src/mapgen_v5.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2013 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
   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
  21 #include "mapgen.h"
  22 #include "voxel.h"
  23 #include "noise.h"
  24 #include "mapblock.h"
  25 #include "mapnode.h"
  26 #include "map.h"
  27 #include "content_sao.h"
  28 #include "nodedef.h"
  29 #include "voxelalgorithms.h"
  30 #include "profiler.h"
  31 #include "settings.h" // For g_settings
  32 #include "emerge.h"
  33 #include "dungeongen.h"
  34 #include "cavegen.h"
  35 #include "treegen.h"
  36 #include "mg_biome.h"
  37 #include "mg_ore.h"
  38 #include "mg_decoration.h"
  39 #include "mapgen_v5.h"
  40 #include "util/directiontables.h"
  41
  42
  43 FlagDesc flagdesc_mapgen_v5[] = {
  44         {NULL,         0}
  45 };
  46
  47
  48 MapgenV5::MapgenV5(int mapgenid, MapgenParams *params, EmergeManager *emerge)
  49         : Mapgen(mapgenid, params, emerge)
  50 {
  51         this->m_emerge = emerge;
  52         this->bmgr     = emerge->biomemgr;
  53
  54         // amount of elements to skip for the next index
  55         // for noise/height/biome maps (not vmanip)
  56         this->ystride = csize.X;
  57         this->zstride = csize.X * (csize.Y + 2);
  58
  59         this->biomemap  = new u8[csize.X * csize.Z];
  60         this->heightmap = new s16[csize.X * csize.Z];
  61
  62         MapgenV5Params *sp = (MapgenV5Params *)params->sparams;
  63         this->spflags      = sp->spflags;
  64
  65         // Terrain noise
  66         noise_filler_depth = new Noise(&sp->np_filler_depth, seed, csize.X, csize.Z);
  67         noise_factor       = new Noise(&sp->np_factor,       seed, csize.X, csize.Z);
  68         noise_height       = new Noise(&sp->np_height,       seed, csize.X, csize.Z);
  69
  70         // 3D terrain noise
  71         noise_cave1        = new Noise(&sp->np_cave1,   seed, csize.X, csize.Y + 2, csize.Z);
  72         noise_cave2        = new Noise(&sp->np_cave2,   seed, csize.X, csize.Y + 2, csize.Z);
  73         noise_ground       = new Noise(&sp->np_ground,  seed, csize.X, csize.Y + 2, csize.Z);
  74
  75         // Biome noise
  76         noise_heat         = new Noise(&params->np_biome_heat,     seed, csize.X, csize.Z);
  77         noise_humidity     = new Noise(&params->np_biome_humidity, seed, csize.X, csize.Z);
  78
  79         //// Resolve nodes to be used
  80         INodeDefManager *ndef = emerge->ndef;
  81
  82         c_stone                = ndef->getId("mapgen_stone");
  83         c_water_source         = ndef->getId("mapgen_water_source");
  84         c_lava_source          = ndef->getId("mapgen_lava_source");
  85         c_desert_stone         = ndef->getId("mapgen_desert_stone");
  86         c_ice                  = ndef->getId("mapgen_ice");
  87
  88         c_cobble               = ndef->getId("mapgen_cobble");
  89         c_stair_cobble         = ndef->getId("mapgen_stair_cobble");
  90         c_mossycobble          = ndef->getId("mapgen_mossycobble");
  91         c_sandstonebrick       = ndef->getId("mapgen_sandstonebrick");
  92         c_stair_sandstonebrick = ndef->getId("mapgen_stair_sandstonebrick");
  93
  94         if (c_ice == CONTENT_IGNORE)
  95                 c_ice = CONTENT_AIR;
  96         if (c_mossycobble == CONTENT_IGNORE)
  97                 c_mossycobble = c_cobble;
  98         if (c_stair_cobble == CONTENT_IGNORE)
  99                 c_stair_cobble = c_cobble;
 100         if (c_sandstonebrick == CONTENT_IGNORE)
 101                 c_sandstonebrick = c_desert_stone;
 102         if (c_stair_sandstonebrick == CONTENT_IGNORE)
 103                 c_stair_sandstonebrick = c_sandstonebrick;
 104 }
 105
 106
 107 MapgenV5::~MapgenV5()
 108 {
 109         delete noise_filler_depth;
 110         delete noise_factor;
 111         delete noise_height;
 112         delete noise_cave1;
 113         delete noise_cave2;
 114         delete noise_ground;
 115
 116         delete noise_heat;
 117         delete noise_humidity;
 118
 119         delete[] heightmap;
 120         delete[] biomemap;
 121 }
 122
 123
 124 MapgenV5Params::MapgenV5Params()
 125 {
 126         spflags = 0;
 127
 128         np_filler_depth = NoiseParams(0, 1,  v3f(150, 150, 150), 261,    4, 0.7,  2.0);
 129         np_factor       = NoiseParams(0, 1,  v3f(250, 250, 250), 920381, 3, 0.45, 2.0);
 130         np_height       = NoiseParams(0, 10, v3f(250, 250, 250), 84174,  4, 0.5,  2.0);
 131         np_cave1        = NoiseParams(0, 12, v3f(50,  50,  50),  52534,  4, 0.5,  2.0);
 132         np_cave2        = NoiseParams(0, 12, v3f(50,  50,  50),  10325,  4, 0.5,  2.0);
 133         np_ground       = NoiseParams(0, 40, v3f(80,  80,  80),  983240, 4, 0.55, 2.0, NOISE_FLAG_EASED);
 134 }
 135
 136
 137 //#define CAVE_NOISE_SCALE 12.0
 138 //#define CAVE_NOISE_THRESHOLD (1.5/CAVE_NOISE_SCALE) = 0.125
 139
 140
 141 void MapgenV5Params::readParams(const Settings *settings)
 142 {
 143         settings->getFlagStrNoEx("mgv5_spflags", spflags, flagdesc_mapgen_v5);
 144
 145         settings->getNoiseParams("mgv5_np_filler_depth", np_filler_depth);
 146         settings->getNoiseParams("mgv5_np_factor",       np_factor);
 147         settings->getNoiseParams("mgv5_np_height",       np_height);
 148         settings->getNoiseParams("mgv5_np_cave1",        np_cave1);
 149         settings->getNoiseParams("mgv5_np_cave2",        np_cave2);
 150         settings->getNoiseParams("mgv5_np_ground",       np_ground);
 151 }
 152
 153
 154 void MapgenV5Params::writeParams(Settings *settings) const
 155 {
 156         settings->setFlagStr("mgv5_spflags", spflags, flagdesc_mapgen_v5, (u32)-1);
 157
 158         settings->setNoiseParams("mgv5_np_filler_depth", np_filler_depth);
 159         settings->setNoiseParams("mgv5_np_factor",       np_factor);
 160         settings->setNoiseParams("mgv5_np_height",       np_height);
 161         settings->setNoiseParams("mgv5_np_cave1",        np_cave1);
 162         settings->setNoiseParams("mgv5_np_cave2",        np_cave2);
 163         settings->setNoiseParams("mgv5_np_ground",       np_ground);
 164 }
 165
 166
 167 int MapgenV5::getGroundLevelAtPoint(v2s16 p)
 168 {
 169         //TimeTaker t("getGroundLevelAtPoint", NULL, PRECISION_MICRO);
 170
 171         float f = 0.55 + NoisePerlin2D(&noise_factor->np, p.X, p.Y, seed);
 172         if (f < 0.01)
 173                 f = 0.01;
 174         else if (f >= 1.0)
 175                 f *= 1.6;
 176         float h = NoisePerlin2D(&noise_height->np, p.X, p.Y, seed);
 177
 178         s16 search_top = water_level + 15;
 179         s16 search_base = water_level;
 180
 181         s16 level = -31000;
 182         for (s16 y = search_top; y >= search_base; y--) {
 183                 float n_ground = NoisePerlin3D(&noise_ground->np, p.X, y, p.Y, seed);
 184                 if (n_ground * f > y - h) {
 185                         if (y >= search_top - 7)
 186                                 break;
 187                         else
 188                                 level = y;
 189                                 break;
 190                 }
 191         }
 192
 193         //printf("getGroundLevelAtPoint: %dus\n", t.stop());
 194         return level;
 195 }
 196
 197
 198 void MapgenV5::makeChunk(BlockMakeData *data)
 199 {
 200         // Pre-conditions
 201         assert(data->vmanip);
 202         assert(data->nodedef);
 203         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 204                 data->blockpos_requested.Y >= data->blockpos_min.Y &&
 205                 data->blockpos_requested.Z >= data->blockpos_min.Z);
 206         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 207                 data->blockpos_requested.Y <= data->blockpos_max.Y &&
 208                 data->blockpos_requested.Z <= data->blockpos_max.Z);
 209
 210         generating = true;
 211         vm   = data->vmanip;
 212         ndef = data->nodedef;
 213         //TimeTaker t("makeChunk");
 214
 215         v3s16 blockpos_min = data->blockpos_min;
 216         v3s16 blockpos_max = data->blockpos_max;
 217         node_min = blockpos_min * MAP_BLOCKSIZE;
 218         node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 219         full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
 220         full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 221
 222         // Create a block-specific seed
 223         blockseed = getBlockSeed2(full_node_min, seed);
 224
 225         // Make some noise
 226         calculateNoise();
 227
 228         // Generate base terrain
 229         s16 stone_surface_max_y = generateBaseTerrain();
 230
 231         // Create heightmap
 232         updateHeightmap(node_min, node_max);
 233
 234         // Create biomemap at heightmap surface
 235         bmgr->calcBiomes(csize.X, csize.Z, noise_heat->result,
 236                 noise_humidity->result, heightmap, biomemap);
 237
 238         // Actually place the biome-specific nodes
 239         bool desert_stone = generateBiomes(noise_heat->result, noise_humidity->result);
 240
 241         // Generate caves
 242         if ((flags & MG_CAVES) && (stone_surface_max_y >= node_min.Y))
 243                 generateCaves(stone_surface_max_y);
 244
 245         // Generate dungeons and desert temples
 246         if ((flags & MG_DUNGEONS) && (stone_surface_max_y >= node_min.Y)) {
 247                 DungeonParams dp;
 248
 249                 dp.np_rarity  = nparams_dungeon_rarity;
 250                 dp.np_density = nparams_dungeon_density;
 251                 dp.np_wetness = nparams_dungeon_wetness;
 252                 dp.c_water    = c_water_source;
 253                 if (desert_stone) {
 254                         dp.c_cobble = c_desert_stone;
 255                         dp.c_moss   = c_desert_stone;
 256                         dp.c_stair  = c_desert_stone;
 257
 258                         dp.diagonal_dirs = true;
 259                         dp.mossratio     = 0.0;
 260                         dp.holesize      = v3s16(2, 3, 2);
 261                         dp.roomsize      = v3s16(2, 5, 2);
 262                         dp.notifytype    = GENNOTIFY_TEMPLE;
 263                 } else {
 264                         dp.c_cobble = c_cobble;
 265                         dp.c_moss   = c_mossycobble;
 266                         dp.c_stair  = c_stair_cobble;
 267
 268                         dp.diagonal_dirs = false;
 269                         dp.mossratio     = 3.0;
 270                         dp.holesize      = v3s16(1, 2, 1);
 271                         dp.roomsize      = v3s16(0, 0, 0);
 272                         dp.notifytype    = GENNOTIFY_DUNGEON;
 273                 }
 274
 275                 DungeonGen dgen(this, &dp);
 276                 dgen.generate(blockseed, full_node_min, full_node_max);
 277         }
 278
 279         // Generate the registered decorations
 280         m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
 281
 282         // Generate the registered ores
 283         m_emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
 284
 285         // Sprinkle some dust on top after everything else was generated
 286         dustTopNodes();
 287
 288         //printf("makeChunk: %dms\n", t.stop());
 289
 290         // Add top and bottom side of water to transforming_liquid queue
 291         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 292
 293         // Calculate lighting
 294         if (flags & MG_LIGHT) {
 295                 calcLighting(node_min - v3s16(0, 1, 0), node_max + v3s16(0, 1, 0),
 296                         full_node_min, full_node_max);
 297         }
 298
 299         this->generating = false;
 300 }
 301
 302
 303 void MapgenV5::calculateNoise()
 304 {
 305         //TimeTaker t("calculateNoise", NULL, PRECISION_MICRO);
 306         int x = node_min.X;
 307         int y = node_min.Y - 1;
 308         int z = node_min.Z;
 309
 310         noise_factor->perlinMap2D(x, z);
 311         noise_height->perlinMap2D(x, z);
 312         noise_ground->perlinMap3D(x, y, z);
 313
 314         if (flags & MG_CAVES) {
 315                 noise_cave1->perlinMap3D(x, y, z);
 316                 noise_cave2->perlinMap3D(x, y, z);
 317         }
 318
 319         if (node_max.Y >= water_level) {
 320                 noise_filler_depth->perlinMap2D(x, z);
 321                 noise_heat->perlinMap2D(x, z);
 322                 noise_humidity->perlinMap2D(x, z);
 323         }
 324
 325         //printf("calculateNoise: %dus\n", t.stop());
 326 }
 327
 328
 329 //bool is_cave(u32 index) {
 330 //      double d1 = contour(noise_cave1->result[index]);
 331 //      double d2 = contour(noise_cave2->result[index]);
 332 //      return d1*d2 > CAVE_NOISE_THRESHOLD;
 333 //}
 334
 335 //bool val_is_ground(v3s16 p, u32 index, u32 index2d) {
 336 //      double f = 0.55 + noise_factor->result[index2d];
 337 //      if(f < 0.01)
 338 //              f = 0.01;
 339 //      else if(f >= 1.0)
 340 //              f *= 1.6;
 341 //      double h = WATER_LEVEL + 10 * noise_height->result[index2d];
 342 //      return (noise_ground->result[index] * f > (double)p.Y - h);
 343 //}
 344
 345
 346 int MapgenV5::generateBaseTerrain()
 347 {
 348         u32 index = 0;
 349         u32 index2d = 0;
 350         int stone_surface_max_y = -MAP_GENERATION_LIMIT;
 351
 352         for (s16 z=node_min.Z; z<=node_max.Z; z++) {
 353                 for (s16 y=node_min.Y - 1; y<=node_max.Y + 1; y++) {
 354                         u32 i = vm->m_area.index(node_min.X, y, z);
 355                         for (s16 x=node_min.X; x<=node_max.X; x++, i++, index++, index2d++) {
 356                                 if (vm->m_data[i].getContent() != CONTENT_IGNORE)
 357                                         continue;
 358
 359                                 float f = 0.55 + noise_factor->result[index2d];
 360                                 if (f < 0.01)
 361                                         f = 0.01;
 362                                 else if (f >= 1.0)
 363                                         f *= 1.6;
 364                                 float h = noise_height->result[index2d];
 365
 366                                 if (noise_ground->result[index] * f < y - h) {
 367                                         if (y <= water_level)
 368                                                 vm->m_data[i] = MapNode(c_water_source);
 369                                         else
 370                                                 vm->m_data[i] = MapNode(CONTENT_AIR);
 371                                 } else {
 372                                         vm->m_data[i] = MapNode(c_stone);
 373                                         if (y > stone_surface_max_y)
 374                                                 stone_surface_max_y = y;
 375                                 }
 376                         }
 377                         index2d -= ystride;
 378                 }
 379                 index2d += ystride;
 380         }
 381
 382         return stone_surface_max_y;
 383 }
 384
 385
 386 bool MapgenV5::generateBiomes(float *heat_map, float *humidity_map)
 387 {
 388         if (node_max.Y < water_level)
 389                 return false;
 390
 391         v3s16 em = vm->m_area.getExtent();
 392         u32 index = 0;
 393         bool desert_stone = false;
 394
 395         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 396         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 397                 Biome *biome = NULL;
 398                 s16 dfiller = 0;
 399                 s16 y0_top = 0;
 400                 s16 y0_filler = 0;
 401                 s16 depth_water_top = 0;
 402
 403                 s16 nplaced = 0;
 404                 u32 i = vm->m_area.index(x, node_max.Y, z);
 405
 406                 content_t c_above = vm->m_data[i + em.X].getContent();
 407                 bool have_air = c_above == CONTENT_AIR;
 408
 409                 for (s16 y = node_max.Y; y >= node_min.Y; y--) {
 410                         content_t c = vm->m_data[i].getContent();
 411
 412                         if (c != CONTENT_IGNORE && c != CONTENT_AIR &&
 413                                         (y == node_max.Y || have_air)) {
 414                                 biome = bmgr->getBiome(heat_map[index], humidity_map[index], y);
 415                                 dfiller = biome->depth_filler + noise_filler_depth->result[index];
 416                                 y0_top = biome->depth_top;
 417                                 y0_filler = biome->depth_top + dfiller;
 418                                 depth_water_top = biome->depth_water_top;
 419
 420                                 if (biome->c_stone == c_desert_stone)
 421                                         desert_stone = true;
 422                         }
 423
 424                         if (c == c_stone && have_air) {
 425                                 content_t c_below = vm->m_data[i - em.X].getContent();
 426
 427                                 if (c_below != CONTENT_AIR && c_below != c_water_source) {
 428                                         if (nplaced < y0_top) {
 429                                                 vm->m_data[i] = MapNode(biome->c_top);
 430                                                 nplaced++;
 431                                         } else if (nplaced < y0_filler && nplaced >= y0_top) {
 432                                                 vm->m_data[i] = MapNode(biome->c_filler);
 433                                                 nplaced++;
 434                                         } else if (c == c_stone) {
 435                                                 have_air = false;
 436                                                 nplaced  = 0;
 437                                                 vm->m_data[i] = MapNode(biome->c_stone);
 438                                         } else {
 439                                                 have_air = false;
 440                                                 nplaced  = 0;
 441                                         }
 442                                 } else if (c == c_stone) {
 443                                         have_air = false;
 444                                         nplaced = 0;
 445                                         vm->m_data[i] = MapNode(biome->c_stone);
 446                                 }
 447                         } else if (c == c_stone) {
 448                                 have_air = false;
 449                                 nplaced = 0;
 450                                 vm->m_data[i] = MapNode(biome->c_stone);
 451                         } else if (c == c_water_source) {
 452                                 have_air = true;
 453                                 nplaced = 0;
 454                                 if (y > water_level - depth_water_top)
 455                                         vm->m_data[i] = MapNode(biome->c_water_top);
 456                                 else
 457                                         vm->m_data[i] = MapNode(biome->c_water);
 458                         } else if (c == CONTENT_AIR) {
 459                                 have_air = true;
 460                                 nplaced = 0;
 461                         }
 462
 463                         vm->m_area.add_y(em, i, -1);
 464                 }
 465         }
 466
 467         return desert_stone;
 468 }
 469
 470
 471 void MapgenV5::generateCaves(int max_stone_y)
 472 {
 473         u32 index = 0;
 474         u32 index2d = 0;
 475
 476         for (s16 z=node_min.Z; z<=node_max.Z; z++) {
 477                 for (s16 y=node_min.Y - 1; y<=node_max.Y + 1; y++) {
 478                         u32 i = vm->m_area.index(node_min.X, y, z);
 479                         for (s16 x=node_min.X; x<=node_max.X; x++, i++, index++, index2d++) {
 480                                 float d1 = contour(noise_cave1->result[index]);
 481                                 float d2 = contour(noise_cave2->result[index]);
 482                                 if (d1*d2 > 0.125) {
 483                                         Biome *biome = (Biome *)bmgr->getRaw(biomemap[index2d]);
 484                                         content_t c = vm->m_data[i].getContent();
 485                                         if (!ndef->get(c).is_ground_content || c == CONTENT_AIR ||
 486                                                         (y <= water_level &&
 487                                                         c != biome->c_stone &&
 488                                                         c != c_stone))
 489                                                 continue;
 490
 491                                         vm->m_data[i] = MapNode(CONTENT_AIR);
 492                                 }
 493                         }
 494                         index2d -= ystride;
 495                 }
 496                 index2d += ystride;
 497         }
 498
 499         if (node_max.Y > LARGE_CAVE_DEPTH)
 500                 return;
 501
 502         PseudoRandom ps(blockseed + 21343);
 503         u32 bruises_count = (ps.range(1, 4) == 1) ? ps.range(1, 2) : 0;
 504         for (u32 i = 0; i < bruises_count; i++) {
 505                 CaveV5 cave(this, &ps);
 506                 cave.makeCave(node_min, node_max, max_stone_y);
 507         }
 508 }
 509
 510
 511 void MapgenV5::dustTopNodes()
 512 {
 513         if (node_max.Y < water_level)
 514                 return;
 515
 516         v3s16 em = vm->m_area.getExtent();
 517         u32 index = 0;
 518
 519         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 520         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 521                 Biome *biome = (Biome *)bmgr->getRaw(biomemap[index]);
 522
 523                 if (biome->c_dust == CONTENT_IGNORE)
 524                         continue;
 525
 526                 u32 vi = vm->m_area.index(x, full_node_max.Y, z);
 527                 content_t c_full_max = vm->m_data[vi].getContent();
 528                 s16 y_start;
 529
 530                 if (c_full_max == CONTENT_AIR) {
 531                         y_start = full_node_max.Y - 1;
 532                 } else if (c_full_max == CONTENT_IGNORE) {
 533                         vi = vm->m_area.index(x, node_max.Y + 1, z);
 534                         content_t c_max = vm->m_data[vi].getContent();
 535
 536                         if (c_max == CONTENT_AIR)
 537                                 y_start = node_max.Y;
 538                         else
 539                                 continue;
 540                 } else {
 541                         continue;
 542                 }
 543
 544                 vi = vm->m_area.index(x, y_start, z);
 545                 for (s16 y = y_start; y >= node_min.Y - 1; y--) {
 546                         if (vm->m_data[vi].getContent() != CONTENT_AIR)
 547                                 break;
 548
 549                         vm->m_area.add_y(em, vi, -1);
 550                 }
 551
 552                 content_t c = vm->m_data[vi].getContent();
 553                 if (!ndef->get(c).buildable_to && c != CONTENT_IGNORE && c != biome->c_dust) {
 554                         vm->m_area.add_y(em, vi, 1);
 555                         vm->m_data[vi] = MapNode(biome->c_dust);
 556                 }
 557         }
 558 }
 559