf_component_type_invalid:\n\tdefault:\n\t\treturn 0;\n\t}\n}\n\ncgltf_size cgltf_calc_size(cgltf_type type, cgltf_component_type component_type)\n{\n\tcgltf_size component_size = cgltf_component_size(component_type);\n\tif (type == cgltf_type_mat2 && component_size == 1)\n\t{\n\t\treturn 8 * component_size;\n\t}\n\telse if (type == cgltf_type_mat3 && (component_size == 1 || component_size == 2))\n\t{\n\t\treturn 12 * component_size;\n\t}\n\treturn component_size * cgltf_num_components(type);\n}\n\nstatic int cgltf_fixup_pointers(cgltf_data* out_data);\n\nstatic int cgltf_parse_json_root(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)\n{\n\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\tint size = tokens[i].size;\n\t++i;\n\n\tfor (int j = 0; j < size; ++j)\n\t{\n\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\tif (cgltf_json_strcmp(tokens + i, json_chunk, \"asset\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_asset(options, tokens, i + 1, json_chunk, &out_data->asset);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"meshes\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_meshes(options, tokens, i + 1, json_chunk, out_data);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"accessors\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_accessors(options, tokens, i + 1, json_chunk, out_data);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"bufferViews\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_buffer_views(options, tokens, i + 1, json_chunk, out_data);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"buffers\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_buffers(options, tokens, i + 1, json_chunk, out_data);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"materials\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_materials(options, tokens, i + 1, json_chunk, out_data);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"images\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_images(options, tokens, i + 1, json_chunk, out_data);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"textures\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_textures(options, tokens, i + 1, json_chunk, out_data);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"samplers\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_samplers(options, tokens, i + 1, json_chunk, out_data);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"skins\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_skins(options, tokens, i + 1, json_chunk, out_data);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"cameras\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_cameras(options, tokens, i + 1, json_chunk, out_data);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"nodes\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_nodes(options, tokens, i + 1, json_chunk, out_data);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"scenes\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_scenes(options, tokens, i + 1, json_chunk, out_data);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"scene\") == 0)\n\t\t{\n\t\t\t++i;\n\t\t\tout_data->scene = CGLTF_PTRINDEX(cgltf_scene, cgltf_json_to_int(tokens + i, json_chunk));\n\t\t\t++i;\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"animations\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_animations(options, tokens, i + 1, json_chunk, out_data);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"extras\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_extras(options, tokens, i + 1, json_chunk, &out_data->extras);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extensions\") == 0)\n\t\t{\n\t\t\t++i;\n\n\t\t\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\t\t\tif(out_data->data_extensions)\n\t\t\t{\n\t\t\t\treturn CGLTF_ERROR_JSON;\n\t\t\t}\n\n\t\t\tint extensions_size = tokens[i].size;\n\t\t\tout_data->data_extensions_count = 0;\n\t\t\tout_data->data_extensions = (cgltf_extension*)cgltf_calloc(options, sizeof(cgltf_extension), extensions_size);\n\n\t\t\tif (!out_data->data_extensions)\n\t\t\t{\n\t\t\t\treturn CGLTF_ERROR_NOMEM;\n\t\t\t}\n\n\t\t\t++i;\n\n\t\t\tfor (int k = 0; k < extensions_size; ++k)\n\t\t\t{\n\t\t\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\t\t\tif (cgltf_json_strcmp(tokens+i, json_chunk, \"KHR_lights_punctual\") == 0)\n\t\t\t\t{\n\t\t\t\t\t++i;\n\n\t\t\t\t\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\t\t\t\t\tint data_size = tokens[i].size;\n\t\t\t\t\t++i;\n\n\t\t\t\t\tfor (int m = 0; m < data_size; ++m)\n\t\t\t\t\t{\n\t\t\t\t\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\t\t\t\t\tif (cgltf_json_strcmp(tokens + i, json_chunk, \"lights\") == 0)\n\t\t\t\t\t\t{\n\t\t\t\t\t\t\ti = cgltf_parse_json_lights(options, tokens, i + 1, json_chunk, out_data);\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse\n\t\t\t\t\t\t{\n\t\t\t\t\t\t\ti = cgltf_skip_json(tokens, i + 1);\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tif (i < 0)\n\t\t\t\t\t\t{\n\t\t\t\t\t\t\treturn i;\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\telse if (cgltf_json_strcmp(tokens+i, json_chunk, \"KHR_materials_variants\") == 0)\n\t\t\t\t{\n\t\t\t\t\t++i;\n\n\t\t\t\t\tCGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);\n\n\t\t\t\t\tint data_size = tokens[i].size;\n\t\t\t\t\t++i;\n\n\t\t\t\t\tfor (int m = 0; m < data_size; ++m)\n\t\t\t\t\t{\n\t\t\t\t\t\tCGLTF_CHECK_KEY(tokens[i]);\n\n\t\t\t\t\t\tif (cgltf_json_strcmp(tokens + i, json_chunk, \"variants\") == 0)\n\t\t\t\t\t\t{\n\t\t\t\t\t\t\ti = cgltf_parse_json_variants(options, tokens, i + 1, json_chunk, out_data);\n\t\t\t\t\t\t}\n\t\t\t\t\t\telse\n\t\t\t\t\t\t{\n\t\t\t\t\t\t\ti = cgltf_skip_json(tokens, i + 1);\n\t\t\t\t\t\t}\n\n\t\t\t\t\t\tif (i < 0)\n\t\t\t\t\t\t{\n\t\t\t\t\t\t\treturn i;\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\telse\n\t\t\t\t{\n\t\t\t\t\ti = cgltf_parse_json_unprocessed_extension(options, tokens, i, json_chunk, &(out_data->data_extensions[out_data->data_extensions_count++]));\n\t\t\t\t}\n\n\t\t\t\tif (i < 0)\n\t\t\t\t{\n\t\t\t\t\treturn i;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extensionsUsed\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_string_array(options, tokens, i + 1, json_chunk, &out_data->extensions_used, &out_data->extensions_used_count);\n\t\t}\n\t\telse if (cgltf_json_strcmp(tokens + i, json_chunk, \"extensionsRequired\") == 0)\n\t\t{\n\t\t\ti = cgltf_parse_json_string_array(options, tokens, i + 1, json_chunk, &out_data->extensions_required, &out_data->extensions_required_count);\n\t\t}\n\t\telse\n\t\t{\n\t\t\ti = cgltf_skip_json(tokens, i + 1);\n\t\t}\n\n\t\tif (i < 0)\n\t\t{\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn i;\n}\n\ncgltf_result cgltf_parse_json(cgltf_options* options, const uint8_t* json_chunk, cgltf_size size, cgltf_data** out_data)\n{\n\tjsmn_parser parser = { 0, 0, 0 };\n\n\tif (options->json_token_count == 0)\n\t{\n\t\tint token_count = jsmn_parse(&parser, (const char*)json_chunk, size, NULL, 0);\n\n\t\tif (token_count <= 0)\n\t\t{\n\t\t\treturn cgltf_result_invalid_json;\n\t\t}\n\n\t\toptions->json_token_count = token_count;\n\t}\n\n\tjsmntok_t* tokens = (jsmntok_t*)options->memory.alloc_func(options->memory.user_data, sizeof(jsmntok_t) * (options->json_token_count + 1));\n\n\tif (!tokens)\n\t{\n\t\treturn cgltf_result_out_of_memory;\n\t}\n\n\tjsmn_init(&parser);\n\n\tint token_count = jsmn_parse(&parser, (const char*)json_chunk, size, tokens, options->json_token_count);\n\n\tif (token_count <= 0)\n\t{\n\t\toptions->memory.free_func(options->memory.user_data, tokens);\n\t\treturn cgltf_result_invalid_json;\n\t}\n\n\t// this makes sure that we always have an UNDEFINED token at the end of the stream\n\t// for invalid JSON inputs this makes sure we don't perform out of bound reads of token data\n\ttokens[token_count].type = JSMN_UNDEFINED;\n\n\tcgltf_data* data = (cgltf_data*)options->memory.alloc_func(options->memory.user_data, sizeof(cgltf_data));\n\n\tif (!data)\n\t{\n\t\toptions->memory.free_func(options->memory.user_data, tokens);\n\t\treturn cgltf_result_out_of_memory;\n\t}\n\n\tmemset(data, 0, sizeof(cgltf_data));\n\tdata->memory = options->memory;\n\tdata->file = options->file;\n\n\tint i = cgltf_parse_json_root(options, tokens, 0, json_chunk, data);\n\n\toptions->memory.free_func(options->memory.user_data, tokens);\n\n\tif (i < 0)\n\t{\n\t\tcgltf_free(data);\n\n\t\tswitch (i)\n\t\t{\n\t\tcase CGLTF_ERROR_NOMEM: return cgltf_result_out_of_memory;\n\t\tcase CGLTF_ERROR_LEGACY: return cgltf_result_legacy_gltf;\n\t\tdefault: return cgltf_result_invalid_gltf;\n\t\t}\n\t}\n\n\tif (cgltf_fixup_pointers(data) < 0)\n\t{\n\t\tcgltf_free(data);\n\t\treturn cgltf_result_invalid_gltf;\n\t}\n\n\tdata->json = (const char*)json_chunk;\n\tdata->json_size = size;\n\n\t*out_data = data;\n\n\treturn cgltf_result_success;\n}\n\nstatic int cgltf_fixup_pointers(cgltf_data* data)\n{\n\tfor (cgltf_size i = 0; i < data->meshes_count; ++i)\n\t{\n\t\tfor (cgltf_size j = 0; j < data->meshes[i].primitives_count; ++j)\n\t\t{\n\t\t\tCGLTF_PTRFIXUP(data->meshes[i].primitives[j].indices, data->accessors, data->accessors_count);\n\t\t\tCGLTF_PTRFIXUP(data->meshes[i].primitives[j].material, data->materials, data->materials_count);\n\n\t\t\tfor (cgltf_size k = 0; k < data->meshes[i].primitives[j].attributes_count; ++k)\n\t\t\t{\n\t\t\t\tCGLTF_PTRFIXUP_REQ(data->meshes[i].primitives[j].attributes[k].data, data->accessors, data->accessors_count);\n\t\t\t}\n\n\t\t\tfor (cgltf_size k = 0; k < data->meshes[i].primitives[j].targets_count; ++k)\n\t\t\t{\n\t\t\t\tfor (cgltf_size m = 0; m < data->meshes[i].primitives[j].targets[k].attributes_count; ++m)\n\t\t\t\t{\n\t\t\t\t\tCGLTF_PTRFIXUP_REQ(data->meshes[i].primitives[j].targets[k].attributes[m].data, data->accessors, data->accessors_count);\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tif (data->meshes[i].primitives[j].has_draco_mesh_compression)\n\t\t\t{\n\t\t\t\tCGLTF_PTRFIXUP_REQ(data->meshes[i].primitives[j].draco_mesh_compression.buffer_view, data->buffer_views, data->buffer_views_count);\n\t\t\t\tfor (cgltf_size m = 0; m < data->meshes[i].primitives[j].draco_mesh_compression.attributes_count; ++m)\n\t\t\t\t{\n\t\t\t\t\tCGLTF_PTRFIXUP_REQ(data->meshes[i].primitives[j].draco_mesh_compression.attributes[m].data, data->accessors, data->accessors_count);\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tfor (cgltf_size k = 0; k < data->meshes[i].primitives[j].mappings_count; ++k)\n\t\t\t{\n\t\t\t\tCGLTF_PTRFIXUP_REQ(data->meshes[i].primitives[j].mappings[k].material, data->materials, data->materials_count);\n\t\t\t}\n\t\t}\n\t}\n\n\tfor (cgltf_size i = 0; i < data->accessors_count; ++i)\n\t{\n\t\tCGLTF_PTRFIXUP(data->accessors[i].buffer_view, data->buffer_views, data->buffer_views_count);\n\n\t\tif (data->accessors[i].is_sparse)\n\t\t{\n\t\t\tCGLTF_PTRFIXUP_REQ(data->accessors[i].sparse.indices_buffer_view, data->buffer_views, data->buffer_views_count);\n\t\t\tCGLTF_PTRFIXUP_REQ(data->accessors[i].sparse.values_buffer_view, data->buffer_views, data->buffer_views_count);\n\t\t}\n\n\t\tif (data->accessors[i].buffer_view)\n\t\t{\n\t\t\tdata->accessors[i].stride = data->accessors[i].buffer_view->stride;\n\t\t}\n\n\t\tif (data->accessors[i].stride == 0)\n\t\t{\n\t\t\tdata->accessors[i].stride = cgltf_calc_size(data->accessors[i].type, data->accessors[i].component_type);\n\t\t}\n\t}\n\n\tfor (cgltf_size i = 0; i < data->textures_count; ++i)\n\t{\n\t\tCGLTF_PTRFIXUP(data->textures[i].image, data->images, data->images_count);\n\t\tCGLTF_PTRFIXUP(data->textures[i].basisu_image, data->images, data->images_count);\n\t\tCGLTF_PTRFIXUP(data->textures[i].webp_image, data->images, data->images_count);\n\t\tCGLTF_PTRFIXUP(data->textures[i].sampler, data->samplers, data->samplers_count);\n\t}\n\n\tfor (cgltf_size i = 0; i < data->images_count; ++i)\n\t{\n\t\tCGLTF_PTRFIXUP(data->images[i].buffer_view, data->buffer_views, data->buffer_views_count);\n\t}\n\n\tfor (cgltf_size i = 0; i < data->materials_count; ++i)\n\t{\n\t\tCGLTF_PTRFIXUP(data->materials[i].normal_texture.texture, data->textures, data->textures_count);\n\t\tCGLTF_PTRFIXUP(data->materials[i].emissive_texture.texture, data->textures, data->textures_count);\n\t\tCGLTF_PTRFIXUP(data->materials[i].occlusion_texture.texture, data->textures, data->textures_count);\n\n\t\tCGLTF_PTRFIXUP(data->materials[i].pbr_metallic_roughness.base_color_texture.texture, data->textures, data->textures_count);\n\t\tCGLTF_PTRFIXUP(data->materials[i].pbr_metallic_roughness.metallic_roughness_texture.texture, data->textures, data->textures_count);\n\n\t\tCGLTF_PTRFIXUP(data->materials[i].pbr_specular_glossiness.diffuse_texture.texture, data->textures, data->textures_count);\n\t\tCGLTF_PTRFIXUP(data->materials[i].pbr_specular_glossiness.specular_glossiness_texture.texture, data->textures, data->textures_count);\n\n\t\tCGLTF_PTRFIXUP(data->materials[i].clearcoat.clearcoat_texture.texture, data->textures, data->textures_count);\n\t\tCGLTF_PTRFIXUP(data->materials[i].clearcoat.clearcoat_roughness_texture.texture, data->textures, data->textures_count);\n\t\tCGLTF_PTRFIXUP(data->materials[i].clearcoat.clearcoat_normal_texture.texture, data->textures, data->textures_count);\n\n\t\tCGLTF_PTRFIXUP(data->materials[i].specular.specular_texture.texture, data->textures, data->textures_count);\n\t\tCGLTF_PTRFIXUP(data->materials[i].specular.specular_color_texture.texture, data->textures, data->textures_count);\n\n\t\tCGLTF_PTRFIXUP(data->materials[i].transmission.transmission_texture.texture, data->textures, data->textures_count);\n\n\t\tCGLTF_PTRFIXUP(data->materials[i].volume.thickness_texture.texture, data->textures, data->textures_count);\n\n\t\tCGLTF_PTRFIXUP(data->materials[i].sheen.sheen_color_texture.texture, data->textures, data->textures_count);\n\t\tCGLTF_PTRFIXUP(data->materials[i].sheen.sheen_roughness_texture.texture, data->textures, data->textures_count);\n\n\t\tCGLTF_PTRFIXUP(data->materials[i].iridescence.iridescence_texture.texture, data->textures, data->textures_count);\n\t\tCGLTF_PTRFIXUP(data->materials[i].iridescence.iridescence_thickness_texture.texture, data->textures, data->textures_count);\n\n\t\tCGLTF_PTRFIXUP(data->materials[i].diffuse_transmission.diffuse_transmission_texture.texture, data->textures, data->textures_count);\n\t\tCGLTF_PTRFIXUP(data->materials[i].diffuse_transmission.diffuse_transmission_color_texture.texture, data->textures, data->textures_count);\n\n\t\tCGLTF_PTRFIXUP(data->materials[i].anisotropy.anisotropy_texture.texture, data->textures, data->textures_count);\n\t}\n\n\tfor (cgltf_size i = 0; i < data->buffer_views_count; ++i)\n\t{\n\t\tCGLTF_PTRFIXUP_REQ(data->buffer_views[i].buffer, data->buffers, data->buffers_count);\n\n\t\tif (data->buffer_views[i].has_meshopt_compression)\n\t\t{\n\t\t\tCGLTF_PTRFIXUP_REQ(data->buffer_views[i].meshopt_compression.buffer, data->buffers, data->buffers_count);\n\t\t}\n\t}\n\n\tfor (cgltf_size i = 0; i < data->skins_count; ++i)\n\t{\n\t\tfor (cgltf_size j = 0; j < data->skins[i].joints_count; ++j)\n\t\t{\n\t\t\tCGLTF_PTRFIXUP_REQ(data->skins[i].joints[j], data->nodes, data->nodes_count);\n\t\t}\n\n\t\tCGLTF_PTRFIXUP(data->skins[i].skeleton, data->nodes, data->nodes_count);\n\t\tCGLTF_PTRFIXUP(data->skins[i].inverse_bind_matrices, data->accessors, data->accessors_count);\n\t}\n\n\tfor (cgltf_size i = 0; i < data->nodes_count; ++i)\n\t{\n\t\tfor (cgltf_size j = 0; j < data->nodes[i].children_count; ++j)\n\t\t{\n\t\t\tCGLTF_PTRFIXUP_REQ(data->nodes[i].children[j], data->nodes, data->nodes_count);\n\n\t\t\tif (data->nodes[i].children[j]->parent)\n\t\t\t{\n\t\t\t\treturn CGLTF_ERROR_JSON;\n\t\t\t}\n\n\t\t\tdata->nodes[i].children[j]->parent = &data->nodes[i];\n\t\t}\n\n\t\tCGLTF_PTRFIXUP(data->nodes[i].mesh, data->meshes, data->meshes_count);\n\t\tCGLTF_PTRFIXUP(data->nodes[i].skin, data->skins, data->skins_count);\n\t\tCGLTF_PTRFIXUP(data->nodes[i].camera, data->cameras, data->cameras_count);\n\t\tCGLTF_PTRFIXUP(data->nodes[i].light, data->lights, data->lights_count);\n\n\t\tif (data->nodes[i].has_mesh_gpu_instancing)\n\t\t{\n\t\t\tfor (cgltf_size m = 0; m < data->nodes[i].mesh_gpu_instancing.attributes_count; ++m)\n\t\t\t{\n\t\t\t\tCGLTF_PTRFIXUP_REQ(data->nodes[i].mesh_gpu_instancing.attributes[m].data, data->accessors, data->accessors_count);\n\t\t\t}\n\t\t}\n\t}\n\n\tfor (cgltf_size i = 0; i < data->scenes_count; ++i)\n\t{\n\t\tfor (cgltf_size j = 0; j < data->scenes[i].nodes_count; ++j)\n\t\t{\n\t\t\tCGLTF_PTRFIXUP_REQ(data->scenes[i].nodes[j], data->nodes, data->nodes_count);\n\n\t\t\tif (data->scenes[i].nodes[j]->parent)\n\t\t\t{\n\t\t\t\treturn CGLTF_ERROR_JSON;\n\t\t\t}\n\t\t}\n\t}\n\n\tCGLTF_PTRFIXUP(data->scene, data->scenes, data->scenes_count);\n\n\tfor (cgltf_size i = 0; i < data->animations_count; ++i)\n\t{\n\t\tfor (cgltf_size j = 0; j < data->animations[i].samplers_count; ++j)\n\t\t{\n\t\t\tCGLTF_PTRFIXUP_REQ(data->animations[i].samplers[j].input, data->accessors, data->accessors_count);\n\t\t\tCGLTF_PTRFIXUP_REQ(data->animations[i].samplers[j].output, data->accessors, data->accessors_count);\n\t\t}\n\n\t\tfor (cgltf_size j = 0; j < data->animations[i].channels_count; ++j)\n\t\t{\n\t\t\tCGLTF_PTRFIXUP_REQ(data->animations[i].channels[j].sampler, data->animations[i].samplers, data->animations[i].samplers_count);\n\t\t\tCGLTF_PTRFIXUP(data->animations[i].channels[j].target_node, data->nodes, data->nodes_count);\n\t\t}\n\t}\n\n\treturn 0;\n}\n\n/*\n * -- jsmn.c start --\n * Source: https://github.com/zserge/jsmn\n * License: MIT\n *\n * Copyright (c) 2010 Serge A. Zaitsev\n\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to deal\n * in the Software without restriction, including without limitation the rights\n * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n * copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n * THE SOFTWARE.\n */\n\n/**\n * Allocates a fresh unused token from the token pull.\n */\nstatic jsmntok_t *jsmn_alloc_token(jsmn_parser *parser,\n\t\t\t\t jsmntok_t *tokens, size_t num_tokens) {\n\tjsmntok_t *tok;\n\tif (parser->toknext >= num_tokens) {\n\t\treturn NULL;\n\t}\n\ttok = &tokens[parser->toknext++];\n\ttok->start = tok->end = -1;\n\ttok->size = 0;\n#ifdef JSMN_PARENT_LINKS\n\ttok->parent = -1;\n#endif\n\treturn tok;\n}\n\n/**\n * Fills token type and boundaries.\n */\nstatic void jsmn_fill_token(jsmntok_t *token, jsmntype_t type,\n\t\t\t\tptrdiff_t start, ptrdiff_t end) {\n\ttoken->type = type;\n\ttoken->start = start;\n\ttoken->end = end;\n\ttoken->size = 0;\n}\n\n/**\n * Fills next available token with JSON primitive.\n */\nstatic int jsmn_parse_primitive(jsmn_parser *parser, const char *js,\n\t\t\t\tsize_t len, jsmntok_t *tokens, size_t num_tokens) {\n\tjsmntok_t *token;\n\tptrdiff_t start;\n\n\tstart = parser->pos;\n\n\tfor (; parser->pos < len && js[parser->pos] != '\\0'; parser->pos++) {\n\t\tswitch (js[parser->pos]) {\n#ifndef JSMN_STRICT\n\t\t/* In strict mode primitive must be followed by \",\" or \"}\" or \"]\" */\n\t\tcase ':':\n#endif\n\t\tcase '\\t' : case '\\r' : case '\\n' : case ' ' :\n\t\tcase ',' : case ']' : case '}' :\n\t\t\tgoto found;\n\t\t}\n\t\tif (js[parser->pos] < 32 || js[parser->pos] >= 127) {\n\t\t\tparser->pos = start;\n\t\t\treturn JSMN_ERROR_INVAL;\n\t\t}\n\t}\n#ifdef JSMN_STRICT\n\t/* In strict mode primitive must be followed by a comma/object/array */\n\tparser->pos = start;\n\treturn JSMN_ERROR_PART;\n#endif\n\nfound:\n\tif (tokens == NULL) {\n\t\tparser->pos--;\n\t\treturn 0;\n\t}\n\ttoken = jsmn_alloc_token(parser, tokens, num_tokens);\n\tif (token == NULL) {\n\t\tparser->pos = start;\n\t\treturn JSMN_ERROR_NOMEM;\n\t}\n\tjsmn_fill_token(token, JSMN_PRIMITIVE, start, parser->pos);\n#ifdef JSMN_PARENT_LINKS\n\ttoken->parent = parser->toksuper;\n#endif\n\tparser->pos--;\n\treturn 0;\n}\n\n/**\n * Fills next token with JSON string.\n */\nstatic int jsmn_parse_string(jsmn_parser *parser, const char *js,\n\t\t\t\t size_t len, jsmntok_t *tokens, size_t num_tokens) {\n\tjsmntok_t *token;\n\n\tptrdiff_t start = parser->pos;\n\n\tparser->pos++;\n\n\t/* Skip starting quote */\n\tfor (; parser->pos < len && js[parser->pos] != '\\0'; parser->pos++) {\n\t\tchar c = js[parser->pos];\n\n\t\t/* Quote: end of string */\n\t\tif (c == '\\\"') {\n\t\t\tif (tokens == NULL) {\n\t\t\t\treturn 0;\n\t\t\t}\n\t\t\ttoken = jsmn_alloc_token(parser, tokens, num_tokens);\n\t\t\tif (token == NULL) {\n\t\t\t\tparser->pos = start;\n\t\t\t\treturn JSMN_ERROR_NOMEM;\n\t\t\t}\n\t\t\tjsmn_fill_token(token, JSMN_STRING, start+1, parser->pos);\n#ifdef JSMN_PARENT_LINKS\n\t\t\ttoken->parent = parser->toksuper;\n#endif\n\t\t\treturn 0;\n\t\t}\n\n\t\t/* Backslash: Quoted symbol expected */\n\t\tif (c == '\\\\' && parser->pos + 1 < len) {\n\t\t\tint i;\n\t\t\tparser->pos++;\n\t\t\tswitch (js[parser->pos]) {\n\t\t\t/* Allowed escaped symbols */\n\t\t\tcase '\\\"': case '/' : case '\\\\' : case 'b' :\n\t\t\tcase 'f' : case 'r' : case 'n' : case 't' :\n\t\t\t\tbreak;\n\t\t\t\t/* Allows escaped symbol \\uXXXX */\n\t\t\tcase 'u':\n\t\t\t\tparser->pos++;\n\t\t\t\tfor(i = 0; i < 4 && parser->pos < len && js[parser->pos] != '\\0'; i++) {\n\t\t\t\t\t/* If it isn't a hex character we have an error */\n\t\t\t\t\tif(!((js[parser->pos] >= 48 && js[parser->pos] <= 57) || /* 0-9 */\n\t\t\t\t\t\t (js[parser->pos] >= 65 && js[parser->pos] <= 70) || /* A-F */\n\t\t\t\t\t\t (js[parser->pos] >= 97 && js[parser->pos] <= 102))) { /* a-f */\n\t\t\t\t\t\tparser->pos = start;\n\t\t\t\t\t\treturn JSMN_ERROR_INVAL;\n\t\t\t\t\t}\n\t\t\t\t\tparser->pos++;\n\t\t\t\t}\n\t\t\t\tparser->pos--;\n\t\t\t\tbreak;\n\t\t\t\t/* Unexpected symbol */\n\t\t\tdefault:\n\t\t\t\tparser->pos = start;\n\t\t\t\treturn JSMN_ERROR_INVAL;\n\t\t\t}\n\t\t}\n\t}\n\tparser->pos = start;\n\treturn JSMN_ERROR_PART;\n}\n\n/**\n * Parse JSON string and fill tokens.\n */\nstatic int jsmn_parse(jsmn_parser *parser, const char *js, size_t len,\n\t\t jsmntok_t *tokens, size_t num_tokens) {\n\tint r;\n\tint i;\n\tjsmntok_t *token;\n\tint count = parser->toknext;\n\n\tfor (; parser->pos < len && js[parser->pos] != '\\0'; parser->pos++) {\n\t\tchar c;\n\t\tjsmntype_t type;\n\n\t\tc = js[parser->pos];\n\t\tswitch (c) {\n\t\tcase '{': case '[':\n\t\t\tcount++;\n\t\t\tif (tokens == NULL) {\n\t\t\t\tbreak;\n\t\t\t}\n\t\t\ttoken = jsmn_alloc_token(parser, tokens, num_tokens);\n\t\t\tif (token == NULL)\n\t\t\t\treturn JSMN_ERROR_NOMEM;\n\t\t\tif (parser->toksuper != -1) {\n\t\t\t\ttokens[parser->toksuper].size++;\n#ifdef JSMN_PARENT_LINKS\n\t\t\t\ttoken->parent = parser->toksuper;\n#endif\n\t\t\t}\n\t\t\ttoken->type = (c == '{' ? JSMN_OBJECT : JSMN_ARRAY);\n\t\t\ttoken->start = parser->pos;\n\t\t\tparser->toksuper = parser->toknext - 1;\n\t\t\tbreak;\n\t\tcase '}': case ']':\n\t\t\tif (tokens == NULL)\n\t\t\t\tbreak;\n\t\t\ttype = (c == '}' ? JSMN_OBJECT : JSMN_ARRAY);\n#ifdef JSMN_PARENT_LINKS\n\t\t\tif (parser->toknext < 1) {\n\t\t\t\treturn JSMN_ERROR_INVAL;\n\t\t\t}\n\t\t\ttoken = &tokens[parser->toknext - 1];\n\t\t\tfor (;;) {\n\t\t\t\tif (token->start != -1 && token->end == -1) {\n\t\t\t\t\tif (token->type != type) {\n\t\t\t\t\t\treturn JSMN_ERROR_INVAL;\n\t\t\t\t\t}\n\t\t\t\t\ttoken->end = parser->pos + 1;\n\t\t\t\t\tparser->toksuper = token->parent;\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t\tif (token->parent == -1) {\n\t\t\t\t\tif(token->type != type || parser->toksuper == -1) {\n\t\t\t\t\t\treturn JSMN_ERROR_INVAL;\n\t\t\t\t\t}\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t\ttoken = &tokens[token->parent];\n\t\t\t}\n#else\n\t\t\tfor (i = parser->toknext - 1; i >= 0; i--) {\n\t\t\t\ttoken = &tokens[i];\n\t\t\t\tif (token->start != -1 && token->end == -1) {\n\t\t\t\t\tif (token->type != type) {\n\t\t\t\t\t\treturn JSMN_ERROR_INVAL;\n\t\t\t\t\t}\n\t\t\t\t\tparser->toksuper = -1;\n\t\t\t\t\ttoken->end = parser->pos + 1;\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\t\t\t/* Error if unmatched closing bracket */\n\t\t\tif (i == -1) return JSMN_ERROR_INVAL;\n\t\t\tfor (; i >= 0; i--) {\n\t\t\t\ttoken = &tokens[i];\n\t\t\t\tif (token->start != -1 && token->end == -1) {\n\t\t\t\t\tparser->toksuper = i;\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n#endif\n\t\t\tbreak;\n\t\tcase '\\\"':\n\t\t\tr = jsmn_parse_string(parser, js, len, tokens, num_tokens);\n\t\t\tif (r < 0) return r;\n\t\t\tcount++;\n\t\t\tif (parser->toksuper != -1 && tokens != NULL)\n\t\t\t\ttokens[parser->toksuper].size++;\n\t\t\tbreak;\n\t\tcase '\\t' : case '\\r' : case '\\n' : case ' ':\n\t\t\tbreak;\n\t\tcase ':':\n\t\t\tparser->toksuper = parser->toknext - 1;\n\t\t\tbreak;\n\t\tcase ',':\n\t\t\tif (tokens != NULL && parser->toksuper != -1 &&\n\t\t\t\t\ttokens[parser->toksuper].type != JSMN_ARRAY &&\n\t\t\t\t\ttokens[parser->toksuper].type != JSMN_OBJECT) {\n#ifdef JSMN_PARENT_LINKS\n\t\t\t\tparser->toksuper = tokens[parser->toksuper].parent;\n#else\n\t\t\t\tfor (i = parser->toknext - 1; i >= 0; i--) {\n\t\t\t\t\tif (tokens[i].type == JSMN_ARRAY || tokens[i].type == JSMN_OBJECT) {\n\t\t\t\t\t\tif (tokens[i].start != -1 && tokens[i].end == -1) {\n\t\t\t\t\t\t\tparser->toksuper = i;\n\t\t\t\t\t\t\tbreak;\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t}\n#endif\n\t\t\t}\n\t\t\tbreak;\n#ifdef JSMN_STRICT\n\t\t\t/* In strict mode primitives are: numbers and booleans */\n\t\tcase '-': case '0': case '1' : case '2': case '3' : case '4':\n\t\tcase '5': case '6': case '7' : case '8': case '9':\n\t\tcase 't': case 'f': case 'n' :\n\t\t\t/* And they must not be keys of the object */\n\t\t\tif (tokens != NULL && parser->toksuper != -1) {\n\t\t\t\tjsmntok_t *t = &tokens[parser->toksuper];\n\t\t\t\tif (t->type == JSMN_OBJECT ||\n\t\t\t\t\t\t(t->type == JSMN_STRING && t->size != 0)) {\n\t\t\t\t\treturn JSMN_ERROR_INVAL;\n\t\t\t\t}\n\t\t\t}\n#else\n\t\t\t/* In non-strict mode every unquoted value is a primitive */\n\t\tdefault:\n#endif\n\t\t\tr = jsmn_parse_primitive(parser, js, len, tokens, num_tokens);\n\t\t\tif (r < 0) return r;\n\t\t\tcount++;\n\t\t\tif (parser->toksuper != -1 && tokens != NULL)\n\t\t\t\ttokens[parser->toksuper].size++;\n\t\t\tbreak;\n\n#ifdef JSMN_STRICT\n\t\t\t/* Unexpected char in strict mode */\n\t\tdefault:\n\t\t\treturn JSMN_ERROR_INVAL;\n#endif\n\t\t}\n\t}\n\n\tif (tokens != NULL) {\n\t\tfor (i = parser->toknext - 1; i >= 0; i--) {\n\t\t\t/* Unmatched opened object or array */\n\t\t\tif (tokens[i].start != -1 && tokens[i].end == -1) {\n\t\t\t\treturn JSMN_ERROR_PART;\n\t\t\t}\n\t\t}\n\t}\n\n\treturn count;\n}\n\n/**\n * Creates a new parser based over a given buffer with an array of tokens\n * available.\n */\nstatic void jsmn_init(jsmn_parser *parser) {\n\tparser->pos = 0;\n\tparser->toknext = 0;\n\tparser->toksuper = -1;\n}\n/*\n * -- jsmn.c end --\n */\n\n#endif /* #ifdef CGLTF_IMPLEMENTATION */\n\n/* cgltf is distributed under MIT license:\n *\n * Copyright (c) 2018-2021 Johannes Kuhlmann\n\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to deal\n * in the Software without restriction, including without limitation the rights\n * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n * copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n\n * The above copyright notice and this permission notice shall be included in all\n * copies or substantial portions of the Software.\n\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\n * SOFTWARE.\n */\n" }, { "path": "extern/fast_obj.h", "content": "/*\n * fast_obj\n *\n * Version 1.3\n *\n * MIT License\n *\n * Copyright (c) 2018-2021 Richard Knight\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to deal\n * in the Software without restriction, including without limitation the rights\n * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n * copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in all\n * copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\n * SOFTWARE.\n *\n */\n\n#ifndef FAST_OBJ_HDR\n#define FAST_OBJ_HDR\n\n#define FAST_OBJ_VERSION_MAJOR 1\n#define FAST_OBJ_VERSION_MINOR 3\n#define FAST_OBJ_VERSION ((FAST_OBJ_VERSION_MAJOR << 8) | FAST_OBJ_VERSION_MINOR)\n\n#include \n\n\ntypedef struct\n{\n /* Texture name from .mtl file */\n char* name;\n\n /* Resolved path to texture */\n char* path;\n\n} fastObjTexture;\n\n\ntypedef struct\n{\n /* Material name */\n char* name;\n\n /* Parameters */\n float Ka[3]; /* Ambient */\n float Kd[3]; /* Diffuse */\n float Ks[3]; /* Specular */\n float Ke[3]; /* Emission */\n float Kt[3]; /* Transmittance */\n float Ns; /* Shininess */\n float Ni; /* Index of refraction */\n float Tf[3]; /* Transmission filter */\n float d; /* Disolve (alpha) */\n int illum; /* Illumination model */\n\n /* Set for materials that don't come from the associated mtllib */\n int fallback;\n\n /* Texture map indices in fastObjMesh textures array */\n unsigned int map_Ka;\n unsigned int map_Kd;\n unsigned int map_Ks;\n unsigned int map_Ke;\n unsigned int map_Kt;\n unsigned int map_Ns;\n unsigned int map_Ni;\n unsigned int map_d;\n unsigned int map_bump;\n\n} fastObjMaterial;\n\n/* Allows user override to bigger indexable array */\n#ifndef FAST_OBJ_UINT_TYPE\n#define FAST_OBJ_UINT_TYPE unsigned int\n#endif\n\ntypedef FAST_OBJ_UINT_TYPE fastObjUInt;\n\ntypedef struct\n{\n fastObjUInt p;\n fastObjUInt t;\n fastObjUInt n;\n\n} fastObjIndex;\n\n\ntypedef struct\n{\n /* Group name */\n char* name;\n\n /* Number of faces */\n unsigned int face_count;\n\n /* First face in fastObjMesh face_* arrays */\n unsigned int face_offset;\n\n /* First index in fastObjMesh indices array */\n unsigned int index_offset;\n\n} fastObjGroup;\n\n\n/* Note: a dummy zero-initialized value is added to the first index\n of the positions, texcoords, normals and textures arrays. Hence,\n valid indices into these arrays start from 1, with an index of 0\n indicating that the attribute is not present. */\ntypedef struct\n{\n /* Vertex data */\n unsigned int position_count;\n float* positions;\n\n unsigned int texcoord_count;\n float* texcoords;\n\n unsigned int normal_count;\n float* normals;\n\n unsigned int color_count;\n float* colors;\n\n /* Face data: one element for each face */\n unsigned int face_count;\n unsigned int* face_vertices;\n unsigned int* face_materials;\n unsigned char* face_lines;\n\n /* Index data: one element for each face vertex */\n unsigned int index_count;\n fastObjIndex* indices;\n\n /* Materials */\n unsigned int material_count;\n fastObjMaterial* materials;\n\n /* Texture maps */\n unsigned int texture_count;\n fastObjTexture* textures;\n\n /* Mesh objects ('o' tag in .obj file) */\n unsigned int object_count;\n fastObjGroup* objects;\n\n /* Mesh groups ('g' tag in .obj file) */\n unsigned int group_count;\n fastObjGroup* groups;\n\n} fastObjMesh;\n\ntypedef struct\n{\n void* (*file_open)(const char* path, void* user_data);\n void (*file_close)(void* file, void* user_data);\n size_t (*file_read)(void* file, void* dst, size_t bytes, void* user_data);\n unsigned long (*file_size)(void* file, void* user_data);\n} fastObjCallbacks;\n\n#ifdef __cplusplus\nextern \"C\" {\n#endif\n\nfastObjMesh* fast_obj_read(const char* path);\nfastObjMesh* fast_obj_read_with_callbacks(const char* path, const fastObjCallbacks* callbacks, void* user_data);\nvoid fast_obj_destroy(fastObjMesh* mesh);\n\n#ifdef __cplusplus\n}\n#endif\n\n#endif\n\n\n#ifdef FAST_OBJ_IMPLEMENTATION\n\n#include \n#include \n\n#ifndef FAST_OBJ_REALLOC\n#define FAST_OBJ_REALLOC realloc\n#endif\n\n#ifndef FAST_OBJ_FREE\n#define FAST_OBJ_FREE free\n#endif\n\n#ifdef _WIN32\n#define FAST_OBJ_SEPARATOR '\\\\'\n#define FAST_OBJ_OTHER_SEP '/'\n#else\n#define FAST_OBJ_SEPARATOR '/'\n#define FAST_OBJ_OTHER_SEP '\\\\'\n#endif\n\n\n/* Size of buffer to read into */\n#define BUFFER_SIZE 65536\n\n/* Max supported power when parsing float */\n#define MAX_POWER 20\n\ntypedef struct\n{\n /* Final mesh */\n fastObjMesh* mesh;\n\n /* Current object/group */\n fastObjGroup object;\n fastObjGroup group;\n\n /* Current material index */\n unsigned int material;\n\n /* Current line in file */\n unsigned int line;\n\n /* Base path for materials/textures */\n char* base;\n\n} fastObjData;\n\n\nstatic const\ndouble POWER_10_POS[MAX_POWER] =\n{\n 1.0e0, 1.0e1, 1.0e2, 1.0e3, 1.0e4, 1.0e5, 1.0e6, 1.0e7, 1.0e8, 1.0e9,\n 1.0e10, 1.0e11, 1.0e12, 1.0e13, 1.0e14, 1.0e15, 1.0e16, 1.0e17, 1.0e18, 1.0e19,\n};\n\nstatic const\ndouble POWER_10_NEG[MAX_POWER] =\n{\n 1.0e0, 1.0e-1, 1.0e-2, 1.0e-3, 1.0e-4, 1.0e-5, 1.0e-6, 1.0e-7, 1.0e-8, 1.0e-9,\n 1.0e-10, 1.0e-11, 1.0e-12, 1.0e-13, 1.0e-14, 1.0e-15, 1.0e-16, 1.0e-17, 1.0e-18, 1.0e-19,\n};\n\n\nstatic void* memory_realloc(void* ptr, size_t bytes)\n{\n return FAST_OBJ_REALLOC(ptr, bytes);\n}\n\n\nstatic\nvoid memory_dealloc(void* ptr)\n{\n FAST_OBJ_FREE(ptr);\n}\n\n\n#define array_clean(_arr) ((_arr) ? memory_dealloc(_array_header(_arr)), 0 : 0)\n#define array_push(_arr, _val) (_array_mgrow(_arr, 1) ? ((_arr)[_array_size(_arr)++] = (_val), _array_size(_arr) - 1) : 0)\n#define array_size(_arr) ((_arr) ? _array_size(_arr) : 0)\n#define array_capacity(_arr) ((_arr) ? _array_capacity(_arr) : 0)\n#define array_empty(_arr) (array_size(_arr) == 0)\n\n#define _array_header(_arr) ((fastObjUInt*)(_arr)-2)\n#define _array_size(_arr) (_array_header(_arr)[0])\n#define _array_capacity(_arr) (_array_header(_arr)[1])\n#define _array_ngrow(_arr, _n) ((_arr) == 0 || (_array_size(_arr) + (_n) >= _array_capacity(_arr)))\n#define _array_mgrow(_arr, _n) (_array_ngrow(_arr, _n) ? (_array_grow(_arr, _n) != 0) : 1)\n#define _array_grow(_arr, _n) (*((void**)&(_arr)) = array_realloc(_arr, _n, sizeof(*(_arr))))\n\n\nstatic void* array_realloc(void* ptr, fastObjUInt n, fastObjUInt b)\n{\n fastObjUInt sz = array_size(ptr);\n fastObjUInt nsz = sz + n;\n fastObjUInt cap = array_capacity(ptr);\n fastObjUInt ncap = cap + cap / 2;\n fastObjUInt* r;\n\n if (ncap < nsz)\n ncap = nsz;\n ncap = (ncap + 15) & ~15u;\n\n r = (fastObjUInt*)(memory_realloc(ptr ? _array_header(ptr) : 0, (size_t)b * ncap + 2 * sizeof(fastObjUInt)));\n if (!r)\n return 0;\n\n r[0] = sz;\n r[1] = ncap;\n\n return (r + 2);\n}\n\n\nstatic\nvoid* file_open(const char* path, void* user_data)\n{\n (void)(user_data);\n return fopen(path, \"rb\");\n}\n\n\nstatic\nvoid file_close(void* file, void* user_data)\n{\n FILE* f;\n (void)(user_data);\n \n f = (FILE*)(file);\n fclose(f);\n}\n\n\nstatic\nsize_t file_read(void* file, void* dst, size_t bytes, void* user_data)\n{\n FILE* f;\n (void)(user_data);\n \n f = (FILE*)(file);\n return fread(dst, 1, bytes, f);\n}\n\n\nstatic\nunsigned long file_size(void* file, void* user_data)\n{\n FILE* f;\n long p;\n long n;\n (void)(user_data);\n\n f = (FILE*)(file);\n\n p = ftell(f);\n fseek(f, 0, SEEK_END);\n n = ftell(f);\n fseek(f, p, SEEK_SET);\n\n if (n > 0)\n return (unsigned long)(n);\n else\n return 0;\n}\n\n\nstatic\nchar* string_copy(const char* s, const char* e)\n{\n size_t n;\n char* p;\n \n n = (size_t)(e - s);\n p = (char*)(memory_realloc(0, n + 1));\n if (p)\n {\n memcpy(p, s, n);\n p[n] = '\\0';\n }\n\n return p;\n}\n\n\nstatic\nchar* string_substr(const char* s, size_t a, size_t b)\n{\n return string_copy(s + a, s + b);\n}\n\n\nstatic\nchar* string_concat(const char* a, const char* s, const char* e)\n{\n size_t an;\n size_t sn;\n char* p;\n \n an = a ? strlen(a) : 0;\n sn = (size_t)(e - s);\n p = (char*)(memory_realloc(0, an + sn + 1));\n if (p)\n {\n if (a)\n memcpy(p, a, an);\n memcpy(p + an, s, sn);\n p[an + sn] = '\\0';\n }\n\n return p;\n}\n\n\nstatic\nint string_equal(const char* a, const char* s, const char* e)\n{\n size_t an = strlen(a);\n size_t sn = (size_t)(e - s);\n\n return an == sn && memcmp(a, s, an) == 0;\n}\n\n\nstatic\nvoid string_fix_separators(char* s)\n{\n while (*s)\n {\n if (*s == FAST_OBJ_OTHER_SEP)\n *s = FAST_OBJ_SEPARATOR;\n s++;\n }\n}\n\n\nstatic\nint is_whitespace(char c)\n{\n return (c == ' ' || c == '\\t' || c == '\\r');\n}\n\nstatic\nint is_newline(char c)\n{\n return (c == '\\n');\n}\n\n\nstatic\nint is_digit(char c)\n{\n return (c >= '0' && c <= '9');\n}\n\n\nstatic\nint is_exponent(char c)\n{\n return (c == 'e' || c == 'E');\n}\n\n\nstatic\nconst char* skip_name(const char* ptr)\n{\n const char* s = ptr;\n\n while (!is_newline(*ptr))\n ptr++;\n\n while (ptr > s && is_whitespace(*(ptr - 1)))\n ptr--;\n\n return ptr;\n}\n\n\nstatic\nconst char* skip_whitespace(const char* ptr)\n{\n while (is_whitespace(*ptr))\n ptr++;\n\n return ptr;\n}\n\n\nstatic\nconst char* skip_line(const char* ptr)\n{\n while (!is_newline(*ptr++))\n ;\n\n return ptr;\n}\n\n\nstatic\nfastObjGroup object_default(void)\n{\n fastObjGroup object;\n\n object.name = 0;\n object.face_count = 0;\n object.face_offset = 0;\n object.index_offset = 0;\n\n return object;\n}\n\n\nstatic\nvoid object_clean(fastObjGroup* object)\n{\n memory_dealloc(object->name);\n}\n\n\nstatic\nvoid flush_object(fastObjData* data)\n{\n /* Add object if not empty */\n if (data->object.face_count > 0)\n array_push(data->mesh->objects, data->object);\n else\n object_clean(&data->object);\n\n /* Reset for more data */\n data->object = object_default();\n data->object.face_offset = array_size(data->mesh->face_vertices);\n data->object.index_offset = array_size(data->mesh->indices);\n}\n\n\n\nstatic\nfastObjGroup group_default(void)\n{\n fastObjGroup group;\n\n group.name = 0;\n group.face_count = 0;\n group.face_offset = 0;\n group.index_offset = 0;\n\n return group;\n}\n\n\nstatic\nvoid group_clean(fastObjGroup* group)\n{\n memory_dealloc(group->name);\n}\n\n\nstatic\nvoid flush_group(fastObjData* data)\n{\n /* Add group if not empty */\n if (data->group.face_count > 0)\n array_push(data->mesh->groups, data->group);\n else\n group_clean(&data->group);\n\n /* Reset for more data */\n data->group = group_default();\n data->group.face_offset = array_size(data->mesh->face_vertices);\n data->group.index_offset = array_size(data->mesh->indices);\n}\n\n\nstatic\nconst char* parse_int(const char* ptr, int* val)\n{\n int sign;\n int num;\n\n\n if (*ptr == '-')\n {\n sign = -1;\n ptr++;\n }\n else\n {\n sign = +1;\n }\n\n num = 0;\n while (is_digit(*ptr))\n num = 10 * num + (*ptr++ - '0');\n\n *val = sign * num;\n\n return ptr;\n}\n\n\nstatic\nconst char* parse_float(const char* ptr, float* val)\n{\n double sign;\n double num;\n double fra;\n double div;\n unsigned int eval;\n const double* powers;\n\n\n ptr = skip_whitespace(ptr);\n\n switch (*ptr)\n {\n case '+':\n sign = 1.0;\n ptr++;\n break;\n\n case '-':\n sign = -1.0;\n ptr++;\n break;\n\n default:\n sign = 1.0;\n break;\n }\n\n\n num = 0.0;\n while (is_digit(*ptr))\n num = 10.0 * num + (double)(*ptr++ - '0');\n\n if (*ptr == '.')\n ptr++;\n\n fra = 0.0;\n div = 1.0;\n\n while (is_digit(*ptr))\n {\n fra = 10.0 * fra + (double)(*ptr++ - '0');\n div *= 10.0;\n }\n\n num += fra / div;\n\n if (is_exponent(*ptr))\n {\n ptr++;\n\n switch (*ptr)\n {\n case '+':\n powers = POWER_10_POS;\n ptr++;\n break;\n\n case '-':\n powers = POWER_10_NEG;\n ptr++;\n break;\n\n default:\n powers = POWER_10_POS;\n break;\n }\n\n eval = 0;\n while (is_digit(*ptr))\n eval = 10 * eval + (*ptr++ - '0');\n\n num *= (eval >= MAX_POWER) ? 0.0 : powers[eval];\n }\n\n *val = (float)(sign * num);\n\n return ptr;\n}\n\n\nstatic\nconst char* parse_vertex(fastObjData* data, const char* ptr)\n{\n unsigned int ii;\n float v;\n\n\n for (ii = 0; ii < 3; ii++)\n {\n ptr = parse_float(ptr, &v);\n array_push(data->mesh->positions, v);\n }\n\n\n ptr = skip_whitespace(ptr);\n if (!is_newline(*ptr))\n {\n /* Fill the colors array until it matches the size of the positions array */\n for (ii = array_size(data->mesh->colors); ii < array_size(data->mesh->positions) - 3; ++ii)\n {\n array_push(data->mesh->colors, 1.0f);\n }\n\n for (ii = 0; ii < 3; ++ii)\n {\n ptr = parse_float(ptr, &v);\n array_push(data->mesh->colors, v);\n }\n }\n\n return ptr;\n}\n\n\nstatic\nconst char* parse_texcoord(fastObjData* data, const char* ptr)\n{\n unsigned int ii;\n float v;\n\n\n for (ii = 0; ii < 2; ii++)\n {\n ptr = parse_float(ptr, &v);\n array_push(data->mesh->texcoords, v);\n }\n\n return ptr;\n}\n\n\nstatic\nconst char* parse_normal(fastObjData* data, const char* ptr)\n{\n unsigned int ii;\n float v;\n\n\n for (ii = 0; ii < 3; ii++)\n {\n ptr = parse_float(ptr, &v);\n array_push(data->mesh->normals, v);\n }\n\n return ptr;\n}\n\n\nstatic\nconst char* parse_face(fastObjData* data, const char* ptr, unsigned char line)\n{\n unsigned int count;\n fastObjIndex vn;\n int v;\n int t;\n int n;\n\n\n ptr = skip_whitespace(ptr);\n\n count = 0;\n while (!is_newline(*ptr))\n {\n v = 0;\n t = 0;\n n = 0;\n\n ptr = parse_int(ptr, &v);\n if (*ptr == '/')\n {\n ptr++;\n if (*ptr != '/')\n ptr = parse_int(ptr, &t);\n\n if (*ptr == '/')\n {\n ptr++;\n ptr = parse_int(ptr, &n);\n }\n }\n\n if (v < 0)\n vn.p = (array_size(data->mesh->positions) / 3) - (fastObjUInt)(-v);\n else if (v > 0)\n vn.p = (fastObjUInt)(v);\n else\n return ptr; /* Skip lines with no valid vertex index */\n\n if (t < 0)\n vn.t = (array_size(data->mesh->texcoords) / 2) - (fastObjUInt)(-t);\n else if (t > 0)\n vn.t = (fastObjUInt)(t);\n else\n vn.t = 0;\n\n if (n < 0)\n vn.n = (array_size(data->mesh->normals) / 3) - (fastObjUInt)(-n);\n else if (n > 0)\n vn.n = (fastObjUInt)(n);\n else\n vn.n = 0;\n\n array_push(data->mesh->indices, vn);\n count++;\n\n ptr = skip_whitespace(ptr);\n }\n\n array_push(data->mesh->face_vertices, count);\n array_push(data->mesh->face_materials, data->material);\n\n if (line || data->mesh->face_lines)\n {\n /* when line info exists, ensure it uses aligned indexing with other face data */\n size_t skipped = array_size(data->mesh->face_vertices) - array_size(data->mesh->face_lines);\n while (--skipped > 0)\n array_push(data->mesh->face_lines, 0);\n\n array_push(data->mesh->face_lines, line);\n }\n\n data->group.face_count++;\n data->object.face_count++;\n\n return ptr;\n}\n\n\nstatic\nconst char* parse_object(fastObjData* data, const char* ptr)\n{\n const char* s;\n const char* e;\n\n\n ptr = skip_whitespace(ptr);\n\n s = ptr;\n ptr = skip_name(ptr);\n e = ptr;\n\n flush_object(data);\n data->object.name = string_copy(s, e);\n\n return ptr;\n}\n\n\nstatic\nconst char* parse_group(fastObjData* data, const char* ptr)\n{\n const char* s;\n const char* e;\n\n\n ptr = skip_whitespace(ptr);\n\n s = ptr;\n ptr = skip_name(ptr);\n e = ptr;\n\n flush_group(data);\n data->group.name = string_copy(s, e);\n\n return ptr;\n}\n\n\nstatic\nfastObjTexture map_default(void)\n{\n fastObjTexture map;\n\n map.name = 0;\n map.path = 0;\n\n return map;\n}\n\n\nstatic\nfastObjMaterial mtl_default(void)\n{\n fastObjMaterial mtl;\n\n mtl.name = 0;\n\n mtl.Ka[0] = 0.0;\n mtl.Ka[1] = 0.0;\n mtl.Ka[2] = 0.0;\n mtl.Kd[0] = 1.0;\n mtl.Kd[1] = 1.0;\n mtl.Kd[2] = 1.0;\n mtl.Ks[0] = 0.0;\n mtl.Ks[1] = 0.0;\n mtl.Ks[2] = 0.0;\n mtl.Ke[0] = 0.0;\n mtl.Ke[1] = 0.0;\n mtl.Ke[2] = 0.0;\n mtl.Kt[0] = 0.0;\n mtl.Kt[1] = 0.0;\n mtl.Kt[2] = 0.0;\n mtl.Ns = 1.0;\n mtl.Ni = 1.0;\n mtl.Tf[0] = 1.0;\n mtl.Tf[1] = 1.0;\n mtl.Tf[2] = 1.0;\n mtl.d = 1.0;\n mtl.illum = 1;\n\n mtl.fallback = 0;\n\n mtl.map_Ka = 0;\n mtl.map_Kd = 0;\n mtl.map_Ks = 0;\n mtl.map_Ke = 0;\n mtl.map_Kt = 0;\n mtl.map_Ns = 0;\n mtl.map_Ni = 0;\n mtl.map_d = 0;\n mtl.map_bump = 0;\n\n return mtl;\n}\n\n\nstatic\nconst char* parse_usemtl(fastObjData* data, const char* ptr)\n{\n const char* s;\n const char* e;\n unsigned int idx;\n fastObjMaterial* mtl;\n\n\n ptr = skip_whitespace(ptr);\n\n /* Parse the material name */\n s = ptr;\n ptr = skip_name(ptr);\n e = ptr;\n\n /* Find an existing material with the same name */\n idx = 0;\n while (idx < array_size(data->mesh->materials))\n {\n mtl = &data->mesh->materials[idx];\n if (mtl->name && string_equal(mtl->name, s, e))\n break;\n\n idx++;\n }\n\n /* If doesn't exist, create a default one with this name\n Note: this case happens when OBJ doesn't have its MTL */\n if (idx == array_size(data->mesh->materials))\n {\n fastObjMaterial new_mtl = mtl_default();\n new_mtl.name = string_copy(s, e);\n new_mtl.fallback = 1;\n array_push(data->mesh->materials, new_mtl);\n }\n\n data->material = idx;\n\n return ptr;\n}\n\n\nstatic\nvoid map_clean(fastObjTexture* map)\n{\n memory_dealloc(map->name);\n memory_dealloc(map->path);\n}\n\n\nstatic\nvoid mtl_clean(fastObjMaterial* mtl)\n{\n memory_dealloc(mtl->name);\n}\n\n\nstatic\nconst char* read_mtl_int(const char* p, int* v)\n{\n return parse_int(p, v);\n}\n\n\nstatic\nconst char* read_mtl_single(const char* p, float* v)\n{\n return parse_float(p, v);\n}\n\n\nstatic\nconst char* read_mtl_triple(const char* p, float v[3])\n{\n p = read_mtl_single(p, &v[0]);\n p = read_mtl_single(p, &v[1]);\n p = read_mtl_single(p, &v[2]);\n\n return p;\n}\n\n\nstatic\nconst char* read_map(fastObjData* data, const char* ptr, unsigned int* idx)\n{\n const char* s;\n const char* e;\n fastObjTexture* map;\n\n\n ptr = skip_whitespace(ptr);\n\n /* Don't support options at present */\n if (*ptr == '-')\n return ptr;\n\n\n /* Read name */\n s = ptr;\n ptr = skip_name(ptr);\n e = ptr;\n\n /* Try to find an existing texture map with the same name */\n *idx = 1; /* skip dummy at index 0 */\n while (*idx < array_size(data->mesh->textures))\n {\n map = &data->mesh->textures[*idx];\n if (map->name && string_equal(map->name, s, e))\n break;\n\n (*idx)++;\n }\n\n /* Add it to the texture array if it didn't already exist */\n if (*idx == array_size(data->mesh->textures))\n {\n fastObjTexture new_map = map_default();\n new_map.name = string_copy(s, e);\n new_map.path = string_concat(data->base, s, e);\n string_fix_separators(new_map.path);\n array_push(data->mesh->textures, new_map);\n }\n\n return e;\n}\n\n\nstatic\nint read_mtllib(fastObjData* data, void* file, const fastObjCallbacks* callbacks, void* user_data)\n{\n unsigned long n;\n const char* s;\n char* contents;\n size_t l;\n const char* p;\n const char* e;\n int found_d;\n fastObjMaterial mtl;\n\n\n /* Read entire file */\n n = callbacks->file_size(file, user_data);\n\n contents = (char*)(memory_realloc(0, n + 1));\n if (!contents)\n return 0;\n\n l = callbacks->file_read(file, contents, n, user_data);\n contents[l] = '\\n';\n\n mtl = mtl_default();\n\n found_d = 0;\n\n p = contents;\n e = contents + l;\n while (p < e)\n {\n p = skip_whitespace(p);\n\n switch (*p)\n {\n case 'n':\n p++;\n if (p[0] == 'e' &&\n p[1] == 'w' &&\n p[2] == 'm' &&\n p[3] == 't' &&\n p[4] == 'l' &&\n is_whitespace(p[5]))\n {\n /* Push previous material (if there is one) */\n if (mtl.name)\n {\n array_push(data->mesh->materials, mtl);\n mtl = mtl_default();\n }\n\n\n /* Read name */\n p += 5;\n\n while (is_whitespace(*p))\n p++;\n\n s = p;\n p = skip_name(p);\n\n mtl.name = string_copy(s, p);\n }\n break;\n\n case 'K':\n if (p[1] == 'a')\n p = read_mtl_triple(p + 2, mtl.Ka);\n else if (p[1] == 'd')\n p = read_mtl_triple(p + 2, mtl.Kd);\n else if (p[1] == 's')\n p = read_mtl_triple(p + 2, mtl.Ks);\n else if (p[1] == 'e')\n p = read_mtl_triple(p + 2, mtl.Ke);\n else if (p[1] == 't')\n p = read_mtl_triple(p + 2, mtl.Kt);\n break;\n\n case 'N':\n if (p[1] == 's')\n p = read_mtl_single(p + 2, &mtl.Ns);\n else if (p[1] == 'i')\n p = read_mtl_single(p + 2, &mtl.Ni);\n break;\n\n case 'T':\n if (p[1] == 'r')\n {\n float Tr;\n p = read_mtl_single(p + 2, &Tr);\n if (!found_d)\n {\n /* Ignore Tr if we've already read d */\n mtl.d = 1.0f - Tr;\n }\n }\n else if (p[1] == 'f')\n p = read_mtl_triple(p + 2, mtl.Tf);\n break;\n\n case 'd':\n if (is_whitespace(p[1]))\n {\n p = read_mtl_single(p + 1, &mtl.d);\n found_d = 1;\n }\n break;\n\n case 'i':\n p++;\n if (p[0] == 'l' &&\n p[1] == 'l' &&\n p[2] == 'u' &&\n p[3] == 'm' &&\n is_whitespace(p[4]))\n {\n p = read_mtl_int(p + 4, &mtl.illum);\n }\n break;\n\n case 'm':\n p++;\n if (p[0] == 'a' &&\n p[1] == 'p' &&\n p[2] == '_')\n {\n p += 3;\n if (*p == 'K')\n {\n p++;\n if (is_whitespace(p[1]))\n {\n if (*p == 'a')\n p = read_map(data, p + 1, &mtl.map_Ka);\n else if (*p == 'd')\n p = read_map(data, p + 1, &mtl.map_Kd);\n else if (*p == 's')\n p = read_map(data, p + 1, &mtl.map_Ks);\n else if (*p == 'e')\n p = read_map(data, p + 1, &mtl.map_Ke);\n else if (*p == 't')\n p = read_map(data, p + 1, &mtl.map_Kt);\n }\n }\n else if (*p == 'N')\n {\n p++;\n if (is_whitespace(p[1]))\n {\n if (*p == 's')\n p = read_map(data, p + 1, &mtl.map_Ns);\n else if (*p == 'i')\n p = read_map(data, p + 1, &mtl.map_Ni);\n }\n }\n else if (*p == 'd')\n {\n p++;\n if (is_whitespace(*p))\n p = read_map(data, p, &mtl.map_d);\n }\n else if ((p[0] == 'b' || p[0] == 'B') &&\n p[1] == 'u' &&\n p[2] == 'm' &&\n p[3] == 'p' &&\n is_whitespace(p[4]))\n {\n p = read_map(data, p + 4, &mtl.map_bump);\n }\n }\n break;\n\n case '#':\n break;\n }\n\n p = skip_line(p);\n }\n\n /* Push final material */\n if (mtl.name)\n array_push(data->mesh->materials, mtl);\n\n memory_dealloc(contents);\n\n return 1;\n}\n\n\nstatic\nconst char* parse_mtllib(fastObjData* data, const char* ptr, const fastObjCallbacks* callbacks, void* user_data)\n{\n const char* s;\n const char* e;\n char* lib;\n void* file;\n\n\n ptr = skip_whitespace(ptr);\n\n s = ptr;\n ptr = skip_name(ptr);\n e = ptr;\n\n lib = string_concat(data->base, s, e);\n if (lib)\n {\n string_fix_separators(lib);\n\n file = callbacks->file_open(lib, user_data);\n if (file)\n {\n read_mtllib(data, file, callbacks, user_data);\n callbacks->file_close(file, user_data);\n }\n\n memory_dealloc(lib);\n }\n\n return ptr;\n}\n\n\nstatic\nvoid parse_buffer(fastObjData* data, const char* ptr, const char* end, const fastObjCallbacks* callbacks, void* user_data)\n{\n const char* p;\n \n \n p = ptr;\n while (p != end)\n {\n p = skip_whitespace(p);\n\n switch (*p)\n {\n case 'v':\n p++;\n\n switch (*p++)\n {\n case ' ':\n case '\\t':\n p = parse_vertex(data, p);\n break;\n\n case 't':\n p = parse_texcoord(data, p);\n break;\n\n case 'n':\n p = parse_normal(data, p);\n break;\n\n default:\n p--; /* roll p++ back in case *p was a newline */\n }\n break;\n\n case 'f':\n p++;\n\n switch (*p++)\n {\n case ' ':\n case '\\t':\n p = parse_face(data, p, 0);\n break;\n\n default:\n p--; /* roll p++ back in case *p was a newline */\n }\n break;\n\n case 'l':\n p++;\n\n switch (*p++)\n {\n case ' ':\n case '\\t':\n p = parse_face(data, p, 1);\n break;\n\n default:\n p--; /* roll p++ back in case *p was a newline */\n }\n break;\n\n case 'o':\n p++;\n\n switch (*p++)\n {\n case ' ':\n case '\\t':\n p = parse_object(data, p);\n break;\n\n default:\n p--; /* roll p++ back in case *p was a newline */\n }\n break;\n\n case 'g':\n p++;\n\n switch (*p++)\n {\n case ' ':\n case '\\t':\n p = parse_group(data, p);\n break;\n\n default:\n p--; /* roll p++ back in case *p was a newline */\n }\n break;\n\n case 'm':\n p++;\n if (p[0] == 't' &&\n p[1] == 'l' &&\n p[2] == 'l' &&\n p[3] == 'i' &&\n p[4] == 'b' &&\n is_whitespace(p[5]))\n p = parse_mtllib(data, p + 5, callbacks, user_data);\n break;\n\n case 'u':\n p++;\n if (p[0] == 's' &&\n p[1] == 'e' &&\n p[2] == 'm' &&\n p[3] == 't' &&\n p[4] == 'l' &&\n is_whitespace(p[5]))\n p = parse_usemtl(data, p + 5);\n break;\n\n case '#':\n break;\n }\n\n p = skip_line(p);\n\n data->line++;\n }\n if (array_size(data->mesh->colors) > 0)\n {\n /* Fill the remaining slots in the colors array */\n unsigned int ii;\n for (ii = array_size(data->mesh->colors); ii < array_size(data->mesh->positions); ++ii)\n {\n array_push(data->mesh->colors, 1.0f);\n }\n }\n}\n\n\nvoid fast_obj_destroy(fastObjMesh* m)\n{\n unsigned int ii;\n\n\n for (ii = 0; ii < array_size(m->objects); ii++)\n object_clean(&m->objects[ii]);\n\n for (ii = 0; ii < array_size(m->groups); ii++)\n group_clean(&m->groups[ii]);\n\n for (ii = 0; ii < array_size(m->materials); ii++)\n mtl_clean(&m->materials[ii]);\n\n for (ii = 0; ii < array_size(m->textures); ii++)\n map_clean(&m->textures[ii]);\n\n array_clean(m->positions);\n array_clean(m->texcoords);\n array_clean(m->normals);\n array_clean(m->colors);\n array_clean(m->face_vertices);\n array_clean(m->face_materials);\n array_clean(m->face_lines);\n array_clean(m->indices);\n array_clean(m->objects);\n array_clean(m->groups);\n array_clean(m->materials);\n array_clean(m->textures);\n\n memory_dealloc(m);\n}\n\n\nfastObjMesh* fast_obj_read(const char* path)\n{\n fastObjCallbacks callbacks;\n callbacks.file_open = file_open;\n callbacks.file_close = file_close;\n callbacks.file_read = file_read;\n callbacks.file_size = file_size;\n\n return fast_obj_read_with_callbacks(path, &callbacks, 0);\n}\n\n\nfastObjMesh* fast_obj_read_with_callbacks(const char* path, const fastObjCallbacks* callbacks, void* user_data)\n{\n fastObjData data;\n fastObjMesh* m;\n void* file;\n char* buffer;\n char* start;\n char* end;\n char* last;\n fastObjUInt read;\n fastObjUInt bytes;\n\n /* Check if callbacks are valid */\n if(!callbacks)\n return 0;\n\n\n /* Open file */\n file = callbacks->file_open(path, user_data);\n if (!file)\n return 0;\n\n\n /* Empty mesh */\n m = (fastObjMesh*)(memory_realloc(0, sizeof(fastObjMesh)));\n if (!m)\n return 0;\n\n m->positions = 0;\n m->texcoords = 0;\n m->normals = 0;\n m->colors = 0;\n m->face_vertices = 0;\n m->face_materials = 0;\n m->face_lines = 0;\n m->indices = 0;\n m->materials = 0;\n m->textures = 0;\n m->objects = 0;\n m->groups = 0;\n\n\n /* Add dummy position/texcoord/normal/texture */\n array_push(m->positions, 0.0f);\n array_push(m->positions, 0.0f);\n array_push(m->positions, 0.0f);\n\n array_push(m->texcoords, 0.0f);\n array_push(m->texcoords, 0.0f);\n\n array_push(m->normals, 0.0f);\n array_push(m->normals, 0.0f);\n array_push(m->normals, 1.0f);\n\n array_push(m->textures, map_default());\n\n\n /* Data needed during parsing */\n data.mesh = m;\n data.object = object_default();\n data.group = group_default();\n data.material = 0;\n data.line = 1;\n data.base = 0;\n\n\n /* Find base path for materials/textures */\n {\n const char* sep1 = strrchr(path, FAST_OBJ_SEPARATOR);\n const char* sep2 = strrchr(path, FAST_OBJ_OTHER_SEP);\n\n /* Use the last separator in the path */\n const char* sep = sep2 && (!sep1 || sep1 < sep2) ? sep2 : sep1;\n\n if (sep)\n data.base = string_substr(path, 0, sep - path + 1);\n }\n\n\n /* Create buffer for reading file */\n buffer = (char*)(memory_realloc(0, 2 * BUFFER_SIZE * sizeof(char)));\n if (!buffer)\n return 0;\n\n start = buffer;\n for (;;)\n {\n /* Read another buffer's worth from file */\n read = (fastObjUInt)(callbacks->file_read(file, start, BUFFER_SIZE, user_data));\n if (read == 0 && start == buffer)\n break;\n\n\n /* Ensure buffer ends in a newline */\n if (read < BUFFER_SIZE)\n {\n if (read == 0 || start[read - 1] != '\\n')\n start[read++] = '\\n';\n }\n\n end = start + read;\n if (end == buffer)\n break;\n\n\n /* Find last new line */\n last = end;\n while (last > buffer)\n {\n last--;\n if (*last == '\\n')\n break;\n }\n\n\n /* Check there actually is a new line */\n if (*last != '\\n')\n break;\n\n last++;\n\n\n /* Process buffer */\n parse_buffer(&data, buffer, last, callbacks, user_data);\n\n\n /* Copy overflow for next buffer */\n bytes = (fastObjUInt)(end - last);\n memmove(buffer, last, bytes);\n start = buffer + bytes;\n }\n\n\n /* Flush final object/group */\n flush_object(&data);\n object_clean(&data.object);\n\n flush_group(&data);\n group_clean(&data.group);\n\n m->position_count = array_size(m->positions) / 3;\n m->texcoord_count = array_size(m->texcoords) / 2;\n m->normal_count = array_size(m->normals) / 3;\n m->color_count = array_size(m->colors) / 3;\n m->face_count = array_size(m->face_vertices);\n m->index_count = array_size(m->indices);\n m->material_count = array_size(m->materials);\n m->texture_count = array_size(m->textures);\n m->object_count = array_size(m->objects);\n m->group_count = array_size(m->groups);\n\n\n /* Clean up */\n memory_dealloc(buffer);\n memory_dealloc(data.base);\n\n callbacks->file_close(file, user_data);\n\n return m;\n}\n\n#endif" }, { "path": "extern/sdefl.h", "content": "/*# Small Deflate\n`sdefl` is a small bare bone lossless compression library in ANSI C (ISO C90)\nwhich implements the Deflate (RFC 1951) compressed data format specification standard.\nIt is mainly tuned to get as much speed and compression ratio from as little code\nas needed to keep the implementation as concise as possible.\n\n## Features\n- Portable single header and source file duo written in ANSI C (ISO C90)\n- Dual license with either MIT or public domain\n- Small implementation\n - Deflate: 525 LoC\n - Inflate: 320 LoC\n- Webassembly:\n - Deflate ~3.7 KB (~2.2KB compressed)\n - Inflate ~3.6 KB (~2.2KB compressed)\n\n## Usage:\nThis file behaves differently depending on what symbols you define\nbefore including it.\n\nHeader-File mode:\nIf you do not define `SDEFL_IMPLEMENTATION` before including this file, it\nwill operate in header only mode. In this mode it declares all used structs\nand the API of the library without including the implementation of the library.\n\nImplementation mode:\nIf you define `SDEFL_IMPLEMENTATION` before including this file, it will\ncompile the implementation . Make sure that you only include\nthis file implementation in *one* C or C++ file to prevent collisions.\n\n### Benchmark\n\n| Compressor name | Compression| Decompress.| Compr. size | Ratio |\n| ------------------------| -----------| -----------| ----------- | ----- |\n| miniz 1.0 -1 | 122 MB/s | 208 MB/s | 48510028 | 48.51 |\n| miniz 1.0 -6 | 27 MB/s | 260 MB/s | 36513697 | 36.51 |\n| miniz 1.0 -9 | 23 MB/s | 261 MB/s | 36460101 | 36.46 |\n| zlib 1.2.11 -1 | 72 MB/s | 307 MB/s | 42298774 | 42.30 |\n| zlib 1.2.11 -6 | 24 MB/s | 313 MB/s | 36548921 | 36.55 |\n| zlib 1.2.11 -9 | 20 MB/s | 314 MB/s | 36475792 | 36.48 |\n| sdefl 1.0 -0 | 127 MB/s | 355 MB/s | 40004116 | 39.88 |\n| sdefl 1.0 -1 | 111 MB/s | 413 MB/s | 38940674 | 38.82 |\n| sdefl 1.0 -5 | 45 MB/s | 436 MB/s | 36577183 | 36.46 |\n| sdefl 1.0 -7 | 38 MB/s | 432 MB/s | 36523781 | 36.41 |\n| libdeflate 1.3 -1 | 147 MB/s | 667 MB/s | 39597378 | 39.60 |\n| libdeflate 1.3 -6 | 69 MB/s | 689 MB/s | 36648318 | 36.65 |\n| libdeflate 1.3 -9 | 13 MB/s | 672 MB/s | 35197141 | 35.20 |\n| libdeflate 1.3 -12 | 8.13 MB/s | 670 MB/s | 35100568 | 35.10 |\n\n### Compression\nResults on the [Silesia compression corpus](http://sun.aei.polsl.pl/~sdeor/index.php?page=silesia):\n\n| File | Original | `sdefl 0` | `sdefl 5` | `sdefl 7` |\n| --------| -----------| -------------| ---------- | ------------|\n| dickens | 10.192.446 | 4,260,187 | 3,845,261 | 3,833,657 |\n| mozilla | 51.220.480 | 20,774,706 | 19,607,009 | 19,565,867 |\n| mr | 9.970.564 | 3,860,531 | 3,673,460 | 3,665,627 |\n| nci | 33.553.445 | 4,030,283 | 3,094,526 | 3,006,075 |\n| ooffice | 6.152.192 | 3,320,063 | 3,186,373 | 3,183,815 |\n| osdb | 10.085.684 | 3,919,646 | 3,649,510 | 3,649,477 |\n| reymont | 6.627.202 | 2,263,378 | 1,857,588 | 1,827,237 |\n| samba | 21.606.400 | 6,121,797 | 5,462,670 | 5,450,762 |\n| sao | 7.251.944 | 5,612,421 | 5,485,380 | 5,481,765 |\n| webster | 41.458.703 | 13,972,648 | 12,059,432 | 11,991,421 |\n| xml | 5.345.280 | 886,620 | 674,009 | 662,141 |\n| x-ray | 8.474.240 | 6,304,655 | 6,244,779 | 6,244,779 |\n\n## License\n```\n------------------------------------------------------------------------------\nThis software is available under 2 licenses -- choose whichever you prefer.\n------------------------------------------------------------------------------\nALTERNATIVE A - MIT License\nCopyright (c) 2020-2023 Micha Mettke\nPermission is hereby granted, free of charge, to any person obtaining a copy of\nthis software and associated documentation files (the \"Software\"), to deal in\nthe Software without restriction, including without limitation the rights to\nuse, copy, modify, merge, publish, distribute, sublicense, and/or sell copies\nof the Software, and to permit persons to whom the Software is furnished to do\nso, subject to the following conditions:\nThe above copyright notice and this permission notice shall be included in all\ncopies or substantial portions of the Software.\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\nSOFTWARE.\n------------------------------------------------------------------------------\nALTERNATIVE B - Public Domain (www.unlicense.org)\nThis is free and unencumbered software released into the public domain.\nAnyone is free to copy, modify, publish, use, compile, sell, or distribute this\nsoftware, either in source code form or as a compiled binary, for any purpose,\ncommercial or non-commercial, and by any means.\nIn jurisdictions that recognize copyright laws, the author or authors of this\nsoftware dedicate any and all copyright interest in the software to the public\ndomain. We make this dedication for the benefit of the public at large and to\nthe detriment of our heirs and successors. We intend this dedication to be an\novert act of relinquishment in perpetuity of all present and future rights to\nthis software under copyright law.\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN\nACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION\nWITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\n------------------------------------------------------------------------------\n```\n*/\n#ifndef SDEFL_H_INCLUDED\n#define SDEFL_H_INCLUDED\n\n#ifdef __cplusplus\nextern \"C\" {\n#endif\n\n#define SDEFL_MAX_OFF (1 << 15)\n#define SDEFL_WIN_SIZ SDEFL_MAX_OFF\n#define SDEFL_WIN_MSK (SDEFL_WIN_SIZ-1)\n\n#define SDEFL_HASH_BITS 15\n#define SDEFL_HASH_SIZ (1 << SDEFL_HASH_BITS)\n#define SDEFL_HASH_MSK (SDEFL_HASH_SIZ-1)\n\n#define SDEFL_MIN_MATCH 4\n#define SDEFL_BLK_MAX (256*1024)\n#define SDEFL_SEQ_SIZ ((SDEFL_BLK_MAX+2)/3)\n\n#define SDEFL_SYM_MAX (288)\n#define SDEFL_OFF_MAX (32)\n#define SDEFL_PRE_MAX (19)\n\n#define SDEFL_LVL_MIN 0\n#define SDEFL_LVL_DEF 5\n#define SDEFL_LVL_MAX 8\n\nstruct sdefl_freq {\n unsigned lit[SDEFL_SYM_MAX];\n unsigned off[SDEFL_OFF_MAX];\n};\nstruct sdefl_code_words {\n unsigned lit[SDEFL_SYM_MAX];\n unsigned off[SDEFL_OFF_MAX];\n};\nstruct sdefl_lens {\n unsigned char lit[SDEFL_SYM_MAX];\n unsigned char off[SDEFL_OFF_MAX];\n};\nstruct sdefl_codes {\n struct sdefl_code_words word;\n struct sdefl_lens len;\n};\nstruct sdefl_seqt {\n int off, len;\n};\nstruct sdefl {\n int bits, bitcnt;\n int tbl[SDEFL_HASH_SIZ];\n int prv[SDEFL_WIN_SIZ];\n\n int seq_cnt;\n struct sdefl_seqt seq[SDEFL_SEQ_SIZ];\n struct sdefl_freq freq;\n struct sdefl_codes cod;\n};\nextern int sdefl_bound(int in_len);\nextern int sdeflate(struct sdefl *s, void *o, const void *i, int n, int lvl);\nextern int zsdeflate(struct sdefl *s, void *o, const void *i, int n, int lvl);\n\n#ifdef __cplusplus\n}\n#endif\n\n#endif /* SDEFL_H_INCLUDED */\n\n#ifdef SDEFL_IMPLEMENTATION\n\n#include /* assert */\n#include /* memcpy */\n#include /* CHAR_BIT */\n\n#ifdef __cplusplus\nextern \"C\" {\n#endif\n\n#define SDEFL_NIL (-1)\n#define SDEFL_MAX_MATCH 258\n#define SDEFL_MAX_CODE_LEN (15)\n#define SDEFL_SYM_BITS (10u)\n#define SDEFL_SYM_MSK ((1u << SDEFL_SYM_BITS)-1u)\n#define SDEFL_RAW_BLK_SIZE (65535)\n#define SDEFL_LIT_LEN_CODES (14)\n#define SDEFL_OFF_CODES (15)\n#define SDEFL_PRE_CODES (7)\n#define SDEFL_CNT_NUM(n) ((((n)+3u/4u)+3u)&~3u)\n#define SDEFL_EOB (256)\n\n#define sdefl_npow2(n) (1 << (sdefl_ilog2((n)-1) + 1))\n#define sdefl_div_round_up(n,d) (((n)+((d)-1))/(d))\n\nstatic int\nsdefl_ilog2(int n) {\n if (!n) return 0;\n#ifdef _MSC_VER\n unsigned long msbp = 0;\n _BitScanReverse(&msbp, (unsigned long)n);\n return (int)msbp;\n#elif defined(__GNUC__) || defined(__clang__)\n return (int)sizeof(unsigned long) * CHAR_BIT - 1 - __builtin_clzl((unsigned long)n);\n#else\n #define lt(n) n, n, n, n, n, n, n, n, n, n, n, n, n, n, n, n\n static const char tbl[256] = {\n 0,0,1,1,2,2,2,2,3,3,3,3,3,3,3,3,lt(4), lt(5), lt(5), lt(6), lt(6), lt(6), lt(6),\n lt(7), lt(7), lt(7), lt(7), lt(7), lt(7), lt(7), lt(7)};\n int tt, t;\n if ((tt = (n >> 16))) {\n return (t = (tt >> 8)) ? 24 + tbl[t] : 16 + tbl[tt];\n } else {\n return (t = (n >> 8)) ? 8 + tbl[t] : tbl[n];\n }\n #undef lt\n#endif\n}\nstatic unsigned\nsdefl_uload32(const void *p) {\n /* hopefully will be optimized to an unaligned read */\n unsigned n = 0;\n memcpy(&n, p, sizeof(n));\n return n;\n}\nstatic unsigned\nsdefl_hash32(const void *p) {\n unsigned n = sdefl_uload32(p);\n return (n * 0x9E377989) >> (32 - SDEFL_HASH_BITS);\n}\nstatic void\nsdefl_put(unsigned char **dst, struct sdefl *s, int code, int bitcnt) {\n s->bits |= (code << s->bitcnt);\n s->bitcnt += bitcnt;\n while (s->bitcnt >= 8) {\n unsigned char *tar = *dst;\n *tar = (unsigned char)(s->bits & 0xFF);\n s->bits >>= 8;\n s->bitcnt -= 8;\n *dst = *dst + 1;\n }\n}\nstatic void\nsdefl_heap_sub(unsigned A[], unsigned len, unsigned sub) {\n unsigned c, p = sub;\n unsigned v = A[sub];\n while ((c = p << 1) <= len) {\n if (c < len && A[c + 1] > A[c]) c++;\n if (v >= A[c]) break;\n A[p] = A[c], p = c;\n }\n A[p] = v;\n}\nstatic void\nsdefl_heap_array(unsigned *A, unsigned len) {\n unsigned sub;\n for (sub = len >> 1; sub >= 1; sub--)\n sdefl_heap_sub(A, len, sub);\n}\nstatic void\nsdefl_heap_sort(unsigned *A, unsigned n) {\n A--;\n sdefl_heap_array(A, n);\n while (n >= 2) {\n unsigned tmp = A[n];\n A[n--] = A[1];\n A[1] = tmp;\n sdefl_heap_sub(A, n, 1);\n }\n}\nstatic unsigned\nsdefl_sort_sym(unsigned sym_cnt, unsigned *freqs,\n unsigned char *lens, unsigned *sym_out) {\n unsigned cnts[SDEFL_CNT_NUM(SDEFL_SYM_MAX)] = {0};\n unsigned cnt_num = SDEFL_CNT_NUM(sym_cnt);\n unsigned used_sym = 0;\n unsigned sym, i;\n for (sym = 0; sym < sym_cnt; sym++)\n cnts[freqs[sym] < cnt_num-1 ? freqs[sym]: cnt_num-1]++;\n for (i = 1; i < cnt_num; i++) {\n unsigned cnt = cnts[i];\n cnts[i] = used_sym;\n used_sym += cnt;\n }\n for (sym = 0; sym < sym_cnt; sym++) {\n unsigned freq = freqs[sym];\n if (freq) {\n unsigned idx = freq < cnt_num-1 ? freq : cnt_num-1;\n sym_out[cnts[idx]++] = sym | (freq << SDEFL_SYM_BITS);\n } else lens[sym] = 0;\n }\n sdefl_heap_sort(sym_out + cnts[cnt_num-2], cnts[cnt_num-1] - cnts[cnt_num-2]);\n return used_sym;\n}\nstatic void\nsdefl_build_tree(unsigned *A, unsigned sym_cnt) {\n unsigned i = 0, b = 0, e = 0;\n do {\n unsigned m, n, freq_shift;\n if (i != sym_cnt && (b == e || (A[i] >> SDEFL_SYM_BITS) <= (A[b] >> SDEFL_SYM_BITS)))\n m = i++;\n else m = b++;\n if (i != sym_cnt && (b == e || (A[i] >> SDEFL_SYM_BITS) <= (A[b] >> SDEFL_SYM_BITS)))\n n = i++;\n else n = b++;\n\n freq_shift = (A[m] & ~SDEFL_SYM_MSK) + (A[n] & ~SDEFL_SYM_MSK);\n A[m] = (A[m] & SDEFL_SYM_MSK) | (e << SDEFL_SYM_BITS);\n A[n] = (A[n] & SDEFL_SYM_MSK) | (e << SDEFL_SYM_BITS);\n A[e] = (A[e] & SDEFL_SYM_MSK) | freq_shift;\n } while (sym_cnt - ++e > 1);\n}\nstatic void\nsdefl_gen_len_cnt(unsigned *A, unsigned root, unsigned *len_cnt,\n unsigned max_code_len) {\n int n;\n unsigned i;\n for (i = 0; i <= max_code_len; i++)\n len_cnt[i] = 0;\n len_cnt[1] = 2;\n\n A[root] &= SDEFL_SYM_MSK;\n for (n = (int)root - 1; n >= 0; n--) {\n unsigned p = A[n] >> SDEFL_SYM_BITS;\n unsigned pdepth = A[p] >> SDEFL_SYM_BITS;\n unsigned depth = pdepth + 1;\n unsigned len = depth;\n\n A[n] = (A[n] & SDEFL_SYM_MSK) | (depth << SDEFL_SYM_BITS);\n if (len >= max_code_len) {\n len = max_code_len;\n do len--; while (!len_cnt[len]);\n }\n len_cnt[len]--;\n len_cnt[len+1] += 2;\n }\n}\nstatic void\nsdefl_gen_codes(unsigned *A, unsigned char *lens, const unsigned *len_cnt,\n unsigned max_code_word_len, unsigned sym_cnt) {\n unsigned i, sym, len, nxt[SDEFL_MAX_CODE_LEN + 1];\n for (i = 0, len = max_code_word_len; len >= 1; len--) {\n unsigned cnt = len_cnt[len];\n while (cnt--) lens[A[i++] & SDEFL_SYM_MSK] = (unsigned char)len;\n }\n nxt[0] = nxt[1] = 0;\n for (len = 2; len <= max_code_word_len; len++)\n nxt[len] = (nxt[len-1] + len_cnt[len-1]) << 1;\n for (sym = 0; sym < sym_cnt; sym++)\n A[sym] = nxt[lens[sym]]++;\n}\nstatic unsigned\nsdefl_rev(unsigned c, unsigned char n) {\n c = ((c & 0x5555) << 1) | ((c & 0xAAAA) >> 1);\n c = ((c & 0x3333) << 2) | ((c & 0xCCCC) >> 2);\n c = ((c & 0x0F0F) << 4) | ((c & 0xF0F0) >> 4);\n c = ((c & 0x00FF) << 8) | ((c & 0xFF00) >> 8);\n return c >> (16-n);\n}\nstatic void\nsdefl_huff(unsigned char *lens, unsigned *codes, unsigned *freqs,\n unsigned num_syms, unsigned max_code_len) {\n unsigned c, *A = codes;\n unsigned len_cnt[SDEFL_MAX_CODE_LEN + 1];\n unsigned used_syms = sdefl_sort_sym(num_syms, freqs, lens, A);\n if (!used_syms) return;\n if (used_syms == 1) {\n unsigned s = A[0] & SDEFL_SYM_MSK;\n unsigned i = s ? s : 1;\n codes[0] = 0, lens[0] = 1;\n codes[i] = 1, lens[i] = 1;\n return;\n }\n sdefl_build_tree(A, used_syms);\n sdefl_gen_len_cnt(A, used_syms-2, len_cnt, max_code_len);\n sdefl_gen_codes(A, lens, len_cnt, max_code_len, num_syms);\n for (c = 0; c < num_syms; c++) {\n codes[c] = sdefl_rev(codes[c], lens[c]);\n }\n}\nstruct sdefl_symcnt {\n int items;\n int lit;\n int off;\n};\nstatic void\nsdefl_precode(struct sdefl_symcnt *cnt, unsigned *freqs, unsigned *items,\n const unsigned char *litlen, const unsigned char *offlen) {\n unsigned *at = items;\n unsigned run_start = 0;\n\n unsigned total = 0;\n unsigned char lens[SDEFL_SYM_MAX + SDEFL_OFF_MAX];\n for (cnt->lit = SDEFL_SYM_MAX; cnt->lit > 257; cnt->lit--)\n if (litlen[cnt->lit - 1]) break;\n for (cnt->off = SDEFL_OFF_MAX; cnt->off > 1; cnt->off--)\n if (offlen[cnt->off - 1]) break;\n\n total = (unsigned)(cnt->lit + cnt->off);\n memcpy(lens, litlen, sizeof(unsigned char) * (size_t)cnt->lit);\n memcpy(lens + cnt->lit, offlen, sizeof(unsigned char) * (size_t)cnt->off);\n do {\n unsigned len = lens[run_start];\n unsigned run_end = run_start;\n do run_end++; while (run_end != total && len == lens[run_end]);\n if (!len) {\n while ((run_end - run_start) >= 11) {\n unsigned n = (run_end - run_start) - 11;\n unsigned xbits = n < 0x7f ? n : 0x7f;\n freqs[18]++;\n *at++ = 18u | (xbits << 5u);\n run_start += 11 + xbits;\n }\n if ((run_end - run_start) >= 3) {\n unsigned n = (run_end - run_start) - 3;\n unsigned xbits = n < 0x7 ? n : 0x7;\n freqs[17]++;\n *at++ = 17u | (xbits << 5u);\n run_start += 3 + xbits;\n }\n } else if ((run_end - run_start) >= 4) {\n freqs[len]++;\n *at++ = len;\n run_start++;\n do {\n unsigned xbits = (run_end - run_start) - 3;\n xbits = xbits < 0x03 ? xbits : 0x03;\n *at++ = 16 | (xbits << 5);\n run_start += 3 + xbits;\n freqs[16]++;\n } while ((run_end - run_start) >= 3);\n }\n while (run_start != run_end) {\n freqs[len]++;\n *at++ = len;\n run_start++;\n }\n } while (run_start != total);\n cnt->items = (int)(at - items);\n}\nstruct sdefl_match_codest {\n int ls, lc;\n int dc, dx;\n};\nstatic void\nsdefl_match_codes(struct sdefl_match_codest *cod, int dist, int len) {\n static const short dxmax[] = {0,6,12,24,48,96,192,384,768,1536,3072,6144,12288,24576};\n static const unsigned char lslot[258+1] = {\n 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 12,\n 12, 13, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15, 15, 16, 16, 16, 16, 16,\n 16, 16, 16, 17, 17, 17, 17, 17, 17, 17, 17, 18, 18, 18, 18, 18, 18, 18,\n 18, 19, 19, 19, 19, 19, 19, 19, 19, 20, 20, 20, 20, 20, 20, 20, 20, 20,\n 20, 20, 20, 20, 20, 20, 20, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,\n 21, 21, 21, 21, 21, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22,\n 22, 22, 22, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23,\n 23, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,\n 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 25, 25, 25,\n 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,\n 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 26, 26, 26, 26, 26, 26, 26,\n 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26,\n 26, 26, 26, 26, 26, 26, 26, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27,\n 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27,\n 27, 27, 28\n };\n assert(len <= 258);\n assert(dist <= 32768);\n cod->ls = lslot[len];\n cod->lc = 257 + cod->ls;\n assert(cod->lc <= 285);\n\n cod->dx = sdefl_ilog2(sdefl_npow2(dist) >> 2);\n cod->dc = cod->dx ? ((cod->dx + 1) << 1) + (dist > dxmax[cod->dx]) : dist-1;\n}\nenum sdefl_blk_type {\n SDEFL_BLK_UCOMPR,\n SDEFL_BLK_DYN\n};\nstatic enum sdefl_blk_type\nsdefl_blk_type(const struct sdefl *s, int blk_len, int pre_item_len,\n const unsigned *pre_freq, const unsigned char *pre_len) {\n static const unsigned char x_pre_bits[] = { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,3,7};\n static const unsigned char x_len_bits[] = {0,0,0,0,0,0,0,0, 1,1,1,1,2,2,2,2,\n 3,3,3,3,4,4,4,4, 5,5,5,5,0};\n static const unsigned char x_off_bits[] = {0,0,0,0,1,1,2,2, 3,3,4,4,5,5,6,6,\n 7,7,8,8,9,9,10,10, 11,11,12,12,13,13};\n\n int dyn_cost = 0;\n int fix_cost = 0;\n int sym = 0;\n\n dyn_cost += 5 + 5 + 4 + (3 * pre_item_len);\n for (sym = 0; sym < SDEFL_PRE_MAX; sym++)\n dyn_cost += pre_freq[sym] * (x_pre_bits[sym] + pre_len[sym]);\n for (sym = 0; sym < 256; sym++)\n dyn_cost += s->freq.lit[sym] * s->cod.len.lit[sym];\n dyn_cost += s->cod.len.lit[SDEFL_EOB];\n for (sym = 257; sym < 286; sym++)\n dyn_cost += s->freq.lit[sym] * (x_len_bits[sym - 257] + s->cod.len.lit[sym]);\n for (sym = 0; sym < 30; sym++)\n dyn_cost += s->freq.off[sym] * (x_off_bits[sym] + s->cod.len.off[sym]);\n\n fix_cost += 8*(5 * sdefl_div_round_up(blk_len, SDEFL_RAW_BLK_SIZE) + blk_len + 1 + 2);\n return (dyn_cost < fix_cost) ? SDEFL_BLK_DYN : SDEFL_BLK_UCOMPR;\n}\nstatic void\nsdefl_put16(unsigned char **dst, unsigned short x) {\n unsigned char *val = *dst;\n val[0] = (unsigned char)(x & 0xff);\n val[1] = (unsigned char)(x >> 8);\n *dst = val + 2;\n}\nstatic void\nsdefl_match(unsigned char **dst, struct sdefl *s, int dist, int len) {\n static const char lxn[] = {0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0};\n static const short lmin[] = {3,4,5,6,7,8,9,10,11,13,15,17,19,23,27,31,35,43,\n 51,59,67,83,99,115,131,163,195,227,258};\n static const short dmin[] = {1,2,3,4,5,7,9,13,17,25,33,49,65,97,129,193,257,\n 385,513,769,1025,1537,2049,3073,4097,6145,8193,12289,16385,24577};\n\n struct sdefl_match_codest cod;\n sdefl_match_codes(&cod, dist, len);\n sdefl_put(dst, s, (int)s->cod.word.lit[cod.lc], s->cod.len.lit[cod.lc]);\n sdefl_put(dst, s, len - lmin[cod.ls], lxn[cod.ls]);\n sdefl_put(dst, s, (int)s->cod.word.off[cod.dc], s->cod.len.off[cod.dc]);\n sdefl_put(dst, s, dist - dmin[cod.dc], cod.dx);\n}\nstatic void\nsdefl_flush(unsigned char **dst, struct sdefl *s, int is_last,\n const unsigned char *in, int blk_begin, int blk_end) {\n int blk_len = blk_end - blk_begin;\n int j, i = 0, item_cnt = 0;\n struct sdefl_symcnt symcnt = {0};\n unsigned codes[SDEFL_PRE_MAX];\n unsigned char lens[SDEFL_PRE_MAX];\n unsigned freqs[SDEFL_PRE_MAX] = {0};\n unsigned items[SDEFL_SYM_MAX + SDEFL_OFF_MAX];\n static const unsigned char perm[SDEFL_PRE_MAX] = {16,17,18,0,8,7,9,6,10,5,11,\n 4,12,3,13,2,14,1,15};\n\n /* calculate huffman codes */\n s->freq.lit[SDEFL_EOB]++;\n sdefl_huff(s->cod.len.lit, s->cod.word.lit, s->freq.lit, SDEFL_SYM_MAX, SDEFL_LIT_LEN_CODES);\n sdefl_huff(s->cod.len.off, s->cod.word.off, s->freq.off, SDEFL_OFF_MAX, SDEFL_OFF_CODES);\n sdefl_precode(&symcnt, freqs, items, s->cod.len.lit, s->cod.len.off);\n sdefl_huff(lens, codes, freqs, SDEFL_PRE_MAX, SDEFL_PRE_CODES);\n for (item_cnt = SDEFL_PRE_MAX; item_cnt > 4; item_cnt--) {\n if (lens[perm[item_cnt - 1]]){\n break;\n }\n }\n /* write block */\n switch (sdefl_blk_type(s, blk_len, item_cnt, freqs, lens)) {\n case SDEFL_BLK_UCOMPR: {\n /* uncompressed blocks */\n int n = sdefl_div_round_up(blk_len, SDEFL_RAW_BLK_SIZE);\n for (i = 0; i < n; ++i) {\n int fin = is_last && (i + 1 == n);\n int amount = blk_len < SDEFL_RAW_BLK_SIZE ? blk_len : SDEFL_RAW_BLK_SIZE;\n sdefl_put(dst, s, !!fin, 1); /* block */\n sdefl_put(dst, s, 0x00, 2); /* stored block */\n if (s->bitcnt) {\n sdefl_put(dst, s, 0x00, 8 - s->bitcnt);\n }\n assert(s->bitcnt == 0);\n sdefl_put16(dst, (unsigned short)amount);\n sdefl_put16(dst, ~(unsigned short)amount);\n memcpy(*dst, in + blk_begin + i * SDEFL_RAW_BLK_SIZE, amount);\n *dst = *dst + amount;\n blk_len -= amount;\n }\n } break;\n case SDEFL_BLK_DYN: {\n /* dynamic huffman block */\n sdefl_put(dst, s, !!is_last, 1); /* block */\n sdefl_put(dst, s, 0x02, 2); /* dynamic huffman */\n sdefl_put(dst, s, symcnt.lit - 257, 5);\n sdefl_put(dst, s, symcnt.off - 1, 5);\n sdefl_put(dst, s, item_cnt - 4, 4);\n for (i = 0; i < item_cnt; ++i) {\n sdefl_put(dst, s, lens[perm[i]], 3);\n }\n for (i = 0; i < symcnt.items; ++i) {\n unsigned sym = items[i] & 0x1F;\n sdefl_put(dst, s, (int)codes[sym], lens[sym]);\n if (sym < 16) continue;\n if (sym == 16) sdefl_put(dst, s, items[i] >> 5, 2);\n else if(sym == 17) sdefl_put(dst, s, items[i] >> 5, 3);\n else sdefl_put(dst, s, items[i] >> 5, 7);\n }\n /* block sequences */\n for (i = 0; i < s->seq_cnt; ++i) {\n if (s->seq[i].off >= 0) {\n for (j = 0; j < s->seq[i].len; ++j) {\n int c = in[s->seq[i].off + j];\n sdefl_put(dst, s, (int)s->cod.word.lit[c], s->cod.len.lit[c]);\n }\n } else {\n sdefl_match(dst, s, -s->seq[i].off, s->seq[i].len);\n }\n }\n sdefl_put(dst, s, (int)(s)->cod.word.lit[SDEFL_EOB], (s)->cod.len.lit[SDEFL_EOB]);\n } break;}\n memset(&s->freq, 0, sizeof(s->freq));\n s->seq_cnt = 0;\n}\nstatic void\nsdefl_seq(struct sdefl *s, int off, int len) {\n assert(s->seq_cnt + 2 < SDEFL_SEQ_SIZ);\n s->seq[s->seq_cnt].off = off;\n s->seq[s->seq_cnt].len = len;\n s->seq_cnt++;\n}\nstatic void\nsdefl_reg_match(struct sdefl *s, int off, int len) {\n struct sdefl_match_codest cod;\n sdefl_match_codes(&cod, off, len);\n\n assert(cod.lc < SDEFL_SYM_MAX);\n assert(cod.dc < SDEFL_OFF_MAX);\n\n s->freq.lit[cod.lc]++;\n s->freq.off[cod.dc]++;\n}\nstruct sdefl_match {\n int off;\n int len;\n};\nstatic void\nsdefl_fnd(struct sdefl_match *m, const struct sdefl *s, int chain_len,\n int max_match, const unsigned char *in, int p, int e) {\n int i = s->tbl[sdefl_hash32(in + p)];\n int limit = ((p - SDEFL_WIN_SIZ) < SDEFL_NIL) ? SDEFL_NIL : (p-SDEFL_WIN_SIZ);\n (void)e; /* used in assertions */\n\n assert(p < e);\n assert(p + max_match <= e);\n while (i > limit) {\n assert(i + m->len < e);\n assert(p + m->len < e);\n assert(i + SDEFL_MIN_MATCH < e);\n assert(p + SDEFL_MIN_MATCH < e);\n\n if (in[i + m->len] == in[p + m->len] &&\n (sdefl_uload32(&in[i]) == sdefl_uload32(&in[p]))) {\n int n = SDEFL_MIN_MATCH;\n while (n < max_match && in[i + n] == in[p + n]) {\n assert(i + n < e);\n assert(p + n < e);\n n++;\n }\n if (n > m->len) {\n m->len = n, m->off = p - i;\n if (n == max_match)\n break;\n }\n }\n if (!(--chain_len)) break;\n i = s->prv[i & SDEFL_WIN_MSK];\n }\n}\nstatic int\nsdefl_compr(struct sdefl *s, unsigned char *out, const unsigned char *in,\n int in_len, int lvl) {\n unsigned char *q = out;\n static const unsigned char pref[] = {8,10,14,24,30,48,65,96,130};\n int max_chain = (lvl < 8) ? (1 << (lvl + 1)): (1 << 13);\n int n, i = 0, litlen = 0;\n for (n = 0; n < SDEFL_HASH_SIZ; ++n) {\n s->tbl[n] = SDEFL_NIL;\n }\n do {int blk_begin = i;\n int blk_end = ((i + SDEFL_BLK_MAX) < in_len) ? (i + SDEFL_BLK_MAX) : in_len;\n while (i < blk_end) {\n struct sdefl_match m = {0};\n int left = blk_end - i;\n int max_match = (left > SDEFL_MAX_MATCH) ? SDEFL_MAX_MATCH : left;\n int nice_match = pref[lvl] < max_match ? pref[lvl] : max_match;\n int run = 1, inc = 1, run_inc = 0;\n if (max_match > SDEFL_MIN_MATCH) {\n sdefl_fnd(&m, s, max_chain, max_match, in, i, in_len);\n }\n if (lvl >= 5 && m.len >= SDEFL_MIN_MATCH && m.len + 1 < nice_match){\n struct sdefl_match m2 = {0};\n sdefl_fnd(&m2, s, max_chain, m.len + 1, in, i + 1, in_len);\n m.len = (m2.len > m.len) ? 0 : m.len;\n }\n if (m.len >= SDEFL_MIN_MATCH) {\n if (litlen) {\n sdefl_seq(s, i - litlen, litlen);\n litlen = 0;\n }\n sdefl_seq(s, -m.off, m.len);\n sdefl_reg_match(s, m.off, m.len);\n if (lvl < 2 && m.len >= nice_match) {\n inc = m.len;\n } else {\n run = m.len;\n }\n } else {\n s->freq.lit[in[i]]++;\n litlen++;\n }\n run_inc = run * inc;\n if (in_len - (i + run_inc) > SDEFL_MIN_MATCH) {\n while (run-- > 0) {\n unsigned h = sdefl_hash32(&in[i]);\n s->prv[i&SDEFL_WIN_MSK] = s->tbl[h];\n s->tbl[h] = i, i += inc;\n assert(i <= blk_end);\n }\n } else {\n i += run_inc;\n assert(i <= blk_end);\n }\n }\n if (litlen) {\n sdefl_seq(s, i - litlen, litlen);\n litlen = 0;\n }\n sdefl_flush(&q, s, blk_end == in_len, in, blk_begin, blk_end);\n } while (i < in_len);\n if (s->bitcnt) {\n sdefl_put(&q, s, 0x00, 8 - s->bitcnt);\n }\n assert(s->bitcnt == 0);\n return (int)(q - out);\n}\nextern int\nsdeflate(struct sdefl *s, void *out, const void *in, int n, int lvl) {\n s->bits = s->bitcnt = 0;\n return sdefl_compr(s, (unsigned char*)out, (const unsigned char*)in, n, lvl);\n}\nstatic unsigned\nsdefl_adler32(unsigned adler32, const unsigned char *in, int in_len) {\n #define SDEFL_ADLER_INIT (1)\n const unsigned ADLER_MOD = 65521;\n unsigned s1 = adler32 & 0xffff;\n unsigned s2 = adler32 >> 16;\n unsigned blk_len, i;\n\n blk_len = in_len % 5552;\n while (in_len) {\n for (i = 0; i + 7 < blk_len; i += 8) {\n s1 += in[0]; s2 += s1;\n s1 += in[1]; s2 += s1;\n s1 += in[2]; s2 += s1;\n s1 += in[3]; s2 += s1;\n s1 += in[4]; s2 += s1;\n s1 += in[5]; s2 += s1;\n s1 += in[6]; s2 += s1;\n s1 += in[7]; s2 += s1;\n in += 8;\n }\n for (; i < blk_len; ++i) {\n s1 += *in++, s2 += s1;\n }\n s1 %= ADLER_MOD;\n s2 %= ADLER_MOD;\n in_len -= blk_len;\n blk_len = 5552;\n }\n return (unsigned)(s2 << 16) + (unsigned)s1;\n}\nextern int\nzsdeflate(struct sdefl *s, void *out, const void *in, int n, int lvl) {\n int p = 0;\n unsigned a = 0;\n unsigned char *q = (unsigned char*)out;\n\n s->bits = s->bitcnt = 0;\n sdefl_put(&q, s, 0x78, 8); /* deflate, 32k window */\n sdefl_put(&q, s, 0x01, 8); /* fast compression */\n q += sdefl_compr(s, q, (const unsigned char*)in, n, lvl);\n\n /* append adler checksum */\n a = sdefl_adler32(SDEFL_ADLER_INIT, (const unsigned char*)in, n);\n for (p = 0; p < 4; ++p) {\n sdefl_put(&q, s, (a >> 24) & 0xFF, 8);\n a <<= 8;\n }\n return (int)(q - (unsigned char*)out);\n}\nextern int\nsdefl_bound(int len) {\n int max_blocks = 1 + sdefl_div_round_up(len, SDEFL_RAW_BLK_SIZE);\n int bound = 5 * max_blocks + len + 1 + 4 + 8 + 3;\n return bound;\n}\n\n#ifdef __cplusplus\n}\n#endif\n\n#endif /* SDEFL_IMPLEMENTATION */\n" }, { "path": "gltf/README.md", "content": "# 📦 gltfpack\n\ngltfpack is a tool that can automatically optimize glTF files to reduce the download size and improve loading and rendering speed.\n\n## Installation\n\nYou can download a pre-built binary for gltfpack on [Releases page](https://github.com/zeux/meshoptimizer/releases), or install [npm package](https://www.npmjs.com/package/gltfpack). Native binaries are recommended over npm since they can work with larger files, run faster, and support texture compression.\n\n## Usage\n\nTo convert a glTF file using gltfpack, run the command-line binary like this on an input `.gltf`/`.glb`/`.obj` file (run it without arguments for a list of options):\n\n```\ngltfpack -i scene.gltf -o scene.glb\n```\n\ngltfpack substantially changes the glTF data by optimizing the meshes for vertex fetch and transform cache, quantizing the geometry to reduce the memory consumption and size, merging meshes to reduce the draw call count, quantizing and resampling animations to reduce animation size and simplify playback, and pruning the node tree by removing or collapsing redundant nodes. It will also simplify the meshes when requested to do so.\n\nBy default gltfpack outputs regular `.glb`/`.gltf` files that have been optimized for GPU consumption using various cache optimizers and quantization. These files can be loaded by GLTF loaders that support `KHR_mesh_quantization` extension such as [three.js](https://threejs.org/) (r111+) and [Babylon.js](https://www.babylonjs.com/) (4.1+).\n\nWhen using `-c` option, gltfpack outputs compressed `.glb`/`.gltf` files that use meshoptimizer codecs to reduce the download size further. Loading these files requires extending GLTF loaders with support for [EXT_meshopt_compression](https://github.com/KhronosGroup/glTF/blob/main/extensions/2.0/Vendor/EXT_meshopt_compression/README.md) extension; three.js supports it in r122+ (requires calling `GLTFLoader.setMeshoptDecoder`), Babylon.js supports it in 5.0+ without further setup.\n\nFor better compression, you can use `-cc` option which applies additional compression; additionally make sure that your content delivery method is configured to use deflate (gzip) - meshoptimizer codecs are designed to produce output that can be compressed further with general purpose compressors. For maximum compression, consider using [KHR_meshopt_compression](https://github.com/KhronosGroup/glTF/pull/2517) extension with a higher compression level (`-cz` option).\n\ngltfpack can also compress textures using Basis Universal format stored in a KTX2 container (`-tc` flag, requires support for `KHR_texture_basisu`) or using WebP format (`-tw` flag, requires support for `EXT_texture_webp`).\n\nWhen working with glTF files that contain point clouds, gltfpack automatically processes the point cloud data to reduce the download size to the extent possible. In addition to aforementioned compression options (either `-c` or `-cc` are recommended), gltfpack can also prune point clouds to provide a more uniform density when `-si` option is used.\n\n## Decompression\n\nWhen using compressed files, [js/meshopt_decoder.mjs](https://github.com/zeux/meshoptimizer/blob/master/js/meshopt_decoder.mjs) needs to be loaded to provide the WebAssembly decoder module like this:\n\n```js\nimport { MeshoptDecoder } from './meshopt_decoder.mjs';\n\n...\n\nvar loader = new GLTFLoader();\nloader.setMeshoptDecoder(MeshoptDecoder);\nloader.load('pirate.glb', function (gltf) { scene.add(gltf.scene); });\n```\n\nWhen using Three.js, this module can be imported from three.js repository from `examples/jsm/libs/meshopt_decoder.module.js`.\n\nNote that `meshopt_decoder` assumes that WebAssembly is supported. This is the case for all modern browsers; if support for legacy browsers such as Internet Explorer 11 is desired, it's recommended to use `-cf` flag when creating the glTF content. This will create and load fallback uncompressed buffers, but only on browsers that don't support WebAssembly.\n\n## Options\n\nBy default gltfpack makes certain assumptions when optimizing the scenes, for example meshes that belong to nodes that aren't animated can be merged together, and has some defaults that represent a tradeoff between precision and size that are picked to fit most use cases. However, in some cases the resulting `.gltf` file needs to retain some way for the application to manipulate individual scene elements, and in other cases precision or size are more important to optimize for. gltfpack has a rich set of command line options to control various aspects of its behavior, with the full list available via `gltfpack -h`.\n\nThe following settings are frequently used to reduce the resulting data size:\n\n* `-cc`: produce compressed gltf/glb files (requires `EXT_meshopt_compression`)\n* `-tc`: convert all textures to KTX2 with BasisU supercompression (requires `KHR_texture_basisu` and may require `-tp` flag for compatibility with WebGL 1)\n* `-tw`: convert all textures to WebP (requires `EXT_texture_webp`)\n* `-mi`: use mesh instancing when serializing references to the same meshes (requires `EXT_mesh_gpu_instancing`)\n* `-si R`: simplify meshes targeting triangle/point count ratio R (default: 1; R should be between 0 and 1)\n\nThe following settings are frequently used to restrict some optimizations:\n\n* `-kn`: keep named nodes and meshes attached to named nodes so that named nodes can be transformed externally\n* `-km`: keep named materials and disable named material merging\n* `-ke`: keep extras data\n* `-vpf`: use floating-point position quantization instead of the default fixed-point (this results in larger position data, but does not insert new nodes with dequantization transforms; when using this option, `-cc` is recommended as well)\n\n## Extensions\n\ngltfpack supports most Khronos extensions and some multi-vendor extensions in the input scenes, with newer extensions added regularly. The following extensions are fully supported:\n\n- KHR_lights_punctual\n- KHR_materials_anisotropy\n- KHR_materials_clearcoat\n- KHR_materials_diffuse_transmission\n- KHR_materials_dispersion\n- KHR_materials_emissive_strength\n- KHR_materials_ior\n- KHR_materials_iridescence\n- KHR_materials_pbrSpecularGlossiness\n- KHR_materials_sheen\n- KHR_materials_specular\n- KHR_materials_transmission\n- KHR_materials_unlit\n- KHR_materials_variants\n- KHR_materials_volume\n- KHR_mesh_quantization\n- KHR_meshopt_compression\n- KHR_texture_basisu\n- KHR_texture_transform\n- EXT_mesh_gpu_instancing\n- EXT_meshopt_compression\n- EXT_texture_webp\n\nEven if the source file does not use extensions, gltfpack may use some extensions in the output file either by default or when certain options are used:\n\n- KHR_mesh_quantization (used by default unless disabled via `-noq`)\n- KHR_meshopt_compression (used when requested via `-ce khr` or `-cz`)\n- KHR_texture_transform (used by default when textures are present, unless disabled via `-noq` or `-vtf`)\n- KHR_texture_basisu (used when requested via `-tc` or `-tu`)\n- EXT_meshopt_compression (used when requested via `-c` or `-cc`)\n- EXT_mesh_gpu_instancing (used when requested via `-mi`)\n- EXT_texture_webp (used when requested via `-tw`)\n\ngltfpack does not support vendor-specific extensions or custom extensions, including ones defined in [Khronos glTF repository](https://github.com/KhronosGroup/glTF/tree/main/extensions/2.0/Vendor). Unknown extension nodes are discarded from the output.\n\n## Custom data\n\nglTF files may contain custom application-specific data stored outside of custom extensions. gltfpack has limited support for preserving this data.\n\nUnknown vertex or instance attributes are generally discarded. While it would be possible to preserve them in theory, many scene transformations and analyses require a full understanding of the attribute semantics - some attributes need to be transformed with the mesh transformation matrix, some need to be adjusted when meshes are merged, some influence how meshes are rendered, etc. However, gltfpack supports some specific attributes that are commonly used in the ecosystem:\n\n- Vertex attributes that store integer IDs with names `_ID`, `_BATCHID` or `_FEATURE_ID_n` are preserved as-is. These can be used to identify objects.\n- Instance attribute `_COLOR_0` is preserved as-is. This can be used to provide per-instance color tinting.\n\nAdditional application-specific data can be stored via the glTF `extras` property. While extras (outside of `asset`) are discarded by default, using the `-ke` option preserves extras in materials, nodes, primitives and scenes.\n\nIn addition to `asset` extras, gltfpack unconditionally preserves morph target names specified via the `targetNames` property inside `extras` on meshes.\n\n## Building\n\ngltfpack can be built from source using CMake or Make. To build a full version of gltfpack that supports texture compression, CMake configuration needs to specify the path to https://github.com/zeux/basis_universal fork (branch gltfpack) via `MESHOPT_GLTFPACK_BASISU_PATH` variable, as well as libwebp path via `MESHOPT_GLTFPACK_LIBWEBP_PATH` variable:\n\n```\ngit clone -b gltfpack https://github.com/zeux/basis_universal\ngit clone https://github.com/webmproject/libwebp\ncmake . -DMESHOPT_BUILD_GLTFPACK=ON -DMESHOPT_GLTFPACK_BASISU_PATH=basis_universal -DMESHOPT_GLTFPACK_LIBWEBP_PATH=libwebp -DCMAKE_BUILD_TYPE=Release\ncmake --build . --target gltfpack --config Release\n```\n\n## License\n\ngltfpack is available to anybody free of charge, under the terms of MIT License (see LICENSE.md).\n" }, { "path": "gltf/animation.cpp", "content": "// This file is part of gltfpack; see gltfpack.h for version/license details\n#include \"gltfpack.h\"\n\n#include \n\n#include \n#include \n#include \n\nstatic float getDelta(const Attr& l, const Attr& r, cgltf_animation_path_type type)\n{\n\tswitch (type)\n\t{\n\tcase cgltf_animation_path_type_translation:\n\t\treturn std::max(std::max(fabsf(l.f[0] - r.f[0]), fabsf(l.f[1] - r.f[1])), fabsf(l.f[2] - r.f[2]));\n\n\tcase cgltf_animation_path_type_rotation:\n\t\treturn 2 * acosf(std::min(1.f, fabsf(l.f[0] * r.f[0] + l.f[1] * r.f[1] + l.f[2] * r.f[2] + l.f[3] * r.f[3])));\n\n\tcase cgltf_animation_path_type_scale:\n\t\treturn std::max(std::max(fabsf(l.f[0] / r.f[0] - 1), fabsf(l.f[1] / r.f[1] - 1)), fabsf(l.f[2] / r.f[2] - 1));\n\n\tcase cgltf_animation_path_type_weights:\n\t\treturn fabsf(l.f[0] - r.f[0]);\n\n\tdefault:\n\t\tassert(!\"Uknown animation path\");\n\t\treturn 0;\n\t}\n}\n\nstatic float getDeltaTolerance(cgltf_animation_path_type type)\n{\n\tswitch (type)\n\t{\n\tcase cgltf_animation_path_type_translation:\n\t\treturn 0.0001f; // 0.1mm linear\n\n\tcase cgltf_animation_path_type_rotation:\n\t\treturn 0.1f * (3.1415926f / 180.f); // 0.1 degrees\n\n\tcase cgltf_animation_path_type_scale:\n\t\treturn 0.001f; // 0.1% ratio\n\n\tcase cgltf_animation_path_type_weights:\n\t\treturn 0.001f; // 0.1% linear\n\n\tdefault:\n\t\tassert(!\"Uknown animation path\");\n\t\treturn 0;\n\t}\n}\n\nstatic Attr interpolateLinear(const Attr& l, const Attr& r, float t, cgltf_animation_path_type type)\n{\n\tif (type == cgltf_animation_path_type_rotation)\n\t{\n\t\t// Approximating slerp, https://zeux.io/2015/07/23/approximating-slerp/\n\t\t// We also handle quaternion double-cover\n\t\tfloat ca = l.f[0] * r.f[0] + l.f[1] * r.f[1] + l.f[2] * r.f[2] + l.f[3] * r.f[3];\n\n\t\tfloat d = fabsf(ca);\n\t\tfloat A = 1.0904f + d * (-3.2452f + d * (3.55645f - d * 1.43519f));\n\t\tfloat B = 0.848013f + d * (-1.06021f + d * 0.215638f);\n\t\tfloat k = A * (t - 0.5f) * (t - 0.5f) + B;\n\t\tfloat ot = t + t * (t - 0.5f) * (t - 1) * k;\n\n\t\tfloat t0 = 1 - ot;\n\t\tfloat t1 = ca > 0 ? ot : -ot;\n\n\t\tAttr lerp = {{\n\t\t l.f[0] * t0 + r.f[0] * t1,\n\t\t l.f[1] * t0 + r.f[1] * t1,\n\t\t l.f[2] * t0 + r.f[2] * t1,\n\t\t l.f[3] * t0 + r.f[3] * t1,\n\t\t}};\n\n\t\tfloat len = sqrtf(lerp.f[0] * lerp.f[0] + lerp.f[1] * lerp.f[1] + lerp.f[2] * lerp.f[2] + lerp.f[3] * lerp.f[3]);\n\n\t\tif (len > 0.f)\n\t\t{\n\t\t\tlerp.f[0] /= len;\n\t\t\tlerp.f[1] /= len;\n\t\t\tlerp.f[2] /= len;\n\t\t\tlerp.f[3] /= len;\n\t\t}\n\n\t\treturn lerp;\n\t}\n\telse\n\t{\n\t\tAttr lerp = {{\n\t\t l.f[0] * (1 - t) + r.f[0] * t,\n\t\t l.f[1] * (1 - t) + r.f[1] * t,\n\t\t l.f[2] * (1 - t) + r.f[2] * t,\n\t\t l.f[3] * (1 - t) + r.f[3] * t,\n\t\t}};\n\n\t\treturn lerp;\n\t}\n}\n\nstatic Attr interpolateHermite(const Attr& v0, const Attr& t0, const Attr& v1, const Attr& t1, float t, float dt, cgltf_animation_path_type type)\n{\n\tfloat s0 = 1 + t * t * (2 * t - 3);\n\tfloat s1 = t + t * t * (t - 2);\n\tfloat s2 = 1 - s0;\n\tfloat s3 = t * t * (t - 1);\n\n\tfloat ts1 = dt * s1;\n\tfloat ts3 = dt * s3;\n\n\tAttr lerp = {{\n\t s0 * v0.f[0] + ts1 * t0.f[0] + s2 * v1.f[0] + ts3 * t1.f[0],\n\t s0 * v0.f[1] + ts1 * t0.f[1] + s2 * v1.f[1] + ts3 * t1.f[1],\n\t s0 * v0.f[2] + ts1 * t0.f[2] + s2 * v1.f[2] + ts3 * t1.f[2],\n\t s0 * v0.f[3] + ts1 * t0.f[3] + s2 * v1.f[3] + ts3 * t1.f[3],\n\t}};\n\n\tif (type == cgltf_animation_path_type_rotation)\n\t{\n\t\tfloat len = sqrtf(lerp.f[0] * lerp.f[0] + lerp.f[1] * lerp.f[1] + lerp.f[2] * lerp.f[2] + lerp.f[3] * lerp.f[3]);\n\n\t\tif (len > 0.f)\n\t\t{\n\t\t\tlerp.f[0] /= len;\n\t\t\tlerp.f[1] /= len;\n\t\t\tlerp.f[2] /= len;\n\t\t\tlerp.f[3] /= len;\n\t\t}\n\t}\n\n\treturn lerp;\n}\n\nstatic void resampleKeyframes(std::vector& data, const std::vector& input, const std::vector& output, cgltf_animation_path_type type, cgltf_interpolation_type interpolation, size_t components, int frames, float mint, int freq)\n{\n\tsize_t cursor = 0;\n\n\tfor (int i = 0; i < frames; ++i)\n\t{\n\t\tfloat time = mint + float(i) / freq;\n\n\t\twhile (cursor + 1 < input.size())\n\t\t{\n\t\t\tfloat next_time = input[cursor + 1];\n\n\t\t\tif (next_time > time)\n\t\t\t\tbreak;\n\n\t\t\tcursor++;\n\t\t}\n\n\t\tif (cursor + 1 < input.size())\n\t\t{\n\t\t\tfloat cursor_time = input[cursor + 0];\n\t\t\tfloat next_time = input[cursor + 1];\n\n\t\t\tfloat range = next_time - cursor_time;\n\t\t\tfloat inv_range = (range == 0.f) ? 0.f : 1.f / (next_time - cursor_time);\n\t\t\tfloat t = std::max(0.f, std::min(1.f, (time - cursor_time) * inv_range));\n\n\t\t\tfor (size_t j = 0; j < components; ++j)\n\t\t\t{\n\t\t\t\tswitch (interpolation)\n\t\t\t\t{\n\t\t\t\tcase cgltf_interpolation_type_linear:\n\t\t\t\t{\n\t\t\t\t\tconst Attr& v0 = output[(cursor + 0) * components + j];\n\t\t\t\t\tconst Attr& v1 = output[(cursor + 1) * components + j];\n\t\t\t\t\tdata.push_back(interpolateLinear(v0, v1, t, type));\n\t\t\t\t}\n\t\t\t\tbreak;\n\n\t\t\t\tcase cgltf_interpolation_type_step:\n\t\t\t\t{\n\t\t\t\t\tconst Attr& v = output[cursor * components + j];\n\t\t\t\t\tdata.push_back(v);\n\t\t\t\t}\n\t\t\t\tbreak;\n\n\t\t\t\tcase cgltf_interpolation_type_cubic_spline:\n\t\t\t\t{\n\t\t\t\t\tconst Attr& v0 = output[(cursor * 3 + 1) * components + j];\n\t\t\t\t\tconst Attr& b0 = output[(cursor * 3 + 2) * components + j];\n\t\t\t\t\tconst Attr& a1 = output[(cursor * 3 + 3) * components + j];\n\t\t\t\t\tconst Attr& v1 = output[(cursor * 3 + 4) * components + j];\n\t\t\t\t\tdata.push_back(interpolateHermite(v0, b0, v1, a1, t, range, type));\n\t\t\t\t}\n\t\t\t\tbreak;\n\n\t\t\t\tdefault:\n\t\t\t\t\tassert(!\"Unknown interpolation type\");\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\telse\n\t\t{\n\t\t\tsize_t offset = (interpolation == cgltf_interpolation_type_cubic_spline) ? cursor * 3 + 1 : cursor;\n\n\t\t\tfor (size_t j = 0; j < components; ++j)\n\t\t\t{\n\t\t\t\tconst Attr& v = output[offset * components + j];\n\t\t\t\tdata.push_back(v);\n\t\t\t}\n\t\t}\n\t}\n}\n\nstatic float getMaxDelta(const std::vector& data, cgltf_animation_path_type type, const Attr* value, size_t components)\n{\n\tassert(data.size() % components == 0);\n\n\tfloat result = 0;\n\n\tfor (size_t i = 0; i < data.size(); i += components)\n\t{\n\t\tfor (size_t j = 0; j < components; ++j)\n\t\t{\n\t\t\tfloat delta = getDelta(value[j], data[i + j], type);\n\n\t\t\tresult = (result < delta) ? delta : result;\n\t\t}\n\t}\n\n\treturn result;\n}\n\nstatic void getBaseTransform(Attr* result, size_t components, cgltf_animation_path_type type, cgltf_node* node)\n{\n\tswitch (type)\n\t{\n\tcase cgltf_animation_path_type_translation:\n\t\tmemcpy(result->f, node->translation, 3 * sizeof(float));\n\t\tbreak;\n\n\tcase cgltf_animation_path_type_rotation:\n\t\tmemcpy(result->f, node->rotation, 4 * sizeof(float));\n\t\tbreak;\n\n\tcase cgltf_animation_path_type_scale:\n\t\tmemcpy(result->f, node->scale, 3 * sizeof(float));\n\t\tbreak;\n\n\tcase cgltf_animation_path_type_weights:\n\t\tif (node->weights_count)\n\t\t{\n\t\t\tassert(node->weights_count == components);\n\t\t\tmemcpy(result->f, node->weights, components * sizeof(float));\n\t\t}\n\t\telse if (node->mesh && node->mesh->weights_count)\n\t\t{\n\t\t\tassert(node->mesh->weights_count == components);\n\t\t\tmemcpy(result->f, node->mesh->weights, components * sizeof(float));\n\t\t}\n\t\tbreak;\n\n\tdefault:\n\t\tassert(!\"Unknown animation path\");\n\t}\n}\n\nstatic float getWorldScale(cgltf_node* node)\n{\n\tfloat transform[16];\n\tcgltf_node_transform_world(node, transform);\n\n\t// 3x3 determinant computes scale^3\n\tfloat a0 = transform[5] * transform[10] - transform[6] * transform[9];\n\tfloat a1 = transform[4] * transform[10] - transform[6] * transform[8];\n\tfloat a2 = transform[4] * transform[9] - transform[5] * transform[8];\n\tfloat det = transform[0] * a0 - transform[1] * a1 + transform[2] * a2;\n\n\treturn powf(fabsf(det), 1.f / 3.f);\n}\n\nvoid processAnimation(Animation& animation, const Settings& settings)\n{\n\tfloat mint = FLT_MAX, maxt = 0;\n\n\tfor (size_t i = 0; i < animation.tracks.size(); ++i)\n\t{\n\t\tconst Track& track = animation.tracks[i];\n\t\tassert(!track.time.empty());\n\n\t\tmint = std::min(mint, track.time.front());\n\t\tmaxt = std::max(maxt, track.time.back());\n\t}\n\n\tanimation.start = mint = std::min(mint, maxt);\n\n\tif (settings.anim_freq)\n\t{\n\t\t// round the number of frames to nearest but favor the \"up\" direction\n\t\t// this means that at 100 Hz resampling, we will try to preserve the last frame <10ms\n\t\t// but if the last frame is <2ms we favor just removing this data\n\t\tint frames = 1 + int((maxt - mint) * settings.anim_freq + 0.8f);\n\n\t\tanimation.frames = frames;\n\t}\n\n\tstd::vector base;\n\n\tfor (size_t i = 0; i < animation.tracks.size(); ++i)\n\t{\n\t\tTrack& track = animation.tracks[i];\n\n\t\tif (settings.anim_freq)\n\t\t{\n\t\t\tstd::vector result;\n\t\t\tresampleKeyframes(result, track.time, track.data, track.path, track.interpolation, track.components, animation.frames, animation.start, settings.anim_freq);\n\n\t\t\ttrack.time.clear();\n\t\t\ttrack.data.swap(result);\n\t\t\ttrack.interpolation = track.interpolation == cgltf_interpolation_type_cubic_spline ? cgltf_interpolation_type_linear : track.interpolation;\n\t\t}\n\n\t\t// getMaxDelta assumes linear/step interpolation for now\n\t\tif (track.interpolation == cgltf_interpolation_type_cubic_spline)\n\t\t\tcontinue;\n\n\t\tfloat tolerance = getDeltaTolerance(track.path);\n\n\t\t// translation tracks use world space tolerance; in the future, we should compute all errors as linear using hierarchy\n\t\tif (track.node && track.node->parent && track.path == cgltf_animation_path_type_translation)\n\t\t{\n\t\t\tfloat scale = getWorldScale(track.node->parent);\n\t\t\ttolerance /= scale == 0.f ? 1.f : scale;\n\t\t}\n\n\t\tfloat deviation = getMaxDelta(track.data, track.path, &track.data[0], track.components);\n\n\t\tif (deviation <= tolerance)\n\t\t{\n\t\t\t// track is constant (equal to first keyframe), we only need the first keyframe\n\t\t\ttrack.constant = true;\n\t\t\ttrack.time.clear();\n\t\t\ttrack.data.resize(track.components);\n\n\t\t\t// track.dummy is true iff track redundantly sets up the value to be equal to default node transform\n\t\t\tbase.resize(track.components);\n\t\t\tgetBaseTransform(&base[0], track.components, track.path, track.node);\n\n\t\t\ttrack.dummy = getMaxDelta(track.data, track.path, &base[0], track.components) <= tolerance;\n\t\t}\n\t}\n}\n" }, { "path": "gltf/cli.js", "content": "#!/usr/bin/env node\n// This file is part of gltfpack and is distributed under the terms of MIT License.\nimport { pack } from './library.js';\nimport fs from 'fs';\n\nvar args = process.argv.slice(2);\n\nvar iface = {\n\tread: function (path) {\n\t\treturn fs.readFileSync(path);\n\t},\n\twrite: function (path, data) {\n\t\tfs.writeFileSync(path, data);\n\t},\n};\n\npack(args, iface)\n\t.then(function (log) {\n\t\tprocess.stdout.write(log);\n\t\tprocess.exit(0);\n\t})\n\t.catch(function (err) {\n\t\tprocess.stderr.write(err.message);\n\t\tprocess.exit(1);\n\t});\n" }, { "path": "gltf/encodebasis.cpp", "content": "// This file is part of gltfpack; see gltfpack.h for version/license details\n#ifdef WITH_BASISU\n#include \"gltfpack.h\"\n\n#define BASISU_NO_ITERATOR_DEBUG_LEVEL\n\n#ifdef __clang__\n#pragma GCC diagnostic ignored \"-Wunknown-warning-option\"\n#pragma GCC diagnostic ignored \"-Warray-bounds\"\n#pragma GCC diagnostic ignored \"-Wc++17-extensions\"\n#pragma GCC diagnostic ignored \"-Wdeprecated-builtins\"\n#endif\n\n#ifdef __GNUC__\n#pragma GCC diagnostic ignored \"-Wclass-memaccess\"\n#pragma GCC diagnostic ignored \"-Wshadow\"\n#pragma GCC diagnostic ignored \"-Wunused-local-typedefs\"\n#pragma GCC diagnostic ignored \"-Wunused-value\"\n#endif\n\n#if defined(__GNUC__) && __GNUC__ >= 12\n#pragma GCC diagnostic ignored \"-Wc++17-extensions\"\n#endif\n\n#include \"encoder/basisu_comp.h\"\n\nstruct BasisSettings\n{\n\tint etc1s_l;\n\tint etc1s_q;\n\tint uastc_l;\n\tfloat uastc_q;\n};\n\nstatic const BasisSettings kBasisSettings[10] = {\n {1, 1, 0, 4.f},\n {1, 32, 0, 3.f},\n {1, 64, 1, 2.f},\n {1, 96, 1, 1.5f},\n {1, 128, 1, 1.f}, // quality arguments aligned with basisu defaults\n {1, 150, 1, 0.8f},\n {1, 170, 1, 0.6f},\n {1, 192, 1, 0.4f}, // gltfpack defaults\n {1, 224, 2, 0.2f},\n {1, 255, 2, 0.f},\n};\n\nstatic void fillParams(basisu::basis_compressor_params& params, const char* input, const char* output, bool uastc, int width, int height, const BasisSettings& bs, const ImageInfo& info, const Settings& settings)\n{\n\tif (uastc)\n\t{\n\t\tstatic const uint32_t s_level_flags[basisu::TOTAL_PACK_UASTC_LEVELS] = {basisu::cPackUASTCLevelFastest, basisu::cPackUASTCLevelFaster, basisu::cPackUASTCLevelDefault, basisu::cPackUASTCLevelSlower, basisu::cPackUASTCLevelVerySlow};\n\n\t\tparams.m_uastc = true;\n\n#if BASISU_LIB_VERSION >= 160\n\t\tparams.m_pack_uastc_ldr_4x4_flags &= ~basisu::cPackUASTCLevelMask;\n\t\tparams.m_pack_uastc_ldr_4x4_flags |= s_level_flags[bs.uastc_l];\n\n\t\tparams.m_rdo_uastc_ldr_4x4 = bs.uastc_q > 0;\n\t\tparams.m_rdo_uastc_ldr_4x4_quality_scalar = bs.uastc_q;\n\t\tparams.m_rdo_uastc_ldr_4x4_dict_size = 1024;\n#else\n\t\tparams.m_pack_uastc_flags &= ~basisu::cPackUASTCLevelMask;\n\t\tparams.m_pack_uastc_flags |= s_level_flags[bs.uastc_l];\n\n\t\tparams.m_rdo_uastc = bs.uastc_q > 0;\n\t\tparams.m_rdo_uastc_quality_scalar = bs.uastc_q;\n\t\tparams.m_rdo_uastc_dict_size = 1024;\n#endif\n\t}\n\telse\n\t{\n#if BASISU_LIB_VERSION >= 200\n\t\tparams.m_etc1s_compression_level = bs.etc1s_l;\n\t\tparams.m_quality_level = bs.etc1s_q;\n\t\tparams.m_etc1s_max_endpoint_clusters = 0;\n\t\tparams.m_etc1s_max_selector_clusters = 0;\n#elif BASISU_LIB_VERSION >= 160\n\t\tparams.m_compression_level = bs.etc1s_l;\n\t\tparams.m_etc1s_quality_level = bs.etc1s_q;\n\t\tparams.m_etc1s_max_endpoint_clusters = 0;\n\t\tparams.m_etc1s_max_selector_clusters = 0;\n#else\n\t\tparams.m_compression_level = bs.etc1s_l;\n\t\tparams.m_quality_level = bs.etc1s_q;\n\t\tparams.m_max_endpoint_clusters = 0;\n\t\tparams.m_max_selector_clusters = 0;\n#endif\n\n\t\tparams.m_no_selector_rdo = info.normal_map;\n\t\tparams.m_no_endpoint_rdo = info.normal_map;\n\t}\n\n\tparams.m_perceptual = info.srgb;\n\n\tparams.m_mip_gen = true;\n\tparams.m_mip_srgb = info.srgb;\n\n\tparams.m_resample_width = width;\n\tparams.m_resample_height = height;\n\n\tparams.m_y_flip = settings.texture_flipy;\n\n\tparams.m_create_ktx2_file = true;\n\n#if BASISU_LIB_VERSION >= 200\n\tparams.m_ktx2_and_basis_srgb_transfer_function = info.srgb;\n#else\n\tparams.m_ktx2_srgb_transfer_func = info.srgb;\n#endif\n\n\tif (uastc)\n\t{\n\t\tparams.m_ktx2_uastc_supercompression = basist::KTX2_SS_ZSTANDARD;\n\t\tparams.m_ktx2_zstd_supercompression_level = 9;\n\t}\n\n\tparams.m_read_source_images = true;\n\n#if BASISU_LIB_VERSION >= 150\n\tparams.m_write_output_basis_or_ktx2_files = true;\n#else\n\tparams.m_write_output_basis_files = true;\n#endif\n\n\tparams.m_source_filenames.resize(1);\n\tparams.m_source_filenames[0] = input;\n\n\tparams.m_out_filename = output;\n\n\tparams.m_status_output = false;\n}\n\nstatic const char* prepareEncode(basisu::basis_compressor_params& params, const cgltf_image& image, const char* input_path, const ImageInfo& info, const Settings& settings, const std::string& temp_prefix, std::string& temp_input, std::string& temp_output)\n{\n\tstd::string img_data;\n\tstd::string mime_type;\n\n\tif (!readImage(image, input_path, img_data, mime_type))\n\t\treturn \"error reading source file\";\n\n\tif (mime_type != \"image/png\" && mime_type != \"image/jpeg\")\n\t\treturn NULL;\n\n\tint width = 0, height = 0;\n\tif (!getDimensions(img_data, mime_type.c_str(), width, height))\n\t\treturn \"error parsing image header\";\n\n\tadjustDimensions(width, height, settings.texture_scale[info.kind], settings.texture_limit[info.kind], settings.texture_pow2);\n\n\ttemp_input = temp_prefix + mimeExtension(mime_type.c_str());\n\ttemp_output = temp_prefix + \".ktx2\";\n\n\tif (!writeFile(temp_input.c_str(), img_data))\n\t\treturn \"error writing temporary file\";\n\n\tint quality = settings.texture_quality[info.kind];\n\tbool uastc = settings.texture_mode[info.kind] == TextureMode_UASTC;\n\n\tconst BasisSettings& bs = kBasisSettings[quality - 1];\n\n\tfillParams(params, temp_input.c_str(), temp_output.c_str(), uastc, width, height, bs, info, settings);\n\n\treturn NULL;\n}\n\nvoid encodeImagesBasis(std::string* encoded, const cgltf_data* data, const std::vector& images, const char* input_path, const Settings& settings)\n{\n\tbasisu::basisu_encoder_init();\n\n\tbasisu::vector params(data->images_count);\n\tbasisu::vector results(data->images_count);\n\n\tstd::string temp_prefix = getTempPrefix();\n\n\tstd::vector temp_inputs(data->images_count);\n\tstd::vector temp_outputs(data->images_count);\n\n\tfor (size_t i = 0; i < data->images_count; ++i)\n\t{\n\t\tconst cgltf_image& image = data->images[i];\n\t\tImageInfo info = images[i];\n\n\t\tif (settings.texture_mode[info.kind] == TextureMode_ETC1S || settings.texture_mode[info.kind] == TextureMode_UASTC)\n\t\t\tif (const char* error = prepareEncode(params[i], image, input_path, info, settings, temp_prefix + \"-\" + std::to_string(i), temp_inputs[i], temp_outputs[i]))\n\t\t\t\tencoded[i] = error;\n\t}\n\n\tuint32_t num_threads = settings.texture_jobs == 0 ? std::thread::hardware_concurrency() : settings.texture_jobs;\n\n\tbasisu::basis_parallel_compress(num_threads, params, results);\n\n\tfor (size_t i = 0; i < data->images_count; ++i)\n\t{\n\t\tif (params[i].m_source_filenames.empty())\n\t\t\t; // encoding was skipped or preparation resulted in an error\n\t\telse if (results[i].m_error_code == basisu::basis_compressor::cECFailedReadingSourceImages)\n\t\t\tencoded[i] = \"error decoding source image\";\n\t\telse if (results[i].m_error_code != basisu::basis_compressor::cECSuccess)\n\t\t\tencoded[i] = \"error encoding image\";\n\t\telse if (!readFile(temp_outputs[i].c_str(), encoded[i]))\n\t\t\tencoded[i] = \"error reading temporary file\";\n\t}\n\n\tfor (size_t i = 0; i < data->images_count; ++i)\n\t{\n\t\tif (!temp_inputs[i].empty())\n\t\t\tremoveFile(temp_inputs[i].c_str());\n\t\tif (!temp_outputs[i].empty())\n\t\t\tremoveFile(temp_outputs[i].c_str());\n\t}\n}\n#endif\n" }, { "path": "gltf/encodewebp.cpp", "content": "// This file is part of gltfpack; see gltfpack.h for version/license details\n#ifdef WITH_LIBWEBP\n#include \"gltfpack.h\"\n\n#include \"webp/decode.h\"\n#include \"webp/encode.h\"\n\n#ifndef WITH_LIBWEBP_BASIS\n#include \"imageio/image_dec.h\"\n#endif\n\n#include \n#include \n#include \n\nstatic int writeWebP(const uint8_t* data, size_t data_size, const WebPPicture* picture)\n{\n\tstd::string* encoded = static_cast(picture->custom_ptr);\n\tencoded->append(reinterpret_cast(data), data_size);\n\treturn 1;\n}\n\n// when gltfpack is built with Basis Universal, we have easy access to its jpeg/png decoders\n#ifdef WITH_LIBWEBP_BASIS\nnamespace pv_png\n{\nvoid* load_png(const void* pImage_buf, size_t buf_size, uint32_t desired_chans, uint32_t& width, uint32_t& height, uint32_t& num_chans);\n} // namespace pv_png\n\nnamespace jpgd\n{\nstatic const uint32_t cFlagLinearChromaFiltering = 1;\nunsigned char* decompress_jpeg_image_from_memory(const unsigned char* pSrc_data, int src_data_size, int* width, int* height, int* actual_comps, int req_comps, uint32_t flags = 0);\n} // namespace jpgd\n\ntypedef int (*WebPImageReader)(const uint8_t* const data, size_t data_size, struct WebPPicture* const pic, int keep_alpha, struct Metadata* const metadata);\n\nstatic int readPngBasis(const uint8_t* const data, size_t data_size, struct WebPPicture* const pic, int keep_alpha, struct Metadata* const metadata)\n{\n\t(void)keep_alpha;\n\t(void)metadata;\n\n\tuint32_t width = 0, height = 0, channels = 0;\n\tvoid* img = pv_png::load_png(data, data_size, 4, width, height, channels);\n\tif (!img)\n\t\treturn 0;\n\n\tpic->width = width;\n\tpic->height = height;\n\tint ok = WebPPictureImportRGBA(pic, static_cast(img), width * 4);\n\tfree(img);\n\treturn ok;\n}\n\nstatic int readJpegBasis(const uint8_t* const data, size_t data_size, struct WebPPicture* const pic, int keep_alpha, struct Metadata* const metadata)\n{\n\t(void)keep_alpha;\n\t(void)metadata;\n\n\tint width = 0, height = 0, channels = 0;\n\tunsigned char* img = jpgd::decompress_jpeg_image_from_memory(data, int(data_size), &width, &height, &channels, 4, jpgd::cFlagLinearChromaFiltering);\n\tif (!img)\n\t\treturn 0;\n\n\tpic->width = width;\n\tpic->height = height;\n\tint ok = WebPPictureImportRGBA(pic, img, width * 4);\n\tfree(img);\n\treturn ok;\n}\n#endif\n\nstatic const char* encodeWebP(const cgltf_image& image, const char* input_path, const ImageInfo& info, const Settings& settings, std::string& encoded)\n{\n\tWebPConfig config;\n\tif (!WebPConfigInit(&config))\n\t\treturn \"error initializing WebP\";\n\n\tstd::string img_data;\n\tstd::string mime_type;\n\n\tif (!readImage(image, input_path, img_data, mime_type))\n\t\treturn \"error reading source file\";\n\n\tif (mime_type != \"image/png\" && mime_type != \"image/jpeg\")\n\t\treturn NULL;\n\n\tint width = 0, height = 0;\n\tif (!getDimensions(img_data, mime_type.c_str(), width, height))\n\t\treturn \"error parsing image header\";\n\n\tadjustDimensions(width, height, settings.texture_scale[info.kind], settings.texture_limit[info.kind], settings.texture_pow2);\n\n#ifdef WITH_LIBWEBP_BASIS\n\tWebPImageReader reader = (mime_type == \"image/jpeg\") ? readJpegBasis : readPngBasis;\n#else\n\tWebPInputFileFormat format = (mime_type == \"image/jpeg\") ? WEBP_JPEG_FORMAT : WEBP_PNG_FORMAT;\n\tWebPImageReader reader = WebPGetImageReader(format);\n\tif (!reader)\n\t\treturn \"unsupported image format\";\n#endif\n\n\tWebPPicture pic;\n\tif (!WebPPictureInit(&pic))\n\t\treturn \"error initializing picture\";\n\n\tstd::unique_ptr pic_storage(&pic, WebPPictureFree);\n\n\tif (!reader(reinterpret_cast(img_data.data()), img_data.size(), &pic, 1, NULL))\n\t\treturn \"error decoding source image\";\n\n\tif ((width != pic.width || height != pic.height) && !WebPPictureRescale(&pic, width, height))\n\t\treturn \"error resizing image\";\n\n\tint quality = settings.texture_quality[info.kind];\n\n\tif (info.normal_map)\n\t\tconfig.quality = float(50 + quality * 5); // map 1-10 to 55-100\n\telse\n\t\tconfig.quality = float(20 + quality * 8); // map 1-10 to 28-100\n\n\tconfig.emulate_jpeg_size = 1; // for flatter quality curve\n\n\tpic.writer = writeWebP;\n\tpic.custom_ptr = &encoded;\n\tencoded.clear();\n\n\tif (!WebPEncode(&config, &pic))\n\t\treturn \"error encoding image\";\n\n\treturn NULL;\n}\n\nvoid encodeImagesWebP(std::string* encoded, const cgltf_data* data, const std::vector& images, const char* input_path, const Settings& settings)\n{\n\tstd::atomic next_image{0};\n\n\tauto encode = [&]()\n\t{\n\t\tfor (;;)\n\t\t{\n\t\t\tsize_t i = next_image++;\n\t\t\tif (i >= data->images_count)\n\t\t\t\tbreak;\n\n\t\t\tconst cgltf_image& image = data->images[i];\n\t\t\tImageInfo info = images[i];\n\n\t\t\tif (settings.texture_mode[info.kind] == TextureMode_WebP)\n\t\t\t\tif (const char* error = encodeWebP(image, input_path, info, settings, encoded[i]))\n\t\t\t\t\tencoded[i] = error;\n\t\t}\n\t};\n\n\t// we use main thread as a worker as well\n\tsize_t worker_count = settings.texture_jobs == 0 ? std::thread::hardware_concurrency() : settings.texture_jobs;\n\tsize_t thread_count = worker_count > 0 ? worker_count - 1 : 0;\n\n\tstd::vector threads;\n\tfor (size_t i = 0; i < thread_count; ++i)\n\t\tthreads.emplace_back(encode);\n\n\tencode();\n\n\tfor (size_t i = 0; i < thread_count; ++i)\n\t\tthreads[i].join();\n}\n\n#endif\n" }, { "path": "gltf/fileio.cpp", "content": "// This file is part of gltfpack; see gltfpack.h for version/license details\n#include \"gltfpack.h\"\n\n#include \n#include \n#include \n\n#ifdef _WIN32\n#include \n#else\n#include \n#endif\n\nstd::string getTempPrefix()\n{\n#if defined(_WIN32)\n\tconst char* temp_dir = getenv(\"TEMP\");\n\tstd::string path = temp_dir ? temp_dir : \".\";\n\tpath += \"\\\\gltfpack-temp\";\n\tpath += std::to_string(_getpid());\n\treturn path;\n#elif defined(__wasi__)\n\treturn \"gltfpack-temp\";\n#else\n\tstd::string path = \"/tmp/gltfpack-temp\";\n\tpath += std::to_string(getpid());\n\treturn path;\n#endif\n}\n\nstd::string getFullPath(const char* path, const char* base_path)\n{\n\tstd::string result = base_path;\n\n\tstd::string::size_type slash = result.find_last_of(\"/\\\\\");\n\tresult.erase(slash == std::string::npos ? 0 : slash + 1);\n\n\tresult += path;\n\n\treturn result;\n}\n\nstd::string getFileName(const char* path)\n{\n\tstd::string result = path;\n\n\tstd::string::size_type slash = result.find_last_of(\"/\\\\\");\n\tif (slash != std::string::npos)\n\t\tresult.erase(0, slash + 1);\n\n\tstd::string::size_type dot = result.find_last_of('.');\n\tif (dot != std::string::npos)\n\t\tresult.erase(dot);\n\n\treturn result;\n}\n\nstd::string getExtension(const char* path)\n{\n\tstd::string result = path;\n\n\tstd::string::size_type slash = result.find_last_of(\"/\\\\\");\n\tstd::string::size_type dot = result.find_last_of('.');\n\n\tif (slash != std::string::npos && dot != std::string::npos && dot < slash)\n\t\tdot = std::string::npos;\n\n\tresult.erase(0, dot);\n\n\tfor (size_t i = 0; i < result.length(); ++i)\n\t\tif (unsigned(result[i] - 'A') < 26)\n\t\t\tresult[i] = (result[i] - 'A') + 'a';\n\n\treturn result;\n}\n\nbool readFile(const char* path, std::string& data)\n{\n\tFILE* file = fopen(path, \"rb\");\n\tif (!file)\n\t\treturn false;\n\n\tfseek(file, 0, SEEK_END);\n\tlong length = ftell(file);\n\tfseek(file, 0, SEEK_SET);\n\n\tif (length <= 0)\n\t{\n\t\tfclose(file);\n\t\treturn false;\n\t}\n\n\tdata.resize(length);\n\tsize_t result = fread(&data[0], 1, data.size(), file);\n\tint rc = fclose(file);\n\n\treturn rc == 0 && result == data.size();\n}\n\nbool writeFile(const char* path, const std::string& data)\n{\n\tFILE* file = fopen(path, \"wb\");\n\tif (!file)\n\t\treturn false;\n\n\tsize_t result = fwrite(&data[0], 1, data.size(), file);\n\tint rc = fclose(file);\n\n\treturn rc == 0 && result == data.size();\n}\n\nvoid removeFile(const char* path)\n{\n\tremove(path);\n}\n" }, { "path": "gltf/fuzz.dict", "content": "#\n# AFL dictionary for JSON\n# -----------------------\n#\n# Just the very basics.\n#\n# Inspired by a dictionary by Jakub Wilk \n#\n\n\"0\"\n\",0\"\n\":0\"\n\"0:\"\n\"-1.2e+3\"\n\n\"true\"\n\"false\"\n\"null\"\n\n\"\\\"\\\"\"\n\",\\\"\\\"\"\n\":\\\"\\\"\"\n\"\\\"\\\":\"\n\n\"{}\"\n\",{}\"\n\":{}\"\n\"{\\\"\\\":0}\"\n\"{{}}\"\n\n\"[]\"\n\",[]\"\n\":[]\"\n\"[0]\"\n\"[[]]\"\n\n\"''\"\n\"\\\\\"\n\"\\\\b\"\n\"\\\\f\"\n\"\\\\n\"\n\"\\\\r\"\n\"\\\\t\"\n\"\\\\u0000\"\n\"\\\\x00\"\n\"\\\\0\"\n\"\\\\uD800\\\\uDC00\"\n\"\\\\uDBFF\\\\uDFFF\"\n\n\"\\\"\\\":0\"\n\"//\"\n\"/**/\"\n\n#\n# AFL dictionary for GLTF core\n# -----------------------\n\n\"5120\"\n\"5121\"\n\"5122\"\n\"5123\"\n\"5125\"\n\"5126\"\n\"\\\"BLEND\\\"\"\n\"\\\"CUBICSPLINE\\\"\"\n\"\\\"LINEAR\\\"\"\n\"\\\"MASK\\\"\"\n\"\\\"MAT2\\\"\"\n\"\\\"MAT3\\\"\"\n\"\\\"MAT4\\\"\"\n\"\\\"OPAQUE\\\"\"\n\"\\\"SCALAR\\\"\"\n\"\\\"STEP\\\"\"\n\"\\\"VEC2\\\"\"\n\"\\\"VEC3\\\"\"\n\"\\\"VEC4\\\"\"\n\"\\\"accessor\\\"\"\n\"\\\"accessors\\\"\"\n\"\\\"alphaCutoff\\\"\"\n\"\\\"alphaMode\\\"\"\n\"\\\"animations\\\"\"\n\"\\\"aspectRatio\\\"\"\n\"\\\"asset\\\"\"\n\"\\\"attributes\\\"\"\n\"\\\"baseColorFactor\\\"\"\n\"\\\"baseColorTexture\\\"\"\n\"\\\"bufferView\\\"\"\n\"\\\"bufferViews\\\"\"\n\"\\\"buffer\\\"\"\n\"\\\"buffers\\\"\"\n\"\\\"byteLength\\\"\"\n\"\\\"byteOffset\\\"\"\n\"\\\"byteStride\\\"\"\n\"\\\"camera\\\"\"\n\"\\\"cameras\\\"\"\n\"\\\"channel\\\"\"\n\"\\\"channels\\\"\"\n\"\\\"children\\\"\"\n\"\\\"componentType\\\"\"\n\"\\\"copyright\\\"\"\n\"\\\"count\\\"\"\n\"\\\"doubleSided\\\"\"\n\"\\\"emissiveFactor\\\"\"\n\"\\\"emissiveTexture\\\"\"\n\"\\\"extensionsRequired\\\"\"\n\"\\\"extensionsUsed\\\"\"\n\"\\\"extensions\\\"\"\n\"\\\"extras\\\"\"\n\"\\\"generator\\\"\"\n\"\\\"image\\\"\"\n\"\\\"images\\\"\"\n\"\\\"index\\\"\"\n\"\\\"indices\\\"\"\n\"\\\"input\\\"\"\n\"\\\"interpolation\\\"\"\n\"\\\"inverseBindMatrices\\\"\"\n\"\\\"joints\\\"\"\n\"\\\"magFilter\\\"\"\n\"\\\"material\\\"\"\n\"\\\"materials\\\"\"\n\"\\\"matrix\\\"\"\n\"\\\"max\\\"\"\n\"\\\"mesh\\\"\"\n\"\\\"meshes\\\"\"\n\"\\\"metallicFactor\\\"\"\n\"\\\"metallicRoughnessTexture\\\"\"\n\"\\\"mimeType\\\"\"\n\"\\\"minFilter\\\"\"\n\"\\\"minVersion\\\"\"\n\"\\\"min\\\"\"\n\"\\\"mode\\\"\"\n\"\\\"name\\\"\"\n\"\\\"node\\\"\"\n\"\\\"nodes\\\"\"\n\"\\\"normalTextureInfo\\\"\"\n\"\\\"normalTexture\\\"\"\n\"\\\"normalized\\\"\"\n\"\\\"occlusionTextureInfo\\\"\"\n\"\\\"occlusionTexture\\\"\"\n\"\\\"orthographic\\\"\"\n\"\\\"output\\\"\"\n\"\\\"path\\\"\"\n\"\\\"pbrMetallicRoughness\\\"\"\n\"\\\"perspective\\\"\"\n\"\\\"primitive\\\"\"\n\"\\\"primitives\\\"\"\n\"\\\"rotation\\\"\"\n\"\\\"roughnessFactor\\\"\"\n\"\\\"sampler\\\"\"\n\"\\\"samplers\\\"\"\n\"\\\"scale\\\"\"\n\"\\\"scene\\\"\"\n\"\\\"scenes\\\"\"\n\"\\\"skeleton\\\"\"\n\"\\\"skin\\\"\"\n\"\\\"skins\\\"\"\n\"\\\"source\\\"\"\n\"\\\"sparse\\\"\"\n\"\\\"strength\\\"\"\n\"\\\"target\\\"\"\n\"\\\"targets\\\"\"\n\"\\\"texCoord\\\"\"\n\"\\\"textureInfo\\\"\"\n\"\\\"texture\\\"\"\n\"\\\"textures\\\"\"\n\"\\\"translation\\\"\"\n\"\\\"type\\\"\"\n\"\\\"uri\\\"\"\n\"\\\"values\\\"\"\n\"\\\"version\\\"\"\n\"\\\"weights\\\"\"\n\"\\\"wrapS\\\"\"\n\"\\\"wrapT\\\"\"\n\"\\\"xmag\\\"\"\n\"\\\"yfov\\\"\"\n\"\\\"ymag\\\"\"\n\"\\\"zfar\\\"\"\n\"\\\"znear\\\"\"\n\n#\n# AFL dictionary for GLTF extensions\n# -----------------------\n\"\\\"KHR_materials_unlit\\\"\"\n\"\\\"KHR_texture_basisu\\\"\"\n\n\"\\\"KHR_materials_pbrSpecularGlossiness\\\"\"\n\"\\\"diffuseFactor\\\"\"\n\"\\\"diffuseTexture\\\"\"\n\"\\\"specularFactor\\\"\"\n\"\\\"glossinessFactor\\\"\"\n\"\\\"specularGlossinessTexture\\\"\"\n\n\"\\\"KHR_texture_transform\\\"\"\n\"\\\"offset\\\"\"\n\"\\\"rotation\\\"\"\n\"\\\"scale\\\"\"\n\"\\\"texCoord\\\"\"\n\n\"\\\"KHR_lights_punctual\\\"\"\n\"\\\"color\\\"\"\n\"\\\"intensity\\\"\"\n\"\\\"type\\\"\"\n\"\\\"range\\\"\"\n\"\\\"innerConeAngle\\\"\"\n\"\\\"outerConeAngle\\\"\"\n\n\"\\\"KHR_materials_transmission\\\"\"\n\"\\\"transmissionFactor\\\"\"\n\"\\\"transmissionTexture\\\"\"\n\n\"\\\"KHR_materials_volume\\\"\"\n\"\\\"thicknessFactor\\\"\"\n\"\\\"thicknessTexture\\\"\"\n\"\\\"attenuationColor\\\"\"\n\"\\\"attenuationDistance\\\"\"\n\n\"\\\"KHR_materials_sheen\\\"\"\n\"\\\"sheenColorFactor\\\"\"\n\"\\\"sheenColorTexture\\\"\"\n\"\\\"sheenRoughnessFactor\\\"\"\n\"\\\"sheenRoughnessTexture\\\"\"\n\n\"\\\"KHR_materials_emissive_strength\\\"\"\n\"\\\"emissiveStrength\"\\\"\"\n" }, { "path": "gltf/gltfpack.cpp", "content": "// This file is part of gltfpack; see gltfpack.h for version/license details\n#include \"gltfpack.h\"\n\n#include \n#include \n\n#include \n#include \n#include \n#include \n#include \n\n#ifdef __wasi__\n#include \n#endif\n\n#include \"../src/meshoptimizer.h\"\n\nstd::string getVersion()\n{\n\tchar result[32];\n\tsnprintf(result, sizeof(result), \"%d.%d\", MESHOPTIMIZER_VERSION / 1000, (MESHOPTIMIZER_VERSION % 1000) / 10);\n\treturn result;\n}\n\nstatic void finalizeBufferViews(std::string& json, std::vector& views, std::string& bin, std::string* fallback, size_t& fallback_size, const char* meshopt_ext, int attribute_level)\n{\n\tfor (size_t i = 0; i < views.size(); ++i)\n\t{\n\t\tBufferView& view = views[i];\n\n\t\tsize_t bin_offset = bin.size();\n\t\tsize_t fallback_offset = fallback_size;\n\n\t\tsize_t count = view.data.size() / view.stride;\n\n\t\tif (view.compression == BufferView::Compression_None)\n\t\t{\n\t\t\tbin += view.data;\n\t\t}\n\t\telse\n\t\t{\n\t\t\tswitch (view.compression)\n\t\t\t{\n\t\t\tcase BufferView::Compression_Attribute:\n\t\t\t\tcompressVertexStream(bin, view.data, count, view.stride, attribute_level);\n\t\t\t\tbreak;\n\t\t\tcase BufferView::Compression_Index:\n\t\t\t\tcompressIndexStream(bin, view.data, count, view.stride);\n\t\t\t\tbreak;\n\t\t\tcase BufferView::Compression_IndexSequence:\n\t\t\t\tcompressIndexSequence(bin, view.data, count, view.stride);\n\t\t\t\tbreak;\n\t\t\tdefault:\n\t\t\t\tassert(!\"Unknown compression type\");\n\t\t\t}\n\n\t\t\tif (fallback)\n\t\t\t\t*fallback += view.data;\n\t\t\tfallback_size += view.data.size();\n\t\t}\n\n\t\tsize_t raw_offset = (view.compression != BufferView::Compression_None) ? fallback_offset : bin_offset;\n\n\t\tcomma(json);\n\t\twriteBufferView(json, view.kind, view.filter, count, view.stride, raw_offset, view.data.size(), view.compression, bin_offset, bin.size() - bin_offset, meshopt_ext);\n\n\t\t// record written bytes for statistics\n\t\tview.bytes = bin.size() - bin_offset;\n\n\t\t// align each bufferView by 4 bytes\n\t\tbin.resize((bin.size() + 3) & ~3);\n\t\tif (fallback)\n\t\t\tfallback->resize((fallback->size() + 3) & ~3);\n\t\tfallback_size = (fallback_size + 3) & ~3;\n\t}\n}\n\nstatic void printMeshStats(const std::vector& meshes, const char* name)\n{\n\tsize_t mesh_triangles = 0;\n\tsize_t mesh_vertices = 0;\n\tsize_t total_triangles = 0;\n\tsize_t total_instances = 0;\n\tsize_t total_draws = 0;\n\n\tfor (size_t i = 0; i < meshes.size(); ++i)\n\t{\n\t\tconst Mesh& mesh = meshes[i];\n\n\t\tsize_t triangles = mesh.type == cgltf_primitive_type_triangles ? mesh.indices.size() / 3 : 0;\n\n\t\tmesh_triangles += triangles;\n\t\tmesh_vertices += mesh.streams.empty() ? 0 : mesh.streams[0].data.size();\n\n\t\tsize_t instances = std::max(size_t(1), mesh.nodes.size() + mesh.instances.size());\n\n\t\ttotal_triangles += triangles * instances;\n\t\ttotal_instances += instances;\n\t\ttotal_draws += std::max(size_t(1), mesh.nodes.size());\n\t}\n\n\tprintf(\"%s: %d mesh primitives (%d triangles, %d vertices); %d draw calls (%d instances, %lld triangles)\\n\", name,\n\t int(meshes.size()), int(mesh_triangles), int(mesh_vertices),\n\t int(total_draws), int(total_instances), (long long)total_triangles);\n}\n\nstatic void printSceneStats(const std::vector& views, const std::vector& meshes, size_t node_offset, size_t mesh_offset, size_t material_offset, size_t json_size, size_t bin_size)\n{\n\tsize_t bytes[BufferView::Kind_Count] = {};\n\n\tfor (size_t i = 0; i < views.size(); ++i)\n\t{\n\t\tconst BufferView& view = views[i];\n\t\tbytes[view.kind] += view.bytes;\n\t}\n\n\tprintf(\"output: %d nodes, %d meshes (%d primitives), %d materials\\n\", int(node_offset), int(mesh_offset), int(meshes.size()), int(material_offset));\n\tprintf(\"output: JSON %d bytes, buffers %d bytes\\n\", int(json_size), int(bin_size));\n\tprintf(\"output: buffers: vertex %d bytes, index %d bytes, skin %d bytes, time %d bytes, keyframe %d bytes, instance %d bytes, image %d bytes\\n\",\n\t int(bytes[BufferView::Kind_Vertex]), int(bytes[BufferView::Kind_Index]), int(bytes[BufferView::Kind_Skin]),\n\t int(bytes[BufferView::Kind_Time]), int(bytes[BufferView::Kind_Keyframe]), int(bytes[BufferView::Kind_Instance]),\n\t int(bytes[BufferView::Kind_Image]));\n}\n\nstatic void printAttributeStats(const std::vector& views, BufferView::Kind kind, const char* name)\n{\n\tfor (size_t i = 0; i < views.size(); ++i)\n\t{\n\t\tconst BufferView& view = views[i];\n\n\t\tif (view.kind != kind)\n\t\t\tcontinue;\n\n\t\tconst char* variant = \"unknown\";\n\n\t\tswitch (kind)\n\t\t{\n\t\tcase BufferView::Kind_Vertex:\n\t\t\tvariant = attributeType(cgltf_attribute_type(view.variant));\n\t\t\tbreak;\n\n\t\tcase BufferView::Kind_Index:\n\t\t\tvariant = \"index\";\n\t\t\tbreak;\n\n\t\tcase BufferView::Kind_Keyframe:\n\t\tcase BufferView::Kind_Instance:\n\t\t\tvariant = animationPath(cgltf_animation_path_type(view.variant));\n\t\t\tbreak;\n\n\t\tdefault:;\n\t\t}\n\n\t\tsize_t count = view.data.size() / view.stride;\n\n\t\tif (view.compression == BufferView::Compression_None)\n\t\t\tprintf(\"stats: %s %s: %d bytes (%.1f bits)\\n\",\n\t\t\t name, variant, int(view.bytes), double(view.bytes) / double(count) * 8);\n\t\telse\n\t\t\tprintf(\"stats: %s %s: compressed %d bytes (%.1f bits), raw %d bytes (%d bits)\\n\",\n\t\t\t name, variant,\n\t\t\t int(view.bytes), double(view.bytes) / double(count) * 8,\n\t\t\t int(view.data.size()), int(view.stride * 8));\n\t}\n}\n\nstatic void printImageStats(const std::vector& views, TextureKind kind, const char* name)\n{\n\tsize_t bytes = 0;\n\tsize_t count = 0;\n\n\tfor (size_t i = 0; i < views.size(); ++i)\n\t{\n\t\tconst BufferView& view = views[i];\n\n\t\tif (view.kind != BufferView::Kind_Image)\n\t\t\tcontinue;\n\n\t\tif (view.variant != -1 - kind)\n\t\t\tcontinue;\n\n\t\tcount += 1;\n\t\tbytes += view.data.size();\n\t}\n\n\tif (count)\n\t\tprintf(\"stats: image %s: %d bytes in %d images\\n\", name, int(bytes), int(count));\n}\n\nstatic bool printReport(const char* path, const std::vector& views, const std::vector& meshes, size_t node_count, size_t mesh_count, size_t texture_count, size_t material_count, size_t animation_count, size_t json_size, size_t bin_size)\n{\n\tsize_t bytes[BufferView::Kind_Count] = {};\n\n\tfor (size_t i = 0; i < views.size(); ++i)\n\t{\n\t\tconst BufferView& view = views[i];\n\t\tbytes[view.kind] += view.bytes;\n\t}\n\n\tsize_t total_triangles = 0;\n\tsize_t total_instances = 0;\n\tsize_t total_draws = 0;\n\n\tfor (size_t i = 0; i < meshes.size(); ++i)\n\t{\n\t\tconst Mesh& mesh = meshes[i];\n\n\t\tsize_t triangles = mesh.type == cgltf_primitive_type_triangles ? mesh.indices.size() / 3 : 0;\n\t\tsize_t instances = std::max(size_t(1), mesh.nodes.size() + mesh.instances.size());\n\n\t\ttotal_triangles += triangles * instances;\n\t\ttotal_instances += instances;\n\t\ttotal_draws += std::max(size_t(1), mesh.nodes.size());\n\t}\n\n\tFILE* out = fopen(path, \"wb\");\n\tif (!out)\n\t\treturn false;\n\n\tfprintf(out, \"{\\n\");\n\tfprintf(out, \"\\t\\\"generator\\\": \\\"gltfpack %s\\\",\\n\", getVersion().c_str());\n\tfprintf(out, \"\\t\\\"scene\\\": {\\n\");\n\tfprintf(out, \"\\t\\t\\\"nodeCount\\\": %d,\\n\", int(node_count));\n\tfprintf(out, \"\\t\\t\\\"meshCount\\\": %d,\\n\", int(mesh_count));\n\tfprintf(out, \"\\t\\t\\\"materialCount\\\": %d,\\n\", int(material_count));\n\tfprintf(out, \"\\t\\t\\\"textureCount\\\": %d,\\n\", int(texture_count));\n\tfprintf(out, \"\\t\\t\\\"animationCount\\\": %d\\n\", int(animation_count));\n\tfprintf(out, \"\\t},\\n\");\n\tfprintf(out, \"\\t\\\"render\\\": {\\n\");\n\tfprintf(out, \"\\t\\t\\\"drawCount\\\": %d,\\n\", int(total_draws));\n\tfprintf(out, \"\\t\\t\\\"instanceCount\\\": %d,\\n\", int(total_instances));\n\tfprintf(out, \"\\t\\t\\\"triangleCount\\\": %lld\\n\", (long long)total_triangles);\n\tfprintf(out, \"\\t},\\n\");\n\tfprintf(out, \"\\t\\\"data\\\": {\\n\");\n\tfprintf(out, \"\\t\\t\\\"json\\\": %d,\\n\", int(json_size));\n\tfprintf(out, \"\\t\\t\\\"binary\\\": %d,\\n\", int(bin_size));\n\tfprintf(out, \"\\t\\t\\\"buffers\\\": {\\n\");\n\tfprintf(out, \"\\t\\t\\t\\\"vertex\\\": %d,\\n\", int(bytes[BufferView::Kind_Vertex]));\n\tfprintf(out, \"\\t\\t\\t\\\"index\\\": %d,\\n\", int(bytes[BufferView::Kind_Index]));\n\tfprintf(out, \"\\t\\t\\t\\\"animation\\\": %d,\\n\", int(bytes[BufferView::Kind_Time] + bytes[BufferView::Kind_Keyframe]));\n\tfprintf(out, \"\\t\\t\\t\\\"transform\\\": %d,\\n\", int(bytes[BufferView::Kind_Skin] + bytes[BufferView::Kind_Instance]));\n\tfprintf(out, \"\\t\\t\\t\\\"image\\\": %d\\n\", int(bytes[BufferView::Kind_Image]));\n\tfprintf(out, \"\\t\\t}\\n\");\n\tfprintf(out, \"\\t}\\n\");\n\tfprintf(out, \"}\\n\");\n\n\tint rc = fclose(out);\n\treturn rc == 0;\n}\n\nstatic bool canTransformMesh(const Mesh& mesh)\n{\n\t// volume thickness is specified in mesh coordinate space; to avoid modifying materials we prohibit transforming meshes with volume materials\n\tif (mesh.material && mesh.material->has_volume && mesh.material->volume.thickness_factor > 0.f)\n\t\treturn false;\n\n\treturn true;\n}\n\nstatic void detachMesh(Mesh& mesh, cgltf_data* data, const std::vector& nodes, const Settings& settings)\n{\n\t// mesh is already instanced, skip\n\tif (!mesh.instances.empty())\n\t\treturn;\n\n\t// mesh is already world space, skip\n\tif (mesh.nodes.empty())\n\t\treturn;\n\n\t// note: when -kn is specified, we keep mesh-node attachment so that named nodes can be transformed\n\tif (settings.keep_nodes)\n\t\treturn;\n\n\t// we keep skinned meshes or meshes with morph targets as is\n\t// in theory we could transform both, but in practice transforming morph target meshes is more involved,\n\t// and reparenting skinned meshes leads to incorrect bounding box generated in three.js\n\tif (mesh.skin || mesh.targets)\n\t\treturn;\n\n\tbool any_animated = false;\n\tfor (size_t j = 0; j < mesh.nodes.size(); ++j)\n\t\tany_animated |= nodes[mesh.nodes[j] - data->nodes].animated;\n\n\t// animated meshes will be anchored to the same node that they used to be in to retain the animation\n\tif (any_animated)\n\t\treturn;\n\n\tint scene = nodes[mesh.nodes[0] - data->nodes].scene;\n\tbool any_other_scene = false;\n\tfor (size_t j = 0; j < mesh.nodes.size(); ++j)\n\t\tany_other_scene |= scene != nodes[mesh.nodes[j] - data->nodes].scene;\n\n\t// we only merge instances when all nodes have a single consistent scene\n\tif (scene < 0 || any_other_scene)\n\t\treturn;\n\n\t// we only merge multiple instances together if requested\n\t// this often makes the scenes faster to render by reducing the draw call count, but can result in larger files\n\tif (mesh.nodes.size() > 1 && !settings.mesh_merge && !settings.mesh_instancing)\n\t\treturn;\n\n\t// mesh has duplicate geometry; detaching it would increase the size due to unique world-space transforms\n\tif (mesh.nodes.size() == 1 && mesh.geometry_duplicate && !settings.mesh_merge)\n\t\treturn;\n\n\t// prefer instancing if possible, use merging otherwise\n\tif (mesh.nodes.size() > 1 && settings.mesh_instancing)\n\t{\n\t\tmesh.instances.resize(mesh.nodes.size());\n\n\t\tfor (size_t j = 0; j < mesh.nodes.size(); ++j)\n\t\t{\n\t\t\tInstance& obj = mesh.instances[j];\n\n\t\t\tcgltf_node_transform_world(mesh.nodes[j], obj.transform);\n\t\t\tobj.color[0] = obj.color[1] = obj.color[2] = obj.color[3] = 1.0f;\n\t\t}\n\n\t\tmesh.nodes.clear();\n\t\tmesh.scene = scene;\n\t}\n\telse if (canTransformMesh(mesh))\n\t{\n\t\tmergeMeshInstances(mesh);\n\n\t\tassert(mesh.nodes.empty());\n\t\tmesh.scene = scene;\n\t}\n}\n\nstatic bool isExtensionSupported(const ExtensionInfo* extensions, size_t count, const char* name)\n{\n\tfor (size_t i = 0; i < count; ++i)\n\t\tif (strcmp(extensions[i].name, name) == 0)\n\t\t\treturn true;\n\n\treturn false;\n}\n\nnamespace std\n{\ntemplate <>\nstruct hash >\n{\n\tsize_t operator()(const std::pair& x) const\n\t{\n\t\treturn std::hash()(x.first ^ x.second);\n\t}\n};\n} // namespace std\n\nstatic size_t process(cgltf_data* data, const char* input_path, const char* output_path, const char* report_path, std::vector& meshes, std::vector& animations, const Settings& settings, std::string& json, std::string& bin, std::string& fallback, size_t& fallback_size, const char* meshopt_ext)\n{\n\tif (settings.verbose)\n\t{\n\t\tprintf(\"input: %d nodes, %d meshes (%d primitives), %d materials, %d skins, %d animations, %d images\\n\",\n\t\t int(data->nodes_count), int(data->meshes_count), int(meshes.size()), int(data->materials_count), int(data->skins_count), int(animations.size()), int(data->images_count));\n\t\tprintMeshStats(meshes, \"input\");\n\t}\n\n\tfor (size_t i = 0; i < animations.size(); ++i)\n\t\tprocessAnimation(animations[i], settings);\n\n\tstd::vector nodes(data->nodes_count);\n\n\tmarkScenes(data, nodes);\n\tmarkAnimated(data, nodes, animations);\n\n\tmergeMeshMaterials(data, meshes, settings);\n\tif (settings.mesh_dedup)\n\t\tdedupMeshes(meshes, settings);\n\n\tfor (size_t i = 0; i < meshes.size(); ++i)\n\t\tdetachMesh(meshes[i], data, nodes, settings);\n\n\t// material information is required for mesh and image processing\n\tstd::vector materials(data->materials_count);\n\tstd::vector textures(data->textures_count);\n\tstd::vector images(data->images_count);\n\n\t// mark materials that need to keep blending due to mesh vertex colors\n\tfor (size_t i = 0; i < meshes.size(); ++i)\n\t{\n\t\tMesh& mesh = meshes[i];\n\n\t\t// skip hasAlpha check unless it's required\n\t\tif ((((mesh.material && mesh.material->alpha_mode != cgltf_alpha_mode_opaque) || mesh.variants.size()) && hasVertexAlpha(mesh)) || hasInstanceAlpha(mesh.instances))\n\t\t{\n\t\t\tif (mesh.material)\n\t\t\t\tmaterials[mesh.material - data->materials].mesh_alpha = true;\n\n\t\t\tfor (size_t j = 0; j < mesh.variants.size(); ++j)\n\t\t\t\tmaterials[mesh.variants[j].material - data->materials].mesh_alpha = true;\n\t\t}\n\t}\n\n\tanalyzeMaterials(data, materials, textures, images);\n\n\tmergeTextures(data, textures);\n\n\toptimizeMaterials(data, materials, images, input_path);\n\n\t// streams need to be filtered before mesh merging (or processing) to make sure we can merge meshes with redundant streams\n\tfor (size_t i = 0; i < meshes.size(); ++i)\n\t{\n\t\tMesh& mesh = meshes[i];\n\t\tMaterialInfo mi = mesh.material ? materials[mesh.material - data->materials] : MaterialInfo();\n\n\t\t// merge material requirements across all variants\n\t\tfor (size_t j = 0; j < mesh.variants.size(); ++j)\n\t\t{\n\t\t\tMaterialInfo vi = materials[mesh.variants[j].material - data->materials];\n\n\t\t\tmi.needs_tangents |= vi.needs_tangents;\n\t\t\tmi.texture_set_mask |= vi.texture_set_mask;\n\t\t\tmi.unlit &= vi.unlit;\n\t\t}\n\n\t\tif (!settings.keep_attributes)\n\t\t\tfilterStreams(mesh, mi);\n\t}\n\n\tmergeMeshes(meshes, settings);\n\tfilterEmptyMeshes(meshes);\n\n\tmarkNeededNodes(data, nodes, meshes, animations, settings);\n\tmarkNeededMaterials(data, materials, meshes, settings);\n\n\tif (settings.simplify_scaled && settings.simplify_ratio < 1)\n\t\tcomputeMeshQuality(meshes);\n\n\tfor (size_t i = 0; i < meshes.size(); ++i)\n\t{\n\t\tMesh& mesh = meshes[i];\n\t\tprocessMesh(mesh, settings);\n\n\t\tif (mesh.geometry_duplicate)\n\t\t\thashMesh(mesh);\n\t}\n\n\tfilterEmptyMeshes(meshes); // some meshes may become empty after processing\n\n\tQuantizationPosition qp = prepareQuantizationPosition(meshes, settings);\n\n\tstd::vector qt_materials(materials.size());\n\tstd::vector qt_meshes(meshes.size(), size_t(-1));\n\tprepareQuantizationTexture(data, qt_materials, qt_meshes, meshes, settings);\n\n\tQuantizationTexture qt_dummy = {};\n\tqt_dummy.bits = settings.tex_bits;\n\n\tstd::string json_images;\n\tstd::string json_samplers;\n\tstd::string json_textures;\n\tstd::string json_materials;\n\tstd::string json_accessors;\n\tstd::string json_meshes;\n\tstd::string json_nodes;\n\tstd::string json_skins;\n\tstd::vector json_roots(data->scenes_count);\n\tstd::string json_animations;\n\tstd::string json_cameras;\n\tstd::string json_extensions;\n\n\tstd::vector views;\n\n\tbool ext_pbr_specular_glossiness = false;\n\tbool ext_clearcoat = false;\n\tbool ext_transmission = false;\n\tbool ext_ior = false;\n\tbool ext_specular = false;\n\tbool ext_sheen = false;\n\tbool ext_volume = false;\n\tbool ext_emissive_strength = false;\n\tbool ext_iridescence = false;\n\tbool ext_anisotropy = false;\n\tbool ext_dispersion = false;\n\tbool ext_diffuse_transmission = false;\n\tbool ext_unlit = false;\n\tbool ext_instancing = false;\n\tbool ext_texture_transform = false;\n\tbool ext_texture_basisu = false;\n\tbool ext_texture_webp = false;\n\n\tsize_t accr_offset = 0;\n\tsize_t node_offset = 0;\n\tsize_t mesh_offset = 0;\n\tsize_t texture_offset = 0;\n\tsize_t material_offset = 0;\n\n\tfor (size_t i = 0; i < data->samplers_count; ++i)\n\t{\n\t\tconst cgltf_sampler& sampler = data->samplers[i];\n\n\t\tcomma(json_samplers);\n\t\tappend(json_samplers, \"{\");\n\t\twriteSampler(json_samplers, sampler);\n\t\tappend(json_samplers, \"}\");\n\t}\n\n\tstd::vector encoded_images(data->images_count);\n\n#ifdef WITH_BASISU\n\tif (data->images_count && settings.texture_ktx2)\n\t\tencodeImagesBasis(encoded_images.data(), data, images, input_path, settings);\n#endif\n\n#ifdef WITH_LIBWEBP\n\tif (data->images_count && settings.texture_webp)\n\t\tencodeImagesWebP(encoded_images.data(), data, images, input_path, settings);\n#endif\n\n\tfor (size_t i = 0; i < data->images_count; ++i)\n\t{\n\t\tconst cgltf_image& image = data->images[i];\n\n\t\tstd::string* encoded = !encoded_images[i].empty() ? &encoded_images[i] : NULL;\n\n\t\tcomma(json_images);\n\t\tappend(json_images, \"{\");\n\t\twriteImage(json_images, views, image, images[i], encoded, i, input_path, output_path, settings);\n\t\tappend(json_images, \"}\");\n\n\t\tif (encoded)\n\t\t\t*encoded = std::string(); // reclaim memory early\n\t}\n\n\tfor (size_t i = 0; i < data->textures_count; ++i)\n\t{\n\t\tconst cgltf_texture& texture = data->textures[i];\n\n\t\tif (!textures[i].keep)\n\t\t\tcontinue;\n\n\t\tcomma(json_textures);\n\t\tappend(json_textures, \"{\");\n\t\twriteTexture(json_textures, texture, texture.image ? &images[texture.image - data->images] : NULL, data, settings);\n\t\tappend(json_textures, \"}\");\n\n\t\tassert(textures[i].remap == int(texture_offset));\n\t\ttexture_offset++;\n\t\text_texture_basisu = ext_texture_basisu || texture.has_basisu;\n\t\text_texture_webp = ext_texture_webp || texture.has_webp;\n\t}\n\n\tfor (size_t i = 0; i < data->materials_count; ++i)\n\t{\n\t\tMaterialInfo& mi = materials[i];\n\n\t\tif (!mi.keep)\n\t\t\tcontinue;\n\n\t\tconst cgltf_material& material = data->materials[i];\n\n\t\tcomma(json_materials);\n\t\tappend(json_materials, \"{\");\n\t\twriteMaterial(json_materials, data, material, settings.quantize && !settings.pos_float ? &qp : NULL, settings.quantize && !settings.tex_float ? &qt_materials[i] : NULL, textures);\n\t\tif (settings.keep_extras)\n\t\t\twriteExtras(json_materials, material.extras);\n\t\tappend(json_materials, \"}\");\n\n\t\tmi.remap = int(material_offset);\n\t\tmaterial_offset++;\n\n\t\text_pbr_specular_glossiness = ext_pbr_specular_glossiness || material.has_pbr_specular_glossiness;\n\t\text_clearcoat = ext_clearcoat || material.has_clearcoat;\n\t\text_transmission = ext_transmission || material.has_transmission;\n\t\text_ior = ext_ior || material.has_ior;\n\t\text_specular = ext_specular || material.has_specular;\n\t\text_sheen = ext_sheen || material.has_sheen;\n\t\text_volume = ext_volume || material.has_volume;\n\t\text_emissive_strength = ext_emissive_strength || material.has_emissive_strength;\n\t\text_iridescence = ext_iridescence || material.has_iridescence;\n\t\text_diffuse_transmission = ext_diffuse_transmission || material.has_diffuse_transmission;\n\t\text_anisotropy = ext_anisotropy || material.has_anisotropy;\n\t\text_dispersion = ext_dispersion || material.has_dispersion;\n\t\text_unlit = ext_unlit || material.unlit;\n\t\text_texture_transform = ext_texture_transform || mi.uses_texture_transform;\n\t}\n\n\tstd::unordered_map, std::pair > primitive_cache;\n\n\tfor (size_t i = 0; i < meshes.size(); ++i)\n\t{\n\t\tconst Mesh& mesh = meshes[i];\n\n\t\tcomma(json_meshes);\n\t\tappend(json_meshes, \"{\\\"primitives\\\":[\");\n\n\t\tsize_t pi = i;\n\t\tfor (; pi < meshes.size(); ++pi)\n\t\t{\n\t\t\tconst Mesh& prim = meshes[pi];\n\n\t\t\tif (prim.scene != mesh.scene || prim.skin != mesh.skin || prim.targets != mesh.targets)\n\t\t\t\tbreak;\n\n\t\t\tif (pi > i && (mesh.instances.size() || prim.instances.size()))\n\t\t\t\tbreak;\n\n\t\t\tif (!compareMeshNodes(mesh, prim))\n\t\t\t\tbreak;\n\n\t\t\tif (!compareMeshTargets(mesh, prim))\n\t\t\t\tbreak;\n\n\t\t\tconst QuantizationTexture& qt = qt_meshes[pi] == size_t(-1) ? qt_dummy : qt_materials[qt_meshes[pi]];\n\n\t\t\tcomma(json_meshes);\n\n\t\t\tif (prim.geometry_duplicate)\n\t\t\t{\n\t\t\t\tstd::pair& primitive_json = primitive_cache[std::make_pair(prim.geometry_hash[0], prim.geometry_hash[1])];\n\n\t\t\t\tif (primitive_json.second)\n\t\t\t\t{\n\t\t\t\t\t// reuse previously written accessors\n\t\t\t\t\tjson_meshes.append(json_meshes, primitive_json.first, primitive_json.second);\n\t\t\t\t}\n\t\t\t\telse\n\t\t\t\t{\n\t\t\t\t\tprimitive_json.first = json_meshes.size();\n\t\t\t\t\twriteMeshGeometry(json_meshes, views, json_accessors, accr_offset, prim, qp, qt, settings);\n\t\t\t\t\tprimitive_json.second = json_meshes.size() - primitive_json.first;\n\t\t\t\t}\n\t\t\t}\n\t\t\telse\n\t\t\t{\n\t\t\t\twriteMeshGeometry(json_meshes, views, json_accessors, accr_offset, prim, qp, qt, settings);\n\t\t\t}\n\n\t\t\tif (prim.material)\n\t\t\t{\n\t\t\t\tMaterialInfo& mi = materials[prim.material - data->materials];\n\n\t\t\t\tassert(mi.keep);\n\t\t\t\tappend(json_meshes, \",\\\"material\\\":\");\n\t\t\t\tappend(json_meshes, size_t(mi.remap));\n\t\t\t}\n\n\t\t\tif (prim.variants.size())\n\t\t\t{\n\t\t\t\tappend(json_meshes, \",\\\"extensions\\\":{\\\"KHR_materials_variants\\\":{\\\"mappings\\\":[\");\n\n\t\t\t\tfor (size_t j = 0; j < prim.variants.size(); ++j)\n\t\t\t\t{\n\t\t\t\t\tconst cgltf_material_mapping& variant = prim.variants[j];\n\t\t\t\t\tMaterialInfo& mi = materials[variant.material - data->materials];\n\n\t\t\t\t\tassert(mi.keep);\n\t\t\t\t\tcomma(json_meshes);\n\t\t\t\t\tappend(json_meshes, \"{\\\"material\\\":\");\n\t\t\t\t\tappend(json_meshes, size_t(mi.remap));\n\t\t\t\t\tappend(json_meshes, \",\\\"variants\\\":[\");\n\t\t\t\t\tappend(json_meshes, size_t(variant.variant));\n\t\t\t\t\tappend(json_meshes, \"]}\");\n\t\t\t\t}\n\n\t\t\t\tappend(json_meshes, \"]}}\");\n\t\t\t}\n\n\t\t\tif (settings.keep_extras)\n\t\t\t\twriteExtras(json_meshes, prim.extras);\n\n\t\t\tappend(json_meshes, \"}\");\n\t\t}\n\n\t\tappend(json_meshes, \"]\");\n\n\t\tif (mesh.target_weights.size())\n\t\t{\n\t\t\tappend(json_meshes, \",\\\"weights\\\":\");\n\t\t\tappend(json_meshes, mesh.target_weights.data(), mesh.target_weights.size());\n\t\t}\n\n\t\tif (mesh.target_names.size())\n\t\t{\n\t\t\tappend(json_meshes, \",\\\"extras\\\":{\\\"targetNames\\\":[\");\n\t\t\tfor (size_t j = 0; j < mesh.target_names.size(); ++j)\n\t\t\t{\n\t\t\t\tcomma(json_meshes);\n\t\t\t\tappend(json_meshes, \"\\\"\");\n\t\t\t\tappend(json_meshes, mesh.target_names[j]);\n\t\t\t\tappend(json_meshes, \"\\\"\");\n\t\t\t}\n\t\t\tappend(json_meshes, \"]}\");\n\t\t}\n\n\t\tappend(json_meshes, \"}\");\n\n\t\tif (mesh.nodes.size())\n\t\t{\n\t\t\tfor (size_t j = 0; j < mesh.nodes.size(); ++j)\n\t\t\t{\n\t\t\t\tNodeInfo& ni = nodes[mesh.nodes[j] - data->nodes];\n\t\t\t\tassert(ni.keep);\n\n\t\t\t\t// if we don't use position quantization, prefer attaching the mesh to its node directly\n\t\t\t\tif (!ni.has_mesh && (!settings.quantize || settings.pos_float || (qp.offset[0] == 0.f && qp.offset[1] == 0.f && qp.offset[2] == 0 && qp.node_scale == 1.f)))\n\t\t\t\t{\n\t\t\t\t\tni.has_mesh = true;\n\t\t\t\t\tni.mesh_index = mesh_offset;\n\t\t\t\t\tni.mesh_skin = mesh.skin;\n\t\t\t\t}\n\t\t\t\telse\n\t\t\t\t{\n\t\t\t\t\tni.mesh_nodes.push_back(node_offset);\n\n\t\t\t\t\twriteMeshNode(json_nodes, mesh_offset, mesh.nodes[j], mesh.skin, data, settings.quantize && !settings.pos_float ? &qp : NULL);\n\n\t\t\t\t\tnode_offset++;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tif (mesh.instances.size())\n\t\t{\n\t\t\tassert(mesh.scene >= 0);\n\t\t\tcomma(json_roots[mesh.scene]);\n\t\t\tappend(json_roots[mesh.scene], node_offset);\n\n\t\t\tbool has_color = false;\n\t\t\tfor (const Instance& instance : mesh.instances)\n\t\t\t\thas_color |= (instance.color[0] != 1.f || instance.color[1] != 1.f || instance.color[2] != 1.f || instance.color[3] != 1.f);\n\n\t\t\tsize_t instance_accr = writeInstances(views, json_accessors, accr_offset, mesh.instances, qp, has_color, settings);\n\n\t\t\tassert(!mesh.skin);\n\t\t\twriteMeshNodeInstanced(json_nodes, mesh_offset, instance_accr, has_color);\n\n\t\t\tnode_offset++;\n\t\t}\n\n\t\tif (mesh.nodes.empty() && mesh.instances.empty())\n\t\t{\n\t\t\tassert(mesh.scene >= 0);\n\t\t\tcomma(json_roots[mesh.scene]);\n\t\t\tappend(json_roots[mesh.scene], node_offset);\n\n\t\t\twriteMeshNode(json_nodes, mesh_offset, NULL, mesh.skin, data, settings.quantize && !settings.pos_float ? &qp : NULL);\n\n\t\t\tnode_offset++;\n\t\t}\n\n\t\tmesh_offset++;\n\t\text_instancing = ext_instancing || !mesh.instances.empty();\n\n\t\t// skip all meshes that we've written in this iteration\n\t\tassert(pi > i);\n\t\ti = pi - 1;\n\t}\n\n\tremapNodes(data, nodes, node_offset);\n\n\tfor (size_t i = 0; i < data->nodes_count; ++i)\n\t{\n\t\tNodeInfo& ni = nodes[i];\n\n\t\tif (!ni.keep)\n\t\t\tcontinue;\n\n\t\tconst cgltf_node& node = data->nodes[i];\n\n\t\tcomma(json_nodes);\n\t\tappend(json_nodes, \"{\");\n\t\twriteNode(json_nodes, node, nodes, data);\n\t\tif (settings.keep_extras)\n\t\t\twriteExtras(json_nodes, node.extras);\n\t\tappend(json_nodes, \"}\");\n\t}\n\n\tfor (size_t i = 0; i < data->scenes_count; ++i)\n\t{\n\t\tfor (size_t j = 0; j < data->scenes[i].nodes_count; ++j)\n\t\t{\n\t\t\tNodeInfo& ni = nodes[data->scenes[i].nodes[j] - data->nodes];\n\n\t\t\tif (ni.keep)\n\t\t\t{\n\t\t\t\tcomma(json_roots[i]);\n\t\t\t\tappend(json_roots[i], size_t(ni.remap));\n\t\t\t}\n\t\t}\n\t}\n\n\tfor (size_t i = 0; i < data->skins_count; ++i)\n\t{\n\t\tconst cgltf_skin& skin = data->skins[i];\n\n\t\tsize_t matrix_accr = writeJointBindMatrices(views, json_accessors, accr_offset, skin, qp, settings);\n\n\t\twriteSkin(json_skins, skin, matrix_accr, nodes, data);\n\t}\n\n\tfor (size_t i = 0; i < animations.size(); ++i)\n\t{\n\t\tconst Animation& animation = animations[i];\n\n\t\twriteAnimation(json_animations, views, json_accessors, accr_offset, animation, i, data, nodes, settings);\n\t}\n\n\tfor (size_t i = 0; i < data->cameras_count; ++i)\n\t{\n\t\tconst cgltf_camera& camera = data->cameras[i];\n\n\t\twriteCamera(json_cameras, camera);\n\t}\n\n\tif (data->lights_count > 0)\n\t{\n\t\tcomma(json_extensions);\n\t\tappend(json_extensions, \"\\\"KHR_lights_punctual\\\":{\\\"lights\\\":[\");\n\n\t\tfor (size_t i = 0; i < data->lights_count; ++i)\n\t\t{\n\t\t\tconst cgltf_light& light = data->lights[i];\n\n\t\t\twriteLight(json_extensions, light);\n\t\t}\n\n\t\tappend(json_extensions, \"]}\");\n\t}\n\n\tif (data->variants_count > 0)\n\t{\n\t\tcomma(json_extensions);\n\t\tappend(json_extensions, \"\\\"KHR_materials_variants\\\":{\\\"variants\\\":[\");\n\n\t\tfor (size_t i = 0; i < data->variants_count; ++i)\n\t\t{\n\t\t\tconst cgltf_material_variant& variant = data->variants[i];\n\n\t\t\tcomma(json_extensions);\n\t\t\tappend(json_extensions, \"{\\\"name\\\":\\\"\");\n\t\t\tappend(json_extensions, variant.name);\n\t\t\tappend(json_extensions, \"\\\"}\");\n\t\t}\n\n\t\tappend(json_extensions, \"]}\");\n\t}\n\n\tappend(json, \"\\\"asset\\\":{\");\n\tappend(json, \"\\\"version\\\":\\\"2.0\\\",\\\"generator\\\":\\\"gltfpack \");\n\tappend(json, getVersion());\n\tappend(json, \"\\\"\");\n\twriteExtras(json, data->asset.extras);\n\tappend(json, \"}\");\n\n\tconst ExtensionInfo extensions[] = {\n\t {\"KHR_mesh_quantization\", settings.quantize, true},\n\t {meshopt_ext, settings.compress, !settings.fallback},\n\t {\"KHR_texture_transform\", (settings.quantize && !settings.tex_float && !json_textures.empty()) || ext_texture_transform, false},\n\t {\"KHR_materials_pbrSpecularGlossiness\", ext_pbr_specular_glossiness, false},\n\t {\"KHR_materials_clearcoat\", ext_clearcoat, false},\n\t {\"KHR_materials_transmission\", ext_transmission, false},\n\t {\"KHR_materials_ior\", ext_ior, false},\n\t {\"KHR_materials_specular\", ext_specular, false},\n\t {\"KHR_materials_sheen\", ext_sheen, false},\n\t {\"KHR_materials_volume\", ext_volume, false},\n\t {\"KHR_materials_emissive_strength\", ext_emissive_strength, false},\n\t {\"KHR_materials_iridescence\", ext_iridescence, false},\n\t {\"KHR_materials_anisotropy\", ext_anisotropy, false},\n\t {\"KHR_materials_dispersion\", ext_dispersion, false},\n\t {\"KHR_materials_diffuse_transmission\", ext_diffuse_transmission, false},\n\t {\"KHR_materials_unlit\", ext_unlit, false},\n\t {\"KHR_materials_variants\", data->variants_count > 0, false},\n\t {\"KHR_lights_punctual\", data->lights_count > 0, false},\n\t {\"KHR_texture_basisu\", (!json_textures.empty() && settings.texture_ktx2) || ext_texture_basisu, true},\n\t {\"EXT_texture_webp\", (!json_textures.empty() && settings.texture_webp) || ext_texture_webp, true},\n\t {\"EXT_mesh_gpu_instancing\", ext_instancing, true},\n\t};\n\n\tfor (size_t i = 0; i < data->extensions_required_count; ++i)\n\t{\n\t\tconst char* ext = data->extensions_required[i];\n\n\t\tif (!isExtensionSupported(extensions, sizeof(extensions) / sizeof(extensions[0]), ext) && strstr(ext, \"_meshopt_compression\") == NULL)\n\t\t\tfprintf(stderr, \"Warning: required extension %s is not supported and will be skipped\\n\", ext);\n\t}\n\n\twriteExtensions(json, extensions, sizeof(extensions) / sizeof(extensions[0]));\n\n\t// buffers[] array to be inserted by the caller\n\tsize_t bufferspec_pos = json.size();\n\n\tstd::string json_views;\n\tfinalizeBufferViews(json_views, views, bin, settings.fallback ? &fallback : NULL, fallback_size, meshopt_ext, settings.compresskhr ? (settings.compressmore ? 3 : 2) : 0);\n\n\twriteArray(json, \"bufferViews\", json_views);\n\twriteArray(json, \"accessors\", json_accessors);\n\twriteArray(json, \"samplers\", json_samplers);\n\twriteArray(json, \"images\", json_images);\n\twriteArray(json, \"textures\", json_textures);\n\twriteArray(json, \"materials\", json_materials);\n\twriteArray(json, \"meshes\", json_meshes);\n\twriteArray(json, \"skins\", json_skins);\n\twriteArray(json, \"animations\", json_animations);\n\twriteArray(json, \"nodes\", json_nodes);\n\n\tif (!json_roots.empty())\n\t{\n\t\tappend(json, \",\\\"scenes\\\":[\");\n\n\t\tfor (size_t i = 0; i < data->scenes_count; ++i)\n\t\t\twriteScene(json, data->scenes[i], json_roots[i], settings);\n\n\t\tappend(json, \"]\");\n\t}\n\n\twriteArray(json, \"cameras\", json_cameras);\n\n\tif (data->scene)\n\t{\n\t\tappend(json, \",\\\"scene\\\":\");\n\t\tappend(json, size_t(data->scene - data->scenes));\n\t}\n\n\tif (!json_extensions.empty())\n\t{\n\t\tappend(json, \",\\\"extensions\\\":{\");\n\t\tappend(json, json_extensions);\n\t\tappend(json, \"}\");\n\t}\n\n\tif (settings.verbose)\n\t{\n\t\tprintMeshStats(meshes, \"output\");\n\t\tprintSceneStats(views, meshes, node_offset, mesh_offset, material_offset, json.size(), bin.size());\n\t}\n\n\tif (settings.verbose > 1)\n\t{\n\t\tprintAttributeStats(views, BufferView::Kind_Vertex, \"vertex\");\n\t\tprintAttributeStats(views, BufferView::Kind_Index, \"index\");\n\t\tprintAttributeStats(views, BufferView::Kind_Keyframe, \"keyframe\");\n\t\tprintAttributeStats(views, BufferView::Kind_Instance, \"instance\");\n\n\t\tprintImageStats(views, TextureKind_Generic, \"generic\");\n\t\tprintImageStats(views, TextureKind_Color, \"color\");\n\t\tprintImageStats(views, TextureKind_Normal, \"normal\");\n\t\tprintImageStats(views, TextureKind_Attrib, \"attrib\");\n\t}\n\n\tif (report_path)\n\t{\n\t\tif (!printReport(report_path, views, meshes, node_offset, mesh_offset, texture_offset, material_offset, animations.size(), json.size(), bin.size()))\n\t\t{\n\t\t\tfprintf(stderr, \"Warning: cannot save report to %s\\n\", report_path);\n\t\t}\n\t}\n\n\treturn bufferspec_pos;\n}\n\nstatic void writeU32(FILE* out, uint32_t data)\n{\n\tfwrite(&data, 4, 1, out);\n}\n\nstatic const char* getBaseName(const char* path)\n{\n\tconst char* slash = strrchr(path, '/');\n\tconst char* backslash = strrchr(path, '\\\\');\n\n\tconst char* rs = slash ? slash + 1 : path;\n\tconst char* bs = backslash ? backslash + 1 : path;\n\n\treturn std::max(rs, bs);\n}\n\nstatic std::string getBufferSpec(const char* bin_path, size_t bin_size, const char* fallback_path, size_t fallback_size, bool fallback_ref, const char* meshopt_ext)\n{\n\tstd::string json;\n\tappend(json, \"\\\"buffers\\\":[\");\n\tappend(json, \"{\");\n\tif (bin_path)\n\t{\n\t\tappend(json, \"\\\"uri\\\":\\\"\");\n\t\tappend(json, bin_path);\n\t\tappend(json, \"\\\"\");\n\t}\n\tcomma(json);\n\tappend(json, \"\\\"byteLength\\\":\");\n\tappend(json, bin_size);\n\tappend(json, \"}\");\n\tif (fallback_ref)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"{\");\n\t\tif (fallback_path)\n\t\t{\n\t\t\tappend(json, \"\\\"uri\\\":\\\"\");\n\t\t\tappend(json, fallback_path);\n\t\t\tappend(json, \"\\\"\");\n\t\t}\n\t\tcomma(json);\n\t\tappend(json, \"\\\"byteLength\\\":\");\n\t\tappend(json, fallback_size);\n\t\tappend(json, \",\\\"extensions\\\":{\");\n\t\tappend(json, \"\\\"\");\n\t\tappend(json, meshopt_ext);\n\t\tappend(json, \"\\\":{\");\n\t\tappend(json, \"\\\"fallback\\\":true\");\n\t\tappend(json, \"}}\");\n\t\tappend(json, \"}\");\n\t}\n\tappend(json, \"]\");\n\n\treturn json;\n}\n\nint gltfpack(const char* input, const char* output, const char* report, Settings settings)\n{\n\tcgltf_data* data = NULL;\n\tstd::vector meshes;\n\tstd::vector animations;\n\n\tstd::string iext = getExtension(input);\n\tstd::string oext = output ? getExtension(output) : \"\";\n\n\tif (output)\n\t{\n\t\tif (oext != \".gltf\" && oext != \".glb\")\n\t\t{\n\t\t\tfprintf(stderr, \"Error: unsupported output extension '%s' (expected .gltf or .glb)\\n\", oext.c_str());\n\t\t\treturn 4;\n\t\t}\n\t}\n\n\tif (iext == \".gltf\" || iext == \".glb\")\n\t{\n\t\tconst char* error = NULL;\n\t\tdata = parseGltf(input, meshes, animations, &error);\n\n\t\tif (error)\n\t\t{\n\t\t\tfprintf(stderr, \"Error loading %s: %s\\n\", input, error);\n\t\t\treturn 2;\n\t\t}\n\t}\n\telse if (iext == \".obj\")\n\t{\n\t\tconst char* error = NULL;\n\t\tdata = parseObj(input, meshes, &error);\n\n\t\tif (!data)\n\t\t{\n\t\t\tfprintf(stderr, \"Error loading %s: %s\\n\", input, error);\n\t\t\treturn 2;\n\t\t}\n\t}\n\telse\n\t{\n\t\tfprintf(stderr, \"Error loading %s: unknown extension (expected .gltf or .glb or .obj)\\n\", input);\n\t\treturn 2;\n\t}\n\n#ifndef WITH_BASISU\n\tif (data->images_count && settings.texture_ktx2)\n\t{\n\t\tfprintf(stderr, \"Error: gltfpack was built without BasisU support, texture compression is not available\\n\");\n#ifdef __wasi__\n\t\tfprintf(stderr, \"Note: node.js builds do not support BasisU due to lack of platform features; download a native build from https://github.com/zeux/meshoptimizer/releases\\n\");\n#endif\n\t\treturn 3;\n\t}\n#endif\n\n#ifndef WITH_LIBWEBP\n\tif (data->images_count && settings.texture_webp)\n\t{\n\t\tfprintf(stderr, \"Error: gltfpack was built without WebP support, texture compression is not available\\n\");\n#ifdef __wasi__\n\t\tfprintf(stderr, \"Note: node.js builds do not support WebP due to lack of platform features; download a native build from https://github.com/zeux/meshoptimizer/releases\\n\");\n#endif\n\t\treturn 3;\n\t}\n#endif\n\n\tif (oext == \".glb\")\n\t{\n\t\tsettings.texture_embed = true;\n\t}\n\n\tif (data->images_count && !settings.texture_ref && !settings.texture_embed)\n\t{\n\t\tfor (size_t i = 0; i < data->images_count; ++i)\n\t\t{\n\t\t\tconst char* uri = data->images[i].uri;\n\t\t\tif (!uri || strncmp(uri, \"data:\", 5) == 0)\n\t\t\t\tcontinue;\n\n\t\t\tfor (size_t j = 0; j < i; ++j)\n\t\t\t{\n\t\t\t\tconst char* urj = data->images[j].uri;\n\t\t\t\tif (!urj || strncmp(urj, \"data:\", 5) == 0)\n\t\t\t\t\tcontinue;\n\n\t\t\t\tif (strcmp(uri, urj) != 0 && strcmp(getBaseName(uri), getBaseName(urj)) == 0)\n\t\t\t\t{\n\t\t\t\t\tfprintf(stderr, \"Warning: images %s and %s share the same base name and will overwrite each other\\n\", uri, urj);\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\tconst char* meshopt_ext = settings.compresskhr ? \"KHR_meshopt_compression\" : \"EXT_meshopt_compression\";\n\n\tstd::string json, bin, fallback;\n\tsize_t fallback_size = 0;\n\n\tjson += '{';\n\tsize_t bufferspec_pos = process(data, input, output, report, meshes, animations, settings, json, bin, fallback, fallback_size, meshopt_ext);\n\tjson += '}';\n\n\tcgltf_free(data);\n\n\tif (!output)\n\t{\n\t\treturn 0;\n\t}\n\n\tif (oext == \".gltf\")\n\t{\n\t\tstd::string binpath = output;\n\t\tbinpath.replace(binpath.size() - 5, 5, \".bin\");\n\n\t\tstd::string fbpath = output;\n\t\tfbpath.replace(fbpath.size() - 5, 5, \".fallback.bin\");\n\n\t\tFILE* outjson = fopen(output, \"wb\");\n\t\tFILE* outbin = fopen(binpath.c_str(), \"wb\");\n\t\tFILE* outfb = settings.fallback ? fopen(fbpath.c_str(), \"wb\") : NULL;\n\t\tif (!outjson || !outbin || (!outfb && settings.fallback))\n\t\t{\n\t\t\tfprintf(stderr, \"Error saving %s\\n\", output);\n\t\t\treturn 4;\n\t\t}\n\n\t\tstd::string bufferspec = getBufferSpec(getBaseName(binpath.c_str()), bin.size(), settings.fallback ? getBaseName(fbpath.c_str()) : NULL, fallback_size, settings.compress, meshopt_ext);\n\t\tjson.insert(bufferspec_pos, \",\" + bufferspec);\n\n\t\tfwrite(json.c_str(), json.size(), 1, outjson);\n\t\tfwrite(bin.c_str(), bin.size(), 1, outbin);\n\n\t\tif (settings.fallback)\n\t\t\tfwrite(fallback.c_str(), fallback.size(), 1, outfb);\n\n\t\tint rc = 0;\n\t\trc |= fclose(outjson);\n\t\trc |= fclose(outbin);\n\t\tif (outfb)\n\t\t\trc |= fclose(outfb);\n\n\t\tif (rc)\n\t\t{\n\t\t\tfprintf(stderr, \"Error saving %s\\n\", output);\n\t\t\treturn 4;\n\t\t}\n\t}\n\telse if (oext == \".glb\")\n\t{\n\t\tstd::string fbpath = output;\n\t\tfbpath.replace(fbpath.size() - 4, 4, \".fallback.bin\");\n\n\t\tFILE* out = fopen(output, \"wb\");\n\t\tFILE* outfb = settings.fallback ? fopen(fbpath.c_str(), \"wb\") : NULL;\n\t\tif (!out || (!outfb && settings.fallback))\n\t\t{\n\t\t\tfprintf(stderr, \"Error saving %s\\n\", output);\n\t\t\treturn 4;\n\t\t}\n\n\t\tstd::string bufferspec = getBufferSpec(NULL, bin.size(), settings.fallback ? getBaseName(fbpath.c_str()) : NULL, fallback_size, settings.compress, meshopt_ext);\n\t\tjson.insert(bufferspec_pos, \",\" + bufferspec);\n\n\t\twhile (json.size() % 4)\n\t\t\tjson.push_back(' ');\n\n\t\twhile (bin.size() % 4)\n\t\t\tbin.push_back('\\0');\n\n\t\twriteU32(out, 0x46546C67);\n\t\twriteU32(out, 2);\n\t\twriteU32(out, uint32_t(12 + 8 + json.size() + 8 + bin.size()));\n\n\t\twriteU32(out, uint32_t(json.size()));\n\t\twriteU32(out, 0x4E4F534A);\n\t\tfwrite(json.c_str(), json.size(), 1, out);\n\n\t\twriteU32(out, uint32_t(bin.size()));\n\t\twriteU32(out, 0x004E4942);\n\t\tfwrite(bin.c_str(), bin.size(), 1, out);\n\n\t\tif (settings.fallback)\n\t\t\tfwrite(fallback.c_str(), fallback.size(), 1, outfb);\n\n\t\tint rc = 0;\n\t\trc |= fclose(out);\n\t\tif (outfb)\n\t\t\trc |= fclose(outfb);\n\n\t\tif (rc)\n\t\t{\n\t\t\tfprintf(stderr, \"Error saving %s\\n\", output);\n\t\t\treturn 4;\n\t\t}\n\t}\n\telse\n\t{\n\t\tfprintf(stderr, \"Error saving %s: unknown extension (expected .gltf or .glb)\\n\", output);\n\t\treturn 4;\n\t}\n\n\treturn 0;\n}\n\nSettings defaults()\n{\n\tSettings settings = {};\n\tsettings.quantize = true;\n\tsettings.pos_bits = 14;\n\tsettings.tex_bits = 12;\n\tsettings.nrm_bits = 8;\n\tsettings.col_bits = 8;\n\tsettings.trn_bits = 16;\n\tsettings.rot_bits = 12;\n\tsettings.scl_bits = 16;\n\tsettings.anim_freq = 30;\n\tsettings.mesh_dedup = true;\n\tsettings.simplify_ratio = 1.f;\n\tsettings.simplify_error = 1e-2f;\n\tsettings.simplify_attributes = true;\n\tsettings.simplify_scaled = true;\n\n\tfor (int kind = 0; kind < TextureKind__Count; ++kind)\n\t{\n\t\tsettings.texture_mode[kind] = TextureMode_Raw;\n\t\tsettings.texture_scale[kind] = 1.f;\n\t\tsettings.texture_quality[kind] = 8;\n\t}\n\n\treturn settings;\n}\n\ntemplate \nT clamp(T v, T min, T max)\n{\n\treturn v < min ? min : (v > max ? max : v);\n}\n\nunsigned int textureMask(const char* arg)\n{\n\tunsigned int result = 0;\n\n\twhile (arg)\n\t{\n\t\tconst char* comma = strchr(arg, ',');\n\t\tsize_t seg = comma ? comma - arg - 1 : strlen(arg);\n\n\t\tif (strncmp(arg, \"color\", seg) == 0)\n\t\t\tresult |= 1 << TextureKind_Color;\n\t\telse if (strncmp(arg, \"normal\", seg) == 0)\n\t\t\tresult |= 1 << TextureKind_Normal;\n\t\telse if (strncmp(arg, \"attrib\", seg) == 0)\n\t\t\tresult |= 1 << TextureKind_Attrib;\n\t\telse\n\t\t\tfprintf(stderr, \"Warning: unrecognized texture class %.*s\\n\", int(seg), arg);\n\n\t\targ = comma ? comma + 1 : NULL;\n\t}\n\n\treturn result;\n}\n\ntemplate \nvoid applySetting(T (&data)[TextureKind__Count], T value, unsigned int mask = ~0u)\n{\n\tfor (int kind = 0; kind < TextureKind__Count; ++kind)\n\t\tif (mask & (1 << kind))\n\t\t\tdata[kind] = value;\n}\n\n#ifndef GLTFFUZZ\nint main(int argc, char** argv)\n{\n#ifndef __wasi__\n\tsetlocale(LC_ALL, \"C\"); // disable locale specific convention for number parsing/printing\n#endif\n\n\tmeshopt_encodeVertexVersion(0);\n\tmeshopt_encodeIndexVersion(1);\n\n\tSettings settings = defaults();\n\n\tconst char* input = NULL;\n\tconst char* output = NULL;\n\tconst char* report = NULL;\n\tbool help = false;\n\tbool test = false;\n\tbool require_texc = false;\n\n\tstd::vector testinputs;\n\n\tfor (int i = 1; i < argc; ++i)\n\t{\n\t\tconst char* arg = argv[i];\n\n\t\tif (strcmp(arg, \"-vp\") == 0 && i + 1 < argc && isdigit(argv[i + 1][0]))\n\t\t{\n\t\t\tsettings.pos_bits = clamp(atoi(argv[++i]), 1, 16);\n\t\t}\n\t\telse if (strcmp(arg, \"-vt\") == 0 && i + 1 < argc && isdigit(argv[i + 1][0]))\n\t\t{\n\t\t\tsettings.tex_bits = clamp(atoi(argv[++i]), 1, 16);\n\t\t}\n\t\telse if (strcmp(arg, \"-vn\") == 0 && i + 1 < argc && isdigit(argv[i + 1][0]))\n\t\t{\n\t\t\tsettings.nrm_bits = clamp(atoi(argv[++i]), 1, 16);\n\t\t}\n\t\telse if (strcmp(arg, \"-vc\") == 0 && i + 1 < argc && isdigit(argv[i + 1][0]))\n\t\t{\n\t\t\tsettings.col_bits = clamp(atoi(argv[++i]), 1, 16);\n\t\t}\n\t\telse if (strcmp(arg, \"-vpi\") == 0)\n\t\t{\n\t\t\tsettings.pos_float = false;\n\t\t\tsettings.pos_normalized = false;\n\t\t}\n\t\telse if (strcmp(arg, \"-vpn\") == 0)\n\t\t{\n\t\t\tsettings.pos_float = false;\n\t\t\tsettings.pos_normalized = true;\n\t\t}\n\t\telse if (strcmp(arg, \"-vpf\") == 0)\n\t\t{\n\t\t\tsettings.pos_float = true;\n\t\t}\n\t\telse if (strcmp(arg, \"-vtf\") == 0)\n\t\t{\n\t\t\tsettings.tex_float = true;\n\t\t}\n\t\telse if (strcmp(arg, \"-vnf\") == 0)\n\t\t{\n\t\t\tsettings.nrm_float = true;\n\t\t}\n\t\telse if (strcmp(arg, \"-vi\") == 0)\n\t\t{\n\t\t\tsettings.mesh_interleaved = true;\n\t\t}\n\t\telse if (strcmp(arg, \"-at\") == 0 && i + 1 < argc && isdigit(argv[i + 1][0]))\n\t\t{\n\t\t\tsettings.trn_bits = clamp(atoi(argv[++i]), 1, 24);\n\t\t}\n\t\telse if (strcmp(arg, \"-ar\") == 0 && i + 1 < argc && isdigit(argv[i + 1][0]))\n\t\t{\n\t\t\tsettings.rot_bits = clamp(atoi(argv[++i]), 4, 16);\n\t\t}\n\t\telse if (strcmp(arg, \"-as\") == 0 && i + 1 < argc && isdigit(argv[i + 1][0]))\n\t\t{\n\t\t\tsettings.scl_bits = clamp(atoi(argv[++i]), 1, 24);\n\t\t}\n\t\telse if (strcmp(arg, \"-af\") == 0 && i + 1 < argc && isdigit(argv[i + 1][0]))\n\t\t{\n\t\t\tsettings.anim_freq = clamp(atoi(argv[++i]), 0, 100);\n\t\t}\n\t\telse if (strcmp(arg, \"-ac\") == 0)\n\t\t{\n\t\t\tsettings.anim_const = true;\n\t\t}\n\t\telse if (strcmp(arg, \"-kn\") == 0)\n\t\t{\n\t\t\tsettings.keep_nodes = true;\n\t\t}\n\t\telse if (strcmp(arg, \"-km\") == 0)\n\t\t{\n\t\t\tsettings.keep_materials = true;\n\t\t}\n\t\telse if (strcmp(arg, \"-ke\") == 0)\n\t\t{\n\t\t\tsettings.keep_extras = true;\n\t\t}\n\t\telse if (strcmp(arg, \"-kv\") == 0)\n\t\t{\n\t\t\tsettings.keep_attributes = true;\n\t\t}\n\t\telse if (strcmp(arg, \"-mdd\") == 0)\n\t\t{\n\t\t\tfprintf(stderr, \"Warning: option -mdd disables mesh deduplication and is temporary; avoid production usage\\n\");\n\t\t\tsettings.mesh_dedup = false;\n\t\t}\n\t\telse if (strcmp(arg, \"-mm\") == 0)\n\t\t{\n\t\t\tsettings.mesh_merge = true;\n\t\t}\n\t\telse if (strcmp(arg, \"-mi\") == 0)\n\t\t{\n\t\t\tsettings.mesh_instancing = true;\n\t\t}\n\t\telse if (strcmp(arg, \"-si\") == 0 && i + 1 < argc && isdigit(argv[i + 1][0]))\n\t\t{\n\t\t\tsettings.simplify_ratio = clamp(float(atof(argv[++i])), 0.f, 1.f);\n\t\t}\n\t\telse if (strcmp(arg, \"-se\") == 0 && i + 1 < argc && isdigit(argv[i + 1][0]))\n\t\t{\n\t\t\tsettings.simplify_error = clamp(float(atof(argv[++i])), 0.f, 1.f);\n\t\t}\n\t\telse if (strcmp(arg, \"-sa\") == 0)\n\t\t{\n\t\t\tsettings.simplify_aggressive = true;\n\t\t}\n\t\telse if (strcmp(arg, \"-slb\") == 0)\n\t\t{\n\t\t\tsettings.simplify_lock_borders = true;\n\t\t}\n\t\telse if (strcmp(arg, \"-sv\") == 0)\n\t\t{\n\t\t\tfprintf(stderr, \"Warning: attribute aware simplification is enabled by default; option -sv is only provided for compatibility and may be removed in the future\\n\");\n\t\t}\n\t\telse if (strcmp(arg, \"-svd\") == 0)\n\t\t{\n\t\t\tfprintf(stderr, \"Warning: option -svd disables attribute aware simplification and is temporary; avoid production usage\\n\");\n\t\t\tsettings.simplify_attributes = false;\n\t\t}\n\t\telse if (strcmp(arg, \"-ssd\") == 0)\n\t\t{\n\t\t\tfprintf(stderr, \"Warning: option -ssd disables scaled simplification error and is temporary; avoid production usage\\n\");\n\t\t\tsettings.simplify_scaled = false;\n\t\t}\n\t\telse if (strcmp(arg, \"-sp\") == 0)\n\t\t{\n\t\t\tsettings.simplify_permissive = true;\n\t\t}\n\t\telse if (strcmp(arg, \"-tu\") == 0)\n\t\t{\n\t\t\tsettings.texture_ktx2 = true;\n\n\t\t\tunsigned int mask = ~0u;\n\t\t\tif (i + 1 < argc && isalpha(argv[i + 1][0]))\n\t\t\t\tmask = textureMask(argv[++i]);\n\n\t\t\tapplySetting(settings.texture_mode, TextureMode_UASTC, mask);\n\t\t}\n\t\telse if (strcmp(arg, \"-tc\") == 0)\n\t\t{\n\t\t\tsettings.texture_ktx2 = true;\n\n\t\t\tunsigned int mask = ~0u;\n\t\t\tif (i + 1 < argc && isalpha(argv[i + 1][0]))\n\t\t\t\tmask = textureMask(argv[++i]);\n\n\t\t\tapplySetting(settings.texture_mode, TextureMode_ETC1S, mask);\n\t\t}\n\t\telse if (strcmp(arg, \"-tw\") == 0)\n\t\t{\n\t\t\tsettings.texture_webp = true;\n\n\t\t\tunsigned int mask = ~0u;\n\t\t\tif (i + 1 < argc && isalpha(argv[i + 1][0]))\n\t\t\t\tmask = textureMask(argv[++i]);\n\n\t\t\tapplySetting(settings.texture_mode, TextureMode_WebP, mask);\n\t\t}\n\t\telse if (strcmp(arg, \"-tq\") == 0 && i + 1 < argc && isdigit(argv[i + 1][0]))\n\t\t{\n\t\t\trequire_texc = true;\n\n\t\t\tint quality = clamp(atoi(argv[++i]), 1, 10);\n\t\t\tapplySetting(settings.texture_quality, quality);\n\t\t}\n\t\telse if (strcmp(arg, \"-tq\") == 0 && i + 2 < argc && isalpha(argv[i + 1][0]) && isdigit(argv[i + 2][0]))\n\t\t{\n\t\t\trequire_texc = true;\n\n\t\t\tunsigned int mask = textureMask(argv[++i]);\n\t\t\tint quality = clamp(atoi(argv[++i]), 1, 10);\n\t\t\tapplySetting(settings.texture_quality, quality, mask);\n\t\t}\n\t\telse if (strcmp(arg, \"-ts\") == 0 && i + 1 < argc && isdigit(argv[i + 1][0]))\n\t\t{\n\t\t\trequire_texc = true;\n\n\t\t\tfloat scale = clamp(float(atof(argv[++i])), 0.f, 1.f);\n\t\t\tapplySetting(settings.texture_scale, scale);\n\t\t}\n\t\telse if (strcmp(arg, \"-ts\") == 0 && i + 2 < argc && isalpha(argv[i + 1][0]) && isdigit(argv[i + 2][0]))\n\t\t{\n\t\t\trequire_texc = true;\n\n\t\t\tunsigned int mask = textureMask(argv[++i]);\n\t\t\tfloat scale = clamp(float(atof(argv[++i])), 0.f, 1.f);\n\t\t\tapplySetting(settings.texture_scale, scale, mask);\n\t\t}\n\t\telse if (strcmp(arg, \"-tl\") == 0 && i + 1 < argc && isdigit(argv[i + 1][0]))\n\t\t{\n\t\t\trequire_texc = true;\n\n\t\t\tint limit = atoi(argv[++i]);\n\t\t\tapplySetting(settings.texture_limit, limit);\n\t\t}\n\t\telse if (strcmp(arg, \"-tl\") == 0 && i + 2 < argc && isalpha(argv[i + 1][0]) && isdigit(argv[i + 2][0]))\n\t\t{\n\t\t\trequire_texc = true;\n\n\t\t\tunsigned int mask = textureMask(argv[++i]);\n\t\t\tint limit = atoi(argv[++i]);\n\t\t\tapplySetting(settings.texture_limit, limit, mask);\n\t\t}\n\t\telse if (strcmp(arg, \"-tp\") == 0)\n\t\t{\n\t\t\trequire_texc = true;\n\n\t\t\tsettings.texture_pow2 = true;\n\t\t}\n\t\telse if (strcmp(arg, \"-tfy\") == 0)\n\t\t{\n\t\t\trequire_texc = true;\n\n\t\t\tsettings.texture_flipy = true;\n\t\t}\n\t\telse if (strcmp(arg, \"-tr\") == 0)\n\t\t{\n\t\t\tsettings.texture_ref = true;\n\t\t}\n\t\telse if (strcmp(arg, \"-tj\") == 0 && i + 1 < argc && isdigit(argv[i + 1][0]))\n\t\t{\n\t\t\tsettings.texture_jobs = clamp(atoi(argv[++i]), 0, 128);\n\t\t}\n\t\telse if (strcmp(arg, \"-noq\") == 0)\n\t\t{\n\t\t\t// TODO: Warn if -noq is used and suggest -vpf instead; use -noqq to silence\n\t\t\tsettings.quantize = false;\n\t\t}\n\t\telse if (strcmp(arg, \"-i\") == 0 && i + 1 < argc && !input)\n\t\t{\n\t\t\tinput = argv[++i];\n\t\t}\n\t\telse if (strcmp(arg, \"-o\") == 0 && i + 1 < argc && !output)\n\t\t{\n\t\t\toutput = argv[++i];\n\t\t}\n\t\telse if (strcmp(arg, \"-r\") == 0 && i + 1 < argc && !report)\n\t\t{\n\t\t\treport = argv[++i];\n\t\t}\n\t\telse if (strcmp(arg, \"-c\") == 0)\n\t\t{\n\t\t\tsettings.compress = true;\n\t\t}\n\t\telse if (strcmp(arg, \"-cc\") == 0)\n\t\t{\n\t\t\tsettings.compress = true;\n\t\t\tsettings.compressmore = true;\n\t\t}\n\t\telse if (strcmp(arg, \"-cf\") == 0)\n\t\t{\n\t\t\tsettings.compress = true;\n\t\t\tsettings.fallback = true;\n\t\t}\n\t\telse if (strcmp(arg, \"-cz\") == 0)\n\t\t{\n\t\t\tsettings.compress = true;\n\t\t\tsettings.compressmore = true;\n\t\t\tsettings.compresskhr = true;\n\t\t}\n\t\telse if (strcmp(arg, \"-ce\") == 0 && i + 1 < argc && (strcmp(argv[i + 1], \"khr\") == 0 || strcmp(argv[i + 1], \"ext\") == 0))\n\t\t{\n\t\t\tsettings.compress = true;\n\t\t\tsettings.compresskhr = strcmp(argv[++i], \"khr\") == 0;\n\t\t}\n\t\telse if (strcmp(arg, \"-v\") == 0)\n\t\t{\n\t\t\tsettings.verbose = 1;\n\t\t}\n\t\telse if (strcmp(arg, \"-vv\") == 0)\n\t\t{\n\t\t\tsettings.verbose = 2;\n\t\t}\n\t\telse if (strcmp(arg, \"-h\") == 0)\n\t\t{\n\t\t\thelp = true;\n\t\t}\n\t\telse if (strcmp(arg, \"-test\") == 0)\n\t\t{\n\t\t\ttest = true;\n\t\t}\n\t\telse if (arg[0] == '-')\n\t\t{\n\t\t\tfprintf(stderr, \"Unrecognized option %s\\n\", arg);\n\t\t\treturn 1;\n\t\t}\n\t\telse if (test)\n\t\t{\n\t\t\ttestinputs.push_back(arg);\n\t\t}\n\t\telse\n\t\t{\n\t\t\tfprintf(stderr, \"Expected option, got %s instead\\n\", arg);\n\t\t\treturn 1;\n\t\t}\n\t}\n\n\t// shortcut for gltfpack -v\n\tif (settings.verbose && argc == 2)\n\t{\n\t\tprintf(\"gltfpack %s\\n\", getVersion().c_str());\n\t\treturn 0;\n\t}\n\n\tif (test)\n\t{\n\t\tfor (size_t i = 0; i < testinputs.size(); ++i)\n\t\t{\n\t\t\tconst char* path = testinputs[i];\n\n\t\t\tprintf(\"%s\\n\", path);\n\t\t\tgltfpack(path, NULL, NULL, settings);\n\t\t}\n\n\t\treturn 0;\n\t}\n\n\tif (!input || !output || help)\n\t{\n\t\tfprintf(stderr, \"gltfpack %s\\n\", getVersion().c_str());\n\t\tfprintf(stderr, \"Usage: gltfpack [options] -i input -o output\\n\");\n\n\t\tif (help)\n\t\t{\n\t\t\tfprintf(stderr, \"\\nBasics:\\n\");\n\t\t\tfprintf(stderr, \"\\t-i file: input file to process, .obj/.gltf/.glb\\n\");\n\t\t\tfprintf(stderr, \"\\t-o file: output file path, .gltf/.glb\\n\");\n\t\t\tfprintf(stderr, \"\\t-c: produce compressed gltf/glb files (-cc/-cz for higher compression ratio)\\n\");\n\t\t\tfprintf(stderr, \"\\nTextures:\\n\");\n\t\t\tfprintf(stderr, \"\\t-tc: convert all textures to KTX2 with BasisU supercompression\\n\");\n\t\t\tfprintf(stderr, \"\\t-tu: use UASTC when encoding textures (much higher quality and much larger size)\\n\");\n\t\t\tfprintf(stderr, \"\\t-tw: convert all textures to WebP\\n\");\n\t\t\tfprintf(stderr, \"\\t-tq N: set texture encoding quality (default: 8; N should be between 1 and 10)\\n\");\n\t\t\tfprintf(stderr, \"\\t-ts R: scale texture dimensions by the ratio R (default: 1; R should be between 0 and 1)\\n\");\n\t\t\tfprintf(stderr, \"\\t-tl N: limit texture dimensions to N pixels (default: 0 = no limit)\\n\");\n\t\t\tfprintf(stderr, \"\\t-tp: resize textures to nearest power of 2 to conform to WebGL1 restrictions\\n\");\n\t\t\tfprintf(stderr, \"\\t-tfy: flip textures along Y axis during BasisU supercompression\\n\");\n\t\t\tfprintf(stderr, \"\\t-tj N: use N threads when compressing textures\\n\");\n\t\t\tfprintf(stderr, \"\\t-tr: keep referring to original texture paths instead of copying/embedding images\\n\");\n\t\t\tfprintf(stderr, \"\\tTexture classes:\\n\");\n\t\t\tfprintf(stderr, \"\\t-tc C: use ETC1S when encoding textures of class C\\n\");\n\t\t\tfprintf(stderr, \"\\t-tu C: use UASTC when encoding textures of class C\\n\");\n\t\t\tfprintf(stderr, \"\\t-tw C: use WebP when encoding textures of class C\\n\");\n\t\t\tfprintf(stderr, \"\\t-tq C N: set texture encoding quality for class C\\n\");\n\t\t\tfprintf(stderr, \"\\t-ts C R: scale texture dimensions for class C\\n\");\n\t\t\tfprintf(stderr, \"\\t-tl C N: limit texture dimensions for class C\\n\");\n\t\t\tfprintf(stderr, \"\\t... where C is a comma-separated list (no spaces) with valid values color,normal,attrib\\n\");\n\t\t\tfprintf(stderr, \"\\nSimplification:\\n\");\n\t\t\tfprintf(stderr, \"\\t-si R: simplify meshes targeting triangle/point count ratio R (default: 1; R should be between 0 and 1)\\n\");\n\t\t\tfprintf(stderr, \"\\t-se E: limit simplification error to E (default: 0.01 = 1%% deviation; E should be between 0 and 1)\\n\");\n\t\t\tfprintf(stderr, \"\\t-sp: use permissive simplification mode to allow simplification across attribute discontinuities\\n\");\n\t\t\tfprintf(stderr, \"\\t-sa: aggressively simplify to the target ratio disregarding quality\\n\");\n\t\t\tfprintf(stderr, \"\\t-slb: lock border vertices during simplification to avoid gaps on connected meshes\\n\");\n\t\t\tfprintf(stderr, \"\\nVertex precision:\\n\");\n\t\t\tfprintf(stderr, \"\\t-vp N: use N-bit quantization for positions (default: 14; N should be between 1 and 16)\\n\");\n\t\t\tfprintf(stderr, \"\\t-vt N: use N-bit quantization for texture coordinates (default: 12; N should be between 1 and 16)\\n\");\n\t\t\tfprintf(stderr, \"\\t-vn N: use N-bit quantization for normals (default: 8; N should be between 1 and 16) and tangents (up to 8-bit)\\n\");\n\t\t\tfprintf(stderr, \"\\t-vc N: use N-bit quantization for colors (default: 8; N should be between 1 and 16)\\n\");\n\t\t\tfprintf(stderr, \"\\nVertex positions:\\n\");\n\t\t\tfprintf(stderr, \"\\t-vpi: use integer attributes for positions (default)\\n\");\n\t\t\tfprintf(stderr, \"\\t-vpn: use normalized attributes for positions\\n\");\n\t\t\tfprintf(stderr, \"\\t-vpf: use floating point attributes for positions\\n\");\n\t\t\tfprintf(stderr, \"\\nVertex attributes:\\n\");\n\t\t\tfprintf(stderr, \"\\t-vtf: use floating point attributes for texture coordinates\\n\");\n\t\t\tfprintf(stderr, \"\\t-vnf: use floating point attributes for normals\\n\");\n\t\t\tfprintf(stderr, \"\\t-vi: use interleaved vertex attributes (reduces compression efficiency)\\n\");\n\t\t\tfprintf(stderr, \"\\t-kv: keep source vertex attributes even if they aren't used\\n\");\n\t\t\tfprintf(stderr, \"\\nAnimations:\\n\");\n\t\t\tfprintf(stderr, \"\\t-at N: use N-bit quantization for translations (default: 16; N should be between 1 and 24)\\n\");\n\t\t\tfprintf(stderr, \"\\t-ar N: use N-bit quantization for rotations (default: 12; N should be between 4 and 16)\\n\");\n\t\t\tfprintf(stderr, \"\\t-as N: use N-bit quantization for scale (default: 16; N should be between 1 and 24)\\n\");\n\t\t\tfprintf(stderr, \"\\t-af N: resample animations at N Hz (default: 30; use 0 to disable)\\n\");\n\t\t\tfprintf(stderr, \"\\t-ac: keep constant animation tracks even if they don't modify the node transform\\n\");\n\t\t\tfprintf(stderr, \"\\nScene:\\n\");\n\t\t\tfprintf(stderr, \"\\t-kn: keep named nodes and meshes attached to named nodes so that named nodes can be transformed externally\\n\");\n\t\t\tfprintf(stderr, \"\\t-km: keep named materials and disable named material merging\\n\");\n\t\t\tfprintf(stderr, \"\\t-ke: keep extras data\\n\");\n\t\t\tfprintf(stderr, \"\\t-mm: merge instances of the same mesh together when possible\\n\");\n\t\t\tfprintf(stderr, \"\\t-mi: use EXT_mesh_gpu_instancing when serializing multiple mesh instances\\n\");\n\t\t\tfprintf(stderr, \"\\nMiscellaneous:\\n\");\n\t\t\tfprintf(stderr, \"\\t-cf: produce compressed gltf/glb files with fallback for loaders that don't support compression\\n\");\n\t\t\tfprintf(stderr, \"\\t-ce ext|khr: use EXT or KHR version of meshopt compression extension for compression\\n\");\n\t\t\tfprintf(stderr, \"\\t-noq: disable quantization; produces much larger glTF files with no extensions\\n\");\n\t\t\tfprintf(stderr, \"\\t-v: verbose output (when used with other options)\\n\");\n\t\t\tfprintf(stderr, \"\\t-v: print version (when used without other options)\\n\");\n\t\t\tfprintf(stderr, \"\\t-r file: output a JSON report to file\\n\");\n\t\t\tfprintf(stderr, \"\\t-h: display this help and exit\\n\");\n\t\t}\n\t\telse\n\t\t{\n\t\t\tfprintf(stderr, \"\\nBasics:\\n\");\n\t\t\tfprintf(stderr, \"\\t-i file: input file to process, .obj/.gltf/.glb\\n\");\n\t\t\tfprintf(stderr, \"\\t-o file: output file path, .gltf/.glb\\n\");\n\t\t\tfprintf(stderr, \"\\t-c: produce compressed gltf/glb files (-cc/-cz for higher compression ratio)\\n\");\n\t\t\tfprintf(stderr, \"\\t-tc: convert all textures to KTX2 with BasisU supercompression\\n\");\n\t\t\tfprintf(stderr, \"\\t-tw: convert all textures to WebP\\n\");\n\t\t\tfprintf(stderr, \"\\t-si R: simplify meshes targeting triangle/point count ratio R (between 0 and 1)\\n\");\n\t\t\tfprintf(stderr, \"\\nRun gltfpack -h to display a full list of options\\n\");\n\t\t}\n\n\t\treturn 1;\n\t}\n\n\tif (require_texc && !settings.texture_ktx2 && !settings.texture_webp)\n\t{\n\t\tfprintf(stderr, \"Texture processing is only supported when texture compression is enabled via -tc/-tu/-tw\\n\");\n\t\treturn 1;\n\t}\n\n\tif (settings.texture_ref && (settings.texture_ktx2 || settings.texture_webp))\n\t{\n\t\tfprintf(stderr, \"Option -tr currently can not be used together with texture compression\\n\");\n\t\treturn 1;\n\t}\n\n\tif (settings.fallback && settings.compressmore)\n\t{\n\t\tfprintf(stderr, \"Option -cf can not be used together with -cc\\n\");\n\t\treturn 1;\n\t}\n\n\tif (settings.fallback && (settings.pos_float || settings.tex_float || settings.nrm_float))\n\t{\n\t\tfprintf(stderr, \"Option -cf can not be used together with -vpf, -vtf or -vnf\\n\");\n\t\treturn 1;\n\t}\n\n\tif (settings.keep_nodes && (settings.mesh_merge || settings.mesh_instancing))\n\t\tfprintf(stderr, \"Warning: option -kn disables mesh merge (-mm) and mesh instancing (-mi) optimizations\\n\");\n\n\treturn gltfpack(input, output, report, settings);\n}\n#endif\n\n#ifdef __wasi__\nextern \"C\" int pack(int argc, char** argv)\n{\n\tchdir(\"/gltfpack-$pwd\");\n\n\tint result = main(argc, argv);\n\tfflush(NULL);\n\treturn result;\n}\n#endif\n\n#ifdef GLTFFUZZ\nextern \"C\" int LLVMFuzzerTestOneInput(const uint8_t* buffer, size_t size)\n{\n\tSettings settings = defaults();\n\n\tsettings.texture_embed = true;\n\n\tstd::vector meshes;\n\tstd::vector animations;\n\n\tconst char* error = NULL;\n\tcgltf_data* data = parseGlb(buffer, size, meshes, animations, &error);\n\n\t// this is a difficult tradeoff\n\t// returning 0 on files that fail to parse means that fuzzing is more incremental: files with errors are put into the corpus,\n\t// and the subsequent mutations may lead to discovering more interesting inputs, including valid ones that are difficult to find otherwise.\n\t// however, this leads to most of the corpus being invalid, and we very rarely get useful coverage for actual gltfpack processing.\n\t// for now we just focus on valid files, as we expect cgltf parser itself to be bulletproof as it's fuzzed separately.\n\tif (error)\n\t\treturn -1;\n\n\tstd::string json, bin, fallback;\n\tsize_t fallback_size = 0;\n\tprocess(data, NULL, NULL, NULL, meshes, animations, settings, json, bin, fallback, fallback_size, NULL);\n\n\tcgltf_free(data);\n\n\treturn 0;\n}\n#endif\n" }, { "path": "gltf/gltfpack.h", "content": "/**\n * gltfpack - version 1.0\n *\n * Copyright (C) 2016-2026, by Arseny Kapoulkine (arseny.kapoulkine@gmail.com)\n * Report bugs and download new versions at https://github.com/zeux/meshoptimizer\n *\n * This application is distributed under the MIT License. See notice at the end of this file.\n */\n#pragma once\n\n#ifndef _CRT_SECURE_NO_WARNINGS\n#define _CRT_SECURE_NO_WARNINGS\n#endif\n\n#ifndef _CRT_NONSTDC_NO_WARNINGS\n#define _CRT_NONSTDC_NO_WARNINGS\n#endif\n\n#include \"../extern/cgltf.h\"\n\n#include \n\n#include \n#include \n\nstruct Attr\n{\n\tfloat f[4];\n};\n\nstruct Stream\n{\n\tcgltf_attribute_type type;\n\tint index;\n\tint target; // 0 = base mesh, 1+ = morph target\n\n\tconst char* custom_name; // only valid for cgltf_attribute_type_custom\n\n\tstd::vector data;\n};\n\nstruct Instance\n{\n\tfloat transform[16];\n\tfloat color[4];\n};\n\nstruct Mesh\n{\n\tint scene;\n\tstd::vector nodes;\n\tstd::vector instances;\n\n\tcgltf_material* material;\n\tcgltf_skin* skin;\n\n\tcgltf_extras extras;\n\n\tcgltf_primitive_type type;\n\n\tstd::vector streams;\n\tstd::vector indices;\n\n\tbool geometry_duplicate;\n\tuint64_t geometry_hash[2];\n\n\tsize_t targets;\n\tstd::vector target_weights;\n\tstd::vector target_names;\n\n\tstd::vector variants;\n\n\tfloat quality;\n};\n\nstruct Track\n{\n\tcgltf_node* node;\n\tcgltf_animation_path_type path;\n\n\tbool constant;\n\tbool dummy;\n\n\tsize_t components; // 1 unless path is cgltf_animation_path_type_weights\n\n\tcgltf_interpolation_type interpolation;\n\n\tstd::vector time; // empty for resampled or constant animations\n\tstd::vector data;\n};\n\nstruct Animation\n{\n\tconst char* name;\n\n\tfloat start;\n\tint frames;\n\n\tstd::vector tracks;\n};\n\nenum TextureKind\n{\n\tTextureKind_Generic,\n\tTextureKind_Color,\n\tTextureKind_Normal,\n\tTextureKind_Attrib,\n\n\tTextureKind__Count\n};\n\nenum TextureMode\n{\n\tTextureMode_Raw,\n\tTextureMode_ETC1S,\n\tTextureMode_UASTC,\n\tTextureMode_WebP,\n};\n\nstruct Settings\n{\n\tint pos_bits;\n\tint tex_bits;\n\tint nrm_bits;\n\tint col_bits;\n\n\tbool pos_normalized;\n\tbool pos_float;\n\tbool tex_float;\n\tbool nrm_float;\n\n\tint trn_bits;\n\tint rot_bits;\n\tint scl_bits;\n\n\tint anim_freq;\n\tbool anim_const;\n\n\tbool keep_nodes;\n\tbool keep_materials;\n\tbool keep_extras;\n\tbool keep_attributes;\n\n\tbool mesh_dedup;\n\tbool mesh_merge;\n\tbool mesh_instancing;\n\tbool mesh_interleaved;\n\n\tfloat simplify_ratio;\n\tfloat simplify_error;\n\tbool simplify_aggressive;\n\tbool simplify_lock_borders;\n\tbool simplify_attributes;\n\tbool simplify_scaled;\n\tbool simplify_permissive;\n\n\tbool texture_ktx2;\n\tbool texture_webp;\n\tbool texture_embed;\n\tbool texture_ref;\n\n\tbool texture_pow2;\n\tbool texture_flipy;\n\tfloat texture_scale[TextureKind__Count];\n\tint texture_limit[TextureKind__Count];\n\n\tTextureMode texture_mode[TextureKind__Count];\n\tint texture_quality[TextureKind__Count];\n\n\tint texture_jobs;\n\n\tbool quantize;\n\n\tbool compress;\n\tbool compressmore;\n\tbool compresskhr;\n\tbool fallback;\n\n\tint verbose;\n};\n\nstruct QuantizationPosition\n{\n\tfloat offset[3];\n\tfloat scale;\n\tint bits;\n\tbool normalized;\n\n\tfloat node_scale; // computed from scale/bits/normalized\n};\n\nstruct QuantizationTexture\n{\n\tfloat offset[2];\n\tfloat scale[2];\n\tint bits;\n\tbool normalized;\n};\n\nstruct StreamFormat\n{\n\tenum Filter\n\t{\n\t\tFilter_None,\n\t\tFilter_Oct,\n\t\tFilter_Quat,\n\t\tFilter_Exp,\n\t\tFilter_Color,\n\t};\n\n\tcgltf_type type;\n\tcgltf_component_type component_type;\n\tbool normalized;\n\tsize_t stride;\n\tFilter filter;\n};\n\nstruct NodeInfo\n{\n\tint scene;\n\n\tbool keep;\n\tbool animated;\n\n\tunsigned int animated_path_mask;\n\n\tint remap;\n\n\tstd::vector mesh_nodes;\n\n\tbool has_mesh;\n\tsize_t mesh_index;\n\tcgltf_skin* mesh_skin;\n};\n\nstruct MaterialInfo\n{\n\tbool keep;\n\n\tbool uses_texture_transform;\n\tbool needs_tangents;\n\tbool unlit;\n\tbool mesh_alpha;\n\n\tunsigned int texture_set_mask;\n\n\tint remap;\n};\n\nstruct TextureInfo\n{\n\tbool keep;\n\n\tint remap;\n};\n\nstruct ImageInfo\n{\n\tTextureKind kind;\n\tbool normal_map;\n\tbool srgb;\n\n\tint channels;\n};\n\nstruct ExtensionInfo\n{\n\tconst char* name;\n\n\tbool used;\n\tbool required;\n};\n\nstruct BufferView\n{\n\tenum Kind\n\t{\n\t\tKind_Vertex,\n\t\tKind_Index,\n\t\tKind_Skin,\n\t\tKind_Time,\n\t\tKind_Keyframe,\n\t\tKind_Instance,\n\t\tKind_Image,\n\t\tKind_Count\n\t};\n\n\tenum Compression\n\t{\n\t\tCompression_None = -1,\n\t\tCompression_Attribute,\n\t\tCompression_Index,\n\t\tCompression_IndexSequence,\n\t};\n\n\tKind kind;\n\tStreamFormat::Filter filter;\n\tCompression compression;\n\tsize_t stride;\n\tint variant;\n\n\tstd::string data;\n\n\tsize_t bytes;\n};\n\nstd::string getTempPrefix();\n\nstd::string getFullPath(const char* path, const char* base_path);\nstd::string getFileName(const char* path);\nstd::string getExtension(const char* path);\n\nbool readFile(const char* path, std::string& data);\nbool writeFile(const char* path, const std::string& data);\nvoid removeFile(const char* path);\n\ncgltf_data* parseObj(const char* path, std::vector& meshes, const char** error);\ncgltf_data* parseGltf(const char* path, std::vector& meshes, std::vector& animations, const char** error);\n\ncgltf_data* parseGlb(const void* buffer, size_t size, std::vector& meshes, std::vector& animations, const char** error);\n\nbool areExtrasEqual(const cgltf_extras& lhs, const cgltf_extras& rhs);\n\nvoid processAnimation(Animation& animation, const Settings& settings);\nvoid processMesh(Mesh& mesh, const Settings& settings);\n\nbool compareMeshTargets(const Mesh& lhs, const Mesh& rhs);\nbool compareMeshVariants(const Mesh& lhs, const Mesh& rhs);\nbool compareMeshNodes(const Mesh& lhs, const Mesh& rhs);\n\nvoid hashMesh(Mesh& mesh);\nvoid dedupMeshes(std::vector& meshes, const Settings& settings);\nvoid mergeMeshInstances(Mesh& mesh);\nvoid mergeMeshes(std::vector& meshes, const Settings& settings);\nvoid filterEmptyMeshes(std::vector& meshes);\nvoid filterStreams(Mesh& mesh, const MaterialInfo& mi);\n\nvoid mergeMeshMaterials(cgltf_data* data, std::vector& meshes, const Settings& settings);\nvoid markNeededMaterials(cgltf_data* data, std::vector& materials, const std::vector& meshes, const Settings& settings);\n\nvoid mergeTextures(cgltf_data* data, std::vector& textures);\n\nbool hasValidTransform(const cgltf_texture_view& view);\n\nvoid analyzeMaterials(cgltf_data* data, std::vector& materials, std::vector& textures, std::vector& images);\nvoid optimizeMaterials(cgltf_data* data, std::vector& materials, std::vector& images, const char* input_path);\n\nbool readImage(const cgltf_image& image, const char* input_path, std::string& data, std::string& mime_type);\nbool hasAlpha(const std::string& data, const char* mime_type);\nbool getDimensions(const std::string& data, const char* mime_type, int& width, int& height);\nvoid adjustDimensions(int& width, int& height, float scale, int limit, bool pow2);\nconst char* mimeExtension(const char* mime_type);\n\n#ifdef WITH_BASISU\nvoid encodeImagesBasis(std::string* encoded, const cgltf_data* data, const std::vector& images, const char* input_path, const Settings& settings);\n#endif\n\n#ifdef WITH_LIBWEBP\nvoid encodeImagesWebP(std::string* encoded, const cgltf_data* data, const std::vector& images, const char* input_path, const Settings& settings);\n#endif\n\nvoid markScenes(cgltf_data* data, std::vector& nodes);\nvoid markAnimated(cgltf_data* data, std::vector& nodes, const std::vector& animations);\nvoid markNeededNodes(cgltf_data* data, std::vector& nodes, const std::vector& meshes, const std::vector& animations, const Settings& settings);\nvoid remapNodes(cgltf_data* data, std::vector& nodes, size_t& node_offset);\nvoid decomposeTransform(float translation[3], float rotation[4], float scale[3], const float* transform);\n\nvoid computeMeshQuality(std::vector& meshes);\n\nbool hasVertexAlpha(const Mesh& mesh);\nbool hasInstanceAlpha(const std::vector& instances);\n\nQuantizationPosition prepareQuantizationPosition(const std::vector& meshes, const Settings& settings);\nvoid prepareQuantizationTexture(cgltf_data* data, std::vector& result, std::vector& indices, const std::vector& meshes, const Settings& settings);\nvoid getPositionBounds(float min[3], float max[3], const Stream& stream, const QuantizationPosition& qp, const Settings& settings);\n\nStreamFormat writeVertexStream(std::string& bin, const Stream& stream, const QuantizationPosition& qp, const QuantizationTexture& qt, const Settings& settings, bool filters = true);\nStreamFormat writeIndexStream(std::string& bin, const std::vector& stream);\nStreamFormat writeTimeStream(std::string& bin, const std::vector& data);\nStreamFormat writeKeyframeStream(std::string& bin, cgltf_animation_path_type type, const std::vector& data, const Settings& settings, bool has_tangents = false);\n\nvoid compressVertexStream(std::string& bin, const std::string& data, size_t count, size_t stride, int level);\nvoid compressIndexStream(std::string& bin, const std::string& data, size_t count, size_t stride);\nvoid compressIndexSequence(std::string& bin, const std::string& data, size_t count, size_t stride);\n\nsize_t getBufferView(std::vector& views, BufferView::Kind kind, StreamFormat::Filter filter, BufferView::Compression compression, size_t stride, int variant = 0);\n\nvoid comma(std::string& s);\nvoid append(std::string& s, size_t v);\nvoid append(std::string& s, float v);\nvoid append(std::string& s, const char* v);\nvoid append(std::string& s, const std::string& v);\nvoid append(std::string& s, const float* data, size_t count);\nvoid appendJson(std::string& s, const char* data);\n\nconst char* attributeType(cgltf_attribute_type type);\nconst char* animationPath(cgltf_animation_path_type type);\n\nvoid writeMaterial(std::string& json, const cgltf_data* data, const cgltf_material& material, const QuantizationPosition* qp, const QuantizationTexture* qt, std::vector& textures);\nvoid writeBufferView(std::string& json, BufferView::Kind kind, StreamFormat::Filter filter, size_t count, size_t stride, size_t bin_offset, size_t bin_size, BufferView::Compression compression, size_t compressed_offset, size_t compressed_size, const char* meshopt_ext);\nvoid writeSampler(std::string& json, const cgltf_sampler& sampler);\nvoid writeImage(std::string& json, std::vector& views, const cgltf_image& image, const ImageInfo& info, const std::string* encoded, size_t index, const char* input_path, const char* output_path, const Settings& settings);\nvoid writeTexture(std::string& json, const cgltf_texture& texture, const ImageInfo* info, cgltf_data* data, const Settings& settings);\nvoid writeMeshAttributes(std::string& json, std::vector& views, std::string& json_accessors, size_t& accr_offset, const Mesh& mesh, int target, const QuantizationPosition& qp, const QuantizationTexture& qt, const Settings& settings);\nsize_t writeMeshIndices(std::vector& views, std::string& json_accessors, size_t& accr_offset, const std::vector& indices, cgltf_primitive_type type, const Settings& settings);\nvoid writeMeshGeometry(std::string& json, std::vector& views, std::string& json_accessors, size_t& accr_offset, const Mesh& mesh, const QuantizationPosition& qp, const QuantizationTexture& qt, const Settings& settings);\nsize_t writeJointBindMatrices(std::vector& views, std::string& json_accessors, size_t& accr_offset, const cgltf_skin& skin, const QuantizationPosition& qp, const Settings& settings);\nsize_t writeInstances(std::vector& views, std::string& json_accessors, size_t& accr_offset, const std::vector& instances, const QuantizationPosition& qp, bool has_color, const Settings& settings);\nvoid writeMeshNode(std::string& json, size_t mesh_offset, cgltf_node* node, cgltf_skin* skin, cgltf_data* data, const QuantizationPosition* qp);\nvoid writeMeshNodeInstanced(std::string& json, size_t mesh_offset, size_t accr_offset, bool has_color);\nvoid writeSkin(std::string& json, const cgltf_skin& skin, size_t matrix_accr, const std::vector& nodes, cgltf_data* data);\nvoid writeNode(std::string& json, const cgltf_node& node, const std::vector& nodes, cgltf_data* data);\nvoid writeAnimation(std::string& json, std::vector& views, std::string& json_accessors, size_t& accr_offset, const Animation& animation, size_t i, cgltf_data* data, const std::vector& nodes, const Settings& settings);\nvoid writeCamera(std::string& json, const cgltf_camera& camera);\nvoid writeLight(std::string& json, const cgltf_light& light);\nvoid writeArray(std::string& json, const char* name, const std::string& contents);\nvoid writeExtensions(std::string& json, const ExtensionInfo* extensions, size_t count);\nvoid writeExtras(std::string& json, const cgltf_extras& extras);\nvoid writeScene(std::string& json, const cgltf_scene& scene, const std::string& roots, const Settings& settings);\n\n/**\n * Copyright (c) 2016-2026 Arseny Kapoulkine\n *\n * Permission is hereby granted, free of charge, to any person\n * obtaining a copy of this software and associated documentation\n * files (the \"Software\"), to deal in the Software without\n * restriction, including without limitation the rights to use,\n * copy, modify, merge, publish, distribute, sublicense, and/or sell\n * copies of the Software, and to permit persons to whom the\n * Software is furnished to do so, subject to the following\n * conditions:\n *\n * The above copyright notice and this permission notice shall be\n * included in all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND,\n * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES\n * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND\n * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT\n * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,\n * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR\n * OTHER DEALINGS IN THE SOFTWARE.\n */\n" }, { "path": "gltf/gltfpack.manifest", "content": "\n\n \n \n \n UTF-8\n \n \n\n" }, { "path": "gltf/image.cpp", "content": "// This file is part of gltfpack; see gltfpack.h for version/license details\n#include \"gltfpack.h\"\n\n#include \n#include \n\nstatic const char* kMimeTypes[][2] = {\n {\"image/jpeg\", \".jpg\"},\n {\"image/jpeg\", \".jpeg\"},\n {\"image/png\", \".png\"},\n {\"image/ktx2\", \".ktx2\"},\n {\"image/webp\", \".webp\"},\n};\n\nstatic const char* inferMimeType(const char* path)\n{\n\tstd::string ext = getExtension(path);\n\n\tfor (size_t i = 0; i < sizeof(kMimeTypes) / sizeof(kMimeTypes[0]); ++i)\n\t\tif (ext == kMimeTypes[i][1])\n\t\t\treturn kMimeTypes[i][0];\n\n\treturn \"\";\n}\n\nstatic bool parseDataUri(const char* uri, std::string& mime_type, std::string& result)\n{\n\tif (strncmp(uri, \"data:\", 5) == 0)\n\t{\n\t\tconst char* comma = strchr(uri, ',');\n\n\t\tif (comma && comma - uri >= 7 && strncmp(comma - 7, \";base64\", 7) == 0)\n\t\t{\n\t\t\tconst char* base64 = comma + 1;\n\t\t\tsize_t base64_size = strlen(base64);\n\t\t\tsize_t size = base64_size - base64_size / 4;\n\n\t\t\tif (base64_size >= 2)\n\t\t\t{\n\t\t\t\tsize -= base64[base64_size - 2] == '=';\n\t\t\t\tsize -= base64[base64_size - 1] == '=';\n\t\t\t}\n\n\t\t\tvoid* data = NULL;\n\n\t\t\tcgltf_options options = {};\n\t\t\tcgltf_result res = cgltf_load_buffer_base64(&options, size, base64, &data);\n\n\t\t\tif (res != cgltf_result_success)\n\t\t\t\treturn false;\n\n\t\t\tmime_type = std::string(uri + 5, comma - 7);\n\t\t\tresult = std::string(static_cast(data), size);\n\n\t\t\tfree(data);\n\n\t\t\treturn true;\n\t\t}\n\t}\n\n\treturn false;\n}\n\nstatic std::string fixupMimeType(const std::string& data, const std::string& mime_type)\n{\n\tif (mime_type == \"image/jpeg\" && data.compare(0, 8, \"\\x89\\x50\\x4e\\x47\\x0d\\x0a\\x1a\\x0a\") == 0)\n\t\treturn \"image/png\";\n\n\tif (mime_type == \"image/png\" && data.compare(0, 3, \"\\xff\\xd8\\xff\") == 0)\n\t\treturn \"image/jpeg\";\n\n\treturn mime_type;\n}\n\nbool readImage(const cgltf_image& image, const char* input_path, std::string& data, std::string& mime_type)\n{\n\tif (image.uri && parseDataUri(image.uri, mime_type, data))\n\t{\n\t\tmime_type = fixupMimeType(data, mime_type);\n\t\treturn true;\n\t}\n\telse if (image.buffer_view && image.buffer_view->buffer->data && image.mime_type)\n\t{\n\t\tconst cgltf_buffer_view* view = image.buffer_view;\n\n\t\tdata.assign(static_cast(view->buffer->data) + view->offset, view->size);\n\n\t\tmime_type = image.mime_type;\n\t\tmime_type = fixupMimeType(data, image.mime_type);\n\t\treturn true;\n\t}\n\telse if (image.uri && *image.uri && input_path)\n\t{\n\t\tstd::string path = image.uri;\n\n\t\tcgltf_decode_uri(&path[0]);\n\t\tpath.resize(strlen(&path[0]));\n\n\t\tif (!readFile(getFullPath(path.c_str(), input_path).c_str(), data))\n\t\t\treturn false;\n\n\t\tmime_type = image.mime_type ? image.mime_type : inferMimeType(path.c_str());\n\t\tmime_type = fixupMimeType(data, mime_type);\n\t\treturn true;\n\t}\n\telse\n\t{\n\t\treturn false;\n\t}\n}\n\nstatic int readInt16BE(const std::string& data, size_t offset)\n{\n\treturn (unsigned char)data[offset] * 256 + (unsigned char)data[offset + 1];\n}\n\nstatic int readInt32BE(const std::string& data, size_t offset)\n{\n\treturn (unsigned((unsigned char)data[offset]) << 24) |\n\t (unsigned((unsigned char)data[offset + 1]) << 16) |\n\t (unsigned((unsigned char)data[offset + 2]) << 8) |\n\t unsigned((unsigned char)data[offset + 3]);\n}\n\nstatic int readInt32LE(const std::string& data, size_t offset)\n{\n\treturn unsigned((unsigned char)data[offset]) |\n\t (unsigned((unsigned char)data[offset + 1]) << 8) |\n\t (unsigned((unsigned char)data[offset + 2]) << 16) |\n\t (unsigned((unsigned char)data[offset + 3]) << 24);\n}\n\n// https://en.wikipedia.org/wiki/PNG#File_format\nstatic bool getDimensionsPng(const std::string& data, int& width, int& height)\n{\n\tif (data.size() < 8 + 8 + 13 + 4)\n\t\treturn false;\n\n\tconst char* signature = \"\\x89\\x50\\x4e\\x47\\x0d\\x0a\\x1a\\x0a\";\n\tif (data.compare(0, 8, signature) != 0)\n\t\treturn false;\n\n\tif (data.compare(12, 4, \"IHDR\") != 0)\n\t\treturn false;\n\n\twidth = readInt32BE(data, 16);\n\theight = readInt32BE(data, 20);\n\n\treturn true;\n}\n\n// https://en.wikipedia.org/wiki/JPEG_File_Interchange_Format#File_format_structure\nstatic bool getDimensionsJpeg(const std::string& data, int& width, int& height)\n{\n\tsize_t offset = 0;\n\n\t// note, this can stop parsing before reaching the end but we stop at SOF anyway\n\twhile (offset + 4 <= data.size())\n\t{\n\t\tif (data[offset] != '\\xff')\n\t\t\treturn false;\n\n\t\tchar marker = data[offset + 1];\n\n\t\tif (marker == '\\xff')\n\t\t{\n\t\t\toffset++;\n\t\t\tcontinue; // padding\n\t\t}\n\n\t\t// d0..d9 correspond to SOI, RSTn, EOI\n\t\tif (marker == 0 || unsigned(marker - '\\xd0') <= 9)\n\t\t{\n\t\t\toffset += 2;\n\t\t\tcontinue; // no payload\n\t\t}\n\n\t\t// c0..c1 correspond to SOF0, SOF1\n\t\tif (marker == '\\xc0' || marker == '\\xc2')\n\t\t{\n\t\t\tif (offset + 10 > data.size())\n\t\t\t\treturn false;\n\n\t\t\twidth = readInt16BE(data, offset + 7);\n\t\t\theight = readInt16BE(data, offset + 5);\n\n\t\t\treturn true;\n\t\t}\n\n\t\toffset += 2 + readInt16BE(data, offset + 2);\n\t}\n\n\treturn false;\n}\n\n// https://en.wikipedia.org/wiki/PNG#File_format\nstatic bool hasTransparencyPng(const std::string& data)\n{\n\tif (data.size() < 8 + 8 + 13 + 4)\n\t\treturn false;\n\n\tconst char* signature = \"\\x89\\x50\\x4e\\x47\\x0d\\x0a\\x1a\\x0a\";\n\tif (data.compare(0, 8, signature) != 0)\n\t\treturn false;\n\n\tif (data.compare(12, 4, \"IHDR\") != 0)\n\t\treturn false;\n\n\tint ctype = data[25];\n\n\tif (ctype != 3)\n\t\treturn ctype == 4 || ctype == 6;\n\n\tsize_t offset = 8; // reparse IHDR chunk for simplicity\n\n\twhile (offset + 12 <= data.size())\n\t{\n\t\tint length = readInt32BE(data, offset);\n\n\t\tif (length < 0)\n\t\t\treturn false;\n\n\t\tif (data.compare(offset + 4, 4, \"tRNS\") == 0)\n\t\t\treturn true;\n\n\t\toffset += 12 + length;\n\t}\n\n\treturn false;\n}\n\n// https://github.khronos.org/KTX-Specification/ktxspec.v2.html\nstatic bool hasTransparencyKtx2(const std::string& data)\n{\n\tif (data.size() < 12 + 17 * 4)\n\t\treturn false;\n\n\tconst char* signature = \"\\xabKTX 20\\xbb\\r\\n\\x1a\\n\";\n\tif (data.compare(0, 12, signature) != 0)\n\t\treturn false;\n\n\tint dfdOffset = readInt32LE(data, 48);\n\tint dfdLength = readInt32LE(data, 52);\n\n\tif (dfdLength < 4 + 24 + 16 || unsigned(dfdOffset) > data.size() || unsigned(dfdLength) > data.size() - dfdOffset)\n\t\treturn false;\n\n\tconst int KDF_DF_MODEL_ETC1S = 163;\n\tconst int KDF_DF_MODEL_UASTC = 166;\n\tconst int KHR_DF_CHANNEL_UASTC_RGBA = 3;\n\tconst int KHR_DF_CHANNEL_ETC1S_RGB = 0;\n\tconst int KHR_DF_CHANNEL_ETC1S_AAA = 15;\n\n\tint colorModel = readInt32LE(data, dfdOffset + 12) & 0xff;\n\tint channelType1 = (readInt32LE(data, dfdOffset + 28) >> 24) & 0xf;\n\tint channelType2 = dfdLength >= 4 + 24 + 16 * 2 ? (readInt32LE(data, dfdOffset + 44) >> 24) & 0xf : channelType1;\n\n\tif (colorModel == KDF_DF_MODEL_ETC1S)\n\t{\n\t\treturn channelType1 == KHR_DF_CHANNEL_ETC1S_RGB && channelType2 == KHR_DF_CHANNEL_ETC1S_AAA;\n\t}\n\telse if (colorModel == KDF_DF_MODEL_UASTC)\n\t{\n\t\treturn channelType1 == KHR_DF_CHANNEL_UASTC_RGBA;\n\t}\n\n\treturn false;\n}\n\n// https://developers.google.com/speed/webp/docs/riff_container\nstatic bool hasTransparencyWebP(const std::string& data)\n{\n\tif (data.size() < 12 + 4 + 12)\n\t\treturn false;\n\n\tif (data.compare(0, 4, \"RIFF\") != 0)\n\t\treturn false;\n\tif (data.compare(8, 4, \"WEBP\") != 0)\n\t\treturn false;\n\n\t// WebP data may use VP8L, VP8X or VP8 format, but VP8 does not support transparency\n\tif (data.compare(12, 4, \"VP8L\") == 0)\n\t{\n\t\tif (unsigned(data[20]) != 0x2f)\n\t\t\treturn false;\n\n\t\t// width (14) | height (14) | alpha_is_used (1) | version_number(3)\n\t\tunsigned int header = readInt32LE(data, 21);\n\t\treturn (header & (1 << 28)) != 0;\n\t}\n\telse if (data.compare(12, 4, \"VP8X\") == 0)\n\t{\n\t\t// zero (2) | icc (1) | alpha (1) | exif (1) | xmp (1) | animation (1) | zero (1)\n\t\tunsigned char header = data[20];\n\t\treturn (header & (1 << 4)) != 0;\n\t}\n\n\treturn false;\n}\n\nbool hasAlpha(const std::string& data, const char* mime_type)\n{\n\tif (strcmp(mime_type, \"image/png\") == 0)\n\t\treturn hasTransparencyPng(data);\n\telse if (strcmp(mime_type, \"image/ktx2\") == 0)\n\t\treturn hasTransparencyKtx2(data);\n\telse if (strcmp(mime_type, \"image/webp\") == 0)\n\t\treturn hasTransparencyWebP(data);\n\telse\n\t\treturn false;\n}\n\nbool getDimensions(const std::string& data, const char* mime_type, int& width, int& height)\n{\n\tif (strcmp(mime_type, \"image/png\") == 0)\n\t\treturn getDimensionsPng(data, width, height);\n\tif (strcmp(mime_type, \"image/jpeg\") == 0)\n\t\treturn getDimensionsJpeg(data, width, height);\n\n\treturn false;\n}\n\nstatic int roundPow2(int value)\n{\n\tint result = 1;\n\n\twhile (result < value)\n\t\tresult <<= 1;\n\n\t// to prevent odd texture sizes from increasing the size too much, we round to nearest power of 2 above a certain size\n\tif (value > 128 && result * 3 / 4 > value)\n\t\tresult >>= 1;\n\n\treturn result;\n}\n\nstatic int roundBlock(int value, bool pow2)\n{\n\tif (value == 0)\n\t\treturn 4;\n\n\tif (pow2 && value > 4)\n\t\treturn roundPow2(value);\n\n\treturn (value + 3) & ~3;\n}\n\nvoid adjustDimensions(int& width, int& height, float scale, int limit, bool pow2)\n{\n\twidth = int(width * scale);\n\theight = int(height * scale);\n\n\tif (limit && (width > limit || height > limit))\n\t{\n\t\tfloat limit_scale = float(limit) / float(width > height ? width : height);\n\n\t\twidth = int(width * limit_scale);\n\t\theight = int(height * limit_scale);\n\t}\n\n\twidth = roundBlock(width, pow2);\n\theight = roundBlock(height, pow2);\n}\n\nconst char* mimeExtension(const char* mime_type)\n{\n\tfor (size_t i = 0; i < sizeof(kMimeTypes) / sizeof(kMimeTypes[0]); ++i)\n\t\tif (strcmp(kMimeTypes[i][0], mime_type) == 0)\n\t\t\treturn kMimeTypes[i][1];\n\n\treturn \".raw\";\n}\n" }, { "path": "gltf/json.cpp", "content": "// This file is part of gltfpack; see gltfpack.h for version/license details\n#include \"gltfpack.h\"\n\n#include \n#include \n#include \n\nvoid comma(std::string& s)\n{\n\tchar ch = s.empty() ? 0 : s[s.size() - 1];\n\n\tif (ch != 0 && ch != '[' && ch != '{')\n\t\ts += \",\";\n}\n\nvoid append(std::string& s, size_t v)\n{\n\tchar buf[32];\n\tsnprintf(buf, sizeof(buf), \"%zu\", v);\n\ts += buf;\n}\n\nvoid append(std::string& s, float v)\n{\n\t// sanitize +-inf to +-FLT_MAX and NaN to FLT_MAX\n\t// it would be more consistent to use null for NaN but that makes JSON invalid, and 0 makes it hard to distinguish from valid values\n\tfloat sv = fabsf(v) < FLT_MAX ? v : (v < 0 ? -FLT_MAX : FLT_MAX);\n\n\tchar buf[64];\n\tsnprintf(buf, sizeof(buf), \"%.9g\", sv);\n\ts += buf;\n}\n\nvoid append(std::string& s, const char* v)\n{\n\ts += v;\n}\n\nvoid append(std::string& s, const std::string& v)\n{\n\ts += v;\n}\n\nvoid append(std::string& s, const float* data, size_t count)\n{\n\ts += '[';\n\tfor (size_t i = 0; i < count; ++i)\n\t{\n\t\tif (i != 0)\n\t\t\ts += ',';\n\t\tappend(s, data[i]);\n\t}\n\ts += ']';\n}\n\nvoid appendJson(std::string& s, const char* data)\n{\n\tenum State\n\t{\n\t\tNone,\n\t\tEscape,\n\t\tQuoted\n\t} state = None;\n\n\tfor (const char* it = data; *it; ++it)\n\t{\n\t\tchar ch = *it;\n\n\t\t// whitespace outside of quoted strings can be ignored\n\t\tif (state != None || !isspace(ch))\n\t\t\ts += ch;\n\n\t\t// the finite automata tracks whether we're inside a quoted string\n\t\tswitch (state)\n\t\t{\n\t\tcase None:\n\t\t\tstate = (ch == '\"') ? Quoted : None;\n\t\t\tbreak;\n\n\t\tcase Quoted:\n\t\t\tstate = (ch == '\"') ? None : (ch == '\\\\' ? Escape : Quoted);\n\t\t\tbreak;\n\n\t\tcase Escape:\n\t\t\tstate = Quoted;\n\t\t\tbreak;\n\n\t\tdefault:\n\t\t\tassert(!\"Unexpected parsing state\");\n\t\t}\n\t}\n}\n" }, { "path": "gltf/library.js", "content": "// This file is part of gltfpack and is distributed under the terms of MIT License.\n\n/**\n * Initialize the library with the Wasm module (library.wasm)\n *\n * @param wasm Promise with contents of library.wasm\n *\n * Note: this is called automatically in node.js\n */\nfunction init(wasm) {\n\tif (ready) {\n\t\tthrow new Error('init must be called once');\n\t}\n\n\tready = Promise.resolve(wasm)\n\t\t.then(function (buffer) {\n\t\t\treturn WebAssembly.instantiate(buffer, { wasi_snapshot_preview1: wasi });\n\t\t})\n\t\t.then(function (result) {\n\t\t\tinstance = result.instance;\n\t\t\tinstance.exports.__wasm_call_ctors();\n\t\t});\n}\n\n/**\n * Pack the requested glTF data using the requested command line and access interface.\n *\n * @param args An array of strings with the input arguments; the paths for input and output files are interpreted by the interface\n * @param iface An interface to the system that will be used to service file requests and other system calls\n * @return Promise that indicates completion of the operation\n *\n * iface should contain the following methods:\n * read(path): Given a path, return a Uint8Array with the contents of that path\n * write(path, data): Write the specified Uint8Array to the provided path\n */\nfunction pack(args, iface) {\n\tif (!ready) {\n\t\tthrow new Error('init must be called before pack');\n\t}\n\n\tvar argv = args.slice();\n\targv.unshift('gltfpack');\n\n\treturn ready.then(function () {\n\t\tvar buf = uploadArgv(argv);\n\n\t\toutput.position = 0;\n\t\toutput.size = 0;\n\n\t\tfs_interface = iface;\n\t\tvar result = instance.exports.pack(argv.length, buf);\n\t\tfs_interface = undefined;\n\n\t\tinstance.exports.free(buf);\n\n\t\tvar log = getString(output.data.buffer, 0, output.size);\n\n\t\tif (result != 0) {\n\t\t\tthrow new Error(log);\n\t\t} else {\n\t\t\treturn log;\n\t\t}\n\t});\n}\n\n// Library implementation (here be dragons)\nvar WASI_EBADF = 8;\nvar WASI_EINVAL = 28;\nvar WASI_EIO = 29;\nvar WASI_ENOSYS = 52;\n\nvar ready;\nvar instance;\nvar fs_interface;\n\nvar output = { data: new Uint8Array(), position: 0, size: 0 };\nvar fds = { 1: output, 2: output, 3: { mount: '/', path: '/' }, 4: { mount: '/gltfpack-$pwd', path: '' } };\n\nvar wasi = {\n\tproc_exit: function (rval) {},\n\n\tfd_close: function (fd) {\n\t\tif (!fds[fd]) {\n\t\t\treturn WASI_EBADF;\n\t\t}\n\n\t\ttry {\n\t\t\tif (fds[fd].close) {\n\t\t\t\tfds[fd].close();\n\t\t\t}\n\t\t\tfds[fd] = undefined;\n\t\t\treturn 0;\n\t\t} catch (err) {\n\t\t\tfds[fd] = undefined;\n\t\t\treturn WASI_EIO;\n\t\t}\n\t},\n\n\tfd_fdstat_get: function (fd, stat) {\n\t\tif (!fds[fd]) {\n\t\t\treturn WASI_EBADF;\n\t\t}\n\n\t\tvar heap = getHeap();\n\t\theap.setUint8(stat + 0, fds[fd].path !== undefined ? 3 : 4);\n\t\theap.setUint16(stat + 2, 0, true);\n\t\theap.setUint32(stat + 8, 0, true);\n\t\theap.setUint32(stat + 12, 0, true);\n\t\theap.setUint32(stat + 16, 0, true);\n\t\theap.setUint32(stat + 20, 0, true);\n\t\treturn 0;\n\t},\n\n\tpath_open32: function (parent_fd, dirflags, path, path_len, oflags, fs_rights_base, fs_rights_inheriting, fdflags, opened_fd) {\n\t\tif (!fds[parent_fd] || fds[parent_fd].path === undefined) {\n\t\t\treturn WASI_EBADF;\n\t\t}\n\n\t\tvar heap = getHeap();\n\n\t\tvar file = {};\n\t\tfile.name = fds[parent_fd].path + getString(heap.buffer, path, path_len);\n\t\tfile.position = 0;\n\n\t\tif (oflags & 1) {\n\t\t\tfile.data = new Uint8Array(4096);\n\t\t\tfile.size = 0;\n\t\t\tfile.close = function () {\n\t\t\t\tfs_interface.write(file.name, new Uint8Array(file.data.buffer, 0, file.size));\n\t\t\t};\n\t\t} else {\n\t\t\ttry {\n\t\t\t\tfile.data = fs_interface.read(file.name);\n\n\t\t\t\tif (!file.data) {\n\t\t\t\t\treturn WASI_EIO;\n\t\t\t\t}\n\n\t\t\t\tfile.size = file.data.length;\n\t\t\t} catch (err) {\n\t\t\t\treturn WASI_EIO;\n\t\t\t}\n\t\t}\n\n\t\tvar fd = nextFd();\n\t\tfds[fd] = file;\n\n\t\theap.setUint32(opened_fd, fd, true);\n\t\treturn 0;\n\t},\n\n\tpath_filestat_get: function (parent_fd, flags, path, path_len, buf) {\n\t\tif (!fds[parent_fd] || fds[parent_fd].path === undefined) {\n\t\t\treturn WASI_EBADF;\n\t\t}\n\n\t\tvar heap = getHeap();\n\t\tvar name = getString(heap.buffer, path, path_len);\n\n\t\tvar heap = getHeap();\n\t\tfor (var i = 0; i < 64; ++i) heap.setUint8(buf + i, 0);\n\n\t\theap.setUint8(buf + 16, name == '.' ? 3 : 4);\n\t\treturn 0;\n\t},\n\n\tfd_prestat_get: function (fd, buf) {\n\t\tif (!fds[fd] || fds[fd].path === undefined) {\n\t\t\treturn WASI_EBADF;\n\t\t}\n\n\t\tvar path_buf = stringBuffer(fds[fd].mount);\n\n\t\tvar heap = getHeap();\n\t\theap.setUint8(buf, 0);\n\t\theap.setUint32(buf + 4, path_buf.length, true);\n\t\treturn 0;\n\t},\n\n\tfd_prestat_dir_name: function (fd, path, path_len) {\n\t\tif (!fds[fd] || fds[fd].path === undefined) {\n\t\t\treturn WASI_EBADF;\n\t\t}\n\n\t\tvar path_buf = stringBuffer(fds[fd].mount);\n\n\t\tif (path_len != path_buf.length) {\n\t\t\treturn WASI_EINVAL;\n\t\t}\n\n\t\tvar heap = getHeap();\n\t\tnew Uint8Array(heap.buffer).set(path_buf, path);\n\t\treturn 0;\n\t},\n\n\tpath_remove_directory: function (parent_fd, path, path_len) {\n\t\treturn WASI_EINVAL;\n\t},\n\n\tfd_fdstat_set_flags: function (fd, flags) {\n\t\treturn WASI_ENOSYS;\n\t},\n\n\tfd_seek32: function (fd, offset, whence, newoffset) {\n\t\tif (!fds[fd]) {\n\t\t\treturn WASI_EBADF;\n\t\t}\n\n\t\tvar newposition;\n\n\t\tswitch (whence) {\n\t\t\tcase 0:\n\t\t\t\tnewposition = offset;\n\t\t\t\tbreak;\n\n\t\t\tcase 1:\n\t\t\t\tnewposition = fds[fd].position + offset;\n\t\t\t\tbreak;\n\n\t\t\tcase 2:\n\t\t\t\tnewposition = fds[fd].size;\n\t\t\t\tbreak;\n\n\t\t\tdefault:\n\t\t\t\treturn WASI_EINVAL;\n\t\t}\n\n\t\tif (newposition > fds[fd].size) {\n\t\t\treturn WASI_EINVAL;\n\t\t}\n\n\t\tfds[fd].position = newposition;\n\n\t\tvar heap = getHeap();\n\t\theap.setUint32(newoffset, newposition, true);\n\t\treturn 0;\n\t},\n\n\tfd_read: function (fd, iovs, iovs_len, nread) {\n\t\tif (!fds[fd]) {\n\t\t\treturn WASI_EBADF;\n\t\t}\n\n\t\tvar heap = getHeap();\n\t\tvar read = 0;\n\n\t\tfor (var i = 0; i < iovs_len; ++i) {\n\t\t\tvar buf = heap.getUint32(iovs + 8 * i + 0, true);\n\t\t\tvar buf_len = heap.getUint32(iovs + 8 * i + 4, true);\n\n\t\t\tvar readi = Math.min(fds[fd].size - fds[fd].position, buf_len);\n\n\t\t\tnew Uint8Array(heap.buffer).set(fds[fd].data.subarray(fds[fd].position, fds[fd].position + readi), buf);\n\n\t\t\tfds[fd].position += readi;\n\t\t\tread += readi;\n\t\t}\n\n\t\theap.setUint32(nread, read, true);\n\t\treturn 0;\n\t},\n\n\tfd_write: function (fd, iovs, iovs_len, nwritten) {\n\t\tif (!fds[fd]) {\n\t\t\treturn WASI_EBADF;\n\t\t}\n\n\t\tvar heap = getHeap();\n\t\tvar written = 0;\n\n\t\tfor (var i = 0; i < iovs_len; ++i) {\n\t\t\tvar buf = heap.getUint32(iovs + 8 * i + 0, true);\n\t\t\tvar buf_len = heap.getUint32(iovs + 8 * i + 4, true);\n\n\t\t\tif (fds[fd].position + buf_len > fds[fd].data.length) {\n\t\t\t\tfds[fd].data = growArray(fds[fd].data, fds[fd].position + buf_len);\n\t\t\t}\n\n\t\t\tfds[fd].data.set(new Uint8Array(heap.buffer, buf, buf_len), fds[fd].position);\n\t\t\tfds[fd].position += buf_len;\n\t\t\tfds[fd].size = Math.max(fds[fd].position, fds[fd].size);\n\n\t\t\twritten += buf_len;\n\t\t}\n\n\t\theap.setUint32(nwritten, written, true);\n\t\treturn 0;\n\t},\n};\n\nfunction nextFd() {\n\tfor (var i = 1; ; ++i) {\n\t\tif (fds[i] === undefined) {\n\t\t\treturn i;\n\t\t}\n\t}\n}\n\nfunction getHeap() {\n\treturn new DataView(instance.exports.memory.buffer);\n}\n\nfunction getString(buffer, offset, length) {\n\treturn new TextDecoder().decode(new Uint8Array(buffer, offset, length));\n}\n\nfunction stringBuffer(string) {\n\treturn new TextEncoder().encode(string);\n}\n\nfunction growArray(data, len) {\n\tvar new_length = Math.max(1, data.length);\n\twhile (new_length < len) {\n\t\tnew_length *= 2;\n\t}\n\n\tvar new_data = new Uint8Array(new_length);\n\tnew_data.set(data);\n\n\treturn new_data;\n}\n\nfunction uploadArgv(argv) {\n\tvar buf_size = argv.length * 4;\n\tfor (var i = 0; i < argv.length; ++i) {\n\t\tbuf_size += stringBuffer(argv[i]).length + 1;\n\t}\n\n\tvar buf = instance.exports.malloc(buf_size);\n\tvar argp = buf + argv.length * 4;\n\n\tvar heap = getHeap();\n\n\tfor (var i = 0; i < argv.length; ++i) {\n\t\tvar item = stringBuffer(argv[i]);\n\n\t\theap.setUint32(buf + i * 4, argp, true);\n\t\tnew Uint8Array(heap.buffer).set(item, argp);\n\t\theap.setUint8(argp + item.length, 0);\n\n\t\targp += item.length + 1;\n\t}\n\n\treturn buf;\n}\n\n// Automatic initialization for node.js\nif (typeof process !== 'undefined' && process.release && process.release.name === 'node') {\n\tinit(\n\t\timport('node:fs').then(function (fs) {\n\t\t\treturn fs.readFileSync(new URL('./library.wasm', import.meta.url));\n\t\t})\n\t);\n}\n\nexport { init, pack };\n" }, { "path": "gltf/material.cpp", "content": "// This file is part of gltfpack; see gltfpack.h for version/license details\n#include \"gltfpack.h\"\n\n#include \n\nstatic bool areTexturesEqual(const cgltf_texture& lhs, const cgltf_texture& rhs)\n{\n\tif (lhs.image != rhs.image)\n\t\treturn false;\n\n\tif (lhs.sampler != rhs.sampler)\n\t\treturn false;\n\n\tif (lhs.basisu_image != rhs.basisu_image)\n\t\treturn false;\n\n\tif (lhs.webp_image != rhs.webp_image)\n\t\treturn false;\n\n\treturn true;\n}\n\nstatic bool areTextureViewsEqual(const cgltf_texture_view& lhs, const cgltf_texture_view& rhs)\n{\n\tif (lhs.has_transform != rhs.has_transform)\n\t\treturn false;\n\n\tif (lhs.has_transform)\n\t{\n\t\tconst cgltf_texture_transform& lt = lhs.transform;\n\t\tconst cgltf_texture_transform& rt = rhs.transform;\n\n\t\tif (memcmp(lt.offset, rt.offset, sizeof(cgltf_float) * 2) != 0)\n\t\t\treturn false;\n\n\t\tif (lt.rotation != rt.rotation)\n\t\t\treturn false;\n\n\t\tif (memcmp(lt.scale, rt.scale, sizeof(cgltf_float) * 2) != 0)\n\t\t\treturn false;\n\n\t\tif (lt.texcoord != rt.texcoord)\n\t\t\treturn false;\n\t}\n\n\tif (lhs.texture != rhs.texture && (!lhs.texture || !rhs.texture || !areTexturesEqual(*lhs.texture, *rhs.texture)))\n\t\treturn false;\n\n\tif (lhs.texcoord != rhs.texcoord)\n\t\treturn false;\n\n\tif (lhs.scale != rhs.scale)\n\t\treturn false;\n\n\treturn true;\n}\n\nstatic bool areMaterialComponentsEqual(const cgltf_pbr_metallic_roughness& lhs, const cgltf_pbr_metallic_roughness& rhs)\n{\n\tif (!areTextureViewsEqual(lhs.base_color_texture, rhs.base_color_texture))\n\t\treturn false;\n\n\tif (!areTextureViewsEqual(lhs.metallic_roughness_texture, rhs.metallic_roughness_texture))\n\t\treturn false;\n\n\tif (memcmp(lhs.base_color_factor, rhs.base_color_factor, sizeof(cgltf_float) * 4) != 0)\n\t\treturn false;\n\n\tif (lhs.metallic_factor != rhs.metallic_factor)\n\t\treturn false;\n\n\tif (lhs.roughness_factor != rhs.roughness_factor)\n\t\treturn false;\n\n\treturn true;\n}\n\nstatic bool areMaterialComponentsEqual(const cgltf_pbr_specular_glossiness& lhs, const cgltf_pbr_specular_glossiness& rhs)\n{\n\tif (!areTextureViewsEqual(lhs.diffuse_texture, rhs.diffuse_texture))\n\t\treturn false;\n\n\tif (!areTextureViewsEqual(lhs.specular_glossiness_texture, rhs.specular_glossiness_texture))\n\t\treturn false;\n\n\tif (memcmp(lhs.diffuse_factor, rhs.diffuse_factor, sizeof(cgltf_float) * 4) != 0)\n\t\treturn false;\n\n\tif (memcmp(lhs.specular_factor, rhs.specular_factor, sizeof(cgltf_float) * 3) != 0)\n\t\treturn false;\n\n\tif (lhs.glossiness_factor != rhs.glossiness_factor)\n\t\treturn false;\n\n\treturn true;\n}\n\nstatic bool areMaterialComponentsEqual(const cgltf_clearcoat& lhs, const cgltf_clearcoat& rhs)\n{\n\tif (!areTextureViewsEqual(lhs.clearcoat_texture, rhs.clearcoat_texture))\n\t\treturn false;\n\n\tif (!areTextureViewsEqual(lhs.clearcoat_roughness_texture, rhs.clearcoat_roughness_texture))\n\t\treturn false;\n\n\tif (!areTextureViewsEqual(lhs.clearcoat_normal_texture, rhs.clearcoat_normal_texture))\n\t\treturn false;\n\n\tif (lhs.clearcoat_factor != rhs.clearcoat_factor)\n\t\treturn false;\n\n\tif (lhs.clearcoat_roughness_factor != rhs.clearcoat_roughness_factor)\n\t\treturn false;\n\n\treturn true;\n}\n\nstatic bool areMaterialComponentsEqual(const cgltf_transmission& lhs, const cgltf_transmission& rhs)\n{\n\tif (!areTextureViewsEqual(lhs.transmission_texture, rhs.transmission_texture))\n\t\treturn false;\n\n\tif (lhs.transmission_factor != rhs.transmission_factor)\n\t\treturn false;\n\n\treturn true;\n}\n\nstatic bool areMaterialComponentsEqual(const cgltf_ior& lhs, const cgltf_ior& rhs)\n{\n\tif (lhs.ior != rhs.ior)\n\t\treturn false;\n\n\treturn true;\n}\n\nstatic bool areMaterialComponentsEqual(const cgltf_specular& lhs, const cgltf_specular& rhs)\n{\n\tif (!areTextureViewsEqual(lhs.specular_texture, rhs.specular_texture))\n\t\treturn false;\n\n\tif (!areTextureViewsEqual(lhs.specular_color_texture, rhs.specular_color_texture))\n\t\treturn false;\n\n\tif (lhs.specular_factor != rhs.specular_factor)\n\t\treturn false;\n\n\tif (memcmp(lhs.specular_color_factor, rhs.specular_color_factor, sizeof(cgltf_float) * 3) != 0)\n\t\treturn false;\n\n\treturn true;\n}\n\nstatic bool areMaterialComponentsEqual(const cgltf_sheen& lhs, const cgltf_sheen& rhs)\n{\n\tif (!areTextureViewsEqual(lhs.sheen_color_texture, rhs.sheen_color_texture))\n\t\treturn false;\n\n\tif (memcmp(lhs.sheen_color_factor, rhs.sheen_color_factor, sizeof(cgltf_float) * 3) != 0)\n\t\treturn false;\n\n\tif (!areTextureViewsEqual(lhs.sheen_roughness_texture, rhs.sheen_roughness_texture))\n\t\treturn false;\n\n\tif (lhs.sheen_roughness_factor != rhs.sheen_roughness_factor)\n\t\treturn false;\n\n\treturn true;\n}\n\nstatic bool areMaterialComponentsEqual(const cgltf_volume& lhs, const cgltf_volume& rhs)\n{\n\tif (!areTextureViewsEqual(lhs.thickness_texture, rhs.thickness_texture))\n\t\treturn false;\n\n\tif (lhs.thickness_factor != rhs.thickness_factor)\n\t\treturn false;\n\n\tif (memcmp(lhs.attenuation_color, rhs.attenuation_color, sizeof(cgltf_float) * 3) != 0)\n\t\treturn false;\n\n\tif (lhs.attenuation_distance != rhs.attenuation_distance)\n\t\treturn false;\n\n\treturn true;\n}\n\nstatic bool areMaterialComponentsEqual(const cgltf_emissive_strength& lhs, const cgltf_emissive_strength& rhs)\n{\n\tif (lhs.emissive_strength != rhs.emissive_strength)\n\t\treturn false;\n\n\treturn true;\n}\n\nstatic bool areMaterialComponentsEqual(const cgltf_iridescence& lhs, const cgltf_iridescence& rhs)\n{\n\tif (lhs.iridescence_factor != rhs.iridescence_factor)\n\t\treturn false;\n\n\tif (!areTextureViewsEqual(lhs.iridescence_texture, rhs.iridescence_texture))\n\t\treturn false;\n\n\tif (lhs.iridescence_ior != rhs.iridescence_ior)\n\t\treturn false;\n\n\tif (lhs.iridescence_thickness_min != rhs.iridescence_thickness_min)\n\t\treturn false;\n\n\tif (lhs.iridescence_thickness_max != rhs.iridescence_thickness_max)\n\t\treturn false;\n\n\tif (!areTextureViewsEqual(lhs.iridescence_thickness_texture, rhs.iridescence_thickness_texture))\n\t\treturn false;\n\n\treturn true;\n}\n\nstatic bool areMaterialComponentsEqual(const cgltf_anisotropy& lhs, const cgltf_anisotropy& rhs)\n{\n\tif (lhs.anisotropy_strength != rhs.anisotropy_strength)\n\t\treturn false;\n\n\tif (lhs.anisotropy_rotation != rhs.anisotropy_rotation)\n\t\treturn false;\n\n\tif (!areTextureViewsEqual(lhs.anisotropy_texture, rhs.anisotropy_texture))\n\t\treturn false;\n\n\treturn true;\n}\n\nstatic bool areMaterialComponentsEqual(const cgltf_dispersion& lhs, const cgltf_dispersion& rhs)\n{\n\tif (lhs.dispersion != rhs.dispersion)\n\t\treturn false;\n\n\treturn true;\n}\n\nstatic bool areMaterialComponentsEqual(const cgltf_diffuse_transmission& lhs, const cgltf_diffuse_transmission& rhs)\n{\n\tif (lhs.diffuse_transmission_factor != rhs.diffuse_transmission_factor)\n\t\treturn false;\n\n\tif (memcmp(lhs.diffuse_transmission_color_factor, rhs.diffuse_transmission_color_factor, sizeof(cgltf_float) * 3) != 0)\n\t\treturn false;\n\n\tif (!areTextureViewsEqual(lhs.diffuse_transmission_texture, rhs.diffuse_transmission_texture))\n\t\treturn false;\n\n\tif (!areTextureViewsEqual(lhs.diffuse_transmission_color_texture, rhs.diffuse_transmission_color_texture))\n\t\treturn false;\n\n\treturn true;\n}\n\nstatic bool areMaterialsEqual(const cgltf_material& lhs, const cgltf_material& rhs, const Settings& settings)\n{\n\tif (lhs.has_pbr_metallic_roughness != rhs.has_pbr_metallic_roughness)\n\t\treturn false;\n\n\tif (lhs.has_pbr_metallic_roughness && !areMaterialComponentsEqual(lhs.pbr_metallic_roughness, rhs.pbr_metallic_roughness))\n\t\treturn false;\n\n\tif (lhs.has_pbr_specular_glossiness != rhs.has_pbr_specular_glossiness)\n\t\treturn false;\n\n\tif (lhs.has_pbr_specular_glossiness && !areMaterialComponentsEqual(lhs.pbr_specular_glossiness, rhs.pbr_specular_glossiness))\n\t\treturn false;\n\n\tif (lhs.has_clearcoat != rhs.has_clearcoat)\n\t\treturn false;\n\n\tif (lhs.has_clearcoat && !areMaterialComponentsEqual(lhs.clearcoat, rhs.clearcoat))\n\t\treturn false;\n\n\tif (lhs.has_transmission != rhs.has_transmission)\n\t\treturn false;\n\n\tif (lhs.has_transmission && !areMaterialComponentsEqual(lhs.transmission, rhs.transmission))\n\t\treturn false;\n\n\tif (lhs.has_ior != rhs.has_ior)\n\t\treturn false;\n\n\tif (lhs.has_ior && !areMaterialComponentsEqual(lhs.ior, rhs.ior))\n\t\treturn false;\n\n\tif (lhs.has_specular != rhs.has_specular)\n\t\treturn false;\n\n\tif (lhs.has_specular && !areMaterialComponentsEqual(lhs.specular, rhs.specular))\n\t\treturn false;\n\n\tif (lhs.has_sheen != rhs.has_sheen)\n\t\treturn false;\n\n\tif (lhs.has_sheen && !areMaterialComponentsEqual(lhs.sheen, rhs.sheen))\n\t\treturn false;\n\n\tif (lhs.has_volume != rhs.has_volume)\n\t\treturn false;\n\n\tif (lhs.has_volume && !areMaterialComponentsEqual(lhs.volume, rhs.volume))\n\t\treturn false;\n\n\tif (lhs.has_emissive_strength != rhs.has_emissive_strength)\n\t\treturn false;\n\n\tif (lhs.has_emissive_strength && !areMaterialComponentsEqual(lhs.emissive_strength, rhs.emissive_strength))\n\t\treturn false;\n\n\tif (lhs.has_iridescence != rhs.has_iridescence)\n\t\treturn false;\n\n\tif (lhs.has_iridescence && !areMaterialComponentsEqual(lhs.iridescence, rhs.iridescence))\n\t\treturn false;\n\n\tif (lhs.has_anisotropy != rhs.has_anisotropy)\n\t\treturn false;\n\n\tif (lhs.has_anisotropy && !areMaterialComponentsEqual(lhs.anisotropy, rhs.anisotropy))\n\t\treturn false;\n\n\tif (lhs.has_dispersion != rhs.has_dispersion)\n\t\treturn false;\n\n\tif (lhs.has_dispersion && !areMaterialComponentsEqual(lhs.dispersion, rhs.dispersion))\n\t\treturn false;\n\n\tif (lhs.has_diffuse_transmission != rhs.has_diffuse_transmission)\n\t\treturn false;\n\n\tif (lhs.has_diffuse_transmission && !areMaterialComponentsEqual(lhs.diffuse_transmission, rhs.diffuse_transmission))\n\t\treturn false;\n\n\tif (!areTextureViewsEqual(lhs.normal_texture, rhs.normal_texture))\n\t\treturn false;\n\n\tif (!areTextureViewsEqual(lhs.occlusion_texture, rhs.occlusion_texture))\n\t\treturn false;\n\n\tif (!areTextureViewsEqual(lhs.emissive_texture, rhs.emissive_texture))\n\t\treturn false;\n\n\tif (memcmp(lhs.emissive_factor, rhs.emissive_factor, sizeof(cgltf_float) * 3) != 0)\n\t\treturn false;\n\n\tif (lhs.alpha_mode != rhs.alpha_mode)\n\t\treturn false;\n\n\tif (lhs.alpha_cutoff != rhs.alpha_cutoff)\n\t\treturn false;\n\n\tif (lhs.double_sided != rhs.double_sided)\n\t\treturn false;\n\n\tif (lhs.unlit != rhs.unlit)\n\t\treturn false;\n\n\tif (settings.keep_extras && !areExtrasEqual(lhs.extras, rhs.extras))\n\t\treturn false;\n\n\treturn true;\n}\n\nvoid mergeMeshMaterials(cgltf_data* data, std::vector& meshes, const Settings& settings)\n{\n\tstd::vector material_remap(data->materials_count);\n\n\tfor (size_t i = 0; i < data->materials_count; ++i)\n\t{\n\t\tmaterial_remap[i] = &data->materials[i];\n\n\t\tif (settings.keep_materials && data->materials[i].name && *data->materials[i].name)\n\t\t\tcontinue;\n\n\t\tassert(areMaterialsEqual(data->materials[i], data->materials[i], settings));\n\n\t\tfor (size_t j = 0; j < i; ++j)\n\t\t{\n\t\t\tif (settings.keep_materials && data->materials[j].name && *data->materials[j].name)\n\t\t\t\tcontinue;\n\n\t\t\tif (areMaterialsEqual(data->materials[i], data->materials[j], settings))\n\t\t\t{\n\t\t\t\tmaterial_remap[i] = &data->materials[j];\n\t\t\t\tbreak;\n\t\t\t}\n\t\t}\n\t}\n\n\tfor (size_t i = 0; i < meshes.size(); ++i)\n\t{\n\t\tMesh& mesh = meshes[i];\n\n\t\tif (mesh.material)\n\t\t\tmesh.material = material_remap[mesh.material - data->materials];\n\n\t\tfor (size_t j = 0; j < mesh.variants.size(); ++j)\n\t\t\tmesh.variants[j].material = material_remap[mesh.variants[j].material - data->materials];\n\t}\n}\n\nvoid markNeededMaterials(cgltf_data* data, std::vector& materials, const std::vector& meshes, const Settings& settings)\n{\n\t// mark all used materials as kept\n\tfor (size_t i = 0; i < meshes.size(); ++i)\n\t{\n\t\tconst Mesh& mesh = meshes[i];\n\n\t\tif (mesh.material)\n\t\t{\n\t\t\tMaterialInfo& mi = materials[mesh.material - data->materials];\n\n\t\t\tmi.keep = true;\n\t\t}\n\n\t\tfor (size_t j = 0; j < mesh.variants.size(); ++j)\n\t\t{\n\t\t\tMaterialInfo& mi = materials[mesh.variants[j].material - data->materials];\n\n\t\t\tmi.keep = true;\n\t\t}\n\t}\n\n\t// mark all named materials as kept if requested\n\tif (settings.keep_materials)\n\t{\n\t\tfor (size_t i = 0; i < data->materials_count; ++i)\n\t\t{\n\t\t\tcgltf_material& material = data->materials[i];\n\n\t\t\tif (material.name && *material.name)\n\t\t\t{\n\t\t\t\tmaterials[i].keep = true;\n\t\t\t}\n\t\t}\n\t}\n}\n\nbool hasValidTransform(const cgltf_texture_view& view)\n{\n\tif (view.has_transform)\n\t{\n\t\tif (view.transform.offset[0] != 0.0f || view.transform.offset[1] != 0.0f ||\n\t\t view.transform.scale[0] != 1.0f || view.transform.scale[1] != 1.0f ||\n\t\t view.transform.rotation != 0.0f)\n\t\t\treturn true;\n\n\t\tif (view.transform.has_texcoord && view.transform.texcoord != view.texcoord)\n\t\t\treturn true;\n\t}\n\n\treturn false;\n}\n\nstatic const cgltf_image* getTextureImage(const cgltf_texture* texture)\n{\n\tif (texture && texture->image)\n\t\treturn texture->image;\n\n\tif (texture && texture->basisu_image)\n\t\treturn texture->basisu_image;\n\n\tif (texture && texture->webp_image)\n\t\treturn texture->webp_image;\n\n\treturn NULL;\n}\n\nstatic void analyzeMaterialTexture(const cgltf_texture_view& view, TextureKind kind, MaterialInfo& mi, cgltf_data* data, std::vector& textures, std::vector& images)\n{\n\tmi.uses_texture_transform |= hasValidTransform(view);\n\n\tif (view.texture)\n\t{\n\t\ttextures[view.texture - data->textures].keep = true;\n\n\t\tmi.texture_set_mask |= 1u << view.texcoord;\n\t\tmi.needs_tangents |= (kind == TextureKind_Normal);\n\t}\n\n\tif (const cgltf_image* image = getTextureImage(view.texture))\n\t{\n\t\tImageInfo& info = images[image - data->images];\n\n\t\tif (info.kind == TextureKind_Generic)\n\t\t\tinfo.kind = kind;\n\t\telse if (info.kind > kind) // this is useful to keep color textures that have attrib data in alpha tagged as color\n\t\t\tinfo.kind = kind;\n\n\t\tinfo.normal_map |= (kind == TextureKind_Normal);\n\t\tinfo.srgb |= (kind == TextureKind_Color);\n\t}\n}\n\nstatic void analyzeMaterial(const cgltf_material& material, MaterialInfo& mi, cgltf_data* data, std::vector& textures, std::vector& images)\n{\n\tif (material.has_pbr_metallic_roughness)\n\t{\n\t\tanalyzeMaterialTexture(material.pbr_metallic_roughness.base_color_texture, TextureKind_Color, mi, data, textures, images);\n\t\tanalyzeMaterialTexture(material.pbr_metallic_roughness.metallic_roughness_texture, TextureKind_Attrib, mi, data, textures, images);\n\t}\n\n\tif (material.has_pbr_specular_glossiness)\n\t{\n\t\tanalyzeMaterialTexture(material.pbr_specular_glossiness.diffuse_texture, TextureKind_Color, mi, data, textures, images);\n\t\tanalyzeMaterialTexture(material.pbr_specular_glossiness.specular_glossiness_texture, TextureKind_Attrib, mi, data, textures, images);\n\t}\n\n\tif (material.has_clearcoat)\n\t{\n\t\tanalyzeMaterialTexture(material.clearcoat.clearcoat_texture, TextureKind_Attrib, mi, data, textures, images);\n\t\tanalyzeMaterialTexture(material.clearcoat.clearcoat_roughness_texture, TextureKind_Attrib, mi, data, textures, images);\n\t\tanalyzeMaterialTexture(material.clearcoat.clearcoat_normal_texture, TextureKind_Normal, mi, data, textures, images);\n\t}\n\n\tif (material.has_transmission)\n\t{\n\t\tanalyzeMaterialTexture(material.transmission.transmission_texture, TextureKind_Attrib, mi, data, textures, images);\n\t}\n\n\tif (material.has_specular)\n\t{\n\t\tanalyzeMaterialTexture(material.specular.specular_texture, TextureKind_Attrib, mi, data, textures, images);\n\t\tanalyzeMaterialTexture(material.specular.specular_color_texture, TextureKind_Color, mi, data, textures, images);\n\t}\n\n\tif (material.has_sheen)\n\t{\n\t\tanalyzeMaterialTexture(material.sheen.sheen_color_texture, TextureKind_Color, mi, data, textures, images);\n\t\tanalyzeMaterialTexture(material.sheen.sheen_roughness_texture, TextureKind_Attrib, mi, data, textures, images);\n\t}\n\n\tif (material.has_volume)\n\t{\n\t\tanalyzeMaterialTexture(material.volume.thickness_texture, TextureKind_Attrib, mi, data, textures, images);\n\t}\n\n\tif (material.has_iridescence)\n\t{\n\t\tanalyzeMaterialTexture(material.iridescence.iridescence_texture, TextureKind_Attrib, mi, data, textures, images);\n\t\tanalyzeMaterialTexture(material.iridescence.iridescence_thickness_texture, TextureKind_Attrib, mi, data, textures, images);\n\t}\n\n\tif (material.has_anisotropy)\n\t{\n\t\tanalyzeMaterialTexture(material.anisotropy.anisotropy_texture, TextureKind_Normal, mi, data, textures, images);\n\t}\n\n\tif (material.has_diffuse_transmission)\n\t{\n\t\tanalyzeMaterialTexture(material.diffuse_transmission.diffuse_transmission_texture, TextureKind_Attrib, mi, data, textures, images);\n\t\tanalyzeMaterialTexture(material.diffuse_transmission.diffuse_transmission_color_texture, TextureKind_Color, mi, data, textures, images);\n\t}\n\n\tanalyzeMaterialTexture(material.normal_texture, TextureKind_Normal, mi, data, textures, images);\n\tanalyzeMaterialTexture(material.occlusion_texture, TextureKind_Attrib, mi, data, textures, images);\n\tanalyzeMaterialTexture(material.emissive_texture, TextureKind_Color, mi, data, textures, images);\n\n\tif (material.unlit)\n\t\tmi.unlit = true;\n}\n\nvoid analyzeMaterials(cgltf_data* data, std::vector& materials, std::vector& textures, std::vector& images)\n{\n\tfor (size_t i = 0; i < data->materials_count; ++i)\n\t{\n\t\tanalyzeMaterial(data->materials[i], materials[i], data, textures, images);\n\t}\n}\n\nstatic int getChannels(const cgltf_image& image, ImageInfo& info, const char* input_path)\n{\n\tif (info.channels)\n\t\treturn info.channels;\n\n\tstd::string img_data;\n\tstd::string mime_type;\n\tif (readImage(image, input_path, img_data, mime_type))\n\t\tinfo.channels = hasAlpha(img_data, mime_type.c_str()) ? 4 : 3;\n\telse\n\t\tinfo.channels = -1;\n\n\treturn info.channels;\n}\n\nstatic bool shouldKeepAlpha(const cgltf_texture_view& color, float alpha, cgltf_data* data, const char* input_path, std::vector& images)\n{\n\tif (alpha != 1.f)\n\t\treturn true;\n\n\tconst cgltf_image* image = getTextureImage(color.texture);\n\n\treturn image && getChannels(*image, images[image - data->images], input_path) == 4;\n}\n\nvoid optimizeMaterials(cgltf_data* data, std::vector& materials, std::vector& images, const char* input_path)\n{\n\tfor (size_t i = 0; i < data->materials_count; ++i)\n\t{\n\t\t// remove BLEND/MASK from materials that don't have alpha information\n\t\tcgltf_material& material = data->materials[i];\n\n\t\tif (material.alpha_mode != cgltf_alpha_mode_opaque && !materials[i].mesh_alpha)\n\t\t{\n\t\t\tif (material.has_pbr_metallic_roughness && shouldKeepAlpha(material.pbr_metallic_roughness.base_color_texture, material.pbr_metallic_roughness.base_color_factor[3], data, input_path, images))\n\t\t\t\tcontinue;\n\n\t\t\tif (material.has_pbr_specular_glossiness && shouldKeepAlpha(material.pbr_specular_glossiness.diffuse_texture, material.pbr_specular_glossiness.diffuse_factor[3], data, input_path, images))\n\t\t\t\tcontinue;\n\n\t\t\tmaterial.alpha_mode = cgltf_alpha_mode_opaque;\n\t\t\tmaterial.alpha_cutoff = 0.5f; // reset to default to avoid writing it to output\n\t\t}\n\t}\n}\n\nvoid mergeTextures(cgltf_data* data, std::vector& textures)\n{\n\tsize_t offset = 0;\n\n\tfor (size_t i = 0; i < textures.size(); ++i)\n\t{\n\t\tTextureInfo& info = textures[i];\n\n\t\tif (!info.keep)\n\t\t\tcontinue;\n\n\t\tfor (size_t j = 0; j < i; ++j)\n\t\t\tif (textures[j].keep && areTexturesEqual(data->textures[i], data->textures[j]))\n\t\t\t{\n\t\t\t\tinfo.keep = false;\n\t\t\t\tinfo.remap = textures[j].remap;\n\t\t\t\tbreak;\n\t\t\t}\n\n\t\tif (info.keep)\n\t\t{\n\t\t\tinfo.remap = int(offset);\n\t\t\toffset++;\n\t\t}\n\t}\n}\n" }, { "path": "gltf/mesh.cpp", "content": "// This file is part of gltfpack; see gltfpack.h for version/license details\n#include \"gltfpack.h\"\n\n#include \n#include \n\n#include \n#include \n#include \n\n#include \"../src/meshoptimizer.h\"\n\nstatic float inverseTranspose(float* result, const float* transform)\n{\n\tfloat m[4][4] = {};\n\tmemcpy(m, transform, 16 * sizeof(float));\n\n\tfloat det =\n\t m[0][0] * (m[1][1] * m[2][2] - m[2][1] * m[1][2]) -\n\t m[0][1] * (m[1][0] * m[2][2] - m[1][2] * m[2][0]) +\n\t m[0][2] * (m[1][0] * m[2][1] - m[1][1] * m[2][0]);\n\n\tfloat invdet = (det == 0.f) ? 0.f : 1.f / det;\n\n\tfloat r[4][4] = {};\n\n\tr[0][0] = (m[1][1] * m[2][2] - m[2][1] * m[1][2]) * invdet;\n\tr[1][0] = (m[0][2] * m[2][1] - m[0][1] * m[2][2]) * invdet;\n\tr[2][0] = (m[0][1] * m[1][2] - m[0][2] * m[1][1]) * invdet;\n\tr[0][1] = (m[1][2] * m[2][0] - m[1][0] * m[2][2]) * invdet;\n\tr[1][1] = (m[0][0] * m[2][2] - m[0][2] * m[2][0]) * invdet;\n\tr[2][1] = (m[1][0] * m[0][2] - m[0][0] * m[1][2]) * invdet;\n\tr[0][2] = (m[1][0] * m[2][1] - m[2][0] * m[1][1]) * invdet;\n\tr[1][2] = (m[2][0] * m[0][1] - m[0][0] * m[2][1]) * invdet;\n\tr[2][2] = (m[0][0] * m[1][1] - m[1][0] * m[0][1]) * invdet;\n\n\tr[3][3] = 1.f;\n\n\tmemcpy(result, r, 16 * sizeof(float));\n\n\treturn det;\n}\n\nstatic void transformPosition(float* res, const float* ptr, const float* transform)\n{\n\tfloat x = ptr[0] * transform[0] + ptr[1] * transform[4] + ptr[2] * transform[8] + transform[12];\n\tfloat y = ptr[0] * transform[1] + ptr[1] * transform[5] + ptr[2] * transform[9] + transform[13];\n\tfloat z = ptr[0] * transform[2] + ptr[1] * transform[6] + ptr[2] * transform[10] + transform[14];\n\n\tres[0] = x;\n\tres[1] = y;\n\tres[2] = z;\n}\n\nstatic void transformNormal(float* res, const float* ptr, const float* transform)\n{\n\tfloat x = ptr[0] * transform[0] + ptr[1] * transform[4] + ptr[2] * transform[8];\n\tfloat y = ptr[0] * transform[1] + ptr[1] * transform[5] + ptr[2] * transform[9];\n\tfloat z = ptr[0] * transform[2] + ptr[1] * transform[6] + ptr[2] * transform[10];\n\n\tfloat l = sqrtf(x * x + y * y + z * z);\n\tfloat s = (l == 0.f) ? 0.f : 1 / l;\n\n\tres[0] = x * s;\n\tres[1] = y * s;\n\tres[2] = z * s;\n}\n\nstatic Stream* getStream(Mesh& mesh, cgltf_attribute_type type, int index = 0)\n{\n\tfor (size_t i = 0; i < mesh.streams.size(); ++i)\n\t\tif (mesh.streams[i].type == type && mesh.streams[i].index == index)\n\t\t\treturn &mesh.streams[i];\n\n\treturn NULL;\n}\n\n// assumes mesh & target are structurally identical\nstatic void transformMesh(Mesh& target, const Mesh& mesh, const cgltf_node* node)\n{\n\tassert(target.streams.size() == mesh.streams.size());\n\tassert(target.indices.size() == mesh.indices.size());\n\n\tfloat transform[16];\n\tcgltf_node_transform_world(node, transform);\n\n\tfloat transforminvt[16];\n\tfloat det = inverseTranspose(transforminvt, transform);\n\n\tfor (size_t si = 0; si < mesh.streams.size(); ++si)\n\t{\n\t\tconst Stream& source = mesh.streams[si];\n\t\tStream& stream = target.streams[si];\n\n\t\tassert(source.type == stream.type);\n\t\tassert(source.data.size() == stream.data.size());\n\n\t\tif (stream.type == cgltf_attribute_type_position)\n\t\t{\n\t\t\tfor (size_t i = 0; i < stream.data.size(); ++i)\n\t\t\t\ttransformPosition(stream.data[i].f, source.data[i].f, transform);\n\t\t}\n\t\telse if (stream.type == cgltf_attribute_type_normal)\n\t\t{\n\t\t\tfor (size_t i = 0; i < stream.data.size(); ++i)\n\t\t\t\ttransformNormal(stream.data[i].f, source.data[i].f, transforminvt);\n\t\t}\n\t\telse if (stream.type == cgltf_attribute_type_tangent)\n\t\t{\n\t\t\tfor (size_t i = 0; i < stream.data.size(); ++i)\n\t\t\t\ttransformNormal(stream.data[i].f, source.data[i].f, transform);\n\t\t}\n\t}\n\n\t// copy indices so that we can modify them below\n\ttarget.indices = mesh.indices;\n\n\tif (det < 0 && mesh.type == cgltf_primitive_type_triangles)\n\t{\n\t\t// negative scale means we need to flip face winding\n\t\tfor (size_t i = 0; i < target.indices.size(); i += 3)\n\t\t\tstd::swap(target.indices[i + 0], target.indices[i + 1]);\n\t}\n}\n\nbool compareMeshTargets(const Mesh& lhs, const Mesh& rhs)\n{\n\tif (lhs.targets != rhs.targets)\n\t\treturn false;\n\n\tif (lhs.target_weights.size() != rhs.target_weights.size())\n\t\treturn false;\n\n\tfor (size_t i = 0; i < lhs.target_weights.size(); ++i)\n\t\tif (lhs.target_weights[i] != rhs.target_weights[i])\n\t\t\treturn false;\n\n\tif (lhs.target_names.size() != rhs.target_names.size())\n\t\treturn false;\n\n\tfor (size_t i = 0; i < lhs.target_names.size(); ++i)\n\t\tif (strcmp(lhs.target_names[i], rhs.target_names[i]) != 0)\n\t\t\treturn false;\n\n\treturn true;\n}\n\nbool compareMeshVariants(const Mesh& lhs, const Mesh& rhs)\n{\n\tif (lhs.variants.size() != rhs.variants.size())\n\t\treturn false;\n\n\tfor (size_t i = 0; i < lhs.variants.size(); ++i)\n\t{\n\t\tif (lhs.variants[i].variant != rhs.variants[i].variant)\n\t\t\treturn false;\n\n\t\tif (lhs.variants[i].material != rhs.variants[i].material)\n\t\t\treturn false;\n\t}\n\n\treturn true;\n}\n\nbool compareMeshNodes(const Mesh& lhs, const Mesh& rhs)\n{\n\tif (lhs.nodes.size() != rhs.nodes.size())\n\t\treturn false;\n\n\tfor (size_t i = 0; i < lhs.nodes.size(); ++i)\n\t\tif (lhs.nodes[i] != rhs.nodes[i])\n\t\t\treturn false;\n\n\treturn true;\n}\n\nstatic bool compareInstances(const Instance& lhs, const Instance& rhs)\n{\n\treturn memcmp(&lhs, &rhs, sizeof(Instance)) == 0;\n}\n\nstatic bool canMergeMeshNodes(cgltf_node* lhs, cgltf_node* rhs, const Settings& settings)\n{\n\tif (lhs == rhs)\n\t\treturn true;\n\n\tif (lhs->parent != rhs->parent)\n\t\treturn false;\n\n\tbool lhs_transform = lhs->has_translation | lhs->has_rotation | lhs->has_scale | lhs->has_matrix | (!!lhs->weights);\n\tbool rhs_transform = rhs->has_translation | rhs->has_rotation | rhs->has_scale | rhs->has_matrix | (!!rhs->weights);\n\n\tif (lhs_transform || rhs_transform)\n\t\treturn false;\n\n\tif (settings.keep_nodes)\n\t{\n\t\tif (lhs->name && *lhs->name)\n\t\t\treturn false;\n\n\t\tif (rhs->name && *rhs->name)\n\t\t\treturn false;\n\t}\n\n\t// we can merge nodes that don't have transforms of their own and have the same parent\n\t// this is helpful when instead of splitting mesh into primitives, DCCs split mesh into mesh nodes\n\treturn true;\n}\n\nstatic bool canMergeMeshes(const Mesh& lhs, const Mesh& rhs, const Settings& settings)\n{\n\tif (lhs.scene != rhs.scene)\n\t\treturn false;\n\n\tif (lhs.nodes.size() != rhs.nodes.size())\n\t\treturn false;\n\n\tfor (size_t i = 0; i < lhs.nodes.size(); ++i)\n\t\tif (!canMergeMeshNodes(lhs.nodes[i], rhs.nodes[i], settings))\n\t\t\treturn false;\n\n\tif (lhs.instances.size() != rhs.instances.size())\n\t\treturn false;\n\n\tfor (size_t i = 0; i < lhs.instances.size(); ++i)\n\t\tif (!compareInstances(lhs.instances[i], rhs.instances[i]))\n\t\t\treturn false;\n\n\tif (lhs.material != rhs.material)\n\t\treturn false;\n\n\tif (lhs.skin != rhs.skin)\n\t\treturn false;\n\n\tif (lhs.type != rhs.type)\n\t\treturn false;\n\n\tif (!compareMeshTargets(lhs, rhs))\n\t\treturn false;\n\n\tif (!compareMeshVariants(lhs, rhs))\n\t\treturn false;\n\n\tif (lhs.indices.empty() != rhs.indices.empty())\n\t\treturn false;\n\n\tif (lhs.streams.size() != rhs.streams.size())\n\t\treturn false;\n\n\tif (settings.keep_extras && !areExtrasEqual(lhs.extras, rhs.extras))\n\t\treturn false;\n\n\tfor (size_t i = 0; i < lhs.streams.size(); ++i)\n\t\tif (lhs.streams[i].type != rhs.streams[i].type || lhs.streams[i].index != rhs.streams[i].index || lhs.streams[i].target != rhs.streams[i].target)\n\t\t\treturn false;\n\n\treturn true;\n}\n\nstatic void mergeMeshes(Mesh& target, const Mesh& mesh)\n{\n\tassert(target.streams.size() == mesh.streams.size());\n\n\tsize_t vertex_offset = target.streams[0].data.size();\n\tsize_t index_offset = target.indices.size();\n\n\tfor (size_t i = 0; i < target.streams.size(); ++i)\n\t\ttarget.streams[i].data.insert(target.streams[i].data.end(), mesh.streams[i].data.begin(), mesh.streams[i].data.end());\n\n\ttarget.indices.resize(target.indices.size() + mesh.indices.size());\n\n\tsize_t index_count = mesh.indices.size();\n\n\tfor (size_t i = 0; i < index_count; ++i)\n\t\ttarget.indices[index_offset + i] = unsigned(vertex_offset + mesh.indices[i]);\n}\n\nstatic void hashUpdate(uint64_t hash[2], const void* data, size_t size)\n{\n#define ROTL64(x, r) (((x) << (r)) | ((x) >> (64 - (r))))\n\n\t// MurMurHash3 128-bit\n\tconst uint64_t c1 = 0x87c37b91114253d5ull;\n\tconst uint64_t c2 = 0x4cf5ad432745937full;\n\n\tuint64_t h1 = hash[0], h2 = hash[1];\n\n\tsize_t offset = 0;\n\n\t// body\n\tfor (; offset + 16 <= size; offset += 16)\n\t{\n\t\tuint64_t k1, k2;\n\t\tmemcpy(&k1, static_cast(data) + offset + 0, 8);\n\t\tmemcpy(&k2, static_cast(data) + offset + 8, 8);\n\n\t\tk1 *= c1, k1 = ROTL64(k1, 31), k1 *= c2;\n\t\th1 ^= k1, h1 = ROTL64(h1, 27), h1 += h2;\n\t\th1 = h1 * 5 + 0x52dce729;\n\t\tk2 *= c2, k2 = ROTL64(k2, 33), k2 *= c1;\n\t\th2 ^= k2, h2 = ROTL64(h2, 31), h2 += h1;\n\t\th2 = h2 * 5 + 0x38495ab5;\n\t}\n\n\t// tail\n\tif (offset < size)\n\t{\n\t\tuint64_t tail[2] = {};\n\t\tmemcpy(tail, static_cast(data) + offset, size - offset);\n\n\t\tuint64_t k1 = tail[0], k2 = tail[1];\n\n\t\tk1 *= c1, k1 = ROTL64(k1, 31), k1 *= c2;\n\t\th1 ^= k1;\n\t\tk2 *= c2, k2 = ROTL64(k2, 33), k2 *= c1;\n\t\th2 ^= k2;\n\t}\n\n\th1 ^= size;\n\th2 ^= size;\n\n\thash[0] = h1;\n\thash[1] = h2;\n\n#undef ROTL64\n}\n\nvoid hashMesh(Mesh& mesh)\n{\n\tmesh.geometry_hash[0] = mesh.geometry_hash[1] = 41;\n\n\tfor (size_t i = 0; i < mesh.streams.size(); ++i)\n\t{\n\t\tconst Stream& stream = mesh.streams[i];\n\n\t\tint meta[3] = {stream.type, stream.index, stream.target};\n\t\thashUpdate(mesh.geometry_hash, meta, sizeof(meta));\n\n\t\tif (stream.custom_name)\n\t\t\thashUpdate(mesh.geometry_hash, stream.custom_name, strlen(stream.custom_name));\n\n\t\thashUpdate(mesh.geometry_hash, stream.data.data(), stream.data.size() * sizeof(Attr));\n\t}\n\n\tif (!mesh.indices.empty())\n\t\thashUpdate(mesh.geometry_hash, mesh.indices.data(), mesh.indices.size() * sizeof(unsigned int));\n\n\tint meta[4] = {int(mesh.streams.size()), mesh.streams.empty() ? 0 : int(mesh.streams[0].data.size()), int(mesh.indices.size()), mesh.type};\n\thashUpdate(mesh.geometry_hash, meta, sizeof(meta));\n}\n\nstatic bool canDedupMesh(const Mesh& mesh, const Settings& settings)\n{\n\t// empty mesh\n\tif (mesh.streams.empty())\n\t\treturn false;\n\n\t// world-space mesh\n\tif (mesh.nodes.empty() && mesh.instances.empty())\n\t\treturn false;\n\n\t// has extras\n\tif (settings.keep_extras && mesh.extras.data)\n\t\treturn false;\n\n\t// to simplify dedup we ignore complex target setups for now\n\tif (!mesh.target_weights.empty() || !mesh.target_names.empty() || !mesh.variants.empty())\n\t\treturn false;\n\n\treturn true;\n}\n\nvoid dedupMeshes(std::vector& meshes, const Settings& settings)\n{\n\tstd::unordered_map hashes;\n\n\tfor (size_t i = 0; i < meshes.size(); ++i)\n\t{\n\t\tMesh& mesh = meshes[i];\n\n\t\thashMesh(mesh);\n\t\thashes[mesh.geometry_hash[0] ^ mesh.geometry_hash[1]]++;\n\t}\n\n\tfor (size_t i = 0; i < meshes.size(); ++i)\n\t{\n\t\tMesh& target = meshes[i];\n\n\t\tif (!canDedupMesh(target, settings))\n\t\t\tcontinue;\n\n\t\tif (hashes[target.geometry_hash[0] ^ target.geometry_hash[1]] <= 1)\n\t\t\tcontinue;\n\n\t\tfor (size_t j = i + 1; j < meshes.size(); ++j)\n\t\t{\n\t\t\tMesh& mesh = meshes[j];\n\n\t\t\tif (mesh.geometry_hash[0] != target.geometry_hash[0] || mesh.geometry_hash[1] != target.geometry_hash[1])\n\t\t\t\tcontinue;\n\n\t\t\tif (!canDedupMesh(mesh, settings))\n\t\t\t\tcontinue;\n\n\t\t\tif (mesh.scene != target.scene || mesh.material != target.material || mesh.skin != target.skin)\n\t\t\t{\n\t\t\t\t// mark both meshes as having duplicate geometry; we don't use this in dedupMeshes but it's useful later in the pipeline\n\t\t\t\ttarget.geometry_duplicate = true;\n\t\t\t\tmesh.geometry_duplicate = true;\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\t// basic sanity test; these should be included in geometry hash\n\t\t\tassert(mesh.streams.size() == target.streams.size());\n\t\t\tassert(mesh.streams[0].data.size() == target.streams[0].data.size());\n\t\t\tassert(mesh.indices.size() == target.indices.size());\n\n\t\t\ttarget.nodes.insert(target.nodes.end(), mesh.nodes.begin(), mesh.nodes.end());\n\t\t\ttarget.instances.insert(target.instances.end(), mesh.instances.begin(), mesh.instances.end());\n\n\t\t\tmesh.streams.clear();\n\t\t\tmesh.indices.clear();\n\t\t\tmesh.nodes.clear();\n\t\t\tmesh.instances.clear();\n\t\t}\n\t}\n\n\tfor (size_t i = 0; i < meshes.size(); ++i)\n\t{\n\t\tMesh& target = meshes[i];\n\t\tif (target.nodes.size() <= 1)\n\t\t\tcontinue;\n\n\t\tstd::sort(target.nodes.begin(), target.nodes.end());\n\t\ttarget.nodes.erase(std::unique(target.nodes.begin(), target.nodes.end()), target.nodes.end());\n\t}\n}\n\nvoid mergeMeshInstances(Mesh& mesh)\n{\n\tif (mesh.nodes.empty())\n\t\treturn;\n\n\t// fast-path: for single instance meshes we transform in-place\n\tif (mesh.nodes.size() == 1)\n\t{\n\t\ttransformMesh(mesh, mesh, mesh.nodes[0]);\n\t\tmesh.nodes.clear();\n\t\treturn;\n\t}\n\n\tMesh base = mesh;\n\tMesh transformed = base;\n\n\tfor (size_t i = 0; i < mesh.streams.size(); ++i)\n\t{\n\t\tmesh.streams[i].data.clear();\n\t\tmesh.streams[i].data.reserve(base.streams[i].data.size() * mesh.nodes.size());\n\t}\n\n\tmesh.indices.clear();\n\tmesh.indices.reserve(base.indices.size() * mesh.nodes.size());\n\n\tfor (size_t i = 0; i < mesh.nodes.size(); ++i)\n\t{\n\t\ttransformMesh(transformed, base, mesh.nodes[i]);\n\t\tmergeMeshes(mesh, transformed);\n\t}\n\n\tmesh.nodes.clear();\n}\n\nvoid mergeMeshes(std::vector& meshes, const Settings& settings)\n{\n\tfor (size_t i = 0; i < meshes.size(); ++i)\n\t{\n\t\tMesh& target = meshes[i];\n\n\t\tif (target.streams.empty())\n\t\t\tcontinue;\n\n\t\tsize_t target_vertices = target.streams[0].data.size();\n\t\tsize_t target_indices = target.indices.size();\n\n\t\tsize_t last_merged = i;\n\n\t\tfor (size_t j = i + 1; j < meshes.size(); ++j)\n\t\t{\n\t\t\tMesh& mesh = meshes[j];\n\n\t\t\tif (!mesh.streams.empty() && canMergeMeshes(target, mesh, settings))\n\t\t\t{\n\t\t\t\ttarget_vertices += mesh.streams[0].data.size();\n\t\t\t\ttarget_indices += mesh.indices.size();\n\t\t\t\tlast_merged = j;\n\t\t\t}\n\t\t}\n\n\t\tfor (size_t j = 0; j < target.streams.size(); ++j)\n\t\t\ttarget.streams[j].data.reserve(target_vertices);\n\n\t\ttarget.indices.reserve(target_indices);\n\n\t\tfor (size_t j = i + 1; j <= last_merged; ++j)\n\t\t{\n\t\t\tMesh& mesh = meshes[j];\n\n\t\t\tif (!mesh.streams.empty() && canMergeMeshes(target, mesh, settings))\n\t\t\t{\n\t\t\t\tmergeMeshes(target, mesh);\n\n\t\t\t\tmesh.streams.clear();\n\t\t\t\tmesh.indices.clear();\n\t\t\t\tmesh.nodes.clear();\n\t\t\t\tmesh.instances.clear();\n\t\t\t}\n\t\t}\n\n\t\tassert(target.streams[0].data.size() == target_vertices);\n\t\tassert(target.indices.size() == target_indices);\n\t}\n}\n\nvoid filterEmptyMeshes(std::vector& meshes)\n{\n\tsize_t write = 0;\n\n\tfor (size_t i = 0; i < meshes.size(); ++i)\n\t{\n\t\tMesh& mesh = meshes[i];\n\n\t\tif (mesh.streams.empty())\n\t\t\tcontinue;\n\n\t\tif (mesh.streams[0].data.empty())\n\t\t\tcontinue;\n\n\t\tif (mesh.type != cgltf_primitive_type_points && mesh.indices.empty())\n\t\t\tcontinue;\n\n\t\t// the following code is roughly equivalent to meshes[write] = std::move(mesh)\n\t\tstd::vector streams;\n\t\tstreams.swap(mesh.streams);\n\n\t\tstd::vector indices;\n\t\tindices.swap(mesh.indices);\n\n\t\tmeshes[write] = mesh;\n\t\tmeshes[write].streams.swap(streams);\n\t\tmeshes[write].indices.swap(indices);\n\n\t\twrite++;\n\t}\n\n\tmeshes.resize(write);\n}\n\nstatic bool isConstant(const std::vector& data, const Attr& value, float tolerance = 0.01f)\n{\n\tfor (size_t i = 0; i < data.size(); ++i)\n\t{\n\t\tconst Attr& a = data[i];\n\n\t\tif (fabsf(a.f[0] - value.f[0]) > tolerance || fabsf(a.f[1] - value.f[1]) > tolerance || fabsf(a.f[2] - value.f[2]) > tolerance || fabsf(a.f[3] - value.f[3]) > tolerance)\n\t\t\treturn false;\n\t}\n\n\treturn true;\n}\n\nvoid filterStreams(Mesh& mesh, const MaterialInfo& mi)\n{\n\tbool morph_normal = false;\n\tbool morph_tangent = false;\n\tint keep_texture_set = -1;\n\n\tfor (size_t i = 0; i < mesh.streams.size(); ++i)\n\t{\n\t\tStream& stream = mesh.streams[i];\n\n\t\tif (stream.target)\n\t\t{\n\t\t\tmorph_normal = morph_normal || (stream.type == cgltf_attribute_type_normal && !isConstant(stream.data, {0, 0, 0, 0}));\n\t\t\tmorph_tangent = morph_tangent || (stream.type == cgltf_attribute_type_tangent && !isConstant(stream.data, {0, 0, 0, 0}));\n\t\t}\n\n\t\tif (stream.type == cgltf_attribute_type_texcoord && stream.index < 32 && (mi.texture_set_mask & (1u << stream.index)) != 0)\n\t\t{\n\t\t\tkeep_texture_set = std::max(keep_texture_set, stream.index);\n\t\t}\n\t}\n\n\tsize_t write = 0;\n\n\tfor (size_t i = 0; i < mesh.streams.size(); ++i)\n\t{\n\t\tStream& stream = mesh.streams[i];\n\n\t\tif (stream.type == cgltf_attribute_type_texcoord && stream.index > keep_texture_set)\n\t\t\tcontinue;\n\n\t\tif (stream.type == cgltf_attribute_type_normal && mi.unlit)\n\t\t\tcontinue;\n\n\t\tif (stream.type == cgltf_attribute_type_tangent && !mi.needs_tangents)\n\t\t\tcontinue;\n\n\t\tif ((stream.type == cgltf_attribute_type_joints || stream.type == cgltf_attribute_type_weights) && !mesh.skin)\n\t\t\tcontinue;\n\n\t\tif (stream.type == cgltf_attribute_type_color && isConstant(stream.data, {1, 1, 1, 1}))\n\t\t\tcontinue;\n\n\t\tif (stream.target && stream.type == cgltf_attribute_type_normal && !morph_normal)\n\t\t\tcontinue;\n\n\t\tif (stream.target && stream.type == cgltf_attribute_type_tangent && !morph_tangent)\n\t\t\tcontinue;\n\n\t\tif (mesh.type == cgltf_primitive_type_points && stream.type == cgltf_attribute_type_normal && !stream.data.empty() && isConstant(stream.data, stream.data[0]))\n\t\t\tcontinue;\n\n\t\t// the following code is roughly equivalent to streams[write] = std::move(stream)\n\t\tstd::vector data;\n\t\tdata.swap(stream.data);\n\n\t\tmesh.streams[write] = stream;\n\t\tmesh.streams[write].data.swap(data);\n\n\t\twrite++;\n\t}\n\n\tmesh.streams.resize(write);\n}\n\nstruct QuantizedTBN\n{\n\tint8_t nx, ny, nz, nw;\n\tint8_t tx, ty, tz, tw;\n};\n\nstatic void quantizeTBN(QuantizedTBN* target, size_t offset, const Attr* source, size_t size, int bits)\n{\n\tint8_t* target8 = reinterpret_cast(target) + offset;\n\n\tfor (size_t i = 0; i < size; ++i)\n\t{\n\t\ttarget8[i * sizeof(QuantizedTBN) + 0] = int8_t(meshopt_quantizeSnorm(source[i].f[0], bits));\n\t\ttarget8[i * sizeof(QuantizedTBN) + 1] = int8_t(meshopt_quantizeSnorm(source[i].f[1], bits));\n\t\ttarget8[i * sizeof(QuantizedTBN) + 2] = int8_t(meshopt_quantizeSnorm(source[i].f[2], bits));\n\t\ttarget8[i * sizeof(QuantizedTBN) + 3] = int8_t(meshopt_quantizeSnorm(source[i].f[3], bits));\n\t}\n}\n\nstatic void reindexMesh(Mesh& mesh, bool quantize_tbn)\n{\n\tsize_t total_vertices = mesh.streams[0].data.size();\n\tsize_t total_indices = mesh.indices.size();\n\n\tstd::vector qtbn;\n\n\tstd::vector streams;\n\tfor (size_t i = 0; i < mesh.streams.size(); ++i)\n\t{\n\t\tconst Stream& attr = mesh.streams[i];\n\t\tif (attr.target)\n\t\t\tcontinue;\n\n\t\tassert(attr.data.size() == total_vertices);\n\n\t\tif (quantize_tbn && (attr.type == cgltf_attribute_type_normal || attr.type == cgltf_attribute_type_tangent))\n\t\t{\n\t\t\tif (qtbn.empty())\n\t\t\t{\n\t\t\t\tqtbn.resize(total_vertices);\n\n\t\t\t\tmeshopt_Stream stream = {&qtbn[0], sizeof(QuantizedTBN), sizeof(QuantizedTBN)};\n\t\t\t\tstreams.push_back(stream);\n\t\t\t}\n\n\t\t\tsize_t offset = attr.type == cgltf_attribute_type_normal ? offsetof(QuantizedTBN, nx) : offsetof(QuantizedTBN, tx);\n\t\t\tquantizeTBN(&qtbn[0], offset, &attr.data[0], total_vertices, /* bits= */ 8);\n\t\t}\n\t\telse\n\t\t{\n\t\t\tmeshopt_Stream stream = {&attr.data[0], sizeof(Attr), sizeof(Attr)};\n\t\t\tstreams.push_back(stream);\n\t\t}\n\t}\n\n\tif (streams.empty())\n\t\treturn;\n\n\tstd::vector remap(total_vertices);\n\tsize_t unique_vertices = meshopt_generateVertexRemapMulti(&remap[0], &mesh.indices[0], total_indices, total_vertices, &streams[0], streams.size());\n\tassert(unique_vertices <= total_vertices);\n\n\tmeshopt_remapIndexBuffer(&mesh.indices[0], &mesh.indices[0], total_indices, &remap[0]);\n\n\tfor (size_t i = 0; i < mesh.streams.size(); ++i)\n\t{\n\t\tassert(mesh.streams[i].data.size() == total_vertices);\n\n\t\tmeshopt_remapVertexBuffer(&mesh.streams[i].data[0], &mesh.streams[i].data[0], total_vertices, sizeof(Attr), &remap[0]);\n\t\tmesh.streams[i].data.resize(unique_vertices);\n\t}\n}\n\nstatic void filterTriangles(Mesh& mesh)\n{\n\tassert(mesh.type == cgltf_primitive_type_triangles);\n\n\tunsigned int* indices = &mesh.indices[0];\n\tsize_t total_indices = mesh.indices.size();\n\n\tsize_t write = 0;\n\n\tfor (size_t i = 0; i < total_indices; i += 3)\n\t{\n\t\tunsigned int a = indices[i + 0], b = indices[i + 1], c = indices[i + 2];\n\n\t\tif (a != b && a != c && b != c)\n\t\t{\n\t\t\tindices[write + 0] = a;\n\t\t\tindices[write + 1] = b;\n\t\t\tindices[write + 2] = c;\n\t\t\twrite += 3;\n\t\t}\n\t}\n\n\tmesh.indices.resize(write);\n}\n\nstatic void simplifyAttributes(std::vector& attrs, float* attrw, size_t stride, Mesh& mesh)\n{\n\tassert(stride >= 6); // normal + color\n\n\tsize_t vertex_count = mesh.streams[0].data.size();\n\n\tattrs.resize(vertex_count * stride);\n\tfloat* data = attrs.data();\n\n\tif (const Stream* attr = getStream(mesh, cgltf_attribute_type_normal))\n\t{\n\t\tconst Attr* a = attr->data.data();\n\n\t\tfor (size_t i = 0; i < vertex_count; ++i)\n\t\t{\n\t\t\tdata[i * stride + 0] = a[i].f[0];\n\t\t\tdata[i * stride + 1] = a[i].f[1];\n\t\t\tdata[i * stride + 2] = a[i].f[2];\n\t\t}\n\n\t\tattrw[0] = attrw[1] = attrw[2] = 0.5f;\n\t}\n\n\tif (const Stream* attr = getStream(mesh, cgltf_attribute_type_color))\n\t{\n\t\tconst Attr* a = attr->data.data();\n\n\t\tfor (size_t i = 0; i < vertex_count; ++i)\n\t\t{\n\t\t\tdata[i * stride + 3] = a[i].f[0] * a[i].f[3];\n\t\t\tdata[i * stride + 4] = a[i].f[1] * a[i].f[3];\n\t\t\tdata[i * stride + 5] = a[i].f[2] * a[i].f[3];\n\t\t}\n\n\t\tattrw[3] = attrw[4] = attrw[5] = 1.0f;\n\t}\n}\n\nstatic void simplifyProtect(std::vector& locks, Mesh& mesh, size_t presplit_vertices)\n{\n\tconst Stream* positions = getStream(mesh, cgltf_attribute_type_position);\n\tassert(positions);\n\n\tsize_t vertex_count = positions->data.size();\n\n\tlocks.resize(vertex_count);\n\tunsigned char* data = locks.data();\n\n\tstd::vector remap(vertex_count);\n\tmeshopt_generatePositionRemap(&remap[0], positions->data[0].f, vertex_count, sizeof(Attr));\n\n\t// protect UV discontinuities\n\tif (Stream* attr = getStream(mesh, cgltf_attribute_type_texcoord))\n\t{\n\t\tAttr* a = attr->data.data();\n\n\t\tfor (size_t i = 0; i < vertex_count; ++i)\n\t\t{\n\t\t\tunsigned int r = remap[i];\n\n\t\t\tif (r != i && (a[i].f[0] != a[r].f[0] || a[i].f[1] != a[r].f[1]))\n\t\t\t\tdata[i] |= meshopt_SimplifyVertex_Protect;\n\t\t}\n\t}\n\t// protect all vertices that were artificially split on the UV mirror edges\n\tfor (size_t i = presplit_vertices; i < vertex_count; ++i)\n\t\tdata[i] |= meshopt_SimplifyVertex_Protect;\n}\n\nstatic void simplifyUvSplit(Mesh& mesh, std::vector& remap)\n{\n\tassert(mesh.type == cgltf_primitive_type_triangles);\n\tassert(!mesh.indices.empty());\n\n\tconst Stream* uv = getStream(mesh, cgltf_attribute_type_texcoord);\n\tif (!uv)\n\t\treturn;\n\n\tsize_t vertex_count = uv->data.size();\n\n\tstd::vector uvsign(mesh.indices.size() / 3);\n\tstd::vector flipseam(vertex_count);\n\n\tfor (size_t i = 0; i < mesh.indices.size(); i += 3)\n\t{\n\t\tunsigned int a = mesh.indices[i + 0];\n\t\tunsigned int b = mesh.indices[i + 1];\n\t\tunsigned int c = mesh.indices[i + 2];\n\n\t\tconst Attr& va = uv->data[a];\n\t\tconst Attr& vb = uv->data[b];\n\t\tconst Attr& vc = uv->data[c];\n\n\t\tfloat uvarea = (vb.f[0] - va.f[0]) * (vc.f[1] - va.f[1]) - (vc.f[0] - va.f[0]) * (vb.f[1] - va.f[1]);\n\t\tunsigned char flag = uvarea > 0 ? 1 : (uvarea < 0 ? 2 : 0);\n\n\t\tuvsign[i / 3] = flag;\n\t\tflipseam[a] |= flag;\n\t\tflipseam[b] |= flag;\n\t\tflipseam[c] |= flag;\n\t}\n\n\tstd::vector split(vertex_count);\n\tsize_t splits = 0;\n\n\tremap.resize(vertex_count);\n\n\tfor (size_t i = 0; i < vertex_count; ++i)\n\t{\n\t\tremap[i] = unsigned(i);\n\n\t\tif (flipseam[i] == 3)\n\t\t{\n\t\t\tassert(remap.size() == vertex_count + splits);\n\t\t\tremap.push_back(unsigned(i));\n\n\t\t\tsplit[i] = unsigned(vertex_count + splits);\n\t\t\tsplits++;\n\n\t\t\tfor (size_t k = 0; k < mesh.streams.size(); ++k)\n\t\t\t\tmesh.streams[k].data.push_back(mesh.streams[k].data[i]);\n\t\t}\n\t}\n\n\tfor (size_t i = 0; i < mesh.indices.size(); i += 3)\n\t{\n\t\tunsigned int a = mesh.indices[i + 0];\n\t\tunsigned int b = mesh.indices[i + 1];\n\t\tunsigned int c = mesh.indices[i + 2];\n\n\t\tunsigned char sign = uvsign[i / 3];\n\n\t\tif (flipseam[a] == 3 && sign == 2)\n\t\t\tmesh.indices[i + 0] = split[a];\n\t\tif (flipseam[b] == 3 && sign == 2)\n\t\t\tmesh.indices[i + 1] = split[b];\n\t\tif (flipseam[c] == 3 && sign == 2)\n\t\t\tmesh.indices[i + 2] = split[c];\n\t}\n}\n\nstatic void simplifyMesh(Mesh& mesh, float threshold, float error, bool attributes, bool aggressive, bool lock_borders, bool permissive)\n{\n\tassert(mesh.type == cgltf_primitive_type_triangles);\n\n\tif (mesh.indices.empty())\n\t\treturn;\n\n\tconst Stream* positions = getStream(mesh, cgltf_attribute_type_position);\n\tif (!positions)\n\t\treturn;\n\n\tsize_t presplit_vertices = positions->data.size();\n\n\tstd::vector uvremap;\n\tif (attributes)\n\t\tsimplifyUvSplit(mesh, uvremap);\n\n\tsize_t vertex_count = positions->data.size();\n\n\tsize_t target_index_count = size_t(double(size_t(mesh.indices.size() / 3)) * threshold) * 3;\n\tfloat target_error = error;\n\tfloat target_error_aggressive = 1e-1f;\n\n\tunsigned int options = 0;\n\tif (lock_borders)\n\t\toptions |= meshopt_SimplifyLockBorder;\n\telse\n\t\toptions |= meshopt_SimplifyPrune;\n\n\tif (permissive)\n\t\toptions |= meshopt_SimplifyPermissive;\n\n\tif (mesh.targets || getStream(mesh, cgltf_attribute_type_weights))\n\t\toptions |= meshopt_SimplifyRegularize;\n\n\tstd::vector indices(mesh.indices.size());\n\n\tfloat attrw[6] = {};\n\tstd::vector attrs;\n\tif (attributes)\n\t\tsimplifyAttributes(attrs, attrw, sizeof(attrw) / sizeof(attrw[0]), mesh);\n\n\tstd::vector locks;\n\tif (attributes && permissive)\n\t\tsimplifyProtect(locks, mesh, presplit_vertices);\n\n\tif (attributes)\n\t\tindices.resize(meshopt_simplifyWithAttributes(&indices[0], &mesh.indices[0], mesh.indices.size(), positions->data[0].f, vertex_count, sizeof(Attr),\n\t\t attrs.data(), sizeof(attrw), attrw, sizeof(attrw) / sizeof(attrw[0]), permissive ? locks.data() : NULL, target_index_count, target_error, options));\n\telse\n\t\tindices.resize(meshopt_simplify(&indices[0], &mesh.indices[0], mesh.indices.size(), positions->data[0].f, vertex_count, sizeof(Attr), target_index_count, target_error, options));\n\n\tmesh.indices.swap(indices);\n\n\t// Note: if the simplifier got stuck, we can try to reindex without normals/tangents and retry\n\t// For now we simply fall back to aggressive simplifier instead\n\n\t// if the precise simplifier got \"stuck\", we'll try to simplify using the sloppy simplifier; this is only used when aggressive simplification is enabled as it breaks attribute discontinuities\n\tif (aggressive && mesh.indices.size() > target_index_count)\n\t{\n\t\tindices.resize(meshopt_simplifySloppy(&indices[0], &mesh.indices[0], mesh.indices.size(), positions->data[0].f, vertex_count, sizeof(Attr), target_index_count, target_error_aggressive));\n\t\tmesh.indices.swap(indices);\n\t}\n\n\tif (uvremap.size() && mesh.indices.size())\n\t\tmeshopt_remapIndexBuffer(&mesh.indices[0], &mesh.indices[0], mesh.indices.size(), &uvremap[0]);\n}\n\nstatic void optimizeMesh(Mesh& mesh, bool compressmore)\n{\n\tassert(mesh.type == cgltf_primitive_type_triangles);\n\n\tif (mesh.indices.empty())\n\t\treturn;\n\n\tsize_t vertex_count = mesh.streams[0].data.size();\n\n\tif (compressmore)\n\t\tmeshopt_optimizeVertexCacheStrip(&mesh.indices[0], &mesh.indices[0], mesh.indices.size(), vertex_count);\n\telse\n\t\tmeshopt_optimizeVertexCache(&mesh.indices[0], &mesh.indices[0], mesh.indices.size(), vertex_count);\n\n\tstd::vector remap(vertex_count);\n\tsize_t unique_vertices = meshopt_optimizeVertexFetchRemap(&remap[0], &mesh.indices[0], mesh.indices.size(), vertex_count);\n\tassert(unique_vertices <= vertex_count);\n\n\tmeshopt_remapIndexBuffer(&mesh.indices[0], &mesh.indices[0], mesh.indices.size(), &remap[0]);\n\n\tfor (size_t i = 0; i < mesh.streams.size(); ++i)\n\t{\n\t\tassert(mesh.streams[i].data.size() == vertex_count);\n\n\t\tmeshopt_remapVertexBuffer(&mesh.streams[i].data[0], &mesh.streams[i].data[0], vertex_count, sizeof(Attr), &remap[0]);\n\t\tmesh.streams[i].data.resize(unique_vertices);\n\t}\n}\n\nstruct BoneInfluence\n{\n\tfloat i;\n\tfloat w;\n};\n\nstruct BoneInfluenceWeightPredicate\n{\n\tbool operator()(const BoneInfluence& lhs, const BoneInfluence& rhs) const\n\t{\n\t\treturn lhs.w > rhs.w;\n\t}\n};\n\nstatic void filterBones(Mesh& mesh)\n{\n\tconst int kMaxGroups = 8;\n\n\tstd::pair groups[kMaxGroups];\n\tint group_count = 0;\n\n\t// gather all joint/weight groups; each group contains 4 bone influences\n\tfor (int i = 0; i < kMaxGroups; ++i)\n\t{\n\t\tStream* jg = getStream(mesh, cgltf_attribute_type_joints, int(i));\n\t\tStream* wg = getStream(mesh, cgltf_attribute_type_weights, int(i));\n\n\t\tif (!jg || !wg)\n\t\t\tbreak;\n\n\t\tgroups[group_count++] = std::make_pair(jg, wg);\n\t}\n\n\tif (group_count == 0)\n\t\treturn;\n\n\t// weights below cutoff can't be represented in quantized 8-bit storage\n\tconst float weight_cutoff = 0.5f / 255.f;\n\n\tsize_t vertex_count = mesh.streams[0].data.size();\n\n\tBoneInfluence inf[kMaxGroups * 4] = {};\n\n\tfor (size_t i = 0; i < vertex_count; ++i)\n\t{\n\t\tint count = 0;\n\n\t\t// gather all bone influences for this vertex\n\t\tfor (int j = 0; j < group_count; ++j)\n\t\t{\n\t\t\tconst Attr& ja = groups[j].first->data[i];\n\t\t\tconst Attr& wa = groups[j].second->data[i];\n\n\t\t\tfor (int k = 0; k < 4; ++k)\n\t\t\t\tif (wa.f[k] > weight_cutoff)\n\t\t\t\t{\n\t\t\t\t\tinf[count].i = ja.f[k];\n\t\t\t\t\tinf[count].w = wa.f[k];\n\t\t\t\t\tcount++;\n\t\t\t\t}\n\t\t}\n\n\t\t// pick top 4 influences; this also sorts resulting influences by weight which helps renderers that use influence subset in shader LODs\n\t\tstd::sort(inf, inf + count, BoneInfluenceWeightPredicate());\n\n\t\t// copy the top 4 influences back into stream 0 - we will remove other streams at the end\n\t\tAttr& ja = groups[0].first->data[i];\n\t\tAttr& wa = groups[0].second->data[i];\n\n\t\tfor (int k = 0; k < 4; ++k)\n\t\t{\n\t\t\tif (k < count)\n\t\t\t{\n\t\t\t\tja.f[k] = inf[k].i;\n\t\t\t\twa.f[k] = inf[k].w;\n\t\t\t}\n\t\t\telse\n\t\t\t{\n\t\t\t\tja.f[k] = 0.f;\n\t\t\t\twa.f[k] = 0.f;\n\t\t\t}\n\t\t}\n\t}\n\n\t// remove redundant weight/joint streams\n\tfor (size_t i = 0; i < mesh.streams.size();)\n\t{\n\t\tStream& s = mesh.streams[i];\n\n\t\tif ((s.type == cgltf_attribute_type_joints || s.type == cgltf_attribute_type_weights) && s.index > 0)\n\t\t\tmesh.streams.erase(mesh.streams.begin() + i);\n\t\telse\n\t\t\t++i;\n\t}\n}\n\nstatic void simplifyPointMesh(Mesh& mesh, float threshold)\n{\n\tassert(mesh.type == cgltf_primitive_type_points);\n\n\tif (threshold >= 1)\n\t\treturn;\n\n\tconst Stream* positions = getStream(mesh, cgltf_attribute_type_position);\n\tif (!positions)\n\t\treturn;\n\n\tconst Stream* colors = getStream(mesh, cgltf_attribute_type_color);\n\n\tsize_t vertex_count = mesh.streams[0].data.size();\n\n\tsize_t target_vertex_count = size_t(double(vertex_count) * threshold);\n\n\tconst float color_weight = 1;\n\n\tstd::vector indices(target_vertex_count);\n\tif (target_vertex_count)\n\t\tindices.resize(meshopt_simplifyPoints(&indices[0], positions->data[0].f, vertex_count, sizeof(Attr), colors ? colors->data[0].f : NULL, sizeof(Attr), color_weight, target_vertex_count));\n\n\tstd::vector scratch(indices.size());\n\n\tfor (size_t i = 0; i < mesh.streams.size(); ++i)\n\t{\n\t\tstd::vector& data = mesh.streams[i].data;\n\n\t\tassert(data.size() == vertex_count);\n\n\t\tfor (size_t j = 0; j < indices.size(); ++j)\n\t\t\tscratch[j] = data[indices[j]];\n\n\t\tdata = scratch;\n\t}\n}\n\nstatic void sortPointMesh(Mesh& mesh)\n{\n\tassert(mesh.type == cgltf_primitive_type_points);\n\n\tconst Stream* positions = getStream(mesh, cgltf_attribute_type_position);\n\tif (!positions)\n\t\treturn;\n\n\t// skip spatial sort in presence of custom attributes, since when they refer to mesh features their order is more important to preserve for compression efficiency\n\tif (getStream(mesh, cgltf_attribute_type_custom))\n\t\treturn;\n\n\tsize_t vertex_count = mesh.streams[0].data.size();\n\n\tstd::vector remap(vertex_count);\n\tmeshopt_spatialSortRemap(&remap[0], positions->data[0].f, vertex_count, sizeof(Attr));\n\n\tfor (size_t i = 0; i < mesh.streams.size(); ++i)\n\t{\n\t\tassert(mesh.streams[i].data.size() == vertex_count);\n\n\t\tmeshopt_remapVertexBuffer(&mesh.streams[i].data[0], &mesh.streams[i].data[0], vertex_count, sizeof(Attr), &remap[0]);\n\t}\n}\n\nvoid processMesh(Mesh& mesh, const Settings& settings)\n{\n\tswitch (mesh.type)\n\t{\n\tcase cgltf_primitive_type_points:\n\t\tassert(mesh.indices.empty());\n\t\tsimplifyPointMesh(mesh, settings.simplify_ratio);\n\t\tsortPointMesh(mesh);\n\t\tbreak;\n\n\tcase cgltf_primitive_type_lines:\n\t\tbreak;\n\n\tcase cgltf_primitive_type_triangles:\n\t\tfilterBones(mesh);\n\t\treindexMesh(mesh, settings.quantize && !settings.nrm_float);\n\t\tfilterTriangles(mesh);\n\n\t\tif (settings.simplify_ratio < 1)\n\t\t{\n\t\t\tfloat error = settings.simplify_scaled ? settings.simplify_error / mesh.quality : settings.simplify_error;\n\t\t\tsimplifyMesh(mesh, settings.simplify_ratio, error, settings.simplify_attributes, settings.simplify_aggressive, settings.simplify_lock_borders, settings.simplify_permissive);\n\t\t}\n\n\t\toptimizeMesh(mesh, settings.compressmore);\n\t\tbreak;\n\n\tdefault:\n\t\tassert(!\"Unknown primitive type\");\n\t}\n}\n\nstatic float getScale(const float* transform)\n{\n\tfloat translation[3], rotation[4], scale[3];\n\tdecomposeTransform(translation, rotation, scale, transform);\n\n\tfloat sx = fabsf(scale[0]), sy = fabsf(scale[1]), sz = fabsf(scale[2]);\n\treturn std::max(std::max(sx, sy), sz);\n}\n\nvoid computeMeshQuality(std::vector& meshes)\n{\n\tstd::vector scales(meshes.size(), 1.f);\n\tfloat maxscale = 0.f;\n\n\tfor (size_t i = 0; i < meshes.size(); ++i)\n\t{\n\t\tMesh& mesh = meshes[i];\n\n\t\tconst Stream* positions = getStream(mesh, cgltf_attribute_type_position);\n\t\tif (!positions)\n\t\t\tcontinue;\n\n\t\tfloat geometry_scale = meshopt_simplifyScale(positions->data[0].f, positions->data.size(), sizeof(Attr));\n\t\tfloat node_maxscale = 0.f;\n\n\t\tfor (cgltf_node* node : mesh.nodes)\n\t\t{\n\t\t\tfloat transform[16];\n\t\t\tcgltf_node_transform_world(node, transform);\n\n\t\t\tnode_maxscale = std::max(node_maxscale, getScale(transform));\n\t\t}\n\n\t\tfor (const Instance& xf : mesh.instances)\n\t\t\tnode_maxscale = std::max(node_maxscale, getScale(xf.transform));\n\n\t\tscales[i] = node_maxscale == 0.f ? geometry_scale : node_maxscale * geometry_scale;\n\t\tmaxscale = std::max(maxscale, scales[i]);\n\t}\n\n\tfor (size_t i = 0; i < meshes.size(); ++i)\n\t\tmeshes[i].quality = (scales[i] == 0.f || maxscale == 0.f) ? 1.f : scales[i] / maxscale;\n}\n\nbool hasVertexAlpha(const Mesh& mesh)\n{\n\tconst Stream* color = getStream(const_cast(mesh), cgltf_attribute_type_color);\n\tif (!color)\n\t\treturn false;\n\n\tfor (size_t i = 0; i < color->data.size(); ++i)\n\t\tif (color->data[i].f[3] < 1.f)\n\t\t\treturn true;\n\n\treturn false;\n}\n\nbool hasInstanceAlpha(const std::vector& instances)\n{\n\tfor (const Instance& instance : instances)\n\t\tif (instance.color[3] < 1.f)\n\t\t\treturn true;\n\n\treturn false;\n}\n" }, { "path": "gltf/node.cpp", "content": "// This file is part of gltfpack; see gltfpack.h for version/license details\n#include \"gltfpack.h\"\n\n#include \n#include \n\nvoid markScenes(cgltf_data* data, std::vector& nodes)\n{\n\tfor (size_t i = 0; i < nodes.size(); ++i)\n\t\tnodes[i].scene = -1;\n\n\tfor (size_t i = 0; i < data->scenes_count; ++i)\n\t\tfor (size_t j = 0; j < data->scenes[i].nodes_count; ++j)\n\t\t{\n\t\t\tNodeInfo& ni = nodes[data->scenes[i].nodes[j] - data->nodes];\n\n\t\t\tif (ni.scene >= 0)\n\t\t\t\tni.scene = -2; // multiple scenes\n\t\t\telse\n\t\t\t\tni.scene = int(i);\n\t\t}\n\n\tfor (size_t i = 0; i < data->nodes_count; ++i)\n\t{\n\t\tcgltf_node* root = &data->nodes[i];\n\t\twhile (root->parent)\n\t\t\troot = root->parent;\n\n\t\tnodes[i].scene = nodes[root - data->nodes].scene;\n\t}\n}\n\nvoid markAnimated(cgltf_data* data, std::vector& nodes, const std::vector& animations)\n{\n\tfor (size_t i = 0; i < animations.size(); ++i)\n\t{\n\t\tconst Animation& animation = animations[i];\n\n\t\tfor (size_t j = 0; j < animation.tracks.size(); ++j)\n\t\t{\n\t\t\tconst Track& track = animation.tracks[j];\n\n\t\t\t// mark nodes that have animation tracks that change their base transform as animated\n\t\t\tif (!track.dummy)\n\t\t\t{\n\t\t\t\tNodeInfo& ni = nodes[track.node - data->nodes];\n\n\t\t\t\tni.animated_path_mask |= (1 << track.path);\n\t\t\t}\n\t\t}\n\t}\n\n\tfor (size_t i = 0; i < data->nodes_count; ++i)\n\t{\n\t\tNodeInfo& ni = nodes[i];\n\n\t\tfor (cgltf_node* node = &data->nodes[i]; node; node = node->parent)\n\t\t\tni.animated |= nodes[node - data->nodes].animated_path_mask != 0;\n\t}\n}\n\nvoid markNeededNodes(cgltf_data* data, std::vector& nodes, const std::vector& meshes, const std::vector& animations, const Settings& settings)\n{\n\t// mark all joints as kept\n\tfor (size_t i = 0; i < data->skins_count; ++i)\n\t{\n\t\tconst cgltf_skin& skin = data->skins[i];\n\n\t\t// for now we keep all joints directly referenced by the skin and the entire ancestry tree; we keep names for joints as well\n\t\tfor (size_t j = 0; j < skin.joints_count; ++j)\n\t\t{\n\t\t\tNodeInfo& ni = nodes[skin.joints[j] - data->nodes];\n\n\t\t\tni.keep = true;\n\t\t}\n\t}\n\n\t// mark all animated nodes as kept\n\tfor (size_t i = 0; i < animations.size(); ++i)\n\t{\n\t\tconst Animation& animation = animations[i];\n\n\t\tfor (size_t j = 0; j < animation.tracks.size(); ++j)\n\t\t{\n\t\t\tconst Track& track = animation.tracks[j];\n\n\t\t\tif (settings.anim_const || !track.dummy)\n\t\t\t{\n\t\t\t\tNodeInfo& ni = nodes[track.node - data->nodes];\n\n\t\t\t\tni.keep = true;\n\t\t\t}\n\t\t}\n\t}\n\n\t// mark all mesh nodes as kept\n\tfor (size_t i = 0; i < meshes.size(); ++i)\n\t{\n\t\tconst Mesh& mesh = meshes[i];\n\n\t\tfor (size_t j = 0; j < mesh.nodes.size(); ++j)\n\t\t{\n\t\t\tNodeInfo& ni = nodes[mesh.nodes[j] - data->nodes];\n\n\t\t\tni.keep = true;\n\t\t}\n\t}\n\n\t// mark all light/camera nodes as kept\n\tfor (size_t i = 0; i < data->nodes_count; ++i)\n\t{\n\t\tconst cgltf_node& node = data->nodes[i];\n\n\t\tif (node.light || node.camera)\n\t\t{\n\t\t\tnodes[i].keep = true;\n\t\t}\n\t}\n\n\t// mark all named nodes as needed (if -kn is specified)\n\tif (settings.keep_nodes)\n\t{\n\t\tfor (size_t i = 0; i < data->nodes_count; ++i)\n\t\t{\n\t\t\tconst cgltf_node& node = data->nodes[i];\n\n\t\t\tif (node.name && *node.name)\n\t\t\t{\n\t\t\t\tnodes[i].keep = true;\n\t\t\t}\n\t\t}\n\t}\n}\n\nvoid remapNodes(cgltf_data* data, std::vector& nodes, size_t& node_offset)\n{\n\t// to keep a node, we currently need to keep the entire ancestry chain\n\tfor (size_t i = 0; i < data->nodes_count; ++i)\n\t{\n\t\tif (!nodes[i].keep)\n\t\t\tcontinue;\n\n\t\tfor (cgltf_node* node = &data->nodes[i]; node; node = node->parent)\n\t\t\tnodes[node - data->nodes].keep = true;\n\t}\n\n\t// generate sequential indices for all nodes; they aren't sorted topologically\n\tfor (size_t i = 0; i < data->nodes_count; ++i)\n\t{\n\t\tNodeInfo& ni = nodes[i];\n\n\t\tif (ni.keep)\n\t\t{\n\t\t\tni.remap = int(node_offset);\n\n\t\t\tnode_offset++;\n\t\t}\n\t}\n}\n\nvoid decomposeTransform(float translation[3], float rotation[4], float scale[3], const float* transform)\n{\n\tfloat m[4][4] = {};\n\tmemcpy(m, transform, 16 * sizeof(float));\n\n\t// extract translation from last row\n\ttranslation[0] = m[3][0];\n\ttranslation[1] = m[3][1];\n\ttranslation[2] = m[3][2];\n\n\t// compute determinant to determine handedness\n\tfloat det =\n\t m[0][0] * (m[1][1] * m[2][2] - m[2][1] * m[1][2]) -\n\t m[0][1] * (m[1][0] * m[2][2] - m[1][2] * m[2][0]) +\n\t m[0][2] * (m[1][0] * m[2][1] - m[1][1] * m[2][0]);\n\n\tfloat sign = (det < 0.f) ? -1.f : 1.f;\n\n\t// recover scale from axis lengths\n\tscale[0] = sqrtf(m[0][0] * m[0][0] + m[0][1] * m[0][1] + m[0][2] * m[0][2]) * sign;\n\tscale[1] = sqrtf(m[1][0] * m[1][0] + m[1][1] * m[1][1] + m[1][2] * m[1][2]) * sign;\n\tscale[2] = sqrtf(m[2][0] * m[2][0] + m[2][1] * m[2][1] + m[2][2] * m[2][2]) * sign;\n\n\t// normalize axes to get a pure rotation matrix\n\tfloat rsx = (scale[0] == 0.f) ? 0.f : 1.f / scale[0];\n\tfloat rsy = (scale[1] == 0.f) ? 0.f : 1.f / scale[1];\n\tfloat rsz = (scale[2] == 0.f) ? 0.f : 1.f / scale[2];\n\n\tfloat r00 = m[0][0] * rsx, r10 = m[1][0] * rsy, r20 = m[2][0] * rsz;\n\tfloat r01 = m[0][1] * rsx, r11 = m[1][1] * rsy, r21 = m[2][1] * rsz;\n\tfloat r02 = m[0][2] * rsx, r12 = m[1][2] * rsy, r22 = m[2][2] * rsz;\n\n\t// \"branchless\" version of Mike Day's matrix to quaternion conversion\n\tint qc = r22 < 0 ? (r00 > r11 ? 0 : 1) : (r00 < -r11 ? 2 : 3);\n\tfloat qs1 = qc & 2 ? -1.f : 1.f;\n\tfloat qs2 = qc & 1 ? -1.f : 1.f;\n\tfloat qs3 = (qc - 1) & 2 ? -1.f : 1.f;\n\n\tfloat qt = 1.f - qs3 * r00 - qs2 * r11 - qs1 * r22;\n\tfloat qs = 0.5f / sqrtf(qt);\n\n\trotation[qc ^ 0] = qs * qt;\n\trotation[qc ^ 1] = qs * (r01 + qs1 * r10);\n\trotation[qc ^ 2] = qs * (r20 + qs2 * r02);\n\trotation[qc ^ 3] = qs * (r12 + qs3 * r21);\n}\n" }, { "path": "gltf/package.json", "content": "{\n\t\"name\": \"gltfpack\",\n\t\"version\": \"1.0.0\",\n\t\"description\": \"A command-line tool that can optimize glTF files for size and speed\",\n\t\"author\": \"Arseny Kapoulkine\",\n\t\"license\": \"MIT\",\n\t\"bugs\": \"https://github.com/zeux/meshoptimizer/issues\",\n\t\"homepage\": \"https://github.com/zeux/meshoptimizer\",\n\t\"keywords\": [\n\t\t\"gltf\"\n\t],\n\t\"repository\": {\n\t\t\"type\": \"git\",\n\t\t\"url\": \"https://github.com/zeux/meshoptimizer\"\n\t},\n\t\"type\": \"module\",\n\t\"bin\": \"./cli.js\",\n\t\"main\": \"./library.js\",\n\t\"files\": [\n\t\t\"*.js\",\n\t\t\"*.wasm\"\n\t],\n\t\"scripts\": {\n\t\t\"prepublishOnly\": \"node cli.js -v\"\n\t},\n\t\"engines\": {\n\t\t\"node\": \">=18\"\n\t}\n}\n" }, { "path": "gltf/parsegltf.cpp", "content": "// This file is part of gltfpack; see gltfpack.h for version/license details\n#include \"gltfpack.h\"\n\n#include \n#include \n#include \n\n#include \"../src/meshoptimizer.h\"\n\nstatic const size_t kMaxStreams = 16;\n\nstatic const char* getError(cgltf_result result, cgltf_data* data)\n{\n\tswitch (result)\n\t{\n\tcase cgltf_result_file_not_found:\n\t\treturn data ? \"resource not found\" : \"file not found\";\n\n\tcase cgltf_result_io_error:\n\t\treturn \"I/O error\";\n\n\tcase cgltf_result_invalid_json:\n\t\treturn \"invalid JSON\";\n\n\tcase cgltf_result_invalid_gltf:\n\t\treturn \"invalid GLTF\";\n\n\tcase cgltf_result_out_of_memory:\n\t\treturn \"out of memory\";\n\n\tcase cgltf_result_legacy_gltf:\n\t\treturn \"legacy GLTF\";\n\n\tcase cgltf_result_data_too_short:\n\t\treturn data ? \"buffer too short\" : \"not a GLTF file\";\n\n\tcase cgltf_result_unknown_format:\n\t\treturn data ? \"unknown resource format\" : \"not a GLTF file\";\n\n\tdefault:\n\t\treturn \"unknown error\";\n\t}\n}\n\nstatic void readAccessor(std::vector& data, const cgltf_accessor* accessor)\n{\n\tassert(accessor->type == cgltf_type_scalar);\n\n\tdata.resize(accessor->count);\n\tcgltf_accessor_unpack_floats(accessor, &data[0], data.size());\n}\n\nstatic void readAccessor(std::vector& data, const cgltf_accessor* accessor)\n{\n\tsize_t components = cgltf_num_components(accessor->type);\n\n\tstd::vector temp(accessor->count * components);\n\tcgltf_accessor_unpack_floats(accessor, &temp[0], temp.size());\n\n\tdata.resize(accessor->count);\n\n\tfor (size_t i = 0; i < accessor->count; ++i)\n\t{\n\t\tfor (size_t k = 0; k < components && k < 4; ++k)\n\t\t\tdata[i].f[k] = temp[i * components + k];\n\t}\n}\n\nstatic void readAccessor(std::vector& data, const cgltf_accessor* accessor, const std::vector& sparse)\n{\n\tdata.resize(sparse.size());\n\n\tfor (size_t i = 0; i < sparse.size(); ++i)\n\t\tcgltf_accessor_read_float(accessor, sparse[i], &data[i].f[0], 4);\n}\n\nstatic void fixupIndices(std::vector& indices, cgltf_primitive_type& type)\n{\n\tif (type == cgltf_primitive_type_line_loop)\n\t{\n\t\tstd::vector result;\n\t\tresult.reserve(indices.size() * 2 + 2);\n\n\t\tfor (size_t i = 1; i <= indices.size(); ++i)\n\t\t{\n\t\t\tresult.push_back(indices[i - 1]);\n\t\t\tresult.push_back(indices[i % indices.size()]);\n\t\t}\n\n\t\tindices.swap(result);\n\t\ttype = cgltf_primitive_type_lines;\n\t}\n\telse if (type == cgltf_primitive_type_line_strip)\n\t{\n\t\tstd::vector result;\n\t\tresult.reserve(indices.size() * 2);\n\n\t\tfor (size_t i = 1; i < indices.size(); ++i)\n\t\t{\n\t\t\tresult.push_back(indices[i - 1]);\n\t\t\tresult.push_back(indices[i]);\n\t\t}\n\n\t\tindices.swap(result);\n\t\ttype = cgltf_primitive_type_lines;\n\t}\n\telse if (type == cgltf_primitive_type_triangle_strip)\n\t{\n\t\tstd::vector result;\n\t\tresult.reserve(indices.size() * 3);\n\n\t\tfor (size_t i = 2; i < indices.size(); ++i)\n\t\t{\n\t\t\tint flip = i & 1;\n\n\t\t\tresult.push_back(indices[i - 2 + flip]);\n\t\t\tresult.push_back(indices[i - 1 - flip]);\n\t\t\tresult.push_back(indices[i]);\n\t\t}\n\n\t\tindices.swap(result);\n\t\ttype = cgltf_primitive_type_triangles;\n\t}\n\telse if (type == cgltf_primitive_type_triangle_fan)\n\t{\n\t\tstd::vector result;\n\t\tresult.reserve(indices.size() * 3);\n\n\t\tfor (size_t i = 2; i < indices.size(); ++i)\n\t\t{\n\t\t\tresult.push_back(indices[0]);\n\t\t\tresult.push_back(indices[i - 1]);\n\t\t\tresult.push_back(indices[i]);\n\t\t}\n\n\t\tindices.swap(result);\n\t\ttype = cgltf_primitive_type_triangles;\n\t}\n\telse if (type == cgltf_primitive_type_lines)\n\t{\n\t\t// glTF files don't require that line index count is divisible by 2, but it is obviously critical for scenes to render\n\t\tindices.resize(indices.size() / 2 * 2);\n\t}\n\telse if (type == cgltf_primitive_type_triangles)\n\t{\n\t\t// glTF files don't require that triangle index count is divisible by 3, but it is obviously critical for scenes to render\n\t\tindices.resize(indices.size() / 3 * 3);\n\t}\n}\n\nstatic bool isIdAttribute(const char* name)\n{\n\treturn strcmp(name, \"_ID\") == 0 ||\n\t strcmp(name, \"_BATCHID\") == 0 ||\n\t strncmp(name, \"_FEATURE_ID_\", 12) == 0;\n}\n\nstatic void parseMeshesGltf(cgltf_data* data, std::vector& meshes, std::vector >& mesh_remap)\n{\n\tsize_t total_primitives = 0;\n\n\tfor (size_t mi = 0; mi < data->meshes_count; ++mi)\n\t\ttotal_primitives += data->meshes[mi].primitives_count;\n\n\tmeshes.reserve(total_primitives);\n\tmesh_remap.resize(data->meshes_count);\n\n\tfor (size_t mi = 0; mi < data->meshes_count; ++mi)\n\t{\n\t\tconst cgltf_mesh& mesh = data->meshes[mi];\n\n\t\tsize_t remap_offset = meshes.size();\n\n\t\tfor (size_t pi = 0; pi < mesh.primitives_count; ++pi)\n\t\t{\n\t\t\tconst cgltf_primitive& primitive = mesh.primitives[pi];\n\n\t\t\tif (primitive.type == cgltf_primitive_type_points && primitive.indices)\n\t\t\t{\n\t\t\t\tfprintf(stderr, \"Warning: ignoring primitive %d of mesh %d because indexed points are not supported\\n\", int(pi), int(mi));\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\tmeshes.push_back(Mesh());\n\t\t\tMesh& result = meshes.back();\n\n\t\t\tresult.scene = -1;\n\t\t\tresult.material = primitive.material;\n\t\t\tresult.extras = primitive.extras;\n\t\t\tresult.type = primitive.type;\n\n\t\t\tresult.streams.reserve(primitive.attributes_count);\n\n\t\t\tsize_t vertex_count = primitive.attributes_count ? primitive.attributes[0].data->count : 0;\n\n\t\t\tif (primitive.indices)\n\t\t\t{\n\t\t\t\tresult.indices.resize(primitive.indices->count);\n\t\t\t\tif (!result.indices.empty())\n\t\t\t\t\tcgltf_accessor_unpack_indices(primitive.indices, &result.indices[0], sizeof(unsigned int), result.indices.size());\n\n\t\t\t\tfor (size_t i = 0; i < result.indices.size(); ++i)\n\t\t\t\t\tassert(result.indices[i] < vertex_count);\n\t\t\t}\n\t\t\telse if (primitive.type != cgltf_primitive_type_points)\n\t\t\t{\n\t\t\t\t// note, while we could generate a good index buffer here, mesh will be reindexed during processing\n\t\t\t\tresult.indices.resize(vertex_count);\n\t\t\t\tfor (size_t i = 0; i < vertex_count; ++i)\n\t\t\t\t\tresult.indices[i] = unsigned(i);\n\t\t\t}\n\n\t\t\t// convert line loops and line/triangle strips to lists\n\t\t\tfixupIndices(result.indices, result.type);\n\n\t\t\tstd::vector sparse;\n\n\t\t\t// if the index data is very sparse, switch to deindexing on the fly to avoid the excessive cost of reading large accessors\n\t\t\tif (!result.indices.empty() && result.indices.size() < vertex_count / 2)\n\t\t\t{\n\t\t\t\tsparse = result.indices;\n\n\t\t\t\t// mesh will be reindexed during processing\n\t\t\t\tfor (size_t i = 0; i < result.indices.size(); ++i)\n\t\t\t\t\tresult.indices[i] = unsigned(i);\n\t\t\t}\n\n\t\t\tfor (size_t ai = 0; ai < primitive.attributes_count; ++ai)\n\t\t\t{\n\t\t\t\tconst cgltf_attribute& attr = primitive.attributes[ai];\n\n\t\t\t\tif (attr.type == cgltf_attribute_type_invalid || (attr.type == cgltf_attribute_type_custom && !isIdAttribute(attr.name)))\n\t\t\t\t{\n\t\t\t\t\tfprintf(stderr, \"Warning: ignoring %s attribute %s in primitive %d of mesh %d\\n\", attr.type == cgltf_attribute_type_invalid ? \"unknown\" : \"custom\", attr.name, int(pi), int(mi));\n\t\t\t\t\tcontinue;\n\t\t\t\t}\n\n\t\t\t\tif (result.streams.size() == kMaxStreams)\n\t\t\t\t{\n\t\t\t\t\tfprintf(stderr, \"Warning: ignoring attribute %s in primitive %d of mesh %d (limit %d reached)\\n\", attr.name, int(pi), int(mi), int(kMaxStreams));\n\t\t\t\t\tcontinue;\n\t\t\t\t}\n\n\t\t\t\tresult.streams.push_back(Stream());\n\t\t\t\tStream& s = result.streams.back();\n\n\t\t\t\ts.type = attr.type;\n\t\t\t\ts.index = attr.index;\n\n\t\t\t\tif (attr.type == cgltf_attribute_type_custom)\n\t\t\t\t\ts.custom_name = attr.name;\n\n\t\t\t\tif (sparse.empty())\n\t\t\t\t\treadAccessor(s.data, attr.data);\n\t\t\t\telse\n\t\t\t\t\treadAccessor(s.data, attr.data, sparse);\n\n\t\t\t\tif (attr.type == cgltf_attribute_type_color && attr.data->type == cgltf_type_vec3)\n\t\t\t\t{\n\t\t\t\t\tfor (size_t i = 0; i < s.data.size(); ++i)\n\t\t\t\t\t\ts.data[i].f[3] = 1.0f;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tfor (size_t ti = 0; ti < primitive.targets_count; ++ti)\n\t\t\t{\n\t\t\t\tconst cgltf_morph_target& target = primitive.targets[ti];\n\n\t\t\t\tfor (size_t ai = 0; ai < target.attributes_count; ++ai)\n\t\t\t\t{\n\t\t\t\t\tconst cgltf_attribute& attr = target.attributes[ai];\n\n\t\t\t\t\tif (attr.type == cgltf_attribute_type_invalid || attr.type == cgltf_attribute_type_custom)\n\t\t\t\t\t{\n\t\t\t\t\t\tfprintf(stderr, \"Warning: ignoring %s attribute %s in morph target %d of primitive %d of mesh %d\\n\", attr.type == cgltf_attribute_type_invalid ? \"unknown\" : \"custom\", attr.name, int(ti), int(pi), int(mi));\n\t\t\t\t\t\tcontinue;\n\t\t\t\t\t}\n\n\t\t\t\t\tresult.streams.push_back(Stream());\n\t\t\t\t\tStream& s = result.streams.back();\n\n\t\t\t\t\ts.type = attr.type;\n\t\t\t\t\ts.index = attr.index;\n\t\t\t\t\ts.target = int(ti + 1);\n\n\t\t\t\t\tif (sparse.empty())\n\t\t\t\t\t\treadAccessor(s.data, attr.data);\n\t\t\t\t\telse\n\t\t\t\t\t\treadAccessor(s.data, attr.data, sparse);\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tresult.targets = primitive.targets_count;\n\t\t\tresult.target_weights.assign(mesh.weights, mesh.weights + mesh.weights_count);\n\t\t\tresult.target_names.assign(mesh.target_names, mesh.target_names + mesh.target_names_count);\n\n\t\t\tresult.variants.assign(primitive.mappings, primitive.mappings + primitive.mappings_count);\n\t\t}\n\n\t\tmesh_remap[mi] = std::make_pair(remap_offset, meshes.size());\n\t}\n}\n\nstatic void parseMeshInstancesGltf(std::vector& instances, cgltf_node* node, size_t ni)\n{\n\tcgltf_accessor* translation = NULL;\n\tcgltf_accessor* rotation = NULL;\n\tcgltf_accessor* scale = NULL;\n\tcgltf_accessor* color = NULL;\n\n\tfor (size_t i = 0; i < node->mesh_gpu_instancing.attributes_count; ++i)\n\t{\n\t\tconst cgltf_attribute& attr = node->mesh_gpu_instancing.attributes[i];\n\n\t\tif (strcmp(attr.name, \"TRANSLATION\") == 0 && attr.data->type == cgltf_type_vec3)\n\t\t\ttranslation = attr.data;\n\t\telse if (strcmp(attr.name, \"ROTATION\") == 0 && attr.data->type == cgltf_type_vec4)\n\t\t\trotation = attr.data;\n\t\telse if (strcmp(attr.name, \"SCALE\") == 0 && attr.data->type == cgltf_type_vec3)\n\t\t\tscale = attr.data;\n\t\telse if (strcmp(attr.name, \"_COLOR_0\") == 0 && (attr.data->type == cgltf_type_vec3 || attr.data->type == cgltf_type_vec4))\n\t\t\tcolor = attr.data;\n\t\telse\n\t\t\tfprintf(stderr, \"Warning: ignoring %s instance attribute %s in node %d\\n\", *attr.name == '_' ? \"custom\" : \"unknown\", attr.name, int(ni));\n\t}\n\n\tsize_t count = node->mesh_gpu_instancing.attributes[0].data->count;\n\n\tinstances.reserve(instances.size() + count);\n\n\tcgltf_node instance = {};\n\tinstance.parent = node;\n\tinstance.has_translation = translation != NULL;\n\tinstance.has_rotation = rotation != NULL;\n\tinstance.has_scale = scale != NULL;\n\tinstance.rotation[3] = 1.f;\n\tinstance.scale[0] = 1.f;\n\tinstance.scale[1] = 1.f;\n\tinstance.scale[2] = 1.f;\n\n\tfor (size_t i = 0; i < count; ++i)\n\t{\n\t\tif (translation)\n\t\t\tcgltf_accessor_read_float(translation, i, instance.translation, 4);\n\t\tif (rotation)\n\t\t\tcgltf_accessor_read_float(rotation, i, instance.rotation, 4);\n\t\tif (scale)\n\t\t\tcgltf_accessor_read_float(scale, i, instance.scale, 4);\n\n\t\tInstance obj = {};\n\t\tcgltf_node_transform_world(&instance, obj.transform);\n\n\t\tobj.color[0] = obj.color[1] = obj.color[2] = obj.color[3] = 1.0f;\n\n\t\tif (color)\n\t\t\tcgltf_accessor_read_float(color, i, obj.color, 4);\n\n\t\tinstances.push_back(obj);\n\t}\n}\n\nstatic void parseMeshNodesGltf(cgltf_data* data, std::vector& meshes, const std::vector >& mesh_remap)\n{\n\tfor (size_t i = 0; i < data->nodes_count; ++i)\n\t{\n\t\tcgltf_node& node = data->nodes[i];\n\t\tif (!node.mesh)\n\t\t\tcontinue;\n\n\t\tstd::pair range = mesh_remap[node.mesh - data->meshes];\n\n\t\tfor (size_t mi = range.first; mi < range.second; ++mi)\n\t\t{\n\t\t\tMesh* mesh = &meshes[mi];\n\n\t\t\tif (mesh->skin != node.skin && (!mesh->nodes.empty() || !mesh->instances.empty()))\n\t\t\t{\n\t\t\t\t// this should be extremely rare - if the same mesh is used with different skins, we need to duplicate it\n\t\t\t\t// in this case we don't spend any effort on keeping the number of duplicates to the minimum, because this\n\t\t\t\t// should really never happen.\n\t\t\t\tmeshes.push_back(*mesh);\n\t\t\t\tmesh = &meshes.back();\n\t\t\t}\n\n\t\t\tif (node.has_mesh_gpu_instancing)\n\t\t\t{\n\t\t\t\tmesh->scene = 0; // we need to assign scene index since instances are attached to a scene; for now we assume 0\n\t\t\t\tparseMeshInstancesGltf(mesh->instances, &node, i);\n\t\t\t}\n\t\t\telse\n\t\t\t{\n\t\t\t\tmesh->skin = node.skin;\n\t\t\t\tmesh->nodes.push_back(&node);\n\t\t\t}\n\t\t}\n\t}\n\n\tfor (size_t i = 0; i < meshes.size(); ++i)\n\t{\n\t\tMesh& mesh = meshes[i];\n\n\t\t// because the rest of gltfpack assumes that empty nodes array = world-space mesh, we need to filter unused meshes\n\t\tif (mesh.nodes.empty() && mesh.instances.empty())\n\t\t{\n\t\t\tmesh.streams.clear();\n\t\t\tmesh.indices.clear();\n\t\t}\n\t}\n}\n\nstatic void parseAnimationsGltf(cgltf_data* data, std::vector& animations)\n{\n\tanimations.reserve(data->animations_count);\n\n\tfor (size_t i = 0; i < data->animations_count; ++i)\n\t{\n\t\tconst cgltf_animation& animation = data->animations[i];\n\n\t\tanimations.push_back(Animation());\n\t\tAnimation& result = animations.back();\n\n\t\tresult.name = animation.name;\n\n\t\tresult.tracks.reserve(animation.channels_count);\n\n\t\tfor (size_t j = 0; j < animation.channels_count; ++j)\n\t\t{\n\t\t\tconst cgltf_animation_channel& channel = animation.channels[j];\n\n\t\t\tif (!channel.target_node)\n\t\t\t{\n\t\t\t\tfprintf(stderr, \"Warning: ignoring channel %d of animation %d (%s) because it has no target node\\n\", int(j), int(i), animation.name ? animation.name : \"\");\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\tresult.tracks.push_back(Track());\n\t\t\tTrack& track = result.tracks.back();\n\n\t\t\ttrack.node = channel.target_node;\n\t\t\ttrack.path = channel.target_path;\n\n\t\t\ttrack.components = (channel.target_path == cgltf_animation_path_type_weights) ? track.node->mesh->primitives[0].targets_count : 1;\n\n\t\t\ttrack.interpolation = channel.sampler->interpolation;\n\n\t\t\treadAccessor(track.time, channel.sampler->input);\n\t\t\treadAccessor(track.data, channel.sampler->output);\n\t\t}\n\n\t\tif (result.tracks.empty())\n\t\t{\n\t\t\tfprintf(stderr, \"Warning: ignoring animation %d (%s) because it has no valid tracks\\n\", int(i), animation.name ? animation.name : \"\");\n\t\t\tanimations.pop_back();\n\t\t}\n\t}\n}\n\nstatic bool requiresExtension(cgltf_data* data, const char* name)\n{\n\tfor (size_t i = 0; i < data->extensions_required_count; ++i)\n\t\tif (strcmp(data->extensions_required[i], name) == 0)\n\t\t\treturn true;\n\n\treturn false;\n}\n\nstatic bool needsDummyBuffers(cgltf_data* data)\n{\n\tfor (size_t i = 0; i < data->accessors_count; ++i)\n\t{\n\t\tcgltf_accessor* accessor = &data->accessors[i];\n\n\t\tif (accessor->buffer_view && accessor->buffer_view->data == NULL && accessor->buffer_view->buffer->data == NULL)\n\t\t\treturn true;\n\n\t\tif (accessor->is_sparse)\n\t\t{\n\t\t\tcgltf_accessor_sparse* sparse = &accessor->sparse;\n\n\t\t\tif (sparse->indices_buffer_view->buffer->data == NULL)\n\t\t\t\treturn true;\n\t\t\tif (sparse->values_buffer_view->buffer->data == NULL)\n\t\t\t\treturn true;\n\t\t}\n\t}\n\n\tfor (size_t i = 0; i < data->images_count; ++i)\n\t{\n\t\tcgltf_image* image = &data->images[i];\n\n\t\tif (image->buffer_view && image->buffer_view->buffer->data == NULL)\n\t\t\treturn true;\n\t}\n\n\treturn false;\n}\n\nstatic void freeFile(cgltf_data* data)\n{\n\tdata->json = NULL;\n\tdata->bin = NULL;\n\n\tfree(data->file_data);\n\tdata->file_data = NULL;\n}\n\nstatic bool freeUnusedBuffers(cgltf_data* data)\n{\n\tstd::vector used(data->buffers_count);\n\n\tfor (size_t i = 0; i < data->skins_count; ++i)\n\t{\n\t\tconst cgltf_skin& skin = data->skins[i];\n\n\t\tif (skin.inverse_bind_matrices && skin.inverse_bind_matrices->buffer_view)\n\t\t{\n\t\t\tassert(skin.inverse_bind_matrices->buffer_view->buffer);\n\t\t\tused[skin.inverse_bind_matrices->buffer_view->buffer - data->buffers] = 1;\n\t\t}\n\t}\n\n\tfor (size_t i = 0; i < data->images_count; ++i)\n\t{\n\t\tconst cgltf_image& image = data->images[i];\n\n\t\tif (image.buffer_view)\n\t\t{\n\t\t\tassert(image.buffer_view->buffer);\n\t\t\tused[image.buffer_view->buffer - data->buffers] = 1;\n\t\t}\n\t}\n\n\tbool free_bin = false;\n\n\tfor (size_t i = 0; i < data->buffers_count; ++i)\n\t{\n\t\tcgltf_buffer& buffer = data->buffers[i];\n\n\t\tif (!used[i] && buffer.data)\n\t\t{\n\t\t\tif (buffer.data != data->bin)\n\t\t\t\tfree(buffer.data);\n\t\t\telse\n\t\t\t\tfree_bin = true;\n\n\t\t\tbuffer.data = NULL;\n\t\t}\n\t}\n\n\treturn free_bin;\n}\n\nstatic cgltf_result decompressMeshopt(cgltf_data* data)\n{\n\tfor (size_t i = 0; i < data->buffer_views_count; ++i)\n\t{\n\t\tif (!data->buffer_views[i].has_meshopt_compression)\n\t\t\tcontinue;\n\t\tcgltf_meshopt_compression* mc = &data->buffer_views[i].meshopt_compression;\n\n\t\tconst unsigned char* source = (const unsigned char*)mc->buffer->data;\n\t\tif (!source)\n\t\t\treturn cgltf_result_invalid_gltf;\n\t\tsource += mc->offset;\n\n\t\tvoid* result = malloc(mc->count * mc->stride);\n\t\tif (!result)\n\t\t\treturn cgltf_result_out_of_memory;\n\n\t\tdata->buffer_views[i].data = result;\n\n\t\tint rc = -1;\n\n\t\tswitch (mc->mode)\n\t\t{\n\t\tcase cgltf_meshopt_compression_mode_attributes:\n\t\t\trc = meshopt_decodeVertexBuffer(result, mc->count, mc->stride, source, mc->size);\n\t\t\tbreak;\n\n\t\tcase cgltf_meshopt_compression_mode_triangles:\n\t\t\trc = meshopt_decodeIndexBuffer(result, mc->count, mc->stride, source, mc->size);\n\t\t\tbreak;\n\n\t\tcase cgltf_meshopt_compression_mode_indices:\n\t\t\trc = meshopt_decodeIndexSequence(result, mc->count, mc->stride, source, mc->size);\n\t\t\tbreak;\n\n\t\tdefault:\n\t\t\treturn cgltf_result_invalid_gltf;\n\t\t}\n\n\t\tif (rc != 0)\n\t\t\treturn cgltf_result_io_error;\n\n\t\tswitch (mc->filter)\n\t\t{\n\t\tcase cgltf_meshopt_compression_filter_octahedral:\n\t\t\tmeshopt_decodeFilterOct(result, mc->count, mc->stride);\n\t\t\tbreak;\n\n\t\tcase cgltf_meshopt_compression_filter_quaternion:\n\t\t\tmeshopt_decodeFilterQuat(result, mc->count, mc->stride);\n\t\t\tbreak;\n\n\t\tcase cgltf_meshopt_compression_filter_exponential:\n\t\t\tmeshopt_decodeFilterExp(result, mc->count, mc->stride);\n\t\t\tbreak;\n\n\t\tcase cgltf_meshopt_compression_filter_color:\n\t\t\tmeshopt_decodeFilterColor(result, mc->count, mc->stride);\n\t\t\tbreak;\n\n\t\tdefault:\n\t\t\tbreak;\n\t\t}\n\t}\n\n\treturn cgltf_result_success;\n}\n\nstatic cgltf_data* parseGltf(cgltf_data* data, cgltf_result result, std::vector& meshes, std::vector& animations, const char** error)\n{\n\t*error = NULL;\n\n\tif (result != cgltf_result_success)\n\t\t*error = getError(result, data);\n\telse if (requiresExtension(data, \"KHR_draco_mesh_compression\"))\n\t\t*error = \"file requires Draco mesh compression support\";\n\telse if (needsDummyBuffers(data))\n\t\t*error = \"buffer has no data\";\n\n\tif (*error)\n\t{\n\t\tcgltf_free(data);\n\t\treturn NULL;\n\t}\n\n\tif (requiresExtension(data, \"KHR_mesh_quantization\"))\n\t\tfprintf(stderr, \"Warning: file uses quantized geometry; repacking may result in increased quantization error\\n\");\n\tif (requiresExtension(data, \"EXT_mesh_gpu_instancing\") && data->scenes_count > 1)\n\t\tfprintf(stderr, \"Warning: file uses instancing and has more than one scene; results may be incorrect\\n\");\n\n\tstd::vector > mesh_remap;\n\n\tparseMeshesGltf(data, meshes, mesh_remap);\n\tparseMeshNodesGltf(data, meshes, mesh_remap);\n\tparseAnimationsGltf(data, animations);\n\n\tbool free_bin = freeUnusedBuffers(data);\n\n\tif (data->bin && free_bin)\n\t\tfreeFile(data);\n\n\treturn data;\n}\n\ncgltf_data* parseGltf(const char* path, std::vector& meshes, std::vector& animations, const char** error)\n{\n\tcgltf_data* data = NULL;\n\n\tcgltf_options options = {};\n\tcgltf_result result = cgltf_parse_file(&options, path, &data);\n\n\tif (result == cgltf_result_success && !data->bin)\n\t\tfreeFile(data);\n\n\tresult = (result == cgltf_result_success) ? cgltf_load_buffers(&options, data, path) : result;\n\tresult = (result == cgltf_result_success) ? cgltf_validate(data) : result;\n\tresult = (result == cgltf_result_success) ? decompressMeshopt(data) : result;\n\n\treturn parseGltf(data, result, meshes, animations, error);\n}\n\ncgltf_data* parseGlb(const void* buffer, size_t size, std::vector& meshes, std::vector& animations, const char** error)\n{\n\tcgltf_data* data = NULL;\n\n\tcgltf_options options = {};\n\toptions.type = cgltf_file_type_glb;\n\n\tcgltf_result result = cgltf_parse(&options, buffer, size, &data);\n\n\tresult = (result == cgltf_result_success) ? cgltf_load_buffers(&options, data, NULL) : result;\n\tresult = (result == cgltf_result_success) ? cgltf_validate(data) : result;\n\tresult = (result == cgltf_result_success) ? decompressMeshopt(data) : result;\n\n\treturn parseGltf(data, result, meshes, animations, error);\n}\n\nbool areExtrasEqual(const cgltf_extras& lhs, const cgltf_extras& rhs)\n{\n\tif (lhs.data && rhs.data)\n\t\treturn strcmp(lhs.data, rhs.data) == 0;\n\telse\n\t\treturn lhs.data == rhs.data;\n}\n" }, { "path": "gltf/parselib.cpp", "content": "#ifndef _CRT_SECURE_NO_WARNINGS\n#define _CRT_SECURE_NO_WARNINGS\n#endif\n\n#define CGLTF_IMPLEMENTATION\n#include \"../extern/cgltf.h\"\n\n#define FAST_OBJ_IMPLEMENTATION\n#include \"../extern/fast_obj.h\"\n\n#undef CGLTF_IMPLEMENTATION\n#undef FAST_OBJ_IMPLEMENTATION\n" }, { "path": "gltf/parseobj.cpp", "content": "// This file is part of gltfpack; see gltfpack.h for version/license details\n#include \"gltfpack.h\"\n\n#include \"../extern/fast_obj.h\"\n#include \"../src/meshoptimizer.h\"\n\n#include \n#include \n\nstatic void defaultFree(void*, void* p)\n{\n\tfree(p);\n}\n\nstatic int textureIndex(const std::vector& textures, unsigned int name)\n{\n\tfor (size_t i = 0; i < textures.size(); ++i)\n\t\tif (textures[i] == name)\n\t\t\treturn int(i);\n\n\treturn -1;\n}\n\nstatic void fixupUri(char* uri)\n{\n\t// Some .obj paths come with back slashes, that are invalid as URI separators and won't open on macOS/Linux when embedding textures\n\tfor (char* s = uri; *s; ++s)\n\t\tif (*s == '\\\\')\n\t\t\t*s = '/';\n}\n\nstatic void parseMaterialsObj(fastObjMesh* obj, cgltf_data* data)\n{\n\t// every texture in obj has a unique id (1+); we convert it to a 0-based index\n\t// this effectively extracts only used textures out of the obj, as we don't remove unused textures later in the processing\n\tstd::vector textures;\n\n\tfor (unsigned int mi = 0; mi < obj->material_count; ++mi)\n\t{\n\t\tfastObjMaterial& om = obj->materials[mi];\n\n\t\tif (om.map_Kd && textureIndex(textures, om.map_Kd) < 0)\n\t\t\ttextures.push_back(om.map_Kd);\n\t}\n\n\tdata->images = (cgltf_image*)calloc(textures.size(), sizeof(cgltf_image));\n\tdata->images_count = textures.size();\n\n\tfor (size_t i = 0; i < textures.size(); ++i)\n\t{\n\t\tunsigned int id = textures[i];\n\t\tdata->images[i].uri = strdup(obj->textures[id].name);\n\t\tfixupUri(data->images[i].uri);\n\t}\n\n\tdata->textures = (cgltf_texture*)calloc(textures.size(), sizeof(cgltf_texture));\n\tdata->textures_count = textures.size();\n\n\tfor (size_t i = 0; i < textures.size(); ++i)\n\t{\n\t\tdata->textures[i].image = &data->images[i];\n\t}\n\n\tdata->materials = (cgltf_material*)calloc(obj->material_count, sizeof(cgltf_material));\n\tdata->materials_count = obj->material_count;\n\n\tfor (unsigned int mi = 0; mi < obj->material_count; ++mi)\n\t{\n\t\tconst fastObjMaterial& om = obj->materials[mi];\n\t\tcgltf_material& gm = data->materials[mi];\n\n\t\tif (om.name)\n\t\t\tgm.name = strdup(om.name);\n\n\t\tgm.has_pbr_metallic_roughness = true;\n\n\t\tgm.pbr_metallic_roughness.base_color_factor[0] = 1.0f;\n\t\tgm.pbr_metallic_roughness.base_color_factor[1] = 1.0f;\n\t\tgm.pbr_metallic_roughness.base_color_factor[2] = 1.0f;\n\t\tgm.pbr_metallic_roughness.base_color_factor[3] = 1.0f;\n\n\t\tgm.pbr_metallic_roughness.metallic_factor = 0.0f;\n\t\tgm.pbr_metallic_roughness.roughness_factor = 1.0f;\n\n\t\tgm.alpha_cutoff = 0.5f;\n\n\t\tif (om.map_Kd)\n\t\t{\n\t\t\tgm.pbr_metallic_roughness.base_color_texture.texture = &data->textures[textureIndex(textures, om.map_Kd)];\n\t\t\tgm.pbr_metallic_roughness.base_color_texture.scale = 1.0f;\n\n\t\t\tgm.alpha_mode = (om.illum == 4 || om.illum == 6 || om.illum == 7 || om.illum == 9) ? cgltf_alpha_mode_mask : cgltf_alpha_mode_opaque;\n\t\t}\n\t\telse\n\t\t{\n\t\t\tgm.pbr_metallic_roughness.base_color_factor[0] = om.Kd[0];\n\t\t\tgm.pbr_metallic_roughness.base_color_factor[1] = om.Kd[1];\n\t\t\tgm.pbr_metallic_roughness.base_color_factor[2] = om.Kd[2];\n\t\t}\n\n\t\tif (om.map_d)\n\t\t{\n\t\t\tif (om.map_Kd && strcmp(obj->textures[om.map_Kd].name, obj->textures[om.map_d].name) != 0)\n\t\t\t\tfprintf(stderr, \"Warning: material has different diffuse and alpha textures (Kd: %s, d: %s) and might not render correctly\\n\", obj->textures[om.map_Kd].name, obj->textures[om.map_d].name);\n\n\t\t\tgm.alpha_mode = cgltf_alpha_mode_blend;\n\t\t}\n\t\telse if (om.d < 1.0f)\n\t\t{\n\t\t\tgm.pbr_metallic_roughness.base_color_factor[3] = om.d;\n\n\t\t\tgm.alpha_mode = cgltf_alpha_mode_blend;\n\t\t}\n\t}\n}\n\nstatic void parseNodesObj(fastObjMesh* obj, cgltf_data* data)\n{\n\tdata->nodes = (cgltf_node*)calloc(obj->object_count, sizeof(cgltf_node));\n\tdata->nodes_count = obj->object_count;\n\n\tfor (unsigned int oi = 0; oi < obj->object_count; ++oi)\n\t{\n\t\tconst fastObjGroup& og = obj->objects[oi];\n\t\tcgltf_node* node = &data->nodes[oi];\n\n\t\tif (og.name)\n\t\t\tnode->name = strdup(og.name);\n\n\t\tnode->rotation[3] = 1.0f;\n\t\tnode->scale[0] = 1.0f;\n\t\tnode->scale[1] = 1.0f;\n\t\tnode->scale[2] = 1.0f;\n\t}\n\n\tdata->scenes = (cgltf_scene*)calloc(1, sizeof(cgltf_scene));\n\tdata->scenes_count = 1;\n\n\tdata->scene = data->scenes;\n\n\tdata->scenes->nodes = (cgltf_node**)calloc(obj->object_count, sizeof(cgltf_node*));\n\tdata->scenes->nodes_count = obj->object_count;\n\n\tfor (unsigned int oi = 0; oi < obj->object_count; ++oi)\n\t\tdata->scenes->nodes[oi] = &data->nodes[oi];\n}\n\nstatic void parseMeshObj(fastObjMesh* obj, unsigned int face_offset, unsigned int face_vertex_offset, unsigned int face_count, unsigned int face_vertex_count, unsigned int index_count, Mesh& mesh)\n{\n\tstd::vector remap(face_vertex_count);\n\tsize_t unique_vertices = meshopt_generateVertexRemap(remap.data(), NULL, face_vertex_count, &obj->indices[face_vertex_offset], face_vertex_count, sizeof(fastObjIndex));\n\n\tint pos_stream = 0;\n\tint nrm_stream = obj->normal_count > 1 ? 1 : -1;\n\tint tex_stream = obj->texcoord_count > 1 ? 1 + (nrm_stream >= 0) : -1;\n\tint col_stream = obj->color_count > 1 ? 1 + (nrm_stream >= 0) + (tex_stream >= 0) : -1;\n\n\tmesh.streams.resize(1 + (nrm_stream >= 0) + (tex_stream >= 0) + (col_stream >= 0));\n\n\tmesh.streams[pos_stream].type = cgltf_attribute_type_position;\n\tmesh.streams[pos_stream].data.resize(unique_vertices);\n\n\tif (nrm_stream >= 0)\n\t{\n\t\tmesh.streams[nrm_stream].type = cgltf_attribute_type_normal;\n\t\tmesh.streams[nrm_stream].data.resize(unique_vertices);\n\t}\n\n\tif (tex_stream >= 0)\n\t{\n\t\tmesh.streams[tex_stream].type = cgltf_attribute_type_texcoord;\n\t\tmesh.streams[tex_stream].data.resize(unique_vertices);\n\t}\n\n\tif (col_stream >= 0)\n\t{\n\t\tmesh.streams[col_stream].type = cgltf_attribute_type_color;\n\t\tmesh.streams[col_stream].data.resize(unique_vertices);\n\t}\n\n\tmesh.indices.resize(index_count);\n\n\tfor (unsigned int vi = 0; vi < face_vertex_count; ++vi)\n\t{\n\t\tunsigned int target = remap[vi];\n\t\t// TODO: this fills every target vertex multiple times\n\n\t\tfastObjIndex ii = obj->indices[face_vertex_offset + vi];\n\n\t\tAttr p = {{obj->positions[ii.p * 3 + 0], obj->positions[ii.p * 3 + 1], obj->positions[ii.p * 3 + 2]}};\n\t\tmesh.streams[pos_stream].data[target] = p;\n\n\t\tif (nrm_stream >= 0)\n\t\t{\n\t\t\tAttr n = {{obj->normals[ii.n * 3 + 0], obj->normals[ii.n * 3 + 1], obj->normals[ii.n * 3 + 2]}};\n\t\t\tmesh.streams[nrm_stream].data[target] = n;\n\t\t}\n\n\t\tif (tex_stream >= 0)\n\t\t{\n\t\t\tAttr t = {{obj->texcoords[ii.t * 2 + 0], 1.f - obj->texcoords[ii.t * 2 + 1]}};\n\t\t\tmesh.streams[tex_stream].data[target] = t;\n\t\t}\n\n\t\tif (col_stream >= 0)\n\t\t{\n\t\t\tAttr c = {{obj->colors[ii.p * 3 + 0], obj->colors[ii.p * 3 + 1], obj->colors[ii.p * 3 + 2]}};\n\t\t\tmesh.streams[col_stream].data[target] = c;\n\t\t}\n\t}\n\n\tunsigned int vertex_offset = 0;\n\tunsigned int index_offset = 0;\n\n\tfor (unsigned int fi = 0; fi < face_count; ++fi)\n\t{\n\t\tunsigned int face_vertices = obj->face_vertices[face_offset + fi];\n\n\t\tif (mesh.type == cgltf_primitive_type_lines)\n\t\t{\n\t\t\tfor (unsigned int vi = 1; vi < face_vertices; ++vi)\n\t\t\t{\n\t\t\t\tsize_t to = index_offset + (vi - 1) * 2;\n\n\t\t\t\tmesh.indices[to + 0] = remap[vertex_offset + vi - 1];\n\t\t\t\tmesh.indices[to + 1] = remap[vertex_offset + vi];\n\t\t\t}\n\n\t\t\tvertex_offset += face_vertices;\n\t\t\tindex_offset += (face_vertices - 1) * 2;\n\t\t}\n\t\telse\n\t\t{\n\t\t\tfor (unsigned int vi = 2; vi < face_vertices; ++vi)\n\t\t\t{\n\t\t\t\tsize_t to = index_offset + (vi - 2) * 3;\n\n\t\t\t\tmesh.indices[to + 0] = remap[vertex_offset];\n\t\t\t\tmesh.indices[to + 1] = remap[vertex_offset + vi - 1];\n\t\t\t\tmesh.indices[to + 2] = remap[vertex_offset + vi];\n\t\t\t}\n\n\t\t\tvertex_offset += face_vertices;\n\t\t\tindex_offset += (face_vertices - 2) * 3;\n\t\t}\n\t}\n\n\tassert(vertex_offset == face_vertex_count);\n\tassert(index_offset == index_count);\n}\n\nstatic void parseMeshGroupObj(fastObjMesh* obj, const fastObjGroup& og, cgltf_data* data, cgltf_node* node, std::vector& meshes)\n{\n\tunsigned int face_vertex_offset = og.index_offset;\n\tunsigned int face_end_offset = og.face_offset + og.face_count;\n\n\tfor (unsigned int face_offset = og.face_offset; face_offset < face_end_offset;)\n\t{\n\t\tunsigned int mi = obj->face_materials[face_offset];\n\t\tunsigned char isl = obj->face_lines ? obj->face_lines[face_offset] : 0;\n\n\t\tunsigned int face_count = 0;\n\t\tunsigned int face_vertex_count = 0;\n\t\tunsigned int index_count = 0;\n\n\t\tfor (unsigned int fj = face_offset; fj < face_end_offset && obj->face_materials[fj] == mi && (!obj->face_lines || obj->face_lines[fj] == isl); ++fj)\n\t\t{\n\t\t\tface_count += 1;\n\t\t\tface_vertex_count += obj->face_vertices[fj];\n\t\t\tindex_count += isl ? (obj->face_vertices[fj] - 1) * 2 : (obj->face_vertices[fj] - 2) * 3;\n\t\t}\n\n\t\tmeshes.push_back(Mesh());\n\t\tMesh& mesh = meshes.back();\n\n\t\tif (data->materials_count)\n\t\t{\n\t\t\tassert(mi < data->materials_count);\n\t\t\tmesh.material = &data->materials[mi];\n\t\t}\n\n\t\tmesh.type = isl ? cgltf_primitive_type_lines : cgltf_primitive_type_triangles;\n\t\tmesh.targets = 0;\n\n\t\tif (node)\n\t\t\tmesh.nodes.push_back(node);\n\n\t\tparseMeshObj(obj, face_offset, face_vertex_offset, face_count, face_vertex_count, index_count, mesh);\n\n\t\tface_offset += face_count;\n\t\tface_vertex_offset += face_vertex_count;\n\t}\n}\n\ncgltf_data* parseObj(const char* path, std::vector& meshes, const char** error)\n{\n\tfastObjMesh* obj = fast_obj_read(path);\n\n\tif (!obj)\n\t{\n\t\t*error = \"file not found\";\n\t\treturn NULL;\n\t}\n\n\tint fallback_materials = 0;\n\tfor (unsigned int mi = 0; mi < obj->material_count; ++mi)\n\t\tfallback_materials += obj->materials[mi].fallback;\n\n\tif (fallback_materials)\n\t\tfprintf(stderr, \"Warning: %d/%d materials could not be loaded from mtllib\\n\", fallback_materials, obj->material_count);\n\n\tcgltf_data* data = (cgltf_data*)calloc(1, sizeof(cgltf_data));\n\tdata->memory.free_func = defaultFree;\n\n\tparseMaterialsObj(obj, data);\n\n\tparseNodesObj(obj, data);\n\tassert(data->nodes_count == obj->object_count);\n\n\tfor (unsigned int oi = 0; oi < obj->object_count; ++oi)\n\t\tparseMeshGroupObj(obj, obj->objects[oi], data, &data->nodes[oi], meshes);\n\n\tfast_obj_destroy(obj);\n\n\treturn data;\n}\n" }, { "path": "gltf/stream.cpp", "content": "// This file is part of gltfpack; see gltfpack.h for version/license details\n#include \"gltfpack.h\"\n\n#include \n\n#include \n#include \n#include \n#include \n\n#include \"../src/meshoptimizer.h\"\n\nstruct Bounds\n{\n\tAttr min, max;\n\n\tBounds()\n\t{\n\t\tmin.f[0] = min.f[1] = min.f[2] = min.f[3] = +FLT_MAX;\n\t\tmax.f[0] = max.f[1] = max.f[2] = max.f[3] = -FLT_MAX;\n\t}\n\n\tbool isValid() const\n\t{\n\t\treturn min.f[0] <= max.f[0] && min.f[1] <= max.f[1] && min.f[2] <= max.f[2] && min.f[3] <= max.f[3];\n\t}\n\n\tfloat getExtent() const\n\t{\n\t\treturn std::max(max.f[0] - min.f[0], std::max(max.f[1] - min.f[1], max.f[2] - min.f[2]));\n\t}\n\n\tvoid merge(const Bounds& other)\n\t{\n\t\tfor (int k = 0; k < 4; ++k)\n\t\t{\n\t\t\tmin.f[k] = std::min(min.f[k], other.min.f[k]);\n\t\t\tmax.f[k] = std::max(max.f[k], other.max.f[k]);\n\t\t}\n\t}\n};\n\nstatic Bounds computeBounds(const Mesh& mesh, cgltf_attribute_type type)\n{\n\tBounds b;\n\tAttr pad = {};\n\n\tfor (size_t j = 0; j < mesh.streams.size(); ++j)\n\t{\n\t\tconst Stream& s = mesh.streams[j];\n\n\t\tif (s.type == type)\n\t\t{\n\t\t\tif (s.target == 0)\n\t\t\t{\n\t\t\t\tfor (size_t k = 0; k < s.data.size(); ++k)\n\t\t\t\t{\n\t\t\t\t\tconst Attr& a = s.data[k];\n\n\t\t\t\t\tb.min.f[0] = std::min(b.min.f[0], a.f[0]);\n\t\t\t\t\tb.min.f[1] = std::min(b.min.f[1], a.f[1]);\n\t\t\t\t\tb.min.f[2] = std::min(b.min.f[2], a.f[2]);\n\t\t\t\t\tb.min.f[3] = std::min(b.min.f[3], a.f[3]);\n\n\t\t\t\t\tb.max.f[0] = std::max(b.max.f[0], a.f[0]);\n\t\t\t\t\tb.max.f[1] = std::max(b.max.f[1], a.f[1]);\n\t\t\t\t\tb.max.f[2] = std::max(b.max.f[2], a.f[2]);\n\t\t\t\t\tb.max.f[3] = std::max(b.max.f[3], a.f[3]);\n\t\t\t\t}\n\t\t\t}\n\t\t\telse\n\t\t\t{\n\t\t\t\tfor (size_t k = 0; k < s.data.size(); ++k)\n\t\t\t\t{\n\t\t\t\t\tconst Attr& a = s.data[k];\n\n\t\t\t\t\tpad.f[0] = std::max(pad.f[0], fabsf(a.f[0]));\n\t\t\t\t\tpad.f[1] = std::max(pad.f[1], fabsf(a.f[1]));\n\t\t\t\t\tpad.f[2] = std::max(pad.f[2], fabsf(a.f[2]));\n\t\t\t\t\tpad.f[3] = std::max(pad.f[3], fabsf(a.f[3]));\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\tfor (int k = 0; k < 4; ++k)\n\t{\n\t\tb.min.f[k] -= pad.f[k];\n\t\tb.max.f[k] += pad.f[k];\n\t}\n\n\treturn b;\n}\n\nstatic float computeUvArea(const Mesh& mesh)\n{\n\tif (mesh.indices.empty() || mesh.type != cgltf_primitive_type_triangles)\n\t\treturn 0.f;\n\n\tfloat result = 0.f;\n\n\tfor (size_t j = 0; j < mesh.streams.size(); ++j)\n\t{\n\t\tconst Stream& s = mesh.streams[j];\n\n\t\tif (s.type != cgltf_attribute_type_texcoord)\n\t\t\tcontinue;\n\n\t\tfloat uvarea = 0.f;\n\n\t\tfor (size_t i = 0; i < mesh.indices.size(); i += 3)\n\t\t{\n\t\t\tunsigned int a = mesh.indices[i + 0];\n\t\t\tunsigned int b = mesh.indices[i + 1];\n\t\t\tunsigned int c = mesh.indices[i + 2];\n\n\t\t\tconst Attr& va = s.data[a];\n\t\t\tconst Attr& vb = s.data[b];\n\t\t\tconst Attr& vc = s.data[c];\n\n\t\t\tuvarea += fabsf((vb.f[0] - va.f[0]) * (vc.f[1] - va.f[1]) - (vc.f[0] - va.f[0]) * (vb.f[1] - va.f[1]));\n\t\t}\n\n\t\tresult = std::max(result, uvarea / float(mesh.indices.size() / 3));\n\t}\n\n\treturn result;\n}\n\nQuantizationPosition prepareQuantizationPosition(const std::vector& meshes, const Settings& settings)\n{\n\tQuantizationPosition result = {};\n\n\tresult.bits = settings.pos_bits;\n\tresult.normalized = settings.pos_normalized;\n\n\tstd::vector bounds(meshes.size());\n\n\tfor (size_t i = 0; i < meshes.size(); ++i)\n\t\tbounds[i] = computeBounds(meshes[i], cgltf_attribute_type_position);\n\n\tBounds b;\n\tfor (size_t i = 0; i < meshes.size(); ++i)\n\t\tb.merge(bounds[i]);\n\n\tif (b.isValid())\n\t{\n\t\tresult.offset[0] = b.min.f[0];\n\t\tresult.offset[1] = b.min.f[1];\n\t\tresult.offset[2] = b.min.f[2];\n\t\tresult.scale = b.getExtent();\n\t}\n\n\tif (b.isValid() && settings.quantize && !settings.pos_float)\n\t{\n\t\tfloat error = result.scale * 0.5f / (1 << (result.bits - 1));\n\t\tfloat max_rel_error = 0;\n\n\t\tfor (size_t i = 0; i < meshes.size(); ++i)\n\t\t\tif (bounds[i].isValid() && bounds[i].getExtent() > 1e-2f)\n\t\t\t\tmax_rel_error = std::max(max_rel_error, error / bounds[i].getExtent());\n\n\t\tif (max_rel_error > 5e-2f)\n\t\t\tfprintf(stderr, \"Warning: position data has significant error (%.0f%%); consider using floating-point quantization (-vpf) or more bits (-vp N)\\n\", max_rel_error * 100);\n\t}\n\n\tresult.node_scale = result.scale / float((1 << result.bits) - 1) * (result.normalized ? 65535.f : 1.f);\n\n\treturn result;\n}\n\nstatic size_t follow(std::vector& parents, size_t index)\n{\n\twhile (index != parents[index])\n\t{\n\t\tsize_t parent = parents[index];\n\n\t\tparents[index] = parents[parent];\n\t\tindex = parent;\n\t}\n\n\treturn index;\n}\n\nvoid prepareQuantizationTexture(cgltf_data* data, std::vector& result, std::vector& indices, const std::vector& meshes, const Settings& settings)\n{\n\t// use union-find to associate each material with a canonical material\n\t// this is necessary because any set of materials that are used on the same mesh must use the same quantization\n\tstd::vector parents(result.size());\n\n\tfor (size_t i = 0; i < parents.size(); ++i)\n\t\tparents[i] = i;\n\n\tfor (size_t i = 0; i < meshes.size(); ++i)\n\t{\n\t\tconst Mesh& mesh = meshes[i];\n\n\t\tif (!mesh.material && mesh.variants.empty())\n\t\t\tcontinue;\n\n\t\tsize_t root = follow(parents, (mesh.material ? mesh.material : mesh.variants[0].material) - data->materials);\n\n\t\tfor (size_t j = 0; j < mesh.variants.size(); ++j)\n\t\t{\n\t\t\tsize_t var = follow(parents, mesh.variants[j].material - data->materials);\n\n\t\t\tparents[var] = root;\n\t\t}\n\n\t\tindices[i] = root;\n\t}\n\n\t// compute canonical material bounds based on meshes that use them\n\tstd::vector bounds(result.size());\n\n\tfor (size_t i = 0; i < meshes.size(); ++i)\n\t{\n\t\tconst Mesh& mesh = meshes[i];\n\n\t\tif (!mesh.material && mesh.variants.empty())\n\t\t\tcontinue;\n\n\t\tindices[i] = follow(parents, indices[i]);\n\n\t\tBounds mb = computeBounds(mesh, cgltf_attribute_type_texcoord);\n\t\tbounds[indices[i]].merge(mb);\n\t}\n\n\t// detect potential precision issues and warn about them\n\tif (settings.quantize && !settings.tex_float)\n\t{\n\t\tfloat max_rel_error = 0;\n\n\t\tfor (size_t i = 0; i < meshes.size(); ++i)\n\t\t{\n\t\t\tconst Mesh& mesh = meshes[i];\n\n\t\t\tif (!mesh.material && mesh.variants.empty())\n\t\t\t\tcontinue;\n\n\t\t\tconst Bounds& b = bounds[indices[i]];\n\t\t\tif (!b.isValid())\n\t\t\t\tcontinue;\n\n\t\t\tfloat scale = std::max(b.max.f[0] - b.min.f[0], b.max.f[1] - b.min.f[1]);\n\t\t\tfloat error = scale * 0.5f / (1 << (settings.tex_bits - 1));\n\n\t\t\tif (error < 1e-3f)\n\t\t\t\tcontinue;\n\n\t\t\tfloat uvarea = computeUvArea(mesh);\n\t\t\tfloat rel_error = uvarea > 0 ? error / sqrtf(uvarea) : 0.f;\n\n\t\t\tmax_rel_error = std::max(max_rel_error, rel_error);\n\t\t}\n\n\t\tif (max_rel_error > 1e-1f)\n\t\t\tfprintf(stderr, \"Warning: texture coordinate data has significant error (%.0f%%); consider using floating-point quantization (-vtf) or more bits (-vt N)\\n\", max_rel_error * 100);\n\t}\n\n\t// update all material data using canonical bounds\n\tfor (size_t i = 0; i < result.size(); ++i)\n\t{\n\t\tQuantizationTexture& qt = result[i];\n\n\t\tqt.bits = settings.tex_bits;\n\t\tqt.normalized = true;\n\n\t\tconst Bounds& b = bounds[follow(parents, i)];\n\n\t\tif (b.isValid())\n\t\t{\n\t\t\tqt.offset[0] = b.min.f[0];\n\t\t\tqt.offset[1] = b.min.f[1];\n\t\t\tqt.scale[0] = b.max.f[0] - b.min.f[0];\n\t\t\tqt.scale[1] = b.max.f[1] - b.min.f[1];\n\t\t}\n\t}\n}\n\nvoid getPositionBounds(float min[3], float max[3], const Stream& stream, const QuantizationPosition& qp, const Settings& settings)\n{\n\tassert(stream.type == cgltf_attribute_type_position);\n\tassert(stream.data.size() > 0);\n\n\tmin[0] = min[1] = min[2] = FLT_MAX;\n\tmax[0] = max[1] = max[2] = -FLT_MAX;\n\n\tfor (size_t i = 0; i < stream.data.size(); ++i)\n\t{\n\t\tconst Attr& a = stream.data[i];\n\n\t\tfor (int k = 0; k < 3; ++k)\n\t\t{\n\t\t\tmin[k] = std::min(min[k], a.f[k]);\n\t\t\tmax[k] = std::max(max[k], a.f[k]);\n\t\t}\n\t}\n\n\tif (settings.quantize)\n\t{\n\t\tif (settings.pos_float)\n\t\t{\n\t\t\tfor (int k = 0; k < 3; ++k)\n\t\t\t{\n\t\t\t\tmin[k] = meshopt_quantizeFloat(min[k], qp.bits);\n\t\t\t\tmax[k] = meshopt_quantizeFloat(max[k], qp.bits);\n\t\t\t}\n\t\t}\n\t\telse\n\t\t{\n\t\t\tfloat pos_rscale = qp.scale == 0.f ? 0.f : 1.f / qp.scale * (stream.target > 0 && qp.normalized ? 32767.f / 65535.f : 1.f);\n\n\t\t\tfor (int k = 0; k < 3; ++k)\n\t\t\t{\n\t\t\t\tif (stream.target == 0)\n\t\t\t\t{\n\t\t\t\t\tmin[k] = float(meshopt_quantizeUnorm((min[k] - qp.offset[k]) * pos_rscale, qp.bits));\n\t\t\t\t\tmax[k] = float(meshopt_quantizeUnorm((max[k] - qp.offset[k]) * pos_rscale, qp.bits));\n\t\t\t\t}\n\t\t\t\telse\n\t\t\t\t{\n\t\t\t\t\tmin[k] = (min[k] >= 0.f ? 1.f : -1.f) * float(meshopt_quantizeUnorm(fabsf(min[k]) * pos_rscale, qp.bits));\n\t\t\t\t\tmax[k] = (max[k] >= 0.f ? 1.f : -1.f) * float(meshopt_quantizeUnorm(fabsf(max[k]) * pos_rscale, qp.bits));\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n}\n\nstatic void renormalizeWeights(uint8_t (&w)[4])\n{\n\tint sum = w[0] + w[1] + w[2] + w[3];\n\n\tif (sum == 255)\n\t\treturn;\n\n\t// we assume that the total error is limited to 0.5/component = 2\n\t// this means that it's acceptable to adjust the max. component to compensate for the error\n\tint max = 0;\n\n\tfor (int k = 1; k < 4; ++k)\n\t\tif (w[k] > w[max])\n\t\t\tmax = k;\n\n\tw[max] += uint8_t(255 - sum);\n}\n\nstatic void encodeSnorm(void* destination, size_t count, size_t stride, int bits, const float* data)\n{\n\tassert(stride == 4 || stride == 8);\n\tassert(bits >= 1 && bits <= 16);\n\n\tsigned char* d8 = static_cast(destination);\n\tshort* d16 = static_cast(destination);\n\n\tfor (size_t i = 0; i < count; ++i)\n\t{\n\t\tconst float* v = &data[i * 4];\n\n\t\tint fx = meshopt_quantizeSnorm(v[0], bits);\n\t\tint fy = meshopt_quantizeSnorm(v[1], bits);\n\t\tint fz = meshopt_quantizeSnorm(v[2], bits);\n\t\tint fw = meshopt_quantizeSnorm(v[3], bits);\n\n\t\tif (stride == 4)\n\t\t{\n\t\t\td8[i * 4 + 0] = (signed char)(fx);\n\t\t\td8[i * 4 + 1] = (signed char)(fy);\n\t\t\td8[i * 4 + 2] = (signed char)(fz);\n\t\t\td8[i * 4 + 3] = (signed char)(fw);\n\t\t}\n\t\telse\n\t\t{\n\t\t\td16[i * 4 + 0] = short(fx);\n\t\t\td16[i * 4 + 1] = short(fy);\n\t\t\td16[i * 4 + 2] = short(fz);\n\t\t\td16[i * 4 + 3] = short(fw);\n\t\t}\n\t}\n}\n\nstatic int quantizeColor(float v, int bytebits, int bits)\n{\n\tint result = meshopt_quantizeUnorm(v, bytebits);\n\n\t// replicate the top bit into the low significant bits\n\tconst int mask = (1 << (bytebits - bits)) - 1;\n\n\treturn (result & ~mask) | (mask & -(result >> (bytebits - 1)));\n}\n\nstatic void encodeColor(void* destination, size_t count, size_t stride, int bits, const float* data)\n{\n\tassert(stride == 4 || stride == 8);\n\tassert(bits >= 2 && bits <= 16);\n\n\tunsigned char* d8 = static_cast(destination);\n\tunsigned short* d16 = static_cast(destination);\n\n\tfor (size_t i = 0; i < count; ++i)\n\t{\n\t\tconst float* c = &data[i * 4];\n\n\t\tif (stride == 4)\n\t\t{\n\t\t\td8[i * 4 + 0] = uint8_t(quantizeColor(c[0], 8, bits));\n\t\t\td8[i * 4 + 1] = uint8_t(quantizeColor(c[1], 8, bits));\n\t\t\td8[i * 4 + 2] = uint8_t(quantizeColor(c[2], 8, bits));\n\t\t\td8[i * 4 + 3] = uint8_t(quantizeColor(c[3], 8, bits));\n\t\t}\n\t\telse\n\t\t{\n\t\t\td16[i * 4 + 0] = uint16_t(quantizeColor(c[0], 16, bits));\n\t\t\td16[i * 4 + 1] = uint16_t(quantizeColor(c[1], 16, bits));\n\t\t\td16[i * 4 + 2] = uint16_t(quantizeColor(c[2], 16, bits));\n\t\t\td16[i * 4 + 3] = uint16_t(quantizeColor(c[3], 16, bits));\n\t\t}\n\t}\n}\n\nstatic StreamFormat writeVertexStreamRaw(std::string& bin, const Stream& stream, cgltf_type type, size_t components)\n{\n\tassert(components >= 1 && components <= 4);\n\n\tfor (size_t i = 0; i < stream.data.size(); ++i)\n\t{\n\t\tconst Attr& a = stream.data[i];\n\n\t\tbin.append(reinterpret_cast(a.f), sizeof(float) * components);\n\t}\n\n\tStreamFormat format = {type, cgltf_component_type_r_32f, false, sizeof(float) * components};\n\treturn format;\n}\n\nstatic StreamFormat writeVertexStreamFloat(std::string& bin, const Stream& stream, cgltf_type type, int components, bool expf, int bits, meshopt_EncodeExpMode mode)\n{\n\tassert(components >= 1 && components <= 4);\n\n\tStreamFormat::Filter filter = expf ? StreamFormat::Filter_Exp : StreamFormat::Filter_None;\n\n\tif (filter == StreamFormat::Filter_Exp)\n\t{\n\t\tsize_t offset = bin.size();\n\t\tsize_t stride = sizeof(float) * components;\n\t\tfor (size_t i = 0; i < stream.data.size(); ++i)\n\t\t\tbin.append(reinterpret_cast(stream.data[i].f), stride);\n\n\t\tmeshopt_encodeFilterExp(&bin[offset], stream.data.size(), stride, bits + 1, reinterpret_cast(&bin[offset]), mode);\n\t}\n\telse\n\t{\n\t\tfor (size_t i = 0; i < stream.data.size(); ++i)\n\t\t{\n\t\t\tconst Attr& a = stream.data[i];\n\n\t\t\tfloat v[4];\n\t\t\tfor (int k = 0; k < components; ++k)\n\t\t\t\tv[k] = meshopt_quantizeFloat(a.f[k], bits);\n\t\t\tbin.append(reinterpret_cast(v), sizeof(float) * components);\n\t\t}\n\t}\n\n\tStreamFormat format = {type, cgltf_component_type_r_32f, false, sizeof(float) * components, filter};\n\treturn format;\n}\n\nStreamFormat writeVertexStream(std::string& bin, const Stream& stream, const QuantizationPosition& qp, const QuantizationTexture& qt, const Settings& settings, bool filters)\n{\n\tif (stream.type == cgltf_attribute_type_position)\n\t{\n\t\tif (!settings.quantize)\n\t\t\treturn writeVertexStreamRaw(bin, stream, cgltf_type_vec3, 3);\n\n\t\tif (settings.pos_float)\n\t\t\treturn writeVertexStreamFloat(bin, stream, cgltf_type_vec3, 3, settings.compress && filters, qp.bits,\n\t\t\t settings.compressmore ? meshopt_EncodeExpSharedComponent : meshopt_EncodeExpSeparate);\n\n\t\tif (stream.target == 0)\n\t\t{\n\t\t\tfloat pos_rscale = qp.scale == 0.f ? 0.f : 1.f / qp.scale;\n\n\t\t\tfor (size_t i = 0; i < stream.data.size(); ++i)\n\t\t\t{\n\t\t\t\tconst Attr& a = stream.data[i];\n\n\t\t\t\tuint16_t v[4] = {\n\t\t\t\t uint16_t(meshopt_quantizeUnorm((a.f[0] - qp.offset[0]) * pos_rscale, qp.bits)),\n\t\t\t\t uint16_t(meshopt_quantizeUnorm((a.f[1] - qp.offset[1]) * pos_rscale, qp.bits)),\n\t\t\t\t uint16_t(meshopt_quantizeUnorm((a.f[2] - qp.offset[2]) * pos_rscale, qp.bits)),\n\t\t\t\t 0};\n\t\t\t\tbin.append(reinterpret_cast(v), sizeof(v));\n\t\t\t}\n\n\t\t\tStreamFormat format = {cgltf_type_vec3, cgltf_component_type_r_16u, qp.normalized, 8};\n\t\t\treturn format;\n\t\t}\n\t\telse\n\t\t{\n\t\t\tfloat pos_rscale = qp.scale == 0.f ? 0.f : 1.f / qp.scale * (qp.normalized ? 32767.f / 65535.f : 1.f);\n\n\t\t\tint maxv = 0;\n\n\t\t\tfor (size_t i = 0; i < stream.data.size(); ++i)\n\t\t\t{\n\t\t\t\tconst Attr& a = stream.data[i];\n\n\t\t\t\tmaxv = std::max(maxv, meshopt_quantizeUnorm(fabsf(a.f[0]) * pos_rscale, qp.bits));\n\t\t\t\tmaxv = std::max(maxv, meshopt_quantizeUnorm(fabsf(a.f[1]) * pos_rscale, qp.bits));\n\t\t\t\tmaxv = std::max(maxv, meshopt_quantizeUnorm(fabsf(a.f[2]) * pos_rscale, qp.bits));\n\t\t\t}\n\n\t\t\tif (maxv <= 127 && !qp.normalized)\n\t\t\t{\n\t\t\t\tfor (size_t i = 0; i < stream.data.size(); ++i)\n\t\t\t\t{\n\t\t\t\t\tconst Attr& a = stream.data[i];\n\n\t\t\t\t\tint8_t v[4] = {\n\t\t\t\t\t int8_t((a.f[0] >= 0.f ? 1 : -1) * meshopt_quantizeUnorm(fabsf(a.f[0]) * pos_rscale, qp.bits)),\n\t\t\t\t\t int8_t((a.f[1] >= 0.f ? 1 : -1) * meshopt_quantizeUnorm(fabsf(a.f[1]) * pos_rscale, qp.bits)),\n\t\t\t\t\t int8_t((a.f[2] >= 0.f ? 1 : -1) * meshopt_quantizeUnorm(fabsf(a.f[2]) * pos_rscale, qp.bits)),\n\t\t\t\t\t 0};\n\t\t\t\t\tbin.append(reinterpret_cast(v), sizeof(v));\n\t\t\t\t}\n\n\t\t\t\tStreamFormat format = {cgltf_type_vec3, cgltf_component_type_r_8, false, 4};\n\t\t\t\treturn format;\n\t\t\t}\n\t\t\telse\n\t\t\t{\n\t\t\t\tfor (size_t i = 0; i < stream.data.size(); ++i)\n\t\t\t\t{\n\t\t\t\t\tconst Attr& a = stream.data[i];\n\n\t\t\t\t\tint16_t v[4] = {\n\t\t\t\t\t int16_t((a.f[0] >= 0.f ? 1 : -1) * meshopt_quantizeUnorm(fabsf(a.f[0]) * pos_rscale, qp.bits)),\n\t\t\t\t\t int16_t((a.f[1] >= 0.f ? 1 : -1) * meshopt_quantizeUnorm(fabsf(a.f[1]) * pos_rscale, qp.bits)),\n\t\t\t\t\t int16_t((a.f[2] >= 0.f ? 1 : -1) * meshopt_quantizeUnorm(fabsf(a.f[2]) * pos_rscale, qp.bits)),\n\t\t\t\t\t 0};\n\t\t\t\t\tbin.append(reinterpret_cast(v), sizeof(v));\n\t\t\t\t}\n\n\t\t\t\tStreamFormat format = {cgltf_type_vec3, cgltf_component_type_r_16, qp.normalized, 8};\n\t\t\t\treturn format;\n\t\t\t}\n\t\t}\n\t}\n\telse if (stream.type == cgltf_attribute_type_texcoord)\n\t{\n\t\tif (!settings.quantize)\n\t\t\treturn writeVertexStreamRaw(bin, stream, cgltf_type_vec2, 2);\n\n\t\t// expand the encoded range to ensure it covers [0..1) interval\n\t\t// this can slightly reduce precision but we should not need more precision inside 0..1, and this significantly improves compressed size when using encodeExpOne\n\t\tif (settings.tex_float)\n\t\t\treturn writeVertexStreamFloat(bin, stream, cgltf_type_vec2, 2, settings.compress && filters, qt.bits, meshopt_EncodeExpClamped);\n\n\t\tfloat uv_rscale[2] = {\n\t\t qt.scale[0] == 0.f ? 0.f : 1.f / qt.scale[0],\n\t\t qt.scale[1] == 0.f ? 0.f : 1.f / qt.scale[1],\n\t\t};\n\n\t\tfor (size_t i = 0; i < stream.data.size(); ++i)\n\t\t{\n\t\t\tconst Attr& a = stream.data[i];\n\n\t\t\tuint16_t v[2] = {\n\t\t\t uint16_t(meshopt_quantizeUnorm((a.f[0] - qt.offset[0]) * uv_rscale[0], qt.bits)),\n\t\t\t uint16_t(meshopt_quantizeUnorm((a.f[1] - qt.offset[1]) * uv_rscale[1], qt.bits)),\n\t\t\t};\n\t\t\tbin.append(reinterpret_cast(v), sizeof(v));\n\t\t}\n\n\t\tStreamFormat format = {cgltf_type_vec2, cgltf_component_type_r_16u, qt.normalized, 4};\n\t\treturn format;\n\t}\n\telse if (stream.type == cgltf_attribute_type_normal)\n\t{\n\t\tif (!settings.quantize)\n\t\t\treturn writeVertexStreamRaw(bin, stream, cgltf_type_vec3, 3);\n\n\t\t// expand the encoded range to ensure it covers [0..1) interval\n\t\tif (settings.nrm_float)\n\t\t\treturn writeVertexStreamFloat(bin, stream, cgltf_type_vec3, 3, settings.compress && filters, settings.nrm_bits,\n\t\t\t (settings.compressmore || stream.target) ? meshopt_EncodeExpSharedComponent : meshopt_EncodeExpClamped);\n\n\t\tbool oct = filters && settings.compressmore && stream.target == 0;\n\t\tint bits = settings.nrm_bits;\n\n\t\tStreamFormat::Filter filter = oct ? StreamFormat::Filter_Oct : StreamFormat::Filter_None;\n\n\t\tsize_t offset = bin.size();\n\t\tsize_t stride = bits > 8 ? 8 : 4;\n\t\tbin.resize(bin.size() + stream.data.size() * stride);\n\n\t\tif (oct)\n\t\t\tmeshopt_encodeFilterOct(&bin[offset], stream.data.size(), stride, bits, stream.data[0].f);\n\t\telse\n\t\t\tencodeSnorm(&bin[offset], stream.data.size(), stride, bits, stream.data[0].f);\n\n\t\tcgltf_component_type component_type = bits > 8 ? cgltf_component_type_r_16 : cgltf_component_type_r_8;\n\t\tStreamFormat format = {cgltf_type_vec3, component_type, true, stride, filter};\n\t\treturn format;\n\t}\n\telse if (stream.type == cgltf_attribute_type_tangent)\n\t{\n\t\tif (!settings.quantize)\n\t\t\treturn writeVertexStreamRaw(bin, stream, cgltf_type_vec4, 4);\n\n\t\tbool oct = filters && settings.compressmore && stream.target == 0;\n\t\tint bits = (settings.nrm_bits > 8) ? 8 : settings.nrm_bits;\n\n\t\tStreamFormat::Filter filter = oct ? StreamFormat::Filter_Oct : StreamFormat::Filter_None;\n\n\t\tsize_t offset = bin.size();\n\t\tsize_t stride = 4;\n\t\tbin.resize(bin.size() + stream.data.size() * stride);\n\n\t\tif (oct)\n\t\t\tmeshopt_encodeFilterOct(&bin[offset], stream.data.size(), stride, bits, stream.data[0].f);\n\t\telse\n\t\t\tencodeSnorm(&bin[offset], stream.data.size(), stride, bits, stream.data[0].f);\n\n\t\tcgltf_type type = (stream.target == 0) ? cgltf_type_vec4 : cgltf_type_vec3;\n\t\tStreamFormat format = {type, cgltf_component_type_r_8, true, 4, filter};\n\t\treturn format;\n\t}\n\telse if (stream.type == cgltf_attribute_type_color)\n\t{\n\t\tbool col = filters && settings.compresskhr && settings.compressmore;\n\t\tint bits = settings.col_bits;\n\n\t\tStreamFormat::Filter filter = col ? StreamFormat::Filter_Color : StreamFormat::Filter_None;\n\n\t\tsize_t offset = bin.size();\n\t\tsize_t stride = bits > 8 ? 8 : 4;\n\t\tbin.resize(bin.size() + stream.data.size() * stride);\n\n\t\tif (col)\n\t\t\tmeshopt_encodeFilterColor(&bin[offset], stream.data.size(), stride, bits, stream.data[0].f);\n\t\telse\n\t\t\tencodeColor(&bin[offset], stream.data.size(), stride, bits, stream.data[0].f);\n\n\t\tif (bits > 8)\n\t\t{\n\t\t\tStreamFormat format = {cgltf_type_vec4, cgltf_component_type_r_16u, true, 8, filter};\n\t\t\treturn format;\n\t\t}\n\t\telse\n\t\t{\n\t\t\tStreamFormat format = {cgltf_type_vec4, cgltf_component_type_r_8u, true, 4, filter};\n\t\t\treturn format;\n\t\t}\n\t}\n\telse if (stream.type == cgltf_attribute_type_weights)\n\t{\n\t\tfor (size_t i = 0; i < stream.data.size(); ++i)\n\t\t{\n\t\t\tconst Attr& a = stream.data[i];\n\n\t\t\tfloat ws = a.f[0] + a.f[1] + a.f[2] + a.f[3];\n\t\t\tfloat wsi = (ws == 0.f) ? 0.f : 1.f / ws;\n\n\t\t\tuint8_t v[4] = {\n\t\t\t uint8_t(meshopt_quantizeUnorm(a.f[0] * wsi, 8)),\n\t\t\t uint8_t(meshopt_quantizeUnorm(a.f[1] * wsi, 8)),\n\t\t\t uint8_t(meshopt_quantizeUnorm(a.f[2] * wsi, 8)),\n\t\t\t uint8_t(meshopt_quantizeUnorm(a.f[3] * wsi, 8))};\n\n\t\t\tif (wsi != 0.f)\n\t\t\t\trenormalizeWeights(v);\n\n\t\t\tbin.append(reinterpret_cast(v), sizeof(v));\n\t\t}\n\n\t\tStreamFormat format = {cgltf_type_vec4, cgltf_component_type_r_8u, true, 4};\n\t\treturn format;\n\t}\n\telse if (stream.type == cgltf_attribute_type_joints)\n\t{\n\t\tunsigned int maxj = 0;\n\n\t\tfor (size_t i = 0; i < stream.data.size(); ++i)\n\t\t\tmaxj = std::max(maxj, unsigned(stream.data[i].f[0]));\n\n\t\tassert(maxj <= 65535);\n\n\t\tif (maxj <= 255)\n\t\t{\n\t\t\tfor (size_t i = 0; i < stream.data.size(); ++i)\n\t\t\t{\n\t\t\t\tconst Attr& a = stream.data[i];\n\n\t\t\t\tuint8_t v[4] = {\n\t\t\t\t uint8_t(a.f[0]),\n\t\t\t\t uint8_t(a.f[1]),\n\t\t\t\t uint8_t(a.f[2]),\n\t\t\t\t uint8_t(a.f[3])};\n\t\t\t\tbin.append(reinterpret_cast(v), sizeof(v));\n\t\t\t}\n\n\t\t\tStreamFormat format = {cgltf_type_vec4, cgltf_component_type_r_8u, false, 4};\n\t\t\treturn format;\n\t\t}\n\t\telse\n\t\t{\n\t\t\tfor (size_t i = 0; i < stream.data.size(); ++i)\n\t\t\t{\n\t\t\t\tconst Attr& a = stream.data[i];\n\n\t\t\t\tuint16_t v[4] = {\n\t\t\t\t uint16_t(a.f[0]),\n\t\t\t\t uint16_t(a.f[1]),\n\t\t\t\t uint16_t(a.f[2]),\n\t\t\t\t uint16_t(a.f[3])};\n\t\t\t\tbin.append(reinterpret_cast(v), sizeof(v));\n\t\t\t}\n\n\t\t\tStreamFormat format = {cgltf_type_vec4, cgltf_component_type_r_16u, false, 8};\n\t\t\treturn format;\n\t\t}\n\t}\n\telse if (stream.type == cgltf_attribute_type_custom)\n\t{\n\t\t// note: _custom is equivalent to _ID, as such the data contains scalar integers\n\t\tif (!settings.compressmore || !filters)\n\t\t\treturn writeVertexStreamRaw(bin, stream, cgltf_type_scalar, 1);\n\n\t\tunsigned int maxv = 0;\n\n\t\tfor (size_t i = 0; i < stream.data.size(); ++i)\n\t\t\tmaxv = std::max(maxv, unsigned(stream.data[i].f[0]));\n\n\t\t// exp encoding uses a signed mantissa with only 23 significant bits; input glTF encoding may encode indices losslessly up to 2^24\n\t\tif (maxv >= (1 << 23))\n\t\t\treturn writeVertexStreamRaw(bin, stream, cgltf_type_scalar, 1);\n\n\t\tfor (size_t i = 0; i < stream.data.size(); ++i)\n\t\t{\n\t\t\tconst Attr& a = stream.data[i];\n\n\t\t\tuint32_t id = uint32_t(a.f[0]);\n\t\t\tuint32_t v = id; // exp encoding of integers in [0..2^23-1] range is equivalent to the integer itself\n\n\t\t\tbin.append(reinterpret_cast(&v), sizeof(v));\n\t\t}\n\n\t\tStreamFormat format = {cgltf_type_scalar, cgltf_component_type_r_32f, false, 4, StreamFormat::Filter_Exp};\n\t\treturn format;\n\t}\n\telse\n\t{\n\t\treturn writeVertexStreamRaw(bin, stream, cgltf_type_vec4, 4);\n\t}\n}\n\nStreamFormat writeIndexStream(std::string& bin, const std::vector& stream)\n{\n\tunsigned int maxi = 0;\n\tfor (size_t i = 0; i < stream.size(); ++i)\n\t\tmaxi = std::max(maxi, stream[i]);\n\n\t// save 16-bit indices if we can; note that we can't use restart index (65535)\n\tif (maxi < 65535)\n\t{\n\t\tfor (size_t i = 0; i < stream.size(); ++i)\n\t\t{\n\t\t\tuint16_t v[1] = {uint16_t(stream[i])};\n\t\t\tbin.append(reinterpret_cast(v), sizeof(v));\n\t\t}\n\n\t\tStreamFormat format = {cgltf_type_scalar, cgltf_component_type_r_16u, false, 2};\n\t\treturn format;\n\t}\n\telse\n\t{\n\t\tfor (size_t i = 0; i < stream.size(); ++i)\n\t\t{\n\t\t\tuint32_t v[1] = {stream[i]};\n\t\t\tbin.append(reinterpret_cast(v), sizeof(v));\n\t\t}\n\n\t\tStreamFormat format = {cgltf_type_scalar, cgltf_component_type_r_32u, false, 4};\n\t\treturn format;\n\t}\n}\n\nStreamFormat writeTimeStream(std::string& bin, const std::vector& data)\n{\n\tfor (size_t i = 0; i < data.size(); ++i)\n\t{\n\t\tfloat v[1] = {data[i]};\n\t\tbin.append(reinterpret_cast(v), sizeof(v));\n\t}\n\n\tStreamFormat format = {cgltf_type_scalar, cgltf_component_type_r_32f, false, 4};\n\treturn format;\n}\n\nStreamFormat writeKeyframeStream(std::string& bin, cgltf_animation_path_type type, const std::vector& data, const Settings& settings, bool has_tangents)\n{\n\tif (type == cgltf_animation_path_type_rotation)\n\t{\n\t\tStreamFormat::Filter filter = settings.compressmore && !has_tangents ? StreamFormat::Filter_Quat : StreamFormat::Filter_None;\n\n\t\tsize_t offset = bin.size();\n\t\tsize_t stride = 8;\n\t\tbin.resize(bin.size() + data.size() * stride);\n\n\t\tif (filter == StreamFormat::Filter_Quat)\n\t\t\tmeshopt_encodeFilterQuat(&bin[offset], data.size(), stride, settings.rot_bits, data[0].f);\n\t\telse\n\t\t\tencodeSnorm(&bin[offset], data.size(), stride, 16, data[0].f);\n\n\t\tStreamFormat format = {cgltf_type_vec4, cgltf_component_type_r_16, true, 8, filter};\n\t\treturn format;\n\t}\n\telse if (type == cgltf_animation_path_type_weights)\n\t{\n\t\tfor (size_t i = 0; i < data.size(); ++i)\n\t\t{\n\t\t\tconst Attr& a = data[i];\n\n\t\t\tuint8_t v[1] = {uint8_t(meshopt_quantizeUnorm(a.f[0], 8))};\n\t\t\tbin.append(reinterpret_cast(v), sizeof(v));\n\t\t}\n\n\t\tStreamFormat format = {cgltf_type_scalar, cgltf_component_type_r_8u, true, 1};\n\t\treturn format;\n\t}\n\telse if (type == cgltf_animation_path_type_translation || type == cgltf_animation_path_type_scale)\n\t{\n\t\tStreamFormat::Filter filter = settings.compressmore ? StreamFormat::Filter_Exp : StreamFormat::Filter_None;\n\t\tint bits = (type == cgltf_animation_path_type_translation) ? settings.trn_bits : settings.scl_bits;\n\n\t\tsize_t offset = bin.size();\n\n\t\tfor (size_t i = 0; i < data.size(); ++i)\n\t\t{\n\t\t\tconst Attr& a = data[i];\n\n\t\t\tfloat v[3] = {a.f[0], a.f[1], a.f[2]};\n\t\t\tbin.append(reinterpret_cast(v), sizeof(v));\n\t\t}\n\n\t\tif (filter == StreamFormat::Filter_Exp)\n\t\t\tmeshopt_encodeFilterExp(&bin[offset], data.size(), 12, bits, reinterpret_cast(&bin[offset]), meshopt_EncodeExpSharedVector);\n\n\t\tStreamFormat format = {cgltf_type_vec3, cgltf_component_type_r_32f, false, 12, filter};\n\t\treturn format;\n\t}\n\telse\n\t{\n\t\tfor (size_t i = 0; i < data.size(); ++i)\n\t\t{\n\t\t\tconst Attr& a = data[i];\n\n\t\t\tfloat v[4] = {a.f[0], a.f[1], a.f[2], a.f[3]};\n\t\t\tbin.append(reinterpret_cast(v), sizeof(v));\n\t\t}\n\n\t\tStreamFormat format = {cgltf_type_vec4, cgltf_component_type_r_32f, false, 16};\n\t\treturn format;\n\t}\n}\n\nvoid compressVertexStream(std::string& bin, const std::string& data, size_t count, size_t stride, int level)\n{\n\tassert(data.size() == count * stride);\n\n\tstd::vector compressed(meshopt_encodeVertexBufferBound(count, stride));\n\tsize_t size = meshopt_encodeVertexBufferLevel(&compressed[0], compressed.size(), data.c_str(), count, stride, level, level > 0);\n\n\tbin.append(reinterpret_cast(&compressed[0]), size);\n}\n\nvoid compressIndexStream(std::string& bin, const std::string& data, size_t count, size_t stride)\n{\n\tassert(stride == 2 || stride == 4);\n\tassert(data.size() == count * stride);\n\tassert(count % 3 == 0);\n\n\tstd::vector compressed(meshopt_encodeIndexBufferBound(count, count));\n\tsize_t size = 0;\n\n\tif (stride == 2)\n\t\tsize = meshopt_encodeIndexBuffer(&compressed[0], compressed.size(), reinterpret_cast(data.c_str()), count);\n\telse\n\t\tsize = meshopt_encodeIndexBuffer(&compressed[0], compressed.size(), reinterpret_cast(data.c_str()), count);\n\n\tbin.append(reinterpret_cast(&compressed[0]), size);\n}\n\nvoid compressIndexSequence(std::string& bin, const std::string& data, size_t count, size_t stride)\n{\n\tassert(stride == 2 || stride == 4);\n\tassert(data.size() == count * stride);\n\n\tstd::vector compressed(meshopt_encodeIndexSequenceBound(count, count));\n\tsize_t size = 0;\n\n\tif (stride == 2)\n\t\tsize = meshopt_encodeIndexSequence(&compressed[0], compressed.size(), reinterpret_cast(data.c_str()), count);\n\telse\n\t\tsize = meshopt_encodeIndexSequence(&compressed[0], compressed.size(), reinterpret_cast(data.c_str()), count);\n\n\tbin.append(reinterpret_cast(&compressed[0]), size);\n}\n" }, { "path": "gltf/wasistubs.cpp", "content": "#ifdef __wasi__\n#include \n#include \n\n#include \n\nextern \"C\" void __cxa_throw(void* ptr, void* type, void* destructor)\n{\n\tabort();\n}\n\nextern \"C\" void* __cxa_allocate_exception(size_t thrown_size)\n{\n\tabort();\n}\n\nextern \"C\" int32_t __wasi_path_open32(int32_t arg0, int32_t arg1, int32_t arg2, int32_t arg3, int32_t arg4, int32_t arg5, int32_t arg6, int32_t arg7, int32_t arg8)\n __attribute__((\n __import_module__(\"wasi_snapshot_preview1\"),\n __import_name__(\"path_open32\"),\n __warn_unused_result__));\n\nextern \"C\" int32_t __imported_wasi_snapshot_preview1_path_open(int32_t arg0, int32_t arg1, int32_t arg2, int32_t arg3, int32_t arg4, int64_t arg5, int64_t arg6, int32_t arg7, int32_t arg8)\n{\n\treturn __wasi_path_open32(arg0, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8);\n}\n\nextern \"C\" int32_t __wasi_fd_seek32(int32_t arg0, int32_t arg1, int32_t arg2, int32_t arg3)\n __attribute__((\n __import_module__(\"wasi_snapshot_preview1\"),\n __import_name__(\"fd_seek32\"),\n __warn_unused_result__));\n\nextern \"C\" int32_t __imported_wasi_snapshot_preview1_fd_seek(int32_t arg0, int64_t arg1, int32_t arg2, int32_t arg3)\n{\n\t*(uint64_t*)arg3 = 0;\n\treturn __wasi_fd_seek32(arg0, arg1, arg2, arg3);\n}\n\nextern \"C\" int32_t __imported_wasi_snapshot_preview1_clock_time_get(int32_t arg0, int64_t arg1, int32_t arg2)\n{\n\treturn __WASI_ERRNO_NOSYS;\n}\n\n#endif\n" }, { "path": "gltf/wasistubs.txt", "content": "__wasi_path_open32\n__wasi_fd_seek32\n" }, { "path": "gltf/write.cpp", "content": "// This file is part of gltfpack; see gltfpack.h for version/license details\n#include \"gltfpack.h\"\n\n#include \n#include \n#include \n#include \n\nstatic const char* componentType(cgltf_component_type type)\n{\n\tswitch (type)\n\t{\n\tcase cgltf_component_type_r_8:\n\t\treturn \"5120\";\n\tcase cgltf_component_type_r_8u:\n\t\treturn \"5121\";\n\tcase cgltf_component_type_r_16:\n\t\treturn \"5122\";\n\tcase cgltf_component_type_r_16u:\n\t\treturn \"5123\";\n\tcase cgltf_component_type_r_32u:\n\t\treturn \"5125\";\n\tcase cgltf_component_type_r_32f:\n\t\treturn \"5126\";\n\tdefault:\n\t\treturn \"0\";\n\t}\n}\n\nstatic const char* shapeType(cgltf_type type)\n{\n\tswitch (type)\n\t{\n\tcase cgltf_type_scalar:\n\t\treturn \"SCALAR\";\n\tcase cgltf_type_vec2:\n\t\treturn \"VEC2\";\n\tcase cgltf_type_vec3:\n\t\treturn \"VEC3\";\n\tcase cgltf_type_vec4:\n\t\treturn \"VEC4\";\n\tcase cgltf_type_mat2:\n\t\treturn \"MAT2\";\n\tcase cgltf_type_mat3:\n\t\treturn \"MAT3\";\n\tcase cgltf_type_mat4:\n\t\treturn \"MAT4\";\n\tdefault:\n\t\treturn \"\";\n\t}\n}\n\nconst char* attributeType(cgltf_attribute_type type)\n{\n\tswitch (type)\n\t{\n\tcase cgltf_attribute_type_position:\n\t\treturn \"POSITION\";\n\tcase cgltf_attribute_type_normal:\n\t\treturn \"NORMAL\";\n\tcase cgltf_attribute_type_tangent:\n\t\treturn \"TANGENT\";\n\tcase cgltf_attribute_type_texcoord:\n\t\treturn \"TEXCOORD\";\n\tcase cgltf_attribute_type_color:\n\t\treturn \"COLOR\";\n\tcase cgltf_attribute_type_joints:\n\t\treturn \"JOINTS\";\n\tcase cgltf_attribute_type_weights:\n\t\treturn \"WEIGHTS\";\n\tcase cgltf_attribute_type_custom:\n\t\treturn \"CUSTOM\";\n\tdefault:\n\t\treturn \"ATTRIBUTE\";\n\t}\n}\n\nconst char* animationPath(cgltf_animation_path_type type)\n{\n\tswitch (type)\n\t{\n\tcase cgltf_animation_path_type_translation:\n\t\treturn \"translation\";\n\tcase cgltf_animation_path_type_rotation:\n\t\treturn \"rotation\";\n\tcase cgltf_animation_path_type_scale:\n\t\treturn \"scale\";\n\tcase cgltf_animation_path_type_weights:\n\t\treturn \"weights\";\n\tdefault:\n\t\treturn \"\";\n\t}\n}\n\nstatic const char* lightType(cgltf_light_type type)\n{\n\tswitch (type)\n\t{\n\tcase cgltf_light_type_directional:\n\t\treturn \"directional\";\n\tcase cgltf_light_type_point:\n\t\treturn \"point\";\n\tcase cgltf_light_type_spot:\n\t\treturn \"spot\";\n\tdefault:\n\t\treturn \"\";\n\t}\n}\n\nstatic const char* alphaMode(cgltf_alpha_mode mode)\n{\n\tswitch (mode)\n\t{\n\tcase cgltf_alpha_mode_opaque:\n\t\treturn \"OPAQUE\";\n\tcase cgltf_alpha_mode_mask:\n\t\treturn \"MASK\";\n\tcase cgltf_alpha_mode_blend:\n\t\treturn \"BLEND\";\n\tdefault:\n\t\treturn \"\";\n\t}\n}\n\nstatic const char* interpolationType(cgltf_interpolation_type type)\n{\n\tswitch (type)\n\t{\n\tcase cgltf_interpolation_type_linear:\n\t\treturn \"LINEAR\";\n\tcase cgltf_interpolation_type_step:\n\t\treturn \"STEP\";\n\tcase cgltf_interpolation_type_cubic_spline:\n\t\treturn \"CUBICSPLINE\";\n\tdefault:\n\t\treturn \"\";\n\t}\n}\n\nstatic const char* compressionMode(BufferView::Compression mode)\n{\n\tswitch (mode)\n\t{\n\tcase BufferView::Compression_Attribute:\n\t\treturn \"ATTRIBUTES\";\n\n\tcase BufferView::Compression_Index:\n\t\treturn \"TRIANGLES\";\n\n\tcase BufferView::Compression_IndexSequence:\n\t\treturn \"INDICES\";\n\n\tdefault:\n\t\treturn \"\";\n\t}\n}\n\nstatic const char* compressionFilter(StreamFormat::Filter filter)\n{\n\tswitch (filter)\n\t{\n\tcase StreamFormat::Filter_None:\n\t\treturn \"NONE\";\n\n\tcase StreamFormat::Filter_Oct:\n\t\treturn \"OCTAHEDRAL\";\n\n\tcase StreamFormat::Filter_Quat:\n\t\treturn \"QUATERNION\";\n\n\tcase StreamFormat::Filter_Exp:\n\t\treturn \"EXPONENTIAL\";\n\n\tcase StreamFormat::Filter_Color:\n\t\treturn \"COLOR\";\n\n\tdefault:\n\t\treturn \"\";\n\t}\n}\n\nstatic void writeTextureInfo(std::string& json, const cgltf_data* data, const cgltf_texture_view& view, const QuantizationTexture* qt, std::vector& textures, const char* scale = NULL)\n{\n\tassert(view.texture);\n\n\tbool has_transform = false;\n\tcgltf_texture_transform transform = {};\n\ttransform.scale[0] = transform.scale[1] = 1.f;\n\n\tif (hasValidTransform(view))\n\t{\n\t\ttransform = view.transform;\n\t\thas_transform = true;\n\t}\n\n\tif (qt)\n\t{\n\t\ttransform.offset[0] += qt->offset[0];\n\t\ttransform.offset[1] += qt->offset[1];\n\t\ttransform.scale[0] *= qt->scale[0] / float((1 << qt->bits) - 1) * (qt->normalized ? 65535.f : 1.f);\n\t\ttransform.scale[1] *= qt->scale[1] / float((1 << qt->bits) - 1) * (qt->normalized ? 65535.f : 1.f);\n\t\thas_transform = true;\n\t}\n\n\tappend(json, \"{\\\"index\\\":\");\n\tappend(json, size_t(textures[view.texture - data->textures].remap));\n\tif (view.texcoord != 0)\n\t{\n\t\tappend(json, \",\\\"texCoord\\\":\");\n\t\tappend(json, size_t(view.texcoord));\n\t}\n\tif (scale && view.scale != 1)\n\t{\n\t\tappend(json, \",\\\"\");\n\t\tappend(json, scale);\n\t\tappend(json, \"\\\":\");\n\t\tappend(json, view.scale);\n\t}\n\tif (has_transform)\n\t{\n\t\tappend(json, \",\\\"extensions\\\":{\\\"KHR_texture_transform\\\":{\");\n\t\tappend(json, \"\\\"offset\\\":\");\n\t\tappend(json, transform.offset, 2);\n\t\tappend(json, \",\\\"scale\\\":\");\n\t\tappend(json, transform.scale, 2);\n\t\tif (transform.rotation != 0.f)\n\t\t{\n\t\t\tappend(json, \",\\\"rotation\\\":\");\n\t\t\tappend(json, transform.rotation);\n\t\t}\n\t\tappend(json, \"}}\");\n\t}\n\tappend(json, \"}\");\n}\n\nstatic const float white[4] = {1, 1, 1, 1};\nstatic const float black[4] = {0, 0, 0, 0};\n\nstatic void writeMaterialComponent(std::string& json, const cgltf_data* data, const cgltf_pbr_metallic_roughness& pbr, const QuantizationTexture* qt, std::vector& textures)\n{\n\tcomma(json);\n\tappend(json, \"\\\"pbrMetallicRoughness\\\":{\");\n\tif (memcmp(pbr.base_color_factor, white, 16) != 0)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"baseColorFactor\\\":\");\n\t\tappend(json, pbr.base_color_factor, 4);\n\t}\n\tif (pbr.base_color_texture.texture)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"baseColorTexture\\\":\");\n\t\twriteTextureInfo(json, data, pbr.base_color_texture, qt, textures);\n\t}\n\tif (pbr.metallic_factor != 1)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"metallicFactor\\\":\");\n\t\tappend(json, pbr.metallic_factor);\n\t}\n\tif (pbr.roughness_factor != 1)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"roughnessFactor\\\":\");\n\t\tappend(json, pbr.roughness_factor);\n\t}\n\tif (pbr.metallic_roughness_texture.texture)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"metallicRoughnessTexture\\\":\");\n\t\twriteTextureInfo(json, data, pbr.metallic_roughness_texture, qt, textures);\n\t}\n\tappend(json, \"}\");\n}\n\nstatic void writeMaterialComponent(std::string& json, const cgltf_data* data, const cgltf_pbr_specular_glossiness& pbr, const QuantizationTexture* qt, std::vector& textures)\n{\n\tcomma(json);\n\tappend(json, \"\\\"KHR_materials_pbrSpecularGlossiness\\\":{\");\n\tif (pbr.diffuse_texture.texture)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"diffuseTexture\\\":\");\n\t\twriteTextureInfo(json, data, pbr.diffuse_texture, qt, textures);\n\t}\n\tif (pbr.specular_glossiness_texture.texture)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"specularGlossinessTexture\\\":\");\n\t\twriteTextureInfo(json, data, pbr.specular_glossiness_texture, qt, textures);\n\t}\n\tif (memcmp(pbr.diffuse_factor, white, 16) != 0)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"diffuseFactor\\\":\");\n\t\tappend(json, pbr.diffuse_factor, 4);\n\t}\n\tif (memcmp(pbr.specular_factor, white, 12) != 0)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"specularFactor\\\":\");\n\t\tappend(json, pbr.specular_factor, 3);\n\t}\n\tif (pbr.glossiness_factor != 1)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"glossinessFactor\\\":\");\n\t\tappend(json, pbr.glossiness_factor);\n\t}\n\tappend(json, \"}\");\n}\n\nstatic void writeMaterialComponent(std::string& json, const cgltf_data* data, const cgltf_clearcoat& cc, const QuantizationTexture* qt, std::vector& textures)\n{\n\tcomma(json);\n\tappend(json, \"\\\"KHR_materials_clearcoat\\\":{\");\n\tif (cc.clearcoat_texture.texture)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"clearcoatTexture\\\":\");\n\t\twriteTextureInfo(json, data, cc.clearcoat_texture, qt, textures);\n\t}\n\tif (cc.clearcoat_roughness_texture.texture)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"clearcoatRoughnessTexture\\\":\");\n\t\twriteTextureInfo(json, data, cc.clearcoat_roughness_texture, qt, textures);\n\t}\n\tif (cc.clearcoat_normal_texture.texture)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"clearcoatNormalTexture\\\":\");\n\t\twriteTextureInfo(json, data, cc.clearcoat_normal_texture, qt, textures, \"scale\");\n\t}\n\tif (cc.clearcoat_factor != 0)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"clearcoatFactor\\\":\");\n\t\tappend(json, cc.clearcoat_factor);\n\t}\n\tif (cc.clearcoat_factor != 0)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"clearcoatRoughnessFactor\\\":\");\n\t\tappend(json, cc.clearcoat_roughness_factor);\n\t}\n\tappend(json, \"}\");\n}\n\nstatic void writeMaterialComponent(std::string& json, const cgltf_data* data, const cgltf_transmission& tm, const QuantizationTexture* qt, std::vector& textures)\n{\n\tcomma(json);\n\tappend(json, \"\\\"KHR_materials_transmission\\\":{\");\n\tif (tm.transmission_texture.texture)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"transmissionTexture\\\":\");\n\t\twriteTextureInfo(json, data, tm.transmission_texture, qt, textures);\n\t}\n\tif (tm.transmission_factor != 0)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"transmissionFactor\\\":\");\n\t\tappend(json, tm.transmission_factor);\n\t}\n\tappend(json, \"}\");\n}\n\nstatic void writeMaterialComponent(std::string& json, const cgltf_data* data, const cgltf_ior& tm)\n{\n\t(void)data;\n\n\tcomma(json);\n\tappend(json, \"\\\"KHR_materials_ior\\\":{\");\n\tappend(json, \"\\\"ior\\\":\");\n\tappend(json, tm.ior);\n\tappend(json, \"}\");\n}\n\nstatic void writeMaterialComponent(std::string& json, const cgltf_data* data, const cgltf_specular& tm, const QuantizationTexture* qt, std::vector& textures)\n{\n\tcomma(json);\n\tappend(json, \"\\\"KHR_materials_specular\\\":{\");\n\tif (tm.specular_texture.texture)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"specularTexture\\\":\");\n\t\twriteTextureInfo(json, data, tm.specular_texture, qt, textures);\n\t}\n\tif (tm.specular_color_texture.texture)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"specularColorTexture\\\":\");\n\t\twriteTextureInfo(json, data, tm.specular_color_texture, qt, textures);\n\t}\n\tif (tm.specular_factor != 1)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"specularFactor\\\":\");\n\t\tappend(json, tm.specular_factor);\n\t}\n\tif (memcmp(tm.specular_color_factor, white, 12) != 0)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"specularColorFactor\\\":\");\n\t\tappend(json, tm.specular_color_factor, 3);\n\t}\n\tappend(json, \"}\");\n}\n\nstatic void writeMaterialComponent(std::string& json, const cgltf_data* data, const cgltf_sheen& tm, const QuantizationTexture* qt, std::vector& textures)\n{\n\tcomma(json);\n\tappend(json, \"\\\"KHR_materials_sheen\\\":{\");\n\tif (tm.sheen_color_texture.texture)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"sheenColorTexture\\\":\");\n\t\twriteTextureInfo(json, data, tm.sheen_color_texture, qt, textures);\n\t}\n\tif (tm.sheen_roughness_texture.texture)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"sheenRoughnessTexture\\\":\");\n\t\twriteTextureInfo(json, data, tm.sheen_roughness_texture, qt, textures);\n\t}\n\tif (memcmp(tm.sheen_color_factor, black, 12) != 0)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"sheenColorFactor\\\":\");\n\t\tappend(json, tm.sheen_color_factor, 3);\n\t}\n\tif (tm.sheen_roughness_factor != 0)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"sheenRoughnessFactor\\\":\");\n\t\tappend(json, tm.sheen_roughness_factor);\n\t}\n\tappend(json, \"}\");\n}\n\nstatic void writeMaterialComponent(std::string& json, const cgltf_data* data, const cgltf_volume& tm, const QuantizationPosition* qp, const QuantizationTexture* qt, std::vector& textures)\n{\n\tcomma(json);\n\tappend(json, \"\\\"KHR_materials_volume\\\":{\");\n\tif (tm.thickness_texture.texture)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"thicknessTexture\\\":\");\n\t\twriteTextureInfo(json, data, tm.thickness_texture, qt, textures);\n\t}\n\tif (tm.thickness_factor != 0)\n\t{\n\t\t// thickness is in mesh coordinate space which is rescaled by quantization\n\t\tcomma(json);\n\t\tappend(json, \"\\\"thicknessFactor\\\":\");\n\t\tappend(json, tm.thickness_factor / (qp ? qp->node_scale : 1.f));\n\t}\n\tif (memcmp(tm.attenuation_color, white, 12) != 0)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"attenuationColor\\\":\");\n\t\tappend(json, tm.attenuation_color, 3);\n\t}\n\tif (tm.attenuation_distance != FLT_MAX)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"attenuationDistance\\\":\");\n\t\tappend(json, tm.attenuation_distance);\n\t}\n\tappend(json, \"}\");\n}\n\nstatic void writeMaterialComponent(std::string& json, const cgltf_data* data, const cgltf_emissive_strength& tm)\n{\n\t(void)data;\n\n\tcomma(json);\n\tappend(json, \"\\\"KHR_materials_emissive_strength\\\":{\");\n\tif (tm.emissive_strength != 1)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"emissiveStrength\\\":\");\n\t\tappend(json, tm.emissive_strength);\n\t}\n\tappend(json, \"}\");\n}\n\nstatic void writeMaterialComponent(std::string& json, const cgltf_data* data, const cgltf_iridescence& tm, const QuantizationTexture* qt, std::vector& textures)\n{\n\tcomma(json);\n\tappend(json, \"\\\"KHR_materials_iridescence\\\":{\");\n\tif (tm.iridescence_factor != 0)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"iridescenceFactor\\\":\");\n\t\tappend(json, tm.iridescence_factor);\n\t}\n\tif (tm.iridescence_texture.texture)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"iridescenceTexture\\\":\");\n\t\twriteTextureInfo(json, data, tm.iridescence_texture, qt, textures);\n\t}\n\tif (tm.iridescence_ior != 1.3f)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"iridescenceIor\\\":\");\n\t\tappend(json, tm.iridescence_ior);\n\t}\n\tif (tm.iridescence_thickness_min != 100.f)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"iridescenceThicknessMinimum\\\":\");\n\t\tappend(json, tm.iridescence_thickness_min);\n\t}\n\tif (tm.iridescence_thickness_max != 400.f)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"iridescenceThicknessMaximum\\\":\");\n\t\tappend(json, tm.iridescence_thickness_max);\n\t}\n\tif (tm.iridescence_thickness_texture.texture)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"iridescenceThicknessTexture\\\":\");\n\t\twriteTextureInfo(json, data, tm.iridescence_thickness_texture, qt, textures);\n\t}\n\tappend(json, \"}\");\n}\n\nstatic void writeMaterialComponent(std::string& json, const cgltf_data* data, const cgltf_anisotropy& tm, const QuantizationTexture* qt, std::vector& textures)\n{\n\tcomma(json);\n\tappend(json, \"\\\"KHR_materials_anisotropy\\\":{\");\n\tif (tm.anisotropy_strength != 0)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"anisotropyStrength\\\":\");\n\t\tappend(json, tm.anisotropy_strength);\n\t}\n\tif (tm.anisotropy_rotation != 0)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"anisotropyRotation\\\":\");\n\t\tappend(json, tm.anisotropy_rotation);\n\t}\n\tif (tm.anisotropy_texture.texture)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"anisotropyTexture\\\":\");\n\t\twriteTextureInfo(json, data, tm.anisotropy_texture, qt, textures);\n\t}\n\tappend(json, \"}\");\n}\n\nstatic void writeMaterialComponent(std::string& json, const cgltf_data* data, const cgltf_dispersion& tm)\n{\n\t(void)data;\n\n\tcomma(json);\n\tappend(json, \"\\\"KHR_materials_dispersion\\\":{\");\n\tappend(json, \"\\\"dispersion\\\":\");\n\tappend(json, tm.dispersion);\n\tappend(json, \"}\");\n}\n\nstatic void writeMaterialComponent(std::string& json, const cgltf_data* data, const cgltf_diffuse_transmission& tm, const QuantizationTexture* qt, std::vector& textures)\n{\n\tcomma(json);\n\tappend(json, \"\\\"KHR_materials_diffuse_transmission\\\":{\");\n\tif (tm.diffuse_transmission_factor != 0)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"diffuseTransmissionFactor\\\":\");\n\t\tappend(json, tm.diffuse_transmission_factor);\n\t}\n\tif (tm.diffuse_transmission_texture.texture)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"diffuseTransmissionTexture\\\":\");\n\t\twriteTextureInfo(json, data, tm.diffuse_transmission_texture, qt, textures);\n\t}\n\tif (memcmp(tm.diffuse_transmission_color_factor, white, sizeof(float) * 3) != 0)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"diffuseTransmissionColorFactor\\\":\");\n\t\tappend(json, tm.diffuse_transmission_color_factor, 3);\n\t}\n\tif (tm.diffuse_transmission_color_texture.texture)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"diffuseTransmissionColorTexture\\\":\");\n\t\twriteTextureInfo(json, data, tm.diffuse_transmission_color_texture, qt, textures);\n\t}\n\tappend(json, \"}\");\n}\n\nvoid writeMaterial(std::string& json, const cgltf_data* data, const cgltf_material& material, const QuantizationPosition* qp, const QuantizationTexture* qt, std::vector& textures)\n{\n\tif (material.name && *material.name)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"name\\\":\\\"\");\n\t\tappend(json, material.name);\n\t\tappend(json, \"\\\"\");\n\t}\n\n\tif (material.has_pbr_metallic_roughness)\n\t{\n\t\twriteMaterialComponent(json, data, material.pbr_metallic_roughness, qt, textures);\n\t}\n\n\tif (material.normal_texture.texture)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"normalTexture\\\":\");\n\t\twriteTextureInfo(json, data, material.normal_texture, qt, textures, \"scale\");\n\t}\n\n\tif (material.occlusion_texture.texture)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"occlusionTexture\\\":\");\n\t\twriteTextureInfo(json, data, material.occlusion_texture, qt, textures, \"strength\");\n\t}\n\n\tif (material.emissive_texture.texture)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"emissiveTexture\\\":\");\n\t\twriteTextureInfo(json, data, material.emissive_texture, qt, textures);\n\t}\n\n\tif (memcmp(material.emissive_factor, black, 12) != 0)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"emissiveFactor\\\":\");\n\t\tappend(json, material.emissive_factor, 3);\n\t}\n\n\tif (material.alpha_mode != cgltf_alpha_mode_opaque)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"alphaMode\\\":\\\"\");\n\t\tappend(json, alphaMode(material.alpha_mode));\n\t\tappend(json, \"\\\"\");\n\t}\n\n\tif (material.alpha_cutoff != 0.5f)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"alphaCutoff\\\":\");\n\t\tappend(json, material.alpha_cutoff);\n\t}\n\n\tif (material.double_sided)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"doubleSided\\\":true\");\n\t}\n\n\tif (material.has_pbr_specular_glossiness || material.has_clearcoat || material.has_transmission || material.has_ior || material.has_specular ||\n\t material.has_sheen || material.has_volume || material.has_emissive_strength || material.has_iridescence || material.has_anisotropy ||\n\t material.has_dispersion || material.has_diffuse_transmission || material.unlit)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"extensions\\\":{\");\n\n\t\tif (material.has_pbr_specular_glossiness)\n\t\t\twriteMaterialComponent(json, data, material.pbr_specular_glossiness, qt, textures);\n\n\t\tif (material.has_clearcoat)\n\t\t\twriteMaterialComponent(json, data, material.clearcoat, qt, textures);\n\n\t\tif (material.has_transmission)\n\t\t\twriteMaterialComponent(json, data, material.transmission, qt, textures);\n\n\t\tif (material.has_ior)\n\t\t\twriteMaterialComponent(json, data, material.ior);\n\n\t\tif (material.has_specular)\n\t\t\twriteMaterialComponent(json, data, material.specular, qt, textures);\n\n\t\tif (material.has_sheen)\n\t\t\twriteMaterialComponent(json, data, material.sheen, qt, textures);\n\n\t\tif (material.has_volume)\n\t\t\twriteMaterialComponent(json, data, material.volume, qp, qt, textures);\n\n\t\tif (material.has_emissive_strength)\n\t\t\twriteMaterialComponent(json, data, material.emissive_strength);\n\n\t\tif (material.has_iridescence)\n\t\t\twriteMaterialComponent(json, data, material.iridescence, qt, textures);\n\n\t\tif (material.has_anisotropy)\n\t\t\twriteMaterialComponent(json, data, material.anisotropy, qt, textures);\n\n\t\tif (material.has_dispersion)\n\t\t\twriteMaterialComponent(json, data, material.dispersion);\n\n\t\tif (material.has_diffuse_transmission)\n\t\t\twriteMaterialComponent(json, data, material.diffuse_transmission, qt, textures);\n\n\t\tif (material.unlit)\n\t\t{\n\t\t\tcomma(json);\n\t\t\tappend(json, \"\\\"KHR_materials_unlit\\\":{}\");\n\t\t}\n\n\t\tappend(json, \"}\");\n\t}\n}\n\nsize_t getBufferView(std::vector& views, BufferView::Kind kind, StreamFormat::Filter filter, BufferView::Compression compression, size_t stride, int variant)\n{\n\tif (variant >= 0)\n\t{\n\t\tfor (size_t i = 0; i < views.size(); ++i)\n\t\t{\n\t\t\tBufferView& v = views[i];\n\n\t\t\tif (v.kind == kind && v.filter == filter && v.compression == compression && v.stride == stride && v.variant == variant)\n\t\t\t\treturn i;\n\t\t}\n\t}\n\n\tBufferView view = {kind, filter, compression, stride, variant};\n\tviews.push_back(view);\n\n\treturn views.size() - 1;\n}\n\nvoid writeBufferView(std::string& json, BufferView::Kind kind, StreamFormat::Filter filter, size_t count, size_t stride, size_t bin_offset, size_t bin_size, BufferView::Compression compression, size_t compressed_offset, size_t compressed_size, const char* meshopt_ext)\n{\n\tassert(bin_size == count * stride);\n\n\t// when compression is enabled, we store uncompressed data in buffer 1 and compressed data in buffer 0\n\t// when compression is disabled, we store uncompressed data in buffer 0\n\tsize_t buffer = compression != BufferView::Compression_None ? 1 : 0;\n\n\tappend(json, \"{\\\"buffer\\\":\");\n\tappend(json, buffer);\n\tappend(json, \",\\\"byteOffset\\\":\");\n\tappend(json, bin_offset);\n\tappend(json, \",\\\"byteLength\\\":\");\n\tappend(json, bin_size);\n\tif (kind == BufferView::Kind_Vertex)\n\t{\n\t\tappend(json, \",\\\"byteStride\\\":\");\n\t\tappend(json, stride);\n\t}\n\tif (kind == BufferView::Kind_Vertex || kind == BufferView::Kind_Index)\n\t{\n\t\tappend(json, \",\\\"target\\\":\");\n\t\tappend(json, (kind == BufferView::Kind_Vertex) ? \"34962\" : \"34963\");\n\t}\n\tif (compression != BufferView::Compression_None)\n\t{\n\t\tappend(json, \",\\\"extensions\\\":{\");\n\t\tappend(json, \"\\\"\");\n\t\tappend(json, meshopt_ext);\n\t\tappend(json, \"\\\":{\");\n\t\tappend(json, \"\\\"buffer\\\":0\");\n\t\tappend(json, \",\\\"byteOffset\\\":\");\n\t\tappend(json, size_t(compressed_offset));\n\t\tappend(json, \",\\\"byteLength\\\":\");\n\t\tappend(json, size_t(compressed_size));\n\t\tappend(json, \",\\\"byteStride\\\":\");\n\t\tappend(json, stride);\n\t\tappend(json, \",\\\"mode\\\":\\\"\");\n\t\tappend(json, compressionMode(compression));\n\t\tappend(json, \"\\\"\");\n\t\tif (filter != StreamFormat::Filter_None)\n\t\t{\n\t\t\tappend(json, \",\\\"filter\\\":\\\"\");\n\t\t\tappend(json, compressionFilter(filter));\n\t\t\tappend(json, \"\\\"\");\n\t\t}\n\t\tappend(json, \",\\\"count\\\":\");\n\t\tappend(json, count);\n\t\tappend(json, \"}}\");\n\t}\n\tappend(json, \"}\");\n}\n\nstatic void writeAccessor(std::string& json, size_t view, size_t offset, cgltf_type type, cgltf_component_type component_type, bool normalized, size_t count, const float* min = NULL, const float* max = NULL, size_t numminmax = 0)\n{\n\tappend(json, \"{\\\"bufferView\\\":\");\n\tappend(json, view);\n\tappend(json, \",\\\"byteOffset\\\":\");\n\tappend(json, offset);\n\tappend(json, \",\\\"componentType\\\":\");\n\tappend(json, componentType(component_type));\n\tappend(json, \",\\\"count\\\":\");\n\tappend(json, count);\n\tappend(json, \",\\\"type\\\":\\\"\");\n\tappend(json, shapeType(type));\n\tappend(json, \"\\\"\");\n\n\tif (normalized)\n\t{\n\t\tappend(json, \",\\\"normalized\\\":true\");\n\t}\n\n\tif (min && max)\n\t{\n\t\tassert(numminmax);\n\n\t\tappend(json, \",\\\"min\\\":\");\n\t\tappend(json, min, numminmax);\n\t\tappend(json, \",\\\"max\\\":\");\n\t\tappend(json, max, numminmax);\n\t}\n\n\tappend(json, \"}\");\n}\n\nstatic void writeEmbeddedImage(std::string& json, std::vector& views, const char* data, size_t size, const char* mime_type, TextureKind kind)\n{\n\tsize_t view = getBufferView(views, BufferView::Kind_Image, StreamFormat::Filter_None, BufferView::Compression_None, 1, -1 - kind);\n\n\tassert(views[view].data.empty());\n\tviews[view].data.assign(data, size);\n\n\tappend(json, \"\\\"bufferView\\\":\");\n\tappend(json, view);\n\tappend(json, \",\\\"mimeType\\\":\\\"\");\n\tappend(json, mime_type);\n\tappend(json, \"\\\"\");\n}\n\nstatic std::string decodeUri(const char* uri)\n{\n\tstd::string result = uri;\n\n\tif (!result.empty())\n\t{\n\t\tcgltf_decode_uri(&result[0]);\n\t\tresult.resize(strlen(result.c_str()));\n\t}\n\n\treturn result;\n}\n\nvoid writeSampler(std::string& json, const cgltf_sampler& sampler)\n{\n\tif (sampler.mag_filter != cgltf_filter_type_undefined)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"magFilter\\\":\");\n\t\tappend(json, size_t(sampler.mag_filter));\n\t}\n\tif (sampler.min_filter != cgltf_filter_type_undefined)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"minFilter\\\":\");\n\t\tappend(json, size_t(sampler.min_filter));\n\t}\n\tif (sampler.wrap_s != cgltf_wrap_mode_repeat)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"wrapS\\\":\");\n\t\tappend(json, size_t(sampler.wrap_s));\n\t}\n\tif (sampler.wrap_t != cgltf_wrap_mode_repeat)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"wrapT\\\":\");\n\t\tappend(json, size_t(sampler.wrap_t));\n\t}\n}\n\nstatic void writeImageError(std::string& json, const char* action, size_t index, const char* uri, const char* reason)\n{\n\tappend(json, \"\\\"uri\\\":\\\"\");\n\tappend(json, \"data:image/png;base64,ERR/\");\n\tappend(json, \"\\\"\");\n\n\tfprintf(stderr, \"Warning: unable to %s image %d (%s), skipping%s%s%s\\n\", action, int(index), uri ? uri : \"embedded\", reason ? \" (\" : \"\", reason ? reason : \"\", reason ? \")\" : \"\");\n}\n\nstatic void writeImageData(std::string& json, std::vector& views, size_t index, const char* uri, const char* mime_type, const std::string& contents, const char* output_path, TextureKind kind, bool embed)\n{\n\tbool dataUri = uri && strncmp(uri, \"data:\", 5) == 0;\n\n\tif (!embed && uri && !dataUri && output_path)\n\t{\n\t\tstd::string file_name = getFileName(uri) + mimeExtension(mime_type);\n\t\tstd::string file_path = getFullPath(decodeUri(file_name.c_str()).c_str(), output_path);\n\n\t\tif (writeFile(file_path.c_str(), contents))\n\t\t{\n\t\t\tappend(json, \"\\\"uri\\\":\\\"\");\n\t\t\tappend(json, file_name);\n\t\t\tappend(json, \"\\\"\");\n\t\t}\n\t\telse\n\t\t{\n\t\t\twriteImageError(json, \"save\", int(index), uri, file_path.c_str());\n\t\t}\n\t}\n\telse\n\t{\n\t\twriteEmbeddedImage(json, views, contents.c_str(), contents.size(), mime_type, kind);\n\t}\n}\n\nvoid writeImage(std::string& json, std::vector& views, const cgltf_image& image, const ImageInfo& info, const std::string* encoded, size_t index, const char* input_path, const char* output_path, const Settings& settings)\n{\n\tif (image.name && *image.name)\n\t{\n\t\tappend(json, \"\\\"name\\\":\\\"\");\n\t\tappend(json, image.name);\n\t\tappend(json, \"\\\",\");\n\t}\n\n\tif (encoded)\n\t{\n\t\tconst char* mime_type = (settings.texture_mode[info.kind] == TextureMode_WebP) ? \"image/webp\" : \"image/ktx2\";\n\n\t\t// image was pre-encoded via encodeImages (which might have failed!)\n\t\tif (encoded->compare(0, 5, \"error\") == 0)\n\t\t\twriteImageError(json, \"encode\", int(index), image.uri, encoded->c_str());\n\t\telse\n\t\t\twriteImageData(json, views, index, image.uri, mime_type, *encoded, output_path, info.kind, settings.texture_embed);\n\t\treturn;\n\t}\n\n\tbool dataUri = image.uri && strncmp(image.uri, \"data:\", 5) == 0;\n\n\tif (image.uri && !dataUri && settings.texture_ref)\n\t{\n\t\t// fast-path: we don't need to read the image to memory\n\t\tappend(json, \"\\\"uri\\\":\\\"\");\n\t\tappend(json, image.uri);\n\t\tappend(json, \"\\\"\");\n\t\treturn;\n\t}\n\n\tstd::string img_data;\n\tstd::string mime_type;\n\tif (!readImage(image, input_path, img_data, mime_type))\n\t{\n\t\twriteImageError(json, \"read\", index, image.uri, NULL);\n\t\treturn;\n\t}\n\n\twriteImageData(json, views, index, image.uri, mime_type.c_str(), img_data, output_path, info.kind, settings.texture_embed);\n}\n\nvoid writeTexture(std::string& json, const cgltf_texture& texture, const ImageInfo* info, cgltf_data* data, const Settings& settings)\n{\n\tif (texture.sampler)\n\t{\n\t\tappend(json, \"\\\"sampler\\\":\");\n\t\tappend(json, size_t(texture.sampler - data->samplers));\n\t}\n\n\tif (texture.image)\n\t{\n\t\tif (info && settings.texture_mode[info->kind] != TextureMode_Raw)\n\t\t{\n\t\t\tconst char* texture_ext = (settings.texture_mode[info->kind] == TextureMode_WebP) ? \"EXT_texture_webp\" : \"KHR_texture_basisu\";\n\n\t\t\tcomma(json);\n\t\t\tappend(json, \"\\\"extensions\\\":{\\\"\");\n\t\t\tappend(json, texture_ext);\n\t\t\tappend(json, \"\\\":{\\\"source\\\":\");\n\t\t\tappend(json, size_t(texture.image - data->images));\n\t\t\tappend(json, \"}}\");\n\n\t\t\treturn; // skip input basisu image if present, as we replace it with the one we encoded\n\t\t}\n\t\telse\n\t\t{\n\t\t\tcomma(json);\n\t\t\tappend(json, \"\\\"source\\\":\");\n\t\t\tappend(json, size_t(texture.image - data->images));\n\t\t}\n\t}\n\n\tif (texture.basisu_image)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"extensions\\\":{\\\"KHR_texture_basisu\\\":{\\\"source\\\":\");\n\t\tappend(json, size_t(texture.basisu_image - data->images));\n\t\tappend(json, \"}}\");\n\t}\n\telse if (texture.webp_image)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"extensions\\\":{\\\"EXT_texture_webp\\\":{\\\"source\\\":\");\n\t\tappend(json, size_t(texture.webp_image - data->images));\n\t\tappend(json, \"}}\");\n\t}\n}\n\nstatic void writePrimitiveAccessor(std::string& json_accessors, const Stream& stream, size_t view, size_t offset, const StreamFormat& format, const QuantizationPosition& qp, const Settings& settings)\n{\n\tcomma(json_accessors);\n\tif (stream.type == cgltf_attribute_type_position)\n\t{\n\t\tfloat min[3] = {};\n\t\tfloat max[3] = {};\n\t\tgetPositionBounds(min, max, stream, qp, settings);\n\n\t\twriteAccessor(json_accessors, view, offset, format.type, format.component_type, format.normalized, stream.data.size(), min, max, 3);\n\t}\n\telse\n\t{\n\t\twriteAccessor(json_accessors, view, offset, format.type, format.component_type, format.normalized, stream.data.size());\n\t}\n}\n\nstatic void writePrimitiveAttribute(std::string& json, const Stream& stream, size_t accessor)\n{\n\tcomma(json);\n\tappend(json, \"\\\"\");\n\tif (stream.custom_name)\n\t{\n\t\tappend(json, stream.custom_name);\n\t}\n\telse\n\t{\n\t\tappend(json, attributeType(stream.type));\n\t\tif (stream.type != cgltf_attribute_type_position && stream.type != cgltf_attribute_type_normal && stream.type != cgltf_attribute_type_tangent)\n\t\t{\n\t\t\tappend(json, \"_\");\n\t\t\tappend(json, size_t(stream.index));\n\t\t}\n\t}\n\tappend(json, \"\\\":\");\n\tappend(json, accessor);\n}\n\nstatic void writeMeshAttributesInterleaved(std::string& json, std::vector& views, std::string& json_accessors, size_t& accr_offset, const Mesh& mesh, int target, const QuantizationPosition& qp, const QuantizationTexture& qt, const Settings& settings)\n{\n\tstruct Attribute\n\t{\n\t\tconst Stream* stream;\n\t\tStreamFormat format;\n\t\tstd::string data;\n\t};\n\n\tstd::vector attributes;\n\tsize_t stride = 0;\n\n\tfor (size_t j = 0; j < mesh.streams.size(); ++j)\n\t{\n\t\tconst Stream& stream = mesh.streams[j];\n\n\t\tif (stream.target != target)\n\t\t\tcontinue;\n\n\t\tAttribute attr = {&stream};\n\t\tattr.format = writeVertexStream(attr.data, stream, qp, qt, settings, /* filters= */ false);\n\t\tassert(attr.format.filter == StreamFormat::Filter_None);\n\n\t\tstride += attr.format.stride;\n\t\tattributes.emplace_back(std::move(attr));\n\t}\n\n\tBufferView::Compression compression = settings.compress ? BufferView::Compression_Attribute : BufferView::Compression_None;\n\tsize_t view = getBufferView(views, BufferView::Kind_Vertex, StreamFormat::Filter_None, compression, stride, 0);\n\tsize_t offset = views[view].data.size();\n\n\tsize_t vertex_count = mesh.streams[0].data.size();\n\n\tviews[view].data.resize(views[view].data.size() + stride * vertex_count);\n\n\tsize_t write_offset = offset;\n\n\tfor (size_t i = 0; i < vertex_count; ++i)\n\t\tfor (Attribute& attr : attributes)\n\t\t{\n\t\t\tmemcpy(&views[view].data[write_offset], &attr.data[i * attr.format.stride], attr.format.stride);\n\t\t\twrite_offset += attr.format.stride;\n\t\t}\n\n\tfor (Attribute& attr : attributes)\n\t{\n\t\tconst Stream& stream = *attr.stream;\n\t\tconst StreamFormat& format = attr.format;\n\n\t\twritePrimitiveAccessor(json_accessors, stream, view, offset, format, qp, settings);\n\n\t\tsize_t vertex_accr = accr_offset++;\n\t\twritePrimitiveAttribute(json, stream, vertex_accr);\n\n\t\toffset += attr.format.stride;\n\t}\n}\n\nvoid writeMeshAttributes(std::string& json, std::vector& views, std::string& json_accessors, size_t& accr_offset, const Mesh& mesh, int target, const QuantizationPosition& qp, const QuantizationTexture& qt, const Settings& settings)\n{\n\tif (settings.mesh_interleaved)\n\t\treturn writeMeshAttributesInterleaved(json, views, json_accessors, accr_offset, mesh, target, qp, qt, settings);\n\n\tstd::string scratch;\n\n\tfor (size_t j = 0; j < mesh.streams.size(); ++j)\n\t{\n\t\tconst Stream& stream = mesh.streams[j];\n\n\t\tif (stream.target != target)\n\t\t\tcontinue;\n\n\t\tscratch.clear();\n\t\tStreamFormat format = writeVertexStream(scratch, stream, qp, qt, settings);\n\t\tBufferView::Compression compression = settings.compress ? BufferView::Compression_Attribute : BufferView::Compression_None;\n\n\t\tsize_t view = getBufferView(views, BufferView::Kind_Vertex, format.filter, compression, format.stride, stream.type);\n\t\tsize_t offset = views[view].data.size();\n\t\tviews[view].data += scratch;\n\n\t\twritePrimitiveAccessor(json_accessors, stream, view, offset, format, qp, settings);\n\n\t\tsize_t vertex_accr = accr_offset++;\n\t\twritePrimitiveAttribute(json, stream, vertex_accr);\n\t}\n}\n\nsize_t writeMeshIndices(std::vector& views, std::string& json_accessors, size_t& accr_offset, const std::vector& indices, cgltf_primitive_type type, const Settings& settings)\n{\n\tstd::string scratch;\n\tStreamFormat format = writeIndexStream(scratch, indices);\n\tBufferView::Compression compression = settings.compress ? (type == cgltf_primitive_type_triangles ? BufferView::Compression_Index : BufferView::Compression_IndexSequence) : BufferView::Compression_None;\n\n\tsize_t view = getBufferView(views, BufferView::Kind_Index, StreamFormat::Filter_None, compression, format.stride);\n\tsize_t offset = views[view].data.size();\n\tviews[view].data += scratch;\n\n\tcomma(json_accessors);\n\twriteAccessor(json_accessors, view, offset, format.type, format.component_type, format.normalized, indices.size());\n\n\tsize_t index_accr = accr_offset++;\n\treturn index_accr;\n}\n\nvoid writeMeshGeometry(std::string& json, std::vector& views, std::string& json_accessors, size_t& accr_offset, const Mesh& mesh, const QuantizationPosition& qp, const QuantizationTexture& qt, const Settings& settings)\n{\n\tappend(json, \"{\\\"attributes\\\":{\");\n\twriteMeshAttributes(json, views, json_accessors, accr_offset, mesh, 0, qp, qt, settings);\n\tappend(json, \"}\");\n\tif (mesh.type != cgltf_primitive_type_triangles)\n\t{\n\t\tappend(json, \",\\\"mode\\\":\");\n\t\tappend(json, size_t(mesh.type - cgltf_primitive_type_points));\n\t}\n\tif (mesh.targets)\n\t{\n\t\tappend(json, \",\\\"targets\\\":[\");\n\t\tfor (size_t j = 0; j < mesh.targets; ++j)\n\t\t{\n\t\t\tcomma(json);\n\t\t\tappend(json, \"{\");\n\t\t\twriteMeshAttributes(json, views, json_accessors, accr_offset, mesh, int(1 + j), qp, qt, settings);\n\t\t\tappend(json, \"}\");\n\t\t}\n\t\tappend(json, \"]\");\n\t}\n\n\tif (!mesh.indices.empty())\n\t{\n\t\tsize_t index_accr = writeMeshIndices(views, json_accessors, accr_offset, mesh.indices, mesh.type, settings);\n\n\t\tappend(json, \",\\\"indices\\\":\");\n\t\tappend(json, index_accr);\n\t}\n}\n\nstatic size_t writeAnimationTime(std::vector& views, std::string& json_accessors, size_t& accr_offset, const std::vector& time, const Settings& settings)\n{\n\tstd::string scratch;\n\tStreamFormat format = writeTimeStream(scratch, time);\n\tBufferView::Compression compression = settings.compress ? BufferView::Compression_Attribute : BufferView::Compression_None;\n\n\tsize_t view = getBufferView(views, BufferView::Kind_Time, StreamFormat::Filter_None, compression, format.stride);\n\tsize_t offset = views[view].data.size();\n\tviews[view].data += scratch;\n\n\tcomma(json_accessors);\n\twriteAccessor(json_accessors, view, offset, cgltf_type_scalar, format.component_type, format.normalized, time.size(), &time.front(), &time.back(), 1);\n\n\tsize_t time_accr = accr_offset++;\n\treturn time_accr;\n}\n\nstatic size_t writeAnimationTime(std::vector& views, std::string& json_accessors, size_t& accr_offset, float mint, int frames, float period, const Settings& settings)\n{\n\tstd::vector time(frames);\n\n\tfor (int j = 0; j < frames; ++j)\n\t\ttime[j] = mint + float(j) * period;\n\n\treturn writeAnimationTime(views, json_accessors, accr_offset, time, settings);\n}\n\nsize_t writeJointBindMatrices(std::vector& views, std::string& json_accessors, size_t& accr_offset, const cgltf_skin& skin, const QuantizationPosition& qp, const Settings& settings)\n{\n\tstd::string scratch;\n\n\tfor (size_t j = 0; j < skin.joints_count; ++j)\n\t{\n\t\tfloat transform[16] = {1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1};\n\n\t\tif (skin.inverse_bind_matrices)\n\t\t{\n\t\t\tcgltf_accessor_read_float(skin.inverse_bind_matrices, j, transform, 16);\n\t\t}\n\n\t\tif (settings.quantize && !settings.pos_float)\n\t\t{\n\t\t\t// pos_offset has to be applied first, thus it results in an offset rotated by the bind matrix\n\t\t\ttransform[12] += qp.offset[0] * transform[0] + qp.offset[1] * transform[4] + qp.offset[2] * transform[8];\n\t\t\ttransform[13] += qp.offset[0] * transform[1] + qp.offset[1] * transform[5] + qp.offset[2] * transform[9];\n\t\t\ttransform[14] += qp.offset[0] * transform[2] + qp.offset[1] * transform[6] + qp.offset[2] * transform[10];\n\n\t\t\t// node_scale will be applied before the rotation/scale from transform\n\t\t\tfor (int k = 0; k < 12; ++k)\n\t\t\t\ttransform[k] *= qp.node_scale;\n\t\t}\n\n\t\tscratch.append(reinterpret_cast(transform), sizeof(transform));\n\t}\n\n\tBufferView::Compression compression = settings.compress ? BufferView::Compression_Attribute : BufferView::Compression_None;\n\n\tsize_t view = getBufferView(views, BufferView::Kind_Skin, StreamFormat::Filter_None, compression, 64);\n\tsize_t offset = views[view].data.size();\n\tviews[view].data += scratch;\n\n\tcomma(json_accessors);\n\twriteAccessor(json_accessors, view, offset, cgltf_type_mat4, cgltf_component_type_r_32f, false, skin.joints_count);\n\n\tsize_t matrix_accr = accr_offset++;\n\treturn matrix_accr;\n}\n\nstatic void writeInstanceData(std::vector& views, std::string& json_accessors, cgltf_animation_path_type type, const std::vector& data, const Settings& settings)\n{\n\tBufferView::Compression compression = settings.compress ? BufferView::Compression_Attribute : BufferView::Compression_None;\n\n\tstd::string scratch;\n\tStreamFormat format = writeKeyframeStream(scratch, type, data, settings);\n\n\tsize_t view = getBufferView(views, BufferView::Kind_Instance, format.filter, compression, format.stride, type);\n\tsize_t offset = views[view].data.size();\n\tviews[view].data += scratch;\n\n\tcomma(json_accessors);\n\twriteAccessor(json_accessors, view, offset, format.type, format.component_type, format.normalized, data.size());\n}\n\nsize_t writeInstances(std::vector& views, std::string& json_accessors, size_t& accr_offset, const std::vector& instances, const QuantizationPosition& qp, bool has_color, const Settings& settings)\n{\n\tstd::vector position, rotation, scale;\n\tposition.resize(instances.size());\n\trotation.resize(instances.size());\n\tscale.resize(instances.size());\n\n\tStream color = {cgltf_attribute_type_color};\n\tif (has_color)\n\t\tcolor.data.resize(instances.size());\n\n\tfor (size_t i = 0; i < instances.size(); ++i)\n\t{\n\t\tdecomposeTransform(position[i].f, rotation[i].f, scale[i].f, instances[i].transform);\n\n\t\tif (settings.quantize && !settings.pos_float)\n\t\t{\n\t\t\tconst float* transform = instances[i].transform;\n\n\t\t\t// pos_offset has to be applied first, thus it results in an offset rotated by the instance matrix\n\t\t\tposition[i].f[0] += qp.offset[0] * transform[0] + qp.offset[1] * transform[4] + qp.offset[2] * transform[8];\n\t\t\tposition[i].f[1] += qp.offset[0] * transform[1] + qp.offset[1] * transform[5] + qp.offset[2] * transform[9];\n\t\t\tposition[i].f[2] += qp.offset[0] * transform[2] + qp.offset[1] * transform[6] + qp.offset[2] * transform[10];\n\n\t\t\t// node_scale will be applied before the rotation/scale from transform\n\t\t\tscale[i].f[0] *= qp.node_scale;\n\t\t\tscale[i].f[1] *= qp.node_scale;\n\t\t\tscale[i].f[2] *= qp.node_scale;\n\t\t}\n\n\t\tif (has_color)\n\t\t\tmemcpy(color.data[i].f, instances[i].color, sizeof(Attr));\n\t}\n\n\twriteInstanceData(views, json_accessors, cgltf_animation_path_type_translation, position, settings);\n\twriteInstanceData(views, json_accessors, cgltf_animation_path_type_rotation, rotation, settings);\n\twriteInstanceData(views, json_accessors, cgltf_animation_path_type_scale, scale, settings);\n\n\tsize_t result = accr_offset;\n\taccr_offset += 3;\n\n\tif (has_color)\n\t{\n\t\tBufferView::Compression compression = settings.compress ? BufferView::Compression_Attribute : BufferView::Compression_None;\n\n\t\tstd::string scratch;\n\t\tStreamFormat format = writeVertexStream(scratch, color, QuantizationPosition(), QuantizationTexture(), settings);\n\n\t\tsize_t view = getBufferView(views, BufferView::Kind_Instance, format.filter, compression, format.stride, 0);\n\t\tsize_t offset = views[view].data.size();\n\t\tviews[view].data += scratch;\n\n\t\tcomma(json_accessors);\n\t\twriteAccessor(json_accessors, view, offset, format.type, format.component_type, format.normalized, instances.size());\n\t\taccr_offset += 1;\n\t}\n\n\treturn result;\n}\n\nvoid writeMeshNode(std::string& json, size_t mesh_offset, cgltf_node* node, cgltf_skin* skin, cgltf_data* data, const QuantizationPosition* qp)\n{\n\tcomma(json);\n\tappend(json, \"{\\\"mesh\\\":\");\n\tappend(json, mesh_offset);\n\tif (skin)\n\t{\n\t\tappend(json, \",\\\"skin\\\":\");\n\t\tappend(json, size_t(skin - data->skins));\n\t}\n\tif (qp)\n\t{\n\t\tappend(json, \",\\\"translation\\\":\");\n\t\tappend(json, qp->offset, 3);\n\t\tappend(json, \",\\\"scale\\\":[\");\n\t\tappend(json, qp->node_scale);\n\t\tappend(json, \",\");\n\t\tappend(json, qp->node_scale);\n\t\tappend(json, \",\");\n\t\tappend(json, qp->node_scale);\n\t\tappend(json, \"]\");\n\t}\n\tif (node && node->weights_count)\n\t{\n\t\tappend(json, \",\\\"weights\\\":\");\n\t\tappend(json, node->weights, node->weights_count);\n\t}\n\tappend(json, \"}\");\n}\n\nvoid writeMeshNodeInstanced(std::string& json, size_t mesh_offset, size_t accr_offset, bool has_color)\n{\n\tcomma(json);\n\tappend(json, \"{\\\"mesh\\\":\");\n\tappend(json, mesh_offset);\n\tappend(json, \",\\\"extensions\\\":{\\\"EXT_mesh_gpu_instancing\\\":{\\\"attributes\\\":{\");\n\n\tcomma(json);\n\tappend(json, \"\\\"TRANSLATION\\\":\");\n\tappend(json, accr_offset + 0);\n\n\tcomma(json);\n\tappend(json, \"\\\"ROTATION\\\":\");\n\tappend(json, accr_offset + 1);\n\n\tcomma(json);\n\tappend(json, \"\\\"SCALE\\\":\");\n\tappend(json, accr_offset + 2);\n\n\tif (has_color)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"_COLOR_0\\\":\");\n\t\tappend(json, accr_offset + 3);\n\t}\n\n\tappend(json, \"}}}\");\n\tappend(json, \"}\");\n}\n\nvoid writeSkin(std::string& json, const cgltf_skin& skin, size_t matrix_accr, const std::vector& nodes, cgltf_data* data)\n{\n\tcomma(json);\n\tappend(json, \"{\");\n\tif (skin.name && *skin.name)\n\t{\n\t\tappend(json, \"\\\"name\\\":\\\"\");\n\t\tappend(json, skin.name);\n\t\tappend(json, \"\\\",\");\n\t}\n\tappend(json, \"\\\"joints\\\":[\");\n\tfor (size_t j = 0; j < skin.joints_count; ++j)\n\t{\n\t\tcomma(json);\n\t\tappend(json, size_t(nodes[skin.joints[j] - data->nodes].remap));\n\t}\n\tappend(json, \"]\");\n\tappend(json, \",\\\"inverseBindMatrices\\\":\");\n\tappend(json, matrix_accr);\n\tif (skin.skeleton)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"skeleton\\\":\");\n\t\tappend(json, size_t(nodes[skin.skeleton - data->nodes].remap));\n\t}\n\tappend(json, \"}\");\n}\n\nvoid writeNode(std::string& json, const cgltf_node& node, const std::vector& nodes, cgltf_data* data)\n{\n\tconst NodeInfo& ni = nodes[&node - data->nodes];\n\n\tif (node.name && *node.name)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"name\\\":\\\"\");\n\t\tappend(json, node.name);\n\t\tappend(json, \"\\\"\");\n\t}\n\tif (node.has_translation)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"translation\\\":\");\n\t\tappend(json, node.translation, 3);\n\t}\n\tif (node.has_rotation)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"rotation\\\":\");\n\t\tappend(json, node.rotation, 4);\n\t}\n\tif (node.has_scale)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"scale\\\":\");\n\t\tappend(json, node.scale, 3);\n\t}\n\tif (node.has_matrix)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"matrix\\\":\");\n\t\tappend(json, node.matrix, 16);\n\t}\n\n\tbool has_children = !ni.mesh_nodes.empty();\n\tfor (size_t j = 0; j < node.children_count; ++j)\n\t\thas_children |= nodes[node.children[j] - data->nodes].keep;\n\n\tif (has_children)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"children\\\":[\");\n\t\tfor (size_t j = 0; j < node.children_count; ++j)\n\t\t{\n\t\t\tconst NodeInfo& ci = nodes[node.children[j] - data->nodes];\n\n\t\t\tif (ci.keep)\n\t\t\t{\n\t\t\t\tcomma(json);\n\t\t\t\tappend(json, size_t(ci.remap));\n\t\t\t}\n\t\t}\n\t\tfor (size_t j = 0; j < ni.mesh_nodes.size(); ++j)\n\t\t{\n\t\t\tcomma(json);\n\t\t\tappend(json, ni.mesh_nodes[j]);\n\t\t}\n\t\tappend(json, \"]\");\n\t}\n\tif (ni.has_mesh)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"mesh\\\":\");\n\t\tappend(json, ni.mesh_index);\n\t\tif (ni.mesh_skin)\n\t\t{\n\t\t\tappend(json, \",\\\"skin\\\":\");\n\t\t\tappend(json, size_t(ni.mesh_skin - data->skins));\n\t\t}\n\t\tif (node.weights_count)\n\t\t{\n\t\t\tappend(json, \",\\\"weights\\\":\");\n\t\t\tappend(json, node.weights, node.weights_count);\n\t\t}\n\t}\n\tif (node.camera)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"camera\\\":\");\n\t\tappend(json, size_t(node.camera - data->cameras));\n\t}\n\tif (node.light)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"extensions\\\":{\\\"KHR_lights_punctual\\\":{\\\"light\\\":\");\n\t\tappend(json, size_t(node.light - data->lights));\n\t\tappend(json, \"}}\");\n\t}\n}\n\nvoid writeAnimation(std::string& json, std::vector& views, std::string& json_accessors, size_t& accr_offset, const Animation& animation, size_t i, cgltf_data* data, const std::vector& nodes, const Settings& settings)\n{\n\tstd::vector tracks;\n\n\tfor (size_t j = 0; j < animation.tracks.size(); ++j)\n\t{\n\t\tconst Track& track = animation.tracks[j];\n\n\t\tconst NodeInfo& ni = nodes[track.node - data->nodes];\n\n\t\tif (!ni.keep)\n\t\t\tcontinue;\n\n\t\tif (!settings.anim_const && (ni.animated_path_mask & (1 << track.path)) == 0)\n\t\t\tcontinue;\n\n\t\ttracks.push_back(&track);\n\t}\n\n\tif (tracks.empty())\n\t{\n\t\tfprintf(stderr, \"Warning: ignoring animation %d (%s) because it has no tracks with motion; use -ac to override\\n\", int(i), animation.name ? animation.name : \"\");\n\t\treturn;\n\t}\n\n\tbool needs_time = false;\n\tbool needs_pose = false;\n\n\tfor (size_t j = 0; j < tracks.size(); ++j)\n\t{\n\t\tconst Track& track = *tracks[j];\n\n#ifndef NDEBUG\n\t\tsize_t keyframe_size = (track.interpolation == cgltf_interpolation_type_cubic_spline) ? 3 : 1;\n\t\tsize_t time_size = track.constant ? 1 : (track.time.empty() ? animation.frames : track.time.size());\n\n\t\tassert(track.data.size() == keyframe_size * track.components * time_size);\n#endif\n\n\t\tneeds_time = needs_time || (track.time.empty() && !track.constant);\n\t\tneeds_pose = needs_pose || track.constant;\n\t}\n\n\tbool needs_range = needs_pose && !needs_time && animation.frames > 1;\n\n\tneeds_pose = needs_pose && !(needs_range && tracks.size() == 1);\n\n\tassert(int(needs_time) + int(needs_pose) + int(needs_range) <= 2);\n\n\tfloat animation_period = 1.f / float(settings.anim_freq);\n\tfloat animation_length = float(animation.frames - 1) * animation_period;\n\n\tsize_t time_accr = needs_time ? writeAnimationTime(views, json_accessors, accr_offset, animation.start, animation.frames, animation_period, settings) : 0;\n\tsize_t pose_accr = needs_pose ? writeAnimationTime(views, json_accessors, accr_offset, animation.start, 1, 0.f, settings) : 0;\n\tsize_t range_accr = needs_range ? writeAnimationTime(views, json_accessors, accr_offset, animation.start, 2, animation_length, settings) : 0;\n\n\tstd::string json_samplers;\n\tstd::string json_channels;\n\n\tsize_t track_offset = 0;\n\n\tsize_t last_track_time_accr = 0;\n\tconst Track* last_track_time = NULL;\n\n\tfor (size_t j = 0; j < tracks.size(); ++j)\n\t{\n\t\tconst Track& track = *tracks[j];\n\n\t\tbool range = needs_range && j == 0;\n\t\tint range_size = range ? 2 : 1;\n\n\t\tsize_t track_time_accr = time_accr;\n\t\tif (!track.time.empty())\n\t\t{\n\t\t\t// reuse time accessors between consecutive tracks if possible\n\t\t\tif (last_track_time && track.time == last_track_time->time)\n\t\t\t\ttrack_time_accr = last_track_time_accr;\n\t\t\telse\n\t\t\t{\n\t\t\t\ttrack_time_accr = writeAnimationTime(views, json_accessors, accr_offset, track.time, settings);\n\t\t\t\tlast_track_time_accr = track_time_accr;\n\t\t\t\tlast_track_time = &track;\n\t\t\t}\n\t\t}\n\n\t\tstd::string scratch;\n\t\tStreamFormat format = writeKeyframeStream(scratch, track.path, track.data, settings, track.interpolation == cgltf_interpolation_type_cubic_spline);\n\n\t\tif (range)\n\t\t{\n\t\t\tassert(range_size == 2);\n\t\t\tscratch += scratch;\n\t\t}\n\n\t\tBufferView::Compression compression = settings.compress && track.path != cgltf_animation_path_type_weights ? BufferView::Compression_Attribute : BufferView::Compression_None;\n\n\t\tsize_t view = getBufferView(views, BufferView::Kind_Keyframe, format.filter, compression, format.stride, track.path);\n\t\tsize_t offset = views[view].data.size();\n\t\tviews[view].data += scratch;\n\n\t\tcomma(json_accessors);\n\t\twriteAccessor(json_accessors, view, offset, format.type, format.component_type, format.normalized, track.data.size() * range_size);\n\n\t\tsize_t data_accr = accr_offset++;\n\n\t\tcomma(json_samplers);\n\t\tappend(json_samplers, \"{\\\"input\\\":\");\n\t\tappend(json_samplers, range ? range_accr : (track.constant ? pose_accr : track_time_accr));\n\t\tappend(json_samplers, \",\\\"output\\\":\");\n\t\tappend(json_samplers, data_accr);\n\t\tif (track.interpolation != cgltf_interpolation_type_linear)\n\t\t{\n\t\t\tappend(json_samplers, \",\\\"interpolation\\\":\\\"\");\n\t\t\tappend(json_samplers, interpolationType(track.interpolation));\n\t\t\tappend(json_samplers, \"\\\"\");\n\t\t}\n\t\tappend(json_samplers, \"}\");\n\n\t\tconst NodeInfo& tni = nodes[track.node - data->nodes];\n\t\tsize_t target_node = size_t(tni.remap);\n\n\t\t// when animating morph weights, quantization may move mesh assignments to a mesh node in which case we need to move the animation output\n\t\tif (track.path == cgltf_animation_path_type_weights && tni.mesh_nodes.size() == 1)\n\t\t\ttarget_node = tni.mesh_nodes[0];\n\n\t\tcomma(json_channels);\n\t\tappend(json_channels, \"{\\\"sampler\\\":\");\n\t\tappend(json_channels, track_offset);\n\t\tappend(json_channels, \",\\\"target\\\":{\\\"node\\\":\");\n\t\tappend(json_channels, target_node);\n\t\tappend(json_channels, \",\\\"path\\\":\\\"\");\n\t\tappend(json_channels, animationPath(track.path));\n\t\tappend(json_channels, \"\\\"}}\");\n\n\t\ttrack_offset++;\n\t}\n\n\tcomma(json);\n\tappend(json, \"{\");\n\tif (animation.name && *animation.name)\n\t{\n\t\tappend(json, \"\\\"name\\\":\\\"\");\n\t\tappend(json, animation.name);\n\t\tappend(json, \"\\\",\");\n\t}\n\tappend(json, \"\\\"samplers\\\":[\");\n\tappend(json, json_samplers);\n\tappend(json, \"],\\\"channels\\\":[\");\n\tappend(json, json_channels);\n\tappend(json, \"]}\");\n}\n\nvoid writeCamera(std::string& json, const cgltf_camera& camera)\n{\n\tcomma(json);\n\tappend(json, \"{\");\n\n\tswitch (camera.type)\n\t{\n\tcase cgltf_camera_type_perspective:\n\t\tappend(json, \"\\\"type\\\":\\\"perspective\\\",\\\"perspective\\\":{\");\n\t\tappend(json, \"\\\"yfov\\\":\");\n\t\tappend(json, camera.data.perspective.yfov);\n\t\tappend(json, \",\\\"znear\\\":\");\n\t\tappend(json, camera.data.perspective.znear);\n\t\tif (camera.data.perspective.aspect_ratio != 0.f)\n\t\t{\n\t\t\tappend(json, \",\\\"aspectRatio\\\":\");\n\t\t\tappend(json, camera.data.perspective.aspect_ratio);\n\t\t}\n\t\tif (camera.data.perspective.zfar != 0.f)\n\t\t{\n\t\t\tappend(json, \",\\\"zfar\\\":\");\n\t\t\tappend(json, camera.data.perspective.zfar);\n\t\t}\n\t\tappend(json, \"}\");\n\t\tbreak;\n\n\tcase cgltf_camera_type_orthographic:\n\t\tappend(json, \"\\\"type\\\":\\\"orthographic\\\",\\\"orthographic\\\":{\");\n\t\tappend(json, \"\\\"xmag\\\":\");\n\t\tappend(json, camera.data.orthographic.xmag);\n\t\tappend(json, \",\\\"ymag\\\":\");\n\t\tappend(json, camera.data.orthographic.ymag);\n\t\tappend(json, \",\\\"znear\\\":\");\n\t\tappend(json, camera.data.orthographic.znear);\n\t\tappend(json, \",\\\"zfar\\\":\");\n\t\tappend(json, camera.data.orthographic.zfar);\n\t\tappend(json, \"}\");\n\t\tbreak;\n\n\tdefault:\n\t\tfprintf(stderr, \"Warning: skipping camera of unknown type\\n\");\n\t}\n\n\tappend(json, \"}\");\n}\n\nvoid writeLight(std::string& json, const cgltf_light& light)\n{\n\tcomma(json);\n\tappend(json, \"{\\\"type\\\":\\\"\");\n\tappend(json, lightType(light.type));\n\tappend(json, \"\\\"\");\n\tif (memcmp(light.color, white, 12) != 0)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"color\\\":\");\n\t\tappend(json, light.color, 3);\n\t}\n\tif (light.intensity != 1.f)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"intensity\\\":\");\n\t\tappend(json, light.intensity);\n\t}\n\tif (light.range != 0.f)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"range\\\":\");\n\t\tappend(json, light.range);\n\t}\n\tif (light.type == cgltf_light_type_spot)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"spot\\\":{\");\n\t\tappend(json, \"\\\"innerConeAngle\\\":\");\n\t\tappend(json, light.spot_inner_cone_angle);\n\t\tappend(json, \",\\\"outerConeAngle\\\":\");\n\t\tappend(json, light.spot_outer_cone_angle == 0.f ? 0.78539816339f : light.spot_outer_cone_angle);\n\t\tappend(json, \"}\");\n\t}\n\tappend(json, \"}\");\n}\n\nvoid writeArray(std::string& json, const char* name, const std::string& contents)\n{\n\tif (contents.empty())\n\t\treturn;\n\n\tcomma(json);\n\tappend(json, \"\\\"\");\n\tappend(json, name);\n\tappend(json, \"\\\":[\");\n\tappend(json, contents);\n\tappend(json, \"]\");\n}\n\nvoid writeExtensions(std::string& json, const ExtensionInfo* extensions, size_t count)\n{\n\tbool used_extensions = false;\n\tbool required_extensions = false;\n\n\tfor (size_t i = 0; i < count; ++i)\n\t{\n\t\tused_extensions |= extensions[i].used;\n\t\trequired_extensions |= extensions[i].used && extensions[i].required;\n\t}\n\n\tif (used_extensions)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"extensionsUsed\\\":[\");\n\t\tfor (size_t i = 0; i < count; ++i)\n\t\t\tif (extensions[i].used)\n\t\t\t{\n\t\t\t\tcomma(json);\n\t\t\t\tappend(json, \"\\\"\");\n\t\t\t\tappend(json, extensions[i].name);\n\t\t\t\tappend(json, \"\\\"\");\n\t\t\t}\n\t\tappend(json, \"]\");\n\t}\n\n\tif (required_extensions)\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"extensionsRequired\\\":[\");\n\t\tfor (size_t i = 0; i < count; ++i)\n\t\t\tif (extensions[i].used && extensions[i].required)\n\t\t\t{\n\t\t\t\tcomma(json);\n\t\t\t\tappend(json, \"\\\"\");\n\t\t\t\tappend(json, extensions[i].name);\n\t\t\t\tappend(json, \"\\\"\");\n\t\t\t}\n\t\tappend(json, \"]\");\n\t}\n}\n\nvoid writeExtras(std::string& json, const cgltf_extras& extras)\n{\n\tif (!extras.data)\n\t\treturn;\n\n\tcomma(json);\n\tappend(json, \"\\\"extras\\\":\");\n\tappendJson(json, extras.data);\n}\n\nvoid writeScene(std::string& json, const cgltf_scene& scene, const std::string& roots, const Settings& settings)\n{\n\tcomma(json);\n\tappend(json, \"{\");\n\tif (scene.name && *scene.name)\n\t{\n\t\tappend(json, \"\\\"name\\\":\\\"\");\n\t\tappend(json, scene.name);\n\t\tappend(json, \"\\\"\");\n\t}\n\tif (!roots.empty())\n\t{\n\t\tcomma(json);\n\t\tappend(json, \"\\\"nodes\\\":[\");\n\t\tappend(json, roots);\n\t\tappend(json, \"]\");\n\t}\n\tif (settings.keep_extras)\n\t\twriteExtras(json, scene.extras);\n\tappend(json, \"}\");\n}\n" }, { "path": "js/README.md", "content": "# meshoptimizer.js\n\nThis folder contains JavaScript/WebAssembly modules that can be used to access parts of functionality of meshoptimizer library. While normally these would be used internally by glTF loaders, processors and other Web optimization tools, they can also be used directly if needed. The modules are available as an [NPM package](https://www.npmjs.com/package/meshoptimizer) but can also be redistributed individually on a file-by-file basis.\n\nWhen using the NPM package, package exports can be used to import individual components (e.g. `meshoptimizer/decoder`) as well as the entire package (`meshoptimizer`).\n\n## Structure\n\nEach component comes in a separate file, `meshopt_component.js`, which uses ES6 module exports and can be imported from another ES6 module. The export name is MeshoptComponent and is an object that has two fields:\n\n- `supported` is a boolean that can be checked to see if the component is supported by the current execution environment; it will generally be `false` when WebAssembly is not supported or enabled. To use these components on browsers without WebAssembly a polyfill library is recommended.\n- `ready` is a Promise that is resolved when WebAssembly compilation and initialization finishes; any functions are unsafe to call before that happens.\n\nIn addition to that, each component exposes a set of specific functions documented below.\n\n## Decoder\n\n`MeshoptDecoder` (`meshopt_decoder.mjs`) implements high performance decompression of attribute and index buffers encoded using meshopt compression. This can be used to decompress glTF buffers encoded with `EXT_meshopt_compression` extension or for custom geometry compression pipelines. The module contains two implementations, scalar and SIMD, with the best performing implementation selected automatically. When SIMD is available, the decoders run at 1-3 GB/s on modern desktop computers.\n\n> Note: for maximum compatibility, MeshoptDecoder is also available as CommonJS module via `meshopt_decoder.cjs`; it can be used by a wide variety of JavaScript module loaders, including node.js require(), AMD, Common.JS, and can also be loaded into the web page directly via a `