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 Ore::placeOre(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         int ymin, ymax;
 109
 110         if (in_range & ORE_RANGE_MIRROR) {
 111                 ymin = MYMAX(nmin.Y, -height_max);
 112                 ymax = MYMIN(nmax.Y, -height_min);
 113         } else {
 114                 ymin = MYMAX(nmin.Y, height_min);
 115                 ymax = MYMIN(nmax.Y, height_max);
 116         }
 117         if (clust_size >= ymax - ymin + 1)
 118                 return;
 119
 120         nmin.Y = ymin;
 121         nmax.Y = ymax;
 122         generate(mg->vm, mg->seed, blockseed, nmin, nmax);
 123 }
 124
 125
 126 void OreScatter::generate(ManualMapVoxelManipulator *vm, int seed,
 127                                                 u32 blockseed, v3s16 nmin, v3s16 nmax) {
 128         PseudoRandom pr(blockseed);
 129         MapNode n_ore(ore, 0, ore_param2);
 130
 131         int volume = (nmax.X - nmin.X + 1) *
 132                                  (nmax.Y - nmin.Y + 1) *
 133                                  (nmax.Z - nmin.Z + 1);
 134         int csize     = clust_size;
 135         int orechance = (csize * csize * csize) / clust_num_ores;
 136         int nclusters = volume / clust_scarcity;
 137
 138         for (int i = 0; i != nclusters; i++) {
 139                 int x0 = pr.range(nmin.X, nmax.X - csize + 1);
 140                 int y0 = pr.range(nmin.Y, nmax.Y - csize + 1);
 141                 int z0 = pr.range(nmin.Z, nmax.Z - csize + 1);
 142
 143                 if (np && (NoisePerlin3D(np, x0, y0, z0, seed) < nthresh))
 144                         continue;
 145
 146                 for (int z1 = 0; z1 != csize; z1++)
 147                 for (int y1 = 0; y1 != csize; y1++)
 148                 for (int x1 = 0; x1 != csize; x1++) {
 149                         if (pr.range(1, orechance) != 1)
 150                                 continue;
 151
 152                         u32 i = vm->m_area.index(x0 + x1, y0 + y1, z0 + z1);
 153                         if (vm->m_data[i].getContent() == wherein)
 154                                 vm->m_data[i] = n_ore;
 155                 }
 156         }
 157 }
 158
 159
 160 void OreSheet::generate(ManualMapVoxelManipulator *vm, int seed,
 161                                                 u32 blockseed, v3s16 nmin, v3s16 nmax) {
 162         PseudoRandom pr(blockseed + 4234);
 163         MapNode n_ore(ore, 0, ore_param2);
 164
 165         int max_height = clust_size;
 166         int y_start = pr.range(nmin.Y, nmax.Y - max_height);
 167
 168         if (!noise) {
 169                 int sx = nmax.X - nmin.X + 1;
 170                 int sz = nmax.Z - nmin.Z + 1;
 171                 noise = new Noise(np, 0, sx, sz);
 172         }
 173         noise->seed = seed + y_start;
 174         noise->perlinMap2D(nmin.X, nmin.Z);
 175
 176         int index = 0;
 177         for (int z = nmin.Z; z <= nmax.Z; z++)
 178         for (int x = nmin.X; x <= nmax.X; x++) {
 179                 float noiseval = noise->result[index++];
 180                 if (noiseval < nthresh)
 181                         continue;
 182
 183                 int height = max_height * (1. / pr.range(1, 3));
 184                 int y0 = y_start + np->scale * noiseval; //pr.range(1, 3) - 1;
 185                 int y1 = y0 + height;
 186                 for (int y = y0; y != y1; y++) {
 187                         u32 i = vm->m_area.index(x, y, z);
 188                         if (!vm->m_area.contains(i))
 189                                 continue;
 190
 191                         if (vm->m_data[i].getContent() == wherein)
 192                                 vm->m_data[i] = n_ore;
 193                 }
 194         }
 195 }
 196
 197
 198 void Mapgen::updateLiquid(UniqueQueue<v3s16> *trans_liquid, v3s16 nmin, v3s16 nmax) {
 199         bool isliquid, wasliquid;
 200         v3s16 em  = vm->m_area.getExtent();
 201
 202         for (s16 z = nmin.Z; z <= nmax.Z; z++) {
 203                 for (s16 x = nmin.X; x <= nmax.X; x++) {
 204                         wasliquid = true;
 205
 206                         u32 i = vm->m_area.index(x, nmax.Y, z);
 207                         for (s16 y = nmax.Y; y >= nmin.Y; y--) {
 208                                 isliquid = ndef->get(vm->m_data[i]).isLiquid();
 209
 210                                 // there was a change between liquid and nonliquid, add to queue
 211                                 if (isliquid != wasliquid)
 212                                         trans_liquid->push_back(v3s16(x, y, z));
 213
 214                                 wasliquid = isliquid;
 215                                 vm->m_area.add_y(em, i, -1);
 216                         }
 217                 }
 218         }
 219 }
 220
 221
 222 void Mapgen::setLighting(v3s16 nmin, v3s16 nmax, u8 light) {
 223         ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);
 224         VoxelArea a(nmin, nmax);
 225
 226         for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
 227                 for (int y = a.MinEdge.Y; y <= a.MaxEdge.Y; y++) {
 228                         u32 i = vm->m_area.index(a.MinEdge.X, y, z);
 229                         for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++, i++)
 230                                 vm->m_data[i].param1 = light;
 231                 }
 232         }
 233 }
 234
 235
 236 void Mapgen::lightSpread(VoxelArea &a, v3s16 p, u8 light) {
 237         if (light <= 1 || !a.contains(p))
 238                 return;
 239
 240         u32 vi = vm->m_area.index(p);
 241         MapNode &nn = vm->m_data[vi];
 242
 243         light--;
 244         // should probably compare masked, but doesn't seem to make a difference
 245         if (light <= nn.param1 || !ndef->get(nn).light_propagates)
 246                 return;
 247
 248         nn.param1 = light;
 249
 250         lightSpread(a, p + v3s16(0, 0, 1), light);
 251         lightSpread(a, p + v3s16(0, 1, 0), light);
 252         lightSpread(a, p + v3s16(1, 0, 0), light);
 253         lightSpread(a, p - v3s16(0, 0, 1), light);
 254         lightSpread(a, p - v3s16(0, 1, 0), light);
 255         lightSpread(a, p - v3s16(1, 0, 0), light);
 256 }
 257
 258
 259 void Mapgen::calcLighting(v3s16 nmin, v3s16 nmax) {
 260         VoxelArea a(nmin, nmax);
 261         bool block_is_underground = (water_level >= nmax.Y);
 262
 263         ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);
 264         //TimeTaker t("updateLighting");
 265
 266         // first, send vertical rays of sunshine downward
 267         v3s16 em = vm->m_area.getExtent();
 268         for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
 269                 for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++) {
 270                         // see if we can get a light value from the overtop
 271                         u32 i = vm->m_area.index(x, a.MaxEdge.Y + 1, z);
 272                         if (vm->m_data[i].getContent() == CONTENT_IGNORE) {
 273                                 if (block_is_underground)
 274                                         continue;
 275                         } else if ((vm->m_data[i].param1 & 0x0F) != LIGHT_SUN) {
 276                                 continue;
 277                         }
 278                         vm->m_area.add_y(em, i, -1);
 279
 280                         for (int y = a.MaxEdge.Y; y >= a.MinEdge.Y; y--) {
 281                                 MapNode &n = vm->m_data[i];
 282                                 if (!ndef->get(n).sunlight_propagates)
 283                                         break;
 284                                 n.param1 = LIGHT_SUN;
 285                                 vm->m_area.add_y(em, i, -1);
 286                         }
 287                 }
 288         }
 289
 290         // now spread the sunlight and light up any sources
 291         for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
 292                 for (int y = a.MinEdge.Y; y <= a.MaxEdge.Y; y++) {
 293                         u32 i = vm->m_area.index(a.MinEdge.X, y, z);
 294                         for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++, i++) {
 295                                 MapNode &n = vm->m_data[i];
 296                                 if (n.getContent() == CONTENT_IGNORE ||
 297                                         !ndef->get(n).light_propagates)
 298                                         continue;
 299
 300                                 u8 light_produced = ndef->get(n).light_source & 0x0F;
 301                                 if (light_produced)
 302                                         n.param1 = light_produced;
 303
 304                                 u8 light = n.param1 & 0x0F;
 305                                 if (light) {
 306                                         lightSpread(a, v3s16(x,     y,     z + 1), light);
 307                                         lightSpread(a, v3s16(x,     y + 1, z    ), light);
 308                                         lightSpread(a, v3s16(x + 1, y,     z    ), light);
 309                                         lightSpread(a, v3s16(x,     y,     z - 1), light);
 310                                         lightSpread(a, v3s16(x,     y - 1, z    ), light);
 311                                         lightSpread(a, v3s16(x - 1, y,     z    ), light);
 312                                 }
 313                         }
 314                 }
 315         }
 316
 317         //printf("updateLighting: %dms\n", t.stop());
 318 }
 319
 320
 321 void Mapgen::calcLightingOld(v3s16 nmin, v3s16 nmax) {
 322         enum LightBank banks[2] = {LIGHTBANK_DAY, LIGHTBANK_NIGHT};
 323         VoxelArea a(nmin, nmax);
 324         bool block_is_underground = (water_level > nmax.Y);
 325         bool sunlight = !block_is_underground;
 326
 327         ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);
 328
 329         for (int i = 0; i < 2; i++) {
 330                 enum LightBank bank = banks[i];
 331                 std::set<v3s16> light_sources;
 332                 std::map<v3s16, u8> unlight_from;
 333
 334                 voxalgo::clearLightAndCollectSources(*vm, a, bank, ndef,
 335                                         light_sources, unlight_from);
 336                 voxalgo::propagateSunlight(*vm, a, sunlight, light_sources, ndef);
 337
 338                 vm->unspreadLight(bank, unlight_from, light_sources, ndef);
 339                 vm->spreadLight(bank, light_sources, ndef);
 340         }
 341 }
 342
 343
 344 //////////////////////// Mapgen V6 parameter read/write
 345
 346 bool MapgenV6Params::readParams(Settings *settings) {
 347         freq_desert = settings->getFloat("mgv6_freq_desert");
 348         freq_beach  = settings->getFloat("mgv6_freq_beach");
 349
 350         np_terrain_base   = settings->getNoiseParams("mgv6_np_terrain_base");
 351         np_terrain_higher = settings->getNoiseParams("mgv6_np_terrain_higher");
 352         np_steepness      = settings->getNoiseParams("mgv6_np_steepness");
 353         np_height_select  = settings->getNoiseParams("mgv6_np_height_select");
 354         np_mud            = settings->getNoiseParams("mgv6_np_mud");
 355         np_beach          = settings->getNoiseParams("mgv6_np_beach");
 356         np_biome          = settings->getNoiseParams("mgv6_np_biome");
 357         np_cave           = settings->getNoiseParams("mgv6_np_cave");
 358         np_humidity       = settings->getNoiseParams("mgv6_np_humidity");
 359         np_trees          = settings->getNoiseParams("mgv6_np_trees");
 360         np_apple_trees    = settings->getNoiseParams("mgv6_np_apple_trees");
 361
 362         bool success =
 363                 np_terrain_base  && np_terrain_higher && np_steepness &&
 364                 np_height_select && np_trees          && np_mud       &&
 365                 np_beach         && np_biome          && np_cave      &&
 366                 np_humidity      && np_apple_trees;
 367         return success;
 368 }
 369
 370
 371 void MapgenV6Params::writeParams(Settings *settings) {
 372         settings->setFloat("mgv6_freq_desert", freq_desert);
 373         settings->setFloat("mgv6_freq_beach",  freq_beach);
 374
 375         settings->setNoiseParams("mgv6_np_terrain_base",   np_terrain_base);
 376         settings->setNoiseParams("mgv6_np_terrain_higher", np_terrain_higher);
 377         settings->setNoiseParams("mgv6_np_steepness",      np_steepness);
 378         settings->setNoiseParams("mgv6_np_height_select",  np_height_select);
 379         settings->setNoiseParams("mgv6_np_mud",            np_mud);
 380         settings->setNoiseParams("mgv6_np_beach",          np_beach);
 381         settings->setNoiseParams("mgv6_np_biome",          np_biome);
 382         settings->setNoiseParams("mgv6_np_cave",           np_cave);
 383         settings->setNoiseParams("mgv6_np_humidity",       np_humidity);
 384         settings->setNoiseParams("mgv6_np_trees",          np_trees);
 385         settings->setNoiseParams("mgv6_np_apple_trees",    np_apple_trees);
 386 }
 387
 388
 389 bool MapgenV7Params::readParams(Settings *settings) {
 390         np_terrain_base    = settings->getNoiseParams("mgv7_np_terrain_base");
 391         np_terrain_alt     = settings->getNoiseParams("mgv7_np_terrain_alt");
 392         np_terrain_mod     = settings->getNoiseParams("mgv7_np_terrain_mod");
 393         np_terrain_persist = settings->getNoiseParams("mgv7_np_terrain_persist");
 394         np_height_select   = settings->getNoiseParams("mgv7_np_height_select");
 395         np_ridge           = settings->getNoiseParams("mgv7_np_ridge");
 396
 397         bool success =
 398                 np_terrain_base    && np_terrain_alt   && np_terrain_mod &&
 399                 np_terrain_persist && np_height_select && np_ridge;
 400         return success;
 401 }
 402
 403
 404 void MapgenV7Params::writeParams(Settings *settings) {
 405         settings->setNoiseParams("mgv7_np_terrain_base",    np_terrain_base);
 406         settings->setNoiseParams("mgv7_np_terrain_alt",     np_terrain_alt);
 407         settings->setNoiseParams("mgv7_np_terrain_mod",     np_terrain_mod);
 408         settings->setNoiseParams("mgv7_np_terrain_persist", np_terrain_persist);
 409         settings->setNoiseParams("mgv7_np_height_select",   np_height_select);
 410         settings->setNoiseParams("mgv7_np_ridge",           np_ridge);
 411 }
 412
 413
 414 /////////////////////////////////// legacy static functions for farmesh
 415
 416
 417 s16 Mapgen::find_ground_level_from_noise(u64 seed, v2s16 p2d, s16 precision) {
 418         //just need to return something
 419         s16 level = 5;
 420         return level;
 421 }
 422
 423
 424 bool Mapgen::get_have_beach(u64 seed, v2s16 p2d) {
 425         double sandnoise = noise2d_perlin(
 426                         0.2+(float)p2d.X/250, 0.7+(float)p2d.Y/250,
 427                         seed+59420, 3, 0.50);
 428
 429         return (sandnoise > 0.15);
 430 }
 431
 432
 433 double Mapgen::tree_amount_2d(u64 seed, v2s16 p) {
 434         double noise = noise2d_perlin(
 435                         0.5+(float)p.X/125, 0.5+(float)p.Y/125,
 436                         seed+2, 4, 0.66);
 437         double zeroval = -0.39;
 438         if(noise < zeroval)
 439                 return 0;
 440         else
 441                 return 0.04 * (noise-zeroval) / (1.0-zeroval);
 442 }