DtLightData.h

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/****************************************************************************** 
** Copyright (c) 2023 MAK Technologies, Inc. 
** All rights reserved. 
******************************************************************************/ 

#pragma once

#include <vrvGraphicsUtils/vrvGraphicsUtils.h>

#pragma warning( push )
#pragma warning( disable : 4251 )

#include <vrvGraphicsUtils/DtForwardDeclare.h>
#include <vrvGraphicsUtils/DtLight.h>

#include <vrvMath/DtDataFormat.h>
#include <vrvMath/DtIntSize.h>

#include <vector>

namespace makVrv
{
   struct DtLightDataStruct
   {
      float ambient_spotx[4];  // ambient (xyz) + spot.x (w)
      float diffuse_spoty[4];  // diffuse (xyz) + spot.y (w)
      float specular_spotz[4]; // specular (xyz) + spot.z (w)

      float position_range[4]; // position (xyz) + range (w)
      float direction_type[4]; // direction (xyz) + type (w)

      float attenuation_pack[4]; // attenuation (xyz) + pack (w)

      static size_t GetSizeInFloats(void);
   };

   class DT_DLL_VRVGRAPHICSUTILS DtLightData
   {
   public:
      DtLightData(size_t maxLights, size_t lightBlockCount);

      virtual ~DtLightData();

   private:
      DtLightData() = delete;

      DtLightData(const DtLightData&) = delete;

      DtLightData& operator=(const DtLightData&) = delete;

   public:
      virtual size_t maxLights(void) const;
      
      virtual size_t sizeInBytes(void) const;
      
      virtual size_t inUseSizeInBytes(void) const;
      
      virtual size_t inUseSliceSizeInBytes(void) const;

      virtual void packLights(const LightReusableVector& lights);

      virtual float32* data(int slice);

   protected:
      virtual void packLight(size_t offset, const DtLight* pLight);

   protected:
      std::vector<float32*> myData;

      const size_t myMaxLights;  // maximum lights that we can store.
      size_t myLightCount; // current light count

      const size_t myLightBlockCount;
   };

} //namespace makVrv

#pragma warning( pop )