You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
55 lines
1.1 KiB
55 lines
1.1 KiB
/**
|
|
* RGB Shift Shader
|
|
* Shifts red and blue channels from center in opposite directions
|
|
* Ported from https://web.archive.org/web/20090820185047/http://kriss.cx/tom/2009/05/rgb-shift/
|
|
* by Tom Butterworth / https://web.archive.org/web/20090810054752/http://kriss.cx/tom/
|
|
*
|
|
* amount: shift distance (1 is width of input)
|
|
* angle: shift angle in radians
|
|
*/
|
|
|
|
const RGBShiftShader = {
|
|
|
|
name: 'RGBShiftShader',
|
|
|
|
uniforms: {
|
|
|
|
'tDiffuse': { value: null },
|
|
'amount': { value: 0.005 },
|
|
'angle': { value: 0.0 }
|
|
|
|
},
|
|
|
|
vertexShader: /* glsl */`
|
|
|
|
varying vec2 vUv;
|
|
|
|
void main() {
|
|
|
|
vUv = uv;
|
|
gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
|
|
|
|
}`,
|
|
|
|
fragmentShader: /* glsl */`
|
|
|
|
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);
|
|
|
|
}`
|
|
|
|
};
|
|
|
|
export { RGBShiftShader };
|