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

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// Do not edit.
import { ShaderStore } from "../../Engines/shaderStore.js";
const name = "openpbrIblFunctions";
const shader = `#ifdef REFLECTION
fn sampleIrradiance(
surfaceNormal: vec3f
#if defined(NORMAL) && defined(USESPHERICALINVERTEX)
,vEnvironmentIrradianceSH: vec3f
#endif
#if (defined(USESPHERICALFROMREFLECTIONMAP) && (!defined(NORMAL) || !defined(USESPHERICALINVERTEX))) || (defined(USEIRRADIANCEMAP) && defined(REFLECTIONMAP_3D))
,iblMatrix: mat4x4f
#endif
#ifdef USEIRRADIANCEMAP
#ifdef REFLECTIONMAP_3D
,irradianceSampler: texture_cube<f32>
,irradianceSamplerSampler: sampler
#else
,irradianceSampler: texture_2d<f32>
,irradianceSamplerSampler: sampler
#endif
#ifdef USE_IRRADIANCE_DOMINANT_DIRECTION
,reflectionDominantDirection: vec3f
#endif
#endif
#ifdef REALTIME_FILTERING
,reflectionFilteringInfo: vec2f
#ifdef IBL_CDF_FILTERING
,icdfSampler: texture_2d<f32>
,icdfSamplerSampler: sampler
#endif
#endif
,reflectionInfos: vec2f
,viewDirectionW: vec3f
,diffuseRoughness: f32
,surfaceAlbedo: vec3f
)->vec3f {var environmentIrradiance=vec3f(0.,0.,0.);
#if (defined(USESPHERICALFROMREFLECTIONMAP) && (!defined(NORMAL) || !defined(USESPHERICALINVERTEX))) || (defined(USEIRRADIANCEMAP) && defined(REFLECTIONMAP_3D))
var irradianceVector=(iblMatrix*vec4f(surfaceNormal,0.0f)).xyz;let irradianceView=(iblMatrix*vec4f(viewDirectionW,0.0f)).xyz;
#if !defined(USE_IRRADIANCE_DOMINANT_DIRECTION) && !defined(REALTIME_FILTERING)
#if BASE_DIFFUSE_MODEL != BRDF_DIFFUSE_MODEL_LAMBERT && BASE_DIFFUSE_MODEL != BRDF_DIFFUSE_MODEL_LEGACY
{let NdotV=max(dot(surfaceNormal,viewDirectionW),0.0f);irradianceVector=mix(irradianceVector,irradianceView,(0.5f*(1.0f-NdotV))*diffuseRoughness);}
#endif
#endif
#ifdef REFLECTIONMAP_OPPOSITEZ
irradianceVector.z*=-1.0f;
#endif
#ifdef INVERTCUBICMAP
irradianceVector.y*=-1.0f;
#endif
#endif
#ifdef USESPHERICALFROMREFLECTIONMAP
#if defined(NORMAL) && defined(USESPHERICALINVERTEX)
environmentIrradiance=vEnvironmentIrradianceSH;
#else
#if defined(REALTIME_FILTERING)
environmentIrradiance=irradiance(reflectionSampler,reflectionSamplerSampler,irradianceVector,reflectionFilteringInfo,diffuseRoughness,surfaceAlbedo,irradianceView
#ifdef IBL_CDF_FILTERING
,icdfSampler
,icdfSamplerSampler
#endif
);
#else
environmentIrradiance=computeEnvironmentIrradiance(irradianceVector);
#endif
#endif
#elif defined(USEIRRADIANCEMAP)
#ifdef REFLECTIONMAP_3D
let environmentIrradianceFromTexture: vec4f=textureSample(irradianceSampler,irradianceSamplerSampler,irradianceVector);
#else
let environmentIrradianceFromTexture: vec4f=textureSample(irradianceSampler,irradianceSamplerSampler,reflectionCoords);
#endif
environmentIrradiance=environmentIrradianceFromTexture.rgb;
#ifdef RGBDREFLECTION
environmentIrradiance.rgb=fromRGBD(environmentIrradianceFromTexture);
#endif
#ifdef GAMMAREFLECTION
environmentIrradiance.rgb=toLinearSpace(environmentIrradiance.rgb);
#endif
#ifdef USE_IRRADIANCE_DOMINANT_DIRECTION
let Ls: vec3f=normalize(reflectionDominantDirection);let NoL: f32=dot(irradianceVector,Ls);let NoV: f32=dot(irradianceVector,irradianceView);var diffuseRoughnessTerm=vec3f(1.0f);
#if BASE_DIFFUSE_MODEL==BRDF_DIFFUSE_MODEL_EON
let LoV: f32=dot (Ls,irradianceView);let mag: f32=length(reflectionDominantDirection)*2.0f;let clampedAlbedo: vec3f=clamp(surfaceAlbedo,vec3f(0.1f),vec3f(1.0f));diffuseRoughnessTerm=diffuseBRDF_EON(clampedAlbedo,diffuseRoughness,NoL,NoV,LoV)*PI;diffuseRoughnessTerm=diffuseRoughnessTerm/clampedAlbedo;diffuseRoughnessTerm=mix(vec3f(1.0f),diffuseRoughnessTerm,sqrt(clamp(mag*NoV,0.0f,1.0f)));
#elif BASE_DIFFUSE_MODEL==BRDF_DIFFUSE_MODEL_BURLEY
let H: vec3f=(irradianceView+Ls)*0.5f;let VoH: f32=dot(irradianceView,H);diffuseRoughnessTerm=vec3f(diffuseBRDF_Burley(NoL,NoV,VoH,diffuseRoughness)*PI);
#endif
environmentIrradiance=environmentIrradiance.rgb*diffuseRoughnessTerm;
#endif
#endif
environmentIrradiance*=reflectionInfos.x;return environmentIrradiance;}
#ifdef REFLECTIONMAP_3D
fn createReflectionCoords(vPositionW: vec3f,normalW: vec3f)->vec3f
#else
fn createReflectionCoords(vPositionW: vec3f,normalW: vec3f)->vec2f
#endif
{var reflectionVector: vec3f=computeReflectionCoords(vec4f(vPositionW,1.0f),normalW);
#ifdef REFLECTIONMAP_OPPOSITEZ
reflectionVector.z*=-1.0;
#endif
#ifdef REFLECTIONMAP_3D
var reflectionCoords: vec3f=reflectionVector;
#else
var reflectionCoords: vec2f=reflectionVector.xy;
#ifdef REFLECTIONMAP_PROJECTION
reflectionCoords/=reflectionVector.z;
#endif
reflectionCoords.y=1.0f-reflectionCoords.y;
#endif
return reflectionCoords;}
fn sampleRadiance(
alphaG: f32
,reflectionMicrosurfaceInfos: vec3f
,reflectionInfos: vec2f
,geoInfo: geometryInfoOutParams
#ifdef REFLECTIONMAP_3D
,reflectionSampler: texture_cube<f32>
,reflectionSamplerSampler: sampler
,reflectionCoords: vec3f
#else
,reflectionSampler: texture_2d<f32>
,reflectionSamplerSampler: sampler
,reflectionCoords: vec2f
#endif
#ifdef REALTIME_FILTERING
,reflectionFilteringInfo: vec2f
#endif
)->vec3f {var environmentRadiance: vec4f=vec4f(0.f,0.f,0.f,0.f);
#if defined(LODINREFLECTIONALPHA) && !defined(REFLECTIONMAP_SKYBOX)
var reflectionLOD: f32=getLodFromAlphaG(reflectionMicrosurfaceInfos.x,alphaG,geoInfo.NdotVUnclamped);
#elif defined(LINEARSPECULARREFLECTION)
var reflectionLOD: f32=getLinearLodFromRoughness(reflectionMicrosurfaceInfos.x,roughness);
#else
var reflectionLOD: f32=getLodFromAlphaG(reflectionMicrosurfaceInfos.x,alphaG);
#endif
reflectionLOD=reflectionLOD*reflectionMicrosurfaceInfos.y+reflectionMicrosurfaceInfos.z;
#ifdef REALTIME_FILTERING
environmentRadiance=vec4f(radiance(alphaG,reflectionSampler,reflectionSamplerSampler,reflectionCoords,reflectionFilteringInfo),1.0f);
#else
environmentRadiance=textureSampleLevel(reflectionSampler,reflectionSamplerSampler,reflectionCoords,reflectionLOD);
#endif
#ifdef RGBDREFLECTION
environmentRadiance.rgb=fromRGBD(environmentRadiance);
#endif
#ifdef GAMMAREFLECTION
environmentRadiance.rgb=toLinearSpace(environmentRadiance.rgb);
#endif
environmentRadiance=vec4f(environmentRadiance.rgb*reflectionInfos.x,environmentRadiance.a);return environmentRadiance.rgb;}
#if defined(ANISOTROPIC)
fn sampleRadianceAnisotropic(
alphaG: f32
,reflectionMicrosurfaceInfos: vec3f
,reflectionInfos: vec2f
,geoInfo: geometryInfoAnisoOutParams
,normalW: vec3f
,viewDirectionW: vec3f
,positionW: vec3f
,noise: vec3f
,isRefraction: bool
,ior: f32
#ifdef REFLECTIONMAP_3D
,reflectionSampler: texture_cube<f32>
,reflectionSamplerSampler: sampler
#else
,reflectionSampler: texture_2d<f32>
,reflectionSamplerSampler: sampler
#endif
#ifdef REALTIME_FILTERING
,reflectionFilteringInfo: vec2f
#endif
)->vec3f {var environmentRadiance: vec4f=vec4f(0.f,0.f,0.f,0.f);let alphaT=alphaG*sqrt(2.0f/(1.0f+(1.0f-geoInfo.anisotropy)*(1.0f-geoInfo.anisotropy)));let alphaB=(1.0f-geoInfo.anisotropy)*alphaT;let modifiedAlphaG=alphaB;
#if defined(LODINREFLECTIONALPHA) && !defined(REFLECTIONMAP_SKYBOX)
var reflectionLOD: f32=getLodFromAlphaG(reflectionMicrosurfaceInfos.x,modifiedAlphaG,geoInfo.NdotVUnclamped);
#elif defined(LINEARSPECULARREFLECTION)
var reflectionLOD: f32=getLinearLodFromRoughness(reflectionMicrosurfaceInfos.x,roughness);
#else
var reflectionLOD: f32=getLodFromAlphaG(reflectionMicrosurfaceInfos.x,modifiedAlphaG);
#endif
reflectionLOD=reflectionLOD*reflectionMicrosurfaceInfos.y+reflectionMicrosurfaceInfos.z;
#ifdef REALTIME_FILTERING
var view=(uniforms.reflectionMatrix*vec4f(viewDirectionW,0.0f)).xyz;var tangent=(uniforms.reflectionMatrix*vec4f(geoInfo.anisotropicTangent,0.0f)).xyz;var bitangent=(uniforms.reflectionMatrix*vec4f(geoInfo.anisotropicBitangent,0.0f)).xyz;var normal=(uniforms.reflectionMatrix*vec4f(normalW,0.0f)).xyz;
#ifdef REFLECTIONMAP_OPPOSITEZ
view.z*=-1.0f;tangent.z*=-1.0f;bitangent.z*=-1.0f;normal.z*=-1.0f;
#endif
environmentRadiance =
vec4f(radianceAnisotropic(alphaT,alphaB,reflectionSampler,reflectionSamplerSampler,
view,tangent,
bitangent,normal,
reflectionFilteringInfo,noise.xy,isRefraction,ior),
1.0f);
#else
const samples: i32=16;var radianceSample=vec4f(0.0);var accumulatedRadiance=vec3f(0.0);var reflectionCoords=vec3f(0.0);var sample_weight=0.0f;var total_weight=0.0f;let step=1.0f/f32(max(samples-1,1));for (var i: i32=0; i<samples; i++) {var t: f32=mix(-1.0,1.0,f32(i)*step);t+=step*2.0*noise.x;sample_weight=max(1.0-abs(t),0.001);sample_weight*=sample_weight;t*=min(4.0*alphaT*geoInfo.anisotropy,1.0);var bentNormal: vec3f;if (t<0.0) {let blend: f32=t+1.0;bentNormal=normalize(mix(-geoInfo.anisotropicTangent,normalW,blend));} else if (t>0.0) {let blend: f32=t;bentNormal=normalize(mix(normalW,geoInfo.anisotropicTangent,blend));} else {bentNormal=normalW;}
if (isRefraction) {reflectionCoords=double_refract(-viewDirectionW,bentNormal,ior);} else {reflectionCoords=reflect(-viewDirectionW,bentNormal);}
reflectionCoords=(uniforms.reflectionMatrix*vec4f(reflectionCoords,0.f)).xyz;
#ifdef REFLECTIONMAP_OPPOSITEZ
reflectionCoords.z*=-1.0f;
#endif
radianceSample=textureSampleLevel(reflectionSampler,reflectionSamplerSampler,reflectionCoords,reflectionLOD);
#ifdef RGBDREFLECTION
accumulatedRadiance+=vec3f(sample_weight)*fromRGBD(radianceSample);
#elif defined(GAMMAREFLECTION)
accumulatedRadiance+=vec3f(sample_weight)*toLinearSpace(radianceSample.rgb);
#else
accumulatedRadiance+=vec3f(sample_weight)*radianceSample.rgb;
#endif
total_weight+=sample_weight;}
environmentRadiance=vec4f(accumulatedRadiance/vec3f(total_weight),1.0f);
#endif
environmentRadiance=vec4f(environmentRadiance.rgb*reflectionInfos.xxx,environmentRadiance.a);return environmentRadiance.rgb;}
#endif
fn conductorIblFresnel(reflectance: ReflectanceParams,NdotV: f32,roughness: f32,environmentBrdf: vec3f)->vec3f
{
#if (CONDUCTOR_SPECULAR_MODEL==CONDUCTOR_SPECULAR_MODEL_OPENPBR)
let albedoF0: vec3f=mix(reflectance.coloredF0,pow(reflectance.coloredF0,vec3f(1.4f)),roughness);return getF82Specular(NdotV,albedoF0,reflectance.coloredF90,roughness);
#else
return getReflectanceFromBRDFLookup(reflectance.coloredF0,reflectance.coloredF90,environmentBrdf);
#endif
}
#endif
`;
// Sideeffect
if (!ShaderStore.IncludesShadersStoreWGSL[name]) {
    ShaderStore.IncludesShadersStoreWGSL[name] = shader;
}
/** @internal */
export const openpbrIblFunctionsWGSL = { name, shader };
//# sourceMappingURL=openpbrIblFunctions.js.map