metaverse_artist/Lux URP Essentials/Shaders/Includes/Lux URP Blend Lighting.hlsl

#ifndef URP_BLENDLIGHTING_INCLUDED
#define URP_BLENDLIGHTING_INCLUDED

half4 LuxFragmentBlendPBR(InputData inputData, half3 albedo, half metallic, half3 specular,
    half smoothness, half occlusion, half3 emission, half alpha, float3 shadowShift)
{
    BRDFData brdfData;
    InitializeBRDFData(albedo, metallic, specular, smoothness, alpha, brdfData);
    
//  ShadowMask: To ensure backward compatibility we have to avoid using shadowMask input, as it is not present in older shaders
    #if defined(SHADOWS_SHADOWMASK) && defined(LIGHTMAP_ON)
        half4 shadowMask = inputData.shadowMask;
    #elif !defined (LIGHTMAP_ON)
        half4 shadowMask = unity_ProbesOcclusion;
    #else
        half4 shadowMask = half4(1, 1, 1, 1);
    #endif

    Light mainLight = GetMainLight(inputData.shadowCoord, inputData.positionWS, shadowMask);
    //Light mainLight = GetMainLight(inputData.shadowCoord);

//  SSAO
    #if defined(_SCREEN_SPACE_OCCLUSION)
        AmbientOcclusionFactor aoFactor = GetScreenSpaceAmbientOcclusion(inputData.normalizedScreenSpaceUV);
        mainLight.color *= aoFactor.directAmbientOcclusion;
        occlusion = min(occlusion, aoFactor.indirectAmbientOcclusion);
    #endif

    MixRealtimeAndBakedGI(mainLight, inputData.normalWS, inputData.bakedGI, half4(0, 0, 0, 0));

    half3 color = GlobalIllumination(brdfData, inputData.bakedGI, occlusion, inputData.normalWS, inputData.viewDirectionWS);
    color += LightingPhysicallyBased(brdfData, mainLight, inputData.normalWS, inputData.viewDirectionWS);

#ifdef _ADDITIONAL_LIGHTS
    uint pixelLightCount = GetAdditionalLightsCount();
    for (uint lightIndex = 0u; lightIndex < pixelLightCount; ++lightIndex)
    {
//      shadowShift is > 0 only for pixels around or below the intersection. So using inputData.positionWS + shadowShift should be ok.
        //Light light = GetAdditionalLight(lightIndex, inputData.positionWS + shadowShift);
    //  URP 10: We have to use the new GetAdditionalLight function
        Light light = GetAdditionalLight(lightIndex, inputData.positionWS + shadowShift, shadowMask);
        #if defined(_SCREEN_SPACE_OCCLUSION)
            light.color *= aoFactor.directAmbientOcclusion;
        #endif
        color += LightingPhysicallyBased(brdfData, light, inputData.normalWS, inputData.viewDirectionWS);
    }
#endif

#ifdef _ADDITIONAL_LIGHTS_VERTEX
    color += inputData.vertexLighting * brdfData.diffuse;
#endif
    color += emission;
    return half4(color, alpha);
}
#endif