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 #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 "voxelalgorithms.h"
  30 //#include "profiler.h" // For TimeTaker
  31 #include "settings.h" // For g_settings
  32 #include "emerge.h"
  33 #include "dungeongen.h"
  34 #include "cavegen.h"
  35 #include "treegen.h"
  36 #include "mg_ore.h"
  37 #include "mg_decoration.h"
  38 #include "mapgen_v6.h"
  39
  40 FlagDesc flagdesc_mapgen_v6[] = {
  41         {"jungles",    MGV6_JUNGLES},
  42         {"biomeblend", MGV6_BIOMEBLEND},
  43         {"mudflow",    MGV6_MUDFLOW},
  44         {"snowbiomes", MGV6_SNOWBIOMES},
  45         {"flat",       MGV6_FLAT},
  46         {"trees",      MGV6_TREES},
  47         {NULL,         0}
  48 };
  49
  50 ///////////////////////////////////////////////////////////////////////////////
  51
  52
  53 MapgenV6::MapgenV6(int mapgenid, MapgenParams *params, EmergeManager *emerge)
  54         : Mapgen(mapgenid, params, emerge)
  55 {
  56         this->m_emerge = emerge;
  57         this->ystride = csize.X; //////fix this
  58
  59         this->heightmap = new s16[csize.X * csize.Z];
  60
  61         MapgenV6Params *sp = (MapgenV6Params *)params->sparams;
  62         this->spflags     = sp->spflags;
  63         this->freq_desert = sp->freq_desert;
  64         this->freq_beach  = sp->freq_beach;
  65
  66         np_cave        = &sp->np_cave;
  67         np_humidity    = &sp->np_humidity;
  68         np_trees       = &sp->np_trees;
  69         np_apple_trees = &sp->np_apple_trees;
  70
  71         //// Create noise objects
  72         noise_terrain_base   = new Noise(&sp->np_terrain_base,   seed, csize.X, csize.Y);
  73         noise_terrain_higher = new Noise(&sp->np_terrain_higher, seed, csize.X, csize.Y);
  74         noise_steepness      = new Noise(&sp->np_steepness,      seed, csize.X, csize.Y);
  75         noise_height_select  = new Noise(&sp->np_height_select,  seed, csize.X, csize.Y);
  76         noise_mud            = new Noise(&sp->np_mud,            seed, csize.X, csize.Y);
  77         noise_beach          = new Noise(&sp->np_beach,          seed, csize.X, csize.Y);
  78         noise_biome          = new Noise(&sp->np_biome,          seed,
  79                         csize.X + 2 * MAP_BLOCKSIZE, csize.Y + 2 * MAP_BLOCKSIZE);
  80         noise_humidity       = new Noise(&sp->np_humidity,       seed,
  81                         csize.X + 2 * MAP_BLOCKSIZE, csize.Y + 2 * MAP_BLOCKSIZE);
  82
  83         //// Resolve nodes to be used
  84         INodeDefManager *ndef = emerge->ndef;
  85
  86         c_stone           = ndef->getId("mapgen_stone");
  87         c_dirt            = ndef->getId("mapgen_dirt");
  88         c_dirt_with_grass = ndef->getId("mapgen_dirt_with_grass");
  89         c_sand            = ndef->getId("mapgen_sand");
  90         c_water_source    = ndef->getId("mapgen_water_source");
  91         c_lava_source     = ndef->getId("mapgen_lava_source");
  92         c_gravel          = ndef->getId("mapgen_gravel");
  93         c_desert_stone    = ndef->getId("mapgen_desert_stone");
  94         c_desert_sand     = ndef->getId("mapgen_desert_sand");
  95         c_dirt_with_snow  = ndef->getId("mapgen_dirt_with_snow");
  96         c_snow            = ndef->getId("mapgen_snow");
  97         c_snowblock       = ndef->getId("mapgen_snowblock");
  98         c_ice             = ndef->getId("mapgen_ice");
  99
 100         c_cobble          = ndef->getId("mapgen_cobble");
 101         c_stair_cobble    = ndef->getId("mapgen_stair_cobble");
 102         c_mossycobble     = ndef->getId("mapgen_mossycobble");
 103
 104         if (c_desert_sand == CONTENT_IGNORE)
 105                 c_desert_sand = c_sand;
 106         if (c_desert_stone == CONTENT_IGNORE)
 107                 c_desert_stone = c_stone;
 108         if (c_mossycobble == CONTENT_IGNORE)
 109                 c_mossycobble = c_cobble;
 110         if (c_stair_cobble == CONTENT_IGNORE)
 111                 c_stair_cobble = c_cobble;
 112         if (c_dirt_with_snow == CONTENT_IGNORE)
 113                 c_dirt_with_snow = c_dirt_with_grass;
 114         if (c_snow == CONTENT_IGNORE)
 115                 c_snow = CONTENT_AIR;
 116         if (c_snowblock == CONTENT_IGNORE)
 117                 c_snowblock = c_dirt_with_grass;
 118         if (c_ice == CONTENT_IGNORE)
 119                 c_ice = c_water_source;
 120 }
 121
 122
 123 MapgenV6::~MapgenV6()
 124 {
 125         delete noise_terrain_base;
 126         delete noise_terrain_higher;
 127         delete noise_steepness;
 128         delete noise_height_select;
 129         delete noise_mud;
 130         delete noise_beach;
 131         delete noise_biome;
 132         delete noise_humidity;
 133
 134         delete[] heightmap;
 135 }
 136
 137
 138 MapgenV6Params::MapgenV6Params()
 139 {
 140         spflags     = MGV6_BIOMEBLEND | MGV6_MUDFLOW;
 141         freq_desert = 0.45;
 142         freq_beach  = 0.15;
 143
 144         np_terrain_base   = NoiseParams(-4,   20.0, v3f(250.0, 250.0, 250.0), 82341,  5, 0.6,  2.0);
 145         np_terrain_higher = NoiseParams(20,   16.0, v3f(500.0, 500.0, 500.0), 85039,  5, 0.6,  2.0);
 146         np_steepness      = NoiseParams(0.85, 0.5,  v3f(125.0, 125.0, 125.0), -932,   5, 0.7,  2.0);
 147         np_height_select  = NoiseParams(0,    1.0,  v3f(250.0, 250.0, 250.0), 4213,   5, 0.69, 2.0);
 148         np_mud            = NoiseParams(4,    2.0,  v3f(200.0, 200.0, 200.0), 91013,  3, 0.55, 2.0);
 149         np_beach          = NoiseParams(0,    1.0,  v3f(250.0, 250.0, 250.0), 59420,  3, 0.50, 2.0);
 150         np_biome          = NoiseParams(0,    1.0,  v3f(500.0, 500.0, 500.0), 9130,   3, 0.50, 2.0);
 151         np_cave           = NoiseParams(6,    6.0,  v3f(250.0, 250.0, 250.0), 34329,  3, 0.50, 2.0);
 152         np_humidity       = NoiseParams(0.5,  0.5,  v3f(500.0, 500.0, 500.0), 72384,  3, 0.50, 2.0);
 153         np_trees          = NoiseParams(0,    1.0,  v3f(125.0, 125.0, 125.0), 2,      4, 0.66, 2.0);
 154         np_apple_trees    = NoiseParams(0,    1.0,  v3f(100.0, 100.0, 100.0), 342902, 3, 0.45, 2.0);
 155 }
 156
 157
 158 void MapgenV6Params::readParams(const Settings *settings)
 159 {
 160         settings->getFlagStrNoEx("mgv6_spflags", spflags, flagdesc_mapgen_v6);
 161         settings->getFloatNoEx("mgv6_freq_desert", freq_desert);
 162         settings->getFloatNoEx("mgv6_freq_beach",  freq_beach);
 163
 164         settings->getNoiseParams("mgv6_np_terrain_base",   np_terrain_base);
 165         settings->getNoiseParams("mgv6_np_terrain_higher", np_terrain_higher);
 166         settings->getNoiseParams("mgv6_np_steepness",      np_steepness);
 167         settings->getNoiseParams("mgv6_np_height_select",  np_height_select);
 168         settings->getNoiseParams("mgv6_np_mud",            np_mud);
 169         settings->getNoiseParams("mgv6_np_beach",          np_beach);
 170         settings->getNoiseParams("mgv6_np_biome",          np_biome);
 171         settings->getNoiseParams("mgv6_np_cave",           np_cave);
 172         settings->getNoiseParams("mgv6_np_humidity",       np_humidity);
 173         settings->getNoiseParams("mgv6_np_trees",          np_trees);
 174         settings->getNoiseParams("mgv6_np_apple_trees",    np_apple_trees);
 175 }
 176
 177
 178 void MapgenV6Params::writeParams(Settings *settings) const
 179 {
 180         settings->setFlagStr("mgv6_spflags", spflags, flagdesc_mapgen_v6, U32_MAX);
 181         settings->setFloat("mgv6_freq_desert", freq_desert);
 182         settings->setFloat("mgv6_freq_beach",  freq_beach);
 183
 184         settings->setNoiseParams("mgv6_np_terrain_base",   np_terrain_base);
 185         settings->setNoiseParams("mgv6_np_terrain_higher", np_terrain_higher);
 186         settings->setNoiseParams("mgv6_np_steepness",      np_steepness);
 187         settings->setNoiseParams("mgv6_np_height_select",  np_height_select);
 188         settings->setNoiseParams("mgv6_np_mud",            np_mud);
 189         settings->setNoiseParams("mgv6_np_beach",          np_beach);
 190         settings->setNoiseParams("mgv6_np_biome",          np_biome);
 191         settings->setNoiseParams("mgv6_np_cave",           np_cave);
 192         settings->setNoiseParams("mgv6_np_humidity",       np_humidity);
 193         settings->setNoiseParams("mgv6_np_trees",          np_trees);
 194         settings->setNoiseParams("mgv6_np_apple_trees",    np_apple_trees);
 195 }
 196
 197
 198 //////////////////////// Some helper functions for the map generator
 199
 200
 201 // Returns Y one under area minimum if not found
 202 s16 MapgenV6::find_stone_level(v2s16 p2d)
 203 {
 204         v3s16 em = vm->m_area.getExtent();
 205         s16 y_nodes_max = vm->m_area.MaxEdge.Y;
 206         s16 y_nodes_min = vm->m_area.MinEdge.Y;
 207         u32 i = vm->m_area.index(p2d.X, y_nodes_max, p2d.Y);
 208         s16 y;
 209
 210         for (y = y_nodes_max; y >= y_nodes_min; y--) {
 211                 content_t c = vm->m_data[i].getContent();
 212                 if (c != CONTENT_IGNORE && (c == c_stone || c == c_desert_stone))
 213                         break;
 214
 215                 vm->m_area.add_y(em, i, -1);
 216         }
 217         return (y >= y_nodes_min) ? y : y_nodes_min - 1;
 218 }
 219
 220
 221 // Required by mapgen.h
 222 bool MapgenV6::block_is_underground(u64 seed, v3s16 blockpos)
 223 {
 224         /*s16 minimum_groundlevel = (s16)get_sector_minimum_ground_level(
 225                         seed, v2s16(blockpos.X, blockpos.Z));*/
 226         // Nah, this is just a heuristic, just return something
 227         s16 minimum_groundlevel = water_level;
 228
 229         if(blockpos.Y * MAP_BLOCKSIZE + MAP_BLOCKSIZE <= minimum_groundlevel)
 230                 return true;
 231         else
 232                 return false;
 233 }
 234
 235
 236 //////////////////////// Base terrain height functions
 237
 238 float MapgenV6::baseTerrainLevel(float terrain_base, float terrain_higher,
 239         float steepness, float height_select)
 240 {
 241         float base   = 1 + terrain_base;
 242         float higher = 1 + terrain_higher;
 243
 244         // Limit higher ground level to at least base
 245         if(higher < base)
 246                 higher = base;
 247
 248         // Steepness factor of cliffs
 249         float b = steepness;
 250         b = rangelim(b, 0.0, 1000.0);
 251         b = 5 * b * b * b * b * b * b * b;
 252         b = rangelim(b, 0.5, 1000.0);
 253
 254         // Values 1.5...100 give quite horrible looking slopes
 255         if (b > 1.5 && b < 100.0)
 256                 b = (b < 10.0) ? 1.5 : 100.0;
 257
 258         float a_off = -0.20; // Offset to more low
 259         float a = 0.5 + b * (a_off + height_select);
 260         a = rangelim(a, 0.0, 1.0); // Limit
 261
 262         return base * (1.0 - a) + higher * a;
 263 }
 264
 265
 266 float MapgenV6::baseTerrainLevelFromNoise(v2s16 p)
 267 {
 268         if ((spflags & MGV6_FLAT) || (flags & MG_FLAT))
 269                 return water_level;
 270
 271         float terrain_base   = NoisePerlin2D_PO(&noise_terrain_base->np,
 272                                                         p.X, 0.5, p.Y, 0.5, seed);
 273         float terrain_higher = NoisePerlin2D_PO(&noise_terrain_higher->np,
 274                                                         p.X, 0.5, p.Y, 0.5, seed);
 275         float steepness      = NoisePerlin2D_PO(&noise_steepness->np,
 276                                                         p.X, 0.5, p.Y, 0.5, seed);
 277         float height_select  = NoisePerlin2D_PO(&noise_height_select->np,
 278                                                         p.X, 0.5, p.Y, 0.5, seed);
 279
 280         return baseTerrainLevel(terrain_base, terrain_higher,
 281                                                         steepness, height_select);
 282 }
 283
 284
 285 float MapgenV6::baseTerrainLevelFromMap(v2s16 p)
 286 {
 287         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 288         return baseTerrainLevelFromMap(index);
 289 }
 290
 291
 292 float MapgenV6::baseTerrainLevelFromMap(int index)
 293 {
 294         if ((spflags & MGV6_FLAT) || (flags & MG_FLAT))
 295                 return water_level;
 296
 297         float terrain_base   = noise_terrain_base->result[index];
 298         float terrain_higher = noise_terrain_higher->result[index];
 299         float steepness      = noise_steepness->result[index];
 300         float height_select  = noise_height_select->result[index];
 301
 302         return baseTerrainLevel(terrain_base, terrain_higher,
 303                                                         steepness, height_select);
 304 }
 305
 306
 307 s16 MapgenV6::find_ground_level_from_noise(u64 seed, v2s16 p2d, s16 precision)
 308 {
 309         return baseTerrainLevelFromNoise(p2d) + MGV6_AVERAGE_MUD_AMOUNT;
 310 }
 311
 312
 313 int MapgenV6::getGroundLevelAtPoint(v2s16 p)
 314 {
 315         return baseTerrainLevelFromNoise(p) + MGV6_AVERAGE_MUD_AMOUNT;
 316 }
 317
 318
 319 //////////////////////// Noise functions
 320
 321 float MapgenV6::getMudAmount(v2s16 p)
 322 {
 323         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 324         return getMudAmount(index);
 325 }
 326
 327
 328 bool MapgenV6::getHaveBeach(v2s16 p)
 329 {
 330         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 331         return getHaveBeach(index);
 332 }
 333
 334
 335 BiomeV6Type MapgenV6::getBiome(v2s16 p)
 336 {
 337         int index = (p.Y - full_node_min.Z) * (ystride + 2 * MAP_BLOCKSIZE)
 338                         + (p.X - full_node_min.X);
 339         return getBiome(index, p);
 340 }
 341
 342
 343 float MapgenV6::getHumidity(v2s16 p)
 344 {
 345         /*double noise = noise2d_perlin(
 346                 0.5+(float)p.X/500, 0.5+(float)p.Y/500,
 347                 seed+72384, 4, 0.66);
 348         noise = (noise + 1.0)/2.0;*/
 349
 350         int index = (p.Y - full_node_min.Z) * (ystride + 2 * MAP_BLOCKSIZE)
 351                         + (p.X - full_node_min.X);
 352         float noise = noise_humidity->result[index];
 353
 354         if (noise < 0.0)
 355                 noise = 0.0;
 356         if (noise > 1.0)
 357                 noise = 1.0;
 358         return noise;
 359 }
 360
 361
 362 float MapgenV6::getTreeAmount(v2s16 p)
 363 {
 364         /*double noise = noise2d_perlin(
 365                         0.5+(float)p.X/125, 0.5+(float)p.Y/125,
 366                         seed+2, 4, 0.66);*/
 367
 368         float noise = NoisePerlin2D(np_trees, p.X, p.Y, seed);
 369         float zeroval = -0.39;
 370         if (noise < zeroval)
 371                 return 0;
 372         else
 373                 return 0.04 * (noise - zeroval) / (1.0 - zeroval);
 374 }
 375
 376
 377 bool MapgenV6::getHaveAppleTree(v2s16 p)
 378 {
 379         /*is_apple_tree = noise2d_perlin(
 380                 0.5+(float)p.X/100, 0.5+(float)p.Z/100,
 381                 data->seed+342902, 3, 0.45) > 0.2;*/
 382
 383         float noise = NoisePerlin2D(np_apple_trees, p.X, p.Y, seed);
 384
 385         return noise > 0.2;
 386 }
 387
 388
 389 float MapgenV6::getMudAmount(int index)
 390 {
 391         if ((spflags & MGV6_FLAT) || (flags & MG_FLAT))
 392                 return MGV6_AVERAGE_MUD_AMOUNT;
 393
 394         /*return ((float)AVERAGE_MUD_AMOUNT + 2.0 * noise2d_perlin(
 395                         0.5+(float)p.X/200, 0.5+(float)p.Y/200,
 396                         seed+91013, 3, 0.55));*/
 397
 398         return noise_mud->result[index];
 399 }
 400
 401
 402 bool MapgenV6::getHaveBeach(int index)
 403 {
 404         // Determine whether to have sand here
 405         /*double sandnoise = noise2d_perlin(
 406                         0.2+(float)p2d.X/250, 0.7+(float)p2d.Y/250,
 407                         seed+59420, 3, 0.50);*/
 408
 409         float sandnoise = noise_beach->result[index];
 410         return (sandnoise > freq_beach);
 411 }
 412
 413
 414 BiomeV6Type MapgenV6::getBiome(int index, v2s16 p)
 415 {
 416         // Just do something very simple as for now
 417         /*double d = noise2d_perlin(
 418                         0.6+(float)p2d.X/250, 0.2+(float)p2d.Y/250,
 419                         seed+9130, 3, 0.50);*/
 420
 421         float d = noise_biome->result[index];
 422         float h = noise_humidity->result[index];
 423
 424         if (spflags & MGV6_SNOWBIOMES) {
 425                 float blend = (spflags & MGV6_BIOMEBLEND) ? noise2d(p.X, p.Y, seed) / 40 : 0;
 426
 427                 if (d > MGV6_FREQ_HOT + blend) {
 428                         if (h > MGV6_FREQ_JUNGLE + blend)
 429                                 return BT_JUNGLE;
 430                         else
 431                                 return BT_DESERT;
 432                 } else if (d < MGV6_FREQ_SNOW + blend) {
 433                         if (h > MGV6_FREQ_TAIGA + blend)
 434                                 return BT_TAIGA;
 435                         else
 436                                 return BT_TUNDRA;
 437                 } else {
 438                         return BT_NORMAL;
 439                 }
 440         } else {
 441                 if (d > freq_desert)
 442                         return BT_DESERT;
 443
 444                 if ((spflags & MGV6_BIOMEBLEND) && (d > freq_desert - 0.10) &&
 445                                 ((noise2d(p.X, p.Y, seed) + 1.0) > (freq_desert - d) * 20.0))
 446                         return BT_DESERT;
 447
 448                 if ((spflags & MGV6_JUNGLES) && h > 0.75)
 449                         return BT_JUNGLE;
 450                 else
 451                         return BT_NORMAL;
 452         }
 453 }
 454
 455
 456 u32 MapgenV6::get_blockseed(u64 seed, v3s16 p)
 457 {
 458         s32 x = p.X, y = p.Y, z = p.Z;
 459         return (u32)(seed % 0x100000000ULL) + z * 38134234 + y * 42123 + x * 23;
 460 }
 461
 462
 463 //////////////////////// Map generator
 464
 465 void MapgenV6::makeChunk(BlockMakeData *data)
 466 {
 467         // Pre-conditions
 468         assert(data->vmanip);
 469         assert(data->nodedef);
 470         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 471                    data->blockpos_requested.Y >= data->blockpos_min.Y &&
 472                    data->blockpos_requested.Z >= data->blockpos_min.Z);
 473         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 474                    data->blockpos_requested.Y <= data->blockpos_max.Y &&
 475                    data->blockpos_requested.Z <= data->blockpos_max.Z);
 476
 477         this->generating = true;
 478         this->vm   = data->vmanip;
 479         this->ndef = data->nodedef;
 480
 481         // Hack: use minimum block coords for old code that assumes a single block
 482         v3s16 blockpos_min = data->blockpos_min;
 483         v3s16 blockpos_max = data->blockpos_max;
 484
 485         // Area of central chunk
 486         node_min = blockpos_min * MAP_BLOCKSIZE;
 487         node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 488
 489         // Full allocated area
 490         full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
 491         full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 492
 493         central_area_size = node_max - node_min + v3s16(1, 1, 1);
 494         assert(central_area_size.X == central_area_size.Z);
 495
 496         int volume_blocks = (blockpos_max.X - blockpos_min.X + 1)
 497                                           * (blockpos_max.Y - blockpos_min.Y + 1)
 498                                           * (blockpos_max.Z - blockpos_max.Z + 1);
 499
 500         volume_nodes = volume_blocks *
 501                 MAP_BLOCKSIZE * MAP_BLOCKSIZE * MAP_BLOCKSIZE;
 502
 503         // Create a block-specific seed
 504         blockseed = get_blockseed(data->seed, full_node_min);
 505
 506         // Make some noise
 507         calculateNoise();
 508
 509         // Maximum height of the stone surface and obstacles.
 510         // This is used to guide the cave generation
 511         s16 stone_surface_max_y;
 512
 513         // Generate general ground level to full area
 514         stone_surface_max_y = generateGround();
 515
 516         // Create initial heightmap to limit caves
 517         updateHeightmap(node_min, node_max);
 518
 519         const s16 max_spread_amount = MAP_BLOCKSIZE;
 520         // Limit dirt flow area by 1 because mud is flown into neighbors.
 521         s16 mudflow_minpos = -max_spread_amount + 1;
 522         s16 mudflow_maxpos = central_area_size.X + max_spread_amount - 2;
 523
 524         // Loop this part, it will make stuff look older and newer nicely
 525         const u32 age_loops = 2;
 526         for (u32 i_age = 0; i_age < age_loops; i_age++) { // Aging loop
 527                 // Make caves (this code is relatively horrible)
 528                 if (flags & MG_CAVES)
 529                         generateCaves(stone_surface_max_y);
 530
 531                 // Add mud to the central chunk
 532                 addMud();
 533
 534                 // Flow mud away from steep edges
 535                 if (spflags & MGV6_MUDFLOW)
 536                         flowMud(mudflow_minpos, mudflow_maxpos);
 537
 538         }
 539
 540         // Update heightmap after mudflow
 541         updateHeightmap(node_min, node_max);
 542
 543         // Add dungeons
 544         if ((flags & MG_DUNGEONS) && (stone_surface_max_y >= node_min.Y)) {
 545                 DungeonParams dp;
 546
 547                 dp.np_rarity  = nparams_dungeon_rarity;
 548                 dp.np_density = nparams_dungeon_density;
 549                 dp.np_wetness = nparams_dungeon_wetness;
 550                 dp.c_water    = c_water_source;
 551                 if (getBiome(0, v2s16(node_min.X, node_min.Z)) == BT_DESERT) {
 552                         dp.c_cobble = c_desert_stone;
 553                         dp.c_moss   = c_desert_stone;
 554                         dp.c_stair  = c_desert_stone;
 555
 556                         dp.diagonal_dirs = true;
 557                         dp.mossratio     = 0.0;
 558                         dp.holesize      = v3s16(2, 3, 2);
 559                         dp.roomsize      = v3s16(2, 5, 2);
 560                         dp.notifytype    = GENNOTIFY_TEMPLE;
 561                 } else {
 562                         dp.c_cobble = c_cobble;
 563                         dp.c_moss   = c_mossycobble;
 564                         dp.c_stair  = c_stair_cobble;
 565
 566                         dp.diagonal_dirs = false;
 567                         dp.mossratio     = 3.0;
 568                         dp.holesize      = v3s16(1, 2, 1);
 569                         dp.roomsize      = v3s16(0, 0, 0);
 570                         dp.notifytype    = GENNOTIFY_DUNGEON;
 571                 }
 572
 573                 DungeonGen dgen(this, &dp);
 574                 dgen.generate(blockseed, full_node_min, full_node_max);
 575         }
 576
 577         // Add top and bottom side of water to transforming_liquid queue
 578         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 579
 580         // Add surface nodes
 581         growGrass();
 582
 583         // Generate some trees, and add grass, if a jungle
 584         if ((spflags & MGV6_TREES) || (flags & MG_TREES))
 585                 placeTreesAndJungleGrass();
 586
 587         // Generate the registered decorations
 588         if (flags & MG_DECORATIONS)
 589                 m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
 590
 591         // Generate the registered ores
 592         m_emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
 593
 594         // Calculate lighting
 595         if (flags & MG_LIGHT)
 596                 calcLighting(node_min - v3s16(1, 1, 1) * MAP_BLOCKSIZE,
 597                         node_max + v3s16(1, 0, 1) * MAP_BLOCKSIZE,
 598                         full_node_min, full_node_max);
 599
 600         this->generating = false;
 601 }
 602
 603
 604 void MapgenV6::calculateNoise()
 605 {
 606         int x = node_min.X;
 607         int z = node_min.Z;
 608         int fx = full_node_min.X;
 609         int fz = full_node_min.Z;
 610
 611         if (!((spflags & MGV6_FLAT) || (flags & MG_FLAT))) {
 612                 noise_terrain_base->perlinMap2D_PO(x, 0.5, z, 0.5);
 613                 noise_terrain_higher->perlinMap2D_PO(x, 0.5, z, 0.5);
 614                 noise_steepness->perlinMap2D_PO(x, 0.5, z, 0.5);
 615                 noise_height_select->perlinMap2D_PO(x, 0.5, z, 0.5);
 616                 noise_mud->perlinMap2D_PO(x, 0.5, z, 0.5);
 617         }
 618
 619         noise_beach->perlinMap2D_PO(x, 0.2, z, 0.7);
 620
 621         noise_biome->perlinMap2D_PO(fx, 0.6, fz, 0.2);
 622         noise_humidity->perlinMap2D_PO(fx, 0.0, fz, 0.0);
 623         // Humidity map does not need range limiting 0 to 1,
 624         // only humidity at point does
 625 }
 626
 627
 628 int MapgenV6::generateGround()
 629 {
 630         //TimeTaker timer1("Generating ground level");
 631         MapNode n_air(CONTENT_AIR), n_water_source(c_water_source);
 632         MapNode n_stone(c_stone), n_desert_stone(c_desert_stone);
 633         MapNode n_ice(c_ice);
 634         int stone_surface_max_y = -MAX_MAP_GENERATION_LIMIT;
 635
 636         u32 index = 0;
 637         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 638         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 639                 // Surface height
 640                 s16 surface_y = (s16)baseTerrainLevelFromMap(index);
 641
 642                 // Log it
 643                 if (surface_y > stone_surface_max_y)
 644                         stone_surface_max_y = surface_y;
 645
 646                 BiomeV6Type bt = getBiome(v2s16(x, z));
 647
 648                 // Fill ground with stone
 649                 v3s16 em = vm->m_area.getExtent();
 650                 u32 i = vm->m_area.index(x, node_min.Y, z);
 651                 for (s16 y = node_min.Y; y <= node_max.Y; y++) {
 652                         if (vm->m_data[i].getContent() == CONTENT_IGNORE) {
 653                                 if (y <= surface_y) {
 654                                         vm->m_data[i] = (y >= MGV6_DESERT_STONE_BASE
 655                                                         && bt == BT_DESERT) ?
 656                                                 n_desert_stone : n_stone;
 657                                 } else if (y <= water_level) {
 658                                         vm->m_data[i] = (y >= MGV6_ICE_BASE
 659                                                         && bt == BT_TUNDRA) ?
 660                                                 n_ice : n_water_source;
 661                                 } else {
 662                                         vm->m_data[i] = n_air;
 663                                 }
 664                         }
 665                         vm->m_area.add_y(em, i, 1);
 666                 }
 667         }
 668
 669         return stone_surface_max_y;
 670 }
 671
 672
 673 void MapgenV6::addMud()
 674 {
 675         // 15ms @cs=8
 676         //TimeTaker timer1("add mud");
 677         MapNode n_dirt(c_dirt), n_gravel(c_gravel);
 678         MapNode n_sand(c_sand), n_desert_sand(c_desert_sand);
 679         MapNode addnode;
 680
 681         u32 index = 0;
 682         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 683         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 684                 // Randomize mud amount
 685                 s16 mud_add_amount = getMudAmount(index) / 2.0 + 0.5;
 686
 687                 // Find ground level
 688                 s16 surface_y = find_stone_level(v2s16(x, z)); /////////////////optimize this!
 689
 690                 // Handle area not found
 691                 if (surface_y == vm->m_area.MinEdge.Y - 1)
 692                         continue;
 693
 694                 BiomeV6Type bt = getBiome(v2s16(x, z));
 695                 addnode = (bt == BT_DESERT) ? n_desert_sand : n_dirt;
 696
 697                 if (bt == BT_DESERT && surface_y + mud_add_amount <= water_level + 1) {
 698                         addnode = n_sand;
 699                 } else if (mud_add_amount <= 0) {
 700                         mud_add_amount = 1 - mud_add_amount;
 701                         addnode = n_gravel;
 702                 } else if (bt != BT_DESERT && getHaveBeach(index) &&
 703                                 surface_y + mud_add_amount <= water_level + 2) {
 704                         addnode = n_sand;
 705                 }
 706
 707                 if ((bt == BT_DESERT || bt == BT_TUNDRA) && surface_y > 20)
 708                         mud_add_amount = MYMAX(0, mud_add_amount - (surface_y - 20) / 5);
 709
 710                 /* If topmost node is grass, change it to mud.  It might be if it was
 711                 // flown to there from a neighboring chunk and then converted.
 712                 u32 i = vm->m_area.index(x, surface_y, z);
 713                 if (vm->m_data[i].getContent() == c_dirt_with_grass)
 714                         vm->m_data[i] = n_dirt;*/
 715
 716                 // Add mud on ground
 717                 s16 mudcount = 0;
 718                 v3s16 em = vm->m_area.getExtent();
 719                 s16 y_start = surface_y + 1;
 720                 u32 i = vm->m_area.index(x, y_start, z);
 721                 for (s16 y = y_start; y <= node_max.Y; y++) {
 722                         if (mudcount >= mud_add_amount)
 723                                 break;
 724
 725                         vm->m_data[i] = addnode;
 726                         mudcount++;
 727
 728                         vm->m_area.add_y(em, i, 1);
 729                 }
 730         }
 731 }
 732
 733
 734 void MapgenV6::flowMud(s16 &mudflow_minpos, s16 &mudflow_maxpos)
 735 {
 736         // 340ms @cs=8
 737         //TimeTaker timer1("flow mud");
 738
 739         // Iterate a few times
 740         for (s16 k = 0; k < 3; k++) {
 741                 for (s16 z = mudflow_minpos; z <= mudflow_maxpos; z++)
 742                 for (s16 x = mudflow_minpos; x <= mudflow_maxpos; x++) {
 743                         // Invert coordinates every 2nd iteration
 744                         if (k % 2 == 0) {
 745                                 x = mudflow_maxpos - (x - mudflow_minpos);
 746                                 z = mudflow_maxpos - (z - mudflow_minpos);
 747                         }
 748
 749                         // Node position in 2d
 750                         v2s16 p2d = v2s16(node_min.X, node_min.Z) + v2s16(x, z);
 751
 752                         v3s16 em = vm->m_area.getExtent();
 753                         u32 i = vm->m_area.index(p2d.X, node_max.Y, p2d.Y);
 754                         s16 y = node_max.Y;
 755
 756                         while (y >= node_min.Y) {
 757
 758                         for (;; y--) {
 759                                 MapNode *n = NULL;
 760                                 // Find mud
 761                                 for (; y >= node_min.Y; y--) {
 762                                         n = &vm->m_data[i];
 763                                         if (n->getContent() == c_dirt ||
 764                                                         n->getContent() == c_dirt_with_grass ||
 765                                                         n->getContent() == c_gravel)
 766                                                 break;
 767
 768                                         vm->m_area.add_y(em, i, -1);
 769                                 }
 770
 771                                 // Stop if out of area
 772                                 //if(vmanip.m_area.contains(i) == false)
 773                                 if (y < node_min.Y)
 774                                         break;
 775
 776                                 if (n->getContent() == c_dirt ||
 777                                                 n->getContent() == c_dirt_with_grass) {
 778                                         // Make it exactly mud
 779                                         n->setContent(c_dirt);
 780
 781                                         // Don't flow it if the stuff under it is not mud
 782                                         {
 783                                                 u32 i2 = i;
 784                                                 vm->m_area.add_y(em, i2, -1);
 785                                                 // Cancel if out of area
 786                                                 if (vm->m_area.contains(i2) == false)
 787                                                         continue;
 788                                                 MapNode *n2 = &vm->m_data[i2];
 789                                                 if (n2->getContent() != c_dirt &&
 790                                                                 n2->getContent() != c_dirt_with_grass)
 791                                                         continue;
 792                                         }
 793                                 }
 794
 795                                 v3s16 dirs4[4] = {
 796                                         v3s16(0, 0, 1), // back
 797                                         v3s16(1, 0, 0), // right
 798                                         v3s16(0, 0, -1), // front
 799                                         v3s16(-1, 0, 0), // left
 800                                 };
 801
 802                                 // Check that upper is air or doesn't exist.
 803                                 // Cancel dropping if upper keeps it in place
 804                                 u32 i3 = i;
 805                                 vm->m_area.add_y(em, i3, 1);
 806                                 if (vm->m_area.contains(i3) == true &&
 807                                                 ndef->get(vm->m_data[i3]).walkable)
 808                                         continue;
 809
 810                                 // Drop mud on side
 811                                 for(u32 di = 0; di < 4; di++) {
 812                                         v3s16 dirp = dirs4[di];
 813                                         u32 i2 = i;
 814                                         // Move to side
 815                                         vm->m_area.add_p(em, i2, dirp);
 816                                         // Fail if out of area
 817                                         if (vm->m_area.contains(i2) == false)
 818                                                 continue;
 819                                         // Check that side is air
 820                                         MapNode *n2 = &vm->m_data[i2];
 821                                         if (ndef->get(*n2).walkable)
 822                                                 continue;
 823                                         // Check that under side is air
 824                                         vm->m_area.add_y(em, i2, -1);
 825                                         if (vm->m_area.contains(i2) == false)
 826                                                 continue;
 827                                         n2 = &vm->m_data[i2];
 828                                         if (ndef->get(*n2).walkable)
 829                                                 continue;
 830                                         // Loop further down until not air
 831                                         bool dropped_to_unknown = false;
 832                                         do {
 833                                                 vm->m_area.add_y(em, i2, -1);
 834                                                 n2 = &vm->m_data[i2];
 835                                                 // if out of known area
 836                                                 if(vm->m_area.contains(i2) == false ||
 837                                                                 n2->getContent() == CONTENT_IGNORE) {
 838                                                         dropped_to_unknown = true;
 839                                                         break;
 840                                                 }
 841                                         } while (ndef->get(*n2).walkable == false);
 842                                         // Loop one up so that we're in air
 843                                         vm->m_area.add_y(em, i2, 1);
 844                                         n2 = &vm->m_data[i2];
 845
 846                                         bool old_is_water = (n->getContent() == c_water_source);
 847                                         // Move mud to new place
 848                                         if (!dropped_to_unknown) {
 849                                                 *n2 = *n;
 850                                                 // Set old place to be air (or water)
 851                                                 if(old_is_water)
 852                                                         *n = MapNode(c_water_source);
 853                                                 else
 854                                                         *n = MapNode(CONTENT_AIR);
 855                                         }
 856
 857                                         // Done
 858                                         break;
 859                                 }
 860                         }
 861                         }
 862                 }
 863         }
 864 }
 865
 866
 867 void MapgenV6::placeTreesAndJungleGrass()
 868 {
 869         //TimeTaker t("placeTrees");
 870         if (node_max.Y < water_level)
 871                 return;
 872
 873         PseudoRandom grassrandom(blockseed + 53);
 874         content_t c_junglegrass = ndef->getId("mapgen_junglegrass");
 875         // if we don't have junglegrass, don't place cignore... that's bad
 876         if (c_junglegrass == CONTENT_IGNORE)
 877                 c_junglegrass = CONTENT_AIR;
 878         MapNode n_junglegrass(c_junglegrass);
 879         v3s16 em = vm->m_area.getExtent();
 880
 881         // Divide area into parts
 882         s16 div = 8;
 883         s16 sidelen = central_area_size.X / div;
 884         double area = sidelen * sidelen;
 885
 886         // N.B.  We must add jungle grass first, since tree leaves will
 887         // obstruct the ground, giving us a false ground level
 888         for (s16 z0 = 0; z0 < div; z0++)
 889         for (s16 x0 = 0; x0 < div; x0++) {
 890                 // Center position of part of division
 891                 v2s16 p2d_center(
 892                         node_min.X + sidelen / 2 + sidelen * x0,
 893                         node_min.Z + sidelen / 2 + sidelen * z0
 894                 );
 895                 // Minimum edge of part of division
 896                 v2s16 p2d_min(
 897                         node_min.X + sidelen * x0,
 898                         node_min.Z + sidelen * z0
 899                 );
 900                 // Maximum edge of part of division
 901                 v2s16 p2d_max(
 902                         node_min.X + sidelen + sidelen * x0 - 1,
 903                         node_min.Z + sidelen + sidelen * z0 - 1
 904                 );
 905
 906                 // Get biome at center position of part of division
 907                 BiomeV6Type bt = getBiome(p2d_center);
 908
 909                 // Amount of trees
 910                 u32 tree_count;
 911                 if (bt == BT_JUNGLE || bt == BT_TAIGA || bt == BT_NORMAL) {
 912                         tree_count = area * getTreeAmount(p2d_center);
 913                         if (bt == BT_JUNGLE)
 914                                 tree_count *= 4;
 915                 } else {
 916                         tree_count = 0;
 917                 }
 918
 919                 // Add jungle grass
 920                 if (bt == BT_JUNGLE) {
 921                         float humidity = getHumidity(p2d_center);
 922                         u32 grass_count = 5 * humidity * tree_count;
 923                         for (u32 i = 0; i < grass_count; i++) {
 924                                 s16 x = grassrandom.range(p2d_min.X, p2d_max.X);
 925                                 s16 z = grassrandom.range(p2d_min.Y, p2d_max.Y);
 926                                 int mapindex = central_area_size.X * (z - node_min.Z)
 927                                                                 + (x - node_min.X);
 928                                 s16 y = heightmap[mapindex];
 929                                 if (y < water_level)
 930                                         continue;
 931
 932                                 u32 vi = vm->m_area.index(x, y, z);
 933                                 // place on dirt_with_grass, since we know it is exposed to sunlight
 934                                 if (vm->m_data[vi].getContent() == c_dirt_with_grass) {
 935                                         vm->m_area.add_y(em, vi, 1);
 936                                         vm->m_data[vi] = n_junglegrass;
 937                                 }
 938                         }
 939                 }
 940
 941                 // Put trees in random places on part of division
 942                 for (u32 i = 0; i < tree_count; i++) {
 943                         s16 x = myrand_range(p2d_min.X, p2d_max.X);
 944                         s16 z = myrand_range(p2d_min.Y, p2d_max.Y);
 945                         int mapindex = central_area_size.X * (z - node_min.Z)
 946                                                         + (x - node_min.X);
 947                         s16 y = heightmap[mapindex];
 948                         // Don't make a tree under water level
 949                         // Don't make a tree so high that it doesn't fit
 950                         if (y < water_level || y > node_max.Y - 6)
 951                                 continue;
 952
 953                         v3s16 p(x, y, z);
 954                         // Trees grow only on mud and grass and snowblock
 955                         {
 956                                 u32 i = vm->m_area.index(p);
 957                                 content_t c = vm->m_data[i].getContent();
 958                                 if (c != c_dirt &&
 959                                                 c != c_dirt_with_grass &&
 960                                                 c != c_dirt_with_snow &&
 961                                                 c != c_snowblock)
 962                                         continue;
 963                         }
 964                         p.Y++;
 965
 966                         // Make a tree
 967                         if (bt == BT_JUNGLE) {
 968                                 treegen::make_jungletree(*vm, p, ndef, myrand());
 969                         } else if (bt == BT_TAIGA) {
 970                                 treegen::make_pine_tree(*vm, p - v3s16(0, 1, 0), ndef, myrand());
 971                         } else if (bt == BT_NORMAL) {
 972                                 bool is_apple_tree = (myrand_range(0, 3) == 0) &&
 973                                                         getHaveAppleTree(v2s16(x, z));
 974                                 treegen::make_tree(*vm, p, is_apple_tree, ndef, myrand());
 975                         }
 976                 }
 977         }
 978         //printf("placeTreesAndJungleGrass: %dms\n", t.stop());
 979 }
 980
 981
 982 void MapgenV6::growGrass() // Add surface nodes
 983 {
 984         MapNode n_dirt_with_grass(c_dirt_with_grass);
 985         MapNode n_dirt_with_snow(c_dirt_with_snow);
 986         MapNode n_snowblock(c_snowblock);
 987         MapNode n_snow(c_snow);
 988         v3s16 em = vm->m_area.getExtent();
 989
 990         u32 index = 0;
 991         for (s16 z = full_node_min.Z; z <= full_node_max.Z; z++)
 992         for (s16 x = full_node_min.X; x <= full_node_max.X; x++, index++) {
 993                 // Find the lowest surface to which enough light ends up to make
 994                 // grass grow.  Basically just wait until not air and not leaves.
 995                 s16 surface_y = 0;
 996                 {
 997                         u32 i = vm->m_area.index(x, node_max.Y, z);
 998                         s16 y;
 999                         // Go to ground level
1000                         for (y = node_max.Y; y >= full_node_min.Y; y--) {
1001                                 MapNode &n = vm->m_data[i];
1002                                 if (ndef->get(n).param_type != CPT_LIGHT ||
1003                                                 ndef->get(n).liquid_type != LIQUID_NONE ||
1004                                                 n.getContent() == c_ice)
1005                                         break;
1006                                 vm->m_area.add_y(em, i, -1);
1007                         }
1008                         surface_y = (y >= full_node_min.Y) ? y : full_node_min.Y;
1009                 }
1010
1011                 BiomeV6Type bt = getBiome(index, v2s16(x, z));
1012                 u32 i = vm->m_area.index(x, surface_y, z);
1013                 content_t c = vm->m_data[i].getContent();
1014                 if (surface_y >= water_level - 20) {
1015                         if (bt == BT_TAIGA && c == c_dirt) {
1016                                 vm->m_data[i] = n_snowblock;
1017                                 vm->m_area.add_y(em, i, -1);
1018                                 vm->m_data[i] = n_dirt_with_snow;
1019                         } else if (bt == BT_TUNDRA) {
1020                                 if (c == c_dirt) {
1021                                         vm->m_data[i] = n_dirt_with_snow;
1022                                 } else if (c == c_stone && surface_y < node_max.Y) {
1023                                         vm->m_area.add_y(em, i, 1);
1024                                         vm->m_data[i] = n_snow;
1025                                 }
1026                         } else if (c == c_dirt) {
1027                                 vm->m_data[i] = n_dirt_with_grass;
1028                         }
1029                 }
1030         }
1031 }
1032
1033
1034 void MapgenV6::generateCaves(int max_stone_y)
1035 {
1036         float cave_amount = NoisePerlin2D(np_cave, node_min.X, node_min.Y, seed);
1037         int volume_nodes = (node_max.X - node_min.X + 1) *
1038                                            (node_max.Y - node_min.Y + 1) * MAP_BLOCKSIZE;
1039         cave_amount = MYMAX(0.0, cave_amount);
1040         u32 caves_count = cave_amount * volume_nodes / 50000;
1041         u32 bruises_count = 1;
1042         PseudoRandom ps(blockseed + 21343);
1043         PseudoRandom ps2(blockseed + 1032);
1044
1045         if (ps.range(1, 6) == 1)
1046                 bruises_count = ps.range(0, ps.range(0, 2));
1047
1048         if (getBiome(v2s16(node_min.X, node_min.Z)) == BT_DESERT) {
1049                 caves_count   /= 3;
1050                 bruises_count /= 3;
1051         }
1052
1053         for (u32 i = 0; i < caves_count + bruises_count; i++) {
1054                 bool large_cave = (i >= caves_count);
1055                 CaveV6 cave(this, &ps, &ps2, large_cave);
1056
1057                 cave.makeCave(node_min, node_max, max_stone_y);
1058         }
1059 }