src/map.h

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2013 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 #pragma once
  21
  22 #include <iostream>
  23 #include <sstream>
  24 #include <set>
  25 #include <map>
  26 #include <list>
  27
  28 #include "irrlichttypes_bloated.h"
  29 #include "mapnode.h"
  30 #include "constants.h"
  31 #include "voxel.h"
  32 #include "modifiedstate.h"
  33 #include "util/container.h"
  34 #include "util/metricsbackend.h"
  35 #include "nodetimer.h"
  36 #include "map_settings_manager.h"
  37 #include "debug.h"
  38
  39 class Settings;
  40 class MapDatabase;
  41 class ClientMap;
  42 class MapSector;
  43 class ServerMapSector;
  44 class MapBlock;
  45 class NodeMetadata;
  46 class IGameDef;
  47 class IRollbackManager;
  48 class EmergeManager;
  49 class MetricsBackend;
  50 class ServerEnvironment;
  51 struct BlockMakeData;
  52
  53 /*
  54         MapEditEvent
  55 */
  56
  57 #define MAPTYPE_BASE 0
  58 #define MAPTYPE_SERVER 1
  59 #define MAPTYPE_CLIENT 2
  60
  61 enum MapEditEventType{
  62         // Node added (changed from air or something else to something)
  63         MEET_ADDNODE,
  64         // Node removed (changed to air)
  65         MEET_REMOVENODE,
  66         // Node swapped (changed without metadata change)
  67         MEET_SWAPNODE,
  68         // Node metadata changed
  69         MEET_BLOCK_NODE_METADATA_CHANGED,
  70         // Anything else (modified_blocks are set unsent)
  71         MEET_OTHER
  72 };
  73
  74 struct MapEditEvent
  75 {
  76         MapEditEventType type = MEET_OTHER;
  77         v3s16 p;
  78         MapNode n = CONTENT_AIR;
  79         std::set<v3s16> modified_blocks;
  80         bool is_private_change = false;
  81
  82         MapEditEvent() = default;
  83
  84         VoxelArea getArea() const
  85         {
  86                 switch(type){
  87                 case MEET_ADDNODE:
  88                         return VoxelArea(p);
  89                 case MEET_REMOVENODE:
  90                         return VoxelArea(p);
  91                 case MEET_SWAPNODE:
  92                         return VoxelArea(p);
  93                 case MEET_BLOCK_NODE_METADATA_CHANGED:
  94                 {
  95                         v3s16 np1 = p*MAP_BLOCKSIZE;
  96                         v3s16 np2 = np1 + v3s16(1,1,1)*MAP_BLOCKSIZE - v3s16(1,1,1);
  97                         return VoxelArea(np1, np2);
  98                 }
  99                 case MEET_OTHER:
 100                 {
 101                         VoxelArea a;
 102                         for (v3s16 p : modified_blocks) {
 103                                 v3s16 np1 = p*MAP_BLOCKSIZE;
 104                                 v3s16 np2 = np1 + v3s16(1,1,1)*MAP_BLOCKSIZE - v3s16(1,1,1);
 105                                 a.addPoint(np1);
 106                                 a.addPoint(np2);
 107                         }
 108                         return a;
 109                 }
 110                 }
 111                 return VoxelArea();
 112         }
 113 };
 114
 115 class MapEventReceiver
 116 {
 117 public:
 118         // event shall be deleted by caller after the call.
 119         virtual void onMapEditEvent(const MapEditEvent &event) = 0;
 120 };
 121
 122 class Map /*: public NodeContainer*/
 123 {
 124 public:
 125
 126         Map(IGameDef *gamedef);
 127         virtual ~Map();
 128         DISABLE_CLASS_COPY(Map);
 129
 130         virtual s32 mapType() const
 131         {
 132                 return MAPTYPE_BASE;
 133         }
 134
 135         /*
 136                 Drop (client) or delete (server) the map.
 137         */
 138         virtual void drop()
 139         {
 140                 delete this;
 141         }
 142
 143         void addEventReceiver(MapEventReceiver *event_receiver);
 144         void removeEventReceiver(MapEventReceiver *event_receiver);
 145         // event shall be deleted by caller after the call.
 146         void dispatchEvent(const MapEditEvent &event);
 147
 148         // On failure returns NULL
 149         MapSector * getSectorNoGenerateNoLock(v2s16 p2d);
 150         // Same as the above (there exists no lock anymore)
 151         MapSector * getSectorNoGenerate(v2s16 p2d);
 152
 153         /*
 154                 This is overloaded by ClientMap and ServerMap to allow
 155                 their differing fetch methods.
 156         */
 157         virtual MapSector * emergeSector(v2s16 p){ return NULL; }
 158
 159         // Returns InvalidPositionException if not found
 160         MapBlock * getBlockNoCreate(v3s16 p);
 161         // Returns NULL if not found
 162         MapBlock * getBlockNoCreateNoEx(v3s16 p);
 163
 164         void listAllLoadedBlocks(std::vector<v3s16> &dst);
 165
 166         /* Server overrides */
 167         virtual MapBlock * emergeBlock(v3s16 p, bool create_blank=true)
 168         { return getBlockNoCreateNoEx(p); }
 169
 170         inline const NodeDefManager * getNodeDefManager() { return m_nodedef; }
 171
 172         // Returns InvalidPositionException if not found
 173         bool isNodeUnderground(v3s16 p);
 174
 175         bool isValidPosition(v3s16 p);
 176
 177         // throws InvalidPositionException if not found
 178         void setNode(v3s16 p, MapNode & n);
 179
 180         // Returns a CONTENT_IGNORE node if not found
 181         // If is_valid_position is not NULL then this will be set to true if the
 182         // position is valid, otherwise false
 183         MapNode getNode(v3s16 p, bool *is_valid_position = NULL);
 184
 185         /*
 186                 These handle lighting but not faces.
 187         */
 188         void addNodeAndUpdate(v3s16 p, MapNode n,
 189                         std::map<v3s16, MapBlock*> &modified_blocks,
 190                         bool remove_metadata = true);
 191         void removeNodeAndUpdate(v3s16 p,
 192                         std::map<v3s16, MapBlock*> &modified_blocks);
 193
 194         /*
 195                 Wrappers for the latter ones.
 196                 These emit events.
 197                 Return true if succeeded, false if not.
 198         */
 199         bool addNodeWithEvent(v3s16 p, MapNode n, bool remove_metadata = true);
 200         bool removeNodeWithEvent(v3s16 p);
 201
 202         // Call these before and after saving of many blocks
 203         virtual void beginSave() {}
 204         virtual void endSave() {}
 205
 206         virtual void save(ModifiedState save_level) { FATAL_ERROR("FIXME"); }
 207
 208         // Server implements these.
 209         // Client leaves them as no-op.
 210         virtual bool saveBlock(MapBlock *block) { return false; }
 211         virtual bool deleteBlock(v3s16 blockpos) { return false; }
 212
 213         /*
 214                 Updates usage timers and unloads unused blocks and sectors.
 215                 Saves modified blocks before unloading on MAPTYPE_SERVER.
 216         */
 217         void timerUpdate(float dtime, float unload_timeout, u32 max_loaded_blocks,
 218                         std::vector<v3s16> *unloaded_blocks=NULL);
 219
 220         /*
 221                 Unloads all blocks with a zero refCount().
 222                 Saves modified blocks before unloading on MAPTYPE_SERVER.
 223         */
 224         void unloadUnreferencedBlocks(std::vector<v3s16> *unloaded_blocks=NULL);
 225
 226         // Deletes sectors and their blocks from memory
 227         // Takes cache into account
 228         // If deleted sector is in sector cache, clears cache
 229         void deleteSectors(std::vector<v2s16> &list);
 230
 231         // For debug printing. Prints "Map: ", "ServerMap: " or "ClientMap: "
 232         virtual void PrintInfo(std::ostream &out);
 233
 234         void transformLiquids(std::map<v3s16, MapBlock*> & modified_blocks,
 235                         ServerEnvironment *env);
 236
 237         /*
 238                 Node metadata
 239                 These are basically coordinate wrappers to MapBlock
 240         */
 241
 242         std::vector<v3s16> findNodesWithMetadata(v3s16 p1, v3s16 p2);
 243         NodeMetadata *getNodeMetadata(v3s16 p);
 244
 245         /**
 246          * Sets metadata for a node.
 247          * This method sets the metadata for a given node.
 248          * On success, it returns @c true and the object pointed to
 249          * by @p meta is then managed by the system and should
 250          * not be deleted by the caller.
 251          *
 252          * In case of failure, the method returns @c false and the
 253          * caller is still responsible for deleting the object!
 254          *
 255          * @param p node coordinates
 256          * @param meta pointer to @c NodeMetadata object
 257          * @return @c true on success, false on failure
 258          */
 259         bool setNodeMetadata(v3s16 p, NodeMetadata *meta);
 260         void removeNodeMetadata(v3s16 p);
 261
 262         /*
 263                 Node Timers
 264                 These are basically coordinate wrappers to MapBlock
 265         */
 266
 267         NodeTimer getNodeTimer(v3s16 p);
 268         void setNodeTimer(const NodeTimer &t);
 269         void removeNodeTimer(v3s16 p);
 270
 271         /*
 272                 Variables
 273         */
 274
 275         void transforming_liquid_add(v3s16 p);
 276
 277         bool isBlockOccluded(MapBlock *block, v3s16 cam_pos_nodes);
 278 protected:
 279         friend class LuaVoxelManip;
 280
 281         IGameDef *m_gamedef;
 282
 283         std::set<MapEventReceiver*> m_event_receivers;
 284
 285         std::map<v2s16, MapSector*> m_sectors;
 286
 287         // Be sure to set this to NULL when the cached sector is deleted
 288         MapSector *m_sector_cache = nullptr;
 289         v2s16 m_sector_cache_p;
 290
 291         // Queued transforming water nodes
 292         UniqueQueue<v3s16> m_transforming_liquid;
 293
 294         // This stores the properties of the nodes on the map.
 295         const NodeDefManager *m_nodedef;
 296
 297         bool determineAdditionalOcclusionCheck(const v3s16 &pos_camera,
 298                 const core::aabbox3d<s16> &block_bounds, v3s16 &check);
 299         bool isOccluded(const v3s16 &pos_camera, const v3s16 &pos_target,
 300                 float step, float stepfac, float start_offset, float end_offset,
 301                 u32 needed_count);
 302
 303 private:
 304         f32 m_transforming_liquid_loop_count_multiplier = 1.0f;
 305         u32 m_unprocessed_count = 0;
 306         u64 m_inc_trending_up_start_time = 0; // milliseconds
 307         bool m_queue_size_timer_started = false;
 308 };
 309
 310 /*
 311         ServerMap
 312
 313         This is the only map class that is able to generate map.
 314 */
 315
 316 class ServerMap : public Map
 317 {
 318 public:
 319         /*
 320                 savedir: directory to which map data should be saved
 321         */
 322         ServerMap(const std::string &savedir, IGameDef *gamedef, EmergeManager *emerge, MetricsBackend *mb);
 323         ~ServerMap();
 324
 325         s32 mapType() const
 326         {
 327                 return MAPTYPE_SERVER;
 328         }
 329
 330         /*
 331                 Get a sector from somewhere.
 332                 - Check memory
 333                 - Check disk (doesn't load blocks)
 334                 - Create blank one
 335         */
 336         MapSector *createSector(v2s16 p);
 337
 338         /*
 339                 Blocks are generated by using these and makeBlock().
 340         */
 341         bool blockpos_over_mapgen_limit(v3s16 p);
 342         bool initBlockMake(v3s16 blockpos, BlockMakeData *data);
 343         void finishBlockMake(BlockMakeData *data,
 344                 std::map<v3s16, MapBlock*> *changed_blocks);
 345
 346         /*
 347                 Get a block from somewhere.
 348                 - Memory
 349                 - Create blank
 350         */
 351         MapBlock *createBlock(v3s16 p);
 352
 353         /*
 354                 Forcefully get a block from somewhere.
 355                 - Memory
 356                 - Load from disk
 357                 - Create blank filled with CONTENT_IGNORE
 358
 359         */
 360         MapBlock *emergeBlock(v3s16 p, bool create_blank=true);
 361
 362         /*
 363                 Try to get a block.
 364                 If it does not exist in memory, add it to the emerge queue.
 365                 - Memory
 366                 - Emerge Queue (deferred disk or generate)
 367         */
 368         MapBlock *getBlockOrEmerge(v3s16 p3d);
 369
 370         /*
 371                 Database functions
 372         */
 373         static MapDatabase *createDatabase(const std::string &name, const std::string &savedir, Settings &conf);
 374
 375         // Call these before and after saving of blocks
 376         void beginSave();
 377         void endSave();
 378
 379         void save(ModifiedState save_level);
 380         void listAllLoadableBlocks(std::vector<v3s16> &dst);
 381
 382         MapgenParams *getMapgenParams();
 383
 384         bool saveBlock(MapBlock *block);
 385         static bool saveBlock(MapBlock *block, MapDatabase *db);
 386         MapBlock* loadBlock(v3s16 p);
 387         // Database version
 388         void loadBlock(std::string *blob, v3s16 p3d, MapSector *sector, bool save_after_load=false);
 389
 390         bool deleteBlock(v3s16 blockpos);
 391
 392         void updateVManip(v3s16 pos);
 393
 394         // For debug printing
 395         virtual void PrintInfo(std::ostream &out);
 396
 397         bool isSavingEnabled(){ return m_map_saving_enabled; }
 398
 399         u64 getSeed();
 400
 401         /*!
 402          * Fixes lighting in one map block.
 403          * May modify other blocks as well, as light can spread
 404          * out of the specified block.
 405          * Returns false if the block is not generated (so nothing
 406          * changed), true otherwise.
 407          */
 408         bool repairBlockLight(v3s16 blockpos,
 409                 std::map<v3s16, MapBlock *> *modified_blocks);
 410
 411         MapSettingsManager settings_mgr;
 412
 413 private:
 414         // Emerge manager
 415         EmergeManager *m_emerge;
 416
 417         std::string m_savedir;
 418         bool m_map_saving_enabled;
 419
 420 #if 0
 421         // Chunk size in MapSectors
 422         // If 0, chunks are disabled.
 423         s16 m_chunksize;
 424         // Chunks
 425         core::map<v2s16, MapChunk*> m_chunks;
 426 #endif
 427         std::set<v3s16> m_chunks_in_progress;
 428
 429         /*
 430                 Metadata is re-written on disk only if this is true.
 431                 This is reset to false when written on disk.
 432         */
 433         bool m_map_metadata_changed = true;
 434         MapDatabase *dbase = nullptr;
 435         MapDatabase *dbase_ro = nullptr;
 436
 437         MetricCounterPtr m_save_time_counter;
 438 };
 439
 440
 441 #define VMANIP_BLOCK_DATA_INEXIST     1
 442 #define VMANIP_BLOCK_CONTAINS_CIGNORE 2
 443
 444 class MMVManip : public VoxelManipulator
 445 {
 446 public:
 447         MMVManip(Map *map);
 448         virtual ~MMVManip() = default;
 449
 450         virtual void clear()
 451         {
 452                 VoxelManipulator::clear();
 453                 m_loaded_blocks.clear();
 454         }
 455
 456         void initialEmerge(v3s16 blockpos_min, v3s16 blockpos_max,
 457                 bool load_if_inexistent = true);
 458
 459         // This is much faster with big chunks of generated data
 460         void blitBackAll(std::map<v3s16, MapBlock*> * modified_blocks,
 461                 bool overwrite_generated = true);
 462
 463         bool m_is_dirty = false;
 464
 465 protected:
 466         Map *m_map;
 467         /*
 468                 key = blockpos
 469                 value = flags describing the block
 470         */
 471         std::map<v3s16, u8> m_loaded_blocks;
 472 };