src/mapgen.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 "mapgen.h"
  21 #include "voxel.h"
  22 #include "noise.h"
  23 #include "biome.h"
  24 #include "mapblock.h"
  25 #include "mapnode.h"
  26 #include "map.h"
  27 //#include "serverobject.h"
  28 #include "content_sao.h"
  29 #include "nodedef.h"
  30 #include "content_mapnode.h" // For content_mapnode_get_new_name
  31 #include "voxelalgorithms.h"
  32 #include "profiler.h"
  33 #include "settings.h" // For g_settings
  34 #include "main.h" // For g_profiler
  35 #include "treegen.h"
  36 #include "mapgen_v6.h"
  37 #include "mapgen_v7.h"
  38 #include "util/serialize.h"
  39
  40 FlagDesc flagdesc_mapgen[] = {
  41         {"trees",          MG_TREES},
  42         {"caves",          MG_CAVES},
  43         {"dungeons",       MG_DUNGEONS},
  44         {"v6_jungles",     MGV6_JUNGLES},
  45         {"v6_biome_blend", MGV6_BIOME_BLEND},
  46         {"flat",           MG_FLAT},
  47         {NULL,             0}
  48 };
  49
  50 FlagDesc flagdesc_ore[] = {
  51         {"absheight",            OREFLAG_ABSHEIGHT},
  52         {"scatter_noisedensity", OREFLAG_DENSITY},
  53         {"claylike_nodeisnt",    OREFLAG_NODEISNT},
  54         {NULL,                   0}
  55 };
  56
  57 FlagDesc flagdesc_deco_schematic[] = {
  58         {"place_center_x", DECO_PLACE_CENTER_X},
  59         {"place_center_y", DECO_PLACE_CENTER_Y},
  60         {"place_center_z", DECO_PLACE_CENTER_Z},
  61         {NULL,             0}
  62 };
  63
  64 ///////////////////////////////////////////////////////////////////////////////
  65
  66
  67 Ore *createOre(OreType type) {
  68         switch (type) {
  69                 case ORE_SCATTER:
  70                         return new OreScatter;
  71                 case ORE_SHEET:
  72                         return new OreSheet;
  73                 //case ORE_CLAYLIKE: //TODO: implement this!
  74                 //      return new OreClaylike;
  75                 default:
  76                         return NULL;
  77         }
  78 }
  79
  80
  81 Ore::~Ore() {
  82         delete np;
  83         delete noise;
  84 }
  85
  86
  87 void Ore::resolveNodeNames(INodeDefManager *ndef) {
  88         if (ore == CONTENT_IGNORE) {
  89                 ore = ndef->getId(ore_name);
  90                 if (ore == CONTENT_IGNORE) {
  91                         errorstream << "Ore::resolveNodeNames: ore node '"
  92                                 << ore_name << "' not defined";
  93                         ore     = CONTENT_AIR;
  94                         wherein = CONTENT_AIR;
  95                 }
  96         }
  97
  98         if (wherein == CONTENT_IGNORE) {
  99                 wherein = ndef->getId(wherein_name);
 100                 if (wherein == CONTENT_IGNORE) {
 101                         errorstream << "Ore::resolveNodeNames: wherein node '"
 102                                 << wherein_name << "' not defined";
 103                         ore     = CONTENT_AIR;
 104                         wherein = CONTENT_AIR;
 105                 }
 106         }
 107 }
 108
 109
 110 void Ore::placeOre(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax) {
 111         int in_range = 0;
 112
 113         in_range |= (nmin.Y <= height_max && nmax.Y >= height_min);
 114         if (flags & OREFLAG_ABSHEIGHT)
 115                 in_range |= (nmin.Y >= -height_max && nmax.Y <= -height_min) << 1;
 116         if (!in_range)
 117                 return;
 118
 119         int ymin, ymax;
 120         if (in_range & ORE_RANGE_MIRROR) {
 121                 ymin = MYMAX(nmin.Y, -height_max);
 122                 ymax = MYMIN(nmax.Y, -height_min);
 123         } else {
 124                 ymin = MYMAX(nmin.Y, height_min);
 125                 ymax = MYMIN(nmax.Y, height_max);
 126         }
 127         if (clust_size >= ymax - ymin + 1)
 128                 return;
 129
 130         nmin.Y = ymin;
 131         nmax.Y = ymax;
 132         generate(mg->vm, mg->seed, blockseed, nmin, nmax);
 133 }
 134
 135
 136 void OreScatter::generate(ManualMapVoxelManipulator *vm, int seed,
 137                                                   u32 blockseed, v3s16 nmin, v3s16 nmax) {
 138         PseudoRandom pr(blockseed);
 139         MapNode n_ore(ore, 0, ore_param2);
 140
 141         int volume = (nmax.X - nmin.X + 1) *
 142                                  (nmax.Y - nmin.Y + 1) *
 143                                  (nmax.Z - nmin.Z + 1);
 144         int csize     = clust_size;
 145         int orechance = (csize * csize * csize) / clust_num_ores;
 146         int nclusters = volume / clust_scarcity;
 147
 148         for (int i = 0; i != nclusters; i++) {
 149                 int x0 = pr.range(nmin.X, nmax.X - csize + 1);
 150                 int y0 = pr.range(nmin.Y, nmax.Y - csize + 1);
 151                 int z0 = pr.range(nmin.Z, nmax.Z - csize + 1);
 152
 153                 if (np && (NoisePerlin3D(np, x0, y0, z0, seed) < nthresh))
 154                         continue;
 155
 156                 for (int z1 = 0; z1 != csize; z1++)
 157                 for (int y1 = 0; y1 != csize; y1++)
 158                 for (int x1 = 0; x1 != csize; x1++) {
 159                         if (pr.range(1, orechance) != 1)
 160                                 continue;
 161
 162                         u32 i = vm->m_area.index(x0 + x1, y0 + y1, z0 + z1);
 163                         if (vm->m_data[i].getContent() == wherein)
 164                                 vm->m_data[i] = n_ore;
 165                 }
 166         }
 167 }
 168
 169
 170 void OreSheet::generate(ManualMapVoxelManipulator *vm, int seed,
 171                                                 u32 blockseed, v3s16 nmin, v3s16 nmax) {
 172         PseudoRandom pr(blockseed + 4234);
 173         MapNode n_ore(ore, 0, ore_param2);
 174
 175         int max_height = clust_size;
 176         int y_start = pr.range(nmin.Y, nmax.Y - max_height);
 177
 178         if (!noise) {
 179                 int sx = nmax.X - nmin.X + 1;
 180                 int sz = nmax.Z - nmin.Z + 1;
 181                 noise = new Noise(np, 0, sx, sz);
 182         }
 183         noise->seed = seed + y_start;
 184         noise->perlinMap2D(nmin.X, nmin.Z);
 185
 186         int index = 0;
 187         for (int z = nmin.Z; z <= nmax.Z; z++)
 188         for (int x = nmin.X; x <= nmax.X; x++) {
 189                 float noiseval = noise->result[index++];
 190                 if (noiseval < nthresh)
 191                         continue;
 192
 193                 int height = max_height * (1. / pr.range(1, 3));
 194                 int y0 = y_start + np->scale * noiseval; //pr.range(1, 3) - 1;
 195                 int y1 = y0 + height;
 196                 for (int y = y0; y != y1; y++) {
 197                         u32 i = vm->m_area.index(x, y, z);
 198                         if (!vm->m_area.contains(i))
 199                                 continue;
 200
 201                         if (vm->m_data[i].getContent() == wherein)
 202                                 vm->m_data[i] = n_ore;
 203                 }
 204         }
 205 }
 206
 207
 208 ///////////////////////////////////////////////////////////////////////////////
 209
 210
 211 Decoration *createDecoration(DecorationType type) {
 212         switch (type) {
 213                 case DECO_SIMPLE:
 214                         return new DecoSimple;
 215                 case DECO_SCHEMATIC:
 216                         return new DecoSchematic;
 217                 //case DECO_LSYSTEM:
 218                 //      return new DecoLSystem;
 219                 default:
 220                         return NULL;
 221         }
 222 }
 223
 224
 225 Decoration::Decoration() {
 226         mapseed    = 0;
 227         np         = NULL;
 228         fill_ratio = 0;
 229         sidelen    = 1;
 230 }
 231
 232
 233 Decoration::~Decoration() {
 234         delete np;
 235 }
 236
 237
 238 void Decoration::resolveNodeNames(INodeDefManager *ndef) {
 239         if (c_place_on == CONTENT_IGNORE)
 240                 c_place_on = ndef->getId(place_on_name);
 241 }
 242
 243
 244 void Decoration::placeDeco(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax) {
 245         PseudoRandom ps(blockseed + 53);
 246         int carea_size = nmax.X - nmin.X + 1;
 247
 248         // Divide area into parts
 249         if (carea_size % sidelen) {
 250                 errorstream << "Decoration::placeDeco: chunk size is not divisible by "
 251                         "sidelen; setting sidelen to " << carea_size << std::endl;
 252                 sidelen = carea_size;
 253         }
 254
 255         s16 divlen = carea_size / sidelen;
 256         int area = sidelen * sidelen;
 257
 258         for (s16 z0 = 0; z0 < divlen; z0++)
 259         for (s16 x0 = 0; x0 < divlen; x0++) {
 260                 v2s16 p2d_center( // Center position of part of division
 261                         nmin.X + sidelen / 2 + sidelen * x0,
 262                         nmin.Z + sidelen / 2 + sidelen * z0
 263                 );
 264                 v2s16 p2d_min( // Minimum edge of part of division
 265                         nmin.X + sidelen * x0,
 266                         nmin.Z + sidelen * z0
 267                 );
 268                 v2s16 p2d_max( // Maximum edge of part of division
 269                         nmin.X + sidelen + sidelen * x0 - 1,
 270                         nmin.Z + sidelen + sidelen * z0 - 1
 271                 );
 272
 273                 // Amount of decorations
 274                 float nval = np ?
 275                         NoisePerlin2D(np, p2d_center.X, p2d_center.Y, mapseed) :
 276                         fill_ratio;
 277                 u32 deco_count = area * MYMAX(nval, 0.f);
 278
 279                 for (u32 i = 0; i < deco_count; i++) {
 280                         s16 x = ps.range(p2d_min.X, p2d_max.X);
 281                         s16 z = ps.range(p2d_min.Y, p2d_max.Y);
 282
 283                         int mapindex = carea_size * (z - nmin.Z) + (x - nmin.X);
 284
 285                         s16 y = mg->heightmap ?
 286                                         mg->heightmap[mapindex] :
 287                                         mg->findGroundLevel(v2s16(x, z), nmin.Y, nmax.Y);
 288
 289                         if (y < nmin.Y || y > nmax.Y)
 290                                 continue;
 291
 292                         int height = getHeight();
 293                         int max_y = nmax.Y + MAP_BLOCKSIZE;
 294                         if (y + 1 + height > max_y) {
 295                                 continue;
 296 #if 0
 297                                 printf("Decoration at (%d %d %d) cut off\n", x, y, z);
 298                                 //add to queue
 299                                 JMutexAutoLock cutofflock(cutoff_mutex);
 300                                 cutoffs.push_back(CutoffData(x, y, z, height));
 301 #endif
 302                         }
 303
 304                         if (mg->biomemap) {
 305                                 std::set<u8>::iterator iter;
 306
 307                                 if (biomes.size()) {
 308                                         iter = biomes.find(mg->biomemap[mapindex]);
 309                                         if (iter == biomes.end())
 310                                                 continue;
 311                                 }
 312                         }
 313
 314                         generate(mg, &ps, max_y, 0, v3s16(x, y, z));
 315                 }
 316         }
 317 }
 318
 319
 320 #if 0
 321 void Decoration::placeCutoffs(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax) {
 322         PseudoRandom pr(blockseed + 53);
 323         std::vector<CutoffData> handled_cutoffs;
 324
 325         // Copy over the cutoffs we're interested in so we don't needlessly hold a lock
 326         {
 327                 JMutexAutoLock cutofflock(cutoff_mutex);
 328                 for (std::list<CutoffData>::iterator i = cutoffs.begin();
 329                         i != cutoffs.end(); ++i) {
 330                         CutoffData cutoff = *i;
 331                         v3s16 p    = cutoff.p;
 332                         s16 height = cutoff.height;
 333                         if (p.X < nmin.X || p.X > nmax.X ||
 334                                 p.Z < nmin.Z || p.Z > nmax.Z)
 335                                 continue;
 336                         if (p.Y + height < nmin.Y || p.Y > nmax.Y)
 337                                 continue;
 338
 339                         handled_cutoffs.push_back(cutoff);
 340                 }
 341         }
 342
 343         // Generate the cutoffs
 344         for (size_t i = 0; i != handled_cutoffs.size(); i++) {
 345                 v3s16 p    = handled_cutoffs[i].p;
 346                 s16 height = handled_cutoffs[i].height;
 347
 348                 if (p.Y + height > nmax.Y) {
 349                         //printf("Decoration at (%d %d %d) cut off again!\n", p.X, p.Y, p.Z);
 350                         cuttoffs.push_back(v3s16(p.X, p.Y, p.Z));
 351                 }
 352
 353                 generate(mg, &pr, nmax.Y, nmin.Y - p.Y, v3s16(p.X, nmin.Y, p.Z));
 354         }
 355
 356         // Remove cutoffs that were handled from the cutoff list
 357         {
 358                 JMutexAutoLock cutofflock(cutoff_mutex);
 359                 for (std::list<CutoffData>::iterator i = cutoffs.begin();
 360                         i != cutoffs.end(); ++i) {
 361
 362                         for (size_t j = 0; j != handled_cutoffs.size(); j++) {
 363                                 CutoffData coff = *i;
 364                                 if (coff.p == handled_cutoffs[j].p)
 365                                         i = cutoffs.erase(i);
 366                         }
 367                 }
 368         }
 369 }
 370 #endif
 371
 372
 373 ///////////////////////////////////////////////////////////////////////////////
 374
 375
 376 void DecoSimple::resolveNodeNames(INodeDefManager *ndef) {
 377         Decoration::resolveNodeNames(ndef);
 378
 379         if (c_deco == CONTENT_IGNORE) {
 380                 c_deco = ndef->getId(deco_name);
 381                 if (c_deco == CONTENT_IGNORE) {
 382                         errorstream << "DecoSimple::resolveNodeNames: decoration node '"
 383                                 << deco_name << "' not defined" << std::endl;
 384                         c_deco = CONTENT_AIR;
 385                 }
 386         }
 387         if (c_spawnby == CONTENT_IGNORE) {
 388                 c_spawnby = ndef->getId(spawnby_name);
 389                 if (c_spawnby == CONTENT_IGNORE) {
 390                         errorstream << "DecoSimple::resolveNodeNames: spawnby node '"
 391                                 << deco_name << "' not defined" << std::endl;
 392                         nspawnby = -1;
 393                         c_spawnby = CONTENT_AIR;
 394                 }
 395         }
 396
 397         if (c_decolist.size())
 398                 return;
 399
 400         for (size_t i = 0; i != decolist_names.size(); i++) {
 401                 content_t c = ndef->getId(decolist_names[i]);
 402                 if (c == CONTENT_IGNORE) {
 403                         errorstream << "DecoSimple::resolveNodeNames: decolist node '"
 404                                 << decolist_names[i] << "' not defined" << std::endl;
 405                         c = CONTENT_AIR;
 406                 }
 407                 c_decolist.push_back(c);
 408         }
 409 }
 410
 411
 412 void DecoSimple::generate(Mapgen *mg, PseudoRandom *pr, s16 max_y,
 413                                                 s16 start_y, v3s16 p) {
 414         ManualMapVoxelManipulator *vm = mg->vm;
 415
 416         u32 vi = vm->m_area.index(p);
 417         if (vm->m_data[vi].getContent() != c_place_on &&
 418                 c_place_on != CONTENT_IGNORE)
 419                 return;
 420
 421         if (nspawnby != -1) {
 422                 int nneighs = 0;
 423                 v3s16 dirs[8] = { // a Moore neighborhood
 424                         v3s16( 0, 0,  1),
 425                         v3s16( 0, 0, -1),
 426                         v3s16( 1, 0,  0),
 427                         v3s16(-1, 0,  0),
 428                         v3s16( 1, 0,  1),
 429                         v3s16(-1, 0,  1),
 430                         v3s16(-1, 0, -1),
 431                         v3s16( 1, 0, -1)
 432                 };
 433
 434                 for (int i = 0; i != 8; i++) {
 435                         u32 index = vm->m_area.index(p + dirs[i]);
 436                         if (vm->m_area.contains(index) &&
 437                                 vm->m_data[index].getContent() == c_spawnby)
 438                                 nneighs++;
 439                 }
 440
 441                 if (nneighs < nspawnby)
 442                         return;
 443         }
 444
 445         size_t ndecos = c_decolist.size();
 446         content_t c_place = ndecos ? c_decolist[pr->range(0, ndecos - 1)] : c_deco;
 447
 448         s16 height = (deco_height_max > 0) ?
 449                 pr->range(deco_height, deco_height_max) : deco_height;
 450
 451         height = MYMIN(height, max_y - p.Y);
 452
 453         v3s16 em = vm->m_area.getExtent();
 454         for (int i = start_y; i < height; i++) {
 455                 vm->m_area.add_y(em, vi, 1);
 456
 457                 content_t c = vm->m_data[vi].getContent();
 458                 if (c != CONTENT_AIR && c != CONTENT_IGNORE)
 459                         break;
 460
 461                 vm->m_data[vi] = MapNode(c_place);
 462         }
 463 }
 464
 465
 466 int DecoSimple::getHeight() {
 467         return (deco_height_max > 0) ? deco_height_max : deco_height;
 468 }
 469
 470
 471 std::string DecoSimple::getName() {
 472         return deco_name;
 473 }
 474
 475
 476 ///////////////////////////////////////////////////////////////////////////////
 477
 478
 479 DecoSchematic::DecoSchematic() {
 480         node_names = NULL;
 481         schematic  = NULL;
 482         flags      = 0;
 483         size       = v3s16(0, 0, 0);
 484 }
 485
 486
 487 DecoSchematic::~DecoSchematic() {
 488         delete node_names;
 489         delete []schematic;
 490 }
 491
 492
 493 void DecoSchematic::resolveNodeNames(INodeDefManager *ndef) {
 494         Decoration::resolveNodeNames(ndef);
 495
 496         if (filename.empty())
 497                 return;
 498
 499         if (!node_names) {
 500                 errorstream << "DecoSchematic::resolveNodeNames: node name list was "
 501                         "not created" << std::endl;
 502                 return;
 503         }
 504
 505         for (size_t i = 0; i != node_names->size(); i++) {
 506                 content_t c = ndef->getId(node_names->at(i));
 507                 if (c == CONTENT_IGNORE) {
 508                         errorstream << "DecoSchematic::resolveNodeNames: node '"
 509                                 << node_names->at(i) << "' not defined" << std::endl;
 510                         c = CONTENT_AIR;
 511                 }
 512                 c_nodes.push_back(c);
 513         }
 514
 515         for (int i = 0; i != size.X * size.Y * size.Z; i++)
 516                 schematic[i].setContent(c_nodes[schematic[i].getContent()]);
 517
 518         delete node_names;
 519         node_names = NULL;
 520 }
 521
 522
 523 void DecoSchematic::generate(Mapgen *mg, PseudoRandom *pr, s16 max_y,
 524                                                         s16 start_y, v3s16 p) {
 525         ManualMapVoxelManipulator *vm = mg->vm;
 526
 527         if (flags & DECO_PLACE_CENTER_X)
 528                 p.X -= (size.X + 1) / 2;
 529         if (flags & DECO_PLACE_CENTER_Y)
 530                 p.Y -= (size.Y + 1) / 2;
 531         if (flags & DECO_PLACE_CENTER_Z)
 532                 p.Z -= (size.Z + 1) / 2;
 533
 534         u32 vi = vm->m_area.index(p);
 535         if (vm->m_data[vi].getContent() != c_place_on &&
 536                 c_place_on != CONTENT_IGNORE)
 537                 return;
 538
 539         u32 i = 0;
 540         for (s16 z = 0; z != size.Z; z++)
 541         for (s16 y = 0; y != size.Y; y++) {
 542                 vi = vm->m_area.index(p.X, p.Y + y, p.Z + z);
 543                 for (s16 x = 0; x != size.X; x++, i++, vi++) {
 544                         if (!vm->m_area.contains(vi))
 545                                 continue;
 546
 547                         content_t c = vm->m_data[vi].getContent();
 548                         if (c != CONTENT_AIR && c != CONTENT_IGNORE)
 549                                 continue;
 550
 551                         if (schematic[i].param1 && myrand_range(1, 256) > schematic[i].param1)
 552                                 continue;
 553
 554                         vm->m_data[vi] = schematic[i];
 555                         vm->m_data[vi].param1 = 0;
 556                 }
 557         }
 558 }
 559
 560
 561 int DecoSchematic::getHeight() {
 562         return size.Y;
 563 }
 564
 565
 566 std::string DecoSchematic::getName() {
 567         return filename;
 568 }
 569
 570
 571 void DecoSchematic::placeStructure(Map *map, v3s16 p) {
 572         assert(schematic != NULL);
 573         ManualMapVoxelManipulator *vm = new ManualMapVoxelManipulator(map);
 574
 575         if (flags & DECO_PLACE_CENTER_X)
 576                 p.X -= (size.X + 1) / 2;
 577         if (flags & DECO_PLACE_CENTER_Y)
 578                 p.Y -= (size.Y + 1) / 2;
 579         if (flags & DECO_PLACE_CENTER_Z)
 580                 p.Z -= (size.Z + 1) / 2;
 581
 582         v3s16 bp1 = getNodeBlockPos(p);
 583         v3s16 bp2 = getNodeBlockPos(p + size - v3s16(1,1,1));
 584         vm->initialEmerge(bp1, bp2);
 585
 586         u32 i = 0;
 587         for (s16 z = 0; z != size.Z; z++)
 588         for (s16 y = 0; y != size.Y; y++) {
 589                 u32 vi = vm->m_area.index(p.X, p.Y + y, p.Z + z);
 590                 for (s16 x = 0; x != size.X; x++, i++, vi++) {
 591                         if (!vm->m_area.contains(vi))
 592                                 continue;
 593                         if (schematic[i].param1 && myrand_range(1, 256) > schematic[i].param1)
 594                                 continue;
 595
 596                         vm->m_data[vi] = schematic[i];
 597                         vm->m_data[vi].param1 = 0;
 598                 }
 599         }
 600
 601         std::map<v3s16, MapBlock *> lighting_modified_blocks;
 602         std::map<v3s16, MapBlock *> modified_blocks;
 603         vm->blitBackAll(&modified_blocks);
 604
 605         // TODO: Optimize this by using Mapgen::calcLighting() instead
 606         lighting_modified_blocks.insert(modified_blocks.begin(), modified_blocks.end());
 607         map->updateLighting(lighting_modified_blocks, modified_blocks);
 608
 609         MapEditEvent event;
 610         event.type = MEET_OTHER;
 611         for (std::map<v3s16, MapBlock *>::iterator
 612                 it = modified_blocks.begin();
 613                 it != modified_blocks.end(); ++it)
 614                 event.modified_blocks.insert(it->first);
 615
 616         map->dispatchEvent(&event);
 617 }
 618
 619
 620 bool DecoSchematic::loadSchematicFile() {
 621         std::ifstream is(filename.c_str(), std::ios_base::binary);
 622
 623         u32 signature = readU32(is);
 624         if (signature != 'MTSM') {
 625                 errorstream << "loadSchematicFile: invalid schematic "
 626                         "file" << std::endl;
 627                 return false;
 628         }
 629
 630         u16 version = readU16(is);
 631         if (version != 1) {
 632                 errorstream << "loadSchematicFile: unsupported schematic "
 633                         "file version" << std::endl;
 634                 return false;
 635         }
 636
 637         size = readV3S16(is);
 638         int nodecount = size.X * size.Y * size.Z;
 639
 640         u16 nidmapcount = readU16(is);
 641
 642         node_names = new std::vector<std::string>;
 643         for (int i = 0; i != nidmapcount; i++) {
 644                 std::string name = deSerializeString(is);
 645                 node_names->push_back(name);
 646         }
 647
 648         delete schematic;
 649         schematic = new MapNode[nodecount];
 650         MapNode::deSerializeBulk(is, SER_FMT_VER_HIGHEST, schematic,
 651                                 nodecount, 2, 2, true);
 652
 653         return true;
 654 }
 655
 656
 657 /*
 658         Minetest Schematic File Format
 659
 660         All values are stored in big-endian byte order.
 661         [u32] signature: 'MTSM'
 662         [u16] version: 1
 663         [u16] size X
 664         [u16] size Y
 665         [u16] size Z
 666         [Name-ID table] Name ID Mapping Table
 667                 [u16] name-id count
 668                 For each name-id mapping:
 669                         [u16] name length
 670                         [u8[]] name
 671         ZLib deflated {
 672         For each node in schematic:  (for z, y, x)
 673                 [u16] content
 674         For each node in schematic:
 675                 [u8] probability of occurance (param1)
 676         For each node in schematic:
 677                 [u8] param2
 678         }
 679 */
 680 void DecoSchematic::saveSchematicFile(INodeDefManager *ndef) {
 681         std::ofstream os(filename.c_str(), std::ios_base::binary);
 682
 683         writeU32(os, 'MTSM'); // signature
 684         writeU16(os, 1);      // version
 685         writeV3S16(os, size); // schematic size
 686
 687         std::vector<content_t> usednodes;
 688         int nodecount = size.X * size.Y * size.Z;
 689         build_nnlist_and_update_ids(schematic, nodecount, &usednodes);
 690
 691         u16 numids = usednodes.size();
 692         writeU16(os, numids); // name count
 693         for (int i = 0; i != numids; i++)
 694                 os << serializeString(ndef->get(usednodes[i]).name); // node names
 695
 696         // compressed bulk node data
 697         MapNode::serializeBulk(os, SER_FMT_VER_HIGHEST, schematic,
 698                                 nodecount, 2, 2, true);
 699 }
 700
 701
 702 void build_nnlist_and_update_ids(MapNode *nodes, u32 nodecount,
 703                                                 std::vector<content_t> *usednodes) {
 704         std::map<content_t, content_t> nodeidmap;
 705         content_t numids = 0;
 706
 707         for (u32 i = 0; i != nodecount; i++) {
 708                 content_t id;
 709                 content_t c = nodes[i].getContent();
 710
 711                 std::map<content_t, content_t>::const_iterator it = nodeidmap.find(c);
 712                 if (it == nodeidmap.end()) {
 713                         id = numids;
 714                         numids++;
 715
 716                         usednodes->push_back(c);
 717                         nodeidmap.insert(std::make_pair(c, id));
 718                 } else {
 719                         id = it->second;
 720                 }
 721                 nodes[i].setContent(id);
 722         }
 723 }
 724
 725
 726 bool DecoSchematic::getSchematicFromMap(Map *map, v3s16 p1, v3s16 p2) {
 727         ManualMapVoxelManipulator *vm = new ManualMapVoxelManipulator(map);
 728
 729         v3s16 bp1 = getNodeBlockPos(p1);
 730         v3s16 bp2 = getNodeBlockPos(p2);
 731         vm->initialEmerge(bp1, bp2);
 732
 733         size = p2 - p1 + 1;
 734         schematic = new MapNode[size.X * size.Y * size.Z];
 735
 736         u32 i = 0;
 737         for (s16 z = p1.Z; z <= p2.Z; z++)
 738         for (s16 y = p1.Y; y <= p2.Y; y++) {
 739                 u32 vi = vm->m_area.index(p1.X, y, z);
 740                 for (s16 x = p1.X; x <= p2.X; x++, i++, vi++) {
 741                         schematic[i] = vm->m_data[vi];
 742                         schematic[i].param1 = 0;
 743                 }
 744         }
 745
 746         delete vm;
 747         return true;
 748 }
 749
 750
 751 void DecoSchematic::applyProbabilities(std::vector<std::pair<v3s16, u8> > *plist, v3s16 p0) {
 752         for (size_t i = 0; i != plist->size(); i++) {
 753                 v3s16 p = (*plist)[i].first - p0;
 754                 int index = p.Z * (size.Y * size.X) + p.Y * size.X + p.X;
 755                 if (index < size.Z * size.Y * size.X)
 756                         schematic[index].param1 = (*plist)[i].second;
 757         }
 758 }
 759
 760
 761 ///////////////////////////////////////////////////////////////////////////////
 762
 763
 764 Mapgen::Mapgen() {
 765         seed        = 0;
 766         water_level = 0;
 767         generating  = false;
 768         id          = -1;
 769         vm          = NULL;
 770         ndef        = NULL;
 771         heightmap   = NULL;
 772         biomemap    = NULL;
 773 }
 774
 775
 776 // Returns Y one under area minimum if not found
 777 s16 Mapgen::findGroundLevelFull(v2s16 p2d) {
 778         v3s16 em = vm->m_area.getExtent();
 779         s16 y_nodes_max = vm->m_area.MaxEdge.Y;
 780         s16 y_nodes_min = vm->m_area.MinEdge.Y;
 781         u32 i = vm->m_area.index(p2d.X, y_nodes_max, p2d.Y);
 782         s16 y;
 783
 784         for (y = y_nodes_max; y >= y_nodes_min; y--) {
 785                 MapNode &n = vm->m_data[i];
 786                 if (ndef->get(n).walkable)
 787                         break;
 788
 789                 vm->m_area.add_y(em, i, -1);
 790         }
 791         return (y >= y_nodes_min) ? y : y_nodes_min - 1;
 792 }
 793
 794
 795 s16 Mapgen::findGroundLevel(v2s16 p2d, s16 ymin, s16 ymax) {
 796         v3s16 em = vm->m_area.getExtent();
 797         u32 i = vm->m_area.index(p2d.X, ymax, p2d.Y);
 798         s16 y;
 799
 800         for (y = ymax; y >= ymin; y--) {
 801                 MapNode &n = vm->m_data[i];
 802                 if (ndef->get(n).walkable)
 803                         break;
 804
 805                 vm->m_area.add_y(em, i, -1);
 806         }
 807         return y;
 808 }
 809
 810
 811 void Mapgen::updateHeightmap(v3s16 nmin, v3s16 nmax) {
 812         if (!heightmap)
 813                 return;
 814
 815         //TimeTaker t("Mapgen::updateHeightmap", NULL, PRECISION_MICRO);
 816         int index = 0;
 817         for (s16 z = nmin.Z; z <= nmax.Z; z++) {
 818                 for (s16 x = nmin.X; x <= nmax.X; x++) {
 819                         s16 y = findGroundLevel(v2s16(x, z), nmin.Y, nmax.Y);
 820                         heightmap[index++] = y;
 821                 }
 822         }
 823         //printf("updateHeightmap: %dus\n", t.stop());
 824 }
 825
 826
 827 void Mapgen::updateLiquid(UniqueQueue<v3s16> *trans_liquid, v3s16 nmin, v3s16 nmax) {
 828         bool isliquid, wasliquid;
 829         v3s16 em  = vm->m_area.getExtent();
 830
 831         for (s16 z = nmin.Z; z <= nmax.Z; z++) {
 832                 for (s16 x = nmin.X; x <= nmax.X; x++) {
 833                         wasliquid = true;
 834
 835                         u32 i = vm->m_area.index(x, nmax.Y, z);
 836                         for (s16 y = nmax.Y; y >= nmin.Y; y--) {
 837                                 isliquid = ndef->get(vm->m_data[i]).isLiquid();
 838
 839                                 // there was a change between liquid and nonliquid, add to queue
 840                                 if (isliquid != wasliquid)
 841                                         trans_liquid->push_back(v3s16(x, y, z));
 842
 843                                 wasliquid = isliquid;
 844                                 vm->m_area.add_y(em, i, -1);
 845                         }
 846                 }
 847         }
 848 }
 849
 850
 851 void Mapgen::setLighting(v3s16 nmin, v3s16 nmax, u8 light) {
 852         ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);
 853         VoxelArea a(nmin, nmax);
 854
 855         for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
 856                 for (int y = a.MinEdge.Y; y <= a.MaxEdge.Y; y++) {
 857                         u32 i = vm->m_area.index(a.MinEdge.X, y, z);
 858                         for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++, i++)
 859                                 vm->m_data[i].param1 = light;
 860                 }
 861         }
 862 }
 863
 864
 865 void Mapgen::lightSpread(VoxelArea &a, v3s16 p, u8 light) {
 866         if (light <= 1 || !a.contains(p))
 867                 return;
 868
 869         u32 vi = vm->m_area.index(p);
 870         MapNode &nn = vm->m_data[vi];
 871
 872         light--;
 873         // should probably compare masked, but doesn't seem to make a difference
 874         if (light <= nn.param1 || !ndef->get(nn).light_propagates)
 875                 return;
 876
 877         nn.param1 = light;
 878
 879         lightSpread(a, p + v3s16(0, 0, 1), light);
 880         lightSpread(a, p + v3s16(0, 1, 0), light);
 881         lightSpread(a, p + v3s16(1, 0, 0), light);
 882         lightSpread(a, p - v3s16(0, 0, 1), light);
 883         lightSpread(a, p - v3s16(0, 1, 0), light);
 884         lightSpread(a, p - v3s16(1, 0, 0), light);
 885 }
 886
 887
 888 void Mapgen::calcLighting(v3s16 nmin, v3s16 nmax) {
 889         VoxelArea a(nmin, nmax);
 890         bool block_is_underground = (water_level >= nmax.Y);
 891
 892         ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);
 893         //TimeTaker t("updateLighting");
 894
 895         // first, send vertical rays of sunshine downward
 896         v3s16 em = vm->m_area.getExtent();
 897         for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
 898                 for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++) {
 899                         // see if we can get a light value from the overtop
 900                         u32 i = vm->m_area.index(x, a.MaxEdge.Y + 1, z);
 901                         if (vm->m_data[i].getContent() == CONTENT_IGNORE) {
 902                                 if (block_is_underground)
 903                                         continue;
 904                         } else if ((vm->m_data[i].param1 & 0x0F) != LIGHT_SUN) {
 905                                 continue;
 906                         }
 907                         vm->m_area.add_y(em, i, -1);
 908
 909                         for (int y = a.MaxEdge.Y; y >= a.MinEdge.Y; y--) {
 910                                 MapNode &n = vm->m_data[i];
 911                                 if (!ndef->get(n).sunlight_propagates)
 912                                         break;
 913                                 n.param1 = LIGHT_SUN;
 914                                 vm->m_area.add_y(em, i, -1);
 915                         }
 916                 }
 917         }
 918
 919         // now spread the sunlight and light up any sources
 920         for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
 921                 for (int y = a.MinEdge.Y; y <= a.MaxEdge.Y; y++) {
 922                         u32 i = vm->m_area.index(a.MinEdge.X, y, z);
 923                         for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++, i++) {
 924                                 MapNode &n = vm->m_data[i];
 925                                 if (n.getContent() == CONTENT_IGNORE ||
 926                                         !ndef->get(n).light_propagates)
 927                                         continue;
 928
 929                                 u8 light_produced = ndef->get(n).light_source & 0x0F;
 930                                 if (light_produced)
 931                                         n.param1 = light_produced;
 932
 933                                 u8 light = n.param1 & 0x0F;
 934                                 if (light) {
 935                                         lightSpread(a, v3s16(x,     y,     z + 1), light);
 936                                         lightSpread(a, v3s16(x,     y + 1, z    ), light);
 937                                         lightSpread(a, v3s16(x + 1, y,     z    ), light);
 938                                         lightSpread(a, v3s16(x,     y,     z - 1), light);
 939                                         lightSpread(a, v3s16(x,     y - 1, z    ), light);
 940                                         lightSpread(a, v3s16(x - 1, y,     z    ), light);
 941                                 }
 942                         }
 943                 }
 944         }
 945
 946         //printf("updateLighting: %dms\n", t.stop());
 947 }
 948
 949
 950 void Mapgen::calcLightingOld(v3s16 nmin, v3s16 nmax) {
 951         enum LightBank banks[2] = {LIGHTBANK_DAY, LIGHTBANK_NIGHT};
 952         VoxelArea a(nmin, nmax);
 953         bool block_is_underground = (water_level > nmax.Y);
 954         bool sunlight = !block_is_underground;
 955
 956         ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);
 957
 958         for (int i = 0; i < 2; i++) {
 959                 enum LightBank bank = banks[i];
 960                 std::set<v3s16> light_sources;
 961                 std::map<v3s16, u8> unlight_from;
 962
 963                 voxalgo::clearLightAndCollectSources(*vm, a, bank, ndef,
 964                                                                                          light_sources, unlight_from);
 965                 voxalgo::propagateSunlight(*vm, a, sunlight, light_sources, ndef);
 966
 967                 vm->unspreadLight(bank, unlight_from, light_sources, ndef);
 968                 vm->spreadLight(bank, light_sources, ndef);
 969         }
 970 }
 971
 972
 973 //////////////////////// Mapgen V6 parameter read/write
 974
 975 bool MapgenV6Params::readParams(Settings *settings) {
 976         freq_desert = settings->getFloat("mgv6_freq_desert");
 977         freq_beach  = settings->getFloat("mgv6_freq_beach");
 978
 979         bool success =
 980                 settings->getNoiseParams("mgv6_np_terrain_base",   np_terrain_base)   &&
 981                 settings->getNoiseParams("mgv6_np_terrain_higher", np_terrain_higher) &&
 982                 settings->getNoiseParams("mgv6_np_steepness",      np_steepness)      &&
 983                 settings->getNoiseParams("mgv6_np_height_select",  np_height_select)  &&
 984                 settings->getNoiseParams("mgv6_np_mud",            np_mud)            &&
 985                 settings->getNoiseParams("mgv6_np_beach",          np_beach)          &&
 986                 settings->getNoiseParams("mgv6_np_biome",          np_biome)          &&
 987                 settings->getNoiseParams("mgv6_np_cave",           np_cave)           &&
 988                 settings->getNoiseParams("mgv6_np_humidity",       np_humidity)       &&
 989                 settings->getNoiseParams("mgv6_np_trees",          np_trees)          &&
 990                 settings->getNoiseParams("mgv6_np_apple_trees",    np_apple_trees);
 991         return success;
 992 }
 993
 994
 995 void MapgenV6Params::writeParams(Settings *settings) {
 996         settings->setFloat("mgv6_freq_desert", freq_desert);
 997         settings->setFloat("mgv6_freq_beach",  freq_beach);
 998
 999         settings->setNoiseParams("mgv6_np_terrain_base",   np_terrain_base);
1000         settings->setNoiseParams("mgv6_np_terrain_higher", np_terrain_higher);
1001         settings->setNoiseParams("mgv6_np_steepness",      np_steepness);
1002         settings->setNoiseParams("mgv6_np_height_select",  np_height_select);
1003         settings->setNoiseParams("mgv6_np_mud",            np_mud);
1004         settings->setNoiseParams("mgv6_np_beach",          np_beach);
1005         settings->setNoiseParams("mgv6_np_biome",          np_biome);
1006         settings->setNoiseParams("mgv6_np_cave",           np_cave);
1007         settings->setNoiseParams("mgv6_np_humidity",       np_humidity);
1008         settings->setNoiseParams("mgv6_np_trees",          np_trees);
1009         settings->setNoiseParams("mgv6_np_apple_trees",    np_apple_trees);
1010 }
1011
1012
1013 bool MapgenV7Params::readParams(Settings *settings) {
1014         bool success =
1015                 settings->getNoiseParams("mgv7_np_terrain_base",    np_terrain_base)    &&
1016                 settings->getNoiseParams("mgv7_np_terrain_alt",     np_terrain_alt)     &&
1017                 settings->getNoiseParams("mgv7_np_terrain_mod",     np_terrain_mod)     &&
1018                 settings->getNoiseParams("mgv7_np_terrain_persist", np_terrain_persist) &&
1019                 settings->getNoiseParams("mgv7_np_height_select",   np_height_select)   &&
1020                 settings->getNoiseParams("mgv7_np_ridge",           np_ridge);
1021         return success;
1022 }
1023
1024
1025 void MapgenV7Params::writeParams(Settings *settings) {
1026         settings->setNoiseParams("mgv7_np_terrain_base",    np_terrain_base);
1027         settings->setNoiseParams("mgv7_np_terrain_alt",     np_terrain_alt);
1028         settings->setNoiseParams("mgv7_np_terrain_mod",     np_terrain_mod);
1029         settings->setNoiseParams("mgv7_np_terrain_persist", np_terrain_persist);
1030         settings->setNoiseParams("mgv7_np_height_select",   np_height_select);
1031         settings->setNoiseParams("mgv7_np_ridge",           np_ridge);
1032 }
1033
1034
1035 /////////////////////////////////// legacy static functions for farmesh
1036
1037 s16 Mapgen::find_ground_level_from_noise(u64 seed, v2s16 p2d, s16 precision) {
1038         //just need to return something
1039         s16 level = 5;
1040         return level;
1041 }
1042
1043
1044 bool Mapgen::get_have_beach(u64 seed, v2s16 p2d) {
1045         double sandnoise = noise2d_perlin(
1046                                 0.2+(float)p2d.X/250, 0.7+(float)p2d.Y/250,
1047                                 seed+59420, 3, 0.50);
1048
1049         return (sandnoise > 0.15);
1050 }
1051
1052
1053 double Mapgen::tree_amount_2d(u64 seed, v2s16 p) {
1054         double noise = noise2d_perlin(
1055                         0.5+(float)p.X/125, 0.5+(float)p.Y/125,
1056                         seed+2, 4, 0.66);
1057         double zeroval = -0.39;
1058         if(noise < zeroval)
1059                 return 0;
1060         else
1061                 return 0.04 * (noise-zeroval) / (1.0-zeroval);
1062 }