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 void Ore::resolveNodeNames(INodeDefManager *ndef) {
  75         if (ore == CONTENT_IGNORE) {
  76                 ore = ndef->getId(ore_name);
  77                 if (ore == CONTENT_IGNORE) {
  78                         errorstream << "Ore::resolveNodeNames: ore node '"
  79                                 << ore_name << "' not defined";
  80                         ore     = CONTENT_AIR;
  81                         wherein = CONTENT_AIR;
  82                 }
  83         }
  84
  85         if (wherein == CONTENT_IGNORE) {
  86                 wherein = ndef->getId(wherein_name);
  87                 if (wherein == CONTENT_IGNORE) {
  88                         errorstream << "Ore::resolveNodeNames: wherein node '"
  89                                 << wherein_name << "' not defined";
  90                         ore     = CONTENT_AIR;
  91                         wherein = CONTENT_AIR;
  92                 }
  93         }
  94 }
  95
  96
  97 void OreScatter::generate(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax) {
  98         int in_range = 0;
  99
 100         in_range |= (nmin.Y <= height_max && nmax.Y >= height_min);
 101         if (flags & OREFLAG_ABSHEIGHT)
 102                 in_range |= (nmin.Y >= -height_max && nmax.Y <= -height_min) << 1;
 103         if (!in_range)
 104                 return;
 105
 106         resolveNodeNames(mg->ndef);
 107
 108         MapNode n_ore(ore);
 109         ManualMapVoxelManipulator *vm = mg->vm;
 110         PseudoRandom pr(blockseed);
 111         int ymin, ymax;
 112
 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         int volume = (nmax.X - nmin.X + 1) *
 124                                  (nmax.Y - nmin.Y + 1) *
 125                                  (nmax.Z - nmin.Z + 1);
 126         int csize     = clust_size;
 127         int orechance = (csize * csize * csize) / clust_num_ores;
 128         int nclusters = volume / clust_scarcity;
 129
 130         for (int i = 0; i != nclusters; i++) {
 131                 int x0 = pr.range(nmin.X, nmax.X - csize + 1);
 132                 int y0 = pr.range(ymin,   ymax   - csize + 1);
 133                 int z0 = pr.range(nmin.Z, nmax.Z - csize + 1);
 134
 135                 if (np && (NoisePerlin3D(np, x0, y0, z0, mg->seed) < nthresh))
 136                         continue;
 137
 138                 for (int z1 = 0; z1 != csize; z1++)
 139                 for (int y1 = 0; y1 != csize; y1++)
 140                 for (int x1 = 0; x1 != csize; x1++) {
 141                         if (pr.range(1, orechance) != 1)
 142                                 continue;
 143
 144                         u32 i = vm->m_area.index(x0 + x1, y0 + y1, z0 + z1);
 145                         if (vm->m_data[i].getContent() == wherein)
 146                                 vm->m_data[i] = n_ore;
 147                 }
 148         }
 149 }
 150
 151
 152 void OreSheet::generate(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax) {
 153         int in_range = 0;
 154
 155         in_range |= (nmin.Y <= height_max && nmax.Y >= height_min);
 156         if (flags & OREFLAG_ABSHEIGHT)
 157                 in_range |= (nmin.Y >= -height_max && nmax.Y <= -height_min) << 1;
 158         if (!in_range)
 159                 return;
 160
 161         resolveNodeNames(mg->ndef);
 162
 163         MapNode n_ore(ore);
 164         ManualMapVoxelManipulator *vm = mg->vm;
 165         PseudoRandom pr(blockseed + 4234);
 166         int ymin, ymax;
 167
 168         if (in_range & ORE_RANGE_MIRROR) {
 169                 ymin = MYMAX(nmin.Y, -height_max);
 170                 ymax = MYMIN(nmax.Y, -height_min);
 171         } else {
 172                 ymin = MYMAX(nmin.Y, height_min);
 173                 ymax = MYMIN(nmax.Y, height_max);
 174         }
 175
 176         if (clust_size >= ymax - ymin + 1)
 177                 return;
 178
 179         int x0 = nmin.X;
 180         int z0 = nmin.Z;
 181
 182         int x1 = nmax.X;
 183         int z1 = nmax.Z;
 184
 185         int max_height = clust_size;
 186         int y_start = pr.range(ymin, ymax - max_height);
 187
 188         if (!noise) {
 189                 int sx = nmax.X - nmin.X + 1;
 190                 int sz = nmax.Z - nmin.Z + 1;
 191                 noise = new Noise(np, 0, sx, sz);
 192         }
 193         noise->seed = mg->seed + y_start;
 194         noise->perlinMap2D(x0, z0);
 195
 196         int index = 0;
 197         for (int z = z0; z != z1; z++)
 198         for (int x = x0; x != x1; x++) {
 199                 float noiseval = noise->result[index++];
 200                 if (noiseval < nthresh)
 201                         continue;
 202
 203                 int height = max_height * (1. / pr.range(1, 3));
 204                 int y0 = y_start + np->scale * noiseval; //pr.range(1, 3) - 1;
 205                 int y1 = y0 + height;
 206                 for (int y = y0; y != y1; y++) {
 207                         u32 i = vm->m_area.index(x, y, z);
 208                         if (!vm->m_area.contains(i))
 209                                 continue;
 210
 211                         if (vm->m_data[i].getContent() == wherein)
 212                                 vm->m_data[i] = n_ore;
 213                 }
 214         }
 215 }
 216
 217
 218 void Mapgen::updateLiquid(UniqueQueue<v3s16> *trans_liquid, v3s16 nmin, v3s16 nmax) {
 219         bool isliquid, wasliquid;
 220         v3s16 em  = vm->m_area.getExtent();
 221
 222         for (s16 z = nmin.Z; z <= nmax.Z; z++) {
 223                 for (s16 x = nmin.X; x <= nmax.X; x++) {
 224                         wasliquid = true;
 225
 226                         u32 i = vm->m_area.index(x, nmax.Y, z);
 227                         for (s16 y = nmax.Y; y >= nmin.Y; y--) {
 228                                 isliquid = ndef->get(vm->m_data[i]).isLiquid();
 229
 230                                 // there was a change between liquid and nonliquid, add to queue
 231                                 if (isliquid != wasliquid)
 232                                         trans_liquid->push_back(v3s16(x, y, z));
 233
 234                                 wasliquid = isliquid;
 235                                 vm->m_area.add_y(em, i, -1);
 236                         }
 237                 }
 238         }
 239 }
 240
 241
 242 void Mapgen::setLighting(v3s16 nmin, v3s16 nmax, u8 light) {
 243         ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);
 244         VoxelArea a(nmin, nmax);
 245
 246         for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
 247                 for (int y = a.MinEdge.Y; y <= a.MaxEdge.Y; y++) {
 248                         u32 i = vm->m_area.index(a.MinEdge.X, y, z);
 249                         for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++, i++)
 250                                 vm->m_data[i].param1 = light;
 251                 }
 252         }
 253 }
 254
 255
 256 void Mapgen::lightSpread(VoxelArea &a, v3s16 p, u8 light) {
 257         if (light <= 1 || !a.contains(p))
 258                 return;
 259
 260         u32 vi = vm->m_area.index(p);
 261         MapNode &nn = vm->m_data[vi];
 262
 263         light--;
 264         // should probably compare masked, but doesn't seem to make a difference
 265         if (light <= nn.param1 || !ndef->get(nn).light_propagates)
 266                 return;
 267
 268         nn.param1 = light;
 269
 270         lightSpread(a, p + v3s16(0, 0, 1), light);
 271         lightSpread(a, p + v3s16(0, 1, 0), light);
 272         lightSpread(a, p + v3s16(1, 0, 0), light);
 273         lightSpread(a, p - v3s16(0, 0, 1), light);
 274         lightSpread(a, p - v3s16(0, 1, 0), light);
 275         lightSpread(a, p - v3s16(1, 0, 0), light);
 276 }
 277
 278
 279 void Mapgen::calcLighting(v3s16 nmin, v3s16 nmax) {
 280         VoxelArea a(nmin, nmax);
 281         bool block_is_underground = (water_level >= nmax.Y);
 282
 283         ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);
 284         //TimeTaker t("updateLighting");
 285
 286         // first, send vertical rays of sunshine downward
 287         v3s16 em = vm->m_area.getExtent();
 288         for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
 289                 for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++) {
 290                         // see if we can get a light value from the overtop
 291                         u32 i = vm->m_area.index(x, a.MaxEdge.Y + 1, z);
 292                         if (vm->m_data[i].getContent() == CONTENT_IGNORE) {
 293                                 if (block_is_underground)
 294                                         continue;
 295                         } else if ((vm->m_data[i].param1 & 0x0F) != LIGHT_SUN) {
 296                                 continue;
 297                         }
 298                         vm->m_area.add_y(em, i, -1);
 299
 300                         for (int y = a.MaxEdge.Y; y >= a.MinEdge.Y; y--) {
 301                                 MapNode &n = vm->m_data[i];
 302                                 if (!ndef->get(n).sunlight_propagates)
 303                                         break;
 304                                 n.param1 = LIGHT_SUN;
 305                                 vm->m_area.add_y(em, i, -1);
 306                         }
 307                 }
 308         }
 309
 310         // now spread the sunlight and light up any sources
 311         for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
 312                 for (int y = a.MinEdge.Y; y <= a.MaxEdge.Y; y++) {
 313                         u32 i = vm->m_area.index(a.MinEdge.X, y, z);
 314                         for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++, i++) {
 315                                 MapNode &n = vm->m_data[i];
 316                                 if (n.getContent() == CONTENT_IGNORE ||
 317                                         !ndef->get(n).light_propagates)
 318                                         continue;
 319
 320                                 u8 light_produced = ndef->get(n).light_source & 0x0F;
 321                                 if (light_produced)
 322                                         n.param1 = light_produced;
 323
 324                                 u8 light = n.param1 & 0x0F;
 325                                 if (light) {
 326                                         lightSpread(a, v3s16(x,     y,     z + 1), light);
 327                                         lightSpread(a, v3s16(x,     y + 1, z    ), light);
 328                                         lightSpread(a, v3s16(x + 1, y,     z    ), light);
 329                                         lightSpread(a, v3s16(x,     y,     z - 1), light);
 330                                         lightSpread(a, v3s16(x,     y - 1, z    ), light);
 331                                         lightSpread(a, v3s16(x - 1, y,     z    ), light);
 332                                 }
 333                         }
 334                 }
 335         }
 336
 337         //printf("updateLighting: %dms\n", t.stop());
 338 }
 339
 340
 341 void Mapgen::calcLightingOld(v3s16 nmin, v3s16 nmax) {
 342         enum LightBank banks[2] = {LIGHTBANK_DAY, LIGHTBANK_NIGHT};
 343         VoxelArea a(nmin, nmax);
 344         bool block_is_underground = (water_level > nmax.Y);
 345         bool sunlight = !block_is_underground;
 346
 347         ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);
 348
 349         for (int i = 0; i < 2; i++) {
 350                 enum LightBank bank = banks[i];
 351                 std::set<v3s16> light_sources;
 352                 std::map<v3s16, u8> unlight_from;
 353
 354                 voxalgo::clearLightAndCollectSources(*vm, a, bank, ndef,
 355                                         light_sources, unlight_from);
 356                 voxalgo::propagateSunlight(*vm, a, sunlight, light_sources, ndef);
 357
 358                 vm->unspreadLight(bank, unlight_from, light_sources, ndef);
 359                 vm->spreadLight(bank, light_sources, ndef);
 360         }
 361 }
 362
 363
 364 //////////////////////// Mapgen V6 parameter read/write
 365
 366 bool MapgenV6Params::readParams(Settings *settings) {
 367         freq_desert = settings->getFloat("mgv6_freq_desert");
 368         freq_beach  = settings->getFloat("mgv6_freq_beach");
 369
 370         np_terrain_base   = settings->getNoiseParams("mgv6_np_terrain_base");
 371         np_terrain_higher = settings->getNoiseParams("mgv6_np_terrain_higher");
 372         np_steepness      = settings->getNoiseParams("mgv6_np_steepness");
 373         np_height_select  = settings->getNoiseParams("mgv6_np_height_select");
 374         np_mud            = settings->getNoiseParams("mgv6_np_mud");
 375         np_beach          = settings->getNoiseParams("mgv6_np_beach");
 376         np_biome          = settings->getNoiseParams("mgv6_np_biome");
 377         np_cave           = settings->getNoiseParams("mgv6_np_cave");
 378         np_humidity       = settings->getNoiseParams("mgv6_np_humidity");
 379         np_trees          = settings->getNoiseParams("mgv6_np_trees");
 380         np_apple_trees    = settings->getNoiseParams("mgv6_np_apple_trees");
 381
 382         bool success =
 383                 np_terrain_base  && np_terrain_higher && np_steepness &&
 384                 np_height_select && np_trees          && np_mud       &&
 385                 np_beach         && np_biome          && np_cave      &&
 386                 np_humidity      && np_apple_trees;
 387         return success;
 388 }
 389
 390
 391 void MapgenV6Params::writeParams(Settings *settings) {
 392         settings->setFloat("mgv6_freq_desert", freq_desert);
 393         settings->setFloat("mgv6_freq_beach",  freq_beach);
 394
 395         settings->setNoiseParams("mgv6_np_terrain_base",   np_terrain_base);
 396         settings->setNoiseParams("mgv6_np_terrain_higher", np_terrain_higher);
 397         settings->setNoiseParams("mgv6_np_steepness",      np_steepness);
 398         settings->setNoiseParams("mgv6_np_height_select",  np_height_select);
 399         settings->setNoiseParams("mgv6_np_mud",            np_mud);
 400         settings->setNoiseParams("mgv6_np_beach",          np_beach);
 401         settings->setNoiseParams("mgv6_np_biome",          np_biome);
 402         settings->setNoiseParams("mgv6_np_cave",           np_cave);
 403         settings->setNoiseParams("mgv6_np_humidity",       np_humidity);
 404         settings->setNoiseParams("mgv6_np_trees",          np_trees);
 405         settings->setNoiseParams("mgv6_np_apple_trees",    np_apple_trees);
 406 }
 407
 408
 409 bool MapgenV7Params::readParams(Settings *settings) {
 410         np_terrain_base    = settings->getNoiseParams("mgv7_np_terrain_base");
 411         np_terrain_alt     = settings->getNoiseParams("mgv7_np_terrain_alt");
 412         np_terrain_mod     = settings->getNoiseParams("mgv7_np_terrain_mod");
 413         np_terrain_persist = settings->getNoiseParams("mgv7_np_terrain_persist");
 414         np_height_select   = settings->getNoiseParams("mgv7_np_height_select");
 415         np_ridge           = settings->getNoiseParams("mgv7_np_ridge");
 416
 417         bool success =
 418                 np_terrain_base    && np_terrain_alt   && np_terrain_mod &&
 419                 np_terrain_persist && np_height_select && np_ridge;
 420         return success;
 421 }
 422
 423
 424 void MapgenV7Params::writeParams(Settings *settings) {
 425         settings->setNoiseParams("mgv7_np_terrain_base",    np_terrain_base);
 426         settings->setNoiseParams("mgv7_np_terrain_alt",     np_terrain_alt);
 427         settings->setNoiseParams("mgv7_np_terrain_mod",     np_terrain_mod);
 428         settings->setNoiseParams("mgv7_np_terrain_persist", np_terrain_persist);
 429         settings->setNoiseParams("mgv7_np_height_select",   np_height_select);
 430         settings->setNoiseParams("mgv7_np_ridge",           np_ridge);
 431 }
 432
 433
 434 /////////////////////////////////// legacy static functions for farmesh
 435
 436
 437 s16 Mapgen::find_ground_level_from_noise(u64 seed, v2s16 p2d, s16 precision) {
 438         //just need to return something
 439         s16 level = 5;
 440         return level;
 441 }
 442
 443
 444 bool Mapgen::get_have_beach(u64 seed, v2s16 p2d) {
 445         double sandnoise = noise2d_perlin(
 446                         0.2+(float)p2d.X/250, 0.7+(float)p2d.Y/250,
 447                         seed+59420, 3, 0.50);
 448
 449         return (sandnoise > 0.15);
 450 }
 451
 452
 453 double Mapgen::tree_amount_2d(u64 seed, v2s16 p) {
 454         double noise = noise2d_perlin(
 455                         0.5+(float)p.X/125, 0.5+(float)p.Y/125,
 456                         seed+2, 4, 0.66);
 457         double zeroval = -0.39;
 458         if(noise < zeroval)
 459                 return 0;
 460         else
 461                 return 0.04 * (noise-zeroval) / (1.0-zeroval);
 462 }