@babylonjs/core/Shaders/volumetricLightingRenderVolume.fragment.js

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// Do not edit.
import { ShaderStore } from "../Engines/shaderStore.js";
import "./ShadersInclude/sceneFragmentDeclaration.js";
import "./ShadersInclude/sceneUboDeclaration.js";
const name = "volumetricLightingRenderVolumePixelShader";
const shader = `#include<__decl__sceneFragment>
uniform mat4 invViewProjection;uniform vec3 lightDir; 
uniform vec2 outputTextureSize;uniform vec4 extinctionPhaseG;uniform vec3 lightPower;uniform vec2 textureRatio;uniform sampler2D depthTexture;varying vec4 vWorldPos;float henyeyGreenstein(float g,float cosTheta) {float denom=1.0+g*g-2.0*g*cosTheta;return 1.0/(4.0*3.14159265)*(1.0-g*g)/(denom*sqrt(max(denom,0.0)));}
vec3 integrateDirectional(float eyeDist,vec3 viewDir,vec3 lightDir) {float phaseG=extinctionPhaseG.w;
#ifdef USE_EXTINCTION
vec3 extinction=extinctionPhaseG.xyz;return henyeyGreenstein(phaseG,dot(viewDir,lightDir))*(vec3(1.0)-exp(-extinction*eyeDist))/extinction;
#else
return vec3(henyeyGreenstein(phaseG,dot(viewDir,lightDir)))*vec3(eyeDist);
#endif
}
void main(void) {float depth=texelFetch(depthTexture,ivec2(gl_FragCoord.xy*textureRatio),0).r;vec4 worldPos=vWorldPos;if (gl_FragCoord.z>depth) {vec4 ndc=vec4((gl_FragCoord.xy/outputTextureSize)*2.0-1.0,depth*2.0-1.0,1.0);worldPos=invViewProjection*ndc;worldPos=worldPos/worldPos.w;}
vec3 viewDir=worldPos.xyz-vEyePosition.xyz;float eyeDist=length(viewDir);viewDir=viewDir/eyeDist;float fSign=gl_FrontFacing ? 1.0 : -1.0;vec3 integral=integrateDirectional(eyeDist,-viewDir,lightDir);gl_FragColor=vec4(lightPower*integral*fSign,1.0);}
`;
// Sideeffect
if (!ShaderStore.ShadersStore[name]) {
    ShaderStore.ShadersStore[name] = shader;
}
/** @internal */
export const volumetricLightingRenderVolumePixelShader = { name, shader };
//# sourceMappingURL=volumetricLightingRenderVolume.fragment.js.map