include/vantageTerrainImplementation/boundingVolumeTerrainSourceTracker.h

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/*******************************************************************************
** Copyright (c) 2010 MAK Technologies, Inc.
** All rights reserved.
*******************************************************************************/

#pragma once



#include <vantageTerrainImplementation/terrainSourceTracker.h>
#include <vantageTerrainImplementation/pageInVisitor.h>
#include <vantageTerrainImplementation/vantageTerrainImplementationDefines.h>
#include <vantageTerrainImplementation/vantageTerrainImplementationUtil.h>
#include <vantageTerrainImplementation/vantageTerrainConsoleCommands.h>

//Mak Terrain Toolkit includes
#include <geometry/sphere.h>

//VR-Link includes
#include <vlutil/vlSmartPointers.h>

#include <tbb/spin_rw_mutex.h>

#include <string>
#include <list>
#include <stack>

class DtPageInGeometryCommand;
class DtPageOutNodesCommand;

struct DtNodeBoundingInfo
{
   DtNodeBoundingInfo(DtSphere boundingSphere, std::string filename,
      bool knownNotFound)
      : myBoundingSphere(boundingSphere)
      , myFilename(filename)
      , myKnownNotFound(knownNotFound)
   {

   }

   DtSphere myBoundingSphere;
   std::string myFilename;
   bool myKnownNotFound;
};


struct DtPagedNodeStatus
{
   DtPagedNodeStatus(DtNodeBoundingInfo boundingInfo, unsigned int numTriangles,
      unsigned int lastUsed = 0)
      : myBoundingInfo(boundingInfo)
      , myNumTriangles(numTriangles)
      , myLastUsed(lastUsed)
      , myPendingRemoval(false)
   {

   }

   DtNodeBoundingInfo myBoundingInfo;
   unsigned int myLastUsed;
   unsigned int myNumTriangles;
   bool myPendingRemoval;
};

typedef DtBoost::shared_ptr< DtNodeBoundingInfo > DtNodeBoundingInfoPtr;
typedef DtBoost::shared_ptr< DtPagedNodeStatus > DtPagedNodeStatusPtr;
typedef std::list<DtNodeBoundingInfoPtr> DtNodeBoundingInfoList;
typedef std::map<DtNodeId, DtNodeBoundingInfoPtr> DtNodeBoundingInfoMap;
typedef std::map<DtNodeId, DtPagedNodeStatusPtr> DtPagedNodeStatusMap;
typedef std::map<DtNodeId, int> DtNodeToChildCountMap;

class DT_DLL_vantageTerrainImplementation DtBoundingVolumeTerrainSourceTracker 
   : public DtTerrainSourceTracker
{
public:

   DtBoundingVolumeTerrainSourceTracker(DtPagerCommandQueue* commandQueue);

   virtual ~DtBoundingVolumeTerrainSourceTracker();

   virtual void updatePagedOutInfo(bool worldPagedOut, 
      const DtNodeBoundingInfoList& volumes);

   virtual void updatePagedInInfo(
      const DtNodeBoundingInfoMap& volumes,
      const unsigned int intersectId = 0);

   virtual void removePagedInInfo(DtNodeId node);

   virtual bool dataAvailable(DtPagingMetaDataPtr metaData, 
      DtTerrainPagingGeometryPtr geometry);

   virtual void pageInData(DtPagingMetaDataPtr metaData,
      DtTerrainPagingGeometryPtr geometry);

   virtual void drawDebugInfo(btIDebugDraw* debugDrawer);

   virtual bool canPageOutData(unsigned int intersectId);

   virtual void pageOutOldestData(const int priority);

   virtual unsigned int findOldestPagedData(unsigned int& numTrianglesOut);

   virtual void printBoundingVolumes() const;

   virtual void setChildCount(DtNodeId node, const unsigned int& count);
   virtual const unsigned int childCount(DtNodeId node);
   virtual void removeChildCount(DtNodeId node);

protected:

   virtual DtPageInGeometryCommand* createPageInGeometryCommand(
      DtPagingMetaDataPtr metaData);

   virtual DtPageOutNodesCommand* createPageOutNodesCommand(
      DtPagingMetaDataPtr metaData);

   virtual unsigned int getNumTriangles(DtNodeId node);

protected:

   DtPrintBoundingVolumesCommand* myPrintBoundingVolumesCommand;

   DtNodeBoundingInfoList myPagedOutAreas;

   DtPagedNodeStatusMap myPagedInAreas;

   bool myWorldPagedOut;

   DtNodeId myOldestPagedObject;
   bool myRecomputeOldestPagedObject;

   DtNodeToChildCountMap myNodeToChildCountMap;

};