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         {"blobs", MGV5_BLOBS},
  46         {NULL,         0}
  47 };
  48
  49
  50 MapgenV5::MapgenV5(int mapgenid, MapgenParams *params, EmergeManager *emerge_) {
  51         this->generating  = false;
  52         this->id     = mapgenid;
  53         this->emerge = emerge_;
  54         this->bmgr   = emerge->biomemgr;
  55
  56         this->seed        = (int)params->seed;
  57         this->water_level = params->water_level;
  58         this->flags       = params->flags;
  59         this->gennotify   = emerge->gennotify;
  60
  61         this->csize   = v3s16(1, 1, 1) * params->chunksize * MAP_BLOCKSIZE;
  62
  63         // amount of elements to skip for the next index
  64         // for noise/height/biome maps (not vmanip)
  65         this->ystride = csize.X;
  66         this->zstride = csize.X * csize.Y;
  67
  68         this->biomemap  = new u8[csize.X * csize.Z];
  69         this->heightmap = new s16[csize.X * csize.Z];
  70
  71         MapgenV5Params *sp = (MapgenV5Params *)params->sparams;
  72
  73         this->spflags     = sp->spflags;
  74
  75         // Terrain noise
  76         noise_filler_depth = new Noise(&sp->np_filler_depth, seed, csize.X, csize.Z);
  77         noise_factor       = new Noise(&sp->np_factor,       seed, csize.X, csize.Z);
  78         noise_height       = new Noise(&sp->np_height,       seed, csize.X, csize.Z);
  79
  80         // 3D terrain noise
  81         noise_cave1        = new Noise(&sp->np_cave1,   seed, csize.X, csize.Y, csize.Z);
  82         noise_cave2        = new Noise(&sp->np_cave2,   seed, csize.X, csize.Y, csize.Z);
  83         noise_ground       = new Noise(&sp->np_ground,  seed, csize.X, csize.Y, csize.Z);
  84         noise_crumble      = new Noise(&sp->np_crumble, seed, csize.X, csize.Y, csize.Z);
  85         noise_wetness      = new Noise(&sp->np_wetness, seed, csize.X, csize.Y, csize.Z);
  86
  87         // Biome noise
  88         noise_heat         = new Noise(bmgr->np_heat,     seed, csize.X, csize.Z);
  89         noise_humidity     = new Noise(bmgr->np_humidity, seed, csize.X, csize.Z);
  90
  91         //// Resolve nodes to be used
  92         INodeDefManager *ndef = emerge->ndef;
  93
  94         c_stone           = ndef->getId("mapgen_stone");
  95         c_dirt            = ndef->getId("mapgen_dirt");
  96         c_dirt_with_grass = ndef->getId("mapgen_dirt_with_grass");
  97         c_sand            = ndef->getId("mapgen_sand");
  98         c_water_source    = ndef->getId("mapgen_water_source");
  99         c_lava_source     = ndef->getId("mapgen_lava_source");
 100         c_gravel          = ndef->getId("mapgen_gravel");
 101         c_cobble          = ndef->getId("mapgen_cobble");
 102         c_ice             = ndef->getId("default:ice");
 103         c_mossycobble     = ndef->getId("mapgen_mossycobble");
 104         c_sandbrick       = ndef->getId("mapgen_sandstonebrick");
 105         c_stair_cobble    = ndef->getId("mapgen_stair_cobble");
 106         c_stair_sandstone = ndef->getId("mapgen_stair_sandstone");
 107         if (c_ice == CONTENT_IGNORE)
 108                 c_ice = CONTENT_AIR;
 109         if (c_mossycobble == CONTENT_IGNORE)
 110                 c_mossycobble = c_cobble;
 111         if (c_sandbrick == CONTENT_IGNORE)
 112                 c_sandbrick = c_desert_stone;
 113         if (c_stair_cobble == CONTENT_IGNORE)
 114                 c_stair_cobble = c_cobble;
 115         if (c_stair_sandstone == CONTENT_IGNORE)
 116                 c_stair_sandstone = c_sandbrick;
 117 }
 118
 119
 120 MapgenV5::~MapgenV5() {
 121         delete noise_filler_depth;
 122         delete noise_factor;
 123         delete noise_height;
 124         delete noise_cave1;
 125         delete noise_cave2;
 126         delete noise_ground;
 127         delete noise_crumble;
 128         delete noise_wetness;
 129
 130         delete noise_heat;
 131         delete noise_humidity;
 132
 133         delete[] heightmap;
 134         delete[] biomemap;
 135 }
 136
 137
 138 MapgenV5Params::MapgenV5Params() {
 139         spflags = MGV5_BLOBS;
 140
 141         np_filler_depth = NoiseParams(0, 1,  v3f(150, 150, 150), 261,    4, 0.7);
 142         np_factor       = NoiseParams(0, 1,  v3f(250, 250, 250), 920381, 3, 0.45);
 143         np_height       = NoiseParams(0, 10, v3f(250, 250, 250), 84174,  4, 0.5);
 144         np_cave1        = NoiseParams(0, 6,  v3f(50,  50,  50),  52534,  4, 0.5);
 145         np_cave2        = NoiseParams(0, 6,  v3f(50,  50,  50),  10325,  4, 0.5);
 146         np_ground       = NoiseParams(0, 40, v3f(80,  80,  80),  983240, 4, 0.55);
 147         np_crumble      = NoiseParams(0, 1,  v3f(20,  20,  20),  34413,  3, 1.3);
 148         np_wetness      = NoiseParams(0, 1,  v3f(40,  40,  40),  32474,  4, 1.1);
 149 }
 150
 151
 152 // Current caves noise scale default is 6 to compensate for new eased 3d noise amplitude
 153
 154 // Scaling the output of the noise function affects the overdrive of the
 155 // contour function, which affects the shape of the output considerably.
 156
 157 //#define CAVE_NOISE_SCALE 12.0 < original default
 158 //#define CAVE_NOISE_SCALE 10.0
 159 //#define CAVE_NOISE_SCALE 7.5
 160 //#define CAVE_NOISE_SCALE 5.0
 161 //#define CAVE_NOISE_SCALE 1.0
 162
 163 //#define CAVE_NOISE_THRESHOLD (2.5/CAVE_NOISE_SCALE)
 164 //#define CAVE_NOISE_THRESHOLD (1.5/CAVE_NOISE_SCALE) < original and current code
 165
 166
 167 void MapgenV5Params::readParams(Settings *settings) {
 168         settings->getFlagStrNoEx("mgv5_spflags", spflags, flagdesc_mapgen_v5);
 169
 170         settings->getNoiseParams("mgv5_np_filler_depth", np_filler_depth);
 171         settings->getNoiseParams("mgv5_np_factor",       np_factor);
 172         settings->getNoiseParams("mgv5_np_height",       np_height);
 173         settings->getNoiseParams("mgv5_np_cave1",        np_cave1);
 174         settings->getNoiseParams("mgv5_np_cave2",        np_cave2);
 175         settings->getNoiseParams("mgv5_np_ground",       np_ground);
 176         settings->getNoiseParams("mgv5_np_crumble",      np_crumble);
 177         settings->getNoiseParams("mgv5_np_wetness",      np_wetness);
 178 }
 179
 180
 181 void MapgenV5Params::writeParams(Settings *settings) {
 182         settings->setFlagStr("mgv5_spflags", spflags, flagdesc_mapgen_v5, (u32)-1);
 183
 184         settings->setNoiseParams("mgv5_np_filler_depth", np_filler_depth);
 185         settings->setNoiseParams("mgv5_np_factor",       np_factor);
 186         settings->setNoiseParams("mgv5_np_height",       np_height);
 187         settings->setNoiseParams("mgv5_np_cave1",        np_cave1);
 188         settings->setNoiseParams("mgv5_np_cave2",        np_cave2);
 189         settings->setNoiseParams("mgv5_np_ground",       np_ground);
 190         settings->setNoiseParams("mgv5_np_crumble",      np_crumble);
 191         settings->setNoiseParams("mgv5_np_wetness",      np_wetness);
 192 }
 193
 194
 195 int MapgenV5::getGroundLevelAtPoint(v2s16 p) {
 196         //TimeTaker t("getGroundLevelAtPoint", NULL, PRECISION_MICRO);
 197
 198         float f = 0.55 + NoisePerlin2D(noise_factor->np, p.X, p.Y, seed);
 199         if(f < 0.01)
 200                 f = 0.01;
 201         else if(f >= 1.0)
 202                 f *= 1.6;
 203         float h = water_level + NoisePerlin2D(noise_height->np, p.X, p.Y, seed);
 204
 205         s16 search_top = water_level + 15;
 206         s16 search_base = water_level;
 207         // Use these 2 lines instead for a slower search returning highest ground level
 208         //s16 search_top = h + f * noise_ground->np->octaves * noise_ground->np->scale;
 209         //s16 search_base = h - f * noise_ground->np->octaves * noise_ground->np->scale;
 210
 211         s16 level = -31000;
 212         for (s16 y = search_top; y >= search_base; y--) {
 213                 float n_ground = NoisePerlin3DEased(noise_ground->np, p.X, y, p.Y, seed);
 214                 if(n_ground * f > y - h) {
 215                         if(y >= search_top - 7)
 216                                 break;
 217                         else
 218                                 level = y;
 219                                 break;
 220                 }
 221         }
 222
 223         //printf("getGroundLevelAtPoint: %dus\n", t.stop());
 224         return level;
 225 }
 226
 227
 228 void MapgenV5::makeChunk(BlockMakeData *data) {
 229         assert(data->vmanip);
 230         assert(data->nodedef);
 231         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 232                 data->blockpos_requested.Y >= data->blockpos_min.Y &&
 233                 data->blockpos_requested.Z >= data->blockpos_min.Z);
 234         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 235                 data->blockpos_requested.Y <= data->blockpos_max.Y &&
 236                 data->blockpos_requested.Z <= data->blockpos_max.Z);
 237
 238         generating = true;
 239         vm   = data->vmanip;
 240         ndef = data->nodedef;
 241         //TimeTaker t("makeChunk");
 242
 243         v3s16 blockpos_min = data->blockpos_min;
 244         v3s16 blockpos_max = data->blockpos_max;
 245         node_min = blockpos_min * MAP_BLOCKSIZE;
 246         node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 247         full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
 248         full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 249
 250         // Create a block-specific seed
 251         blockseed = emerge->getBlockSeed(full_node_min);  //////use getBlockSeed2()!
 252
 253         // Make some noise
 254         calculateNoise();
 255
 256         // Generate base terrain
 257         generateBaseTerrain();
 258         updateHeightmap(node_min, node_max);
 259
 260         // Generate underground dirt, sand, gravel and lava blobs
 261         if (spflags & MGV5_BLOBS) {
 262                 generateBlobs();
 263         }
 264
 265         // Calculate biomes
 266         bmgr->calcBiomes(csize.X, csize.Z, noise_heat->result,
 267                 noise_humidity->result, heightmap, biomemap);
 268
 269         // Actually place the biome-specific nodes
 270         generateBiomes();
 271
 272         // Generate dungeons and desert temples
 273         if (flags & MG_DUNGEONS) {
 274                 DungeonGen dgen(this, NULL);
 275                 dgen.generate(blockseed, full_node_min, full_node_max);
 276         }
 277
 278         // Generate the registered decorations
 279         emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
 280
 281         // Generate the registered ores
 282         emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
 283
 284         // Sprinkle some dust on top after everything else was generated
 285         dustTopNodes();
 286
 287         //printf("makeChunk: %dms\n", t.stop());
 288
 289         // Add top and bottom side of water to transforming_liquid queue
 290         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 291
 292         // Calculate lighting
 293         if (flags & MG_LIGHT)
 294                 calcLighting(node_min - v3s16(1, 0, 1) * MAP_BLOCKSIZE,
 295                                          node_max + v3s16(1, 0, 1) * MAP_BLOCKSIZE);
 296
 297         this->generating = false;
 298 }
 299
 300
 301 void MapgenV5::calculateNoise() {
 302         //TimeTaker t("calculateNoise", NULL, PRECISION_MICRO);
 303         int x = node_min.X;
 304         int y = node_min.Y;
 305         int z = node_min.Z;
 306
 307         noise_filler_depth->perlinMap2D(x, z);
 308         noise_factor->perlinMap2D(x, z);
 309         noise_height->perlinMap2D(x, z);
 310         noise_height->transformNoiseMap();
 311
 312         noise_cave1->perlinMap3D(x, y, z, true);
 313         noise_cave1->transformNoiseMap();
 314         noise_cave2->perlinMap3D(x, y, z, true);
 315         noise_cave2->transformNoiseMap();
 316         noise_ground->perlinMap3D(x, y, z, true);
 317         noise_ground->transformNoiseMap();
 318
 319         if (spflags & MGV5_BLOBS) {
 320                 noise_crumble->perlinMap3D(x, y, z, true);
 321                 noise_wetness->perlinMap3D(x, y, z, false);
 322         }
 323
 324         noise_heat->perlinMap2D(x, z);
 325         noise_humidity->perlinMap2D(x, z);
 326
 327         //printf("calculateNoise: %dus\n", t.stop());
 328 }
 329
 330
 331 //bool is_cave(u32 index) {
 332 //      double d1 = contour(noise_cave1->result[index]);
 333 //      double d2 = contour(noise_cave2->result[index]);
 334 //      return d1*d2 > CAVE_NOISE_THRESHOLD;
 335 //}
 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 // Make base ground level
 350 void MapgenV5::generateBaseTerrain() {
 351         u32 index = 0;
 352         u32 index2d = 0;
 353
 354         for(s16 z=node_min.Z; z<=node_max.Z; z++) {
 355                 for(s16 y=node_min.Y; y<=node_max.Y; y++) {
 356                         u32 i = vm->m_area.index(node_min.X, y, z);
 357                         for(s16 x=node_min.X; x<=node_max.X; x++, i++, index++, index2d++) {
 358                                 if(vm->m_data[i].getContent() != CONTENT_IGNORE)
 359                                         continue;
 360
 361                                 float f = 0.55 + noise_factor->result[index2d];
 362                                 if(f < 0.01)
 363                                         f = 0.01;
 364                                 else if(f >= 1.0)
 365                                         f *= 1.6;
 366                                 float h = water_level + noise_height->result[index2d];
 367                                 float d1 = contour(noise_cave1->result[index]);
 368                                 float d2 = contour(noise_cave2->result[index]);
 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 if(d1*d2 > 0.2) {
 375                                         vm->m_data[i] = MapNode(CONTENT_AIR);
 376                                 } else {
 377                                         vm->m_data[i] = MapNode(c_stone);
 378                                 }
 379                         }
 380                         index2d = index2d - ystride;
 381                 }
 382                 index2d = index2d + ystride;
 383         }
 384 }
 385
 386
 387 // Add mud and sand and others underground (in place of stone)
 388 void MapgenV5::generateBlobs() {
 389         u32 index = 0;
 390
 391         for(s16 z=node_min.Z; z<=node_max.Z; z++) {
 392                 for(s16 y=node_min.Y; y<=node_max.Y; y++) {
 393                         u32 i = vm->m_area.index(node_min.X, y, z);
 394                         for(s16 x=node_min.X; x<=node_max.X; x++, i++, index++) {
 395                                 content_t c = vm->m_data[i].getContent();
 396                                 if(c != c_stone)
 397                                         continue;
 398
 399                                 if(noise_crumble->result[index] > 1.3) {
 400                                         if(noise_wetness->result[index] > 0.0)
 401                                                 vm->m_data[i] = MapNode(c_dirt);
 402                                         else
 403                                                 vm->m_data[i] = MapNode(c_sand);
 404                                 } else if(noise_crumble->result[index] > 0.7) {
 405                                         if(noise_wetness->result[index] < -0.6)
 406                                                 vm->m_data[i] = MapNode(c_gravel);
 407                                 } else if(noise_crumble->result[index] < -3.5 +
 408                                                 MYMIN(0.1 *
 409                                                 sqrt((float)MYMAX(0, -y)), 1.5)) {
 410                                         vm->m_data[i] = MapNode(c_lava_source);
 411                                 }
 412                         }
 413                 }
 414         }
 415 }
 416
 417
 418 void MapgenV5::generateBiomes() {
 419         if (node_max.Y < water_level)
 420                 return;
 421
 422         MapNode n_air(CONTENT_AIR);
 423         MapNode n_stone(c_stone);
 424         MapNode n_water(c_water_source);
 425
 426         v3s16 em = vm->m_area.getExtent();
 427         u32 index = 0;
 428
 429         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 430         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 431                 Biome *biome  = (Biome *)bmgr->get(biomemap[index]);
 432                 s16 dfiller   = biome->depth_filler + noise_filler_depth->result[index];
 433                 s16 y0_top    = biome->depth_top;
 434                 s16 y0_filler = biome->depth_filler + biome->depth_top + dfiller;
 435
 436                 s16 nplaced = 0;
 437                 u32 i = vm->m_area.index(x, node_max.Y, z);
 438
 439                 content_t c_above = vm->m_data[i + em.X].getContent();
 440                 bool have_air = c_above == CONTENT_AIR;
 441
 442                 for (s16 y = node_max.Y; y >= node_min.Y; y--) {
 443                         content_t c = vm->m_data[i].getContent();
 444                         bool is_replaceable_content =
 445                                 c == c_stone || c == c_dirt_with_grass || c == c_dirt ||
 446                                 c == c_sand  || c == c_lava_source     || c == c_gravel;
 447
 448                         if (is_replaceable_content && have_air) {
 449                                 content_t c_below = vm->m_data[i - em.X].getContent();
 450
 451                                 if (c_below != CONTENT_AIR) {
 452                                         if (nplaced < y0_top) {
 453                                                 // A hack to prevent dirt_with_grass from being
 454                                                 // placed below water.  TODO: fix later
 455                                                 content_t c_place = ((y < water_level) &&
 456                                                                 (biome->c_top ==
 457                                                                 c_dirt_with_grass)) ?
 458                                                                  c_dirt : biome->c_top;
 459
 460                                                 vm->m_data[i] = MapNode(c_place);
 461                                                 nplaced++;
 462                                         } else if (nplaced < y0_filler && nplaced >= y0_top) {
 463                                                 vm->m_data[i] = MapNode(biome->c_filler);
 464                                                 nplaced++;
 465                                         } else {
 466                                                 have_air = false;
 467                                                 nplaced  = 0;
 468                                         }
 469                                 }
 470                         } else if (c == c_water_source) {
 471                                 have_air = true;
 472                                 nplaced = 0;
 473                                 vm->m_data[i] = MapNode(biome->c_water);
 474                         } else if (c == CONTENT_AIR) {
 475                                 have_air = true;
 476                                 nplaced = 0;
 477                         }
 478
 479                         vm->m_area.add_y(em, i, -1);
 480                 }
 481         }
 482 }
 483
 484 void MapgenV5::dustTopNodes() {
 485         v3s16 em = vm->m_area.getExtent();
 486         u32 index = 0;
 487
 488         if (water_level > node_max.Y)
 489                 return;
 490
 491         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 492         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 493                 Biome *biome = (Biome *)bmgr->get(biomemap[index]);
 494
 495                 if (biome->c_dust == CONTENT_IGNORE)
 496                         continue;
 497
 498                 s16 y = node_max.Y;
 499                 u32 vi = vm->m_area.index(x, y, z);
 500                 for (; y >= node_min.Y; y--) {
 501                         if (vm->m_data[vi].getContent() != CONTENT_AIR)
 502                                 break;
 503
 504                         vm->m_area.add_y(em, vi, -1);
 505                 }
 506
 507                 content_t c = vm->m_data[vi].getContent();
 508                 if (c == biome->c_water && biome->c_dust_water != CONTENT_IGNORE) {
 509                         if (y < node_min.Y)
 510                                 continue;
 511
 512                         vm->m_data[vi] = MapNode(biome->c_dust_water);
 513                 } else if (!ndef->get(c).buildable_to && c != CONTENT_IGNORE) {
 514                         if (y == node_max.Y)
 515                                 continue;
 516
 517                         vm->m_area.add_y(em, vi, 1);
 518                         vm->m_data[vi] = MapNode(biome->c_dust);
 519                 }
 520         }
 521 }
 522