// Do not edit. import { ShaderStore } from "../../Engines/shaderStore.js"; const name = "pbrHelperFunctions"; const shader = `#define MINIMUMVARIANCE 0.0005 float convertRoughnessToAverageSlope(float roughness) {return square(roughness)+MINIMUMVARIANCE;} float fresnelGrazingReflectance(float reflectance0) {float reflectance90=saturate(reflectance0*25.0);return reflectance90;} vec2 getAARoughnessFactors(vec3 normalVector) { #ifdef SPECULARAA vec3 nDfdx=dFdx(normalVector.xyz);vec3 nDfdy=dFdy(normalVector.xyz);float slopeSquare=max(dot(nDfdx,nDfdx),dot(nDfdy,nDfdy));float geometricRoughnessFactor=pow(saturate(slopeSquare),0.333);float geometricAlphaGFactor=sqrt(slopeSquare);geometricAlphaGFactor*=0.75;return vec2(geometricRoughnessFactor,geometricAlphaGFactor); #else return vec2(0.); #endif } #ifdef ANISOTROPIC #ifdef ANISOTROPIC_LEGACY vec2 getAnisotropicRoughness(float alphaG,float anisotropy) {float alphaT=max(alphaG*(1.0+anisotropy),MINIMUMVARIANCE);float alphaB=max(alphaG*(1.0-anisotropy),MINIMUMVARIANCE);return vec2(alphaT,alphaB);} vec3 getAnisotropicBentNormals(const vec3 T,const vec3 B,const vec3 N,const vec3 V,float anisotropy,float roughness) {vec3 anisotropicFrameDirection=anisotropy>=0.0 ? B : T;vec3 anisotropicFrameTangent=cross(normalize(anisotropicFrameDirection),V);vec3 anisotropicFrameNormal=cross(anisotropicFrameTangent,anisotropicFrameDirection);vec3 anisotropicNormal=normalize(mix(N,anisotropicFrameNormal,abs(anisotropy)));return anisotropicNormal;} #else vec2 getAnisotropicRoughness(float alphaG,float anisotropy) {float alphaT=max(mix(alphaG,1.0,anisotropy*anisotropy),MINIMUMVARIANCE);float alphaB=max(alphaG,MINIMUMVARIANCE);return vec2(alphaT,alphaB);} vec3 getAnisotropicBentNormals(const vec3 T,const vec3 B,const vec3 N,const vec3 V,float anisotropy,float roughness) {vec3 bentNormal=cross(B,V);bentNormal=normalize(cross(bentNormal,B));float a=square(square(1.0-anisotropy*(1.0-roughness)));bentNormal=normalize(mix(bentNormal,N,a));return bentNormal;} #endif #endif #if defined(CLEARCOAT) || defined(SS_REFRACTION) vec3 cocaLambert(vec3 alpha,float distance) {return exp(-alpha*distance);} vec3 cocaLambert(float NdotVRefract,float NdotLRefract,vec3 alpha,float thickness) {return cocaLambert(alpha,(thickness*((NdotLRefract+NdotVRefract)/(NdotLRefract*NdotVRefract))));} vec3 computeColorAtDistanceInMedia(vec3 color,float distance) {return -log(color)/distance;} vec3 computeClearCoatAbsorption(float NdotVRefract,float NdotLRefract,vec3 clearCoatColor,float clearCoatThickness,float clearCoatIntensity) {vec3 clearCoatAbsorption=mix(vec3(1.0), cocaLambert(NdotVRefract,NdotLRefract,clearCoatColor,clearCoatThickness), clearCoatIntensity);return clearCoatAbsorption;} #endif #ifdef MICROSURFACEAUTOMATIC float computeDefaultMicroSurface(float microSurface,vec3 reflectivityColor) {const float kReflectivityNoAlphaWorkflow_SmoothnessMax=0.95;float reflectivityLuminance=getLuminance(reflectivityColor);float reflectivityLuma=sqrt(reflectivityLuminance);microSurface=reflectivityLuma*kReflectivityNoAlphaWorkflow_SmoothnessMax;return microSurface;} #endif `; // Sideeffect ShaderStore.IncludesShadersStore[name] = shader; /** @internal */ export const pbrHelperFunctions = { name, shader }; //# sourceMappingURL=pbrHelperFunctions.js.map