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 "main.h" // For g_profiler
  34 #include "emerge.h"
  35 #include "dungeongen.h"
  36 #include "cavegen.h"
  37 #include "treegen.h"
  38 #include "mg_ore.h"
  39 #include "mg_decoration.h"
  40 #include "mapgen_v6.h"
  41
  42 FlagDesc flagdesc_mapgen_v6[] = {
  43         {"jungles",    MGV6_JUNGLES},
  44         {"biomeblend", MGV6_BIOMEBLEND},
  45         {"mudflow",    MGV6_MUDFLOW},
  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         MapgenV6Params *sp = (MapgenV6Params *)params->sparams;
  59         this->spflags     = sp->spflags;
  60         this->freq_desert = sp->freq_desert;
  61         this->freq_beach  = sp->freq_beach;
  62
  63         np_cave        = &sp->np_cave;
  64         np_humidity    = &sp->np_humidity;
  65         np_trees       = &sp->np_trees;
  66         np_apple_trees = &sp->np_apple_trees;
  67
  68         //// Create noise objects
  69         noise_terrain_base   = new Noise(&sp->np_terrain_base,   seed, csize.X, csize.Y);
  70         noise_terrain_higher = new Noise(&sp->np_terrain_higher, seed, csize.X, csize.Y);
  71         noise_steepness      = new Noise(&sp->np_steepness,      seed, csize.X, csize.Y);
  72         noise_height_select  = new Noise(&sp->np_height_select,  seed, csize.X, csize.Y);
  73         noise_mud            = new Noise(&sp->np_mud,            seed, csize.X, csize.Y);
  74         noise_beach          = new Noise(&sp->np_beach,          seed, csize.X, csize.Y);
  75         noise_biome          = new Noise(&sp->np_biome,          seed, csize.X, csize.Y);
  76
  77         //// Resolve nodes to be used
  78         INodeDefManager *ndef = emerge->ndef;
  79
  80         c_stone           = ndef->getId("mapgen_stone");
  81         c_dirt            = ndef->getId("mapgen_dirt");
  82         c_dirt_with_grass = ndef->getId("mapgen_dirt_with_grass");
  83         c_sand            = ndef->getId("mapgen_sand");
  84         c_water_source    = ndef->getId("mapgen_water_source");
  85         c_lava_source     = ndef->getId("mapgen_lava_source");
  86         c_gravel          = ndef->getId("mapgen_gravel");
  87         c_cobble          = ndef->getId("mapgen_cobble");
  88         c_desert_sand     = ndef->getId("mapgen_desert_sand");
  89         c_desert_stone    = ndef->getId("mapgen_desert_stone");
  90         c_mossycobble     = ndef->getId("mapgen_mossycobble");
  91         c_sandbrick       = ndef->getId("mapgen_sandstonebrick");
  92         c_stair_cobble    = ndef->getId("mapgen_stair_cobble");
  93         c_stair_sandstone = ndef->getId("mapgen_stair_sandstone");
  94         if (c_desert_sand == CONTENT_IGNORE)
  95                 c_desert_sand = c_sand;
  96         if (c_desert_stone == CONTENT_IGNORE)
  97                 c_desert_stone = c_stone;
  98         if (c_mossycobble == CONTENT_IGNORE)
  99                 c_mossycobble = c_cobble;
 100         if (c_sandbrick == CONTENT_IGNORE)
 101                 c_sandbrick = c_desert_stone;
 102         if (c_stair_cobble == CONTENT_IGNORE)
 103                 c_stair_cobble = c_cobble;
 104         if (c_stair_sandstone == CONTENT_IGNORE)
 105                 c_stair_sandstone = c_sandbrick;
 106 }
 107
 108
 109 MapgenV6::~MapgenV6() {
 110         delete noise_terrain_base;
 111         delete noise_terrain_higher;
 112         delete noise_steepness;
 113         delete noise_height_select;
 114         delete noise_mud;
 115         delete noise_beach;
 116         delete noise_biome;
 117 }
 118
 119
 120 MapgenV6Params::MapgenV6Params() {
 121         spflags     = MGV6_BIOMEBLEND | MGV6_MUDFLOW;
 122         freq_desert = 0.45;
 123         freq_beach  = 0.15;
 124
 125         np_terrain_base   = NoiseParams(-4,  20.0, v3f(250.0, 250.0, 250.0), 82341,  5, 0.6, 2.0);
 126         np_terrain_higher = NoiseParams(20,  16.0, v3f(500.0, 500.0, 500.0), 85039,  5, 0.6, 2.0);
 127         np_steepness      = NoiseParams(0.85,0.5,  v3f(125.0, 125.0, 125.0), -932,   5, 0.7, 2.0);
 128         np_height_select  = NoiseParams(0,   1.0,  v3f(250.0, 250.0, 250.0), 4213,   5, 0.69, 2.0);
 129         np_mud            = NoiseParams(4,   2.0,  v3f(200.0, 200.0, 200.0), 91013,  3, 0.55, 2.0);
 130         np_beach          = NoiseParams(0,   1.0,  v3f(250.0, 250.0, 250.0), 59420,  3, 0.50, 2.0);
 131         np_biome          = NoiseParams(0,   1.0,  v3f(250.0, 250.0, 250.0), 9130,   3, 0.50, 2.0);
 132         np_cave           = NoiseParams(6,   6.0,  v3f(250.0, 250.0, 250.0), 34329,  3, 0.50, 2.0);
 133         np_humidity       = NoiseParams(0.5, 0.5,  v3f(500.0, 500.0, 500.0), 72384,  4, 0.66, 2.0);
 134         np_trees          = NoiseParams(0,   1.0,  v3f(125.0, 125.0, 125.0), 2,      4, 0.66, 2.0);
 135         np_apple_trees    = NoiseParams(0,   1.0,  v3f(100.0, 100.0, 100.0), 342902, 3, 0.45, 2.0);
 136 }
 137
 138
 139 void MapgenV6Params::readParams(Settings *settings) {
 140         settings->getFlagStrNoEx("mgv6_spflags", spflags, flagdesc_mapgen_v6);
 141         settings->getFloatNoEx("mgv6_freq_desert", freq_desert);
 142         settings->getFloatNoEx("mgv6_freq_beach",  freq_beach);
 143
 144         settings->getNoiseParams("mgv6_np_terrain_base",   np_terrain_base);
 145         settings->getNoiseParams("mgv6_np_terrain_higher", np_terrain_higher);
 146         settings->getNoiseParams("mgv6_np_steepness",      np_steepness);
 147         settings->getNoiseParams("mgv6_np_height_select",  np_height_select);
 148         settings->getNoiseParams("mgv6_np_mud",            np_mud);
 149         settings->getNoiseParams("mgv6_np_beach",          np_beach);
 150         settings->getNoiseParams("mgv6_np_biome",          np_biome);
 151         settings->getNoiseParams("mgv6_np_cave",           np_cave);
 152         settings->getNoiseParams("mgv6_np_humidity",       np_humidity);
 153         settings->getNoiseParams("mgv6_np_trees",          np_trees);
 154         settings->getNoiseParams("mgv6_np_apple_trees",    np_apple_trees);
 155 }
 156
 157
 158 void MapgenV6Params::writeParams(Settings *settings) {
 159         settings->setFlagStr("mgv6_spflags", spflags, flagdesc_mapgen_v6, (u32)-1);
 160         settings->setFloat("mgv6_freq_desert", freq_desert);
 161         settings->setFloat("mgv6_freq_beach",  freq_beach);
 162
 163         settings->setNoiseParams("mgv6_np_terrain_base",   np_terrain_base);
 164         settings->setNoiseParams("mgv6_np_terrain_higher", np_terrain_higher);
 165         settings->setNoiseParams("mgv6_np_steepness",      np_steepness);
 166         settings->setNoiseParams("mgv6_np_height_select",  np_height_select);
 167         settings->setNoiseParams("mgv6_np_mud",            np_mud);
 168         settings->setNoiseParams("mgv6_np_beach",          np_beach);
 169         settings->setNoiseParams("mgv6_np_biome",          np_biome);
 170         settings->setNoiseParams("mgv6_np_cave",           np_cave);
 171         settings->setNoiseParams("mgv6_np_humidity",       np_humidity);
 172         settings->setNoiseParams("mgv6_np_trees",          np_trees);
 173         settings->setNoiseParams("mgv6_np_apple_trees",    np_apple_trees);
 174 }
 175
 176
 177 //////////////////////// Some helper functions for the map generator
 178
 179
 180 // Returns Y one under area minimum if not found
 181 s16 MapgenV6::find_stone_level(v2s16 p2d) {
 182         v3s16 em = vm->m_area.getExtent();
 183         s16 y_nodes_max = vm->m_area.MaxEdge.Y;
 184         s16 y_nodes_min = vm->m_area.MinEdge.Y;
 185         u32 i = vm->m_area.index(p2d.X, y_nodes_max, p2d.Y);
 186         s16 y;
 187
 188         for (y = y_nodes_max; y >= y_nodes_min; y--) {
 189                 MapNode &n = vm->m_data[i];
 190                 content_t c = n.getContent();
 191                 if (c != CONTENT_IGNORE && (
 192                         c == c_stone || c == c_desert_stone))
 193                         break;
 194
 195                 vm->m_area.add_y(em, i, -1);
 196         }
 197         return (y >= y_nodes_min) ? y : y_nodes_min - 1;
 198 }
 199
 200
 201 // Required by mapgen.h
 202 bool MapgenV6::block_is_underground(u64 seed, v3s16 blockpos)
 203 {
 204         /*s16 minimum_groundlevel = (s16)get_sector_minimum_ground_level(
 205                         seed, v2s16(blockpos.X, blockpos.Z));*/
 206         // Nah, this is just a heuristic, just return something
 207         s16 minimum_groundlevel = water_level;
 208
 209         if(blockpos.Y*MAP_BLOCKSIZE + MAP_BLOCKSIZE <= minimum_groundlevel)
 210                 return true;
 211         else
 212                 return false;
 213 }
 214
 215
 216 //////////////////////// Base terrain height functions
 217
 218 float MapgenV6::baseTerrainLevel(float terrain_base, float terrain_higher,
 219                                                                         float steepness, float height_select) {
 220         float base   = 1 + terrain_base;
 221         float higher = 1 + terrain_higher;
 222
 223         // Limit higher ground level to at least base
 224         if(higher < base)
 225                 higher = base;
 226
 227         // Steepness factor of cliffs
 228         float b = steepness;
 229         b = rangelim(b, 0.0, 1000.0);
 230         b = 5 * b * b * b * b * b * b * b;
 231         b = rangelim(b, 0.5, 1000.0);
 232
 233         // Values 1.5...100 give quite horrible looking slopes
 234         if (b > 1.5 && b < 100.0)
 235                 b = (b < 10.0) ? 1.5 : 100.0;
 236
 237         float a_off = -0.20; // Offset to more low
 238         float a = 0.5 + b * (a_off + height_select);
 239         a = rangelim(a, 0.0, 1.0); // Limit
 240
 241         return base * (1.0 - a) + higher * a;
 242 }
 243
 244
 245 float MapgenV6::baseTerrainLevelFromNoise(v2s16 p) {
 246         if (flags & MG_FLAT)
 247                 return water_level;
 248
 249         float terrain_base   = NoisePerlin2D_PO(&noise_terrain_base->np,
 250                                                         p.X, 0.5, p.Y, 0.5, seed);
 251         float terrain_higher = NoisePerlin2D_PO(&noise_terrain_higher->np,
 252                                                         p.X, 0.5, p.Y, 0.5, seed);
 253         float steepness      = NoisePerlin2D_PO(&noise_steepness->np,
 254                                                         p.X, 0.5, p.Y, 0.5, seed);
 255         float height_select  = NoisePerlin2D_PO(&noise_height_select->np,
 256                                                         p.X, 0.5, p.Y, 0.5, seed);
 257
 258         return baseTerrainLevel(terrain_base, terrain_higher,
 259                                                         steepness,    height_select);
 260 }
 261
 262
 263 float MapgenV6::baseTerrainLevelFromMap(v2s16 p) {
 264         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 265         return baseTerrainLevelFromMap(index);
 266 }
 267
 268
 269 float MapgenV6::baseTerrainLevelFromMap(int index) {
 270         if (flags & MG_FLAT)
 271                 return water_level;
 272
 273         float terrain_base   = noise_terrain_base->result[index];
 274         float terrain_higher = noise_terrain_higher->result[index];
 275         float steepness      = noise_steepness->result[index];
 276         float height_select  = noise_height_select->result[index];
 277
 278         return baseTerrainLevel(terrain_base, terrain_higher,
 279                                                         steepness,    height_select);
 280 }
 281
 282
 283 s16 MapgenV6::find_ground_level_from_noise(u64 seed, v2s16 p2d, s16 precision) {
 284         return baseTerrainLevelFromNoise(p2d) + AVERAGE_MUD_AMOUNT;
 285 }
 286
 287
 288 int MapgenV6::getGroundLevelAtPoint(v2s16 p) {
 289         return baseTerrainLevelFromNoise(p) + AVERAGE_MUD_AMOUNT;
 290 }
 291
 292
 293 //////////////////////// Noise functions
 294
 295 float MapgenV6::getMudAmount(v2s16 p) {
 296         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 297         return getMudAmount(index);
 298 }
 299
 300
 301 bool MapgenV6::getHaveBeach(v2s16 p) {
 302         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 303         return getHaveBeach(index);
 304 }
 305
 306
 307 BiomeV6Type MapgenV6::getBiome(v2s16 p) {
 308         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 309         return getBiome(index, p);
 310 }
 311
 312
 313 float MapgenV6::getHumidity(v2s16 p)
 314 {
 315         /*double noise = noise2d_perlin(
 316                 0.5+(float)p.X/500, 0.5+(float)p.Y/500,
 317                 seed+72384, 4, 0.66);
 318         noise = (noise + 1.0)/2.0;*/
 319
 320         float noise = NoisePerlin2D(np_humidity, p.X, p.Y, seed);
 321
 322         if (noise < 0.0)
 323                 noise = 0.0;
 324         if (noise > 1.0)
 325                 noise = 1.0;
 326         return noise;
 327 }
 328
 329
 330 float MapgenV6::getTreeAmount(v2s16 p)
 331 {
 332         /*double noise = noise2d_perlin(
 333                         0.5+(float)p.X/125, 0.5+(float)p.Y/125,
 334                         seed+2, 4, 0.66);*/
 335
 336         float noise = NoisePerlin2D(np_trees, p.X, p.Y, seed);
 337         float zeroval = -0.39;
 338         if (noise < zeroval)
 339                 return 0;
 340         else
 341                 return 0.04 * (noise-zeroval) / (1.0-zeroval);
 342 }
 343
 344
 345 bool MapgenV6::getHaveAppleTree(v2s16 p)
 346 {
 347         /*is_apple_tree = noise2d_perlin(
 348                 0.5+(float)p.X/100, 0.5+(float)p.Z/100,
 349                 data->seed+342902, 3, 0.45) > 0.2;*/
 350
 351         float noise = NoisePerlin2D(np_apple_trees, p.X, p.Y, seed);
 352
 353         return noise > 0.2;
 354 }
 355
 356
 357 float MapgenV6::getMudAmount(int index)
 358 {
 359         if (flags & MG_FLAT)
 360                 return AVERAGE_MUD_AMOUNT;
 361
 362         /*return ((float)AVERAGE_MUD_AMOUNT + 2.0 * noise2d_perlin(
 363                         0.5+(float)p.X/200, 0.5+(float)p.Y/200,
 364                         seed+91013, 3, 0.55));*/
 365
 366         return noise_mud->result[index];
 367 }
 368
 369
 370 bool MapgenV6::getHaveBeach(int index)
 371 {
 372         // Determine whether to have sand here
 373         /*double sandnoise = noise2d_perlin(
 374                         0.2+(float)p2d.X/250, 0.7+(float)p2d.Y/250,
 375                         seed+59420, 3, 0.50);*/
 376
 377         float sandnoise = noise_beach->result[index];
 378         return (sandnoise > freq_beach);
 379 }
 380
 381
 382 BiomeV6Type MapgenV6::getBiome(int index, v2s16 p)
 383 {
 384         // Just do something very simple as for now
 385         /*double d = noise2d_perlin(
 386                         0.6+(float)p2d.X/250, 0.2+(float)p2d.Y/250,
 387                         seed+9130, 3, 0.50);*/
 388
 389         float d = noise_biome->result[index];
 390         if (d > freq_desert)
 391                 return BT_DESERT;
 392
 393         if ((spflags & MGV6_BIOMEBLEND) &&
 394                 (d > freq_desert - 0.10) &&
 395                 ((noise2d(p.X, p.Y, seed) + 1.0) > (freq_desert - d) * 20.0))
 396                 return BT_DESERT;
 397
 398         return BT_NORMAL;
 399 }
 400
 401
 402 u32 MapgenV6::get_blockseed(u64 seed, v3s16 p)
 403 {
 404         s32 x=p.X, y=p.Y, z=p.Z;
 405         return (u32)(seed%0x100000000ULL) + z*38134234 + y*42123 + x*23;
 406 }
 407
 408
 409 //////////////////////// Map generator
 410
 411 void MapgenV6::makeChunk(BlockMakeData *data) {
 412         assert(data->vmanip);
 413         assert(data->nodedef);
 414         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 415                    data->blockpos_requested.Y >= data->blockpos_min.Y &&
 416                    data->blockpos_requested.Z >= data->blockpos_min.Z);
 417         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 418                    data->blockpos_requested.Y <= data->blockpos_max.Y &&
 419                    data->blockpos_requested.Z <= data->blockpos_max.Z);
 420
 421         this->generating = true;
 422         this->vm   = data->vmanip;
 423         this->ndef = data->nodedef;
 424
 425         // Hack: use minimum block coords for old code that assumes a single block
 426         v3s16 blockpos = data->blockpos_requested;
 427         v3s16 blockpos_min = data->blockpos_min;
 428         v3s16 blockpos_max = data->blockpos_max;
 429
 430         // Area of central chunk
 431         node_min = blockpos_min*MAP_BLOCKSIZE;
 432         node_max = (blockpos_max+v3s16(1,1,1))*MAP_BLOCKSIZE-v3s16(1,1,1);
 433
 434         // Full allocated area
 435         full_node_min = (blockpos_min-1)*MAP_BLOCKSIZE;
 436         full_node_max = (blockpos_max+2)*MAP_BLOCKSIZE-v3s16(1,1,1);
 437
 438         central_area_size = node_max - node_min + v3s16(1,1,1);
 439         assert(central_area_size.X == central_area_size.Z);
 440
 441         int volume_blocks = (blockpos_max.X - blockpos_min.X + 1)
 442                                           * (blockpos_max.Y - blockpos_min.Y + 1)
 443                                           * (blockpos_max.Z - blockpos_max.Z + 1);
 444
 445         volume_nodes = volume_blocks *
 446                 MAP_BLOCKSIZE * MAP_BLOCKSIZE * MAP_BLOCKSIZE;
 447
 448         // Create a block-specific seed
 449         blockseed = get_blockseed(data->seed, full_node_min);
 450
 451         // Make some noise
 452         calculateNoise();
 453
 454         // Maximum height of the stone surface and obstacles.
 455         // This is used to guide the cave generation
 456         s16 stone_surface_max_y;
 457
 458         // Generate general ground level to full area
 459         stone_surface_max_y = generateGround();
 460
 461         generateExperimental();
 462
 463         const s16 max_spread_amount = MAP_BLOCKSIZE;
 464         // Limit dirt flow area by 1 because mud is flown into neighbors.
 465         s16 mudflow_minpos = -max_spread_amount + 1;
 466         s16 mudflow_maxpos = central_area_size.X + max_spread_amount - 2;
 467
 468         // Loop this part, it will make stuff look older and newer nicely
 469         const u32 age_loops = 2;
 470         for (u32 i_age = 0; i_age < age_loops; i_age++) { // Aging loop
 471                 // Make caves (this code is relatively horrible)
 472                 if (flags & MG_CAVES)
 473                         generateCaves(stone_surface_max_y);
 474
 475                 // Add mud to the central chunk
 476                 addMud();
 477
 478                 // Add blobs of dirt and gravel underground
 479                 addDirtGravelBlobs();
 480
 481                 // Flow mud away from steep edges
 482                 if (spflags & MGV6_MUDFLOW)
 483                         flowMud(mudflow_minpos, mudflow_maxpos);
 484
 485         }
 486
 487         // Add dungeons
 488         if (flags & MG_DUNGEONS) {
 489                 DungeonParams dp;
 490
 491                 dp.np_rarity  = nparams_dungeon_rarity;
 492                 dp.np_density = nparams_dungeon_density;
 493                 dp.np_wetness = nparams_dungeon_wetness;
 494                 dp.c_water = c_water_source;
 495                 if (getBiome(0, v2s16(node_min.X, node_min.Z)) == BT_NORMAL) {
 496                         dp.c_cobble  = c_cobble;
 497                         dp.c_moss    = c_mossycobble;
 498                         dp.c_stair   = c_stair_cobble;
 499
 500                         dp.diagonal_dirs = false;
 501                         dp.mossratio  = 3.0;
 502                         dp.holesize   = v3s16(1, 2, 1);
 503                         dp.roomsize   = v3s16(0, 0, 0);
 504                         dp.notifytype = GENNOTIFY_DUNGEON;
 505                 } else {
 506                         dp.c_cobble  = c_sandbrick;
 507                         dp.c_moss    = c_sandbrick; // should make this 'cracked sandstone' later
 508                         dp.c_stair   = c_stair_sandstone;
 509
 510                         dp.diagonal_dirs = true;
 511                         dp.mossratio  = 0.0;
 512                         dp.holesize   = v3s16(2, 3, 2);
 513                         dp.roomsize   = v3s16(2, 5, 2);
 514                         dp.notifytype = GENNOTIFY_TEMPLE;
 515                 }
 516
 517                 DungeonGen dgen(this, &dp);
 518                 dgen.generate(blockseed, full_node_min, full_node_max);
 519         }
 520
 521         // Add top and bottom side of water to transforming_liquid queue
 522         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 523
 524         // Grow grass
 525         growGrass();
 526
 527         // Generate some trees, and add grass, if a jungle
 528         if (flags & MG_TREES)
 529                 placeTreesAndJungleGrass();
 530
 531         // Generate the registered decorations
 532         m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
 533
 534         // Generate the registered ores
 535         m_emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
 536
 537         // Calculate lighting
 538         if (flags & MG_LIGHT)
 539                 calcLighting(node_min - v3s16(1, 1, 1) * MAP_BLOCKSIZE,
 540                                          node_max + v3s16(1, 0, 1) * MAP_BLOCKSIZE);
 541
 542         this->generating = false;
 543 }
 544
 545
 546 void MapgenV6::calculateNoise() {
 547         int x = node_min.X;
 548         int z = node_min.Z;
 549
 550         if (!(flags & MG_FLAT)) {
 551                 noise_terrain_base->perlinMap2D_PO(x, 0.5, z, 0.5);
 552                 noise_terrain_higher->perlinMap2D_PO(x, 0.5, z, 0.5);
 553                 noise_steepness->perlinMap2D_PO(x, 0.5, z, 0.5);
 554                 noise_height_select->perlinMap2D_PO(x, 0.5, z, 0.5);
 555                 noise_mud->perlinMap2D_PO(x, 0.5, z, 0.5);
 556         }
 557
 558         noise_beach->perlinMap2D_PO(x, 0.2, z, 0.7);
 559         noise_biome->perlinMap2D_PO(x, 0.6, z, 0.2);
 560 }
 561
 562
 563 int MapgenV6::generateGround() {
 564         //TimeTaker timer1("Generating ground level");
 565         MapNode n_air(CONTENT_AIR), n_water_source(c_water_source);
 566         MapNode n_stone(c_stone), n_desert_stone(c_desert_stone);
 567         int stone_surface_max_y = -MAP_GENERATION_LIMIT;
 568         u32 index = 0;
 569
 570         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 571         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 572                 // Surface height
 573                 s16 surface_y = (s16)baseTerrainLevelFromMap(index);
 574
 575                 // Log it
 576                 if (surface_y > stone_surface_max_y)
 577                         stone_surface_max_y = surface_y;
 578
 579                 BiomeV6Type bt = getBiome(index, v2s16(x, z));
 580
 581                 // Fill ground with stone
 582                 v3s16 em = vm->m_area.getExtent();
 583                 u32 i = vm->m_area.index(x, node_min.Y, z);
 584                 for (s16 y = node_min.Y; y <= node_max.Y; y++) {
 585                         if (vm->m_data[i].getContent() == CONTENT_IGNORE) {
 586                                 if (y <= surface_y) {
 587                                         vm->m_data[i] = (y > water_level && bt == BT_DESERT) ?
 588                                                 n_desert_stone : n_stone;
 589                                 } else if (y <= water_level) {
 590                                         vm->m_data[i] = n_water_source;
 591                                 } else {
 592                                         vm->m_data[i] = n_air;
 593                                 }
 594                         }
 595                         vm->m_area.add_y(em, i, 1);
 596                 }
 597         }
 598
 599         return stone_surface_max_y;
 600 }
 601
 602
 603 void MapgenV6::addMud() {
 604         // 15ms @cs=8
 605         //TimeTaker timer1("add mud");
 606         MapNode n_dirt(c_dirt), n_gravel(c_gravel);
 607         MapNode n_sand(c_sand), n_desert_sand(c_desert_sand);
 608         MapNode addnode;
 609
 610         u32 index = 0;
 611         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 612         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 613                 // Randomize mud amount
 614                 s16 mud_add_amount = getMudAmount(index) / 2.0 + 0.5;
 615
 616                 // Find ground level
 617                 s16 surface_y = find_stone_level(v2s16(x, z)); /////////////////optimize this!
 618
 619                 // Handle area not found
 620                 if (surface_y == vm->m_area.MinEdge.Y - 1)
 621                         continue;
 622
 623                 BiomeV6Type bt = getBiome(index, v2s16(x, z));
 624                 addnode = (bt == BT_DESERT) ? n_desert_sand : n_dirt;
 625
 626                 if (bt == BT_DESERT && surface_y + mud_add_amount <= water_level + 1) {
 627                         addnode = n_sand;
 628                 } else if (mud_add_amount <= 0) {
 629                         mud_add_amount = 1 - mud_add_amount;
 630                         addnode = n_gravel;
 631                 } else if (bt == BT_NORMAL && getHaveBeach(index) &&
 632                                 surface_y + mud_add_amount <= water_level + 2) {
 633                         addnode = n_sand;
 634                 }
 635
 636                 if (bt == BT_DESERT && surface_y > 20)
 637                         mud_add_amount = MYMAX(0, mud_add_amount - (surface_y - 20) / 5);
 638
 639                 // If topmost node is grass, change it to mud.  It might be if it was
 640                 // flown to there from a neighboring chunk and then converted.
 641                 u32 i = vm->m_area.index(x, surface_y, z);
 642                 if (vm->m_data[i].getContent() == c_dirt_with_grass)
 643                         vm->m_data[i] = n_dirt;
 644
 645                 // Add mud on ground
 646                 s16 mudcount = 0;
 647                 v3s16 em = vm->m_area.getExtent();
 648                 s16 y_start = surface_y + 1;
 649                 i = vm->m_area.index(x, y_start, z);
 650                 for (s16 y = y_start; y <= node_max.Y; y++) {
 651                         if (mudcount >= mud_add_amount)
 652                                 break;
 653
 654                         vm->m_data[i] = addnode;
 655                         mudcount++;
 656
 657                         vm->m_area.add_y(em, i, 1);
 658                 }
 659         }
 660 }
 661
 662
 663 void MapgenV6::flowMud(s16 &mudflow_minpos, s16 &mudflow_maxpos) {
 664         // 340ms @cs=8
 665         TimeTaker timer1("flow mud");
 666
 667         // Iterate a few times
 668         for(s16 k = 0; k < 3; k++) {
 669                 for (s16 z = mudflow_minpos; z <= mudflow_maxpos; z++)
 670                 for (s16 x = mudflow_minpos; x <= mudflow_maxpos; x++) {
 671                         // Invert coordinates every 2nd iteration
 672                         if (k % 2 == 0) {
 673                                 x = mudflow_maxpos - (x - mudflow_minpos);
 674                                 z = mudflow_maxpos - (z - mudflow_minpos);
 675                         }
 676
 677                         // Node position in 2d
 678                         v2s16 p2d = v2s16(node_min.X, node_min.Z) + v2s16(x, z);
 679
 680                         v3s16 em = vm->m_area.getExtent();
 681                         u32 i = vm->m_area.index(p2d.X, node_max.Y, p2d.Y);
 682                         s16 y = node_max.Y;
 683
 684                         while(y >= node_min.Y)
 685                         {
 686
 687                         for(;; y--)
 688                         {
 689                                 MapNode *n = NULL;
 690                                 // Find mud
 691                                 for(; y >= node_min.Y; y--) {
 692                                         n = &vm->m_data[i];
 693                                         if (n->getContent() == c_dirt ||
 694                                                 n->getContent() == c_dirt_with_grass ||
 695                                                 n->getContent() == c_gravel)
 696                                                 break;
 697
 698                                         vm->m_area.add_y(em, i, -1);
 699                                 }
 700
 701                                 // Stop if out of area
 702                                 //if(vmanip.m_area.contains(i) == false)
 703                                 if (y < node_min.Y)
 704                                         break;
 705
 706                                 if (n->getContent() == c_dirt ||
 707                                         n->getContent() == c_dirt_with_grass)
 708                                 {
 709                                         // Make it exactly mud
 710                                         n->setContent(c_dirt);
 711
 712                                         // Don't flow it if the stuff under it is not mud
 713                                         {
 714                                                 u32 i2 = i;
 715                                                 vm->m_area.add_y(em, i2, -1);
 716                                                 // Cancel if out of area
 717                                                 if(vm->m_area.contains(i2) == false)
 718                                                         continue;
 719                                                 MapNode *n2 = &vm->m_data[i2];
 720                                                 if (n2->getContent() != c_dirt &&
 721                                                         n2->getContent() != c_dirt_with_grass)
 722                                                         continue;
 723                                         }
 724                                 }
 725
 726                                 v3s16 dirs4[4] = {
 727                                         v3s16(0,0,1), // back
 728                                         v3s16(1,0,0), // right
 729                                         v3s16(0,0,-1), // front
 730                                         v3s16(-1,0,0), // left
 731                                 };
 732
 733                                 // Check that upper is air or doesn't exist.
 734                                 // Cancel dropping if upper keeps it in place
 735                                 u32 i3 = i;
 736                                 vm->m_area.add_y(em, i3, 1);
 737                                 if (vm->m_area.contains(i3) == true &&
 738                                         ndef->get(vm->m_data[i3]).walkable)
 739                                         continue;
 740
 741                                 // Drop mud on side
 742                                 for(u32 di=0; di<4; di++) {
 743                                         v3s16 dirp = dirs4[di];
 744                                         u32 i2 = i;
 745                                         // Move to side
 746                                         vm->m_area.add_p(em, i2, dirp);
 747                                         // Fail if out of area
 748                                         if (vm->m_area.contains(i2) == false)
 749                                                 continue;
 750                                         // Check that side is air
 751                                         MapNode *n2 = &vm->m_data[i2];
 752                                         if (ndef->get(*n2).walkable)
 753                                                 continue;
 754                                         // Check that under side is air
 755                                         vm->m_area.add_y(em, i2, -1);
 756                                         if (vm->m_area.contains(i2) == false)
 757                                                 continue;
 758                                         n2 = &vm->m_data[i2];
 759                                         if (ndef->get(*n2).walkable)
 760                                                 continue;
 761                                         // Loop further down until not air
 762                                         bool dropped_to_unknown = false;
 763                                         do {
 764                                                 vm->m_area.add_y(em, i2, -1);
 765                                                 n2 = &vm->m_data[i2];
 766                                                 // if out of known area
 767                                                 if(vm->m_area.contains(i2) == false ||
 768                                                         n2->getContent() == CONTENT_IGNORE) {
 769                                                         dropped_to_unknown = true;
 770                                                         break;
 771                                                 }
 772                                         } while (ndef->get(*n2).walkable == false);
 773                                         // Loop one up so that we're in air
 774                                         vm->m_area.add_y(em, i2, 1);
 775                                         n2 = &vm->m_data[i2];
 776
 777                                         bool old_is_water = (n->getContent() == c_water_source);
 778                                         // Move mud to new place
 779                                         if (!dropped_to_unknown) {
 780                                                 *n2 = *n;
 781                                                 // Set old place to be air (or water)
 782                                                 if(old_is_water)
 783                                                         *n = MapNode(c_water_source);
 784                                                 else
 785                                                         *n = MapNode(CONTENT_AIR);
 786                                         }
 787
 788                                         // Done
 789                                         break;
 790                                 }
 791                         }
 792                         }
 793                 }
 794         }
 795 }
 796
 797
 798 void MapgenV6::addDirtGravelBlobs() {
 799         if (getBiome(v2s16(node_min.X, node_min.Z)) != BT_NORMAL)
 800                 return;
 801
 802         PseudoRandom pr(blockseed + 983);
 803         for (int i = 0; i < volume_nodes/10/10/10; i++) {
 804                 bool only_fill_cave = (myrand_range(0,1) != 0);
 805                 v3s16 size(
 806                         pr.range(1, 8),
 807                         pr.range(1, 8),
 808                         pr.range(1, 8)
 809                 );
 810                 v3s16 p0(
 811                         pr.range(node_min.X, node_max.X) - size.X / 2,
 812                         pr.range(node_min.Y, node_max.Y) - size.Y / 2,
 813                         pr.range(node_min.Z, node_max.Z) - size.Z / 2
 814                 );
 815
 816                 MapNode n1((p0.Y > -32 && !pr.range(0, 1)) ? c_dirt : c_gravel);
 817                 for (int z1 = 0; z1 < size.Z; z1++)
 818                 for (int y1 = 0; y1 < size.Y; y1++)
 819                 for (int x1 = 0; x1 < size.X; x1++) {
 820                         v3s16 p = p0 + v3s16(x1, y1, z1);
 821                         u32 i = vm->m_area.index(p);
 822                         if (!vm->m_area.contains(i))
 823                                 continue;
 824                         // Cancel if not stone and not cave air
 825                         if (vm->m_data[i].getContent() != c_stone &&
 826                                 !(vm->m_flags[i] & VMANIP_FLAG_CAVE))
 827                                 continue;
 828                         if (only_fill_cave && !(vm->m_flags[i] & VMANIP_FLAG_CAVE))
 829                                 continue;
 830                         vm->m_data[i] = n1;
 831                 }
 832         }
 833 }
 834
 835
 836 void MapgenV6::placeTreesAndJungleGrass() {
 837         //TimeTaker t("placeTrees");
 838         if (node_max.Y < water_level)
 839                 return;
 840
 841         PseudoRandom grassrandom(blockseed + 53);
 842         content_t c_junglegrass = ndef->getId("mapgen_junglegrass");
 843         // if we don't have junglegrass, don't place cignore... that's bad
 844         if (c_junglegrass == CONTENT_IGNORE)
 845                 c_junglegrass = CONTENT_AIR;
 846         MapNode n_junglegrass(c_junglegrass);
 847         v3s16 em = vm->m_area.getExtent();
 848
 849         // Divide area into parts
 850         s16 div = 8;
 851         s16 sidelen = central_area_size.X / div;
 852         double area = sidelen * sidelen;
 853
 854         // N.B.  We must add jungle grass first, since tree leaves will
 855         // obstruct the ground, giving us a false ground level
 856         for (s16 z0 = 0; z0 < div; z0++)
 857         for (s16 x0 = 0; x0 < div; x0++) {
 858                 // Center position of part of division
 859                 v2s16 p2d_center(
 860                         node_min.X + sidelen / 2 + sidelen * x0,
 861                         node_min.Z + sidelen / 2 + sidelen * z0
 862                 );
 863                 // Minimum edge of part of division
 864                 v2s16 p2d_min(
 865                         node_min.X + sidelen * x0,
 866                         node_min.Z + sidelen * z0
 867                 );
 868                 // Maximum edge of part of division
 869                 v2s16 p2d_max(
 870                         node_min.X + sidelen + sidelen * x0 - 1,
 871                         node_min.Z + sidelen + sidelen * z0 - 1
 872                 );
 873
 874                 // Amount of trees, jungle area
 875                 u32 tree_count = area * getTreeAmount(p2d_center);
 876
 877                 float humidity;
 878                 bool is_jungle = false;
 879                 if (spflags & MGV6_JUNGLES) {
 880                         humidity = getHumidity(p2d_center);
 881                         if (humidity > 0.75) {
 882                                 is_jungle = true;
 883                                 tree_count *= 4;
 884                         }
 885                 }
 886
 887                 // Add jungle grass
 888                 if (is_jungle) {
 889                         u32 grass_count = 5 * humidity * tree_count;
 890                         for (u32 i = 0; i < grass_count; i++) {
 891                                 s16 x = grassrandom.range(p2d_min.X, p2d_max.X);
 892                                 s16 z = grassrandom.range(p2d_min.Y, p2d_max.Y);
 893
 894                                 s16 y = findGroundLevelFull(v2s16(x, z)); ////////////////optimize this!
 895                                 if (y < water_level || y < node_min.Y || y > node_max.Y)
 896                                         continue;
 897
 898                                 u32 vi = vm->m_area.index(x, y, z);
 899                                 // place on dirt_with_grass, since we know it is exposed to sunlight
 900                                 if (vm->m_data[vi].getContent() == c_dirt_with_grass) {
 901                                         vm->m_area.add_y(em, vi, 1);
 902                                         vm->m_data[vi] = n_junglegrass;
 903                                 }
 904                         }
 905                 }
 906
 907                 // Put trees in random places on part of division
 908                 for (u32 i = 0; i < tree_count; i++) {
 909                         s16 x = myrand_range(p2d_min.X, p2d_max.X);
 910                         s16 z = myrand_range(p2d_min.Y, p2d_max.Y);
 911                         s16 y = findGroundLevelFull(v2s16(x, z)); ////////////////////optimize this!
 912                         // Don't make a tree under water level
 913                         // Don't make a tree so high that it doesn't fit
 914                         if(y < water_level || y > node_max.Y - 6)
 915                                 continue;
 916
 917                         v3s16 p(x,y,z);
 918                         // Trees grow only on mud and grass
 919                         {
 920                                 u32 i = vm->m_area.index(p);
 921                                 MapNode *n = &vm->m_data[i];
 922                                 if (n->getContent() != c_dirt &&
 923                                         n->getContent() != c_dirt_with_grass)
 924                                         continue;
 925                         }
 926                         p.Y++;
 927
 928                         // Make a tree
 929                         if (is_jungle) {
 930                                 treegen::make_jungletree(*vm, p, ndef, myrand());
 931                         } else {
 932                                 bool is_apple_tree = (myrand_range(0, 3) == 0) &&
 933                                                                                 getHaveAppleTree(v2s16(x, z));
 934                                 treegen::make_tree(*vm, p, is_apple_tree, ndef, myrand());
 935                         }
 936                 }
 937         }
 938         //printf("placeTreesAndJungleGrass: %dms\n", t.stop());
 939 }
 940
 941
 942 void MapgenV6::growGrass() {
 943         for (s16 z = full_node_min.Z; z <= full_node_max.Z; z++)
 944         for (s16 x = full_node_min.X; x <= full_node_max.X; x++) {
 945                 // Find the lowest surface to which enough light ends up to make
 946                 // grass grow.  Basically just wait until not air and not leaves.
 947                 s16 surface_y = 0;
 948                 {
 949                         v3s16 em = vm->m_area.getExtent();
 950                         u32 i = vm->m_area.index(x, node_max.Y, z);
 951                         s16 y;
 952                         // Go to ground level
 953                         for (y = node_max.Y; y >= full_node_min.Y; y--) {
 954                                 MapNode &n = vm->m_data[i];
 955                                 if (ndef->get(n).param_type != CPT_LIGHT ||
 956                                         ndef->get(n).liquid_type != LIQUID_NONE)
 957                                         break;
 958                                 vm->m_area.add_y(em, i, -1);
 959                         }
 960                         surface_y = (y >= full_node_min.Y) ? y : full_node_min.Y;
 961                 }
 962
 963                 u32 i = vm->m_area.index(x, surface_y, z);
 964                 MapNode *n = &vm->m_data[i];
 965                 if (n->getContent() == c_dirt && surface_y >= water_level - 20)
 966                         n->setContent(c_dirt_with_grass);
 967         }
 968 }
 969
 970
 971 void MapgenV6::generateCaves(int max_stone_y) {
 972         float cave_amount = NoisePerlin2D(np_cave, node_min.X, node_min.Y, seed);
 973         int volume_nodes = (node_max.X - node_min.X + 1) *
 974                                            (node_max.Y - node_min.Y + 1) * MAP_BLOCKSIZE;
 975         cave_amount = MYMAX(0.0, cave_amount);
 976         u32 caves_count = cave_amount * volume_nodes / 50000;
 977         u32 bruises_count = 1;
 978         PseudoRandom ps(blockseed + 21343);
 979         PseudoRandom ps2(blockseed + 1032);
 980
 981         if (ps.range(1, 6) == 1)
 982                 bruises_count = ps.range(0, ps.range(0, 2));
 983
 984         if (getBiome(v2s16(node_min.X, node_min.Z)) == BT_DESERT) {
 985                 caves_count   /= 3;
 986                 bruises_count /= 3;
 987         }
 988
 989         for (u32 i = 0; i < caves_count + bruises_count; i++) {
 990                 bool large_cave = (i >= caves_count);
 991                 CaveV6 cave(this, &ps, &ps2, large_cave);
 992
 993                 cave.makeCave(node_min, node_max, max_stone_y);
 994         }
 995 }