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 "mapgen_v6.h"
  39
  40 FlagDesc flagdesc_mapgen_v6[] = {
  41         {"jungles",    MGV6_JUNGLES},
  42         {"biomeblend", MGV6_BIOMEBLEND},
  43         {"mudflow",    MGV6_MUDFLOW},
  44         {NULL,         0}
  45 };
  46
  47 ///////////////////////////////////////////////////////////////////////////////
  48
  49
  50 MapgenV6::MapgenV6(int mapgenid, MapgenParams *params, EmergeManager *emerge) {
  51         this->generating  = false;
  52         this->id       = mapgenid;
  53         this->emerge   = emerge;
  54
  55         this->seed        = (int)params->seed;
  56         this->water_level = params->water_level;
  57         this->flags       = params->flags;
  58         this->csize       = v3s16(1, 1, 1) * params->chunksize * MAP_BLOCKSIZE;
  59         this->gennotify   = emerge->gennotify;
  60
  61         this->ystride = csize.X; //////fix this
  62
  63         MapgenV6Params *sp = (MapgenV6Params *)params->sparams;
  64
  65         this->spflags     = sp->spflags;
  66         this->freq_desert = sp->freq_desert;
  67         this->freq_beach  = sp->freq_beach;
  68
  69         np_cave        = &sp->np_cave;
  70         np_humidity    = &sp->np_humidity;
  71         np_trees       = &sp->np_trees;
  72         np_apple_trees = &sp->np_apple_trees;
  73
  74         //// Create noise objects
  75         noise_terrain_base   = new Noise(&sp->np_terrain_base,   seed, csize.X, csize.Y);
  76         noise_terrain_higher = new Noise(&sp->np_terrain_higher, seed, csize.X, csize.Y);
  77         noise_steepness      = new Noise(&sp->np_steepness,      seed, csize.X, csize.Y);
  78         noise_height_select  = new Noise(&sp->np_height_select,  seed, csize.X, csize.Y);
  79         noise_mud            = new Noise(&sp->np_mud,            seed, csize.X, csize.Y);
  80         noise_beach          = new Noise(&sp->np_beach,          seed, csize.X, csize.Y);
  81         noise_biome          = new Noise(&sp->np_biome,          seed, csize.X, csize.Y);
  82
  83         //// Resolve nodes to be used
  84         INodeDefManager *ndef = emerge->ndef;
  85
  86         c_stone           = ndef->getId("mapgen_stone");
  87         c_dirt            = ndef->getId("mapgen_dirt");
  88         c_dirt_with_grass = ndef->getId("mapgen_dirt_with_grass");
  89         c_sand            = ndef->getId("mapgen_sand");
  90         c_water_source    = ndef->getId("mapgen_water_source");
  91         c_lava_source     = ndef->getId("mapgen_lava_source");
  92         c_gravel          = ndef->getId("mapgen_gravel");
  93         c_cobble          = ndef->getId("mapgen_cobble");
  94         c_desert_sand     = ndef->getId("mapgen_desert_sand");
  95         c_desert_stone    = ndef->getId("mapgen_desert_stone");
  96         c_mossycobble     = ndef->getId("mapgen_mossycobble");
  97         c_sandbrick       = ndef->getId("mapgen_sandstonebrick");
  98         c_stair_cobble    = ndef->getId("mapgen_stair_cobble");
  99         c_stair_sandstone = ndef->getId("mapgen_stair_sandstone");
 100         if (c_desert_sand == CONTENT_IGNORE)
 101                 c_desert_sand = c_sand;
 102         if (c_desert_stone == CONTENT_IGNORE)
 103                 c_desert_stone = c_stone;
 104         if (c_mossycobble == CONTENT_IGNORE)
 105                 c_mossycobble = c_cobble;
 106         if (c_sandbrick == CONTENT_IGNORE)
 107                 c_sandbrick = c_desert_stone;
 108         if (c_stair_cobble == CONTENT_IGNORE)
 109                 c_stair_cobble = c_cobble;
 110         if (c_stair_sandstone == CONTENT_IGNORE)
 111                 c_stair_sandstone = c_sandbrick;
 112 }
 113
 114
 115 MapgenV6::~MapgenV6() {
 116         delete noise_terrain_base;
 117         delete noise_terrain_higher;
 118         delete noise_steepness;
 119         delete noise_height_select;
 120         delete noise_mud;
 121         delete noise_beach;
 122         delete noise_biome;
 123 }
 124
 125
 126 MapgenV6Params::MapgenV6Params() {
 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);
 132         np_terrain_higher = NoiseParams(20,  16.0, v3f(500.0, 500.0, 500.0), 85039,  5, 0.6);
 133         np_steepness      = NoiseParams(0.85,0.5,  v3f(125.0, 125.0, 125.0), -932,   5, 0.7);
 134         np_height_select  = NoiseParams(0.5, 1.0,  v3f(250.0, 250.0, 250.0), 4213,   5, 0.69);
 135         np_mud            = NoiseParams(4,   2.0,  v3f(200.0, 200.0, 200.0), 91013,  3, 0.55);
 136         np_beach          = NoiseParams(0,   1.0,  v3f(250.0, 250.0, 250.0), 59420,  3, 0.50);
 137         np_biome          = NoiseParams(0,   1.0,  v3f(250.0, 250.0, 250.0), 9130,   3, 0.50);
 138         np_cave           = NoiseParams(6,   6.0,  v3f(250.0, 250.0, 250.0), 34329,  3, 0.50);
 139         np_humidity       = NoiseParams(0.5, 0.5,  v3f(500.0, 500.0, 500.0), 72384,  4, 0.66);
 140         np_trees          = NoiseParams(0,   1.0,  v3f(125.0, 125.0, 125.0), 2,      4, 0.66);
 141         np_apple_trees    = NoiseParams(0,   1.0,  v3f(100.0, 100.0, 100.0), 342902, 3, 0.45);
 142 }
 143
 144
 145 void MapgenV6Params::readParams(Settings *settings) {
 146         settings->getFlagStrNoEx("mgv6_spflags", spflags, flagdesc_mapgen_v6);
 147         settings->getFloatNoEx("mgv6_freq_desert", freq_desert);
 148         settings->getFloatNoEx("mgv6_freq_beach",  freq_beach);
 149
 150         settings->getNoiseParams("mgv6_np_terrain_base",   np_terrain_base);
 151         settings->getNoiseParams("mgv6_np_terrain_higher", np_terrain_higher);
 152         settings->getNoiseParams("mgv6_np_steepness",      np_steepness);
 153         settings->getNoiseParams("mgv6_np_height_select",  np_height_select);
 154         settings->getNoiseParams("mgv6_np_mud",            np_mud);
 155         settings->getNoiseParams("mgv6_np_beach",          np_beach);
 156         settings->getNoiseParams("mgv6_np_biome",          np_biome);
 157         settings->getNoiseParams("mgv6_np_cave",           np_cave);
 158         settings->getNoiseParams("mgv6_np_humidity",       np_humidity);
 159         settings->getNoiseParams("mgv6_np_trees",          np_trees);
 160         settings->getNoiseParams("mgv6_np_apple_trees",    np_apple_trees);
 161 }
 162
 163
 164 void MapgenV6Params::writeParams(Settings *settings) {
 165         settings->setFlagStr("mgv6_spflags", spflags, flagdesc_mapgen_v6, (u32)-1);
 166         settings->setFloat("mgv6_freq_desert", freq_desert);
 167         settings->setFloat("mgv6_freq_beach",  freq_beach);
 168
 169         settings->setNoiseParams("mgv6_np_terrain_base",   np_terrain_base);
 170         settings->setNoiseParams("mgv6_np_terrain_higher", np_terrain_higher);
 171         settings->setNoiseParams("mgv6_np_steepness",      np_steepness);
 172         settings->setNoiseParams("mgv6_np_height_select",  np_height_select);
 173         settings->setNoiseParams("mgv6_np_mud",            np_mud);
 174         settings->setNoiseParams("mgv6_np_beach",          np_beach);
 175         settings->setNoiseParams("mgv6_np_biome",          np_biome);
 176         settings->setNoiseParams("mgv6_np_cave",           np_cave);
 177         settings->setNoiseParams("mgv6_np_humidity",       np_humidity);
 178         settings->setNoiseParams("mgv6_np_trees",          np_trees);
 179         settings->setNoiseParams("mgv6_np_apple_trees",    np_apple_trees);
 180 }
 181
 182
 183 //////////////////////// Some helper functions for the map generator
 184
 185
 186 // Returns Y one under area minimum if not found
 187 s16 MapgenV6::find_stone_level(v2s16 p2d) {
 188         v3s16 em = vm->m_area.getExtent();
 189         s16 y_nodes_max = vm->m_area.MaxEdge.Y;
 190         s16 y_nodes_min = vm->m_area.MinEdge.Y;
 191         u32 i = vm->m_area.index(p2d.X, y_nodes_max, p2d.Y);
 192         s16 y;
 193
 194         for (y = y_nodes_max; y >= y_nodes_min; y--) {
 195                 MapNode &n = vm->m_data[i];
 196                 content_t c = n.getContent();
 197                 if (c != CONTENT_IGNORE && (
 198                         c == c_stone || c == c_desert_stone))
 199                         break;
 200
 201                 vm->m_area.add_y(em, i, -1);
 202         }
 203         return (y >= y_nodes_min) ? y : y_nodes_min - 1;
 204 }
 205
 206
 207 // Required by mapgen.h
 208 bool MapgenV6::block_is_underground(u64 seed, v3s16 blockpos)
 209 {
 210         /*s16 minimum_groundlevel = (s16)get_sector_minimum_ground_level(
 211                         seed, v2s16(blockpos.X, blockpos.Z));*/
 212         // Nah, this is just a heuristic, just return something
 213         s16 minimum_groundlevel = water_level;
 214
 215         if(blockpos.Y*MAP_BLOCKSIZE + MAP_BLOCKSIZE <= minimum_groundlevel)
 216                 return true;
 217         else
 218                 return false;
 219 }
 220
 221
 222 //////////////////////// Base terrain height functions
 223
 224 float MapgenV6::baseTerrainLevel(float terrain_base, float terrain_higher,
 225                                                                         float steepness, float height_select) {
 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         if (flags & MG_FLAT)
 253                 return water_level;
 254
 255         float terrain_base   = NoisePerlin2DPosOffset(noise_terrain_base->np,
 256                                                         p.X, 0.5, p.Y, 0.5, seed);
 257         float terrain_higher = NoisePerlin2DPosOffset(noise_terrain_higher->np,
 258                                                         p.X, 0.5, p.Y, 0.5, seed);
 259         float steepness      = NoisePerlin2DPosOffset(noise_steepness->np,
 260                                                         p.X, 0.5, p.Y, 0.5, seed);
 261         float height_select  = NoisePerlin2DNoTxfmPosOffset(noise_height_select->np,
 262                                                         p.X, 0.5, p.Y, 0.5, seed);
 263
 264         return baseTerrainLevel(terrain_base, terrain_higher,
 265                                                         steepness,    height_select);
 266 }
 267
 268
 269 float MapgenV6::baseTerrainLevelFromMap(v2s16 p) {
 270         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 271         return baseTerrainLevelFromMap(index);
 272 }
 273
 274
 275 float MapgenV6::baseTerrainLevelFromMap(int index) {
 276         if (flags & MG_FLAT)
 277                 return water_level;
 278
 279         float terrain_base   = noise_terrain_base->result[index];
 280         float terrain_higher = noise_terrain_higher->result[index];
 281         float steepness      = noise_steepness->result[index];
 282         float height_select  = noise_height_select->result[index];
 283
 284         return baseTerrainLevel(terrain_base, terrain_higher,
 285                                                         steepness,    height_select);
 286 }
 287
 288
 289 s16 MapgenV6::find_ground_level_from_noise(u64 seed, v2s16 p2d, s16 precision) {
 290         return baseTerrainLevelFromNoise(p2d) + AVERAGE_MUD_AMOUNT;
 291 }
 292
 293
 294 int MapgenV6::getGroundLevelAtPoint(v2s16 p) {
 295         return baseTerrainLevelFromNoise(p) + AVERAGE_MUD_AMOUNT;
 296 }
 297
 298
 299 //////////////////////// Noise functions
 300
 301 float MapgenV6::getMudAmount(v2s16 p) {
 302         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 303         return getMudAmount(index);
 304 }
 305
 306
 307 bool MapgenV6::getHaveBeach(v2s16 p) {
 308         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 309         return getHaveBeach(index);
 310 }
 311
 312
 313 BiomeType MapgenV6::getBiome(v2s16 p) {
 314         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 315         return getBiome(index, p);
 316 }
 317
 318
 319 float MapgenV6::getHumidity(v2s16 p)
 320 {
 321         /*double noise = noise2d_perlin(
 322                 0.5+(float)p.X/500, 0.5+(float)p.Y/500,
 323                 seed+72384, 4, 0.66);
 324         noise = (noise + 1.0)/2.0;*/
 325
 326         float noise = NoisePerlin2D(np_humidity, p.X, p.Y, seed);
 327
 328         if (noise < 0.0)
 329                 noise = 0.0;
 330         if (noise > 1.0)
 331                 noise = 1.0;
 332         return noise;
 333 }
 334
 335
 336 float MapgenV6::getTreeAmount(v2s16 p)
 337 {
 338         /*double noise = noise2d_perlin(
 339                         0.5+(float)p.X/125, 0.5+(float)p.Y/125,
 340                         seed+2, 4, 0.66);*/
 341
 342         float noise = NoisePerlin2D(np_trees, p.X, p.Y, seed);
 343         float zeroval = -0.39;
 344         if (noise < zeroval)
 345                 return 0;
 346         else
 347                 return 0.04 * (noise-zeroval) / (1.0-zeroval);
 348 }
 349
 350
 351 bool MapgenV6::getHaveAppleTree(v2s16 p)
 352 {
 353         /*is_apple_tree = noise2d_perlin(
 354                 0.5+(float)p.X/100, 0.5+(float)p.Z/100,
 355                 data->seed+342902, 3, 0.45) > 0.2;*/
 356
 357         float noise = NoisePerlin2D(np_apple_trees, p.X, p.Y, seed);
 358
 359         return noise > 0.2;
 360 }
 361
 362
 363 float MapgenV6::getMudAmount(int index)
 364 {
 365         if (flags & MG_FLAT)
 366                 return AVERAGE_MUD_AMOUNT;
 367
 368         /*return ((float)AVERAGE_MUD_AMOUNT + 2.0 * noise2d_perlin(
 369                         0.5+(float)p.X/200, 0.5+(float)p.Y/200,
 370                         seed+91013, 3, 0.55));*/
 371
 372         return noise_mud->result[index];
 373 }
 374
 375
 376 bool MapgenV6::getHaveBeach(int index)
 377 {
 378         // Determine whether to have sand here
 379         /*double sandnoise = noise2d_perlin(
 380                         0.2+(float)p2d.X/250, 0.7+(float)p2d.Y/250,
 381                         seed+59420, 3, 0.50);*/
 382
 383         float sandnoise = noise_beach->result[index];
 384         return (sandnoise > freq_beach);
 385 }
 386
 387
 388 BiomeType MapgenV6::getBiome(int index, v2s16 p)
 389 {
 390         // Just do something very simple as for now
 391         /*double d = noise2d_perlin(
 392                         0.6+(float)p2d.X/250, 0.2+(float)p2d.Y/250,
 393                         seed+9130, 3, 0.50);*/
 394
 395         float d = noise_biome->result[index];
 396         if (d > freq_desert)
 397                 return BT_DESERT;
 398
 399         if ((spflags & MGV6_BIOMEBLEND) &&
 400                 (d > freq_desert - 0.10) &&
 401                 ((noise2d(p.X, p.Y, seed) + 1.0) > (freq_desert - d) * 20.0))
 402                 return BT_DESERT;
 403
 404         return BT_NORMAL;
 405 }
 406
 407
 408 u32 MapgenV6::get_blockseed(u64 seed, v3s16 p)
 409 {
 410         s32 x=p.X, y=p.Y, z=p.Z;
 411         return (u32)(seed%0x100000000ULL) + z*38134234 + y*42123 + x*23;
 412 }
 413
 414
 415 //////////////////////// Map generator
 416
 417 void MapgenV6::makeChunk(BlockMakeData *data) {
 418         assert(data->vmanip);
 419         assert(data->nodedef);
 420         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 421                    data->blockpos_requested.Y >= data->blockpos_min.Y &&
 422                    data->blockpos_requested.Z >= data->blockpos_min.Z);
 423         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 424                    data->blockpos_requested.Y <= data->blockpos_max.Y &&
 425                    data->blockpos_requested.Z <= data->blockpos_max.Z);
 426
 427         this->generating = true;
 428         this->vm   = data->vmanip;
 429         this->ndef = data->nodedef;
 430
 431         // Hack: use minimum block coords for old code that assumes a single block
 432         v3s16 blockpos = data->blockpos_requested;
 433         v3s16 blockpos_min = data->blockpos_min;
 434         v3s16 blockpos_max = data->blockpos_max;
 435
 436         // Area of central chunk
 437         node_min = blockpos_min*MAP_BLOCKSIZE;
 438         node_max = (blockpos_max+v3s16(1,1,1))*MAP_BLOCKSIZE-v3s16(1,1,1);
 439
 440         // Full allocated area
 441         full_node_min = (blockpos_min-1)*MAP_BLOCKSIZE;
 442         full_node_max = (blockpos_max+2)*MAP_BLOCKSIZE-v3s16(1,1,1);
 443
 444         central_area_size = node_max - node_min + v3s16(1,1,1);
 445         assert(central_area_size.X == central_area_size.Z);
 446
 447         int volume_blocks = (blockpos_max.X - blockpos_min.X + 1)
 448                                           * (blockpos_max.Y - blockpos_min.Y + 1)
 449                                           * (blockpos_max.Z - blockpos_max.Z + 1);
 450
 451         volume_nodes = volume_blocks *
 452                 MAP_BLOCKSIZE * MAP_BLOCKSIZE * MAP_BLOCKSIZE;
 453
 454         // Create a block-specific seed
 455         blockseed = get_blockseed(data->seed, full_node_min);
 456
 457         // Make some noise
 458         calculateNoise();
 459
 460         // Maximum height of the stone surface and obstacles.
 461         // This is used to guide the cave generation
 462         s16 stone_surface_max_y;
 463
 464         // Generate general ground level to full area
 465         stone_surface_max_y = generateGround();
 466
 467         generateExperimental();
 468
 469         const s16 max_spread_amount = MAP_BLOCKSIZE;
 470         // Limit dirt flow area by 1 because mud is flown into neighbors.
 471         s16 mudflow_minpos = -max_spread_amount + 1;
 472         s16 mudflow_maxpos = central_area_size.X + max_spread_amount - 2;
 473
 474         // Loop this part, it will make stuff look older and newer nicely
 475         const u32 age_loops = 2;
 476         for (u32 i_age = 0; i_age < age_loops; i_age++) { // Aging loop
 477                 // Make caves (this code is relatively horrible)
 478                 if (flags & MG_CAVES)
 479                         generateCaves(stone_surface_max_y);
 480
 481                 // Add mud to the central chunk
 482                 addMud();
 483
 484                 // Add blobs of dirt and gravel underground
 485                 addDirtGravelBlobs();
 486
 487                 // Flow mud away from steep edges
 488                 if (spflags & MGV6_MUDFLOW)
 489                         flowMud(mudflow_minpos, mudflow_maxpos);
 490
 491         }
 492
 493         // Add dungeons
 494         if (flags & MG_DUNGEONS) {
 495                 DungeonParams dp;
 496
 497                 dp.np_rarity  = nparams_dungeon_rarity;
 498                 dp.np_density = nparams_dungeon_density;
 499                 dp.np_wetness = nparams_dungeon_wetness;
 500                 dp.c_water = c_water_source;
 501                 if (getBiome(0, v2s16(node_min.X, node_min.Z)) == BT_NORMAL) {
 502                         dp.c_cobble  = c_cobble;
 503                         dp.c_moss    = c_mossycobble;
 504                         dp.c_stair   = c_stair_cobble;
 505
 506                         dp.diagonal_dirs = false;
 507                         dp.mossratio  = 3.0;
 508                         dp.holesize   = v3s16(1, 2, 1);
 509                         dp.roomsize   = v3s16(0, 0, 0);
 510                         dp.notifytype = GENNOTIFY_DUNGEON;
 511                 } else {
 512                         dp.c_cobble  = c_sandbrick;
 513                         dp.c_moss    = c_sandbrick; // should make this 'cracked sandstone' later
 514                         dp.c_stair   = c_stair_sandstone;
 515
 516                         dp.diagonal_dirs = true;
 517                         dp.mossratio  = 0.0;
 518                         dp.holesize   = v3s16(2, 3, 2);
 519                         dp.roomsize   = v3s16(2, 5, 2);
 520                         dp.notifytype = GENNOTIFY_TEMPLE;
 521                 }
 522
 523                 DungeonGen dgen(this, &dp);
 524                 dgen.generate(blockseed, full_node_min, full_node_max);
 525         }
 526
 527         // Add top and bottom side of water to transforming_liquid queue
 528         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 529
 530         // Grow grass
 531         growGrass();
 532
 533         // Generate some trees, and add grass, if a jungle
 534         if (flags & MG_TREES)
 535                 placeTreesAndJungleGrass();
 536
 537         // Generate the registered decorations
 538         for (unsigned int i = 0; i != emerge->decorations.size(); i++) {
 539                 Decoration *deco = emerge->decorations[i];
 540                 deco->placeDeco(this, blockseed + i, node_min, node_max);
 541         }
 542
 543         // Generate the registered ores
 544         for (unsigned int i = 0; i != emerge->ores.size(); i++) {
 545                 Ore *ore = emerge->ores[i];
 546                 ore->placeOre(this, blockseed + i, node_min, node_max);
 547         }
 548
 549         // Calculate lighting
 550         if (flags & MG_LIGHT)
 551                 calcLighting(node_min - v3s16(1, 1, 1) * MAP_BLOCKSIZE,
 552                                          node_max + v3s16(1, 0, 1) * MAP_BLOCKSIZE);
 553
 554         this->generating = false;
 555 }
 556
 557
 558 void MapgenV6::calculateNoise() {
 559         int x = node_min.X;
 560         int z = node_min.Z;
 561
 562         // Need to adjust for the original implementation's +.5 offset...
 563         if (!(flags & MG_FLAT)) {
 564                 noise_terrain_base->perlinMap2D(
 565                         x + 0.5 * noise_terrain_base->np->spread.X,
 566                         z + 0.5 * noise_terrain_base->np->spread.Z);
 567                 noise_terrain_base->transformNoiseMap();
 568
 569                 noise_terrain_higher->perlinMap2D(
 570                         x + 0.5 * noise_terrain_higher->np->spread.X,
 571                         z + 0.5 * noise_terrain_higher->np->spread.Z);
 572                 noise_terrain_higher->transformNoiseMap();
 573
 574                 noise_steepness->perlinMap2D(
 575                         x + 0.5 * noise_steepness->np->spread.X,
 576                         z + 0.5 * noise_steepness->np->spread.Z);
 577                 noise_steepness->transformNoiseMap();
 578
 579                 noise_height_select->perlinMap2D(
 580                         x + 0.5 * noise_height_select->np->spread.X,
 581                         z + 0.5 * noise_height_select->np->spread.Z);
 582
 583                 noise_mud->perlinMap2D(
 584                         x + 0.5 * noise_mud->np->spread.X,
 585                         z + 0.5 * noise_mud->np->spread.Z);
 586                 noise_mud->transformNoiseMap();
 587         }
 588
 589         noise_beach->perlinMap2D(
 590                 x + 0.2 * noise_beach->np->spread.X,
 591                 z + 0.7 * noise_beach->np->spread.Z);
 592
 593         noise_biome->perlinMap2D(
 594                 x + 0.6 * noise_biome->np->spread.X,
 595                 z + 0.2 * noise_biome->np->spread.Z);
 596 }
 597
 598
 599 int MapgenV6::generateGround() {
 600         //TimeTaker timer1("Generating ground level");
 601         MapNode n_air(CONTENT_AIR), n_water_source(c_water_source);
 602         MapNode n_stone(c_stone), n_desert_stone(c_desert_stone);
 603         int stone_surface_max_y = -MAP_GENERATION_LIMIT;
 604         u32 index = 0;
 605
 606         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 607         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 608                 // Surface height
 609                 s16 surface_y = (s16)baseTerrainLevelFromMap(index);
 610
 611                 // Log it
 612                 if (surface_y > stone_surface_max_y)
 613                         stone_surface_max_y = surface_y;
 614
 615                 BiomeType bt = getBiome(index, v2s16(x, z));
 616
 617                 // Fill ground with stone
 618                 v3s16 em = vm->m_area.getExtent();
 619                 u32 i = vm->m_area.index(x, node_min.Y, z);
 620                 for (s16 y = node_min.Y; y <= node_max.Y; y++) {
 621                         if (vm->m_data[i].getContent() == CONTENT_IGNORE) {
 622                                 if (y <= surface_y) {
 623                                         vm->m_data[i] = (y > water_level && bt == BT_DESERT) ?
 624                                                 n_desert_stone : n_stone;
 625                                 } else if (y <= water_level) {
 626                                         vm->m_data[i] = n_water_source;
 627                                 } else {
 628                                         vm->m_data[i] = n_air;
 629                                 }
 630                         }
 631                         vm->m_area.add_y(em, i, 1);
 632                 }
 633         }
 634
 635         return stone_surface_max_y;
 636 }
 637
 638
 639 void MapgenV6::addMud() {
 640         // 15ms @cs=8
 641         //TimeTaker timer1("add mud");
 642         MapNode n_dirt(c_dirt), n_gravel(c_gravel);
 643         MapNode n_sand(c_sand), n_desert_sand(c_desert_sand);
 644         MapNode addnode;
 645
 646         u32 index = 0;
 647         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 648         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 649                 // Randomize mud amount
 650                 s16 mud_add_amount = getMudAmount(index) / 2.0 + 0.5;
 651
 652                 // Find ground level
 653                 s16 surface_y = find_stone_level(v2s16(x, z)); /////////////////optimize this!
 654
 655                 // Handle area not found
 656                 if (surface_y == vm->m_area.MinEdge.Y - 1)
 657                         continue;
 658
 659                 BiomeType bt = getBiome(index, v2s16(x, z));
 660                 addnode = (bt == BT_DESERT) ? n_desert_sand : n_dirt;
 661
 662                 if (bt == BT_DESERT && surface_y + mud_add_amount <= water_level + 1) {
 663                         addnode = n_sand;
 664                 } else if (mud_add_amount <= 0) {
 665                         mud_add_amount = 1 - mud_add_amount;
 666                         addnode = n_gravel;
 667                 } else if (bt == BT_NORMAL && getHaveBeach(index) &&
 668                                 surface_y + mud_add_amount <= water_level + 2) {
 669                         addnode = n_sand;
 670                 }
 671
 672                 if (bt == BT_DESERT && surface_y > 20)
 673                         mud_add_amount = MYMAX(0, mud_add_amount - (surface_y - 20) / 5);
 674
 675                 // If topmost node is grass, change it to mud.  It might be if it was
 676                 // flown to there from a neighboring chunk and then converted.
 677                 u32 i = vm->m_area.index(x, surface_y, z);
 678                 if (vm->m_data[i].getContent() == c_dirt_with_grass)
 679                         vm->m_data[i] = n_dirt;
 680
 681                 // Add mud on ground
 682                 s16 mudcount = 0;
 683                 v3s16 em = vm->m_area.getExtent();
 684                 s16 y_start = surface_y + 1;
 685                 i = vm->m_area.index(x, y_start, z);
 686                 for (s16 y = y_start; y <= node_max.Y; y++) {
 687                         if (mudcount >= mud_add_amount)
 688                                 break;
 689
 690                         vm->m_data[i] = addnode;
 691                         mudcount++;
 692
 693                         vm->m_area.add_y(em, i, 1);
 694                 }
 695         }
 696 }
 697
 698
 699 void MapgenV6::flowMud(s16 &mudflow_minpos, s16 &mudflow_maxpos) {
 700         // 340ms @cs=8
 701         TimeTaker timer1("flow mud");
 702
 703         // Iterate a few times
 704         for(s16 k = 0; k < 3; k++) {
 705                 for (s16 z = mudflow_minpos; z <= mudflow_maxpos; z++)
 706                 for (s16 x = mudflow_minpos; x <= mudflow_maxpos; x++) {
 707                         // Invert coordinates every 2nd iteration
 708                         if (k % 2 == 0) {
 709                                 x = mudflow_maxpos - (x - mudflow_minpos);
 710                                 z = mudflow_maxpos - (z - mudflow_minpos);
 711                         }
 712
 713                         // Node position in 2d
 714                         v2s16 p2d = v2s16(node_min.X, node_min.Z) + v2s16(x, z);
 715
 716                         v3s16 em = vm->m_area.getExtent();
 717                         u32 i = vm->m_area.index(p2d.X, node_max.Y, p2d.Y);
 718                         s16 y = node_max.Y;
 719
 720                         while(y >= node_min.Y)
 721                         {
 722
 723                         for(;; y--)
 724                         {
 725                                 MapNode *n = NULL;
 726                                 // Find mud
 727                                 for(; y >= node_min.Y; y--) {
 728                                         n = &vm->m_data[i];
 729                                         if (n->getContent() == c_dirt ||
 730                                                 n->getContent() == c_dirt_with_grass ||
 731                                                 n->getContent() == c_gravel)
 732                                                 break;
 733
 734                                         vm->m_area.add_y(em, i, -1);
 735                                 }
 736
 737                                 // Stop if out of area
 738                                 //if(vmanip.m_area.contains(i) == false)
 739                                 if (y < node_min.Y)
 740                                         break;
 741
 742                                 if (n->getContent() == c_dirt ||
 743                                         n->getContent() == c_dirt_with_grass)
 744                                 {
 745                                         // Make it exactly mud
 746                                         n->setContent(c_dirt);
 747
 748                                         // Don't flow it if the stuff under it is not mud
 749                                         {
 750                                                 u32 i2 = i;
 751                                                 vm->m_area.add_y(em, i2, -1);
 752                                                 // Cancel if out of area
 753                                                 if(vm->m_area.contains(i2) == false)
 754                                                         continue;
 755                                                 MapNode *n2 = &vm->m_data[i2];
 756                                                 if (n2->getContent() != c_dirt &&
 757                                                         n2->getContent() != c_dirt_with_grass)
 758                                                         continue;
 759                                         }
 760                                 }
 761
 762                                 v3s16 dirs4[4] = {
 763                                         v3s16(0,0,1), // back
 764                                         v3s16(1,0,0), // right
 765                                         v3s16(0,0,-1), // front
 766                                         v3s16(-1,0,0), // left
 767                                 };
 768
 769                                 // Check that upper is air or doesn't exist.
 770                                 // Cancel dropping if upper keeps it in place
 771                                 u32 i3 = i;
 772                                 vm->m_area.add_y(em, i3, 1);
 773                                 if (vm->m_area.contains(i3) == true &&
 774                                         ndef->get(vm->m_data[i3]).walkable)
 775                                         continue;
 776
 777                                 // Drop mud on side
 778                                 for(u32 di=0; di<4; di++) {
 779                                         v3s16 dirp = dirs4[di];
 780                                         u32 i2 = i;
 781                                         // Move to side
 782                                         vm->m_area.add_p(em, i2, dirp);
 783                                         // Fail if out of area
 784                                         if (vm->m_area.contains(i2) == false)
 785                                                 continue;
 786                                         // Check that side is air
 787                                         MapNode *n2 = &vm->m_data[i2];
 788                                         if (ndef->get(*n2).walkable)
 789                                                 continue;
 790                                         // Check that under side is air
 791                                         vm->m_area.add_y(em, i2, -1);
 792                                         if (vm->m_area.contains(i2) == false)
 793                                                 continue;
 794                                         n2 = &vm->m_data[i2];
 795                                         if (ndef->get(*n2).walkable)
 796                                                 continue;
 797                                         // Loop further down until not air
 798                                         bool dropped_to_unknown = false;
 799                                         do {
 800                                                 vm->m_area.add_y(em, i2, -1);
 801                                                 n2 = &vm->m_data[i2];
 802                                                 // if out of known area
 803                                                 if(vm->m_area.contains(i2) == false ||
 804                                                         n2->getContent() == CONTENT_IGNORE) {
 805                                                         dropped_to_unknown = true;
 806                                                         break;
 807                                                 }
 808                                         } while (ndef->get(*n2).walkable == false);
 809                                         // Loop one up so that we're in air
 810                                         vm->m_area.add_y(em, i2, 1);
 811                                         n2 = &vm->m_data[i2];
 812
 813                                         bool old_is_water = (n->getContent() == c_water_source);
 814                                         // Move mud to new place
 815                                         if (!dropped_to_unknown) {
 816                                                 *n2 = *n;
 817                                                 // Set old place to be air (or water)
 818                                                 if(old_is_water)
 819                                                         *n = MapNode(c_water_source);
 820                                                 else
 821                                                         *n = MapNode(CONTENT_AIR);
 822                                         }
 823
 824                                         // Done
 825                                         break;
 826                                 }
 827                         }
 828                         }
 829                 }
 830         }
 831 }
 832
 833
 834 void MapgenV6::addDirtGravelBlobs() {
 835         if (getBiome(v2s16(node_min.X, node_min.Z)) != BT_NORMAL)
 836                 return;
 837
 838         PseudoRandom pr(blockseed + 983);
 839         for (int i = 0; i < volume_nodes/10/10/10; i++) {
 840                 bool only_fill_cave = (myrand_range(0,1) != 0);
 841                 v3s16 size(
 842                         pr.range(1, 8),
 843                         pr.range(1, 8),
 844                         pr.range(1, 8)
 845                 );
 846                 v3s16 p0(
 847                         pr.range(node_min.X, node_max.X) - size.X / 2,
 848                         pr.range(node_min.Y, node_max.Y) - size.Y / 2,
 849                         pr.range(node_min.Z, node_max.Z) - size.Z / 2
 850                 );
 851
 852                 MapNode n1((p0.Y > -32 && !pr.range(0, 1)) ? c_dirt : c_gravel);
 853                 for (int z1 = 0; z1 < size.Z; z1++)
 854                 for (int y1 = 0; y1 < size.Y; y1++)
 855                 for (int x1 = 0; x1 < size.X; x1++) {
 856                         v3s16 p = p0 + v3s16(x1, y1, z1);
 857                         u32 i = vm->m_area.index(p);
 858                         if (!vm->m_area.contains(i))
 859                                 continue;
 860                         // Cancel if not stone and not cave air
 861                         if (vm->m_data[i].getContent() != c_stone &&
 862                                 !(vm->m_flags[i] & VMANIP_FLAG_CAVE))
 863                                 continue;
 864                         if (only_fill_cave && !(vm->m_flags[i] & VMANIP_FLAG_CAVE))
 865                                 continue;
 866                         vm->m_data[i] = n1;
 867                 }
 868         }
 869 }
 870
 871
 872 void MapgenV6::placeTreesAndJungleGrass() {
 873         //TimeTaker t("placeTrees");
 874         if (node_max.Y < water_level)
 875                 return;
 876
 877         PseudoRandom grassrandom(blockseed + 53);
 878         content_t c_junglegrass = ndef->getId("mapgen_junglegrass");
 879         // if we don't have junglegrass, don't place cignore... that's bad
 880         if (c_junglegrass == CONTENT_IGNORE)
 881                 c_junglegrass = CONTENT_AIR;
 882         MapNode n_junglegrass(c_junglegrass);
 883         v3s16 em = vm->m_area.getExtent();
 884
 885         // Divide area into parts
 886         s16 div = 8;
 887         s16 sidelen = central_area_size.X / div;
 888         double area = sidelen * sidelen;
 889
 890         // N.B.  We must add jungle grass first, since tree leaves will
 891         // obstruct the ground, giving us a false ground level
 892         for (s16 z0 = 0; z0 < div; z0++)
 893         for (s16 x0 = 0; x0 < div; x0++) {
 894                 // Center position of part of division
 895                 v2s16 p2d_center(
 896                         node_min.X + sidelen / 2 + sidelen * x0,
 897                         node_min.Z + sidelen / 2 + sidelen * z0
 898                 );
 899                 // Minimum edge of part of division
 900                 v2s16 p2d_min(
 901                         node_min.X + sidelen * x0,
 902                         node_min.Z + sidelen * z0
 903                 );
 904                 // Maximum edge of part of division
 905                 v2s16 p2d_max(
 906                         node_min.X + sidelen + sidelen * x0 - 1,
 907                         node_min.Z + sidelen + sidelen * z0 - 1
 908                 );
 909
 910                 // Amount of trees, jungle area
 911                 u32 tree_count = area * getTreeAmount(p2d_center);
 912
 913                 float humidity;
 914                 bool is_jungle = false;
 915                 if (spflags & MGV6_JUNGLES) {
 916                         humidity = getHumidity(p2d_center);
 917                         if (humidity > 0.75) {
 918                                 is_jungle = true;
 919                                 tree_count *= 4;
 920                         }
 921                 }
 922
 923                 // Add jungle grass
 924                 if (is_jungle) {
 925                         u32 grass_count = 5 * humidity * tree_count;
 926                         for (u32 i = 0; i < grass_count; i++) {
 927                                 s16 x = grassrandom.range(p2d_min.X, p2d_max.X);
 928                                 s16 z = grassrandom.range(p2d_min.Y, p2d_max.Y);
 929
 930                                 s16 y = findGroundLevelFull(v2s16(x, z)); ////////////////optimize this!
 931                                 if (y < water_level || y < node_min.Y || y > node_max.Y)
 932                                         continue;
 933
 934                                 u32 vi = vm->m_area.index(x, y, z);
 935                                 // place on dirt_with_grass, since we know it is exposed to sunlight
 936                                 if (vm->m_data[vi].getContent() == c_dirt_with_grass) {
 937                                         vm->m_area.add_y(em, vi, 1);
 938                                         vm->m_data[vi] = n_junglegrass;
 939                                 }
 940                         }
 941                 }
 942
 943                 // Put trees in random places on part of division
 944                 for (u32 i = 0; i < tree_count; i++) {
 945                         s16 x = myrand_range(p2d_min.X, p2d_max.X);
 946                         s16 z = myrand_range(p2d_min.Y, p2d_max.Y);
 947                         s16 y = findGroundLevelFull(v2s16(x, z)); ////////////////////optimize this!
 948                         // Don't make a tree under water level
 949                         // Don't make a tree so high that it doesn't fit
 950                         if(y < water_level || y > node_max.Y - 6)
 951                                 continue;
 952
 953                         v3s16 p(x,y,z);
 954                         // Trees grow only on mud and grass
 955                         {
 956                                 u32 i = vm->m_area.index(p);
 957                                 MapNode *n = &vm->m_data[i];
 958                                 if (n->getContent() != c_dirt &&
 959                                         n->getContent() != c_dirt_with_grass)
 960                                         continue;
 961                         }
 962                         p.Y++;
 963
 964                         // Make a tree
 965                         if (is_jungle) {
 966                                 treegen::make_jungletree(*vm, p, ndef, myrand());
 967                         } else {
 968                                 bool is_apple_tree = (myrand_range(0, 3) == 0) &&
 969                                                                                 getHaveAppleTree(v2s16(x, z));
 970                                 treegen::make_tree(*vm, p, is_apple_tree, ndef, myrand());
 971                         }
 972                 }
 973         }
 974         //printf("placeTreesAndJungleGrass: %dms\n", t.stop());
 975 }
 976
 977
 978 void MapgenV6::growGrass() {
 979         for (s16 z = full_node_min.Z; z <= full_node_max.Z; z++)
 980         for (s16 x = full_node_min.X; x <= full_node_max.X; x++) {
 981                 // Find the lowest surface to which enough light ends up to make
 982                 // grass grow.  Basically just wait until not air and not leaves.
 983                 s16 surface_y = 0;
 984                 {
 985                         v3s16 em = vm->m_area.getExtent();
 986                         u32 i = vm->m_area.index(x, node_max.Y, z);
 987                         s16 y;
 988                         // Go to ground level
 989                         for (y = node_max.Y; y >= full_node_min.Y; y--) {
 990                                 MapNode &n = vm->m_data[i];
 991                                 if (ndef->get(n).param_type != CPT_LIGHT ||
 992                                         ndef->get(n).liquid_type != LIQUID_NONE)
 993                                         break;
 994                                 vm->m_area.add_y(em, i, -1);
 995                         }
 996                         surface_y = (y >= full_node_min.Y) ? y : full_node_min.Y;
 997                 }
 998
 999                 u32 i = vm->m_area.index(x, surface_y, z);
1000                 MapNode *n = &vm->m_data[i];
1001                 if (n->getContent() == c_dirt && surface_y >= water_level - 20)
1002                         n->setContent(c_dirt_with_grass);
1003         }
1004 }
1005
1006
1007 void MapgenV6::generateCaves(int max_stone_y) {
1008         float cave_amount = NoisePerlin2D(np_cave, node_min.X, node_min.Y, seed);
1009         int volume_nodes = (node_max.X - node_min.X + 1) *
1010                                            (node_max.Y - node_min.Y + 1) * MAP_BLOCKSIZE;
1011         cave_amount = MYMAX(0.0, cave_amount);
1012         u32 caves_count = cave_amount * volume_nodes / 50000;
1013         u32 bruises_count = 1;
1014         PseudoRandom ps(blockseed + 21343);
1015         PseudoRandom ps2(blockseed + 1032);
1016
1017         if (ps.range(1, 6) == 1)
1018                 bruises_count = ps.range(0, ps.range(0, 2));
1019
1020         if (getBiome(v2s16(node_min.X, node_min.Z)) == BT_DESERT) {
1021                 caves_count   /= 3;
1022                 bruises_count /= 3;
1023         }
1024
1025         for (u32 i = 0; i < caves_count + bruises_count; i++) {
1026                 bool large_cave = (i >= caves_count);
1027                 CaveV6 cave(this, &ps, &ps2, large_cave);
1028
1029                 cave.makeCave(node_min, node_max, max_stone_y);
1030         }
1031 }