65 lines
1.2 KiB
JavaScript
65 lines
1.2 KiB
JavaScript
/**
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* @author bhouston / http://clara.io/
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*
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* Luminosity
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* http://en.wikipedia.org/wiki/Luminosity
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*/
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THREE.LuminosityHighPassShader = {
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shaderID: "luminosityHighPass",
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uniforms: {
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"tDiffuse": { value: null },
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"luminosityThreshold": { value: 1.0 },
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"smoothWidth": { value: 1.0 },
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"defaultColor": { value: new THREE.Color( 0x000000 ) },
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"defaultOpacity": { value: 0.0 }
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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 sampler2D tDiffuse;",
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"uniform vec3 defaultColor;",
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"uniform float defaultOpacity;",
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"uniform float luminosityThreshold;",
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"uniform float smoothWidth;",
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"varying vec2 vUv;",
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"void main() {",
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" vec4 texel = texture2D( tDiffuse, vUv );",
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" vec3 luma = vec3( 0.299, 0.587, 0.114 );",
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" float v = dot( texel.xyz, luma );",
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" vec4 outputColor = vec4( defaultColor.rgb, defaultOpacity );",
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" float alpha = smoothstep( luminosityThreshold, luminosityThreshold + smoothWidth, v );",
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" gl_FragColor = mix( outputColor, texel, alpha );",
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"}"
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].join( "\n" )
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};
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