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

58 lines
998 B
JavaScript
Executable File

/**
* @author alteredq / http://alteredqualia.com/
*
* Unpack RGBA depth shader
* - show RGBA encoded depth as monochrome color
*/
THREE.UnpackDepthRGBAShader = {
uniforms: {
"tDiffuse": { type: "t", value: null },
"opacity": { type: "f", value: 1.0 }
},
vertexShader: [
"varying vec2 vUv;",
"void main() {",
"vUv = uv;",
"gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );",
"}"
].join("\n"),
fragmentShader: [
"uniform float opacity;",
"uniform sampler2D tDiffuse;",
"varying vec2 vUv;",
// RGBA depth
"float unpackDepth( const in vec4 rgba_depth ) {",
"const vec4 bit_shift = vec4( 1.0 / ( 256.0 * 256.0 * 256.0 ), 1.0 / ( 256.0 * 256.0 ), 1.0 / 256.0, 1.0 );",
"float depth = dot( rgba_depth, bit_shift );",
"return depth;",
"}",
"void main() {",
"float depth = 1.0 - unpackDepth( texture2D( tDiffuse, vUv ) );",
"gl_FragColor = opacity * vec4( vec3( depth ), 1.0 );",
"}"
].join("\n")
};