src/map.cpp

   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 #include "map.h"
  21 #include "mapsector.h"
  22 #include "mapblock.h"
  23 #include "filesys.h"
  24 #include "voxel.h"
  25 #include "voxelalgorithms.h"
  26 #include "porting.h"
  27 #include "serialization.h"
  28 #include "nodemetadata.h"
  29 #include "settings.h"
  30 #include "log.h"
  31 #include "profiler.h"
  32 #include "nodedef.h"
  33 #include "gamedef.h"
  34 #include "util/directiontables.h"
  35 #include "util/basic_macros.h"
  36 #include "rollback_interface.h"
  37 #include "environment.h"
  38 #include "reflowscan.h"
  39 #include "emerge.h"
  40 #include "mapgen/mapgen_v6.h"
  41 #include "mapgen/mg_biome.h"
  42 #include "config.h"
  43 #include "server.h"
  44 #include "database/database.h"
  45 #include "database/database-dummy.h"
  46 #include "database/database-sqlite3.h"
  47 #include "script/scripting_server.h"
  48 #include <deque>
  49 #include <queue>
  50 #if USE_LEVELDB
  51 #include "database/database-leveldb.h"
  52 #endif
  53 #if USE_REDIS
  54 #include "database/database-redis.h"
  55 #endif
  56 #if USE_POSTGRESQL
  57 #include "database/database-postgresql.h"
  58 #endif
  59
  60
  61 /*
  62         Map
  63 */
  64
  65 Map::Map(std::ostream &dout, IGameDef *gamedef):
  66         m_dout(dout),
  67         m_gamedef(gamedef),
  68         m_nodedef(gamedef->ndef())
  69 {
  70 }
  71
  72 Map::~Map()
  73 {
  74         /*
  75                 Free all MapSectors
  76         */
  77         for (auto &sector : m_sectors) {
  78                 delete sector.second;
  79         }
  80 }
  81
  82 void Map::addEventReceiver(MapEventReceiver *event_receiver)
  83 {
  84         m_event_receivers.insert(event_receiver);
  85 }
  86
  87 void Map::removeEventReceiver(MapEventReceiver *event_receiver)
  88 {
  89         m_event_receivers.erase(event_receiver);
  90 }
  91
  92 void Map::dispatchEvent(MapEditEvent *event)
  93 {
  94         for (MapEventReceiver *event_receiver : m_event_receivers) {
  95                 event_receiver->onMapEditEvent(event);
  96         }
  97 }
  98
  99 MapSector * Map::getSectorNoGenerateNoExNoLock(v2s16 p)
 100 {
 101         if(m_sector_cache != NULL && p == m_sector_cache_p){
 102                 MapSector * sector = m_sector_cache;
 103                 return sector;
 104         }
 105
 106         std::map<v2s16, MapSector*>::iterator n = m_sectors.find(p);
 107
 108         if (n == m_sectors.end())
 109                 return NULL;
 110
 111         MapSector *sector = n->second;
 112
 113         // Cache the last result
 114         m_sector_cache_p = p;
 115         m_sector_cache = sector;
 116
 117         return sector;
 118 }
 119
 120 MapSector * Map::getSectorNoGenerateNoEx(v2s16 p)
 121 {
 122         return getSectorNoGenerateNoExNoLock(p);
 123 }
 124
 125 MapSector * Map::getSectorNoGenerate(v2s16 p)
 126 {
 127         MapSector *sector = getSectorNoGenerateNoEx(p);
 128         if(sector == NULL)
 129                 throw InvalidPositionException();
 130
 131         return sector;
 132 }
 133
 134 MapBlock * Map::getBlockNoCreateNoEx(v3s16 p3d)
 135 {
 136         v2s16 p2d(p3d.X, p3d.Z);
 137         MapSector * sector = getSectorNoGenerateNoEx(p2d);
 138         if(sector == NULL)
 139                 return NULL;
 140         MapBlock *block = sector->getBlockNoCreateNoEx(p3d.Y);
 141         return block;
 142 }
 143
 144 MapBlock * Map::getBlockNoCreate(v3s16 p3d)
 145 {
 146         MapBlock *block = getBlockNoCreateNoEx(p3d);
 147         if(block == NULL)
 148                 throw InvalidPositionException();
 149         return block;
 150 }
 151
 152 bool Map::isNodeUnderground(v3s16 p)
 153 {
 154         v3s16 blockpos = getNodeBlockPos(p);
 155         try{
 156                 MapBlock * block = getBlockNoCreate(blockpos);
 157                 return block->getIsUnderground();
 158         }
 159         catch(InvalidPositionException &e)
 160         {
 161                 return false;
 162         }
 163 }
 164
 165 bool Map::isValidPosition(v3s16 p)
 166 {
 167         v3s16 blockpos = getNodeBlockPos(p);
 168         MapBlock *block = getBlockNoCreateNoEx(blockpos);
 169         return (block != NULL);
 170 }
 171
 172 // Returns a CONTENT_IGNORE node if not found
 173 MapNode Map::getNodeNoEx(v3s16 p, bool *is_valid_position)
 174 {
 175         v3s16 blockpos = getNodeBlockPos(p);
 176         MapBlock *block = getBlockNoCreateNoEx(blockpos);
 177         if (block == NULL) {
 178                 if (is_valid_position != NULL)
 179                         *is_valid_position = false;
 180                 return {CONTENT_IGNORE};
 181         }
 182
 183         v3s16 relpos = p - blockpos*MAP_BLOCKSIZE;
 184         bool is_valid_p;
 185         MapNode node = block->getNodeNoCheck(relpos, &is_valid_p);
 186         if (is_valid_position != NULL)
 187                 *is_valid_position = is_valid_p;
 188         return node;
 189 }
 190
 191 #if 0
 192 // Deprecated
 193 // throws InvalidPositionException if not found
 194 // TODO: Now this is deprecated, getNodeNoEx should be renamed
 195 MapNode Map::getNode(v3s16 p)
 196 {
 197         v3s16 blockpos = getNodeBlockPos(p);
 198         MapBlock *block = getBlockNoCreateNoEx(blockpos);
 199         if (block == NULL)
 200                 throw InvalidPositionException();
 201         v3s16 relpos = p - blockpos*MAP_BLOCKSIZE;
 202         bool is_valid_position;
 203         MapNode node = block->getNodeNoCheck(relpos, &is_valid_position);
 204         if (!is_valid_position)
 205                 throw InvalidPositionException();
 206         return node;
 207 }
 208 #endif
 209
 210 // throws InvalidPositionException if not found
 211 void Map::setNode(v3s16 p, MapNode & n)
 212 {
 213         v3s16 blockpos = getNodeBlockPos(p);
 214         MapBlock *block = getBlockNoCreate(blockpos);
 215         v3s16 relpos = p - blockpos*MAP_BLOCKSIZE;
 216         // Never allow placing CONTENT_IGNORE, it fucks up stuff
 217         if(n.getContent() == CONTENT_IGNORE){
 218                 bool temp_bool;
 219                 errorstream<<"Map::setNode(): Not allowing to place CONTENT_IGNORE"
 220                                 <<" while trying to replace \""
 221                                 <<m_nodedef->get(block->getNodeNoCheck(relpos, &temp_bool)).name
 222                                 <<"\" at "<<PP(p)<<" (block "<<PP(blockpos)<<")"<<std::endl;
 223                 return;
 224         }
 225         block->setNodeNoCheck(relpos, n);
 226 }
 227
 228 void Map::addNodeAndUpdate(v3s16 p, MapNode n,
 229                 std::map<v3s16, MapBlock*> &modified_blocks,
 230                 bool remove_metadata)
 231 {
 232         // Collect old node for rollback
 233         RollbackNode rollback_oldnode(this, p, m_gamedef);
 234
 235         // This is needed for updating the lighting
 236         MapNode oldnode = getNodeNoEx(p);
 237
 238         // Remove node metadata
 239         if (remove_metadata) {
 240                 removeNodeMetadata(p);
 241         }
 242
 243         // Set the node on the map
 244         // Ignore light (because calling voxalgo::update_lighting_nodes)
 245         n.setLight(LIGHTBANK_DAY, 0, m_nodedef);
 246         n.setLight(LIGHTBANK_NIGHT, 0, m_nodedef);
 247         setNode(p, n);
 248
 249         // Update lighting
 250         std::vector<std::pair<v3s16, MapNode> > oldnodes;
 251         oldnodes.emplace_back(p, oldnode);
 252         voxalgo::update_lighting_nodes(this, oldnodes, modified_blocks);
 253
 254         for (auto &modified_block : modified_blocks) {
 255                 modified_block.second->expireDayNightDiff();
 256         }
 257
 258         // Report for rollback
 259         if(m_gamedef->rollback())
 260         {
 261                 RollbackNode rollback_newnode(this, p, m_gamedef);
 262                 RollbackAction action;
 263                 action.setSetNode(p, rollback_oldnode, rollback_newnode);
 264                 m_gamedef->rollback()->reportAction(action);
 265         }
 266
 267         /*
 268                 Add neighboring liquid nodes and this node to transform queue.
 269                 (it's vital for the node itself to get updated last, if it was removed.)
 270          */
 271
 272         for (const v3s16 &dir : g_7dirs) {
 273                 v3s16 p2 = p + dir;
 274
 275                 bool is_valid_position;
 276                 MapNode n2 = getNodeNoEx(p2, &is_valid_position);
 277                 if(is_valid_position &&
 278                                 (m_nodedef->get(n2).isLiquid() ||
 279                                 n2.getContent() == CONTENT_AIR))
 280                         m_transforming_liquid.push_back(p2);
 281         }
 282 }
 283
 284 void Map::removeNodeAndUpdate(v3s16 p,
 285                 std::map<v3s16, MapBlock*> &modified_blocks)
 286 {
 287         addNodeAndUpdate(p, MapNode(CONTENT_AIR), modified_blocks, true);
 288 }
 289
 290 bool Map::addNodeWithEvent(v3s16 p, MapNode n, bool remove_metadata)
 291 {
 292         MapEditEvent event;
 293         event.type = remove_metadata ? MEET_ADDNODE : MEET_SWAPNODE;
 294         event.p = p;
 295         event.n = n;
 296
 297         bool succeeded = true;
 298         try{
 299                 std::map<v3s16, MapBlock*> modified_blocks;
 300                 addNodeAndUpdate(p, n, modified_blocks, remove_metadata);
 301
 302                 // Copy modified_blocks to event
 303                 for (auto &modified_block : modified_blocks) {
 304                         event.modified_blocks.insert(modified_block.first);
 305                 }
 306         }
 307         catch(InvalidPositionException &e){
 308                 succeeded = false;
 309         }
 310
 311         dispatchEvent(&event);
 312
 313         return succeeded;
 314 }
 315
 316 bool Map::removeNodeWithEvent(v3s16 p)
 317 {
 318         MapEditEvent event;
 319         event.type = MEET_REMOVENODE;
 320         event.p = p;
 321
 322         bool succeeded = true;
 323         try{
 324                 std::map<v3s16, MapBlock*> modified_blocks;
 325                 removeNodeAndUpdate(p, modified_blocks);
 326
 327                 // Copy modified_blocks to event
 328                 for (auto &modified_block : modified_blocks) {
 329                         event.modified_blocks.insert(modified_block.first);
 330                 }
 331         }
 332         catch(InvalidPositionException &e){
 333                 succeeded = false;
 334         }
 335
 336         dispatchEvent(&event);
 337
 338         return succeeded;
 339 }
 340
 341 struct TimeOrderedMapBlock {
 342         MapSector *sect;
 343         MapBlock *block;
 344
 345         TimeOrderedMapBlock(MapSector *sect, MapBlock *block) :
 346                 sect(sect),
 347                 block(block)
 348         {}
 349
 350         bool operator<(const TimeOrderedMapBlock &b) const
 351         {
 352                 return block->getUsageTimer() < b.block->getUsageTimer();
 353         };
 354 };
 355
 356 /*
 357         Updates usage timers
 358 */
 359 void Map::timerUpdate(float dtime, float unload_timeout, u32 max_loaded_blocks,
 360                 std::vector<v3s16> *unloaded_blocks)
 361 {
 362         bool save_before_unloading = (mapType() == MAPTYPE_SERVER);
 363
 364         // Profile modified reasons
 365         Profiler modprofiler;
 366
 367         std::vector<v2s16> sector_deletion_queue;
 368         u32 deleted_blocks_count = 0;
 369         u32 saved_blocks_count = 0;
 370         u32 block_count_all = 0;
 371
 372         beginSave();
 373
 374         // If there is no practical limit, we spare creation of mapblock_queue
 375         if (max_loaded_blocks == U32_MAX) {
 376                 for (auto &sector_it : m_sectors) {
 377                         MapSector *sector = sector_it.second;
 378
 379                         bool all_blocks_deleted = true;
 380
 381                         MapBlockVect blocks;
 382                         sector->getBlocks(blocks);
 383
 384                         for (MapBlock *block : blocks) {
 385                                 block->incrementUsageTimer(dtime);
 386
 387                                 if (block->refGet() == 0
 388                                                 && block->getUsageTimer() > unload_timeout) {
 389                                         v3s16 p = block->getPos();
 390
 391                                         // Save if modified
 392                                         if (block->getModified() != MOD_STATE_CLEAN
 393                                                         && save_before_unloading) {
 394                                                 modprofiler.add(block->getModifiedReasonString(), 1);
 395                                                 if (!saveBlock(block))
 396                                                         continue;
 397                                                 saved_blocks_count++;
 398                                         }
 399
 400                                         // Delete from memory
 401                                         sector->deleteBlock(block);
 402
 403                                         if (unloaded_blocks)
 404                                                 unloaded_blocks->push_back(p);
 405
 406                                         deleted_blocks_count++;
 407                                 } else {
 408                                         all_blocks_deleted = false;
 409                                         block_count_all++;
 410                                 }
 411                         }
 412
 413                         if (all_blocks_deleted) {
 414                                 sector_deletion_queue.push_back(sector_it.first);
 415                         }
 416                 }
 417         } else {
 418                 std::priority_queue<TimeOrderedMapBlock> mapblock_queue;
 419                 for (auto &sector_it : m_sectors) {
 420                         MapSector *sector = sector_it.second;
 421
 422                         MapBlockVect blocks;
 423                         sector->getBlocks(blocks);
 424
 425                         for (MapBlock *block : blocks) {
 426                                 block->incrementUsageTimer(dtime);
 427                                 mapblock_queue.push(TimeOrderedMapBlock(sector, block));
 428                         }
 429                 }
 430                 block_count_all = mapblock_queue.size();
 431                 // Delete old blocks, and blocks over the limit from the memory
 432                 while (!mapblock_queue.empty() && (mapblock_queue.size() > max_loaded_blocks
 433                                 || mapblock_queue.top().block->getUsageTimer() > unload_timeout)) {
 434                         TimeOrderedMapBlock b = mapblock_queue.top();
 435                         mapblock_queue.pop();
 436
 437                         MapBlock *block = b.block;
 438
 439                         if (block->refGet() != 0)
 440                                 continue;
 441
 442                         v3s16 p = block->getPos();
 443
 444                         // Save if modified
 445                         if (block->getModified() != MOD_STATE_CLEAN && save_before_unloading) {
 446                                 modprofiler.add(block->getModifiedReasonString(), 1);
 447                                 if (!saveBlock(block))
 448                                         continue;
 449                                 saved_blocks_count++;
 450                         }
 451
 452                         // Delete from memory
 453                         b.sect->deleteBlock(block);
 454
 455                         if (unloaded_blocks)
 456                                 unloaded_blocks->push_back(p);
 457
 458                         deleted_blocks_count++;
 459                         block_count_all--;
 460                 }
 461                 // Delete empty sectors
 462                 for (auto &sector_it : m_sectors) {
 463                         if (sector_it.second->empty()) {
 464                                 sector_deletion_queue.push_back(sector_it.first);
 465                         }
 466                 }
 467         }
 468         endSave();
 469
 470         // Finally delete the empty sectors
 471         deleteSectors(sector_deletion_queue);
 472
 473         if(deleted_blocks_count != 0)
 474         {
 475                 PrintInfo(infostream); // ServerMap/ClientMap:
 476                 infostream<<"Unloaded "<<deleted_blocks_count
 477                                 <<" blocks from memory";
 478                 if(save_before_unloading)
 479                         infostream<<", of which "<<saved_blocks_count<<" were written";
 480                 infostream<<", "<<block_count_all<<" blocks in memory";
 481                 infostream<<"."<<std::endl;
 482                 if(saved_blocks_count != 0){
 483                         PrintInfo(infostream); // ServerMap/ClientMap:
 484                         infostream<<"Blocks modified by: "<<std::endl;
 485                         modprofiler.print(infostream);
 486                 }
 487         }
 488 }
 489
 490 void Map::unloadUnreferencedBlocks(std::vector<v3s16> *unloaded_blocks)
 491 {
 492         timerUpdate(0.0, -1.0, 0, unloaded_blocks);
 493 }
 494
 495 void Map::deleteSectors(std::vector<v2s16> &sectorList)
 496 {
 497         for (v2s16 j : sectorList) {
 498                 MapSector *sector = m_sectors[j];
 499                 // If sector is in sector cache, remove it from there
 500                 if(m_sector_cache == sector)
 501                         m_sector_cache = NULL;
 502                 // Remove from map and delete
 503                 m_sectors.erase(j);
 504                 delete sector;
 505         }
 506 }
 507
 508 void Map::PrintInfo(std::ostream &out)
 509 {
 510         out<<"Map: ";
 511 }
 512
 513 #define WATER_DROP_BOOST 4
 514
 515 enum NeighborType : u8 {
 516         NEIGHBOR_UPPER,
 517         NEIGHBOR_SAME_LEVEL,
 518         NEIGHBOR_LOWER
 519 };
 520
 521 struct NodeNeighbor {
 522         MapNode n;
 523         NeighborType t;
 524         v3s16 p;
 525
 526         NodeNeighbor()
 527                 : n(CONTENT_AIR), t(NEIGHBOR_SAME_LEVEL)
 528         { }
 529
 530         NodeNeighbor(const MapNode &node, NeighborType n_type, const v3s16 &pos)
 531                 : n(node),
 532                   t(n_type),
 533                   p(pos)
 534         { }
 535 };
 536
 537 void Map::transforming_liquid_add(v3s16 p) {
 538         m_transforming_liquid.push_back(p);
 539 }
 540
 541 void Map::transformLiquids(std::map<v3s16, MapBlock*> &modified_blocks,
 542                 ServerEnvironment *env)
 543 {
 544         u32 loopcount = 0;
 545         u32 initial_size = m_transforming_liquid.size();
 546
 547         /*if(initial_size != 0)
 548                 infostream<<"transformLiquids(): initial_size="<<initial_size<<std::endl;*/
 549
 550         // list of nodes that due to viscosity have not reached their max level height
 551         std::deque<v3s16> must_reflow;
 552
 553         std::vector<std::pair<v3s16, MapNode> > changed_nodes;
 554
 555         u32 liquid_loop_max = g_settings->getS32("liquid_loop_max");
 556         u32 loop_max = liquid_loop_max;
 557
 558 #if 0
 559
 560         /* If liquid_loop_max is not keeping up with the queue size increase
 561          * loop_max up to a maximum of liquid_loop_max * dedicated_server_step.
 562          */
 563         if (m_transforming_liquid.size() > loop_max * 2) {
 564                 // "Burst" mode
 565                 float server_step = g_settings->getFloat("dedicated_server_step");
 566                 if (m_transforming_liquid_loop_count_multiplier - 1.0 < server_step)
 567                         m_transforming_liquid_loop_count_multiplier *= 1.0 + server_step / 10;
 568         } else {
 569                 m_transforming_liquid_loop_count_multiplier = 1.0;
 570         }
 571
 572         loop_max *= m_transforming_liquid_loop_count_multiplier;
 573 #endif
 574
 575         while (m_transforming_liquid.size() != 0)
 576         {
 577                 // This should be done here so that it is done when continue is used
 578                 if (loopcount >= initial_size || loopcount >= loop_max)
 579                         break;
 580                 loopcount++;
 581
 582                 /*
 583                         Get a queued transforming liquid node
 584                 */
 585                 v3s16 p0 = m_transforming_liquid.front();
 586                 m_transforming_liquid.pop_front();
 587
 588                 MapNode n0 = getNodeNoEx(p0);
 589
 590                 /*
 591                         Collect information about current node
 592                  */
 593                 s8 liquid_level = -1;
 594                 // The liquid node which will be placed there if
 595                 // the liquid flows into this node.
 596                 content_t liquid_kind = CONTENT_IGNORE;
 597                 // The node which will be placed there if liquid
 598                 // can't flow into this node.
 599                 content_t floodable_node = CONTENT_AIR;
 600                 const ContentFeatures &cf = m_nodedef->get(n0);
 601                 LiquidType liquid_type = cf.liquid_type;
 602                 switch (liquid_type) {
 603                         case LIQUID_SOURCE:
 604                                 liquid_level = LIQUID_LEVEL_SOURCE;
 605                                 liquid_kind = m_nodedef->getId(cf.liquid_alternative_flowing);
 606                                 break;
 607                         case LIQUID_FLOWING:
 608                                 liquid_level = (n0.param2 & LIQUID_LEVEL_MASK);
 609                                 liquid_kind = n0.getContent();
 610                                 break;
 611                         case LIQUID_NONE:
 612                                 // if this node is 'floodable', it *could* be transformed
 613                                 // into a liquid, otherwise, continue with the next node.
 614                                 if (!cf.floodable)
 615                                         continue;
 616                                 floodable_node = n0.getContent();
 617                                 liquid_kind = CONTENT_AIR;
 618                                 break;
 619                 }
 620
 621                 /*
 622                         Collect information about the environment
 623                  */
 624                 const v3s16 *dirs = g_6dirs;
 625                 NodeNeighbor sources[6]; // surrounding sources
 626                 int num_sources = 0;
 627                 NodeNeighbor flows[6]; // surrounding flowing liquid nodes
 628                 int num_flows = 0;
 629                 NodeNeighbor airs[6]; // surrounding air
 630                 int num_airs = 0;
 631                 NodeNeighbor neutrals[6]; // nodes that are solid or another kind of liquid
 632                 int num_neutrals = 0;
 633                 bool flowing_down = false;
 634                 bool ignored_sources = false;
 635                 for (u16 i = 0; i < 6; i++) {
 636                         NeighborType nt = NEIGHBOR_SAME_LEVEL;
 637                         switch (i) {
 638                                 case 1:
 639                                         nt = NEIGHBOR_UPPER;
 640                                         break;
 641                                 case 4:
 642                                         nt = NEIGHBOR_LOWER;
 643                                         break;
 644                                 default:
 645                                         break;
 646                         }
 647                         v3s16 npos = p0 + dirs[i];
 648                         NodeNeighbor nb(getNodeNoEx(npos), nt, npos);
 649                         const ContentFeatures &cfnb = m_nodedef->get(nb.n);
 650                         switch (m_nodedef->get(nb.n.getContent()).liquid_type) {
 651                                 case LIQUID_NONE:
 652                                         if (cfnb.floodable) {
 653                                                 airs[num_airs++] = nb;
 654                                                 // if the current node is a water source the neighbor
 655                                                 // should be enqueded for transformation regardless of whether the
 656                                                 // current node changes or not.
 657                                                 if (nb.t != NEIGHBOR_UPPER && liquid_type != LIQUID_NONE)
 658                                                         m_transforming_liquid.push_back(npos);
 659                                                 // if the current node happens to be a flowing node, it will start to flow down here.
 660                                                 if (nb.t == NEIGHBOR_LOWER)
 661                                                         flowing_down = true;
 662                                         } else {
 663                                                 neutrals[num_neutrals++] = nb;
 664                                                 if (nb.n.getContent() == CONTENT_IGNORE) {
 665                                                         // If node below is ignore prevent water from
 666                                                         // spreading outwards and otherwise prevent from
 667                                                         // flowing away as ignore node might be the source
 668                                                         if (nb.t == NEIGHBOR_LOWER)
 669                                                                 flowing_down = true;
 670                                                         else
 671                                                                 ignored_sources = true;
 672                                                 }
 673                                         }
 674                                         break;
 675                                 case LIQUID_SOURCE:
 676                                         // if this node is not (yet) of a liquid type, choose the first liquid type we encounter
 677                                         if (liquid_kind == CONTENT_AIR)
 678                                                 liquid_kind = m_nodedef->getId(cfnb.liquid_alternative_flowing);
 679                                         if (m_nodedef->getId(cfnb.liquid_alternative_flowing) != liquid_kind) {
 680                                                 neutrals[num_neutrals++] = nb;
 681                                         } else {
 682                                                 // Do not count bottom source, it will screw things up
 683                                                 if(dirs[i].Y != -1)
 684                                                         sources[num_sources++] = nb;
 685                                         }
 686                                         break;
 687                                 case LIQUID_FLOWING:
 688                                         // if this node is not (yet) of a liquid type, choose the first liquid type we encounter
 689                                         if (liquid_kind == CONTENT_AIR)
 690                                                 liquid_kind = m_nodedef->getId(cfnb.liquid_alternative_flowing);
 691                                         if (m_nodedef->getId(cfnb.liquid_alternative_flowing) != liquid_kind) {
 692                                                 neutrals[num_neutrals++] = nb;
 693                                         } else {
 694                                                 flows[num_flows++] = nb;
 695                                                 if (nb.t == NEIGHBOR_LOWER)
 696                                                         flowing_down = true;
 697                                         }
 698                                         break;
 699                         }
 700                 }
 701
 702                 /*
 703                         decide on the type (and possibly level) of the current node
 704                  */
 705                 content_t new_node_content;
 706                 s8 new_node_level = -1;
 707                 s8 max_node_level = -1;
 708
 709                 u8 range = m_nodedef->get(liquid_kind).liquid_range;
 710                 if (range > LIQUID_LEVEL_MAX + 1)
 711                         range = LIQUID_LEVEL_MAX + 1;
 712
 713                 if ((num_sources >= 2 && m_nodedef->get(liquid_kind).liquid_renewable) || liquid_type == LIQUID_SOURCE) {
 714                         // liquid_kind will be set to either the flowing alternative of the node (if it's a liquid)
 715                         // or the flowing alternative of the first of the surrounding sources (if it's air), so
 716                         // it's perfectly safe to use liquid_kind here to determine the new node content.
 717                         new_node_content = m_nodedef->getId(m_nodedef->get(liquid_kind).liquid_alternative_source);
 718                 } else if (num_sources >= 1 && sources[0].t != NEIGHBOR_LOWER) {
 719                         // liquid_kind is set properly, see above
 720                         max_node_level = new_node_level = LIQUID_LEVEL_MAX;
 721                         if (new_node_level >= (LIQUID_LEVEL_MAX + 1 - range))
 722                                 new_node_content = liquid_kind;
 723                         else
 724                                 new_node_content = floodable_node;
 725                 } else if (ignored_sources && liquid_level >= 0) {
 726                         // Maybe there are neighbouring sources that aren't loaded yet
 727                         // so prevent flowing away.
 728                         new_node_level = liquid_level;
 729                         new_node_content = liquid_kind;
 730                 } else {
 731                         // no surrounding sources, so get the maximum level that can flow into this node
 732                         for (u16 i = 0; i < num_flows; i++) {
 733                                 u8 nb_liquid_level = (flows[i].n.param2 & LIQUID_LEVEL_MASK);
 734                                 switch (flows[i].t) {
 735                                         case NEIGHBOR_UPPER:
 736                                                 if (nb_liquid_level + WATER_DROP_BOOST > max_node_level) {
 737                                                         max_node_level = LIQUID_LEVEL_MAX;
 738                                                         if (nb_liquid_level + WATER_DROP_BOOST < LIQUID_LEVEL_MAX)
 739                                                                 max_node_level = nb_liquid_level + WATER_DROP_BOOST;
 740                                                 } else if (nb_liquid_level > max_node_level) {
 741                                                         max_node_level = nb_liquid_level;
 742                                                 }
 743                                                 break;
 744                                         case NEIGHBOR_LOWER:
 745                                                 break;
 746                                         case NEIGHBOR_SAME_LEVEL:
 747                                                 if ((flows[i].n.param2 & LIQUID_FLOW_DOWN_MASK) != LIQUID_FLOW_DOWN_MASK &&
 748                                                                 nb_liquid_level > 0 && nb_liquid_level - 1 > max_node_level)
 749                                                         max_node_level = nb_liquid_level - 1;
 750                                                 break;
 751                                 }
 752                         }
 753
 754                         u8 viscosity = m_nodedef->get(liquid_kind).liquid_viscosity;
 755                         if (viscosity > 1 && max_node_level != liquid_level) {
 756                                 // amount to gain, limited by viscosity
 757                                 // must be at least 1 in absolute value
 758                                 s8 level_inc = max_node_level - liquid_level;
 759                                 if (level_inc < -viscosity || level_inc > viscosity)
 760                                         new_node_level = liquid_level + level_inc/viscosity;
 761                                 else if (level_inc < 0)
 762                                         new_node_level = liquid_level - 1;
 763                                 else if (level_inc > 0)
 764                                         new_node_level = liquid_level + 1;
 765                                 if (new_node_level != max_node_level)
 766                                         must_reflow.push_back(p0);
 767                         } else {
 768                                 new_node_level = max_node_level;
 769                         }
 770
 771                         if (max_node_level >= (LIQUID_LEVEL_MAX + 1 - range))
 772                                 new_node_content = liquid_kind;
 773                         else
 774                                 new_node_content = floodable_node;
 775
 776                 }
 777
 778                 /*
 779                         check if anything has changed. if not, just continue with the next node.
 780                  */
 781                 if (new_node_content == n0.getContent() &&
 782                                 (m_nodedef->get(n0.getContent()).liquid_type != LIQUID_FLOWING ||
 783                                 ((n0.param2 & LIQUID_LEVEL_MASK) == (u8)new_node_level &&
 784                                 ((n0.param2 & LIQUID_FLOW_DOWN_MASK) == LIQUID_FLOW_DOWN_MASK)
 785                                 == flowing_down)))
 786                         continue;
 787
 788
 789                 /*
 790                         update the current node
 791                  */
 792                 MapNode n00 = n0;
 793                 //bool flow_down_enabled = (flowing_down && ((n0.param2 & LIQUID_FLOW_DOWN_MASK) != LIQUID_FLOW_DOWN_MASK));
 794                 if (m_nodedef->get(new_node_content).liquid_type == LIQUID_FLOWING) {
 795                         // set level to last 3 bits, flowing down bit to 4th bit
 796                         n0.param2 = (flowing_down ? LIQUID_FLOW_DOWN_MASK : 0x00) | (new_node_level & LIQUID_LEVEL_MASK);
 797                 } else {
 798                         // set the liquid level and flow bit to 0
 799                         n0.param2 = ~(LIQUID_LEVEL_MASK | LIQUID_FLOW_DOWN_MASK);
 800                 }
 801
 802                 // change the node.
 803                 n0.setContent(new_node_content);
 804
 805                 // on_flood() the node
 806                 if (floodable_node != CONTENT_AIR) {
 807                         if (env->getScriptIface()->node_on_flood(p0, n00, n0))
 808                                 continue;
 809                 }
 810
 811                 // Ignore light (because calling voxalgo::update_lighting_nodes)
 812                 n0.setLight(LIGHTBANK_DAY, 0, m_nodedef);
 813                 n0.setLight(LIGHTBANK_NIGHT, 0, m_nodedef);
 814
 815                 // Find out whether there is a suspect for this action
 816                 std::string suspect;
 817                 if (m_gamedef->rollback())
 818                         suspect = m_gamedef->rollback()->getSuspect(p0, 83, 1);
 819
 820                 if (m_gamedef->rollback() && !suspect.empty()) {
 821                         // Blame suspect
 822                         RollbackScopeActor rollback_scope(m_gamedef->rollback(), suspect, true);
 823                         // Get old node for rollback
 824                         RollbackNode rollback_oldnode(this, p0, m_gamedef);
 825                         // Set node
 826                         setNode(p0, n0);
 827                         // Report
 828                         RollbackNode rollback_newnode(this, p0, m_gamedef);
 829                         RollbackAction action;
 830                         action.setSetNode(p0, rollback_oldnode, rollback_newnode);
 831                         m_gamedef->rollback()->reportAction(action);
 832                 } else {
 833                         // Set node
 834                         setNode(p0, n0);
 835                 }
 836
 837                 v3s16 blockpos = getNodeBlockPos(p0);
 838                 MapBlock *block = getBlockNoCreateNoEx(blockpos);
 839                 if (block != NULL) {
 840                         modified_blocks[blockpos] =  block;
 841                         changed_nodes.emplace_back(p0, n00);
 842                 }
 843
 844                 /*
 845                         enqueue neighbors for update if neccessary
 846                  */
 847                 switch (m_nodedef->get(n0.getContent()).liquid_type) {
 848                         case LIQUID_SOURCE:
 849                         case LIQUID_FLOWING:
 850                                 // make sure source flows into all neighboring nodes
 851                                 for (u16 i = 0; i < num_flows; i++)
 852                                         if (flows[i].t != NEIGHBOR_UPPER)
 853                                                 m_transforming_liquid.push_back(flows[i].p);
 854                                 for (u16 i = 0; i < num_airs; i++)
 855                                         if (airs[i].t != NEIGHBOR_UPPER)
 856                                                 m_transforming_liquid.push_back(airs[i].p);
 857                                 break;
 858                         case LIQUID_NONE:
 859                                 // this flow has turned to air; neighboring flows might need to do the same
 860                                 for (u16 i = 0; i < num_flows; i++)
 861                                         m_transforming_liquid.push_back(flows[i].p);
 862                                 break;
 863                 }
 864         }
 865         //infostream<<"Map::transformLiquids(): loopcount="<<loopcount<<std::endl;
 866
 867         for (auto &iter : must_reflow)
 868                 m_transforming_liquid.push_back(iter);
 869
 870         voxalgo::update_lighting_nodes(this, changed_nodes, modified_blocks);
 871
 872
 873         /* ----------------------------------------------------------------------
 874          * Manage the queue so that it does not grow indefinately
 875          */
 876         u16 time_until_purge = g_settings->getU16("liquid_queue_purge_time");
 877
 878         if (time_until_purge == 0)
 879                 return; // Feature disabled
 880
 881         time_until_purge *= 1000;       // seconds -> milliseconds
 882
 883         u64 curr_time = porting::getTimeMs();
 884         u32 prev_unprocessed = m_unprocessed_count;
 885         m_unprocessed_count = m_transforming_liquid.size();
 886
 887         // if unprocessed block count is decreasing or stable
 888         if (m_unprocessed_count <= prev_unprocessed) {
 889                 m_queue_size_timer_started = false;
 890         } else {
 891                 if (!m_queue_size_timer_started)
 892                         m_inc_trending_up_start_time = curr_time;
 893                 m_queue_size_timer_started = true;
 894         }
 895
 896         // Account for curr_time overflowing
 897         if (m_queue_size_timer_started && m_inc_trending_up_start_time > curr_time)
 898                 m_queue_size_timer_started = false;
 899
 900         /* If the queue has been growing for more than liquid_queue_purge_time seconds
 901          * and the number of unprocessed blocks is still > liquid_loop_max then we
 902          * cannot keep up; dump the oldest blocks from the queue so that the queue
 903          * has liquid_loop_max items in it
 904          */
 905         if (m_queue_size_timer_started
 906                         && curr_time - m_inc_trending_up_start_time > time_until_purge
 907                         && m_unprocessed_count > liquid_loop_max) {
 908
 909                 size_t dump_qty = m_unprocessed_count - liquid_loop_max;
 910
 911                 infostream << "transformLiquids(): DUMPING " << dump_qty
 912                            << " blocks from the queue" << std::endl;
 913
 914                 while (dump_qty--)
 915                         m_transforming_liquid.pop_front();
 916
 917                 m_queue_size_timer_started = false; // optimistically assume we can keep up now
 918                 m_unprocessed_count = m_transforming_liquid.size();
 919         }
 920 }
 921
 922 std::vector<v3s16> Map::findNodesWithMetadata(v3s16 p1, v3s16 p2)
 923 {
 924         std::vector<v3s16> positions_with_meta;
 925
 926         sortBoxVerticies(p1, p2);
 927         v3s16 bpmin = getNodeBlockPos(p1);
 928         v3s16 bpmax = getNodeBlockPos(p2);
 929
 930         VoxelArea area(p1, p2);
 931
 932         for (s16 z = bpmin.Z; z <= bpmax.Z; z++)
 933         for (s16 y = bpmin.Y; y <= bpmax.Y; y++)
 934         for (s16 x = bpmin.X; x <= bpmax.X; x++) {
 935                 v3s16 blockpos(x, y, z);
 936
 937                 MapBlock *block = getBlockNoCreateNoEx(blockpos);
 938                 if (!block) {
 939                         verbosestream << "Map::getNodeMetadata(): Need to emerge "
 940                                 << PP(blockpos) << std::endl;
 941                         block = emergeBlock(blockpos, false);
 942                 }
 943                 if (!block) {
 944                         infostream << "WARNING: Map::getNodeMetadata(): Block not found"
 945                                 << std::endl;
 946                         continue;
 947                 }
 948
 949                 v3s16 p_base = blockpos * MAP_BLOCKSIZE;
 950                 std::vector<v3s16> keys = block->m_node_metadata.getAllKeys();
 951                 for (size_t i = 0; i != keys.size(); i++) {
 952                         v3s16 p(keys[i] + p_base);
 953                         if (!area.contains(p))
 954                                 continue;
 955
 956                         positions_with_meta.push_back(p);
 957                 }
 958         }
 959
 960         return positions_with_meta;
 961 }
 962
 963 NodeMetadata *Map::getNodeMetadata(v3s16 p)
 964 {
 965         v3s16 blockpos = getNodeBlockPos(p);
 966         v3s16 p_rel = p - blockpos*MAP_BLOCKSIZE;
 967         MapBlock *block = getBlockNoCreateNoEx(blockpos);
 968         if(!block){
 969                 infostream<<"Map::getNodeMetadata(): Need to emerge "
 970                                 <<PP(blockpos)<<std::endl;
 971                 block = emergeBlock(blockpos, false);
 972         }
 973         if(!block){
 974                 warningstream<<"Map::getNodeMetadata(): Block not found"
 975                                 <<std::endl;
 976                 return NULL;
 977         }
 978         NodeMetadata *meta = block->m_node_metadata.get(p_rel);
 979         return meta;
 980 }
 981
 982 bool Map::setNodeMetadata(v3s16 p, NodeMetadata *meta)
 983 {
 984         v3s16 blockpos = getNodeBlockPos(p);
 985         v3s16 p_rel = p - blockpos*MAP_BLOCKSIZE;
 986         MapBlock *block = getBlockNoCreateNoEx(blockpos);
 987         if(!block){
 988                 infostream<<"Map::setNodeMetadata(): Need to emerge "
 989                                 <<PP(blockpos)<<std::endl;
 990                 block = emergeBlock(blockpos, false);
 991         }
 992         if(!block){
 993                 warningstream<<"Map::setNodeMetadata(): Block not found"
 994                                 <<std::endl;
 995                 return false;
 996         }
 997         block->m_node_metadata.set(p_rel, meta);
 998         return true;
 999 }
1000
1001 void Map::removeNodeMetadata(v3s16 p)
1002 {
1003         v3s16 blockpos = getNodeBlockPos(p);
1004         v3s16 p_rel = p - blockpos*MAP_BLOCKSIZE;
1005         MapBlock *block = getBlockNoCreateNoEx(blockpos);
1006         if(block == NULL)
1007         {
1008                 warningstream<<"Map::removeNodeMetadata(): Block not found"
1009                                 <<std::endl;
1010                 return;
1011         }
1012         block->m_node_metadata.remove(p_rel);
1013 }
1014
1015 NodeTimer Map::getNodeTimer(v3s16 p)
1016 {
1017         v3s16 blockpos = getNodeBlockPos(p);
1018         v3s16 p_rel = p - blockpos*MAP_BLOCKSIZE;
1019         MapBlock *block = getBlockNoCreateNoEx(blockpos);
1020         if(!block){
1021                 infostream<<"Map::getNodeTimer(): Need to emerge "
1022                                 <<PP(blockpos)<<std::endl;
1023                 block = emergeBlock(blockpos, false);
1024         }
1025         if(!block){
1026                 warningstream<<"Map::getNodeTimer(): Block not found"
1027                                 <<std::endl;
1028                 return NodeTimer();
1029         }
1030         NodeTimer t = block->m_node_timers.get(p_rel);
1031         NodeTimer nt(t.timeout, t.elapsed, p);
1032         return nt;
1033 }
1034
1035 void Map::setNodeTimer(const NodeTimer &t)
1036 {
1037         v3s16 p = t.position;
1038         v3s16 blockpos = getNodeBlockPos(p);
1039         v3s16 p_rel = p - blockpos*MAP_BLOCKSIZE;
1040         MapBlock *block = getBlockNoCreateNoEx(blockpos);
1041         if(!block){
1042                 infostream<<"Map::setNodeTimer(): Need to emerge "
1043                                 <<PP(blockpos)<<std::endl;
1044                 block = emergeBlock(blockpos, false);
1045         }
1046         if(!block){
1047                 warningstream<<"Map::setNodeTimer(): Block not found"
1048                                 <<std::endl;
1049                 return;
1050         }
1051         NodeTimer nt(t.timeout, t.elapsed, p_rel);
1052         block->m_node_timers.set(nt);
1053 }
1054
1055 void Map::removeNodeTimer(v3s16 p)
1056 {
1057         v3s16 blockpos = getNodeBlockPos(p);
1058         v3s16 p_rel = p - blockpos*MAP_BLOCKSIZE;
1059         MapBlock *block = getBlockNoCreateNoEx(blockpos);
1060         if(block == NULL)
1061         {
1062                 warningstream<<"Map::removeNodeTimer(): Block not found"
1063                                 <<std::endl;
1064                 return;
1065         }
1066         block->m_node_timers.remove(p_rel);
1067 }
1068
1069 bool Map::isOccluded(v3s16 p0, v3s16 p1, float step, float stepfac,
1070                 float start_off, float end_off, u32 needed_count)
1071 {
1072         float d0 = (float)BS * p0.getDistanceFrom(p1);
1073         v3s16 u0 = p1 - p0;
1074         v3f uf = v3f(u0.X, u0.Y, u0.Z) * BS;
1075         uf.normalize();
1076         v3f p0f = v3f(p0.X, p0.Y, p0.Z) * BS;
1077         u32 count = 0;
1078         for(float s=start_off; s<d0+end_off; s+=step){
1079                 v3f pf = p0f + uf * s;
1080                 v3s16 p = floatToInt(pf, BS);
1081                 MapNode n = getNodeNoEx(p);
1082                 const ContentFeatures &f = m_nodedef->get(n);
1083                 if(f.drawtype == NDT_NORMAL){
1084                         // not transparent, see ContentFeature::updateTextures
1085                         count++;
1086                         if(count >= needed_count)
1087                                 return true;
1088                 }
1089                 step *= stepfac;
1090         }
1091         return false;
1092 }
1093
1094 bool Map::isBlockOccluded(MapBlock *block, v3s16 cam_pos_nodes) {
1095         v3s16 cpn = block->getPos() * MAP_BLOCKSIZE;
1096         cpn += v3s16(MAP_BLOCKSIZE / 2, MAP_BLOCKSIZE / 2, MAP_BLOCKSIZE / 2);
1097         float step = BS * 1;
1098         float stepfac = 1.1;
1099         float startoff = BS * 1;
1100         // The occlusion search of 'isOccluded()' must stop short of the target
1101         // point by distance 'endoff' (end offset) to not enter the target mapblock.
1102         // For the 8 mapblock corners 'endoff' must therefore be the maximum diagonal
1103         // of a mapblock, because we must consider all view angles.
1104         // sqrt(1^2 + 1^2 + 1^2) = 1.732
1105         float endoff = -BS * MAP_BLOCKSIZE * 1.732050807569;
1106         s16 bs2 = MAP_BLOCKSIZE / 2 + 1;
1107         // to reduce the likelihood of falsely occluded blocks
1108         // require at least two solid blocks
1109         // this is a HACK, we should think of a more precise algorithm
1110         u32 needed_count = 2;
1111
1112         return (
1113                 // For the central point of the mapblock 'endoff' can be halved
1114                 isOccluded(cam_pos_nodes, cpn,
1115                         step, stepfac, startoff, endoff / 2.0f, needed_count) &&
1116                 isOccluded(cam_pos_nodes, cpn + v3s16(bs2,bs2,bs2),
1117                         step, stepfac, startoff, endoff, needed_count) &&
1118                 isOccluded(cam_pos_nodes, cpn + v3s16(bs2,bs2,-bs2),
1119                         step, stepfac, startoff, endoff, needed_count) &&
1120                 isOccluded(cam_pos_nodes, cpn + v3s16(bs2,-bs2,bs2),
1121                         step, stepfac, startoff, endoff, needed_count) &&
1122                 isOccluded(cam_pos_nodes, cpn + v3s16(bs2,-bs2,-bs2),
1123                         step, stepfac, startoff, endoff, needed_count) &&
1124                 isOccluded(cam_pos_nodes, cpn + v3s16(-bs2,bs2,bs2),
1125                         step, stepfac, startoff, endoff, needed_count) &&
1126                 isOccluded(cam_pos_nodes, cpn + v3s16(-bs2,bs2,-bs2),
1127                         step, stepfac, startoff, endoff, needed_count) &&
1128                 isOccluded(cam_pos_nodes, cpn + v3s16(-bs2,-bs2,bs2),
1129                         step, stepfac, startoff, endoff, needed_count) &&
1130                 isOccluded(cam_pos_nodes, cpn + v3s16(-bs2,-bs2,-bs2),
1131                         step, stepfac, startoff, endoff, needed_count));
1132 }
1133
1134 /*
1135         ServerMap
1136 */
1137 ServerMap::ServerMap(const std::string &savedir, IGameDef *gamedef,
1138                 EmergeManager *emerge):
1139         Map(dout_server, gamedef),
1140         settings_mgr(g_settings, savedir + DIR_DELIM + "map_meta.txt"),
1141         m_emerge(emerge)
1142 {
1143         verbosestream<<FUNCTION_NAME<<std::endl;
1144
1145         // Tell the EmergeManager about our MapSettingsManager
1146         emerge->map_settings_mgr = &settings_mgr;
1147
1148         /*
1149                 Try to load map; if not found, create a new one.
1150         */
1151
1152         // Determine which database backend to use
1153         std::string conf_path = savedir + DIR_DELIM + "world.mt";
1154         Settings conf;
1155         bool succeeded = conf.readConfigFile(conf_path.c_str());
1156         if (!succeeded || !conf.exists("backend")) {
1157                 // fall back to sqlite3
1158                 conf.set("backend", "sqlite3");
1159         }
1160         std::string backend = conf.get("backend");
1161         dbase = createDatabase(backend, savedir, conf);
1162
1163         if (!conf.updateConfigFile(conf_path.c_str()))
1164                 errorstream << "ServerMap::ServerMap(): Failed to update world.mt!" << std::endl;
1165
1166         m_savedir = savedir;
1167         m_map_saving_enabled = false;
1168
1169         try {
1170                 // If directory exists, check contents and load if possible
1171                 if (fs::PathExists(m_savedir)) {
1172                         // If directory is empty, it is safe to save into it.
1173                         if (fs::GetDirListing(m_savedir).empty()) {
1174                                 infostream<<"ServerMap: Empty save directory is valid."
1175                                                 <<std::endl;
1176                                 m_map_saving_enabled = true;
1177                         }
1178                         else
1179                         {
1180
1181                                 if (settings_mgr.loadMapMeta()) {
1182                                         infostream << "ServerMap: Metadata loaded from "
1183                                                 << savedir << std::endl;
1184                                 } else {
1185                                         infostream << "ServerMap: Metadata could not be loaded "
1186                                                 "from " << savedir << ", assuming valid save "
1187                                                 "directory." << std::endl;
1188                                 }
1189
1190                                 m_map_saving_enabled = true;
1191                                 // Map loaded, not creating new one
1192                                 return;
1193                         }
1194                 }
1195                 // If directory doesn't exist, it is safe to save to it
1196                 else{
1197                         m_map_saving_enabled = true;
1198                 }
1199         }
1200         catch(std::exception &e)
1201         {
1202                 warningstream<<"ServerMap: Failed to load map from "<<savedir
1203                                 <<", exception: "<<e.what()<<std::endl;
1204                 infostream<<"Please remove the map or fix it."<<std::endl;
1205                 warningstream<<"Map saving will be disabled."<<std::endl;
1206         }
1207 }
1208
1209 ServerMap::~ServerMap()
1210 {
1211         verbosestream<<FUNCTION_NAME<<std::endl;
1212
1213         try
1214         {
1215                 if (m_map_saving_enabled) {
1216                         // Save only changed parts
1217                         save(MOD_STATE_WRITE_AT_UNLOAD);
1218                         infostream << "ServerMap: Saved map to " << m_savedir << std::endl;
1219                 } else {
1220                         infostream << "ServerMap: Map not saved" << std::endl;
1221                 }
1222         }
1223         catch(std::exception &e)
1224         {
1225                 infostream<<"ServerMap: Failed to save map to "<<m_savedir
1226                                 <<", exception: "<<e.what()<<std::endl;
1227         }
1228
1229         /*
1230                 Close database if it was opened
1231         */
1232         delete dbase;
1233
1234 #if 0
1235         /*
1236                 Free all MapChunks
1237         */
1238         core::map<v2s16, MapChunk*>::Iterator i = m_chunks.getIterator();
1239         for(; i.atEnd() == false; i++)
1240         {
1241                 MapChunk *chunk = i.getNode()->getValue();
1242                 delete chunk;
1243         }
1244 #endif
1245 }
1246
1247 MapgenParams *ServerMap::getMapgenParams()
1248 {
1249         // getMapgenParams() should only ever be called after Server is initialized
1250         assert(settings_mgr.mapgen_params != NULL);
1251         return settings_mgr.mapgen_params;
1252 }
1253
1254 u64 ServerMap::getSeed()
1255 {
1256         return getMapgenParams()->seed;
1257 }
1258
1259 s16 ServerMap::getWaterLevel()
1260 {
1261         return getMapgenParams()->water_level;
1262 }
1263
1264 bool ServerMap::blockpos_over_mapgen_limit(v3s16 p)
1265 {
1266         const s16 mapgen_limit_bp = rangelim(
1267                 getMapgenParams()->mapgen_limit, 0, MAX_MAP_GENERATION_LIMIT) /
1268                 MAP_BLOCKSIZE;
1269         return p.X < -mapgen_limit_bp ||
1270                 p.X >  mapgen_limit_bp ||
1271                 p.Y < -mapgen_limit_bp ||
1272                 p.Y >  mapgen_limit_bp ||
1273                 p.Z < -mapgen_limit_bp ||
1274                 p.Z >  mapgen_limit_bp;
1275 }
1276
1277 bool ServerMap::initBlockMake(v3s16 blockpos, BlockMakeData *data)
1278 {
1279         s16 csize = getMapgenParams()->chunksize;
1280         v3s16 bpmin = EmergeManager::getContainingChunk(blockpos, csize);
1281         v3s16 bpmax = bpmin + v3s16(1, 1, 1) * (csize - 1);
1282
1283         bool enable_mapgen_debug_info = m_emerge->enable_mapgen_debug_info;
1284         EMERGE_DBG_OUT("initBlockMake(): " PP(bpmin) " - " PP(bpmax));
1285
1286         v3s16 extra_borders(1, 1, 1);
1287         v3s16 full_bpmin = bpmin - extra_borders;
1288         v3s16 full_bpmax = bpmax + extra_borders;
1289
1290         // Do nothing if not inside mapgen limits (+-1 because of neighbors)
1291         if (blockpos_over_mapgen_limit(full_bpmin) ||
1292                         blockpos_over_mapgen_limit(full_bpmax))
1293                 return false;
1294
1295         data->seed = getSeed();
1296         data->blockpos_min = bpmin;
1297         data->blockpos_max = bpmax;
1298         data->blockpos_requested = blockpos;
1299         data->nodedef = m_nodedef;
1300
1301         /*
1302                 Create the whole area of this and the neighboring blocks
1303         */
1304         for (s16 x = full_bpmin.X; x <= full_bpmax.X; x++)
1305         for (s16 z = full_bpmin.Z; z <= full_bpmax.Z; z++) {
1306                 v2s16 sectorpos(x, z);
1307                 // Sector metadata is loaded from disk if not already loaded.
1308                 MapSector *sector = createSector(sectorpos);
1309                 FATAL_ERROR_IF(sector == NULL, "createSector() failed");
1310
1311                 for (s16 y = full_bpmin.Y; y <= full_bpmax.Y; y++) {
1312                         v3s16 p(x, y, z);
1313
1314                         MapBlock *block = emergeBlock(p, false);
1315                         if (block == NULL) {
1316                                 block = createBlock(p);
1317
1318                                 // Block gets sunlight if this is true.
1319                                 // Refer to the map generator heuristics.
1320                                 bool ug = m_emerge->isBlockUnderground(p);
1321                                 block->setIsUnderground(ug);
1322                         }
1323                 }
1324         }
1325
1326         /*
1327                 Now we have a big empty area.
1328
1329                 Make a ManualMapVoxelManipulator that contains this and the
1330                 neighboring blocks
1331         */
1332
1333         data->vmanip = new MMVManip(this);
1334         data->vmanip->initialEmerge(full_bpmin, full_bpmax);
1335
1336         // Note: we may need this again at some point.
1337 #if 0
1338         // Ensure none of the blocks to be generated were marked as
1339         // containing CONTENT_IGNORE
1340         for (s16 z = blockpos_min.Z; z <= blockpos_max.Z; z++) {
1341                 for (s16 y = blockpos_min.Y; y <= blockpos_max.Y; y++) {
1342                         for (s16 x = blockpos_min.X; x <= blockpos_max.X; x++) {
1343                                 core::map<v3s16, u8>::Node *n;
1344                                 n = data->vmanip->m_loaded_blocks.find(v3s16(x, y, z));
1345                                 if (n == NULL)
1346                                         continue;
1347                                 u8 flags = n->getValue();
1348                                 flags &= ~VMANIP_BLOCK_CONTAINS_CIGNORE;
1349                                 n->setValue(flags);
1350                         }
1351                 }
1352         }
1353 #endif
1354
1355         // Data is ready now.
1356         return true;
1357 }
1358
1359 void ServerMap::finishBlockMake(BlockMakeData *data,
1360         std::map<v3s16, MapBlock*> *changed_blocks)
1361 {
1362         v3s16 bpmin = data->blockpos_min;
1363         v3s16 bpmax = data->blockpos_max;
1364
1365         v3s16 extra_borders(1, 1, 1);
1366
1367         bool enable_mapgen_debug_info = m_emerge->enable_mapgen_debug_info;
1368         EMERGE_DBG_OUT("finishBlockMake(): " PP(bpmin) " - " PP(bpmax));
1369
1370         /*
1371                 Blit generated stuff to map
1372                 NOTE: blitBackAll adds nearly everything to changed_blocks
1373         */
1374         data->vmanip->blitBackAll(changed_blocks);
1375
1376         EMERGE_DBG_OUT("finishBlockMake: changed_blocks.size()="
1377                 << changed_blocks->size());
1378
1379         /*
1380                 Copy transforming liquid information
1381         */
1382         while (data->transforming_liquid.size()) {
1383                 m_transforming_liquid.push_back(data->transforming_liquid.front());
1384                 data->transforming_liquid.pop_front();
1385         }
1386
1387         for (auto &changed_block : *changed_blocks) {
1388                 MapBlock *block = changed_block.second;
1389                 if (!block)
1390                         continue;
1391                 /*
1392                         Update day/night difference cache of the MapBlocks
1393                 */
1394                 block->expireDayNightDiff();
1395                 /*
1396                         Set block as modified
1397                 */
1398                 block->raiseModified(MOD_STATE_WRITE_NEEDED,
1399                         MOD_REASON_EXPIRE_DAYNIGHTDIFF);
1400         }
1401
1402         /*
1403                 Set central blocks as generated
1404         */
1405         for (s16 x = bpmin.X; x <= bpmax.X; x++)
1406         for (s16 z = bpmin.Z; z <= bpmax.Z; z++)
1407         for (s16 y = bpmin.Y; y <= bpmax.Y; y++) {
1408                 MapBlock *block = getBlockNoCreateNoEx(v3s16(x, y, z));
1409                 if (!block)
1410                         continue;
1411
1412                 block->setGenerated(true);
1413         }
1414
1415         /*
1416                 Save changed parts of map
1417                 NOTE: Will be saved later.
1418         */
1419         //save(MOD_STATE_WRITE_AT_UNLOAD);
1420 }
1421
1422 MapSector *ServerMap::createSector(v2s16 p2d)
1423 {
1424         /*
1425                 Check if it exists already in memory
1426         */
1427         MapSector *sector = getSectorNoGenerateNoEx(p2d);
1428         if (sector)
1429                 return sector;
1430
1431         /*
1432                 Do not create over max mapgen limit
1433         */
1434         const s16 max_limit_bp = MAX_MAP_GENERATION_LIMIT / MAP_BLOCKSIZE;
1435         if (p2d.X < -max_limit_bp ||
1436                         p2d.X >  max_limit_bp ||
1437                         p2d.Y < -max_limit_bp ||
1438                         p2d.Y >  max_limit_bp)
1439                 throw InvalidPositionException("createSector(): pos. over max mapgen limit");
1440
1441         /*
1442                 Generate blank sector
1443         */
1444
1445         sector = new MapSector(this, p2d, m_gamedef);
1446
1447         // Sector position on map in nodes
1448         //v2s16 nodepos2d = p2d * MAP_BLOCKSIZE;
1449
1450         /*
1451                 Insert to container
1452         */
1453         m_sectors[p2d] = sector;
1454
1455         return sector;
1456 }
1457
1458 #if 0
1459 /*
1460         This is a quick-hand function for calling makeBlock().
1461 */
1462 MapBlock * ServerMap::generateBlock(
1463                 v3s16 p,
1464                 std::map<v3s16, MapBlock*> &modified_blocks
1465 )
1466 {
1467         bool enable_mapgen_debug_info = g_settings->getBool("enable_mapgen_debug_info");
1468
1469         TimeTaker timer("generateBlock");
1470
1471         //MapBlock *block = original_dummy;
1472
1473         v2s16 p2d(p.X, p.Z);
1474         v2s16 p2d_nodes = p2d * MAP_BLOCKSIZE;
1475
1476         /*
1477                 Do not generate over-limit
1478         */
1479         if(blockpos_over_limit(p))
1480         {
1481                 infostream<<FUNCTION_NAME<<": Block position over limit"<<std::endl;
1482                 throw InvalidPositionException("generateBlock(): pos. over limit");
1483         }
1484
1485         /*
1486                 Create block make data
1487         */
1488         BlockMakeData data;
1489         initBlockMake(&data, p);
1490
1491         /*
1492                 Generate block
1493         */
1494         {
1495                 TimeTaker t("mapgen::make_block()");
1496                 mapgen->makeChunk(&data);
1497                 //mapgen::make_block(&data);
1498
1499                 if(enable_mapgen_debug_info == false)
1500                         t.stop(true); // Hide output
1501         }
1502
1503         /*
1504                 Blit data back on map, update lighting, add mobs and whatever this does
1505         */
1506         finishBlockMake(&data, modified_blocks);
1507
1508         /*
1509                 Get central block
1510         */
1511         MapBlock *block = getBlockNoCreateNoEx(p);
1512
1513 #if 0
1514         /*
1515                 Check result
1516         */
1517         if(block)
1518         {
1519                 bool erroneus_content = false;
1520                 for(s16 z0=0; z0<MAP_BLOCKSIZE; z0++)
1521                 for(s16 y0=0; y0<MAP_BLOCKSIZE; y0++)
1522                 for(s16 x0=0; x0<MAP_BLOCKSIZE; x0++)
1523                 {
1524                         v3s16 p(x0,y0,z0);
1525                         MapNode n = block->getNode(p);
1526                         if(n.getContent() == CONTENT_IGNORE)
1527                         {
1528                                 infostream<<"CONTENT_IGNORE at "
1529                                                 <<"("<<p.X<<","<<p.Y<<","<<p.Z<<")"
1530                                                 <<std::endl;
1531                                 erroneus_content = true;
1532                                 assert(0);
1533                         }
1534                 }
1535                 if(erroneus_content)
1536                 {
1537                         assert(0);
1538                 }
1539         }
1540 #endif
1541
1542 #if 0
1543         /*
1544                 Generate a completely empty block
1545         */
1546         if(block)
1547         {
1548                 for(s16 z0=0; z0<MAP_BLOCKSIZE; z0++)
1549                 for(s16 x0=0; x0<MAP_BLOCKSIZE; x0++)
1550                 {
1551                         for(s16 y0=0; y0<MAP_BLOCKSIZE; y0++)
1552                         {
1553                                 MapNode n;
1554                                 n.setContent(CONTENT_AIR);
1555                                 block->setNode(v3s16(x0,y0,z0), n);
1556                         }
1557                 }
1558         }
1559 #endif
1560
1561         if(enable_mapgen_debug_info == false)
1562                 timer.stop(true); // Hide output
1563
1564         return block;
1565 }
1566 #endif
1567
1568 MapBlock * ServerMap::createBlock(v3s16 p)
1569 {
1570         /*
1571                 Do not create over max mapgen limit
1572         */
1573         if (blockpos_over_max_limit(p))
1574                 throw InvalidPositionException("createBlock(): pos. over max mapgen limit");
1575
1576         v2s16 p2d(p.X, p.Z);
1577         s16 block_y = p.Y;
1578         /*
1579                 This will create or load a sector if not found in memory.
1580                 If block exists on disk, it will be loaded.
1581
1582                 NOTE: On old save formats, this will be slow, as it generates
1583                       lighting on blocks for them.
1584         */
1585         MapSector *sector;
1586         try {
1587                 sector = createSector(p2d);
1588         } catch (InvalidPositionException &e) {
1589                 infostream<<"createBlock: createSector() failed"<<std::endl;
1590                 throw e;
1591         }
1592
1593         /*
1594                 Try to get a block from the sector
1595         */
1596
1597         MapBlock *block = sector->getBlockNoCreateNoEx(block_y);
1598         if (block) {
1599                 if(block->isDummy())
1600                         block->unDummify();
1601                 return block;
1602         }
1603         // Create blank
1604         block = sector->createBlankBlock(block_y);
1605
1606         return block;
1607 }
1608
1609 MapBlock * ServerMap::emergeBlock(v3s16 p, bool create_blank)
1610 {
1611         {
1612                 MapBlock *block = getBlockNoCreateNoEx(p);
1613                 if (block && !block->isDummy())
1614                         return block;
1615         }
1616
1617         {
1618                 MapBlock *block = loadBlock(p);
1619                 if(block)
1620                         return block;
1621         }
1622
1623         if (create_blank) {
1624                 MapSector *sector = createSector(v2s16(p.X, p.Z));
1625                 MapBlock *block = sector->createBlankBlock(p.Y);
1626
1627                 return block;
1628         }
1629
1630         return NULL;
1631 }
1632
1633 MapBlock *ServerMap::getBlockOrEmerge(v3s16 p3d)
1634 {
1635         MapBlock *block = getBlockNoCreateNoEx(p3d);
1636         if (block == NULL)
1637                 m_emerge->enqueueBlockEmerge(PEER_ID_INEXISTENT, p3d, false);
1638
1639         return block;
1640 }
1641
1642 // N.B.  This requires no synchronization, since data will not be modified unless
1643 // the VoxelManipulator being updated belongs to the same thread.
1644 void ServerMap::updateVManip(v3s16 pos)
1645 {
1646         Mapgen *mg = m_emerge->getCurrentMapgen();
1647         if (!mg)
1648                 return;
1649
1650         MMVManip *vm = mg->vm;
1651         if (!vm)
1652                 return;
1653
1654         if (!vm->m_area.contains(pos))
1655                 return;
1656
1657         s32 idx = vm->m_area.index(pos);
1658         vm->m_data[idx] = getNodeNoEx(pos);
1659         vm->m_flags[idx] &= ~VOXELFLAG_NO_DATA;
1660
1661         vm->m_is_dirty = true;
1662 }
1663
1664 s16 ServerMap::findGroundLevel(v2s16 p2d)
1665 {
1666 #if 0
1667         /*
1668                 Uh, just do something random...
1669         */
1670         // Find existing map from top to down
1671         s16 max=63;
1672         s16 min=-64;
1673         v3s16 p(p2d.X, max, p2d.Y);
1674         for(; p.Y>min; p.Y--)
1675         {
1676                 MapNode n = getNodeNoEx(p);
1677                 if(n.getContent() != CONTENT_IGNORE)
1678                         break;
1679         }
1680         if(p.Y == min)
1681                 goto plan_b;
1682         // If this node is not air, go to plan b
1683         if(getNodeNoEx(p).getContent() != CONTENT_AIR)
1684                 goto plan_b;
1685         // Search existing walkable and return it
1686         for(; p.Y>min; p.Y--)
1687         {
1688                 MapNode n = getNodeNoEx(p);
1689                 if(content_walkable(n.d) && n.getContent() != CONTENT_IGNORE)
1690                         return p.Y;
1691         }
1692
1693         // Move to plan b
1694 plan_b:
1695 #endif
1696
1697         /*
1698                 Determine from map generator noise functions
1699         */
1700
1701         s16 level = m_emerge->getGroundLevelAtPoint(p2d);
1702         return level;
1703
1704         //double level = base_rock_level_2d(m_seed, p2d) + AVERAGE_MUD_AMOUNT;
1705         //return (s16)level;
1706 }
1707
1708 bool ServerMap::loadFromFolders() {
1709         if (!dbase->initialized() &&
1710                         !fs::PathExists(m_savedir + DIR_DELIM + "map.sqlite"))
1711                 return true;
1712         return false;
1713 }
1714
1715 void ServerMap::createDirs(std::string path)
1716 {
1717         if (!fs::CreateAllDirs(path)) {
1718                 m_dout<<"ServerMap: Failed to create directory "
1719                                 <<"\""<<path<<"\""<<std::endl;
1720                 throw BaseException("ServerMap failed to create directory");
1721         }
1722 }
1723
1724 std::string ServerMap::getSectorDir(v2s16 pos, int layout)
1725 {
1726         char cc[9];
1727         switch(layout)
1728         {
1729                 case 1:
1730                         snprintf(cc, 9, "%.4x%.4x",
1731                                 (unsigned int) pos.X & 0xffff,
1732                                 (unsigned int) pos.Y & 0xffff);
1733
1734                         return m_savedir + DIR_DELIM + "sectors" + DIR_DELIM + cc;
1735                 case 2:
1736                         snprintf(cc, 9, (std::string("%.3x") + DIR_DELIM + "%.3x").c_str(),
1737                                 (unsigned int) pos.X & 0xfff,
1738                                 (unsigned int) pos.Y & 0xfff);
1739
1740                         return m_savedir + DIR_DELIM + "sectors2" + DIR_DELIM + cc;
1741                 default:
1742                         assert(false);
1743                         return "";
1744         }
1745 }
1746
1747 v2s16 ServerMap::getSectorPos(const std::string &dirname)
1748 {
1749         unsigned int x = 0, y = 0;
1750         int r;
1751         std::string component;
1752         fs::RemoveLastPathComponent(dirname, &component, 1);
1753         if(component.size() == 8)
1754         {
1755                 // Old layout
1756                 r = sscanf(component.c_str(), "%4x%4x", &x, &y);
1757         }
1758         else if(component.size() == 3)
1759         {
1760                 // New layout
1761                 fs::RemoveLastPathComponent(dirname, &component, 2);
1762                 r = sscanf(component.c_str(), (std::string("%3x") + DIR_DELIM + "%3x").c_str(), &x, &y);
1763                 // Sign-extend the 12 bit values up to 16 bits...
1764                 if(x & 0x800) x |= 0xF000;
1765                 if(y & 0x800) y |= 0xF000;
1766         }
1767         else
1768         {
1769                 r = -1;
1770         }
1771
1772         FATAL_ERROR_IF(r != 2, "getSectorPos()");
1773         v2s16 pos((s16)x, (s16)y);
1774         return pos;
1775 }
1776
1777 v3s16 ServerMap::getBlockPos(const std::string &sectordir, const std::string &blockfile)
1778 {
1779         v2s16 p2d = getSectorPos(sectordir);
1780
1781         if(blockfile.size() != 4){
1782                 throw InvalidFilenameException("Invalid block filename");
1783         }
1784         unsigned int y;
1785         int r = sscanf(blockfile.c_str(), "%4x", &y);
1786         if(r != 1)
1787                 throw InvalidFilenameException("Invalid block filename");
1788         return v3s16(p2d.X, y, p2d.Y);
1789 }
1790
1791 std::string ServerMap::getBlockFilename(v3s16 p)
1792 {
1793         char cc[5];
1794         snprintf(cc, 5, "%.4x", (unsigned int)p.Y&0xffff);
1795         return cc;
1796 }
1797
1798 void ServerMap::save(ModifiedState save_level)
1799 {
1800         if (!m_map_saving_enabled) {
1801                 warningstream<<"Not saving map, saving disabled."<<std::endl;
1802                 return;
1803         }
1804
1805         if(save_level == MOD_STATE_CLEAN)
1806                 infostream<<"ServerMap: Saving whole map, this can take time."
1807                                 <<std::endl;
1808
1809         if (m_map_metadata_changed || save_level == MOD_STATE_CLEAN) {
1810                 if (settings_mgr.saveMapMeta())
1811                         m_map_metadata_changed = false;
1812         }
1813
1814         // Profile modified reasons
1815         Profiler modprofiler;
1816
1817         u32 block_count = 0;
1818         u32 block_count_all = 0; // Number of blocks in memory
1819
1820         // Don't do anything with sqlite unless something is really saved
1821         bool save_started = false;
1822
1823         for (auto &sector_it : m_sectors) {
1824                 MapSector *sector = sector_it.second;
1825
1826                 MapBlockVect blocks;
1827                 sector->getBlocks(blocks);
1828
1829                 for (MapBlock *block : blocks) {
1830                         block_count_all++;
1831
1832                         if(block->getModified() >= (u32)save_level) {
1833                                 // Lazy beginSave()
1834                                 if(!save_started) {
1835                                         beginSave();
1836                                         save_started = true;
1837                                 }
1838
1839                                 modprofiler.add(block->getModifiedReasonString(), 1);
1840
1841                                 saveBlock(block);
1842                                 block_count++;
1843                         }
1844                 }
1845         }
1846
1847         if(save_started)
1848                 endSave();
1849
1850         /*
1851                 Only print if something happened or saved whole map
1852         */
1853         if(save_level == MOD_STATE_CLEAN
1854                         || block_count != 0) {
1855                 infostream<<"ServerMap: Written: "
1856                                 <<block_count<<" block files"
1857                                 <<", "<<block_count_all<<" blocks in memory."
1858                                 <<std::endl;
1859                 PrintInfo(infostream); // ServerMap/ClientMap:
1860                 infostream<<"Blocks modified by: "<<std::endl;
1861                 modprofiler.print(infostream);
1862         }
1863 }
1864
1865 void ServerMap::listAllLoadableBlocks(std::vector<v3s16> &dst)
1866 {
1867         if (loadFromFolders()) {
1868                 errorstream << "Map::listAllLoadableBlocks(): Result will be missing "
1869                                 << "all blocks that are stored in flat files." << std::endl;
1870         }
1871         dbase->listAllLoadableBlocks(dst);
1872 }
1873
1874 void ServerMap::listAllLoadedBlocks(std::vector<v3s16> &dst)
1875 {
1876         for (auto &sector_it : m_sectors) {
1877                 MapSector *sector = sector_it.second;
1878
1879                 MapBlockVect blocks;
1880                 sector->getBlocks(blocks);
1881
1882                 for (MapBlock *block : blocks) {
1883                         v3s16 p = block->getPos();
1884                         dst.push_back(p);
1885                 }
1886         }
1887 }
1888
1889 MapDatabase *ServerMap::createDatabase(
1890         const std::string &name,
1891         const std::string &savedir,
1892         Settings &conf)
1893 {
1894         if (name == "sqlite3")
1895                 return new MapDatabaseSQLite3(savedir);
1896         if (name == "dummy")
1897                 return new Database_Dummy();
1898         #if USE_LEVELDB
1899         if (name == "leveldb")
1900                 return new Database_LevelDB(savedir);
1901         #endif
1902         #if USE_REDIS
1903         if (name == "redis")
1904                 return new Database_Redis(conf);
1905         #endif
1906         #if USE_POSTGRESQL
1907         if (name == "postgresql") {
1908                 std::string connect_string;
1909                 conf.getNoEx("pgsql_connection", connect_string);
1910                 return new MapDatabasePostgreSQL(connect_string);
1911         }
1912         #endif
1913
1914         throw BaseException(std::string("Database backend ") + name + " not supported.");
1915 }
1916
1917 void ServerMap::beginSave()
1918 {
1919         dbase->beginSave();
1920 }
1921
1922 void ServerMap::endSave()
1923 {
1924         dbase->endSave();
1925 }
1926
1927 bool ServerMap::saveBlock(MapBlock *block)
1928 {
1929         return saveBlock(block, dbase);
1930 }
1931
1932 bool ServerMap::saveBlock(MapBlock *block, MapDatabase *db)
1933 {
1934         v3s16 p3d = block->getPos();
1935
1936         // Dummy blocks are not written
1937         if (block->isDummy()) {
1938                 warningstream << "saveBlock: Not writing dummy block "
1939                         << PP(p3d) << std::endl;
1940                 return true;
1941         }
1942
1943         // Format used for writing
1944         u8 version = SER_FMT_VER_HIGHEST_WRITE;
1945
1946         /*
1947                 [0] u8 serialization version
1948                 [1] data
1949         */
1950         std::ostringstream o(std::ios_base::binary);
1951         o.write((char*) &version, 1);
1952         block->serialize(o, version, true);
1953
1954         bool ret = db->saveBlock(p3d, o.str());
1955         if (ret) {
1956                 // We just wrote it to the disk so clear modified flag
1957                 block->resetModified();
1958         }
1959         return ret;
1960 }
1961
1962 void ServerMap::loadBlock(const std::string &sectordir, const std::string &blockfile,
1963                 MapSector *sector, bool save_after_load)
1964 {
1965         std::string fullpath = sectordir + DIR_DELIM + blockfile;
1966         try {
1967                 std::ifstream is(fullpath.c_str(), std::ios_base::binary);
1968                 if (!is.good())
1969                         throw FileNotGoodException("Cannot open block file");
1970
1971                 v3s16 p3d = getBlockPos(sectordir, blockfile);
1972                 v2s16 p2d(p3d.X, p3d.Z);
1973
1974                 assert(sector->getPos() == p2d);
1975
1976                 u8 version = SER_FMT_VER_INVALID;
1977                 is.read((char*)&version, 1);
1978
1979                 if(is.fail())
1980                         throw SerializationError("ServerMap::loadBlock(): Failed"
1981                                         " to read MapBlock version");
1982
1983                 /*u32 block_size = MapBlock::serializedLength(version);
1984                 SharedBuffer<u8> data(block_size);
1985                 is.read((char*)*data, block_size);*/
1986
1987                 // This will always return a sector because we're the server
1988                 //MapSector *sector = emergeSector(p2d);
1989
1990                 MapBlock *block = NULL;
1991                 bool created_new = false;
1992                 block = sector->getBlockNoCreateNoEx(p3d.Y);
1993                 if(block == NULL)
1994                 {
1995                         block = sector->createBlankBlockNoInsert(p3d.Y);
1996                         created_new = true;
1997                 }
1998
1999                 // Read basic data
2000                 block->deSerialize(is, version, true);
2001
2002                 // If it's a new block, insert it to the map
2003                 if (created_new) {
2004                         sector->insertBlock(block);
2005                         ReflowScan scanner(this, m_emerge->ndef);
2006                         scanner.scan(block, &m_transforming_liquid);
2007                 }
2008
2009                 /*
2010                         Save blocks loaded in old format in new format
2011                 */
2012
2013                 if(version < SER_FMT_VER_HIGHEST_WRITE || save_after_load)
2014                 {
2015                         saveBlock(block);
2016
2017                         // Should be in database now, so delete the old file
2018                         fs::RecursiveDelete(fullpath);
2019                 }
2020
2021                 // We just loaded it from the disk, so it's up-to-date.
2022                 block->resetModified();
2023
2024         }
2025         catch(SerializationError &e)
2026         {
2027                 warningstream<<"Invalid block data on disk "
2028                                 <<"fullpath="<<fullpath
2029                                 <<" (SerializationError). "
2030                                 <<"what()="<<e.what()
2031                                 <<std::endl;
2032                                 // Ignoring. A new one will be generated.
2033                 abort();
2034
2035                 // TODO: Backup file; name is in fullpath.
2036         }
2037 }
2038
2039 void ServerMap::loadBlock(std::string *blob, v3s16 p3d, MapSector *sector, bool save_after_load)
2040 {
2041         try {
2042                 std::istringstream is(*blob, std::ios_base::binary);
2043
2044                 u8 version = SER_FMT_VER_INVALID;
2045                 is.read((char*)&version, 1);
2046
2047                 if(is.fail())
2048                         throw SerializationError("ServerMap::loadBlock(): Failed"
2049                                         " to read MapBlock version");
2050
2051                 MapBlock *block = NULL;
2052                 bool created_new = false;
2053                 block = sector->getBlockNoCreateNoEx(p3d.Y);
2054                 if(block == NULL)
2055                 {
2056                         block = sector->createBlankBlockNoInsert(p3d.Y);
2057                         created_new = true;
2058                 }
2059
2060                 // Read basic data
2061                 block->deSerialize(is, version, true);
2062
2063                 // If it's a new block, insert it to the map
2064                 if (created_new) {
2065                         sector->insertBlock(block);
2066                         ReflowScan scanner(this, m_emerge->ndef);
2067                         scanner.scan(block, &m_transforming_liquid);
2068                 }
2069
2070                 /*
2071                         Save blocks loaded in old format in new format
2072                 */
2073
2074                 //if(version < SER_FMT_VER_HIGHEST_READ || save_after_load)
2075                 // Only save if asked to; no need to update version
2076                 if(save_after_load)
2077                         saveBlock(block);
2078
2079                 // We just loaded it from, so it's up-to-date.
2080                 block->resetModified();
2081         }
2082         catch(SerializationError &e)
2083         {
2084                 errorstream<<"Invalid block data in database"
2085                                 <<" ("<<p3d.X<<","<<p3d.Y<<","<<p3d.Z<<")"
2086                                 <<" (SerializationError): "<<e.what()<<std::endl;
2087
2088                 // TODO: Block should be marked as invalid in memory so that it is
2089                 // not touched but the game can run
2090
2091                 if(g_settings->getBool("ignore_world_load_errors")){
2092                         errorstream<<"Ignoring block load error. Duck and cover! "
2093                                         <<"(ignore_world_load_errors)"<<std::endl;
2094                 } else {
2095                         throw SerializationError("Invalid block data in database");
2096                 }
2097         }
2098 }
2099
2100 MapBlock* ServerMap::loadBlock(v3s16 blockpos)
2101 {
2102         bool created_new = (getBlockNoCreateNoEx(blockpos) == NULL);
2103
2104         v2s16 p2d(blockpos.X, blockpos.Z);
2105
2106         std::string ret;
2107         dbase->loadBlock(blockpos, &ret);
2108         if (!ret.empty()) {
2109                 loadBlock(&ret, blockpos, createSector(p2d), false);
2110         } else {
2111                 // Not found in database, try the files
2112
2113                 // The directory layout we're going to load from.
2114                 //  1 - original sectors/xxxxzzzz/
2115                 //  2 - new sectors2/xxx/zzz/
2116                 //  If we load from anything but the latest structure, we will
2117                 //  immediately save to the new one, and remove the old.
2118                 std::string sectordir1 = getSectorDir(p2d, 1);
2119                 std::string sectordir;
2120                 if (fs::PathExists(sectordir1)) {
2121                         sectordir = sectordir1;
2122                 } else {
2123                         sectordir = getSectorDir(p2d, 2);
2124                 }
2125
2126                 /*
2127                 Make sure sector is loaded
2128                  */
2129
2130                 MapSector *sector = getSectorNoGenerateNoEx(p2d);
2131
2132                 /*
2133                 Make sure file exists
2134                  */
2135
2136                 std::string blockfilename = getBlockFilename(blockpos);
2137                 if (!fs::PathExists(sectordir + DIR_DELIM + blockfilename))
2138                         return NULL;
2139
2140                 /*
2141                 Load block and save it to the database
2142                  */
2143                 loadBlock(sectordir, blockfilename, sector, true);
2144         }
2145
2146         MapBlock *block = getBlockNoCreateNoEx(blockpos);
2147         if (created_new && (block != NULL)) {
2148                 std::map<v3s16, MapBlock*> modified_blocks;
2149                 // Fix lighting if necessary
2150                 voxalgo::update_block_border_lighting(this, block, modified_blocks);
2151                 if (!modified_blocks.empty()) {
2152                         //Modified lighting, send event
2153                         MapEditEvent event;
2154                         event.type = MEET_OTHER;
2155                         std::map<v3s16, MapBlock *>::iterator it;
2156                         for (it = modified_blocks.begin();
2157                                         it != modified_blocks.end(); ++it)
2158                                 event.modified_blocks.insert(it->first);
2159                         dispatchEvent(&event);
2160                 }
2161         }
2162         return block;
2163 }
2164
2165 bool ServerMap::deleteBlock(v3s16 blockpos)
2166 {
2167         if (!dbase->deleteBlock(blockpos))
2168                 return false;
2169
2170         MapBlock *block = getBlockNoCreateNoEx(blockpos);
2171         if (block) {
2172                 v2s16 p2d(blockpos.X, blockpos.Z);
2173                 MapSector *sector = getSectorNoGenerateNoEx(p2d);
2174                 if (!sector)
2175                         return false;
2176                 sector->deleteBlock(block);
2177         }
2178
2179         return true;
2180 }
2181
2182 void ServerMap::PrintInfo(std::ostream &out)
2183 {
2184         out<<"ServerMap: ";
2185 }
2186
2187 bool ServerMap::repairBlockLight(v3s16 blockpos,
2188         std::map<v3s16, MapBlock *> *modified_blocks)
2189 {
2190         MapBlock *block = emergeBlock(blockpos, false);
2191         if (!block || !block->isGenerated())
2192                 return false;
2193         voxalgo::repair_block_light(this, block, modified_blocks);
2194         return true;
2195 }
2196
2197 MMVManip::MMVManip(Map *map):
2198                 VoxelManipulator(),
2199                 m_map(map)
2200 {
2201 }
2202
2203 void MMVManip::initialEmerge(v3s16 blockpos_min, v3s16 blockpos_max,
2204         bool load_if_inexistent)
2205 {
2206         TimeTaker timer1("initialEmerge", &emerge_time);
2207
2208         // Units of these are MapBlocks
2209         v3s16 p_min = blockpos_min;
2210         v3s16 p_max = blockpos_max;
2211
2212         VoxelArea block_area_nodes
2213                         (p_min*MAP_BLOCKSIZE, (p_max+1)*MAP_BLOCKSIZE-v3s16(1,1,1));
2214
2215         u32 size_MB = block_area_nodes.getVolume()*4/1000000;
2216         if(size_MB >= 1)
2217         {
2218                 infostream<<"initialEmerge: area: ";
2219                 block_area_nodes.print(infostream);
2220                 infostream<<" ("<<size_MB<<"MB)";
2221                 infostream<<std::endl;
2222         }
2223
2224         addArea(block_area_nodes);
2225
2226         for(s32 z=p_min.Z; z<=p_max.Z; z++)
2227         for(s32 y=p_min.Y; y<=p_max.Y; y++)
2228         for(s32 x=p_min.X; x<=p_max.X; x++)
2229         {
2230                 u8 flags = 0;
2231                 MapBlock *block;
2232                 v3s16 p(x,y,z);
2233                 std::map<v3s16, u8>::iterator n;
2234                 n = m_loaded_blocks.find(p);
2235                 if(n != m_loaded_blocks.end())
2236                         continue;
2237
2238                 bool block_data_inexistent = false;
2239                 try
2240                 {
2241                         TimeTaker timer1("emerge load", &emerge_load_time);
2242
2243                         block = m_map->getBlockNoCreate(p);
2244                         if(block->isDummy())
2245                                 block_data_inexistent = true;
2246                         else
2247                                 block->copyTo(*this);
2248                 }
2249                 catch(InvalidPositionException &e)
2250                 {
2251                         block_data_inexistent = true;
2252                 }
2253
2254                 if(block_data_inexistent)
2255                 {
2256
2257                         if (load_if_inexistent && !blockpos_over_max_limit(p)) {
2258                                 ServerMap *svrmap = (ServerMap *)m_map;
2259                                 block = svrmap->emergeBlock(p, false);
2260                                 if (block == NULL)
2261                                         block = svrmap->createBlock(p);
2262                                 block->copyTo(*this);
2263                         } else {
2264                                 flags |= VMANIP_BLOCK_DATA_INEXIST;
2265
2266                                 /*
2267                                         Mark area inexistent
2268                                 */
2269                                 VoxelArea a(p*MAP_BLOCKSIZE, (p+1)*MAP_BLOCKSIZE-v3s16(1,1,1));
2270                                 // Fill with VOXELFLAG_NO_DATA
2271                                 for(s32 z=a.MinEdge.Z; z<=a.MaxEdge.Z; z++)
2272                                 for(s32 y=a.MinEdge.Y; y<=a.MaxEdge.Y; y++)
2273                                 {
2274                                         s32 i = m_area.index(a.MinEdge.X,y,z);
2275                                         memset(&m_flags[i], VOXELFLAG_NO_DATA, MAP_BLOCKSIZE);
2276                                 }
2277                         }
2278                 }
2279                 /*else if (block->getNode(0, 0, 0).getContent() == CONTENT_IGNORE)
2280                 {
2281                         // Mark that block was loaded as blank
2282                         flags |= VMANIP_BLOCK_CONTAINS_CIGNORE;
2283                 }*/
2284
2285                 m_loaded_blocks[p] = flags;
2286         }
2287
2288         m_is_dirty = false;
2289 }
2290
2291 void MMVManip::blitBackAll(std::map<v3s16, MapBlock*> *modified_blocks,
2292         bool overwrite_generated)
2293 {
2294         if(m_area.getExtent() == v3s16(0,0,0))
2295                 return;
2296
2297         /*
2298                 Copy data of all blocks
2299         */
2300         for (auto &loaded_block : m_loaded_blocks) {
2301                 v3s16 p = loaded_block.first;
2302                 MapBlock *block = m_map->getBlockNoCreateNoEx(p);
2303                 bool existed = !(loaded_block.second & VMANIP_BLOCK_DATA_INEXIST);
2304                 if (!existed || (block == NULL) ||
2305                         (!overwrite_generated && block->isGenerated()))
2306                         continue;
2307
2308                 block->copyFrom(*this);
2309                 block->raiseModified(MOD_STATE_WRITE_NEEDED, MOD_REASON_VMANIP);
2310
2311                 if(modified_blocks)
2312                         (*modified_blocks)[p] = block;
2313         }
2314 }
2315
2316 //END