mirror of
https://github.com/DanielnetoDotCom/YouPHPTube
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70 lines
1.2 KiB
JavaScript
70 lines
1.2 KiB
JavaScript
/**
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* Triangle blur shader
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* based on glfx.js triangle blur shader
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* https://github.com/evanw/glfx.js
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*
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* A basic blur filter, which convolves the image with a
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* pyramid filter. The pyramid filter is separable and is applied as two
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* perpendicular triangle filters.
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*/
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THREE.TriangleBlurShader = {
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uniforms: {
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'texture': { value: null },
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'delta': { value: new THREE.Vector2( 1, 1 ) }
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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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'#include <common>',
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'#define ITERATIONS 10.0',
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'uniform sampler2D texture;',
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'uniform vec2 delta;',
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'varying vec2 vUv;',
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'void main() {',
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' vec4 color = vec4( 0.0 );',
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' float total = 0.0;',
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// randomize the lookup values to hide the fixed number of samples
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' float offset = rand( vUv );',
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' for ( float t = -ITERATIONS; t <= ITERATIONS; t ++ ) {',
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' float percent = ( t + offset - 0.5 ) / ITERATIONS;',
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' float weight = 1.0 - abs( percent );',
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' color += texture2D( texture, vUv + delta * percent ) * weight;',
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' total += weight;',
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' }',
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' gl_FragColor = color / total;',
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'}'
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].join( '\n' )
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};
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