[10165] New collission system (vmap) implementation

Important:
* You have to re-extract and assemble vmaps
* Update your config file, new option 'vmap.enableIndoorCheck' added

New features:
* Include WMO+DBC area information for correct subarea identification and indoor check
* Support for WMO liquid (fishing/swimming in cities, instances and oterh WMO based environments)

Technical changes:
* New Bounding Interval Hierarchy (BIH) data structure for better performance
* Referenced model data for reduced memory usage,
  needs more files, but reduces overall file size from ~1.9GB to ~550MB

Additional Authors:
arrai (DBC handling and indoor detection)
faramir118 (windows support and bug investigation)
And of course thanks Vladimir for a lot of patience and support!

src/shared/vmap/VMapManager2.h

@@ -0,0 +1,114 @@
+/*
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef _VMAPMANAGER2_H
+#define _VMAPMANAGER2_H
+
+#include "IVMapManager.h"
+#include "Utilities/UnorderedMap.h"
+#include "Platform/Define.h"
+#include <G3D/Vector3.h>
+
+//===========================================================
+
+#define MAP_FILENAME_EXTENSION2 ".vmtree"
+
+#define FILENAMEBUFFER_SIZE 500
+
+/**
+This is the main Class to manage loading and unloading of maps, line of sight, height calculation and so on.
+For each map or map tile to load it reads a directory file that contains the ModelContainer files used by this map or map tile.
+Each global map or instance has its own dynamic BSP-Tree.
+The loaded ModelContainers are included in one of these BSP-Trees.
+Additionally a table to match map ids and map names is used.
+*/
+
+//===========================================================
+
+namespace VMAP
+{
+    class StaticMapTree;
+    class WorldModel;
+
+    class ManagedModel
+    {
+        public:
+            ManagedModel(): iModel(0), iRefCount(0) {}
+            void setModel(WorldModel *model) { iModel = model; }
+            WorldModel *getModel() { return iModel; }
+            void incRefCount() { ++iRefCount; }
+            int decRefCount() { return --iRefCount; }
+        protected:
+            WorldModel *iModel;
+            int iRefCount;
+    };
+
+    typedef UNORDERED_MAP<uint32 , StaticMapTree *> InstanceTreeMap;
+    typedef UNORDERED_MAP<std::string, ManagedModel> ModelFileMap;
+
+    class VMapManager2 : public IVMapManager
+    {
+        protected:
+            // Tree to check collision
+            ModelFileMap iLoadedModelFiles;
+            InstanceTreeMap iInstanceMapTrees;
+            // UNORDERED_MAP<unsigned int , bool> iMapsSplitIntoTiles;
+            UNORDERED_MAP<unsigned int , bool> iIgnoreMapIds;
+
+            bool _loadMap(uint32 pMapId, const std::string &basePath, uint32 tileX, uint32 tileY);
+            /* void _unloadMap(uint32 pMapId, uint32 x, uint32 y); */
+
+        public:
+            // public for debug
+            G3D::Vector3 convertPositionToInternalRep(float x, float y, float z) const;
+            G3D::Vector3 convertPositionToMangosRep(float x, float y, float z) const;
+            static std::string getMapFileName(unsigned int pMapId);
+
+            VMapManager2();
+            ~VMapManager2(void);
+
+            int loadMap(const char* pBasePath, unsigned int pMapId, int x, int y);
+
+            void unloadMap(unsigned int pMapId, int x, int y);
+            void unloadMap(unsigned int pMapId);
+
+            bool isInLineOfSight(unsigned int pMapId, float x1, float y1, float z1, float x2, float y2, float z2) ;
+            /**
+            fill the hit pos and return true, if an object was hit
+            */
+            bool getObjectHitPos(unsigned int pMapId, float x1, float y1, float z1, float x2, float y2, float z2, float& rx, float &ry, float& rz, float pModifyDist);
+            float getHeight(unsigned int pMapId, float x, float y, float z);
+
+            bool processCommand(char *pCommand) { return false; }      // for debug and extensions
+
+            void preventMapsFromBeingUsed(const char* pMapIdString);
+            bool getAreaInfo(unsigned int pMapId, float x, float y, float &z, uint32 &flags, int32 &adtId, int32 &rootId, int32 &groupId) const;
+            bool GetLiquidLevel(uint32 pMapId, float x, float y, float z, uint8 ReqLiquidType, float &level, float &floor, uint32 &type) const;
+
+            WorldModel* acquireModelInstance(const std::string &basepath, const std::string &filename);
+            void releaseModelInstance(const std::string &filename);
+
+            // what's the use of this? o.O
+            virtual std::string getDirFileName(unsigned int pMapId, int x, int y) const
+            {
+                return getMapFileName(pMapId);
+            }
+            virtual bool existsMap(const char* pBasePath, unsigned int pMapId, int x, int y);
+    };
+}
+#endif