light_scattering_data.h

#pragma once

namespace ParaEngine
{
#ifdef USE_DIRECTX_RENDERER
    #include "shaders/light_scattering_constants.h"
#else
    //
    // Define a structure used by both C++ and HLSL
    //
    struct sLightScatteringShaderParams
    {
        Vector4 vBeta1;
        Vector4 vBeta2;
        Vector4 vBetaD1;
        Vector4 vBetaD2;
        Vector4 vSumBeta1Beta2;
        Vector4 vLog2eBetaSum;
        Vector4 vRcpSumBeta1Beta2;
        Vector4 vHG;
        Vector4 vConstants;
        Vector4 vTermMultipliers;
        Vector4 vSoilReflectivity;
    };
#endif
    class CLightScatteringData
    {
    public:
        CLightScatteringData();
        ~CLightScatteringData();

    private:
        float m_henyeyG;
        float m_rayleighBetaMultiplier;
        float m_mieBetaMultiplier;
        float m_inscatteringMultiplier;
        float m_extinctionMultiplier;
        float m_reflectivePower;
        sLightScatteringShaderParams m_shaderParams;
    public:
        void recalculateShaderData();

        void setHenyeyG(float g);
        void setRayleighScale(float s);
        void setMieScale(float s);
        void setInscatteringScale(float s);
        void setExtinctionScale(float s);
        void setTerrainReflectionScale(float s);
        sLightScatteringShaderParams* getShaderData(){return &m_shaderParams;};
    protected:

    };
}