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