mirror of
https://github.com/Doodle3D/Doodle3D-Slicer.git
synced 2024-11-30 01:14:57 +01:00
379 lines
10 KiB
JavaScript
Executable File
379 lines
10 KiB
JavaScript
Executable File
/**
|
|
* @author zz85 / https://github.com/zz85 | twitter.com/blurspline
|
|
*
|
|
* Depth-of-field shader with bokeh
|
|
* ported from GLSL shader by Martins Upitis
|
|
* http://blenderartists.org/forum/showthread.php?237488-GLSL-depth-of-field-with-bokeh-v2-4-(update)
|
|
*
|
|
* Requires #define RINGS and SAMPLES integers
|
|
*/
|
|
|
|
|
|
|
|
THREE.BokehShader = {
|
|
|
|
uniforms: {
|
|
|
|
"textureWidth": { type: "f", value: 1.0 },
|
|
"textureHeight": { type: "f", value: 1.0 },
|
|
|
|
"focalDepth": { type: "f", value: 1.0 },
|
|
"focalLength": { type: "f", value: 24.0 },
|
|
"fstop": { type: "f", value: 0.9 },
|
|
|
|
"tColor": { type: "t", value: null },
|
|
"tDepth": { type: "t", value: null },
|
|
|
|
"maxblur": { type: "f", value: 1.0 },
|
|
|
|
"showFocus": { type: "i", value: 0 },
|
|
"manualdof": { type: "i", value: 0 },
|
|
"vignetting": { type: "i", value: 0 },
|
|
"depthblur": { type: "i", value: 0 },
|
|
|
|
"threshold": { type: "f", value: 0.5 },
|
|
"gain": { type: "f", value: 2.0 },
|
|
"bias": { type: "f", value: 0.5 },
|
|
"fringe": { type: "f", value: 0.7 },
|
|
|
|
"znear": { type: "f", value: 0.1 },
|
|
"zfar": { type: "f", value: 100 },
|
|
|
|
"noise": { type: "i", value: 1 },
|
|
"dithering": { type: "f", value: 0.0001 },
|
|
"pentagon": { type: "i", value: 0 },
|
|
|
|
"shaderFocus": { type: "i", value: 1 },
|
|
"focusCoords": { type: "v2", value: new THREE.Vector2() },
|
|
|
|
|
|
},
|
|
|
|
vertexShader: [
|
|
|
|
"varying vec2 vUv;",
|
|
|
|
"void main() {",
|
|
|
|
"vUv = uv;",
|
|
"gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );",
|
|
|
|
"}"
|
|
|
|
].join("\n"),
|
|
|
|
fragmentShader: [
|
|
|
|
"varying vec2 vUv;",
|
|
|
|
"uniform sampler2D tColor;",
|
|
"uniform sampler2D tDepth;",
|
|
"uniform float textureWidth;",
|
|
"uniform float textureHeight;",
|
|
|
|
"const float PI = 3.14159265;",
|
|
|
|
"float width = textureWidth; //texture width",
|
|
"float height = textureHeight; //texture height",
|
|
|
|
"vec2 texel = vec2(1.0/width,1.0/height);",
|
|
|
|
"uniform float focalDepth; //focal distance value in meters, but you may use autofocus option below",
|
|
"uniform float focalLength; //focal length in mm",
|
|
"uniform float fstop; //f-stop value",
|
|
"uniform bool showFocus; //show debug focus point and focal range (red = focal point, green = focal range)",
|
|
|
|
"/*",
|
|
"make sure that these two values are the same for your camera, otherwise distances will be wrong.",
|
|
"*/",
|
|
|
|
"uniform float znear; // camera clipping start",
|
|
"uniform float zfar; // camera clipping end",
|
|
|
|
"//------------------------------------------",
|
|
"//user variables",
|
|
|
|
"const int samples = SAMPLES; //samples on the first ring",
|
|
"const int rings = RINGS; //ring count",
|
|
|
|
"const int maxringsamples = rings * samples;",
|
|
|
|
"uniform bool manualdof; // manual dof calculation",
|
|
"float ndofstart = 1.0; // near dof blur start",
|
|
"float ndofdist = 2.0; // near dof blur falloff distance",
|
|
"float fdofstart = 1.0; // far dof blur start",
|
|
"float fdofdist = 3.0; // far dof blur falloff distance",
|
|
|
|
"float CoC = 0.03; //circle of confusion size in mm (35mm film = 0.03mm)",
|
|
|
|
"uniform bool vignetting; // use optical lens vignetting",
|
|
|
|
"float vignout = 1.3; // vignetting outer border",
|
|
"float vignin = 0.0; // vignetting inner border",
|
|
"float vignfade = 22.0; // f-stops till vignete fades",
|
|
|
|
"uniform bool shaderFocus;",
|
|
|
|
"bool autofocus = shaderFocus;",
|
|
"//use autofocus in shader - use with focusCoords",
|
|
"// disable if you use external focalDepth value",
|
|
|
|
"uniform vec2 focusCoords;",
|
|
"// autofocus point on screen (0.0,0.0 - left lower corner, 1.0,1.0 - upper right)",
|
|
"// if center of screen use vec2(0.5, 0.5);",
|
|
|
|
"uniform float maxblur;",
|
|
"//clamp value of max blur (0.0 = no blur, 1.0 default)",
|
|
|
|
"uniform float threshold; // highlight threshold;",
|
|
"uniform float gain; // highlight gain;",
|
|
|
|
"uniform float bias; // bokeh edge bias",
|
|
"uniform float fringe; // bokeh chromatic aberration / fringing",
|
|
|
|
"uniform bool noise; //use noise instead of pattern for sample dithering",
|
|
|
|
"uniform float dithering;",
|
|
"float namount = dithering; //dither amount",
|
|
|
|
"uniform bool depthblur; // blur the depth buffer",
|
|
"float dbsize = 1.25; // depth blur size",
|
|
|
|
"/*",
|
|
"next part is experimental",
|
|
"not looking good with small sample and ring count",
|
|
"looks okay starting from samples = 4, rings = 4",
|
|
"*/",
|
|
|
|
"uniform bool pentagon; //use pentagon as bokeh shape?",
|
|
"float feather = 0.4; //pentagon shape feather",
|
|
|
|
"//------------------------------------------",
|
|
|
|
"float penta(vec2 coords) {",
|
|
"//pentagonal shape",
|
|
"float scale = float(rings) - 1.3;",
|
|
"vec4 HS0 = vec4( 1.0, 0.0, 0.0, 1.0);",
|
|
"vec4 HS1 = vec4( 0.309016994, 0.951056516, 0.0, 1.0);",
|
|
"vec4 HS2 = vec4(-0.809016994, 0.587785252, 0.0, 1.0);",
|
|
"vec4 HS3 = vec4(-0.809016994,-0.587785252, 0.0, 1.0);",
|
|
"vec4 HS4 = vec4( 0.309016994,-0.951056516, 0.0, 1.0);",
|
|
"vec4 HS5 = vec4( 0.0 ,0.0 , 1.0, 1.0);",
|
|
|
|
"vec4 one = vec4( 1.0 );",
|
|
|
|
"vec4 P = vec4((coords),vec2(scale, scale));",
|
|
|
|
"vec4 dist = vec4(0.0);",
|
|
"float inorout = -4.0;",
|
|
|
|
"dist.x = dot( P, HS0 );",
|
|
"dist.y = dot( P, HS1 );",
|
|
"dist.z = dot( P, HS2 );",
|
|
"dist.w = dot( P, HS3 );",
|
|
|
|
"dist = smoothstep( -feather, feather, dist );",
|
|
|
|
"inorout += dot( dist, one );",
|
|
|
|
"dist.x = dot( P, HS4 );",
|
|
"dist.y = HS5.w - abs( P.z );",
|
|
|
|
"dist = smoothstep( -feather, feather, dist );",
|
|
"inorout += dist.x;",
|
|
|
|
"return clamp( inorout, 0.0, 1.0 );",
|
|
"}",
|
|
|
|
"float bdepth(vec2 coords) {",
|
|
"// Depth buffer blur",
|
|
"float d = 0.0;",
|
|
"float kernel[9];",
|
|
"vec2 offset[9];",
|
|
|
|
"vec2 wh = vec2(texel.x, texel.y) * dbsize;",
|
|
|
|
"offset[0] = vec2(-wh.x,-wh.y);",
|
|
"offset[1] = vec2( 0.0, -wh.y);",
|
|
"offset[2] = vec2( wh.x -wh.y);",
|
|
|
|
"offset[3] = vec2(-wh.x, 0.0);",
|
|
"offset[4] = vec2( 0.0, 0.0);",
|
|
"offset[5] = vec2( wh.x, 0.0);",
|
|
|
|
"offset[6] = vec2(-wh.x, wh.y);",
|
|
"offset[7] = vec2( 0.0, wh.y);",
|
|
"offset[8] = vec2( wh.x, wh.y);",
|
|
|
|
"kernel[0] = 1.0/16.0; kernel[1] = 2.0/16.0; kernel[2] = 1.0/16.0;",
|
|
"kernel[3] = 2.0/16.0; kernel[4] = 4.0/16.0; kernel[5] = 2.0/16.0;",
|
|
"kernel[6] = 1.0/16.0; kernel[7] = 2.0/16.0; kernel[8] = 1.0/16.0;",
|
|
|
|
|
|
"for( int i=0; i<9; i++ ) {",
|
|
"float tmp = texture2D(tDepth, coords + offset[i]).r;",
|
|
"d += tmp * kernel[i];",
|
|
"}",
|
|
|
|
"return d;",
|
|
"}",
|
|
|
|
|
|
"vec3 color(vec2 coords,float blur) {",
|
|
"//processing the sample",
|
|
|
|
"vec3 col = vec3(0.0);",
|
|
|
|
"col.r = texture2D(tColor,coords + vec2(0.0,1.0)*texel*fringe*blur).r;",
|
|
"col.g = texture2D(tColor,coords + vec2(-0.866,-0.5)*texel*fringe*blur).g;",
|
|
"col.b = texture2D(tColor,coords + vec2(0.866,-0.5)*texel*fringe*blur).b;",
|
|
|
|
"vec3 lumcoeff = vec3(0.299,0.587,0.114);",
|
|
"float lum = dot(col.rgb, lumcoeff);",
|
|
"float thresh = max((lum-threshold)*gain, 0.0);",
|
|
"return col+mix(vec3(0.0),col,thresh*blur);",
|
|
"}",
|
|
|
|
"vec2 rand(vec2 coord) {",
|
|
"// generating noise / pattern texture for dithering",
|
|
|
|
"float noiseX = ((fract(1.0-coord.s*(width/2.0))*0.25)+(fract(coord.t*(height/2.0))*0.75))*2.0-1.0;",
|
|
"float noiseY = ((fract(1.0-coord.s*(width/2.0))*0.75)+(fract(coord.t*(height/2.0))*0.25))*2.0-1.0;",
|
|
|
|
"if (noise) {",
|
|
"noiseX = clamp(fract(sin(dot(coord ,vec2(12.9898,78.233))) * 43758.5453),0.0,1.0)*2.0-1.0;",
|
|
"noiseY = clamp(fract(sin(dot(coord ,vec2(12.9898,78.233)*2.0)) * 43758.5453),0.0,1.0)*2.0-1.0;",
|
|
"}",
|
|
|
|
"return vec2(noiseX,noiseY);",
|
|
"}",
|
|
|
|
"vec3 debugFocus(vec3 col, float blur, float depth) {",
|
|
"float edge = 0.002*depth; //distance based edge smoothing",
|
|
"float m = clamp(smoothstep(0.0,edge,blur),0.0,1.0);",
|
|
"float e = clamp(smoothstep(1.0-edge,1.0,blur),0.0,1.0);",
|
|
|
|
"col = mix(col,vec3(1.0,0.5,0.0),(1.0-m)*0.6);",
|
|
"col = mix(col,vec3(0.0,0.5,1.0),((1.0-e)-(1.0-m))*0.2);",
|
|
|
|
"return col;",
|
|
"}",
|
|
|
|
"float linearize(float depth) {",
|
|
"return -zfar * znear / (depth * (zfar - znear) - zfar);",
|
|
"}",
|
|
|
|
|
|
"float vignette() {",
|
|
"float dist = distance(vUv.xy, vec2(0.5,0.5));",
|
|
"dist = smoothstep(vignout+(fstop/vignfade), vignin+(fstop/vignfade), dist);",
|
|
"return clamp(dist,0.0,1.0);",
|
|
"}",
|
|
|
|
"float gather(float i, float j, int ringsamples, inout vec3 col, float w, float h, float blur) {",
|
|
"float rings2 = float(rings);",
|
|
"float step = PI*2.0 / float(ringsamples);",
|
|
"float pw = cos(j*step)*i;",
|
|
"float ph = sin(j*step)*i;",
|
|
"float p = 1.0;",
|
|
"if (pentagon) {",
|
|
"p = penta(vec2(pw,ph));",
|
|
"}",
|
|
"col += color(vUv.xy + vec2(pw*w,ph*h), blur) * mix(1.0, i/rings2, bias) * p;",
|
|
"return 1.0 * mix(1.0, i /rings2, bias) * p;",
|
|
"}",
|
|
|
|
"void main() {",
|
|
"//scene depth calculation",
|
|
|
|
"float depth = linearize(texture2D(tDepth,vUv.xy).x);",
|
|
|
|
"// Blur depth?",
|
|
"if (depthblur) {",
|
|
"depth = linearize(bdepth(vUv.xy));",
|
|
"}",
|
|
|
|
"//focal plane calculation",
|
|
|
|
"float fDepth = focalDepth;",
|
|
|
|
"if (autofocus) {",
|
|
|
|
"fDepth = linearize(texture2D(tDepth,focusCoords).x);",
|
|
|
|
"}",
|
|
|
|
"// dof blur factor calculation",
|
|
|
|
"float blur = 0.0;",
|
|
|
|
"if (manualdof) {",
|
|
"float a = depth-fDepth; // Focal plane",
|
|
"float b = (a-fdofstart)/fdofdist; // Far DoF",
|
|
"float c = (-a-ndofstart)/ndofdist; // Near Dof",
|
|
"blur = (a>0.0) ? b : c;",
|
|
"} else {",
|
|
"float f = focalLength; // focal length in mm",
|
|
"float d = fDepth*1000.0; // focal plane in mm",
|
|
"float o = depth*1000.0; // depth in mm",
|
|
|
|
"float a = (o*f)/(o-f);",
|
|
"float b = (d*f)/(d-f);",
|
|
"float c = (d-f)/(d*fstop*CoC);",
|
|
|
|
"blur = abs(a-b)*c;",
|
|
"}",
|
|
|
|
"blur = clamp(blur,0.0,1.0);",
|
|
|
|
"// calculation of pattern for dithering",
|
|
|
|
"vec2 noise = rand(vUv.xy)*namount*blur;",
|
|
|
|
"// getting blur x and y step factor",
|
|
|
|
"float w = (1.0/width)*blur*maxblur+noise.x;",
|
|
"float h = (1.0/height)*blur*maxblur+noise.y;",
|
|
|
|
"// calculation of final color",
|
|
|
|
"vec3 col = vec3(0.0);",
|
|
|
|
"if(blur < 0.05) {",
|
|
"//some optimization thingy",
|
|
"col = texture2D(tColor, vUv.xy).rgb;",
|
|
"} else {",
|
|
"col = texture2D(tColor, vUv.xy).rgb;",
|
|
"float s = 1.0;",
|
|
"int ringsamples;",
|
|
|
|
"for (int i = 1; i <= rings; i++) {",
|
|
"/*unboxstart*/",
|
|
"ringsamples = i * samples;",
|
|
|
|
"for (int j = 0 ; j < maxringsamples ; j++) {",
|
|
"if (j >= ringsamples) break;",
|
|
"s += gather(float(i), float(j), ringsamples, col, w, h, blur);",
|
|
"}",
|
|
"/*unboxend*/",
|
|
"}",
|
|
|
|
"col /= s; //divide by sample count",
|
|
"}",
|
|
|
|
"if (showFocus) {",
|
|
"col = debugFocus(col, blur, depth);",
|
|
"}",
|
|
|
|
"if (vignetting) {",
|
|
"col *= vignette();",
|
|
"}",
|
|
|
|
"gl_FragColor.rgb = col;",
|
|
"gl_FragColor.a = 1.0;",
|
|
"} "
|
|
|
|
].join("\n")
|
|
|
|
};
|