src/mapsector.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "mapsector.h"
  21 #include "jmutexautolock.h"
  22 #ifndef SERVER
  23 #include "client.h"
  24 #endif
  25 #include "exceptions.h"
  26 #include "mapblock.h"
  27
  28 MapSector::MapSector(Map *parent, v2s16 pos, IGameDef *gamedef):
  29                 differs_from_disk(false),
  30                 m_parent(parent),
  31                 m_pos(pos),
  32                 m_gamedef(gamedef),
  33                 m_block_cache(NULL)
  34 {
  35 }
  36
  37 MapSector::~MapSector()
  38 {
  39         deleteBlocks();
  40 }
  41
  42 void MapSector::deleteBlocks()
  43 {
  44         // Clear cache
  45         m_block_cache = NULL;
  46
  47         // Delete all
  48         for(std::map<s16, MapBlock*>::iterator i = m_blocks.begin();
  49                 i != m_blocks.end(); ++i)
  50         {
  51                 delete i->second;
  52         }
  53
  54         // Clear container
  55         m_blocks.clear();
  56 }
  57
  58 MapBlock * MapSector::getBlockBuffered(s16 y)
  59 {
  60         MapBlock *block;
  61
  62         if(m_block_cache != NULL && y == m_block_cache_y){
  63                 return m_block_cache;
  64         }
  65
  66         // If block doesn't exist, return NULL
  67         std::map<s16, MapBlock*>::iterator n = m_blocks.find(y);
  68         if(n == m_blocks.end())
  69         {
  70                 block = NULL;
  71         }
  72         // If block exists, return it
  73         else{
  74                 block = n->second;
  75         }
  76
  77         // Cache the last result
  78         m_block_cache_y = y;
  79         m_block_cache = block;
  80
  81         return block;
  82 }
  83
  84 MapBlock * MapSector::getBlockNoCreateNoEx(s16 y)
  85 {
  86         return getBlockBuffered(y);
  87 }
  88
  89 MapBlock * MapSector::createBlankBlockNoInsert(s16 y)
  90 {
  91         assert(getBlockBuffered(y) == NULL);
  92
  93         v3s16 blockpos_map(m_pos.X, y, m_pos.Y);
  94
  95         MapBlock *block = new MapBlock(m_parent, blockpos_map, m_gamedef);
  96
  97         return block;
  98 }
  99
 100 MapBlock * MapSector::createBlankBlock(s16 y)
 101 {
 102         MapBlock *block = createBlankBlockNoInsert(y);
 103
 104         m_blocks[y] = block;
 105
 106         return block;
 107 }
 108
 109 void MapSector::insertBlock(MapBlock *block)
 110 {
 111         s16 block_y = block->getPos().Y;
 112
 113         MapBlock *block2 = getBlockBuffered(block_y);
 114         if(block2 != NULL){
 115                 throw AlreadyExistsException("Block already exists");
 116         }
 117
 118         v2s16 p2d(block->getPos().X, block->getPos().Z);
 119         assert(p2d == m_pos);
 120
 121         // Insert into container
 122         m_blocks[block_y] = block;
 123 }
 124
 125 void MapSector::deleteBlock(MapBlock *block)
 126 {
 127         s16 block_y = block->getPos().Y;
 128
 129         // Clear from cache
 130         m_block_cache = NULL;
 131
 132         // Remove from container
 133         m_blocks.erase(block_y);
 134
 135         // Delete
 136         delete block;
 137 }
 138
 139 void MapSector::getBlocks(std::list<MapBlock*> &dest)
 140 {
 141         for(std::map<s16, MapBlock*>::iterator bi = m_blocks.begin();
 142                 bi != m_blocks.end(); ++bi)
 143         {
 144                 dest.push_back(bi->second);
 145         }
 146 }
 147
 148 /*
 149         ServerMapSector
 150 */
 151
 152 ServerMapSector::ServerMapSector(Map *parent, v2s16 pos, IGameDef *gamedef):
 153                 MapSector(parent, pos, gamedef)
 154 {
 155 }
 156
 157 ServerMapSector::~ServerMapSector()
 158 {
 159 }
 160
 161 void ServerMapSector::serialize(std::ostream &os, u8 version)
 162 {
 163         if(!ser_ver_supported(version))
 164                 throw VersionMismatchException("ERROR: MapSector format not supported");
 165
 166         /*
 167                 [0] u8 serialization version
 168                 + heightmap data
 169         */
 170
 171         // Server has both of these, no need to support not having them.
 172         //assert(m_objects != NULL);
 173
 174         // Write version
 175         os.write((char*)&version, 1);
 176
 177         /*
 178                 Add stuff here, if needed
 179         */
 180
 181 }
 182
 183 ServerMapSector* ServerMapSector::deSerialize(
 184                 std::istream &is,
 185                 Map *parent,
 186                 v2s16 p2d,
 187                 std::map<v2s16, MapSector*> & sectors,
 188                 IGameDef *gamedef
 189         )
 190 {
 191         /*
 192                 [0] u8 serialization version
 193                 + heightmap data
 194         */
 195
 196         /*
 197                 Read stuff
 198         */
 199
 200         // Read version
 201         u8 version = SER_FMT_VER_INVALID;
 202         is.read((char*)&version, 1);
 203
 204         if(!ser_ver_supported(version))
 205                 throw VersionMismatchException("ERROR: MapSector format not supported");
 206
 207         /*
 208                 Add necessary reading stuff here
 209         */
 210
 211         /*
 212                 Get or create sector
 213         */
 214
 215         ServerMapSector *sector = NULL;
 216
 217         std::map<v2s16, MapSector*>::iterator n = sectors.find(p2d);
 218
 219         if(n != sectors.end())
 220         {
 221                 dstream<<"WARNING: deSerializing existent sectors not supported "
 222                                 "at the moment, because code hasn't been tested."
 223                                 <<std::endl;
 224
 225                 MapSector *sector = n->second;
 226                 assert(sector->getId() == MAPSECTOR_SERVER);
 227                 return (ServerMapSector*)sector;
 228         }
 229         else
 230         {
 231                 sector = new ServerMapSector(parent, p2d, gamedef);
 232                 sectors[p2d] = sector;
 233         }
 234
 235         /*
 236                 Set stuff in sector
 237         */
 238
 239         // Nothing here
 240
 241         return sector;
 242 }
 243
 244 #ifndef SERVER
 245 /*
 246         ClientMapSector
 247 */
 248
 249 ClientMapSector::ClientMapSector(Map *parent, v2s16 pos, IGameDef *gamedef):
 250                 MapSector(parent, pos, gamedef)
 251 {
 252 }
 253
 254 ClientMapSector::~ClientMapSector()
 255 {
 256 }
 257
 258 #endif // !SERVER
 259
 260 //END