@babylonjs/core/ShadersWGSL/ShadersInclude/pbrHelperFunctions.js

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// Do not edit.
import { ShaderStore } from "../../Engines/shaderStore.js";
const name = "pbrHelperFunctions";
const shader = `#define MINIMUMVARIANCE 0.0005
fn convertRoughnessToAverageSlope(roughness: f32)->f32
{return roughness*roughness+MINIMUMVARIANCE;}
fn fresnelGrazingReflectance(reflectance0: f32)->f32 {var reflectance90: f32=saturate(reflectance0*25.0);return reflectance90;}
fn getAARoughnessFactors(normalVector: vec3f)->vec2f {
#ifdef SPECULARAA
var nDfdx: vec3f=dpdx(normalVector.xyz);var nDfdy: vec3f=dpdy(normalVector.xyz);var slopeSquare: f32=max(dot(nDfdx,nDfdx),dot(nDfdy,nDfdy));var geometricRoughnessFactor: f32=pow(saturate(slopeSquare),0.333);var geometricAlphaGFactor: f32=sqrt(slopeSquare);geometricAlphaGFactor*=0.75;return vec2f(geometricRoughnessFactor,geometricAlphaGFactor);
#else
return vec2f(0.);
#endif
}
#ifdef ANISOTROPIC
#ifdef ANISOTROPIC_LEGACY
fn getAnisotropicRoughness(alphaG: f32,anisotropy: f32)->vec2f {var alphaT: f32=max(alphaG*(1.0+anisotropy),MINIMUMVARIANCE);var alphaB: f32=max(alphaG*(1.0-anisotropy),MINIMUMVARIANCE);return vec2f(alphaT,alphaB);}
fn getAnisotropicBentNormals(T: vec3f,B: vec3f,N: vec3f,V: vec3f,anisotropy: f32,roughness: f32)->vec3f {var anisotropicFrameDirection: vec3f=select(T,B,anisotropy>=0.0);var anisotropicFrameTangent: vec3f=cross(normalize(anisotropicFrameDirection),V);var anisotropicFrameNormal: vec3f=cross(anisotropicFrameTangent,anisotropicFrameDirection);var anisotropicNormal: vec3f=normalize(mix(N,anisotropicFrameNormal,abs(anisotropy)));return anisotropicNormal;}
#else
fn getAnisotropicRoughness(alphaG: f32,anisotropy: f32)->vec2f {var alphaT: f32=max(mix(alphaG,1.0,anisotropy*anisotropy),MINIMUMVARIANCE);var alphaB: f32=max(alphaG,MINIMUMVARIANCE);return vec2f(alphaT,alphaB);}
fn getAnisotropicBentNormals(T: vec3f,B: vec3f,N: vec3f,V: vec3f,anisotropy: f32,roughness: f32)->vec3f {var bentNormal: vec3f=cross(B,V);bentNormal=normalize(cross(bentNormal,B));var sq=1.0-anisotropy*(1.0-roughness);var a: f32=sq*sq*sq*sq;bentNormal=normalize(mix(bentNormal,N,a));return bentNormal;}
#endif
#endif
#if defined(CLEARCOAT) || defined(SS_REFRACTION)
fn cocaLambertVec3(alpha: vec3f,distance: f32)->vec3f {return exp(-alpha*distance);}
fn cocaLambert(NdotVRefract: f32,NdotLRefract: f32,alpha: vec3f,thickness: f32)->vec3f {return cocaLambertVec3(alpha,(thickness*((NdotLRefract+NdotVRefract)/(NdotLRefract*NdotVRefract))));}
fn computeColorAtDistanceInMedia(color: vec3f,distance: f32)->vec3f {return -log(color)/distance;}
fn computeClearCoatAbsorption(NdotVRefract: f32,NdotLRefract: f32,clearCoatColor: vec3f,clearCoatThickness: f32,clearCoatIntensity: f32)->vec3f {var clearCoatAbsorption: vec3f=mix( vec3f(1.0),
cocaLambert(NdotVRefract,NdotLRefract,clearCoatColor,clearCoatThickness),
clearCoatIntensity);return clearCoatAbsorption;}
#endif
#ifdef MICROSURFACEAUTOMATIC
fn computeDefaultMicroSurface(microSurface: f32,reflectivityColor: vec3f)->f32
{const kReflectivityNoAlphaWorkflow_SmoothnessMax: f32=0.95;var reflectivityLuminance: f32=getLuminance(reflectivityColor);var reflectivityLuma: f32=sqrt(reflectivityLuminance);var resultMicroSurface=reflectivityLuma*kReflectivityNoAlphaWorkflow_SmoothnessMax;return resultMicroSurface;}
#endif
`;
// Sideeffect
if (!ShaderStore.IncludesShadersStoreWGSL[name]) {
    ShaderStore.IncludesShadersStoreWGSL[name] = shader;
}
/** @internal */
export const pbrHelperFunctionsWGSL = { name, shader };
//# sourceMappingURL=pbrHelperFunctions.js.map