import { F as ShaderStore } from './index-SYWuN9sm.esm.js';

// Do not edit.
const name$2 = "fogFragmentDeclaration";
const shader$2 = `#ifdef FOG
#define FOGMODE_NONE 0.
#define FOGMODE_EXP 1.
#define FOGMODE_EXP2 2.
#define FOGMODE_LINEAR 3.
#define E 2.71828
uniform vec4 vFogInfos;uniform vec3 vFogColor;varying vec3 vFogDistance;float CalcFogFactor()
{float fogCoeff=1.0;float fogStart=vFogInfos.y;float fogEnd=vFogInfos.z;float fogDensity=vFogInfos.w;float fogDistance=length(vFogDistance);if (FOGMODE_LINEAR==vFogInfos.x)
{fogCoeff=(fogEnd-fogDistance)/(fogEnd-fogStart);}
else if (FOGMODE_EXP==vFogInfos.x)
{fogCoeff=1.0/pow(E,fogDistance*fogDensity);}
else if (FOGMODE_EXP2==vFogInfos.x)
{fogCoeff=1.0/pow(E,fogDistance*fogDistance*fogDensity*fogDensity);}
return clamp(fogCoeff,0.0,1.0);}
#endif
`;
// Sideeffect
if (!ShaderStore.IncludesShadersStore[name$2]) {
    ShaderStore.IncludesShadersStore[name$2] = shader$2;
}

// Do not edit.
const name$1 = "logDepthFragment";
const shader$1 = `#ifdef LOGARITHMICDEPTH
gl_FragDepthEXT=log2(vFragmentDepth)*logarithmicDepthConstant*0.5;
#endif
`;
// Sideeffect
if (!ShaderStore.IncludesShadersStore[name$1]) {
    ShaderStore.IncludesShadersStore[name$1] = shader$1;
}

// Do not edit.
const name = "fogFragment";
const shader = `#ifdef FOG
float fog=CalcFogFactor();
#ifdef PBR
fog=toLinearSpace(fog);
#endif
color.rgb=mix(vFogColor,color.rgb,fog);
#endif
`;
// Sideeffect
if (!ShaderStore.IncludesShadersStore[name]) {
    ShaderStore.IncludesShadersStore[name] = shader;
}
//# sourceMappingURL=fogFragment-XfuSNrCP.esm.js.map
