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gkjohnson/shader-compilation-benchmark.js

Last active April 30, 2019 17:06
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shader-compilation-benchmark.js
function test(count = 100) {
const gl = document.createElement('canvas').getContext('webgl');
function compileShader(gl, shaderSource, shaderType) {
var shader = gl.createShader(shaderType);
gl.shaderSource(shader, shaderSource);
gl.compileShader(shader);
return shader;
}
function checkShaderSuccess(gl, shader) {
var success = gl.getShaderParameter(shader, gl.COMPILE_STATUS);
if (!success) {
throw "could not compile shader:" + gl.getShaderInfoLog(shader);
}
}
function createProgram(gl, vertexShader, fragmentShader) {
var program = gl.createProgram();
gl.attachShader(program, vertexShader);
gl.attachShader(program, fragmentShader);
gl.linkProgram(program);
return program;
};
function checkProgramSuccess(gl, program) {
var success = gl.getProgramParameter(program, gl.LINK_STATUS);
if (!success) {
throw ("program filed to link:" + gl.getProgramInfoLog (program));
}
}
console.time('Test 1: Check Shader Compilation Immediately');
for (let i = 0; i < count; i ++) {
const v = compileShader(gl, vShader, gl.VERTEX_SHADER);
checkShaderSuccess(gl, v);
const f = compileShader(gl, fShader, gl.FRAGMENT_SHADER);
checkShaderSuccess(gl, f);
const p = createProgram(gl, v, f);
checkProgramSuccess(gl, p);
}
console.timeEnd('Test 1: Check Shader Compilation Immediately');
console.time('Test 2: Check Compilation After Program Creation');
for (let i = 0; i < count; i ++) {
const v = compileShader(gl, vShader, gl.VERTEX_SHADER);
const f = compileShader(gl, fShader, gl.FRAGMENT_SHADER);
const p = createProgram(gl, v, f);
checkShaderSuccess(gl, v);
checkShaderSuccess(gl, f);
checkProgramSuccess(gl, p);
}
console.timeEnd('Test 2: Check Compilation After Program Creation');
console.time('Test 3: Parallel Shader Compilation');
var arr = [];
for (let i = 0; i < count; i ++) {
const v = compileShader(gl, vShader, gl.VERTEX_SHADER);
const f = compileShader(gl, fShader, gl.FRAGMENT_SHADER);
const p = createProgram(gl, v, f);
arr.push({ v, f, p });
}
for (let i = 0; i < count; i ++) {
const { v, f, p } = arr[i];
checkShaderSuccess(gl, v);
checkShaderSuccess(gl, f);
checkProgramSuccess(gl, p);
}
console.timeEnd('Test 3: Parallel Shader Compilation');
const ext = gl.getExtension('KHR_parallel_shader_compile');
console.log('Parallel Extension: ', ext)
console.time('Test 4: Parallel Shader Compilation with Extension');
var arr = [];
for (let i = 0; i < count; i ++) {
const v = compileShader(gl, vShader, gl.VERTEX_SHADER);
const f = compileShader(gl, fShader, gl.FRAGMENT_SHADER);
const p = createProgram(gl, v, f);
arr.push({ v, f, p });
}
for (let i = 0; i < count; i ++) {
const { v, f, p } = arr[i];
checkShaderSuccess(gl, v);
checkShaderSuccess(gl, f);
checkProgramSuccess(gl, p);
}
console.timeEnd('Test 4: Parallel Shader Compilation with Extension');
console.time('Test 5: Immediate Check with Extra Work');
for (let i = 0; i < count; i ++) {
const v = compileShader(gl, vShader, gl.VERTEX_SHADER);
checkShaderSuccess(gl, v);
const f = compileShader(gl, fShader, gl.FRAGMENT_SHADER);
checkShaderSuccess(gl, f);
const p = createProgram(gl, v, f);
checkProgramSuccess(gl, p);
}
let now = window.performance.now();
while(window.performance.now() - now < 3000);
console.timeEnd('Test 5: Immediate Check with Extra Work');
console.time('Test 6: Delayed Check with Extra Work');
var arr = [];
for (let i = 0; i < count; i ++) {
const v = compileShader(gl, vShader, gl.VERTEX_SHADER);
const f = compileShader(gl, fShader, gl.FRAGMENT_SHADER);
const p = createProgram(gl, v, f);
arr.push({ v, f, p });
}
now = window.performance.now();
while(window.performance.now() - now < 3000);
for (let i = 0; i < count; i ++) {
const { v, f, p } = arr[i];
checkShaderSuccess(gl, v);
checkShaderSuccess(gl, f);
checkProgramSuccess(gl, p);
}
console.timeEnd('Test 6: Delayed Check with Extra Work');
}
var vShader = `
precision highp float;
precision highp int;
#define SHADER_NAME ShaderMaterial
#define ENABLE_DITHER_TRANSPARENCY 1
#define VERTEX_TEXTURES
#define GAMMA_FACTOR 2
#define MAX_BONES 0
#define BONE_TEXTURE
#define USE_SHADOWMAP
#define SHADOWMAP_TYPE_PCF_SOFT
uniform mat4 modelMatrix;
uniform mat4 modelViewMatrix;
uniform mat4 projectionMatrix;
uniform mat4 viewMatrix;
uniform mat3 normalMatrix;
uniform vec3 cameraPosition;
attribute vec3 position;
attribute vec3 normal;
attribute vec2 uv;
#ifdef USE_TANGENT
attribute vec4 tangent;
#endif
#ifdef USE_COLOR
attribute vec3 color;
#endif
#ifdef USE_MORPHTARGETS
attribute vec3 morphTarget0;
attribute vec3 morphTarget1;
attribute vec3 morphTarget2;
attribute vec3 morphTarget3;
#ifdef USE_MORPHNORMALS
attribute vec3 morphNormal0;
attribute vec3 morphNormal1;
attribute vec3 morphNormal2;
attribute vec3 morphNormal3;
#else
attribute vec3 morphTarget4;
attribute vec3 morphTarget5;
attribute vec3 morphTarget6;
attribute vec3 morphTarget7;
#endif
#endif
#ifdef USE_SKINNING
attribute vec4 skinIndex;
attribute vec4 skinWeight;
#endif
#define PHONG
varying vec3 vViewPosition;
#ifndef FLAT_SHADED
varying vec3 vNormal;
#endif
#define PI 3.14159265359
#define PI2 6.28318530718
#define PI_HALF 1.5707963267949
#define RECIPROCAL_PI 0.31830988618
#define RECIPROCAL_PI2 0.15915494
#define LOG2 1.442695
#define EPSILON 1e-6
#define saturate(a) clamp( a, 0.0, 1.0 )
#define whiteCompliment(a) ( 1.0 - saturate( a ) )
float pow2( const in float x ) { return x*x; }
float pow3( const in float x ) { return x*x*x; }
float pow4( const in float x ) { float x2 = x*x; return x2*x2; }
float average( const in vec3 color ) { return dot( color, vec3( 0.3333 ) ); }
highp float rand( const in vec2 uv ) {
const highp float a = 12.9898, b = 78.233, c = 43758.5453;
highp float dt = dot( uv.xy, vec2( a,b ) ), sn = mod( dt, PI );
return fract(sin(sn) * c);
}
struct IncidentLight {
vec3 color;
vec3 direction;
bool visible;
};
struct ReflectedLight {
vec3 directDiffuse;
vec3 directSpecular;
vec3 indirectDiffuse;
vec3 indirectSpecular;
};
struct GeometricContext {
vec3 position;
vec3 normal;
vec3 viewDir;
};
vec3 transformDirection( in vec3 dir, in mat4 matrix ) {
return normalize( ( matrix * vec4( dir, 0.0 ) ).xyz );
}
vec3 inverseTransformDirection( in vec3 dir, in mat4 matrix ) {
return normalize( ( vec4( dir, 0.0 ) * matrix ).xyz );
}
vec3 projectOnPlane(in vec3 point, in vec3 pointOnPlane, in vec3 planeNormal ) {
float distance = dot( planeNormal, point - pointOnPlane );
return - distance * planeNormal + point;
}
float sideOfPlane( in vec3 point, in vec3 pointOnPlane, in vec3 planeNormal ) {
return sign( dot( point - pointOnPlane, planeNormal ) );
}
vec3 linePlaneIntersect( in vec3 pointOnLine, in vec3 lineDirection, in vec3 pointOnPlane, in vec3 planeNormal ) {
return lineDirection * ( dot( planeNormal, pointOnPlane - pointOnLine ) / dot( planeNormal, lineDirection ) ) + pointOnLine;
}
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;
}
float linearToRelativeLuminance( const in vec3 color ) {
vec3 weights = vec3( 0.2126, 0.7152, 0.0722 );
return dot( weights, color.rgb );
}
#if defined( USE_MAP ) || defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( USE_SPECULARMAP ) || defined( USE_ALPHAMAP ) || defined( USE_EMISSIVEMAP ) || defined( USE_ROUGHNESSMAP ) || defined( USE_METALNESSMAP )
varying vec2 vUv;
uniform mat3 uvTransform;
#endif
#if defined( USE_LIGHTMAP ) || defined( USE_AOMAP )
attribute vec2 uv2;
varying vec2 vUv2;
#endif
#ifdef USE_DISPLACEMENTMAP
uniform sampler2D displacementMap;
uniform float displacementScale;
uniform float displacementBias;
#endif
#ifdef USE_ENVMAP
#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( PHONG )
varying vec3 vWorldPosition;
#else
varying vec3 vReflect;
uniform float refractionRatio;
#endif
#endif
#ifdef USE_COLOR
varying vec3 vColor;
#endif
#ifdef USE_FOG
varying float fogDepth;
#endif
#ifdef USE_MORPHTARGETS
#ifndef USE_MORPHNORMALS
uniform float morphTargetInfluences[ 8 ];
#else
uniform float morphTargetInfluences[ 4 ];
#endif
#endif
#ifdef USE_SKINNING
uniform mat4 bindMatrix;
uniform mat4 bindMatrixInverse;
#ifdef BONE_TEXTURE
uniform sampler2D boneTexture;
uniform int boneTextureSize;
mat4 getBoneMatrix( const in float i ) {
float j = i * 4.0;
float x = mod( j, float( boneTextureSize ) );
float y = floor( j / float( boneTextureSize ) );
float dx = 1.0 / float( boneTextureSize );
float dy = 1.0 / float( boneTextureSize );
y = dy * ( y + 0.5 );
vec4 v1 = texture2D( boneTexture, vec2( dx * ( x + 0.5 ), y ) );
vec4 v2 = texture2D( boneTexture, vec2( dx * ( x + 1.5 ), y ) );
vec4 v3 = texture2D( boneTexture, vec2( dx * ( x + 2.5 ), y ) );
vec4 v4 = texture2D( boneTexture, vec2( dx * ( x + 3.5 ), y ) );
mat4 bone = mat4( v1, v2, v3, v4 );
return bone;
}
#else
uniform mat4 boneMatrices[ MAX_BONES ];
mat4 getBoneMatrix( const in float i ) {
mat4 bone = boneMatrices[ int(i) ];
return bone;
}
#endif
#endif
#ifdef USE_SHADOWMAP
#if 1 > 0
uniform mat4 directionalShadowMatrix[ 1 ];
varying vec4 vDirectionalShadowCoord[ 1 ];
#endif
#if 0 > 0
uniform mat4 spotShadowMatrix[ 0 ];
varying vec4 vSpotShadowCoord[ 0 ];
#endif
#if 0 > 0
uniform mat4 pointShadowMatrix[ 0 ];
varying vec4 vPointShadowCoord[ 0 ];
#endif
#endif
#ifdef USE_LOGDEPTHBUF
#ifdef USE_LOGDEPTHBUF_EXT
varying float vFragDepth;
#else
uniform float logDepthBufFC;
#endif
#endif
#if 0 > 0 && ! defined( PHYSICAL ) && ! defined( PHONG ) && ! defined( MATCAP )
varying vec3 vViewPosition;
#endif
void main() {
#if defined( USE_MAP ) || defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( USE_SPECULARMAP ) || defined( USE_ALPHAMAP ) || defined( USE_EMISSIVEMAP ) || defined( USE_ROUGHNESSMAP ) || defined( USE_METALNESSMAP )
vUv = ( uvTransform * vec3( uv, 1 ) ).xy;
#endif
#if defined( USE_LIGHTMAP ) || defined( USE_AOMAP )
vUv2 = uv2;
#endif
#ifdef USE_COLOR
vColor.xyz = color.xyz;
#endif
vec3 objectNormal = vec3( normal );
#ifdef USE_TANGENT
vec3 objectTangent = vec3( tangent.xyz );
#endif
#ifdef USE_MORPHNORMALS
objectNormal += ( morphNormal0 - normal ) * morphTargetInfluences[ 0 ];
objectNormal += ( morphNormal1 - normal ) * morphTargetInfluences[ 1 ];
objectNormal += ( morphNormal2 - normal ) * morphTargetInfluences[ 2 ];
objectNormal += ( morphNormal3 - normal ) * morphTargetInfluences[ 3 ];
#endif
#ifdef USE_SKINNING
mat4 boneMatX = getBoneMatrix( skinIndex.x );
mat4 boneMatY = getBoneMatrix( skinIndex.y );
mat4 boneMatZ = getBoneMatrix( skinIndex.z );
mat4 boneMatW = getBoneMatrix( skinIndex.w );
#endif
#ifdef USE_SKINNING
mat4 skinMatrix = mat4( 0.0 );
skinMatrix += skinWeight.x * boneMatX;
skinMatrix += skinWeight.y * boneMatY;
skinMatrix += skinWeight.z * boneMatZ;
skinMatrix += skinWeight.w * boneMatW;
skinMatrix = bindMatrixInverse * skinMatrix * bindMatrix;
objectNormal = vec4( skinMatrix * vec4( objectNormal, 0.0 ) ).xyz;
#ifdef USE_TANGENT
objectTangent = vec4( skinMatrix * vec4( objectTangent, 0.0 ) ).xyz;
#endif
#endif
vec3 transformedNormal = normalMatrix * objectNormal;
#ifdef FLIP_SIDED
transformedNormal = - transformedNormal;
#endif
#ifdef USE_TANGENT
vec3 transformedTangent = normalMatrix * objectTangent;
#ifdef FLIP_SIDED
transformedTangent = - transformedTangent;
#endif
#endif
#ifndef FLAT_SHADED
vNormal = normalize( transformedNormal );
#endif
vec3 transformed = vec3( position );
#ifdef USE_MORPHTARGETS
transformed += ( morphTarget0 - position ) * morphTargetInfluences[ 0 ];
transformed += ( morphTarget1 - position ) * morphTargetInfluences[ 1 ];
transformed += ( morphTarget2 - position ) * morphTargetInfluences[ 2 ];
transformed += ( morphTarget3 - position ) * morphTargetInfluences[ 3 ];
#ifndef USE_MORPHNORMALS
transformed += ( morphTarget4 - position ) * morphTargetInfluences[ 4 ];
transformed += ( morphTarget5 - position ) * morphTargetInfluences[ 5 ];
transformed += ( morphTarget6 - position ) * morphTargetInfluences[ 6 ];
transformed += ( morphTarget7 - position ) * morphTargetInfluences[ 7 ];
#endif
#endif
#ifdef USE_SKINNING
vec4 skinVertex = bindMatrix * vec4( transformed, 1.0 );
vec4 skinned = vec4( 0.0 );
skinned += boneMatX * skinVertex * skinWeight.x;
skinned += boneMatY * skinVertex * skinWeight.y;
skinned += boneMatZ * skinVertex * skinWeight.z;
skinned += boneMatW * skinVertex * skinWeight.w;
transformed = ( bindMatrixInverse * skinned ).xyz;
#endif
#ifdef USE_DISPLACEMENTMAP
transformed += normalize( objectNormal ) * ( texture2D( displacementMap, uv ).x * displacementScale + displacementBias );
#endif
vec4 mvPosition = modelViewMatrix * vec4( transformed, 1.0 );
gl_Position = projectionMatrix * mvPosition;
#ifdef USE_LOGDEPTHBUF
#ifdef USE_LOGDEPTHBUF_EXT
vFragDepth = 1.0 + gl_Position.w;
#else
gl_Position.z = log2( max( EPSILON, gl_Position.w + 1.0 ) ) * logDepthBufFC - 1.0;
gl_Position.z *= gl_Position.w;
#endif
#endif
#if 0 > 0 && ! defined( PHYSICAL ) && ! defined( PHONG ) && ! defined( MATCAP )
vViewPosition = - mvPosition.xyz;
#endif
vViewPosition = - mvPosition.xyz;
#if defined( USE_ENVMAP ) || defined( DISTANCE ) || defined ( USE_SHADOWMAP )
vec4 worldPosition = modelMatrix * vec4( transformed, 1.0 );
#endif
#ifdef USE_ENVMAP
#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( PHONG )
vWorldPosition = worldPosition.xyz;
#else
vec3 cameraToVertex = normalize( worldPosition.xyz - cameraPosition );
vec3 worldNormal = inverseTransformDirection( transformedNormal, viewMatrix );
#ifdef ENVMAP_MODE_REFLECTION
vReflect = reflect( cameraToVertex, worldNormal );
#else
vReflect = refract( cameraToVertex, worldNormal, refractionRatio );
#endif
#endif
#endif
#ifdef USE_SHADOWMAP
#if 1 > 0
vDirectionalShadowCoord[ 0 ] = directionalShadowMatrix[ 0 ] * worldPosition;
#endif
#if 0 > 0
#endif
#if 0 > 0
#endif
#endif
#ifdef USE_FOG
fogDepth = -mvPosition.z;
#endif
}
`;
var fShader = `
precision highp float;
precision highp int;
#define SHADER_NAME ShaderMaterial
#define ENABLE_DITHER_TRANSPARENCY 1
#define GAMMA_FACTOR 2
#define USE_SHADOWMAP
#define SHADOWMAP_TYPE_PCF_SOFT
uniform mat4 viewMatrix;
uniform vec3 cameraPosition;
#define TONE_MAPPING
#ifndef saturate
#define saturate(a) clamp( a, 0.0, 1.0 )
#endif
uniform float toneMappingExposure;
uniform float toneMappingWhitePoint;
vec3 LinearToneMapping( vec3 color ) {
return toneMappingExposure * color;
}
vec3 ReinhardToneMapping( vec3 color ) {
color *= toneMappingExposure;
return saturate( color / ( vec3( 1.0 ) + color ) );
}
#define Uncharted2Helper( x ) max( ( ( x * ( 0.15 * x + 0.10 * 0.50 ) + 0.20 * 0.02 ) / ( x * ( 0.15 * x + 0.50 ) + 0.20 * 0.30 ) ) - 0.02 / 0.30, vec3( 0.0 ) )
vec3 Uncharted2ToneMapping( vec3 color ) {
color *= toneMappingExposure;
return saturate( Uncharted2Helper( color ) / Uncharted2Helper( vec3( toneMappingWhitePoint ) ) );
}
vec3 OptimizedCineonToneMapping( vec3 color ) {
color *= toneMappingExposure;
color = max( vec3( 0.0 ), color - 0.004 );
return pow( ( color * ( 6.2 * color + 0.5 ) ) / ( color * ( 6.2 * color + 1.7 ) + 0.06 ), vec3( 2.2 ) );
}
vec3 ACESFilmicToneMapping( vec3 color ) {
color *= toneMappingExposure;
return saturate( ( color * ( 2.51 * color + 0.03 ) ) / ( color * ( 2.43 * color + 0.59 ) + 0.14 ) );
}
vec3 toneMapping( vec3 color ) { return LinearToneMapping( color ); }
vec4 LinearToLinear( in vec4 value ) {
return value;
}
vec4 GammaToLinear( in vec4 value, in float gammaFactor ) {
return vec4( pow( value.rgb, vec3( gammaFactor ) ), value.a );
}
vec4 LinearToGamma( in vec4 value, in float gammaFactor ) {
return vec4( pow( value.rgb, vec3( 1.0 / gammaFactor ) ), value.a );
}
vec4 sRGBToLinear( in vec4 value ) {
return vec4( mix( pow( value.rgb * 0.9478672986 + vec3( 0.0521327014 ), vec3( 2.4 ) ), value.rgb * 0.0773993808, vec3( lessThanEqual( value.rgb, vec3( 0.04045 ) ) ) ), value.a );
}
vec4 LinearTosRGB( in vec4 value ) {
return vec4( mix( pow( value.rgb, vec3( 0.41666 ) ) * 1.055 - vec3( 0.055 ), value.rgb * 12.92, vec3( lessThanEqual( value.rgb, vec3( 0.0031308 ) ) ) ), value.a );
}
vec4 RGBEToLinear( in vec4 value ) {
return vec4( value.rgb * exp2( value.a * 255.0 - 128.0 ), 1.0 );
}
vec4 LinearToRGBE( in vec4 value ) {
float maxComponent = max( max( value.r, value.g ), value.b );
float fExp = clamp( ceil( log2( maxComponent ) ), -128.0, 127.0 );
return vec4( value.rgb / exp2( fExp ), ( fExp + 128.0 ) / 255.0 );
}
vec4 RGBMToLinear( in vec4 value, in float maxRange ) {
return vec4( value.rgb * value.a * maxRange, 1.0 );
}
vec4 LinearToRGBM( in vec4 value, in float maxRange ) {
float maxRGB = max( value.r, max( value.g, value.b ) );
float M = clamp( maxRGB / maxRange, 0.0, 1.0 );
M = ceil( M * 255.0 ) / 255.0;
return vec4( value.rgb / ( M * maxRange ), M );
}
vec4 RGBDToLinear( in vec4 value, in float maxRange ) {
return vec4( value.rgb * ( ( maxRange / 255.0 ) / value.a ), 1.0 );
}
vec4 LinearToRGBD( in vec4 value, in float maxRange ) {
float maxRGB = max( value.r, max( value.g, value.b ) );
float D = max( maxRange / maxRGB, 1.0 );
D = min( floor( D ) / 255.0, 1.0 );
return vec4( value.rgb * ( D * ( 255.0 / maxRange ) ), D );
}
const mat3 cLogLuvM = mat3( 0.2209, 0.3390, 0.4184, 0.1138, 0.6780, 0.7319, 0.0102, 0.1130, 0.2969 );
vec4 LinearToLogLuv( in vec4 value ) {
vec3 Xp_Y_XYZp = cLogLuvM * value.rgb;
Xp_Y_XYZp = max( Xp_Y_XYZp, vec3( 1e-6, 1e-6, 1e-6 ) );
vec4 vResult;
vResult.xy = Xp_Y_XYZp.xy / Xp_Y_XYZp.z;
float Le = 2.0 * log2(Xp_Y_XYZp.y) + 127.0;
vResult.w = fract( Le );
vResult.z = ( Le - ( floor( vResult.w * 255.0 ) ) / 255.0 ) / 255.0;
return vResult;
}
const mat3 cLogLuvInverseM = mat3( 6.0014, -2.7008, -1.7996, -1.3320, 3.1029, -5.7721, 0.3008, -1.0882, 5.6268 );
vec4 LogLuvToLinear( in vec4 value ) {
float Le = value.z * 255.0 + value.w;
vec3 Xp_Y_XYZp;
Xp_Y_XYZp.y = exp2( ( Le - 127.0 ) / 2.0 );
Xp_Y_XYZp.z = Xp_Y_XYZp.y / value.y;
Xp_Y_XYZp.x = value.x * Xp_Y_XYZp.z;
vec3 vRGB = cLogLuvInverseM * Xp_Y_XYZp.rgb;
return vec4( max( vRGB, 0.0 ), 1.0 );
}
vec4 mapTexelToLinear( vec4 value ) { return GammaToLinear( value, float( GAMMA_FACTOR ) ); }
vec4 matcapTexelToLinear( vec4 value ) { return GammaToLinear( value, float( GAMMA_FACTOR ) ); }
vec4 envMapTexelToLinear( vec4 value ) { return GammaToLinear( value, float( GAMMA_FACTOR ) ); }
vec4 emissiveMapTexelToLinear( vec4 value ) { return GammaToLinear( value, float( GAMMA_FACTOR ) ); }
vec4 linearToOutputTexel( vec4 value ) { return LinearToGamma( value, float( GAMMA_FACTOR ) ); }
// adapted from https://www.shadertoy.com/view/Mlt3z8
float bayerDither2x2( vec2 v ) {
return mod( 3.0 * v.y + 2.0 * v.x, 4.0 );
}
float bayerDither4x4( vec2 v ) {
vec2 P1 = mod( v, 2.0 );
vec2 P2 = mod( floor( 0.5 * v ), 2.0 );
return 4.0 * bayerDither2x2( P1 ) + bayerDither2x2( P2 );
}
uniform sampler2D ditherTex;
#define PHONG
uniform vec3 diffuse;
uniform vec3 emissive;
uniform vec3 specular;
uniform float shininess;
uniform float opacity;
#define PI 3.14159265359
#define PI2 6.28318530718
#define PI_HALF 1.5707963267949
#define RECIPROCAL_PI 0.31830988618
#define RECIPROCAL_PI2 0.15915494
#define LOG2 1.442695
#define EPSILON 1e-6
#define saturate(a) clamp( a, 0.0, 1.0 )
#define whiteCompliment(a) ( 1.0 - saturate( a ) )
float pow2( const in float x ) { return x*x; }
float pow3( const in float x ) { return x*x*x; }
float pow4( const in float x ) { float x2 = x*x; return x2*x2; }
float average( const in vec3 color ) { return dot( color, vec3( 0.3333 ) ); }
highp float rand( const in vec2 uv ) {
const highp float a = 12.9898, b = 78.233, c = 43758.5453;
highp float dt = dot( uv.xy, vec2( a,b ) ), sn = mod( dt, PI );
return fract(sin(sn) * c);
}
struct IncidentLight {
vec3 color;
vec3 direction;
bool visible;
};
struct ReflectedLight {
vec3 directDiffuse;
vec3 directSpecular;
vec3 indirectDiffuse;
vec3 indirectSpecular;
};
struct GeometricContext {
vec3 position;
vec3 normal;
vec3 viewDir;
};
vec3 transformDirection( in vec3 dir, in mat4 matrix ) {
return normalize( ( matrix * vec4( dir, 0.0 ) ).xyz );
}
vec3 inverseTransformDirection( in vec3 dir, in mat4 matrix ) {
return normalize( ( vec4( dir, 0.0 ) * matrix ).xyz );
}
vec3 projectOnPlane(in vec3 point, in vec3 pointOnPlane, in vec3 planeNormal ) {
float distance = dot( planeNormal, point - pointOnPlane );
return - distance * planeNormal + point;
}
float sideOfPlane( in vec3 point, in vec3 pointOnPlane, in vec3 planeNormal ) {
return sign( dot( point - pointOnPlane, planeNormal ) );
}
vec3 linePlaneIntersect( in vec3 pointOnLine, in vec3 lineDirection, in vec3 pointOnPlane, in vec3 planeNormal ) {
return lineDirection * ( dot( planeNormal, pointOnPlane - pointOnLine ) / dot( planeNormal, lineDirection ) ) + pointOnLine;
}
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;
}
float linearToRelativeLuminance( const in vec3 color ) {
vec3 weights = vec3( 0.2126, 0.7152, 0.0722 );
return dot( weights, color.rgb );
}
vec3 packNormalToRGB( const in vec3 normal ) {
return normalize( normal ) * 0.5 + 0.5;
}
vec3 unpackRGBToNormal( const in vec3 rgb ) {
return 2.0 * rgb.xyz - 1.0;
}
const float PackUpscale = 256. / 255.;const float UnpackDownscale = 255. / 256.;
const vec3 PackFactors = vec3( 256. * 256. * 256., 256. * 256., 256. );
const vec4 UnpackFactors = UnpackDownscale / vec4( PackFactors, 1. );
const float ShiftRight8 = 1. / 256.;
vec4 packDepthToRGBA( const in float v ) {
vec4 r = vec4( fract( v * PackFactors ), v );
r.yzw -= r.xyz * ShiftRight8; return r * PackUpscale;
}
float unpackRGBAToDepth( const in vec4 v ) {
return dot( v, UnpackFactors );
}
float viewZToOrthographicDepth( const in float viewZ, const in float near, const in float far ) {
return ( viewZ + near ) / ( near - far );
}
float orthographicDepthToViewZ( const in float linearClipZ, const in float near, const in float far ) {
return linearClipZ * ( near - far ) - near;
}
float viewZToPerspectiveDepth( const in float viewZ, const in float near, const in float far ) {
return (( near + viewZ ) * far ) / (( far - near ) * viewZ );
}
float perspectiveDepthToViewZ( const in float invClipZ, const in float near, const in float far ) {
return ( near * far ) / ( ( far - near ) * invClipZ - far );
}
#if defined( DITHERING )
vec3 dithering( vec3 color ) {
float grid_position = rand( gl_FragCoord.xy );
vec3 dither_shift_RGB = vec3( 0.25 / 255.0, -0.25 / 255.0, 0.25 / 255.0 );
dither_shift_RGB = mix( 2.0 * dither_shift_RGB, -2.0 * dither_shift_RGB, grid_position );
return color + dither_shift_RGB;
}
#endif
#ifdef USE_COLOR
varying vec3 vColor;
#endif
#if defined( USE_MAP ) || defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( USE_SPECULARMAP ) || defined( USE_ALPHAMAP ) || defined( USE_EMISSIVEMAP ) || defined( USE_ROUGHNESSMAP ) || defined( USE_METALNESSMAP )
varying vec2 vUv;
#endif
#if defined( USE_LIGHTMAP ) || defined( USE_AOMAP )
varying vec2 vUv2;
#endif
#ifdef USE_MAP
uniform sampler2D map;
#endif
#ifdef USE_ALPHAMAP
uniform sampler2D alphaMap;
#endif
#ifdef USE_AOMAP
uniform sampler2D aoMap;
uniform float aoMapIntensity;
#endif
#ifdef USE_LIGHTMAP
uniform sampler2D lightMap;
uniform float lightMapIntensity;
#endif
#ifdef USE_EMISSIVEMAP
uniform sampler2D emissiveMap;
#endif
#if defined( USE_ENVMAP ) || defined( PHYSICAL )
uniform float reflectivity;
uniform float envMapIntensity;
#endif
#ifdef USE_ENVMAP
#if ! defined( PHYSICAL ) && ( defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( PHONG ) )
varying vec3 vWorldPosition;
#endif
#ifdef ENVMAP_TYPE_CUBE
uniform samplerCube envMap;
#else
uniform sampler2D envMap;
#endif
uniform float flipEnvMap;
uniform int maxMipLevel;
#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( PHONG ) || defined( PHYSICAL )
uniform float refractionRatio;
#else
varying vec3 vReflect;
#endif
#endif
#ifdef TOON
uniform sampler2D gradientMap;
vec3 getGradientIrradiance( vec3 normal, vec3 lightDirection ) {
float dotNL = dot( normal, lightDirection );
vec2 coord = vec2( dotNL * 0.5 + 0.5, 0.0 );
#ifdef USE_GRADIENTMAP
return texture2D( gradientMap, coord ).rgb;
#else
return ( coord.x < 0.7 ) ? vec3( 0.7 ) : vec3( 1.0 );
#endif
}
#endif
#ifdef USE_FOG
uniform vec3 fogColor;
varying float fogDepth;
#ifdef FOG_EXP2
uniform float fogDensity;
#else
uniform float fogNear;
uniform float fogFar;
#endif
#endif
vec2 integrateSpecularBRDF( const in float dotNV, const in float roughness ) {
const vec4 c0 = vec4( - 1, - 0.0275, - 0.572, 0.022 );
const vec4 c1 = vec4( 1, 0.0425, 1.04, - 0.04 );
vec4 r = roughness * c0 + c1;
float a004 = min( r.x * r.x, exp2( - 9.28 * dotNV ) ) * r.x + r.y;
return vec2( -1.04, 1.04 ) * a004 + r.zw;
}
float punctualLightIntensityToIrradianceFactor( const in float lightDistance, const in float cutoffDistance, const in float decayExponent ) {
#if defined ( PHYSICALLY_CORRECT_LIGHTS )
float distanceFalloff = 1.0 / max( pow( lightDistance, decayExponent ), 0.01 );
if( cutoffDistance > 0.0 ) {
distanceFalloff *= pow2( saturate( 1.0 - pow4( lightDistance / cutoffDistance ) ) );
}
return distanceFalloff;
#else
if( cutoffDistance > 0.0 && decayExponent > 0.0 ) {
return pow( saturate( -lightDistance / cutoffDistance + 1.0 ), decayExponent );
}
return 1.0;
#endif
}
vec3 BRDF_Diffuse_Lambert( const in vec3 diffuseColor ) {
return RECIPROCAL_PI * diffuseColor;
}
vec3 F_Schlick( const in vec3 specularColor, const in float dotLH ) {
float fresnel = exp2( ( -5.55473 * dotLH - 6.98316 ) * dotLH );
return ( 1.0 - specularColor ) * fresnel + specularColor;
}
float G_GGX_Smith( const in float alpha, const in float dotNL, const in float dotNV ) {
float a2 = pow2( alpha );
float gl = dotNL + sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNL ) );
float gv = dotNV + sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNV ) );
return 1.0 / ( gl * gv );
}
float G_GGX_SmithCorrelated( const in float alpha, const in float dotNL, const in float dotNV ) {
float a2 = pow2( alpha );
float gv = dotNL * sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNV ) );
float gl = dotNV * sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNL ) );
return 0.5 / max( gv + gl, EPSILON );
}
float D_GGX( const in float alpha, const in float dotNH ) {
float a2 = pow2( alpha );
float denom = pow2( dotNH ) * ( a2 - 1.0 ) + 1.0;
return RECIPROCAL_PI * a2 / pow2( denom );
}
vec3 BRDF_Specular_GGX( const in IncidentLight incidentLight, const in GeometricContext geometry, const in vec3 specularColor, const in float roughness ) {
float alpha = pow2( roughness );
vec3 halfDir = normalize( incidentLight.direction + geometry.viewDir );
float dotNL = saturate( dot( geometry.normal, incidentLight.direction ) );
float dotNV = saturate( dot( geometry.normal, geometry.viewDir ) );
float dotNH = saturate( dot( geometry.normal, halfDir ) );
float dotLH = saturate( dot( incidentLight.direction, halfDir ) );
vec3 F = F_Schlick( specularColor, dotLH );
float G = G_GGX_SmithCorrelated( alpha, dotNL, dotNV );
float D = D_GGX( alpha, dotNH );
return F * ( G * D );
}
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;
}
vec3 LTC_Evaluate( const in vec3 N, const in vec3 V, const in vec3 P, const in mat3 mInv, const in vec3 rectCoords[ 4 ] ) {
vec3 v1 = rectCoords[ 1 ] - rectCoords[ 0 ];
vec3 v2 = rectCoords[ 3 ] - rectCoords[ 0 ];
vec3 lightNormal = cross( v1, v2 );
if( dot( lightNormal, P - rectCoords[ 0 ] ) < 0.0 ) return vec3( 0.0 );
vec3 T1, T2;
T1 = normalize( V - N * dot( V, N ) );
T2 = - cross( N, T1 );
mat3 mat = mInv * transposeMat3( mat3( T1, T2, N ) );
vec3 coords[ 4 ];
coords[ 0 ] = mat * ( rectCoords[ 0 ] - P );
coords[ 1 ] = mat * ( rectCoords[ 1 ] - P );
coords[ 2 ] = mat * ( rectCoords[ 2 ] - P );
coords[ 3 ] = mat * ( rectCoords[ 3 ] - 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 vec3( result );
}
vec3 BRDF_Specular_GGX_Environment( const in GeometricContext geometry, const in vec3 specularColor, const in float roughness ) {
float dotNV = saturate( dot( geometry.normal, geometry.viewDir ) );
vec2 brdf = integrateSpecularBRDF( dotNV, roughness );
return specularColor * brdf.x + brdf.y;
}
void BRDF_Specular_Multiscattering_Environment( const in GeometricContext geometry, const in vec3 specularColor, const in float roughness, inout vec3 singleScatter, inout vec3 multiScatter ) {
float dotNV = saturate( dot( geometry.normal, geometry.viewDir ) );
vec3 F = F_Schlick( specularColor, dotNV );
vec2 brdf = integrateSpecularBRDF( dotNV, roughness );
vec3 FssEss = F * brdf.x + brdf.y;
float Ess = brdf.x + brdf.y;
float Ems = 1.0 - Ess;
vec3 Favg = specularColor + ( 1.0 - specularColor ) * 0.047619; vec3 Fms = FssEss * Favg / ( 1.0 - Ems * Favg );
singleScatter += FssEss;
multiScatter += Fms * Ems;
}
float G_BlinnPhong_Implicit( ) {
return 0.25;
}
float D_BlinnPhong( const in float shininess, const in float dotNH ) {
return RECIPROCAL_PI * ( shininess * 0.5 + 1.0 ) * pow( dotNH, shininess );
}
vec3 BRDF_Specular_BlinnPhong( const in IncidentLight incidentLight, const in GeometricContext geometry, const in vec3 specularColor, const in float shininess ) {
vec3 halfDir = normalize( incidentLight.direction + geometry.viewDir );
float dotNH = saturate( dot( geometry.normal, halfDir ) );
float dotLH = saturate( dot( incidentLight.direction, halfDir ) );
vec3 F = F_Schlick( specularColor, dotLH );
float G = G_BlinnPhong_Implicit( );
float D = D_BlinnPhong( shininess, dotNH );
return F * ( G * D );
}
float GGXRoughnessToBlinnExponent( const in float ggxRoughness ) {
return ( 2.0 / pow2( ggxRoughness + 0.0001 ) - 2.0 );
}
float BlinnExponentToGGXRoughness( const in float blinnExponent ) {
return sqrt( 2.0 / ( blinnExponent + 2.0 ) );
}
uniform vec3 ambientLightColor;
vec3 getAmbientLightIrradiance( const in vec3 ambientLightColor ) {
vec3 irradiance = ambientLightColor;
#ifndef PHYSICALLY_CORRECT_LIGHTS
irradiance *= PI;
#endif
return irradiance;
}
#if 1 > 0
struct DirectionalLight {
vec3 direction;
vec3 color;
int shadow;
float shadowBias;
float shadowRadius;
vec2 shadowMapSize;
};
uniform DirectionalLight directionalLights[ 1 ];
void getDirectionalDirectLightIrradiance( const in DirectionalLight directionalLight, const in GeometricContext geometry, out IncidentLight directLight ) {
directLight.color = directionalLight.color;
directLight.direction = directionalLight.direction;
directLight.visible = true;
}
#endif
#if 0 > 0
struct PointLight {
vec3 position;
vec3 color;
float distance;
float decay;
int shadow;
float shadowBias;
float shadowRadius;
vec2 shadowMapSize;
float shadowCameraNear;
float shadowCameraFar;
};
uniform PointLight pointLights[ 0 ];
void getPointDirectLightIrradiance( const in PointLight pointLight, const in GeometricContext geometry, out IncidentLight directLight ) {
vec3 lVector = pointLight.position - geometry.position;
directLight.direction = normalize( lVector );
float lightDistance = length( lVector );
directLight.color = pointLight.color;
directLight.color *= punctualLightIntensityToIrradianceFactor( lightDistance, pointLight.distance, pointLight.decay );
directLight.visible = ( directLight.color != vec3( 0.0 ) );
}
#endif
#if 0 > 0
struct SpotLight {
vec3 position;
vec3 direction;
vec3 color;
float distance;
float decay;
float coneCos;
float penumbraCos;
int shadow;
float shadowBias;
float shadowRadius;
vec2 shadowMapSize;
};
uniform SpotLight spotLights[ 0 ];
void getSpotDirectLightIrradiance( const in SpotLight spotLight, const in GeometricContext geometry, out IncidentLight directLight ) {
vec3 lVector = spotLight.position - geometry.position;
directLight.direction = normalize( lVector );
float lightDistance = length( lVector );
float angleCos = dot( directLight.direction, spotLight.direction );
if ( angleCos > spotLight.coneCos ) {
float spotEffect = smoothstep( spotLight.coneCos, spotLight.penumbraCos, angleCos );
directLight.color = spotLight.color;
directLight.color *= spotEffect * punctualLightIntensityToIrradianceFactor( lightDistance, spotLight.distance, spotLight.decay );
directLight.visible = true;
} else {
directLight.color = vec3( 0.0 );
directLight.visible = false;
}
}
#endif
#if 0 > 0
struct RectAreaLight {
vec3 color;
vec3 position;
vec3 halfWidth;
vec3 halfHeight;
};
uniform sampler2D ltc_1; uniform sampler2D ltc_2;
uniform RectAreaLight rectAreaLights[ 0 ];
#endif
#if 0 > 0
struct HemisphereLight {
vec3 direction;
vec3 skyColor;
vec3 groundColor;
};
uniform HemisphereLight hemisphereLights[ 0 ];
vec3 getHemisphereLightIrradiance( const in HemisphereLight hemiLight, const in GeometricContext geometry ) {
float dotNL = dot( geometry.normal, hemiLight.direction );
float hemiDiffuseWeight = 0.5 * dotNL + 0.5;
vec3 irradiance = mix( hemiLight.groundColor, hemiLight.skyColor, hemiDiffuseWeight );
#ifndef PHYSICALLY_CORRECT_LIGHTS
irradiance *= PI;
#endif
return irradiance;
}
#endif
varying vec3 vViewPosition;
#ifndef FLAT_SHADED
varying vec3 vNormal;
#endif
struct BlinnPhongMaterial {
vec3 diffuseColor;
vec3 specularColor;
float specularShininess;
float specularStrength;
};
void RE_Direct_BlinnPhong( const in IncidentLight directLight, const in GeometricContext geometry, const in BlinnPhongMaterial material, inout ReflectedLight reflectedLight ) {
#ifdef TOON
vec3 irradiance = getGradientIrradiance( geometry.normal, directLight.direction ) * directLight.color;
#else
float dotNL = saturate( dot( geometry.normal, directLight.direction ) );
vec3 irradiance = dotNL * directLight.color;
#endif
#ifndef PHYSICALLY_CORRECT_LIGHTS
irradiance *= PI;
#endif
reflectedLight.directDiffuse += irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );
reflectedLight.directSpecular += irradiance * BRDF_Specular_BlinnPhong( directLight, geometry, material.specularColor, material.specularShininess ) * material.specularStrength;
}
void RE_IndirectDiffuse_BlinnPhong( const in vec3 irradiance, const in GeometricContext geometry, const in BlinnPhongMaterial material, inout ReflectedLight reflectedLight ) {
reflectedLight.indirectDiffuse += irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );
}
#define RE_Direct RE_Direct_BlinnPhong
#define RE_IndirectDiffuse RE_IndirectDiffuse_BlinnPhong
#define Material_LightProbeLOD( material ) (0)
#ifdef USE_SHADOWMAP
#if 1 > 0
uniform sampler2D directionalShadowMap[ 1 ];
varying vec4 vDirectionalShadowCoord[ 1 ];
#endif
#if 0 > 0
uniform sampler2D spotShadowMap[ 0 ];
varying vec4 vSpotShadowCoord[ 0 ];
#endif
#if 0 > 0
uniform sampler2D pointShadowMap[ 0 ];
varying vec4 vPointShadowCoord[ 0 ];
#endif
float texture2DCompare( sampler2D depths, vec2 uv, float compare ) {
return step( compare, unpackRGBAToDepth( texture2D( depths, uv ) ) );
}
float texture2DShadowLerp( sampler2D depths, vec2 size, vec2 uv, float compare ) {
const vec2 offset = vec2( 0.0, 1.0 );
vec2 texelSize = vec2( 1.0 ) / size;
vec2 centroidUV = floor( uv * size + 0.5 ) / size;
float lb = texture2DCompare( depths, centroidUV + texelSize * offset.xx, compare );
float lt = texture2DCompare( depths, centroidUV + texelSize * offset.xy, compare );
float rb = texture2DCompare( depths, centroidUV + texelSize * offset.yx, compare );
float rt = texture2DCompare( depths, centroidUV + texelSize * offset.yy, compare );
vec2 f = fract( uv * size + 0.5 );
float a = mix( lb, lt, f.y );
float b = mix( rb, rt, f.y );
float c = mix( a, b, f.x );
return c;
}
float getShadow( sampler2D shadowMap, vec2 shadowMapSize, float shadowBias, float shadowRadius, vec4 shadowCoord ) {
float shadow = 1.0;
shadowCoord.xyz /= shadowCoord.w;
shadowCoord.z += shadowBias;
bvec4 inFrustumVec = bvec4 ( shadowCoord.x >= 0.0, shadowCoord.x <= 1.0, shadowCoord.y >= 0.0, shadowCoord.y <= 1.0 );
bool inFrustum = all( inFrustumVec );
bvec2 frustumTestVec = bvec2( inFrustum, shadowCoord.z <= 1.0 );
bool frustumTest = all( frustumTestVec );
if ( frustumTest ) {
#if defined( SHADOWMAP_TYPE_PCF )
vec2 texelSize = vec2( 1.0 ) / shadowMapSize;
float dx0 = - texelSize.x * shadowRadius;
float dy0 = - texelSize.y * shadowRadius;
float dx1 = + texelSize.x * shadowRadius;
float dy1 = + texelSize.y * shadowRadius;
shadow = (
texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, dy0 ), shadowCoord.z ) +
texture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy0 ), shadowCoord.z ) +
texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, dy0 ), shadowCoord.z ) +
texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, 0.0 ), shadowCoord.z ) +
texture2DCompare( shadowMap, shadowCoord.xy, shadowCoord.z ) +
texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, 0.0 ), shadowCoord.z ) +
texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, dy1 ), shadowCoord.z ) +
texture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy1 ), shadowCoord.z ) +
texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, dy1 ), shadowCoord.z )
) * ( 1.0 / 9.0 );
#elif defined( SHADOWMAP_TYPE_PCF_SOFT )
vec2 texelSize = vec2( 1.0 ) / shadowMapSize;
float dx0 = - texelSize.x * shadowRadius;
float dy0 = - texelSize.y * shadowRadius;
float dx1 = + texelSize.x * shadowRadius;
float dy1 = + texelSize.y * shadowRadius;
shadow = (
texture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy + vec2( dx0, dy0 ), shadowCoord.z ) +
texture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy + vec2( 0.0, dy0 ), shadowCoord.z ) +
texture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy + vec2( dx1, dy0 ), shadowCoord.z ) +
texture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy + vec2( dx0, 0.0 ), shadowCoord.z ) +
texture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy, shadowCoord.z ) +
texture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy + vec2( dx1, 0.0 ), shadowCoord.z ) +
texture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy + vec2( dx0, dy1 ), shadowCoord.z ) +
texture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy + vec2( 0.0, dy1 ), shadowCoord.z ) +
texture2DShadowLerp( shadowMap, shadowMapSize, shadowCoord.xy + vec2( dx1, dy1 ), shadowCoord.z )
) * ( 1.0 / 9.0 );
#else
shadow = texture2DCompare( shadowMap, shadowCoord.xy, shadowCoord.z );
#endif
}
return shadow;
}
vec2 cubeToUV( vec3 v, float texelSizeY ) {
vec3 absV = abs( v );
float scaleToCube = 1.0 / max( absV.x, max( absV.y, absV.z ) );
absV *= scaleToCube;
v *= scaleToCube * ( 1.0 - 2.0 * texelSizeY );
vec2 planar = v.xy;
float almostATexel = 1.5 * texelSizeY;
float almostOne = 1.0 - almostATexel;
if ( absV.z >= almostOne ) {
if ( v.z > 0.0 )
planar.x = 4.0 - v.x;
} else if ( absV.x >= almostOne ) {
float signX = sign( v.x );
planar.x = v.z * signX + 2.0 * signX;
} else if ( absV.y >= almostOne ) {
float signY = sign( v.y );
planar.x = v.x + 2.0 * signY + 2.0;
planar.y = v.z * signY - 2.0;
}
return vec2( 0.125, 0.25 ) * planar + vec2( 0.375, 0.75 );
}
float getPointShadow( sampler2D shadowMap, vec2 shadowMapSize, float shadowBias, float shadowRadius, vec4 shadowCoord, float shadowCameraNear, float shadowCameraFar ) {
vec2 texelSize = vec2( 1.0 ) / ( shadowMapSize * vec2( 4.0, 2.0 ) );
vec3 lightToPosition = shadowCoord.xyz;
float dp = ( length( lightToPosition ) - shadowCameraNear ) / ( shadowCameraFar - shadowCameraNear ); dp += shadowBias;
vec3 bd3D = normalize( lightToPosition );
#if defined( SHADOWMAP_TYPE_PCF ) || defined( SHADOWMAP_TYPE_PCF_SOFT )
vec2 offset = vec2( - 1, 1 ) * shadowRadius * texelSize.y;
return (
texture2DCompare( shadowMap, cubeToUV( bd3D + offset.xyy, texelSize.y ), dp ) +
texture2DCompare( shadowMap, cubeToUV( bd3D + offset.yyy, texelSize.y ), dp ) +
texture2DCompare( shadowMap, cubeToUV( bd3D + offset.xyx, texelSize.y ), dp ) +
texture2DCompare( shadowMap, cubeToUV( bd3D + offset.yyx, texelSize.y ), dp ) +
texture2DCompare( shadowMap, cubeToUV( bd3D, texelSize.y ), dp ) +
texture2DCompare( shadowMap, cubeToUV( bd3D + offset.xxy, texelSize.y ), dp ) +
texture2DCompare( shadowMap, cubeToUV( bd3D + offset.yxy, texelSize.y ), dp ) +
texture2DCompare( shadowMap, cubeToUV( bd3D + offset.xxx, texelSize.y ), dp ) +
texture2DCompare( shadowMap, cubeToUV( bd3D + offset.yxx, texelSize.y ), dp )
) * ( 1.0 / 9.0 );
#else
return texture2DCompare( shadowMap, cubeToUV( bd3D, texelSize.y ), dp );
#endif
}
#endif
#ifdef USE_SHADOWMAP
uniform sampler2D shadowColorMap;
// Copied and modified from "THREE.ShaderChunk.shadowmap_pars_fragment" in r102.1
vec3 texture2DCompareWithColor( sampler2D depths, sampler2D shadowColorMap, vec2 uv, float compare ) {
return texture2DCompare( depths, uv, compare ) == 1.0 ? vec3( 1.0, 1.0, 1.0 ) : texture2D( shadowColorMap, uv ).rgb;
}
vec3 texture2DLerpWithColor( sampler2D depths, sampler2D shadowColorMap, vec2 size, vec2 uv, float compare ) {
const vec2 offset = vec2( 0.0, 1.0 );
vec2 texelSize = vec2( 1.0 ) / size;
vec2 centroidUV = floor( uv * size + 0.5 ) / size;
vec3 lb = texture2DCompareWithColor( depths, shadowColorMap, centroidUV + texelSize * offset.xx, compare );
vec3 lt = texture2DCompareWithColor( depths, shadowColorMap, centroidUV + texelSize * offset.xy, compare );
vec3 rb = texture2DCompareWithColor( depths, shadowColorMap, centroidUV + texelSize * offset.yx, compare );
vec3 rt = texture2DCompareWithColor( depths, shadowColorMap, centroidUV + texelSize * offset.yy, compare );
vec2 f = fract( uv * size + 0.5 );
vec3 a = mix( lb, lt, f.y );
vec3 b = mix( rb, rt, f.y );
vec3 c = mix( a, b, f.x );
return c;
}
vec3 getShadowWithColor( sampler2D shadowMap, sampler2D shadowColorMap, vec2 shadowMapSize, float shadowBias, float shadowRadius, vec4 shadowCoord ) {
vec3 shadow = vec3( 1.0, 1.0, 1.0 );
shadowCoord.xyz /= shadowCoord.w;
shadowCoord.z += shadowBias;
bvec4 inFrustumVec = bvec4 ( shadowCoord.x >= 0.0, shadowCoord.x <= 1.0, shadowCoord.y >= 0.0, shadowCoord.y <= 1.0 );
bool inFrustum = all( inFrustumVec );
bvec2 frustumTestVec = bvec2( inFrustum, shadowCoord.z <= 1.0 );
bool frustumTest = all( frustumTestVec );
if ( frustumTest ) {
#if defined( SHADOWMAP_TYPE_PCF )
vec2 texelSize = vec2( 1.0 ) / shadowMapSize;
float dx0 = - texelSize.x * shadowRadius;
float dy0 = - texelSize.y * shadowRadius;
float dx1 = + texelSize.x * shadowRadius;
float dy1 = + texelSize.y * shadowRadius;
shadow = (
texture2DCompareWithColor( shadowMap, shadowColorMap, shadowCoord.xy + vec2( dx0, dy0 ), shadowCoord.z ) +
texture2DCompareWithColor( shadowMap, shadowColorMap, shadowCoord.xy + vec2( 0.0, dy0 ), shadowCoord.z ) +
texture2DCompareWithColor( shadowMap, shadowColorMap, shadowCoord.xy + vec2( dx1, dy0 ), shadowCoord.z ) +
texture2DCompareWithColor( shadowMap, shadowColorMap, shadowCoord.xy + vec2( dx0, 0.0 ), shadowCoord.z )+
texture2DCompareWithColor( shadowMap, shadowColorMap, shadowCoord.xy, shadowCoord.z ) +
texture2DCompareWithColor( shadowMap, shadowColorMap, shadowCoord.xy + vec2( dx1, 0.0 ), shadowCoord.z ) +
texture2DCompareWithColor( shadowMap, shadowColorMap, shadowCoord.xy + vec2( dx0, dy1 ), shadowCoord.z ) +
texture2DCompareWithColor( shadowMap, shadowColorMap, shadowCoord.xy + vec2( 0.0, dy1 ), shadowCoord.z ) +
texture2DCompareWithColor( shadowMap, shadowColorMap, shadowCoord.xy + vec2( dx1, dy1 ), shadowCoord.z )
) * ( 1.0 / 9.0 );
#elif defined( SHADOWMAP_TYPE_PCF_SOFT )
vec2 texelSize = vec2( 1.0 ) / shadowMapSize;
float dx0 = - texelSize.x * shadowRadius;
float dy0 = - texelSize.y * shadowRadius;
float dx1 = + texelSize.x * shadowRadius;
float dy1 = + texelSize.y * shadowRadius;
shadow = (
texture2DLerpWithColor( shadowMap, shadowColorMap, shadowMapSize, shadowCoord.xy + vec2( dx0, dy0 ), shadowCoord.z ) +
texture2DLerpWithColor( shadowMap, shadowColorMap, shadowMapSize, shadowCoord.xy + vec2( 0.0, dy0 ), shadowCoord.z ) +
texture2DLerpWithColor( shadowMap, shadowColorMap, shadowMapSize, shadowCoord.xy + vec2( dx1, dy0 ), shadowCoord.z ) +
texture2DLerpWithColor( shadowMap, shadowColorMap, shadowMapSize, shadowCoord.xy + vec2( dx0, 0.0 ), shadowCoord.z ) +
texture2DLerpWithColor( shadowMap, shadowColorMap, shadowMapSize, shadowCoord.xy, shadowCoord.z ) +
texture2DLerpWithColor( shadowMap, shadowColorMap, shadowMapSize, shadowCoord.xy + vec2( dx1, 0.0 ), shadowCoord.z ) +
texture2DLerpWithColor( shadowMap, shadowColorMap, shadowMapSize, shadowCoord.xy + vec2( dx0, dy1 ), shadowCoord.z ) +
texture2DLerpWithColor( shadowMap, shadowColorMap, shadowMapSize, shadowCoord.xy + vec2( 0.0, dy1 ), shadowCoord.z ) +
texture2DLerpWithColor( shadowMap, shadowColorMap, shadowMapSize, shadowCoord.xy + vec2( dx1, dy1 ), shadowCoord.z )
) * ( 1.0 / 9.0 );
#else
shadow = texture2DCompareWithColor( shadowMap, shadowColorMap, shadowCoord.xy, shadowCoord.z ) * texture2D( shadowColorMap, shadowCoord.xy );
#endif
}
return shadow;
}
#endif
#ifdef USE_BUMPMAP
uniform sampler2D bumpMap;
uniform float bumpScale;
vec2 dHdxy_fwd() {
vec2 dSTdx = dFdx( vUv );
vec2 dSTdy = dFdy( vUv );
float Hll = bumpScale * texture2D( bumpMap, vUv ).x;
float dBx = bumpScale * texture2D( bumpMap, vUv + dSTdx ).x - Hll;
float dBy = bumpScale * texture2D( bumpMap, vUv + dSTdy ).x - Hll;
return vec2( dBx, dBy );
}
vec3 perturbNormalArb( vec3 surf_pos, vec3 surf_norm, vec2 dHdxy ) {
vec3 vSigmaX = vec3( dFdx( surf_pos.x ), dFdx( surf_pos.y ), dFdx( surf_pos.z ) );
vec3 vSigmaY = vec3( dFdy( surf_pos.x ), dFdy( surf_pos.y ), dFdy( surf_pos.z ) );
vec3 vN = surf_norm;
vec3 R1 = cross( vSigmaY, vN );
vec3 R2 = cross( vN, vSigmaX );
float fDet = dot( vSigmaX, R1 );
fDet *= ( float( gl_FrontFacing ) * 2.0 - 1.0 );
vec3 vGrad = sign( fDet ) * ( dHdxy.x * R1 + dHdxy.y * R2 );
return normalize( abs( fDet ) * surf_norm - vGrad );
}
#endif
#ifdef USE_NORMALMAP
uniform sampler2D normalMap;
uniform vec2 normalScale;
#ifdef OBJECTSPACE_NORMALMAP
uniform mat3 normalMatrix;
#else
vec3 perturbNormal2Arb( vec3 eye_pos, vec3 surf_norm ) {
vec3 q0 = vec3( dFdx( eye_pos.x ), dFdx( eye_pos.y ), dFdx( eye_pos.z ) );
vec3 q1 = vec3( dFdy( eye_pos.x ), dFdy( eye_pos.y ), dFdy( eye_pos.z ) );
vec2 st0 = dFdx( vUv.st );
vec2 st1 = dFdy( vUv.st );
float scale = sign( st1.t * st0.s - st0.t * st1.s );
vec3 S = normalize( ( q0 * st1.t - q1 * st0.t ) * scale );
vec3 T = normalize( ( - q0 * st1.s + q1 * st0.s ) * scale );
vec3 N = normalize( surf_norm );
mat3 tsn = mat3( S, T, N );
vec3 mapN = texture2D( normalMap, vUv ).xyz * 2.0 - 1.0;
mapN.xy *= normalScale;
mapN.xy *= ( float( gl_FrontFacing ) * 2.0 - 1.0 );
return normalize( tsn * mapN );
}
#endif
#endif
#ifdef USE_SPECULARMAP
uniform sampler2D specularMap;
#endif
#if defined( USE_LOGDEPTHBUF ) && defined( USE_LOGDEPTHBUF_EXT )
uniform float logDepthBufFC;
varying float vFragDepth;
#endif
#if 0 > 0
#if ! defined( PHYSICAL ) && ! defined( PHONG ) && ! defined( MATCAP )
varying vec3 vViewPosition;
#endif
uniform vec4 clippingPlanes[ 0 ];
#endif
void
main() {
#if ENABLE_DITHER_TRANSPARENCY
//if( texture2D( ditherTex, gl_FragCoord.xy / 4.0 ).r > opacity ) discard;
if( ( bayerDither4x4( floor( mod( gl_FragCoord.xy, 4.0 ) ) ) ) / 16.0 >= opacity ) discard;
#endif
#if 0 > 0
vec4 plane;
#if 0 < 0
bool clipped = true;
if ( clipped ) discard;
#endif
#endif
vec4 diffuseColor = vec4( diffuse, opacity );
ReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );
vec3 totalEmissiveRadiance = emissive;
#if defined( USE_LOGDEPTHBUF ) && defined( USE_LOGDEPTHBUF_EXT )
gl_FragDepthEXT = log2( vFragDepth ) * logDepthBufFC * 0.5;
#endif
#ifdef USE_MAP
vec4 texelColor = texture2D( map, vUv );
texelColor = mapTexelToLinear( texelColor );
diffuseColor *= texelColor;
#endif
#ifdef USE_COLOR
diffuseColor.rgb *= vColor;
#endif
#ifdef USE_ALPHAMAP
diffuseColor.a *= texture2D( alphaMap, vUv ).g;
#endif
#ifdef ALPHATEST
if ( diffuseColor.a < ALPHATEST ) discard;
#endif
float specularStrength;
#ifdef USE_SPECULARMAP
vec4 texelSpecular = texture2D( specularMap, vUv );
specularStrength = texelSpecular.r;
#else
specularStrength = 1.0;
#endif
#ifdef FLAT_SHADED
vec3 fdx = vec3( dFdx( vViewPosition.x ), dFdx( vViewPosition.y ), dFdx( vViewPosition.z ) );
vec3 fdy = vec3( dFdy( vViewPosition.x ), dFdy( vViewPosition.y ), dFdy( vViewPosition.z ) );
vec3 normal = normalize( cross( fdx, fdy ) );
#else
vec3 normal = normalize( vNormal );
#ifdef DOUBLE_SIDED
normal = normal * ( float( gl_FrontFacing ) * 2.0 - 1.0 );
#endif
#ifdef USE_TANGENT
vec3 tangent = normalize( vTangent );
vec3 bitangent = normalize( vBitangent );
#ifdef DOUBLE_SIDED
tangent = tangent * ( float( gl_FrontFacing ) * 2.0 - 1.0 );
bitangent = bitangent * ( float( gl_FrontFacing ) * 2.0 - 1.0 );
#endif
#endif
#endif
#ifdef USE_NORMALMAP
#ifdef OBJECTSPACE_NORMALMAP
normal = texture2D( normalMap, vUv ).xyz * 2.0 - 1.0;
#ifdef FLIP_SIDED
normal = - normal;
#endif
#ifdef DOUBLE_SIDED
normal = normal * ( float( gl_FrontFacing ) * 2.0 - 1.0 );
#endif
normal = normalize( normalMatrix * normal );
#else
#ifdef USE_TANGENT
mat3 vTBN = mat3( tangent, bitangent, normal );
vec3 mapN = texture2D( normalMap, vUv ).xyz * 2.0 - 1.0;
mapN.xy = normalScale * mapN.xy;
normal = normalize( vTBN * mapN );
#else
normal = perturbNormal2Arb( -vViewPosition, normal );
#endif
#endif
#elif defined( USE_BUMPMAP )
normal = perturbNormalArb( -vViewPosition, normal, dHdxy_fwd() );
#endif
#ifdef USE_EMISSIVEMAP
vec4 emissiveColor = texture2D( emissiveMap, vUv );
emissiveColor.rgb = emissiveMapTexelToLinear( emissiveColor ).rgb;
totalEmissiveRadiance *= emissiveColor.rgb;
#endif
BlinnPhongMaterial material;
material.diffuseColor = diffuseColor.rgb;
material.specularColor = specular;
material.specularShininess = shininess;
material.specularStrength = specularStrength;
GeometricContext geometry;
geometry.position = - vViewPosition;
geometry.normal = normal;
geometry.viewDir = normalize( vViewPosition );
IncidentLight directLight;
#if ( 0 > 0 ) && defined( RE_Direct )
PointLight pointLight;
#endif
#if ( 0 > 0 ) && defined( RE_Direct )
SpotLight spotLight;
#endif
#if ( 1 > 0 ) && defined( RE_Direct )
DirectionalLight directionalLight;
directionalLight = directionalLights[ 0 ];
getDirectionalDirectLightIrradiance( directionalLight, geometry, directLight );
#ifdef USE_SHADOWMAP
directLight.color *=
all( bvec2( directionalLight.shadow, directLight.visible ) ) ?
(
getShadow( directionalShadowMap[ 0 ], directionalLight.shadowMapSize, directionalLight.shadowBias, directionalLight.shadowRadius, vDirectionalShadowCoord[ 0 ] )
) * getShadowWithColor( directionalShadowMap[ 0 ], shadowColorMap, directionalLight.shadowMapSize, directionalLight.shadowBias, directionalLight.shadowRadius, vDirectionalShadowCoord[ 0 ] ):
vec3( 1.0, 1.0, 1.0 );
#endif
RE_Direct( directLight, geometry, material, reflectedLight );
#endif
#if ( 0 > 0 ) && defined( RE_Direct_RectArea )
RectAreaLight rectAreaLight;
#endif
#if defined( RE_IndirectDiffuse )
vec3 irradiance = getAmbientLightIrradiance( ambientLightColor );
#if ( 0 > 0 )
#endif
#endif
#if defined( RE_IndirectSpecular )
vec3 radiance = vec3( 0.0 );
vec3 clearCoatRadiance = vec3( 0.0 );
#endif
#if defined( RE_IndirectDiffuse )
#ifdef USE_LIGHTMAP
vec3 lightMapIrradiance = texture2D( lightMap, vUv2 ).xyz * lightMapIntensity;
#ifndef PHYSICALLY_CORRECT_LIGHTS
lightMapIrradiance *= PI;
#endif
irradiance += lightMapIrradiance;
#endif
#if defined( USE_ENVMAP ) && defined( PHYSICAL ) && defined( ENVMAP_TYPE_CUBE_UV )
irradiance += getLightProbeIndirectIrradiance( geometry, maxMipLevel );
#endif
#endif
#if defined( USE_ENVMAP ) && defined( RE_IndirectSpecular )
radiance += getLightProbeIndirectRadiance( geometry, Material_BlinnShininessExponent( material ), maxMipLevel );
#ifndef STANDARD
clearCoatRadiance += getLightProbeIndirectRadiance( geometry, Material_ClearCoat_BlinnShininessExponent( material ), maxMipLevel );
#endif
#endif
#if defined( RE_IndirectDiffuse )
RE_IndirectDiffuse( irradiance, geometry, material, reflectedLight );
#endif
#if defined( RE_IndirectSpecular )
RE_IndirectSpecular( radiance, irradiance, clearCoatRadiance, geometry, material, reflectedLight );
#endif
#ifdef USE_AOMAP
float ambientOcclusion = ( texture2D( aoMap, vUv2 ).r - 1.0 ) * aoMapIntensity + 1.0;
reflectedLight.indirectDiffuse *= ambientOcclusion;
#if defined( USE_ENVMAP ) && defined( PHYSICAL )
float dotNV = saturate( dot( geometry.normal, geometry.viewDir ) );
reflectedLight.indirectSpecular *= computeSpecularOcclusion( dotNV, ambientOcclusion, material.specularRoughness );
#endif
#endif
vec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + reflectedLight.directSpecular + reflectedLight.indirectSpecular + totalEmissiveRadiance;
#ifdef USE_ENVMAP
#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( PHONG )
vec3 cameraToVertex = normalize( vWorldPosition - cameraPosition );
vec3 worldNormal = inverseTransformDirection( normal, viewMatrix );
#ifdef ENVMAP_MODE_REFLECTION
vec3 reflectVec = reflect( cameraToVertex, worldNormal );
#else
vec3 reflectVec = refract( cameraToVertex, worldNormal, refractionRatio );
#endif
#else
vec3 reflectVec = vReflect;
#endif
#ifdef ENVMAP_TYPE_CUBE
vec4 envColor = textureCube( envMap, vec3( flipEnvMap * reflectVec.x, reflectVec.yz ) );
#elif defined( ENVMAP_TYPE_EQUIREC )
vec2 sampleUV;
reflectVec = normalize( reflectVec );
sampleUV.y = asin( clamp( reflectVec.y, - 1.0, 1.0 ) ) * RECIPROCAL_PI + 0.5;
sampleUV.x = atan( reflectVec.z, reflectVec.x ) * RECIPROCAL_PI2 + 0.5;
vec4 envColor = texture2D( envMap, sampleUV );
#elif defined( ENVMAP_TYPE_SPHERE )
reflectVec = normalize( reflectVec );
vec3 reflectView = normalize( ( viewMatrix * vec4( reflectVec, 0.0 ) ).xyz + vec3( 0.0, 0.0, 1.0 ) );
vec4 envColor = texture2D( envMap, reflectView.xy * 0.5 + 0.5 );
#else
vec4 envColor = vec4( 0.0 );
#endif
envColor = envMapTexelToLinear( envColor );
#ifdef ENVMAP_BLENDING_MULTIPLY
outgoingLight = mix( outgoingLight, outgoingLight * envColor.xyz, specularStrength * reflectivity );
#elif defined( ENVMAP_BLENDING_MIX )
outgoingLight = mix( outgoingLight, envColor.xyz, specularStrength * reflectivity );
#elif defined( ENVMAP_BLENDING_ADD )
outgoingLight += envColor.xyz * specularStrength * reflectivity;
#endif
#endif
gl_FragColor = vec4( outgoingLight, diffuseColor.a );
#if defined( TONE_MAPPING )
gl_FragColor.rgb = toneMapping( gl_FragColor.rgb );
#endif
gl_FragColor = linearToOutputTexel( gl_FragColor );
#ifdef USE_FOG
#ifdef FOG_EXP2
float fogFactor = whiteCompliment( exp2( - fogDensity * fogDensity * fogDepth * fogDepth * LOG2 ) );
#else
float fogFactor = smoothstep( fogNear, fogFar, fogDepth );
#endif
gl_FragColor.rgb = mix( gl_FragColor.rgb, fogColor, fogFactor );
#endif
#ifdef PREMULTIPLIED_ALPHA
gl_FragColor.rgb *= gl_FragColor.a;
#endif
#if defined( DITHERING )
gl_FragColor.rgb = dithering( gl_FragColor.rgb );
#endif
}
`;
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