DtIndirectShaderConstants.h

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/******************************************************************************
** Copyright (c) 2021 VT-MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/


#pragma once

#include <vrvOsg/vrvOsg.h>

#include <vrvCore/DtVirtualBaseClassCreator.h>

#include <vrvGraphicsUtils/DtProgramConstants.h>
#include <vrvGraphicsUtils/DtVector4.h>
#include <vrvGraphicsUtils/DtMatrix4.h>

namespace osg
{
   class State;
}

namespace makVrv
{
   class DtGlProgram;
   class DtGlBuffer;
   class DtDe;
   class DtOsgLightPointManager;

   class DtIndirectShaderConstants;

   typedef DtVirtualBaseClassCreator<DtIndirectShaderConstants> DtIndirectShaderConstantsCreator;

   template <>
   inline const char* creatorTypeName<DtIndirectShaderConstants>(void) { return "DtIndirectShaderConstantsCreator"; }

   class DT_DLL_VRVOSG DtIndirectShaderConstants : public DtProgramConstants
   {
   public:
      friend DtIndirectShaderConstantsCreator;
      virtual ~DtIndirectShaderConstants();
   
      DtIndirectShaderConstants(const DtIndirectShaderConstants& rhs) = delete;
      DtIndirectShaderConstants& operator=(const DtIndirectShaderConstants& rhs) = delete;
   protected:
      DtIndirectShaderConstants(DtDe& de);
   public:
      virtual void update(DtGlBuffer* shaderBufferUbo, const osg::State* state, const DtOsgLightPointManager& lightPointManager);

      virtual void init(const DtGlProgram* program) override;
   protected:
      virtual void reset(void) override;

   public:
      // These are used in the vertex shader
      int myIsDaylight;
      int myLightPointOffset;

      // These are used in the pixel shader
      int myDigitNumber;
      int myDirectionLight;
      int myTexturedLightPoint;

      // These are used by both
      int myTime;
      // x = soften intensity
      // y = light point max range
      // z = whether soft pass
      int myLightPointSoftenIntensityMaxRangePass;
   public:
      static const std::string DigitTextureUniformName;
      static const std::string LightPointUniformName;
      static const std::string EnableLightingUniformName;

      static const float defaultMaxRange;
      static const float defaultLightPointOffset;

      DtValueAndLoc<Vector4_32> vrv_debugIndirectColor;
      DtValueAndLoc<Vector4_32> vrv_missingTextureColor;

      DtValueAndLoc<Matrix4_32> model_view_matrix;
      DtValueAndLoc<Matrix4_32> projection_matrix;

      DtDe& myDe;
   };
}