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         this->generating  = false;
  54         this->id       = mapgenid;
  55         this->emerge   = emerge;
  56
  57         this->seed        = (int)params->seed;
  58         this->water_level = params->water_level;
  59         this->flags       = params->flags;
  60         this->csize       = v3s16(1, 1, 1) * params->chunksize * MAP_BLOCKSIZE;
  61         this->gennotify   = emerge->gennotify;
  62
  63         this->ystride = csize.X; //////fix this
  64
  65         MapgenV6Params *sp = (MapgenV6Params *)params->sparams;
  66
  67         this->spflags     = sp->spflags;
  68         this->freq_desert = sp->freq_desert;
  69         this->freq_beach  = sp->freq_beach;
  70
  71         np_cave        = &sp->np_cave;
  72         np_humidity    = &sp->np_humidity;
  73         np_trees       = &sp->np_trees;
  74         np_apple_trees = &sp->np_apple_trees;
  75
  76         //// Create noise objects
  77         noise_terrain_base   = new Noise(&sp->np_terrain_base,   seed, csize.X, csize.Y);
  78         noise_terrain_higher = new Noise(&sp->np_terrain_higher, seed, csize.X, csize.Y);
  79         noise_steepness      = new Noise(&sp->np_steepness,      seed, csize.X, csize.Y);
  80         noise_height_select  = new Noise(&sp->np_height_select,  seed, csize.X, csize.Y);
  81         noise_mud            = new Noise(&sp->np_mud,            seed, csize.X, csize.Y);
  82         noise_beach          = new Noise(&sp->np_beach,          seed, csize.X, csize.Y);
  83         noise_biome          = new Noise(&sp->np_biome,          seed, csize.X, csize.Y);
  84
  85         //// Resolve nodes to be used
  86         INodeDefManager *ndef = emerge->ndef;
  87
  88         c_stone           = ndef->getId("mapgen_stone");
  89         c_dirt            = ndef->getId("mapgen_dirt");
  90         c_dirt_with_grass = ndef->getId("mapgen_dirt_with_grass");
  91         c_sand            = ndef->getId("mapgen_sand");
  92         c_water_source    = ndef->getId("mapgen_water_source");
  93         c_lava_source     = ndef->getId("mapgen_lava_source");
  94         c_gravel          = ndef->getId("mapgen_gravel");
  95         c_cobble          = ndef->getId("mapgen_cobble");
  96         c_desert_sand     = ndef->getId("mapgen_desert_sand");
  97         c_desert_stone    = ndef->getId("mapgen_desert_stone");
  98         c_mossycobble     = ndef->getId("mapgen_mossycobble");
  99         c_sandbrick       = ndef->getId("mapgen_sandstonebrick");
 100         c_stair_cobble    = ndef->getId("mapgen_stair_cobble");
 101         c_stair_sandstone = ndef->getId("mapgen_stair_sandstone");
 102         if (c_desert_sand == CONTENT_IGNORE)
 103                 c_desert_sand = c_sand;
 104         if (c_desert_stone == CONTENT_IGNORE)
 105                 c_desert_stone = c_stone;
 106         if (c_mossycobble == CONTENT_IGNORE)
 107                 c_mossycobble = c_cobble;
 108         if (c_sandbrick == CONTENT_IGNORE)
 109                 c_sandbrick = c_desert_stone;
 110         if (c_stair_cobble == CONTENT_IGNORE)
 111                 c_stair_cobble = c_cobble;
 112         if (c_stair_sandstone == CONTENT_IGNORE)
 113                 c_stair_sandstone = c_sandbrick;
 114 }
 115
 116
 117 MapgenV6::~MapgenV6() {
 118         delete noise_terrain_base;
 119         delete noise_terrain_higher;
 120         delete noise_steepness;
 121         delete noise_height_select;
 122         delete noise_mud;
 123         delete noise_beach;
 124         delete noise_biome;
 125 }
 126
 127
 128 MapgenV6Params::MapgenV6Params() {
 129         spflags     = MGV6_BIOMEBLEND | MGV6_MUDFLOW;
 130         freq_desert = 0.45;
 131         freq_beach  = 0.15;
 132
 133         np_terrain_base   = NoiseParams(-4,  20.0, v3f(250.0, 250.0, 250.0), 82341,  5, 0.6);
 134         np_terrain_higher = NoiseParams(20,  16.0, v3f(500.0, 500.0, 500.0), 85039,  5, 0.6);
 135         np_steepness      = NoiseParams(0.85,0.5,  v3f(125.0, 125.0, 125.0), -932,   5, 0.7);
 136         np_height_select  = NoiseParams(0.5, 1.0,  v3f(250.0, 250.0, 250.0), 4213,   5, 0.69);
 137         np_mud            = NoiseParams(4,   2.0,  v3f(200.0, 200.0, 200.0), 91013,  3, 0.55);
 138         np_beach          = NoiseParams(0,   1.0,  v3f(250.0, 250.0, 250.0), 59420,  3, 0.50);
 139         np_biome          = NoiseParams(0,   1.0,  v3f(250.0, 250.0, 250.0), 9130,   3, 0.50);
 140         np_cave           = NoiseParams(6,   6.0,  v3f(250.0, 250.0, 250.0), 34329,  3, 0.50);
 141         np_humidity       = NoiseParams(0.5, 0.5,  v3f(500.0, 500.0, 500.0), 72384,  4, 0.66);
 142         np_trees          = NoiseParams(0,   1.0,  v3f(125.0, 125.0, 125.0), 2,      4, 0.66);
 143         np_apple_trees    = NoiseParams(0,   1.0,  v3f(100.0, 100.0, 100.0), 342902, 3, 0.45);
 144 }
 145
 146
 147 void MapgenV6Params::readParams(Settings *settings) {
 148         settings->getFlagStrNoEx("mgv6_spflags", spflags, flagdesc_mapgen_v6);
 149         settings->getFloatNoEx("mgv6_freq_desert", freq_desert);
 150         settings->getFloatNoEx("mgv6_freq_beach",  freq_beach);
 151
 152         settings->getNoiseParams("mgv6_np_terrain_base",   np_terrain_base);
 153         settings->getNoiseParams("mgv6_np_terrain_higher", np_terrain_higher);
 154         settings->getNoiseParams("mgv6_np_steepness",      np_steepness);
 155         settings->getNoiseParams("mgv6_np_height_select",  np_height_select);
 156         settings->getNoiseParams("mgv6_np_mud",            np_mud);
 157         settings->getNoiseParams("mgv6_np_beach",          np_beach);
 158         settings->getNoiseParams("mgv6_np_biome",          np_biome);
 159         settings->getNoiseParams("mgv6_np_cave",           np_cave);
 160         settings->getNoiseParams("mgv6_np_humidity",       np_humidity);
 161         settings->getNoiseParams("mgv6_np_trees",          np_trees);
 162         settings->getNoiseParams("mgv6_np_apple_trees",    np_apple_trees);
 163 }
 164
 165
 166 void MapgenV6Params::writeParams(Settings *settings) {
 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         v3s16 em = vm->m_area.getExtent();
 191         s16 y_nodes_max = vm->m_area.MaxEdge.Y;
 192         s16 y_nodes_min = vm->m_area.MinEdge.Y;
 193         u32 i = vm->m_area.index(p2d.X, y_nodes_max, p2d.Y);
 194         s16 y;
 195
 196         for (y = y_nodes_max; y >= y_nodes_min; y--) {
 197                 MapNode &n = vm->m_data[i];
 198                 content_t c = n.getContent();
 199                 if (c != CONTENT_IGNORE && (
 200                         c == c_stone || c == c_desert_stone))
 201                         break;
 202
 203                 vm->m_area.add_y(em, i, -1);
 204         }
 205         return (y >= y_nodes_min) ? y : y_nodes_min - 1;
 206 }
 207
 208
 209 // Required by mapgen.h
 210 bool MapgenV6::block_is_underground(u64 seed, v3s16 blockpos)
 211 {
 212         /*s16 minimum_groundlevel = (s16)get_sector_minimum_ground_level(
 213                         seed, v2s16(blockpos.X, blockpos.Z));*/
 214         // Nah, this is just a heuristic, just return something
 215         s16 minimum_groundlevel = water_level;
 216
 217         if(blockpos.Y*MAP_BLOCKSIZE + MAP_BLOCKSIZE <= minimum_groundlevel)
 218                 return true;
 219         else
 220                 return false;
 221 }
 222
 223
 224 //////////////////////// Base terrain height functions
 225
 226 float MapgenV6::baseTerrainLevel(float terrain_base, float terrain_higher,
 227                                                                         float steepness, float height_select) {
 228         float base   = 1 + terrain_base;
 229         float higher = 1 + terrain_higher;
 230
 231         // Limit higher ground level to at least base
 232         if(higher < base)
 233                 higher = base;
 234
 235         // Steepness factor of cliffs
 236         float b = steepness;
 237         b = rangelim(b, 0.0, 1000.0);
 238         b = 5 * b * b * b * b * b * b * b;
 239         b = rangelim(b, 0.5, 1000.0);
 240
 241         // Values 1.5...100 give quite horrible looking slopes
 242         if (b > 1.5 && b < 100.0)
 243                 b = (b < 10.0) ? 1.5 : 100.0;
 244
 245         float a_off = -0.20; // Offset to more low
 246         float a = 0.5 + b * (a_off + height_select);
 247         a = rangelim(a, 0.0, 1.0); // Limit
 248
 249         return base * (1.0 - a) + higher * a;
 250 }
 251
 252
 253 float MapgenV6::baseTerrainLevelFromNoise(v2s16 p) {
 254         if (flags & MG_FLAT)
 255                 return water_level;
 256
 257         float terrain_base   = NoisePerlin2DPosOffset(noise_terrain_base->np,
 258                                                         p.X, 0.5, p.Y, 0.5, seed);
 259         float terrain_higher = NoisePerlin2DPosOffset(noise_terrain_higher->np,
 260                                                         p.X, 0.5, p.Y, 0.5, seed);
 261         float steepness      = NoisePerlin2DPosOffset(noise_steepness->np,
 262                                                         p.X, 0.5, p.Y, 0.5, seed);
 263         float height_select  = NoisePerlin2DNoTxfmPosOffset(noise_height_select->np,
 264                                                         p.X, 0.5, p.Y, 0.5, seed);
 265
 266         return baseTerrainLevel(terrain_base, terrain_higher,
 267                                                         steepness,    height_select);
 268 }
 269
 270
 271 float MapgenV6::baseTerrainLevelFromMap(v2s16 p) {
 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         if (flags & MG_FLAT)
 279                 return water_level;
 280
 281         float terrain_base   = noise_terrain_base->result[index];
 282         float terrain_higher = noise_terrain_higher->result[index];
 283         float steepness      = noise_steepness->result[index];
 284         float height_select  = noise_height_select->result[index];
 285
 286         return baseTerrainLevel(terrain_base, terrain_higher,
 287                                                         steepness,    height_select);
 288 }
 289
 290
 291 s16 MapgenV6::find_ground_level_from_noise(u64 seed, v2s16 p2d, s16 precision) {
 292         return baseTerrainLevelFromNoise(p2d) + AVERAGE_MUD_AMOUNT;
 293 }
 294
 295
 296 int MapgenV6::getGroundLevelAtPoint(v2s16 p) {
 297         return baseTerrainLevelFromNoise(p) + AVERAGE_MUD_AMOUNT;
 298 }
 299
 300
 301 //////////////////////// Noise functions
 302
 303 float MapgenV6::getMudAmount(v2s16 p) {
 304         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 305         return getMudAmount(index);
 306 }
 307
 308
 309 bool MapgenV6::getHaveBeach(v2s16 p) {
 310         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 311         return getHaveBeach(index);
 312 }
 313
 314
 315 BiomeType MapgenV6::getBiome(v2s16 p) {
 316         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 317         return getBiome(index, p);
 318 }
 319
 320
 321 float MapgenV6::getHumidity(v2s16 p)
 322 {
 323         /*double noise = noise2d_perlin(
 324                 0.5+(float)p.X/500, 0.5+(float)p.Y/500,
 325                 seed+72384, 4, 0.66);
 326         noise = (noise + 1.0)/2.0;*/
 327
 328         float noise = NoisePerlin2D(np_humidity, p.X, p.Y, seed);
 329
 330         if (noise < 0.0)
 331                 noise = 0.0;
 332         if (noise > 1.0)
 333                 noise = 1.0;
 334         return noise;
 335 }
 336
 337
 338 float MapgenV6::getTreeAmount(v2s16 p)
 339 {
 340         /*double noise = noise2d_perlin(
 341                         0.5+(float)p.X/125, 0.5+(float)p.Y/125,
 342                         seed+2, 4, 0.66);*/
 343
 344         float noise = NoisePerlin2D(np_trees, p.X, p.Y, seed);
 345         float zeroval = -0.39;
 346         if (noise < zeroval)
 347                 return 0;
 348         else
 349                 return 0.04 * (noise-zeroval) / (1.0-zeroval);
 350 }
 351
 352
 353 bool MapgenV6::getHaveAppleTree(v2s16 p)
 354 {
 355         /*is_apple_tree = noise2d_perlin(
 356                 0.5+(float)p.X/100, 0.5+(float)p.Z/100,
 357                 data->seed+342902, 3, 0.45) > 0.2;*/
 358
 359         float noise = NoisePerlin2D(np_apple_trees, p.X, p.Y, seed);
 360
 361         return noise > 0.2;
 362 }
 363
 364
 365 float MapgenV6::getMudAmount(int index)
 366 {
 367         if (flags & MG_FLAT)
 368                 return AVERAGE_MUD_AMOUNT;
 369
 370         /*return ((float)AVERAGE_MUD_AMOUNT + 2.0 * noise2d_perlin(
 371                         0.5+(float)p.X/200, 0.5+(float)p.Y/200,
 372                         seed+91013, 3, 0.55));*/
 373
 374         return noise_mud->result[index];
 375 }
 376
 377
 378 bool MapgenV6::getHaveBeach(int index)
 379 {
 380         // Determine whether to have sand here
 381         /*double sandnoise = noise2d_perlin(
 382                         0.2+(float)p2d.X/250, 0.7+(float)p2d.Y/250,
 383                         seed+59420, 3, 0.50);*/
 384
 385         float sandnoise = noise_beach->result[index];
 386         return (sandnoise > freq_beach);
 387 }
 388
 389
 390 BiomeType MapgenV6::getBiome(int index, v2s16 p)
 391 {
 392         // Just do something very simple as for now
 393         /*double d = noise2d_perlin(
 394                         0.6+(float)p2d.X/250, 0.2+(float)p2d.Y/250,
 395                         seed+9130, 3, 0.50);*/
 396
 397         float d = noise_biome->result[index];
 398         if (d > freq_desert)
 399                 return BT_DESERT;
 400
 401         if ((spflags & MGV6_BIOMEBLEND) &&
 402                 (d > freq_desert - 0.10) &&
 403                 ((noise2d(p.X, p.Y, seed) + 1.0) > (freq_desert - d) * 20.0))
 404                 return BT_DESERT;
 405
 406         return BT_NORMAL;
 407 }
 408
 409
 410 u32 MapgenV6::get_blockseed(u64 seed, v3s16 p)
 411 {
 412         s32 x=p.X, y=p.Y, z=p.Z;
 413         return (u32)(seed%0x100000000ULL) + z*38134234 + y*42123 + x*23;
 414 }
 415
 416
 417 //////////////////////// Map generator
 418
 419 void MapgenV6::makeChunk(BlockMakeData *data) {
 420         assert(data->vmanip);
 421         assert(data->nodedef);
 422         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 423                    data->blockpos_requested.Y >= data->blockpos_min.Y &&
 424                    data->blockpos_requested.Z >= data->blockpos_min.Z);
 425         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 426                    data->blockpos_requested.Y <= data->blockpos_max.Y &&
 427                    data->blockpos_requested.Z <= data->blockpos_max.Z);
 428
 429         this->generating = true;
 430         this->vm   = data->vmanip;
 431         this->ndef = data->nodedef;
 432
 433         // Hack: use minimum block coords for old code that assumes a single block
 434         v3s16 blockpos = data->blockpos_requested;
 435         v3s16 blockpos_min = data->blockpos_min;
 436         v3s16 blockpos_max = data->blockpos_max;
 437
 438         // Area of central chunk
 439         node_min = blockpos_min*MAP_BLOCKSIZE;
 440         node_max = (blockpos_max+v3s16(1,1,1))*MAP_BLOCKSIZE-v3s16(1,1,1);
 441
 442         // Full allocated area
 443         full_node_min = (blockpos_min-1)*MAP_BLOCKSIZE;
 444         full_node_max = (blockpos_max+2)*MAP_BLOCKSIZE-v3s16(1,1,1);
 445
 446         central_area_size = node_max - node_min + v3s16(1,1,1);
 447         assert(central_area_size.X == central_area_size.Z);
 448
 449         int volume_blocks = (blockpos_max.X - blockpos_min.X + 1)
 450                                           * (blockpos_max.Y - blockpos_min.Y + 1)
 451                                           * (blockpos_max.Z - blockpos_max.Z + 1);
 452
 453         volume_nodes = volume_blocks *
 454                 MAP_BLOCKSIZE * MAP_BLOCKSIZE * MAP_BLOCKSIZE;
 455
 456         // Create a block-specific seed
 457         blockseed = get_blockseed(data->seed, full_node_min);
 458
 459         // Make some noise
 460         calculateNoise();
 461
 462         // Maximum height of the stone surface and obstacles.
 463         // This is used to guide the cave generation
 464         s16 stone_surface_max_y;
 465
 466         // Generate general ground level to full area
 467         stone_surface_max_y = generateGround();
 468
 469         generateExperimental();
 470
 471         const s16 max_spread_amount = MAP_BLOCKSIZE;
 472         // Limit dirt flow area by 1 because mud is flown into neighbors.
 473         s16 mudflow_minpos = -max_spread_amount + 1;
 474         s16 mudflow_maxpos = central_area_size.X + max_spread_amount - 2;
 475
 476         // Loop this part, it will make stuff look older and newer nicely
 477         const u32 age_loops = 2;
 478         for (u32 i_age = 0; i_age < age_loops; i_age++) { // Aging loop
 479                 // Make caves (this code is relatively horrible)
 480                 if (flags & MG_CAVES)
 481                         generateCaves(stone_surface_max_y);
 482
 483                 // Add mud to the central chunk
 484                 addMud();
 485
 486                 // Add blobs of dirt and gravel underground
 487                 addDirtGravelBlobs();
 488
 489                 // Flow mud away from steep edges
 490                 if (spflags & MGV6_MUDFLOW)
 491                         flowMud(mudflow_minpos, mudflow_maxpos);
 492
 493         }
 494
 495         // Add dungeons
 496         if (flags & MG_DUNGEONS) {
 497                 DungeonParams dp;
 498
 499                 dp.np_rarity  = nparams_dungeon_rarity;
 500                 dp.np_density = nparams_dungeon_density;
 501                 dp.np_wetness = nparams_dungeon_wetness;
 502                 dp.c_water = c_water_source;
 503                 if (getBiome(0, v2s16(node_min.X, node_min.Z)) == BT_NORMAL) {
 504                         dp.c_cobble  = c_cobble;
 505                         dp.c_moss    = c_mossycobble;
 506                         dp.c_stair   = c_stair_cobble;
 507
 508                         dp.diagonal_dirs = false;
 509                         dp.mossratio  = 3.0;
 510                         dp.holesize   = v3s16(1, 2, 1);
 511                         dp.roomsize   = v3s16(0, 0, 0);
 512                         dp.notifytype = GENNOTIFY_DUNGEON;
 513                 } else {
 514                         dp.c_cobble  = c_sandbrick;
 515                         dp.c_moss    = c_sandbrick; // should make this 'cracked sandstone' later
 516                         dp.c_stair   = c_stair_sandstone;
 517
 518                         dp.diagonal_dirs = true;
 519                         dp.mossratio  = 0.0;
 520                         dp.holesize   = v3s16(2, 3, 2);
 521                         dp.roomsize   = v3s16(2, 5, 2);
 522                         dp.notifytype = GENNOTIFY_TEMPLE;
 523                 }
 524
 525                 DungeonGen dgen(this, &dp);
 526                 dgen.generate(blockseed, full_node_min, full_node_max);
 527         }
 528
 529         // Add top and bottom side of water to transforming_liquid queue
 530         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 531
 532         // Grow grass
 533         growGrass();
 534
 535         // Generate some trees, and add grass, if a jungle
 536         if (flags & MG_TREES)
 537                 placeTreesAndJungleGrass();
 538
 539         // Generate the registered decorations
 540         for (unsigned int i = 0; i != emerge->decorations.size(); i++) {
 541                 Decoration *deco = emerge->decorations[i];
 542                 deco->placeDeco(this, blockseed + i, node_min, node_max);
 543         }
 544
 545         // Generate the registered ores
 546         for (unsigned int i = 0; i != emerge->ores.size(); i++) {
 547                 Ore *ore = emerge->ores[i];
 548                 ore->placeOre(this, blockseed + i, node_min, node_max);
 549         }
 550
 551         // Calculate lighting
 552         if (flags & MG_LIGHT)
 553                 calcLighting(node_min - v3s16(1, 1, 1) * MAP_BLOCKSIZE,
 554                                          node_max + v3s16(1, 0, 1) * MAP_BLOCKSIZE);
 555
 556         this->generating = false;
 557 }
 558
 559
 560 void MapgenV6::calculateNoise() {
 561         int x = node_min.X;
 562         int z = node_min.Z;
 563
 564         // Need to adjust for the original implementation's +.5 offset...
 565         if (!(flags & MG_FLAT)) {
 566                 noise_terrain_base->perlinMap2D(
 567                         x + 0.5 * noise_terrain_base->np->spread.X,
 568                         z + 0.5 * noise_terrain_base->np->spread.Z);
 569                 noise_terrain_base->transformNoiseMap();
 570
 571                 noise_terrain_higher->perlinMap2D(
 572                         x + 0.5 * noise_terrain_higher->np->spread.X,
 573                         z + 0.5 * noise_terrain_higher->np->spread.Z);
 574                 noise_terrain_higher->transformNoiseMap();
 575
 576                 noise_steepness->perlinMap2D(
 577                         x + 0.5 * noise_steepness->np->spread.X,
 578                         z + 0.5 * noise_steepness->np->spread.Z);
 579                 noise_steepness->transformNoiseMap();
 580
 581                 noise_height_select->perlinMap2D(
 582                         x + 0.5 * noise_height_select->np->spread.X,
 583                         z + 0.5 * noise_height_select->np->spread.Z);
 584
 585                 noise_mud->perlinMap2D(
 586                         x + 0.5 * noise_mud->np->spread.X,
 587                         z + 0.5 * noise_mud->np->spread.Z);
 588                 noise_mud->transformNoiseMap();
 589         }
 590
 591         noise_beach->perlinMap2D(
 592                 x + 0.2 * noise_beach->np->spread.X,
 593                 z + 0.7 * noise_beach->np->spread.Z);
 594
 595         noise_biome->perlinMap2D(
 596                 x + 0.6 * noise_biome->np->spread.X,
 597                 z + 0.2 * noise_biome->np->spread.Z);
 598 }
 599
 600
 601 int MapgenV6::generateGround() {
 602         //TimeTaker timer1("Generating ground level");
 603         MapNode n_air(CONTENT_AIR), n_water_source(c_water_source);
 604         MapNode n_stone(c_stone), n_desert_stone(c_desert_stone);
 605         int stone_surface_max_y = -MAP_GENERATION_LIMIT;
 606         u32 index = 0;
 607
 608         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 609         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 610                 // Surface height
 611                 s16 surface_y = (s16)baseTerrainLevelFromMap(index);
 612
 613                 // Log it
 614                 if (surface_y > stone_surface_max_y)
 615                         stone_surface_max_y = surface_y;
 616
 617                 BiomeType bt = getBiome(index, v2s16(x, z));
 618
 619                 // Fill ground with stone
 620                 v3s16 em = vm->m_area.getExtent();
 621                 u32 i = vm->m_area.index(x, node_min.Y, z);
 622                 for (s16 y = node_min.Y; y <= node_max.Y; y++) {
 623                         if (vm->m_data[i].getContent() == CONTENT_IGNORE) {
 624                                 if (y <= surface_y) {
 625                                         vm->m_data[i] = (y > water_level && bt == BT_DESERT) ?
 626                                                 n_desert_stone : n_stone;
 627                                 } else if (y <= water_level) {
 628                                         vm->m_data[i] = n_water_source;
 629                                 } else {
 630                                         vm->m_data[i] = n_air;
 631                                 }
 632                         }
 633                         vm->m_area.add_y(em, i, 1);
 634                 }
 635         }
 636
 637         return stone_surface_max_y;
 638 }
 639
 640
 641 void MapgenV6::addMud() {
 642         // 15ms @cs=8
 643         //TimeTaker timer1("add mud");
 644         MapNode n_dirt(c_dirt), n_gravel(c_gravel);
 645         MapNode n_sand(c_sand), n_desert_sand(c_desert_sand);
 646         MapNode addnode;
 647
 648         u32 index = 0;
 649         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 650         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 651                 // Randomize mud amount
 652                 s16 mud_add_amount = getMudAmount(index) / 2.0 + 0.5;
 653
 654                 // Find ground level
 655                 s16 surface_y = find_stone_level(v2s16(x, z)); /////////////////optimize this!
 656
 657                 // Handle area not found
 658                 if (surface_y == vm->m_area.MinEdge.Y - 1)
 659                         continue;
 660
 661                 BiomeType bt = getBiome(index, v2s16(x, z));
 662                 addnode = (bt == BT_DESERT) ? n_desert_sand : n_dirt;
 663
 664                 if (bt == BT_DESERT && surface_y + mud_add_amount <= water_level + 1) {
 665                         addnode = n_sand;
 666                 } else if (mud_add_amount <= 0) {
 667                         mud_add_amount = 1 - mud_add_amount;
 668                         addnode = n_gravel;
 669                 } else if (bt == BT_NORMAL && getHaveBeach(index) &&
 670                                 surface_y + mud_add_amount <= water_level + 2) {
 671                         addnode = n_sand;
 672                 }
 673
 674                 if (bt == BT_DESERT && surface_y > 20)
 675                         mud_add_amount = MYMAX(0, mud_add_amount - (surface_y - 20) / 5);
 676
 677                 // If topmost node is grass, change it to mud.  It might be if it was
 678                 // flown to there from a neighboring chunk and then converted.
 679                 u32 i = vm->m_area.index(x, surface_y, z);
 680                 if (vm->m_data[i].getContent() == c_dirt_with_grass)
 681                         vm->m_data[i] = n_dirt;
 682
 683                 // Add mud on ground
 684                 s16 mudcount = 0;
 685                 v3s16 em = vm->m_area.getExtent();
 686                 s16 y_start = surface_y + 1;
 687                 i = vm->m_area.index(x, y_start, z);
 688                 for (s16 y = y_start; y <= node_max.Y; y++) {
 689                         if (mudcount >= mud_add_amount)
 690                                 break;
 691
 692                         vm->m_data[i] = addnode;
 693                         mudcount++;
 694
 695                         vm->m_area.add_y(em, i, 1);
 696                 }
 697         }
 698 }
 699
 700
 701 void MapgenV6::flowMud(s16 &mudflow_minpos, s16 &mudflow_maxpos) {
 702         // 340ms @cs=8
 703         TimeTaker timer1("flow mud");
 704
 705         // Iterate a few times
 706         for(s16 k = 0; k < 3; k++) {
 707                 for (s16 z = mudflow_minpos; z <= mudflow_maxpos; z++)
 708                 for (s16 x = mudflow_minpos; x <= mudflow_maxpos; x++) {
 709                         // Invert coordinates every 2nd iteration
 710                         if (k % 2 == 0) {
 711                                 x = mudflow_maxpos - (x - mudflow_minpos);
 712                                 z = mudflow_maxpos - (z - mudflow_minpos);
 713                         }
 714
 715                         // Node position in 2d
 716                         v2s16 p2d = v2s16(node_min.X, node_min.Z) + v2s16(x, z);
 717
 718                         v3s16 em = vm->m_area.getExtent();
 719                         u32 i = vm->m_area.index(p2d.X, node_max.Y, p2d.Y);
 720                         s16 y = node_max.Y;
 721
 722                         while(y >= node_min.Y)
 723                         {
 724
 725                         for(;; y--)
 726                         {
 727                                 MapNode *n = NULL;
 728                                 // Find mud
 729                                 for(; y >= node_min.Y; y--) {
 730                                         n = &vm->m_data[i];
 731                                         if (n->getContent() == c_dirt ||
 732                                                 n->getContent() == c_dirt_with_grass ||
 733                                                 n->getContent() == c_gravel)
 734                                                 break;
 735
 736                                         vm->m_area.add_y(em, i, -1);
 737                                 }
 738
 739                                 // Stop if out of area
 740                                 //if(vmanip.m_area.contains(i) == false)
 741                                 if (y < node_min.Y)
 742                                         break;
 743
 744                                 if (n->getContent() == c_dirt ||
 745                                         n->getContent() == c_dirt_with_grass)
 746                                 {
 747                                         // Make it exactly mud
 748                                         n->setContent(c_dirt);
 749
 750                                         // Don't flow it if the stuff under it is not mud
 751                                         {
 752                                                 u32 i2 = i;
 753                                                 vm->m_area.add_y(em, i2, -1);
 754                                                 // Cancel if out of area
 755                                                 if(vm->m_area.contains(i2) == false)
 756                                                         continue;
 757                                                 MapNode *n2 = &vm->m_data[i2];
 758                                                 if (n2->getContent() != c_dirt &&
 759                                                         n2->getContent() != c_dirt_with_grass)
 760                                                         continue;
 761                                         }
 762                                 }
 763
 764                                 v3s16 dirs4[4] = {
 765                                         v3s16(0,0,1), // back
 766                                         v3s16(1,0,0), // right
 767                                         v3s16(0,0,-1), // front
 768                                         v3s16(-1,0,0), // left
 769                                 };
 770
 771                                 // Check that upper is air or doesn't exist.
 772                                 // Cancel dropping if upper keeps it in place
 773                                 u32 i3 = i;
 774                                 vm->m_area.add_y(em, i3, 1);
 775                                 if (vm->m_area.contains(i3) == true &&
 776                                         ndef->get(vm->m_data[i3]).walkable)
 777                                         continue;
 778
 779                                 // Drop mud on side
 780                                 for(u32 di=0; di<4; di++) {
 781                                         v3s16 dirp = dirs4[di];
 782                                         u32 i2 = i;
 783                                         // Move to side
 784                                         vm->m_area.add_p(em, i2, dirp);
 785                                         // Fail if out of area
 786                                         if (vm->m_area.contains(i2) == false)
 787                                                 continue;
 788                                         // Check that side is air
 789                                         MapNode *n2 = &vm->m_data[i2];
 790                                         if (ndef->get(*n2).walkable)
 791                                                 continue;
 792                                         // Check that under side is air
 793                                         vm->m_area.add_y(em, i2, -1);
 794                                         if (vm->m_area.contains(i2) == false)
 795                                                 continue;
 796                                         n2 = &vm->m_data[i2];
 797                                         if (ndef->get(*n2).walkable)
 798                                                 continue;
 799                                         // Loop further down until not air
 800                                         bool dropped_to_unknown = false;
 801                                         do {
 802                                                 vm->m_area.add_y(em, i2, -1);
 803                                                 n2 = &vm->m_data[i2];
 804                                                 // if out of known area
 805                                                 if(vm->m_area.contains(i2) == false ||
 806                                                         n2->getContent() == CONTENT_IGNORE) {
 807                                                         dropped_to_unknown = true;
 808                                                         break;
 809                                                 }
 810                                         } while (ndef->get(*n2).walkable == false);
 811                                         // Loop one up so that we're in air
 812                                         vm->m_area.add_y(em, i2, 1);
 813                                         n2 = &vm->m_data[i2];
 814
 815                                         bool old_is_water = (n->getContent() == c_water_source);
 816                                         // Move mud to new place
 817                                         if (!dropped_to_unknown) {
 818                                                 *n2 = *n;
 819                                                 // Set old place to be air (or water)
 820                                                 if(old_is_water)
 821                                                         *n = MapNode(c_water_source);
 822                                                 else
 823                                                         *n = MapNode(CONTENT_AIR);
 824                                         }
 825
 826                                         // Done
 827                                         break;
 828                                 }
 829                         }
 830                         }
 831                 }
 832         }
 833 }
 834
 835
 836 void MapgenV6::addDirtGravelBlobs() {
 837         if (getBiome(v2s16(node_min.X, node_min.Z)) != BT_NORMAL)
 838                 return;
 839
 840         PseudoRandom pr(blockseed + 983);
 841         for (int i = 0; i < volume_nodes/10/10/10; i++) {
 842                 bool only_fill_cave = (myrand_range(0,1) != 0);
 843                 v3s16 size(
 844                         pr.range(1, 8),
 845                         pr.range(1, 8),
 846                         pr.range(1, 8)
 847                 );
 848                 v3s16 p0(
 849                         pr.range(node_min.X, node_max.X) - size.X / 2,
 850                         pr.range(node_min.Y, node_max.Y) - size.Y / 2,
 851                         pr.range(node_min.Z, node_max.Z) - size.Z / 2
 852                 );
 853
 854                 MapNode n1((p0.Y > -32 && !pr.range(0, 1)) ? c_dirt : c_gravel);
 855                 for (int z1 = 0; z1 < size.Z; z1++)
 856                 for (int y1 = 0; y1 < size.Y; y1++)
 857                 for (int x1 = 0; x1 < size.X; x1++) {
 858                         v3s16 p = p0 + v3s16(x1, y1, z1);
 859                         u32 i = vm->m_area.index(p);
 860                         if (!vm->m_area.contains(i))
 861                                 continue;
 862                         // Cancel if not stone and not cave air
 863                         if (vm->m_data[i].getContent() != c_stone &&
 864                                 !(vm->m_flags[i] & VMANIP_FLAG_CAVE))
 865                                 continue;
 866                         if (only_fill_cave && !(vm->m_flags[i] & VMANIP_FLAG_CAVE))
 867                                 continue;
 868                         vm->m_data[i] = n1;
 869                 }
 870         }
 871 }
 872
 873
 874 void MapgenV6::placeTreesAndJungleGrass() {
 875         //TimeTaker t("placeTrees");
 876         if (node_max.Y < water_level)
 877                 return;
 878
 879         PseudoRandom grassrandom(blockseed + 53);
 880         content_t c_junglegrass = ndef->getId("mapgen_junglegrass");
 881         // if we don't have junglegrass, don't place cignore... that's bad
 882         if (c_junglegrass == CONTENT_IGNORE)
 883                 c_junglegrass = CONTENT_AIR;
 884         MapNode n_junglegrass(c_junglegrass);
 885         v3s16 em = vm->m_area.getExtent();
 886
 887         // Divide area into parts
 888         s16 div = 8;
 889         s16 sidelen = central_area_size.X / div;
 890         double area = sidelen * sidelen;
 891
 892         // N.B.  We must add jungle grass first, since tree leaves will
 893         // obstruct the ground, giving us a false ground level
 894         for (s16 z0 = 0; z0 < div; z0++)
 895         for (s16 x0 = 0; x0 < div; x0++) {
 896                 // Center position of part of division
 897                 v2s16 p2d_center(
 898                         node_min.X + sidelen / 2 + sidelen * x0,
 899                         node_min.Z + sidelen / 2 + sidelen * z0
 900                 );
 901                 // Minimum edge of part of division
 902                 v2s16 p2d_min(
 903                         node_min.X + sidelen * x0,
 904                         node_min.Z + sidelen * z0
 905                 );
 906                 // Maximum edge of part of division
 907                 v2s16 p2d_max(
 908                         node_min.X + sidelen + sidelen * x0 - 1,
 909                         node_min.Z + sidelen + sidelen * z0 - 1
 910                 );
 911
 912                 // Amount of trees, jungle area
 913                 u32 tree_count = area * getTreeAmount(p2d_center);
 914
 915                 float humidity;
 916                 bool is_jungle = false;
 917                 if (spflags & MGV6_JUNGLES) {
 918                         humidity = getHumidity(p2d_center);
 919                         if (humidity > 0.75) {
 920                                 is_jungle = true;
 921                                 tree_count *= 4;
 922                         }
 923                 }
 924
 925                 // Add jungle grass
 926                 if (is_jungle) {
 927                         u32 grass_count = 5 * humidity * tree_count;
 928                         for (u32 i = 0; i < grass_count; i++) {
 929                                 s16 x = grassrandom.range(p2d_min.X, p2d_max.X);
 930                                 s16 z = grassrandom.range(p2d_min.Y, p2d_max.Y);
 931
 932                                 s16 y = findGroundLevelFull(v2s16(x, z)); ////////////////optimize this!
 933                                 if (y < water_level || y < node_min.Y || y > node_max.Y)
 934                                         continue;
 935
 936                                 u32 vi = vm->m_area.index(x, y, z);
 937                                 // place on dirt_with_grass, since we know it is exposed to sunlight
 938                                 if (vm->m_data[vi].getContent() == c_dirt_with_grass) {
 939                                         vm->m_area.add_y(em, vi, 1);
 940                                         vm->m_data[vi] = n_junglegrass;
 941                                 }
 942                         }
 943                 }
 944
 945                 // Put trees in random places on part of division
 946                 for (u32 i = 0; i < tree_count; i++) {
 947                         s16 x = myrand_range(p2d_min.X, p2d_max.X);
 948                         s16 z = myrand_range(p2d_min.Y, p2d_max.Y);
 949                         s16 y = findGroundLevelFull(v2s16(x, z)); ////////////////////optimize this!
 950                         // Don't make a tree under water level
 951                         // Don't make a tree so high that it doesn't fit
 952                         if(y < water_level || y > node_max.Y - 6)
 953                                 continue;
 954
 955                         v3s16 p(x,y,z);
 956                         // Trees grow only on mud and grass
 957                         {
 958                                 u32 i = vm->m_area.index(p);
 959                                 MapNode *n = &vm->m_data[i];
 960                                 if (n->getContent() != c_dirt &&
 961                                         n->getContent() != c_dirt_with_grass)
 962                                         continue;
 963                         }
 964                         p.Y++;
 965
 966                         // Make a tree
 967                         if (is_jungle) {
 968                                 treegen::make_jungletree(*vm, p, ndef, myrand());
 969                         } else {
 970                                 bool is_apple_tree = (myrand_range(0, 3) == 0) &&
 971                                                                                 getHaveAppleTree(v2s16(x, z));
 972                                 treegen::make_tree(*vm, p, is_apple_tree, ndef, myrand());
 973                         }
 974                 }
 975         }
 976         //printf("placeTreesAndJungleGrass: %dms\n", t.stop());
 977 }
 978
 979
 980 void MapgenV6::growGrass() {
 981         for (s16 z = full_node_min.Z; z <= full_node_max.Z; z++)
 982         for (s16 x = full_node_min.X; x <= full_node_max.X; x++) {
 983                 // Find the lowest surface to which enough light ends up to make
 984                 // grass grow.  Basically just wait until not air and not leaves.
 985                 s16 surface_y = 0;
 986                 {
 987                         v3s16 em = vm->m_area.getExtent();
 988                         u32 i = vm->m_area.index(x, node_max.Y, z);
 989                         s16 y;
 990                         // Go to ground level
 991                         for (y = node_max.Y; y >= full_node_min.Y; y--) {
 992                                 MapNode &n = vm->m_data[i];
 993                                 if (ndef->get(n).param_type != CPT_LIGHT ||
 994                                         ndef->get(n).liquid_type != LIQUID_NONE)
 995                                         break;
 996                                 vm->m_area.add_y(em, i, -1);
 997                         }
 998                         surface_y = (y >= full_node_min.Y) ? y : full_node_min.Y;
 999                 }
1000
1001                 u32 i = vm->m_area.index(x, surface_y, z);
1002                 MapNode *n = &vm->m_data[i];
1003                 if (n->getContent() == c_dirt && surface_y >= water_level - 20)
1004                         n->setContent(c_dirt_with_grass);
1005         }
1006 }
1007
1008
1009 void MapgenV6::generateCaves(int max_stone_y) {
1010         float cave_amount = NoisePerlin2D(np_cave, node_min.X, node_min.Y, seed);
1011         int volume_nodes = (node_max.X - node_min.X + 1) *
1012                                            (node_max.Y - node_min.Y + 1) * MAP_BLOCKSIZE;
1013         cave_amount = MYMAX(0.0, cave_amount);
1014         u32 caves_count = cave_amount * volume_nodes / 50000;
1015         u32 bruises_count = 1;
1016         PseudoRandom ps(blockseed + 21343);
1017         PseudoRandom ps2(blockseed + 1032);
1018
1019         if (ps.range(1, 6) == 1)
1020                 bruises_count = ps.range(0, ps.range(0, 2));
1021
1022         if (getBiome(v2s16(node_min.X, node_min.Z)) == BT_DESERT) {
1023                 caves_count   /= 3;
1024                 bruises_count /= 3;
1025         }
1026
1027         for (u32 i = 0; i < caves_count + bruises_count; i++) {
1028                 bool large_cave = (i >= caves_count);
1029                 CaveV6 cave(this, &ps, &ps2, large_cave);
1030
1031                 cave.makeCave(node_min, node_max, max_stone_y);
1032         }
1033 }