@babylonjs/viewer/dist/chunks/lightsFragmentFunctions-DlUx0Vu7.esm.min.js

The Babylon Viewer aims to simplify a specific but common Babylon.js use case: loading, viewing, and interacting with a 3D model.

import{S as e}from"./index-yNtOWHHe.esm.min.js";import"./lightFragment-B3HKXoOS.esm.min.js";const t="lightsFragmentFunctions";e.IncludesShadersStoreWGSL[t]||(e.IncludesShadersStoreWGSL[t]="struct lightingInfo\n{diffuse: vec3f,\n#ifdef SPECULARTERM\nspecular: vec3f,\n#endif\n#ifdef NDOTL\nndl: f32,\n#endif\n};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.)\n{var direction: vec3f=lightData.xyz-fragmentInputs.vPositionW;attenuation=max(0.,1.0-length(direction)/range);lightVectorW=normalize(direction);}\nelse\n{lightVectorW=normalize(-lightData.xyz);}\nvar ndl: f32=max(0.,dot(vNormal,lightVectorW));\n#ifdef NDOTL\nresult.ndl=ndl;\n#endif\nresult.diffuse=ndl*diffuseColor*attenuation;\n#ifdef SPECULARTERM\nvar angleW: vec3f=normalize(viewDirectionW+lightVectorW);var specComp: f32=max(0.,dot(vNormal,angleW));specComp=pow(specComp,max(1.,glossiness));result.specular=specComp*specularColor*attenuation;\n#endif\nreturn result;}\nfn getAttenuation(cosAngle: f32,exponent: f32)->f32 {return max(0.,pow(cosAngle,exponent));}\nfn getIESAttenuation(cosAngle: f32,iesLightTexture: texture_2d<f32>,iesLightTextureSampler: sampler)->f32 {var angle=acos(cosAngle)/PI;return textureSampleLevel(iesLightTexture,iesLightTextureSampler,vec2f(angle,0),0.).r;}\nfn 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));\n#ifdef NDOTL\nresult.ndl=ndl;\n#endif\nresult.diffuse=ndl*diffuseColor*attenuation;\n#ifdef SPECULARTERM\nvar angleW: vec3f=normalize(viewDirectionW+lightVectorW);var specComp: f32=max(0.,dot(vNormal,angleW));specComp=pow(specComp,max(1.,glossiness));result.specular=specComp*specularColor*attenuation;\n#endif\nreturn result;}\nfn 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)\n{attenuation*=getIESAttenuation(dotProduct,iesLightTexture,iesLightTextureSampler);return computeBasicSpotLighting(viewDirectionW,lightVectorW,vNormal,attenuation,diffuseColor,specularColor,glossiness);}\nvar result: lightingInfo;result.diffuse=vec3f(0.);\n#ifdef SPECULARTERM\nresult.specular=vec3f(0.);\n#endif\n#ifdef NDOTL\nresult.ndl=0.;\n#endif\nreturn result;}\nfn 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)\n{attenuation*=getAttenuation(cosAngle,lightData.w);return computeBasicSpotLighting(viewDirectionW,lightVectorW,vNormal,attenuation,diffuseColor,specularColor,glossiness);}\nvar result: lightingInfo;result.diffuse=vec3f(0.);\n#ifdef SPECULARTERM\nresult.specular=vec3f(0.);\n#endif\n#ifdef NDOTL\nresult.ndl=0.;\n#endif\nreturn result;}\nfn 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;\n#ifdef NDOTL\nresult.ndl=ndl;\n#endif\nresult.diffuse=mix(groundColor,diffuseColor,ndl);\n#ifdef SPECULARTERM\nvar angleW: vec3f=normalize(viewDirectionW+lightData.xyz);var specComp: f32=max(0.,dot(vNormal,angleW));specComp=pow(specComp,max(1.,glossiness));result.specular=specComp*specularColor;\n#endif\nreturn result;}\nfn 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;}\n#if defined(AREALIGHTUSED) && defined(AREALIGHTSUPPORTED)\n#include<ltcHelperFunctions>\nvar 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\n{var result: lightingInfo;var data: areaLightData=computeAreaLightSpecularDiffuseFresnel(ltc1,ltc1Sampler,ltc2,ltc2Sampler,viewDirectionW,vNormal,vPosition,lightPosition,halfWidth,halfHeight,roughness);\n#ifdef SPECULARTERM\nvar fresnel:vec3f=( specularColor*data.Fresnel.x+( vec3f( 1.0 )-specularColor )*data.Fresnel.y );result.specular+=specularColor*fresnel*data.Specular;\n#endif\nresult.diffuse+=diffuseColor*data.Diffuse;return result;}\n#endif\n#ifdef CLUSTLIGHT_BATCH\n#include<clusteredLightingFunctions>\nfn computeClusteredLighting(\nlightDataTexture: texture_2d<f32>,\ntileMaskBuffer: ptr<storage,array<u32>>,\nviewDirectionW: vec3f,\nvNormal: vec3f,\nlightData: vec4f,\nnumLights: i32,\nglossiness: f32\n)->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);}\nresult.diffuse+=info.diffuse;\n#ifdef SPECULARTERM\nresult.specular+=info.specular;\n#endif\n}\nbatchOffset+=CLUSTLIGHT_BATCH;}\nreturn result;}\n#endif\n");
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