three-stdlib/shaders/LuminosityShader.js

stand-alone library of threejs examples

const LuminosityShader = {
  uniforms: {
    tDiffuse: { value: null }
  },
  vertexShader: [
    "varying vec2 vUv;",
    "void main() {",
    "	vUv = uv;",
    "	gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );",
    "}"
  ].join("\n"),
  fragmentShader: [
    "#include <common>",
    "uniform sampler2D tDiffuse;",
    "varying vec2 vUv;",
    "void main() {",
    "	vec4 texel = texture2D( tDiffuse, vUv );",
    "	float l = linearToRelativeLuminance( texel.rgb );",
    "	gl_FragColor = vec4( l, l, l, texel.w );",
    "}"
  ].join("\n")
};
export {
  LuminosityShader
};
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