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 "main.h" // For g_profiler
  33 #include "emerge.h"
  34 #include "dungeongen.h"
  35 #include "cavegen.h"
  36 #include "treegen.h"
  37 #include "mg_biome.h"
  38 #include "mg_ore.h"
  39 #include "mg_decoration.h"
  40 #include "mapgen_v5.h"
  41 #include "util/directiontables.h"
  42
  43
  44 FlagDesc flagdesc_mapgen_v5[] = {
  45         {NULL,         0}
  46 };
  47
  48
  49 MapgenV5::MapgenV5(int mapgenid, MapgenParams *params, EmergeManager *emerge)
  50         : Mapgen(mapgenid, params, emerge)
  51 {
  52         this->m_emerge = emerge;
  53         this->bmgr     = emerge->biomemgr;
  54
  55         // amount of elements to skip for the next index
  56         // for noise/height/biome maps (not vmanip)
  57         this->ystride = csize.X;
  58         this->zstride = csize.X * (csize.Y + 2);
  59
  60         this->biomemap  = new u8[csize.X * csize.Z];
  61         this->heightmap = new s16[csize.X * csize.Z];
  62
  63         MapgenV5Params *sp = (MapgenV5Params *)params->sparams;
  64         this->spflags      = sp->spflags;
  65
  66         // Terrain noise
  67         noise_filler_depth = new Noise(&sp->np_filler_depth, seed, csize.X, csize.Z);
  68         noise_factor       = new Noise(&sp->np_factor,       seed, csize.X, csize.Z);
  69         noise_height       = new Noise(&sp->np_height,       seed, csize.X, csize.Z);
  70
  71         // 3D terrain noise
  72         noise_cave1        = new Noise(&sp->np_cave1,   seed, csize.X, csize.Y + 2, csize.Z);
  73         noise_cave2        = new Noise(&sp->np_cave2,   seed, csize.X, csize.Y + 2, csize.Z);
  74         noise_ground       = new Noise(&sp->np_ground,  seed, csize.X, csize.Y + 2, csize.Z);
  75
  76         // Biome noise
  77         noise_heat         = new Noise(&params->np_biome_heat,     seed, csize.X, csize.Z);
  78         noise_humidity     = new Noise(&params->np_biome_humidity, seed, csize.X, csize.Z);
  79
  80         //// Resolve nodes to be used
  81         INodeDefManager *ndef = emerge->ndef;
  82
  83         c_stone           = ndef->getId("mapgen_stone");
  84         c_dirt            = ndef->getId("mapgen_dirt");
  85         c_dirt_with_grass = ndef->getId("mapgen_dirt_with_grass");
  86         c_sand            = ndef->getId("mapgen_sand");
  87         c_water_source    = ndef->getId("mapgen_water_source");
  88         c_lava_source     = ndef->getId("mapgen_lava_source");
  89         c_gravel          = ndef->getId("mapgen_gravel");
  90         c_cobble          = ndef->getId("mapgen_cobble");
  91         c_ice             = ndef->getId("default:ice");
  92         c_desert_stone    = ndef->getId("mapgen_desert_stone");
  93         c_mossycobble     = ndef->getId("mapgen_mossycobble");
  94         c_sandbrick       = ndef->getId("mapgen_sandstonebrick");
  95         c_stair_cobble    = ndef->getId("mapgen_stair_cobble");
  96         c_stair_sandstone = ndef->getId("mapgen_stair_sandstone");
  97         if (c_ice == CONTENT_IGNORE)
  98                 c_ice = CONTENT_AIR;
  99         if (c_mossycobble == CONTENT_IGNORE)
 100                 c_mossycobble = c_cobble;
 101         if (c_sandbrick == CONTENT_IGNORE)
 102                 c_sandbrick = c_desert_stone;
 103         if (c_stair_cobble == CONTENT_IGNORE)
 104                 c_stair_cobble = c_cobble;
 105         if (c_stair_sandstone == CONTENT_IGNORE)
 106                 c_stair_sandstone = c_sandbrick;
 107 }
 108
 109
 110 MapgenV5::~MapgenV5()
 111 {
 112         delete noise_filler_depth;
 113         delete noise_factor;
 114         delete noise_height;
 115         delete noise_cave1;
 116         delete noise_cave2;
 117         delete noise_ground;
 118
 119         delete noise_heat;
 120         delete noise_humidity;
 121
 122         delete[] heightmap;
 123         delete[] biomemap;
 124 }
 125
 126
 127 MapgenV5Params::MapgenV5Params()
 128 {
 129         spflags = 0;
 130
 131         np_filler_depth = NoiseParams(0, 1,  v3f(150, 150, 150), 261,    4, 0.7,  2.0);
 132         np_factor       = NoiseParams(0, 1,  v3f(250, 250, 250), 920381, 3, 0.45, 2.0);
 133         np_height       = NoiseParams(0, 10, v3f(250, 250, 250), 84174,  4, 0.5,  2.0);
 134         np_cave1        = NoiseParams(0, 12, v3f(50,  50,  50),  52534,  4, 0.5,  2.0);
 135         np_cave2        = NoiseParams(0, 12, v3f(50,  50,  50),  10325,  4, 0.5,  2.0);
 136         np_ground       = NoiseParams(0, 40, v3f(80,  80,  80),  983240, 4, 0.55, 2.0, NOISE_FLAG_EASED);
 137 }
 138
 139
 140 //#define CAVE_NOISE_SCALE 12.0
 141 //#define CAVE_NOISE_THRESHOLD (1.5/CAVE_NOISE_SCALE) = 0.125
 142
 143
 144 void MapgenV5Params::readParams(const Settings *settings)
 145 {
 146         settings->getFlagStrNoEx("mgv5_spflags", spflags, flagdesc_mapgen_v5);
 147
 148         settings->getNoiseParams("mgv5_np_filler_depth", np_filler_depth);
 149         settings->getNoiseParams("mgv5_np_factor",       np_factor);
 150         settings->getNoiseParams("mgv5_np_height",       np_height);
 151         settings->getNoiseParams("mgv5_np_cave1",        np_cave1);
 152         settings->getNoiseParams("mgv5_np_cave2",        np_cave2);
 153         settings->getNoiseParams("mgv5_np_ground",       np_ground);
 154 }
 155
 156
 157 void MapgenV5Params::writeParams(Settings *settings) const
 158 {
 159         settings->setFlagStr("mgv5_spflags", spflags, flagdesc_mapgen_v5, (u32)-1);
 160
 161         settings->setNoiseParams("mgv5_np_filler_depth", np_filler_depth);
 162         settings->setNoiseParams("mgv5_np_factor",       np_factor);
 163         settings->setNoiseParams("mgv5_np_height",       np_height);
 164         settings->setNoiseParams("mgv5_np_cave1",        np_cave1);
 165         settings->setNoiseParams("mgv5_np_cave2",        np_cave2);
 166         settings->setNoiseParams("mgv5_np_ground",       np_ground);
 167 }
 168
 169
 170 int MapgenV5::getGroundLevelAtPoint(v2s16 p)
 171 {
 172         //TimeTaker t("getGroundLevelAtPoint", NULL, PRECISION_MICRO);
 173
 174         float f = 0.55 + NoisePerlin2D(&noise_factor->np, p.X, p.Y, seed);
 175         if (f < 0.01)
 176                 f = 0.01;
 177         else if (f >= 1.0)
 178                 f *= 1.6;
 179         float h = water_level + NoisePerlin2D(&noise_height->np, p.X, p.Y, seed);
 180
 181         s16 search_top = water_level + 15;
 182         s16 search_base = water_level;
 183
 184         s16 level = -31000;
 185         for (s16 y = search_top; y >= search_base; y--) {
 186                 float n_ground = NoisePerlin3D(&noise_ground->np, p.X, y, p.Y, seed);
 187                 if (n_ground * f > y - h) {
 188                         if (y >= search_top - 7)
 189                                 break;
 190                         else
 191                                 level = y;
 192                                 break;
 193                 }
 194         }
 195
 196         //printf("getGroundLevelAtPoint: %dus\n", t.stop());
 197         return level;
 198 }
 199
 200
 201 void MapgenV5::makeChunk(BlockMakeData *data)
 202 {
 203         // Pre-conditions
 204         assert(data->vmanip);
 205         assert(data->nodedef);
 206         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 207                 data->blockpos_requested.Y >= data->blockpos_min.Y &&
 208                 data->blockpos_requested.Z >= data->blockpos_min.Z);
 209         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 210                 data->blockpos_requested.Y <= data->blockpos_max.Y &&
 211                 data->blockpos_requested.Z <= data->blockpos_max.Z);
 212
 213         generating = true;
 214         vm   = data->vmanip;
 215         ndef = data->nodedef;
 216         //TimeTaker t("makeChunk");
 217
 218         v3s16 blockpos_min = data->blockpos_min;
 219         v3s16 blockpos_max = data->blockpos_max;
 220         node_min = blockpos_min * MAP_BLOCKSIZE;
 221         node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 222         full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
 223         full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 224
 225         // Create a block-specific seed
 226         blockseed = getBlockSeed2(full_node_min, seed);
 227
 228         // Make some noise
 229         calculateNoise();
 230
 231         // Generate base terrain
 232         s16 stone_surface_max_y = generateBaseTerrain();
 233
 234         // Create heightmap
 235         updateHeightmap(node_min, node_max);
 236
 237         // Create biomemap at heightmap surface
 238         bmgr->calcBiomes(csize.X, csize.Z, noise_heat->result,
 239                 noise_humidity->result, heightmap, biomemap);
 240
 241         // Actually place the biome-specific nodes
 242         bool desert_stone = generateBiomes(noise_heat->result, noise_humidity->result);
 243
 244         // Generate caves
 245         if ((flags & MG_CAVES) && (stone_surface_max_y >= node_min.Y))
 246                 generateCaves(stone_surface_max_y);
 247
 248         // Generate dungeons and desert temples
 249         if ((flags & MG_DUNGEONS) && (stone_surface_max_y >= node_min.Y)) {
 250                 DungeonParams dp;
 251
 252                 dp.np_rarity  = nparams_dungeon_rarity;
 253                 dp.np_density = nparams_dungeon_density;
 254                 dp.np_wetness = nparams_dungeon_wetness;
 255                 dp.c_water = c_water_source;
 256                 if (desert_stone) {
 257                         dp.c_cobble  = c_sandbrick;
 258                         dp.c_moss    = c_sandbrick; // should make this 'cracked sandstone' later
 259                         dp.c_stair   = c_stair_sandstone;
 260
 261                         dp.diagonal_dirs = true;
 262                         dp.mossratio  = 0.0;
 263                         dp.holesize   = v3s16(2, 3, 2);
 264                         dp.roomsize   = v3s16(2, 5, 2);
 265                         dp.notifytype = GENNOTIFY_TEMPLE;
 266                 } else {
 267                         dp.c_cobble  = c_cobble;
 268                         dp.c_moss    = c_mossycobble;
 269                         dp.c_stair   = c_stair_cobble;
 270
 271                         dp.diagonal_dirs = false;
 272                         dp.mossratio  = 3.0;
 273                         dp.holesize   = v3s16(1, 2, 1);
 274                         dp.roomsize   = v3s16(0, 0, 0);
 275                         dp.notifytype = GENNOTIFY_DUNGEON;
 276                 }
 277
 278                 DungeonGen dgen(this, &dp);
 279                 dgen.generate(blockseed, full_node_min, full_node_max);
 280         }
 281
 282         // Generate the registered decorations
 283         m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
 284
 285         // Generate the registered ores
 286         m_emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
 287
 288         // Sprinkle some dust on top after everything else was generated
 289         dustTopNodes();
 290
 291         //printf("makeChunk: %dms\n", t.stop());
 292
 293         // Add top and bottom side of water to transforming_liquid queue
 294         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 295
 296         // Calculate lighting
 297         if (flags & MG_LIGHT) {
 298                 calcLighting(node_min - v3s16(0, 1, 0), node_max + v3s16(0, 1, 0),
 299                         full_node_min, full_node_max);
 300         }
 301
 302         this->generating = false;
 303 }
 304
 305
 306 void MapgenV5::calculateNoise()
 307 {
 308         //TimeTaker t("calculateNoise", NULL, PRECISION_MICRO);
 309         int x = node_min.X;
 310         int y = node_min.Y - 1;
 311         int z = node_min.Z;
 312
 313         noise_factor->perlinMap2D(x, z);
 314         noise_height->perlinMap2D(x, z);
 315         noise_ground->perlinMap3D(x, y, z);
 316
 317         if (flags & MG_CAVES) {
 318                 noise_cave1->perlinMap3D(x, y, z);
 319                 noise_cave2->perlinMap3D(x, y, z);
 320         }
 321
 322         if (node_max.Y >= water_level) {
 323                 noise_filler_depth->perlinMap2D(x, z);
 324                 noise_heat->perlinMap2D(x, z);
 325                 noise_humidity->perlinMap2D(x, z);
 326         }
 327
 328         //printf("calculateNoise: %dus\n", t.stop());
 329 }
 330
 331
 332 //bool is_cave(u32 index) {
 333 //      double d1 = contour(noise_cave1->result[index]);
 334 //      double d2 = contour(noise_cave2->result[index]);
 335 //      return d1*d2 > CAVE_NOISE_THRESHOLD;
 336 //}
 337
 338 //bool val_is_ground(v3s16 p, u32 index, u32 index2d) {
 339 //      double f = 0.55 + noise_factor->result[index2d];
 340 //      if(f < 0.01)
 341 //              f = 0.01;
 342 //      else if(f >= 1.0)
 343 //              f *= 1.6;
 344 //      double h = WATER_LEVEL + 10 * noise_height->result[index2d];
 345 //      return (noise_ground->result[index] * f > (double)p.Y - h);
 346 //}
 347
 348
 349 int MapgenV5::generateBaseTerrain()
 350 {
 351         u32 index = 0;
 352         u32 index2d = 0;
 353         int stone_surface_max_y = -MAP_GENERATION_LIMIT;
 354
 355         for (s16 z=node_min.Z; z<=node_max.Z; z++) {
 356                 for (s16 y=node_min.Y - 1; y<=node_max.Y + 1; y++) {
 357                         u32 i = vm->m_area.index(node_min.X, y, z);
 358                         for (s16 x=node_min.X; x<=node_max.X; x++, i++, index++, index2d++) {
 359                                 if (vm->m_data[i].getContent() != CONTENT_IGNORE)
 360                                         continue;
 361
 362                                 float f = 0.55 + noise_factor->result[index2d];
 363                                 if (f < 0.01)
 364                                         f = 0.01;
 365                                 else if (f >= 1.0)
 366                                         f *= 1.6;
 367                                 float h = noise_height->result[index2d];
 368
 369                                 if (noise_ground->result[index] * f < y - h) {
 370                                         if (y <= water_level)
 371                                                 vm->m_data[i] = MapNode(c_water_source);
 372                                         else
 373                                                 vm->m_data[i] = MapNode(CONTENT_AIR);
 374                                 } else {
 375                                         vm->m_data[i] = MapNode(c_stone);
 376                                         if (y > stone_surface_max_y)
 377                                                 stone_surface_max_y = y;
 378                                 }
 379                         }
 380                         index2d -= ystride;
 381                 }
 382                 index2d += ystride;
 383         }
 384
 385         return stone_surface_max_y;
 386 }
 387
 388
 389 bool MapgenV5::generateBiomes(float *heat_map, float *humidity_map)
 390 {
 391         if (node_max.Y < water_level)
 392                 return false;
 393
 394         v3s16 em = vm->m_area.getExtent();
 395         u32 index = 0;
 396         bool desert_stone = false;
 397
 398         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 399         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 400                 Biome *biome = NULL;
 401                 s16 dfiller = 0;
 402                 s16 y0_top = 0;
 403                 s16 y0_filler = 0;
 404                 s16 depth_water_top = 0;
 405
 406                 s16 nplaced = 0;
 407                 u32 i = vm->m_area.index(x, node_max.Y, z);
 408
 409                 content_t c_above = vm->m_data[i + em.X].getContent();
 410                 bool have_air = c_above == CONTENT_AIR;
 411
 412                 for (s16 y = node_max.Y; y >= node_min.Y; y--) {
 413                         content_t c = vm->m_data[i].getContent();
 414
 415                         if (c != CONTENT_IGNORE && c != CONTENT_AIR && (y == node_max.Y || have_air)) {
 416                                 biome           = bmgr->getBiome(heat_map[index], humidity_map[index], y);
 417                                 dfiller         = biome->depth_filler + noise_filler_depth->result[index];
 418                                 y0_top          = biome->depth_top;
 419                                 y0_filler       = biome->depth_top + dfiller;
 420                                 depth_water_top = biome->depth_water_top;
 421
 422                                 if (biome->c_stone == c_desert_stone)
 423                                         desert_stone = true;
 424                         }
 425
 426                         if (c == c_stone && have_air) {
 427                                 content_t c_below = vm->m_data[i - em.X].getContent();
 428
 429                                 if (c_below != CONTENT_AIR) {
 430                                         if (nplaced < y0_top) {
 431                                                 vm->m_data[i] = MapNode(biome->c_top);
 432                                                 nplaced++;
 433                                         } else if (nplaced < y0_filler && nplaced >= y0_top) {
 434                                                 vm->m_data[i] = MapNode(biome->c_filler);
 435                                                 nplaced++;
 436                                         } else if (c == c_stone) {
 437                                                 have_air = false;
 438                                                 nplaced  = 0;
 439                                                 vm->m_data[i] = MapNode(biome->c_stone);
 440                                         } else {
 441                                                 have_air = false;
 442                                                 nplaced  = 0;
 443                                         }
 444                                 } else if (c == c_stone) {
 445                                         have_air = false;
 446                                         nplaced = 0;
 447                                         vm->m_data[i] = MapNode(biome->c_stone);
 448                                 }
 449                         } else if (c == c_stone) {
 450                                 have_air = false;
 451                                 nplaced = 0;
 452                                 vm->m_data[i] = MapNode(biome->c_stone);
 453                         } else if (c == c_water_source) {
 454                                 have_air = true;
 455                                 nplaced = 0;
 456                                 if (y > water_level - depth_water_top)
 457                                         vm->m_data[i] = MapNode(biome->c_water_top);
 458                                 else
 459                                         vm->m_data[i] = MapNode(biome->c_water);
 460                         } else if (c == CONTENT_AIR) {
 461                                 have_air = true;
 462                                 nplaced = 0;
 463                         }
 464
 465                         vm->m_area.add_y(em, i, -1);
 466                 }
 467         }
 468
 469         return desert_stone;
 470 }
 471
 472
 473 void MapgenV5::generateCaves(int max_stone_y)
 474 {
 475         u32 index = 0;
 476         u32 index2d = 0;
 477
 478         for (s16 z=node_min.Z; z<=node_max.Z; z++) {
 479                 for (s16 y=node_min.Y - 1; y<=node_max.Y + 1; y++) {
 480                         u32 i = vm->m_area.index(node_min.X, y, z);
 481                         for (s16 x=node_min.X; x<=node_max.X; x++, i++, index++, index2d++) {
 482                                 Biome *biome = (Biome *)bmgr->get(biomemap[index2d]);
 483                                 content_t c = vm->m_data[i].getContent();
 484                                 if (c == CONTENT_AIR
 485                                                 || (y <= water_level
 486                                                 && c != biome->c_stone
 487                                                 && c != c_stone))
 488                                         continue;
 489
 490                                 float d1 = contour(noise_cave1->result[index]);
 491                                 float d2 = contour(noise_cave2->result[index]);
 492                                 if (d1*d2 > 0.125)
 493                                         vm->m_data[i] = MapNode(CONTENT_AIR);
 494                         }
 495                         index2d -= ystride;
 496                 }
 497                 index2d += ystride;
 498         }
 499
 500         if (node_max.Y > LARGE_CAVE_DEPTH)
 501                 return;
 502
 503         PseudoRandom ps(blockseed + 21343);
 504         u32 bruises_count = (ps.range(1, 5) == 1) ? ps.range(1, 2) : 0;
 505         for (u32 i = 0; i < bruises_count; i++) {
 506                 CaveV5 cave(this, &ps);
 507                 cave.makeCave(node_min, node_max, max_stone_y);
 508         }
 509 }
 510
 511
 512 void MapgenV5::dustTopNodes()
 513 {
 514         if (node_max.Y < water_level)
 515                 return;
 516
 517         v3s16 em = vm->m_area.getExtent();
 518         u32 index = 0;
 519
 520         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 521         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 522                 Biome *biome = (Biome *)bmgr->get(biomemap[index]);
 523
 524                 if (biome->c_dust == CONTENT_IGNORE)
 525                         continue;
 526
 527                 u32 vi = vm->m_area.index(x, full_node_max.Y, z);
 528                 content_t c_full_max = vm->m_data[vi].getContent();
 529                 s16 y_start;
 530
 531                 if (c_full_max == CONTENT_AIR) {
 532                         y_start = full_node_max.Y - 1;
 533                 } else if (c_full_max == CONTENT_IGNORE) {
 534                         vi = vm->m_area.index(x, node_max.Y + 1, z);
 535                         content_t c_max = vm->m_data[vi].getContent();
 536
 537                         if (c_max == CONTENT_AIR)
 538                                 y_start = node_max.Y;
 539                         else
 540                                 continue;
 541                 } else {
 542                         continue;
 543                 }
 544
 545                 vi = vm->m_area.index(x, y_start, z);
 546                 for (s16 y = y_start; y >= node_min.Y - 1; y--) {
 547                         if (vm->m_data[vi].getContent() != CONTENT_AIR)
 548                                 break;
 549
 550                         vm->m_area.add_y(em, vi, -1);
 551                 }
 552
 553                 content_t c = vm->m_data[vi].getContent();
 554                 if (!ndef->get(c).buildable_to && c != CONTENT_IGNORE && c != biome->c_dust) {
 555                         vm->m_area.add_y(em, vi, 1);
 556                         vm->m_data[vi] = MapNode(biome->c_dust);
 557                 }
 558         }
 559 }
 560