src/mapgen/mg_ore.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2015-2020 paramat
   4 Copyright (C) 2014-2016 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU Lesser General Public License as published by
   8 the Free Software Foundation; either version 2.1 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU Lesser General Public License for more details.
  15
  16 You should have received a copy of the GNU Lesser General Public License along
  17 with this program; if not, write to the Free Software Foundation, Inc.,
  18 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19 */
  20
  21 #include "mg_ore.h"
  22 #include "mapgen.h"
  23 #include "noise.h"
  24 #include "map.h"
  25 #include "log.h"
  26 #include "util/numeric.h"
  27 #include <cmath>
  28 #include <algorithm>
  29
  30
  31 FlagDesc flagdesc_ore[] = {
  32         {"absheight",                 OREFLAG_ABSHEIGHT}, // Non-functional
  33         {"puff_cliffs",               OREFLAG_PUFF_CLIFFS},
  34         {"puff_additive_composition", OREFLAG_PUFF_ADDITIVE},
  35         {NULL,                        0}
  36 };
  37
  38
  39 ///////////////////////////////////////////////////////////////////////////////
  40
  41
  42 OreManager::OreManager(IGameDef *gamedef) :
  43         ObjDefManager(gamedef, OBJDEF_ORE)
  44 {
  45 }
  46
  47
  48 size_t OreManager::placeAllOres(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax)
  49 {
  50         size_t nplaced = 0;
  51
  52         for (size_t i = 0; i != m_objects.size(); i++) {
  53                 Ore *ore = (Ore *)m_objects[i];
  54                 if (!ore)
  55                         continue;
  56
  57                 nplaced += ore->placeOre(mg, blockseed, nmin, nmax);
  58                 blockseed++;
  59         }
  60
  61         return nplaced;
  62 }
  63
  64
  65 void OreManager::clear()
  66 {
  67         for (ObjDef *object : m_objects) {
  68                 Ore *ore = (Ore *) object;
  69                 delete ore;
  70         }
  71         m_objects.clear();
  72 }
  73
  74
  75 OreManager *OreManager::clone() const
  76 {
  77         auto mgr = new OreManager();
  78         ObjDefManager::cloneTo(mgr);
  79         return mgr;
  80 }
  81
  82
  83 ///////////////////////////////////////////////////////////////////////////////
  84
  85
  86 Ore::~Ore()
  87 {
  88         delete noise;
  89 }
  90
  91
  92 void Ore::resolveNodeNames()
  93 {
  94         getIdFromNrBacklog(&c_ore, "", CONTENT_AIR);
  95         getIdsFromNrBacklog(&c_wherein);
  96 }
  97
  98
  99 size_t Ore::placeOre(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax)
 100 {
 101         if (nmin.Y > y_max || nmax.Y < y_min)
 102                 return 0;
 103
 104         int actual_ymin = MYMAX(nmin.Y, y_min);
 105         int actual_ymax = MYMIN(nmax.Y, y_max);
 106         if (clust_size >= actual_ymax - actual_ymin + 1)
 107                 return 0;
 108
 109         nmin.Y = actual_ymin;
 110         nmax.Y = actual_ymax;
 111         generate(mg->vm, mg->seed, blockseed, nmin, nmax, mg->biomemap);
 112
 113         return 1;
 114 }
 115
 116
 117 void Ore::cloneTo(Ore *def) const
 118 {
 119         ObjDef::cloneTo(def);
 120         NodeResolver::cloneTo(def);
 121         def->c_ore = c_ore;
 122         def->c_wherein = c_wherein;
 123         def->clust_scarcity = clust_scarcity;
 124         def->clust_num_ores = clust_num_ores;
 125         def->clust_size = clust_size;
 126         def->y_min = y_min;
 127         def->y_max = y_max;
 128         def->ore_param2 = ore_param2;
 129         def->flags = flags;
 130         def->nthresh = nthresh;
 131         def->np = np;
 132         def->noise = nullptr; // cannot be shared! so created on demand
 133         def->biomes = biomes;
 134 }
 135
 136
 137 ///////////////////////////////////////////////////////////////////////////////
 138
 139
 140 ObjDef *OreScatter::clone() const
 141 {
 142         auto def = new OreScatter();
 143         Ore::cloneTo(def);
 144         return def;
 145 }
 146
 147
 148 void OreScatter::generate(MMVManip *vm, int mapseed, u32 blockseed,
 149         v3s16 nmin, v3s16 nmax, biome_t *biomemap)
 150 {
 151         PcgRandom pr(blockseed);
 152         MapNode n_ore(c_ore, 0, ore_param2);
 153
 154         u32 sizex  = (nmax.X - nmin.X + 1);
 155         u32 volume = (nmax.X - nmin.X + 1) *
 156                                  (nmax.Y - nmin.Y + 1) *
 157                                  (nmax.Z - nmin.Z + 1);
 158         u32 csize     = clust_size;
 159         u32 cvolume    = csize * csize * csize;
 160         u32 nclusters = volume / clust_scarcity;
 161
 162         for (u32 i = 0; i != nclusters; i++) {
 163                 int x0 = pr.range(nmin.X, nmax.X - csize + 1);
 164                 int y0 = pr.range(nmin.Y, nmax.Y - csize + 1);
 165                 int z0 = pr.range(nmin.Z, nmax.Z - csize + 1);
 166
 167                 if ((flags & OREFLAG_USE_NOISE) &&
 168                         (NoisePerlin3D(&np, x0, y0, z0, mapseed) < nthresh))
 169                         continue;
 170
 171                 if (biomemap && !biomes.empty()) {
 172                         u32 index = sizex * (z0 - nmin.Z) + (x0 - nmin.X);
 173                         auto it = biomes.find(biomemap[index]);
 174                         if (it == biomes.end())
 175                                 continue;
 176                 }
 177
 178                 for (u32 z1 = 0; z1 != csize; z1++)
 179                 for (u32 y1 = 0; y1 != csize; y1++)
 180                 for (u32 x1 = 0; x1 != csize; x1++) {
 181                         if (pr.range(1, cvolume) > clust_num_ores)
 182                                 continue;
 183
 184                         u32 i = vm->m_area.index(x0 + x1, y0 + y1, z0 + z1);
 185                         if (!CONTAINS(c_wherein, vm->m_data[i].getContent()))
 186                                 continue;
 187
 188                         vm->m_data[i] = n_ore;
 189                 }
 190         }
 191 }
 192
 193
 194 ///////////////////////////////////////////////////////////////////////////////
 195
 196
 197 ObjDef *OreSheet::clone() const
 198 {
 199         auto def = new OreSheet();
 200         Ore::cloneTo(def);
 201
 202         def->column_height_max = column_height_max;
 203         def->column_height_min = column_height_min;
 204         def->column_midpoint_factor = column_midpoint_factor;
 205
 206         return def;
 207 }
 208
 209
 210 void OreSheet::generate(MMVManip *vm, int mapseed, u32 blockseed,
 211         v3s16 nmin, v3s16 nmax, biome_t *biomemap)
 212 {
 213         PcgRandom pr(blockseed + 4234);
 214         MapNode n_ore(c_ore, 0, ore_param2);
 215
 216         u16 max_height = column_height_max;
 217         int y_start_min = nmin.Y + max_height;
 218         int y_start_max = nmax.Y - max_height;
 219
 220         int y_start = y_start_min < y_start_max ?
 221                 pr.range(y_start_min, y_start_max) :
 222                 (y_start_min + y_start_max) / 2;
 223
 224         if (!noise) {
 225                 int sx = nmax.X - nmin.X + 1;
 226                 int sz = nmax.Z - nmin.Z + 1;
 227                 noise = new Noise(&np, 0, sx, sz);
 228         }
 229         noise->seed = mapseed + y_start;
 230         noise->perlinMap2D(nmin.X, nmin.Z);
 231
 232         size_t index = 0;
 233         for (int z = nmin.Z; z <= nmax.Z; z++)
 234         for (int x = nmin.X; x <= nmax.X; x++, index++) {
 235                 float noiseval = noise->result[index];
 236                 if (noiseval < nthresh)
 237                         continue;
 238
 239                 if (biomemap && !biomes.empty()) {
 240                         auto it = biomes.find(biomemap[index]);
 241                         if (it == biomes.end())
 242                                 continue;
 243                 }
 244
 245                 u16 height = pr.range(column_height_min, column_height_max);
 246                 int ymidpoint = y_start + noiseval;
 247                 int y0 = MYMAX(nmin.Y, ymidpoint - height * (1 - column_midpoint_factor));
 248                 int y1 = MYMIN(nmax.Y, y0 + height - 1);
 249
 250                 for (int y = y0; y <= y1; y++) {
 251                         u32 i = vm->m_area.index(x, y, z);
 252                         if (!vm->m_area.contains(i))
 253                                 continue;
 254                         if (!CONTAINS(c_wherein, vm->m_data[i].getContent()))
 255                                 continue;
 256
 257                         vm->m_data[i] = n_ore;
 258                 }
 259         }
 260 }
 261
 262
 263 ///////////////////////////////////////////////////////////////////////////////
 264
 265
 266 OrePuff::~OrePuff()
 267 {
 268         delete noise_puff_top;
 269         delete noise_puff_bottom;
 270 }
 271
 272
 273 ObjDef *OrePuff::clone() const
 274 {
 275         auto def = new OrePuff();
 276         Ore::cloneTo(def);
 277
 278         def->np_puff_top = np_puff_top;
 279         def->np_puff_bottom = np_puff_bottom;
 280         def->noise_puff_top = nullptr; // cannot be shared, on-demand
 281         def->noise_puff_bottom = nullptr;
 282
 283         return def;
 284 }
 285
 286
 287 void OrePuff::generate(MMVManip *vm, int mapseed, u32 blockseed,
 288         v3s16 nmin, v3s16 nmax, biome_t *biomemap)
 289 {
 290         PcgRandom pr(blockseed + 4234);
 291         MapNode n_ore(c_ore, 0, ore_param2);
 292
 293         int y_start = pr.range(nmin.Y, nmax.Y);
 294
 295         if (!noise) {
 296                 int sx = nmax.X - nmin.X + 1;
 297                 int sz = nmax.Z - nmin.Z + 1;
 298                 noise = new Noise(&np, 0, sx, sz);
 299                 noise_puff_top = new Noise(&np_puff_top, 0, sx, sz);
 300                 noise_puff_bottom = new Noise(&np_puff_bottom, 0, sx, sz);
 301         }
 302
 303         noise->seed = mapseed + y_start;
 304         noise->perlinMap2D(nmin.X, nmin.Z);
 305         bool noise_generated = false;
 306
 307         size_t index = 0;
 308         for (int z = nmin.Z; z <= nmax.Z; z++)
 309         for (int x = nmin.X; x <= nmax.X; x++, index++) {
 310                 float noiseval = noise->result[index];
 311                 if (noiseval < nthresh)
 312                         continue;
 313
 314                 if (biomemap && !biomes.empty()) {
 315                         auto it = biomes.find(biomemap[index]);
 316                         if (it == biomes.end())
 317                                 continue;
 318                 }
 319
 320                 if (!noise_generated) {
 321                         noise_generated = true;
 322                         noise_puff_top->perlinMap2D(nmin.X, nmin.Z);
 323                         noise_puff_bottom->perlinMap2D(nmin.X, nmin.Z);
 324                 }
 325
 326                 float ntop    = noise_puff_top->result[index];
 327                 float nbottom = noise_puff_bottom->result[index];
 328
 329                 if (!(flags & OREFLAG_PUFF_CLIFFS)) {
 330                         float ndiff = noiseval - nthresh;
 331                         if (ndiff < 1.0f) {
 332                                 ntop *= ndiff;
 333                                 nbottom *= ndiff;
 334                         }
 335                 }
 336
 337                 int ymid = y_start;
 338                 int y0 = ymid - nbottom;
 339                 int y1 = ymid + ntop;
 340
 341                 if ((flags & OREFLAG_PUFF_ADDITIVE) && (y0 > y1))
 342                         SWAP(int, y0, y1);
 343
 344                 for (int y = y0; y <= y1; y++) {
 345                         u32 i = vm->m_area.index(x, y, z);
 346                         if (!vm->m_area.contains(i))
 347                                 continue;
 348                         if (!CONTAINS(c_wherein, vm->m_data[i].getContent()))
 349                                 continue;
 350
 351                         vm->m_data[i] = n_ore;
 352                 }
 353         }
 354 }
 355
 356
 357 ///////////////////////////////////////////////////////////////////////////////
 358
 359
 360 ObjDef *OreBlob::clone() const
 361 {
 362         auto def = new OreBlob();
 363         Ore::cloneTo(def);
 364         return def;
 365 }
 366
 367
 368 void OreBlob::generate(MMVManip *vm, int mapseed, u32 blockseed,
 369         v3s16 nmin, v3s16 nmax, biome_t *biomemap)
 370 {
 371         PcgRandom pr(blockseed + 2404);
 372         MapNode n_ore(c_ore, 0, ore_param2);
 373
 374         u32 sizex  = (nmax.X - nmin.X + 1);
 375         u32 volume = (nmax.X - nmin.X + 1) *
 376                                  (nmax.Y - nmin.Y + 1) *
 377                                  (nmax.Z - nmin.Z + 1);
 378         u32 csize  = clust_size;
 379         u32 nblobs = volume / clust_scarcity;
 380
 381         if (!noise)
 382                 noise = new Noise(&np, mapseed, csize, csize, csize);
 383
 384         for (u32 i = 0; i != nblobs; i++) {
 385                 int x0 = pr.range(nmin.X, nmax.X - csize + 1);
 386                 int y0 = pr.range(nmin.Y, nmax.Y - csize + 1);
 387                 int z0 = pr.range(nmin.Z, nmax.Z - csize + 1);
 388
 389                 if (biomemap && !biomes.empty()) {
 390                         u32 bmapidx = sizex * (z0 - nmin.Z) + (x0 - nmin.X);
 391                         auto it = biomes.find(biomemap[bmapidx]);
 392                         if (it == biomes.end())
 393                                 continue;
 394                 }
 395
 396                 bool noise_generated = false;
 397                 noise->seed = blockseed + i;
 398
 399                 size_t index = 0;
 400                 for (u32 z1 = 0; z1 != csize; z1++)
 401                 for (u32 y1 = 0; y1 != csize; y1++)
 402                 for (u32 x1 = 0; x1 != csize; x1++, index++) {
 403                         u32 i = vm->m_area.index(x0 + x1, y0 + y1, z0 + z1);
 404                         if (!CONTAINS(c_wherein, vm->m_data[i].getContent()))
 405                                 continue;
 406
 407                         // Lazily generate noise only if there's a chance of ore being placed
 408                         // This simple optimization makes calls 6x faster on average
 409                         if (!noise_generated) {
 410                                 noise_generated = true;
 411                                 noise->perlinMap3D(x0, y0, z0);
 412                         }
 413
 414                         float noiseval = noise->result[index];
 415
 416                         float xdist = (s32)x1 - (s32)csize / 2;
 417                         float ydist = (s32)y1 - (s32)csize / 2;
 418                         float zdist = (s32)z1 - (s32)csize / 2;
 419
 420                         noiseval -= std::sqrt(xdist * xdist + ydist * ydist + zdist * zdist) / csize;
 421
 422                         if (noiseval < nthresh)
 423                                 continue;
 424
 425                         vm->m_data[i] = n_ore;
 426                 }
 427         }
 428 }
 429
 430
 431 ///////////////////////////////////////////////////////////////////////////////
 432
 433
 434 OreVein::~OreVein()
 435 {
 436         delete noise2;
 437 }
 438
 439
 440 ObjDef *OreVein::clone() const
 441 {
 442         auto def = new OreVein();
 443         Ore::cloneTo(def);
 444
 445         def->random_factor = random_factor;
 446         def->noise2 = nullptr; // cannot be shared, on-demand
 447         def->sizey_prev = sizey_prev;
 448
 449         return def;
 450 }
 451
 452
 453 void OreVein::generate(MMVManip *vm, int mapseed, u32 blockseed,
 454         v3s16 nmin, v3s16 nmax, biome_t *biomemap)
 455 {
 456         PcgRandom pr(blockseed + 520);
 457         MapNode n_ore(c_ore, 0, ore_param2);
 458
 459         int sizex = nmax.X - nmin.X + 1;
 460         int sizey = nmax.Y - nmin.Y + 1;
 461         // Because this ore uses 3D noise the perlinmap Y size can be different in
 462         // different mapchunks due to ore Y limits. So recreate the noise objects
 463         // if Y size has changed.
 464         // Because these noise objects are created multiple times for this ore type
 465         // it is necessary to 'delete' them here.
 466         if (!noise || sizey != sizey_prev) {
 467                 delete noise;
 468                 delete noise2;
 469                 int sizez = nmax.Z - nmin.Z + 1;
 470                 noise  = new Noise(&np, mapseed, sizex, sizey, sizez);
 471                 noise2 = new Noise(&np, mapseed + 436, sizex, sizey, sizez);
 472                 sizey_prev = sizey;
 473         }
 474
 475         bool noise_generated = false;
 476         size_t index = 0;
 477         for (int z = nmin.Z; z <= nmax.Z; z++)
 478         for (int y = nmin.Y; y <= nmax.Y; y++)
 479         for (int x = nmin.X; x <= nmax.X; x++, index++) {
 480                 u32 i = vm->m_area.index(x, y, z);
 481                 if (!vm->m_area.contains(i))
 482                         continue;
 483                 if (!CONTAINS(c_wherein, vm->m_data[i].getContent()))
 484                         continue;
 485
 486                 if (biomemap && !biomes.empty()) {
 487                         u32 bmapidx = sizex * (z - nmin.Z) + (x - nmin.X);
 488                         auto it = biomes.find(biomemap[bmapidx]);
 489                         if (it == biomes.end())
 490                                 continue;
 491                 }
 492
 493                 // Same lazy generation optimization as in OreBlob
 494                 if (!noise_generated) {
 495                         noise_generated = true;
 496                         noise->perlinMap3D(nmin.X, nmin.Y, nmin.Z);
 497                         noise2->perlinMap3D(nmin.X, nmin.Y, nmin.Z);
 498                 }
 499
 500                 // randval ranges from -1..1
 501                 /*
 502                         Note: can generate values slightly larger than 1
 503                         but this can't be changed as mapgen must be deterministic accross versions.
 504                 */
 505                 float randval   = (float)pr.next() / float(pr.RANDOM_RANGE / 2) - 1.f;
 506                 float noiseval  = contour(noise->result[index]);
 507                 float noiseval2 = contour(noise2->result[index]);
 508                 if (noiseval * noiseval2 + randval * random_factor < nthresh)
 509                         continue;
 510
 511                 vm->m_data[i] = n_ore;
 512         }
 513 }
 514
 515
 516 ///////////////////////////////////////////////////////////////////////////////
 517
 518
 519 OreStratum::~OreStratum()
 520 {
 521         delete noise_stratum_thickness;
 522 }
 523
 524
 525 ObjDef *OreStratum::clone() const
 526 {
 527         auto def = new OreStratum();
 528         Ore::cloneTo(def);
 529
 530         def->np_stratum_thickness = np_stratum_thickness;
 531         def->noise_stratum_thickness = nullptr; // cannot be shared, on-demand
 532         def->stratum_thickness = stratum_thickness;
 533
 534         return def;
 535 }
 536
 537
 538 void OreStratum::generate(MMVManip *vm, int mapseed, u32 blockseed,
 539         v3s16 nmin, v3s16 nmax, biome_t *biomemap)
 540 {
 541         PcgRandom pr(blockseed + 4234);
 542         MapNode n_ore(c_ore, 0, ore_param2);
 543
 544         if (flags & OREFLAG_USE_NOISE) {
 545                 if (!noise) {
 546                         int sx = nmax.X - nmin.X + 1;
 547                         int sz = nmax.Z - nmin.Z + 1;
 548                         noise = new Noise(&np, 0, sx, sz);
 549                 }
 550                 noise->perlinMap2D(nmin.X, nmin.Z);
 551         }
 552
 553         if (flags & OREFLAG_USE_NOISE2) {
 554                 if (!noise_stratum_thickness) {
 555                         int sx = nmax.X - nmin.X + 1;
 556                         int sz = nmax.Z - nmin.Z + 1;
 557                         noise_stratum_thickness = new Noise(&np_stratum_thickness, 0, sx, sz);
 558                 }
 559                 noise_stratum_thickness->perlinMap2D(nmin.X, nmin.Z);
 560         }
 561
 562         size_t index = 0;
 563
 564         for (int z = nmin.Z; z <= nmax.Z; z++)
 565         for (int x = nmin.X; x <= nmax.X; x++, index++) {
 566                 if (biomemap && !biomes.empty()) {
 567                         auto it = biomes.find(biomemap[index]);
 568                         if (it == biomes.end())
 569                                 continue;
 570                 }
 571
 572                 int y0;
 573                 int y1;
 574
 575                 if (flags & OREFLAG_USE_NOISE) {
 576                         float nhalfthick = ((flags & OREFLAG_USE_NOISE2) ?
 577                                 noise_stratum_thickness->result[index] : (float)stratum_thickness) /
 578                                 2.0f;
 579                         float nmid = noise->result[index];
 580                         y0 = MYMAX(nmin.Y, std::ceil(nmid - nhalfthick));
 581                         y1 = MYMIN(nmax.Y, nmid + nhalfthick);
 582                 } else { // Simple horizontal stratum
 583                         y0 = nmin.Y;
 584                         y1 = nmax.Y;
 585                 }
 586
 587                 for (int y = y0; y <= y1; y++) {
 588                         if (pr.range(1, clust_scarcity) != 1)
 589                                 continue;
 590
 591                         u32 i = vm->m_area.index(x, y, z);
 592                         if (!vm->m_area.contains(i))
 593                                 continue;
 594                         if (!CONTAINS(c_wherein, vm->m_data[i].getContent()))
 595                                 continue;
 596
 597                         vm->m_data[i] = n_ore;
 598                 }
 599         }
 600 }