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<!doctype html>
<html>
<body>
<button onclick="compileManyShaders(10)">Compile 10</button>
<button onclick="compileManyShaders(50)">Compile 50</button>
<div>
<canvas width = "400" height = "400" id = "my_Canvas"></canvas>
</div>
<script>
var canvas = document.getElementById('my_Canvas');
gl = canvas.getContext('webgl2');
console.log("KHR_parallel_shader_compile supported: ", gl.getExtension('KHR_parallel_shader_compile'));
var vertices = [ -1,-1,-1, 1,-1,-1, 1, 1,-1 ];
var colors = [ 1,1,1, 1,1,1, 1,1,1 ];
var indices = [ 0,1,2 ];
var vertex_buffer = gl.createBuffer ();
gl.bindBuffer(gl.ARRAY_BUFFER, vertex_buffer);
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(vertices), gl.STATIC_DRAW);
var color_buffer = gl.createBuffer ();
gl.bindBuffer(gl.ARRAY_BUFFER, color_buffer);
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(colors), gl.STATIC_DRAW);
var index_buffer = gl.createBuffer ();
gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, index_buffer);
gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new Uint16Array(indices), gl.STATIC_DRAW);
var vertCode = 'attribute vec3 position;'+
'uniform mat4 Pmatrix;'+
'uniform mat4 Vmatrix;'+
'uniform mat4 Mmatrix;'+
'attribute vec3 color;'+
'varying vec3 vColor;'+
'void main(void) { '+
'gl_Position = Pmatrix*Vmatrix*Mmatrix*vec4(position, 1.);'+
'vColor = color;'+
'}';
var fragCode = 'precision mediump float;'+
'varying vec3 vColor;'+
'void main(void) {'+
'gl_FragColor = vec4(vColor, 1.);'+
'}';
var vertShader = gl.createShader(gl.VERTEX_SHADER);
gl.shaderSource(vertShader, vertCode);
gl.compileShader(vertShader);
var fragShader = gl.createShader(gl.FRAGMENT_SHADER);
gl.shaderSource(fragShader, fragCode);
gl.compileShader(fragShader);
var shaderProgram = gl.createProgram();
gl.attachShader(shaderProgram, vertShader);
gl.attachShader(shaderProgram, fragShader);
gl.linkProgram(shaderProgram);
var Pmatrix = gl.getUniformLocation(shaderProgram, "Pmatrix");
var Vmatrix = gl.getUniformLocation(shaderProgram, "Vmatrix");
var Mmatrix = gl.getUniformLocation(shaderProgram, "Mmatrix");
gl.bindBuffer(gl.ARRAY_BUFFER, vertex_buffer);
var position = gl.getAttribLocation(shaderProgram, "position");
gl.vertexAttribPointer(position, 3, gl.FLOAT, false,0,0) ; //position
gl.enableVertexAttribArray(position);
gl.bindBuffer(gl.ARRAY_BUFFER, color_buffer);
var color = gl.getAttribLocation(shaderProgram, "color");
gl.vertexAttribPointer(color, 3, gl.FLOAT, false,0,0) ; //color
gl.enableVertexAttribArray(color);
gl.useProgram(shaderProgram);
function get_projection(angle, a, zMin, zMax) {
var ang = Math.tan((angle*.5)*Math.PI/180);//angle*.5
return [
0.5/ang, 0 , 0, 0,
0, 0.5*a/ang, 0, 0,
0, 0, -(zMax+zMin)/(zMax-zMin), -1,
0, 0, (-2*zMax*zMin)/(zMax-zMin), 0
];
}
var proj_matrix = get_projection(40, canvas.width/canvas.height, 1, 100);
var mov_matrix = [1,0,0,0, 0,1,0,0, 0,0,1,0, 0,0,0,1];
var view_matrix = [1,0,0,0, 0,1,0,0, 0,0,1,0, 0,0,0,1];
view_matrix[14] = view_matrix[14]-6; //zoom
function rotateZ(m, angle) {
var c = Math.cos(angle);
var s = Math.sin(angle);
var mv0 = m[0], mv4 = m[4], mv8 = m[8];
m[0] = c*m[0]-s*m[1];
m[4] = c*m[4]-s*m[5];
m[8] = c*m[8]-s*m[9];
m[1] = c*m[1]+s*mv0;
m[5] = c*m[5]+s*mv4;
m[9] = c*m[9]+s*mv8;
}
/*=================SHADER COMPILATION ===========================*/
let shaders = [];
let waitStartTime;
const appStartTime = Date.now();
function compileManyShaders(count) {
console.time('generate');
// generate source code
for (let i = 0; i < count; i++) {
shaders.push({
vsCode: getVS(),
fsCode: getFS(),
index: i
});
}
console.timeEnd('generate');
console.time('compile');
// compile all
shaders.forEach((shader) => {
shader.vertShader = gl.createShader(gl.VERTEX_SHADER);
gl.shaderSource(shader.vertShader, shader.vsCode);
gl.compileShader(shader.vertShader);
shader.fragShader = gl.createShader(gl.FRAGMENT_SHADER);
gl.shaderSource(shader.fragShader, shader.fsCode);
gl.compileShader(shader.fragShader);
});
console.timeEnd('compile');
console.time('link');
// link all
shaders.forEach((shader) => {
shader.program = gl.createProgram();
gl.attachShader(shader.program, shader.vertShader);
gl.attachShader(shader.program, shader.fragShader);
gl.linkProgram(shader.program);
});
console.timeEnd('link');
waitStartTime = Date.now();
}
function waitManyShaders() {
const ext = gl.getExtension('KHR_parallel_shader_compile');
shaders = shaders.filter((shader) => {
let done = true; // without extension assume done
if (ext) {
console.time("COMPLETION_STATUS");
done = gl.getProgramParameter(shader.program, ext.COMPLETION_STATUS_KHR);
console.timeEnd("COMPLETION_STATUS");
if (!done) {
return true; // try next frame
}
}
if (done) {
console.time("LINK_STATUS");
gl.getProgramParameter(shader.program, gl.LINK_STATUS);
console.timeEnd("LINK_STATUS");
}
return !done;
});
console.log('left to finish', shaders.length);
if (!shaders.length) {
console.log('TOTAL WAIT TIME:', Date.now() - waitStartTime, 'ms');
}
}
/*============================================*/
var time_old = 0;
var animate = function(time) {
var dt = time-time_old;
rotateZ(mov_matrix, dt*0.002);
time_old = time;
/*============================================*/
// wait till all shaders are done compiling
if (shaders.length) {
console.log('-------- DT: ', dt, 'ms');
waitManyShaders();
}
/*============================================*/
// render the triangle
gl.enable(gl.DEPTH_TEST);
gl.depthFunc(gl.LEQUAL);
gl.clearColor(0.5, 0.5, 0.5, 0.9);
gl.clearDepth(1.0);
gl.viewport(0.0, 0.0, canvas.width, canvas.height);
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
gl.uniformMatrix4fv(Pmatrix, false, proj_matrix);
gl.uniformMatrix4fv(Vmatrix, false, view_matrix);
gl.uniformMatrix4fv(Mmatrix, false, mov_matrix);
gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, index_buffer);
gl.drawElements(gl.TRIANGLES, indices.length, gl.UNSIGNED_SHORT, 0);
window.requestAnimationFrame(animate);
}
function getVS() {
return `#version 300 es
#define attribute in
#define varying out
#define texture2D texture
#define GL2
#define VERTEXSHADER
#define SHADER_NAME LitShader
varying vec2 vUV0_1;
varying vec3 vPositionW;
varying vec3 vNormalW;
attribute vec3 vertex_position;
attribute vec3 vertex_normal;
attribute vec4 vertex_tangent;
attribute vec2 vertex_texCoord0;
attribute vec2 vertex_texCoord1;
attribute vec4 vertex_color;
uniform mat4 matrix_viewProjection;
uniform mat4 matrix_model;
uniform mat3 matrix_normal;
vec3 dPositionW;
mat4 dModelMatrix;
mat3 dNormalMatrix;
vec2 getUv0() {
return vertex_texCoord0;
}
uniform vec3 texture_diffuseMapTransform0;
uniform vec3 texture_diffuseMapTransform1;
mat4 getModelMatrix() {
return matrix_model;
}
vec4 getPosition() {
dModelMatrix = getModelMatrix();
vec3 localPos = vertex_position;
vec4 posW = dModelMatrix * vec4(localPos, 1.0);
dPositionW = posW.xyz;
vec4 screenPos;
screenPos = matrix_viewProjection * posW;
return screenPos;
}
vec3 getWorldPosition() {
return dPositionW;
}
vec3 getNormal() {
dNormalMatrix = matrix_normal;
vec3 tempNormal = vertex_normal;
return normalize(dNormalMatrix * tempNormal);
}
void main(void) {
gl_Position = getPosition();
vPositionW = getWorldPosition();
vNormalW = getNormal();
vec2 uv0 = getUv0();
vUV0_1 = vec2(dot(vec3(uv0, 1), texture_diffuseMapTransform0), dot(vec3(uv0, 1), texture_diffuseMapTransform1));
}
`;
}
function getFS() {
return `#version 300 es
precision highp float;
precision highp sampler2DShadow;
#define varying in
out highp vec4 pc_fragColor;
#define gl_FragColor pc_fragColor
#define texture2D texture
#define texture2DBias texture
#define textureCube texture
#define texture2DProj textureProj
#define texture2DLodEXT textureLod
#define texture2DProjLodEXT textureProjLod
#define textureCubeLodEXT textureLod
#define texture2DGradEXT textureGrad
#define texture2DProjGradEXT textureProjGrad
#define textureCubeGradEXT textureGrad
#define textureShadow(res, uv) textureGrad(res, uv, vec2(1, 1), vec2(1, 1))
#define SHADOWMAP_PASS(name) name
#define SHADOWMAP_ACCEPT(name) sampler2DShadow name
#define TEXTURE_PASS(name) name
#define TEXTURE_ACCEPT(name) sampler2D name
#define GL2
#define SUPPORTS_TEXLOD
vec2 getGrabScreenPos(vec4 clipPos) {
vec2 uv = (clipPos.xy / clipPos.w) * 0.5 + 0.5;
return uv;
}
vec2 getImageEffectUV(vec2 uv) {
return uv;
}
#define SHADER_NAME LitShader
#define LIT_SPECULAR
#define LIT_REFLECTIONS
#define LIT_SPECULAR_FRESNEL
#define LIT_CONSERVE_ENERGY
varying vec2 vUV0_1;
varying vec3 vPositionW;
varying vec3 vNormalW;
uniform vec3 view_position;
uniform vec3 light_globalAmbient;
float square(float x) {
return x*x;
}
float saturate(float x) {
return clamp(x, 0.0, 1.0);
}
vec3 saturate(vec3 x) {
return clamp(x, vec3(0.0), vec3(1.0));
}
vec3 detailMode_mul(vec3 c1, vec3 c2) {
return c1 * c2;
}
vec3 detailMode_add(vec3 c1, vec3 c2) {
return c1 + c2;
}
vec3 detailMode_screen(vec3 c1, vec3 c2) {
return 1.0 - (1.0 - c1)*(1.0 - c2);
}
vec3 detailMode_overlay(vec3 c1, vec3 c2) {
return mix(1.0 - 2.0*(1.0 - c1)*(1.0 - c2), 2.0*c1*c2, step(c1, vec3(0.5)));
}
vec3 detailMode_min(vec3 c1, vec3 c2) {
return min(c1, c2);
}
vec3 detailMode_max(vec3 c1, vec3 c2) {
return max(c1, c2);
}
vec4 dReflection;
mat3 dTBN;
vec3 dVertexNormalW;
vec3 dViewDirW;
vec3 dReflDirW;
vec3 dDiffuseLight;
vec3 dSpecularLight;
vec3 dLightDirNormW;
vec3 dLightDirW;
vec3 dLightPosW;
vec3 dShadowCoord;
float dAtten;
float dAttenD;
vec3 dAtten3;
float ccFresnel;
vec3 ccReflection;
vec3 ccSpecularLight;
vec3 sSpecularLight;
vec3 sReflection;
uniform float textureBias;
float dAlpha = 1.0;
vec3 dNormalW;
vec3 dAlbedo;
vec3 dSpecularity;
float dGlossiness;
float dMetalness;
vec3 dEmission;
uniform sampler2D texture_normalMap;
uniform sampler2D texture_diffuseMap;
uniform sampler2D texture_glossMap;
float getSpotEffect(vec3 lightSpotDirW, float lightInnerConeAngle, float lightOuterConeAngle) {
float cosAngle = dot(dLightDirNormW, lightSpotDirW);
return smoothstep(lightOuterConeAngle, lightInnerConeAngle, cosAngle);
}
float getFalloffWindow(float lightRadius) {
float sqrDist = dot(dLightDirW, dLightDirW);
float invRadius = 1.0 / lightRadius;
return square( saturate( 1.0 - square( sqrDist * square(invRadius) ) ) );
}
float getFalloffInvSquared(float lightRadius) {
float sqrDist = dot(dLightDirW, dLightDirW);
float falloff = 1.0 / (sqrDist + 1.0);
float invRadius = 1.0 / lightRadius;
falloff *= 16.0;
falloff *= square( saturate( 1.0 - square( sqrDist * square(invRadius) ) ) );
return falloff;
}
float getFalloffLinear(float lightRadius) {
float d = length(dLightDirW);
return max(((lightRadius - d) / lightRadius), 0.0);
}
void getLightDirPoint(vec3 lightPosW) {
dLightDirW = vPositionW - lightPosW;
dLightDirNormW = normalize(dLightDirW);
dLightPosW = lightPosW;
}
#define AREA_LIGHTS
uniform highp sampler2D areaLightsLutTex1;
uniform highp sampler2D areaLightsLutTex2;
uniform float tbnBasis;
void getTBN() {
vec2 uv = vUV0_1;
vec3 dp1 = dFdx( vPositionW );
vec3 dp2 = dFdy( vPositionW );
vec2 duv1 = dFdx( uv );
vec2 duv2 = dFdy( uv );
vec3 dp2perp = cross( dp2, dVertexNormalW );
vec3 dp1perp = cross( dVertexNormalW, dp1 );
vec3 T = dp2perp * duv1.x + dp1perp * duv2.x;
vec3 B = dp2perp * duv1.y + dp1perp * duv2.y;
float denom = max( dot(T, T), dot(B, B) );
float invmax = (denom == 0.0) ? 0.0 : tbnBasis / sqrt( denom );
dTBN = mat3(T * invmax, -B * invmax, dVertexNormalW );
}
const float PI = 3.141592653589793;
vec2 toSpherical(vec3 dir) {
return vec2(dir.xz == vec2(0.0) ? 0.0 : atan(dir.x, dir.z), asin(dir.y));
}
vec2 toSphericalUv(vec3 dir) {
vec2 uv = toSpherical(dir) / vec2(PI * 2.0, PI) + 0.5;
return vec2(uv.x, 1.0 - uv.y);
}
vec3 decodeLinear(vec4 raw) {
return raw.rgb;
}
float decodeGamma(float raw) {
return pow(raw, 2.2);
}
vec3 decodeGamma(vec3 raw) {
return pow(raw, vec3(2.2));
}
vec3 decodeGamma(vec4 raw) {
return pow(raw.xyz, vec3(2.2));
}
vec3 decodeRGBM(vec4 raw) {
vec3 color = (8.0 * raw.a) * raw.rgb;
return color * color;
}
vec3 decodeRGBP(vec4 raw) {
vec3 color = raw.rgb * (-raw.a * 7.0 + 8.0);
return color * color;
}
vec3 decodeRGBE(vec4 raw) {
if (raw.a == 0.0) {
return vec3(0.0, 0.0, 0.0);
}
else {
return raw.xyz * pow(2.0, raw.w * 255.0 - 128.0);
}
}
vec4 passThrough(vec4 raw) {
return raw;
}
float gammaCorrectInput(float color) {
return decodeGamma(color);
}
vec3 gammaCorrectInput(vec3 color) {
return decodeGamma(color);
}
vec4 gammaCorrectInput(vec4 color) {
return vec4(decodeGamma(color.xyz), color.w);
}
vec3 gammaCorrectOutput(vec3 color) {
return pow(color + 0.0000001, vec3(1.0 / 2.2));
}
uniform float exposure;
vec3 toneMap(vec3 color) {
float tA = 2.51;
float tB = 0.03;
float tC = 2.43;
float tD = 0.59;
float tE = 0.14;
vec3 x = color * exposure;
return (x*(tA*x+tB))/(x*(tC*x+tD)+tE);
}
float dBlendModeFogFactor = 1.0;
vec3 addFog(vec3 color) {
return color;
}
vec3 unpackNormal(vec4 nmap) {
return nmap.xyz * 2.0 - 1.0;
}
#undef MAPFLOAT
#undef MAPCOLOR
#undef MAPVERTEX
#undef MAPTEXTURE
#undef MAPINVERT
vec3 addNormalDetail(vec3 normalMap) {
return normalMap;
}
#undef MAPFLOAT
#undef MAPCOLOR
#undef MAPVERTEX
#define MAPTEXTURE
#undef MAPINVERT
uniform float material_bumpiness;
void getNormal() {
vec3 normalMap = unpackNormal(texture2DBias(texture_normalMap, vUV0_1, textureBias));
normalMap = mix(vec3(0.0, 0.0, 1.0), normalMap, material_bumpiness);
dNormalW = normalize(dTBN * addNormalDetail(normalMap));
}
#undef MAPFLOAT
#undef MAPCOLOR
#undef MAPVERTEX
#undef MAPTEXTURE
#undef MAPINVERT
vec3 addAlbedoDetail(vec3 albedo) {
return albedo;
}
#undef MAPFLOAT
#undef MAPCOLOR
#undef MAPVERTEX
#define MAPTEXTURE
#undef MAPINVERT
void getAlbedo() {
dAlbedo = vec3(1.0);
vec3 albedoBase = decodeGamma(texture2DBias(texture_diffuseMap, vUV0_1, textureBias)).rgb;
dAlbedo *= addAlbedoDetail(albedoBase);
}
#define MAPFLOAT
#undef MAPCOLOR
#undef MAPVERTEX
#undef MAPTEXTURE
#undef MAPINVERT
uniform float material_metalness;
void getMetalness() {
float metalness = 1.0;
metalness *= material_metalness;
dMetalness = metalness;
}
void getSpecularity() {
dSpecularity = vec3(1);
}
#define MAPFLOAT
#undef MAPCOLOR
#undef MAPVERTEX
#define MAPTEXTURE
#undef MAPINVERT
uniform float material_gloss;
void getGlossiness() {
dGlossiness = 1.0;
dGlossiness *= material_gloss;
dGlossiness *= texture2DBias(texture_glossMap, vUV0_1, textureBias).g;
dGlossiness += 0.0000001;
}
#undef MAPFLOAT
#define MAPCOLOR
#undef MAPVERTEX
#undef MAPTEXTURE
#undef MAPINVERT
uniform vec3 material_emissive;
void getEmission() {
dEmission = vec3(1.0);
dEmission *= material_emissive;
}
vec3 cubeMapRotate(vec3 refDir) {
return refDir;
}
vec3 cubeMapProject(vec3 dir) {
return cubeMapRotate(dir);
}
uniform float skyboxIntensity;
vec3 processEnvironment(vec3 color) {
return color * skyboxIntensity;
}
uniform float material_f0;
void getMetalnessModulate() {
vec3 dielectricF0 = material_f0 * dSpecularity;
dSpecularity = mix(dielectricF0, dAlbedo, dMetalness);
dAlbedo *= 1.0 - dMetalness;
}
vec3 getFresnel(float cosTheta, vec3 f0) {
float fresnel = pow(1.0 - max(cosTheta, 0.0), 5.0);
float glossSq = dGlossiness * dGlossiness;
vec3 ret = f0 + (max(vec3(glossSq), f0) - f0) * fresnel;
return ret;
}
float getFresnelCC(float cosTheta) {
float fresnel = pow(1.0 - max(cosTheta, 0.0), 5.0);
return 0.04 + (1.0 - 0.04) * fresnel;
}
const float atlasSize = 512.0;
const float seamSize = 1.0 / atlasSize;
vec2 mapUv(vec2 uv, vec4 rect) {
return vec2(mix(rect.x + seamSize, rect.x + rect.z - seamSize, uv.x), mix(rect.y + seamSize, rect.y + rect.w - seamSize, uv.y));
}
vec2 mapRoughnessUv(vec2 uv, float level) {
float t = 1.0 / exp2(level);
return mapUv(uv, vec4(0, 1.0 - t, t, t * 0.5));
}
vec2 mapShinyUv(vec2 uv, float level) {
float t = 1.0 / exp2(level);
return mapUv(uv, vec4(1.0 - t, 1.0 - t, t, t * 0.5));
}
#define ENV_ATLAS
uniform sampler2D texture_envAtlas;
uniform float material_reflectivity;
float shinyMipLevel(vec2 uv) {
vec2 dx = dFdx(uv);
vec2 dy = dFdy(uv);
vec2 uv2 = vec2(fract(uv.x + 0.5), uv.y);
vec2 dx2 = dFdx(uv2);
vec2 dy2 = dFdy(uv2);
float maxd = min(max(dot(dx, dx), dot(dy, dy)), max(dot(dx2, dx2), dot(dy2, dy2)));
return clamp(0.5 * log2(maxd) - 1.0 + textureBias, 0.0, 5.0);
}
vec3 calcReflection(vec3 tReflDirW, float tGlossiness) {
vec3 dir = cubeMapProject(tReflDirW) * vec3(-1.0, 1.0, 1.0);
vec2 uv = toSphericalUv(dir);
float level = saturate(1.0 - tGlossiness) * 5.0;
float ilevel = floor(level);
float level2 = shinyMipLevel(uv * atlasSize);
float ilevel2 = floor(level2);
vec2 uv0, uv1;
float weight;
if (ilevel == 0.0) {
uv0 = mapShinyUv(uv, ilevel2);
uv1 = mapShinyUv(uv, ilevel2 + 1.0);
weight = level2 - ilevel2;
}
else {
uv0 = uv1 = mapRoughnessUv(uv, ilevel);
weight = 0.0;
}
vec3 linearA = decodeRGBP(texture2D(texture_envAtlas, uv0));
vec3 linearB = decodeRGBP(texture2D(texture_envAtlas, uv1));
vec3 linear0 = mix(linearA, linearB, weight);
vec3 linear1 = decodeRGBP(texture2D(texture_envAtlas, mapRoughnessUv(uv, ilevel + 1.0)));
return processEnvironment(mix(linear0, linear1, level - ilevel));
}
void addReflection() {
dReflection += vec4(calcReflection(dReflDirW, dGlossiness), material_reflectivity);
}
vec2 getCubemapFaceCoordinates(const vec3 dir, out float faceIndex, out vec2 tileOffset) {
vec3 vAbs = abs(dir);
float ma;
vec2 uv;
if (vAbs.z >= vAbs.x && vAbs.z >= vAbs.y) {
faceIndex = dir.z < 0.0 ? 5.0 : 4.0;
ma = 0.5 / vAbs.z;
uv = vec2(dir.z < 0.0 ? -dir.x : dir.x, -dir.y);
tileOffset.x = 2.0;
tileOffset.y = dir.z < 0.0 ? 1.0 : 0.0;
}
else if(vAbs.y >= vAbs.x) {
faceIndex = dir.y < 0.0 ? 3.0 : 2.0;
ma = 0.5 / vAbs.y;
uv = vec2(dir.x, dir.y < 0.0 ? -dir.z : dir.z);
tileOffset.x = 1.0;
tileOffset.y = dir.y < 0.0 ? 1.0 : 0.0;
}
else {
faceIndex = dir.x < 0.0 ? 1.0 : 0.0;
ma = 0.5 / vAbs.x;
uv = vec2(dir.x < 0.0 ? dir.z : -dir.z, -dir.y);
tileOffset.x = 0.0;
tileOffset.y = dir.x < 0.0 ? 1.0 : 0.0;
}
return uv * ma + 0.5;
}
vec2 getCubemapAtlasCoordinates(const vec3 omniAtlasViewport, float shadowEdgePixels, float shadowTextureResolution, const vec3 dir) {
float faceIndex;
vec2 tileOffset;
vec2 uv = getCubemapFaceCoordinates(dir, faceIndex, tileOffset);
float atlasFaceSize = omniAtlasViewport.z;
float tileSize = shadowTextureResolution * atlasFaceSize;
float offset = shadowEdgePixels / tileSize;
uv = uv * vec2(1.0 - offset * 2.0) + vec2(offset * 1.0);
uv *= atlasFaceSize;
uv += tileOffset * atlasFaceSize;
uv += omniAtlasViewport.xy;
return uv;
}
vec3 lessThan2(vec3 a, vec3 b) {
return clamp((b - a)*1000.0, 0.0, 1.0);
}
#define UNPACKFLOAT
float unpackFloat(vec4 rgbaDepth) {
const vec4 bitShift = vec4(1.0 / (256.0 * 256.0 * 256.0), 1.0 / (256.0 * 256.0), 1.0 / 256.0, 1.0);
return dot(rgbaDepth, bitShift);
}
float _getShadowPCF3x3(SHADOWMAP_ACCEPT(shadowMap), vec3 shadowParams) {
float z = dShadowCoord.z;
vec2 uv = dShadowCoord.xy * shadowParams.x;
float shadowMapSizeInv = 1.0 / shadowParams.x;
vec2 base_uv = floor(uv + 0.5);
float s = (uv.x + 0.5 - base_uv.x);
float t = (uv.y + 0.5 - base_uv.y);
base_uv -= vec2(0.5);
base_uv *= shadowMapSizeInv;
float sum = 0.0;
float uw0 = (3.0 - 2.0 * s);
float uw1 = (1.0 + 2.0 * s);
float u0 = (2.0 - s) / uw0 - 1.0;
float u1 = s / uw1 + 1.0;
float vw0 = (3.0 - 2.0 * t);
float vw1 = (1.0 + 2.0 * t);
float v0 = (2.0 - t) / vw0 - 1.0;
float v1 = t / vw1 + 1.0;
u0 = u0 * shadowMapSizeInv + base_uv.x;
v0 = v0 * shadowMapSizeInv + base_uv.y;
u1 = u1 * shadowMapSizeInv + base_uv.x;
v1 = v1 * shadowMapSizeInv + base_uv.y;
sum += uw0 * vw0 * textureShadow(shadowMap, vec3(u0, v0, z));
sum += uw1 * vw0 * textureShadow(shadowMap, vec3(u1, v0, z));
sum += uw0 * vw1 * textureShadow(shadowMap, vec3(u0, v1, z));
sum += uw1 * vw1 * textureShadow(shadowMap, vec3(u1, v1, z));
sum *= 1.0f / 16.0;
return sum;
}
float getShadowPCF3x3(SHADOWMAP_ACCEPT(shadowMap), vec3 shadowParams) {
return _getShadowPCF3x3(SHADOWMAP_PASS(shadowMap), shadowParams);
}
float getShadowSpotPCF3x3(SHADOWMAP_ACCEPT(shadowMap), vec4 shadowParams) {
return _getShadowPCF3x3(SHADOWMAP_PASS(shadowMap), shadowParams.xyz);
}
float _getShadowPoint(samplerCube shadowMap, vec4 shadowParams, vec3 dir) {
vec3 tc = normalize(dir);
vec3 tcAbs = abs(tc);
vec4 dirX = vec4(1, 0, 0, tc.x);
vec4 dirY = vec4(0, 1, 0, tc.y);
float majorAxisLength = tc.z;
if ((tcAbs.x > tcAbs.y) && (tcAbs.x > tcAbs.z)) {
dirX = vec4(0, 0, 1, tc.z);
dirY = vec4(0, 1, 0, tc.y);
majorAxisLength = tc.x;
}
else if ((tcAbs.y > tcAbs.x) && (tcAbs.y > tcAbs.z)) {
dirX = vec4(1, 0, 0, tc.x);
dirY = vec4(0, 0, 1, tc.z);
majorAxisLength = tc.y;
}
float shadowParamsInFaceSpace = ((1.0/shadowParams.x) * 2.0) * abs(majorAxisLength);
vec3 xoffset = (dirX.xyz * shadowParamsInFaceSpace);
vec3 yoffset = (dirY.xyz * shadowParamsInFaceSpace);
vec3 dx0 = -xoffset;
vec3 dy0 = -yoffset;
vec3 dx1 = xoffset;
vec3 dy1 = yoffset;
mat3 shadowKernel;
mat3 depthKernel;
depthKernel[0][0] = unpackFloat(textureCube(shadowMap, tc + dx0 + dy0));
depthKernel[0][1] = unpackFloat(textureCube(shadowMap, tc + dx0));
depthKernel[0][2] = unpackFloat(textureCube(shadowMap, tc + dx0 + dy1));
depthKernel[1][0] = unpackFloat(textureCube(shadowMap, tc + dy0));
depthKernel[1][1] = unpackFloat(textureCube(shadowMap, tc));
depthKernel[1][2] = unpackFloat(textureCube(shadowMap, tc + dy1));
depthKernel[2][0] = unpackFloat(textureCube(shadowMap, tc + dx1 + dy0));
depthKernel[2][1] = unpackFloat(textureCube(shadowMap, tc + dx1));
depthKernel[2][2] = unpackFloat(textureCube(shadowMap, tc + dx1 + dy1));
vec3 shadowZ = vec3(length(dir) * shadowParams.w + shadowParams.z);
shadowKernel[0] = vec3(lessThan2(depthKernel[0], shadowZ));
shadowKernel[1] = vec3(lessThan2(depthKernel[1], shadowZ));
shadowKernel[2] = vec3(lessThan2(depthKernel[2], shadowZ));
vec2 uv = (vec2(dirX.w, dirY.w) / abs(majorAxisLength)) * 0.5;
vec2 fractionalCoord = fract( uv * shadowParams.x );
shadowKernel[0] = mix(shadowKernel[0], shadowKernel[1], fractionalCoord.x);
shadowKernel[1] = mix(shadowKernel[1], shadowKernel[2], fractionalCoord.x);
vec4 shadowValues;
shadowValues.x = mix(shadowKernel[0][0], shadowKernel[0][1], fractionalCoord.y);
shadowValues.y = mix(shadowKernel[0][1], shadowKernel[0][2], fractionalCoord.y);
shadowValues.z = mix(shadowKernel[1][0], shadowKernel[1][1], fractionalCoord.y);
shadowValues.w = mix(shadowKernel[1][1], shadowKernel[1][2], fractionalCoord.y);
return 1.0 - dot( shadowValues, vec4( 1.0 ) ) * 0.25;
}
float getShadowPointPCF3x3(samplerCube shadowMap, vec4 shadowParams) {
return _getShadowPoint(shadowMap, shadowParams, dLightDirW);
}
float _getShadowPCF5x5(SHADOWMAP_ACCEPT(shadowMap), vec3 shadowParams) {
float z = dShadowCoord.z;
vec2 uv = dShadowCoord.xy * shadowParams.x;
float shadowMapSizeInv = 1.0 / shadowParams.x;
vec2 base_uv = floor(uv + 0.5);
float s = (uv.x + 0.5 - base_uv.x);
float t = (uv.y + 0.5 - base_uv.y);
base_uv -= vec2(0.5);
base_uv *= shadowMapSizeInv;
float uw0 = (4.0 - 3.0 * s);
float uw1 = 7.0;
float uw2 = (1.0 + 3.0 * s);
float u0 = (3.0 - 2.0 * s) / uw0 - 2.0;
float u1 = (3.0 + s) / uw1;
float u2 = s / uw2 + 2.0;
float vw0 = (4.0 - 3.0 * t);
float vw1 = 7.0;
float vw2 = (1.0 + 3.0 * t);
float v0 = (3.0 - 2.0 * t) / vw0 - 2.0;
float v1 = (3.0 + t) / vw1;
float v2 = t / vw2 + 2.0;
float sum = 0.0;
u0 = u0 * shadowMapSizeInv + base_uv.x;
v0 = v0 * shadowMapSizeInv + base_uv.y;
u1 = u1 * shadowMapSizeInv + base_uv.x;
v1 = v1 * shadowMapSizeInv + base_uv.y;
u2 = u2 * shadowMapSizeInv + base_uv.x;
v2 = v2 * shadowMapSizeInv + base_uv.y;
sum += uw0 * vw0 * textureShadow(shadowMap, vec3(u0, v0, z));
sum += uw1 * vw0 * textureShadow(shadowMap, vec3(u1, v0, z));
sum += uw2 * vw0 * textureShadow(shadowMap, vec3(u2, v0, z));
sum += uw0 * vw1 * textureShadow(shadowMap, vec3(u0, v1, z));
sum += uw1 * vw1 * textureShadow(shadowMap, vec3(u1, v1, z));
sum += uw2 * vw1 * textureShadow(shadowMap, vec3(u2, v1, z));
sum += uw0 * vw2 * textureShadow(shadowMap, vec3(u0, v2, z));
sum += uw1 * vw2 * textureShadow(shadowMap, vec3(u1, v2, z));
sum += uw2 * vw2 * textureShadow(shadowMap, vec3(u2, v2, z));
sum *= 1.0f / 144.0;
sum = saturate(sum);
return sum;
}
float getShadowPCF5x5(SHADOWMAP_ACCEPT(shadowMap), vec3 shadowParams) {
return _getShadowPCF5x5(SHADOWMAP_PASS(shadowMap), shadowParams);
}
float getShadowSpotPCF5x5(SHADOWMAP_ACCEPT(shadowMap), vec4 shadowParams) {
return _getShadowPCF5x5(SHADOWMAP_PASS(shadowMap), shadowParams.xyz);
}
void _getShadowCoordOrtho(mat4 shadowMatrix, vec3 shadowParams, vec3 wPos) {
dShadowCoord = (shadowMatrix * vec4(wPos, 1.0)).xyz;
dShadowCoord.z = saturate(dShadowCoord.z) - 0.0001;
}
void _getShadowCoordPersp(mat4 shadowMatrix, vec4 shadowParams, vec3 wPos) {
vec4 projPos = shadowMatrix * vec4(wPos, 1.0);
projPos.xy /= projPos.w;
dShadowCoord.xy = projPos.xy;
dShadowCoord.z = length(dLightDirW) * shadowParams.w;
}
void getShadowCoordOrtho(mat4 shadowMatrix, vec3 shadowParams) {
_getShadowCoordOrtho(shadowMatrix, shadowParams, vPositionW);
}
void getShadowCoordPersp(mat4 shadowMatrix, vec4 shadowParams) {
_getShadowCoordPersp(shadowMatrix, shadowParams, vPositionW);
}
void getShadowCoordPerspNormalOffset(mat4 shadowMatrix, vec4 shadowParams) {
float distScale = abs(dot(vPositionW - dLightPosW, dLightDirNormW));
vec3 wPos = vPositionW + dVertexNormalW * shadowParams.y * clamp(1.0 - dot(dVertexNormalW, -dLightDirNormW), 0.0, 1.0) * distScale;
_getShadowCoordPersp(shadowMatrix, shadowParams, wPos);
}
void getShadowCoordOrthoNormalOffset(mat4 shadowMatrix, vec3 shadowParams) {
vec3 wPos = vPositionW + dVertexNormalW * shadowParams.y * clamp(1.0 - dot(dVertexNormalW, -dLightDirNormW), 0.0, 1.0);
_getShadowCoordOrtho(shadowMatrix, shadowParams, wPos);
}
void normalOffsetPointShadow(vec4 shadowParams) {
float distScale = length(dLightDirW);
vec3 wPos = vPositionW + dVertexNormalW * shadowParams.y * clamp(1.0 - dot(dVertexNormalW, -dLightDirNormW), 0.0, 1.0) * distScale;
vec3 dir = wPos - dLightPosW;
dLightDirW = dir;
}
void _getShadowCoordPerspZbuffer(mat4 shadowMatrix, vec4 shadowParams, vec3 wPos) {
vec4 projPos = shadowMatrix * vec4(wPos, 1.0);
projPos.xyz /= projPos.w;
dShadowCoord = projPos.xyz;
}
void getShadowCoordPerspZbufferNormalOffset(mat4 shadowMatrix, vec4 shadowParams) {
vec3 wPos = vPositionW + dVertexNormalW * shadowParams.y;
_getShadowCoordPerspZbuffer(shadowMatrix, shadowParams, wPos);
}
void getShadowCoordPerspZbuffer(mat4 shadowMatrix, vec4 shadowParams) {
_getShadowCoordPerspZbuffer(shadowMatrix, shadowParams, vPositionW);
}
float getLightDiffuse() {
return max(dot(dNormalW, -dLightDirNormW), 0.0);
}
mat3 transposeMat3( const in mat3 m ) {
mat3 tmp;
tmp[ 0 ] = vec3( m[ 0 ].x, m[ 1 ].x, m[ 2 ].x );
tmp[ 1 ] = vec3( m[ 0 ].y, m[ 1 ].y, m[ 2 ].y );
tmp[ 2 ] = vec3( m[ 0 ].z, m[ 1 ].z, m[ 2 ].z );
return tmp;
}
vec2 LTC_Uv( const in vec3 N, const in vec3 V, const in float roughness ) {
const float LUT_SIZE = 64.0;
const float LUT_SCALE = ( LUT_SIZE - 1.0 ) / LUT_SIZE;
const float LUT_BIAS = 0.5 / LUT_SIZE;
float dotNV = saturate( dot( N, V ) );
vec2 uv = vec2( roughness, sqrt( 1.0 - dotNV ) );
uv = uv * LUT_SCALE + LUT_BIAS;
return uv;
}
float LTC_ClippedSphereFormFactor( const in vec3 f ) {
float l = length( f );
return max( ( l * l + f.z ) / ( l + 1.0 ), 0.0 );
}
vec3 LTC_EdgeVectorFormFactor( const in vec3 v1, const in vec3 v2 ) {
float x = dot( v1, v2 );
float y = abs( x );
float a = 0.8543985 + ( 0.4965155 + 0.0145206 * y ) * y;
float b = 3.4175940 + ( 4.1616724 + y ) * y;
float v = a / b;
float theta_sintheta = ( x > 0.0 ) ? v : 0.5 * inversesqrt( max( 1.0 - x * x, 1e-7 ) ) - v;
return cross( v1, v2 ) * theta_sintheta;
}
struct Coords {
vec3 coord0;
vec3 coord1;
vec3 coord2;
vec3 coord3;
};
float LTC_EvaluateRect( const in vec3 N, const in vec3 V, const in vec3 P, const in mat3 mInv, const in Coords rectCoords) {
vec3 v1 = rectCoords.coord1 - rectCoords.coord0;
vec3 v2 = rectCoords.coord3 - rectCoords.coord0;
vec3 lightNormal = cross( v1, v2 );
float factor = sign(-dot( lightNormal, P - rectCoords.coord0 ));
vec3 T1, T2;
T1 = normalize( V - N * dot( V, N ) );
T2 = factor * cross( N, T1 );
mat3 mat = mInv * transposeMat3( mat3( T1, T2, N ) );
vec3 coords[ 4 ];
coords[ 0 ] = mat * ( rectCoords.coord0 - P );
coords[ 1 ] = mat * ( rectCoords.coord1 - P );
coords[ 2 ] = mat * ( rectCoords.coord2 - P );
coords[ 3 ] = mat * ( rectCoords.coord3 - P );
coords[ 0 ] = normalize( coords[ 0 ] );
coords[ 1 ] = normalize( coords[ 1 ] );
coords[ 2 ] = normalize( coords[ 2 ] );
coords[ 3 ] = normalize( coords[ 3 ] );
vec3 vectorFormFactor = vec3( 0.0 );
vectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 0 ], coords[ 1 ] );
vectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 1 ], coords[ 2 ] );
vectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 2 ], coords[ 3 ] );
vectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 3 ], coords[ 0 ] );
float result = LTC_ClippedSphereFormFactor( vectorFormFactor );
return result;
}
Coords dLTCCoords;
Coords getLTCLightCoords(vec3 lightPos, vec3 halfWidth, vec3 halfHeight) {
Coords coords;
coords.coord0 = lightPos + halfWidth - halfHeight;
coords.coord1 = lightPos - halfWidth - halfHeight;
coords.coord2 = lightPos - halfWidth + halfHeight;
coords.coord3 = lightPos + halfWidth + halfHeight;
return coords;
}
float dSphereRadius;
Coords getSphereLightCoords(vec3 lightPos, vec3 halfWidth, vec3 halfHeight) {
dSphereRadius = max(length(halfWidth), length(halfHeight));
vec3 f = reflect(normalize(lightPos - view_position), vNormalW);
vec3 w = normalize(cross(f, halfHeight));
vec3 h = normalize(cross(f, w));
return getLTCLightCoords(lightPos, w * dSphereRadius, h * dSphereRadius);
}
vec2 dLTCUV;
vec2 getLTCLightUV(float tGlossiness, vec3 tNormalW) {
float roughness = max((1.0 - tGlossiness) * (1.0 - tGlossiness), 0.001);
return LTC_Uv( tNormalW, dViewDirW, roughness );
}
vec3 dLTCSpecFres;
vec3 getLTCLightSpecFres(vec2 uv, vec3 tSpecularity) {
vec4 t2 = texture2DLodEXT(areaLightsLutTex2, uv, 0.0);
return tSpecularity * t2.x + ( vec3( 1.0 ) - tSpecularity) * t2.y;
}
void calcLTCLightValues() {
dLTCUV = getLTCLightUV(dGlossiness, dNormalW);
dLTCSpecFres = getLTCLightSpecFres(dLTCUV, dSpecularity);
}
void calcRectLightValues(vec3 lightPos, vec3 halfWidth, vec3 halfHeight) {
dLTCCoords = getLTCLightCoords(lightPos, halfWidth, halfHeight);
}
void calcDiskLightValues(vec3 lightPos, vec3 halfWidth, vec3 halfHeight) {
calcRectLightValues(lightPos, halfWidth, halfHeight);
}
void calcSphereLightValues(vec3 lightPos, vec3 halfWidth, vec3 halfHeight) {
dLTCCoords = getSphereLightCoords(lightPos, halfWidth, halfHeight);
}
vec3 SolveCubic(vec4 Coefficient) {
float pi = 3.14159;
Coefficient.xyz /= Coefficient.w;
Coefficient.yz /= 3.0;
float A = Coefficient.w;
float B = Coefficient.z;
float C = Coefficient.y;
float D = Coefficient.x;
vec3 Delta = vec3(
-Coefficient.z * Coefficient.z + Coefficient.y, -Coefficient.y * Coefficient.z + Coefficient.x, dot(vec2(Coefficient.z, -Coefficient.y), Coefficient.xy)
);