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diff --git a/src/common/Collision/Management/VMapManager.h b/src/common/Collision/Management/VMapManager.h
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+/*
+ * This file is part of the TrinityCore Project. See AUTHORS file for Copyright information
+ *
+ * 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 TRINITYCORE_VMAP_MANAGER2_H
+#define TRINITYCORE_VMAP_MANAGER2_H
+
+#include "Define.h"
+#include "ModelIgnoreFlags.h"
+#include "Optional.h"
+#include <memory>
+#include <mutex>
+#include <span>
+#include <string>
+#include <unordered_map>
+#include <vector>
+
+//===========================================================
+
+/**
+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 ManagedModel;
+    class ModelInstance;
+    class StaticMapTree;
+    class WorldModel;
+
+    typedef std::unordered_map<uint32, std::unique_ptr<StaticMapTree>> InstanceTreeMap;
+    typedef std::unordered_map<std::string, std::weak_ptr<ManagedModel>> ModelFileMap;
+
+    enum DisableTypes : uint8
+    {
+        VMAP_DISABLE_AREAFLAG       = 0x1,
+        VMAP_DISABLE_HEIGHT         = 0x2,
+        VMAP_DISABLE_LOS            = 0x4,
+        VMAP_DISABLE_LIQUIDSTATUS   = 0x8
+    };
+
+    enum class LoadResult : uint8
+    {
+        Success,
+        FileNotFound,
+        VersionMismatch,
+        ReadFromFileFailed,
+        DisabledInConfig
+    };
+
+    #define VMAP_INVALID_HEIGHT       -100000.0f            // for check
+    #define VMAP_INVALID_HEIGHT_VALUE -200000.0f            // real assigned value in unknown height case
+
+    struct AreaAndLiquidData
+    {
+        struct AreaInfo
+        {
+            AreaInfo() = default;
+            AreaInfo(int32 _groupId, int32 _adtId, int32 _rootId, uint32 _mogpFlags, uint32 _uniqueId)
+                : groupId(_groupId), adtId(_adtId), rootId(_rootId), mogpFlags(_mogpFlags), uniqueId(_uniqueId) { }
+            int32 groupId = 0;
+            int32 adtId = 0;
+            int32 rootId = 0;
+            uint32 mogpFlags = 0;
+            uint32 uniqueId = 0;
+        };
+        struct LiquidInfo
+        {
+            LiquidInfo() = default;
+            LiquidInfo(uint32 _type, float _level) : type(_type), level(_level) { }
+            uint32 type = 0;
+            float level = 0.0f;
+        };
+
+        float floorZ = VMAP_INVALID_HEIGHT;
+        Optional<AreaInfo> areaInfo;
+        Optional<LiquidInfo> liquidInfo;
+    };
+
+    class TC_COMMON_API VMapManager
+    {
+        protected:
+            bool iEnableLineOfSightCalc;
+            bool iEnableHeightCalc;
+            bool thread_safe_environment;
+            // Tree to check collision
+            ModelFileMap iLoadedModelFiles;
+            InstanceTreeMap iInstanceMapTrees;
+            std::unordered_map<uint32, uint32> iParentMapData;
+            // Mutex for iLoadedModelFiles
+            std::mutex LoadedModelFilesLock;
+
+            InstanceTreeMap::const_iterator GetMapTree(uint32 mapId) const;
+
+        public:
+            // public for debug
+            static std::string getMapFileName(uint32 mapId);
+            static std::string getTileFileName(uint32 mapID, uint32 tileX, uint32 tileY, std::string_view extension);
+
+            VMapManager();
+
+            VMapManager(VMapManager const&) = delete;
+            VMapManager(VMapManager&&) = delete;
+
+            VMapManager& operator=(VMapManager const&) = delete;
+            VMapManager& operator=(VMapManager&&) = delete;
+
+            ~VMapManager();
+
+            void InitializeThreadUnsafe(std::unordered_map<uint32, std::vector<uint32>> const& mapData);
+            void InitializeThreadUnsafe(uint32 mapId, int32 parentMapId);
+            /**
+                Enable/disable LOS calculation
+                It is enabled by default. If it is enabled in mid game the maps have to loaded manualy
+            */
+            void setEnableLineOfSightCalc(bool enableLineOfSightCalc) { iEnableLineOfSightCalc = enableLineOfSightCalc; }
+
+            /**
+                Enable/disable model height calculation
+                It is enabled by default. If it is enabled in mid game the maps have to loaded manualy
+            */
+            void setEnableHeightCalc(bool enableHeightCalc) { iEnableHeightCalc = enableHeightCalc; }
+
+            bool isLineOfSightCalcEnabled() const { return iEnableLineOfSightCalc; }
+            bool isHeightCalcEnabled() const { return iEnableHeightCalc; }
+            bool isMapLoadingEnabled() const { return iEnableLineOfSightCalc || iEnableHeightCalc; }
+
+            LoadResult loadMap(std::string const& basePath, uint32 mapId, uint32 x, uint32 y);
+
+            void unloadMap(uint32 mapId, uint32 x, uint32 y);
+
+            void unloadMap(uint32 mapId);
+
+            bool isInLineOfSight(uint32 mapId, float x1, float y1, float z1, float x2, float y2, float z2, ModelIgnoreFlags ignoreFlags);
+            /**
+                test if we hit an object. return true if we hit one. rx, ry, rz will hold the hit position or the dest position, if no intersection was found
+                return a position, that is modifyDist closer to the origin
+            */
+            bool getObjectHitPos(uint32 mapId, float x1, float y1, float z1, float x2, float y2, float z2, float& rx, float& ry, float& rz, float modifyDist);
+            float getHeight(uint32 mapId, float x, float y, float z, float maxSearchDist);
+
+            /**
+                Query world model area info.
+            */
+            bool getAreaAndLiquidData(uint32 mapId, float x, float y, float z, Optional<uint8> reqLiquidType, AreaAndLiquidData& data) const;
+
+            std::shared_ptr<WorldModel> acquireModelInstance(std::string const& basepath, std::string const& filename);
+            void releaseModelInstance(std::string const& filename);
+
+            // what's the use of this? o.O
+            static std::string getDirFileName(uint32 mapId, uint32 x, uint32 y)
+            {
+                return getTileFileName(mapId, x, y, "vmtile");
+            }
+            LoadResult existsMap(std::string const& basePath, uint32 mapId, uint32 x, uint32 y);
+
+            std::span<ModelInstance const> getModelsOnMap(uint32 mapId) const;
+
+            int32 getParentMapId(uint32 mapId) const;
+
+            typedef uint32(*GetLiquidFlagsFn)(uint32 liquidType);
+            GetLiquidFlagsFn GetLiquidFlagsPtr;
+
+            typedef bool(*IsVMAPDisabledForFn)(uint32 entry, uint8 flags);
+            IsVMAPDisabledForFn IsVMAPDisabledForPtr;
+    };
+}
+
+#endif // TRINITYCORE_VMAP_MANAGER2_H