DtGpuCullingAndLodDefines.h

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/******************************************************************************
** Copyright (c) 2019 MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/


#pragma once

#include <vrvIndirectRendering/vrvIndirectRendering.h>

#include <vrvGraphicsUtils/DtCommonTypes.h>
#include <vrvGraphicsUtils/DtMatrix4.h>
#include <vrvGraphicsUtils/DtVector2.h>

namespace makVrv
{
   struct DT_DLL_VRVINDIRECTRENDERING DtIndirectFadeParameters
   {
   public:
      DtIndirectFadeParameters(float fadeDuration, float fadeMaxRange, float fadeAttenuationRange);
   
      DtIndirectFadeParameters();

   public:
      float myFadeDuration;
      float myFadeMaxRange;
      float myFadeAttenuationRange;
   };

   class DT_DLL_VRVINDIRECTRENDERING DtIndirectViewParameters
   {
   public:
      // ! constructor
      DtIndirectViewParameters();

      // ! destructor
      virtual ~DtIndirectViewParameters();

      virtual void setModelViewMatrix(const Matrix4_64& modelViewMatrix);
      virtual void setProjectionMatrix(const Matrix4_64& projectionMatrix);
      virtual void setViewPortSize(const DtVector2<int>& viewportSize);
      virtual void setCameraPosition(const Vector3_64& cameraPosition);
      virtual void setZoomMagnification(float zoomMag);
      virtual void setOrthoCulling(bool orthoCull);
      virtual void setAltitude2D(float altitude2D);
      virtual void setLodScaleEnabled(bool enabled);
      virtual void setLodScale(float lodScale);
      virtual void setFadeParameters(const DtIndirectFadeParameters& fadeParameters);
      
      virtual const Matrix4_64& modelViewMatrix(void) const;
      virtual const Matrix4_64& projectionMatrix(void) const;
      virtual const Vector3_64& cameraPosition(void) const;
      virtual const DtVector2<int>& viewPortSize(void) const;
      virtual float zoomMagnification(void) const;
      virtual bool orthoCulling(void) const;
      virtual float altitude2D(void) const;
      virtual bool lodScaleEnabled(void) const;
      virtual float lodScale(void) const;
      virtual DtIndirectFadeParameters fadeParameters(void) const;

   protected:
      Matrix4_64 myModelViewMatrix;
      Matrix4_64 myProjectionMatrix64;
      Vector3_64 myCameraPosition64;
      DtVector2<int> myViewportSize;

      float myZoomMagnification;
      bool myOrthoCulling;
      float myAltitude2D;

      bool myLodScaleEnabled;
      float myLodScale;
            
      DtIndirectFadeParameters myFadeParameters;
   };

   class DT_DLL_VRVINDIRECTRENDERING DtIndirectRenderingParameters
   {
   public:

      DtIndirectRenderingParameters();

      virtual ~DtIndirectRenderingParameters();
      virtual void setGeometriesChanged(bool changed);
      virtual void setPerInstanceDataChanged(bool changed);
      virtual void setNumInstancesChanged(bool changed);
      virtual void setAreInstanceTexturesDirty(bool dirty);

      virtual bool numInstancesChanged(void) const;
      virtual bool geometriesChanged(void) const;
      virtual int maxDrawCount(void) const;
      virtual bool areInstanceTexturesDirty(void) const;
      virtual bool perInstanceDataChanged() const;

   protected:
      bool myNumInstancesChanged;
      bool myGeometriesChanged;
      int myMaxDrawCount;
      bool myAreInstanceTexturesDirty;
      bool myPerInstanceDataChanged;
   };

   struct DtIndirectGpuOutputInstance
   {
      int myInstanceId; // instance id
      int myModelId;    // model id;
      int myGeometryIndex; // geometry index
      int myUserData;
   };

   struct DtIndirectOffsetAndSize
   {
      int myOffset;
      int mySize;
   };
}