mirror of
https://github.com/Doodle3D/Doodle3D-Slicer.git
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63 lines
1.6 KiB
JavaScript
63 lines
1.6 KiB
JavaScript
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/**
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* @author zz85 / http://www.lab4games.net/zz85/blog
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*
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* Two pass Gaussian blur filter (horizontal and vertical blur shaders)
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* - described in http://www.gamerendering.com/2008/10/11/gaussian-blur-filter-shader/
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* and used in http://www.cake23.de/traveling-wavefronts-lit-up.html
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*
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* - 9 samples per pass
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* - standard deviation 2.7
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* - "h" and "v" parameters should be set to "1 / width" and "1 / height"
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*/
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THREE.VerticalBlurShader = {
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uniforms: {
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"tDiffuse": { type: "t", value: null },
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"v": { type: "f", value: 1.0 / 512.0 }
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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 v;",
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"varying vec2 vUv;",
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"void main() {",
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"vec4 sum = vec4( 0.0 );",
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"sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y - 4.0 * v ) ) * 0.051;",
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"sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y - 3.0 * v ) ) * 0.0918;",
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"sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y - 2.0 * v ) ) * 0.12245;",
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"sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y - 1.0 * v ) ) * 0.1531;",
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"sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y ) ) * 0.1633;",
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"sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y + 1.0 * v ) ) * 0.1531;",
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"sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y + 2.0 * v ) ) * 0.12245;",
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"sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y + 3.0 * v ) ) * 0.0918;",
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"sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y + 4.0 * v ) ) * 0.051;",
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"gl_FragColor = sum;",
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"}"
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].join("\n")
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};
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