| 1 |
- {"ast":null,"code":"// Do not edit.\nimport { ShaderStore } from \"../../Engines/shaderStore.js\";\nconst name = \"pbrBRDFFunctions\";\nconst shader = `#define FRESNEL_MAXIMUM_ON_ROUGH 0.25\n#ifdef MS_BRDF_ENERGY_CONSERVATION\nfn getEnergyConservationFactor(specularEnvironmentR0: vec3f,environmentBrdf: vec3f)->vec3f {return 1.0+specularEnvironmentR0*(1.0/environmentBrdf.y-1.0);}\n#endif\n#ifdef ENVIRONMENTBRDF\nfn getBRDFLookup(NdotV: f32,perceptualRoughness: f32)->vec3f {var UV: vec2f= vec2f(NdotV,perceptualRoughness);var brdfLookup: vec4f= textureSample(environmentBrdfSampler,environmentBrdfSamplerSampler,UV);\n#ifdef ENVIRONMENTBRDF_RGBD\nbrdfLookup=vec4f(fromRGBD(brdfLookup.rgba),brdfLookup.a);\n#endif\nreturn brdfLookup.rgb;}\nfn getReflectanceFromBRDFWithEnvLookup(specularEnvironmentR0: vec3f,specularEnvironmentR90: vec3f,environmentBrdf: vec3f)->vec3f {\n#ifdef BRDF_V_HEIGHT_CORRELATED\nvar reflectance: vec3f=(specularEnvironmentR90-specularEnvironmentR0)*environmentBrdf.x+specularEnvironmentR0*environmentBrdf.y;\n#else\nvar reflectance: vec3f=specularEnvironmentR0*environmentBrdf.x+specularEnvironmentR90*environmentBrdf.y;\n#endif\nreturn reflectance;}\nfn getReflectanceFromBRDFLookup(specularEnvironmentR0: vec3f,environmentBrdf: vec3f)->vec3f {\n#ifdef BRDF_V_HEIGHT_CORRELATED\nvar reflectance: vec3f=mix(environmentBrdf.xxx,environmentBrdf.yyy,specularEnvironmentR0);\n#else\nvar reflectance: vec3f=specularEnvironmentR0*environmentBrdf.x+environmentBrdf.y;\n#endif\nreturn reflectance;}\n#endif\n/* NOT USED\n#if defined(SHEEN) && defined(SHEEN_SOFTER)\nfn getBRDFLookupCharlieSheen(NdotV: f32,perceptualRoughness: f32)->f32\n{var c: f32=1.0-NdotV;var c3: f32=c*c*c;return 0.65584461*c3+1.0/(4.16526551+exp(-7.97291361*perceptualRoughness+6.33516894));}\n#endif\n*/\n#if !defined(ENVIRONMENTBRDF) || defined(REFLECTIONMAP_SKYBOX) || defined(ALPHAFRESNEL)\nfn getReflectanceFromAnalyticalBRDFLookup_Jones(VdotN: f32,reflectance0: vec3f,reflectance90: vec3f,smoothness: f32)->vec3f\n{var weight: f32=mix(FRESNEL_MAXIMUM_ON_ROUGH,1.0,smoothness);return reflectance0+weight*(reflectance90-reflectance0)*pow5(saturate(1.0-VdotN));}\n#endif\n#if defined(SHEEN) && defined(ENVIRONMENTBRDF)\n/**\n* The sheen BRDF not containing F can be easily stored in the blue channel of the BRDF texture.\n* The blue channel contains DCharlie*VAshikhmin*NdotL as a lokkup table\n*/\nfn getSheenReflectanceFromBRDFLookup(reflectance0: vec3f,environmentBrdf: vec3f)->vec3f {var sheenEnvironmentReflectance: vec3f=reflectance0*environmentBrdf.b;return sheenEnvironmentReflectance;}\n#endif\nfn fresnelSchlickGGXVec3(VdotH: f32,reflectance0: vec3f,reflectance90: vec3f)->vec3f\n{return reflectance0+(reflectance90-reflectance0)*pow5(1.0-VdotH);}\nfn fresnelSchlickGGX(VdotH: f32,reflectance0: f32,reflectance90: f32)->f32\n{return reflectance0+(reflectance90-reflectance0)*pow5(1.0-VdotH);}\n#ifdef CLEARCOAT\nfn getR0RemappedForClearCoat(f0: vec3f)->vec3f {\n#ifdef CLEARCOAT_DEFAULTIOR\n#ifdef MOBILE\nreturn saturateVec3(f0*(f0*0.526868+0.529324)-0.0482256);\n#else\nreturn saturateVec3(f0*(f0*(0.941892-0.263008*f0)+0.346479)-0.0285998);\n#endif\n#else\nvar s: vec3f=sqrt(f0);var t: vec3f=(uniforms.vClearCoatRefractionParams.z+uniforms.vClearCoatRefractionParams.w*s)/(uniforms.vClearCoatRefractionParams.w+uniforms.vClearCoatRefractionParams.z*s);return squareVec3(t);\n#endif\n}\n#endif\n#ifdef IRIDESCENCE\nconst XYZ_TO_REC709: mat3x3f= mat3x3f(\n3.2404542,-0.9692660, 0.0556434,\n-1.5371385, 1.8760108,-0.2040259,\n-0.4985314, 0.0415560, 1.0572252\n);fn getIORTfromAirToSurfaceR0(f0: vec3f)->vec3f {var sqrtF0: vec3f=sqrt(f0);return (1.+sqrtF0)/(1.-sqrtF0);}\nfn getR0fromIORsVec3(iorT: vec3f,iorI: f32)->vec3f {return squareVec3((iorT- vec3f(iorI))/(iorT+ vec3f(iorI)));}\nfn getR0fromIORs(iorT: f32,iorI: f32)->f32 {return square((iorT-iorI)/(iorT+iorI));}\nfn evalSensitivity(opd: f32,shift: vec3f)->vec3f {var phase: f32=2.0*PI*opd*1.0e-9;const val: vec3f= vec3f(5.4856e-13,4.4201e-13,5.2481e-13);const pos: vec3f= vec3f(1.6810e+06,1.7953e+06,2.2084e+06);const vr: vec3f= vec3f(4.3278e+09,9.3046e+09,6.6121e+09);var xyz: vec3f=val*sqrt(2.0*PI*vr)*cos(pos*phase+shift)*exp(-square(phase)*vr);xyz.x+=9.7470e-14*sqrt(2.0*PI*4.5282e+09)*cos(2.2399e+06*phase+shift[0])*exp(-4.5282e+09*square(phase));xyz/=1.0685e-7;var srgb: vec3f=XYZ_TO_REC709*xyz;return srgb;}\nfn evalIridescence(outsideIOR: f32,eta2: f32,cosTheta1: f32,thinFilmThickness: f32,baseF0: vec3f)->vec3f {var I: vec3f= vec3f(1.0);var iridescenceIOR: f32=mix(outsideIOR,eta2,smoothstep(0.0,0.03,thinFilmThickness));var sinTheta2Sq: f32=square(outsideIOR/iridescenceIOR)*(1.0-square(cosTheta1));var cosTheta2Sq: f32=1.0-sinTheta2Sq;if (cosTheta2Sq<0.0) {return I;}\nvar cosTheta2: f32=sqrt(cosTheta2Sq);var R0: f32=getR0fromIORs(iridescenceIOR,outsideIOR);var R12: f32=fresnelSchlickGGX(cosTheta1,R0,1.);var R21: f32=R12;var T121: f32=1.0-R12;var phi12: f32=0.0;if (iridescenceIOR<outsideIOR) {phi12=PI;}\nvar phi21: f32=PI-phi12;var baseIOR: vec3f=getIORTfromAirToSurfaceR0(clamp(baseF0,vec3f(0.0),vec3f(0.9999))); \nvar R1: vec3f=getR0fromIORsVec3(baseIOR,iridescenceIOR);var R23: vec3f=fresnelSchlickGGXVec3(cosTheta2,R1, vec3f(1.));var phi23: vec3f= vec3f(0.0);if (baseIOR[0]<iridescenceIOR) {phi23[0]=PI;}\nif (baseIOR[1]<iridescenceIOR) {phi23[1]=PI;}\nif (baseIOR[2]<iridescenceIOR) {phi23[2]=PI;}\nvar opd: f32=2.0*iridescenceIOR*thinFilmThickness*cosTheta2;var phi: vec3f= vec3f(phi21)+phi23;var R123: vec3f=clamp(R12*R23,vec3f(1e-5),vec3f(0.9999));var r123: vec3f=sqrt(R123);var Rs: vec3f=(T121*T121)*R23/( vec3f(1.0)-R123);var C0: vec3f=R12+Rs;I=C0;var Cm: vec3f=Rs-T121;for (var m: i32=1; m<=2; m++)\n{Cm*=r123;var Sm: vec3f=2.0*evalSensitivity( f32(m)*opd, f32(m)*phi);I+=Cm*Sm;}\nreturn max(I, vec3f(0.0));}\n#endif\nfn normalDistributionFunction_TrowbridgeReitzGGX(NdotH: f32,alphaG: f32)->f32\n{var a2: f32=alphaG*alphaG;var d: f32=NdotH*NdotH*(a2-1.0)+1.0;return a2/(PI*d*d);}\n#ifdef SHEEN\nfn normalDistributionFunction_CharlieSheen(NdotH: f32,alphaG: f32)->f32\n{var invR: f32=1./alphaG;var cos2h: f32=NdotH*NdotH;var sin2h: f32=1.-cos2h;return (2.+invR)*pow(sin2h,invR*.5)/(2.*PI);}\n#endif\n#ifdef ANISOTROPIC\nfn normalDistributionFunction_BurleyGGX_Anisotropic(NdotH: f32,TdotH: f32,BdotH: f32,alphaTB: vec2f)->f32 {var a2: f32=alphaTB.x*alphaTB.y;var v: vec3f= vec3f(alphaTB.y*TdotH,alphaTB.x *BdotH,a2*NdotH);var v2: f32=dot(v,v);var w2: f32=a2/v2;return a2*w2*w2*RECIPROCAL_PI;}\n#endif\n#ifdef BRDF_V_HEIGHT_CORRELATED\nfn smithVisibility_GGXCorrelated(NdotL: f32,NdotV: f32,alphaG: f32)->f32 {\n#ifdef MOBILE\nvar GGXV: f32=NdotL*(NdotV*(1.0-alphaG)+alphaG);var GGXL: f32=NdotV*(NdotL*(1.0-alphaG)+alphaG);return 0.5/(GGXV+GGXL);\n#else\nvar a2: f32=alphaG*alphaG;var GGXV: f32=NdotL*sqrt(NdotV*(NdotV-a2*NdotV)+a2);var GGXL: f32=NdotV*sqrt(NdotL*(NdotL-a2*NdotL)+a2);return 0.5/(GGXV+GGXL);\n#endif\n}\n#else\nfn smithVisibilityG1_TrowbridgeReitzGGXFast(dot: f32,alphaG: f32)->f32\n{\n#ifdef MOBILE\nreturn 1.0/(dot+alphaG+(1.0-alphaG)*dot ));\n#else\nvar alphaSquared: f32=alphaG*alphaG;return 1.0/(dot+sqrt(alphaSquared+(1.0-alphaSquared)*dot*dot));\n#endif\n}\nfn smithVisibility_TrowbridgeReitzGGXFast(NdotL: f32,NdotV: f32,alphaG: f32)->f32\n{var visibility: f32=smithVisibilityG1_TrowbridgeReitzGGXFast(NdotL,alphaG)*smithVisibilityG1_TrowbridgeReitzGGXFast(NdotV,alphaG);return visibility;}\n#endif\n#ifdef ANISOTROPIC\nfn smithVisibility_GGXCorrelated_Anisotropic(NdotL: f32,NdotV: f32,TdotV: f32,BdotV: f32,TdotL: f32,BdotL: f32,alphaTB: vec2f)->f32 {var lambdaV: f32=NdotL*length( vec3f(alphaTB.x*TdotV,alphaTB.y*BdotV,NdotV));var lambdaL: f32=NdotV*length( vec3f(alphaTB.x*TdotL,alphaTB.y*BdotL,NdotL));var v: f32=0.5/(lambdaV+lambdaL);return v;}\n#endif\n#ifdef CLEARCOAT\nfn visibility_Kelemen(VdotH: f32)->f32 {return 0.25/(VdotH*VdotH); }\n#endif\n#ifdef SHEEN\nfn visibility_Ashikhmin(NdotL: f32,NdotV: f32)->f32\n{return 1./(4.*(NdotL+NdotV-NdotL*NdotV));}\n/* NOT USED\n#ifdef SHEEN_SOFTER\nfn l(x: f32,alphaG: f32)->f32\n{var oneMinusAlphaSq: f32=(1.0-alphaG)*(1.0-alphaG);var a: f32=mix(21.5473,25.3245,oneMinusAlphaSq);var b: f32=mix(3.82987,3.32435,oneMinusAlphaSq);var c: f32=mix(0.19823,0.16801,oneMinusAlphaSq);var d: f32=mix(-1.97760,-1.27393,oneMinusAlphaSq);var e: f32=mix(-4.32054,-4.85967,oneMinusAlphaSq);return a/(1.0+b*pow(x,c))+d*x+e;}\nfn lambdaSheen(cosTheta: f32,alphaG: f32)->f32\n{return abs(cosTheta)<0.5 ? exp(l(cosTheta,alphaG)) : exp(2.0*l(0.5,alphaG)-l(1.0-cosTheta,alphaG));}\nfn visibility_CharlieSheen(NdotL: f32,NdotV: f32,alphaG: f32)->f32\n{var G: f32=1.0/(1.0+lambdaSheen(NdotV,alphaG)+lambdaSheen(NdotL,alphaG));return G/(4.0*NdotV*NdotL);}\n#endif\n*/\n#endif\nfn diffuseBRDF_Burley(NdotL: f32,NdotV: f32,VdotH: f32,roughness: f32)->f32 {var diffuseFresnelNV: f32=pow5(saturateEps(1.0-NdotL));var diffuseFresnelNL: f32=pow5(saturateEps(1.0-NdotV));var diffuseFresnel90: f32=0.5+2.0*VdotH*VdotH*roughness;var fresnel: f32 =\n(1.0+(diffuseFresnel90-1.0)*diffuseFresnelNL) *\n(1.0+(diffuseFresnel90-1.0)*diffuseFresnelNV);return fresnel/PI;}\n#ifdef SS_TRANSLUCENCY\nfn transmittanceBRDF_Burley(tintColor: vec3f,diffusionDistance: vec3f,thickness: f32)->vec3f {var S: vec3f=1./maxEpsVec3(diffusionDistance);var temp: vec3f=exp((-0.333333333*thickness)*S);return tintColor.rgb*0.25*(temp*temp*temp+3.0*temp);}\nfn computeWrappedDiffuseNdotL(NdotL: f32,w: f32)->f32 {var t: f32=1.0+w;var invt2: f32=1.0/(t*t);return saturate((NdotL+w)*invt2);}\n#endif\n`;\n// Sideeffect\nShaderStore.IncludesShadersStoreWGSL[name] = shader;\n/** @internal */\nexport const pbrBRDFFunctionsWGSL = {\n name,\n shader\n};","map":{"version":3,"names":["ShaderStore","name","shader","IncludesShadersStoreWGSL","pbrBRDFFunctionsWGSL"],"sources":["F:/workspace/202226701027/huinongbao-app/node_modules/@babylonjs/core/ShadersWGSL/ShadersInclude/pbrBRDFFunctions.js"],"sourcesContent":["// Do not edit.\nimport { ShaderStore } from \"../../Engines/shaderStore.js\";\nconst name = \"pbrBRDFFunctions\";\nconst shader = `#define FRESNEL_MAXIMUM_ON_ROUGH 0.25\n#ifdef MS_BRDF_ENERGY_CONSERVATION\nfn getEnergyConservationFactor(specularEnvironmentR0: vec3f,environmentBrdf: vec3f)->vec3f {return 1.0+specularEnvironmentR0*(1.0/environmentBrdf.y-1.0);}\n#endif\n#ifdef ENVIRONMENTBRDF\nfn getBRDFLookup(NdotV: f32,perceptualRoughness: f32)->vec3f {var UV: vec2f= vec2f(NdotV,perceptualRoughness);var brdfLookup: vec4f= textureSample(environmentBrdfSampler,environmentBrdfSamplerSampler,UV);\n#ifdef ENVIRONMENTBRDF_RGBD\nbrdfLookup=vec4f(fromRGBD(brdfLookup.rgba),brdfLookup.a);\n#endif\nreturn brdfLookup.rgb;}\nfn getReflectanceFromBRDFWithEnvLookup(specularEnvironmentR0: vec3f,specularEnvironmentR90: vec3f,environmentBrdf: vec3f)->vec3f {\n#ifdef BRDF_V_HEIGHT_CORRELATED\nvar reflectance: vec3f=(specularEnvironmentR90-specularEnvironmentR0)*environmentBrdf.x+specularEnvironmentR0*environmentBrdf.y;\n#else\nvar reflectance: vec3f=specularEnvironmentR0*environmentBrdf.x+specularEnvironmentR90*environmentBrdf.y;\n#endif\nreturn reflectance;}\nfn getReflectanceFromBRDFLookup(specularEnvironmentR0: vec3f,environmentBrdf: vec3f)->vec3f {\n#ifdef BRDF_V_HEIGHT_CORRELATED\nvar reflectance: vec3f=mix(environmentBrdf.xxx,environmentBrdf.yyy,specularEnvironmentR0);\n#else\nvar reflectance: vec3f=specularEnvironmentR0*environmentBrdf.x+environmentBrdf.y;\n#endif\nreturn reflectance;}\n#endif\n/* NOT USED\n#if defined(SHEEN) && defined(SHEEN_SOFTER)\nfn getBRDFLookupCharlieSheen(NdotV: f32,perceptualRoughness: f32)->f32\n{var c: f32=1.0-NdotV;var c3: f32=c*c*c;return 0.65584461*c3+1.0/(4.16526551+exp(-7.97291361*perceptualRoughness+6.33516894));}\n#endif\n*/\n#if !defined(ENVIRONMENTBRDF) || defined(REFLECTIONMAP_SKYBOX) || defined(ALPHAFRESNEL)\nfn getReflectanceFromAnalyticalBRDFLookup_Jones(VdotN: f32,reflectance0: vec3f,reflectance90: vec3f,smoothness: f32)->vec3f\n{var weight: f32=mix(FRESNEL_MAXIMUM_ON_ROUGH,1.0,smoothness);return reflectance0+weight*(reflectance90-reflectance0)*pow5(saturate(1.0-VdotN));}\n#endif\n#if defined(SHEEN) && defined(ENVIRONMENTBRDF)\n/**\n* The sheen BRDF not containing F can be easily stored in the blue channel of the BRDF texture.\n* The blue channel contains DCharlie*VAshikhmin*NdotL as a lokkup table\n*/\nfn getSheenReflectanceFromBRDFLookup(reflectance0: vec3f,environmentBrdf: vec3f)->vec3f {var sheenEnvironmentReflectance: vec3f=reflectance0*environmentBrdf.b;return sheenEnvironmentReflectance;}\n#endif\nfn fresnelSchlickGGXVec3(VdotH: f32,reflectance0: vec3f,reflectance90: vec3f)->vec3f\n{return reflectance0+(reflectance90-reflectance0)*pow5(1.0-VdotH);}\nfn fresnelSchlickGGX(VdotH: f32,reflectance0: f32,reflectance90: f32)->f32\n{return reflectance0+(reflectance90-reflectance0)*pow5(1.0-VdotH);}\n#ifdef CLEARCOAT\nfn getR0RemappedForClearCoat(f0: vec3f)->vec3f {\n#ifdef CLEARCOAT_DEFAULTIOR\n#ifdef MOBILE\nreturn saturateVec3(f0*(f0*0.526868+0.529324)-0.0482256);\n#else\nreturn saturateVec3(f0*(f0*(0.941892-0.263008*f0)+0.346479)-0.0285998);\n#endif\n#else\nvar s: vec3f=sqrt(f0);var t: vec3f=(uniforms.vClearCoatRefractionParams.z+uniforms.vClearCoatRefractionParams.w*s)/(uniforms.vClearCoatRefractionParams.w+uniforms.vClearCoatRefractionParams.z*s);return squareVec3(t);\n#endif\n}\n#endif\n#ifdef IRIDESCENCE\nconst XYZ_TO_REC709: mat3x3f= mat3x3f(\n3.2404542,-0.9692660, 0.0556434,\n-1.5371385, 1.8760108,-0.2040259,\n-0.4985314, 0.0415560, 1.0572252\n);fn getIORTfromAirToSurfaceR0(f0: vec3f)->vec3f {var sqrtF0: vec3f=sqrt(f0);return (1.+sqrtF0)/(1.-sqrtF0);}\nfn getR0fromIORsVec3(iorT: vec3f,iorI: f32)->vec3f {return squareVec3((iorT- vec3f(iorI))/(iorT+ vec3f(iorI)));}\nfn getR0fromIORs(iorT: f32,iorI: f32)->f32 {return square((iorT-iorI)/(iorT+iorI));}\nfn evalSensitivity(opd: f32,shift: vec3f)->vec3f {var phase: f32=2.0*PI*opd*1.0e-9;const val: vec3f= vec3f(5.4856e-13,4.4201e-13,5.2481e-13);const pos: vec3f= vec3f(1.6810e+06,1.7953e+06,2.2084e+06);const vr: vec3f= vec3f(4.3278e+09,9.3046e+09,6.6121e+09);var xyz: vec3f=val*sqrt(2.0*PI*vr)*cos(pos*phase+shift)*exp(-square(phase)*vr);xyz.x+=9.7470e-14*sqrt(2.0*PI*4.5282e+09)*cos(2.2399e+06*phase+shift[0])*exp(-4.5282e+09*square(phase));xyz/=1.0685e-7;var srgb: vec3f=XYZ_TO_REC709*xyz;return srgb;}\nfn evalIridescence(outsideIOR: f32,eta2: f32,cosTheta1: f32,thinFilmThickness: f32,baseF0: vec3f)->vec3f {var I: vec3f= vec3f(1.0);var iridescenceIOR: f32=mix(outsideIOR,eta2,smoothstep(0.0,0.03,thinFilmThickness));var sinTheta2Sq: f32=square(outsideIOR/iridescenceIOR)*(1.0-square(cosTheta1));var cosTheta2Sq: f32=1.0-sinTheta2Sq;if (cosTheta2Sq<0.0) {return I;}\nvar cosTheta2: f32=sqrt(cosTheta2Sq);var R0: f32=getR0fromIORs(iridescenceIOR,outsideIOR);var R12: f32=fresnelSchlickGGX(cosTheta1,R0,1.);var R21: f32=R12;var T121: f32=1.0-R12;var phi12: f32=0.0;if (iridescenceIOR<outsideIOR) {phi12=PI;}\nvar phi21: f32=PI-phi12;var baseIOR: vec3f=getIORTfromAirToSurfaceR0(clamp(baseF0,vec3f(0.0),vec3f(0.9999))); \nvar R1: vec3f=getR0fromIORsVec3(baseIOR,iridescenceIOR);var R23: vec3f=fresnelSchlickGGXVec3(cosTheta2,R1, vec3f(1.));var phi23: vec3f= vec3f(0.0);if (baseIOR[0]<iridescenceIOR) {phi23[0]=PI;}\nif (baseIOR[1]<iridescenceIOR) {phi23[1]=PI;}\nif (baseIOR[2]<iridescenceIOR) {phi23[2]=PI;}\nvar opd: f32=2.0*iridescenceIOR*thinFilmThickness*cosTheta2;var phi: vec3f= vec3f(phi21)+phi23;var R123: vec3f=clamp(R12*R23,vec3f(1e-5),vec3f(0.9999));var r123: vec3f=sqrt(R123);var Rs: vec3f=(T121*T121)*R23/( vec3f(1.0)-R123);var C0: vec3f=R12+Rs;I=C0;var Cm: vec3f=Rs-T121;for (var m: i32=1; m<=2; m++)\n{Cm*=r123;var Sm: vec3f=2.0*evalSensitivity( f32(m)*opd, f32(m)*phi);I+=Cm*Sm;}\nreturn max(I, vec3f(0.0));}\n#endif\nfn normalDistributionFunction_TrowbridgeReitzGGX(NdotH: f32,alphaG: f32)->f32\n{var a2: f32=alphaG*alphaG;var d: f32=NdotH*NdotH*(a2-1.0)+1.0;return a2/(PI*d*d);}\n#ifdef SHEEN\nfn normalDistributionFunction_CharlieSheen(NdotH: f32,alphaG: f32)->f32\n{var invR: f32=1./alphaG;var cos2h: f32=NdotH*NdotH;var sin2h: f32=1.-cos2h;return (2.+invR)*pow(sin2h,invR*.5)/(2.*PI);}\n#endif\n#ifdef ANISOTROPIC\nfn normalDistributionFunction_BurleyGGX_Anisotropic(NdotH: f32,TdotH: f32,BdotH: f32,alphaTB: vec2f)->f32 {var a2: f32=alphaTB.x*alphaTB.y;var v: vec3f= vec3f(alphaTB.y*TdotH,alphaTB.x *BdotH,a2*NdotH);var v2: f32=dot(v,v);var w2: f32=a2/v2;return a2*w2*w2*RECIPROCAL_PI;}\n#endif\n#ifdef BRDF_V_HEIGHT_CORRELATED\nfn smithVisibility_GGXCorrelated(NdotL: f32,NdotV: f32,alphaG: f32)->f32 {\n#ifdef MOBILE\nvar GGXV: f32=NdotL*(NdotV*(1.0-alphaG)+alphaG);var GGXL: f32=NdotV*(NdotL*(1.0-alphaG)+alphaG);return 0.5/(GGXV+GGXL);\n#else\nvar a2: f32=alphaG*alphaG;var GGXV: f32=NdotL*sqrt(NdotV*(NdotV-a2*NdotV)+a2);var GGXL: f32=NdotV*sqrt(NdotL*(NdotL-a2*NdotL)+a2);return 0.5/(GGXV+GGXL);\n#endif\n}\n#else\nfn smithVisibilityG1_TrowbridgeReitzGGXFast(dot: f32,alphaG: f32)->f32\n{\n#ifdef MOBILE\nreturn 1.0/(dot+alphaG+(1.0-alphaG)*dot ));\n#else\nvar alphaSquared: f32=alphaG*alphaG;return 1.0/(dot+sqrt(alphaSquared+(1.0-alphaSquared)*dot*dot));\n#endif\n}\nfn smithVisibility_TrowbridgeReitzGGXFast(NdotL: f32,NdotV: f32,alphaG: f32)->f32\n{var visibility: f32=smithVisibilityG1_TrowbridgeReitzGGXFast(NdotL,alphaG)*smithVisibilityG1_TrowbridgeReitzGGXFast(NdotV,alphaG);return visibility;}\n#endif\n#ifdef ANISOTROPIC\nfn smithVisibility_GGXCorrelated_Anisotropic(NdotL: f32,NdotV: f32,TdotV: f32,BdotV: f32,TdotL: f32,BdotL: f32,alphaTB: vec2f)->f32 {var lambdaV: f32=NdotL*length( vec3f(alphaTB.x*TdotV,alphaTB.y*BdotV,NdotV));var lambdaL: f32=NdotV*length( vec3f(alphaTB.x*TdotL,alphaTB.y*BdotL,NdotL));var v: f32=0.5/(lambdaV+lambdaL);return v;}\n#endif\n#ifdef CLEARCOAT\nfn visibility_Kelemen(VdotH: f32)->f32 {return 0.25/(VdotH*VdotH); }\n#endif\n#ifdef SHEEN\nfn visibility_Ashikhmin(NdotL: f32,NdotV: f32)->f32\n{return 1./(4.*(NdotL+NdotV-NdotL*NdotV));}\n/* NOT USED\n#ifdef SHEEN_SOFTER\nfn l(x: f32,alphaG: f32)->f32\n{var oneMinusAlphaSq: f32=(1.0-alphaG)*(1.0-alphaG);var a: f32=mix(21.5473,25.3245,oneMinusAlphaSq);var b: f32=mix(3.82987,3.32435,oneMinusAlphaSq);var c: f32=mix(0.19823,0.16801,oneMinusAlphaSq);var d: f32=mix(-1.97760,-1.27393,oneMinusAlphaSq);var e: f32=mix(-4.32054,-4.85967,oneMinusAlphaSq);return a/(1.0+b*pow(x,c))+d*x+e;}\nfn lambdaSheen(cosTheta: f32,alphaG: f32)->f32\n{return abs(cosTheta)<0.5 ? exp(l(cosTheta,alphaG)) : exp(2.0*l(0.5,alphaG)-l(1.0-cosTheta,alphaG));}\nfn visibility_CharlieSheen(NdotL: f32,NdotV: f32,alphaG: f32)->f32\n{var G: f32=1.0/(1.0+lambdaSheen(NdotV,alphaG)+lambdaSheen(NdotL,alphaG));return G/(4.0*NdotV*NdotL);}\n#endif\n*/\n#endif\nfn diffuseBRDF_Burley(NdotL: f32,NdotV: f32,VdotH: f32,roughness: f32)->f32 {var diffuseFresnelNV: f32=pow5(saturateEps(1.0-NdotL));var diffuseFresnelNL: f32=pow5(saturateEps(1.0-NdotV));var diffuseFresnel90: f32=0.5+2.0*VdotH*VdotH*roughness;var fresnel: f32 =\n(1.0+(diffuseFresnel90-1.0)*diffuseFresnelNL) *\n(1.0+(diffuseFresnel90-1.0)*diffuseFresnelNV);return fresnel/PI;}\n#ifdef SS_TRANSLUCENCY\nfn transmittanceBRDF_Burley(tintColor: vec3f,diffusionDistance: vec3f,thickness: f32)->vec3f {var S: vec3f=1./maxEpsVec3(diffusionDistance);var temp: vec3f=exp((-0.333333333*thickness)*S);return tintColor.rgb*0.25*(temp*temp*temp+3.0*temp);}\nfn computeWrappedDiffuseNdotL(NdotL: f32,w: f32)->f32 {var t: f32=1.0+w;var invt2: f32=1.0/(t*t);return saturate((NdotL+w)*invt2);}\n#endif\n`;\n// Sideeffect\nShaderStore.IncludesShadersStoreWGSL[name] = shader;\n/** @internal */\nexport const pbrBRDFFunctionsWGSL = { name, shader 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