src/mapgen_v6.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2013 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 #include "mapgen.h"
  21 #include "voxel.h"
  22 #include "noise.h"
  23 #include "mapblock.h"
  24 #include "mapnode.h"
  25 #include "map.h"
  26 //#include "serverobject.h"
  27 #include "content_sao.h"
  28 #include "nodedef.h"
  29 #include "content_mapnode.h" // For content_mapnode_get_new_name
  30 #include "voxelalgorithms.h"
  31 #include "profiler.h"
  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 FlagDesc flagdesc_mapgen_v6[] = {
  42         {"jungles",    MGV6_JUNGLES},
  43         {"biomeblend", MGV6_BIOMEBLEND},
  44         {"mudflow",    MGV6_MUDFLOW},
  45         {"snowbiomes", MGV6_SNOWBIOMES},
  46         {NULL,         0}
  47 };
  48
  49 ///////////////////////////////////////////////////////////////////////////////
  50
  51
  52 MapgenV6::MapgenV6(int mapgenid, MapgenParams *params, EmergeManager *emerge)
  53         : Mapgen(mapgenid, params, emerge)
  54 {
  55         this->m_emerge = emerge;
  56         this->ystride = csize.X; //////fix this
  57
  58         this->heightmap = new s16[csize.X * csize.Z];
  59
  60         MapgenV6Params *sp = (MapgenV6Params *)params->sparams;
  61         this->spflags     = sp->spflags;
  62         this->freq_desert = sp->freq_desert;
  63         this->freq_beach  = sp->freq_beach;
  64
  65         np_cave        = &sp->np_cave;
  66         np_humidity    = &sp->np_humidity;
  67         np_trees       = &sp->np_trees;
  68         np_apple_trees = &sp->np_apple_trees;
  69
  70         //// Create noise objects
  71         noise_terrain_base   = new Noise(&sp->np_terrain_base,   seed, csize.X, csize.Y);
  72         noise_terrain_higher = new Noise(&sp->np_terrain_higher, seed, csize.X, csize.Y);
  73         noise_steepness      = new Noise(&sp->np_steepness,      seed, csize.X, csize.Y);
  74         noise_height_select  = new Noise(&sp->np_height_select,  seed, csize.X, csize.Y);
  75         noise_mud            = new Noise(&sp->np_mud,            seed, csize.X, csize.Y);
  76         noise_beach          = new Noise(&sp->np_beach,          seed, csize.X, csize.Y);
  77         noise_biome          = new Noise(&sp->np_biome,          seed,
  78                         csize.X + 2 * MAP_BLOCKSIZE, csize.Y + 2 * MAP_BLOCKSIZE);
  79         noise_humidity       = new Noise(&sp->np_humidity,       seed,
  80                         csize.X + 2 * MAP_BLOCKSIZE, csize.Y + 2 * MAP_BLOCKSIZE);
  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_desert_stone    = ndef->getId("mapgen_desert_stone");
  93         c_desert_sand     = ndef->getId("mapgen_desert_sand");
  94         c_dirt_with_snow  = ndef->getId("mapgen_dirt_with_snow");
  95         c_snow            = ndef->getId("mapgen_snow");
  96         c_snowblock       = ndef->getId("mapgen_snowblock");
  97         c_ice             = ndef->getId("mapgen_ice");
  98
  99         c_cobble          = ndef->getId("mapgen_cobble");
 100         c_stair_cobble    = ndef->getId("mapgen_stair_cobble");
 101         c_mossycobble     = ndef->getId("mapgen_mossycobble");
 102
 103         if (c_desert_sand == CONTENT_IGNORE)
 104                 c_desert_sand = c_sand;
 105         if (c_desert_stone == CONTENT_IGNORE)
 106                 c_desert_stone = c_stone;
 107         if (c_mossycobble == CONTENT_IGNORE)
 108                 c_mossycobble = c_cobble;
 109         if (c_stair_cobble == CONTENT_IGNORE)
 110                 c_stair_cobble = c_cobble;
 111         if (c_dirt_with_snow == CONTENT_IGNORE)
 112                 c_dirt_with_snow = c_dirt_with_grass;
 113         if (c_snow == CONTENT_IGNORE)
 114                 c_snow = CONTENT_AIR;
 115         if (c_snowblock == CONTENT_IGNORE)
 116                 c_snowblock = c_dirt_with_grass;
 117         if (c_ice == CONTENT_IGNORE)
 118                 c_ice = c_water_source;
 119 }
 120
 121
 122 MapgenV6::~MapgenV6()
 123 {
 124         delete noise_terrain_base;
 125         delete noise_terrain_higher;
 126         delete noise_steepness;
 127         delete noise_height_select;
 128         delete noise_mud;
 129         delete noise_beach;
 130         delete noise_biome;
 131         delete noise_humidity;
 132
 133         delete[] heightmap;
 134 }
 135
 136
 137 MapgenV6Params::MapgenV6Params()
 138 {
 139         spflags     = MGV6_BIOMEBLEND | MGV6_MUDFLOW;
 140         freq_desert = 0.45;
 141         freq_beach  = 0.15;
 142
 143         np_terrain_base   = NoiseParams(-4,   20.0, v3f(250.0, 250.0, 250.0), 82341,  5, 0.6,  2.0);
 144         np_terrain_higher = NoiseParams(20,   16.0, v3f(500.0, 500.0, 500.0), 85039,  5, 0.6,  2.0);
 145         np_steepness      = NoiseParams(0.85, 0.5,  v3f(125.0, 125.0, 125.0), -932,   5, 0.7,  2.0);
 146         np_height_select  = NoiseParams(0,    1.0,  v3f(250.0, 250.0, 250.0), 4213,   5, 0.69, 2.0);
 147         np_mud            = NoiseParams(4,    2.0,  v3f(200.0, 200.0, 200.0), 91013,  3, 0.55, 2.0);
 148         np_beach          = NoiseParams(0,    1.0,  v3f(250.0, 250.0, 250.0), 59420,  3, 0.50, 2.0);
 149         np_biome          = NoiseParams(0,    1.0,  v3f(500.0, 500.0, 500.0), 9130,   3, 0.50, 2.0);
 150         np_cave           = NoiseParams(6,    6.0,  v3f(250.0, 250.0, 250.0), 34329,  3, 0.50, 2.0);
 151         np_humidity       = NoiseParams(0.5,  0.5,  v3f(500.0, 500.0, 500.0), 72384,  3, 0.50, 2.0);
 152         np_trees          = NoiseParams(0,    1.0,  v3f(125.0, 125.0, 125.0), 2,      4, 0.66, 2.0);
 153         np_apple_trees    = NoiseParams(0,    1.0,  v3f(100.0, 100.0, 100.0), 342902, 3, 0.45, 2.0);
 154 }
 155
 156
 157 void MapgenV6Params::readParams(const Settings *settings)
 158 {
 159         settings->getFlagStrNoEx("mgv6_spflags", spflags, flagdesc_mapgen_v6);
 160         settings->getFloatNoEx("mgv6_freq_desert", freq_desert);
 161         settings->getFloatNoEx("mgv6_freq_beach",  freq_beach);
 162
 163         settings->getNoiseParams("mgv6_np_terrain_base",   np_terrain_base);
 164         settings->getNoiseParams("mgv6_np_terrain_higher", np_terrain_higher);
 165         settings->getNoiseParams("mgv6_np_steepness",      np_steepness);
 166         settings->getNoiseParams("mgv6_np_height_select",  np_height_select);
 167         settings->getNoiseParams("mgv6_np_mud",            np_mud);
 168         settings->getNoiseParams("mgv6_np_beach",          np_beach);
 169         settings->getNoiseParams("mgv6_np_biome",          np_biome);
 170         settings->getNoiseParams("mgv6_np_cave",           np_cave);
 171         settings->getNoiseParams("mgv6_np_humidity",       np_humidity);
 172         settings->getNoiseParams("mgv6_np_trees",          np_trees);
 173         settings->getNoiseParams("mgv6_np_apple_trees",    np_apple_trees);
 174 }
 175
 176
 177 void MapgenV6Params::writeParams(Settings *settings) const
 178 {
 179         settings->setFlagStr("mgv6_spflags", spflags, flagdesc_mapgen_v6, (u32)-1);
 180         settings->setFloat("mgv6_freq_desert", freq_desert);
 181         settings->setFloat("mgv6_freq_beach",  freq_beach);
 182
 183         settings->setNoiseParams("mgv6_np_terrain_base",   np_terrain_base);
 184         settings->setNoiseParams("mgv6_np_terrain_higher", np_terrain_higher);
 185         settings->setNoiseParams("mgv6_np_steepness",      np_steepness);
 186         settings->setNoiseParams("mgv6_np_height_select",  np_height_select);
 187         settings->setNoiseParams("mgv6_np_mud",            np_mud);
 188         settings->setNoiseParams("mgv6_np_beach",          np_beach);
 189         settings->setNoiseParams("mgv6_np_biome",          np_biome);
 190         settings->setNoiseParams("mgv6_np_cave",           np_cave);
 191         settings->setNoiseParams("mgv6_np_humidity",       np_humidity);
 192         settings->setNoiseParams("mgv6_np_trees",          np_trees);
 193         settings->setNoiseParams("mgv6_np_apple_trees",    np_apple_trees);
 194 }
 195
 196
 197 //////////////////////// Some helper functions for the map generator
 198
 199
 200 // Returns Y one under area minimum if not found
 201 s16 MapgenV6::find_stone_level(v2s16 p2d)
 202 {
 203         v3s16 em = vm->m_area.getExtent();
 204         s16 y_nodes_max = vm->m_area.MaxEdge.Y;
 205         s16 y_nodes_min = vm->m_area.MinEdge.Y;
 206         u32 i = vm->m_area.index(p2d.X, y_nodes_max, p2d.Y);
 207         s16 y;
 208
 209         for (y = y_nodes_max; y >= y_nodes_min; y--) {
 210                 content_t c = vm->m_data[i].getContent();
 211                 if (c != CONTENT_IGNORE && (c == c_stone || c == c_desert_stone))
 212                         break;
 213
 214                 vm->m_area.add_y(em, i, -1);
 215         }
 216         return (y >= y_nodes_min) ? y : y_nodes_min - 1;
 217 }
 218
 219
 220 // Required by mapgen.h
 221 bool MapgenV6::block_is_underground(u64 seed, v3s16 blockpos)
 222 {
 223         /*s16 minimum_groundlevel = (s16)get_sector_minimum_ground_level(
 224                         seed, v2s16(blockpos.X, blockpos.Z));*/
 225         // Nah, this is just a heuristic, just return something
 226         s16 minimum_groundlevel = water_level;
 227
 228         if(blockpos.Y * MAP_BLOCKSIZE + MAP_BLOCKSIZE <= minimum_groundlevel)
 229                 return true;
 230         else
 231                 return false;
 232 }
 233
 234
 235 //////////////////////// Base terrain height functions
 236
 237 float MapgenV6::baseTerrainLevel(float terrain_base, float terrain_higher,
 238         float steepness, float height_select)
 239 {
 240         float base   = 1 + terrain_base;
 241         float higher = 1 + terrain_higher;
 242
 243         // Limit higher ground level to at least base
 244         if(higher < base)
 245                 higher = base;
 246
 247         // Steepness factor of cliffs
 248         float b = steepness;
 249         b = rangelim(b, 0.0, 1000.0);
 250         b = 5 * b * b * b * b * b * b * b;
 251         b = rangelim(b, 0.5, 1000.0);
 252
 253         // Values 1.5...100 give quite horrible looking slopes
 254         if (b > 1.5 && b < 100.0)
 255                 b = (b < 10.0) ? 1.5 : 100.0;
 256
 257         float a_off = -0.20; // Offset to more low
 258         float a = 0.5 + b * (a_off + height_select);
 259         a = rangelim(a, 0.0, 1.0); // Limit
 260
 261         return base * (1.0 - a) + higher * a;
 262 }
 263
 264
 265 float MapgenV6::baseTerrainLevelFromNoise(v2s16 p)
 266 {
 267         if (flags & MG_FLAT)
 268                 return water_level;
 269
 270         float terrain_base   = NoisePerlin2D_PO(&noise_terrain_base->np,
 271                                                         p.X, 0.5, p.Y, 0.5, seed);
 272         float terrain_higher = NoisePerlin2D_PO(&noise_terrain_higher->np,
 273                                                         p.X, 0.5, p.Y, 0.5, seed);
 274         float steepness      = NoisePerlin2D_PO(&noise_steepness->np,
 275                                                         p.X, 0.5, p.Y, 0.5, seed);
 276         float height_select  = NoisePerlin2D_PO(&noise_height_select->np,
 277                                                         p.X, 0.5, p.Y, 0.5, seed);
 278
 279         return baseTerrainLevel(terrain_base, terrain_higher,
 280                                                         steepness, height_select);
 281 }
 282
 283
 284 float MapgenV6::baseTerrainLevelFromMap(v2s16 p)
 285 {
 286         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 287         return baseTerrainLevelFromMap(index);
 288 }
 289
 290
 291 float MapgenV6::baseTerrainLevelFromMap(int index)
 292 {
 293         if (flags & MG_FLAT)
 294                 return water_level;
 295
 296         float terrain_base   = noise_terrain_base->result[index];
 297         float terrain_higher = noise_terrain_higher->result[index];
 298         float steepness      = noise_steepness->result[index];
 299         float height_select  = noise_height_select->result[index];
 300
 301         return baseTerrainLevel(terrain_base, terrain_higher,
 302                                                         steepness, height_select);
 303 }
 304
 305
 306 s16 MapgenV6::find_ground_level_from_noise(u64 seed, v2s16 p2d, s16 precision)
 307 {
 308         return baseTerrainLevelFromNoise(p2d) + AVERAGE_MUD_AMOUNT;
 309 }
 310
 311
 312 int MapgenV6::getGroundLevelAtPoint(v2s16 p)
 313 {
 314         return baseTerrainLevelFromNoise(p) + AVERAGE_MUD_AMOUNT;
 315 }
 316
 317
 318 //////////////////////// Noise functions
 319
 320 float MapgenV6::getMudAmount(v2s16 p)
 321 {
 322         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 323         return getMudAmount(index);
 324 }
 325
 326
 327 bool MapgenV6::getHaveBeach(v2s16 p)
 328 {
 329         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 330         return getHaveBeach(index);
 331 }
 332
 333
 334 BiomeV6Type MapgenV6::getBiome(v2s16 p)
 335 {
 336         int index = (p.Y - full_node_min.Z) * (ystride + 2 * MAP_BLOCKSIZE)
 337                         + (p.X - full_node_min.X);
 338         return getBiome(index, p);
 339 }
 340
 341
 342 float MapgenV6::getHumidity(v2s16 p)
 343 {
 344         /*double noise = noise2d_perlin(
 345                 0.5+(float)p.X/500, 0.5+(float)p.Y/500,
 346                 seed+72384, 4, 0.66);
 347         noise = (noise + 1.0)/2.0;*/
 348
 349         int index = (p.Y - full_node_min.Z) * (ystride + 2 * MAP_BLOCKSIZE)
 350                         + (p.X - full_node_min.X);
 351         float noise = noise_humidity->result[index];
 352
 353         if (noise < 0.0)
 354                 noise = 0.0;
 355         if (noise > 1.0)
 356                 noise = 1.0;
 357         return noise;
 358 }
 359
 360
 361 float MapgenV6::getTreeAmount(v2s16 p)
 362 {
 363         /*double noise = noise2d_perlin(
 364                         0.5+(float)p.X/125, 0.5+(float)p.Y/125,
 365                         seed+2, 4, 0.66);*/
 366
 367         float noise = NoisePerlin2D(np_trees, p.X, p.Y, seed);
 368         float zeroval = -0.39;
 369         if (noise < zeroval)
 370                 return 0;
 371         else
 372                 return 0.04 * (noise - zeroval) / (1.0 - zeroval);
 373 }
 374
 375
 376 bool MapgenV6::getHaveAppleTree(v2s16 p)
 377 {
 378         /*is_apple_tree = noise2d_perlin(
 379                 0.5+(float)p.X/100, 0.5+(float)p.Z/100,
 380                 data->seed+342902, 3, 0.45) > 0.2;*/
 381
 382         float noise = NoisePerlin2D(np_apple_trees, p.X, p.Y, seed);
 383
 384         return noise > 0.2;
 385 }
 386
 387
 388 float MapgenV6::getMudAmount(int index)
 389 {
 390         if (flags & MG_FLAT)
 391                 return AVERAGE_MUD_AMOUNT;
 392
 393         /*return ((float)AVERAGE_MUD_AMOUNT + 2.0 * noise2d_perlin(
 394                         0.5+(float)p.X/200, 0.5+(float)p.Y/200,
 395                         seed+91013, 3, 0.55));*/
 396
 397         return noise_mud->result[index];
 398 }
 399
 400
 401 bool MapgenV6::getHaveBeach(int index)
 402 {
 403         // Determine whether to have sand here
 404         /*double sandnoise = noise2d_perlin(
 405                         0.2+(float)p2d.X/250, 0.7+(float)p2d.Y/250,
 406                         seed+59420, 3, 0.50);*/
 407
 408         float sandnoise = noise_beach->result[index];
 409         return (sandnoise > freq_beach);
 410 }
 411
 412
 413 BiomeV6Type MapgenV6::getBiome(int index, v2s16 p)
 414 {
 415         // Just do something very simple as for now
 416         /*double d = noise2d_perlin(
 417                         0.6+(float)p2d.X/250, 0.2+(float)p2d.Y/250,
 418                         seed+9130, 3, 0.50);*/
 419
 420         float d = noise_biome->result[index];
 421         float h = noise_humidity->result[index];
 422
 423         if (spflags & MGV6_SNOWBIOMES) {
 424                 float blend = (spflags & MGV6_BIOMEBLEND) ? noise2d(p.X, p.Y, seed) / 40 : 0;
 425
 426                 if (d > FREQ_HOT + blend) {
 427                         if (h > FREQ_JUNGLE + blend)
 428                                 return BT_JUNGLE;
 429                         else
 430                                 return BT_DESERT;
 431                 } else if (d < FREQ_SNOW + blend) {
 432                         if (h > FREQ_TAIGA + blend)
 433                                 return BT_TAIGA;
 434                         else
 435                                 return BT_TUNDRA;
 436                 } else {
 437                         return BT_NORMAL;
 438                 }
 439         } else {
 440                 if (d > freq_desert)
 441                         return BT_DESERT;
 442
 443                 if ((spflags & MGV6_BIOMEBLEND) && (d > freq_desert - 0.10) &&
 444                                 ((noise2d(p.X, p.Y, seed) + 1.0) > (freq_desert - d) * 20.0))
 445                         return BT_DESERT;
 446
 447                 if ((spflags & MGV6_JUNGLES) && h > 0.75)
 448                         return BT_JUNGLE;
 449                 else
 450                         return BT_NORMAL;
 451         }
 452 }
 453
 454
 455 u32 MapgenV6::get_blockseed(u64 seed, v3s16 p)
 456 {
 457         s32 x = p.X, y = p.Y, z = p.Z;
 458         return (u32)(seed % 0x100000000ULL) + z * 38134234 + y * 42123 + x * 23;
 459 }
 460
 461
 462 //////////////////////// Map generator
 463
 464 void MapgenV6::makeChunk(BlockMakeData *data)
 465 {
 466         // Pre-conditions
 467         assert(data->vmanip);
 468         assert(data->nodedef);
 469         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 470                    data->blockpos_requested.Y >= data->blockpos_min.Y &&
 471                    data->blockpos_requested.Z >= data->blockpos_min.Z);
 472         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 473                    data->blockpos_requested.Y <= data->blockpos_max.Y &&
 474                    data->blockpos_requested.Z <= data->blockpos_max.Z);
 475
 476         this->generating = true;
 477         this->vm   = data->vmanip;
 478         this->ndef = data->nodedef;
 479
 480         // Hack: use minimum block coords for old code that assumes a single block
 481         v3s16 blockpos_min = data->blockpos_min;
 482         v3s16 blockpos_max = data->blockpos_max;
 483
 484         // Area of central chunk
 485         node_min = blockpos_min * MAP_BLOCKSIZE;
 486         node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 487
 488         // Full allocated area
 489         full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
 490         full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 491
 492         central_area_size = node_max - node_min + v3s16(1, 1, 1);
 493         assert(central_area_size.X == central_area_size.Z);
 494
 495         int volume_blocks = (blockpos_max.X - blockpos_min.X + 1)
 496                                           * (blockpos_max.Y - blockpos_min.Y + 1)
 497                                           * (blockpos_max.Z - blockpos_max.Z + 1);
 498
 499         volume_nodes = volume_blocks *
 500                 MAP_BLOCKSIZE * MAP_BLOCKSIZE * MAP_BLOCKSIZE;
 501
 502         // Create a block-specific seed
 503         blockseed = get_blockseed(data->seed, full_node_min);
 504
 505         // Make some noise
 506         calculateNoise();
 507
 508         // Maximum height of the stone surface and obstacles.
 509         // This is used to guide the cave generation
 510         s16 stone_surface_max_y;
 511
 512         // Generate general ground level to full area
 513         stone_surface_max_y = generateGround();
 514
 515         // Create initial heightmap to limit caves
 516         updateHeightmap(node_min, node_max);
 517
 518         const s16 max_spread_amount = MAP_BLOCKSIZE;
 519         // Limit dirt flow area by 1 because mud is flown into neighbors.
 520         s16 mudflow_minpos = -max_spread_amount + 1;
 521         s16 mudflow_maxpos = central_area_size.X + max_spread_amount - 2;
 522
 523         // Loop this part, it will make stuff look older and newer nicely
 524         const u32 age_loops = 2;
 525         for (u32 i_age = 0; i_age < age_loops; i_age++) { // Aging loop
 526                 // Make caves (this code is relatively horrible)
 527                 if (flags & MG_CAVES)
 528                         generateCaves(stone_surface_max_y);
 529
 530                 // Add mud to the central chunk
 531                 addMud();
 532
 533                 // Flow mud away from steep edges
 534                 if (spflags & MGV6_MUDFLOW)
 535                         flowMud(mudflow_minpos, mudflow_maxpos);
 536
 537         }
 538
 539         // Update heightmap after mudflow
 540         updateHeightmap(node_min, node_max);
 541
 542         // Add dungeons
 543         if ((flags & MG_DUNGEONS) && (stone_surface_max_y >= node_min.Y)) {
 544                 DungeonParams dp;
 545
 546                 dp.np_rarity  = nparams_dungeon_rarity;
 547                 dp.np_density = nparams_dungeon_density;
 548                 dp.np_wetness = nparams_dungeon_wetness;
 549                 dp.c_water    = c_water_source;
 550                 if (getBiome(0, v2s16(node_min.X, node_min.Z)) == BT_DESERT) {
 551                         dp.c_cobble = c_desert_stone;
 552                         dp.c_moss   = c_desert_stone;
 553                         dp.c_stair  = c_desert_stone;
 554
 555                         dp.diagonal_dirs = true;
 556                         dp.mossratio     = 0.0;
 557                         dp.holesize      = v3s16(2, 3, 2);
 558                         dp.roomsize      = v3s16(2, 5, 2);
 559                         dp.notifytype    = GENNOTIFY_TEMPLE;
 560                 } else {
 561                         dp.c_cobble = c_cobble;
 562                         dp.c_moss   = c_mossycobble;
 563                         dp.c_stair  = c_stair_cobble;
 564
 565                         dp.diagonal_dirs = false;
 566                         dp.mossratio     = 3.0;
 567                         dp.holesize      = v3s16(1, 2, 1);
 568                         dp.roomsize      = v3s16(0, 0, 0);
 569                         dp.notifytype    = GENNOTIFY_DUNGEON;
 570                 }
 571
 572                 DungeonGen dgen(this, &dp);
 573                 dgen.generate(blockseed, full_node_min, full_node_max);
 574         }
 575
 576         // Add top and bottom side of water to transforming_liquid queue
 577         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 578
 579         // Add surface nodes
 580         growGrass();
 581
 582         // Generate some trees, and add grass, if a jungle
 583         if (flags & MG_TREES)
 584                 placeTreesAndJungleGrass();
 585
 586         // Generate the registered decorations
 587         m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
 588
 589         // Generate the registered ores
 590         m_emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
 591
 592         // Calculate lighting
 593         if (flags & MG_LIGHT)
 594                 calcLighting(node_min, node_max);
 595
 596         this->generating = false;
 597 }
 598
 599
 600 void MapgenV6::calculateNoise()
 601 {
 602         int x = node_min.X;
 603         int z = node_min.Z;
 604         int fx = full_node_min.X;
 605         int fz = full_node_min.Z;
 606
 607         if (!(flags & MG_FLAT)) {
 608                 noise_terrain_base->perlinMap2D_PO(x, 0.5, z, 0.5);
 609                 noise_terrain_higher->perlinMap2D_PO(x, 0.5, z, 0.5);
 610                 noise_steepness->perlinMap2D_PO(x, 0.5, z, 0.5);
 611                 noise_height_select->perlinMap2D_PO(x, 0.5, z, 0.5);
 612                 noise_mud->perlinMap2D_PO(x, 0.5, z, 0.5);
 613         }
 614
 615         noise_beach->perlinMap2D_PO(x, 0.2, z, 0.7);
 616
 617         noise_biome->perlinMap2D_PO(fx, 0.6, fz, 0.2);
 618         noise_humidity->perlinMap2D_PO(fx, 0.0, fz, 0.0);
 619         // Humidity map does not need range limiting 0 to 1,
 620         // only humidity at point does
 621 }
 622
 623
 624 int MapgenV6::generateGround()
 625 {
 626         //TimeTaker timer1("Generating ground level");
 627         MapNode n_air(CONTENT_AIR), n_water_source(c_water_source);
 628         MapNode n_stone(c_stone), n_desert_stone(c_desert_stone);
 629         MapNode n_ice(c_ice);
 630         int stone_surface_max_y = -MAP_GENERATION_LIMIT;
 631
 632         u32 index = 0;
 633         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 634         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 635                 // Surface height
 636                 s16 surface_y = (s16)baseTerrainLevelFromMap(index);
 637
 638                 // Log it
 639                 if (surface_y > stone_surface_max_y)
 640                         stone_surface_max_y = surface_y;
 641
 642                 BiomeV6Type bt = getBiome(v2s16(x, z));
 643
 644                 // Fill ground with stone
 645                 v3s16 em = vm->m_area.getExtent();
 646                 u32 i = vm->m_area.index(x, node_min.Y, z);
 647                 for (s16 y = node_min.Y; y <= node_max.Y; y++) {
 648                         if (vm->m_data[i].getContent() == CONTENT_IGNORE) {
 649                                 if (y <= surface_y) {
 650                                         vm->m_data[i] = (y >= DESERT_STONE_BASE
 651                                                         && bt == BT_DESERT) ?
 652                                                 n_desert_stone : n_stone;
 653                                 } else if (y <= water_level) {
 654                                         vm->m_data[i] = (y >= ICE_BASE
 655                                                         && bt == BT_TUNDRA) ?
 656                                                 n_ice : n_water_source;
 657                                 } else {
 658                                         vm->m_data[i] = n_air;
 659                                 }
 660                         }
 661                         vm->m_area.add_y(em, i, 1);
 662                 }
 663         }
 664
 665         return stone_surface_max_y;
 666 }
 667
 668
 669 void MapgenV6::addMud()
 670 {
 671         // 15ms @cs=8
 672         //TimeTaker timer1("add mud");
 673         MapNode n_dirt(c_dirt), n_gravel(c_gravel);
 674         MapNode n_sand(c_sand), n_desert_sand(c_desert_sand);
 675         MapNode addnode;
 676
 677         u32 index = 0;
 678         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 679         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 680                 // Randomize mud amount
 681                 s16 mud_add_amount = getMudAmount(index) / 2.0 + 0.5;
 682
 683                 // Find ground level
 684                 s16 surface_y = find_stone_level(v2s16(x, z)); /////////////////optimize this!
 685
 686                 // Handle area not found
 687                 if (surface_y == vm->m_area.MinEdge.Y - 1)
 688                         continue;
 689
 690                 BiomeV6Type bt = getBiome(v2s16(x, z));
 691                 addnode = (bt == BT_DESERT) ? n_desert_sand : n_dirt;
 692
 693                 if (bt == BT_DESERT && surface_y + mud_add_amount <= water_level + 1) {
 694                         addnode = n_sand;
 695                 } else if (mud_add_amount <= 0) {
 696                         mud_add_amount = 1 - mud_add_amount;
 697                         addnode = n_gravel;
 698                 } else if (bt != BT_DESERT && getHaveBeach(index) &&
 699                                 surface_y + mud_add_amount <= water_level + 2) {
 700                         addnode = n_sand;
 701                 }
 702
 703                 if ((bt == BT_DESERT || bt == BT_TUNDRA) && surface_y > 20)
 704                         mud_add_amount = MYMAX(0, mud_add_amount - (surface_y - 20) / 5);
 705
 706                 /* If topmost node is grass, change it to mud.  It might be if it was
 707                 // flown to there from a neighboring chunk and then converted.
 708                 u32 i = vm->m_area.index(x, surface_y, z);
 709                 if (vm->m_data[i].getContent() == c_dirt_with_grass)
 710                         vm->m_data[i] = n_dirt;*/
 711
 712                 // Add mud on ground
 713                 s16 mudcount = 0;
 714                 v3s16 em = vm->m_area.getExtent();
 715                 s16 y_start = surface_y + 1;
 716                 u32 i = vm->m_area.index(x, y_start, z);
 717                 for (s16 y = y_start; y <= node_max.Y; y++) {
 718                         if (mudcount >= mud_add_amount)
 719                                 break;
 720
 721                         vm->m_data[i] = addnode;
 722                         mudcount++;
 723
 724                         vm->m_area.add_y(em, i, 1);
 725                 }
 726         }
 727 }
 728
 729
 730 void MapgenV6::flowMud(s16 &mudflow_minpos, s16 &mudflow_maxpos)
 731 {
 732         // 340ms @cs=8
 733         //TimeTaker timer1("flow mud");
 734
 735         // Iterate a few times
 736         for (s16 k = 0; k < 3; k++) {
 737                 for (s16 z = mudflow_minpos; z <= mudflow_maxpos; z++)
 738                 for (s16 x = mudflow_minpos; x <= mudflow_maxpos; x++) {
 739                         // Invert coordinates every 2nd iteration
 740                         if (k % 2 == 0) {
 741                                 x = mudflow_maxpos - (x - mudflow_minpos);
 742                                 z = mudflow_maxpos - (z - mudflow_minpos);
 743                         }
 744
 745                         // Node position in 2d
 746                         v2s16 p2d = v2s16(node_min.X, node_min.Z) + v2s16(x, z);
 747
 748                         v3s16 em = vm->m_area.getExtent();
 749                         u32 i = vm->m_area.index(p2d.X, node_max.Y, p2d.Y);
 750                         s16 y = node_max.Y;
 751
 752                         while (y >= node_min.Y) {
 753
 754                         for (;; y--) {
 755                                 MapNode *n = NULL;
 756                                 // Find mud
 757                                 for (; y >= node_min.Y; y--) {
 758                                         n = &vm->m_data[i];
 759                                         if (n->getContent() == c_dirt ||
 760                                                         n->getContent() == c_dirt_with_grass ||
 761                                                         n->getContent() == c_gravel)
 762                                                 break;
 763
 764                                         vm->m_area.add_y(em, i, -1);
 765                                 }
 766
 767                                 // Stop if out of area
 768                                 //if(vmanip.m_area.contains(i) == false)
 769                                 if (y < node_min.Y)
 770                                         break;
 771
 772                                 if (n->getContent() == c_dirt ||
 773                                                 n->getContent() == c_dirt_with_grass) {
 774                                         // Make it exactly mud
 775                                         n->setContent(c_dirt);
 776
 777                                         // Don't flow it if the stuff under it is not mud
 778                                         {
 779                                                 u32 i2 = i;
 780                                                 vm->m_area.add_y(em, i2, -1);
 781                                                 // Cancel if out of area
 782                                                 if (vm->m_area.contains(i2) == false)
 783                                                         continue;
 784                                                 MapNode *n2 = &vm->m_data[i2];
 785                                                 if (n2->getContent() != c_dirt &&
 786                                                                 n2->getContent() != c_dirt_with_grass)
 787                                                         continue;
 788                                         }
 789                                 }
 790
 791                                 v3s16 dirs4[4] = {
 792                                         v3s16(0, 0, 1), // back
 793                                         v3s16(1, 0, 0), // right
 794                                         v3s16(0, 0, -1), // front
 795                                         v3s16(-1, 0, 0), // left
 796                                 };
 797
 798                                 // Check that upper is air or doesn't exist.
 799                                 // Cancel dropping if upper keeps it in place
 800                                 u32 i3 = i;
 801                                 vm->m_area.add_y(em, i3, 1);
 802                                 if (vm->m_area.contains(i3) == true &&
 803                                                 ndef->get(vm->m_data[i3]).walkable)
 804                                         continue;
 805
 806                                 // Drop mud on side
 807                                 for(u32 di = 0; di < 4; di++) {
 808                                         v3s16 dirp = dirs4[di];
 809                                         u32 i2 = i;
 810                                         // Move to side
 811                                         vm->m_area.add_p(em, i2, dirp);
 812                                         // Fail if out of area
 813                                         if (vm->m_area.contains(i2) == false)
 814                                                 continue;
 815                                         // Check that side is air
 816                                         MapNode *n2 = &vm->m_data[i2];
 817                                         if (ndef->get(*n2).walkable)
 818                                                 continue;
 819                                         // Check that under side is air
 820                                         vm->m_area.add_y(em, i2, -1);
 821                                         if (vm->m_area.contains(i2) == false)
 822                                                 continue;
 823                                         n2 = &vm->m_data[i2];
 824                                         if (ndef->get(*n2).walkable)
 825                                                 continue;
 826                                         // Loop further down until not air
 827                                         bool dropped_to_unknown = false;
 828                                         do {
 829                                                 vm->m_area.add_y(em, i2, -1);
 830                                                 n2 = &vm->m_data[i2];
 831                                                 // if out of known area
 832                                                 if(vm->m_area.contains(i2) == false ||
 833                                                                 n2->getContent() == CONTENT_IGNORE) {
 834                                                         dropped_to_unknown = true;
 835                                                         break;
 836                                                 }
 837                                         } while (ndef->get(*n2).walkable == false);
 838                                         // Loop one up so that we're in air
 839                                         vm->m_area.add_y(em, i2, 1);
 840                                         n2 = &vm->m_data[i2];
 841
 842                                         bool old_is_water = (n->getContent() == c_water_source);
 843                                         // Move mud to new place
 844                                         if (!dropped_to_unknown) {
 845                                                 *n2 = *n;
 846                                                 // Set old place to be air (or water)
 847                                                 if(old_is_water)
 848                                                         *n = MapNode(c_water_source);
 849                                                 else
 850                                                         *n = MapNode(CONTENT_AIR);
 851                                         }
 852
 853                                         // Done
 854                                         break;
 855                                 }
 856                         }
 857                         }
 858                 }
 859         }
 860 }
 861
 862
 863 void MapgenV6::placeTreesAndJungleGrass()
 864 {
 865         //TimeTaker t("placeTrees");
 866         if (node_max.Y < water_level)
 867                 return;
 868
 869         PseudoRandom grassrandom(blockseed + 53);
 870         content_t c_junglegrass = ndef->getId("mapgen_junglegrass");
 871         // if we don't have junglegrass, don't place cignore... that's bad
 872         if (c_junglegrass == CONTENT_IGNORE)
 873                 c_junglegrass = CONTENT_AIR;
 874         MapNode n_junglegrass(c_junglegrass);
 875         v3s16 em = vm->m_area.getExtent();
 876
 877         // Divide area into parts
 878         s16 div = 8;
 879         s16 sidelen = central_area_size.X / div;
 880         double area = sidelen * sidelen;
 881
 882         // N.B.  We must add jungle grass first, since tree leaves will
 883         // obstruct the ground, giving us a false ground level
 884         for (s16 z0 = 0; z0 < div; z0++)
 885         for (s16 x0 = 0; x0 < div; x0++) {
 886                 // Center position of part of division
 887                 v2s16 p2d_center(
 888                         node_min.X + sidelen / 2 + sidelen * x0,
 889                         node_min.Z + sidelen / 2 + sidelen * z0
 890                 );
 891                 // Minimum edge of part of division
 892                 v2s16 p2d_min(
 893                         node_min.X + sidelen * x0,
 894                         node_min.Z + sidelen * z0
 895                 );
 896                 // Maximum edge of part of division
 897                 v2s16 p2d_max(
 898                         node_min.X + sidelen + sidelen * x0 - 1,
 899                         node_min.Z + sidelen + sidelen * z0 - 1
 900                 );
 901
 902                 // Get biome at center position of part of division
 903                 BiomeV6Type bt = getBiome(p2d_center);
 904
 905                 // Amount of trees
 906                 u32 tree_count;
 907                 if (bt == BT_JUNGLE || bt == BT_TAIGA || bt == BT_NORMAL) {
 908                         tree_count = area * getTreeAmount(p2d_center);
 909                         if (bt == BT_JUNGLE)
 910                                 tree_count *= 4;
 911                 } else {
 912                         tree_count = 0;
 913                 }
 914
 915                 // Add jungle grass
 916                 if (bt == BT_JUNGLE) {
 917                         float humidity = getHumidity(p2d_center);
 918                         u32 grass_count = 5 * humidity * tree_count;
 919                         for (u32 i = 0; i < grass_count; i++) {
 920                                 s16 x = grassrandom.range(p2d_min.X, p2d_max.X);
 921                                 s16 z = grassrandom.range(p2d_min.Y, p2d_max.Y);
 922                                 int mapindex = central_area_size.X * (z - node_min.Z)
 923                                                                 + (x - node_min.X);
 924                                 s16 y = heightmap[mapindex];
 925                                 if (y < water_level)
 926                                         continue;
 927
 928                                 u32 vi = vm->m_area.index(x, y, z);
 929                                 // place on dirt_with_grass, since we know it is exposed to sunlight
 930                                 if (vm->m_data[vi].getContent() == c_dirt_with_grass) {
 931                                         vm->m_area.add_y(em, vi, 1);
 932                                         vm->m_data[vi] = n_junglegrass;
 933                                 }
 934                         }
 935                 }
 936
 937                 // Put trees in random places on part of division
 938                 for (u32 i = 0; i < tree_count; i++) {
 939                         s16 x = myrand_range(p2d_min.X, p2d_max.X);
 940                         s16 z = myrand_range(p2d_min.Y, p2d_max.Y);
 941                         int mapindex = central_area_size.X * (z - node_min.Z)
 942                                                         + (x - node_min.X);
 943                         s16 y = heightmap[mapindex];
 944                         // Don't make a tree under water level
 945                         // Don't make a tree so high that it doesn't fit
 946                         if (y < water_level || y > node_max.Y - 6)
 947                                 continue;
 948
 949                         v3s16 p(x, y, z);
 950                         // Trees grow only on mud and grass and snowblock
 951                         {
 952                                 u32 i = vm->m_area.index(p);
 953                                 content_t c = vm->m_data[i].getContent();
 954                                 if (c != c_dirt &&
 955                                                 c != c_dirt_with_grass &&
 956                                                 c != c_dirt_with_snow &&
 957                                                 c != c_snowblock)
 958                                         continue;
 959                         }
 960                         p.Y++;
 961
 962                         // Make a tree
 963                         if (bt == BT_JUNGLE) {
 964                                 treegen::make_jungletree(*vm, p, ndef, myrand());
 965                         } else if (bt == BT_TAIGA) {
 966                                 treegen::make_pine_tree(*vm, p - v3s16(0, 1, 0), ndef, myrand());
 967                         } else if (bt == BT_NORMAL) {
 968                                 bool is_apple_tree = (myrand_range(0, 3) == 0) &&
 969                                                         getHaveAppleTree(v2s16(x, z));
 970                                 treegen::make_tree(*vm, p, is_apple_tree, ndef, myrand());
 971                         }
 972                 }
 973         }
 974         //printf("placeTreesAndJungleGrass: %dms\n", t.stop());
 975 }
 976
 977
 978 void MapgenV6::growGrass() // Add surface nodes
 979 {
 980         MapNode n_dirt_with_grass(c_dirt_with_grass);
 981         MapNode n_dirt_with_snow(c_dirt_with_snow);
 982         MapNode n_snowblock(c_snowblock);
 983         MapNode n_snow(c_snow);
 984         v3s16 em = vm->m_area.getExtent();
 985
 986         u32 index = 0;
 987         for (s16 z = full_node_min.Z; z <= full_node_max.Z; z++)
 988         for (s16 x = full_node_min.X; x <= full_node_max.X; x++, index++) {
 989                 // Find the lowest surface to which enough light ends up to make
 990                 // grass grow.  Basically just wait until not air and not leaves.
 991                 s16 surface_y = 0;
 992                 {
 993                         u32 i = vm->m_area.index(x, node_max.Y, z);
 994                         s16 y;
 995                         // Go to ground level
 996                         for (y = node_max.Y; y >= full_node_min.Y; y--) {
 997                                 MapNode &n = vm->m_data[i];
 998                                 if (ndef->get(n).param_type != CPT_LIGHT ||
 999                                                 ndef->get(n).liquid_type != LIQUID_NONE ||
1000                                                 n.getContent() == c_ice)
1001                                         break;
1002                                 vm->m_area.add_y(em, i, -1);
1003                         }
1004                         surface_y = (y >= full_node_min.Y) ? y : full_node_min.Y;
1005                 }
1006
1007                 BiomeV6Type bt = getBiome(index, v2s16(x, z));
1008                 u32 i = vm->m_area.index(x, surface_y, z);
1009                 content_t c = vm->m_data[i].getContent();
1010                 if (surface_y >= water_level - 20) {
1011                         if (bt == BT_TAIGA && c == c_dirt) {
1012                                 vm->m_data[i] = n_snowblock;
1013                                 vm->m_area.add_y(em, i, -1);
1014                                 vm->m_data[i] = n_dirt_with_snow;
1015                         } else if (bt == BT_TUNDRA) {
1016                                 if (c == c_dirt) {
1017                                         vm->m_data[i] = n_dirt_with_snow;
1018                                 } else if (c == c_stone && surface_y < node_max.Y) {
1019                                         vm->m_area.add_y(em, i, 1);
1020                                         vm->m_data[i] = n_snow;
1021                                 }
1022                         } else if (c == c_dirt) {
1023                                 vm->m_data[i] = n_dirt_with_grass;
1024                         }
1025                 }
1026         }
1027 }
1028
1029
1030 void MapgenV6::generateCaves(int max_stone_y)
1031 {
1032         float cave_amount = NoisePerlin2D(np_cave, node_min.X, node_min.Y, seed);
1033         int volume_nodes = (node_max.X - node_min.X + 1) *
1034                                            (node_max.Y - node_min.Y + 1) * MAP_BLOCKSIZE;
1035         cave_amount = MYMAX(0.0, cave_amount);
1036         u32 caves_count = cave_amount * volume_nodes / 50000;
1037         u32 bruises_count = 1;
1038         PseudoRandom ps(blockseed + 21343);
1039         PseudoRandom ps2(blockseed + 1032);
1040
1041         if (ps.range(1, 6) == 1)
1042                 bruises_count = ps.range(0, ps.range(0, 2));
1043
1044         if (getBiome(v2s16(node_min.X, node_min.Z)) == BT_DESERT) {
1045                 caves_count   /= 3;
1046                 bruises_count /= 3;
1047         }
1048
1049         for (u32 i = 0; i < caves_count + bruises_count; i++) {
1050                 bool large_cave = (i >= caves_count);
1051                 CaveV6 cave(this, &ps, &ps2, large_cave);
1052
1053                 cave.makeCave(node_min, node_max, max_stone_y);
1054         }
1055 }