Doodle3D-Slicer/three.js-master/examples/js/shaders/LuminosityShader.js
2015-06-12 15:58:26 +02:00

51 lines
697 B
JavaScript
Executable File

/**
* @author alteredq / http://alteredqualia.com/
*
* Luminosity
* http://en.wikipedia.org/wiki/Luminosity
*/
THREE.LuminosityShader = {
uniforms: {
"tDiffuse": { type: "t", value: null }
},
vertexShader: [
"varying vec2 vUv;",
"void main() {",
"vUv = uv;",
"gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );",
"}"
].join("\n"),
fragmentShader: [
"uniform sampler2D tDiffuse;",
"varying vec2 vUv;",
"void main() {",
"vec4 texel = texture2D( tDiffuse, vUv );",
"vec3 luma = vec3( 0.299, 0.587, 0.114 );",
"float v = dot( texel.xyz, luma );",
"gl_FragColor = vec4( v, v, v, texel.w );",
"}"
].join("\n")
};