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