MMapManager.h

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/*
 * Copyright (C) 2008-2016 TrinityCore <http://www.trinitycore.org/>
 * Copyright (C) 2005-2010 MaNGOS <http://getmangos.com/>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef _MMAP_MANAGER_H
#define _MMAP_MANAGER_H

#include "Define.h"
#include "DetourAlloc.h"
#include "DetourNavMesh.h"
#include "DetourNavMeshQuery.h"
#include "MapDefines.h"
#include <string>
#include <unordered_map>
#include <set>
#include <vector>

// move map related classes
namespace MMAP
{
 typedef std::unordered_map<uint32, dtTileRef> MMapTileSet;
 typedef std::unordered_map<uint32, dtNavMeshQuery*> NavMeshQuerySet;


 typedef std::set<uint32> TerrainSet;

 struct TC_COMMON_API NavMeshHolder
 {
 // Pre-built navMesh
 dtNavMesh* navMesh;

 // List of terrain swap map ids used to build the navMesh
 TerrainSet terrainIds;

 MMapTileSet loadedTileRefs;
 };

 struct TC_COMMON_API PhasedTile
 {
 unsigned char* data;
 MmapTileHeader fileHeader;
 int32 dataSize;
 };

 typedef std::unordered_map<uint32, PhasedTile*> PhaseTileContainer;
 typedef std::unordered_map<uint32, PhaseTileContainer> PhaseTileMap;


 typedef std::unordered_map<uint32, TerrainSet> TerrainSetMap;

 class TC_COMMON_API MMapData
 {
 public:
 MMapData(dtNavMesh* mesh, uint32 mapId);
 ~MMapData();

 dtNavMesh* GetNavMesh(TerrainSet swaps);

 // we have to use single dtNavMeshQuery for every instance, since those are not thread safe
 NavMeshQuerySet navMeshQueries; // instanceId to query

 dtNavMesh* navMesh;
 MMapTileSet loadedTileRefs;
 TerrainSetMap loadedPhasedTiles;

 private:
 uint32 _mapId;
 PhaseTileContainer _baseTiles;
 std::set<uint32> _activeSwaps;
 void RemoveSwap(PhasedTile* ptile, uint32 swap, uint32 packedXY);
 void AddSwap(PhasedTile* tile, uint32 swap, uint32 packedXY);
 };


 typedef std::unordered_map<uint32, MMapData*> MMapDataSet;

 // singleton class
 // holds all all access to mmap loading unloading and meshes
 class TC_COMMON_API MMapManager
 {
 public:
 MMapManager() : loadedTiles(0), thread_safe_environment(true) {}
 ~MMapManager();

 void InitializeThreadUnsafe(std::unordered_map<uint32, std::vector<uint32>> const& mapData);
 bool loadMap(const std::string& basePath, uint32 mapId, int32 x, int32 y);
 bool unloadMap(uint32 mapId, int32 x, int32 y);
 bool unloadMap(uint32 mapId);
 bool unloadMapInstance(uint32 mapId, uint32 instanceId);

 // the returned [dtNavMeshQuery const*] is NOT threadsafe
 dtNavMeshQuery const* GetNavMeshQuery(uint32 mapId, uint32 instanceId, TerrainSet swaps);
 dtNavMesh const* GetNavMesh(uint32 mapId, TerrainSet swaps);

 uint32 getLoadedTilesCount() const { return loadedTiles; }
 uint32 getLoadedMapsCount() const { return uint32(loadedMMaps.size()); }

 typedef std::unordered_map<uint32, std::vector<uint32>> PhaseChildMapContainer;
 void LoadPhaseTiles(PhaseChildMapContainer::const_iterator phasedMapData, int32 x, int32 y);
 void UnloadPhaseTile(PhaseChildMapContainer::const_iterator phasedMapData, int32 x, int32 y);
 PhaseTileContainer const* GetPhaseTileContainer(uint32 mapId) const
 {
 auto itr = _phaseTiles.find(mapId);
 if (itr != _phaseTiles.end())
 return &itr->second;
 return nullptr;
 }

 private:
 bool loadMapData(uint32 mapId);
 uint32 packTileID(int32 x, int32 y);

 MMapDataSet::const_iterator GetMMapData(uint32 mapId) const;
 MMapDataSet loadedMMaps;
 PhaseChildMapContainer phaseMapData;
 uint32 loadedTiles;
 bool thread_safe_environment;

 PhasedTile* LoadTile(uint32 mapId, int32 x, int32 y);
 PhaseTileMap _phaseTiles;
 };
}

#endif