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
  39 FlagDesc flagdesc_mapgen[] = {
  40         {"trees",          MG_TREES},
  41         {"caves",          MG_CAVES},
  42         {"dungeons",       MG_DUNGEONS},
  43         {"v6_jungles",     MGV6_JUNGLES},
  44         {"v6_biome_blend", MGV6_BIOME_BLEND},
  45         {"flat",           MG_FLAT},
  46         {NULL,             0}
  47 };
  48
  49 FlagDesc flagdesc_ore[] = {
  50         {"absheight",            OREFLAG_ABSHEIGHT},
  51         {"scatter_noisedensity", OREFLAG_DENSITY},
  52         {"claylike_nodeisnt",    OREFLAG_NODEISNT},
  53         {NULL,                   0}
  54 };
  55
  56
  57 ///////////////////////////////////////////////////////////////////////////////
  58
  59
  60 Ore *createOre(OreType type) {
  61         switch (type) {
  62                 case ORE_SCATTER:
  63                         return new OreScatter;
  64                 case ORE_SHEET:
  65                         return new OreSheet;
  66                 //case ORE_CLAYLIKE: //TODO: implement this!
  67                 //      return new OreClaylike;
  68                 default:
  69                         return NULL;
  70         }
  71 }
  72
  73
  74 Ore::~Ore() {
  75         delete np;
  76         delete noise;
  77 }
  78
  79
  80 void Ore::resolveNodeNames(INodeDefManager *ndef) {
  81         if (ore == CONTENT_IGNORE) {
  82                 ore = ndef->getId(ore_name);
  83                 if (ore == CONTENT_IGNORE) {
  84                         errorstream << "Ore::resolveNodeNames: ore node '"
  85                                 << ore_name << "' not defined";
  86                         ore     = CONTENT_AIR;
  87                         wherein = CONTENT_AIR;
  88                 }
  89         }
  90
  91         if (wherein == CONTENT_IGNORE) {
  92                 wherein = ndef->getId(wherein_name);
  93                 if (wherein == CONTENT_IGNORE) {
  94                         errorstream << "Ore::resolveNodeNames: wherein node '"
  95                                 << wherein_name << "' not defined";
  96                         ore     = CONTENT_AIR;
  97                         wherein = CONTENT_AIR;
  98                 }
  99         }
 100 }
 101
 102
 103 void Ore::placeOre(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax) {
 104         int in_range = 0;
 105
 106         in_range |= (nmin.Y <= height_max && nmax.Y >= height_min);
 107         if (flags & OREFLAG_ABSHEIGHT)
 108                 in_range |= (nmin.Y >= -height_max && nmax.Y <= -height_min) << 1;
 109         if (!in_range)
 110                 return;
 111
 112         int ymin, ymax;
 113         if (in_range & ORE_RANGE_MIRROR) {
 114                 ymin = MYMAX(nmin.Y, -height_max);
 115                 ymax = MYMIN(nmax.Y, -height_min);
 116         } else {
 117                 ymin = MYMAX(nmin.Y, height_min);
 118                 ymax = MYMIN(nmax.Y, height_max);
 119         }
 120         if (clust_size >= ymax - ymin + 1)
 121                 return;
 122
 123         nmin.Y = ymin;
 124         nmax.Y = ymax;
 125         generate(mg->vm, mg->seed, blockseed, nmin, nmax);
 126 }
 127
 128
 129 void OreScatter::generate(ManualMapVoxelManipulator *vm, int seed,
 130                                                   u32 blockseed, v3s16 nmin, v3s16 nmax) {
 131         PseudoRandom pr(blockseed);
 132         MapNode n_ore(ore, 0, ore_param2);
 133
 134         int volume = (nmax.X - nmin.X + 1) *
 135                                  (nmax.Y - nmin.Y + 1) *
 136                                  (nmax.Z - nmin.Z + 1);
 137         int csize     = clust_size;
 138         int orechance = (csize * csize * csize) / clust_num_ores;
 139         int nclusters = volume / clust_scarcity;
 140
 141         for (int i = 0; i != nclusters; i++) {
 142                 int x0 = pr.range(nmin.X, nmax.X - csize + 1);
 143                 int y0 = pr.range(nmin.Y, nmax.Y - csize + 1);
 144                 int z0 = pr.range(nmin.Z, nmax.Z - csize + 1);
 145
 146                 if (np && (NoisePerlin3D(np, x0, y0, z0, seed) < nthresh))
 147                         continue;
 148
 149                 for (int z1 = 0; z1 != csize; z1++)
 150                 for (int y1 = 0; y1 != csize; y1++)
 151                 for (int x1 = 0; x1 != csize; x1++) {
 152                         if (pr.range(1, orechance) != 1)
 153                                 continue;
 154
 155                         u32 i = vm->m_area.index(x0 + x1, y0 + y1, z0 + z1);
 156                         if (vm->m_data[i].getContent() == wherein)
 157                                 vm->m_data[i] = n_ore;
 158                 }
 159         }
 160 }
 161
 162
 163 void OreSheet::generate(ManualMapVoxelManipulator *vm, int seed,
 164                                                 u32 blockseed, v3s16 nmin, v3s16 nmax) {
 165         PseudoRandom pr(blockseed + 4234);
 166         MapNode n_ore(ore, 0, ore_param2);
 167
 168         int max_height = clust_size;
 169         int y_start = pr.range(nmin.Y, nmax.Y - max_height);
 170
 171         if (!noise) {
 172                 int sx = nmax.X - nmin.X + 1;
 173                 int sz = nmax.Z - nmin.Z + 1;
 174                 noise = new Noise(np, 0, sx, sz);
 175         }
 176         noise->seed = seed + y_start;
 177         noise->perlinMap2D(nmin.X, nmin.Z);
 178
 179         int index = 0;
 180         for (int z = nmin.Z; z <= nmax.Z; z++)
 181         for (int x = nmin.X; x <= nmax.X; x++) {
 182                 float noiseval = noise->result[index++];
 183                 if (noiseval < nthresh)
 184                         continue;
 185
 186                 int height = max_height * (1. / pr.range(1, 3));
 187                 int y0 = y_start + np->scale * noiseval; //pr.range(1, 3) - 1;
 188                 int y1 = y0 + height;
 189                 for (int y = y0; y != y1; y++) {
 190                         u32 i = vm->m_area.index(x, y, z);
 191                         if (!vm->m_area.contains(i))
 192                                 continue;
 193
 194                         if (vm->m_data[i].getContent() == wherein)
 195                                 vm->m_data[i] = n_ore;
 196                 }
 197         }
 198 }
 199
 200
 201 Decoration *createDecoration(DecorationType type) {
 202         switch (type) {
 203                 case DECO_SIMPLE:
 204                         return new DecoSimple;
 205                 //case DECO_SCHEMATIC:
 206                 //      return new DecoSchematic;
 207                 //case DECO_LSYSTEM:
 208                 //      return new DecoLSystem;
 209                 default:
 210                         return NULL;
 211         }
 212 }
 213
 214
 215 Decoration::~Decoration() {
 216         delete np;
 217 }
 218
 219
 220 void Decoration::resolveNodeNames(INodeDefManager *ndef) {
 221         if (c_place_on == CONTENT_IGNORE)
 222                 c_place_on = ndef->getId(place_on_name);
 223 }
 224
 225
 226 void Decoration::placeDeco(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax) {
 227         PseudoRandom ps(blockseed + 53);
 228         int carea_size = nmax.X - nmin.X + 1;
 229
 230         // Divide area into parts
 231         if (carea_size % sidelen) {
 232                 errorstream << "Decoration::placeDeco: chunk size is not divisible by "
 233                         "sidelen; setting sidelen to " << carea_size << std::endl;
 234                 sidelen = carea_size;
 235         }
 236
 237         s16 divlen = carea_size / sidelen;
 238         int area = sidelen * sidelen;
 239
 240         for (s16 z0 = 0; z0 < divlen; z0++)
 241         for (s16 x0 = 0; x0 < divlen; x0++) {
 242                 v2s16 p2d_center( // Center position of part of division
 243                         nmin.X + sidelen / 2 + sidelen * x0,
 244                         nmin.Z + sidelen / 2 + sidelen * z0
 245                 );
 246                 v2s16 p2d_min( // Minimum edge of part of division
 247                         nmin.X + sidelen * x0,
 248                         nmin.Z + sidelen * z0
 249                 );
 250                 v2s16 p2d_max( // Maximum edge of part of division
 251                         nmin.X + sidelen + sidelen * x0 - 1,
 252                         nmin.Z + sidelen + sidelen * z0 - 1
 253                 );
 254
 255                 // Amount of decorations
 256                 float nval = np ?
 257                         NoisePerlin2D(np, p2d_center.X, p2d_center.Y, mapseed) :
 258                         fill_ratio;
 259                 u32 deco_count = area * MYMAX(nval, 0.f);
 260
 261                 for (u32 i = 0; i < deco_count; i++) {
 262                         s16 x = ps.range(p2d_min.X, p2d_max.X);
 263                         s16 z = ps.range(p2d_min.Y, p2d_max.Y);
 264
 265                         int mapindex = carea_size * (z - nmin.Z) + (x - nmin.X);
 266
 267                         s16 y = mg->heightmap ?
 268                                         mg->heightmap[mapindex] :
 269                                         mg->findGroundLevel(v2s16(x, z), nmin.Y, nmax.Y);
 270
 271                         if (y < nmin.Y || y > nmax.Y)
 272                                 continue;
 273
 274                         int height = getHeight();
 275                         int max_y = nmax.Y + MAP_BLOCKSIZE;
 276                         if (y + 1 + height > max_y) {
 277                                 continue;
 278 #if 0
 279                                 printf("Decoration at (%d %d %d) cut off\n", x, y, z);
 280                                 //add to queue
 281                                 JMutexAutoLock cutofflock(cutoff_mutex);
 282                                 cutoffs.push_back(CutoffData(x, y, z, height));
 283 #endif
 284                         }
 285
 286                         if (mg->biomemap) {
 287                                 std::set<u8>::iterator iter;
 288
 289                                 if (biomes.size()) {
 290                                         iter = biomes.find(mg->biomemap[mapindex]);
 291                                         if (iter == biomes.end())
 292                                                 continue;
 293                                 }
 294                         }
 295
 296                         generate(mg, &ps, max_y, 0, v3s16(x, y, z));
 297                 }
 298         }
 299 }
 300
 301
 302 #if 0
 303 void Decoration::placeCutoffs(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax) {
 304         PseudoRandom pr(blockseed + 53);
 305         std::vector<CutoffData> handled_cutoffs;
 306
 307         // Copy over the cutoffs we're interested in so we don't needlessly hold a lock
 308         {
 309                 JMutexAutoLock cutofflock(cutoff_mutex);
 310                 for (std::list<CutoffData>::iterator i = cutoffs.begin();
 311                         i != cutoffs.end(); ++i) {
 312                         CutoffData cutoff = *i;
 313                         v3s16 p    = cutoff.p;
 314                         s16 height = cutoff.height;
 315                         if (p.X < nmin.X || p.X > nmax.X ||
 316                                 p.Z < nmin.Z || p.Z > nmax.Z)
 317                                 continue;
 318                         if (p.Y + height < nmin.Y || p.Y > nmax.Y)
 319                                 continue;
 320
 321                         handled_cutoffs.push_back(cutoff);
 322                 }
 323         }
 324
 325         // Generate the cutoffs
 326         for (size_t i = 0; i != handled_cutoffs.size(); i++) {
 327                 v3s16 p    = handled_cutoffs[i].p;
 328                 s16 height = handled_cutoffs[i].height;
 329
 330                 if (p.Y + height > nmax.Y) {
 331                         //printf("Decoration at (%d %d %d) cut off again!\n", p.X, p.Y, p.Z);
 332                         cuttoffs.push_back(v3s16(p.X, p.Y, p.Z));
 333                 }
 334
 335                 generate(mg, &pr, nmax.Y, nmin.Y - p.Y, v3s16(p.X, nmin.Y, p.Z));
 336         }
 337
 338         // Remove cutoffs that were handled from the cutoff list
 339         {
 340                 JMutexAutoLock cutofflock(cutoff_mutex);
 341                 for (std::list<CutoffData>::iterator i = cutoffs.begin();
 342                         i != cutoffs.end(); ++i) {
 343
 344                         for (size_t j = 0; j != handled_cutoffs.size(); j++) {
 345                                 CutoffData coff = *i;
 346                                 if (coff.p == handled_cutoffs[j].p)
 347                                         i = cutoffs.erase(i);
 348                         }
 349                 }
 350         }
 351 }
 352 #endif
 353
 354
 355 void DecoSimple::resolveNodeNames(INodeDefManager *ndef) {
 356         Decoration::resolveNodeNames(ndef);
 357
 358         if (c_deco == CONTENT_IGNORE) {
 359                 c_deco = ndef->getId(deco_name);
 360                 if (c_deco == CONTENT_IGNORE) {
 361                         errorstream << "DecoSimple::resolveNodeNames: decoration node '"
 362                                 << deco_name << "' not defined";
 363                         c_deco = CONTENT_AIR;
 364                 }
 365         }
 366         if (c_spawnby == CONTENT_IGNORE) {
 367                 c_spawnby = ndef->getId(spawnby_name);
 368                 if (c_spawnby == CONTENT_IGNORE) {
 369                         errorstream << "DecoSimple::resolveNodeNames: spawnby node '"
 370                                 << deco_name << "' not defined";
 371                         nspawnby = -1;
 372                         c_spawnby = CONTENT_AIR;
 373                 }
 374         }
 375
 376         if (c_decolist.size())
 377                 return;
 378
 379         for (size_t i = 0; i != decolist_names.size(); i++) {
 380                 content_t c = ndef->getId(decolist_names[i]);
 381                 if (c == CONTENT_IGNORE) {
 382                         errorstream << "DecoSimple::resolveNodeNames: decolist node '"
 383                                 << decolist_names[i] << "' not defined";
 384                         c = CONTENT_AIR;
 385                 }
 386                 c_decolist.push_back(c);
 387         }
 388 }
 389
 390
 391 void DecoSimple::generate(Mapgen *mg, PseudoRandom *pr, s16 max_y, s16 start_y, v3s16 p) {
 392         ManualMapVoxelManipulator *vm = mg->vm;
 393
 394         u32 vi = vm->m_area.index(p);
 395         if (vm->m_data[vi].getContent() != c_place_on &&
 396                 c_place_on != CONTENT_IGNORE)
 397                 return;
 398
 399         if (nspawnby != -1) {
 400                 int nneighs = 0;
 401                 v3s16 dirs[8] = { // a Moore neighborhood
 402                         v3s16( 0, 0,  1),
 403                         v3s16( 0, 0, -1),
 404                         v3s16( 1, 0,  0),
 405                         v3s16(-1, 0,  0),
 406                         v3s16( 1, 0,  1),
 407                         v3s16(-1, 0,  1),
 408                         v3s16(-1, 0, -1),
 409                         v3s16( 1, 0, -1)
 410                 };
 411
 412                 for (int i = 0; i != 8; i++) {
 413                         u32 index = vm->m_area.index(p + dirs[i]);
 414                         if (vm->m_area.contains(index) &&
 415                                 vm->m_data[index].getContent() == c_spawnby)
 416                                 nneighs++;
 417                 }
 418
 419                 if (nneighs < nspawnby)
 420                         return;
 421         }
 422
 423         size_t ndecos = c_decolist.size();
 424         content_t c_place = ndecos ? c_decolist[pr->range(0, ndecos - 1)] : c_deco;
 425
 426         s16 height = (deco_height_max > 0) ?
 427                 pr->range(deco_height, deco_height_max) : deco_height;
 428
 429         height = MYMIN(height, max_y - p.Y);
 430
 431         v3s16 em = vm->m_area.getExtent();
 432         for (int i = start_y; i < height; i++) {
 433                 vm->m_area.add_y(em, vi, 1);
 434
 435                 content_t c = vm->m_data[vi].getContent();
 436                 if (c != CONTENT_AIR && c != CONTENT_IGNORE)
 437                         break;
 438
 439                 vm->m_data[vi] = MapNode(c_place);
 440         }
 441 }
 442
 443
 444 int DecoSimple::getHeight() {
 445         return (deco_height_max > 0) ? deco_height_max : deco_height;
 446 }
 447
 448
 449 std::string DecoSimple::getName() {
 450         return deco_name;
 451 }
 452
 453
 454 ///////////////////////////////////////////////////////////////////////////////
 455
 456
 457 Mapgen::Mapgen() {
 458         seed        = 0;
 459         water_level = 0;
 460         generating  = false;
 461         id          = -1;
 462         vm          = NULL;
 463         ndef        = NULL;
 464         heightmap   = NULL;
 465         biomemap    = NULL;
 466 }
 467
 468
 469 // Returns Y one under area minimum if not found
 470 s16 Mapgen::findGroundLevelFull(v2s16 p2d) {
 471         v3s16 em = vm->m_area.getExtent();
 472         s16 y_nodes_max = vm->m_area.MaxEdge.Y;
 473         s16 y_nodes_min = vm->m_area.MinEdge.Y;
 474         u32 i = vm->m_area.index(p2d.X, y_nodes_max, p2d.Y);
 475         s16 y;
 476
 477         for (y = y_nodes_max; y >= y_nodes_min; y--) {
 478                 MapNode &n = vm->m_data[i];
 479                 if (ndef->get(n).walkable)
 480                         break;
 481
 482                 vm->m_area.add_y(em, i, -1);
 483         }
 484         return (y >= y_nodes_min) ? y : y_nodes_min - 1;
 485 }
 486
 487
 488 s16 Mapgen::findGroundLevel(v2s16 p2d, s16 ymin, s16 ymax) {
 489         v3s16 em = vm->m_area.getExtent();
 490         u32 i = vm->m_area.index(p2d.X, ymax, p2d.Y);
 491         s16 y;
 492
 493         for (y = ymax; y >= ymin; y--) {
 494                 MapNode &n = vm->m_data[i];
 495                 if (ndef->get(n).walkable)
 496                         break;
 497
 498                 vm->m_area.add_y(em, i, -1);
 499         }
 500         return y;
 501 }
 502
 503
 504 void Mapgen::updateHeightmap(v3s16 nmin, v3s16 nmax) {
 505         if (!heightmap)
 506                 return;
 507
 508         //TimeTaker t("Mapgen::updateHeightmap", NULL, PRECISION_MICRO);
 509         int index = 0;
 510         for (s16 z = nmin.Z; z <= nmax.Z; z++) {
 511                 for (s16 x = nmin.X; x <= nmax.X; x++) {
 512                         s16 y = findGroundLevel(v2s16(x, z), nmin.Y, nmax.Y);
 513                         heightmap[index++] = y;
 514                 }
 515         }
 516         //printf("updateHeightmap: %dus\n", t.stop());
 517 }
 518
 519
 520 void Mapgen::updateLiquid(UniqueQueue<v3s16> *trans_liquid, v3s16 nmin, v3s16 nmax) {
 521         bool isliquid, wasliquid;
 522         v3s16 em  = vm->m_area.getExtent();
 523
 524         for (s16 z = nmin.Z; z <= nmax.Z; z++) {
 525                 for (s16 x = nmin.X; x <= nmax.X; x++) {
 526                         wasliquid = true;
 527
 528                         u32 i = vm->m_area.index(x, nmax.Y, z);
 529                         for (s16 y = nmax.Y; y >= nmin.Y; y--) {
 530                                 isliquid = ndef->get(vm->m_data[i]).isLiquid();
 531
 532                                 // there was a change between liquid and nonliquid, add to queue
 533                                 if (isliquid != wasliquid)
 534                                         trans_liquid->push_back(v3s16(x, y, z));
 535
 536                                 wasliquid = isliquid;
 537                                 vm->m_area.add_y(em, i, -1);
 538                         }
 539                 }
 540         }
 541 }
 542
 543
 544 void Mapgen::setLighting(v3s16 nmin, v3s16 nmax, u8 light) {
 545         ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);
 546         VoxelArea a(nmin, nmax);
 547
 548         for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
 549                 for (int y = a.MinEdge.Y; y <= a.MaxEdge.Y; y++) {
 550                         u32 i = vm->m_area.index(a.MinEdge.X, y, z);
 551                         for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++, i++)
 552                                 vm->m_data[i].param1 = light;
 553                 }
 554         }
 555 }
 556
 557
 558 void Mapgen::lightSpread(VoxelArea &a, v3s16 p, u8 light) {
 559         if (light <= 1 || !a.contains(p))
 560                 return;
 561
 562         u32 vi = vm->m_area.index(p);
 563         MapNode &nn = vm->m_data[vi];
 564
 565         light--;
 566         // should probably compare masked, but doesn't seem to make a difference
 567         if (light <= nn.param1 || !ndef->get(nn).light_propagates)
 568                 return;
 569
 570         nn.param1 = light;
 571
 572         lightSpread(a, p + v3s16(0, 0, 1), light);
 573         lightSpread(a, p + v3s16(0, 1, 0), light);
 574         lightSpread(a, p + v3s16(1, 0, 0), light);
 575         lightSpread(a, p - v3s16(0, 0, 1), light);
 576         lightSpread(a, p - v3s16(0, 1, 0), light);
 577         lightSpread(a, p - v3s16(1, 0, 0), light);
 578 }
 579
 580
 581 void Mapgen::calcLighting(v3s16 nmin, v3s16 nmax) {
 582         VoxelArea a(nmin, nmax);
 583         bool block_is_underground = (water_level >= nmax.Y);
 584
 585         ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);
 586         //TimeTaker t("updateLighting");
 587
 588         // first, send vertical rays of sunshine downward
 589         v3s16 em = vm->m_area.getExtent();
 590         for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
 591                 for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++) {
 592                         // see if we can get a light value from the overtop
 593                         u32 i = vm->m_area.index(x, a.MaxEdge.Y + 1, z);
 594                         if (vm->m_data[i].getContent() == CONTENT_IGNORE) {
 595                                 if (block_is_underground)
 596                                         continue;
 597                         } else if ((vm->m_data[i].param1 & 0x0F) != LIGHT_SUN) {
 598                                 continue;
 599                         }
 600                         vm->m_area.add_y(em, i, -1);
 601
 602                         for (int y = a.MaxEdge.Y; y >= a.MinEdge.Y; y--) {
 603                                 MapNode &n = vm->m_data[i];
 604                                 if (!ndef->get(n).sunlight_propagates)
 605                                         break;
 606                                 n.param1 = LIGHT_SUN;
 607                                 vm->m_area.add_y(em, i, -1);
 608                         }
 609                 }
 610         }
 611
 612         // now spread the sunlight and light up any sources
 613         for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
 614                 for (int y = a.MinEdge.Y; y <= a.MaxEdge.Y; y++) {
 615                         u32 i = vm->m_area.index(a.MinEdge.X, y, z);
 616                         for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++, i++) {
 617                                 MapNode &n = vm->m_data[i];
 618                                 if (n.getContent() == CONTENT_IGNORE ||
 619                                         !ndef->get(n).light_propagates)
 620                                         continue;
 621
 622                                 u8 light_produced = ndef->get(n).light_source & 0x0F;
 623                                 if (light_produced)
 624                                         n.param1 = light_produced;
 625
 626                                 u8 light = n.param1 & 0x0F;
 627                                 if (light) {
 628                                         lightSpread(a, v3s16(x,     y,     z + 1), light);
 629                                         lightSpread(a, v3s16(x,     y + 1, z    ), light);
 630                                         lightSpread(a, v3s16(x + 1, y,     z    ), light);
 631                                         lightSpread(a, v3s16(x,     y,     z - 1), light);
 632                                         lightSpread(a, v3s16(x,     y - 1, z    ), light);
 633                                         lightSpread(a, v3s16(x - 1, y,     z    ), light);
 634                                 }
 635                         }
 636                 }
 637         }
 638
 639         //printf("updateLighting: %dms\n", t.stop());
 640 }
 641
 642
 643 void Mapgen::calcLightingOld(v3s16 nmin, v3s16 nmax) {
 644         enum LightBank banks[2] = {LIGHTBANK_DAY, LIGHTBANK_NIGHT};
 645         VoxelArea a(nmin, nmax);
 646         bool block_is_underground = (water_level > nmax.Y);
 647         bool sunlight = !block_is_underground;
 648
 649         ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);
 650
 651         for (int i = 0; i < 2; i++) {
 652                 enum LightBank bank = banks[i];
 653                 std::set<v3s16> light_sources;
 654                 std::map<v3s16, u8> unlight_from;
 655
 656                 voxalgo::clearLightAndCollectSources(*vm, a, bank, ndef,
 657                                                                                          light_sources, unlight_from);
 658                 voxalgo::propagateSunlight(*vm, a, sunlight, light_sources, ndef);
 659
 660                 vm->unspreadLight(bank, unlight_from, light_sources, ndef);
 661                 vm->spreadLight(bank, light_sources, ndef);
 662         }
 663 }
 664
 665
 666 //////////////////////// Mapgen V6 parameter read/write
 667
 668 bool MapgenV6Params::readParams(Settings *settings) {
 669         freq_desert = settings->getFloat("mgv6_freq_desert");
 670         freq_beach  = settings->getFloat("mgv6_freq_beach");
 671
 672         bool success =
 673                 settings->getNoiseParams("mgv6_np_terrain_base",   np_terrain_base)   &&
 674                 settings->getNoiseParams("mgv6_np_terrain_higher", np_terrain_higher) &&
 675                 settings->getNoiseParams("mgv6_np_steepness",      np_steepness)      &&
 676                 settings->getNoiseParams("mgv6_np_height_select",  np_height_select)  &&
 677                 settings->getNoiseParams("mgv6_np_mud",            np_mud)            &&
 678                 settings->getNoiseParams("mgv6_np_beach",          np_beach)          &&
 679                 settings->getNoiseParams("mgv6_np_biome",          np_biome)          &&
 680                 settings->getNoiseParams("mgv6_np_cave",           np_cave)           &&
 681                 settings->getNoiseParams("mgv6_np_humidity",       np_humidity)       &&
 682                 settings->getNoiseParams("mgv6_np_trees",          np_trees)          &&
 683                 settings->getNoiseParams("mgv6_np_apple_trees",    np_apple_trees);
 684         return success;
 685 }
 686
 687
 688 void MapgenV6Params::writeParams(Settings *settings) {
 689         settings->setFloat("mgv6_freq_desert", freq_desert);
 690         settings->setFloat("mgv6_freq_beach",  freq_beach);
 691
 692         settings->setNoiseParams("mgv6_np_terrain_base",   np_terrain_base);
 693         settings->setNoiseParams("mgv6_np_terrain_higher", np_terrain_higher);
 694         settings->setNoiseParams("mgv6_np_steepness",      np_steepness);
 695         settings->setNoiseParams("mgv6_np_height_select",  np_height_select);
 696         settings->setNoiseParams("mgv6_np_mud",            np_mud);
 697         settings->setNoiseParams("mgv6_np_beach",          np_beach);
 698         settings->setNoiseParams("mgv6_np_biome",          np_biome);
 699         settings->setNoiseParams("mgv6_np_cave",           np_cave);
 700         settings->setNoiseParams("mgv6_np_humidity",       np_humidity);
 701         settings->setNoiseParams("mgv6_np_trees",          np_trees);
 702         settings->setNoiseParams("mgv6_np_apple_trees",    np_apple_trees);
 703 }
 704
 705
 706 bool MapgenV7Params::readParams(Settings *settings) {
 707         bool success =
 708                 settings->getNoiseParams("mgv7_np_terrain_base",    np_terrain_base)    &&
 709                 settings->getNoiseParams("mgv7_np_terrain_alt",     np_terrain_alt)     &&
 710                 settings->getNoiseParams("mgv7_np_terrain_mod",     np_terrain_mod)     &&
 711                 settings->getNoiseParams("mgv7_np_terrain_persist", np_terrain_persist) &&
 712                 settings->getNoiseParams("mgv7_np_height_select",   np_height_select)   &&
 713                 settings->getNoiseParams("mgv7_np_ridge",           np_ridge);
 714         return success;
 715 }
 716
 717
 718 void MapgenV7Params::writeParams(Settings *settings) {
 719         settings->setNoiseParams("mgv7_np_terrain_base",    np_terrain_base);
 720         settings->setNoiseParams("mgv7_np_terrain_alt",     np_terrain_alt);
 721         settings->setNoiseParams("mgv7_np_terrain_mod",     np_terrain_mod);
 722         settings->setNoiseParams("mgv7_np_terrain_persist", np_terrain_persist);
 723         settings->setNoiseParams("mgv7_np_height_select",   np_height_select);
 724         settings->setNoiseParams("mgv7_np_ridge",           np_ridge);
 725 }
 726
 727
 728 /////////////////////////////////// legacy static functions for farmesh
 729
 730 s16 Mapgen::find_ground_level_from_noise(u64 seed, v2s16 p2d, s16 precision) {
 731         //just need to return something
 732         s16 level = 5;
 733         return level;
 734 }
 735
 736
 737 bool Mapgen::get_have_beach(u64 seed, v2s16 p2d) {
 738         double sandnoise = noise2d_perlin(
 739                                 0.2+(float)p2d.X/250, 0.7+(float)p2d.Y/250,
 740                                 seed+59420, 3, 0.50);
 741
 742         return (sandnoise > 0.15);
 743 }
 744
 745
 746 double Mapgen::tree_amount_2d(u64 seed, v2s16 p) {
 747         double noise = noise2d_perlin(
 748                         0.5+(float)p.X/125, 0.5+(float)p.Y/125,
 749                         seed+2, 4, 0.66);
 750         double zeroval = -0.39;
 751         if(noise < zeroval)
 752                 return 0;
 753         else
 754                 return 0.04 * (noise-zeroval) / (1.0-zeroval);
 755 }