Method WritePBRLightShaderAttribs

PBR/src/GLTF_PBR_Renderer.cpp:830–873

}

void GLTF_PBR_Renderer::WritePBRLightShaderAttribs(const PBRLightShaderAttribsData& AttribsData,
                                                   HLSL::PBRLightAttribs*           pShaderAttribs)
{
    VERIFY_EXPR(pShaderAttribs != nullptr);
    VERIFY_EXPR(AttribsData.Light != nullptr);
    const auto& Light = *AttribsData.Light;

    pShaderAttribs->Type = static_cast<int>(Light.Type);

    if (AttribsData.Position != nullptr)
    {
        pShaderAttribs->PosX = AttribsData.Position->x;
        pShaderAttribs->PosY = AttribsData.Position->y;
        pShaderAttribs->PosZ = AttribsData.Position->z;
    }

    if (AttribsData.Direction != nullptr)
    {
        pShaderAttribs->DirectionX = AttribsData.Direction->x;
        pShaderAttribs->DirectionY = AttribsData.Direction->y;
        pShaderAttribs->DirectionZ = AttribsData.Direction->z;
    }

    pShaderAttribs->ShadowMapIndex = AttribsData.ShadowMapIndex;

    auto Intensity = Light.Intensity;
    if (pShaderAttribs->Type != LIGHT_TYPE_DIRECTIONAL)
    {
        Intensity *= AttribsData.DistanceScale * AttribsData.DistanceScale;
    }
    pShaderAttribs->IntensityR = Light.Color.r * Intensity;
    pShaderAttribs->IntensityG = Light.Color.g * Intensity;
    pShaderAttribs->IntensityB = Light.Color.b * Intensity;

    float Range            = Light.Range * AttribsData.DistanceScale;
    float Range2           = Range * Range;
    pShaderAttribs->Range4 = Range2 * Range2;

    float SpotAngleScale  = 1.f / std::max(0.001f, std::cos(Light.InnerConeAngle) - std::cos(Light.OuterConeAngle));
    float SpotAngleOffset = -std::cos(Light.OuterConeAngle) * SpotAngleScale;

    pShaderAttribs->SpotAngleOffset = SpotAngleOffset;
    pShaderAttribs->SpotAngleScale  = SpotAngleScale;
}

} // namespace Diligent