Repository: cabbibo/glsl-curl-noise
Branch: master
Commit: 4cdfe836cb7b
Files: 3
Total size: 1.3 KB

Directory structure:
gitextract_ou03zz3r/

├── .gitignore
├── curl.glsl
└── package.json

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FILE CONTENTS
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FILE: .gitignore
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node_modules


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FILE: curl.glsl
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#pragma glslify: snoise = require(glsl-noise/simplex/3d)

vec3 snoiseVec3( vec3 x ){

  float s  = snoise(vec3( x ));
  float s1 = snoise(vec3( x.y - 19.1 , x.z + 33.4 , x.x + 47.2 ));
  float s2 = snoise(vec3( x.z + 74.2 , x.x - 124.5 , x.y + 99.4 ));
  vec3 c = vec3( s , s1 , s2 );
  return c;

}


vec3 curlNoise( vec3 p ){
  
  const float e = .1;
  vec3 dx = vec3( e   , 0.0 , 0.0 );
  vec3 dy = vec3( 0.0 , e   , 0.0 );
  vec3 dz = vec3( 0.0 , 0.0 , e   );

  vec3 p_x0 = snoiseVec3( p - dx );
  vec3 p_x1 = snoiseVec3( p + dx );
  vec3 p_y0 = snoiseVec3( p - dy );
  vec3 p_y1 = snoiseVec3( p + dy );
  vec3 p_z0 = snoiseVec3( p - dz );
  vec3 p_z1 = snoiseVec3( p + dz );

  float x = p_y1.z - p_y0.z - p_z1.y + p_z0.y;
  float y = p_z1.x - p_z0.x - p_x1.z + p_x0.z;
  float z = p_x1.y - p_x0.y - p_y1.x + p_y0.x;

  const float divisor = 1.0 / ( 2.0 * e );
  return normalize( vec3( x , y , z ) * divisor );

}

#pragma glslify: export(curlNoise)


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FILE: package.json
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{
  "name": "glsl-curl-noise",
  "version": "0.0.3",
  "description": "curl noise",
  "main": "curl.glsl",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [
    "curl",
    "noise",
    "glsl"
  ],
  "author": "Isaac Cohen <isaaclandoncohen@gmail.com>",
  "license": "BSD",
  "dependencies": {
    "glsl-noise": "0.0.0"
  }
}