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