DtTerrainPatchObjectForestManager.h

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/****************************************************************************** 
** Copyright (c) 2015 MAK Technologies, Inc. 
** All rights reserved. 
******************************************************************************/ 

#pragma once

#include <vrvSt/vrvSt.h>
#include <string>

#include <boost/unordered_map.hpp>
#include <boost/unordered_set.hpp>

#include <vrvCore/DtTreeRecord.h>

namespace osg
{
   class Node;
}

namespace osgEarth
{
   class Map;
   class MapNode;
   class ModelLayer;
}

namespace makVrv 
{ 
   class DtDe;
   class DtOsgTerrainPatchObject;
   class DtStreamedSpeedTreeForest;

   class DT_DLL_VRVST DtTerrainPatchObjectForestManager
   {
   public:
      DtTerrainPatchObjectForestManager(DtDe& de, 
         DtOsgTerrainPatchObject& patch);
      virtual ~DtTerrainPatchObjectForestManager();

      void onDataLoaded(osgEarth::Map* map, osgEarth::ModelLayer* layer, 
         osg::Node* data);
      void onDataUnLoaded(osgEarth::Map* map, osgEarth::ModelLayer* layer, 
         osg::Node* data);

      void onLayerLoaded(osgEarth::MapNode* mapNode, 
         osgEarth::ModelLayer* layer);
      void onLayerUnLoaded(osgEarth::MapNode* mapNode, 
         osgEarth::ModelLayer* layer);

   protected:
      DtStreamedSpeedTreeForest* createForest(const std::string& strName);
      bool hasForest(const std::string& strName);
      DtStreamedSpeedTreeForest* getForest(const std::string& strName);
      void destroyForest(const std::string& strName);
      size_t numForests(void) const;
      void  destroyAllForests(void);

   protected:
      static std::string getForestName(osgEarth::Map* map, 
         osgEarth::ModelLayer* layer);

   protected:
      typedef boost::unordered_map<std::string, DtStreamedSpeedTreeForest*> 
         MapStreamedForests;
      MapStreamedForests myStreamedForests;

      DtOsgTerrainPatchObject& myPatch;

      DtDe& myDe;
   };
}