src/mapsector.cpp

   1 /*
   2 Minetest-c55
   3 Copyright (C) 2010 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 General Public License as published by
   7 the Free Software Foundation; either version 2 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 General Public License for more details.
  14
  15 You should have received a copy of the GNU 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 #include "client.h"
  23 #include "exceptions.h"
  24 #include "mapblock.h"
  25
  26 MapSector::MapSector(Map *parent, v2s16 pos):
  27                 differs_from_disk(false),
  28                 m_parent(parent),
  29                 m_pos(pos),
  30                 m_block_cache(NULL)
  31 {
  32 }
  33
  34 MapSector::~MapSector()
  35 {
  36         deleteBlocks();
  37 }
  38
  39 void MapSector::deleteBlocks()
  40 {
  41         // Clear cache
  42         m_block_cache = NULL;
  43
  44         // Delete all
  45         core::map<s16, MapBlock*>::Iterator i = m_blocks.getIterator();
  46         for(; i.atEnd() == false; i++)
  47         {
  48                 delete i.getNode()->getValue();
  49         }
  50
  51         // Clear container
  52         m_blocks.clear();
  53 }
  54
  55 MapBlock * MapSector::getBlockBuffered(s16 y)
  56 {
  57         MapBlock *block;
  58
  59         if(m_block_cache != NULL && y == m_block_cache_y){
  60                 return m_block_cache;
  61         }
  62
  63         // If block doesn't exist, return NULL
  64         core::map<s16, MapBlock*>::Node *n = m_blocks.find(y);
  65         if(n == NULL)
  66         {
  67                 block = NULL;
  68         }
  69         // If block exists, return it
  70         else{
  71                 block = n->getValue();
  72         }
  73
  74         // Cache the last result
  75         m_block_cache_y = y;
  76         m_block_cache = block;
  77
  78         return block;
  79 }
  80
  81 MapBlock * MapSector::getBlockNoCreateNoEx(s16 y)
  82 {
  83         return getBlockBuffered(y);
  84 }
  85
  86 MapBlock * MapSector::createBlankBlockNoInsert(s16 y)
  87 {
  88         assert(getBlockBuffered(y) == NULL);
  89
  90         v3s16 blockpos_map(m_pos.X, y, m_pos.Y);
  91
  92         MapBlock *block = new MapBlock(m_parent, blockpos_map);
  93
  94         return block;
  95 }
  96
  97 MapBlock * MapSector::createBlankBlock(s16 y)
  98 {
  99         MapBlock *block = createBlankBlockNoInsert(y);
 100
 101         m_blocks.insert(y, block);
 102
 103         return block;
 104 }
 105
 106 void MapSector::insertBlock(MapBlock *block)
 107 {
 108         s16 block_y = block->getPos().Y;
 109
 110         MapBlock *block2 = getBlockBuffered(block_y);
 111         if(block2 != NULL){
 112                 throw AlreadyExistsException("Block already exists");
 113         }
 114
 115         v2s16 p2d(block->getPos().X, block->getPos().Z);
 116         assert(p2d == m_pos);
 117
 118         // Insert into container
 119         m_blocks.insert(block_y, block);
 120 }
 121
 122 void MapSector::deleteBlock(MapBlock *block)
 123 {
 124         s16 block_y = block->getPos().Y;
 125
 126         // Clear from cache
 127         m_block_cache = NULL;
 128
 129         // Remove from container
 130         m_blocks.remove(block_y);
 131
 132         // Delete
 133         delete block;
 134 }
 135
 136 void MapSector::getBlocks(core::list<MapBlock*> &dest)
 137 {
 138         core::list<MapBlock*> ref_list;
 139
 140         core::map<s16, MapBlock*>::Iterator bi;
 141
 142         bi = m_blocks.getIterator();
 143         for(; bi.atEnd() == false; bi++)
 144         {
 145                 MapBlock *b = bi.getNode()->getValue();
 146                 dest.push_back(b);
 147         }
 148 }
 149
 150 /*
 151         ServerMapSector
 152 */
 153
 154 ServerMapSector::ServerMapSector(Map *parent, v2s16 pos):
 155                 MapSector(parent, pos)
 156 {
 157 }
 158
 159 ServerMapSector::~ServerMapSector()
 160 {
 161 }
 162
 163 void ServerMapSector::serialize(std::ostream &os, u8 version)
 164 {
 165         if(!ser_ver_supported(version))
 166                 throw VersionMismatchException("ERROR: MapSector format not supported");
 167
 168         /*
 169                 [0] u8 serialization version
 170                 + heightmap data
 171         */
 172
 173         // Server has both of these, no need to support not having them.
 174         //assert(m_objects != NULL);
 175
 176         // Write version
 177         os.write((char*)&version, 1);
 178
 179         /*
 180                 Add stuff here, if needed
 181         */
 182
 183 }
 184
 185 ServerMapSector* ServerMapSector::deSerialize(
 186                 std::istream &is,
 187                 Map *parent,
 188                 v2s16 p2d,
 189                 core::map<v2s16, MapSector*> & sectors
 190         )
 191 {
 192         /*
 193                 [0] u8 serialization version
 194                 + heightmap data
 195         */
 196
 197         /*
 198                 Read stuff
 199         */
 200
 201         // Read version
 202         u8 version = SER_FMT_VER_INVALID;
 203         is.read((char*)&version, 1);
 204
 205         if(!ser_ver_supported(version))
 206                 throw VersionMismatchException("ERROR: MapSector format not supported");
 207
 208         /*
 209                 Add necessary reading stuff here
 210         */
 211
 212         /*
 213                 Get or create sector
 214         */
 215
 216         ServerMapSector *sector = NULL;
 217
 218         core::map<v2s16, MapSector*>::Node *n = sectors.find(p2d);
 219
 220         if(n != NULL)
 221         {
 222                 dstream<<"WARNING: deSerializing existent sectors not supported "
 223                                 "at the moment, because code hasn't been tested."
 224                                 <<std::endl;
 225
 226                 MapSector *sector = n->getValue();
 227                 assert(sector->getId() == MAPSECTOR_SERVER);
 228                 return (ServerMapSector*)sector;
 229         }
 230         else
 231         {
 232                 sector = new ServerMapSector(parent, p2d);
 233                 sectors.insert(p2d, sector);
 234         }
 235
 236         /*
 237                 Set stuff in sector
 238         */
 239
 240         // Nothing here
 241
 242         return sector;
 243 }
 244
 245 #ifndef SERVER
 246 /*
 247         ClientMapSector
 248 */
 249
 250 ClientMapSector::ClientMapSector(Map *parent, v2s16 pos):
 251                 MapSector(parent, pos)
 252 {
 253 }
 254
 255 ClientMapSector::~ClientMapSector()
 256 {
 257 }
 258
 259 #endif // !SERVER
 260
 261 //END