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
  38 FlagDesc flagdesc_mapgen[] = {
  39         {"trees",          MG_TREES},
  40         {"caves",          MG_CAVES},
  41         {"dungeons",       MG_DUNGEONS},
  42         {"v6_jungles",     MGV6_JUNGLES},
  43         {"v6_biome_blend", MGV6_BIOME_BLEND},
  44         {"flat",           MG_FLAT},
  45         {NULL,                     0}
  46 };
  47
  48
  49 ///////////////////////////////////////////////////////////////////////////////
  50
  51
  52 Ore *createOre(OreType type) {
  53         switch (type) {
  54                 case ORE_SCATTER:
  55                         return new OreScatter;
  56                 case ORE_SHEET:
  57                         return new OreSheet;
  58                 //case ORE_CLAYLIKE: //TODO: implement this!
  59                 //      return new OreClaylike;
  60                 default:
  61                         return NULL;
  62         }
  63 }
  64
  65
  66 void Ore::resolveNodeNames(INodeDefManager *ndef) {
  67         if (ore == CONTENT_IGNORE) {
  68                 ore = ndef->getId(ore_name);
  69                 if (ore == CONTENT_IGNORE) {
  70                         errorstream << "Ore::resolveNodeNames: ore node '"
  71                                 << ore_name << "' not defined";
  72                         ore     = CONTENT_AIR;
  73                         wherein = CONTENT_AIR;
  74                 }
  75         }
  76
  77         if (wherein == CONTENT_IGNORE) {
  78                 wherein = ndef->getId(wherein_name);
  79                 if (wherein == CONTENT_IGNORE) {
  80                         errorstream << "Ore::resolveNodeNames: wherein node '"
  81                                 << wherein_name << "' not defined";
  82                         ore     = CONTENT_AIR;
  83                         wherein = CONTENT_AIR;
  84                 }
  85         }
  86 }
  87
  88
  89 void OreScatter::generate(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax) {
  90         if (nmin.Y > height_max || nmax.Y < height_min)
  91                 return;
  92
  93         resolveNodeNames(mg->ndef);
  94
  95         MapNode n_ore(ore);
  96         ManualMapVoxelManipulator *vm = mg->vm;
  97         PseudoRandom pr(blockseed);
  98
  99         int ymin   = MYMAX(nmin.Y, height_min);
 100         int ymax   = MYMIN(nmax.Y, height_max);
 101         if (clust_size >= ymax - ymin + 1)
 102                 return;
 103
 104         int volume = (nmax.X - nmin.X + 1) *
 105                                  (nmax.Y - nmin.Y + 1) *
 106                                  (nmax.Z - nmin.Z + 1);
 107         int csize     = clust_size;
 108         int orechance = (csize * csize * csize) / clust_num_ores;
 109         int nclusters = volume / clust_scarcity;
 110
 111         for (int i = 0; i != nclusters; i++) {
 112                 int x0 = pr.range(nmin.X, nmax.X - csize + 1);
 113                 int y0 = pr.range(ymin,   ymax   - csize + 1);
 114                 int z0 = pr.range(nmin.Z, nmax.Z - csize + 1);
 115
 116                 if (np && (NoisePerlin3D(np, x0, y0, z0, mg->seed) < nthresh))
 117                         continue;
 118
 119                 for (int z1 = 0; z1 != csize; z1++)
 120                 for (int y1 = 0; y1 != csize; y1++)
 121                 for (int x1 = 0; x1 != csize; x1++) {
 122                         if (pr.range(1, orechance) != 1)
 123                                 continue;
 124
 125                         u32 i = vm->m_area.index(x0 + x1, y0 + y1, z0 + z1);
 126                         if (vm->m_data[i].getContent() == wherein)
 127                                 vm->m_data[i] = n_ore;
 128                 }
 129         }
 130 }
 131
 132
 133 void OreSheet::generate(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax) {
 134         if (nmin.Y > height_max || nmax.Y < height_min)
 135                 return;
 136
 137         resolveNodeNames(mg->ndef);
 138
 139         MapNode n_ore(ore);
 140         ManualMapVoxelManipulator *vm = mg->vm;
 141         PseudoRandom pr(blockseed + 4234);
 142
 143         int ymin = MYMAX(nmin.Y, height_min);
 144         int ymax = MYMIN(nmax.Y, height_max);
 145         if (clust_size >= ymax - ymin + 1)
 146                 return;
 147
 148         int x0 = nmin.X;
 149         int z0 = nmin.Z;
 150
 151         int x1 = nmax.X;
 152         int z1 = nmax.Z;
 153
 154         int max_height = clust_size;
 155         int y_start = pr.range(ymin, ymax - max_height);
 156
 157         if (!noise) {
 158                 int sx = nmax.X - nmin.X + 1;
 159                 int sz = nmax.Z - nmin.Z + 1;
 160                 noise = new Noise(np, 0, sx, sz);
 161         }
 162         noise->seed = mg->seed + y_start;
 163         noise->perlinMap2D(x0, z0);
 164
 165         int index = 0;
 166         for (int z = z0; z != z1; z++)
 167         for (int x = x0; x != x1; x++) {
 168                 float noiseval = noise->result[index++];
 169                 if (noiseval < nthresh)
 170                         continue;
 171
 172                 int height = max_height * (1. / pr.range(1, 3));
 173                 int y0 = y_start + np->scale * noiseval; //pr.range(1, 3) - 1;
 174                 int y1 = y0 + height;
 175                 for (int y = y0; y != y1; y++) {
 176                         u32 i = vm->m_area.index(x, y, z);
 177                         if (!vm->m_area.contains(i))
 178                                 continue;
 179
 180                         if (vm->m_data[i].getContent() == wherein)
 181                                 vm->m_data[i] = n_ore;
 182                 }
 183         }
 184 }
 185
 186
 187 void Mapgen::updateLiquid(UniqueQueue<v3s16> *trans_liquid, v3s16 nmin, v3s16 nmax) {
 188         bool isliquid, wasliquid;
 189         v3s16 em  = vm->m_area.getExtent();
 190
 191         for (s16 z = nmin.Z; z <= nmax.Z; z++) {
 192                 for (s16 x = nmin.X; x <= nmax.X; x++) {
 193                         wasliquid = true;
 194
 195                         u32 i = vm->m_area.index(x, nmax.Y, z);
 196                         for (s16 y = nmax.Y; y >= nmin.Y; y--) {
 197                                 isliquid = ndef->get(vm->m_data[i]).isLiquid();
 198
 199                                 // there was a change between liquid and nonliquid, add to queue
 200                                 if (isliquid != wasliquid)
 201                                         trans_liquid->push_back(v3s16(x, y, z));
 202
 203                                 wasliquid = isliquid;
 204                                 vm->m_area.add_y(em, i, -1);
 205                         }
 206                 }
 207         }
 208 }
 209
 210
 211 void Mapgen::setLighting(v3s16 nmin, v3s16 nmax, u8 light) {
 212         ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);
 213         VoxelArea a(nmin - v3s16(1,0,1) * MAP_BLOCKSIZE,
 214                                 nmax + v3s16(1,0,1) * MAP_BLOCKSIZE);
 215
 216         for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
 217                 for (int y = a.MinEdge.Y; y <= a.MaxEdge.Y; y++) {
 218                         u32 i = vm->m_area.index(a.MinEdge.X, y, z);
 219                         for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++, i++)
 220                                 vm->m_data[i].param1 = light;
 221                 }
 222         }
 223 }
 224
 225
 226 void Mapgen::lightSpread(VoxelArea &a, v3s16 p, u8 light) {
 227         if (light <= 1 || !a.contains(p))
 228                 return;
 229
 230         u32 vi = vm->m_area.index(p);
 231         MapNode &nn = vm->m_data[vi];
 232
 233         light--;
 234         // should probably compare masked, but doesn't seem to make a difference
 235         if (light <= nn.param1 || !ndef->get(nn).light_propagates)
 236                 return;
 237
 238         nn.param1 = light;
 239
 240         lightSpread(a, p + v3s16(0, 0, 1), light);
 241         lightSpread(a, p + v3s16(0, 1, 0), light);
 242         lightSpread(a, p + v3s16(1, 0, 0), light);
 243         lightSpread(a, p - v3s16(0, 0, 1), light);
 244         lightSpread(a, p - v3s16(0, 1, 0), light);
 245         lightSpread(a, p - v3s16(1, 0, 0), light);
 246 }
 247
 248
 249 void Mapgen::calcLighting(v3s16 nmin, v3s16 nmax) {
 250         VoxelArea a(nmin - v3s16(1,0,1) * MAP_BLOCKSIZE,
 251                                 nmax + v3s16(1,0,1) * MAP_BLOCKSIZE);
 252         bool block_is_underground = (water_level >= nmax.Y);
 253
 254         ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);
 255         //TimeTaker t("updateLighting");
 256
 257         // first, send vertical rays of sunshine downward
 258         v3s16 em = vm->m_area.getExtent();
 259         for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
 260                 for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++) {
 261                         // see if we can get a light value from the overtop
 262                         u32 i = vm->m_area.index(x, a.MaxEdge.Y + 1, z);
 263                         if (vm->m_data[i].getContent() == CONTENT_IGNORE) {
 264                                 if (block_is_underground)
 265                                         continue;
 266                         } else if ((vm->m_data[i].param1 & 0x0F) != LIGHT_SUN) {
 267                                 continue;
 268                         }
 269                         vm->m_area.add_y(em, i, -1);
 270
 271                         for (int y = a.MaxEdge.Y; y >= a.MinEdge.Y; y--) {
 272                                 MapNode &n = vm->m_data[i];
 273                                 if (!ndef->get(n).sunlight_propagates)
 274                                         break;
 275                                 n.param1 = LIGHT_SUN;
 276                                 vm->m_area.add_y(em, i, -1);
 277                         }
 278                 }
 279         }
 280
 281         // now spread the sunlight and light up any sources
 282         for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
 283                 for (int y = a.MinEdge.Y; y <= a.MaxEdge.Y; y++) {
 284                         u32 i = vm->m_area.index(a.MinEdge.X, y, z);
 285                         for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++, i++) {
 286                                 MapNode &n = vm->m_data[i];
 287                                 if (n.getContent() == CONTENT_IGNORE ||
 288                                         !ndef->get(n).light_propagates)
 289                                         continue;
 290
 291                                 u8 light_produced = ndef->get(n).light_source & 0x0F;
 292                                 if (light_produced)
 293                                         n.param1 = light_produced;
 294
 295                                 u8 light = n.param1 & 0x0F;
 296                                 if (light) {
 297                                         lightSpread(a, v3s16(x,     y,     z + 1), light);
 298                                         lightSpread(a, v3s16(x,     y + 1, z    ), light);
 299                                         lightSpread(a, v3s16(x + 1, y,     z    ), light);
 300                                         lightSpread(a, v3s16(x,     y,     z - 1), light);
 301                                         lightSpread(a, v3s16(x,     y - 1, z    ), light);
 302                                         lightSpread(a, v3s16(x - 1, y,     z    ), light);
 303                                 }
 304                         }
 305                 }
 306         }
 307
 308         //printf("updateLighting: %dms\n", t.stop());
 309 }
 310
 311
 312 void Mapgen::calcLightingOld(v3s16 nmin, v3s16 nmax) {
 313         enum LightBank banks[2] = {LIGHTBANK_DAY, LIGHTBANK_NIGHT};
 314
 315         VoxelArea a(nmin - v3s16(1,0,1) * MAP_BLOCKSIZE,
 316                                 nmax + v3s16(1,0,1) * MAP_BLOCKSIZE);
 317         bool block_is_underground = (water_level > nmax.Y);
 318         bool sunlight = !block_is_underground;
 319
 320         ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);
 321
 322         for (int i = 0; i < 2; i++) {
 323                 enum LightBank bank = banks[i];
 324                 std::set<v3s16> light_sources;
 325                 std::map<v3s16, u8> unlight_from;
 326
 327                 voxalgo::clearLightAndCollectSources(*vm, a, bank, ndef,
 328                                         light_sources, unlight_from);
 329                 voxalgo::propagateSunlight(*vm, a, sunlight, light_sources, ndef);
 330
 331                 vm->unspreadLight(bank, unlight_from, light_sources, ndef);
 332                 vm->spreadLight(bank, light_sources, ndef);
 333         }
 334 }
 335
 336
 337 //////////////////////// Mapgen V6 parameter read/write
 338
 339 bool MapgenV6Params::readParams(Settings *settings) {
 340         freq_desert = settings->getFloat("mgv6_freq_desert");
 341         freq_beach  = settings->getFloat("mgv6_freq_beach");
 342
 343         np_terrain_base   = settings->getNoiseParams("mgv6_np_terrain_base");
 344         np_terrain_higher = settings->getNoiseParams("mgv6_np_terrain_higher");
 345         np_steepness      = settings->getNoiseParams("mgv6_np_steepness");
 346         np_height_select  = settings->getNoiseParams("mgv6_np_height_select");
 347         np_mud            = settings->getNoiseParams("mgv6_np_mud");
 348         np_beach          = settings->getNoiseParams("mgv6_np_beach");
 349         np_biome          = settings->getNoiseParams("mgv6_np_biome");
 350         np_cave           = settings->getNoiseParams("mgv6_np_cave");
 351         np_humidity       = settings->getNoiseParams("mgv6_np_humidity");
 352         np_trees          = settings->getNoiseParams("mgv6_np_trees");
 353         np_apple_trees    = settings->getNoiseParams("mgv6_np_apple_trees");
 354
 355         bool success =
 356                 np_terrain_base  && np_terrain_higher && np_steepness &&
 357                 np_height_select && np_trees          && np_mud       &&
 358                 np_beach         && np_biome          && np_cave      &&
 359                 np_humidity      && np_apple_trees;
 360         return success;
 361 }
 362
 363
 364 void MapgenV6Params::writeParams(Settings *settings) {
 365         settings->setFloat("mgv6_freq_desert", freq_desert);
 366         settings->setFloat("mgv6_freq_beach",  freq_beach);
 367
 368         settings->setNoiseParams("mgv6_np_terrain_base",   np_terrain_base);
 369         settings->setNoiseParams("mgv6_np_terrain_higher", np_terrain_higher);
 370         settings->setNoiseParams("mgv6_np_steepness",      np_steepness);
 371         settings->setNoiseParams("mgv6_np_height_select",  np_height_select);
 372         settings->setNoiseParams("mgv6_np_mud",            np_mud);
 373         settings->setNoiseParams("mgv6_np_beach",          np_beach);
 374         settings->setNoiseParams("mgv6_np_biome",          np_biome);
 375         settings->setNoiseParams("mgv6_np_cave",           np_cave);
 376         settings->setNoiseParams("mgv6_np_humidity",       np_humidity);
 377         settings->setNoiseParams("mgv6_np_trees",          np_trees);
 378         settings->setNoiseParams("mgv6_np_apple_trees",    np_apple_trees);
 379 }
 380
 381
 382 /////////////////////////////////// legacy static functions for farmesh
 383
 384
 385 s16 Mapgen::find_ground_level_from_noise(u64 seed, v2s16 p2d, s16 precision) {
 386         //just need to return something
 387         s16 level = 5;
 388         return level;
 389 }
 390
 391
 392 bool Mapgen::get_have_beach(u64 seed, v2s16 p2d) {
 393         double sandnoise = noise2d_perlin(
 394                         0.2+(float)p2d.X/250, 0.7+(float)p2d.Y/250,
 395                         seed+59420, 3, 0.50);
 396
 397         return (sandnoise > 0.15);
 398 }
 399
 400
 401 double Mapgen::tree_amount_2d(u64 seed, v2s16 p) {
 402         double noise = noise2d_perlin(
 403                         0.5+(float)p.X/125, 0.5+(float)p.Y/125,
 404                         seed+2, 4, 0.66);
 405         double zeroval = -0.39;
 406         if(noise < zeroval)
 407                 return 0;
 408         else
 409                 return 0.04 * (noise-zeroval) / (1.0-zeroval);
 410 }