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- /**
- * RGB Shift Shader
- * Shifts red and blue channels from center in opposite directions
- * Ported from http://kriss.cx/tom/2009/05/rgb-shift/
- * by Tom Butterworth / http://kriss.cx/tom/
- *
- * amount: shift distance (1 is width of input)
- * angle: shift angle in radians
- */
- var RGBShiftShader = {
- uniforms: {
- 'tDiffuse': { value: null },
- 'amount': { value: 0.005 },
- 'angle': { value: 0.0 }
- },
- vertexShader: [
- 'varying vec2 vUv;',
- 'void main() {',
- ' vUv = uv;',
- ' gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );',
- '}'
- ].join( '\n' ),
- fragmentShader: [
- 'uniform sampler2D tDiffuse;',
- 'uniform float amount;',
- 'uniform float angle;',
- 'varying vec2 vUv;',
- 'void main() {',
- ' vec2 offset = amount * vec2( cos(angle), sin(angle));',
- ' vec4 cr = texture2D(tDiffuse, vUv + offset);',
- ' vec4 cga = texture2D(tDiffuse, vUv);',
- ' vec4 cb = texture2D(tDiffuse, vUv - offset);',
- ' gl_FragColor = vec4(cr.r, cga.g, cb.b, cga.a);',
- '}'
- ].join( '\n' )
- };
- export { RGBShiftShader };
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