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https://github.com/DanielnetoDotCom/YouPHPTube
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54 lines
1 KiB
JavaScript
54 lines
1 KiB
JavaScript
/**
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* RGB Shift Shader
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* Shifts red and blue channels from center in opposite directions
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* Ported from http://kriss.cx/tom/2009/05/rgb-shift/
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* by Tom Butterworth / http://kriss.cx/tom/
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*
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* amount: shift distance (1 is width of input)
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* angle: shift angle in radians
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*/
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THREE.RGBShiftShader = {
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uniforms: {
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'tDiffuse': { value: null },
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'amount': { value: 0.005 },
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'angle': { 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 float amount;',
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'uniform float angle;',
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'varying vec2 vUv;',
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'void main() {',
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' vec2 offset = amount * vec2( cos(angle), sin(angle));',
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' vec4 cr = texture2D(tDiffuse, vUv + offset);',
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' vec4 cga = texture2D(tDiffuse, vUv);',
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' vec4 cb = texture2D(tDiffuse, vUv - offset);',
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' gl_FragColor = vec4(cr.r, cga.g, cb.b, cga.a);',
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'}'
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].join( '\n' )
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};
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