mirror of
https://github.com/Doodle3D/Doodle3D-Slicer.git
synced 2024-07-08 19:50:43 +02:00
105 lines
2.5 KiB
JavaScript
Executable File
105 lines
2.5 KiB
JavaScript
Executable File
/**
|
|
* @author alteredq / http://alteredqualia.com/
|
|
*
|
|
* Film grain & scanlines shader
|
|
*
|
|
* - ported from HLSL to WebGL / GLSL
|
|
* http://www.truevision3d.com/forums/showcase/staticnoise_colorblackwhite_scanline_shaders-t18698.0.html
|
|
*
|
|
* Screen Space Static Postprocessor
|
|
*
|
|
* Produces an analogue noise overlay similar to a film grain / TV static
|
|
*
|
|
* Original implementation and noise algorithm
|
|
* Pat 'Hawthorne' Shearon
|
|
*
|
|
* Optimized scanlines + noise version with intensity scaling
|
|
* Georg 'Leviathan' Steinrohder
|
|
*
|
|
* This version is provided under a Creative Commons Attribution 3.0 License
|
|
* http://creativecommons.org/licenses/by/3.0/
|
|
*/
|
|
|
|
THREE.FilmShader = {
|
|
|
|
uniforms: {
|
|
|
|
"tDiffuse": { type: "t", value: null },
|
|
"time": { type: "f", value: 0.0 },
|
|
"nIntensity": { type: "f", value: 0.5 },
|
|
"sIntensity": { type: "f", value: 0.05 },
|
|
"sCount": { type: "f", value: 4096 },
|
|
"grayscale": { type: "i", value: 1 }
|
|
|
|
},
|
|
|
|
vertexShader: [
|
|
|
|
"varying vec2 vUv;",
|
|
|
|
"void main() {",
|
|
|
|
"vUv = uv;",
|
|
"gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );",
|
|
|
|
"}"
|
|
|
|
].join("\n"),
|
|
|
|
fragmentShader: [
|
|
|
|
// control parameter
|
|
"uniform float time;",
|
|
|
|
"uniform bool grayscale;",
|
|
|
|
// noise effect intensity value (0 = no effect, 1 = full effect)
|
|
"uniform float nIntensity;",
|
|
|
|
// scanlines effect intensity value (0 = no effect, 1 = full effect)
|
|
"uniform float sIntensity;",
|
|
|
|
// scanlines effect count value (0 = no effect, 4096 = full effect)
|
|
"uniform float sCount;",
|
|
|
|
"uniform sampler2D tDiffuse;",
|
|
|
|
"varying vec2 vUv;",
|
|
|
|
"void main() {",
|
|
|
|
// sample the source
|
|
"vec4 cTextureScreen = texture2D( tDiffuse, vUv );",
|
|
|
|
// make some noise
|
|
"float x = vUv.x * vUv.y * time * 1000.0;",
|
|
"x = mod( x, 13.0 ) * mod( x, 123.0 );",
|
|
"float dx = mod( x, 0.01 );",
|
|
|
|
// add noise
|
|
"vec3 cResult = cTextureScreen.rgb + cTextureScreen.rgb * clamp( 0.1 + dx * 100.0, 0.0, 1.0 );",
|
|
|
|
// get us a sine and cosine
|
|
"vec2 sc = vec2( sin( vUv.y * sCount ), cos( vUv.y * sCount ) );",
|
|
|
|
// add scanlines
|
|
"cResult += cTextureScreen.rgb * vec3( sc.x, sc.y, sc.x ) * sIntensity;",
|
|
|
|
// interpolate between source and result by intensity
|
|
"cResult = cTextureScreen.rgb + clamp( nIntensity, 0.0,1.0 ) * ( cResult - cTextureScreen.rgb );",
|
|
|
|
// convert to grayscale if desired
|
|
"if( grayscale ) {",
|
|
|
|
"cResult = vec3( cResult.r * 0.3 + cResult.g * 0.59 + cResult.b * 0.11 );",
|
|
|
|
"}",
|
|
|
|
"gl_FragColor = vec4( cResult, cTextureScreen.a );",
|
|
|
|
"}"
|
|
|
|
].join("\n")
|
|
|
|
};
|