three
Version:
JavaScript 3D library
56 lines (37 loc) • 1.35 kB
JavaScript
console.warn( "THREE.RGBShiftShader: As part of the transition to ES6 Modules, the files in 'examples/js' were deprecated in May 2020 (r117) and will be deleted in December 2020 (r124). You can find more information about developing using ES6 Modules in https://threejs.org/docs/#manual/en/introduction/Installation." );
/**
* 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
*/
THREE.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" )
};