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.
60 lines
1.4 KiB
60 lines
1.4 KiB
6 months ago
|
/**
|
||
|
|
* Two pass Gaussian blur filter (horizontal and vertical blur shaders)
|
||
|
|
* - see http://www.cake23.de/traveling-wavefronts-lit-up.html
|
||
|
|
*
|
||
|
|
* - 9 samples per pass
|
||
|
|
* - standard deviation 2.7
|
||
|
|
* - "h" and "v" parameters should be set to "1 / width" and "1 / height"
|
||
|
|
*/
|
||
|
|
|
||
|
|
const HorizontalBlurShader = {
|
||
|
|
|
||
|
|
name: 'HorizontalBlurShader',
|
||
|
|
|
||
|
|
uniforms: {
|
||
|
|
|
||
|
|
'tDiffuse': { value: null },
|
||
|
|
'h': { value: 1.0 / 512.0 }
|
||
|
|
|
||
|
|
},
|
||
|
|
|
||
|
|
vertexShader: /* glsl */`
|
||
|
|
|
||
|
|
varying vec2 vUv;
|
||
|
|
|
||
|
|
void main() {
|
||
|
|
|
||
|
|
vUv = uv;
|
||
|
|
gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
|
||
|
|
|
||
|
|
}`,
|
||
|
|
|
||
|
|
fragmentShader: /* glsl */`
|
||
|
|
|
||
|
|
uniform sampler2D tDiffuse;
|
||
|
|
uniform float h;
|
||
|
|
|
||
|
|
varying vec2 vUv;
|
||
|
|
|
||
|
|
void main() {
|
||
|
|
|
||
|
|
vec4 sum = vec4( 0.0 );
|
||
|
|
|
||
|
|
sum += texture2D( tDiffuse, vec2( vUv.x - 4.0 * h, vUv.y ) ) * 0.051;
|
||
|
|
sum += texture2D( tDiffuse, vec2( vUv.x - 3.0 * h, vUv.y ) ) * 0.0918;
|
||
|
|
sum += texture2D( tDiffuse, vec2( vUv.x - 2.0 * h, vUv.y ) ) * 0.12245;
|
||
|
|
sum += texture2D( tDiffuse, vec2( vUv.x - 1.0 * h, vUv.y ) ) * 0.1531;
|
||
|
|
sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y ) ) * 0.1633;
|
||
|
|
sum += texture2D( tDiffuse, vec2( vUv.x + 1.0 * h, vUv.y ) ) * 0.1531;
|
||
|
|
sum += texture2D( tDiffuse, vec2( vUv.x + 2.0 * h, vUv.y ) ) * 0.12245;
|
||
|
|
sum += texture2D( tDiffuse, vec2( vUv.x + 3.0 * h, vUv.y ) ) * 0.0918;
|
||
|
|
sum += texture2D( tDiffuse, vec2( vUv.x + 4.0 * h, vUv.y ) ) * 0.051;
|
||
|
|
|
||
|
|
gl_FragColor = sum;
|
||
|
|
|
||
|
|
}`
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
export { HorizontalBlurShader };
|