[
{
"path": ".github/FUNDING.yml",
"content": "# These are supported funding model platforms\n\ngithub: # Replace with up to 4 GitHub Sponsors-enabled usernames e.g., [user1, user2]\npatreon: # Replace with a single Patreon username\nopen_collective: # Replace with a single Open Collective username\nko_fi: # Replace with a single Ko-fi username\ntidelift: # Replace with a single Tidelift platform-name/package-name e.g., npm/babel\ncommunity_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry\nliberapay: # Replace with a single Liberapay username\nissuehunt: # Replace with a single IssueHunt username\nlfx_crowdfunding: # Replace with a single LFX Crowdfunding project-name e.g., cloud-foundry\npolar: # Replace with a single Polar username\nbuy_me_a_coffee: # Replace with a single Buy Me a Coffee username\nthanks_dev: # Replace with a single thanks.dev username\ncustom: ['https://paypal.me/KenNil'] # Replace with up to 4 custom sponsorship URLs e.g., ['link1', 'link2']\n"
},
{
"path": "CHANGE.log",
"content": "Change log for Cardinal Spline JS\n---------------------------------\n\n3.0.0\nChanges from this version can be seen in the git log itself.\n\n2.3.8\nBMP: Bumping version for NPM to obtain correct readme.\n\n2.3.7\nBMP: Bumping version for bower.\n\n2.3.6\nADD: Support empty point array as input (issue #5). Returns empty Float32Array.\n\n2.3.5\nADD: Documentation only (# of points required). Patch touched for bower (new tag).\n\n2.3.4\nADD: Node.js support for curve_func.js (added by @asmuelle)\n\n2.3.3\nADD: Node.js support for curve_calc.js\nIMP: Minor speed improvement\nFIX: Docs stated default segments value was 20, corrected to 25.\n\n2.3.1\nFIX: Made the extension more \"bullet-proof\" in case other extensions should happen to have the same name.\nFIX: JSDoc return type fixed (Array -> Float32Array).\nFIX: Minor touch-ups/improvements\nADD: Added two new file versions of the implementation - one pure function if you don't feel comfortable using\nextensions, as well as a pure mathematical function to return a point\narray for the spline without drawing anything (canvas not required with this version).\n\n2.3\nCHG: Using typed arrays also for resulting array (Float32)\nCHG: Default segment value is now 25 instead of 20 (dynamic approach is being considered).\nIMP: Speed improvements\nFIX: Fixed double point entries in result array\n\n2.2\nIMP: Using typed arrays internally for cached tension values for speed improvement\nREM: A left over and unnecessary console.log removed\n\n2.1.1\nFIX: When closed, length of close array was still reflecting total length internally resulting in empty entries\nas the closed section is calculated separately.\n\n2.1\nADD: New option: closed loop\nFIX: End point wasn't properly considered\n\n2.0\nADD: Optimized inner loop with a caching step\nCHG: Removed redundant code\nCHG: Cleaned up var declarations\nCHG: Removed internal moveTo() to conform better to context behavior in general\n\n\n(c) Epistemex 2013-2015\nLicense: MIT\n"
},
{
"path": "MIT-LICENSE.md",
"content": "The MIT License (MIT)\n\nCopyright (c) 2013-2018, 2024 Epistemex\n\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 of\nthe Software, and to permit persons to whom the Software is furnished to do so,\nsubject 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, FITNESS\nFOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR\nCOPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER\nIN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN\nCONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\n"
},
{
"path": "README.md",
"content": "Cardinal spline\n===============\n\nA Cardinal spline (basically a Catmull-Rom with a tension option)\nimplementation for JavaScript which creates an interpolated\nsmooth curve through each point pair in the given array. There is no\nneed to specify control points.\n\n\n\nAdditional options are to provide a closed spline as well as segment\nresolution (between each point) and of course a tension value.\n\n_Help keep the project alive by supporting the developer:_\n\n[](https://paypal.me/KenNil)\n\nThe archive comes with three separate versions for the sake of convenience:\n\n**curve.js**Canvas cardinal (smooth) curve extension - Epistemex \n\n\t\n\n\n\n\t\n\n\n\n\n\n"
},
{
"path": "docs/global.html",
"content": "\n\n\n\n\tcardinal-spline-js Global \n\n\t\n\t\n\t
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Methods \n\n \n \n\n (ctx, points, tension , numOfSeg , close ) → {Float32Array} \n\n \n \n \n
Draws a cardinal spline through given point array. Points must be arranged
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There must be a minimum of two points in the input array but the function
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The method continues previous path of the context. If you don't want that
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The points for the cardinal spline are returned as a new array.
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Parameters: \n \n\n\n \n\t\n\t\t\n\t\tName \n\t\t\n\n\t\tType \n\n\t\t\n\t\tArgument \n\t\t\n\n\t\t\n\t\tDefault \n\t\t\n\n\t\tDescription \n\t \n\t \n\n\t\n\t\n\n \n \n ctx\n \n \nCanvasRenderingContext2D \n\n \n \n \n\n \n\n \n \n \n\n \n \n \n \n \n\n context to use
\n\n\t\n\n \n \n points\n \n \nArray \n\n\n \n \n\n \n \n \n\n \n\n \n \n \n\n \n \n \n \n \n\n point array
\n\n\t\n\n \n \n tension\n \n \nNumber \n\n\n \n \n\n \n \n \n <optional> \n \n\n \n \n \n 0.5\n \n \n \n\n tension. Typically between [0.0, 1.0] but can be exceeded
\n\n\t\n\n \n \n numOfSeg\n \n \nNumber \n\n\n \n \n\n \n \n \n <optional> \n \n\n \n \n \n 25\n \n \n \n\n number of segments between two points (line resolution)
\n\n\t\n\n \n \n close\n \n \nBoolean \n\n\n \n \n\n \n \n \n <optional> \n \n\n \n \n \n false\n \n \n \n\n Close the ends making the line continuous
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\n\n \n \n \n\n\t\n\n\t\n\n\t\n\n\t\n\n\t\n\n\t\n\n\t\n\n\t\n\n\t\n\n\n\n\t\n\n\t\n\n\t\n\n\t\n \n\n \n \n\n \n\n \n \n \n \n \n Returns: \n \n \n\n
New array with the calculated points that was added to the path
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\n\t\n\t\tType\n\t \n\t\n\t\t\nFloat32Array \n\n\n\t \n \n\n\n \n \n \n \n\n \n \n\n (points, tension , numOfSeg , close ) → {Float32Array} \n\n \n \n \n
Calculates an array containing points representing a cardinal spline through given point array.
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There must be a minimum of two points in the input array but the function
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The points for the cardinal spline are returned as a new array.
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Parameters: \n \n\n\n \n\t\n\t\t\n\t\tName \n\t\t\n\n\t\tType \n\n\t\t\n\t\tArgument \n\t\t\n\n\t\t\n\t\tDefault \n\t\t\n\n\t\tDescription \n\t \n\t \n\n\t\n\t\n\n \n \n points\n \n \nArray \n\n\n \n \n\n \n \n \n\n \n\n \n \n \n\n \n \n \n \n \n\n point array
\n\n\t\n\n \n \n tension\n \n \nNumber \n\n\n \n \n\n \n \n \n <optional> \n \n\n \n \n \n 0.5\n \n \n \n\n tension. Typically between [0.0, 1.0] but can be exceeded
\n\n\t\n\n \n \n numOfSeg\n \n \nNumber \n\n\n \n \n\n \n \n \n <optional> \n \n\n \n \n \n 25\n \n \n \n\n number of segments between two points (line resolution)
\n\n\t\n\n \n \n close\n \n \nBoolean \n\n\n \n \n\n \n \n \n <optional> \n \n\n \n \n \n false\n \n \n \n\n Close the ends making the line continuous
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New array with the calculated points that was added to the path
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\n Cardinal spline A Cardinal spline (basically a Catmull-Rom with a tension option)
\n
\nAdditional options are to provide a closed spline as well as segment
\nThe archive comes with three separate versions for the sake of convenience:
\ncurve.js
\ncurve_func.js
\ncurve_calc.js
\nAs well as their minified equivalent. There are no dependencies between
\nInstall \nGit using HTTPS: git clone https://gitlab.com/epistemex/cardinal-spline-js.git \nGit using SSH: git clone git@gitlab.com:epistemex/cardinal-spline-js.git \nBower: bower install cardinal-spline-js \nNPM: npm install cardinal-spline-js (curve_calc.js / curve_func.js) \n \nUsage curve.js Make sure the script is loaded before a 2D context is obtained from the canvas element.
\nThen use curve() as any other method/function on the context -
\nExamples
\nctx.moveTo(points[0], points[1]); // optionally move to first point\nctx.curve(points); // add cardinal spline to path\nctx.stroke(); // stroke pathwill draw the points in the array which are arranged in the following manner:
\nvar points = [x1, y1, x2, y2, ... xn, yn];An optional tension value can be given (default: 0.5) :
\nctx.curve(points, 0.5); // sets tension [0.0, 1.0] +/-a segment resolution value (default: 25) :
\nctx.curve(points, 0.5, 25); // points in each segmentThe curve can be drawn closed. All arguments must be given in this(default: false (open)) :
\nctx.curve(points, 0.5, 25, true); // make a closed loopThe function returns a new (typed) array with the spline points which can be used for
\nvar splinePoints = ctx.curve(points);curve_func.js If you use the function file instead the arguments will be the same as
\nctx.moveTo(points[0], points[1]); // optionally move to first point\ncurve(ctx, points); // add cardinal spline to path\nctx.stroke(); // stroke pathAlso this variant returns a spline point array.
\ncurve_calc.js If you just want to calculate the spline points without drawing anything,curve_calc.js file and call (please observe that the
\nvar splinePoints = getCurvePoints(points, ...);Context is not required with this function.
\nIn Node.js Require the package after installing it using npm, then:
\nvar getCurvePoints = require("cardinal-spline-js").getCurvePoints;\nvar outPoints = getCurvePoints(inPoints);Requirements A modern HTML5 compliant browser with support for Typed Arrays andcurve_calc.js the canvas element and
\nLicense Released under MIT license . You can use this class in both commercial and non-commercial projects provided that full header (minified and developer versions) is included.
\n© 2013-2018 Epistemex
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![\"Demo](\"https://i.imgur.com/5e69T5C.png\")
![\"Epistemex\"](\"https://i.imgur.com/wZSsyt8.png\")