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https://github.com/Doodle3D/Doodle3D-Slicer.git
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58 lines
998 B
JavaScript
Executable File
58 lines
998 B
JavaScript
Executable File
/**
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* @author alteredq / http://alteredqualia.com/
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*
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* Unpack RGBA depth shader
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* - show RGBA encoded depth as monochrome color
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*/
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THREE.UnpackDepthRGBAShader = {
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uniforms: {
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"tDiffuse": { type: "t", value: null },
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"opacity": { type: "f", value: 1.0 }
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},
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vertexShader: [
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"varying vec2 vUv;",
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"void main() {",
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"vUv = uv;",
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"gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );",
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"}"
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].join("\n"),
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fragmentShader: [
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"uniform float opacity;",
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"uniform sampler2D tDiffuse;",
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"varying vec2 vUv;",
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// RGBA depth
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"float unpackDepth( const in vec4 rgba_depth ) {",
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"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 );",
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"float depth = dot( rgba_depth, bit_shift );",
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"return depth;",
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"}",
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"void main() {",
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"float depth = 1.0 - unpackDepth( texture2D( tDiffuse, vUv ) );",
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"gl_FragColor = opacity * vec4( vec3( depth ), 1.0 );",
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"}"
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].join("\n")
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};
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