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 {
 111         delete noise_terrain_base;
 112         delete noise_terrain_higher;
 113         delete noise_steepness;
 114         delete noise_height_select;
 115         delete noise_mud;
 116         delete noise_beach;
 117         delete noise_biome;
 118 }
 119
 120
 121 MapgenV6Params::MapgenV6Params()
 122 {
 123         spflags     = MGV6_BIOMEBLEND | MGV6_MUDFLOW;
 124         freq_desert = 0.45;
 125         freq_beach  = 0.15;
 126
 127         np_terrain_base   = NoiseParams(-4,  20.0, v3f(250.0, 250.0, 250.0), 82341,  5, 0.6, 2.0);
 128         np_terrain_higher = NoiseParams(20,  16.0, v3f(500.0, 500.0, 500.0), 85039,  5, 0.6, 2.0);
 129         np_steepness      = NoiseParams(0.85,0.5,  v3f(125.0, 125.0, 125.0), -932,   5, 0.7, 2.0);
 130         np_height_select  = NoiseParams(0,   1.0,  v3f(250.0, 250.0, 250.0), 4213,   5, 0.69, 2.0);
 131         np_mud            = NoiseParams(4,   2.0,  v3f(200.0, 200.0, 200.0), 91013,  3, 0.55, 2.0);
 132         np_beach          = NoiseParams(0,   1.0,  v3f(250.0, 250.0, 250.0), 59420,  3, 0.50, 2.0);
 133         np_biome          = NoiseParams(0,   1.0,  v3f(250.0, 250.0, 250.0), 9130,   3, 0.50, 2.0);
 134         np_cave           = NoiseParams(6,   6.0,  v3f(250.0, 250.0, 250.0), 34329,  3, 0.50, 2.0);
 135         np_humidity       = NoiseParams(0.5, 0.5,  v3f(500.0, 500.0, 500.0), 72384,  4, 0.66, 2.0);
 136         np_trees          = NoiseParams(0,   1.0,  v3f(125.0, 125.0, 125.0), 2,      4, 0.66, 2.0);
 137         np_apple_trees    = NoiseParams(0,   1.0,  v3f(100.0, 100.0, 100.0), 342902, 3, 0.45, 2.0);
 138 }
 139
 140
 141 void MapgenV6Params::readParams(Settings *settings)
 142 {
 143         settings->getFlagStrNoEx("mgv6_spflags", spflags, flagdesc_mapgen_v6);
 144         settings->getFloatNoEx("mgv6_freq_desert", freq_desert);
 145         settings->getFloatNoEx("mgv6_freq_beach",  freq_beach);
 146
 147         settings->getNoiseParams("mgv6_np_terrain_base",   np_terrain_base);
 148         settings->getNoiseParams("mgv6_np_terrain_higher", np_terrain_higher);
 149         settings->getNoiseParams("mgv6_np_steepness",      np_steepness);
 150         settings->getNoiseParams("mgv6_np_height_select",  np_height_select);
 151         settings->getNoiseParams("mgv6_np_mud",            np_mud);
 152         settings->getNoiseParams("mgv6_np_beach",          np_beach);
 153         settings->getNoiseParams("mgv6_np_biome",          np_biome);
 154         settings->getNoiseParams("mgv6_np_cave",           np_cave);
 155         settings->getNoiseParams("mgv6_np_humidity",       np_humidity);
 156         settings->getNoiseParams("mgv6_np_trees",          np_trees);
 157         settings->getNoiseParams("mgv6_np_apple_trees",    np_apple_trees);
 158 }
 159
 160
 161 void MapgenV6Params::writeParams(Settings *settings)
 162 {
 163         settings->setFlagStr("mgv6_spflags", spflags, flagdesc_mapgen_v6, (u32)-1);
 164         settings->setFloat("mgv6_freq_desert", freq_desert);
 165         settings->setFloat("mgv6_freq_beach",  freq_beach);
 166
 167         settings->setNoiseParams("mgv6_np_terrain_base",   np_terrain_base);
 168         settings->setNoiseParams("mgv6_np_terrain_higher", np_terrain_higher);
 169         settings->setNoiseParams("mgv6_np_steepness",      np_steepness);
 170         settings->setNoiseParams("mgv6_np_height_select",  np_height_select);
 171         settings->setNoiseParams("mgv6_np_mud",            np_mud);
 172         settings->setNoiseParams("mgv6_np_beach",          np_beach);
 173         settings->setNoiseParams("mgv6_np_biome",          np_biome);
 174         settings->setNoiseParams("mgv6_np_cave",           np_cave);
 175         settings->setNoiseParams("mgv6_np_humidity",       np_humidity);
 176         settings->setNoiseParams("mgv6_np_trees",          np_trees);
 177         settings->setNoiseParams("mgv6_np_apple_trees",    np_apple_trees);
 178 }
 179
 180
 181 //////////////////////// Some helper functions for the map generator
 182
 183
 184 // Returns Y one under area minimum if not found
 185 s16 MapgenV6::find_stone_level(v2s16 p2d)
 186 {
 187         v3s16 em = vm->m_area.getExtent();
 188         s16 y_nodes_max = vm->m_area.MaxEdge.Y;
 189         s16 y_nodes_min = vm->m_area.MinEdge.Y;
 190         u32 i = vm->m_area.index(p2d.X, y_nodes_max, p2d.Y);
 191         s16 y;
 192
 193         for (y = y_nodes_max; y >= y_nodes_min; y--) {
 194                 MapNode &n = vm->m_data[i];
 195                 content_t c = n.getContent();
 196                 if (c != CONTENT_IGNORE && (
 197                         c == c_stone || c == c_desert_stone))
 198                         break;
 199
 200                 vm->m_area.add_y(em, i, -1);
 201         }
 202         return (y >= y_nodes_min) ? y : y_nodes_min - 1;
 203 }
 204
 205
 206 // Required by mapgen.h
 207 bool MapgenV6::block_is_underground(u64 seed, v3s16 blockpos)
 208 {
 209         /*s16 minimum_groundlevel = (s16)get_sector_minimum_ground_level(
 210                         seed, v2s16(blockpos.X, blockpos.Z));*/
 211         // Nah, this is just a heuristic, just return something
 212         s16 minimum_groundlevel = water_level;
 213
 214         if(blockpos.Y*MAP_BLOCKSIZE + MAP_BLOCKSIZE <= minimum_groundlevel)
 215                 return true;
 216         else
 217                 return false;
 218 }
 219
 220
 221 //////////////////////// Base terrain height functions
 222
 223 float MapgenV6::baseTerrainLevel(float terrain_base, float terrain_higher,
 224         float steepness, float height_select)
 225 {
 226         float base   = 1 + terrain_base;
 227         float higher = 1 + terrain_higher;
 228
 229         // Limit higher ground level to at least base
 230         if(higher < base)
 231                 higher = base;
 232
 233         // Steepness factor of cliffs
 234         float b = steepness;
 235         b = rangelim(b, 0.0, 1000.0);
 236         b = 5 * b * b * b * b * b * b * b;
 237         b = rangelim(b, 0.5, 1000.0);
 238
 239         // Values 1.5...100 give quite horrible looking slopes
 240         if (b > 1.5 && b < 100.0)
 241                 b = (b < 10.0) ? 1.5 : 100.0;
 242
 243         float a_off = -0.20; // Offset to more low
 244         float a = 0.5 + b * (a_off + height_select);
 245         a = rangelim(a, 0.0, 1.0); // Limit
 246
 247         return base * (1.0 - a) + higher * a;
 248 }
 249
 250
 251 float MapgenV6::baseTerrainLevelFromNoise(v2s16 p)
 252 {
 253         if (flags & MG_FLAT)
 254                 return water_level;
 255
 256         float terrain_base   = NoisePerlin2D_PO(&noise_terrain_base->np,
 257                                                         p.X, 0.5, p.Y, 0.5, seed);
 258         float terrain_higher = NoisePerlin2D_PO(&noise_terrain_higher->np,
 259                                                         p.X, 0.5, p.Y, 0.5, seed);
 260         float steepness      = NoisePerlin2D_PO(&noise_steepness->np,
 261                                                         p.X, 0.5, p.Y, 0.5, seed);
 262         float height_select  = NoisePerlin2D_PO(&noise_height_select->np,
 263                                                         p.X, 0.5, p.Y, 0.5, seed);
 264
 265         return baseTerrainLevel(terrain_base, terrain_higher,
 266                                                         steepness,    height_select);
 267 }
 268
 269
 270 float MapgenV6::baseTerrainLevelFromMap(v2s16 p)
 271 {
 272         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 273         return baseTerrainLevelFromMap(index);
 274 }
 275
 276
 277 float MapgenV6::baseTerrainLevelFromMap(int index)
 278 {
 279         if (flags & MG_FLAT)
 280                 return water_level;
 281
 282         float terrain_base   = noise_terrain_base->result[index];
 283         float terrain_higher = noise_terrain_higher->result[index];
 284         float steepness      = noise_steepness->result[index];
 285         float height_select  = noise_height_select->result[index];
 286
 287         return baseTerrainLevel(terrain_base, terrain_higher,
 288                                                         steepness,    height_select);
 289 }
 290
 291
 292 s16 MapgenV6::find_ground_level_from_noise(u64 seed, v2s16 p2d, s16 precision)
 293 {
 294         return baseTerrainLevelFromNoise(p2d) + AVERAGE_MUD_AMOUNT;
 295 }
 296
 297
 298 int MapgenV6::getGroundLevelAtPoint(v2s16 p)
 299 {
 300         return baseTerrainLevelFromNoise(p) + AVERAGE_MUD_AMOUNT;
 301 }
 302
 303
 304 //////////////////////// Noise functions
 305
 306 float MapgenV6::getMudAmount(v2s16 p)
 307 {
 308         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 309         return getMudAmount(index);
 310 }
 311
 312
 313 bool MapgenV6::getHaveBeach(v2s16 p)
 314 {
 315         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 316         return getHaveBeach(index);
 317 }
 318
 319
 320 BiomeV6Type MapgenV6::getBiome(v2s16 p)
 321 {
 322         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 323         return getBiome(index, p);
 324 }
 325
 326
 327 float MapgenV6::getHumidity(v2s16 p)
 328 {
 329         /*double noise = noise2d_perlin(
 330                 0.5+(float)p.X/500, 0.5+(float)p.Y/500,
 331                 seed+72384, 4, 0.66);
 332         noise = (noise + 1.0)/2.0;*/
 333
 334         float noise = NoisePerlin2D(np_humidity, p.X, p.Y, seed);
 335
 336         if (noise < 0.0)
 337                 noise = 0.0;
 338         if (noise > 1.0)
 339                 noise = 1.0;
 340         return noise;
 341 }
 342
 343
 344 float MapgenV6::getTreeAmount(v2s16 p)
 345 {
 346         /*double noise = noise2d_perlin(
 347                         0.5+(float)p.X/125, 0.5+(float)p.Y/125,
 348                         seed+2, 4, 0.66);*/
 349
 350         float noise = NoisePerlin2D(np_trees, p.X, p.Y, seed);
 351         float zeroval = -0.39;
 352         if (noise < zeroval)
 353                 return 0;
 354         else
 355                 return 0.04 * (noise-zeroval) / (1.0-zeroval);
 356 }
 357
 358
 359 bool MapgenV6::getHaveAppleTree(v2s16 p)
 360 {
 361         /*is_apple_tree = noise2d_perlin(
 362                 0.5+(float)p.X/100, 0.5+(float)p.Z/100,
 363                 data->seed+342902, 3, 0.45) > 0.2;*/
 364
 365         float noise = NoisePerlin2D(np_apple_trees, p.X, p.Y, seed);
 366
 367         return noise > 0.2;
 368 }
 369
 370
 371 float MapgenV6::getMudAmount(int index)
 372 {
 373         if (flags & MG_FLAT)
 374                 return AVERAGE_MUD_AMOUNT;
 375
 376         /*return ((float)AVERAGE_MUD_AMOUNT + 2.0 * noise2d_perlin(
 377                         0.5+(float)p.X/200, 0.5+(float)p.Y/200,
 378                         seed+91013, 3, 0.55));*/
 379
 380         return noise_mud->result[index];
 381 }
 382
 383
 384 bool MapgenV6::getHaveBeach(int index)
 385 {
 386         // Determine whether to have sand here
 387         /*double sandnoise = noise2d_perlin(
 388                         0.2+(float)p2d.X/250, 0.7+(float)p2d.Y/250,
 389                         seed+59420, 3, 0.50);*/
 390
 391         float sandnoise = noise_beach->result[index];
 392         return (sandnoise > freq_beach);
 393 }
 394
 395
 396 BiomeV6Type MapgenV6::getBiome(int index, v2s16 p)
 397 {
 398         // Just do something very simple as for now
 399         /*double d = noise2d_perlin(
 400                         0.6+(float)p2d.X/250, 0.2+(float)p2d.Y/250,
 401                         seed+9130, 3, 0.50);*/
 402
 403         float d = noise_biome->result[index];
 404         if (d > freq_desert)
 405                 return BT_DESERT;
 406
 407         if ((spflags & MGV6_BIOMEBLEND) &&
 408                 (d > freq_desert - 0.10) &&
 409                 ((noise2d(p.X, p.Y, seed) + 1.0) > (freq_desert - d) * 20.0))
 410                 return BT_DESERT;
 411
 412         return BT_NORMAL;
 413 }
 414
 415
 416 u32 MapgenV6::get_blockseed(u64 seed, v3s16 p)
 417 {
 418         s32 x=p.X, y=p.Y, z=p.Z;
 419         return (u32)(seed%0x100000000ULL) + z*38134234 + y*42123 + x*23;
 420 }
 421
 422
 423 //////////////////////// Map generator
 424
 425 void MapgenV6::makeChunk(BlockMakeData *data)
 426 {
 427         assert(data->vmanip);
 428         assert(data->nodedef);
 429         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 430                    data->blockpos_requested.Y >= data->blockpos_min.Y &&
 431                    data->blockpos_requested.Z >= data->blockpos_min.Z);
 432         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 433                    data->blockpos_requested.Y <= data->blockpos_max.Y &&
 434                    data->blockpos_requested.Z <= data->blockpos_max.Z);
 435
 436         this->generating = true;
 437         this->vm   = data->vmanip;
 438         this->ndef = data->nodedef;
 439
 440         // Hack: use minimum block coords for old code that assumes a single block
 441         v3s16 blockpos = data->blockpos_requested;
 442         v3s16 blockpos_min = data->blockpos_min;
 443         v3s16 blockpos_max = data->blockpos_max;
 444
 445         // Area of central chunk
 446         node_min = blockpos_min*MAP_BLOCKSIZE;
 447         node_max = (blockpos_max+v3s16(1,1,1))*MAP_BLOCKSIZE-v3s16(1,1,1);
 448
 449         // Full allocated area
 450         full_node_min = (blockpos_min-1)*MAP_BLOCKSIZE;
 451         full_node_max = (blockpos_max+2)*MAP_BLOCKSIZE-v3s16(1,1,1);
 452
 453         central_area_size = node_max - node_min + v3s16(1,1,1);
 454         assert(central_area_size.X == central_area_size.Z);
 455
 456         int volume_blocks = (blockpos_max.X - blockpos_min.X + 1)
 457                                           * (blockpos_max.Y - blockpos_min.Y + 1)
 458                                           * (blockpos_max.Z - blockpos_max.Z + 1);
 459
 460         volume_nodes = volume_blocks *
 461                 MAP_BLOCKSIZE * MAP_BLOCKSIZE * MAP_BLOCKSIZE;
 462
 463         // Create a block-specific seed
 464         blockseed = get_blockseed(data->seed, full_node_min);
 465
 466         // Make some noise
 467         calculateNoise();
 468
 469         // Maximum height of the stone surface and obstacles.
 470         // This is used to guide the cave generation
 471         s16 stone_surface_max_y;
 472
 473         // Generate general ground level to full area
 474         stone_surface_max_y = generateGround();
 475
 476         generateExperimental();
 477
 478         const s16 max_spread_amount = MAP_BLOCKSIZE;
 479         // Limit dirt flow area by 1 because mud is flown into neighbors.
 480         s16 mudflow_minpos = -max_spread_amount + 1;
 481         s16 mudflow_maxpos = central_area_size.X + max_spread_amount - 2;
 482
 483         // Loop this part, it will make stuff look older and newer nicely
 484         const u32 age_loops = 2;
 485         for (u32 i_age = 0; i_age < age_loops; i_age++) { // Aging loop
 486                 // Make caves (this code is relatively horrible)
 487                 if (flags & MG_CAVES)
 488                         generateCaves(stone_surface_max_y);
 489
 490                 // Add mud to the central chunk
 491                 addMud();
 492
 493                 // Add blobs of dirt and gravel underground
 494                 addDirtGravelBlobs();
 495
 496                 // Flow mud away from steep edges
 497                 if (spflags & MGV6_MUDFLOW)
 498                         flowMud(mudflow_minpos, mudflow_maxpos);
 499
 500         }
 501
 502         // Add dungeons
 503         if ((flags & MG_DUNGEONS) && (stone_surface_max_y >= node_min.Y)) {
 504                 DungeonParams dp;
 505
 506                 dp.np_rarity  = nparams_dungeon_rarity;
 507                 dp.np_density = nparams_dungeon_density;
 508                 dp.np_wetness = nparams_dungeon_wetness;
 509                 dp.c_water = c_water_source;
 510                 if (getBiome(0, v2s16(node_min.X, node_min.Z)) == BT_NORMAL) {
 511                         dp.c_cobble  = c_cobble;
 512                         dp.c_moss    = c_mossycobble;
 513                         dp.c_stair   = c_stair_cobble;
 514
 515                         dp.diagonal_dirs = false;
 516                         dp.mossratio  = 3.0;
 517                         dp.holesize   = v3s16(1, 2, 1);
 518                         dp.roomsize   = v3s16(0, 0, 0);
 519                         dp.notifytype = GENNOTIFY_DUNGEON;
 520                 } else {
 521                         dp.c_cobble  = c_sandbrick;
 522                         dp.c_moss    = c_sandbrick; // should make this 'cracked sandstone' later
 523                         dp.c_stair   = c_stair_sandstone;
 524
 525                         dp.diagonal_dirs = true;
 526                         dp.mossratio  = 0.0;
 527                         dp.holesize   = v3s16(2, 3, 2);
 528                         dp.roomsize   = v3s16(2, 5, 2);
 529                         dp.notifytype = GENNOTIFY_TEMPLE;
 530                 }
 531
 532                 DungeonGen dgen(this, &dp);
 533                 dgen.generate(blockseed, full_node_min, full_node_max);
 534         }
 535
 536         // Add top and bottom side of water to transforming_liquid queue
 537         //updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 538
 539         // Grow grass
 540         growGrass();
 541
 542         // Generate some trees, and add grass, if a jungle
 543         if (flags & MG_TREES)
 544                 placeTreesAndJungleGrass();
 545
 546         // Generate the registered decorations
 547         m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
 548
 549         // Generate the registered ores
 550         m_emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
 551
 552         // Calculate lighting
 553         if (flags & MG_LIGHT)
 554                 calcLighting(node_min, node_max);
 555
 556         this->generating = false;
 557 }
 558
 559
 560 void MapgenV6::calculateNoise()
 561 {
 562         int x = node_min.X;
 563         int z = node_min.Z;
 564
 565         if (!(flags & MG_FLAT)) {
 566                 noise_terrain_base->perlinMap2D_PO(x, 0.5, z, 0.5);
 567                 noise_terrain_higher->perlinMap2D_PO(x, 0.5, z, 0.5);
 568                 noise_steepness->perlinMap2D_PO(x, 0.5, z, 0.5);
 569                 noise_height_select->perlinMap2D_PO(x, 0.5, z, 0.5);
 570                 noise_mud->perlinMap2D_PO(x, 0.5, z, 0.5);
 571         }
 572
 573         noise_beach->perlinMap2D_PO(x, 0.2, z, 0.7);
 574         noise_biome->perlinMap2D_PO(x, 0.6, z, 0.2);
 575 }
 576
 577
 578 int MapgenV6::generateGround()
 579 {
 580         //TimeTaker timer1("Generating ground level");
 581         MapNode n_air(CONTENT_AIR), n_water_source(c_water_source);
 582         MapNode n_stone(c_stone), n_desert_stone(c_desert_stone);
 583         int stone_surface_max_y = -MAP_GENERATION_LIMIT;
 584         u32 index = 0;
 585
 586         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 587         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 588                 // Surface height
 589                 s16 surface_y = (s16)baseTerrainLevelFromMap(index);
 590
 591                 // Log it
 592                 if (surface_y > stone_surface_max_y)
 593                         stone_surface_max_y = surface_y;
 594
 595                 BiomeV6Type bt = getBiome(index, v2s16(x, z));
 596
 597                 // Fill ground with stone
 598                 v3s16 em = vm->m_area.getExtent();
 599                 u32 i = vm->m_area.index(x, node_min.Y, z);
 600                 for (s16 y = node_min.Y; y <= node_max.Y; y++) {
 601                         if (vm->m_data[i].getContent() == CONTENT_IGNORE) {
 602                                 if (y <= surface_y) {
 603                                         vm->m_data[i] = (y > water_level && bt == BT_DESERT) ?
 604                                                 n_desert_stone : n_stone;
 605                                 } else if (y <= water_level) {
 606                                         vm->m_data[i] = n_water_source;
 607                                 } else {
 608                                         vm->m_data[i] = n_air;
 609                                 }
 610                         }
 611                         vm->m_area.add_y(em, i, 1);
 612                 }
 613         }
 614
 615         return stone_surface_max_y;
 616 }
 617
 618
 619 void MapgenV6::addMud()
 620 {
 621         // 15ms @cs=8
 622         //TimeTaker timer1("add mud");
 623         MapNode n_dirt(c_dirt), n_gravel(c_gravel);
 624         MapNode n_sand(c_sand), n_desert_sand(c_desert_sand);
 625         MapNode addnode;
 626
 627         u32 index = 0;
 628         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 629         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 630                 // Randomize mud amount
 631                 s16 mud_add_amount = getMudAmount(index) / 2.0 + 0.5;
 632
 633                 // Find ground level
 634                 s16 surface_y = find_stone_level(v2s16(x, z)); /////////////////optimize this!
 635
 636                 // Handle area not found
 637                 if (surface_y == vm->m_area.MinEdge.Y - 1)
 638                         continue;
 639
 640                 BiomeV6Type bt = getBiome(index, v2s16(x, z));
 641                 addnode = (bt == BT_DESERT) ? n_desert_sand : n_dirt;
 642
 643                 if (bt == BT_DESERT && surface_y + mud_add_amount <= water_level + 1) {
 644                         addnode = n_sand;
 645                 } else if (mud_add_amount <= 0) {
 646                         mud_add_amount = 1 - mud_add_amount;
 647                         addnode = n_gravel;
 648                 } else if (bt == BT_NORMAL && getHaveBeach(index) &&
 649                                 surface_y + mud_add_amount <= water_level + 2) {
 650                         addnode = n_sand;
 651                 }
 652
 653                 if (bt == BT_DESERT && surface_y > 20)
 654                         mud_add_amount = MYMAX(0, mud_add_amount - (surface_y - 20) / 5);
 655
 656                 // If topmost node is grass, change it to mud.  It might be if it was
 657                 // flown to there from a neighboring chunk and then converted.
 658                 u32 i = vm->m_area.index(x, surface_y, z);
 659                 if (vm->m_data[i].getContent() == c_dirt_with_grass)
 660                         vm->m_data[i] = n_dirt;
 661
 662                 // Add mud on ground
 663                 s16 mudcount = 0;
 664                 v3s16 em = vm->m_area.getExtent();
 665                 s16 y_start = surface_y + 1;
 666                 i = vm->m_area.index(x, y_start, z);
 667                 for (s16 y = y_start; y <= node_max.Y; y++) {
 668                         if (mudcount >= mud_add_amount)
 669                                 break;
 670
 671                         vm->m_data[i] = addnode;
 672                         mudcount++;
 673
 674                         vm->m_area.add_y(em, i, 1);
 675                 }
 676         }
 677 }
 678
 679
 680 void MapgenV6::flowMud(s16 &mudflow_minpos, s16 &mudflow_maxpos)
 681 {
 682         // 340ms @cs=8
 683         TimeTaker timer1("flow mud");
 684
 685         // Iterate a few times
 686         for(s16 k = 0; k < 3; k++) {
 687                 for (s16 z = mudflow_minpos; z <= mudflow_maxpos; z++)
 688                 for (s16 x = mudflow_minpos; x <= mudflow_maxpos; x++) {
 689                         // Invert coordinates every 2nd iteration
 690                         if (k % 2 == 0) {
 691                                 x = mudflow_maxpos - (x - mudflow_minpos);
 692                                 z = mudflow_maxpos - (z - mudflow_minpos);
 693                         }
 694
 695                         // Node position in 2d
 696                         v2s16 p2d = v2s16(node_min.X, node_min.Z) + v2s16(x, z);
 697
 698                         v3s16 em = vm->m_area.getExtent();
 699                         u32 i = vm->m_area.index(p2d.X, node_max.Y, p2d.Y);
 700                         s16 y = node_max.Y;
 701
 702                         while(y >= node_min.Y)
 703                         {
 704
 705                         for(;; y--)
 706                         {
 707                                 MapNode *n = NULL;
 708                                 // Find mud
 709                                 for(; y >= node_min.Y; y--) {
 710                                         n = &vm->m_data[i];
 711                                         if (n->getContent() == c_dirt ||
 712                                                 n->getContent() == c_dirt_with_grass ||
 713                                                 n->getContent() == c_gravel)
 714                                                 break;
 715
 716                                         vm->m_area.add_y(em, i, -1);
 717                                 }
 718
 719                                 // Stop if out of area
 720                                 //if(vmanip.m_area.contains(i) == false)
 721                                 if (y < node_min.Y)
 722                                         break;
 723
 724                                 if (n->getContent() == c_dirt ||
 725                                         n->getContent() == c_dirt_with_grass)
 726                                 {
 727                                         // Make it exactly mud
 728                                         n->setContent(c_dirt);
 729
 730                                         // Don't flow it if the stuff under it is not mud
 731                                         {
 732                                                 u32 i2 = i;
 733                                                 vm->m_area.add_y(em, i2, -1);
 734                                                 // Cancel if out of area
 735                                                 if(vm->m_area.contains(i2) == false)
 736                                                         continue;
 737                                                 MapNode *n2 = &vm->m_data[i2];
 738                                                 if (n2->getContent() != c_dirt &&
 739                                                         n2->getContent() != c_dirt_with_grass)
 740                                                         continue;
 741                                         }
 742                                 }
 743
 744                                 v3s16 dirs4[4] = {
 745                                         v3s16(0,0,1), // back
 746                                         v3s16(1,0,0), // right
 747                                         v3s16(0,0,-1), // front
 748                                         v3s16(-1,0,0), // left
 749                                 };
 750
 751                                 // Check that upper is air or doesn't exist.
 752                                 // Cancel dropping if upper keeps it in place
 753                                 u32 i3 = i;
 754                                 vm->m_area.add_y(em, i3, 1);
 755                                 if (vm->m_area.contains(i3) == true &&
 756                                         ndef->get(vm->m_data[i3]).walkable)
 757                                         continue;
 758
 759                                 // Drop mud on side
 760                                 for(u32 di=0; di<4; di++) {
 761                                         v3s16 dirp = dirs4[di];
 762                                         u32 i2 = i;
 763                                         // Move to side
 764                                         vm->m_area.add_p(em, i2, dirp);
 765                                         // Fail if out of area
 766                                         if (vm->m_area.contains(i2) == false)
 767                                                 continue;
 768                                         // Check that side is air
 769                                         MapNode *n2 = &vm->m_data[i2];
 770                                         if (ndef->get(*n2).walkable)
 771                                                 continue;
 772                                         // Check that under side is air
 773                                         vm->m_area.add_y(em, i2, -1);
 774                                         if (vm->m_area.contains(i2) == false)
 775                                                 continue;
 776                                         n2 = &vm->m_data[i2];
 777                                         if (ndef->get(*n2).walkable)
 778                                                 continue;
 779                                         // Loop further down until not air
 780                                         bool dropped_to_unknown = false;
 781                                         do {
 782                                                 vm->m_area.add_y(em, i2, -1);
 783                                                 n2 = &vm->m_data[i2];
 784                                                 // if out of known area
 785                                                 if(vm->m_area.contains(i2) == false ||
 786                                                         n2->getContent() == CONTENT_IGNORE) {
 787                                                         dropped_to_unknown = true;
 788                                                         break;
 789                                                 }
 790                                         } while (ndef->get(*n2).walkable == false);
 791                                         // Loop one up so that we're in air
 792                                         vm->m_area.add_y(em, i2, 1);
 793                                         n2 = &vm->m_data[i2];
 794
 795                                         bool old_is_water = (n->getContent() == c_water_source);
 796                                         // Move mud to new place
 797                                         if (!dropped_to_unknown) {
 798                                                 *n2 = *n;
 799                                                 // Set old place to be air (or water)
 800                                                 if(old_is_water)
 801                                                         *n = MapNode(c_water_source);
 802                                                 else
 803                                                         *n = MapNode(CONTENT_AIR);
 804                                         }
 805
 806                                         // Done
 807                                         break;
 808                                 }
 809                         }
 810                         }
 811                 }
 812         }
 813 }
 814
 815
 816 void MapgenV6::addDirtGravelBlobs()
 817 {
 818         if (getBiome(v2s16(node_min.X, node_min.Z)) != BT_NORMAL)
 819                 return;
 820
 821         PseudoRandom pr(blockseed + 983);
 822         for (int i = 0; i < volume_nodes/10/10/10; i++) {
 823                 bool only_fill_cave = (myrand_range(0,1) != 0);
 824                 v3s16 size(
 825                         pr.range(1, 8),
 826                         pr.range(1, 8),
 827                         pr.range(1, 8)
 828                 );
 829                 v3s16 p0(
 830                         pr.range(node_min.X, node_max.X) - size.X / 2,
 831                         pr.range(node_min.Y, node_max.Y) - size.Y / 2,
 832                         pr.range(node_min.Z, node_max.Z) - size.Z / 2
 833                 );
 834
 835                 MapNode n1((p0.Y > -32 && !pr.range(0, 1)) ? c_dirt : c_gravel);
 836                 for (int z1 = 0; z1 < size.Z; z1++)
 837                 for (int y1 = 0; y1 < size.Y; y1++)
 838                 for (int x1 = 0; x1 < size.X; x1++) {
 839                         v3s16 p = p0 + v3s16(x1, y1, z1);
 840                         u32 i = vm->m_area.index(p);
 841                         if (!vm->m_area.contains(i))
 842                                 continue;
 843                         // Cancel if not stone and not cave air
 844                         if (vm->m_data[i].getContent() != c_stone &&
 845                                 !(vm->m_flags[i] & VMANIP_FLAG_CAVE))
 846                                 continue;
 847                         if (only_fill_cave && !(vm->m_flags[i] & VMANIP_FLAG_CAVE))
 848                                 continue;
 849                         vm->m_data[i] = n1;
 850                 }
 851         }
 852 }
 853
 854
 855 void MapgenV6::placeTreesAndJungleGrass()
 856 {
 857         //TimeTaker t("placeTrees");
 858         if (node_max.Y < water_level)
 859                 return;
 860
 861         PseudoRandom grassrandom(blockseed + 53);
 862         content_t c_junglegrass = ndef->getId("mapgen_junglegrass");
 863         // if we don't have junglegrass, don't place cignore... that's bad
 864         if (c_junglegrass == CONTENT_IGNORE)
 865                 c_junglegrass = CONTENT_AIR;
 866         MapNode n_junglegrass(c_junglegrass);
 867         v3s16 em = vm->m_area.getExtent();
 868
 869         // Divide area into parts
 870         s16 div = 8;
 871         s16 sidelen = central_area_size.X / div;
 872         double area = sidelen * sidelen;
 873
 874         // N.B.  We must add jungle grass first, since tree leaves will
 875         // obstruct the ground, giving us a false ground level
 876         for (s16 z0 = 0; z0 < div; z0++)
 877         for (s16 x0 = 0; x0 < div; x0++) {
 878                 // Center position of part of division
 879                 v2s16 p2d_center(
 880                         node_min.X + sidelen / 2 + sidelen * x0,
 881                         node_min.Z + sidelen / 2 + sidelen * z0
 882                 );
 883                 // Minimum edge of part of division
 884                 v2s16 p2d_min(
 885                         node_min.X + sidelen * x0,
 886                         node_min.Z + sidelen * z0
 887                 );
 888                 // Maximum edge of part of division
 889                 v2s16 p2d_max(
 890                         node_min.X + sidelen + sidelen * x0 - 1,
 891                         node_min.Z + sidelen + sidelen * z0 - 1
 892                 );
 893
 894                 // Amount of trees, jungle area
 895                 u32 tree_count = area * getTreeAmount(p2d_center);
 896
 897                 float humidity;
 898                 bool is_jungle = false;
 899                 if (spflags & MGV6_JUNGLES) {
 900                         humidity = getHumidity(p2d_center);
 901                         if (humidity > 0.75) {
 902                                 is_jungle = true;
 903                                 tree_count *= 4;
 904                         }
 905                 }
 906
 907                 // Add jungle grass
 908                 if (is_jungle) {
 909                         u32 grass_count = 5 * humidity * tree_count;
 910                         for (u32 i = 0; i < grass_count; i++) {
 911                                 s16 x = grassrandom.range(p2d_min.X, p2d_max.X);
 912                                 s16 z = grassrandom.range(p2d_min.Y, p2d_max.Y);
 913
 914                                 s16 y = findGroundLevelFull(v2s16(x, z)); ////////////////optimize this!
 915                                 if (y < water_level || y < node_min.Y || y > node_max.Y)
 916                                         continue;
 917
 918                                 u32 vi = vm->m_area.index(x, y, z);
 919                                 // place on dirt_with_grass, since we know it is exposed to sunlight
 920                                 if (vm->m_data[vi].getContent() == c_dirt_with_grass) {
 921                                         vm->m_area.add_y(em, vi, 1);
 922                                         vm->m_data[vi] = n_junglegrass;
 923                                 }
 924                         }
 925                 }
 926
 927                 // Put trees in random places on part of division
 928                 for (u32 i = 0; i < tree_count; i++) {
 929                         s16 x = myrand_range(p2d_min.X, p2d_max.X);
 930                         s16 z = myrand_range(p2d_min.Y, p2d_max.Y);
 931                         s16 y = findGroundLevelFull(v2s16(x, z)); ////////////////////optimize this!
 932                         // Don't make a tree under water level
 933                         // Don't make a tree so high that it doesn't fit
 934                         if(y < water_level || y > node_max.Y - 6)
 935                                 continue;
 936
 937                         v3s16 p(x,y,z);
 938                         // Trees grow only on mud and grass
 939                         {
 940                                 u32 i = vm->m_area.index(p);
 941                                 MapNode *n = &vm->m_data[i];
 942                                 if (n->getContent() != c_dirt &&
 943                                         n->getContent() != c_dirt_with_grass)
 944                                         continue;
 945                         }
 946                         p.Y++;
 947
 948                         // Make a tree
 949                         if (is_jungle) {
 950                                 treegen::make_jungletree(*vm, p, ndef, myrand());
 951                         } else {
 952                                 bool is_apple_tree = (myrand_range(0, 3) == 0) &&
 953                                                                                 getHaveAppleTree(v2s16(x, z));
 954                                 treegen::make_tree(*vm, p, is_apple_tree, ndef, myrand());
 955                         }
 956                 }
 957         }
 958         //printf("placeTreesAndJungleGrass: %dms\n", t.stop());
 959 }
 960
 961
 962 void MapgenV6::growGrass()
 963 {
 964         for (s16 z = full_node_min.Z; z <= full_node_max.Z; z++)
 965         for (s16 x = full_node_min.X; x <= full_node_max.X; x++) {
 966                 // Find the lowest surface to which enough light ends up to make
 967                 // grass grow.  Basically just wait until not air and not leaves.
 968                 s16 surface_y = 0;
 969                 {
 970                         v3s16 em = vm->m_area.getExtent();
 971                         u32 i = vm->m_area.index(x, node_max.Y, z);
 972                         s16 y;
 973                         // Go to ground level
 974                         for (y = node_max.Y; y >= full_node_min.Y; y--) {
 975                                 MapNode &n = vm->m_data[i];
 976                                 if (ndef->get(n).param_type != CPT_LIGHT ||
 977                                         ndef->get(n).liquid_type != LIQUID_NONE)
 978                                         break;
 979                                 vm->m_area.add_y(em, i, -1);
 980                         }
 981                         surface_y = (y >= full_node_min.Y) ? y : full_node_min.Y;
 982                 }
 983
 984                 u32 i = vm->m_area.index(x, surface_y, z);
 985                 MapNode *n = &vm->m_data[i];
 986                 if (n->getContent() == c_dirt && surface_y >= water_level - 20)
 987                         n->setContent(c_dirt_with_grass);
 988         }
 989 }
 990
 991
 992 void MapgenV6::generateCaves(int max_stone_y)
 993 {
 994         float cave_amount = NoisePerlin2D(np_cave, node_min.X, node_min.Y, seed);
 995         int volume_nodes = (node_max.X - node_min.X + 1) *
 996                                            (node_max.Y - node_min.Y + 1) * MAP_BLOCKSIZE;
 997         cave_amount = MYMAX(0.0, cave_amount);
 998         u32 caves_count = cave_amount * volume_nodes / 50000;
 999         u32 bruises_count = 1;
1000         PseudoRandom ps(blockseed + 21343);
1001         PseudoRandom ps2(blockseed + 1032);
1002
1003         if (ps.range(1, 6) == 1)
1004                 bruises_count = ps.range(0, ps.range(0, 2));
1005
1006         if (getBiome(v2s16(node_min.X, node_min.Z)) == BT_DESERT) {
1007                 caves_count   /= 3;
1008                 bruises_count /= 3;
1009         }
1010
1011         for (u32 i = 0; i < caves_count + bruises_count; i++) {
1012                 bool large_cave = (i >= caves_count);
1013                 CaveV6 cave(this, &ps, &ps2, large_cave);
1014
1015                 cave.makeCave(node_min, node_max, max_stone_y);
1016         }
1017 }