src/mapgen_v6.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2015 celeron55, Perttu Ahola <celeron55@gmail.com>
   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 "serverobject.h"
  28 #include "content_sao.h"
  29 #include "nodedef.h"
  30 #include "voxelalgorithms.h"
  31 //#include "profiler.h" // For TimeTaker
  32 #include "settings.h" // For g_settings
  33 #include "emerge.h"
  34 #include "dungeongen.h"
  35 #include "cavegen.h"
  36 #include "treegen.h"
  37 #include "mg_ore.h"
  38 #include "mg_decoration.h"
  39 #include "mapgen_v6.h"
  40
  41
  42 FlagDesc flagdesc_mapgen_v6[] = {
  43         {"jungles",    MGV6_JUNGLES},
  44         {"biomeblend", MGV6_BIOMEBLEND},
  45         {"mudflow",    MGV6_MUDFLOW},
  46         {"snowbiomes", MGV6_SNOWBIOMES},
  47         {"flat",       MGV6_FLAT},
  48         {"trees",      MGV6_TREES},
  49         {NULL,         0}
  50 };
  51
  52
  53 /////////////////////////////////////////////////////////////////////////////
  54
  55
  56 MapgenV6::MapgenV6(int mapgenid, MapgenV6Params *params, EmergeManager *emerge)
  57         : Mapgen(mapgenid, params, emerge)
  58 {
  59         this->m_emerge = emerge;
  60         this->ystride = csize.X; //////fix this
  61
  62         this->heightmap = new s16[csize.X * csize.Z];
  63
  64         this->spflags     = params->spflags;
  65         this->freq_desert = params->freq_desert;
  66         this->freq_beach  = params->freq_beach;
  67
  68         np_cave        = &params->np_cave;
  69         np_humidity    = &params->np_humidity;
  70         np_trees       = &params->np_trees;
  71         np_apple_trees = &params->np_apple_trees;
  72
  73         //// Create noise objects
  74         noise_terrain_base   = new Noise(&params->np_terrain_base,   seed, csize.X, csize.Y);
  75         noise_terrain_higher = new Noise(&params->np_terrain_higher, seed, csize.X, csize.Y);
  76         noise_steepness      = new Noise(&params->np_steepness,      seed, csize.X, csize.Y);
  77         noise_height_select  = new Noise(&params->np_height_select,  seed, csize.X, csize.Y);
  78         noise_mud            = new Noise(&params->np_mud,            seed, csize.X, csize.Y);
  79         noise_beach          = new Noise(&params->np_beach,          seed, csize.X, csize.Y);
  80         noise_biome          = new Noise(&params->np_biome,          seed,
  81                         csize.X + 2 * MAP_BLOCKSIZE, csize.Y + 2 * MAP_BLOCKSIZE);
  82         noise_humidity       = new Noise(&params->np_humidity,       seed,
  83                         csize.X + 2 * MAP_BLOCKSIZE, csize.Y + 2 * MAP_BLOCKSIZE);
  84
  85         //// Resolve nodes to be used
  86         INodeDefManager *ndef = emerge->ndef;
  87
  88         c_stone           = ndef->getId("mapgen_stone");
  89         c_dirt            = ndef->getId("mapgen_dirt");
  90         c_dirt_with_grass = ndef->getId("mapgen_dirt_with_grass");
  91         c_sand            = ndef->getId("mapgen_sand");
  92         c_water_source    = ndef->getId("mapgen_water_source");
  93         c_lava_source     = ndef->getId("mapgen_lava_source");
  94         c_gravel          = ndef->getId("mapgen_gravel");
  95         c_desert_stone    = ndef->getId("mapgen_desert_stone");
  96         c_desert_sand     = ndef->getId("mapgen_desert_sand");
  97         c_dirt_with_snow  = ndef->getId("mapgen_dirt_with_snow");
  98         c_snow            = ndef->getId("mapgen_snow");
  99         c_snowblock       = ndef->getId("mapgen_snowblock");
 100         c_ice             = ndef->getId("mapgen_ice");
 101
 102         c_cobble          = ndef->getId("mapgen_cobble");
 103         c_stair_cobble    = ndef->getId("mapgen_stair_cobble");
 104         c_mossycobble     = ndef->getId("mapgen_mossycobble");
 105
 106         if (c_desert_sand == CONTENT_IGNORE)
 107                 c_desert_sand = c_sand;
 108         if (c_desert_stone == CONTENT_IGNORE)
 109                 c_desert_stone = c_stone;
 110         if (c_mossycobble == CONTENT_IGNORE)
 111                 c_mossycobble = c_cobble;
 112         if (c_stair_cobble == CONTENT_IGNORE)
 113                 c_stair_cobble = c_cobble;
 114         if (c_dirt_with_snow == CONTENT_IGNORE)
 115                 c_dirt_with_snow = c_dirt_with_grass;
 116         if (c_snow == CONTENT_IGNORE)
 117                 c_snow = CONTENT_AIR;
 118         if (c_snowblock == CONTENT_IGNORE)
 119                 c_snowblock = c_dirt_with_grass;
 120         if (c_ice == CONTENT_IGNORE)
 121                 c_ice = c_water_source;
 122 }
 123
 124
 125 MapgenV6::~MapgenV6()
 126 {
 127         delete noise_terrain_base;
 128         delete noise_terrain_higher;
 129         delete noise_steepness;
 130         delete noise_height_select;
 131         delete noise_mud;
 132         delete noise_beach;
 133         delete noise_biome;
 134         delete noise_humidity;
 135
 136         delete[] heightmap;
 137 }
 138
 139
 140 MapgenV6Params::MapgenV6Params()
 141 {
 142         spflags = MGV6_JUNGLES | MGV6_SNOWBIOMES | MGV6_TREES |
 143                 MGV6_BIOMEBLEND | MGV6_MUDFLOW;
 144
 145         freq_desert = 0.45;
 146         freq_beach  = 0.15;
 147
 148         np_terrain_base   = NoiseParams(-4,   20.0, v3f(250.0, 250.0, 250.0), 82341,  5, 0.6,  2.0);
 149         np_terrain_higher = NoiseParams(20,   16.0, v3f(500.0, 500.0, 500.0), 85039,  5, 0.6,  2.0);
 150         np_steepness      = NoiseParams(0.85, 0.5,  v3f(125.0, 125.0, 125.0), -932,   5, 0.7,  2.0);
 151         np_height_select  = NoiseParams(0,    1.0,  v3f(250.0, 250.0, 250.0), 4213,   5, 0.69, 2.0);
 152         np_mud            = NoiseParams(4,    2.0,  v3f(200.0, 200.0, 200.0), 91013,  3, 0.55, 2.0);
 153         np_beach          = NoiseParams(0,    1.0,  v3f(250.0, 250.0, 250.0), 59420,  3, 0.50, 2.0);
 154         np_biome          = NoiseParams(0,    1.0,  v3f(500.0, 500.0, 500.0), 9130,   3, 0.50, 2.0);
 155         np_cave           = NoiseParams(6,    6.0,  v3f(250.0, 250.0, 250.0), 34329,  3, 0.50, 2.0);
 156         np_humidity       = NoiseParams(0.5,  0.5,  v3f(500.0, 500.0, 500.0), 72384,  3, 0.50, 2.0);
 157         np_trees          = NoiseParams(0,    1.0,  v3f(125.0, 125.0, 125.0), 2,      4, 0.66, 2.0);
 158         np_apple_trees    = NoiseParams(0,    1.0,  v3f(100.0, 100.0, 100.0), 342902, 3, 0.45, 2.0);
 159 }
 160
 161
 162 void MapgenV6Params::readParams(const Settings *settings)
 163 {
 164         settings->getFlagStrNoEx("mgv6_spflags", spflags, flagdesc_mapgen_v6);
 165         settings->getFloatNoEx("mgv6_freq_desert", freq_desert);
 166         settings->getFloatNoEx("mgv6_freq_beach",  freq_beach);
 167
 168         settings->getNoiseParams("mgv6_np_terrain_base",   np_terrain_base);
 169         settings->getNoiseParams("mgv6_np_terrain_higher", np_terrain_higher);
 170         settings->getNoiseParams("mgv6_np_steepness",      np_steepness);
 171         settings->getNoiseParams("mgv6_np_height_select",  np_height_select);
 172         settings->getNoiseParams("mgv6_np_mud",            np_mud);
 173         settings->getNoiseParams("mgv6_np_beach",          np_beach);
 174         settings->getNoiseParams("mgv6_np_biome",          np_biome);
 175         settings->getNoiseParams("mgv6_np_cave",           np_cave);
 176         settings->getNoiseParams("mgv6_np_humidity",       np_humidity);
 177         settings->getNoiseParams("mgv6_np_trees",          np_trees);
 178         settings->getNoiseParams("mgv6_np_apple_trees",    np_apple_trees);
 179 }
 180
 181
 182 void MapgenV6Params::writeParams(Settings *settings) const
 183 {
 184         settings->setFlagStr("mgv6_spflags", spflags, flagdesc_mapgen_v6, U32_MAX);
 185         settings->setFloat("mgv6_freq_desert", freq_desert);
 186         settings->setFloat("mgv6_freq_beach",  freq_beach);
 187
 188         settings->setNoiseParams("mgv6_np_terrain_base",   np_terrain_base);
 189         settings->setNoiseParams("mgv6_np_terrain_higher", np_terrain_higher);
 190         settings->setNoiseParams("mgv6_np_steepness",      np_steepness);
 191         settings->setNoiseParams("mgv6_np_height_select",  np_height_select);
 192         settings->setNoiseParams("mgv6_np_mud",            np_mud);
 193         settings->setNoiseParams("mgv6_np_beach",          np_beach);
 194         settings->setNoiseParams("mgv6_np_biome",          np_biome);
 195         settings->setNoiseParams("mgv6_np_cave",           np_cave);
 196         settings->setNoiseParams("mgv6_np_humidity",       np_humidity);
 197         settings->setNoiseParams("mgv6_np_trees",          np_trees);
 198         settings->setNoiseParams("mgv6_np_apple_trees",    np_apple_trees);
 199 }
 200
 201
 202 //////////////////////// Some helper functions for the map generator
 203
 204 // Returns Y one under area minimum if not found
 205 s16 MapgenV6::find_stone_level(v2s16 p2d)
 206 {
 207         v3s16 em = vm->m_area.getExtent();
 208         s16 y_nodes_max = vm->m_area.MaxEdge.Y;
 209         s16 y_nodes_min = vm->m_area.MinEdge.Y;
 210         u32 i = vm->m_area.index(p2d.X, y_nodes_max, p2d.Y);
 211         s16 y;
 212
 213         for (y = y_nodes_max; y >= y_nodes_min; y--) {
 214                 content_t c = vm->m_data[i].getContent();
 215                 if (c != CONTENT_IGNORE && (c == c_stone || c == c_desert_stone))
 216                         break;
 217
 218                 vm->m_area.add_y(em, i, -1);
 219         }
 220         return (y >= y_nodes_min) ? y : y_nodes_min - 1;
 221 }
 222
 223
 224 // Required by mapgen.h
 225 bool MapgenV6::block_is_underground(u64 seed, v3s16 blockpos)
 226 {
 227         /*s16 minimum_groundlevel = (s16)get_sector_minimum_ground_level(
 228                         seed, v2s16(blockpos.X, blockpos.Z));*/
 229         // Nah, this is just a heuristic, just return something
 230         s16 minimum_groundlevel = water_level;
 231
 232         if(blockpos.Y * MAP_BLOCKSIZE + MAP_BLOCKSIZE <= minimum_groundlevel)
 233                 return true;
 234         else
 235                 return false;
 236 }
 237
 238
 239 //////////////////////// Base terrain height functions
 240
 241 float MapgenV6::baseTerrainLevel(float terrain_base, float terrain_higher,
 242         float steepness, float height_select)
 243 {
 244         float base   = 1 + terrain_base;
 245         float higher = 1 + terrain_higher;
 246
 247         // Limit higher ground level to at least base
 248         if(higher < base)
 249                 higher = base;
 250
 251         // Steepness factor of cliffs
 252         float b = steepness;
 253         b = rangelim(b, 0.0, 1000.0);
 254         b = 5 * b * b * b * b * b * b * b;
 255         b = rangelim(b, 0.5, 1000.0);
 256
 257         // Values 1.5...100 give quite horrible looking slopes
 258         if (b > 1.5 && b < 100.0)
 259                 b = (b < 10.0) ? 1.5 : 100.0;
 260
 261         float a_off = -0.20; // Offset to more low
 262         float a = 0.5 + b * (a_off + height_select);
 263         a = rangelim(a, 0.0, 1.0); // Limit
 264
 265         return base * (1.0 - a) + higher * a;
 266 }
 267
 268
 269 float MapgenV6::baseTerrainLevelFromNoise(v2s16 p)
 270 {
 271         if (spflags & MGV6_FLAT)
 272                 return water_level;
 273
 274         float terrain_base   = NoisePerlin2D_PO(&noise_terrain_base->np,
 275                                                         p.X, 0.5, p.Y, 0.5, seed);
 276         float terrain_higher = NoisePerlin2D_PO(&noise_terrain_higher->np,
 277                                                         p.X, 0.5, p.Y, 0.5, seed);
 278         float steepness      = NoisePerlin2D_PO(&noise_steepness->np,
 279                                                         p.X, 0.5, p.Y, 0.5, seed);
 280         float height_select  = NoisePerlin2D_PO(&noise_height_select->np,
 281                                                         p.X, 0.5, p.Y, 0.5, seed);
 282
 283         return baseTerrainLevel(terrain_base, terrain_higher,
 284                                                         steepness, height_select);
 285 }
 286
 287
 288 float MapgenV6::baseTerrainLevelFromMap(v2s16 p)
 289 {
 290         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 291         return baseTerrainLevelFromMap(index);
 292 }
 293
 294
 295 float MapgenV6::baseTerrainLevelFromMap(int index)
 296 {
 297         if (spflags & MGV6_FLAT)
 298                 return water_level;
 299
 300         float terrain_base   = noise_terrain_base->result[index];
 301         float terrain_higher = noise_terrain_higher->result[index];
 302         float steepness      = noise_steepness->result[index];
 303         float height_select  = noise_height_select->result[index];
 304
 305         return baseTerrainLevel(terrain_base, terrain_higher,
 306                                                         steepness, height_select);
 307 }
 308
 309
 310 s16 MapgenV6::find_ground_level_from_noise(u64 seed, v2s16 p2d, s16 precision)
 311 {
 312         return baseTerrainLevelFromNoise(p2d) + MGV6_AVERAGE_MUD_AMOUNT;
 313 }
 314
 315
 316 int MapgenV6::getGroundLevelAtPoint(v2s16 p)
 317 {
 318         return baseTerrainLevelFromNoise(p) + MGV6_AVERAGE_MUD_AMOUNT;
 319 }
 320
 321
 322 int MapgenV6::getSpawnLevelAtPoint(v2s16 p)
 323 {
 324         s16 level_at_point = baseTerrainLevelFromNoise(p) + MGV6_AVERAGE_MUD_AMOUNT;
 325         if (level_at_point <= water_level ||
 326                         level_at_point > water_level + 16)
 327                 return MAX_MAP_GENERATION_LIMIT;  // Unsuitable spawn point
 328         else
 329                 return level_at_point;
 330 }
 331
 332
 333 //////////////////////// Noise functions
 334
 335 float MapgenV6::getMudAmount(v2s16 p)
 336 {
 337         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 338         return getMudAmount(index);
 339 }
 340
 341
 342 bool MapgenV6::getHaveBeach(v2s16 p)
 343 {
 344         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 345         return getHaveBeach(index);
 346 }
 347
 348
 349 BiomeV6Type MapgenV6::getBiome(v2s16 p)
 350 {
 351         int index = (p.Y - full_node_min.Z) * (ystride + 2 * MAP_BLOCKSIZE)
 352                         + (p.X - full_node_min.X);
 353         return getBiome(index, p);
 354 }
 355
 356
 357 float MapgenV6::getHumidity(v2s16 p)
 358 {
 359         /*double noise = noise2d_perlin(
 360                 0.5+(float)p.X/500, 0.5+(float)p.Y/500,
 361                 seed+72384, 4, 0.66);
 362         noise = (noise + 1.0)/2.0;*/
 363
 364         int index = (p.Y - full_node_min.Z) * (ystride + 2 * MAP_BLOCKSIZE)
 365                         + (p.X - full_node_min.X);
 366         float noise = noise_humidity->result[index];
 367
 368         if (noise < 0.0)
 369                 noise = 0.0;
 370         if (noise > 1.0)
 371                 noise = 1.0;
 372         return noise;
 373 }
 374
 375
 376 float MapgenV6::getTreeAmount(v2s16 p)
 377 {
 378         /*double noise = noise2d_perlin(
 379                         0.5+(float)p.X/125, 0.5+(float)p.Y/125,
 380                         seed+2, 4, 0.66);*/
 381
 382         float noise = NoisePerlin2D(np_trees, p.X, p.Y, seed);
 383         float zeroval = -0.39;
 384         if (noise < zeroval)
 385                 return 0;
 386         else
 387                 return 0.04 * (noise - zeroval) / (1.0 - zeroval);
 388 }
 389
 390
 391 bool MapgenV6::getHaveAppleTree(v2s16 p)
 392 {
 393         /*is_apple_tree = noise2d_perlin(
 394                 0.5+(float)p.X/100, 0.5+(float)p.Z/100,
 395                 data->seed+342902, 3, 0.45) > 0.2;*/
 396
 397         float noise = NoisePerlin2D(np_apple_trees, p.X, p.Y, seed);
 398
 399         return noise > 0.2;
 400 }
 401
 402
 403 float MapgenV6::getMudAmount(int index)
 404 {
 405         if (spflags & MGV6_FLAT)
 406                 return MGV6_AVERAGE_MUD_AMOUNT;
 407
 408         /*return ((float)AVERAGE_MUD_AMOUNT + 2.0 * noise2d_perlin(
 409                         0.5+(float)p.X/200, 0.5+(float)p.Y/200,
 410                         seed+91013, 3, 0.55));*/
 411
 412         return noise_mud->result[index];
 413 }
 414
 415
 416 bool MapgenV6::getHaveBeach(int index)
 417 {
 418         // Determine whether to have sand here
 419         /*double sandnoise = noise2d_perlin(
 420                         0.2+(float)p2d.X/250, 0.7+(float)p2d.Y/250,
 421                         seed+59420, 3, 0.50);*/
 422
 423         float sandnoise = noise_beach->result[index];
 424         return (sandnoise > freq_beach);
 425 }
 426
 427
 428 BiomeV6Type MapgenV6::getBiome(int index, v2s16 p)
 429 {
 430         // Just do something very simple as for now
 431         /*double d = noise2d_perlin(
 432                         0.6+(float)p2d.X/250, 0.2+(float)p2d.Y/250,
 433                         seed+9130, 3, 0.50);*/
 434
 435         float d = noise_biome->result[index];
 436         float h = noise_humidity->result[index];
 437
 438         if (spflags & MGV6_SNOWBIOMES) {
 439                 float blend = (spflags & MGV6_BIOMEBLEND) ? noise2d(p.X, p.Y, seed) / 40 : 0;
 440
 441                 if (d > MGV6_FREQ_HOT + blend) {
 442                         if (h > MGV6_FREQ_JUNGLE + blend)
 443                                 return BT_JUNGLE;
 444                         else
 445                                 return BT_DESERT;
 446                 } else if (d < MGV6_FREQ_SNOW + blend) {
 447                         if (h > MGV6_FREQ_TAIGA + blend)
 448                                 return BT_TAIGA;
 449                         else
 450                                 return BT_TUNDRA;
 451                 } else {
 452                         return BT_NORMAL;
 453                 }
 454         } else {
 455                 if (d > freq_desert)
 456                         return BT_DESERT;
 457
 458                 if ((spflags & MGV6_BIOMEBLEND) && (d > freq_desert - 0.10) &&
 459                                 ((noise2d(p.X, p.Y, seed) + 1.0) > (freq_desert - d) * 20.0))
 460                         return BT_DESERT;
 461
 462                 if ((spflags & MGV6_JUNGLES) && h > 0.75)
 463                         return BT_JUNGLE;
 464                 else
 465                         return BT_NORMAL;
 466         }
 467 }
 468
 469
 470 u32 MapgenV6::get_blockseed(u64 seed, v3s16 p)
 471 {
 472         s32 x = p.X, y = p.Y, z = p.Z;
 473         return (u32)(seed % 0x100000000ULL) + z * 38134234 + y * 42123 + x * 23;
 474 }
 475
 476
 477 //////////////////////// Map generator
 478
 479 void MapgenV6::makeChunk(BlockMakeData *data)
 480 {
 481         // Pre-conditions
 482         assert(data->vmanip);
 483         assert(data->nodedef);
 484         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 485                 data->blockpos_requested.Y >= data->blockpos_min.Y &&
 486                 data->blockpos_requested.Z >= data->blockpos_min.Z);
 487         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 488                 data->blockpos_requested.Y <= data->blockpos_max.Y &&
 489                 data->blockpos_requested.Z <= data->blockpos_max.Z);
 490
 491         this->generating = true;
 492         this->vm   = data->vmanip;
 493         this->ndef = data->nodedef;
 494
 495         // Hack: use minimum block coords for old code that assumes a single block
 496         v3s16 blockpos_min = data->blockpos_min;
 497         v3s16 blockpos_max = data->blockpos_max;
 498
 499         // Area of central chunk
 500         node_min = blockpos_min * MAP_BLOCKSIZE;
 501         node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 502
 503         // Full allocated area
 504         full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
 505         full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 506
 507         central_area_size = node_max - node_min + v3s16(1, 1, 1);
 508         assert(central_area_size.X == central_area_size.Z);
 509
 510         int volume_blocks = (blockpos_max.X - blockpos_min.X + 1)
 511                                           * (blockpos_max.Y - blockpos_min.Y + 1)
 512                                           * (blockpos_max.Z - blockpos_max.Z + 1);
 513
 514         volume_nodes = volume_blocks *
 515                 MAP_BLOCKSIZE * MAP_BLOCKSIZE * MAP_BLOCKSIZE;
 516
 517         // Create a block-specific seed
 518         blockseed = get_blockseed(data->seed, full_node_min);
 519
 520         // Make some noise
 521         calculateNoise();
 522
 523         // Maximum height of the stone surface and obstacles.
 524         // This is used to guide the cave generation
 525         s16 stone_surface_max_y;
 526
 527         // Generate general ground level to full area
 528         stone_surface_max_y = generateGround();
 529
 530         // Create initial heightmap to limit caves
 531         updateHeightmap(node_min, node_max);
 532
 533         const s16 max_spread_amount = MAP_BLOCKSIZE;
 534         // Limit dirt flow area by 1 because mud is flown into neighbors.
 535         s16 mudflow_minpos = -max_spread_amount + 1;
 536         s16 mudflow_maxpos = central_area_size.X + max_spread_amount - 2;
 537
 538         // Loop this part, it will make stuff look older and newer nicely
 539         const u32 age_loops = 2;
 540         for (u32 i_age = 0; i_age < age_loops; i_age++) { // Aging loop
 541                 // Make caves (this code is relatively horrible)
 542                 if (flags & MG_CAVES)
 543                         generateCaves(stone_surface_max_y);
 544
 545                 // Add mud to the central chunk
 546                 addMud();
 547
 548                 // Flow mud away from steep edges
 549                 if (spflags & MGV6_MUDFLOW)
 550                         flowMud(mudflow_minpos, mudflow_maxpos);
 551
 552         }
 553
 554         // Update heightmap after mudflow
 555         updateHeightmap(node_min, node_max);
 556
 557         // Add dungeons
 558         if ((flags & MG_DUNGEONS) && (stone_surface_max_y >= node_min.Y)) {
 559                 DungeonParams dp;
 560
 561                 dp.seed = seed;
 562                 dp.c_water       = c_water_source;
 563                 dp.c_river_water = c_water_source;
 564                 dp.rooms_min     = 2;
 565                 dp.rooms_max     = 16;
 566                 dp.y_min         = -MAX_MAP_GENERATION_LIMIT;
 567                 dp.y_max         = MAX_MAP_GENERATION_LIMIT;
 568                 dp.np_density    = NoiseParams(0.9, 0.5, v3f(500.0, 500.0, 500.0), 0, 2, 0.8, 2.0);
 569                 dp.np_alt_wall   = NoiseParams(-0.4, 1.0, v3f(40.0, 40.0, 40.0), 32474, 6, 1.1, 2.0);
 570
 571                 if (getBiome(0, v2s16(node_min.X, node_min.Z)) == BT_DESERT) {
 572                         dp.c_wall     = c_desert_stone;
 573                         dp.c_alt_wall = CONTENT_IGNORE;
 574                         dp.c_stair    = c_desert_stone;
 575
 576                         dp.diagonal_dirs = true;
 577                         dp.holesize      = v3s16(2, 3, 2);
 578                         dp.roomsize      = v3s16(2, 5, 2);
 579                         dp.notifytype    = GENNOTIFY_TEMPLE;
 580                 } else {
 581                         dp.c_wall     = c_cobble;
 582                         dp.c_alt_wall = c_mossycobble;
 583                         dp.c_stair    = c_stair_cobble;
 584
 585                         dp.diagonal_dirs = false;
 586                         dp.holesize      = v3s16(1, 2, 1);
 587                         dp.roomsize      = v3s16(0, 0, 0);
 588                         dp.notifytype    = GENNOTIFY_DUNGEON;
 589                 }
 590
 591                 DungeonGen dgen(ndef, &gennotify, &dp);
 592                 dgen.generate(vm, blockseed, full_node_min, full_node_max);
 593         }
 594
 595         // Add top and bottom side of water to transforming_liquid queue
 596         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 597
 598         // Add surface nodes
 599         growGrass();
 600
 601         // Generate some trees, and add grass, if a jungle
 602         if (spflags & MGV6_TREES)
 603                 placeTreesAndJungleGrass();
 604
 605         // Generate the registered decorations
 606         if (flags & MG_DECORATIONS)
 607                 m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
 608
 609         // Generate the registered ores
 610         m_emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
 611
 612         // Calculate lighting
 613         if (flags & MG_LIGHT)
 614                 calcLighting(node_min - v3s16(1, 1, 1) * MAP_BLOCKSIZE,
 615                         node_max + v3s16(1, 0, 1) * MAP_BLOCKSIZE,
 616                         full_node_min, full_node_max);
 617
 618         this->generating = false;
 619 }
 620
 621
 622 void MapgenV6::calculateNoise()
 623 {
 624         int x = node_min.X;
 625         int z = node_min.Z;
 626         int fx = full_node_min.X;
 627         int fz = full_node_min.Z;
 628
 629         if (!(spflags & MGV6_FLAT)) {
 630                 noise_terrain_base->perlinMap2D_PO(x, 0.5, z, 0.5);
 631                 noise_terrain_higher->perlinMap2D_PO(x, 0.5, z, 0.5);
 632                 noise_steepness->perlinMap2D_PO(x, 0.5, z, 0.5);
 633                 noise_height_select->perlinMap2D_PO(x, 0.5, z, 0.5);
 634                 noise_mud->perlinMap2D_PO(x, 0.5, z, 0.5);
 635         }
 636
 637         noise_beach->perlinMap2D_PO(x, 0.2, z, 0.7);
 638
 639         noise_biome->perlinMap2D_PO(fx, 0.6, fz, 0.2);
 640         noise_humidity->perlinMap2D_PO(fx, 0.0, fz, 0.0);
 641         // Humidity map does not need range limiting 0 to 1,
 642         // only humidity at point does
 643 }
 644
 645
 646 int MapgenV6::generateGround()
 647 {
 648         //TimeTaker timer1("Generating ground level");
 649         MapNode n_air(CONTENT_AIR), n_water_source(c_water_source);
 650         MapNode n_stone(c_stone), n_desert_stone(c_desert_stone);
 651         MapNode n_ice(c_ice);
 652         int stone_surface_max_y = -MAX_MAP_GENERATION_LIMIT;
 653
 654         u32 index = 0;
 655         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 656         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 657                 // Surface height
 658                 s16 surface_y = (s16)baseTerrainLevelFromMap(index);
 659
 660                 // Log it
 661                 if (surface_y > stone_surface_max_y)
 662                         stone_surface_max_y = surface_y;
 663
 664                 BiomeV6Type bt = getBiome(v2s16(x, z));
 665
 666                 // Fill ground with stone
 667                 v3s16 em = vm->m_area.getExtent();
 668                 u32 i = vm->m_area.index(x, node_min.Y, z);
 669                 for (s16 y = node_min.Y; y <= node_max.Y; y++) {
 670                         if (vm->m_data[i].getContent() == CONTENT_IGNORE) {
 671                                 if (y <= surface_y) {
 672                                         vm->m_data[i] = (y >= MGV6_DESERT_STONE_BASE
 673                                                         && bt == BT_DESERT) ?
 674                                                 n_desert_stone : n_stone;
 675                                 } else if (y <= water_level) {
 676                                         vm->m_data[i] = (y >= MGV6_ICE_BASE
 677                                                         && bt == BT_TUNDRA) ?
 678                                                 n_ice : n_water_source;
 679                                 } else {
 680                                         vm->m_data[i] = n_air;
 681                                 }
 682                         }
 683                         vm->m_area.add_y(em, i, 1);
 684                 }
 685         }
 686
 687         return stone_surface_max_y;
 688 }
 689
 690
 691 void MapgenV6::addMud()
 692 {
 693         // 15ms @cs=8
 694         //TimeTaker timer1("add mud");
 695         MapNode n_dirt(c_dirt), n_gravel(c_gravel);
 696         MapNode n_sand(c_sand), n_desert_sand(c_desert_sand);
 697         MapNode addnode;
 698
 699         u32 index = 0;
 700         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 701         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 702                 // Randomize mud amount
 703                 s16 mud_add_amount = getMudAmount(index) / 2.0 + 0.5;
 704
 705                 // Find ground level
 706                 s16 surface_y = find_stone_level(v2s16(x, z)); /////////////////optimize this!
 707
 708                 // Handle area not found
 709                 if (surface_y == vm->m_area.MinEdge.Y - 1)
 710                         continue;
 711
 712                 BiomeV6Type bt = getBiome(v2s16(x, z));
 713                 addnode = (bt == BT_DESERT) ? n_desert_sand : n_dirt;
 714
 715                 if (bt == BT_DESERT && surface_y + mud_add_amount <= water_level + 1) {
 716                         addnode = n_sand;
 717                 } else if (mud_add_amount <= 0) {
 718                         mud_add_amount = 1 - mud_add_amount;
 719                         addnode = n_gravel;
 720                 } else if (bt != BT_DESERT && getHaveBeach(index) &&
 721                                 surface_y + mud_add_amount <= water_level + 2) {
 722                         addnode = n_sand;
 723                 }
 724
 725                 if ((bt == BT_DESERT || bt == BT_TUNDRA) && surface_y > 20)
 726                         mud_add_amount = MYMAX(0, mud_add_amount - (surface_y - 20) / 5);
 727
 728                 /* If topmost node is grass, change it to mud.  It might be if it was
 729                 // flown to there from a neighboring chunk and then converted.
 730                 u32 i = vm->m_area.index(x, surface_y, z);
 731                 if (vm->m_data[i].getContent() == c_dirt_with_grass)
 732                         vm->m_data[i] = n_dirt;*/
 733
 734                 // Add mud on ground
 735                 s16 mudcount = 0;
 736                 v3s16 em = vm->m_area.getExtent();
 737                 s16 y_start = surface_y + 1;
 738                 u32 i = vm->m_area.index(x, y_start, z);
 739                 for (s16 y = y_start; y <= node_max.Y; y++) {
 740                         if (mudcount >= mud_add_amount)
 741                                 break;
 742
 743                         vm->m_data[i] = addnode;
 744                         mudcount++;
 745
 746                         vm->m_area.add_y(em, i, 1);
 747                 }
 748         }
 749 }
 750
 751
 752 void MapgenV6::flowMud(s16 &mudflow_minpos, s16 &mudflow_maxpos)
 753 {
 754         // 340ms @cs=8
 755         //TimeTaker timer1("flow mud");
 756
 757         // Iterate a few times
 758         for (s16 k = 0; k < 3; k++) {
 759                 for (s16 z = mudflow_minpos; z <= mudflow_maxpos; z++)
 760                 for (s16 x = mudflow_minpos; x <= mudflow_maxpos; x++) {
 761                         // Invert coordinates every 2nd iteration
 762                         if (k % 2 == 0) {
 763                                 x = mudflow_maxpos - (x - mudflow_minpos);
 764                                 z = mudflow_maxpos - (z - mudflow_minpos);
 765                         }
 766
 767                         // Node position in 2d
 768                         v2s16 p2d = v2s16(node_min.X, node_min.Z) + v2s16(x, z);
 769
 770                         v3s16 em = vm->m_area.getExtent();
 771                         u32 i = vm->m_area.index(p2d.X, node_max.Y, p2d.Y);
 772                         s16 y = node_max.Y;
 773
 774                         while (y >= node_min.Y) {
 775
 776                         for (;; y--) {
 777                                 MapNode *n = NULL;
 778                                 // Find mud
 779                                 for (; y >= node_min.Y; y--) {
 780                                         n = &vm->m_data[i];
 781                                         if (n->getContent() == c_dirt ||
 782                                                         n->getContent() == c_dirt_with_grass ||
 783                                                         n->getContent() == c_gravel)
 784                                                 break;
 785
 786                                         vm->m_area.add_y(em, i, -1);
 787                                 }
 788
 789                                 // Stop if out of area
 790                                 //if(vmanip.m_area.contains(i) == false)
 791                                 if (y < node_min.Y)
 792                                         break;
 793
 794                                 if (n->getContent() == c_dirt ||
 795                                                 n->getContent() == c_dirt_with_grass) {
 796                                         // Make it exactly mud
 797                                         n->setContent(c_dirt);
 798
 799                                         // Don't flow it if the stuff under it is not mud
 800                                         {
 801                                                 u32 i2 = i;
 802                                                 vm->m_area.add_y(em, i2, -1);
 803                                                 // Cancel if out of area
 804                                                 if (vm->m_area.contains(i2) == false)
 805                                                         continue;
 806                                                 MapNode *n2 = &vm->m_data[i2];
 807                                                 if (n2->getContent() != c_dirt &&
 808                                                                 n2->getContent() != c_dirt_with_grass)
 809                                                         continue;
 810                                         }
 811                                 }
 812
 813                                 v3s16 dirs4[4] = {
 814                                         v3s16(0, 0, 1), // back
 815                                         v3s16(1, 0, 0), // right
 816                                         v3s16(0, 0, -1), // front
 817                                         v3s16(-1, 0, 0), // left
 818                                 };
 819
 820                                 // Check that upper is air or doesn't exist.
 821                                 // Cancel dropping if upper keeps it in place
 822                                 u32 i3 = i;
 823                                 vm->m_area.add_y(em, i3, 1);
 824                                 if (vm->m_area.contains(i3) == true &&
 825                                                 ndef->get(vm->m_data[i3]).walkable)
 826                                         continue;
 827
 828                                 // Drop mud on side
 829                                 for (u32 di = 0; di < 4; di++) {
 830                                         v3s16 dirp = dirs4[di];
 831                                         u32 i2 = i;
 832                                         // Move to side
 833                                         vm->m_area.add_p(em, i2, dirp);
 834                                         // Fail if out of area
 835                                         if (vm->m_area.contains(i2) == false)
 836                                                 continue;
 837                                         // Check that side is air
 838                                         MapNode *n2 = &vm->m_data[i2];
 839                                         if (ndef->get(*n2).walkable)
 840                                                 continue;
 841                                         // Check that under side is air
 842                                         vm->m_area.add_y(em, i2, -1);
 843                                         if (vm->m_area.contains(i2) == false)
 844                                                 continue;
 845                                         n2 = &vm->m_data[i2];
 846                                         if (ndef->get(*n2).walkable)
 847                                                 continue;
 848                                         // Loop further down until not air
 849                                         bool dropped_to_unknown = false;
 850                                         do {
 851                                                 vm->m_area.add_y(em, i2, -1);
 852                                                 n2 = &vm->m_data[i2];
 853                                                 // if out of known area
 854                                                 if (vm->m_area.contains(i2) == false ||
 855                                                                 n2->getContent() == CONTENT_IGNORE) {
 856                                                         dropped_to_unknown = true;
 857                                                         break;
 858                                                 }
 859                                         } while (ndef->get(*n2).walkable == false);
 860                                         // Loop one up so that we're in air
 861                                         vm->m_area.add_y(em, i2, 1);
 862                                         n2 = &vm->m_data[i2];
 863
 864                                         bool old_is_water = (n->getContent() == c_water_source);
 865                                         // Move mud to new place
 866                                         if (!dropped_to_unknown) {
 867                                                 *n2 = *n;
 868                                                 // Set old place to be air (or water)
 869                                                 if (old_is_water)
 870                                                         *n = MapNode(c_water_source);
 871                                                 else
 872                                                         *n = MapNode(CONTENT_AIR);
 873                                         }
 874
 875                                         // Done
 876                                         break;
 877                                 }
 878                         }
 879                         }
 880                 }
 881         }
 882 }
 883
 884
 885 void MapgenV6::placeTreesAndJungleGrass()
 886 {
 887         //TimeTaker t("placeTrees");
 888         if (node_max.Y < water_level)
 889                 return;
 890
 891         PseudoRandom grassrandom(blockseed + 53);
 892         content_t c_junglegrass = ndef->getId("mapgen_junglegrass");
 893         // if we don't have junglegrass, don't place cignore... that's bad
 894         if (c_junglegrass == CONTENT_IGNORE)
 895                 c_junglegrass = CONTENT_AIR;
 896         MapNode n_junglegrass(c_junglegrass);
 897         v3s16 em = vm->m_area.getExtent();
 898
 899         // Divide area into parts
 900         s16 div = 8;
 901         s16 sidelen = central_area_size.X / div;
 902         double area = sidelen * sidelen;
 903
 904         // N.B.  We must add jungle grass first, since tree leaves will
 905         // obstruct the ground, giving us a false ground level
 906         for (s16 z0 = 0; z0 < div; z0++)
 907         for (s16 x0 = 0; x0 < div; x0++) {
 908                 // Center position of part of division
 909                 v2s16 p2d_center(
 910                         node_min.X + sidelen / 2 + sidelen * x0,
 911                         node_min.Z + sidelen / 2 + sidelen * z0
 912                 );
 913                 // Minimum edge of part of division
 914                 v2s16 p2d_min(
 915                         node_min.X + sidelen * x0,
 916                         node_min.Z + sidelen * z0
 917                 );
 918                 // Maximum edge of part of division
 919                 v2s16 p2d_max(
 920                         node_min.X + sidelen + sidelen * x0 - 1,
 921                         node_min.Z + sidelen + sidelen * z0 - 1
 922                 );
 923
 924                 // Get biome at center position of part of division
 925                 BiomeV6Type bt = getBiome(p2d_center);
 926
 927                 // Amount of trees
 928                 u32 tree_count;
 929                 if (bt == BT_JUNGLE || bt == BT_TAIGA || bt == BT_NORMAL) {
 930                         tree_count = area * getTreeAmount(p2d_center);
 931                         if (bt == BT_JUNGLE)
 932                                 tree_count *= 4;
 933                 } else {
 934                         tree_count = 0;
 935                 }
 936
 937                 // Add jungle grass
 938                 if (bt == BT_JUNGLE) {
 939                         float humidity = getHumidity(p2d_center);
 940                         u32 grass_count = 5 * humidity * tree_count;
 941                         for (u32 i = 0; i < grass_count; i++) {
 942                                 s16 x = grassrandom.range(p2d_min.X, p2d_max.X);
 943                                 s16 z = grassrandom.range(p2d_min.Y, p2d_max.Y);
 944                                 int mapindex = central_area_size.X * (z - node_min.Z)
 945                                                                 + (x - node_min.X);
 946                                 s16 y = heightmap[mapindex];
 947                                 if (y < water_level)
 948                                         continue;
 949
 950                                 u32 vi = vm->m_area.index(x, y, z);
 951                                 // place on dirt_with_grass, since we know it is exposed to sunlight
 952                                 if (vm->m_data[vi].getContent() == c_dirt_with_grass) {
 953                                         vm->m_area.add_y(em, vi, 1);
 954                                         vm->m_data[vi] = n_junglegrass;
 955                                 }
 956                         }
 957                 }
 958
 959                 // Put trees in random places on part of division
 960                 for (u32 i = 0; i < tree_count; i++) {
 961                         s16 x = myrand_range(p2d_min.X, p2d_max.X);
 962                         s16 z = myrand_range(p2d_min.Y, p2d_max.Y);
 963                         int mapindex = central_area_size.X * (z - node_min.Z)
 964                                                         + (x - node_min.X);
 965                         s16 y = heightmap[mapindex];
 966                         // Don't make a tree under water level
 967                         // Don't make a tree so high that it doesn't fit
 968                         if (y < water_level || y > node_max.Y - 6)
 969                                 continue;
 970
 971                         v3s16 p(x, y, z);
 972                         // Trees grow only on mud and grass and snowblock
 973                         {
 974                                 u32 i = vm->m_area.index(p);
 975                                 content_t c = vm->m_data[i].getContent();
 976                                 if (c != c_dirt &&
 977                                                 c != c_dirt_with_grass &&
 978                                                 c != c_dirt_with_snow &&
 979                                                 c != c_snowblock)
 980                                         continue;
 981                         }
 982                         p.Y++;
 983
 984                         // Make a tree
 985                         if (bt == BT_JUNGLE) {
 986                                 treegen::make_jungletree(*vm, p, ndef, myrand());
 987                         } else if (bt == BT_TAIGA) {
 988                                 treegen::make_pine_tree(*vm, p - v3s16(0, 1, 0), ndef, myrand());
 989                         } else if (bt == BT_NORMAL) {
 990                                 bool is_apple_tree = (myrand_range(0, 3) == 0) &&
 991                                                         getHaveAppleTree(v2s16(x, z));
 992                                 treegen::make_tree(*vm, p, is_apple_tree, ndef, myrand());
 993                         }
 994                 }
 995         }
 996         //printf("placeTreesAndJungleGrass: %dms\n", t.stop());
 997 }
 998
 999
1000 void MapgenV6::growGrass() // Add surface nodes
1001 {
1002         MapNode n_dirt_with_grass(c_dirt_with_grass);
1003         MapNode n_dirt_with_snow(c_dirt_with_snow);
1004         MapNode n_snowblock(c_snowblock);
1005         MapNode n_snow(c_snow);
1006         v3s16 em = vm->m_area.getExtent();
1007
1008         u32 index = 0;
1009         for (s16 z = full_node_min.Z; z <= full_node_max.Z; z++)
1010         for (s16 x = full_node_min.X; x <= full_node_max.X; x++, index++) {
1011                 // Find the lowest surface to which enough light ends up to make
1012                 // grass grow.  Basically just wait until not air and not leaves.
1013                 s16 surface_y = 0;
1014                 {
1015                         u32 i = vm->m_area.index(x, node_max.Y, z);
1016                         s16 y;
1017                         // Go to ground level
1018                         for (y = node_max.Y; y >= full_node_min.Y; y--) {
1019                                 MapNode &n = vm->m_data[i];
1020                                 if (ndef->get(n).param_type != CPT_LIGHT ||
1021                                                 ndef->get(n).liquid_type != LIQUID_NONE ||
1022                                                 n.getContent() == c_ice)
1023                                         break;
1024                                 vm->m_area.add_y(em, i, -1);
1025                         }
1026                         surface_y = (y >= full_node_min.Y) ? y : full_node_min.Y;
1027                 }
1028
1029                 BiomeV6Type bt = getBiome(index, v2s16(x, z));
1030                 u32 i = vm->m_area.index(x, surface_y, z);
1031                 content_t c = vm->m_data[i].getContent();
1032                 if (surface_y >= water_level - 20) {
1033                         if (bt == BT_TAIGA && c == c_dirt) {
1034                                 vm->m_data[i] = n_snowblock;
1035                                 vm->m_area.add_y(em, i, -1);
1036                                 vm->m_data[i] = n_dirt_with_snow;
1037                         } else if (bt == BT_TUNDRA) {
1038                                 if (c == c_dirt) {
1039                                         vm->m_data[i] = n_dirt_with_snow;
1040                                 } else if (c == c_stone && surface_y < node_max.Y) {
1041                                         vm->m_area.add_y(em, i, 1);
1042                                         vm->m_data[i] = n_snow;
1043                                 }
1044                         } else if (c == c_dirt) {
1045                                 vm->m_data[i] = n_dirt_with_grass;
1046                         }
1047                 }
1048         }
1049 }
1050
1051
1052 void MapgenV6::generateCaves(int max_stone_y)
1053 {
1054         float cave_amount = NoisePerlin2D(np_cave, node_min.X, node_min.Y, seed);
1055         int volume_nodes = (node_max.X - node_min.X + 1) *
1056                                            (node_max.Y - node_min.Y + 1) * MAP_BLOCKSIZE;
1057         cave_amount = MYMAX(0.0, cave_amount);
1058         u32 caves_count = cave_amount * volume_nodes / 50000;
1059         u32 bruises_count = 1;
1060         PseudoRandom ps(blockseed + 21343);
1061         PseudoRandom ps2(blockseed + 1032);
1062
1063         if (ps.range(1, 6) == 1)
1064                 bruises_count = ps.range(0, ps.range(0, 2));
1065
1066         if (getBiome(v2s16(node_min.X, node_min.Z)) == BT_DESERT) {
1067                 caves_count   /= 3;
1068                 bruises_count /= 3;
1069         }
1070
1071         for (u32 i = 0; i < caves_count + bruises_count; i++) {
1072                 CavesV6 cave(ndef, &gennotify, water_level, c_water_source, c_lava_source);
1073
1074                 bool large_cave = (i >= caves_count);
1075                 cave.makeCave(vm, node_min, node_max, &ps, &ps2,
1076                         large_cave, max_stone_y, heightmap);
1077         }
1078 }