@babylonjs/viewer/dist/chunks/lightsFragmentFunctions-Ce-PE_08.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-BPURObVq.esm.min.js";import"./shadowsFragmentFunctions-CnUZhkKO.esm.min.js";import"./lightFragment-D2M-tB0p.esm.min.js";const t="lightsFragmentFunctions",i="struct lightingInfo\n{vec3 diffuse;\n#ifdef SPECULARTERM\nvec3 specular;\n#endif\n#ifdef NDOTL\nfloat ndl;\n#endif\n};lightingInfo computeLighting(vec3 viewDirectionW,vec3 vNormal,vec4 lightData,vec3 diffuseColor,vec3 specularColor,float range,float glossiness) {lightingInfo result;vec3 lightVectorW;float attenuation=1.0;if (lightData.w==0.)\n{vec3 direction=lightData.xyz-vPositionW;attenuation=max(0.,1.0-length(direction)/range);lightVectorW=normalize(direction);}\nelse\n{lightVectorW=normalize(-lightData.xyz);}\nfloat ndl=max(0.,dot(vNormal,lightVectorW));\n#ifdef NDOTL\nresult.ndl=ndl;\n#endif\nresult.diffuse=ndl*diffuseColor*attenuation;\n#ifdef SPECULARTERM\nvec3 angleW=normalize(viewDirectionW+lightVectorW);float specComp=max(0.,dot(vNormal,angleW));specComp=pow(specComp,max(1.,glossiness));result.specular=specComp*specularColor*attenuation;\n#endif\nreturn result;}\nfloat getAttenuation(float cosAngle,float exponent) {return max(0.,pow(cosAngle,exponent));}\nfloat getIESAttenuation(float cosAngle,sampler2D iesLightSampler) {float angle=acos(cosAngle)/PI;return texture2D(iesLightSampler,vec2(angle,0.)).r;}\nlightingInfo basicSpotLighting(vec3 viewDirectionW,vec3 lightVectorW,vec3 vNormal,float attenuation,vec3 diffuseColor,vec3 specularColor,float glossiness) {lightingInfo result; \nfloat ndl=max(0.,dot(vNormal,lightVectorW));\n#ifdef NDOTL\nresult.ndl=ndl;\n#endif\nresult.diffuse=ndl*diffuseColor*attenuation;\n#ifdef SPECULARTERM\nvec3 angleW=normalize(viewDirectionW+lightVectorW);float specComp=max(0.,dot(vNormal,angleW));specComp=pow(specComp,max(1.,glossiness));result.specular=specComp*specularColor*attenuation;\n#endif\nreturn result;}\nlightingInfo computeIESSpotLighting(vec3 viewDirectionW,vec3 vNormal,vec4 lightData,vec4 lightDirection,vec3 diffuseColor,vec3 specularColor,float range,float glossiness,sampler2D iesLightSampler) { \nvec3 direction=lightData.xyz-vPositionW;vec3 lightVectorW=normalize(direction);float attenuation=max(0.,1.0-length(direction)/range);float dotProduct=dot(lightDirection.xyz,-lightVectorW);float cosAngle=max(0.,dotProduct);if (cosAngle>=lightDirection.w)\n{ \nattenuation*=getIESAttenuation(dotProduct,iesLightSampler);return basicSpotLighting(viewDirectionW,lightVectorW,vNormal,attenuation,diffuseColor,specularColor,glossiness);}\nlightingInfo result;result.diffuse=vec3(0.);\n#ifdef SPECULARTERM\nresult.specular=vec3(0.);\n#endif\n#ifdef NDOTL\nresult.ndl=0.;\n#endif\nreturn result;}\nlightingInfo computeSpotLighting(vec3 viewDirectionW,vec3 vNormal,vec4 lightData,vec4 lightDirection,vec3 diffuseColor,vec3 specularColor,float range,float glossiness) {vec3 direction=lightData.xyz-vPositionW;vec3 lightVectorW=normalize(direction);float attenuation=max(0.,1.0-length(direction)/range);float cosAngle=max(0.,dot(lightDirection.xyz,-lightVectorW));if (cosAngle>=lightDirection.w)\n{ \nattenuation*=getAttenuation(cosAngle,lightData.w);return basicSpotLighting(viewDirectionW,lightVectorW,vNormal,attenuation,diffuseColor,specularColor,glossiness);}\nlightingInfo result;result.diffuse=vec3(0.);\n#ifdef SPECULARTERM\nresult.specular=vec3(0.);\n#endif\n#ifdef NDOTL\nresult.ndl=0.;\n#endif\nreturn result;}\nlightingInfo computeHemisphericLighting(vec3 viewDirectionW,vec3 vNormal,vec4 lightData,vec3 diffuseColor,vec3 specularColor,vec3 groundColor,float glossiness) {lightingInfo result;float ndl=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\nvec3 angleW=normalize(viewDirectionW+lightData.xyz);float specComp=max(0.,dot(vNormal,angleW));specComp=pow(specComp,max(1.,glossiness));result.specular=specComp*specularColor;\n#endif\nreturn result;}\n#define inline\nvec3 computeProjectionTextureDiffuseLighting(sampler2D projectionLightSampler,mat4 textureProjectionMatrix,vec3 posW){vec4 strq=textureProjectionMatrix*vec4(posW,1.0);strq/=strq.w;vec3 textureColor=texture2D(projectionLightSampler,strq.xy).rgb;return textureColor;}\n#if defined(AREALIGHTUSED) && defined(AREALIGHTSUPPORTED)\n#include<ltcHelperFunctions>\nuniform sampler2D areaLightsLTC1Sampler;uniform sampler2D areaLightsLTC2Sampler;\n#define inline\nlightingInfo computeAreaLighting(sampler2D ltc1,sampler2D ltc2,vec3 viewDirectionW,vec3 vNormal,vec3 vPosition,vec3 lightPosition,vec3 halfWidth,vec3 halfHeight,vec3 diffuseColor,vec3 specularColor,float roughness) \n{lightingInfo result;areaLightData data=computeAreaLightSpecularDiffuseFresnel(ltc1,ltc2,viewDirectionW,vNormal,vPosition,lightPosition,halfWidth,halfHeight,roughness);\n#ifdef SPECULARTERM\nvec3 fresnel=( specularColor*data.Fresnel.x+( vec3( 1.0 )-specularColor )*data.Fresnel.y );result.specular+=specularColor*fresnel*data.Specular;\n#endif\nresult.diffuse+=diffuseColor*data.Diffuse;return result;}\nlightingInfo computeAreaLightingWithTexture(sampler2D ltc1,sampler2D ltc2,sampler2D emissionTexture,vec3 viewDirectionW,vec3 vNormal,vec3 vPosition,vec3 lightPosition,vec3 halfWidth,vec3 halfHeight,vec3 diffuseColor,vec3 specularColor,float roughness) \n{lightingInfo result;areaLightData data=computeAreaLightSpecularDiffuseFresnelWithEmission(ltc1,ltc2,emissionTexture,viewDirectionW,vNormal,vPosition,lightPosition,halfWidth,halfHeight,roughness);\n#ifdef SPECULARTERM\nvec3 fresnel=( specularColor*data.Fresnel.x+( vec3( 1.0 )-specularColor )*data.Fresnel.y );result.specular+=specularColor*fresnel*data.Specular;\n#endif\nresult.diffuse+=diffuseColor*data.Diffuse;return result;}\n#endif\n#if defined(CLUSTLIGHT_BATCH) && CLUSTLIGHT_BATCH>0\n#include<clusteredLightingFunctions>\n#define inline\nlightingInfo computeClusteredLighting(\nsampler2D lightDataTexture,\nsampler2D tileMaskTexture,\nvec3 viewDirectionW,\nvec3 vNormal,\nvec4 lightData,\nivec2 sliceRange,\nfloat glossiness\n) {lightingInfo result;ivec2 tilePosition=ivec2(gl_FragCoord.xy*lightData.xy);int maskHeight=int(lightData.z);tilePosition.y=min(tilePosition.y,maskHeight-1);ivec2 batchRange=sliceRange/CLUSTLIGHT_BATCH;int batchOffset=batchRange.x*CLUSTLIGHT_BATCH;tilePosition.y+=maskHeight*batchRange.x;for (int i=batchRange.x; i<=batchRange.y; i+=1) {uint mask=uint(texelFetch(tileMaskTexture,tilePosition,0).r);tilePosition.y+=maskHeight;int maskOffset=max(sliceRange.x-batchOffset,0);int maskWidth=min(sliceRange.y-batchOffset+1,CLUSTLIGHT_BATCH);mask=extractBits(mask,maskOffset,maskWidth);while (mask != 0u) {uint bit=mask & -mask;mask ^= bit;int position=onlyBitPosition(bit);ClusteredLight light=getClusteredLight(lightDataTexture,batchOffset+maskOffset+position);lightingInfo info;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";e.IncludesShadersStore[t]||(e.IncludesShadersStore[t]=i);const n={name:t,shader:i};export{n as l};
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