DtOsgTerrainOverlayOperation.h

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/******************************************************************************
** Copyright (c) 2008 MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/


#ifndef DtOsgOverlayOperation_H_
#define DtOsgOverlayOperation_H_

#include <vrvOsg/vrvOsg.h>
#include <vrvCore/DtDe.h>
#include <vrvCore/DtTerrainOverlayOperation.h>

#include <osg/Node>
#include <osg/Texture>
#include <osg/TexEnv>

#include <string>
#include <vector>

namespace makVrv
{
   class DT_DLL_VRVOSG DtOsgTerrainOverlayOperation : public DtTerrainOverlayOperation
   {
   public:
      typedef std::vector<int> TextureUnitList;

   public:
      DtOsgTerrainOverlayOperation();

      DtOsgTerrainOverlayOperation(const DtOsgTerrainOverlayOperation&);

      DtOsgTerrainOverlayOperation& operator=(
         const DtOsgTerrainOverlayOperation&);

      DtOsgTerrainOverlayOperation(OverlayType type, std::string definition);

      virtual DtOsgTerrainOverlayOperation::TextureUnitList apply(
         osg::Node* node, DtDe& de, 
         const DtOsgTerrainOverlayOperation::TextureUnitList& free);

      int countUnitsNeeded( osg::Node* node, 
         const DtOsgTerrainOverlayOperation::TextureUnitList& free );

      virtual void restoreDefaults(osg::Node* node, DtDe& de);

      void setWrapMode(osg::Texture::WrapMode);
      osg::Texture::WrapMode wrapMode() const;

      void setBlendMode(osg::TexEnv::Mode);
      osg::TexEnv::Mode blendMode() const;

   protected:
      void unitsUsed(osg::Node* node, std::set<int> &usedunits, 
         const DtOsgTerrainOverlayOperation::TextureUnitList &testunits);

   protected:
      osg::Texture::WrapMode  myWrapMode;
      osg::TexEnv::Mode       myBlendMode;
   };
}
#endif /* DtOsgOverlayOperation_H_ */