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