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 "serialization.h"
  39 #include "util/serialize.h"
  40 #include "filesys.h"
  41
  42 FlagDesc flagdesc_mapgen[] = {
  43         {"trees",          MG_TREES},
  44         {"caves",          MG_CAVES},
  45         {"dungeons",       MG_DUNGEONS},
  46         {"v6_jungles",     MGV6_JUNGLES},
  47         {"v6_biome_blend", MGV6_BIOME_BLEND},
  48         {"flat",           MG_FLAT},
  49         {"nolight",        MG_NOLIGHT},
  50         {"v6_nomudflow",   MGV6_NOMUDFLOW},
  51         {NULL,             0}
  52 };
  53
  54 FlagDesc flagdesc_ore[] = {
  55         {"absheight",            OREFLAG_ABSHEIGHT},
  56         {"scatter_noisedensity", OREFLAG_DENSITY},
  57         {"claylike_nodeisnt",    OREFLAG_NODEISNT},
  58         {NULL,                   0}
  59 };
  60
  61 FlagDesc flagdesc_deco_schematic[] = {
  62         {"place_center_x", DECO_PLACE_CENTER_X},
  63         {"place_center_y", DECO_PLACE_CENTER_Y},
  64         {"place_center_z", DECO_PLACE_CENTER_Z},
  65         {NULL,             0}
  66 };
  67
  68 FlagDesc flagdesc_gennotify[] = {
  69         {"dungeon",          1 << GENNOTIFY_DUNGEON},
  70         {"temple",           1 << GENNOTIFY_TEMPLE},
  71         {"cave_begin",       1 << GENNOTIFY_CAVE_BEGIN},
  72         {"cave_end",         1 << GENNOTIFY_CAVE_END},
  73         {"large_cave_begin", 1 << GENNOTIFY_LARGECAVE_BEGIN},
  74         {"large_cave_end",   1 << GENNOTIFY_LARGECAVE_END},
  75         {NULL,               0}
  76 };
  77
  78 ///////////////////////////////////////////////////////////////////////////////
  79
  80
  81 Ore *createOre(OreType type) {
  82         switch (type) {
  83                 case ORE_SCATTER:
  84                         return new OreScatter;
  85                 case ORE_SHEET:
  86                         return new OreSheet;
  87                 //case ORE_CLAYLIKE: //TODO: implement this!
  88                 //      return new OreClaylike;
  89                 default:
  90                         return NULL;
  91         }
  92 }
  93
  94
  95 Ore::~Ore() {
  96         delete np;
  97         delete noise;
  98 }
  99
 100
 101 void Ore::resolveNodeNames(INodeDefManager *ndef) {
 102         if (ore == CONTENT_IGNORE) {
 103                 ore = ndef->getId(ore_name);
 104                 if (ore == CONTENT_IGNORE) {
 105                         errorstream << "Ore::resolveNodeNames: ore node '"
 106                                 << ore_name << "' not defined";
 107                         ore = CONTENT_AIR;
 108                         wherein.push_back(CONTENT_AIR);
 109                         return;
 110                 }
 111         }
 112
 113         for (size_t i=0; i != wherein_names.size(); i++) {
 114                 std::string name = wherein_names[i];
 115                 content_t c = ndef->getId(name);
 116                 if (c != CONTENT_IGNORE) {
 117                         wherein.push_back(c);
 118                 }
 119         }
 120 }
 121
 122
 123 void Ore::placeOre(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax) {
 124         int in_range = 0;
 125
 126         in_range |= (nmin.Y <= height_max && nmax.Y >= height_min);
 127         if (flags & OREFLAG_ABSHEIGHT)
 128                 in_range |= (nmin.Y >= -height_max && nmax.Y <= -height_min) << 1;
 129         if (!in_range)
 130                 return;
 131
 132         int ymin, ymax;
 133         if (in_range & ORE_RANGE_MIRROR) {
 134                 ymin = MYMAX(nmin.Y, -height_max);
 135                 ymax = MYMIN(nmax.Y, -height_min);
 136         } else {
 137                 ymin = MYMAX(nmin.Y, height_min);
 138                 ymax = MYMIN(nmax.Y, height_max);
 139         }
 140         if (clust_size >= ymax - ymin + 1)
 141                 return;
 142
 143         nmin.Y = ymin;
 144         nmax.Y = ymax;
 145         generate(mg->vm, mg->seed, blockseed, nmin, nmax);
 146 }
 147
 148
 149 void OreScatter::generate(ManualMapVoxelManipulator *vm, int seed,
 150                                                   u32 blockseed, v3s16 nmin, v3s16 nmax) {
 151         PseudoRandom pr(blockseed);
 152         MapNode n_ore(ore, 0, ore_param2);
 153
 154         int volume = (nmax.X - nmin.X + 1) *
 155                                  (nmax.Y - nmin.Y + 1) *
 156                                  (nmax.Z - nmin.Z + 1);
 157         int csize     = clust_size;
 158         int orechance = (csize * csize * csize) / clust_num_ores;
 159         int nclusters = volume / clust_scarcity;
 160
 161         for (int i = 0; i != nclusters; i++) {
 162                 int x0 = pr.range(nmin.X, nmax.X - csize + 1);
 163                 int y0 = pr.range(nmin.Y, nmax.Y - csize + 1);
 164                 int z0 = pr.range(nmin.Z, nmax.Z - csize + 1);
 165
 166                 if (np && (NoisePerlin3D(np, x0, y0, z0, seed) < nthresh))
 167                         continue;
 168
 169                 for (int z1 = 0; z1 != csize; z1++)
 170                 for (int y1 = 0; y1 != csize; y1++)
 171                 for (int x1 = 0; x1 != csize; x1++) {
 172                         if (pr.range(1, orechance) != 1)
 173                                 continue;
 174
 175                         u32 i = vm->m_area.index(x0 + x1, y0 + y1, z0 + z1);
 176                         for (size_t ii = 0; ii < wherein.size(); ii++)
 177                                 if (vm->m_data[i].getContent() == wherein[ii])
 178                                         vm->m_data[i] = n_ore;
 179                 }
 180         }
 181 }
 182
 183
 184 void OreSheet::generate(ManualMapVoxelManipulator *vm, int seed,
 185                                                 u32 blockseed, v3s16 nmin, v3s16 nmax) {
 186         PseudoRandom pr(blockseed + 4234);
 187         MapNode n_ore(ore, 0, ore_param2);
 188
 189         int max_height = clust_size;
 190         int y_start = pr.range(nmin.Y, nmax.Y - max_height);
 191
 192         if (!noise) {
 193                 int sx = nmax.X - nmin.X + 1;
 194                 int sz = nmax.Z - nmin.Z + 1;
 195                 noise = new Noise(np, 0, sx, sz);
 196         }
 197         noise->seed = seed + y_start;
 198         noise->perlinMap2D(nmin.X, nmin.Z);
 199
 200         int index = 0;
 201         for (int z = nmin.Z; z <= nmax.Z; z++)
 202         for (int x = nmin.X; x <= nmax.X; x++) {
 203                 float noiseval = noise->result[index++];
 204                 if (noiseval < nthresh)
 205                         continue;
 206
 207                 int height = max_height * (1. / pr.range(1, 3));
 208                 int y0 = y_start + np->scale * noiseval; //pr.range(1, 3) - 1;
 209                 int y1 = y0 + height;
 210                 for (int y = y0; y != y1; y++) {
 211                         u32 i = vm->m_area.index(x, y, z);
 212                         if (!vm->m_area.contains(i))
 213                                 continue;
 214
 215                         for (size_t ii = 0; ii < wherein.size(); ii++)
 216                                 if (vm->m_data[i].getContent() == wherein[ii])
 217                                         vm->m_data[i] = n_ore;
 218                 }
 219         }
 220 }
 221
 222
 223 ///////////////////////////////////////////////////////////////////////////////
 224
 225
 226 Decoration *createDecoration(DecorationType type) {
 227         switch (type) {
 228                 case DECO_SIMPLE:
 229                         return new DecoSimple;
 230                 case DECO_SCHEMATIC:
 231                         return new DecoSchematic;
 232                 //case DECO_LSYSTEM:
 233                 //      return new DecoLSystem;
 234                 default:
 235                         return NULL;
 236         }
 237 }
 238
 239
 240 Decoration::Decoration() {
 241         mapseed    = 0;
 242         np         = NULL;
 243         fill_ratio = 0;
 244         sidelen    = 1;
 245 }
 246
 247
 248 Decoration::~Decoration() {
 249         delete np;
 250 }
 251
 252
 253 void Decoration::resolveNodeNames(INodeDefManager *ndef) {
 254         this->ndef = ndef;
 255
 256         if (c_place_on == CONTENT_IGNORE)
 257                 c_place_on = ndef->getId(place_on_name);
 258 }
 259
 260
 261 void Decoration::placeDeco(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax) {
 262         PseudoRandom ps(blockseed + 53);
 263         int carea_size = nmax.X - nmin.X + 1;
 264
 265         // Divide area into parts
 266         if (carea_size % sidelen) {
 267                 errorstream << "Decoration::placeDeco: chunk size is not divisible by "
 268                         "sidelen; setting sidelen to " << carea_size << std::endl;
 269                 sidelen = carea_size;
 270         }
 271
 272         s16 divlen = carea_size / sidelen;
 273         int area = sidelen * sidelen;
 274
 275         for (s16 z0 = 0; z0 < divlen; z0++)
 276         for (s16 x0 = 0; x0 < divlen; x0++) {
 277                 v2s16 p2d_center( // Center position of part of division
 278                         nmin.X + sidelen / 2 + sidelen * x0,
 279                         nmin.Z + sidelen / 2 + sidelen * z0
 280                 );
 281                 v2s16 p2d_min( // Minimum edge of part of division
 282                         nmin.X + sidelen * x0,
 283                         nmin.Z + sidelen * z0
 284                 );
 285                 v2s16 p2d_max( // Maximum edge of part of division
 286                         nmin.X + sidelen + sidelen * x0 - 1,
 287                         nmin.Z + sidelen + sidelen * z0 - 1
 288                 );
 289
 290                 // Amount of decorations
 291                 float nval = np ?
 292                         NoisePerlin2D(np, p2d_center.X, p2d_center.Y, mapseed) :
 293                         fill_ratio;
 294                 u32 deco_count = area * MYMAX(nval, 0.f);
 295
 296                 for (u32 i = 0; i < deco_count; i++) {
 297                         s16 x = ps.range(p2d_min.X, p2d_max.X);
 298                         s16 z = ps.range(p2d_min.Y, p2d_max.Y);
 299
 300                         int mapindex = carea_size * (z - nmin.Z) + (x - nmin.X);
 301
 302                         s16 y = mg->heightmap ?
 303                                         mg->heightmap[mapindex] :
 304                                         mg->findGroundLevel(v2s16(x, z), nmin.Y, nmax.Y);
 305
 306                         if (y < nmin.Y || y > nmax.Y)
 307                                 continue;
 308
 309                         int height = getHeight();
 310                         int max_y = nmax.Y;// + MAP_BLOCKSIZE - 1;
 311                         if (y + 1 + height > max_y) {
 312                                 continue;
 313 #if 0
 314                                 printf("Decoration at (%d %d %d) cut off\n", x, y, z);
 315                                 //add to queue
 316                                 JMutexAutoLock cutofflock(cutoff_mutex);
 317                                 cutoffs.push_back(CutoffData(x, y, z, height));
 318 #endif
 319                         }
 320
 321                         if (mg->biomemap) {
 322                                 std::set<u8>::iterator iter;
 323
 324                                 if (biomes.size()) {
 325                                         iter = biomes.find(mg->biomemap[mapindex]);
 326                                         if (iter == biomes.end())
 327                                                 continue;
 328                                 }
 329                         }
 330
 331                         generate(mg, &ps, max_y, v3s16(x, y, z));
 332                 }
 333         }
 334 }
 335
 336
 337 #if 0
 338 void Decoration::placeCutoffs(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax) {
 339         PseudoRandom pr(blockseed + 53);
 340         std::vector<CutoffData> handled_cutoffs;
 341
 342         // Copy over the cutoffs we're interested in so we don't needlessly hold a lock
 343         {
 344                 JMutexAutoLock cutofflock(cutoff_mutex);
 345                 for (std::list<CutoffData>::iterator i = cutoffs.begin();
 346                         i != cutoffs.end(); ++i) {
 347                         CutoffData cutoff = *i;
 348                         v3s16 p    = cutoff.p;
 349                         s16 height = cutoff.height;
 350                         if (p.X < nmin.X || p.X > nmax.X ||
 351                                 p.Z < nmin.Z || p.Z > nmax.Z)
 352                                 continue;
 353                         if (p.Y + height < nmin.Y || p.Y > nmax.Y)
 354                                 continue;
 355
 356                         handled_cutoffs.push_back(cutoff);
 357                 }
 358         }
 359
 360         // Generate the cutoffs
 361         for (size_t i = 0; i != handled_cutoffs.size(); i++) {
 362                 v3s16 p    = handled_cutoffs[i].p;
 363                 s16 height = handled_cutoffs[i].height;
 364
 365                 if (p.Y + height > nmax.Y) {
 366                         //printf("Decoration at (%d %d %d) cut off again!\n", p.X, p.Y, p.Z);
 367                         cuttoffs.push_back(v3s16(p.X, p.Y, p.Z));
 368                 }
 369
 370                 generate(mg, &pr, nmax.Y, nmin.Y - p.Y, v3s16(p.X, nmin.Y, p.Z));
 371         }
 372
 373         // Remove cutoffs that were handled from the cutoff list
 374         {
 375                 JMutexAutoLock cutofflock(cutoff_mutex);
 376                 for (std::list<CutoffData>::iterator i = cutoffs.begin();
 377                         i != cutoffs.end(); ++i) {
 378
 379                         for (size_t j = 0; j != handled_cutoffs.size(); j++) {
 380                                 CutoffData coff = *i;
 381                                 if (coff.p == handled_cutoffs[j].p)
 382                                         i = cutoffs.erase(i);
 383                         }
 384                 }
 385         }
 386 }
 387 #endif
 388
 389
 390 ///////////////////////////////////////////////////////////////////////////////
 391
 392
 393 void DecoSimple::resolveNodeNames(INodeDefManager *ndef) {
 394         Decoration::resolveNodeNames(ndef);
 395
 396         if (c_deco == CONTENT_IGNORE && !decolist_names.size()) {
 397                 c_deco = ndef->getId(deco_name);
 398                 if (c_deco == CONTENT_IGNORE) {
 399                         errorstream << "DecoSimple::resolveNodeNames: decoration node '"
 400                                 << deco_name << "' not defined" << std::endl;
 401                         c_deco = CONTENT_AIR;
 402                 }
 403         }
 404         if (c_spawnby == CONTENT_IGNORE) {
 405                 c_spawnby = ndef->getId(spawnby_name);
 406                 if (c_spawnby == CONTENT_IGNORE) {
 407                         errorstream << "DecoSimple::resolveNodeNames: spawnby node '"
 408                                 << spawnby_name << "' not defined" << std::endl;
 409                         nspawnby = -1;
 410                         c_spawnby = CONTENT_AIR;
 411                 }
 412         }
 413
 414         if (c_decolist.size())
 415                 return;
 416
 417         for (size_t i = 0; i != decolist_names.size(); i++) {
 418                 content_t c = ndef->getId(decolist_names[i]);
 419                 if (c == CONTENT_IGNORE) {
 420                         errorstream << "DecoSimple::resolveNodeNames: decolist node '"
 421                                 << decolist_names[i] << "' not defined" << std::endl;
 422                         c = CONTENT_AIR;
 423                 }
 424                 c_decolist.push_back(c);
 425         }
 426 }
 427
 428
 429 void DecoSimple::generate(Mapgen *mg, PseudoRandom *pr, s16 max_y, v3s16 p) {
 430         ManualMapVoxelManipulator *vm = mg->vm;
 431
 432         u32 vi = vm->m_area.index(p);
 433         if (vm->m_data[vi].getContent() != c_place_on &&
 434                 c_place_on != CONTENT_IGNORE)
 435                 return;
 436
 437         if (nspawnby != -1) {
 438                 int nneighs = 0;
 439                 v3s16 dirs[8] = { // a Moore neighborhood
 440                         v3s16( 0, 0,  1),
 441                         v3s16( 0, 0, -1),
 442                         v3s16( 1, 0,  0),
 443                         v3s16(-1, 0,  0),
 444                         v3s16( 1, 0,  1),
 445                         v3s16(-1, 0,  1),
 446                         v3s16(-1, 0, -1),
 447                         v3s16( 1, 0, -1)
 448                 };
 449
 450                 for (int i = 0; i != 8; i++) {
 451                         u32 index = vm->m_area.index(p + dirs[i]);
 452                         if (vm->m_area.contains(index) &&
 453                                 vm->m_data[index].getContent() == c_spawnby)
 454                                 nneighs++;
 455                 }
 456
 457                 if (nneighs < nspawnby)
 458                         return;
 459         }
 460
 461         size_t ndecos = c_decolist.size();
 462         content_t c_place = ndecos ? c_decolist[pr->range(0, ndecos - 1)] : c_deco;
 463
 464         s16 height = (deco_height_max > 0) ?
 465                 pr->range(deco_height, deco_height_max) : deco_height;
 466
 467         height = MYMIN(height, max_y - p.Y);
 468
 469         v3s16 em = vm->m_area.getExtent();
 470         for (int i = 0; i < height; i++) {
 471                 vm->m_area.add_y(em, vi, 1);
 472
 473                 content_t c = vm->m_data[vi].getContent();
 474                 if (c != CONTENT_AIR && c != CONTENT_IGNORE)
 475                         break;
 476
 477                 vm->m_data[vi] = MapNode(c_place);
 478         }
 479 }
 480
 481
 482 int DecoSimple::getHeight() {
 483         return (deco_height_max > 0) ? deco_height_max : deco_height;
 484 }
 485
 486
 487 std::string DecoSimple::getName() {
 488         return deco_name;
 489 }
 490
 491
 492 ///////////////////////////////////////////////////////////////////////////////
 493
 494
 495 DecoSchematic::DecoSchematic() {
 496         node_names  = NULL;
 497         schematic   = NULL;
 498         slice_probs = NULL;
 499         flags       = 0;
 500         size        = v3s16(0, 0, 0);
 501 }
 502
 503
 504 DecoSchematic::~DecoSchematic() {
 505         delete node_names;
 506         delete []schematic;
 507         delete []slice_probs;
 508 }
 509
 510
 511 void DecoSchematic::resolveNodeNames(INodeDefManager *ndef) {
 512         Decoration::resolveNodeNames(ndef);
 513
 514         if (filename.empty())
 515                 return;
 516
 517         if (!node_names) {
 518                 errorstream << "DecoSchematic::resolveNodeNames: node name list was "
 519                         "not created" << std::endl;
 520                 return;
 521         }
 522
 523         for (size_t i = 0; i != node_names->size(); i++) {
 524                 std::string name = node_names->at(i);
 525
 526                 std::map<std::string, std::string>::iterator it;
 527                 it = replacements.find(name);
 528                 if (it != replacements.end())
 529                         name = it->second;
 530
 531                 content_t c = ndef->getId(name);
 532                 if (c == CONTENT_IGNORE) {
 533                         errorstream << "DecoSchematic::resolveNodeNames: node '"
 534                                 << name << "' not defined" << std::endl;
 535                         c = CONTENT_AIR;
 536                 }
 537
 538                 c_nodes.push_back(c);
 539         }
 540
 541         for (int i = 0; i != size.X * size.Y * size.Z; i++)
 542                 schematic[i].setContent(c_nodes[schematic[i].getContent()]);
 543
 544         delete node_names;
 545         node_names = NULL;
 546 }
 547
 548
 549 void DecoSchematic::generate(Mapgen *mg, PseudoRandom *pr, s16 max_y, v3s16 p) {
 550         ManualMapVoxelManipulator *vm = mg->vm;
 551
 552         if (flags & DECO_PLACE_CENTER_X)
 553                 p.X -= (size.X + 1) / 2;
 554         if (flags & DECO_PLACE_CENTER_Y)
 555                 p.Y -= (size.Y + 1) / 2;
 556         if (flags & DECO_PLACE_CENTER_Z)
 557                 p.Z -= (size.Z + 1) / 2;
 558
 559         u32 vi = vm->m_area.index(p);
 560         if (vm->m_data[vi].getContent() != c_place_on &&
 561                 c_place_on != CONTENT_IGNORE)
 562                 return;
 563
 564         Rotation rot = (rotation == ROTATE_RAND) ?
 565                 (Rotation)pr->range(ROTATE_0, ROTATE_270) : rotation;
 566
 567         blitToVManip(p, vm, rot, false);
 568 }
 569
 570
 571 int DecoSchematic::getHeight() {
 572         return size.Y;
 573 }
 574
 575
 576 std::string DecoSchematic::getName() {
 577         return filename;
 578 }
 579
 580
 581 void DecoSchematic::blitToVManip(v3s16 p, ManualMapVoxelManipulator *vm,
 582                                                                 Rotation rot, bool force_placement) {
 583         int xstride = 1;
 584         int ystride = size.X;
 585         int zstride = size.X * size.Y;
 586
 587         s16 sx = size.X;
 588         s16 sy = size.Y;
 589         s16 sz = size.Z;
 590
 591         int i_start, i_step_x, i_step_z;
 592         switch (rot) {
 593                 case ROTATE_90:
 594                         i_start  = sx - 1;
 595                         i_step_x = zstride;
 596                         i_step_z = -xstride;
 597                         SWAP(s16, sx, sz);
 598                         break;
 599                 case ROTATE_180:
 600                         i_start  = zstride * (sz - 1) + sx - 1;
 601                         i_step_x = -xstride;
 602                         i_step_z = -zstride;
 603                         break;
 604                 case ROTATE_270:
 605                         i_start  = zstride * (sz - 1);
 606                         i_step_x = -zstride;
 607                         i_step_z = xstride;
 608                         SWAP(s16, sx, sz);
 609                         break;
 610                 default:
 611                         i_start  = 0;
 612                         i_step_x = xstride;
 613                         i_step_z = zstride;
 614         }
 615
 616         s16 y_map = p.Y;
 617         for (s16 y = 0; y != sy; y++) {
 618                 if (slice_probs[y] != MTSCHEM_PROB_ALWAYS &&
 619                         myrand_range(1, 255) > slice_probs[y])
 620                         continue;
 621
 622                 for (s16 z = 0; z != sz; z++) {
 623                         u32 i = z * i_step_z + y * ystride + i_start;
 624                         for (s16 x = 0; x != sx; x++, i += i_step_x) {
 625                                 u32 vi = vm->m_area.index(p.X + x, y_map, p.Z + z);
 626                                 if (!vm->m_area.contains(vi))
 627                                         continue;
 628
 629                                 if (schematic[i].getContent() == CONTENT_IGNORE)
 630                                         continue;
 631
 632                                 if (schematic[i].param1 == MTSCHEM_PROB_NEVER)
 633                                         continue;
 634
 635                                 if (!force_placement) {
 636                                         content_t c = vm->m_data[vi].getContent();
 637                                         if (c != CONTENT_AIR && c != CONTENT_IGNORE)
 638                                                 continue;
 639                                 }
 640
 641                                 if (schematic[i].param1 != MTSCHEM_PROB_ALWAYS &&
 642                                         myrand_range(1, 255) > schematic[i].param1)
 643                                         continue;
 644
 645                                 vm->m_data[vi] = schematic[i];
 646                                 vm->m_data[vi].param1 = 0;
 647
 648                                 if (rot)
 649                                         vm->m_data[vi].rotateAlongYAxis(ndef, rot);
 650                         }
 651                 }
 652                 y_map++;
 653         }
 654 }
 655
 656
 657 void DecoSchematic::placeStructure(Map *map, v3s16 p) {
 658         assert(schematic != NULL);
 659         ManualMapVoxelManipulator *vm = new ManualMapVoxelManipulator(map);
 660
 661         Rotation rot = (rotation == ROTATE_RAND) ?
 662                 (Rotation)myrand_range(ROTATE_0, ROTATE_270) : rotation;
 663
 664         v3s16 s = (rot == ROTATE_90 || rot == ROTATE_270) ?
 665                                 v3s16(size.Z, size.Y, size.X) : size;
 666
 667         if (flags & DECO_PLACE_CENTER_X)
 668                 p.X -= (s.X + 1) / 2;
 669         if (flags & DECO_PLACE_CENTER_Y)
 670                 p.Y -= (s.Y + 1) / 2;
 671         if (flags & DECO_PLACE_CENTER_Z)
 672                 p.Z -= (s.Z + 1) / 2;
 673
 674         v3s16 bp1 = getNodeBlockPos(p);
 675         v3s16 bp2 = getNodeBlockPos(p + s - v3s16(1,1,1));
 676         vm->initialEmerge(bp1, bp2);
 677
 678         blitToVManip(p, vm, rot, true);
 679
 680         std::map<v3s16, MapBlock *> lighting_modified_blocks;
 681         std::map<v3s16, MapBlock *> modified_blocks;
 682         vm->blitBackAll(&modified_blocks);
 683
 684         // TODO: Optimize this by using Mapgen::calcLighting() instead
 685         lighting_modified_blocks.insert(modified_blocks.begin(), modified_blocks.end());
 686         map->updateLighting(lighting_modified_blocks, modified_blocks);
 687
 688         MapEditEvent event;
 689         event.type = MEET_OTHER;
 690         for (std::map<v3s16, MapBlock *>::iterator
 691                 it = modified_blocks.begin();
 692                 it != modified_blocks.end(); ++it)
 693                 event.modified_blocks.insert(it->first);
 694
 695         map->dispatchEvent(&event);
 696 }
 697
 698
 699 bool DecoSchematic::loadSchematicFile() {
 700         content_t cignore = CONTENT_IGNORE;
 701         bool have_cignore = false;
 702
 703         std::ifstream is(filename.c_str(), std::ios_base::binary);
 704
 705         u32 signature = readU32(is);
 706         if (signature != MTSCHEM_FILE_SIGNATURE) {
 707                 errorstream << "loadSchematicFile: invalid schematic "
 708                         "file" << std::endl;
 709                 return false;
 710         }
 711
 712         u16 version = readU16(is);
 713         if (version > MTSCHEM_FILE_VER_HIGHEST_READ) {
 714                 errorstream << "loadSchematicFile: unsupported schematic "
 715                         "file version" << std::endl;
 716                 return false;
 717         }
 718
 719         size = readV3S16(is);
 720
 721         delete []slice_probs;
 722         slice_probs = new u8[size.Y];
 723         if (version >= 3) {
 724                 for (int y = 0; y != size.Y; y++)
 725                         slice_probs[y] = readU8(is);
 726         } else {
 727                 for (int y = 0; y != size.Y; y++)
 728                         slice_probs[y] = MTSCHEM_PROB_ALWAYS;
 729         }
 730
 731         int nodecount = size.X * size.Y * size.Z;
 732
 733         u16 nidmapcount = readU16(is);
 734
 735         node_names = new std::vector<std::string>;
 736         for (int i = 0; i != nidmapcount; i++) {
 737                 std::string name = deSerializeString(is);
 738                 if (name == "ignore") {
 739                         name = "air";
 740                         cignore = i;
 741                         have_cignore = true;
 742                 }
 743                 node_names->push_back(name);
 744         }
 745
 746         delete []schematic;
 747         schematic = new MapNode[nodecount];
 748         MapNode::deSerializeBulk(is, SER_FMT_VER_HIGHEST_READ, schematic,
 749                                 nodecount, 2, 2, true);
 750
 751         if (version == 1) { // fix up the probability values
 752                 for (int i = 0; i != nodecount; i++) {
 753                         if (schematic[i].param1 == 0)
 754                                 schematic[i].param1 = MTSCHEM_PROB_ALWAYS;
 755                         if (have_cignore && schematic[i].getContent() == cignore)
 756                                 schematic[i].param1 = MTSCHEM_PROB_NEVER;
 757                 }
 758         }
 759
 760         return true;
 761 }
 762
 763
 764 /*
 765         Minetest Schematic File Format
 766
 767         All values are stored in big-endian byte order.
 768         [u32] signature: 'MTSM'
 769         [u16] version: 3
 770         [u16] size X
 771         [u16] size Y
 772         [u16] size Z
 773         For each Y:
 774                 [u8] slice probability value
 775         [Name-ID table] Name ID Mapping Table
 776                 [u16] name-id count
 777                 For each name-id mapping:
 778                         [u16] name length
 779                         [u8[]] name
 780         ZLib deflated {
 781         For each node in schematic:  (for z, y, x)
 782                 [u16] content
 783         For each node in schematic:
 784                 [u8] probability of occurance (param1)
 785         For each node in schematic:
 786                 [u8] param2
 787         }
 788
 789         Version changes:
 790         1 - Initial version
 791         2 - Fixed messy never/always place; 0 probability is now never, 0xFF is always
 792         3 - Added y-slice probabilities; this allows for variable height structures
 793 */
 794 void DecoSchematic::saveSchematicFile(INodeDefManager *ndef) {
 795         std::ostringstream ss(std::ios_base::binary);
 796
 797         writeU32(ss, MTSCHEM_FILE_SIGNATURE);         // signature
 798         writeU16(ss, MTSCHEM_FILE_VER_HIGHEST_WRITE); // version
 799         writeV3S16(ss, size);                         // schematic size
 800
 801         for (int y = 0; y != size.Y; y++)             // Y slice probabilities
 802                 writeU8(ss, slice_probs[y]);
 803
 804         std::vector<content_t> usednodes;
 805         int nodecount = size.X * size.Y * size.Z;
 806         build_nnlist_and_update_ids(schematic, nodecount, &usednodes);
 807
 808         u16 numids = usednodes.size();
 809         writeU16(ss, numids); // name count
 810         for (int i = 0; i != numids; i++)
 811                 ss << serializeString(ndef->get(usednodes[i]).name); // node names
 812
 813         // compressed bulk node data
 814         MapNode::serializeBulk(ss, SER_FMT_VER_HIGHEST_WRITE, schematic,
 815                                 nodecount, 2, 2, true);
 816
 817         fs::safeWriteToFile(filename, ss.str());
 818 }
 819
 820
 821 void build_nnlist_and_update_ids(MapNode *nodes, u32 nodecount,
 822                                                 std::vector<content_t> *usednodes) {
 823         std::map<content_t, content_t> nodeidmap;
 824         content_t numids = 0;
 825
 826         for (u32 i = 0; i != nodecount; i++) {
 827                 content_t id;
 828                 content_t c = nodes[i].getContent();
 829
 830                 std::map<content_t, content_t>::const_iterator it = nodeidmap.find(c);
 831                 if (it == nodeidmap.end()) {
 832                         id = numids;
 833                         numids++;
 834
 835                         usednodes->push_back(c);
 836                         nodeidmap.insert(std::make_pair(c, id));
 837                 } else {
 838                         id = it->second;
 839                 }
 840                 nodes[i].setContent(id);
 841         }
 842 }
 843
 844
 845 bool DecoSchematic::getSchematicFromMap(Map *map, v3s16 p1, v3s16 p2) {
 846         ManualMapVoxelManipulator *vm = new ManualMapVoxelManipulator(map);
 847
 848         v3s16 bp1 = getNodeBlockPos(p1);
 849         v3s16 bp2 = getNodeBlockPos(p2);
 850         vm->initialEmerge(bp1, bp2);
 851
 852         size = p2 - p1 + 1;
 853
 854         slice_probs = new u8[size.Y];
 855         for (s16 y = 0; y != size.Y; y++)
 856                 slice_probs[y] = MTSCHEM_PROB_ALWAYS;
 857
 858         schematic = new MapNode[size.X * size.Y * size.Z];
 859
 860         u32 i = 0;
 861         for (s16 z = p1.Z; z <= p2.Z; z++)
 862         for (s16 y = p1.Y; y <= p2.Y; y++) {
 863                 u32 vi = vm->m_area.index(p1.X, y, z);
 864                 for (s16 x = p1.X; x <= p2.X; x++, i++, vi++) {
 865                         schematic[i] = vm->m_data[vi];
 866                         schematic[i].param1 = MTSCHEM_PROB_ALWAYS;
 867                 }
 868         }
 869
 870         delete vm;
 871         return true;
 872 }
 873
 874
 875 void DecoSchematic::applyProbabilities(v3s16 p0,
 876         std::vector<std::pair<v3s16, u8> > *plist,
 877         std::vector<std::pair<s16, u8> > *splist) {
 878
 879         for (size_t i = 0; i != plist->size(); i++) {
 880                 v3s16 p = (*plist)[i].first - p0;
 881                 int index = p.Z * (size.Y * size.X) + p.Y * size.X + p.X;
 882                 if (index < size.Z * size.Y * size.X) {
 883                         u8 prob = (*plist)[i].second;
 884                         schematic[index].param1 = prob;
 885
 886                         // trim unnecessary node names from schematic
 887                         if (prob == MTSCHEM_PROB_NEVER)
 888                                 schematic[index].setContent(CONTENT_AIR);
 889                 }
 890         }
 891
 892         for (size_t i = 0; i != splist->size(); i++) {
 893                 s16 y = (*splist)[i].first - p0.Y;
 894                 slice_probs[y] = (*splist)[i].second;
 895         }
 896 }
 897
 898
 899 ///////////////////////////////////////////////////////////////////////////////
 900
 901
 902 Mapgen::Mapgen() {
 903         seed        = 0;
 904         water_level = 0;
 905         generating  = false;
 906         id          = -1;
 907         vm          = NULL;
 908         ndef        = NULL;
 909         heightmap   = NULL;
 910         biomemap    = NULL;
 911
 912         for (unsigned int i = 0; i != NUM_GEN_NOTIFY; i++)
 913                 gen_notifications[i] = new std::vector<v3s16>;
 914 }
 915
 916
 917 Mapgen::~Mapgen() {
 918         for (unsigned int i = 0; i != NUM_GEN_NOTIFY; i++)
 919                 delete gen_notifications[i];
 920 }
 921
 922
 923 // Returns Y one under area minimum if not found
 924 s16 Mapgen::findGroundLevelFull(v2s16 p2d) {
 925         v3s16 em = vm->m_area.getExtent();
 926         s16 y_nodes_max = vm->m_area.MaxEdge.Y;
 927         s16 y_nodes_min = vm->m_area.MinEdge.Y;
 928         u32 i = vm->m_area.index(p2d.X, y_nodes_max, p2d.Y);
 929         s16 y;
 930
 931         for (y = y_nodes_max; y >= y_nodes_min; y--) {
 932                 MapNode &n = vm->m_data[i];
 933                 if (ndef->get(n).walkable)
 934                         break;
 935
 936                 vm->m_area.add_y(em, i, -1);
 937         }
 938         return (y >= y_nodes_min) ? y : y_nodes_min - 1;
 939 }
 940
 941
 942 s16 Mapgen::findGroundLevel(v2s16 p2d, s16 ymin, s16 ymax) {
 943         v3s16 em = vm->m_area.getExtent();
 944         u32 i = vm->m_area.index(p2d.X, ymax, p2d.Y);
 945         s16 y;
 946
 947         for (y = ymax; y >= ymin; y--) {
 948                 MapNode &n = vm->m_data[i];
 949                 if (ndef->get(n).walkable)
 950                         break;
 951
 952                 vm->m_area.add_y(em, i, -1);
 953         }
 954         return y;
 955 }
 956
 957
 958 void Mapgen::updateHeightmap(v3s16 nmin, v3s16 nmax) {
 959         if (!heightmap)
 960                 return;
 961
 962         //TimeTaker t("Mapgen::updateHeightmap", NULL, PRECISION_MICRO);
 963         int index = 0;
 964         for (s16 z = nmin.Z; z <= nmax.Z; z++) {
 965                 for (s16 x = nmin.X; x <= nmax.X; x++, index++) {
 966                         s16 y = findGroundLevel(v2s16(x, z), nmin.Y, nmax.Y);
 967
 968                         // if the values found are out of range, trust the old heightmap
 969                         if (y == nmax.Y && heightmap[index] > nmax.Y)
 970                                 continue;
 971                         if (y == nmin.Y - 1 && heightmap[index] < nmin.Y)
 972                                 continue;
 973
 974                         heightmap[index] = y;
 975                 }
 976         }
 977         //printf("updateHeightmap: %dus\n", t.stop());
 978 }
 979
 980
 981 void Mapgen::updateLiquid(UniqueQueue<v3s16> *trans_liquid, v3s16 nmin, v3s16 nmax) {
 982         bool isliquid, wasliquid, rare;
 983         v3s16 em  = vm->m_area.getExtent();
 984         rare = g_settings->getBool("liquid_finite");
 985         int rarecnt = 0;
 986
 987         for (s16 z = nmin.Z; z <= nmax.Z; z++) {
 988                 for (s16 x = nmin.X; x <= nmax.X; x++) {
 989                         wasliquid = true;
 990
 991                         u32 i = vm->m_area.index(x, nmax.Y, z);
 992                         for (s16 y = nmax.Y; y >= nmin.Y; y--) {
 993                                 isliquid = ndef->get(vm->m_data[i]).isLiquid();
 994
 995                                 // there was a change between liquid and nonliquid, add to queue. no need to add every with liquid_finite
 996                                 if (isliquid != wasliquid && (!rare || !(rarecnt++ % 36)))
 997                                         trans_liquid->push_back(v3s16(x, y, z));
 998
 999                                 wasliquid = isliquid;
1000                                 vm->m_area.add_y(em, i, -1);
1001                         }
1002                 }
1003         }
1004 }
1005
1006
1007 void Mapgen::setLighting(v3s16 nmin, v3s16 nmax, u8 light) {
1008         ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);
1009         VoxelArea a(nmin, nmax);
1010
1011         for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
1012                 for (int y = a.MinEdge.Y; y <= a.MaxEdge.Y; y++) {
1013                         u32 i = vm->m_area.index(a.MinEdge.X, y, z);
1014                         for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++, i++)
1015                                 vm->m_data[i].param1 = light;
1016                 }
1017         }
1018 }
1019
1020
1021 void Mapgen::lightSpread(VoxelArea &a, v3s16 p, u8 light) {
1022         if (light <= 1 || !a.contains(p))
1023                 return;
1024
1025         u32 vi = vm->m_area.index(p);
1026         MapNode &nn = vm->m_data[vi];
1027
1028         light--;
1029         // should probably compare masked, but doesn't seem to make a difference
1030         if (light <= nn.param1 || !ndef->get(nn).light_propagates)
1031                 return;
1032
1033         nn.param1 = light;
1034
1035         lightSpread(a, p + v3s16(0, 0, 1), light);
1036         lightSpread(a, p + v3s16(0, 1, 0), light);
1037         lightSpread(a, p + v3s16(1, 0, 0), light);
1038         lightSpread(a, p - v3s16(0, 0, 1), light);
1039         lightSpread(a, p - v3s16(0, 1, 0), light);
1040         lightSpread(a, p - v3s16(1, 0, 0), light);
1041 }
1042
1043
1044 void Mapgen::calcLighting(v3s16 nmin, v3s16 nmax) {
1045         VoxelArea a(nmin, nmax);
1046         bool block_is_underground = (water_level >= nmax.Y);
1047
1048         ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);
1049         //TimeTaker t("updateLighting");
1050
1051         // first, send vertical rays of sunshine downward
1052         v3s16 em = vm->m_area.getExtent();
1053         for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
1054                 for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++) {
1055                         // see if we can get a light value from the overtop
1056                         u32 i = vm->m_area.index(x, a.MaxEdge.Y + 1, z);
1057                         if (vm->m_data[i].getContent() == CONTENT_IGNORE) {
1058                                 if (block_is_underground)
1059                                         continue;
1060                         } else if ((vm->m_data[i].param1 & 0x0F) != LIGHT_SUN) {
1061                                 continue;
1062                         }
1063                         vm->m_area.add_y(em, i, -1);
1064
1065                         for (int y = a.MaxEdge.Y; y >= a.MinEdge.Y; y--) {
1066                                 MapNode &n = vm->m_data[i];
1067                                 if (!ndef->get(n).sunlight_propagates)
1068                                         break;
1069                                 n.param1 = LIGHT_SUN;
1070                                 vm->m_area.add_y(em, i, -1);
1071                         }
1072                 }
1073         }
1074
1075         // now spread the sunlight and light up any sources
1076         for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
1077                 for (int y = a.MinEdge.Y; y <= a.MaxEdge.Y; y++) {
1078                         u32 i = vm->m_area.index(a.MinEdge.X, y, z);
1079                         for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++, i++) {
1080                                 MapNode &n = vm->m_data[i];
1081                                 if (n.getContent() == CONTENT_IGNORE ||
1082                                         !ndef->get(n).light_propagates)
1083                                         continue;
1084
1085                                 u8 light_produced = ndef->get(n).light_source & 0x0F;
1086                                 if (light_produced)
1087                                         n.param1 = light_produced;
1088
1089                                 u8 light = n.param1 & 0x0F;
1090                                 if (light) {
1091                                         lightSpread(a, v3s16(x,     y,     z + 1), light - 1);
1092                                         lightSpread(a, v3s16(x,     y + 1, z    ), light - 1);
1093                                         lightSpread(a, v3s16(x + 1, y,     z    ), light - 1);
1094                                         lightSpread(a, v3s16(x,     y,     z - 1), light - 1);
1095                                         lightSpread(a, v3s16(x,     y - 1, z    ), light - 1);
1096                                         lightSpread(a, v3s16(x - 1, y,     z    ), light - 1);
1097                                 }
1098                         }
1099                 }
1100         }
1101
1102         //printf("updateLighting: %dms\n", t.stop());
1103 }
1104
1105
1106 void Mapgen::calcLightingOld(v3s16 nmin, v3s16 nmax) {
1107         enum LightBank banks[2] = {LIGHTBANK_DAY, LIGHTBANK_NIGHT};
1108         VoxelArea a(nmin, nmax);
1109         bool block_is_underground = (water_level > nmax.Y);
1110         bool sunlight = !block_is_underground;
1111
1112         ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);
1113
1114         for (int i = 0; i < 2; i++) {
1115                 enum LightBank bank = banks[i];
1116                 std::set<v3s16> light_sources;
1117                 std::map<v3s16, u8> unlight_from;
1118
1119                 voxalgo::clearLightAndCollectSources(*vm, a, bank, ndef,
1120                                                                                          light_sources, unlight_from);
1121                 voxalgo::propagateSunlight(*vm, a, sunlight, light_sources, ndef);
1122
1123                 vm->unspreadLight(bank, unlight_from, light_sources, ndef);
1124                 vm->spreadLight(bank, light_sources, ndef);
1125         }
1126 }
1127
1128
1129 //////////////////////// Mapgen V6 parameter read/write
1130
1131 bool MapgenV6Params::readParams(Settings *settings) {
1132         freq_desert = settings->getFloat("mgv6_freq_desert");
1133         freq_beach  = settings->getFloat("mgv6_freq_beach");
1134
1135         bool success =
1136                 settings->getNoiseParams("mgv6_np_terrain_base",   np_terrain_base)   &&
1137                 settings->getNoiseParams("mgv6_np_terrain_higher", np_terrain_higher) &&
1138                 settings->getNoiseParams("mgv6_np_steepness",      np_steepness)      &&
1139                 settings->getNoiseParams("mgv6_np_height_select",  np_height_select)  &&
1140                 settings->getNoiseParams("mgv6_np_mud",            np_mud)            &&
1141                 settings->getNoiseParams("mgv6_np_beach",          np_beach)          &&
1142                 settings->getNoiseParams("mgv6_np_biome",          np_biome)          &&
1143                 settings->getNoiseParams("mgv6_np_cave",           np_cave)           &&
1144                 settings->getNoiseParams("mgv6_np_humidity",       np_humidity)       &&
1145                 settings->getNoiseParams("mgv6_np_trees",          np_trees)          &&
1146                 settings->getNoiseParams("mgv6_np_apple_trees",    np_apple_trees);
1147         return success;
1148 }
1149
1150
1151 void MapgenV6Params::writeParams(Settings *settings) {
1152         settings->setFloat("mgv6_freq_desert", freq_desert);
1153         settings->setFloat("mgv6_freq_beach",  freq_beach);
1154
1155         settings->setNoiseParams("mgv6_np_terrain_base",   np_terrain_base);
1156         settings->setNoiseParams("mgv6_np_terrain_higher", np_terrain_higher);
1157         settings->setNoiseParams("mgv6_np_steepness",      np_steepness);
1158         settings->setNoiseParams("mgv6_np_height_select",  np_height_select);
1159         settings->setNoiseParams("mgv6_np_mud",            np_mud);
1160         settings->setNoiseParams("mgv6_np_beach",          np_beach);
1161         settings->setNoiseParams("mgv6_np_biome",          np_biome);
1162         settings->setNoiseParams("mgv6_np_cave",           np_cave);
1163         settings->setNoiseParams("mgv6_np_humidity",       np_humidity);
1164         settings->setNoiseParams("mgv6_np_trees",          np_trees);
1165         settings->setNoiseParams("mgv6_np_apple_trees",    np_apple_trees);
1166 }
1167
1168
1169 bool MapgenV7Params::readParams(Settings *settings) {
1170         bool success =
1171                 settings->getNoiseParams("mgv7_np_terrain_base",    np_terrain_base)    &&
1172                 settings->getNoiseParams("mgv7_np_terrain_alt",     np_terrain_alt)     &&
1173                 settings->getNoiseParams("mgv7_np_terrain_persist", np_terrain_persist) &&
1174                 settings->getNoiseParams("mgv7_np_height_select",   np_height_select)   &&
1175                 settings->getNoiseParams("mgv7_np_filler_depth",    np_filler_depth)    &&
1176                 settings->getNoiseParams("mgv7_np_mount_height",    np_mount_height)    &&
1177                 settings->getNoiseParams("mgv7_np_ridge_uwater",    np_ridge_uwater)    &&
1178                 settings->getNoiseParams("mgv7_np_mountain",        np_mountain)        &&
1179                 settings->getNoiseParams("mgv7_np_ridge",           np_ridge);
1180         return success;
1181 }
1182
1183
1184 void MapgenV7Params::writeParams(Settings *settings) {
1185         settings->setNoiseParams("mgv7_np_terrain_base",    np_terrain_base);
1186         settings->setNoiseParams("mgv7_np_terrain_alt",     np_terrain_alt);
1187         settings->setNoiseParams("mgv7_np_terrain_persist", np_terrain_persist);
1188         settings->setNoiseParams("mgv7_np_height_select",   np_height_select);
1189         settings->setNoiseParams("mgv7_np_filler_depth",    np_filler_depth);
1190         settings->setNoiseParams("mgv7_np_mount_height",    np_mount_height);
1191         settings->setNoiseParams("mgv7_np_ridge_uwater",    np_ridge_uwater);
1192         settings->setNoiseParams("mgv7_np_mountain",        np_mountain);
1193         settings->setNoiseParams("mgv7_np_ridge",           np_ridge);
1194 }