DtOsgTerrainOverlayManager.h

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


#include <vrvOsg/vrvOsg.h>
#include <vrvOsg/DtOsgTerrainOverlayOperation.h>

#include <osg/Group>
#include <osg/Switch>

#include <vector>
#include <deque>

namespace makVrv
{
   class DT_DLL_VRVOSG DtOsgTerrainOverlayManager
   {
      typedef std::deque<DtOsgTerrainOverlayOperation> OverlayList;

   public:
      DtOsgTerrainOverlayManager(DtDe& de, osg::Node* terrain);

      virtual ~DtOsgTerrainOverlayManager();

      virtual void setTerrain(osg::Node* terrain);

      virtual void setOverlay(DtOsgTerrainOverlayOperation overlay);

      virtual void clearOverlays();

      virtual void removeOverlay(DtTerrainOverlayOperation::OverlayType type);

      virtual void setOverlayScale(DtOsgTerrainOverlayOperation::OverlayType type, const std::vector<double>& scale);

      virtual void setOverlayOffset(DtOsgTerrainOverlayOperation::OverlayType type, const std::vector<double>& offset);

      virtual void setWrapMode(DtOsgTerrainOverlayOperation::OverlayType type, int);

      virtual void setBlendMode(DtOsgTerrainOverlayOperation::OverlayType type, int);

      virtual void setRasterLayerPosition(DtOsgTerrainOverlayOperation::OverlayType type, int);

      virtual OverlayList overlays() const;

      virtual std::string overlayDefinition(DtTerrainOverlayOperation::OverlayType type) const;

      virtual std::vector<double> overlayScale(DtTerrainOverlayOperation::OverlayType type) const;

      virtual std::vector<double> overlayOffset(DtTerrainOverlayOperation::OverlayType type) const;

      virtual DtTerrainOverlayOperation defaultOverlay(DtOsgTerrainOverlayOperation::OverlayType type);

      virtual DtTerrainOverlayOperation currentOverlay(DtOsgTerrainOverlayOperation::OverlayType type);

      virtual int maxTextureUnits();
   protected:
      void initializeGraph();

      void restoreGraph();

      virtual void applyOverlays(bool reset = true);

   protected:
      OverlayList myOverlays;

      osg::ref_ptr<osg::Node> myTerrainNode;
      osg::StateSet* myOriginalState;
      std::vector<std::string> myOriginalDescriptions;

      DtDe& myDe;

      bool myInitializedFlag;

      int myMaxTextureUnits;
   };
}