Initial Mangos Three Commit

src/tools/Extractor_projects/Movemap-Generator/MapBuilder.cpp

@@ -0,0 +1,922 @@
+/**
+ * MaNGOS is a full featured server for World of Warcraft, supporting
+ * the following clients: 1.12.x, 2.4.3, 3.3.5a, 4.3.4a and 5.4.8
+ *
+ * Copyright (C) 2005-2020 MaNGOS <https://getmangos.eu>
+ *
+ * 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
+ *
+ * World of Warcraft, and all World of Warcraft or Warcraft art, images,
+ * and lore are copyrighted by Blizzard Entertainment, Inc.
+ */
+
+#include <DetourNavMeshBuilder.h>
+#include <DetourCommon.h>
+
+#include "MMapCommon.h"
+#include "MapBuilder.h"
+
+#include "MapTree.h"
+#include "ModelInstance.h"
+#include "ExtractorCommon.h"
+
+#include "TileMsgBlock.h"
+
+using namespace VMAP;
+
+namespace MMAP
+{
+    MapBuilder::MapBuilder(char const* magic, float maxWalkableAngle, bool skipLiquid,
+                           bool skipContinents, bool skipJunkMaps, bool skipBattlegrounds,
+                           bool debugOutput, bool bigBaseUnit, const char* offMeshFilePath) :
+        m_terrainBuilder(NULL),
+        m_debugOutput(debugOutput),
+        m_skipContinents(skipContinents),
+        m_skipJunkMaps(skipJunkMaps),
+        m_skipBattlegrounds(skipBattlegrounds),
+        m_maxWalkableAngle(maxWalkableAngle),
+        m_bigBaseUnit(bigBaseUnit),
+        m_rcContext(NULL),
+        m_offMeshFilePath(offMeshFilePath),
+        m_magic(magic),
+        m_numThreads(-1), m_threadPool(NULL), m_poolActivated(false)
+    {
+        m_terrainBuilder = new TerrainBuilder(skipLiquid);
+
+        m_rcContext = new rcContext(false);
+
+        discoverTiles();
+    }
+
+    /**************************************************************************/
+    MapBuilder::~MapBuilder()
+    {
+        if (activated())
+        {
+            delete m_threadPool;
+            m_poolActivated = false;
+        }
+        for (TileList::iterator it = m_tiles.begin(); it != m_tiles.end(); ++it)
+        {
+            (*it).second->clear();
+            delete(*it).second;
+        }
+
+        delete m_terrainBuilder;
+        delete m_rcContext;
+    }
+
+    /**************************************************************************/
+    int MapBuilder::activate(int num_threads)
+    {
+        int result = -1;
+        m_numThreads = num_threads;
+        m_threadPool = new TileThreadPool();
+
+        if (m_threadPool && m_numThreads && !m_poolActivated)
+        {
+            result = m_threadPool->start(m_numThreads);
+            if (result != -1)
+            {
+                m_poolActivated = true;
+            }
+        }
+        return result;
+    }
+
+    /**************************************************************************/
+    void MapBuilder::discoverTiles()
+    {
+        vector<string> files;
+        int mapID;
+        uint32 tileX, tileY, tileID, count = 0;
+        char filter[12];
+
+        printf(" Discovering maps...  ");
+        getDirContents(files, "maps");
+        for (uint32 i = 0; i < files.size(); ++i)
+        {
+            mapID = uint32(atoi(files[i].substr(0, 3).c_str()));
+            if (m_tiles.find(mapID) == m_tiles.end())
+            {
+                m_tiles.insert(pair<uint32, set<uint32>*>(mapID, new set<uint32>));
+                count++;
+            }
+        }
+
+        files.clear();
+        getDirContents(files, "vmaps", "*.vmtree");
+        for (uint32 i = 0; i < files.size(); ++i)
+        {
+            mapID = uint32(atoi(files[i].substr(0, 3).c_str()));
+            m_tiles.insert(pair<uint32, set<uint32>*>(mapID, new set<uint32>));
+            count++;
+        }
+        printf(" found %u.\n", count);
+
+        count = 0;
+        printf(" Discovering tiles... ");
+        for (TileList::iterator itr = m_tiles.begin(); itr != m_tiles.end(); ++itr)
+        {
+            set<uint32>* tiles = (*itr).second;
+            mapID = (*itr).first;
+
+            sprintf(filter, "%03u*.vmtile", mapID);
+            files.clear();
+            getDirContents(files, "vmaps", filter);
+            for (uint32 i = 0; i < files.size(); ++i)
+            {
+                tileX = uint32(atoi(files[i].substr(7, 2).c_str()));
+                tileY = uint32(atoi(files[i].substr(4, 2).c_str()));
+                tileID = StaticMapTree::packTileID(tileY, tileX);
+
+                tiles->insert(tileID);
+                count++;
+            }
+
+            sprintf(filter, "%03u*", mapID);
+            files.clear();
+            getDirContents(files, "maps", filter);
+            for (uint32 i = 0; i < files.size(); ++i)
+            {
+                tileY = uint32(atoi(files[i].substr(3, 2).c_str()));
+                tileX = uint32(atoi(files[i].substr(5, 2).c_str()));
+                tileID = StaticMapTree::packTileID(tileX, tileY);
+
+                if (tiles->insert(tileID).second)
+                {
+                    count++;
+                }
+            }
+        }
+        printf(" found %u.\n\n", count);
+    }
+
+    /**************************************************************************/
+    set<uint32>* MapBuilder::getTileList(int mapID)
+    {
+        TileList::iterator itr = m_tiles.find(mapID);
+        if (itr != m_tiles.end())
+        {
+            return (*itr).second;
+        }
+
+        set<uint32>* tiles = new set<uint32>();
+        m_tiles.insert(pair<uint32, set<uint32>*>(mapID, tiles));
+        return tiles;
+    }
+
+    /**************************************************************************/
+    void MapBuilder::buildAllMaps()
+    {
+        for (TileList::iterator it = m_tiles.begin(); it != m_tiles.end(); ++it)
+        {
+            uint32 mapID = (*it).first;
+            if (!shouldSkipMap(mapID,m_skipContinents,m_skipJunkMaps,m_skipBattlegrounds))
+            {
+                buildMap(mapID, false);
+            }
+        }
+
+        if (activated())
+        {
+            Tile_Message_Block *finish_mb = new Tile_Message_Block(NULL);
+            finish_mb->msg_type(ACE_Message_Block::MB_HANGUP);
+            m_threadPool->putq(finish_mb);
+            m_threadPool->wait();
+        }
+
+    }
+
+    /**************************************************************************/
+    void MapBuilder::buildMap(int mapID, bool standAlone)
+    {
+        set<uint32>* tiles = getTileList(mapID);
+
+        // make sure we process maps which don't have tiles
+        if (!tiles->size())
+        {
+            // convert coord bounds to grid bounds
+            uint32 minX, minY, maxX, maxY;
+            getGridBounds(mapID, minX, minY, maxX, maxY);
+
+            // add all tiles within bounds to tile list.
+            for (uint32 i = minX; i <= maxX; ++i)
+                for (uint32 j = minY; j <= maxY; ++j)
+                {
+                    tiles->insert(StaticMapTree::packTileID(i, j));
+                }
+        }
+
+        if (!tiles->size())
+        {
+            return;
+        }
+
+        // build navMesh
+        dtNavMesh* navMesh = NULL;
+        dtNavMeshParams* meshParams = NULL;
+        buildNavMesh(mapID, navMesh, meshParams);
+        if (!navMesh)
+        {
+            printf("Failed creating navmesh for map %03u!              \n", mapID);
+            if (meshParams)
+            {
+                delete meshParams;
+            }
+            return;
+        }
+
+        if (activated())
+          { dtFreeNavMesh(navMesh); }  // each tile will get it's own pointer to navMesh
+
+        // now start building/scheduling mmtiles for each tile
+        printf(" %s map %03u [%u tiles]\n", activated() ? "Scheduling" : "Building", mapID, (unsigned int)tiles->size());
+        for (set<uint32>::iterator it = tiles->begin(); it != tiles->end(); ++it)
+        {
+            uint32 tileX, tileY;
+
+            // unpack tile coords
+            StaticMapTree::unpackTileID((*it), tileX, tileY);
+
+            if (shouldSkipTile(mapID, tileX, tileY))
+            {
+                continue;
+            }
+
+            if (!activated())
+            {
+                buildTile(mapID, tileX, tileY, navMesh);
+            }
+            else
+            {
+                dtNavMesh *mesh = NULL;
+                buildNavMesh(mapID, mesh, meshParams); //meshParams is not null, so we get a new pointer to dtNavMesh
+                if (mesh)
+                {
+                    TileBuilder* tb = new TileBuilder(this, mapID, tileX, tileY, mesh);
+                    Tile_Message_Block *mb = new Tile_Message_Block(tb);
+                    if (m_threadPool->putq(mb) == -1)
+                    {
+                        break;
+                    }
+                }
+            }
+        }
+        if (activated() && standAlone)
+        {
+            Tile_Message_Block *finish_mb = new Tile_Message_Block(NULL);
+            finish_mb->msg_type(ACE_Message_Block::MB_HANGUP);
+            m_threadPool->putq(finish_mb);
+            m_threadPool->wait();
+        }
+
+        if (!activated())
+        {
+            dtFreeNavMesh(navMesh);
+        }
+
+        if (meshParams)
+        {
+            delete meshParams;
+        }
+
+        if (!activated())
+        {
+            printf(" Map %03u complete!\n\n", mapID);
+        }
+    }
+
+    /**************************************************************************/
+    void MapBuilder::buildSingleTile(int mapID, int tileX, int tileY)
+    {
+        dtNavMesh* navMesh = NULL;
+        dtNavMeshParams* meshParams = NULL;
+        buildNavMesh(mapID, navMesh, meshParams);
+        if (!navMesh)
+        {
+            printf("Failed creating navmesh!              \n");
+            return;
+        }
+
+        buildTile(mapID, tileX, tileY, navMesh);
+        dtFreeNavMesh(navMesh);
+        if (meshParams)
+        {
+            delete meshParams;
+        }
+    }
+
+    /**************************************************************************/
+    void MapBuilder::buildTile(int mapID, int tileX, int tileY, dtNavMesh* navMesh)
+    {
+        MeshData meshData;
+
+        // get heightmap data
+        m_terrainBuilder->loadMap(mapID, tileX, tileY, meshData, m_magic);
+
+        // get model data
+        m_terrainBuilder->loadVMap(mapID, tileY, tileX, meshData);
+
+        // if there is no data, give up now
+        if (!meshData.solidVerts.size() && !meshData.liquidVerts.size())
+        {
+            return;
+        }
+
+        // remove unused vertices
+        TerrainBuilder::cleanVertices(meshData.solidVerts, meshData.solidTris);
+        TerrainBuilder::cleanVertices(meshData.liquidVerts, meshData.liquidTris);
+
+        // gather all mesh data for final data check, and bounds calculation
+        G3D::Array<float> allVerts;
+        allVerts.append(meshData.liquidVerts);
+        allVerts.append(meshData.solidVerts);
+
+        if (!allVerts.size())
+        {
+            return;
+        }
+
+        // get bounds of current tile
+        float bmin[3], bmax[3];
+        getTileBounds(tileX, tileY, allVerts.getCArray(), allVerts.size() / 3, bmin, bmax);
+
+        m_terrainBuilder->loadOffMeshConnections(mapID, tileX, tileY, meshData, m_offMeshFilePath);
+
+        printf(" Building map %03u - Tile [%02u,%02u]\n", mapID, tileX, tileY);
+        buildMoveMapTile(mapID, tileX, tileY, meshData, bmin, bmax, navMesh);
+    }
+
+    /**************************************************************************/
+    void MapBuilder::getGridBounds(int mapID, uint32& minX, uint32& minY, uint32& maxX, uint32& maxY)
+    {
+        maxX = INT_MAX;
+        maxY = INT_MAX;
+        minX = INT_MIN;
+        minY = INT_MIN;
+
+        float bmin[3] = { 0 };
+        float bmax[3] = { 0 };
+        float lmin[3] = { 0 };
+        float lmax[3] = { 0 };
+        MeshData meshData;
+
+        // make sure we process maps which don't have tiles
+        // initialize the static tree, which loads WDT models
+        if (!m_terrainBuilder->loadVMap(mapID, 64, 64, meshData))
+        {
+            return;
+        }
+
+        // get the coord bounds of the model data
+        if (meshData.solidVerts.size() + meshData.liquidVerts.size() == 0)
+        {
+            return;
+        }
+
+        // get the coord bounds of the model data
+        if (meshData.solidVerts.size() && meshData.liquidVerts.size())
+        {
+            rcCalcBounds(meshData.solidVerts.getCArray(), meshData.solidVerts.size() / 3, bmin, bmax);
+            rcCalcBounds(meshData.liquidVerts.getCArray(), meshData.liquidVerts.size() / 3, lmin, lmax);
+            rcVmin(bmin, lmin);
+            rcVmax(bmax, lmax);
+        }
+        else if (meshData.solidVerts.size())
+        {
+            rcCalcBounds(meshData.solidVerts.getCArray(), meshData.solidVerts.size() / 3, bmin, bmax);
+        }
+        else
+        {
+            rcCalcBounds(meshData.liquidVerts.getCArray(), meshData.liquidVerts.size() / 3, lmin, lmax);
+        }
+
+        // convert coord bounds to grid bounds
+        maxX = 32 - bmin[0] / GRID_SIZE;
+        maxY = 32 - bmin[2] / GRID_SIZE;
+        minX = 32 - bmax[0] / GRID_SIZE;
+        minY = 32 - bmax[2] / GRID_SIZE;
+    }
+
+    /**************************************************************************/
+    void MapBuilder::buildNavMesh(int mapID, dtNavMesh*& navMesh, dtNavMeshParams*& navMeshParams)
+    {
+        bool isFirstNavMesh = navMeshParams ? false : true;
+
+        if (isFirstNavMesh)
+        {
+            set<uint32>* tiles = getTileList(mapID);
+            int polyBits = DT_POLY_BITS;
+            int maxTiles = tiles->size();
+            int maxPolysPerTile = 1 << polyBits;
+
+            /***          calculate bounds of map         ***/
+            uint32 tileXMin = 64, tileYMin = 64, tileXMax = 0, tileYMax = 0, tileX, tileY;
+            for (set<uint32>::iterator it = tiles->begin(); it != tiles->end(); ++it)
+            {
+                StaticMapTree::unpackTileID((*it), tileX, tileY);
+
+                if (tileX > tileXMax)
+                {
+                    tileXMax = tileX;
+                }
+                else if (tileX < tileXMin)
+                {
+                    tileXMin = tileX;
+                }
+
+                if (tileY > tileYMax)
+                {
+                    tileYMax = tileY;
+                }
+                else if (tileY < tileYMin)
+                {
+                    tileYMin = tileY;
+                }
+            }
+
+            // use Max because '32 - tileX' is negative for values over 32
+            float bmin[3], bmax[3];
+            getTileBounds(tileXMax, tileYMax, NULL, 0, bmin, bmax);
+
+            /***       now create the navmesh       ***/
+            // navmesh creation params
+            navMeshParams = new dtNavMeshParams();
+            memset(navMeshParams, 0, sizeof(dtNavMeshParams));
+            navMeshParams->tileWidth = GRID_SIZE;
+            navMeshParams->tileHeight = GRID_SIZE;
+            rcVcopy(navMeshParams->orig, bmin);
+            navMeshParams->maxTiles = maxTiles;
+            navMeshParams->maxPolys = maxPolysPerTile;
+        }
+
+        navMesh = dtAllocNavMesh();
+        if (!navMesh->init(navMeshParams))
+        {
+            printf("Failed creating navmesh!                \n");
+            return;
+        }
+
+        if (isFirstNavMesh)
+        {
+            char fileName[25];
+            sprintf(fileName, "mmaps/%03u.mmap", mapID);
+
+            FILE* file = fopen(fileName, "wb");
+            if (!file)
+            {
+                dtFreeNavMesh(navMesh);
+                char message[1024];
+                sprintf(message, "Failed to open %s for writing!\n", fileName);
+                perror(message);
+                return;
+            }
+            // now that we know navMesh params are valid, we can write them to file
+            fwrite(navMeshParams, sizeof(dtNavMeshParams), 1, file);
+            fclose(file);
+        }
+    }
+
+    /**************************************************************************/
+    void MapBuilder::buildMoveMapTile(int mapID, int tileX, int tileY,
+                                      MeshData& meshData, float bmin[3], float bmax[3],
+                                      dtNavMesh* navMesh)
+    {
+        // console output
+        char tileString[10];
+        sprintf(tileString, "[%02i,%02i] ", tileX, tileY);
+
+        IntermediateValues iv;
+
+        float* tVerts = meshData.solidVerts.getCArray();
+        int tVertCount = meshData.solidVerts.size() / 3;
+        int* tTris = meshData.solidTris.getCArray();
+        int tTriCount = meshData.solidTris.size() / 3;
+
+        float* lVerts = meshData.liquidVerts.getCArray();
+        int lVertCount = meshData.liquidVerts.size() / 3;
+        int* lTris = meshData.liquidTris.getCArray();
+        int lTriCount = meshData.liquidTris.size() / 3;
+        uint8* lTriFlags = meshData.liquidType.getCArray();
+
+        // these are WORLD UNIT based metrics
+        // this are basic unit dimentions
+        // value have to divide GRID_SIZE(533.33333f) ( aka: 0.5333, 0.2666, 0.3333, 0.1333, etc )
+        const static float BASE_UNIT_DIM = m_bigBaseUnit ? 0.533333f : 0.266666f;
+
+        // All are in UNIT metrics!
+        const static int VERTEX_PER_MAP = int(GRID_SIZE / BASE_UNIT_DIM + 0.5f);
+        const static int VERTEX_PER_TILE = m_bigBaseUnit ? 40 : 80; // must divide VERTEX_PER_MAP
+        const static int TILES_PER_MAP = VERTEX_PER_MAP / VERTEX_PER_TILE;
+
+        rcConfig config;
+        memset(&config, 0, sizeof(rcConfig));
+
+        rcVcopy(config.bmin, bmin);
+        rcVcopy(config.bmax, bmax);
+
+        config.maxVertsPerPoly = DT_VERTS_PER_POLYGON;
+        config.cs = BASE_UNIT_DIM;
+        config.ch = BASE_UNIT_DIM;
+        config.walkableSlopeAngle = m_maxWalkableAngle;
+        config.tileSize = VERTEX_PER_TILE;
+        config.walkableRadius = m_bigBaseUnit ? 1 : 2;
+        config.borderSize = config.walkableRadius + 3;
+        config.maxEdgeLen = VERTEX_PER_TILE + 1;        //anything bigger than tileSize
+        config.walkableHeight = m_bigBaseUnit ? 3 : 6;
+        config.walkableClimb = m_bigBaseUnit ? 2 : 4;   // keep less than walkableHeight
+        config.minRegionArea = rcSqr(60);
+        config.mergeRegionArea = rcSqr(50);
+        config.maxSimplificationError = 2.0f;       // eliminates most jagged edges (tinny polygons)
+        config.detailSampleDist = config.cs * 64;
+        config.detailSampleMaxError = config.ch * 2;
+
+        // this sets the dimensions of the heightfield - should maybe happen before border padding
+        rcCalcGridSize(config.bmin, config.bmax, config.cs, &config.width, &config.height);
+
+        // allocate subregions : tiles
+        Tile* tiles = new Tile[TILES_PER_MAP * TILES_PER_MAP];
+
+        // Initialize per tile config.
+        rcConfig tileCfg;
+        memcpy(&tileCfg, &config, sizeof(rcConfig));
+        tileCfg.width = config.tileSize + config.borderSize * 2;
+        tileCfg.height = config.tileSize + config.borderSize * 2;
+
+        // build all tiles
+        for (int y = 0; y < TILES_PER_MAP; ++y)
+        {
+            for (int x = 0; x < TILES_PER_MAP; ++x)
+            {
+                Tile& tile = tiles[x + y * TILES_PER_MAP];
+
+                // Calculate the per tile bounding box.
+                tileCfg.bmin[0] = config.bmin[0] + (x * config.tileSize - config.borderSize) * config.cs;
+                tileCfg.bmin[2] = config.bmin[2] + (y * config.tileSize - config.borderSize) * config.cs;
+                tileCfg.bmax[0] = config.bmin[0] + ((x + 1) * config.tileSize + config.borderSize) * config.cs;
+                tileCfg.bmax[2] = config.bmin[2] + ((y + 1) * config.tileSize + config.borderSize) * config.cs;
+
+                float tbmin[2], tbmax[2];
+                tbmin[0] = tileCfg.bmin[0];
+                tbmin[1] = tileCfg.bmin[2];
+                tbmax[0] = tileCfg.bmax[0];
+                tbmax[1] = tileCfg.bmax[2];
+
+                // build heightfield
+                tile.solid = rcAllocHeightfield();
+                if (!tile.solid || !rcCreateHeightfield(m_rcContext, *tile.solid, tileCfg.width, tileCfg.height, tileCfg.bmin, tileCfg.bmax, tileCfg.cs, tileCfg.ch))
+                {
+                    printf("%s Failed building heightfield!            \n", tileString);
+                    continue;
+                }
+
+                // mark all walkable tiles, both liquids and solids
+                unsigned char* triFlags = new unsigned char[tTriCount];
+                memset(triFlags, NAV_GROUND, tTriCount * sizeof(unsigned char));
+                rcClearUnwalkableTriangles(m_rcContext, tileCfg.walkableSlopeAngle, tVerts, tVertCount, tTris, tTriCount, triFlags);
+                rcRasterizeTriangles(m_rcContext, tVerts, tVertCount, tTris, triFlags, tTriCount, *tile.solid, config.walkableClimb);
+                delete [] triFlags;
+
+                rcFilterLowHangingWalkableObstacles(m_rcContext, config.walkableClimb, *tile.solid);
+                rcFilterLedgeSpans(m_rcContext, tileCfg.walkableHeight, tileCfg.walkableClimb, *tile.solid);
+                rcFilterWalkableLowHeightSpans(m_rcContext, tileCfg.walkableHeight, *tile.solid);
+
+                rcRasterizeTriangles(m_rcContext, lVerts, lVertCount, lTris, lTriFlags, lTriCount, *tile.solid, config.walkableClimb);
+
+                // compact heightfield spans
+                tile.chf = rcAllocCompactHeightfield();
+                if (!tile.chf || !rcBuildCompactHeightfield(m_rcContext, tileCfg.walkableHeight, tileCfg.walkableClimb, *tile.solid, *tile.chf))
+                {
+                    printf("%s Failed compacting heightfield!            \n", tileString);
+                    continue;
+                }
+
+                // build polymesh intermediates
+                if (!rcErodeWalkableArea(m_rcContext, config.walkableRadius, *tile.chf))
+                {
+                    printf("%s Failed eroding area!                    \n", tileString);
+                    continue;
+                }
+
+                if (!rcBuildDistanceField(m_rcContext, *tile.chf))
+                {
+                    printf("%s Failed building distance field!         \n", tileString);
+                    continue;
+                }
+
+                if (!rcBuildRegions(m_rcContext, *tile.chf, tileCfg.borderSize, tileCfg.minRegionArea, tileCfg.mergeRegionArea))
+                {
+                    printf("%s Failed building regions!                \n", tileString);
+                    continue;
+                }
+
+                tile.cset = rcAllocContourSet();
+                if (!tile.cset || !rcBuildContours(m_rcContext, *tile.chf, tileCfg.maxSimplificationError, tileCfg.maxEdgeLen, *tile.cset))
+                {
+                    printf("%s Failed building contours!               \n", tileString);
+                    continue;
+                }
+
+                // build polymesh
+                tile.pmesh = rcAllocPolyMesh();
+                if (!tile.pmesh || !rcBuildPolyMesh(m_rcContext, *tile.cset, tileCfg.maxVertsPerPoly, *tile.pmesh))
+                {
+                    printf("%s Failed building polymesh!               \n", tileString);
+                    continue;
+                }
+
+                tile.dmesh = rcAllocPolyMeshDetail();
+                if (!tile.dmesh || !rcBuildPolyMeshDetail(m_rcContext, *tile.pmesh, *tile.chf, tileCfg.detailSampleDist, tileCfg    .detailSampleMaxError, *tile.dmesh))
+                {
+                    printf("%s Failed building polymesh detail!        \n", tileString);
+                    continue;
+                }
+
+                // free those up
+                // we may want to keep them in the future for debug
+                // but right now, we don't have the code to merge them
+                rcFreeHeightField(tile.solid);
+                tile.solid = NULL;
+                rcFreeCompactHeightfield(tile.chf);
+                tile.chf = NULL;
+                rcFreeContourSet(tile.cset);
+                tile.cset = NULL;
+            }
+        }
+
+        // merge per tile poly and detail meshes
+        rcPolyMesh** pmmerge = new rcPolyMesh*[TILES_PER_MAP * TILES_PER_MAP];
+        if (!pmmerge)
+        {
+            printf("%s alloc pmmerge FAILED!          \n", tileString);
+            delete [] tiles;
+            return;
+        }
+
+        rcPolyMeshDetail** dmmerge = new rcPolyMeshDetail*[TILES_PER_MAP * TILES_PER_MAP];
+        if (!dmmerge)
+        {
+            printf("%s alloc dmmerge FAILED!          \n", tileString);
+            delete [] pmmerge;
+            delete [] tiles;
+            return;
+        }
+
+        int nmerge = 0;
+        for (int y = 0; y < TILES_PER_MAP; ++y)
+        {
+            for (int x = 0; x < TILES_PER_MAP; ++x)
+            {
+                Tile& tile = tiles[x + y * TILES_PER_MAP];
+                if (tile.pmesh)
+                {
+                    pmmerge[nmerge] = tile.pmesh;
+                    dmmerge[nmerge] = tile.dmesh;
+                    nmerge++;
+                }
+            }
+        }
+
+        iv.polyMesh = rcAllocPolyMesh();
+        if (!iv.polyMesh)
+        {
+            printf("%s alloc iv.polyMesh FAILED!          \n", tileString);
+            delete [] pmmerge;
+            delete [] dmmerge;
+            delete [] tiles;
+            return;
+        }
+        rcMergePolyMeshes(m_rcContext, pmmerge, nmerge, *iv.polyMesh);
+
+        iv.polyMeshDetail = rcAllocPolyMeshDetail();
+        if (!iv.polyMeshDetail)
+        {
+            printf("%s alloc m_dmesh FAILED!          \n", tileString);
+            delete [] pmmerge;
+            delete [] dmmerge;
+            delete [] tiles;
+            return;
+        }
+        rcMergePolyMeshDetails(m_rcContext, dmmerge, nmerge, *iv.polyMeshDetail);
+
+        // free things up
+        delete [] pmmerge;
+        delete [] dmmerge;
+
+        delete [] tiles;
+
+#if defined (CATA)
+        // remove padding for extraction
+        for (int i = 0; i < iv.polyMesh->nverts; ++i)
+        {
+            unsigned short* v = &iv.polyMesh->verts[i * 3];
+            v[0] -= (unsigned short)config.borderSize;
+            v[2] -= (unsigned short)config.borderSize;
+        }
+#endif
+        // set polygons as walkable
+        // TODO: special flags for DYNAMIC polygons, ie surfaces that can be turned on and off
+        for (int i = 0; i < iv.polyMesh->npolys; ++i)
+            if (iv.polyMesh->areas[i] & RC_WALKABLE_AREA)
+            {
+                iv.polyMesh->flags[i] = iv.polyMesh->areas[i];
+            }
+
+        // setup mesh parameters
+        dtNavMeshCreateParams params;
+        memset(&params, 0, sizeof(params));
+        params.verts = iv.polyMesh->verts;
+        params.vertCount = iv.polyMesh->nverts;
+        params.polys = iv.polyMesh->polys;
+        params.polyAreas = iv.polyMesh->areas;
+        params.polyFlags = iv.polyMesh->flags;
+        params.polyCount = iv.polyMesh->npolys;
+        params.nvp = iv.polyMesh->nvp;
+        params.detailMeshes = iv.polyMeshDetail->meshes;
+        params.detailVerts = iv.polyMeshDetail->verts;
+        params.detailVertsCount = iv.polyMeshDetail->nverts;
+        params.detailTris = iv.polyMeshDetail->tris;
+        params.detailTriCount = iv.polyMeshDetail->ntris;
+
+        params.offMeshConVerts = meshData.offMeshConnections.getCArray();
+        params.offMeshConCount = meshData.offMeshConnections.size() / 6;
+        params.offMeshConRad = meshData.offMeshConnectionRads.getCArray();
+        params.offMeshConDir = meshData.offMeshConnectionDirs.getCArray();
+        params.offMeshConAreas = meshData.offMeshConnectionsAreas.getCArray();
+        params.offMeshConFlags = meshData.offMeshConnectionsFlags.getCArray();
+
+        params.walkableHeight = BASE_UNIT_DIM * config.walkableHeight;  // agent height
+        params.walkableRadius = BASE_UNIT_DIM * config.walkableRadius;  // agent radius
+        params.walkableClimb = BASE_UNIT_DIM * config.walkableClimb;    // keep less that walkableHeight (aka agent height)!
+        params.tileX = (((bmin[0] + bmax[0]) / 2) - navMesh->getParams()->orig[0]) / GRID_SIZE;
+        params.tileY = (((bmin[2] + bmax[2]) / 2) - navMesh->getParams()->orig[2]) / GRID_SIZE;
+        rcVcopy(params.bmin, bmin);
+        rcVcopy(params.bmax, bmax);
+        params.cs = config.cs;
+        params.ch = config.ch;
+        params.tileLayer = 0;
+        params.buildBvTree = true;
+
+        // will hold final navmesh
+        unsigned char* navData = NULL;
+        int navDataSize = 0;
+
+        do
+        {
+            // these values are checked within dtCreateNavMeshData - handle them here
+            // so we have a clear error message
+            if (params.nvp > DT_VERTS_PER_POLYGON)
+            {
+                printf("%s Invalid verts-per-polygon value!        \n", tileString);
+                continue;
+            }
+            if (params.vertCount >= 0xffff)
+            {
+                printf("%s Too many vertices!                      \n", tileString);
+                continue;
+            }
+            if (!params.vertCount || !params.verts)
+            {
+                // occurs mostly when adjacent tiles have models
+                // loaded but those models don't span into this tile
+
+                // message is an annoyance
+                //printf("%sNo vertices to build tile!              \n", tileString);
+                continue;
+            }
+            if (!params.polyCount || !params.polys ||
+                TILES_PER_MAP * TILES_PER_MAP == params.polyCount)
+            {
+                // we have flat tiles with no actual geometry - don't build those, its useless
+                // keep in mind that we do output those into debug info
+                // drop tiles with only exact count - some tiles may have geometry while having less tiles
+                printf(" No polygons to build on tile - %s              \n", tileString);
+                continue;
+            }
+            if (!params.detailMeshes || !params.detailVerts || !params.detailTris)
+            {
+                printf(" No detail mesh to build tile - %s           \n", tileString);
+                continue;
+            }
+
+            if (!dtCreateNavMeshData(&params, &navData, &navDataSize))
+            {
+                printf(" Failed building navmesh tile - %s           \n", tileString);
+                continue;
+            }
+
+            dtTileRef tileRef = 0;
+            // DT_TILE_FREE_DATA tells detour to unallocate memory when the tile
+            // is removed via removeTile()
+            dtStatus dtResult = navMesh->addTile(navData, navDataSize, DT_TILE_FREE_DATA, 0, &tileRef);
+            if (!tileRef || dtStatusFailed(dtResult))
+            {
+                printf(" Failed adding tile %s to navmesh !           \n", tileString);
+                continue;
+            }
+
+            // file output
+            char fileName[255];
+            sprintf(fileName, "mmaps/%03u%02i%02i.mmtile", mapID, tileY, tileX);
+            FILE* file = fopen(fileName, "wb");
+            if (!file)
+            {
+                char message[1024];
+                sprintf(message, "Failed to open %s for writing!\n", fileName);
+                perror(message);
+                navMesh->removeTile(tileRef, NULL, NULL);
+                continue;
+            }
+
+            // write header
+            MmapTileHeader header;
+            header.usesLiquids = m_terrainBuilder->usesLiquids();
+            header.size = uint32(navDataSize);
+            fwrite(&header, sizeof(MmapTileHeader), 1, file);
+
+            // write data
+            fwrite(navData, sizeof(unsigned char), navDataSize, file);
+            fclose(file);
+
+            // now that tile is written to disk, we can unload it
+            navMesh->removeTile(tileRef, NULL, NULL);
+        }
+        while (0);
+
+        if (m_debugOutput)
+        {
+            // restore padding so that the debug visualization is correct
+            for (int i = 0; i < iv.polyMesh->nverts; ++i)
+            {
+                unsigned short* v = &iv.polyMesh->verts[i * 3];
+                v[0] += (unsigned short)config.borderSize;
+                v[2] += (unsigned short)config.borderSize;
+            }
+
+            iv.generateObjFile(mapID, tileX, tileY, meshData);
+            iv.writeIV(mapID, tileX, tileY);
+        }
+    }
+
+    /**************************************************************************/
+    void MapBuilder::getTileBounds(int tileX, int tileY, float* verts, int vertCount, float* bmin, float* bmax)
+    {
+        // this is for elevation
+        if (verts && vertCount)
+        {
+            rcCalcBounds(verts, vertCount, bmin, bmax);
+        }
+        else
+        {
+            bmin[1] = FLT_MIN;
+            bmax[1] = FLT_MAX;
+        }
+
+        // this is for width and depth
+        bmax[0] = (32 - int(tileX)) * GRID_SIZE;
+        bmax[2] = (32 - int(tileY)) * GRID_SIZE;
+        bmin[0] = bmax[0] - GRID_SIZE;
+        bmin[2] = bmax[2] - GRID_SIZE;
+    }
+
+    /**************************************************************************/
+    bool MapBuilder::shouldSkipTile(int mapID, int tileX, int tileY)
+    {
+        char fileName[255];
+        sprintf(fileName, "mmaps/%03u%02i%02i.mmtile", mapID, tileY, tileX);
+        FILE* file = fopen(fileName, "rb");
+        if (!file)
+        {
+            return false;
+        }
+
+        MmapTileHeader header;
+        size_t file_read = fread(&header, sizeof(MmapTileHeader), 1, file);
+        fclose(file);
+
+        if (header.mmapMagic != MMAP_MAGIC || header.dtVersion != DT_NAVMESH_VERSION || file_read <= 0)
+        {
+            return false;
+        }
+
+        if (header.mmapVersion != MMAP_VERSION)
+        {
+            return false;
+        }
+
+        return true;
+    }
+}