MapTree.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 _MAPTREE_H
#define _MAPTREE_H
 
#include "Define.h"
#include "BoundingIntervalHierarchy.h"
#include <span>
#include <unordered_map>
 
namespace VMAP
{
    class ModelInstance;
    class GroupModel;
    class VMapManager;
    enum class LoadResult : uint8;
    enum class ModelIgnoreFlags : uint32;
 
    struct LocationInfo
    {
        GroupModel const* hitModel = nullptr;
        int32 rootId = -1;
        float ground_Z = -G3D::finf();
    };
 
    struct StaticMapTreeLocationInfo : LocationInfo
    {
        ModelInstance const* hitInstance = nullptr;
    };
 
    class TC_COMMON_API StaticMapTree
    {
        typedef std::unordered_map<uint32, std::vector<uint32>> loadedTileMap;
        private:
            uint32 iMapID;
            BIH iTree;
            std::vector<ModelInstance> iTreeValues; // the tree entries
 
            // Store all the map tile idents that are loaded for that map
            // some maps are not splitted into tiles and we have to make sure, not removing the map before all tiles are removed
            // empty tiles have no tile file, hence map with bool instead of just a set (consistency check)
            loadedTileMap iLoadedTiles;
            std::string iBasePath;
 
        private:
            bool getIntersectionTime(G3D::Ray const& pRay, float& pMaxDist, bool pStopAtFirstHit, ModelIgnoreFlags ignoreFlags) const;
            //bool containsLoadedMapTile(unsigned int pTileIdent) const { return(iLoadedMapTiles.containsKey(pTileIdent)); }
        public:
            static uint32 packTileID(uint32 tileX, uint32 tileY) { return tileX << 16 | tileY; }
            static void unpackTileID(uint32 ID, uint32& tileX, uint32& tileY) { tileX = ID >> 16; tileY = ID & 0xFF; }
            static LoadResult CanLoadMap(std::string const& basePath, uint32 mapID, uint32 tileX, uint32 tileY, VMapManager* vm);
 
            StaticMapTree(uint32 mapID, std::string const& basePath);
            ~StaticMapTree();
 
            bool isInLineOfSight(G3D::Vector3 const& pos1, G3D::Vector3 const& pos2, ModelIgnoreFlags ignoreFlags) const;
            bool getObjectHitPos(G3D::Vector3 const& pos1, G3D::Vector3 const& pos2, G3D::Vector3& pResultHitPos, float pModifyDist) const;
            float getHeight(G3D::Vector3 const& pPos, float maxSearchDist) const;
            bool GetLocationInfo(G3D::Vector3 const& pos, StaticMapTreeLocationInfo& info) const;
 
            LoadResult InitMap(std::string const& fname);
            void UnloadMap();
            LoadResult LoadMapTile(uint32 tileX, uint32 tileY, VMapManager* vm);
            void UnloadMapTile(uint32 tileX, uint32 tileY);
            uint32 numLoadedTiles() const { return uint32(iLoadedTiles.size()); }
            std::span<ModelInstance const> getModelInstances() const;
 
        private:
            StaticMapTree(StaticMapTree const& right) = delete;
            StaticMapTree& operator=(StaticMapTree const& right) = delete;
    };
 
    struct TC_COMMON_API AreaInfo
    {
        AreaInfo(): result(false), ground_Z(-G3D::finf()), flags(0), adtId(0),
            rootId(0), groupId(0) { }
        bool result;
        float ground_Z;
        uint32 flags;
        int32 adtId;
        int32 rootId;
        int32 groupId;
    };
}                                                           // VMAP
 
#endif // _MAPTREE_H