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

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// Do not edit.
import { ShaderStore } from "../../Engines/shaderStore.js";
import "./ltcHelperFunctions.js";
import "./clusteredLightingFunctions.js";
const name = "lightsFragmentFunctions";
const shader = `struct lightingInfo
{diffuse: vec3f,
#ifdef SPECULARTERM
specular: vec3f,
#endif
#ifdef NDOTL
ndl: f32,
#endif
};fn computeLighting(viewDirectionW: vec3f,vNormal: vec3f,lightData: vec4f,diffuseColor: vec3f,specularColor: vec3f,range: f32,glossiness: f32)->lightingInfo {var result: lightingInfo;var lightVectorW: vec3f;var attenuation: f32=1.0;if (lightData.w==0.)
{var direction: vec3f=lightData.xyz-fragmentInputs.vPositionW;attenuation=max(0.,1.0-length(direction)/range);lightVectorW=normalize(direction);}
else
{lightVectorW=normalize(-lightData.xyz);}
var ndl: f32=max(0.,dot(vNormal,lightVectorW));
#ifdef NDOTL
result.ndl=ndl;
#endif
result.diffuse=ndl*diffuseColor*attenuation;
#ifdef SPECULARTERM
var angleW: vec3f=normalize(viewDirectionW+lightVectorW);var specComp: f32=max(0.,dot(vNormal,angleW));specComp=pow(specComp,max(1.,glossiness));result.specular=specComp*specularColor*attenuation;
#endif
return result;}
fn getAttenuation(cosAngle: f32,exponent: f32)->f32 {return max(0.,pow(cosAngle,exponent));}
fn getIESAttenuation(cosAngle: f32,iesLightTexture: texture_2d<f32>,iesLightTextureSampler: sampler)->f32 {var angle=acos(cosAngle)/PI;return textureSampleLevel(iesLightTexture,iesLightTextureSampler,vec2f(angle,0),0.).r;}
fn computeBasicSpotLighting(viewDirectionW: vec3f,lightVectorW: vec3f,vNormal: vec3f,attenuation: f32,diffuseColor: vec3f,specularColor: vec3f,glossiness: f32)->lightingInfo {var result: lightingInfo;var ndl: f32=max(0.,dot(vNormal,lightVectorW));
#ifdef NDOTL
result.ndl=ndl;
#endif
result.diffuse=ndl*diffuseColor*attenuation;
#ifdef SPECULARTERM
var angleW: vec3f=normalize(viewDirectionW+lightVectorW);var specComp: f32=max(0.,dot(vNormal,angleW));specComp=pow(specComp,max(1.,glossiness));result.specular=specComp*specularColor*attenuation;
#endif
return result;}
fn computeIESSpotLighting(viewDirectionW: vec3f,vNormal: vec3f,lightData: vec4f,lightDirection: vec4f,diffuseColor: vec3f,specularColor: vec3f,range: f32,glossiness: f32,iesLightTexture: texture_2d<f32>,iesLightTextureSampler: sampler)->lightingInfo {var direction: vec3f=lightData.xyz-fragmentInputs.vPositionW;var lightVectorW: vec3f=normalize(direction);var attenuation: f32=max(0.,1.0-length(direction)/range);var dotProduct=dot(lightDirection.xyz,-lightVectorW);var cosAngle: f32=max(0.,dotProduct);if (cosAngle>=lightDirection.w)
{attenuation*=getIESAttenuation(dotProduct,iesLightTexture,iesLightTextureSampler);return computeBasicSpotLighting(viewDirectionW,lightVectorW,vNormal,attenuation,diffuseColor,specularColor,glossiness);}
var result: lightingInfo;result.diffuse=vec3f(0.);
#ifdef SPECULARTERM
result.specular=vec3f(0.);
#endif
#ifdef NDOTL
result.ndl=0.;
#endif
return result;}
fn computeSpotLighting(viewDirectionW: vec3f,vNormal: vec3f ,lightData: vec4f,lightDirection: vec4f,diffuseColor: vec3f,specularColor: vec3f,range: f32,glossiness: f32)->lightingInfo {var direction: vec3f=lightData.xyz-fragmentInputs.vPositionW;var lightVectorW: vec3f=normalize(direction);var attenuation: f32=max(0.,1.0-length(direction)/range);var cosAngle: f32=max(0.,dot(lightDirection.xyz,-lightVectorW));if (cosAngle>=lightDirection.w)
{attenuation*=getAttenuation(cosAngle,lightData.w);return computeBasicSpotLighting(viewDirectionW,lightVectorW,vNormal,attenuation,diffuseColor,specularColor,glossiness);}
var result: lightingInfo;result.diffuse=vec3f(0.);
#ifdef SPECULARTERM
result.specular=vec3f(0.);
#endif
#ifdef NDOTL
result.ndl=0.;
#endif
return result;}
fn computeHemisphericLighting(viewDirectionW: vec3f,vNormal: vec3f,lightData: vec4f,diffuseColor: vec3f,specularColor: vec3f,groundColor: vec3f,glossiness: f32)->lightingInfo {var result: lightingInfo;var ndl: f32=dot(vNormal,lightData.xyz)*0.5+0.5;
#ifdef NDOTL
result.ndl=ndl;
#endif
result.diffuse=mix(groundColor,diffuseColor,ndl);
#ifdef SPECULARTERM
var angleW: vec3f=normalize(viewDirectionW+lightData.xyz);var specComp: f32=max(0.,dot(vNormal,angleW));specComp=pow(specComp,max(1.,glossiness));result.specular=specComp*specularColor;
#endif
return result;}
fn computeProjectionTextureDiffuseLighting(projectionLightTexture: texture_2d<f32>,projectionLightSampler: sampler,textureProjectionMatrix: mat4x4f,posW: vec3f)->vec3f {var strq: vec4f=textureProjectionMatrix*vec4f(posW,1.0);strq/=strq.w;var textureColor: vec3f=textureSample(projectionLightTexture,projectionLightSampler,strq.xy).rgb;return textureColor;}
#if defined(AREALIGHTUSED) && defined(AREALIGHTSUPPORTED)
#include<ltcHelperFunctions>
var areaLightsLTC1SamplerSampler: sampler;var areaLightsLTC1Sampler: texture_2d<f32>;var areaLightsLTC2SamplerSampler: sampler;var areaLightsLTC2Sampler: texture_2d<f32>;fn computeAreaLighting(ltc1: texture_2d<f32>,ltc1Sampler:sampler,ltc2:texture_2d<f32>,ltc2Sampler:sampler,viewDirectionW: vec3f,vNormal:vec3f,vPosition:vec3f,lightPosition:vec3f,halfWidth:vec3f, halfHeight:vec3f,diffuseColor:vec3f,specularColor:vec3f,roughness:f32 )->lightingInfo
{var result: lightingInfo;var data: areaLightData=computeAreaLightSpecularDiffuseFresnel(ltc1,ltc1Sampler,ltc2,ltc2Sampler,viewDirectionW,vNormal,vPosition,lightPosition,halfWidth,halfHeight,roughness);
#ifdef SPECULARTERM
var fresnel:vec3f=( specularColor*data.Fresnel.x+( vec3f( 1.0 )-specularColor )*data.Fresnel.y );result.specular+=specularColor*fresnel*data.Specular;
#endif
result.diffuse+=diffuseColor*data.Diffuse;return result;}
#endif
#ifdef CLUSTLIGHT_BATCH
#include<clusteredLightingFunctions>
fn computeClusteredLighting(
lightDataTexture: texture_2d<f32>,
tileMaskBuffer: ptr<storage,array<u32>>,
viewDirectionW: vec3f,
vNormal: vec3f,
lightData: vec4f,
numLights: i32,
glossiness: f32
)->lightingInfo {var result: lightingInfo;let tilePosition=vec2i(fragmentInputs.position.xy*lightData.xy);let maskResolution=vec2i(lightData.zw);var tileIndex=(tilePosition.x*maskResolution.x+tilePosition.y)*maskResolution.y;let numBatches=(numLights+CLUSTLIGHT_BATCH-1)/CLUSTLIGHT_BATCH;var batchOffset=0u;for (var i=0; i<numBatches; i+=1) {var mask=tileMaskBuffer[tileIndex];tileIndex+=1;while mask != 0 {let trailing=firstTrailingBit(mask);mask ^= 1u<<trailing;let light=getClusteredLight(lightDataTexture,batchOffset+trailing);var info: lightingInfo;if light.vLightDirection.w<0.0 {info=computeLighting(viewDirectionW,vNormal,light.vLightData,light.vLightDiffuse.rgb,light.vLightSpecular.rgb,light.vLightDiffuse.a,glossiness);} else {info=computeSpotLighting(viewDirectionW,vNormal,light.vLightData,light.vLightDirection,light.vLightDiffuse.rgb,light.vLightSpecular.rgb,light.vLightDiffuse.a,glossiness);}
result.diffuse+=info.diffuse;
#ifdef SPECULARTERM
result.specular+=info.specular;
#endif
}
batchOffset+=CLUSTLIGHT_BATCH;}
return result;}
#endif
`;
// Sideeffect
if (!ShaderStore.IncludesShadersStoreWGSL[name]) {
    ShaderStore.IncludesShadersStoreWGSL[name] = shader;
}
/** @internal */
export const lightsFragmentFunctionsWGSL = { name, shader };
//# sourceMappingURL=lightsFragmentFunctions.js.map