cutoutCache.h

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/*******************************************************************************
** Copyright (c) 2020 MAK Technologies, Inc.
** All rights reserved.
*******************************************************************************/



#pragma once

#include <vantageTerrainImplementation/vantageTerrainImplementationDefines.h>
#include <vantageTerrainImplementation/osgToBullet.h>
#include <vantageTerrainImplementation/tileData.h>

#include <vrfutil/objectDB.h>

#include <tbb/spin_rw_mutex.h>

class DT_DLL_vantageTerrainImplementation DtCutoutCache
{
public:
   explicit DtCutoutCache(
      const DtFilename& filename,
      const osgEarth::Profile* profile,
      bool erasePrevious = false);

   virtual ~DtCutoutCache();

   struct Record
   {
      DtCollisionObjectList collisionObjects;
      unsigned numberOfTriangles;
      DtTileData::Extent::Vector maskExtents;

      Record();
   };

   virtual std::shared_ptr<Record> read(const osgEarth::TileKey& key);

   virtual void write(
      const osgEarth::TileKey& key,
      const DtCollisionObjectList& objects,
      const DtTileData::Extent::Vector& maskExtents);

   virtual void clear();

protected:
   void fillCache();

   DtObjectDB::Ptr myObjectDB;
   const std::unique_ptr<DtObjectDB::Cursor> myCursor;
   
   osg::ref_ptr<const osgEarth::Profile> myProfile;

   DtObjectDB::Offset myNextWriteLocationOffset;
   DtObjectDB::Offset myNextWriteLocation;

   typedef std::map<osgEarth::TileKey, std::shared_ptr<Record> > CacheMap;

   CacheMap myCacheMap;
   mutable tbb::spin_rw_mutex myCacheMutex;

   const std::string myCacheFilename;
};