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 "emerge.h"
  34 #include "dungeongen.h"
  35 #include "cavegen.h"
  36 #include "treegen.h"
  37 #include "mg_ore.h"
  38 #include "mg_decoration.h"
  39 #include "mapgen_v6.h"
  40
  41 FlagDesc flagdesc_mapgen_v6[] = {
  42         {"jungles",    MGV6_JUNGLES},
  43         {"biomeblend", MGV6_BIOMEBLEND},
  44         {"mudflow",    MGV6_MUDFLOW},
  45         {"snowbiomes", MGV6_SNOWBIOMES},
  46         {NULL,         0}
  47 };
  48
  49 ///////////////////////////////////////////////////////////////////////////////
  50
  51
  52 MapgenV6::MapgenV6(int mapgenid, MapgenParams *params, EmergeManager *emerge)
  53         : Mapgen(mapgenid, params, emerge)
  54 {
  55         this->m_emerge = emerge;
  56         this->ystride = csize.X; //////fix this
  57
  58         this->heightmap = new s16[csize.X * csize.Z];
  59
  60         MapgenV6Params *sp = (MapgenV6Params *)params->sparams;
  61         this->spflags     = sp->spflags;
  62         this->freq_desert = sp->freq_desert;
  63         this->freq_beach  = sp->freq_beach;
  64
  65         np_cave        = &sp->np_cave;
  66         np_humidity    = &sp->np_humidity;
  67         np_trees       = &sp->np_trees;
  68         np_apple_trees = &sp->np_apple_trees;
  69
  70         //// Create noise objects
  71         noise_terrain_base   = new Noise(&sp->np_terrain_base,   seed, csize.X, csize.Y);
  72         noise_terrain_higher = new Noise(&sp->np_terrain_higher, seed, csize.X, csize.Y);
  73         noise_steepness      = new Noise(&sp->np_steepness,      seed, csize.X, csize.Y);
  74         noise_height_select  = new Noise(&sp->np_height_select,  seed, csize.X, csize.Y);
  75         noise_mud            = new Noise(&sp->np_mud,            seed, csize.X, csize.Y);
  76         noise_beach          = new Noise(&sp->np_beach,          seed, csize.X, csize.Y);
  77         noise_biome          = new Noise(&sp->np_biome,          seed,
  78                         csize.X + 2 * MAP_BLOCKSIZE, csize.Y + 2 * MAP_BLOCKSIZE);
  79         noise_humidity       = new Noise(&sp->np_humidity,       seed,
  80                         csize.X + 2 * MAP_BLOCKSIZE, csize.Y + 2 * MAP_BLOCKSIZE);
  81
  82         //// Resolve nodes to be used
  83         INodeDefManager *ndef = emerge->ndef;
  84
  85         c_stone           = ndef->getId("mapgen_stone");
  86         c_dirt            = ndef->getId("mapgen_dirt");
  87         c_dirt_with_grass = ndef->getId("mapgen_dirt_with_grass");
  88         c_sand            = ndef->getId("mapgen_sand");
  89         c_water_source    = ndef->getId("mapgen_water_source");
  90         c_lava_source     = ndef->getId("mapgen_lava_source");
  91         c_gravel          = ndef->getId("mapgen_gravel");
  92         c_cobble          = ndef->getId("mapgen_cobble");
  93         c_desert_sand     = ndef->getId("mapgen_desert_sand");
  94         c_desert_stone    = ndef->getId("mapgen_desert_stone");
  95         c_dirt_with_snow  = ndef->getId("mapgen_dirt_with_snow");
  96         c_snow            = ndef->getId("mapgen_snow");
  97         c_snowblock       = ndef->getId("mapgen_snowblock");
  98         c_ice             = ndef->getId("mapgen_ice");
  99
 100         c_mossycobble     = ndef->getId("mapgen_mossycobble");
 101         c_sandbrick       = ndef->getId("mapgen_sandstonebrick");
 102         c_stair_cobble    = ndef->getId("mapgen_stair_cobble");
 103         c_stair_sandstone = ndef->getId("mapgen_stair_sandstone");
 104         if (c_desert_sand == CONTENT_IGNORE)
 105                 c_desert_sand = c_sand;
 106         if (c_desert_stone == CONTENT_IGNORE)
 107                 c_desert_stone = c_stone;
 108         if (c_mossycobble == CONTENT_IGNORE)
 109                 c_mossycobble = c_cobble;
 110         if (c_sandbrick == CONTENT_IGNORE)
 111                 c_sandbrick = c_desert_stone;
 112         if (c_stair_cobble == CONTENT_IGNORE)
 113                 c_stair_cobble = c_cobble;
 114         if (c_stair_sandstone == CONTENT_IGNORE)
 115                 c_stair_sandstone = c_sandbrick;
 116 }
 117
 118
 119 MapgenV6::~MapgenV6()
 120 {
 121         delete noise_terrain_base;
 122         delete noise_terrain_higher;
 123         delete noise_steepness;
 124         delete noise_height_select;
 125         delete noise_mud;
 126         delete noise_beach;
 127         delete noise_biome;
 128         delete noise_humidity;
 129
 130         delete[] heightmap;
 131 }
 132
 133
 134 MapgenV6Params::MapgenV6Params()
 135 {
 136         spflags     = MGV6_BIOMEBLEND | MGV6_MUDFLOW;
 137         freq_desert = 0.45;
 138         freq_beach  = 0.15;
 139
 140         np_terrain_base   = NoiseParams(-4,   20.0, v3f(250.0, 250.0, 250.0), 82341,  5, 0.6,  2.0);
 141         np_terrain_higher = NoiseParams(20,   16.0, v3f(500.0, 500.0, 500.0), 85039,  5, 0.6,  2.0);
 142         np_steepness      = NoiseParams(0.85, 0.5,  v3f(125.0, 125.0, 125.0), -932,   5, 0.7,  2.0);
 143         np_height_select  = NoiseParams(0,    1.0,  v3f(250.0, 250.0, 250.0), 4213,   5, 0.69, 2.0);
 144         np_mud            = NoiseParams(4,    2.0,  v3f(200.0, 200.0, 200.0), 91013,  3, 0.55, 2.0);
 145         np_beach          = NoiseParams(0,    1.0,  v3f(250.0, 250.0, 250.0), 59420,  3, 0.50, 2.0);
 146         np_biome          = NoiseParams(0,    1.0,  v3f(250.0, 250.0, 250.0), 9130,   3, 0.50, 2.0);
 147         np_cave           = NoiseParams(6,    6.0,  v3f(250.0, 250.0, 250.0), 34329,  3, 0.50, 2.0);
 148         np_humidity       = NoiseParams(0.5,  0.5,  v3f(500.0, 500.0, 500.0), 72384,  4, 0.66, 2.0);
 149         np_trees          = NoiseParams(0,    1.0,  v3f(125.0, 125.0, 125.0), 2,      4, 0.66, 2.0);
 150         np_apple_trees    = NoiseParams(0,    1.0,  v3f(100.0, 100.0, 100.0), 342902, 3, 0.45, 2.0);
 151 }
 152
 153
 154 void MapgenV6Params::readParams(const Settings *settings)
 155 {
 156         settings->getFlagStrNoEx("mgv6_spflags", spflags, flagdesc_mapgen_v6);
 157         settings->getFloatNoEx("mgv6_freq_desert", freq_desert);
 158         settings->getFloatNoEx("mgv6_freq_beach",  freq_beach);
 159
 160         settings->getNoiseParams("mgv6_np_terrain_base",   np_terrain_base);
 161         settings->getNoiseParams("mgv6_np_terrain_higher", np_terrain_higher);
 162         settings->getNoiseParams("mgv6_np_steepness",      np_steepness);
 163         settings->getNoiseParams("mgv6_np_height_select",  np_height_select);
 164         settings->getNoiseParams("mgv6_np_mud",            np_mud);
 165         settings->getNoiseParams("mgv6_np_beach",          np_beach);
 166         settings->getNoiseParams("mgv6_np_biome",          np_biome);
 167         settings->getNoiseParams("mgv6_np_cave",           np_cave);
 168         settings->getNoiseParams("mgv6_np_humidity",       np_humidity);
 169         settings->getNoiseParams("mgv6_np_trees",          np_trees);
 170         settings->getNoiseParams("mgv6_np_apple_trees",    np_apple_trees);
 171 }
 172
 173
 174 void MapgenV6Params::writeParams(Settings *settings) const
 175 {
 176         settings->setFlagStr("mgv6_spflags", spflags, flagdesc_mapgen_v6, (u32)-1);
 177         settings->setFloat("mgv6_freq_desert", freq_desert);
 178         settings->setFloat("mgv6_freq_beach",  freq_beach);
 179
 180         settings->setNoiseParams("mgv6_np_terrain_base",   np_terrain_base);
 181         settings->setNoiseParams("mgv6_np_terrain_higher", np_terrain_higher);
 182         settings->setNoiseParams("mgv6_np_steepness",      np_steepness);
 183         settings->setNoiseParams("mgv6_np_height_select",  np_height_select);
 184         settings->setNoiseParams("mgv6_np_mud",            np_mud);
 185         settings->setNoiseParams("mgv6_np_beach",          np_beach);
 186         settings->setNoiseParams("mgv6_np_biome",          np_biome);
 187         settings->setNoiseParams("mgv6_np_cave",           np_cave);
 188         settings->setNoiseParams("mgv6_np_humidity",       np_humidity);
 189         settings->setNoiseParams("mgv6_np_trees",          np_trees);
 190         settings->setNoiseParams("mgv6_np_apple_trees",    np_apple_trees);
 191 }
 192
 193
 194 //////////////////////// Some helper functions for the map generator
 195
 196
 197 // Returns Y one under area minimum if not found
 198 s16 MapgenV6::find_stone_level(v2s16 p2d)
 199 {
 200         v3s16 em = vm->m_area.getExtent();
 201         s16 y_nodes_max = vm->m_area.MaxEdge.Y;
 202         s16 y_nodes_min = vm->m_area.MinEdge.Y;
 203         u32 i = vm->m_area.index(p2d.X, y_nodes_max, p2d.Y);
 204         s16 y;
 205
 206         for (y = y_nodes_max; y >= y_nodes_min; y--) {
 207                 content_t c = vm->m_data[i].getContent();
 208                 if (c != CONTENT_IGNORE && (c == c_stone || c == c_desert_stone))
 209                         break;
 210
 211                 vm->m_area.add_y(em, i, -1);
 212         }
 213         return (y >= y_nodes_min) ? y : y_nodes_min - 1;
 214 }
 215
 216
 217 // Required by mapgen.h
 218 bool MapgenV6::block_is_underground(u64 seed, v3s16 blockpos)
 219 {
 220         /*s16 minimum_groundlevel = (s16)get_sector_minimum_ground_level(
 221                         seed, v2s16(blockpos.X, blockpos.Z));*/
 222         // Nah, this is just a heuristic, just return something
 223         s16 minimum_groundlevel = water_level;
 224
 225         if(blockpos.Y * MAP_BLOCKSIZE + MAP_BLOCKSIZE <= minimum_groundlevel)
 226                 return true;
 227         else
 228                 return false;
 229 }
 230
 231
 232 //////////////////////// Base terrain height functions
 233
 234 float MapgenV6::baseTerrainLevel(float terrain_base, float terrain_higher,
 235         float steepness, float height_select)
 236 {
 237         float base   = 1 + terrain_base;
 238         float higher = 1 + terrain_higher;
 239
 240         // Limit higher ground level to at least base
 241         if(higher < base)
 242                 higher = base;
 243
 244         // Steepness factor of cliffs
 245         float b = steepness;
 246         b = rangelim(b, 0.0, 1000.0);
 247         b = 5 * b * b * b * b * b * b * b;
 248         b = rangelim(b, 0.5, 1000.0);
 249
 250         // Values 1.5...100 give quite horrible looking slopes
 251         if (b > 1.5 && b < 100.0)
 252                 b = (b < 10.0) ? 1.5 : 100.0;
 253
 254         float a_off = -0.20; // Offset to more low
 255         float a = 0.5 + b * (a_off + height_select);
 256         a = rangelim(a, 0.0, 1.0); // Limit
 257
 258         return base * (1.0 - a) + higher * a;
 259 }
 260
 261
 262 float MapgenV6::baseTerrainLevelFromNoise(v2s16 p)
 263 {
 264         if (flags & MG_FLAT)
 265                 return water_level;
 266
 267         float terrain_base   = NoisePerlin2D_PO(&noise_terrain_base->np,
 268                                                         p.X, 0.5, p.Y, 0.5, seed);
 269         float terrain_higher = NoisePerlin2D_PO(&noise_terrain_higher->np,
 270                                                         p.X, 0.5, p.Y, 0.5, seed);
 271         float steepness      = NoisePerlin2D_PO(&noise_steepness->np,
 272                                                         p.X, 0.5, p.Y, 0.5, seed);
 273         float height_select  = NoisePerlin2D_PO(&noise_height_select->np,
 274                                                         p.X, 0.5, p.Y, 0.5, seed);
 275
 276         return baseTerrainLevel(terrain_base, terrain_higher,
 277                                                         steepness, height_select);
 278 }
 279
 280
 281 float MapgenV6::baseTerrainLevelFromMap(v2s16 p)
 282 {
 283         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 284         return baseTerrainLevelFromMap(index);
 285 }
 286
 287
 288 float MapgenV6::baseTerrainLevelFromMap(int index)
 289 {
 290         if (flags & MG_FLAT)
 291                 return water_level;
 292
 293         float terrain_base   = noise_terrain_base->result[index];
 294         float terrain_higher = noise_terrain_higher->result[index];
 295         float steepness      = noise_steepness->result[index];
 296         float height_select  = noise_height_select->result[index];
 297
 298         return baseTerrainLevel(terrain_base, terrain_higher,
 299                                                         steepness, height_select);
 300 }
 301
 302
 303 s16 MapgenV6::find_ground_level_from_noise(u64 seed, v2s16 p2d, s16 precision)
 304 {
 305         return baseTerrainLevelFromNoise(p2d) + AVERAGE_MUD_AMOUNT;
 306 }
 307
 308
 309 int MapgenV6::getGroundLevelAtPoint(v2s16 p)
 310 {
 311         return baseTerrainLevelFromNoise(p) + AVERAGE_MUD_AMOUNT;
 312 }
 313
 314
 315 //////////////////////// Noise functions
 316
 317 float MapgenV6::getMudAmount(v2s16 p)
 318 {
 319         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 320         return getMudAmount(index);
 321 }
 322
 323
 324 bool MapgenV6::getHaveBeach(v2s16 p)
 325 {
 326         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 327         return getHaveBeach(index);
 328 }
 329
 330
 331 BiomeV6Type MapgenV6::getBiome(v2s16 p)
 332 {
 333         int index = (p.Y - full_node_min.Z) * (ystride + 2 * MAP_BLOCKSIZE)
 334                         + (p.X - full_node_min.X);
 335         return getBiome(index, p);
 336 }
 337
 338
 339 float MapgenV6::getHumidity(v2s16 p)
 340 {
 341         /*double noise = noise2d_perlin(
 342                 0.5+(float)p.X/500, 0.5+(float)p.Y/500,
 343                 seed+72384, 4, 0.66);
 344         noise = (noise + 1.0)/2.0;*/
 345
 346         int index = (p.Y - full_node_min.Z) * (ystride + 2 * MAP_BLOCKSIZE)
 347                         + (p.X - full_node_min.X);
 348         float noise = noise_humidity->result[index];
 349
 350         if (noise < 0.0)
 351                 noise = 0.0;
 352         if (noise > 1.0)
 353                 noise = 1.0;
 354         return noise;
 355 }
 356
 357
 358 float MapgenV6::getTreeAmount(v2s16 p)
 359 {
 360         /*double noise = noise2d_perlin(
 361                         0.5+(float)p.X/125, 0.5+(float)p.Y/125,
 362                         seed+2, 4, 0.66);*/
 363
 364         float noise = NoisePerlin2D(np_trees, p.X, p.Y, seed);
 365         float zeroval = -0.39;
 366         if (noise < zeroval)
 367                 return 0;
 368         else
 369                 return 0.04 * (noise - zeroval) / (1.0 - zeroval);
 370 }
 371
 372
 373 bool MapgenV6::getHaveAppleTree(v2s16 p)
 374 {
 375         /*is_apple_tree = noise2d_perlin(
 376                 0.5+(float)p.X/100, 0.5+(float)p.Z/100,
 377                 data->seed+342902, 3, 0.45) > 0.2;*/
 378
 379         float noise = NoisePerlin2D(np_apple_trees, p.X, p.Y, seed);
 380
 381         return noise > 0.2;
 382 }
 383
 384
 385 float MapgenV6::getMudAmount(int index)
 386 {
 387         if (flags & MG_FLAT)
 388                 return AVERAGE_MUD_AMOUNT;
 389
 390         /*return ((float)AVERAGE_MUD_AMOUNT + 2.0 * noise2d_perlin(
 391                         0.5+(float)p.X/200, 0.5+(float)p.Y/200,
 392                         seed+91013, 3, 0.55));*/
 393
 394         return noise_mud->result[index];
 395 }
 396
 397
 398 bool MapgenV6::getHaveBeach(int index)
 399 {
 400         // Determine whether to have sand here
 401         /*double sandnoise = noise2d_perlin(
 402                         0.2+(float)p2d.X/250, 0.7+(float)p2d.Y/250,
 403                         seed+59420, 3, 0.50);*/
 404
 405         float sandnoise = noise_beach->result[index];
 406         return (sandnoise > freq_beach);
 407 }
 408
 409
 410 BiomeV6Type MapgenV6::getBiome(int index, v2s16 p)
 411 {
 412         // Just do something very simple as for now
 413         /*double d = noise2d_perlin(
 414                         0.6+(float)p2d.X/250, 0.2+(float)p2d.Y/250,
 415                         seed+9130, 3, 0.50);*/
 416
 417         float d = noise_biome->result[index];
 418         float h = noise_humidity->result[index];
 419
 420         if (spflags & MGV6_SNOWBIOMES) {
 421                 float blend = (spflags & MGV6_BIOMEBLEND) ? noise2d(p.X, p.Y, seed) / 40 : 0;
 422
 423                 if (d > FREQ_HOT + blend) {
 424                         if (h > FREQ_JUNGLE + blend)
 425                                 return BT_JUNGLE;
 426                         else
 427                                 return BT_DESERT;
 428                 } else if (d < FREQ_SNOW + blend) {
 429                         if (h > FREQ_TAIGA + blend)
 430                                 return BT_TAIGA;
 431                         else
 432                                 return BT_TUNDRA;
 433                 } else {
 434                         return BT_NORMAL;
 435                 }
 436         } else {
 437                 if (d > freq_desert)
 438                         return BT_DESERT;
 439
 440                 if ((spflags & MGV6_BIOMEBLEND) && (d > freq_desert - 0.10) &&
 441                                 ((noise2d(p.X, p.Y, seed) + 1.0) > (freq_desert - d) * 20.0))
 442                         return BT_DESERT;
 443
 444                 if ((spflags & MGV6_JUNGLES) && h > 0.75)
 445                         return BT_JUNGLE;
 446                 else
 447                         return BT_NORMAL;
 448         }
 449 }
 450
 451
 452 u32 MapgenV6::get_blockseed(u64 seed, v3s16 p)
 453 {
 454         s32 x = p.X, y = p.Y, z = p.Z;
 455         return (u32)(seed % 0x100000000ULL) + z * 38134234 + y * 42123 + x * 23;
 456 }
 457
 458
 459 //////////////////////// Map generator
 460
 461 void MapgenV6::makeChunk(BlockMakeData *data)
 462 {
 463         // Pre-conditions
 464         assert(data->vmanip);
 465         assert(data->nodedef);
 466         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 467                    data->blockpos_requested.Y >= data->blockpos_min.Y &&
 468                    data->blockpos_requested.Z >= data->blockpos_min.Z);
 469         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 470                    data->blockpos_requested.Y <= data->blockpos_max.Y &&
 471                    data->blockpos_requested.Z <= data->blockpos_max.Z);
 472
 473         this->generating = true;
 474         this->vm   = data->vmanip;
 475         this->ndef = data->nodedef;
 476
 477         // Hack: use minimum block coords for old code that assumes a single block
 478         v3s16 blockpos_min = data->blockpos_min;
 479         v3s16 blockpos_max = data->blockpos_max;
 480
 481         // Area of central chunk
 482         node_min = blockpos_min * MAP_BLOCKSIZE;
 483         node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 484
 485         // Full allocated area
 486         full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
 487         full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 488
 489         central_area_size = node_max - node_min + v3s16(1, 1, 1);
 490         assert(central_area_size.X == central_area_size.Z);
 491
 492         int volume_blocks = (blockpos_max.X - blockpos_min.X + 1)
 493                                           * (blockpos_max.Y - blockpos_min.Y + 1)
 494                                           * (blockpos_max.Z - blockpos_max.Z + 1);
 495
 496         volume_nodes = volume_blocks *
 497                 MAP_BLOCKSIZE * MAP_BLOCKSIZE * MAP_BLOCKSIZE;
 498
 499         // Create a block-specific seed
 500         blockseed = get_blockseed(data->seed, full_node_min);
 501
 502         // Make some noise
 503         calculateNoise();
 504
 505         // Maximum height of the stone surface and obstacles.
 506         // This is used to guide the cave generation
 507         s16 stone_surface_max_y;
 508
 509         // Generate general ground level to full area
 510         stone_surface_max_y = generateGround();
 511
 512         // Create initial heightmap to limit caves
 513         updateHeightmap(node_min, node_max);
 514
 515         const s16 max_spread_amount = MAP_BLOCKSIZE;
 516         // Limit dirt flow area by 1 because mud is flown into neighbors.
 517         s16 mudflow_minpos = -max_spread_amount + 1;
 518         s16 mudflow_maxpos = central_area_size.X + max_spread_amount - 2;
 519
 520         // Loop this part, it will make stuff look older and newer nicely
 521         const u32 age_loops = 2;
 522         for (u32 i_age = 0; i_age < age_loops; i_age++) { // Aging loop
 523                 // Make caves (this code is relatively horrible)
 524                 if (flags & MG_CAVES)
 525                         generateCaves(stone_surface_max_y);
 526
 527                 // Add mud to the central chunk
 528                 addMud();
 529
 530                 // Flow mud away from steep edges
 531                 if (spflags & MGV6_MUDFLOW)
 532                         flowMud(mudflow_minpos, mudflow_maxpos);
 533
 534         }
 535
 536         // Update heightmap after mudflow
 537         updateHeightmap(node_min, node_max);
 538
 539         // Add dungeons
 540         if ((flags & MG_DUNGEONS) && (stone_surface_max_y >= node_min.Y)) {
 541                 DungeonParams dp;
 542
 543                 dp.np_rarity  = nparams_dungeon_rarity;
 544                 dp.np_density = nparams_dungeon_density;
 545                 dp.np_wetness = nparams_dungeon_wetness;
 546                 dp.c_water = c_water_source;
 547                 if (getBiome(0, v2s16(node_min.X, node_min.Z)) == BT_DESERT) {
 548                         dp.c_cobble  = c_sandbrick;
 549                         dp.c_moss    = c_sandbrick; // should make this 'cracked sandstone' later
 550                         dp.c_stair   = c_stair_sandstone;
 551
 552                         dp.diagonal_dirs = true;
 553                         dp.mossratio  = 0.0;
 554                         dp.holesize   = v3s16(2, 3, 2);
 555                         dp.roomsize   = v3s16(2, 5, 2);
 556                         dp.notifytype = GENNOTIFY_TEMPLE;
 557                 } else {
 558                         dp.c_cobble  = c_cobble;
 559                         dp.c_moss    = c_mossycobble;
 560                         dp.c_stair   = c_stair_cobble;
 561
 562                         dp.diagonal_dirs = false;
 563                         dp.mossratio  = 3.0;
 564                         dp.holesize   = v3s16(1, 2, 1);
 565                         dp.roomsize   = v3s16(0, 0, 0);
 566                         dp.notifytype = GENNOTIFY_DUNGEON;
 567                 }
 568
 569                 DungeonGen dgen(this, &dp);
 570                 dgen.generate(blockseed, full_node_min, full_node_max);
 571         }
 572
 573         // Add top and bottom side of water to transforming_liquid queue
 574         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 575
 576         // Add surface nodes
 577         growGrass();
 578
 579         // Generate some trees, and add grass, if a jungle
 580         if (flags & MG_TREES)
 581                 placeTreesAndJungleGrass();
 582
 583         // Generate the registered decorations
 584         m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
 585
 586         // Generate the registered ores
 587         m_emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
 588
 589         // Calculate lighting
 590         if (flags & MG_LIGHT)
 591                 calcLighting(node_min, node_max);
 592
 593         this->generating = false;
 594 }
 595
 596
 597 void MapgenV6::calculateNoise()
 598 {
 599         int x = node_min.X;
 600         int z = node_min.Z;
 601         int fx = full_node_min.X;
 602         int fz = full_node_min.Z;
 603
 604         if (!(flags & MG_FLAT)) {
 605                 noise_terrain_base->perlinMap2D_PO(x, 0.5, z, 0.5);
 606                 noise_terrain_higher->perlinMap2D_PO(x, 0.5, z, 0.5);
 607                 noise_steepness->perlinMap2D_PO(x, 0.5, z, 0.5);
 608                 noise_height_select->perlinMap2D_PO(x, 0.5, z, 0.5);
 609                 noise_mud->perlinMap2D_PO(x, 0.5, z, 0.5);
 610         }
 611
 612         noise_beach->perlinMap2D_PO(x, 0.2, z, 0.7);
 613
 614         noise_biome->perlinMap2D_PO(fx, 0.6, fz, 0.2);
 615         noise_humidity->perlinMap2D_PO(fx, 0.0, fz, 0.0);
 616         // Humidity map does not need range limiting 0 to 1,
 617         // only humidity at point does
 618 }
 619
 620
 621 int MapgenV6::generateGround()
 622 {
 623         //TimeTaker timer1("Generating ground level");
 624         MapNode n_air(CONTENT_AIR), n_water_source(c_water_source);
 625         MapNode n_stone(c_stone), n_desert_stone(c_desert_stone);
 626         MapNode n_ice(c_ice);
 627         int stone_surface_max_y = -MAP_GENERATION_LIMIT;
 628
 629         u32 index = 0;
 630         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 631         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 632                 // Surface height
 633                 s16 surface_y = (s16)baseTerrainLevelFromMap(index);
 634
 635                 // Log it
 636                 if (surface_y > stone_surface_max_y)
 637                         stone_surface_max_y = surface_y;
 638
 639                 BiomeV6Type bt = getBiome(v2s16(x, z));
 640
 641                 // Fill ground with stone
 642                 v3s16 em = vm->m_area.getExtent();
 643                 u32 i = vm->m_area.index(x, node_min.Y, z);
 644                 for (s16 y = node_min.Y; y <= node_max.Y; y++) {
 645                         if (vm->m_data[i].getContent() == CONTENT_IGNORE) {
 646                                 if (y <= surface_y) {
 647                                         vm->m_data[i] = (y >= DESERT_STONE_BASE
 648                                                         && bt == BT_DESERT) ?
 649                                                 n_desert_stone : n_stone;
 650                                 } else if (y <= water_level) {
 651                                         vm->m_data[i] = (y >= ICE_BASE
 652                                                         && bt == BT_TUNDRA) ?
 653                                                 n_ice : n_water_source;
 654                                 } else {
 655                                         vm->m_data[i] = n_air;
 656                                 }
 657                         }
 658                         vm->m_area.add_y(em, i, 1);
 659                 }
 660         }
 661
 662         return stone_surface_max_y;
 663 }
 664
 665
 666 void MapgenV6::addMud()
 667 {
 668         // 15ms @cs=8
 669         //TimeTaker timer1("add mud");
 670         MapNode n_dirt(c_dirt), n_gravel(c_gravel);
 671         MapNode n_sand(c_sand), n_desert_sand(c_desert_sand);
 672         MapNode addnode;
 673
 674         u32 index = 0;
 675         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 676         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 677                 // Randomize mud amount
 678                 s16 mud_add_amount = getMudAmount(index) / 2.0 + 0.5;
 679
 680                 // Find ground level
 681                 s16 surface_y = find_stone_level(v2s16(x, z)); /////////////////optimize this!
 682
 683                 // Handle area not found
 684                 if (surface_y == vm->m_area.MinEdge.Y - 1)
 685                         continue;
 686
 687                 BiomeV6Type bt = getBiome(v2s16(x, z));
 688                 addnode = (bt == BT_DESERT) ? n_desert_sand : n_dirt;
 689
 690                 if (bt == BT_DESERT && surface_y + mud_add_amount <= water_level + 1) {
 691                         addnode = n_sand;
 692                 } else if (mud_add_amount <= 0) {
 693                         mud_add_amount = 1 - mud_add_amount;
 694                         addnode = n_gravel;
 695                 } else if (bt != BT_DESERT && getHaveBeach(index) &&
 696                                 surface_y + mud_add_amount <= water_level + 2) {
 697                         addnode = n_sand;
 698                 }
 699
 700                 if ((bt == BT_DESERT || bt == BT_TUNDRA) && surface_y > 20)
 701                         mud_add_amount = MYMAX(0, mud_add_amount - (surface_y - 20) / 5);
 702
 703                 /* If topmost node is grass, change it to mud.  It might be if it was
 704                 // flown to there from a neighboring chunk and then converted.
 705                 u32 i = vm->m_area.index(x, surface_y, z);
 706                 if (vm->m_data[i].getContent() == c_dirt_with_grass)
 707                         vm->m_data[i] = n_dirt;*/
 708
 709                 // Add mud on ground
 710                 s16 mudcount = 0;
 711                 v3s16 em = vm->m_area.getExtent();
 712                 s16 y_start = surface_y + 1;
 713                 u32 i = vm->m_area.index(x, y_start, z);
 714                 for (s16 y = y_start; y <= node_max.Y; y++) {
 715                         if (mudcount >= mud_add_amount)
 716                                 break;
 717
 718                         vm->m_data[i] = addnode;
 719                         mudcount++;
 720
 721                         vm->m_area.add_y(em, i, 1);
 722                 }
 723         }
 724 }
 725
 726
 727 void MapgenV6::flowMud(s16 &mudflow_minpos, s16 &mudflow_maxpos)
 728 {
 729         // 340ms @cs=8
 730         //TimeTaker timer1("flow mud");
 731
 732         // Iterate a few times
 733         for (s16 k = 0; k < 3; k++) {
 734                 for (s16 z = mudflow_minpos; z <= mudflow_maxpos; z++)
 735                 for (s16 x = mudflow_minpos; x <= mudflow_maxpos; x++) {
 736                         // Invert coordinates every 2nd iteration
 737                         if (k % 2 == 0) {
 738                                 x = mudflow_maxpos - (x - mudflow_minpos);
 739                                 z = mudflow_maxpos - (z - mudflow_minpos);
 740                         }
 741
 742                         // Node position in 2d
 743                         v2s16 p2d = v2s16(node_min.X, node_min.Z) + v2s16(x, z);
 744
 745                         v3s16 em = vm->m_area.getExtent();
 746                         u32 i = vm->m_area.index(p2d.X, node_max.Y, p2d.Y);
 747                         s16 y = node_max.Y;
 748
 749                         while (y >= node_min.Y) {
 750
 751                         for (;; y--) {
 752                                 MapNode *n = NULL;
 753                                 // Find mud
 754                                 for (; y >= node_min.Y; y--) {
 755                                         n = &vm->m_data[i];
 756                                         if (n->getContent() == c_dirt ||
 757                                                         n->getContent() == c_dirt_with_grass ||
 758                                                         n->getContent() == c_gravel)
 759                                                 break;
 760
 761                                         vm->m_area.add_y(em, i, -1);
 762                                 }
 763
 764                                 // Stop if out of area
 765                                 //if(vmanip.m_area.contains(i) == false)
 766                                 if (y < node_min.Y)
 767                                         break;
 768
 769                                 if (n->getContent() == c_dirt ||
 770                                                 n->getContent() == c_dirt_with_grass) {
 771                                         // Make it exactly mud
 772                                         n->setContent(c_dirt);
 773
 774                                         // Don't flow it if the stuff under it is not mud
 775                                         {
 776                                                 u32 i2 = i;
 777                                                 vm->m_area.add_y(em, i2, -1);
 778                                                 // Cancel if out of area
 779                                                 if (vm->m_area.contains(i2) == false)
 780                                                         continue;
 781                                                 MapNode *n2 = &vm->m_data[i2];
 782                                                 if (n2->getContent() != c_dirt &&
 783                                                                 n2->getContent() != c_dirt_with_grass)
 784                                                         continue;
 785                                         }
 786                                 }
 787
 788                                 v3s16 dirs4[4] = {
 789                                         v3s16(0, 0, 1), // back
 790                                         v3s16(1, 0, 0), // right
 791                                         v3s16(0, 0, -1), // front
 792                                         v3s16(-1, 0, 0), // left
 793                                 };
 794
 795                                 // Check that upper is air or doesn't exist.
 796                                 // Cancel dropping if upper keeps it in place
 797                                 u32 i3 = i;
 798                                 vm->m_area.add_y(em, i3, 1);
 799                                 if (vm->m_area.contains(i3) == true &&
 800                                                 ndef->get(vm->m_data[i3]).walkable)
 801                                         continue;
 802
 803                                 // Drop mud on side
 804                                 for(u32 di = 0; di < 4; di++) {
 805                                         v3s16 dirp = dirs4[di];
 806                                         u32 i2 = i;
 807                                         // Move to side
 808                                         vm->m_area.add_p(em, i2, dirp);
 809                                         // Fail if out of area
 810                                         if (vm->m_area.contains(i2) == false)
 811                                                 continue;
 812                                         // Check that side is air
 813                                         MapNode *n2 = &vm->m_data[i2];
 814                                         if (ndef->get(*n2).walkable)
 815                                                 continue;
 816                                         // Check that under side is air
 817                                         vm->m_area.add_y(em, i2, -1);
 818                                         if (vm->m_area.contains(i2) == false)
 819                                                 continue;
 820                                         n2 = &vm->m_data[i2];
 821                                         if (ndef->get(*n2).walkable)
 822                                                 continue;
 823                                         // Loop further down until not air
 824                                         bool dropped_to_unknown = false;
 825                                         do {
 826                                                 vm->m_area.add_y(em, i2, -1);
 827                                                 n2 = &vm->m_data[i2];
 828                                                 // if out of known area
 829                                                 if(vm->m_area.contains(i2) == false ||
 830                                                                 n2->getContent() == CONTENT_IGNORE) {
 831                                                         dropped_to_unknown = true;
 832                                                         break;
 833                                                 }
 834                                         } while (ndef->get(*n2).walkable == false);
 835                                         // Loop one up so that we're in air
 836                                         vm->m_area.add_y(em, i2, 1);
 837                                         n2 = &vm->m_data[i2];
 838
 839                                         bool old_is_water = (n->getContent() == c_water_source);
 840                                         // Move mud to new place
 841                                         if (!dropped_to_unknown) {
 842                                                 *n2 = *n;
 843                                                 // Set old place to be air (or water)
 844                                                 if(old_is_water)
 845                                                         *n = MapNode(c_water_source);
 846                                                 else
 847                                                         *n = MapNode(CONTENT_AIR);
 848                                         }
 849
 850                                         // Done
 851                                         break;
 852                                 }
 853                         }
 854                         }
 855                 }
 856         }
 857 }
 858
 859
 860 void MapgenV6::placeTreesAndJungleGrass()
 861 {
 862         //TimeTaker t("placeTrees");
 863         if (node_max.Y < water_level)
 864                 return;
 865
 866         PseudoRandom grassrandom(blockseed + 53);
 867         content_t c_junglegrass = ndef->getId("mapgen_junglegrass");
 868         // if we don't have junglegrass, don't place cignore... that's bad
 869         if (c_junglegrass == CONTENT_IGNORE)
 870                 c_junglegrass = CONTENT_AIR;
 871         MapNode n_junglegrass(c_junglegrass);
 872         v3s16 em = vm->m_area.getExtent();
 873
 874         // Divide area into parts
 875         s16 div = 8;
 876         s16 sidelen = central_area_size.X / div;
 877         double area = sidelen * sidelen;
 878
 879         // N.B.  We must add jungle grass first, since tree leaves will
 880         // obstruct the ground, giving us a false ground level
 881         for (s16 z0 = 0; z0 < div; z0++)
 882         for (s16 x0 = 0; x0 < div; x0++) {
 883                 // Center position of part of division
 884                 v2s16 p2d_center(
 885                         node_min.X + sidelen / 2 + sidelen * x0,
 886                         node_min.Z + sidelen / 2 + sidelen * z0
 887                 );
 888                 // Minimum edge of part of division
 889                 v2s16 p2d_min(
 890                         node_min.X + sidelen * x0,
 891                         node_min.Z + sidelen * z0
 892                 );
 893                 // Maximum edge of part of division
 894                 v2s16 p2d_max(
 895                         node_min.X + sidelen + sidelen * x0 - 1,
 896                         node_min.Z + sidelen + sidelen * z0 - 1
 897                 );
 898
 899                 // Get biome at center position of part of division
 900                 BiomeV6Type bt = getBiome(p2d_center);
 901
 902                 // Amount of trees
 903                 u32 tree_count;
 904                 if (bt == BT_JUNGLE || bt == BT_TAIGA || bt == BT_NORMAL) {
 905                         tree_count = area * getTreeAmount(p2d_center);
 906                         if (bt == BT_JUNGLE)
 907                                 tree_count *= 4;
 908                 } else {
 909                         tree_count = 0;
 910                 }
 911
 912                 // Add jungle grass
 913                 if (bt == BT_JUNGLE) {
 914                         float humidity = getHumidity(p2d_center);
 915                         u32 grass_count = 5 * humidity * tree_count;
 916                         for (u32 i = 0; i < grass_count; i++) {
 917                                 s16 x = grassrandom.range(p2d_min.X, p2d_max.X);
 918                                 s16 z = grassrandom.range(p2d_min.Y, p2d_max.Y);
 919                                 int mapindex = central_area_size.X * (z - node_min.Z)
 920                                                                 + (x - node_min.X);
 921                                 s16 y = heightmap[mapindex];
 922                                 if (y < water_level)
 923                                         continue;
 924
 925                                 u32 vi = vm->m_area.index(x, y, z);
 926                                 // place on dirt_with_grass, since we know it is exposed to sunlight
 927                                 if (vm->m_data[vi].getContent() == c_dirt_with_grass) {
 928                                         vm->m_area.add_y(em, vi, 1);
 929                                         vm->m_data[vi] = n_junglegrass;
 930                                 }
 931                         }
 932                 }
 933
 934                 // Put trees in random places on part of division
 935                 for (u32 i = 0; i < tree_count; i++) {
 936                         s16 x = myrand_range(p2d_min.X, p2d_max.X);
 937                         s16 z = myrand_range(p2d_min.Y, p2d_max.Y);
 938                         int mapindex = central_area_size.X * (z - node_min.Z)
 939                                                         + (x - node_min.X);
 940                         s16 y = heightmap[mapindex];
 941                         // Don't make a tree under water level
 942                         // Don't make a tree so high that it doesn't fit
 943                         if (y < water_level || y > node_max.Y - 6)
 944                                 continue;
 945
 946                         v3s16 p(x, y, z);
 947                         // Trees grow only on mud and grass and snowblock
 948                         {
 949                                 u32 i = vm->m_area.index(p);
 950                                 content_t c = vm->m_data[i].getContent();
 951                                 if (c != c_dirt &&
 952                                                 c != c_dirt_with_grass &&
 953                                                 c != c_dirt_with_snow &&
 954                                                 c != c_snowblock)
 955                                         continue;
 956                         }
 957                         p.Y++;
 958
 959                         // Make a tree
 960                         if (bt == BT_JUNGLE) {
 961                                 treegen::make_jungletree(*vm, p, ndef, myrand());
 962                         } else if (bt == BT_TAIGA) {
 963                                 treegen::make_pine_tree(*vm, p - v3s16(0, 1, 0), ndef, myrand());
 964                         } else if (bt == BT_NORMAL) {
 965                                 bool is_apple_tree = (myrand_range(0, 3) == 0) &&
 966                                                         getHaveAppleTree(v2s16(x, z));
 967                                 treegen::make_tree(*vm, p, is_apple_tree, ndef, myrand());
 968                         }
 969                 }
 970         }
 971         //printf("placeTreesAndJungleGrass: %dms\n", t.stop());
 972 }
 973
 974
 975 void MapgenV6::growGrass() // Add surface nodes
 976 {
 977         MapNode n_dirt_with_grass(c_dirt_with_grass);
 978         MapNode n_dirt_with_snow(c_dirt_with_snow);
 979         MapNode n_snowblock(c_snowblock);
 980         MapNode n_snow(c_snow);
 981         v3s16 em = vm->m_area.getExtent();
 982
 983         u32 index = 0;
 984         for (s16 z = full_node_min.Z; z <= full_node_max.Z; z++)
 985         for (s16 x = full_node_min.X; x <= full_node_max.X; x++, index++) {
 986                 // Find the lowest surface to which enough light ends up to make
 987                 // grass grow.  Basically just wait until not air and not leaves.
 988                 s16 surface_y = 0;
 989                 {
 990                         u32 i = vm->m_area.index(x, node_max.Y, z);
 991                         s16 y;
 992                         // Go to ground level
 993                         for (y = node_max.Y; y >= full_node_min.Y; y--) {
 994                                 MapNode &n = vm->m_data[i];
 995                                 if (ndef->get(n).param_type != CPT_LIGHT ||
 996                                                 ndef->get(n).liquid_type != LIQUID_NONE ||
 997                                                 n.getContent() == c_ice)
 998                                         break;
 999                                 vm->m_area.add_y(em, i, -1);
1000                         }
1001                         surface_y = (y >= full_node_min.Y) ? y : full_node_min.Y;
1002                 }
1003
1004                 BiomeV6Type bt = getBiome(index, v2s16(x, z));
1005                 u32 i = vm->m_area.index(x, surface_y, z);
1006                 content_t c = vm->m_data[i].getContent();
1007                 if (surface_y >= water_level - 20) {
1008                         if (bt == BT_TAIGA && c == c_dirt) {
1009                                 vm->m_data[i] = n_snowblock;
1010                                 vm->m_area.add_y(em, i, -1);
1011                                 vm->m_data[i] = n_dirt_with_snow;
1012                         } else if (bt == BT_TUNDRA) {
1013                                 if (c == c_dirt) {
1014                                         vm->m_data[i] = n_dirt_with_snow;
1015                                 } else if (c == c_stone) {
1016                                         vm->m_area.add_y(em, i, 1);
1017                                         vm->m_data[i] = n_snow;
1018                                 }
1019                         } else if (c == c_dirt) {
1020                                 vm->m_data[i] = n_dirt_with_grass;
1021                         }
1022                 }
1023         }
1024 }
1025
1026
1027 void MapgenV6::generateCaves(int max_stone_y)
1028 {
1029         float cave_amount = NoisePerlin2D(np_cave, node_min.X, node_min.Y, seed);
1030         int volume_nodes = (node_max.X - node_min.X + 1) *
1031                                            (node_max.Y - node_min.Y + 1) * MAP_BLOCKSIZE;
1032         cave_amount = MYMAX(0.0, cave_amount);
1033         u32 caves_count = cave_amount * volume_nodes / 50000;
1034         u32 bruises_count = 1;
1035         PseudoRandom ps(blockseed + 21343);
1036         PseudoRandom ps2(blockseed + 1032);
1037
1038         if (ps.range(1, 6) == 1)
1039                 bruises_count = ps.range(0, ps.range(0, 2));
1040
1041         if (getBiome(v2s16(node_min.X, node_min.Z)) == BT_DESERT) {
1042                 caves_count   /= 3;
1043                 bruises_count /= 3;
1044         }
1045
1046         for (u32 i = 0; i < caves_count + bruises_count; i++) {
1047                 bool large_cave = (i >= caves_count);
1048                 CaveV6 cave(this, &ps, &ps2, large_cave);
1049
1050                 cave.makeCave(node_min, node_max, max_stone_y);
1051         }
1052 }