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 "main.h"
  24 #include "filesys.h"
  25 #include "voxel.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/mathconstants.h"
  36 #include "rollback_interface.h"
  37 #include "environment.h"
  38 #include "emerge.h"
  39 #include "mapgen_v6.h"
  40 #include "biome.h"
  41 #include "config.h"
  42 #include "server.h"
  43 #include "database.h"
  44 #include "database-dummy.h"
  45 #include "database-sqlite3.h"
  46 #if USE_LEVELDB
  47 #include "database-leveldb.h"
  48 #endif
  49
  50 #define PP(x) "("<<(x).X<<","<<(x).Y<<","<<(x).Z<<")"
  51
  52 /*
  53         SQLite format specification:
  54         - Initially only replaces sectors/ and sectors2/
  55
  56         If map.sqlite does not exist in the save dir
  57         or the block was not found in the database
  58         the map will try to load from sectors folder.
  59         In either case, map.sqlite will be created
  60         and all future saves will save there.
  61
  62         Structure of map.sqlite:
  63         Tables:
  64                 blocks
  65                         (PK) INT pos
  66                         BLOB data
  67 */
  68
  69 /*
  70         Map
  71 */
  72
  73 Map::Map(std::ostream &dout, IGameDef *gamedef):
  74         m_dout(dout),
  75         m_gamedef(gamedef),
  76         m_sector_cache(NULL)
  77 {
  78 }
  79
  80 Map::~Map()
  81 {
  82         /*
  83                 Free all MapSectors
  84         */
  85         for(std::map<v2s16, MapSector*>::iterator i = m_sectors.begin();
  86                 i != m_sectors.end(); ++i)
  87         {
  88                 delete i->second;
  89         }
  90 }
  91
  92 void Map::addEventReceiver(MapEventReceiver *event_receiver)
  93 {
  94         m_event_receivers.insert(event_receiver);
  95 }
  96
  97 void Map::removeEventReceiver(MapEventReceiver *event_receiver)
  98 {
  99         m_event_receivers.erase(event_receiver);
 100 }
 101
 102 void Map::dispatchEvent(MapEditEvent *event)
 103 {
 104         for(std::set<MapEventReceiver*>::iterator
 105                         i = m_event_receivers.begin();
 106                         i != m_event_receivers.end(); ++i)
 107         {
 108                 (*i)->onMapEditEvent(event);
 109         }
 110 }
 111
 112 MapSector * Map::getSectorNoGenerateNoExNoLock(v2s16 p)
 113 {
 114         if(m_sector_cache != NULL && p == m_sector_cache_p){
 115                 MapSector * sector = m_sector_cache;
 116                 return sector;
 117         }
 118
 119         std::map<v2s16, MapSector*>::iterator n = m_sectors.find(p);
 120
 121         if(n == m_sectors.end())
 122                 return NULL;
 123
 124         MapSector *sector = n->second;
 125
 126         // Cache the last result
 127         m_sector_cache_p = p;
 128         m_sector_cache = sector;
 129
 130         return sector;
 131 }
 132
 133 MapSector * Map::getSectorNoGenerateNoEx(v2s16 p)
 134 {
 135         return getSectorNoGenerateNoExNoLock(p);
 136 }
 137
 138 MapSector * Map::getSectorNoGenerate(v2s16 p)
 139 {
 140         MapSector *sector = getSectorNoGenerateNoEx(p);
 141         if(sector == NULL)
 142                 throw InvalidPositionException();
 143
 144         return sector;
 145 }
 146
 147 MapBlock * Map::getBlockNoCreateNoEx(v3s16 p3d)
 148 {
 149         v2s16 p2d(p3d.X, p3d.Z);
 150         MapSector * sector = getSectorNoGenerateNoEx(p2d);
 151         if(sector == NULL)
 152                 return NULL;
 153         MapBlock *block = sector->getBlockNoCreateNoEx(p3d.Y);
 154         return block;
 155 }
 156
 157 MapBlock * Map::getBlockNoCreate(v3s16 p3d)
 158 {
 159         MapBlock *block = getBlockNoCreateNoEx(p3d);
 160         if(block == NULL)
 161                 throw InvalidPositionException();
 162         return block;
 163 }
 164
 165 bool Map::isNodeUnderground(v3s16 p)
 166 {
 167         v3s16 blockpos = getNodeBlockPos(p);
 168         try{
 169                 MapBlock * block = getBlockNoCreate(blockpos);
 170                 return block->getIsUnderground();
 171         }
 172         catch(InvalidPositionException &e)
 173         {
 174                 return false;
 175         }
 176 }
 177
 178 bool Map::isValidPosition(v3s16 p)
 179 {
 180         v3s16 blockpos = getNodeBlockPos(p);
 181         MapBlock *block = getBlockNoCreate(blockpos);
 182         return (block != NULL);
 183 }
 184
 185 // Returns a CONTENT_IGNORE node if not found
 186 MapNode Map::getNodeNoEx(v3s16 p)
 187 {
 188         v3s16 blockpos = getNodeBlockPos(p);
 189         MapBlock *block = getBlockNoCreateNoEx(blockpos);
 190         if(block == NULL)
 191                 return MapNode(CONTENT_IGNORE);
 192         v3s16 relpos = p - blockpos*MAP_BLOCKSIZE;
 193         return block->getNodeNoCheck(relpos);
 194 }
 195
 196 // throws InvalidPositionException if not found
 197 MapNode Map::getNode(v3s16 p)
 198 {
 199         v3s16 blockpos = getNodeBlockPos(p);
 200         MapBlock *block = getBlockNoCreateNoEx(blockpos);
 201         if(block == NULL)
 202                 throw InvalidPositionException();
 203         v3s16 relpos = p - blockpos*MAP_BLOCKSIZE;
 204         return block->getNodeNoCheck(relpos);
 205 }
 206
 207 // throws InvalidPositionException if not found
 208 void Map::setNode(v3s16 p, MapNode & n)
 209 {
 210         v3s16 blockpos = getNodeBlockPos(p);
 211         MapBlock *block = getBlockNoCreate(blockpos);
 212         v3s16 relpos = p - blockpos*MAP_BLOCKSIZE;
 213         // Never allow placing CONTENT_IGNORE, it fucks up stuff
 214         if(n.getContent() == CONTENT_IGNORE){
 215                 errorstream<<"Map::setNode(): Not allowing to place CONTENT_IGNORE"
 216                                 <<" while trying to replace \""
 217                                 <<m_gamedef->ndef()->get(block->getNodeNoCheck(relpos)).name
 218                                 <<"\" at "<<PP(p)<<" (block "<<PP(blockpos)<<")"<<std::endl;
 219                 debug_stacks_print_to(infostream);
 220                 return;
 221         }
 222         block->setNodeNoCheck(relpos, n);
 223 }
 224
 225
 226 /*
 227         Goes recursively through the neighbours of the node.
 228
 229         Alters only transparent nodes.
 230
 231         If the lighting of the neighbour is lower than the lighting of
 232         the node was (before changing it to 0 at the step before), the
 233         lighting of the neighbour is set to 0 and then the same stuff
 234         repeats for the neighbour.
 235
 236         The ending nodes of the routine are stored in light_sources.
 237         This is useful when a light is removed. In such case, this
 238         routine can be called for the light node and then again for
 239         light_sources to re-light the area without the removed light.
 240
 241         values of from_nodes are lighting values.
 242 */
 243 void Map::unspreadLight(enum LightBank bank,
 244                 std::map<v3s16, u8> & from_nodes,
 245                 std::set<v3s16> & light_sources,
 246                 std::map<v3s16, MapBlock*>  & modified_blocks)
 247 {
 248         INodeDefManager *nodemgr = m_gamedef->ndef();
 249
 250         v3s16 dirs[6] = {
 251                 v3s16(0,0,1), // back
 252                 v3s16(0,1,0), // top
 253                 v3s16(1,0,0), // right
 254                 v3s16(0,0,-1), // front
 255                 v3s16(0,-1,0), // bottom
 256                 v3s16(-1,0,0), // left
 257         };
 258
 259         if(from_nodes.size() == 0)
 260                 return;
 261
 262         u32 blockchangecount = 0;
 263
 264         std::map<v3s16, u8> unlighted_nodes;
 265
 266         /*
 267                 Initialize block cache
 268         */
 269         v3s16 blockpos_last;
 270         MapBlock *block = NULL;
 271         // Cache this a bit, too
 272         bool block_checked_in_modified = false;
 273
 274         for(std::map<v3s16, u8>::iterator j = from_nodes.begin();
 275                 j != from_nodes.end(); ++j)
 276         {
 277                 v3s16 pos = j->first;
 278                 v3s16 blockpos = getNodeBlockPos(pos);
 279
 280                 // Only fetch a new block if the block position has changed
 281                 try{
 282                         if(block == NULL || blockpos != blockpos_last){
 283                                 block = getBlockNoCreate(blockpos);
 284                                 blockpos_last = blockpos;
 285
 286                                 block_checked_in_modified = false;
 287                                 blockchangecount++;
 288                         }
 289                 }
 290                 catch(InvalidPositionException &e)
 291                 {
 292                         continue;
 293                 }
 294
 295                 if(block->isDummy())
 296                         continue;
 297
 298                 // Calculate relative position in block
 299                 //v3s16 relpos = pos - blockpos_last * MAP_BLOCKSIZE;
 300
 301                 // Get node straight from the block
 302                 //MapNode n = block->getNode(relpos);
 303
 304                 u8 oldlight = j->second;
 305
 306                 // Loop through 6 neighbors
 307                 for(u16 i=0; i<6; i++)
 308                 {
 309                         // Get the position of the neighbor node
 310                         v3s16 n2pos = pos + dirs[i];
 311
 312                         // Get the block where the node is located
 313                         v3s16 blockpos = getNodeBlockPos(n2pos);
 314
 315                         try
 316                         {
 317                                 // Only fetch a new block if the block position has changed
 318                                 try{
 319                                         if(block == NULL || blockpos != blockpos_last){
 320                                                 block = getBlockNoCreate(blockpos);
 321                                                 blockpos_last = blockpos;
 322
 323                                                 block_checked_in_modified = false;
 324                                                 blockchangecount++;
 325                                         }
 326                                 }
 327                                 catch(InvalidPositionException &e)
 328                                 {
 329                                         continue;
 330                                 }
 331
 332                                 // Calculate relative position in block
 333                                 v3s16 relpos = n2pos - blockpos * MAP_BLOCKSIZE;
 334                                 // Get node straight from the block
 335                                 MapNode n2 = block->getNode(relpos);
 336
 337                                 bool changed = false;
 338
 339                                 //TODO: Optimize output by optimizing light_sources?
 340
 341                                 /*
 342                                         If the neighbor is dimmer than what was specified
 343                                         as oldlight (the light of the previous node)
 344                                 */
 345                                 if(n2.getLight(bank, nodemgr) < oldlight)
 346                                 {
 347                                         /*
 348                                                 And the neighbor is transparent and it has some light
 349                                         */
 350                                         if(nodemgr->get(n2).light_propagates
 351                                                         && n2.getLight(bank, nodemgr) != 0)
 352                                         {
 353                                                 /*
 354                                                         Set light to 0 and add to queue
 355                                                 */
 356
 357                                                 u8 current_light = n2.getLight(bank, nodemgr);
 358                                                 n2.setLight(bank, 0, nodemgr);
 359                                                 block->setNode(relpos, n2);
 360
 361                                                 unlighted_nodes[n2pos] = current_light;
 362                                                 changed = true;
 363
 364                                                 /*
 365                                                         Remove from light_sources if it is there
 366                                                         NOTE: This doesn't happen nearly at all
 367                                                 */
 368                                                 /*if(light_sources.find(n2pos))
 369                                                 {
 370                                                         infostream<<"Removed from light_sources"<<std::endl;
 371                                                         light_sources.remove(n2pos);
 372                                                 }*/
 373                                         }
 374
 375                                         /*// DEBUG
 376                                         if(light_sources.find(n2pos) != NULL)
 377                                                 light_sources.remove(n2pos);*/
 378                                 }
 379                                 else{
 380                                         light_sources.insert(n2pos);
 381                                 }
 382
 383                                 // Add to modified_blocks
 384                                 if(changed == true && block_checked_in_modified == false)
 385                                 {
 386                                         // If the block is not found in modified_blocks, add.
 387                                         if(modified_blocks.find(blockpos) == modified_blocks.end())
 388                                         {
 389                                                 modified_blocks[blockpos] = block;
 390                                         }
 391                                         block_checked_in_modified = true;
 392                                 }
 393                         }
 394                         catch(InvalidPositionException &e)
 395                         {
 396                                 continue;
 397                         }
 398                 }
 399         }
 400
 401         /*infostream<<"unspreadLight(): Changed block "
 402                         <<blockchangecount<<" times"
 403                         <<" for "<<from_nodes.size()<<" nodes"
 404                         <<std::endl;*/
 405
 406         if(unlighted_nodes.size() > 0)
 407                 unspreadLight(bank, unlighted_nodes, light_sources, modified_blocks);
 408 }
 409
 410 /*
 411         A single-node wrapper of the above
 412 */
 413 void Map::unLightNeighbors(enum LightBank bank,
 414                 v3s16 pos, u8 lightwas,
 415                 std::set<v3s16> & light_sources,
 416                 std::map<v3s16, MapBlock*>  & modified_blocks)
 417 {
 418         std::map<v3s16, u8> from_nodes;
 419         from_nodes[pos] = lightwas;
 420
 421         unspreadLight(bank, from_nodes, light_sources, modified_blocks);
 422 }
 423
 424 /*
 425         Lights neighbors of from_nodes, collects all them and then
 426         goes on recursively.
 427 */
 428 void Map::spreadLight(enum LightBank bank,
 429                 std::set<v3s16> & from_nodes,
 430                 std::map<v3s16, MapBlock*> & modified_blocks)
 431 {
 432         INodeDefManager *nodemgr = m_gamedef->ndef();
 433
 434         const v3s16 dirs[6] = {
 435                 v3s16(0,0,1), // back
 436                 v3s16(0,1,0), // top
 437                 v3s16(1,0,0), // right
 438                 v3s16(0,0,-1), // front
 439                 v3s16(0,-1,0), // bottom
 440                 v3s16(-1,0,0), // left
 441         };
 442
 443         if(from_nodes.size() == 0)
 444                 return;
 445
 446         u32 blockchangecount = 0;
 447
 448         std::set<v3s16> lighted_nodes;
 449
 450         /*
 451                 Initialize block cache
 452         */
 453         v3s16 blockpos_last;
 454         MapBlock *block = NULL;
 455         // Cache this a bit, too
 456         bool block_checked_in_modified = false;
 457
 458         for(std::set<v3s16>::iterator j = from_nodes.begin();
 459                 j != from_nodes.end(); ++j)
 460         {
 461                 v3s16 pos = *j;
 462                 v3s16 blockpos = getNodeBlockPos(pos);
 463
 464                 // Only fetch a new block if the block position has changed
 465                 try{
 466                         if(block == NULL || blockpos != blockpos_last){
 467                                 block = getBlockNoCreate(blockpos);
 468                                 blockpos_last = blockpos;
 469
 470                                 block_checked_in_modified = false;
 471                                 blockchangecount++;
 472                         }
 473                 }
 474                 catch(InvalidPositionException &e)
 475                 {
 476                         continue;
 477                 }
 478
 479                 if(block->isDummy())
 480                         continue;
 481
 482                 // Calculate relative position in block
 483                 v3s16 relpos = pos - blockpos_last * MAP_BLOCKSIZE;
 484
 485                 // Get node straight from the block
 486                 MapNode n = block->getNode(relpos);
 487
 488                 u8 oldlight = n.getLight(bank, nodemgr);
 489                 u8 newlight = diminish_light(oldlight);
 490
 491                 // Loop through 6 neighbors
 492                 for(u16 i=0; i<6; i++){
 493                         // Get the position of the neighbor node
 494                         v3s16 n2pos = pos + dirs[i];
 495
 496                         // Get the block where the node is located
 497                         v3s16 blockpos = getNodeBlockPos(n2pos);
 498
 499                         try
 500                         {
 501                                 // Only fetch a new block if the block position has changed
 502                                 try{
 503                                         if(block == NULL || blockpos != blockpos_last){
 504                                                 block = getBlockNoCreate(blockpos);
 505                                                 blockpos_last = blockpos;
 506
 507                                                 block_checked_in_modified = false;
 508                                                 blockchangecount++;
 509                                         }
 510                                 }
 511                                 catch(InvalidPositionException &e)
 512                                 {
 513                                         continue;
 514                                 }
 515
 516                                 // Calculate relative position in block
 517                                 v3s16 relpos = n2pos - blockpos * MAP_BLOCKSIZE;
 518                                 // Get node straight from the block
 519                                 MapNode n2 = block->getNode(relpos);
 520
 521                                 bool changed = false;
 522                                 /*
 523                                         If the neighbor is brighter than the current node,
 524                                         add to list (it will light up this node on its turn)
 525                                 */
 526                                 if(n2.getLight(bank, nodemgr) > undiminish_light(oldlight))
 527                                 {
 528                                         lighted_nodes.insert(n2pos);
 529                                         changed = true;
 530                                 }
 531                                 /*
 532                                         If the neighbor is dimmer than how much light this node
 533                                         would spread on it, add to list
 534                                 */
 535                                 if(n2.getLight(bank, nodemgr) < newlight)
 536                                 {
 537                                         if(nodemgr->get(n2).light_propagates)
 538                                         {
 539                                                 n2.setLight(bank, newlight, nodemgr);
 540                                                 block->setNode(relpos, n2);
 541                                                 lighted_nodes.insert(n2pos);
 542                                                 changed = true;
 543                                         }
 544                                 }
 545
 546                                 // Add to modified_blocks
 547                                 if(changed == true && block_checked_in_modified == false)
 548                                 {
 549                                         // If the block is not found in modified_blocks, add.
 550                                         if(modified_blocks.find(blockpos) == modified_blocks.end())
 551                                         {
 552                                                 modified_blocks[blockpos] = block;
 553                                         }
 554                                         block_checked_in_modified = true;
 555                                 }
 556                         }
 557                         catch(InvalidPositionException &e)
 558                         {
 559                                 continue;
 560                         }
 561                 }
 562         }
 563
 564         /*infostream<<"spreadLight(): Changed block "
 565                         <<blockchangecount<<" times"
 566                         <<" for "<<from_nodes.size()<<" nodes"
 567                         <<std::endl;*/
 568
 569         if(lighted_nodes.size() > 0)
 570                 spreadLight(bank, lighted_nodes, modified_blocks);
 571 }
 572
 573 /*
 574         A single-node source variation of the above.
 575 */
 576 void Map::lightNeighbors(enum LightBank bank,
 577                 v3s16 pos,
 578                 std::map<v3s16, MapBlock*> & modified_blocks)
 579 {
 580         std::set<v3s16> from_nodes;
 581         from_nodes.insert(pos);
 582         spreadLight(bank, from_nodes, modified_blocks);
 583 }
 584
 585 v3s16 Map::getBrightestNeighbour(enum LightBank bank, v3s16 p)
 586 {
 587         INodeDefManager *nodemgr = m_gamedef->ndef();
 588
 589         v3s16 dirs[6] = {
 590                 v3s16(0,0,1), // back
 591                 v3s16(0,1,0), // top
 592                 v3s16(1,0,0), // right
 593                 v3s16(0,0,-1), // front
 594                 v3s16(0,-1,0), // bottom
 595                 v3s16(-1,0,0), // left
 596         };
 597
 598         u8 brightest_light = 0;
 599         v3s16 brightest_pos(0,0,0);
 600         bool found_something = false;
 601
 602         // Loop through 6 neighbors
 603         for(u16 i=0; i<6; i++){
 604                 // Get the position of the neighbor node
 605                 v3s16 n2pos = p + dirs[i];
 606                 MapNode n2;
 607                 try{
 608                         n2 = getNode(n2pos);
 609                 }
 610                 catch(InvalidPositionException &e)
 611                 {
 612                         continue;
 613                 }
 614                 if(n2.getLight(bank, nodemgr) > brightest_light || found_something == false){
 615                         brightest_light = n2.getLight(bank, nodemgr);
 616                         brightest_pos = n2pos;
 617                         found_something = true;
 618                 }
 619         }
 620
 621         if(found_something == false)
 622                 throw InvalidPositionException();
 623
 624         return brightest_pos;
 625 }
 626
 627 /*
 628         Propagates sunlight down from a node.
 629         Starting point gets sunlight.
 630
 631         Returns the lowest y value of where the sunlight went.
 632
 633         Mud is turned into grass in where the sunlight stops.
 634 */
 635 s16 Map::propagateSunlight(v3s16 start,
 636                 std::map<v3s16, MapBlock*> & modified_blocks)
 637 {
 638         INodeDefManager *nodemgr = m_gamedef->ndef();
 639
 640         s16 y = start.Y;
 641         for(; ; y--)
 642         {
 643                 v3s16 pos(start.X, y, start.Z);
 644
 645                 v3s16 blockpos = getNodeBlockPos(pos);
 646                 MapBlock *block;
 647                 try{
 648                         block = getBlockNoCreate(blockpos);
 649                 }
 650                 catch(InvalidPositionException &e)
 651                 {
 652                         break;
 653                 }
 654
 655                 v3s16 relpos = pos - blockpos*MAP_BLOCKSIZE;
 656                 MapNode n = block->getNode(relpos);
 657
 658                 if(nodemgr->get(n).sunlight_propagates)
 659                 {
 660                         n.setLight(LIGHTBANK_DAY, LIGHT_SUN, nodemgr);
 661                         block->setNode(relpos, n);
 662
 663                         modified_blocks[blockpos] = block;
 664                 }
 665                 else
 666                 {
 667                         // Sunlight goes no further
 668                         break;
 669                 }
 670         }
 671         return y + 1;
 672 }
 673
 674 void Map::updateLighting(enum LightBank bank,
 675                 std::map<v3s16, MapBlock*> & a_blocks,
 676                 std::map<v3s16, MapBlock*> & modified_blocks)
 677 {
 678         INodeDefManager *nodemgr = m_gamedef->ndef();
 679
 680         /*m_dout<<DTIME<<"Map::updateLighting(): "
 681                         <<a_blocks.size()<<" blocks."<<std::endl;*/
 682
 683         //TimeTaker timer("updateLighting");
 684
 685         // For debugging
 686         //bool debug=true;
 687         //u32 count_was = modified_blocks.size();
 688
 689         std::map<v3s16, MapBlock*> blocks_to_update;
 690
 691         std::set<v3s16> light_sources;
 692
 693         std::map<v3s16, u8> unlight_from;
 694
 695         int num_bottom_invalid = 0;
 696
 697         {
 698         //TimeTaker t("first stuff");
 699
 700         for(std::map<v3s16, MapBlock*>::iterator i = a_blocks.begin();
 701                 i != a_blocks.end(); ++i)
 702         {
 703                 MapBlock *block = i->second;
 704
 705                 for(;;)
 706                 {
 707                         // Don't bother with dummy blocks.
 708                         if(block->isDummy())
 709                                 break;
 710
 711                         v3s16 pos = block->getPos();
 712                         v3s16 posnodes = block->getPosRelative();
 713                         modified_blocks[pos] = block;
 714                         blocks_to_update[pos] = block;
 715
 716                         /*
 717                                 Clear all light from block
 718                         */
 719                         for(s16 z=0; z<MAP_BLOCKSIZE; z++)
 720                         for(s16 x=0; x<MAP_BLOCKSIZE; x++)
 721                         for(s16 y=0; y<MAP_BLOCKSIZE; y++)
 722                         {
 723
 724                                 try{
 725                                         v3s16 p(x,y,z);
 726                                         MapNode n = block->getNode(p);
 727                                         u8 oldlight = n.getLight(bank, nodemgr);
 728                                         n.setLight(bank, 0, nodemgr);
 729                                         block->setNode(p, n);
 730
 731                                         // If node sources light, add to list
 732                                         u8 source = nodemgr->get(n).light_source;
 733                                         if(source != 0)
 734                                                 light_sources.insert(p + posnodes);
 735
 736                                         // Collect borders for unlighting
 737                                         if((x==0 || x == MAP_BLOCKSIZE-1
 738                                         || y==0 || y == MAP_BLOCKSIZE-1
 739                                         || z==0 || z == MAP_BLOCKSIZE-1)
 740                                         && oldlight != 0)
 741                                         {
 742                                                 v3s16 p_map = p + posnodes;
 743                                                 unlight_from[p_map] = oldlight;
 744                                         }
 745                                 }
 746                                 catch(InvalidPositionException &e)
 747                                 {
 748                                         /*
 749                                                 This would happen when dealing with a
 750                                                 dummy block.
 751                                         */
 752                                         //assert(0);
 753                                         infostream<<"updateLighting(): InvalidPositionException"
 754                                                         <<std::endl;
 755                                 }
 756                         }
 757
 758                         if(bank == LIGHTBANK_DAY)
 759                         {
 760                                 bool bottom_valid = block->propagateSunlight(light_sources);
 761
 762                                 if(!bottom_valid)
 763                                         num_bottom_invalid++;
 764
 765                                 // If bottom is valid, we're done.
 766                                 if(bottom_valid)
 767                                         break;
 768                         }
 769                         else if(bank == LIGHTBANK_NIGHT)
 770                         {
 771                                 // For night lighting, sunlight is not propagated
 772                                 break;
 773                         }
 774                         else
 775                         {
 776                                 // Invalid lighting bank
 777                                 assert(0);
 778                         }
 779
 780                         /*infostream<<"Bottom for sunlight-propagated block ("
 781                                         <<pos.X<<","<<pos.Y<<","<<pos.Z<<") not valid"
 782                                         <<std::endl;*/
 783
 784                         // Bottom sunlight is not valid; get the block and loop to it
 785
 786                         pos.Y--;
 787                         try{
 788                                 block = getBlockNoCreate(pos);
 789                         }
 790                         catch(InvalidPositionException &e)
 791                         {
 792                                 assert(0);
 793                         }
 794
 795                 }
 796         }
 797
 798         }
 799
 800         /*
 801                 Enable this to disable proper lighting for speeding up map
 802                 generation for testing or whatever
 803         */
 804 #if 0
 805         //if(g_settings->get(""))
 806         {
 807                 core::map<v3s16, MapBlock*>::Iterator i;
 808                 i = blocks_to_update.getIterator();
 809                 for(; i.atEnd() == false; i++)
 810                 {
 811                         MapBlock *block = i.getNode()->getValue();
 812                         v3s16 p = block->getPos();
 813                         block->setLightingExpired(false);
 814                 }
 815                 return;
 816         }
 817 #endif
 818
 819 #if 1
 820         {
 821                 //TimeTaker timer("unspreadLight");
 822                 unspreadLight(bank, unlight_from, light_sources, modified_blocks);
 823         }
 824
 825         /*if(debug)
 826         {
 827                 u32 diff = modified_blocks.size() - count_was;
 828                 count_was = modified_blocks.size();
 829                 infostream<<"unspreadLight modified "<<diff<<std::endl;
 830         }*/
 831
 832         {
 833                 //TimeTaker timer("spreadLight");
 834                 spreadLight(bank, light_sources, modified_blocks);
 835         }
 836
 837         /*if(debug)
 838         {
 839                 u32 diff = modified_blocks.size() - count_was;
 840                 count_was = modified_blocks.size();
 841                 infostream<<"spreadLight modified "<<diff<<std::endl;
 842         }*/
 843 #endif
 844
 845 #if 0
 846         {
 847                 //MapVoxelManipulator vmanip(this);
 848
 849                 // Make a manual voxel manipulator and load all the blocks
 850                 // that touch the requested blocks
 851                 ManualMapVoxelManipulator vmanip(this);
 852
 853                 {
 854                 //TimeTaker timer("initialEmerge");
 855
 856                 core::map<v3s16, MapBlock*>::Iterator i;
 857                 i = blocks_to_update.getIterator();
 858                 for(; i.atEnd() == false; i++)
 859                 {
 860                         MapBlock *block = i.getNode()->getValue();
 861                         v3s16 p = block->getPos();
 862
 863                         // Add all surrounding blocks
 864                         vmanip.initialEmerge(p - v3s16(1,1,1), p + v3s16(1,1,1));
 865
 866                         /*
 867                                 Add all surrounding blocks that have up-to-date lighting
 868                                 NOTE: This doesn't quite do the job (not everything
 869                                           appropriate is lighted)
 870                         */
 871                         /*for(s16 z=-1; z<=1; z++)
 872                         for(s16 y=-1; y<=1; y++)
 873                         for(s16 x=-1; x<=1; x++)
 874                         {
 875                                 v3s16 p2 = p + v3s16(x,y,z);
 876                                 MapBlock *block = getBlockNoCreateNoEx(p2);
 877                                 if(block == NULL)
 878                                         continue;
 879                                 if(block->isDummy())
 880                                         continue;
 881                                 if(block->getLightingExpired())
 882                                         continue;
 883                                 vmanip.initialEmerge(p2, p2);
 884                         }*/
 885
 886                         // Lighting of block will be updated completely
 887                         block->setLightingExpired(false);
 888                 }
 889                 }
 890
 891                 {
 892                         //TimeTaker timer("unSpreadLight");
 893                         vmanip.unspreadLight(bank, unlight_from, light_sources, nodemgr);
 894                 }
 895                 {
 896                         //TimeTaker timer("spreadLight");
 897                         vmanip.spreadLight(bank, light_sources, nodemgr);
 898                 }
 899                 {
 900                         //TimeTaker timer("blitBack");
 901                         vmanip.blitBack(modified_blocks);
 902                 }
 903                 /*infostream<<"emerge_time="<<emerge_time<<std::endl;
 904                 emerge_time = 0;*/
 905         }
 906 #endif
 907
 908         //m_dout<<"Done ("<<getTimestamp()<<")"<<std::endl;
 909 }
 910
 911 void Map::updateLighting(std::map<v3s16, MapBlock*> & a_blocks,
 912                 std::map<v3s16, MapBlock*> & modified_blocks)
 913 {
 914         updateLighting(LIGHTBANK_DAY, a_blocks, modified_blocks);
 915         updateLighting(LIGHTBANK_NIGHT, a_blocks, modified_blocks);
 916
 917         /*
 918                 Update information about whether day and night light differ
 919         */
 920         for(std::map<v3s16, MapBlock*>::iterator
 921                         i = modified_blocks.begin();
 922                         i != modified_blocks.end(); ++i)
 923         {
 924                 MapBlock *block = i->second;
 925                 block->expireDayNightDiff();
 926         }
 927 }
 928
 929 /*
 930 */
 931 void Map::addNodeAndUpdate(v3s16 p, MapNode n,
 932                 std::map<v3s16, MapBlock*> &modified_blocks,
 933                 bool remove_metadata)
 934 {
 935         INodeDefManager *ndef = m_gamedef->ndef();
 936
 937         /*PrintInfo(m_dout);
 938         m_dout<<DTIME<<"Map::addNodeAndUpdate(): p=("
 939                         <<p.X<<","<<p.Y<<","<<p.Z<<")"<<std::endl;*/
 940
 941         /*
 942                 From this node to nodes underneath:
 943                 If lighting is sunlight (1.0), unlight neighbours and
 944                 set lighting to 0.
 945                 Else discontinue.
 946         */
 947
 948         v3s16 toppos = p + v3s16(0,1,0);
 949         //v3s16 bottompos = p + v3s16(0,-1,0);
 950
 951         bool node_under_sunlight = true;
 952         std::set<v3s16> light_sources;
 953
 954         /*
 955                 Collect old node for rollback
 956         */
 957         RollbackNode rollback_oldnode(this, p, m_gamedef);
 958
 959         /*
 960                 If there is a node at top and it doesn't have sunlight,
 961                 there has not been any sunlight going down.
 962
 963                 Otherwise there probably is.
 964         */
 965         try{
 966                 MapNode topnode = getNode(toppos);
 967
 968                 if(topnode.getLight(LIGHTBANK_DAY, ndef) != LIGHT_SUN)
 969                         node_under_sunlight = false;
 970         }
 971         catch(InvalidPositionException &e)
 972         {
 973         }
 974
 975         /*
 976                 Remove all light that has come out of this node
 977         */
 978
 979         enum LightBank banks[] =
 980         {
 981                 LIGHTBANK_DAY,
 982                 LIGHTBANK_NIGHT
 983         };
 984         for(s32 i=0; i<2; i++)
 985         {
 986                 enum LightBank bank = banks[i];
 987
 988                 u8 lightwas = getNode(p).getLight(bank, ndef);
 989
 990                 // Add the block of the added node to modified_blocks
 991                 v3s16 blockpos = getNodeBlockPos(p);
 992                 MapBlock * block = getBlockNoCreate(blockpos);
 993                 assert(block != NULL);
 994                 modified_blocks[blockpos] = block;
 995
 996                 assert(isValidPosition(p));
 997
 998                 // Unlight neighbours of node.
 999                 // This means setting light of all consequent dimmer nodes
1000                 // to 0.
1001                 // This also collects the nodes at the border which will spread
1002                 // light again into this.
1003                 unLightNeighbors(bank, p, lightwas, light_sources, modified_blocks);
1004
1005                 n.setLight(bank, 0, ndef);
1006         }
1007
1008         /*
1009                 If node lets sunlight through and is under sunlight, it has
1010                 sunlight too.
1011         */
1012         if(node_under_sunlight && ndef->get(n).sunlight_propagates)
1013         {
1014                 n.setLight(LIGHTBANK_DAY, LIGHT_SUN, ndef);
1015         }
1016
1017         /*
1018                 Remove node metadata
1019         */
1020         if (remove_metadata) {
1021                 removeNodeMetadata(p);
1022         }
1023
1024         /*
1025                 Set the node on the map
1026         */
1027
1028         setNode(p, n);
1029
1030         /*
1031                 If node is under sunlight and doesn't let sunlight through,
1032                 take all sunlighted nodes under it and clear light from them
1033                 and from where the light has been spread.
1034                 TODO: This could be optimized by mass-unlighting instead
1035                           of looping
1036         */
1037         if(node_under_sunlight && !ndef->get(n).sunlight_propagates)
1038         {
1039                 s16 y = p.Y - 1;
1040                 for(;; y--){
1041                         //m_dout<<DTIME<<"y="<<y<<std::endl;
1042                         v3s16 n2pos(p.X, y, p.Z);
1043
1044                         MapNode n2;
1045                         try{
1046                                 n2 = getNode(n2pos);
1047                         }
1048                         catch(InvalidPositionException &e)
1049                         {
1050                                 break;
1051                         }
1052
1053                         if(n2.getLight(LIGHTBANK_DAY, ndef) == LIGHT_SUN)
1054                         {
1055                                 unLightNeighbors(LIGHTBANK_DAY,
1056                                                 n2pos, n2.getLight(LIGHTBANK_DAY, ndef),
1057                                                 light_sources, modified_blocks);
1058                                 n2.setLight(LIGHTBANK_DAY, 0, ndef);
1059                                 setNode(n2pos, n2);
1060                         }
1061                         else
1062                                 break;
1063                 }
1064         }
1065
1066         for(s32 i=0; i<2; i++)
1067         {
1068                 enum LightBank bank = banks[i];
1069
1070                 /*
1071                         Spread light from all nodes that might be capable of doing so
1072                 */
1073                 spreadLight(bank, light_sources, modified_blocks);
1074         }
1075
1076         /*
1077                 Update information about whether day and night light differ
1078         */
1079         for(std::map<v3s16, MapBlock*>::iterator
1080                         i = modified_blocks.begin();
1081                         i != modified_blocks.end(); ++i)
1082         {
1083                 i->second->expireDayNightDiff();
1084         }
1085
1086         /*
1087                 Report for rollback
1088         */
1089         if(m_gamedef->rollback())
1090         {
1091                 RollbackNode rollback_newnode(this, p, m_gamedef);
1092                 RollbackAction action;
1093                 action.setSetNode(p, rollback_oldnode, rollback_newnode);
1094                 m_gamedef->rollback()->reportAction(action);
1095         }
1096
1097         /*
1098                 Add neighboring liquid nodes and the node itself if it is
1099                 liquid (=water node was added) to transform queue.
1100                 note: todo: for liquid_finite enough to add only self node
1101         */
1102         v3s16 dirs[7] = {
1103                 v3s16(0,0,0), // self
1104                 v3s16(0,0,1), // back
1105                 v3s16(0,1,0), // top
1106                 v3s16(1,0,0), // right
1107                 v3s16(0,0,-1), // front
1108                 v3s16(0,-1,0), // bottom
1109                 v3s16(-1,0,0), // left
1110         };
1111         for(u16 i=0; i<7; i++)
1112         {
1113                 try
1114                 {
1115
1116                 v3s16 p2 = p + dirs[i];
1117
1118                 MapNode n2 = getNode(p2);
1119                 if(ndef->get(n2).isLiquid() || n2.getContent() == CONTENT_AIR)
1120                 {
1121                         m_transforming_liquid.push_back(p2);
1122                 }
1123
1124                 }catch(InvalidPositionException &e)
1125                 {
1126                 }
1127         }
1128 }
1129
1130 /*
1131 */
1132 void Map::removeNodeAndUpdate(v3s16 p,
1133                 std::map<v3s16, MapBlock*> &modified_blocks)
1134 {
1135         INodeDefManager *ndef = m_gamedef->ndef();
1136
1137         /*PrintInfo(m_dout);
1138         m_dout<<DTIME<<"Map::removeNodeAndUpdate(): p=("
1139                         <<p.X<<","<<p.Y<<","<<p.Z<<")"<<std::endl;*/
1140
1141         bool node_under_sunlight = true;
1142
1143         v3s16 toppos = p + v3s16(0,1,0);
1144
1145         // Node will be replaced with this
1146         content_t replace_material = CONTENT_AIR;
1147
1148         /*
1149                 Collect old node for rollback
1150         */
1151         RollbackNode rollback_oldnode(this, p, m_gamedef);
1152
1153         /*
1154                 If there is a node at top and it doesn't have sunlight,
1155                 there will be no sunlight going down.
1156         */
1157         try{
1158                 MapNode topnode = getNode(toppos);
1159
1160                 if(topnode.getLight(LIGHTBANK_DAY, ndef) != LIGHT_SUN)
1161                         node_under_sunlight = false;
1162         }
1163         catch(InvalidPositionException &e)
1164         {
1165         }
1166
1167         std::set<v3s16> light_sources;
1168
1169         enum LightBank banks[] =
1170         {
1171                 LIGHTBANK_DAY,
1172                 LIGHTBANK_NIGHT
1173         };
1174         for(s32 i=0; i<2; i++)
1175         {
1176                 enum LightBank bank = banks[i];
1177
1178                 /*
1179                         Unlight neighbors (in case the node is a light source)
1180                 */
1181                 unLightNeighbors(bank, p,
1182                                 getNode(p).getLight(bank, ndef),
1183                                 light_sources, modified_blocks);
1184         }
1185
1186         /*
1187                 Remove node metadata
1188         */
1189
1190         removeNodeMetadata(p);
1191
1192         /*
1193                 Remove the node.
1194                 This also clears the lighting.
1195         */
1196
1197         MapNode n;
1198         n.setContent(replace_material);
1199         setNode(p, n);
1200
1201         for(s32 i=0; i<2; i++)
1202         {
1203                 enum LightBank bank = banks[i];
1204
1205                 /*
1206                         Recalculate lighting
1207                 */
1208                 spreadLight(bank, light_sources, modified_blocks);
1209         }
1210
1211         // Add the block of the removed node to modified_blocks
1212         v3s16 blockpos = getNodeBlockPos(p);
1213         MapBlock * block = getBlockNoCreate(blockpos);
1214         assert(block != NULL);
1215         modified_blocks[blockpos] = block;
1216
1217         /*
1218                 If the removed node was under sunlight, propagate the
1219                 sunlight down from it and then light all neighbors
1220                 of the propagated blocks.
1221         */
1222         if(node_under_sunlight)
1223         {
1224                 s16 ybottom = propagateSunlight(p, modified_blocks);
1225                 /*m_dout<<DTIME<<"Node was under sunlight. "
1226                                 "Propagating sunlight";
1227                 m_dout<<DTIME<<" -> ybottom="<<ybottom<<std::endl;*/
1228                 s16 y = p.Y;
1229                 for(; y >= ybottom; y--)
1230                 {
1231                         v3s16 p2(p.X, y, p.Z);
1232                         /*m_dout<<DTIME<<"lighting neighbors of node ("
1233                                         <<p2.X<<","<<p2.Y<<","<<p2.Z<<")"
1234                                         <<std::endl;*/
1235                         lightNeighbors(LIGHTBANK_DAY, p2, modified_blocks);
1236                 }
1237         }
1238         else
1239         {
1240                 // Set the lighting of this node to 0
1241                 // TODO: Is this needed? Lighting is cleared up there already.
1242                 try{
1243                         MapNode n = getNode(p);
1244                         n.setLight(LIGHTBANK_DAY, 0, ndef);
1245                         setNode(p, n);
1246                 }
1247                 catch(InvalidPositionException &e)
1248                 {
1249                         assert(0);
1250                 }
1251         }
1252
1253         for(s32 i=0; i<2; i++)
1254         {
1255                 enum LightBank bank = banks[i];
1256
1257                 // Get the brightest neighbour node and propagate light from it
1258                 v3s16 n2p = getBrightestNeighbour(bank, p);
1259                 try{
1260                         //MapNode n2 = getNode(n2p);
1261                         lightNeighbors(bank, n2p, modified_blocks);
1262                 }
1263                 catch(InvalidPositionException &e)
1264                 {
1265                 }
1266         }
1267
1268         /*
1269                 Update information about whether day and night light differ
1270         */
1271         for(std::map<v3s16, MapBlock*>::iterator
1272                         i = modified_blocks.begin();
1273                         i != modified_blocks.end(); ++i)
1274         {
1275                 i->second->expireDayNightDiff();
1276         }
1277
1278         /*
1279                 Report for rollback
1280         */
1281         if(m_gamedef->rollback())
1282         {
1283                 RollbackNode rollback_newnode(this, p, m_gamedef);
1284                 RollbackAction action;
1285                 action.setSetNode(p, rollback_oldnode, rollback_newnode);
1286                 m_gamedef->rollback()->reportAction(action);
1287         }
1288
1289         /*
1290                 Add neighboring liquid nodes and this node to transform queue.
1291                 (it's vital for the node itself to get updated last.)
1292                 note: todo: for liquid_finite enough to add only self node
1293         */
1294         v3s16 dirs[7] = {
1295                 v3s16(0,0,1), // back
1296                 v3s16(0,1,0), // top
1297                 v3s16(1,0,0), // right
1298                 v3s16(0,0,-1), // front
1299                 v3s16(0,-1,0), // bottom
1300                 v3s16(-1,0,0), // left
1301                 v3s16(0,0,0), // self
1302         };
1303         for(u16 i=0; i<7; i++)
1304         {
1305                 try
1306                 {
1307
1308                 v3s16 p2 = p + dirs[i];
1309
1310                 MapNode n2 = getNode(p2);
1311                 if(ndef->get(n2).isLiquid() || n2.getContent() == CONTENT_AIR)
1312                 {
1313                         m_transforming_liquid.push_back(p2);
1314                 }
1315
1316                 }catch(InvalidPositionException &e)
1317                 {
1318                 }
1319         }
1320 }
1321
1322 bool Map::addNodeWithEvent(v3s16 p, MapNode n, bool remove_metadata)
1323 {
1324         MapEditEvent event;
1325         event.type = remove_metadata ? MEET_ADDNODE : MEET_SWAPNODE;
1326         event.p = p;
1327         event.n = n;
1328
1329         bool succeeded = true;
1330         try{
1331                 std::map<v3s16, MapBlock*> modified_blocks;
1332                 addNodeAndUpdate(p, n, modified_blocks, remove_metadata);
1333
1334                 // Copy modified_blocks to event
1335                 for(std::map<v3s16, MapBlock*>::iterator
1336                                 i = modified_blocks.begin();
1337                                 i != modified_blocks.end(); ++i)
1338                 {
1339                         event.modified_blocks.insert(i->first);
1340                 }
1341         }
1342         catch(InvalidPositionException &e){
1343                 succeeded = false;
1344         }
1345
1346         dispatchEvent(&event);
1347
1348         return succeeded;
1349 }
1350
1351 bool Map::removeNodeWithEvent(v3s16 p)
1352 {
1353         MapEditEvent event;
1354         event.type = MEET_REMOVENODE;
1355         event.p = p;
1356
1357         bool succeeded = true;
1358         try{
1359                 std::map<v3s16, MapBlock*> modified_blocks;
1360                 removeNodeAndUpdate(p, modified_blocks);
1361
1362                 // Copy modified_blocks to event
1363                 for(std::map<v3s16, MapBlock*>::iterator
1364                                 i = modified_blocks.begin();
1365                                 i != modified_blocks.end(); ++i)
1366                 {
1367                         event.modified_blocks.insert(i->first);
1368                 }
1369         }
1370         catch(InvalidPositionException &e){
1371                 succeeded = false;
1372         }
1373
1374         dispatchEvent(&event);
1375
1376         return succeeded;
1377 }
1378
1379 bool Map::getDayNightDiff(v3s16 blockpos)
1380 {
1381         try{
1382                 v3s16 p = blockpos + v3s16(0,0,0);
1383                 MapBlock *b = getBlockNoCreate(p);
1384                 if(b->getDayNightDiff())
1385                         return true;
1386         }
1387         catch(InvalidPositionException &e){}
1388         // Leading edges
1389         try{
1390                 v3s16 p = blockpos + v3s16(-1,0,0);
1391                 MapBlock *b = getBlockNoCreate(p);
1392                 if(b->getDayNightDiff())
1393                         return true;
1394         }
1395         catch(InvalidPositionException &e){}
1396         try{
1397                 v3s16 p = blockpos + v3s16(0,-1,0);
1398                 MapBlock *b = getBlockNoCreate(p);
1399                 if(b->getDayNightDiff())
1400                         return true;
1401         }
1402         catch(InvalidPositionException &e){}
1403         try{
1404                 v3s16 p = blockpos + v3s16(0,0,-1);
1405                 MapBlock *b = getBlockNoCreate(p);
1406                 if(b->getDayNightDiff())
1407                         return true;
1408         }
1409         catch(InvalidPositionException &e){}
1410         // Trailing edges
1411         try{
1412                 v3s16 p = blockpos + v3s16(1,0,0);
1413                 MapBlock *b = getBlockNoCreate(p);
1414                 if(b->getDayNightDiff())
1415                         return true;
1416         }
1417         catch(InvalidPositionException &e){}
1418         try{
1419                 v3s16 p = blockpos + v3s16(0,1,0);
1420                 MapBlock *b = getBlockNoCreate(p);
1421                 if(b->getDayNightDiff())
1422                         return true;
1423         }
1424         catch(InvalidPositionException &e){}
1425         try{
1426                 v3s16 p = blockpos + v3s16(0,0,1);
1427                 MapBlock *b = getBlockNoCreate(p);
1428                 if(b->getDayNightDiff())
1429                         return true;
1430         }
1431         catch(InvalidPositionException &e){}
1432
1433         return false;
1434 }
1435
1436 /*
1437         Updates usage timers
1438 */
1439 void Map::timerUpdate(float dtime, float unload_timeout,
1440                 std::list<v3s16> *unloaded_blocks)
1441 {
1442         bool save_before_unloading = (mapType() == MAPTYPE_SERVER);
1443
1444         // Profile modified reasons
1445         Profiler modprofiler;
1446
1447         std::list<v2s16> sector_deletion_queue;
1448         u32 deleted_blocks_count = 0;
1449         u32 saved_blocks_count = 0;
1450         u32 block_count_all = 0;
1451
1452         beginSave();
1453         for(std::map<v2s16, MapSector*>::iterator si = m_sectors.begin();
1454                 si != m_sectors.end(); ++si)
1455         {
1456                 MapSector *sector = si->second;
1457
1458                 bool all_blocks_deleted = true;
1459
1460                 std::list<MapBlock*> blocks;
1461                 sector->getBlocks(blocks);
1462
1463                 for(std::list<MapBlock*>::iterator i = blocks.begin();
1464                                 i != blocks.end(); ++i)
1465                 {
1466                         MapBlock *block = (*i);
1467
1468                         block->incrementUsageTimer(dtime);
1469
1470                         if(block->refGet() == 0 && block->getUsageTimer() > unload_timeout)
1471                         {
1472                                 v3s16 p = block->getPos();
1473
1474                                 // Save if modified
1475                                 if(block->getModified() != MOD_STATE_CLEAN
1476                                                 && save_before_unloading)
1477                                 {
1478                                         modprofiler.add(block->getModifiedReason(), 1);
1479                                         saveBlock(block);
1480                                         saved_blocks_count++;
1481                                 }
1482
1483                                 // Delete from memory
1484                                 sector->deleteBlock(block);
1485
1486                                 if(unloaded_blocks)
1487                                         unloaded_blocks->push_back(p);
1488
1489                                 deleted_blocks_count++;
1490                         }
1491                         else
1492                         {
1493                                 all_blocks_deleted = false;
1494                                 block_count_all++;
1495                         }
1496                 }
1497
1498                 if(all_blocks_deleted)
1499                 {
1500                         sector_deletion_queue.push_back(si->first);
1501                 }
1502         }
1503         endSave();
1504
1505         // Finally delete the empty sectors
1506         deleteSectors(sector_deletion_queue);
1507
1508         if(deleted_blocks_count != 0)
1509         {
1510                 PrintInfo(infostream); // ServerMap/ClientMap:
1511                 infostream<<"Unloaded "<<deleted_blocks_count
1512                                 <<" blocks from memory";
1513                 if(save_before_unloading)
1514                         infostream<<", of which "<<saved_blocks_count<<" were written";
1515                 infostream<<", "<<block_count_all<<" blocks in memory";
1516                 infostream<<"."<<std::endl;
1517                 if(saved_blocks_count != 0){
1518                         PrintInfo(infostream); // ServerMap/ClientMap:
1519                         infostream<<"Blocks modified by: "<<std::endl;
1520                         modprofiler.print(infostream);
1521                 }
1522         }
1523 }
1524
1525 void Map::unloadUnreferencedBlocks(std::list<v3s16> *unloaded_blocks)
1526 {
1527         timerUpdate(0.0, -1.0, unloaded_blocks);
1528 }
1529
1530 void Map::deleteSectors(std::list<v2s16> &list)
1531 {
1532         for(std::list<v2s16>::iterator j = list.begin();
1533                 j != list.end(); ++j)
1534         {
1535                 MapSector *sector = m_sectors[*j];
1536                 // If sector is in sector cache, remove it from there
1537                 if(m_sector_cache == sector)
1538                         m_sector_cache = NULL;
1539                 // Remove from map and delete
1540                 m_sectors.erase(*j);
1541                 delete sector;
1542         }
1543 }
1544
1545 #if 0
1546 void Map::unloadUnusedData(float timeout,
1547                 core::list<v3s16> *deleted_blocks)
1548 {
1549         core::list<v2s16> sector_deletion_queue;
1550         u32 deleted_blocks_count = 0;
1551         u32 saved_blocks_count = 0;
1552
1553         core::map<v2s16, MapSector*>::Iterator si = m_sectors.getIterator();
1554         for(; si.atEnd() == false; si++)
1555         {
1556                 MapSector *sector = si.getNode()->getValue();
1557
1558                 bool all_blocks_deleted = true;
1559
1560                 core::list<MapBlock*> blocks;
1561                 sector->getBlocks(blocks);
1562                 for(core::list<MapBlock*>::Iterator i = blocks.begin();
1563                                 i != blocks.end(); i++)
1564                 {
1565                         MapBlock *block = (*i);
1566
1567                         if(block->getUsageTimer() > timeout)
1568                         {
1569                                 // Save if modified
1570                                 if(block->getModified() != MOD_STATE_CLEAN)
1571                                 {
1572                                         saveBlock(block);
1573                                         saved_blocks_count++;
1574                                 }
1575                                 // Delete from memory
1576                                 sector->deleteBlock(block);
1577                                 deleted_blocks_count++;
1578                         }
1579                         else
1580                         {
1581                                 all_blocks_deleted = false;
1582                         }
1583                 }
1584
1585                 if(all_blocks_deleted)
1586                 {
1587                         sector_deletion_queue.push_back(si.getNode()->getKey());
1588                 }
1589         }
1590
1591         deleteSectors(sector_deletion_queue);
1592
1593         infostream<<"Map: Unloaded "<<deleted_blocks_count<<" blocks from memory"
1594                         <<", of which "<<saved_blocks_count<<" were wr."
1595                         <<std::endl;
1596
1597         //return sector_deletion_queue.getSize();
1598         //return deleted_blocks_count;
1599 }
1600 #endif
1601
1602 void Map::PrintInfo(std::ostream &out)
1603 {
1604         out<<"Map: ";
1605 }
1606
1607 #define WATER_DROP_BOOST 4
1608
1609 enum NeighborType {
1610         NEIGHBOR_UPPER,
1611         NEIGHBOR_SAME_LEVEL,
1612         NEIGHBOR_LOWER
1613 };
1614 struct NodeNeighbor {
1615         MapNode n;
1616         NeighborType t;
1617         v3s16 p;
1618         bool l; //can liquid
1619         bool i; //infinity
1620 };
1621
1622 void Map::transforming_liquid_add(v3s16 p) {
1623         m_transforming_liquid.push_back(p);
1624 }
1625
1626 s32 Map::transforming_liquid_size() {
1627         return m_transforming_liquid.size();
1628 }
1629
1630 const v3s16 g_7dirs[7] =
1631 {
1632         // +right, +top, +back
1633         v3s16( 0,-1, 0), // bottom
1634         v3s16( 0, 0, 0), // self
1635         v3s16( 0, 0, 1), // back
1636         v3s16( 0, 0,-1), // front
1637         v3s16( 1, 0, 0), // right
1638         v3s16(-1, 0, 0), // left
1639         v3s16( 0, 1, 0)  // top
1640 };
1641
1642 #define D_BOTTOM 0
1643 #define D_TOP 6
1644 #define D_SELF 1
1645
1646 void Map::transformLiquidsFinite(std::map<v3s16, MapBlock*> & modified_blocks)
1647 {
1648         INodeDefManager *nodemgr = m_gamedef->ndef();
1649
1650         DSTACK(__FUNCTION_NAME);
1651         //TimeTaker timer("transformLiquids()");
1652
1653         u32 loopcount = 0;
1654         u32 initial_size = m_transforming_liquid.size();
1655
1656         u8 relax = g_settings->getS16("liquid_relax");
1657         bool fast_flood = g_settings->getS16("liquid_fast_flood");
1658         int water_level = g_settings->getS16("water_level");
1659
1660         // list of nodes that due to viscosity have not reached their max level height
1661         UniqueQueue<v3s16> must_reflow, must_reflow_second;
1662
1663         // List of MapBlocks that will require a lighting update (due to lava)
1664         std::map<v3s16, MapBlock*> lighting_modified_blocks;
1665
1666         u16 loop_max = g_settings->getU16("liquid_loop_max");
1667
1668         //if (m_transforming_liquid.size() > 0) errorstream << "Liquid queue size="<<m_transforming_liquid.size()<<std::endl;
1669
1670         while (m_transforming_liquid.size() > 0)
1671         {
1672                 // This should be done here so that it is done when continue is used
1673                 if (loopcount >= initial_size || loopcount >= loop_max)
1674                         break;
1675                 loopcount++;
1676                 /*
1677                         Get a queued transforming liquid node
1678                 */
1679                 v3s16 p0 = m_transforming_liquid.pop_front();
1680                 u16 total_level = 0;
1681                 // surrounding flowing liquid nodes
1682                 NodeNeighbor neighbors[7];
1683                 // current level of every block
1684                 s8 liquid_levels[7] = {-1, -1, -1, -1, -1, -1, -1};
1685                  // target levels
1686                 s8 liquid_levels_want[7] = {-1, -1, -1, -1, -1, -1, -1};
1687                 s8 can_liquid_same_level = 0;
1688                 content_t liquid_kind = CONTENT_IGNORE;
1689                 content_t liquid_kind_flowing = CONTENT_IGNORE;
1690                 /*
1691                         Collect information about the environment
1692                  */
1693                 const v3s16 *dirs = g_7dirs;
1694                 for (u16 i = 0; i < 7; i++) {
1695                         NeighborType nt = NEIGHBOR_SAME_LEVEL;
1696                         switch (i) {
1697                                 case D_TOP:
1698                                         nt = NEIGHBOR_UPPER;
1699                                         break;
1700                                 case D_BOTTOM:
1701                                         nt = NEIGHBOR_LOWER;
1702                                         break;
1703                         }
1704                         v3s16 npos = p0 + dirs[i];
1705
1706                         neighbors[i].n = getNodeNoEx(npos);
1707                         neighbors[i].t = nt;
1708                         neighbors[i].p = npos;
1709                         neighbors[i].l = 0;
1710                         neighbors[i].i = 0;
1711                         NodeNeighbor & nb = neighbors[i];
1712
1713                         switch (nodemgr->get(nb.n.getContent()).liquid_type) {
1714                                 case LIQUID_NONE:
1715                                         if (nb.n.getContent() == CONTENT_AIR) {
1716                                                 liquid_levels[i] = 0;
1717                                                 nb.l = 1;
1718                                         }
1719                                         break;
1720                                 case LIQUID_SOURCE:
1721                                         // if this node is not (yet) of a liquid type,
1722                                         // choose the first liquid type we encounter
1723                                         if (liquid_kind_flowing == CONTENT_IGNORE)
1724                                                 liquid_kind_flowing = nodemgr->getId(
1725                                                         nodemgr->get(nb.n).liquid_alternative_flowing);
1726                                         if (liquid_kind == CONTENT_IGNORE)
1727                                                 liquid_kind = nb.n.getContent();
1728                                         if (nb.n.getContent() == liquid_kind) {
1729                                                 liquid_levels[i] = nb.n.getLevel(nodemgr); //LIQUID_LEVEL_SOURCE;
1730                                                 nb.l = 1;
1731                                                 nb.i = (nb.n.param2 & LIQUID_INFINITY_MASK);
1732                                         }
1733                                         break;
1734                                 case LIQUID_FLOWING:
1735                                         // if this node is not (yet) of a liquid type,
1736                                         // choose the first liquid type we encounter
1737                                         if (liquid_kind_flowing == CONTENT_IGNORE)
1738                                                 liquid_kind_flowing = nb.n.getContent();
1739                                         if (liquid_kind == CONTENT_IGNORE)
1740                                                 liquid_kind = nodemgr->getId(
1741                                                         nodemgr->get(nb.n).liquid_alternative_source);
1742                                         if (nb.n.getContent() == liquid_kind_flowing) {
1743                                                 liquid_levels[i] = nb.n.getLevel(nodemgr); //(nb.n.param2 & LIQUID_LEVEL_MASK);
1744                                                 nb.l = 1;
1745                                         }
1746                                         break;
1747                         }
1748
1749                         if (nb.l && nb.t == NEIGHBOR_SAME_LEVEL)
1750                                 ++can_liquid_same_level;
1751                         if (liquid_levels[i] > 0)
1752                                 total_level += liquid_levels[i];
1753
1754                         /*
1755                         infostream << "get node i=" <<(int)i<<" " << PP(npos) << " c="
1756                         << nb.n.getContent() <<" p0="<< (int)nb.n.param0 <<" p1="
1757                         << (int)nb.n.param1 <<" p2="<< (int)nb.n.param2 << " lt="
1758                         << nodemgr->get(nb.n.getContent()).liquid_type
1759                         //<< " lk=" << liquid_kind << " lkf=" << liquid_kind_flowing
1760                         << " l="<< nb.l << " inf="<< nb.i << " nlevel=" << (int)liquid_levels[i]
1761                         << " tlevel=" << (int)total_level << " cansame="
1762                         << (int)can_liquid_same_level << std::endl;
1763                         */
1764                 }
1765
1766                 if (liquid_kind == CONTENT_IGNORE ||
1767                         !neighbors[D_SELF].l ||
1768                         total_level <= 0)
1769                         continue;
1770
1771                 // fill bottom block
1772                 if (neighbors[D_BOTTOM].l) {
1773                         liquid_levels_want[D_BOTTOM] = total_level > LIQUID_LEVEL_SOURCE ?
1774                                 LIQUID_LEVEL_SOURCE : total_level;
1775                         total_level -= liquid_levels_want[D_BOTTOM];
1776                 }
1777
1778                 //relax up
1779                 if (relax && ((p0.Y == water_level) || (fast_flood && p0.Y <= water_level)) && liquid_levels[D_TOP] == 0 &&
1780                         liquid_levels[D_BOTTOM] == LIQUID_LEVEL_SOURCE &&
1781                         total_level >= LIQUID_LEVEL_SOURCE * can_liquid_same_level-
1782                         (can_liquid_same_level - relax) &&
1783                         can_liquid_same_level >= relax + 1) {
1784                         total_level = LIQUID_LEVEL_SOURCE * can_liquid_same_level;
1785                 }
1786
1787                 // prevent lakes in air above unloaded blocks
1788                 if (liquid_levels[D_TOP] == 0 && (p0.Y > water_level) && neighbors[D_BOTTOM].n.getContent() == CONTENT_IGNORE && !(loopcount % 3)) {
1789                         --total_level;
1790                 }
1791
1792                 // calculate self level 5 blocks
1793                 u8 want_level =
1794                           total_level >= LIQUID_LEVEL_SOURCE * can_liquid_same_level
1795                         ? LIQUID_LEVEL_SOURCE
1796                         : total_level / can_liquid_same_level;
1797                 total_level -= want_level * can_liquid_same_level;
1798
1799                 //relax down
1800                 if (relax && p0.Y == water_level + 1 && liquid_levels[D_TOP] == 0 &&
1801                         liquid_levels[D_BOTTOM] == LIQUID_LEVEL_SOURCE && want_level == 0 &&
1802                         total_level <= (can_liquid_same_level - relax) &&
1803                         can_liquid_same_level >= relax + 1) {
1804                         total_level = 0;
1805                 }
1806
1807                 for (u16 ii = D_SELF; ii < D_TOP; ++ii) { // fill only same level
1808                         if (!neighbors[ii].l)
1809                                 continue;
1810                         liquid_levels_want[ii] = want_level;
1811                         if (liquid_levels_want[ii] < LIQUID_LEVEL_SOURCE && total_level > 0) {
1812                                 if (loopcount % 3 || liquid_levels[ii] <= 0){
1813                                         if (liquid_levels[ii] > liquid_levels_want[ii]) {
1814                                                 ++liquid_levels_want[ii];
1815                                                 --total_level;
1816                                         }
1817                                 } else if (neighbors[ii].l > 0){
1818                                                 ++liquid_levels_want[ii];
1819                                                 --total_level;
1820                                 }
1821                         }
1822                 }
1823
1824                 for (u16 ii = 0; ii < 7; ++ii) {
1825                         if (total_level < 1) break;
1826                         if (liquid_levels_want[ii] >= 0 &&
1827                                 liquid_levels_want[ii] < LIQUID_LEVEL_SOURCE) {
1828                                 ++liquid_levels_want[ii];
1829                                 --total_level;
1830                         }
1831                 }
1832
1833                 // fill top block if can
1834                 if (neighbors[D_TOP].l) {
1835                         liquid_levels_want[D_TOP] = total_level > LIQUID_LEVEL_SOURCE ?
1836                                 LIQUID_LEVEL_SOURCE : total_level;
1837                         total_level -= liquid_levels_want[D_TOP];
1838                 }
1839
1840                 for (u16 ii = 0; ii < 7; ii++) // infinity and cave flood optimization
1841                         if (    neighbors[ii].i ||
1842                                 (liquid_levels_want[ii] >= 0 &&
1843                                  (fast_flood && p0.Y < water_level &&
1844                                   (initial_size >= 1000
1845                                    && ii != D_TOP
1846                                    && want_level >= LIQUID_LEVEL_SOURCE/4
1847                                    && can_liquid_same_level >= 5
1848                                    && liquid_levels[D_TOP] >= LIQUID_LEVEL_SOURCE))))
1849                                 liquid_levels_want[ii] = LIQUID_LEVEL_SOURCE;
1850
1851                 /*
1852                 if (total_level > 0) //|| flowed != volume)
1853                         infostream <<" AFTER level=" << (int)total_level
1854                         //<< " flowed="<<flowed<< " volume=" << volume
1855                         << " wantsame="<<(int)want_level<< " top="
1856                         << (int)liquid_levels_want[D_TOP]<< " topwas="
1857                         << (int)liquid_levels[D_TOP]<< " bot="
1858                         << (int)liquid_levels_want[D_BOTTOM]<<std::endl;
1859                 */
1860
1861                 //u8 changed = 0;
1862                 for (u16 i = 0; i < 7; i++) {
1863                         if (liquid_levels_want[i] < 0 || !neighbors[i].l)
1864                                 continue;
1865                         MapNode & n0 = neighbors[i].n;
1866                         p0 = neighbors[i].p;
1867                         /*
1868                                 decide on the type (and possibly level) of the current node
1869                         */
1870                         content_t new_node_content;
1871                         s8 new_node_level = -1;
1872                         u8 viscosity = nodemgr->get(liquid_kind).liquid_viscosity;
1873                         if (viscosity > 1 && liquid_levels_want[i] != liquid_levels[i]) {
1874                                 // amount to gain, limited by viscosity
1875                                 // must be at least 1 in absolute value
1876                                 s8 level_inc = liquid_levels_want[i] - liquid_levels[i];
1877                                 if (level_inc < -viscosity || level_inc > viscosity)
1878                                         new_node_level = liquid_levels[i] + level_inc/viscosity;
1879                                 else if (level_inc < 0)
1880                                         new_node_level = liquid_levels[i] - 1;
1881                                 else if (level_inc > 0)
1882                                         new_node_level = liquid_levels[i] + 1;
1883                         } else {
1884                                 new_node_level = liquid_levels_want[i];
1885                         }
1886
1887                         if (new_node_level >= LIQUID_LEVEL_SOURCE)
1888                                 new_node_content = liquid_kind;
1889                         else if (new_node_level > 0)
1890                                 new_node_content = liquid_kind_flowing;
1891                         else
1892                                 new_node_content = CONTENT_AIR;
1893
1894                         // last level must flow down on stairs
1895                         if (liquid_levels_want[i] != liquid_levels[i] &&
1896                                 liquid_levels[D_TOP] <= 0 && !neighbors[D_BOTTOM].l &&
1897                                 new_node_level >= 1 && new_node_level <= 2) {
1898                                 for (u16 ii = D_SELF + 1; ii < D_TOP; ++ii) { // only same level
1899                                         if (neighbors[ii].l)
1900                                                 must_reflow_second.push_back(p0 + dirs[ii]);
1901                                 }
1902                         }
1903
1904                         /*
1905                                 check if anything has changed.
1906                                 if not, just continue with the next node.
1907                          */
1908                         /*
1909                         if (
1910                                  new_node_content == n0.getContent()
1911                                 && (nodemgr->get(n0.getContent()).liquid_type != LIQUID_FLOWING ||
1912                                  (n0.getLevel(nodemgr) == (u8)new_node_level
1913                                  //&& ((n0.param2 & LIQUID_FLOW_DOWN_MASK) ==
1914                                  //LIQUID_FLOW_DOWN_MASK) == flowing_down
1915                                  ))
1916                                 &&
1917                                  (nodemgr->get(n0.getContent()).liquid_type != LIQUID_SOURCE ||
1918                                  (((n0.param2 & LIQUID_INFINITY_MASK) ==
1919                                         LIQUID_INFINITY_MASK) == neighbors[i].i
1920                                  ))
1921                            )*/
1922                         if (liquid_levels[i] == new_node_level)
1923                         {
1924                                 continue;
1925                         }
1926
1927                         //++changed;
1928
1929                         /*
1930                                 update the current node
1931                          */
1932                         /*
1933                         if (nodemgr->get(new_node_content).liquid_type == LIQUID_FLOWING) {
1934                                 // set level to last 3 bits, flowing down bit to 4th bit
1935                                 n0.param2 = (new_node_level & LIQUID_LEVEL_MASK);
1936                         } else if (nodemgr->get(new_node_content).liquid_type == LIQUID_SOURCE) {
1937                                 //n0.param2 = ~(LIQUID_LEVEL_MASK | LIQUID_FLOW_DOWN_MASK);
1938                                 n0.param2 = (neighbors[i].i ? LIQUID_INFINITY_MASK : 0x00);
1939                         }
1940                         */
1941                         /*
1942                         infostream << "set node i=" <<(int)i<<" "<< PP(p0)<< " nc="
1943                         <<new_node_content<< " p2="<<(int)n0.param2<< " nl="
1944                         <<(int)new_node_level<<std::endl;
1945                         */
1946
1947                         n0.setContent(liquid_kind_flowing);
1948                         n0.setLevel(nodemgr, new_node_level);
1949                         // Find out whether there is a suspect for this action
1950                         std::string suspect;
1951                         if(m_gamedef->rollback()){
1952                                 suspect = m_gamedef->rollback()->getSuspect(p0, 83, 1);
1953                         }
1954
1955                         if(!suspect.empty()){
1956                                 // Blame suspect
1957                                 RollbackScopeActor rollback_scope(m_gamedef->rollback(), suspect, true);
1958                                 // Get old node for rollback
1959                                 RollbackNode rollback_oldnode(this, p0, m_gamedef);
1960                                 // Set node
1961                                 setNode(p0, n0);
1962                                 // Report
1963                                 RollbackNode rollback_newnode(this, p0, m_gamedef);
1964                                 RollbackAction action;
1965                                 action.setSetNode(p0, rollback_oldnode, rollback_newnode);
1966                                 m_gamedef->rollback()->reportAction(action);
1967                         } else {
1968                                 // Set node
1969                                 setNode(p0, n0);
1970                         }
1971
1972                         v3s16 blockpos = getNodeBlockPos(p0);
1973                         MapBlock *block = getBlockNoCreateNoEx(blockpos);
1974                         if(block != NULL) {
1975                                 modified_blocks[blockpos] = block;
1976                                 // If node emits light, MapBlock requires lighting update
1977                                 if(nodemgr->get(n0).light_source != 0)
1978                                         lighting_modified_blocks[block->getPos()] = block;
1979                         }
1980                         must_reflow.push_back(neighbors[i].p);
1981                 }
1982                 /* //for better relax  only same level
1983                 if (changed)  for (u16 ii = D_SELF + 1; ii < D_TOP; ++ii) {
1984                         if (!neighbors[ii].l) continue;
1985                         must_reflow.push_back(p0 + dirs[ii]);
1986                 }*/
1987         }
1988         /*
1989         if (loopcount)
1990                 infostream<<"Map::transformLiquids(): loopcount="<<loopcount
1991                 <<" reflow="<<must_reflow.size()
1992                 <<" queue="<< m_transforming_liquid.size()<<std::endl;
1993         */
1994         while (must_reflow.size() > 0)
1995                 m_transforming_liquid.push_back(must_reflow.pop_front());
1996         while (must_reflow_second.size() > 0)
1997                 m_transforming_liquid.push_back(must_reflow_second.pop_front());
1998         updateLighting(lighting_modified_blocks, modified_blocks);
1999 }
2000
2001 void Map::transformLiquids(std::map<v3s16, MapBlock*> & modified_blocks)
2002 {
2003
2004         if (g_settings->getBool("liquid_finite"))
2005                 return Map::transformLiquidsFinite(modified_blocks);
2006
2007         INodeDefManager *nodemgr = m_gamedef->ndef();
2008
2009         DSTACK(__FUNCTION_NAME);
2010         //TimeTaker timer("transformLiquids()");
2011
2012         u32 loopcount = 0;
2013         u32 initial_size = m_transforming_liquid.size();
2014
2015         /*if(initial_size != 0)
2016                 infostream<<"transformLiquids(): initial_size="<<initial_size<<std::endl;*/
2017
2018         // list of nodes that due to viscosity have not reached their max level height
2019         UniqueQueue<v3s16> must_reflow;
2020
2021         // List of MapBlocks that will require a lighting update (due to lava)
2022         std::map<v3s16, MapBlock*> lighting_modified_blocks;
2023
2024         u16 loop_max = g_settings->getU16("liquid_loop_max");
2025
2026         while(m_transforming_liquid.size() != 0)
2027         {
2028                 // This should be done here so that it is done when continue is used
2029                 if(loopcount >= initial_size || loopcount >= loop_max)
2030                         break;
2031                 loopcount++;
2032
2033                 /*
2034                         Get a queued transforming liquid node
2035                 */
2036                 v3s16 p0 = m_transforming_liquid.pop_front();
2037
2038                 MapNode n0 = getNodeNoEx(p0);
2039
2040                 /*
2041                         Collect information about current node
2042                  */
2043                 s8 liquid_level = -1;
2044                 content_t liquid_kind = CONTENT_IGNORE;
2045                 LiquidType liquid_type = nodemgr->get(n0).liquid_type;
2046                 switch (liquid_type) {
2047                         case LIQUID_SOURCE:
2048                                 liquid_level = LIQUID_LEVEL_SOURCE;
2049                                 liquid_kind = nodemgr->getId(nodemgr->get(n0).liquid_alternative_flowing);
2050                                 break;
2051                         case LIQUID_FLOWING:
2052                                 liquid_level = (n0.param2 & LIQUID_LEVEL_MASK);
2053                                 liquid_kind = n0.getContent();
2054                                 break;
2055                         case LIQUID_NONE:
2056                                 // if this is an air node, it *could* be transformed into a liquid. otherwise,
2057                                 // continue with the next node.
2058                                 if (n0.getContent() != CONTENT_AIR)
2059                                         continue;
2060                                 liquid_kind = CONTENT_AIR;
2061                                 break;
2062                 }
2063
2064                 /*
2065                         Collect information about the environment
2066                  */
2067                 const v3s16 *dirs = g_6dirs;
2068                 NodeNeighbor sources[6]; // surrounding sources
2069                 int num_sources = 0;
2070                 NodeNeighbor flows[6]; // surrounding flowing liquid nodes
2071                 int num_flows = 0;
2072                 NodeNeighbor airs[6]; // surrounding air
2073                 int num_airs = 0;
2074                 NodeNeighbor neutrals[6]; // nodes that are solid or another kind of liquid
2075                 int num_neutrals = 0;
2076                 bool flowing_down = false;
2077                 for (u16 i = 0; i < 6; i++) {
2078                         NeighborType nt = NEIGHBOR_SAME_LEVEL;
2079                         switch (i) {
2080                                 case 1:
2081                                         nt = NEIGHBOR_UPPER;
2082                                         break;
2083                                 case 4:
2084                                         nt = NEIGHBOR_LOWER;
2085                                         break;
2086                         }
2087                         v3s16 npos = p0 + dirs[i];
2088                         NodeNeighbor nb = {getNodeNoEx(npos), nt, npos};
2089                         switch (nodemgr->get(nb.n.getContent()).liquid_type) {
2090                                 case LIQUID_NONE:
2091                                         if (nb.n.getContent() == CONTENT_AIR) {
2092                                                 airs[num_airs++] = nb;
2093                                                 // if the current node is a water source the neighbor
2094                                                 // should be enqueded for transformation regardless of whether the
2095                                                 // current node changes or not.
2096                                                 if (nb.t != NEIGHBOR_UPPER && liquid_type != LIQUID_NONE)
2097                                                         m_transforming_liquid.push_back(npos);
2098                                                 // if the current node happens to be a flowing node, it will start to flow down here.
2099                                                 if (nb.t == NEIGHBOR_LOWER) {
2100                                                         flowing_down = true;
2101                                                 }
2102                                         } else {
2103                                                 neutrals[num_neutrals++] = nb;
2104                                         }
2105                                         break;
2106                                 case LIQUID_SOURCE:
2107                                         // if this node is not (yet) of a liquid type, choose the first liquid type we encounter
2108                                         if (liquid_kind == CONTENT_AIR)
2109                                                 liquid_kind = nodemgr->getId(nodemgr->get(nb.n).liquid_alternative_flowing);
2110                                         if (nodemgr->getId(nodemgr->get(nb.n).liquid_alternative_flowing) != liquid_kind) {
2111                                                 neutrals[num_neutrals++] = nb;
2112                                         } else {
2113                                                 // Do not count bottom source, it will screw things up
2114                                                 if(dirs[i].Y != -1)
2115                                                         sources[num_sources++] = nb;
2116                                         }
2117                                         break;
2118                                 case LIQUID_FLOWING:
2119                                         // if this node is not (yet) of a liquid type, choose the first liquid type we encounter
2120                                         if (liquid_kind == CONTENT_AIR)
2121                                                 liquid_kind = nodemgr->getId(nodemgr->get(nb.n).liquid_alternative_flowing);
2122                                         if (nodemgr->getId(nodemgr->get(nb.n).liquid_alternative_flowing) != liquid_kind) {
2123                                                 neutrals[num_neutrals++] = nb;
2124                                         } else {
2125                                                 flows[num_flows++] = nb;
2126                                                 if (nb.t == NEIGHBOR_LOWER)
2127                                                         flowing_down = true;
2128                                         }
2129                                         break;
2130                         }
2131                 }
2132
2133                 /*
2134                         decide on the type (and possibly level) of the current node
2135                  */
2136                 content_t new_node_content;
2137                 s8 new_node_level = -1;
2138                 s8 max_node_level = -1;
2139                 u8 range = rangelim(nodemgr->get(liquid_kind).liquid_range, 0, LIQUID_LEVEL_MAX+1);
2140                 if ((num_sources >= 2 && nodemgr->get(liquid_kind).liquid_renewable) || liquid_type == LIQUID_SOURCE) {
2141                         // liquid_kind will be set to either the flowing alternative of the node (if it's a liquid)
2142                         // or the flowing alternative of the first of the surrounding sources (if it's air), so
2143                         // it's perfectly safe to use liquid_kind here to determine the new node content.
2144                         new_node_content = nodemgr->getId(nodemgr->get(liquid_kind).liquid_alternative_source);
2145                 } else if (num_sources >= 1 && sources[0].t != NEIGHBOR_LOWER) {
2146                         // liquid_kind is set properly, see above
2147                         new_node_content = liquid_kind;
2148                         max_node_level = new_node_level = LIQUID_LEVEL_MAX;
2149                         if (new_node_level < (LIQUID_LEVEL_MAX+1-range))
2150                                 new_node_content = CONTENT_AIR;
2151                 } else {
2152                         // no surrounding sources, so get the maximum level that can flow into this node
2153                         for (u16 i = 0; i < num_flows; i++) {
2154                                 u8 nb_liquid_level = (flows[i].n.param2 & LIQUID_LEVEL_MASK);
2155                                 switch (flows[i].t) {
2156                                         case NEIGHBOR_UPPER:
2157                                                 if (nb_liquid_level + WATER_DROP_BOOST > max_node_level) {
2158                                                         max_node_level = LIQUID_LEVEL_MAX;
2159                                                         if (nb_liquid_level + WATER_DROP_BOOST < LIQUID_LEVEL_MAX)
2160                                                                 max_node_level = nb_liquid_level + WATER_DROP_BOOST;
2161                                                 } else if (nb_liquid_level > max_node_level)
2162                                                         max_node_level = nb_liquid_level;
2163                                                 break;
2164                                         case NEIGHBOR_LOWER:
2165                                                 break;
2166                                         case NEIGHBOR_SAME_LEVEL:
2167                                                 if ((flows[i].n.param2 & LIQUID_FLOW_DOWN_MASK) != LIQUID_FLOW_DOWN_MASK &&
2168                                                         nb_liquid_level > 0 && nb_liquid_level - 1 > max_node_level) {
2169                                                         max_node_level = nb_liquid_level - 1;
2170                                                 }
2171                                                 break;
2172                                 }
2173                         }
2174
2175                         u8 viscosity = nodemgr->get(liquid_kind).liquid_viscosity;
2176                         if (viscosity > 1 && max_node_level != liquid_level) {
2177                                 // amount to gain, limited by viscosity
2178                                 // must be at least 1 in absolute value
2179                                 s8 level_inc = max_node_level - liquid_level;
2180                                 if (level_inc < -viscosity || level_inc > viscosity)
2181                                         new_node_level = liquid_level + level_inc/viscosity;
2182                                 else if (level_inc < 0)
2183                                         new_node_level = liquid_level - 1;
2184                                 else if (level_inc > 0)
2185                                         new_node_level = liquid_level + 1;
2186                                 if (new_node_level != max_node_level)
2187                                         must_reflow.push_back(p0);
2188                         } else
2189                                 new_node_level = max_node_level;
2190
2191                         if (max_node_level >= (LIQUID_LEVEL_MAX+1-range))
2192                                 new_node_content = liquid_kind;
2193                         else
2194                                 new_node_content = CONTENT_AIR;
2195
2196                 }
2197
2198                 /*
2199                         check if anything has changed. if not, just continue with the next node.
2200                  */
2201                 if (new_node_content == n0.getContent() && (nodemgr->get(n0.getContent()).liquid_type != LIQUID_FLOWING ||
2202                                                                                  ((n0.param2 & LIQUID_LEVEL_MASK) == (u8)new_node_level &&
2203                                                                                  ((n0.param2 & LIQUID_FLOW_DOWN_MASK) == LIQUID_FLOW_DOWN_MASK)
2204                                                                                  == flowing_down)))
2205                         continue;
2206
2207
2208                 /*
2209                         update the current node
2210                  */
2211                 MapNode n00 = n0;
2212                 //bool flow_down_enabled = (flowing_down && ((n0.param2 & LIQUID_FLOW_DOWN_MASK) != LIQUID_FLOW_DOWN_MASK));
2213                 if (nodemgr->get(new_node_content).liquid_type == LIQUID_FLOWING) {
2214                         // set level to last 3 bits, flowing down bit to 4th bit
2215                         n0.param2 = (flowing_down ? LIQUID_FLOW_DOWN_MASK : 0x00) | (new_node_level & LIQUID_LEVEL_MASK);
2216                 } else {
2217                         // set the liquid level and flow bit to 0
2218                         n0.param2 = ~(LIQUID_LEVEL_MASK | LIQUID_FLOW_DOWN_MASK);
2219                 }
2220                 n0.setContent(new_node_content);
2221
2222                 // Find out whether there is a suspect for this action
2223                 std::string suspect;
2224                 if(m_gamedef->rollback()){
2225                         suspect = m_gamedef->rollback()->getSuspect(p0, 83, 1);
2226                 }
2227
2228                 if(!suspect.empty()){
2229                         // Blame suspect
2230                         RollbackScopeActor rollback_scope(m_gamedef->rollback(), suspect, true);
2231                         // Get old node for rollback
2232                         RollbackNode rollback_oldnode(this, p0, m_gamedef);
2233                         // Set node
2234                         setNode(p0, n0);
2235                         // Report
2236                         RollbackNode rollback_newnode(this, p0, m_gamedef);
2237                         RollbackAction action;
2238                         action.setSetNode(p0, rollback_oldnode, rollback_newnode);
2239                         m_gamedef->rollback()->reportAction(action);
2240                 } else {
2241                         // Set node
2242                         setNode(p0, n0);
2243                 }
2244
2245                 v3s16 blockpos = getNodeBlockPos(p0);
2246                 MapBlock *block = getBlockNoCreateNoEx(blockpos);
2247                 if(block != NULL) {
2248                         modified_blocks[blockpos] =  block;
2249                         // If new or old node emits light, MapBlock requires lighting update
2250                         if(nodemgr->get(n0).light_source != 0 ||
2251                                         nodemgr->get(n00).light_source != 0)
2252                                 lighting_modified_blocks[block->getPos()] = block;
2253                 }
2254
2255                 /*
2256                         enqueue neighbors for update if neccessary
2257                  */
2258                 switch (nodemgr->get(n0.getContent()).liquid_type) {
2259                         case LIQUID_SOURCE:
2260                         case LIQUID_FLOWING:
2261                                 // make sure source flows into all neighboring nodes
2262                                 for (u16 i = 0; i < num_flows; i++)
2263                                         if (flows[i].t != NEIGHBOR_UPPER)
2264                                                 m_transforming_liquid.push_back(flows[i].p);
2265                                 for (u16 i = 0; i < num_airs; i++)
2266                                         if (airs[i].t != NEIGHBOR_UPPER)
2267                                                 m_transforming_liquid.push_back(airs[i].p);
2268                                 break;
2269                         case LIQUID_NONE:
2270                                 // this flow has turned to air; neighboring flows might need to do the same
2271                                 for (u16 i = 0; i < num_flows; i++)
2272                                         m_transforming_liquid.push_back(flows[i].p);
2273                                 break;
2274                 }
2275         }
2276         //infostream<<"Map::transformLiquids(): loopcount="<<loopcount<<std::endl;
2277         while (must_reflow.size() > 0)
2278                 m_transforming_liquid.push_back(must_reflow.pop_front());
2279         updateLighting(lighting_modified_blocks, modified_blocks);
2280 }
2281
2282 NodeMetadata *Map::getNodeMetadata(v3s16 p)
2283 {
2284         v3s16 blockpos = getNodeBlockPos(p);
2285         v3s16 p_rel = p - blockpos*MAP_BLOCKSIZE;
2286         MapBlock *block = getBlockNoCreateNoEx(blockpos);
2287         if(!block){
2288                 infostream<<"Map::getNodeMetadata(): Need to emerge "
2289                                 <<PP(blockpos)<<std::endl;
2290                 block = emergeBlock(blockpos, false);
2291         }
2292         if(!block){
2293                 infostream<<"WARNING: Map::getNodeMetadata(): Block not found"
2294                                 <<std::endl;
2295                 return NULL;
2296         }
2297         NodeMetadata *meta = block->m_node_metadata.get(p_rel);
2298         return meta;
2299 }
2300
2301 bool Map::setNodeMetadata(v3s16 p, NodeMetadata *meta)
2302 {
2303         v3s16 blockpos = getNodeBlockPos(p);
2304         v3s16 p_rel = p - blockpos*MAP_BLOCKSIZE;
2305         MapBlock *block = getBlockNoCreateNoEx(blockpos);
2306         if(!block){
2307                 infostream<<"Map::setNodeMetadata(): Need to emerge "
2308                                 <<PP(blockpos)<<std::endl;
2309                 block = emergeBlock(blockpos, false);
2310         }
2311         if(!block){
2312                 infostream<<"WARNING: Map::setNodeMetadata(): Block not found"
2313                                 <<std::endl;
2314                 return false;
2315         }
2316         block->m_node_metadata.set(p_rel, meta);
2317         return true;
2318 }
2319
2320 void Map::removeNodeMetadata(v3s16 p)
2321 {
2322         v3s16 blockpos = getNodeBlockPos(p);
2323         v3s16 p_rel = p - blockpos*MAP_BLOCKSIZE;
2324         MapBlock *block = getBlockNoCreateNoEx(blockpos);
2325         if(block == NULL)
2326         {
2327                 infostream<<"WARNING: Map::removeNodeMetadata(): Block not found"
2328                                 <<std::endl;
2329                 return;
2330         }
2331         block->m_node_metadata.remove(p_rel);
2332 }
2333
2334 NodeTimer Map::getNodeTimer(v3s16 p)
2335 {
2336         v3s16 blockpos = getNodeBlockPos(p);
2337         v3s16 p_rel = p - blockpos*MAP_BLOCKSIZE;
2338         MapBlock *block = getBlockNoCreateNoEx(blockpos);
2339         if(!block){
2340                 infostream<<"Map::getNodeTimer(): Need to emerge "
2341                                 <<PP(blockpos)<<std::endl;
2342                 block = emergeBlock(blockpos, false);
2343         }
2344         if(!block){
2345                 infostream<<"WARNING: Map::getNodeTimer(): Block not found"
2346                                 <<std::endl;
2347                 return NodeTimer();
2348         }
2349         NodeTimer t = block->m_node_timers.get(p_rel);
2350         return t;
2351 }
2352
2353 void Map::setNodeTimer(v3s16 p, NodeTimer t)
2354 {
2355         v3s16 blockpos = getNodeBlockPos(p);
2356         v3s16 p_rel = p - blockpos*MAP_BLOCKSIZE;
2357         MapBlock *block = getBlockNoCreateNoEx(blockpos);
2358         if(!block){
2359                 infostream<<"Map::setNodeTimer(): Need to emerge "
2360                                 <<PP(blockpos)<<std::endl;
2361                 block = emergeBlock(blockpos, false);
2362         }
2363         if(!block){
2364                 infostream<<"WARNING: Map::setNodeTimer(): Block not found"
2365                                 <<std::endl;
2366                 return;
2367         }
2368         block->m_node_timers.set(p_rel, t);
2369 }
2370
2371 void Map::removeNodeTimer(v3s16 p)
2372 {
2373         v3s16 blockpos = getNodeBlockPos(p);
2374         v3s16 p_rel = p - blockpos*MAP_BLOCKSIZE;
2375         MapBlock *block = getBlockNoCreateNoEx(blockpos);
2376         if(block == NULL)
2377         {
2378                 infostream<<"WARNING: Map::removeNodeTimer(): Block not found"
2379                                 <<std::endl;
2380                 return;
2381         }
2382         block->m_node_timers.remove(p_rel);
2383 }
2384
2385 s16 Map::getHeat(v3s16 p)
2386 {
2387         MapBlock *block = getBlockNoCreateNoEx(getNodeBlockPos(p));
2388         if(block != NULL) {
2389                 return block->heat;
2390         }
2391         //errorstream << "No heat for " << p.X<<"," << p.Z << std::endl;
2392         return 0;
2393 }
2394
2395 s16 Map::getHumidity(v3s16 p)
2396 {
2397         MapBlock *block = getBlockNoCreateNoEx(getNodeBlockPos(p));
2398         if(block != NULL) {
2399                 return block->humidity;
2400         }
2401         //errorstream << "No humidity for " << p.X<<"," << p.Z << std::endl;
2402         return 0;
2403 }
2404
2405 /*
2406         ServerMap
2407 */
2408 ServerMap::ServerMap(std::string savedir, IGameDef *gamedef, EmergeManager *emerge):
2409         Map(dout_server, gamedef),
2410         m_seed(0),
2411         m_map_metadata_changed(true)
2412 {
2413         verbosestream<<__FUNCTION_NAME<<std::endl;
2414
2415         m_emerge = emerge;
2416         m_mgparams = m_emerge->getParamsFromSettings(g_settings);
2417         if (!m_mgparams)
2418                 m_mgparams = new MapgenV6Params();
2419
2420         m_seed = m_mgparams->seed;
2421
2422         if (g_settings->get("fixed_map_seed").empty())
2423         {
2424                 m_seed = (((u64)(myrand() & 0xffff) << 0)
2425                                 | ((u64)(myrand() & 0xffff) << 16)
2426                                 | ((u64)(myrand() & 0xffff) << 32)
2427                                 | ((u64)(myrand() & 0xffff) << 48));
2428                 m_mgparams->seed = m_seed;
2429         }
2430
2431         /*
2432                 Experimental and debug stuff
2433         */
2434
2435         {
2436         }
2437
2438         /*
2439                 Try to load map; if not found, create a new one.
2440         */
2441
2442         // Determine which database backend to use
2443         std::string conf_path = savedir + DIR_DELIM + "world.mt";
2444         Settings conf;
2445         bool succeeded = conf.readConfigFile(conf_path.c_str());
2446         if (!succeeded || !conf.exists("backend")) {
2447                 // fall back to sqlite3
2448                 dbase = new Database_SQLite3(this, savedir);
2449                 conf.set("backend", "sqlite3");
2450         } else {
2451                 std::string backend = conf.get("backend");
2452                 if (backend == "dummy")
2453                         dbase = new Database_Dummy(this);
2454                 else if (backend == "sqlite3")
2455                         dbase = new Database_SQLite3(this, savedir);
2456                 #if USE_LEVELDB
2457                 else if (backend == "leveldb")
2458                         dbase = new Database_LevelDB(this, savedir);
2459                 #endif
2460                 else
2461                         throw BaseException("Unknown map backend");
2462         }
2463
2464         m_savedir = savedir;
2465         m_map_saving_enabled = false;
2466
2467         try
2468         {
2469                 // If directory exists, check contents and load if possible
2470                 if(fs::PathExists(m_savedir))
2471                 {
2472                         // If directory is empty, it is safe to save into it.
2473                         if(fs::GetDirListing(m_savedir).size() == 0)
2474                         {
2475                                 infostream<<"ServerMap: Empty save directory is valid."
2476                                                 <<std::endl;
2477                                 m_map_saving_enabled = true;
2478                         }
2479                         else
2480                         {
2481                                 try{
2482                                         // Load map metadata (seed, chunksize)
2483                                         loadMapMeta();
2484                                 }
2485                                 catch(SettingNotFoundException &e){
2486                                         infostream<<"ServerMap:  Some metadata not found."
2487                                                           <<" Using default settings."<<std::endl;
2488                                 }
2489                                 catch(FileNotGoodException &e){
2490                                         infostream<<"WARNING: Could not load map metadata"
2491                                                         //<<" Disabling chunk-based generator."
2492                                                         <<std::endl;
2493                                         //m_chunksize = 0;
2494                                 }
2495
2496                                 infostream<<"ServerMap: Successfully loaded map "
2497                                                 <<"metadata from "<<savedir
2498                                                 <<", assuming valid save directory."
2499                                                 <<" seed="<<m_seed<<"."
2500                                                 <<std::endl;
2501
2502                                 m_map_saving_enabled = true;
2503                                 // Map loaded, not creating new one
2504                                 return;
2505                         }
2506                 }
2507                 // If directory doesn't exist, it is safe to save to it
2508                 else{
2509                         m_map_saving_enabled = true;
2510                 }
2511         }
2512         catch(std::exception &e)
2513         {
2514                 infostream<<"WARNING: ServerMap: Failed to load map from "<<savedir
2515                                 <<", exception: "<<e.what()<<std::endl;
2516                 infostream<<"Please remove the map or fix it."<<std::endl;
2517                 infostream<<"WARNING: Map saving will be disabled."<<std::endl;
2518         }
2519
2520         infostream<<"Initializing new map."<<std::endl;
2521
2522         // Create zero sector
2523         emergeSector(v2s16(0,0));
2524
2525         // Initially write whole map
2526         save(MOD_STATE_CLEAN);
2527 }
2528
2529 ServerMap::~ServerMap()
2530 {
2531         verbosestream<<__FUNCTION_NAME<<std::endl;
2532
2533         try
2534         {
2535                 if(m_map_saving_enabled)
2536                 {
2537                         // Save only changed parts
2538                         save(MOD_STATE_WRITE_AT_UNLOAD);
2539                         infostream<<"ServerMap: Saved map to "<<m_savedir<<std::endl;
2540                 }
2541                 else
2542                 {
2543                         infostream<<"ServerMap: Map not saved"<<std::endl;
2544                 }
2545         }
2546         catch(std::exception &e)
2547         {
2548                 infostream<<"ServerMap: Failed to save map to "<<m_savedir
2549                                 <<", exception: "<<e.what()<<std::endl;
2550         }
2551
2552         /*
2553                 Close database if it was opened
2554         */
2555         delete(dbase);
2556
2557 #if 0
2558         /*
2559                 Free all MapChunks
2560         */
2561         core::map<v2s16, MapChunk*>::Iterator i = m_chunks.getIterator();
2562         for(; i.atEnd() == false; i++)
2563         {
2564                 MapChunk *chunk = i.getNode()->getValue();
2565                 delete chunk;
2566         }
2567 #endif
2568
2569         delete m_mgparams;
2570 }
2571
2572 bool ServerMap::initBlockMake(BlockMakeData *data, v3s16 blockpos)
2573 {
2574         bool enable_mapgen_debug_info = m_emerge->mapgen_debug_info;
2575         EMERGE_DBG_OUT("initBlockMake(): " PP(blockpos) " - " PP(blockpos));
2576
2577         s16 chunksize = m_mgparams->chunksize;
2578         s16 coffset = -chunksize / 2;
2579         v3s16 chunk_offset(coffset, coffset, coffset);
2580         v3s16 blockpos_div = getContainerPos(blockpos - chunk_offset, chunksize);
2581         v3s16 blockpos_min = blockpos_div * chunksize;
2582         v3s16 blockpos_max = blockpos_div * chunksize + v3s16(1,1,1)*(chunksize-1);
2583         blockpos_min += chunk_offset;
2584         blockpos_max += chunk_offset;
2585
2586         v3s16 extra_borders(1,1,1);
2587
2588         // Do nothing if not inside limits (+-1 because of neighbors)
2589         if(blockpos_over_limit(blockpos_min - extra_borders) ||
2590                 blockpos_over_limit(blockpos_max + extra_borders))
2591                 return false;
2592
2593         data->seed = m_seed;
2594         data->blockpos_min = blockpos_min;
2595         data->blockpos_max = blockpos_max;
2596         data->blockpos_requested = blockpos;
2597         data->nodedef = m_gamedef->ndef();
2598
2599         /*
2600                 Create the whole area of this and the neighboring blocks
2601         */
2602         {
2603                 //TimeTaker timer("initBlockMake() create area");
2604
2605                 for(s16 x=blockpos_min.X-extra_borders.X;
2606                                 x<=blockpos_max.X+extra_borders.X; x++)
2607                 for(s16 z=blockpos_min.Z-extra_borders.Z;
2608                                 z<=blockpos_max.Z+extra_borders.Z; z++)
2609                 {
2610                         v2s16 sectorpos(x, z);
2611                         // Sector metadata is loaded from disk if not already loaded.
2612                         ServerMapSector *sector = createSector(sectorpos);
2613                         assert(sector);
2614
2615                         for(s16 y=blockpos_min.Y-extra_borders.Y;
2616                                         y<=blockpos_max.Y+extra_borders.Y; y++)
2617                         {
2618                                 v3s16 p(x,y,z);
2619                                 //MapBlock *block = createBlock(p);
2620                                 // 1) get from memory, 2) load from disk
2621                                 MapBlock *block = emergeBlock(p, false);
2622                                 // 3) create a blank one
2623                                 if(block == NULL)
2624                                 {
2625                                         block = createBlock(p);
2626
2627                                         /*
2628                                                 Block gets sunlight if this is true.
2629
2630                                                 Refer to the map generator heuristics.
2631                                         */
2632                                         bool ug = m_emerge->isBlockUnderground(p);
2633                                         block->setIsUnderground(ug);
2634                                 }
2635
2636                                 // Lighting will not be valid after make_chunk is called
2637                                 block->setLightingExpired(true);
2638                                 // Lighting will be calculated
2639                                 //block->setLightingExpired(false);
2640                         }
2641                 }
2642         }
2643
2644         /*
2645                 Now we have a big empty area.
2646
2647                 Make a ManualMapVoxelManipulator that contains this and the
2648                 neighboring blocks
2649         */
2650
2651         // The area that contains this block and it's neighbors
2652         v3s16 bigarea_blocks_min = blockpos_min - extra_borders;
2653         v3s16 bigarea_blocks_max = blockpos_max + extra_borders;
2654
2655         data->vmanip = new ManualMapVoxelManipulator(this);
2656         //data->vmanip->setMap(this);
2657
2658         // Add the area
2659         {
2660                 //TimeTaker timer("initBlockMake() initialEmerge");
2661                 data->vmanip->initialEmerge(bigarea_blocks_min, bigarea_blocks_max, false);
2662         }
2663
2664         // Ensure none of the blocks to be generated were marked as containing CONTENT_IGNORE
2665 /*      for (s16 z = blockpos_min.Z; z <= blockpos_max.Z; z++) {
2666                 for (s16 y = blockpos_min.Y; y <= blockpos_max.Y; y++) {
2667                         for (s16 x = blockpos_min.X; x <= blockpos_max.X; x++) {
2668                                 core::map<v3s16, u8>::Node *n;
2669                                 n = data->vmanip->m_loaded_blocks.find(v3s16(x, y, z));
2670                                 if (n == NULL)
2671                                         continue;
2672                                 u8 flags = n->getValue();
2673                                 flags &= ~VMANIP_BLOCK_CONTAINS_CIGNORE;
2674                                 n->setValue(flags);
2675                         }
2676                 }
2677         }*/
2678
2679         // Data is ready now.
2680         return true;
2681 }
2682
2683 MapBlock* ServerMap::finishBlockMake(BlockMakeData *data,
2684                 std::map<v3s16, MapBlock*> &changed_blocks)
2685 {
2686         v3s16 blockpos_min = data->blockpos_min;
2687         v3s16 blockpos_max = data->blockpos_max;
2688         v3s16 blockpos_requested = data->blockpos_requested;
2689         /*infostream<<"finishBlockMake(): ("<<blockpos_requested.X<<","
2690                         <<blockpos_requested.Y<<","
2691                         <<blockpos_requested.Z<<")"<<std::endl;*/
2692
2693         v3s16 extra_borders(1,1,1);
2694
2695         bool enable_mapgen_debug_info = m_emerge->mapgen_debug_info;
2696
2697         /*infostream<<"Resulting vmanip:"<<std::endl;
2698         data->vmanip.print(infostream);*/
2699
2700         // Make sure affected blocks are loaded
2701         for(s16 x=blockpos_min.X-extra_borders.X;
2702                         x<=blockpos_max.X+extra_borders.X; x++)
2703         for(s16 z=blockpos_min.Z-extra_borders.Z;
2704                         z<=blockpos_max.Z+extra_borders.Z; z++)
2705         for(s16 y=blockpos_min.Y-extra_borders.Y;
2706                         y<=blockpos_max.Y+extra_borders.Y; y++)
2707         {
2708                 v3s16 p(x, y, z);
2709                 // Load from disk if not already in memory
2710                 emergeBlock(p, false);
2711         }
2712
2713         /*
2714                 Blit generated stuff to map
2715                 NOTE: blitBackAll adds nearly everything to changed_blocks
2716         */
2717         {
2718                 // 70ms @cs=8
2719                 //TimeTaker timer("finishBlockMake() blitBackAll");
2720                 data->vmanip->blitBackAll(&changed_blocks);
2721         }
2722
2723         EMERGE_DBG_OUT("finishBlockMake: changed_blocks.size()=" << changed_blocks.size());
2724
2725         /*
2726                 Copy transforming liquid information
2727         */
2728         while(data->transforming_liquid.size() > 0)
2729         {
2730                 v3s16 p = data->transforming_liquid.pop_front();
2731                 m_transforming_liquid.push_back(p);
2732         }
2733
2734         /*
2735                 Do stuff in central blocks
2736         */
2737
2738         /*
2739                 Update lighting
2740         */
2741         {
2742 #if 0
2743                 TimeTaker t("finishBlockMake lighting update");
2744
2745                 core::map<v3s16, MapBlock*> lighting_update_blocks;
2746
2747                 // Center blocks
2748                 for(s16 x=blockpos_min.X-extra_borders.X;
2749                                 x<=blockpos_max.X+extra_borders.X; x++)
2750                 for(s16 z=blockpos_min.Z-extra_borders.Z;
2751                                 z<=blockpos_max.Z+extra_borders.Z; z++)
2752                 for(s16 y=blockpos_min.Y-extra_borders.Y;
2753                                 y<=blockpos_max.Y+extra_borders.Y; y++)
2754                 {
2755                         v3s16 p(x, y, z);
2756                         MapBlock *block = getBlockNoCreateNoEx(p);
2757                         assert(block);
2758                         lighting_update_blocks.insert(block->getPos(), block);
2759                 }
2760
2761                 updateLighting(lighting_update_blocks, changed_blocks);
2762 #endif
2763
2764                 /*
2765                         Set lighting to non-expired state in all of them.
2766                         This is cheating, but it is not fast enough if all of them
2767                         would actually be updated.
2768                 */
2769                 for(s16 x=blockpos_min.X-extra_borders.X;
2770                                 x<=blockpos_max.X+extra_borders.X; x++)
2771                 for(s16 z=blockpos_min.Z-extra_borders.Z;
2772                                 z<=blockpos_max.Z+extra_borders.Z; z++)
2773                 for(s16 y=blockpos_min.Y-extra_borders.Y;
2774                                 y<=blockpos_max.Y+extra_borders.Y; y++)
2775                 {
2776                         v3s16 p(x, y, z);
2777                         getBlockNoCreateNoEx(p)->setLightingExpired(false);
2778                 }
2779
2780 #if 0
2781                 if(enable_mapgen_debug_info == false)
2782                         t.stop(true); // Hide output
2783 #endif
2784         }
2785
2786         /*
2787                 Go through changed blocks
2788         */
2789         for(std::map<v3s16, MapBlock*>::iterator i = changed_blocks.begin();
2790                         i != changed_blocks.end(); ++i)
2791         {
2792                 MapBlock *block = i->second;
2793                 assert(block);
2794                 /*
2795                         Update day/night difference cache of the MapBlocks
2796                 */
2797                 block->expireDayNightDiff();
2798                 /*
2799                         Set block as modified
2800                 */
2801                 block->raiseModified(MOD_STATE_WRITE_NEEDED,
2802                                 "finishBlockMake expireDayNightDiff");
2803         }
2804
2805         /*
2806                 Set central blocks as generated
2807         */
2808         for(s16 x=blockpos_min.X; x<=blockpos_max.X; x++)
2809         for(s16 z=blockpos_min.Z; z<=blockpos_max.Z; z++)
2810         for(s16 y=blockpos_min.Y; y<=blockpos_max.Y; y++)
2811         {
2812                 v3s16 p(x, y, z);
2813                 MapBlock *block = getBlockNoCreateNoEx(p);
2814                 assert(block);
2815                 block->setGenerated(true);
2816         }
2817
2818         /*
2819                 Save changed parts of map
2820                 NOTE: Will be saved later.
2821         */
2822         //save(MOD_STATE_WRITE_AT_UNLOAD);
2823
2824         /*infostream<<"finishBlockMake() done for ("<<blockpos_requested.X
2825                         <<","<<blockpos_requested.Y<<","
2826                         <<blockpos_requested.Z<<")"<<std::endl;*/
2827
2828         /*
2829                 Update weather data in blocks
2830         */
2831         ServerEnvironment *senv = &((Server *)m_gamedef)->getEnv();
2832         for(s16 x=blockpos_min.X-extra_borders.X;
2833                 x<=blockpos_max.X+extra_borders.X; x++)
2834         for(s16 z=blockpos_min.Z-extra_borders.Z;
2835                 z<=blockpos_max.Z+extra_borders.Z; z++)
2836         for(s16 y=blockpos_min.Y-extra_borders.Y;
2837                 y<=blockpos_max.Y+extra_borders.Y; y++)
2838         {
2839                 v3s16 p(x, y, z);
2840                 MapBlock *block = getBlockNoCreateNoEx(p);
2841                 block->heat_last_update     = 0;
2842                 block->humidity_last_update = 0;
2843                 if (senv->m_use_weather) {
2844                         updateBlockHeat(senv, p * MAP_BLOCKSIZE, block);
2845                         updateBlockHumidity(senv, p * MAP_BLOCKSIZE, block);
2846                 } else {
2847                         block->heat     = HEAT_UNDEFINED;
2848                         block->humidity = HUMIDITY_UNDEFINED;
2849                 }
2850         }
2851
2852 #if 0
2853         if(enable_mapgen_debug_info)
2854         {
2855                 /*
2856                         Analyze resulting blocks
2857                 */
2858                 /*for(s16 x=blockpos_min.X-1; x<=blockpos_max.X+1; x++)
2859                 for(s16 z=blockpos_min.Z-1; z<=blockpos_max.Z+1; z++)
2860                 for(s16 y=blockpos_min.Y-1; y<=blockpos_max.Y+1; y++)*/
2861                 for(s16 x=blockpos_min.X-0; x<=blockpos_max.X+0; x++)
2862                 for(s16 z=blockpos_min.Z-0; z<=blockpos_max.Z+0; z++)
2863                 for(s16 y=blockpos_min.Y-0; y<=blockpos_max.Y+0; y++)
2864                 {
2865                         v3s16 p = v3s16(x,y,z);
2866                         MapBlock *block = getBlockNoCreateNoEx(p);
2867                         char spos[20];
2868                         snprintf(spos, 20, "(%2d,%2d,%2d)", x, y, z);
2869                         infostream<<"Generated "<<spos<<": "
2870                                         <<analyze_block(block)<<std::endl;
2871                 }
2872         }
2873 #endif
2874
2875         MapBlock *block = getBlockNoCreateNoEx(blockpos_requested);
2876         assert(block);
2877
2878         return block;
2879 }
2880
2881 ServerMapSector * ServerMap::createSector(v2s16 p2d)
2882 {
2883         DSTACKF("%s: p2d=(%d,%d)",
2884                         __FUNCTION_NAME,
2885                         p2d.X, p2d.Y);
2886
2887         /*
2888                 Check if it exists already in memory
2889         */
2890         ServerMapSector *sector = (ServerMapSector*)getSectorNoGenerateNoEx(p2d);
2891         if(sector != NULL)
2892                 return sector;
2893
2894         /*
2895                 Try to load it from disk (with blocks)
2896         */
2897         //if(loadSectorFull(p2d) == true)
2898
2899         /*
2900                 Try to load metadata from disk
2901         */
2902 #if 0
2903         if(loadSectorMeta(p2d) == true)
2904         {
2905                 ServerMapSector *sector = (ServerMapSector*)getSectorNoGenerateNoEx(p2d);
2906                 if(sector == NULL)
2907                 {
2908                         infostream<<"ServerMap::createSector(): loadSectorFull didn't make a sector"<<std::endl;
2909                         throw InvalidPositionException("");
2910                 }
2911                 return sector;
2912         }
2913 #endif
2914         /*
2915                 Do not create over-limit
2916         */
2917         if(p2d.X < -MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
2918         || p2d.X > MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
2919         || p2d.Y < -MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
2920         || p2d.Y > MAP_GENERATION_LIMIT / MAP_BLOCKSIZE)
2921                 throw InvalidPositionException("createSector(): pos. over limit");
2922
2923         /*
2924                 Generate blank sector
2925         */
2926
2927         sector = new ServerMapSector(this, p2d, m_gamedef);
2928
2929         // Sector position on map in nodes
2930         //v2s16 nodepos2d = p2d * MAP_BLOCKSIZE;
2931
2932         /*
2933                 Insert to container
2934         */
2935         m_sectors[p2d] = sector;
2936
2937         return sector;
2938 }
2939
2940 #if 0
2941 /*
2942         This is a quick-hand function for calling makeBlock().
2943 */
2944 MapBlock * ServerMap::generateBlock(
2945                 v3s16 p,
2946                 std::map<v3s16, MapBlock*> &modified_blocks
2947 )
2948 {
2949         DSTACKF("%s: p=(%d,%d,%d)", __FUNCTION_NAME, p.X, p.Y, p.Z);
2950
2951         /*infostream<<"generateBlock(): "
2952                         <<"("<<p.X<<","<<p.Y<<","<<p.Z<<")"
2953                         <<std::endl;*/
2954
2955         bool enable_mapgen_debug_info = g_settings->getBool("enable_mapgen_debug_info");
2956
2957         TimeTaker timer("generateBlock");
2958
2959         //MapBlock *block = original_dummy;
2960
2961         v2s16 p2d(p.X, p.Z);
2962         v2s16 p2d_nodes = p2d * MAP_BLOCKSIZE;
2963
2964         /*
2965                 Do not generate over-limit
2966         */
2967         if(blockpos_over_limit(p))
2968         {
2969                 infostream<<__FUNCTION_NAME<<": Block position over limit"<<std::endl;
2970                 throw InvalidPositionException("generateBlock(): pos. over limit");
2971         }
2972
2973         /*
2974                 Create block make data
2975         */
2976         BlockMakeData data;
2977         initBlockMake(&data, p);
2978
2979         /*
2980                 Generate block
2981         */
2982         {
2983                 TimeTaker t("mapgen::make_block()");
2984                 mapgen->makeChunk(&data);
2985                 //mapgen::make_block(&data);
2986
2987                 if(enable_mapgen_debug_info == false)
2988                         t.stop(true); // Hide output
2989         }
2990
2991         /*
2992                 Blit data back on map, update lighting, add mobs and whatever this does
2993         */
2994         finishBlockMake(&data, modified_blocks);
2995
2996         /*
2997                 Get central block
2998         */
2999         MapBlock *block = getBlockNoCreateNoEx(p);
3000
3001 #if 0
3002         /*
3003                 Check result
3004         */
3005         if(block)
3006         {
3007                 bool erroneus_content = false;
3008                 for(s16 z0=0; z0<MAP_BLOCKSIZE; z0++)
3009                 for(s16 y0=0; y0<MAP_BLOCKSIZE; y0++)
3010                 for(s16 x0=0; x0<MAP_BLOCKSIZE; x0++)
3011                 {
3012                         v3s16 p(x0,y0,z0);
3013                         MapNode n = block->getNode(p);
3014                         if(n.getContent() == CONTENT_IGNORE)
3015                         {
3016                                 infostream<<"CONTENT_IGNORE at "
3017                                                 <<"("<<p.X<<","<<p.Y<<","<<p.Z<<")"
3018                                                 <<std::endl;
3019                                 erroneus_content = true;
3020                                 assert(0);
3021                         }
3022                 }
3023                 if(erroneus_content)
3024                 {
3025                         assert(0);
3026                 }
3027         }
3028 #endif
3029
3030 #if 0
3031         /*
3032                 Generate a completely empty block
3033         */
3034         if(block)
3035         {
3036                 for(s16 z0=0; z0<MAP_BLOCKSIZE; z0++)
3037                 for(s16 x0=0; x0<MAP_BLOCKSIZE; x0++)
3038                 {
3039                         for(s16 y0=0; y0<MAP_BLOCKSIZE; y0++)
3040                         {
3041                                 MapNode n;
3042                                 n.setContent(CONTENT_AIR);
3043                                 block->setNode(v3s16(x0,y0,z0), n);
3044                         }
3045                 }
3046         }
3047 #endif
3048
3049         if(enable_mapgen_debug_info == false)
3050                 timer.stop(true); // Hide output
3051
3052         return block;
3053 }
3054 #endif
3055
3056 MapBlock * ServerMap::createBlock(v3s16 p)
3057 {
3058         DSTACKF("%s: p=(%d,%d,%d)",
3059                         __FUNCTION_NAME, p.X, p.Y, p.Z);
3060
3061         /*
3062                 Do not create over-limit
3063         */
3064         if(p.X < -MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
3065         || p.X > MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
3066         || p.Y < -MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
3067         || p.Y > MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
3068         || p.Z < -MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
3069         || p.Z > MAP_GENERATION_LIMIT / MAP_BLOCKSIZE)
3070                 throw InvalidPositionException("createBlock(): pos. over limit");
3071
3072         v2s16 p2d(p.X, p.Z);
3073         s16 block_y = p.Y;
3074         /*
3075                 This will create or load a sector if not found in memory.
3076                 If block exists on disk, it will be loaded.
3077
3078                 NOTE: On old save formats, this will be slow, as it generates
3079                       lighting on blocks for them.
3080         */
3081         ServerMapSector *sector;
3082         try{
3083                 sector = (ServerMapSector*)createSector(p2d);
3084                 assert(sector->getId() == MAPSECTOR_SERVER);
3085         }
3086         catch(InvalidPositionException &e)
3087         {
3088                 infostream<<"createBlock: createSector() failed"<<std::endl;
3089                 throw e;
3090         }
3091         /*
3092                 NOTE: This should not be done, or at least the exception
3093                 should not be passed on as std::exception, because it
3094                 won't be catched at all.
3095         */
3096         /*catch(std::exception &e)
3097         {
3098                 infostream<<"createBlock: createSector() failed: "
3099                                 <<e.what()<<std::endl;
3100                 throw e;
3101         }*/
3102
3103         /*
3104                 Try to get a block from the sector
3105         */
3106
3107         MapBlock *block = sector->getBlockNoCreateNoEx(block_y);
3108         if(block)
3109         {
3110                 if(block->isDummy())
3111                         block->unDummify();
3112                 return block;
3113         }
3114         // Create blank
3115         block = sector->createBlankBlock(block_y);
3116
3117         return block;
3118 }
3119
3120 MapBlock * ServerMap::emergeBlock(v3s16 p, bool create_blank)
3121 {
3122         DSTACKF("%s: p=(%d,%d,%d), create_blank=%d",
3123                         __FUNCTION_NAME,
3124                         p.X, p.Y, p.Z, create_blank);
3125
3126         {
3127                 MapBlock *block = getBlockNoCreateNoEx(p);
3128                 if(block && block->isDummy() == false)
3129                         return block;
3130         }
3131
3132         {
3133                 MapBlock *block = loadBlock(p);
3134                 if(block)
3135                         return block;
3136         }
3137
3138         if (create_blank) {
3139                 ServerMapSector *sector = createSector(v2s16(p.X, p.Z));
3140                 MapBlock *block = sector->createBlankBlock(p.Y);
3141
3142                 return block;
3143         }
3144         /*if(allow_generate)
3145         {
3146                 std::map<v3s16, MapBlock*> modified_blocks;
3147                 MapBlock *block = generateBlock(p, modified_blocks);
3148                 if(block)
3149                 {
3150                         MapEditEvent event;
3151                         event.type = MEET_OTHER;
3152                         event.p = p;
3153
3154                         // Copy modified_blocks to event
3155                         for(std::map<v3s16, MapBlock*>::iterator
3156                                         i = modified_blocks.begin();
3157                                         i != modified_blocks.end(); ++i)
3158                         {
3159                                 event.modified_blocks.insert(i->first);
3160                         }
3161
3162                         // Queue event
3163                         dispatchEvent(&event);
3164
3165                         return block;
3166                 }
3167         }*/
3168
3169         return NULL;
3170 }
3171
3172 void ServerMap::prepareBlock(MapBlock *block) {
3173         ServerEnvironment *senv = &((Server *)m_gamedef)->getEnv();
3174
3175         // Calculate weather conditions
3176         block->heat_last_update     = 0;
3177         block->humidity_last_update = 0;
3178         if (senv->m_use_weather) {
3179                 v3s16 p = block->getPos() *  MAP_BLOCKSIZE;
3180                 updateBlockHeat(senv, p, block);
3181                 updateBlockHumidity(senv, p, block);
3182         } else {
3183                 block->heat     = HEAT_UNDEFINED;
3184                 block->humidity = HUMIDITY_UNDEFINED;
3185         }
3186 }
3187
3188 /**
3189  * Get the ground level by searching for a non CONTENT_AIR node in a column from top to bottom
3190  */
3191 s16 ServerMap::findGroundLevel(v2s16 p2d, bool cacheBlocks)
3192 {
3193
3194         s16 level;
3195
3196         // The reference height is the original mapgen height
3197         s16 referenceHeight = m_emerge->getGroundLevelAtPoint(p2d);
3198         s16 maxSearchHeight =  63 + referenceHeight;
3199         s16 minSearchHeight = -63 + referenceHeight;
3200         v3s16 probePosition(p2d.X, maxSearchHeight, p2d.Y);
3201         v3s16 blockPosition = getNodeBlockPos(probePosition);
3202         v3s16 prevBlockPosition = blockPosition;
3203
3204         // Cache the block to be inspected.
3205         if(cacheBlocks) {
3206                 emergeBlock(blockPosition, true);
3207         }
3208
3209         // Probes the nodes in the given column
3210         for(; probePosition.Y > minSearchHeight; probePosition.Y--)
3211         {
3212                 if(cacheBlocks) {
3213                         // Calculate the block position of the given node
3214                         blockPosition = getNodeBlockPos(probePosition);
3215
3216                         // If the node is in an different block, cache it
3217                         if(blockPosition != prevBlockPosition) {
3218                                 emergeBlock(blockPosition, true);
3219                                 prevBlockPosition = blockPosition;
3220                         }
3221                 }
3222
3223                 MapNode node = getNodeNoEx(probePosition);
3224                 if (node.getContent() != CONTENT_IGNORE &&
3225                     node.getContent() != CONTENT_AIR) {
3226                         break;
3227                 }
3228         }
3229
3230         // Could not determine the ground. Use map generator noise functions.
3231         if(probePosition.Y == minSearchHeight) {
3232                 level = referenceHeight;
3233         } else {
3234                 level = probePosition.Y;
3235         }
3236
3237         return level;
3238 }
3239
3240 bool ServerMap::loadFromFolders() {
3241         if(!dbase->Initialized() && !fs::PathExists(m_savedir + DIR_DELIM + "map.sqlite")) // ?
3242                 return true;
3243         return false;
3244 }
3245
3246 void ServerMap::createDirs(std::string path)
3247 {
3248         if(fs::CreateAllDirs(path) == false)
3249         {
3250                 m_dout<<DTIME<<"ServerMap: Failed to create directory "
3251                                 <<"\""<<path<<"\""<<std::endl;
3252                 throw BaseException("ServerMap failed to create directory");
3253         }
3254 }
3255
3256 std::string ServerMap::getSectorDir(v2s16 pos, int layout)
3257 {
3258         char cc[9];
3259         switch(layout)
3260         {
3261                 case 1:
3262                         snprintf(cc, 9, "%.4x%.4x",
3263                                 (unsigned int)pos.X&0xffff,
3264                                 (unsigned int)pos.Y&0xffff);
3265
3266                         return m_savedir + DIR_DELIM + "sectors" + DIR_DELIM + cc;
3267                 case 2:
3268                         snprintf(cc, 9, "%.3x" DIR_DELIM "%.3x",
3269                                 (unsigned int)pos.X&0xfff,
3270                                 (unsigned int)pos.Y&0xfff);
3271
3272                         return m_savedir + DIR_DELIM + "sectors2" + DIR_DELIM + cc;
3273                 default:
3274                         assert(false);
3275         }
3276 }
3277
3278 v2s16 ServerMap::getSectorPos(std::string dirname)
3279 {
3280         unsigned int x, y;
3281         int r;
3282         std::string component;
3283         fs::RemoveLastPathComponent(dirname, &component, 1);
3284         if(component.size() == 8)
3285         {
3286                 // Old layout
3287                 r = sscanf(component.c_str(), "%4x%4x", &x, &y);
3288         }
3289         else if(component.size() == 3)
3290         {
3291                 // New layout
3292                 fs::RemoveLastPathComponent(dirname, &component, 2);
3293                 r = sscanf(component.c_str(), "%3x" DIR_DELIM "%3x", &x, &y);
3294                 // Sign-extend the 12 bit values up to 16 bits...
3295                 if(x&0x800) x|=0xF000;
3296                 if(y&0x800) y|=0xF000;
3297         }
3298         else
3299         {
3300                 assert(false);
3301         }
3302         assert(r == 2);
3303         v2s16 pos((s16)x, (s16)y);
3304         return pos;
3305 }
3306
3307 v3s16 ServerMap::getBlockPos(std::string sectordir, std::string blockfile)
3308 {
3309         v2s16 p2d = getSectorPos(sectordir);
3310
3311         if(blockfile.size() != 4){
3312                 throw InvalidFilenameException("Invalid block filename");
3313         }
3314         unsigned int y;
3315         int r = sscanf(blockfile.c_str(), "%4x", &y);
3316         if(r != 1)
3317                 throw InvalidFilenameException("Invalid block filename");
3318         return v3s16(p2d.X, y, p2d.Y);
3319 }
3320
3321 std::string ServerMap::getBlockFilename(v3s16 p)
3322 {
3323         char cc[5];
3324         snprintf(cc, 5, "%.4x", (unsigned int)p.Y&0xffff);
3325         return cc;
3326 }
3327
3328 void ServerMap::save(ModifiedState save_level)
3329 {
3330         DSTACK(__FUNCTION_NAME);
3331         if(m_map_saving_enabled == false)
3332         {
3333                 infostream<<"WARNING: Not saving map, saving disabled."<<std::endl;
3334                 return;
3335         }
3336
3337         if(save_level == MOD_STATE_CLEAN)
3338                 infostream<<"ServerMap: Saving whole map, this can take time."
3339                                 <<std::endl;
3340
3341         if(m_map_metadata_changed || save_level == MOD_STATE_CLEAN)
3342         {
3343                 saveMapMeta();
3344         }
3345
3346         // Profile modified reasons
3347         Profiler modprofiler;
3348
3349         u32 sector_meta_count = 0;
3350         u32 block_count = 0;
3351         u32 block_count_all = 0; // Number of blocks in memory
3352
3353         // Don't do anything with sqlite unless something is really saved
3354         bool save_started = false;
3355
3356         for(std::map<v2s16, MapSector*>::iterator i = m_sectors.begin();
3357                 i != m_sectors.end(); ++i)
3358         {
3359                 ServerMapSector *sector = (ServerMapSector*)i->second;
3360                 assert(sector->getId() == MAPSECTOR_SERVER);
3361
3362                 if(sector->differs_from_disk || save_level == MOD_STATE_CLEAN)
3363                 {
3364                         saveSectorMeta(sector);
3365                         sector_meta_count++;
3366                 }
3367                 std::list<MapBlock*> blocks;
3368                 sector->getBlocks(blocks);
3369
3370                 for(std::list<MapBlock*>::iterator j = blocks.begin();
3371                         j != blocks.end(); ++j)
3372                 {
3373                         MapBlock *block = *j;
3374
3375                         block_count_all++;
3376
3377                         if(block->getModified() >= (u32)save_level)
3378                         {
3379                                 // Lazy beginSave()
3380                                 if(!save_started){
3381                                         beginSave();
3382                                         save_started = true;
3383                                 }
3384
3385                                 modprofiler.add(block->getModifiedReason(), 1);
3386
3387                                 saveBlock(block);
3388                                 block_count++;
3389
3390                                 /*infostream<<"ServerMap: Written block ("
3391                                                 <<block->getPos().X<<","
3392                                                 <<block->getPos().Y<<","
3393                                                 <<block->getPos().Z<<")"
3394                                                 <<std::endl;*/
3395                         }
3396                 }
3397         }
3398         if(save_started)
3399                 endSave();
3400
3401         /*
3402                 Only print if something happened or saved whole map
3403         */
3404         if(save_level == MOD_STATE_CLEAN || sector_meta_count != 0
3405                         || block_count != 0)
3406         {
3407                 infostream<<"ServerMap: Written: "
3408                                 <<sector_meta_count<<" sector metadata files, "
3409                                 <<block_count<<" block files"
3410                                 <<", "<<block_count_all<<" blocks in memory."
3411                                 <<std::endl;
3412                 PrintInfo(infostream); // ServerMap/ClientMap:
3413                 infostream<<"Blocks modified by: "<<std::endl;
3414                 modprofiler.print(infostream);
3415         }
3416 }
3417
3418 void ServerMap::listAllLoadableBlocks(std::list<v3s16> &dst)
3419 {
3420         if(loadFromFolders()){
3421                 errorstream<<"Map::listAllLoadableBlocks(): Result will be missing "
3422                                 <<"all blocks that are stored in flat files"<<std::endl;
3423         }
3424         dbase->listAllLoadableBlocks(dst);
3425 }
3426
3427 void ServerMap::listAllLoadedBlocks(std::list<v3s16> &dst)
3428 {
3429         for(std::map<v2s16, MapSector*>::iterator si = m_sectors.begin();
3430                 si != m_sectors.end(); ++si)
3431         {
3432                 MapSector *sector = si->second;
3433
3434                 std::list<MapBlock*> blocks;
3435                 sector->getBlocks(blocks);
3436
3437                 for(std::list<MapBlock*>::iterator i = blocks.begin();
3438                                 i != blocks.end(); ++i)
3439                 {
3440                         MapBlock *block = (*i);
3441                         v3s16 p = block->getPos();
3442                         dst.push_back(p);
3443                 }
3444         }
3445 }
3446
3447 void ServerMap::saveMapMeta()
3448 {
3449         DSTACK(__FUNCTION_NAME);
3450
3451         /*infostream<<"ServerMap::saveMapMeta(): "
3452                         <<"seed="<<m_seed
3453                         <<std::endl;*/
3454
3455         createDirs(m_savedir);
3456
3457         std::string fullpath = m_savedir + DIR_DELIM + "map_meta.txt";
3458         std::ostringstream ss(std::ios_base::binary);
3459
3460         Settings params;
3461
3462         m_emerge->setParamsToSettings(&params);
3463         params.writeLines(ss);
3464
3465         ss<<"[end_of_params]\n";
3466
3467         if(!fs::safeWriteToFile(fullpath, ss.str()))
3468         {
3469                 infostream<<"ERROR: ServerMap::saveMapMeta(): "
3470                                 <<"could not write "<<fullpath<<std::endl;
3471                 throw FileNotGoodException("Cannot save chunk metadata");
3472         }
3473
3474         m_map_metadata_changed = false;
3475 }
3476
3477 void ServerMap::loadMapMeta()
3478 {
3479         DSTACK(__FUNCTION_NAME);
3480
3481         /*infostream<<"ServerMap::loadMapMeta(): Loading map metadata"
3482                         <<std::endl;*/
3483
3484         std::string fullpath = m_savedir + DIR_DELIM + "map_meta.txt";
3485         std::ifstream is(fullpath.c_str(), std::ios_base::binary);
3486         if(is.good() == false)
3487         {
3488                 infostream<<"ERROR: ServerMap::loadMapMeta(): "
3489                                 <<"could not open"<<fullpath<<std::endl;
3490                 throw FileNotGoodException("Cannot open map metadata");
3491         }
3492
3493         Settings params;
3494
3495         for(;;)
3496         {
3497                 if(is.eof())
3498                         throw SerializationError
3499                                         ("ServerMap::loadMapMeta(): [end_of_params] not found");
3500                 std::string line;
3501                 std::getline(is, line);
3502                 std::string trimmedline = trim(line);
3503                 if(trimmedline == "[end_of_params]")
3504                         break;
3505                 params.parseConfigLine(line);
3506         }
3507
3508         MapgenParams *mgparams;
3509         try {
3510                 mgparams = m_emerge->getParamsFromSettings(&params);
3511         } catch (SettingNotFoundException &e) {
3512                 infostream << "Couldn't get a setting from map_meta.txt: "
3513                                    << e.what() << std::endl;
3514                 mgparams = NULL;
3515         }
3516
3517         if (mgparams) {
3518                 if (m_mgparams)
3519                         delete m_mgparams;
3520                 m_mgparams = mgparams;
3521                 m_seed = mgparams->seed;
3522         } else {
3523                 if (params.exists("seed")) {
3524                         m_seed = read_seed(params.get("seed").c_str());
3525                         m_mgparams->seed = m_seed;
3526                 }
3527         }
3528
3529         verbosestream<<"ServerMap::loadMapMeta(): "<<"seed="<<m_seed<<std::endl;
3530 }
3531
3532 void ServerMap::saveSectorMeta(ServerMapSector *sector)
3533 {
3534         DSTACK(__FUNCTION_NAME);
3535         // Format used for writing
3536         u8 version = SER_FMT_VER_HIGHEST_WRITE;
3537         // Get destination
3538         v2s16 pos = sector->getPos();
3539         std::string dir = getSectorDir(pos);
3540         createDirs(dir);
3541
3542         std::string fullpath = dir + DIR_DELIM + "meta";
3543         std::ostringstream ss(std::ios_base::binary);
3544
3545         sector->serialize(ss, version);
3546
3547         if(!fs::safeWriteToFile(fullpath, ss.str()))
3548                 throw FileNotGoodException("Cannot write sector metafile");
3549
3550         sector->differs_from_disk = false;
3551 }
3552
3553 MapSector* ServerMap::loadSectorMeta(std::string sectordir, bool save_after_load)
3554 {
3555         DSTACK(__FUNCTION_NAME);
3556         // Get destination
3557         v2s16 p2d = getSectorPos(sectordir);
3558
3559         ServerMapSector *sector = NULL;
3560
3561         std::string fullpath = sectordir + DIR_DELIM + "meta";
3562         std::ifstream is(fullpath.c_str(), std::ios_base::binary);
3563         if(is.good() == false)
3564         {
3565                 // If the directory exists anyway, it probably is in some old
3566                 // format. Just go ahead and create the sector.
3567                 if(fs::PathExists(sectordir))
3568                 {
3569                         /*infostream<<"ServerMap::loadSectorMeta(): Sector metafile "
3570                                         <<fullpath<<" doesn't exist but directory does."
3571                                         <<" Continuing with a sector with no metadata."
3572                                         <<std::endl;*/
3573                         sector = new ServerMapSector(this, p2d, m_gamedef);
3574                         m_sectors[p2d] = sector;
3575                 }
3576                 else
3577                 {
3578                         throw FileNotGoodException("Cannot open sector metafile");
3579                 }
3580         }
3581         else
3582         {
3583                 sector = ServerMapSector::deSerialize
3584                                 (is, this, p2d, m_sectors, m_gamedef);
3585                 if(save_after_load)
3586                         saveSectorMeta(sector);
3587         }
3588
3589         sector->differs_from_disk = false;
3590
3591         return sector;
3592 }
3593
3594 bool ServerMap::loadSectorMeta(v2s16 p2d)
3595 {
3596         DSTACK(__FUNCTION_NAME);
3597
3598         MapSector *sector = NULL;
3599
3600         // The directory layout we're going to load from.
3601         //  1 - original sectors/xxxxzzzz/
3602         //  2 - new sectors2/xxx/zzz/
3603         //  If we load from anything but the latest structure, we will
3604         //  immediately save to the new one, and remove the old.
3605         int loadlayout = 1;
3606         std::string sectordir1 = getSectorDir(p2d, 1);
3607         std::string sectordir;
3608         if(fs::PathExists(sectordir1))
3609         {
3610                 sectordir = sectordir1;
3611         }
3612         else
3613         {
3614                 loadlayout = 2;
3615                 sectordir = getSectorDir(p2d, 2);
3616         }
3617
3618         try{
3619                 sector = loadSectorMeta(sectordir, loadlayout != 2);
3620         }
3621         catch(InvalidFilenameException &e)
3622         {
3623                 return false;
3624         }
3625         catch(FileNotGoodException &e)
3626         {
3627                 return false;
3628         }
3629         catch(std::exception &e)
3630         {
3631                 return false;
3632         }
3633
3634         return true;
3635 }
3636
3637 #if 0
3638 bool ServerMap::loadSectorFull(v2s16 p2d)
3639 {
3640         DSTACK(__FUNCTION_NAME);
3641
3642         MapSector *sector = NULL;
3643
3644         // The directory layout we're going to load from.
3645         //  1 - original sectors/xxxxzzzz/
3646         //  2 - new sectors2/xxx/zzz/
3647         //  If we load from anything but the latest structure, we will
3648         //  immediately save to the new one, and remove the old.
3649         int loadlayout = 1;
3650         std::string sectordir1 = getSectorDir(p2d, 1);
3651         std::string sectordir;
3652         if(fs::PathExists(sectordir1))
3653         {
3654                 sectordir = sectordir1;
3655         }
3656         else
3657         {
3658                 loadlayout = 2;
3659                 sectordir = getSectorDir(p2d, 2);
3660         }
3661
3662         try{
3663                 sector = loadSectorMeta(sectordir, loadlayout != 2);
3664         }
3665         catch(InvalidFilenameException &e)
3666         {
3667                 return false;
3668         }
3669         catch(FileNotGoodException &e)
3670         {
3671                 return false;
3672         }
3673         catch(std::exception &e)
3674         {
3675                 return false;
3676         }
3677
3678         /*
3679                 Load blocks
3680         */
3681         std::vector<fs::DirListNode> list2 = fs::GetDirListing
3682                         (sectordir);
3683         std::vector<fs::DirListNode>::iterator i2;
3684         for(i2=list2.begin(); i2!=list2.end(); i2++)
3685         {
3686                 // We want files
3687                 if(i2->dir)
3688                         continue;
3689                 try{
3690                         loadBlock(sectordir, i2->name, sector, loadlayout != 2);
3691                 }
3692                 catch(InvalidFilenameException &e)
3693                 {
3694                         // This catches unknown crap in directory
3695                 }
3696         }
3697
3698         if(loadlayout != 2)
3699         {
3700                 infostream<<"Sector converted to new layout - deleting "<<
3701                         sectordir1<<std::endl;
3702                 fs::RecursiveDelete(sectordir1);
3703         }
3704
3705         return true;
3706 }
3707 #endif
3708
3709 void ServerMap::beginSave() {
3710         dbase->beginSave();
3711 }
3712
3713 void ServerMap::endSave() {
3714         dbase->endSave();
3715 }
3716
3717 void ServerMap::saveBlock(MapBlock *block)
3718 {
3719   dbase->saveBlock(block);
3720 }
3721
3722 void ServerMap::loadBlock(std::string sectordir, std::string blockfile, MapSector *sector, bool save_after_load)
3723 {
3724         DSTACK(__FUNCTION_NAME);
3725
3726         std::string fullpath = sectordir+DIR_DELIM+blockfile;
3727         try{
3728
3729                 std::ifstream is(fullpath.c_str(), std::ios_base::binary);
3730                 if(is.good() == false)
3731                         throw FileNotGoodException("Cannot open block file");
3732
3733                 v3s16 p3d = getBlockPos(sectordir, blockfile);
3734                 v2s16 p2d(p3d.X, p3d.Z);
3735
3736                 assert(sector->getPos() == p2d);
3737
3738                 u8 version = SER_FMT_VER_INVALID;
3739                 is.read((char*)&version, 1);
3740
3741                 if(is.fail())
3742                         throw SerializationError("ServerMap::loadBlock(): Failed"
3743                                         " to read MapBlock version");
3744
3745                 /*u32 block_size = MapBlock::serializedLength(version);
3746                 SharedBuffer<u8> data(block_size);
3747                 is.read((char*)*data, block_size);*/
3748
3749                 // This will always return a sector because we're the server
3750                 //MapSector *sector = emergeSector(p2d);
3751
3752                 MapBlock *block = NULL;
3753                 bool created_new = false;
3754                 block = sector->getBlockNoCreateNoEx(p3d.Y);
3755                 if(block == NULL)
3756                 {
3757                         block = sector->createBlankBlockNoInsert(p3d.Y);
3758                         created_new = true;
3759                 }
3760
3761                 // Read basic data
3762                 block->deSerialize(is, version, true);
3763
3764                 // If it's a new block, insert it to the map
3765                 if(created_new)
3766                         sector->insertBlock(block);
3767
3768                 /*
3769                         Save blocks loaded in old format in new format
3770                 */
3771
3772                 if(version < SER_FMT_VER_HIGHEST_WRITE || save_after_load)
3773                 {
3774                         saveBlock(block);
3775
3776                         // Should be in database now, so delete the old file
3777                         fs::RecursiveDelete(fullpath);
3778                 }
3779
3780                 // We just loaded it from the disk, so it's up-to-date.
3781                 block->resetModified();
3782
3783         }
3784         catch(SerializationError &e)
3785         {
3786                 infostream<<"WARNING: Invalid block data on disk "
3787                                 <<"fullpath="<<fullpath
3788                                 <<" (SerializationError). "
3789                                 <<"what()="<<e.what()
3790                                 <<std::endl;
3791                                 // Ignoring. A new one will be generated.
3792                 assert(0);
3793
3794                 // TODO: Backup file; name is in fullpath.
3795         }
3796 }
3797
3798 void ServerMap::loadBlock(std::string *blob, v3s16 p3d, MapSector *sector, bool save_after_load)
3799 {
3800         DSTACK(__FUNCTION_NAME);
3801
3802         try {
3803                 std::istringstream is(*blob, std::ios_base::binary);
3804
3805                 u8 version = SER_FMT_VER_INVALID;
3806                 is.read((char*)&version, 1);
3807
3808                 if(is.fail())
3809                         throw SerializationError("ServerMap::loadBlock(): Failed"
3810                                         " to read MapBlock version");
3811
3812                 /*u32 block_size = MapBlock::serializedLength(version);
3813                 SharedBuffer<u8> data(block_size);
3814                 is.read((char*)*data, block_size);*/
3815
3816                 // This will always return a sector because we're the server
3817                 //MapSector *sector = emergeSector(p2d);
3818
3819                 MapBlock *block = NULL;
3820                 bool created_new = false;
3821                 block = sector->getBlockNoCreateNoEx(p3d.Y);
3822                 if(block == NULL)
3823                 {
3824                         block = sector->createBlankBlockNoInsert(p3d.Y);
3825                         created_new = true;
3826                 }
3827
3828                 // Read basic data
3829                 block->deSerialize(is, version, true);
3830
3831                 // If it's a new block, insert it to the map
3832                 if(created_new)
3833                         sector->insertBlock(block);
3834
3835                 /*
3836                         Save blocks loaded in old format in new format
3837                 */
3838
3839                 //if(version < SER_FMT_VER_HIGHEST_READ || save_after_load)
3840                 // Only save if asked to; no need to update version
3841                 if(save_after_load)
3842                         saveBlock(block);
3843
3844                 // We just loaded it from, so it's up-to-date.
3845                 block->resetModified();
3846
3847         }
3848         catch(SerializationError &e)
3849         {
3850                 errorstream<<"Invalid block data in database"
3851                                 <<" ("<<p3d.X<<","<<p3d.Y<<","<<p3d.Z<<")"
3852                                 <<" (SerializationError): "<<e.what()<<std::endl;
3853
3854                 // TODO: Block should be marked as invalid in memory so that it is
3855                 // not touched but the game can run
3856
3857                 if(g_settings->getBool("ignore_world_load_errors")){
3858                         errorstream<<"Ignoring block load error. Duck and cover! "
3859                                         <<"(ignore_world_load_errors)"<<std::endl;
3860                 } else {
3861                         throw SerializationError("Invalid block data in database");
3862                         //assert(0);
3863                 }
3864         }
3865 }
3866
3867 MapBlock* ServerMap::loadBlock(v3s16 blockpos)
3868 {
3869         DSTACK(__FUNCTION_NAME);
3870
3871         v2s16 p2d(blockpos.X, blockpos.Z);
3872
3873         MapBlock *ret;
3874
3875         ret = dbase->loadBlock(blockpos);
3876         if (ret) return (ret);
3877         // Not found in database, try the files
3878
3879         // The directory layout we're going to load from.
3880         //  1 - original sectors/xxxxzzzz/
3881         //  2 - new sectors2/xxx/zzz/
3882         //  If we load from anything but the latest structure, we will
3883         //  immediately save to the new one, and remove the old.
3884         int loadlayout = 1;
3885         std::string sectordir1 = getSectorDir(p2d, 1);
3886         std::string sectordir;
3887         if(fs::PathExists(sectordir1))
3888         {
3889                 sectordir = sectordir1;
3890         }
3891         else
3892         {
3893                 loadlayout = 2;
3894                 sectordir = getSectorDir(p2d, 2);
3895         }
3896
3897         /*
3898                 Make sure sector is loaded
3899         */
3900         MapSector *sector = getSectorNoGenerateNoEx(p2d);
3901         if(sector == NULL)
3902         {
3903                 try{
3904                         sector = loadSectorMeta(sectordir, loadlayout != 2);
3905                 }
3906                 catch(InvalidFilenameException &e)
3907                 {
3908                         return NULL;
3909                 }
3910                 catch(FileNotGoodException &e)
3911                 {
3912                         return NULL;
3913                 }
3914                 catch(std::exception &e)
3915                 {
3916                         return NULL;
3917                 }
3918         }
3919
3920         /*
3921                 Make sure file exists
3922         */
3923
3924         std::string blockfilename = getBlockFilename(blockpos);
3925         if(fs::PathExists(sectordir+DIR_DELIM+blockfilename) == false)
3926                 return NULL;
3927
3928         /*
3929                 Load block and save it to the database
3930         */
3931         loadBlock(sectordir, blockfilename, sector, true);
3932         return getBlockNoCreateNoEx(blockpos);
3933 }
3934
3935 void ServerMap::PrintInfo(std::ostream &out)
3936 {
3937         out<<"ServerMap: ";
3938 }
3939
3940 s16 ServerMap::updateBlockHeat(ServerEnvironment *env, v3s16 p, MapBlock *block)
3941 {
3942         u32 gametime = env->getGameTime();
3943
3944         if (block) {
3945                 if (gametime - block->heat_last_update < 10)
3946                         return block->heat;
3947         } else {
3948                 block = getBlockNoCreateNoEx(getNodeBlockPos(p));
3949         }
3950
3951         f32 heat = m_emerge->biomedef->calcBlockHeat(p, m_seed,
3952                         env->getTimeOfDayF(), gametime * env->getTimeOfDaySpeed());
3953
3954         if(block) {
3955                 block->heat = heat;
3956                 block->heat_last_update = gametime;
3957         }
3958         return heat;
3959 }
3960
3961 s16 ServerMap::updateBlockHumidity(ServerEnvironment *env, v3s16 p, MapBlock *block)
3962 {
3963         u32 gametime = env->getGameTime();
3964
3965         if (block) {
3966                 if (gametime - block->humidity_last_update < 10)
3967                         return block->humidity;
3968         } else {
3969                 block = getBlockNoCreateNoEx(getNodeBlockPos(p));
3970         }
3971
3972         f32 humidity = m_emerge->biomedef->calcBlockHumidity(p, m_seed,
3973                         env->getTimeOfDayF(), gametime * env->getTimeOfDaySpeed());
3974
3975         if(block) {
3976                 block->humidity = humidity;
3977                 block->humidity_last_update = gametime;
3978         }
3979         return humidity;
3980 }
3981
3982 /*
3983         MapVoxelManipulator
3984 */
3985
3986 MapVoxelManipulator::MapVoxelManipulator(Map *map)
3987 {
3988         m_map = map;
3989 }
3990
3991 MapVoxelManipulator::~MapVoxelManipulator()
3992 {
3993         /*infostream<<"MapVoxelManipulator: blocks: "<<m_loaded_blocks.size()
3994                         <<std::endl;*/
3995 }
3996
3997 void MapVoxelManipulator::emerge(VoxelArea a, s32 caller_id)
3998 {
3999         TimeTaker timer1("emerge", &emerge_time);
4000
4001         // Units of these are MapBlocks
4002         v3s16 p_min = getNodeBlockPos(a.MinEdge);
4003         v3s16 p_max = getNodeBlockPos(a.MaxEdge);
4004
4005         VoxelArea block_area_nodes
4006                         (p_min*MAP_BLOCKSIZE, (p_max+1)*MAP_BLOCKSIZE-v3s16(1,1,1));
4007
4008         addArea(block_area_nodes);
4009
4010         for(s32 z=p_min.Z; z<=p_max.Z; z++)
4011         for(s32 y=p_min.Y; y<=p_max.Y; y++)
4012         for(s32 x=p_min.X; x<=p_max.X; x++)
4013         {
4014                 u8 flags = 0;
4015                 MapBlock *block;
4016                 v3s16 p(x,y,z);
4017                 std::map<v3s16, u8>::iterator n;
4018                 n = m_loaded_blocks.find(p);
4019                 if(n != m_loaded_blocks.end())
4020                         continue;
4021
4022                 bool block_data_inexistent = false;
4023                 try
4024                 {
4025                         TimeTaker timer1("emerge load", &emerge_load_time);
4026
4027                         /*infostream<<"Loading block (caller_id="<<caller_id<<")"
4028                                         <<" ("<<p.X<<","<<p.Y<<","<<p.Z<<")"
4029                                         <<" wanted area: ";
4030                         a.print(infostream);
4031                         infostream<<std::endl;*/
4032
4033                         block = m_map->getBlockNoCreate(p);
4034                         if(block->isDummy())
4035                                 block_data_inexistent = true;
4036                         else
4037                                 block->copyTo(*this);
4038                 }
4039                 catch(InvalidPositionException &e)
4040                 {
4041                         block_data_inexistent = true;
4042                 }
4043
4044                 if(block_data_inexistent)
4045                 {
4046                         flags |= VMANIP_BLOCK_DATA_INEXIST;
4047
4048                         VoxelArea a(p*MAP_BLOCKSIZE, (p+1)*MAP_BLOCKSIZE-v3s16(1,1,1));
4049                         // Fill with VOXELFLAG_INEXISTENT
4050                         for(s32 z=a.MinEdge.Z; z<=a.MaxEdge.Z; z++)
4051                         for(s32 y=a.MinEdge.Y; y<=a.MaxEdge.Y; y++)
4052                         {
4053                                 s32 i = m_area.index(a.MinEdge.X,y,z);
4054                                 memset(&m_flags[i], VOXELFLAG_INEXISTENT, MAP_BLOCKSIZE);
4055                         }
4056                 }
4057                 /*else if (block->getNode(0, 0, 0).getContent() == CONTENT_IGNORE)
4058                 {
4059                         // Mark that block was loaded as blank
4060                         flags |= VMANIP_BLOCK_CONTAINS_CIGNORE;
4061                 }*/
4062
4063                 m_loaded_blocks[p] = flags;
4064         }
4065
4066         //infostream<<"emerge done"<<std::endl;
4067 }
4068
4069 /*
4070         SUGG: Add an option to only update eg. water and air nodes.
4071               This will make it interfere less with important stuff if
4072                   run on background.
4073 */
4074 void MapVoxelManipulator::blitBack
4075                 (std::map<v3s16, MapBlock*> & modified_blocks)
4076 {
4077         if(m_area.getExtent() == v3s16(0,0,0))
4078                 return;
4079
4080         //TimeTaker timer1("blitBack");
4081
4082         /*infostream<<"blitBack(): m_loaded_blocks.size()="
4083                         <<m_loaded_blocks.size()<<std::endl;*/
4084
4085         /*
4086                 Initialize block cache
4087         */
4088         v3s16 blockpos_last;
4089         MapBlock *block = NULL;
4090         bool block_checked_in_modified = false;
4091
4092         for(s32 z=m_area.MinEdge.Z; z<=m_area.MaxEdge.Z; z++)
4093         for(s32 y=m_area.MinEdge.Y; y<=m_area.MaxEdge.Y; y++)
4094         for(s32 x=m_area.MinEdge.X; x<=m_area.MaxEdge.X; x++)
4095         {
4096                 v3s16 p(x,y,z);
4097
4098                 u8 f = m_flags[m_area.index(p)];
4099                 if(f & (VOXELFLAG_NOT_LOADED|VOXELFLAG_INEXISTENT))
4100                         continue;
4101
4102                 MapNode &n = m_data[m_area.index(p)];
4103
4104                 v3s16 blockpos = getNodeBlockPos(p);
4105
4106                 try
4107                 {
4108                         // Get block
4109                         if(block == NULL || blockpos != blockpos_last){
4110                                 block = m_map->getBlockNoCreate(blockpos);
4111                                 blockpos_last = blockpos;
4112                                 block_checked_in_modified = false;
4113                         }
4114
4115                         // Calculate relative position in block
4116                         v3s16 relpos = p - blockpos * MAP_BLOCKSIZE;
4117
4118                         // Don't continue if nothing has changed here
4119                         if(block->getNode(relpos) == n)
4120                                 continue;
4121
4122                         //m_map->setNode(m_area.MinEdge + p, n);
4123                         block->setNode(relpos, n);
4124
4125                         /*
4126                                 Make sure block is in modified_blocks
4127                         */
4128                         if(block_checked_in_modified == false)
4129                         {
4130                                 modified_blocks[blockpos] = block;
4131                                 block_checked_in_modified = true;
4132                         }
4133                 }
4134                 catch(InvalidPositionException &e)
4135                 {
4136                 }
4137         }
4138 }
4139
4140 ManualMapVoxelManipulator::ManualMapVoxelManipulator(Map *map):
4141                 MapVoxelManipulator(map),
4142                 m_create_area(false)
4143 {
4144 }
4145
4146 ManualMapVoxelManipulator::~ManualMapVoxelManipulator()
4147 {
4148 }
4149
4150 void ManualMapVoxelManipulator::emerge(VoxelArea a, s32 caller_id)
4151 {
4152         // Just create the area so that it can be pointed to
4153         VoxelManipulator::emerge(a, caller_id);
4154 }
4155
4156 void ManualMapVoxelManipulator::initialEmerge(v3s16 blockpos_min,
4157                                                 v3s16 blockpos_max, bool load_if_inexistent)
4158 {
4159         TimeTaker timer1("initialEmerge", &emerge_time);
4160
4161         // Units of these are MapBlocks
4162         v3s16 p_min = blockpos_min;
4163         v3s16 p_max = blockpos_max;
4164
4165         VoxelArea block_area_nodes
4166                         (p_min*MAP_BLOCKSIZE, (p_max+1)*MAP_BLOCKSIZE-v3s16(1,1,1));
4167
4168         u32 size_MB = block_area_nodes.getVolume()*4/1000000;
4169         if(size_MB >= 1)
4170         {
4171                 infostream<<"initialEmerge: area: ";
4172                 block_area_nodes.print(infostream);
4173                 infostream<<" ("<<size_MB<<"MB)";
4174                 infostream<<std::endl;
4175         }
4176
4177         addArea(block_area_nodes);
4178
4179         for(s32 z=p_min.Z; z<=p_max.Z; z++)
4180         for(s32 y=p_min.Y; y<=p_max.Y; y++)
4181         for(s32 x=p_min.X; x<=p_max.X; x++)
4182         {
4183                 u8 flags = 0;
4184                 MapBlock *block;
4185                 v3s16 p(x,y,z);
4186                 std::map<v3s16, u8>::iterator n;
4187                 n = m_loaded_blocks.find(p);
4188                 if(n != m_loaded_blocks.end())
4189                         continue;
4190
4191                 bool block_data_inexistent = false;
4192                 try
4193                 {
4194                         TimeTaker timer1("emerge load", &emerge_load_time);
4195
4196                         block = m_map->getBlockNoCreate(p);
4197                         if(block->isDummy())
4198                                 block_data_inexistent = true;
4199                         else
4200                                 block->copyTo(*this);
4201                 }
4202                 catch(InvalidPositionException &e)
4203                 {
4204                         block_data_inexistent = true;
4205                 }
4206
4207                 if(block_data_inexistent)
4208                 {
4209
4210                         if (load_if_inexistent) {
4211                                 ServerMap *svrmap = (ServerMap *)m_map;
4212                                 block = svrmap->emergeBlock(p, false);
4213                                 if (block == NULL)
4214                                         block = svrmap->createBlock(p);
4215                                 else
4216                                         block->copyTo(*this);
4217                         } else {
4218                                 flags |= VMANIP_BLOCK_DATA_INEXIST;
4219
4220                                 /*
4221                                         Mark area inexistent
4222                                 */
4223                                 VoxelArea a(p*MAP_BLOCKSIZE, (p+1)*MAP_BLOCKSIZE-v3s16(1,1,1));
4224                                 // Fill with VOXELFLAG_INEXISTENT
4225                                 for(s32 z=a.MinEdge.Z; z<=a.MaxEdge.Z; z++)
4226                                 for(s32 y=a.MinEdge.Y; y<=a.MaxEdge.Y; y++)
4227                                 {
4228                                         s32 i = m_area.index(a.MinEdge.X,y,z);
4229                                         memset(&m_flags[i], VOXELFLAG_INEXISTENT, MAP_BLOCKSIZE);
4230                                 }
4231                         }
4232                 }
4233                 /*else if (block->getNode(0, 0, 0).getContent() == CONTENT_IGNORE)
4234                 {
4235                         // Mark that block was loaded as blank
4236                         flags |= VMANIP_BLOCK_CONTAINS_CIGNORE;
4237                 }*/
4238
4239                 m_loaded_blocks[p] = flags;
4240         }
4241 }
4242
4243 void ManualMapVoxelManipulator::blitBackAll(
4244                 std::map<v3s16, MapBlock*> * modified_blocks)
4245 {
4246         if(m_area.getExtent() == v3s16(0,0,0))
4247                 return;
4248
4249         /*
4250                 Copy data of all blocks
4251         */
4252         for(std::map<v3s16, u8>::iterator
4253                         i = m_loaded_blocks.begin();
4254                         i != m_loaded_blocks.end(); ++i)
4255         {
4256                 v3s16 p = i->first;
4257                 MapBlock *block = m_map->getBlockNoCreateNoEx(p);
4258                 bool existed = !(i->second & VMANIP_BLOCK_DATA_INEXIST);
4259                 if(existed == false)
4260                 {
4261                         continue;
4262                 }
4263
4264                 block->copyFrom(*this);
4265
4266                 if(modified_blocks)
4267                         (*modified_blocks)[p] = block;
4268         }
4269 }
4270
4271 //END