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| /** | |
| * @author alteredq / http://alteredqualia.com/ | |
| * | |
| * Focus shader | |
| * based on PaintEffect postprocess from ro.me | |
| * http://code.google.com/p/3-dreams-of-black/source/browse/deploy/js/effects/PaintEffect.js | |
| */ | |
| THREE.FocusShader = { | |
| uniforms : { | |
| "tDiffuse": { value: null }, | |
| "screenWidth": { value: 1024 }, | |
| "screenHeight": { value: 1024 }, | |
| "sampleDistance": { value: 0.94 }, | |
| "waveFactor": { value: 0.00125 } | |
| }, | |
| vertexShader: [ | |
| "varying vec2 vUv;", | |
| "void main() {", | |
| "vUv = uv;", | |
| "gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );", | |
| "}" | |
| ].join( "\n" ), | |
| fragmentShader: [ | |
| "uniform float screenWidth;", | |
| "uniform float screenHeight;", | |
| "uniform float sampleDistance;", | |
| "uniform float waveFactor;", | |
| "uniform sampler2D tDiffuse;", | |
| "varying vec2 vUv;", | |
| "void main() {", | |
| "vec4 color, org, tmp, add;", | |
| "float sample_dist, f;", | |
| "vec2 vin;", | |
| "vec2 uv = vUv;", | |
| "add = color = org = texture2D( tDiffuse, uv );", | |
| "vin = ( uv - vec2( 0.5 ) ) * vec2( 1.4 );", | |
| "sample_dist = dot( vin, vin ) * 2.0;", | |
| "f = ( waveFactor * 100.0 + sample_dist ) * sampleDistance * 4.0;", | |
| "vec2 sampleSize = vec2( 1.0 / screenWidth, 1.0 / screenHeight ) * vec2( f );", | |
| "add += tmp = texture2D( tDiffuse, uv + vec2( 0.111964, 0.993712 ) * sampleSize );", | |
| "if( tmp.b < color.b ) color = tmp;", | |
| "add += tmp = texture2D( tDiffuse, uv + vec2( 0.846724, 0.532032 ) * sampleSize );", | |
| "if( tmp.b < color.b ) color = tmp;", | |
| "add += tmp = texture2D( tDiffuse, uv + vec2( 0.943883, -0.330279 ) * sampleSize );", | |
| "if( tmp.b < color.b ) color = tmp;", | |
| "add += tmp = texture2D( tDiffuse, uv + vec2( 0.330279, -0.943883 ) * sampleSize );", | |
| "if( tmp.b < color.b ) color = tmp;", | |
| "add += tmp = texture2D( tDiffuse, uv + vec2( -0.532032, -0.846724 ) * sampleSize );", | |
| "if( tmp.b < color.b ) color = tmp;", | |
| "add += tmp = texture2D( tDiffuse, uv + vec2( -0.993712, -0.111964 ) * sampleSize );", | |
| "if( tmp.b < color.b ) color = tmp;", | |
| "add += tmp = texture2D( tDiffuse, uv + vec2( -0.707107, 0.707107 ) * sampleSize );", | |
| "if( tmp.b < color.b ) color = tmp;", | |
| "color = color * vec4( 2.0 ) - ( add / vec4( 8.0 ) );", | |
| "color = color + ( add / vec4( 8.0 ) - color ) * ( vec4( 1.0 ) - vec4( sample_dist * 0.5 ) );", | |
| "gl_FragColor = vec4( color.rgb * color.rgb * vec3( 0.95 ) + color.rgb, 1.0 );", | |
| "}" | |
| ].join( "\n" ) | |
| }; | |