AmbientLight

原文

vec3 getAmbientLightIrradiance( const in vec3 ambientLightColor ) {
    vec3 irradiance = ambientLightColor;
    #ifndef PHYSICALLY_CORRECT_LIGHTS
        irradiance *= PI;
    #endif
    return irradiance;
}

 #if defined( RE_IndirectDiffuse )
    vec3 iblIrradiance = vec3( 0.0 );
    vec3 irradiance = getAmbientLightIrradiance( ambientLightColor );
    irradiance += getLightProbeIrradiance( lightProbe, geometry );
    #if ( 0 > 0 )

    #endif
#endif
    
void RE_IndirectDiffuse_Physical( const in vec3 irradiance, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {
    reflectedLight.indirectDiffuse += irradiance * BRDF_Diffuse_Lambert( material.diffuseColor );
}

 vec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + reflectedLight.directSpecular + reflectedLight.indirectSpecular + totalEmissiveRadiance;

• ambientLightColor 强度在cpu计算

if ( light.isAmbientLight ) {
        r += color.r * intensity;
        g += color.g * intensity;
        b += color.b * intensity;
}