src/mapgen_v6.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2015 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 "voxelalgorithms.h"
  30 //#include "profiler.h" // For TimeTaker
  31 #include "settings.h" // For g_settings
  32 #include "emerge.h"
  33 #include "dungeongen.h"
  34 #include "cavegen.h"
  35 #include "treegen.h"
  36 #include "mg_ore.h"
  37 #include "mg_decoration.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         {"snowbiomes", MGV6_SNOWBIOMES},
  45         {NULL,         0}
  46 };
  47
  48 ///////////////////////////////////////////////////////////////////////////////
  49
  50
  51 MapgenV6::MapgenV6(int mapgenid, MapgenParams *params, EmergeManager *emerge)
  52         : Mapgen(mapgenid, params, emerge)
  53 {
  54         this->m_emerge = emerge;
  55         this->ystride = csize.X; //////fix this
  56
  57         this->heightmap = new s16[csize.X * csize.Z];
  58
  59         MapgenV6Params *sp = (MapgenV6Params *)params->sparams;
  60         this->spflags     = sp->spflags;
  61         this->freq_desert = sp->freq_desert;
  62         this->freq_beach  = sp->freq_beach;
  63
  64         np_cave        = &sp->np_cave;
  65         np_humidity    = &sp->np_humidity;
  66         np_trees       = &sp->np_trees;
  67         np_apple_trees = &sp->np_apple_trees;
  68
  69         //// Create noise objects
  70         noise_terrain_base   = new Noise(&sp->np_terrain_base,   seed, csize.X, csize.Y);
  71         noise_terrain_higher = new Noise(&sp->np_terrain_higher, seed, csize.X, csize.Y);
  72         noise_steepness      = new Noise(&sp->np_steepness,      seed, csize.X, csize.Y);
  73         noise_height_select  = new Noise(&sp->np_height_select,  seed, csize.X, csize.Y);
  74         noise_mud            = new Noise(&sp->np_mud,            seed, csize.X, csize.Y);
  75         noise_beach          = new Noise(&sp->np_beach,          seed, csize.X, csize.Y);
  76         noise_biome          = new Noise(&sp->np_biome,          seed,
  77                         csize.X + 2 * MAP_BLOCKSIZE, csize.Y + 2 * MAP_BLOCKSIZE);
  78         noise_humidity       = new Noise(&sp->np_humidity,       seed,
  79                         csize.X + 2 * MAP_BLOCKSIZE, csize.Y + 2 * MAP_BLOCKSIZE);
  80
  81         //// Resolve nodes to be used
  82         INodeDefManager *ndef = emerge->ndef;
  83
  84         c_stone           = ndef->getId("mapgen_stone");
  85         c_dirt            = ndef->getId("mapgen_dirt");
  86         c_dirt_with_grass = ndef->getId("mapgen_dirt_with_grass");
  87         c_sand            = ndef->getId("mapgen_sand");
  88         c_water_source    = ndef->getId("mapgen_water_source");
  89         c_lava_source     = ndef->getId("mapgen_lava_source");
  90         c_gravel          = ndef->getId("mapgen_gravel");
  91         c_desert_stone    = ndef->getId("mapgen_desert_stone");
  92         c_desert_sand     = ndef->getId("mapgen_desert_sand");
  93         c_dirt_with_snow  = ndef->getId("mapgen_dirt_with_snow");
  94         c_snow            = ndef->getId("mapgen_snow");
  95         c_snowblock       = ndef->getId("mapgen_snowblock");
  96         c_ice             = ndef->getId("mapgen_ice");
  97
  98         c_cobble          = ndef->getId("mapgen_cobble");
  99         c_stair_cobble    = ndef->getId("mapgen_stair_cobble");
 100         c_mossycobble     = ndef->getId("mapgen_mossycobble");
 101
 102         if (c_desert_sand == CONTENT_IGNORE)
 103                 c_desert_sand = c_sand;
 104         if (c_desert_stone == CONTENT_IGNORE)
 105                 c_desert_stone = c_stone;
 106         if (c_mossycobble == CONTENT_IGNORE)
 107                 c_mossycobble = c_cobble;
 108         if (c_stair_cobble == CONTENT_IGNORE)
 109                 c_stair_cobble = c_cobble;
 110         if (c_dirt_with_snow == CONTENT_IGNORE)
 111                 c_dirt_with_snow = c_dirt_with_grass;
 112         if (c_snow == CONTENT_IGNORE)
 113                 c_snow = CONTENT_AIR;
 114         if (c_snowblock == CONTENT_IGNORE)
 115                 c_snowblock = c_dirt_with_grass;
 116         if (c_ice == CONTENT_IGNORE)
 117                 c_ice = c_water_source;
 118 }
 119
 120
 121 MapgenV6::~MapgenV6()
 122 {
 123         delete noise_terrain_base;
 124         delete noise_terrain_higher;
 125         delete noise_steepness;
 126         delete noise_height_select;
 127         delete noise_mud;
 128         delete noise_beach;
 129         delete noise_biome;
 130         delete noise_humidity;
 131
 132         delete[] heightmap;
 133 }
 134
 135
 136 MapgenV6Params::MapgenV6Params()
 137 {
 138         spflags     = MGV6_BIOMEBLEND | MGV6_MUDFLOW;
 139         freq_desert = 0.45;
 140         freq_beach  = 0.15;
 141
 142         np_terrain_base   = NoiseParams(-4,   20.0, v3f(250.0, 250.0, 250.0), 82341,  5, 0.6,  2.0);
 143         np_terrain_higher = NoiseParams(20,   16.0, v3f(500.0, 500.0, 500.0), 85039,  5, 0.6,  2.0);
 144         np_steepness      = NoiseParams(0.85, 0.5,  v3f(125.0, 125.0, 125.0), -932,   5, 0.7,  2.0);
 145         np_height_select  = NoiseParams(0,    1.0,  v3f(250.0, 250.0, 250.0), 4213,   5, 0.69, 2.0);
 146         np_mud            = NoiseParams(4,    2.0,  v3f(200.0, 200.0, 200.0), 91013,  3, 0.55, 2.0);
 147         np_beach          = NoiseParams(0,    1.0,  v3f(250.0, 250.0, 250.0), 59420,  3, 0.50, 2.0);
 148         np_biome          = NoiseParams(0,    1.0,  v3f(500.0, 500.0, 500.0), 9130,   3, 0.50, 2.0);
 149         np_cave           = NoiseParams(6,    6.0,  v3f(250.0, 250.0, 250.0), 34329,  3, 0.50, 2.0);
 150         np_humidity       = NoiseParams(0.5,  0.5,  v3f(500.0, 500.0, 500.0), 72384,  3, 0.50, 2.0);
 151         np_trees          = NoiseParams(0,    1.0,  v3f(125.0, 125.0, 125.0), 2,      4, 0.66, 2.0);
 152         np_apple_trees    = NoiseParams(0,    1.0,  v3f(100.0, 100.0, 100.0), 342902, 3, 0.45, 2.0);
 153 }
 154
 155
 156 void MapgenV6Params::readParams(const Settings *settings)
 157 {
 158         settings->getFlagStrNoEx("mgv6_spflags", spflags, flagdesc_mapgen_v6);
 159         settings->getFloatNoEx("mgv6_freq_desert", freq_desert);
 160         settings->getFloatNoEx("mgv6_freq_beach",  freq_beach);
 161
 162         settings->getNoiseParams("mgv6_np_terrain_base",   np_terrain_base);
 163         settings->getNoiseParams("mgv6_np_terrain_higher", np_terrain_higher);
 164         settings->getNoiseParams("mgv6_np_steepness",      np_steepness);
 165         settings->getNoiseParams("mgv6_np_height_select",  np_height_select);
 166         settings->getNoiseParams("mgv6_np_mud",            np_mud);
 167         settings->getNoiseParams("mgv6_np_beach",          np_beach);
 168         settings->getNoiseParams("mgv6_np_biome",          np_biome);
 169         settings->getNoiseParams("mgv6_np_cave",           np_cave);
 170         settings->getNoiseParams("mgv6_np_humidity",       np_humidity);
 171         settings->getNoiseParams("mgv6_np_trees",          np_trees);
 172         settings->getNoiseParams("mgv6_np_apple_trees",    np_apple_trees);
 173 }
 174
 175
 176 void MapgenV6Params::writeParams(Settings *settings) const
 177 {
 178         settings->setFlagStr("mgv6_spflags", spflags, flagdesc_mapgen_v6, U32_MAX);
 179         settings->setFloat("mgv6_freq_desert", freq_desert);
 180         settings->setFloat("mgv6_freq_beach",  freq_beach);
 181
 182         settings->setNoiseParams("mgv6_np_terrain_base",   np_terrain_base);
 183         settings->setNoiseParams("mgv6_np_terrain_higher", np_terrain_higher);
 184         settings->setNoiseParams("mgv6_np_steepness",      np_steepness);
 185         settings->setNoiseParams("mgv6_np_height_select",  np_height_select);
 186         settings->setNoiseParams("mgv6_np_mud",            np_mud);
 187         settings->setNoiseParams("mgv6_np_beach",          np_beach);
 188         settings->setNoiseParams("mgv6_np_biome",          np_biome);
 189         settings->setNoiseParams("mgv6_np_cave",           np_cave);
 190         settings->setNoiseParams("mgv6_np_humidity",       np_humidity);
 191         settings->setNoiseParams("mgv6_np_trees",          np_trees);
 192         settings->setNoiseParams("mgv6_np_apple_trees",    np_apple_trees);
 193 }
 194
 195
 196 //////////////////////// Some helper functions for the map generator
 197
 198
 199 // Returns Y one under area minimum if not found
 200 s16 MapgenV6::find_stone_level(v2s16 p2d)
 201 {
 202         v3s16 em = vm->m_area.getExtent();
 203         s16 y_nodes_max = vm->m_area.MaxEdge.Y;
 204         s16 y_nodes_min = vm->m_area.MinEdge.Y;
 205         u32 i = vm->m_area.index(p2d.X, y_nodes_max, p2d.Y);
 206         s16 y;
 207
 208         for (y = y_nodes_max; y >= y_nodes_min; y--) {
 209                 content_t c = vm->m_data[i].getContent();
 210                 if (c != CONTENT_IGNORE && (c == c_stone || c == c_desert_stone))
 211                         break;
 212
 213                 vm->m_area.add_y(em, i, -1);
 214         }
 215         return (y >= y_nodes_min) ? y : y_nodes_min - 1;
 216 }
 217
 218
 219 // Required by mapgen.h
 220 bool MapgenV6::block_is_underground(u64 seed, v3s16 blockpos)
 221 {
 222         /*s16 minimum_groundlevel = (s16)get_sector_minimum_ground_level(
 223                         seed, v2s16(blockpos.X, blockpos.Z));*/
 224         // Nah, this is just a heuristic, just return something
 225         s16 minimum_groundlevel = water_level;
 226
 227         if(blockpos.Y * MAP_BLOCKSIZE + MAP_BLOCKSIZE <= minimum_groundlevel)
 228                 return true;
 229         else
 230                 return false;
 231 }
 232
 233
 234 //////////////////////// Base terrain height functions
 235
 236 float MapgenV6::baseTerrainLevel(float terrain_base, float terrain_higher,
 237         float steepness, float height_select)
 238 {
 239         float base   = 1 + terrain_base;
 240         float higher = 1 + terrain_higher;
 241
 242         // Limit higher ground level to at least base
 243         if(higher < base)
 244                 higher = base;
 245
 246         // Steepness factor of cliffs
 247         float b = steepness;
 248         b = rangelim(b, 0.0, 1000.0);
 249         b = 5 * b * b * b * b * b * b * b;
 250         b = rangelim(b, 0.5, 1000.0);
 251
 252         // Values 1.5...100 give quite horrible looking slopes
 253         if (b > 1.5 && b < 100.0)
 254                 b = (b < 10.0) ? 1.5 : 100.0;
 255
 256         float a_off = -0.20; // Offset to more low
 257         float a = 0.5 + b * (a_off + height_select);
 258         a = rangelim(a, 0.0, 1.0); // Limit
 259
 260         return base * (1.0 - a) + higher * a;
 261 }
 262
 263
 264 float MapgenV6::baseTerrainLevelFromNoise(v2s16 p)
 265 {
 266         if (flags & MG_FLAT)
 267                 return water_level;
 268
 269         float terrain_base   = NoisePerlin2D_PO(&noise_terrain_base->np,
 270                                                         p.X, 0.5, p.Y, 0.5, seed);
 271         float terrain_higher = NoisePerlin2D_PO(&noise_terrain_higher->np,
 272                                                         p.X, 0.5, p.Y, 0.5, seed);
 273         float steepness      = NoisePerlin2D_PO(&noise_steepness->np,
 274                                                         p.X, 0.5, p.Y, 0.5, seed);
 275         float height_select  = NoisePerlin2D_PO(&noise_height_select->np,
 276                                                         p.X, 0.5, p.Y, 0.5, seed);
 277
 278         return baseTerrainLevel(terrain_base, terrain_higher,
 279                                                         steepness, height_select);
 280 }
 281
 282
 283 float MapgenV6::baseTerrainLevelFromMap(v2s16 p)
 284 {
 285         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 286         return baseTerrainLevelFromMap(index);
 287 }
 288
 289
 290 float MapgenV6::baseTerrainLevelFromMap(int index)
 291 {
 292         if (flags & MG_FLAT)
 293                 return water_level;
 294
 295         float terrain_base   = noise_terrain_base->result[index];
 296         float terrain_higher = noise_terrain_higher->result[index];
 297         float steepness      = noise_steepness->result[index];
 298         float height_select  = noise_height_select->result[index];
 299
 300         return baseTerrainLevel(terrain_base, terrain_higher,
 301                                                         steepness, height_select);
 302 }
 303
 304
 305 s16 MapgenV6::find_ground_level_from_noise(u64 seed, v2s16 p2d, s16 precision)
 306 {
 307         return baseTerrainLevelFromNoise(p2d) + MGV6_AVERAGE_MUD_AMOUNT;
 308 }
 309
 310
 311 int MapgenV6::getGroundLevelAtPoint(v2s16 p)
 312 {
 313         return baseTerrainLevelFromNoise(p) + MGV6_AVERAGE_MUD_AMOUNT;
 314 }
 315
 316
 317 //////////////////////// Noise functions
 318
 319 float MapgenV6::getMudAmount(v2s16 p)
 320 {
 321         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 322         return getMudAmount(index);
 323 }
 324
 325
 326 bool MapgenV6::getHaveBeach(v2s16 p)
 327 {
 328         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 329         return getHaveBeach(index);
 330 }
 331
 332
 333 BiomeV6Type MapgenV6::getBiome(v2s16 p)
 334 {
 335         int index = (p.Y - full_node_min.Z) * (ystride + 2 * MAP_BLOCKSIZE)
 336                         + (p.X - full_node_min.X);
 337         return getBiome(index, p);
 338 }
 339
 340
 341 float MapgenV6::getHumidity(v2s16 p)
 342 {
 343         /*double noise = noise2d_perlin(
 344                 0.5+(float)p.X/500, 0.5+(float)p.Y/500,
 345                 seed+72384, 4, 0.66);
 346         noise = (noise + 1.0)/2.0;*/
 347
 348         int index = (p.Y - full_node_min.Z) * (ystride + 2 * MAP_BLOCKSIZE)
 349                         + (p.X - full_node_min.X);
 350         float noise = noise_humidity->result[index];
 351
 352         if (noise < 0.0)
 353                 noise = 0.0;
 354         if (noise > 1.0)
 355                 noise = 1.0;
 356         return noise;
 357 }
 358
 359
 360 float MapgenV6::getTreeAmount(v2s16 p)
 361 {
 362         /*double noise = noise2d_perlin(
 363                         0.5+(float)p.X/125, 0.5+(float)p.Y/125,
 364                         seed+2, 4, 0.66);*/
 365
 366         float noise = NoisePerlin2D(np_trees, p.X, p.Y, seed);
 367         float zeroval = -0.39;
 368         if (noise < zeroval)
 369                 return 0;
 370         else
 371                 return 0.04 * (noise - zeroval) / (1.0 - zeroval);
 372 }
 373
 374
 375 bool MapgenV6::getHaveAppleTree(v2s16 p)
 376 {
 377         /*is_apple_tree = noise2d_perlin(
 378                 0.5+(float)p.X/100, 0.5+(float)p.Z/100,
 379                 data->seed+342902, 3, 0.45) > 0.2;*/
 380
 381         float noise = NoisePerlin2D(np_apple_trees, p.X, p.Y, seed);
 382
 383         return noise > 0.2;
 384 }
 385
 386
 387 float MapgenV6::getMudAmount(int index)
 388 {
 389         if (flags & MG_FLAT)
 390                 return MGV6_AVERAGE_MUD_AMOUNT;
 391
 392         /*return ((float)AVERAGE_MUD_AMOUNT + 2.0 * noise2d_perlin(
 393                         0.5+(float)p.X/200, 0.5+(float)p.Y/200,
 394                         seed+91013, 3, 0.55));*/
 395
 396         return noise_mud->result[index];
 397 }
 398
 399
 400 bool MapgenV6::getHaveBeach(int index)
 401 {
 402         // Determine whether to have sand here
 403         /*double sandnoise = noise2d_perlin(
 404                         0.2+(float)p2d.X/250, 0.7+(float)p2d.Y/250,
 405                         seed+59420, 3, 0.50);*/
 406
 407         float sandnoise = noise_beach->result[index];
 408         return (sandnoise > freq_beach);
 409 }
 410
 411
 412 BiomeV6Type MapgenV6::getBiome(int index, v2s16 p)
 413 {
 414         // Just do something very simple as for now
 415         /*double d = noise2d_perlin(
 416                         0.6+(float)p2d.X/250, 0.2+(float)p2d.Y/250,
 417                         seed+9130, 3, 0.50);*/
 418
 419         float d = noise_biome->result[index];
 420         float h = noise_humidity->result[index];
 421
 422         if (spflags & MGV6_SNOWBIOMES) {
 423                 float blend = (spflags & MGV6_BIOMEBLEND) ? noise2d(p.X, p.Y, seed) / 40 : 0;
 424
 425                 if (d > MGV6_FREQ_HOT + blend) {
 426                         if (h > MGV6_FREQ_JUNGLE + blend)
 427                                 return BT_JUNGLE;
 428                         else
 429                                 return BT_DESERT;
 430                 } else if (d < MGV6_FREQ_SNOW + blend) {
 431                         if (h > MGV6_FREQ_TAIGA + blend)
 432                                 return BT_TAIGA;
 433                         else
 434                                 return BT_TUNDRA;
 435                 } else {
 436                         return BT_NORMAL;
 437                 }
 438         } else {
 439                 if (d > freq_desert)
 440                         return BT_DESERT;
 441
 442                 if ((spflags & MGV6_BIOMEBLEND) && (d > freq_desert - 0.10) &&
 443                                 ((noise2d(p.X, p.Y, seed) + 1.0) > (freq_desert - d) * 20.0))
 444                         return BT_DESERT;
 445
 446                 if ((spflags & MGV6_JUNGLES) && h > 0.75)
 447                         return BT_JUNGLE;
 448                 else
 449                         return BT_NORMAL;
 450         }
 451 }
 452
 453
 454 u32 MapgenV6::get_blockseed(u64 seed, v3s16 p)
 455 {
 456         s32 x = p.X, y = p.Y, z = p.Z;
 457         return (u32)(seed % 0x100000000ULL) + z * 38134234 + y * 42123 + x * 23;
 458 }
 459
 460
 461 //////////////////////// Map generator
 462
 463 void MapgenV6::makeChunk(BlockMakeData *data)
 464 {
 465         // Pre-conditions
 466         assert(data->vmanip);
 467         assert(data->nodedef);
 468         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 469                    data->blockpos_requested.Y >= data->blockpos_min.Y &&
 470                    data->blockpos_requested.Z >= data->blockpos_min.Z);
 471         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 472                    data->blockpos_requested.Y <= data->blockpos_max.Y &&
 473                    data->blockpos_requested.Z <= data->blockpos_max.Z);
 474
 475         this->generating = true;
 476         this->vm   = data->vmanip;
 477         this->ndef = data->nodedef;
 478
 479         // Hack: use minimum block coords for old code that assumes a single block
 480         v3s16 blockpos_min = data->blockpos_min;
 481         v3s16 blockpos_max = data->blockpos_max;
 482
 483         // Area of central chunk
 484         node_min = blockpos_min * MAP_BLOCKSIZE;
 485         node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 486
 487         // Full allocated area
 488         full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
 489         full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 490
 491         central_area_size = node_max - node_min + v3s16(1, 1, 1);
 492         assert(central_area_size.X == central_area_size.Z);
 493
 494         int volume_blocks = (blockpos_max.X - blockpos_min.X + 1)
 495                                           * (blockpos_max.Y - blockpos_min.Y + 1)
 496                                           * (blockpos_max.Z - blockpos_max.Z + 1);
 497
 498         volume_nodes = volume_blocks *
 499                 MAP_BLOCKSIZE * MAP_BLOCKSIZE * MAP_BLOCKSIZE;
 500
 501         // Create a block-specific seed
 502         blockseed = get_blockseed(data->seed, full_node_min);
 503
 504         // Make some noise
 505         calculateNoise();
 506
 507         // Maximum height of the stone surface and obstacles.
 508         // This is used to guide the cave generation
 509         s16 stone_surface_max_y;
 510
 511         // Generate general ground level to full area
 512         stone_surface_max_y = generateGround();
 513
 514         // Create initial heightmap to limit caves
 515         updateHeightmap(node_min, node_max);
 516
 517         const s16 max_spread_amount = MAP_BLOCKSIZE;
 518         // Limit dirt flow area by 1 because mud is flown into neighbors.
 519         s16 mudflow_minpos = -max_spread_amount + 1;
 520         s16 mudflow_maxpos = central_area_size.X + max_spread_amount - 2;
 521
 522         // Loop this part, it will make stuff look older and newer nicely
 523         const u32 age_loops = 2;
 524         for (u32 i_age = 0; i_age < age_loops; i_age++) { // Aging loop
 525                 // Make caves (this code is relatively horrible)
 526                 if (flags & MG_CAVES)
 527                         generateCaves(stone_surface_max_y);
 528
 529                 // Add mud to the central chunk
 530                 addMud();
 531
 532                 // Flow mud away from steep edges
 533                 if (spflags & MGV6_MUDFLOW)
 534                         flowMud(mudflow_minpos, mudflow_maxpos);
 535
 536         }
 537
 538         // Update heightmap after mudflow
 539         updateHeightmap(node_min, node_max);
 540
 541         // Add dungeons
 542         if ((flags & MG_DUNGEONS) && (stone_surface_max_y >= node_min.Y)) {
 543                 DungeonParams dp;
 544
 545                 dp.np_rarity  = nparams_dungeon_rarity;
 546                 dp.np_density = nparams_dungeon_density;
 547                 dp.np_wetness = nparams_dungeon_wetness;
 548                 dp.c_water    = c_water_source;
 549                 if (getBiome(0, v2s16(node_min.X, node_min.Z)) == BT_DESERT) {
 550                         dp.c_cobble = c_desert_stone;
 551                         dp.c_moss   = c_desert_stone;
 552                         dp.c_stair  = c_desert_stone;
 553
 554                         dp.diagonal_dirs = true;
 555                         dp.mossratio     = 0.0;
 556                         dp.holesize      = v3s16(2, 3, 2);
 557                         dp.roomsize      = v3s16(2, 5, 2);
 558                         dp.notifytype    = GENNOTIFY_TEMPLE;
 559                 } else {
 560                         dp.c_cobble = c_cobble;
 561                         dp.c_moss   = c_mossycobble;
 562                         dp.c_stair  = c_stair_cobble;
 563
 564                         dp.diagonal_dirs = false;
 565                         dp.mossratio     = 3.0;
 566                         dp.holesize      = v3s16(1, 2, 1);
 567                         dp.roomsize      = v3s16(0, 0, 0);
 568                         dp.notifytype    = GENNOTIFY_DUNGEON;
 569                 }
 570
 571                 DungeonGen dgen(this, &dp);
 572                 dgen.generate(blockseed, full_node_min, full_node_max);
 573         }
 574
 575         // Add top and bottom side of water to transforming_liquid queue
 576         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 577
 578         // Add surface nodes
 579         growGrass();
 580
 581         // Generate some trees, and add grass, if a jungle
 582         if (flags & MG_TREES)
 583                 placeTreesAndJungleGrass();
 584
 585         // Generate the registered decorations
 586         m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
 587
 588         // Generate the registered ores
 589         m_emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
 590
 591         // Calculate lighting
 592         if (flags & MG_LIGHT)
 593                 calcLighting(node_min, node_max);
 594
 595         this->generating = false;
 596 }
 597
 598
 599 void MapgenV6::calculateNoise()
 600 {
 601         int x = node_min.X;
 602         int z = node_min.Z;
 603         int fx = full_node_min.X;
 604         int fz = full_node_min.Z;
 605
 606         if (!(flags & MG_FLAT)) {
 607                 noise_terrain_base->perlinMap2D_PO(x, 0.5, z, 0.5);
 608                 noise_terrain_higher->perlinMap2D_PO(x, 0.5, z, 0.5);
 609                 noise_steepness->perlinMap2D_PO(x, 0.5, z, 0.5);
 610                 noise_height_select->perlinMap2D_PO(x, 0.5, z, 0.5);
 611                 noise_mud->perlinMap2D_PO(x, 0.5, z, 0.5);
 612         }
 613
 614         noise_beach->perlinMap2D_PO(x, 0.2, z, 0.7);
 615
 616         noise_biome->perlinMap2D_PO(fx, 0.6, fz, 0.2);
 617         noise_humidity->perlinMap2D_PO(fx, 0.0, fz, 0.0);
 618         // Humidity map does not need range limiting 0 to 1,
 619         // only humidity at point does
 620 }
 621
 622
 623 int MapgenV6::generateGround()
 624 {
 625         //TimeTaker timer1("Generating ground level");
 626         MapNode n_air(CONTENT_AIR), n_water_source(c_water_source);
 627         MapNode n_stone(c_stone), n_desert_stone(c_desert_stone);
 628         MapNode n_ice(c_ice);
 629         int stone_surface_max_y = -MAX_MAP_GENERATION_LIMIT;
 630
 631         u32 index = 0;
 632         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 633         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 634                 // Surface height
 635                 s16 surface_y = (s16)baseTerrainLevelFromMap(index);
 636
 637                 // Log it
 638                 if (surface_y > stone_surface_max_y)
 639                         stone_surface_max_y = surface_y;
 640
 641                 BiomeV6Type bt = getBiome(v2s16(x, z));
 642
 643                 // Fill ground with stone
 644                 v3s16 em = vm->m_area.getExtent();
 645                 u32 i = vm->m_area.index(x, node_min.Y, z);
 646                 for (s16 y = node_min.Y; y <= node_max.Y; y++) {
 647                         if (vm->m_data[i].getContent() == CONTENT_IGNORE) {
 648                                 if (y <= surface_y) {
 649                                         vm->m_data[i] = (y >= MGV6_DESERT_STONE_BASE
 650                                                         && bt == BT_DESERT) ?
 651                                                 n_desert_stone : n_stone;
 652                                 } else if (y <= water_level) {
 653                                         vm->m_data[i] = (y >= MGV6_ICE_BASE
 654                                                         && bt == BT_TUNDRA) ?
 655                                                 n_ice : n_water_source;
 656                                 } else {
 657                                         vm->m_data[i] = n_air;
 658                                 }
 659                         }
 660                         vm->m_area.add_y(em, i, 1);
 661                 }
 662         }
 663
 664         return stone_surface_max_y;
 665 }
 666
 667
 668 void MapgenV6::addMud()
 669 {
 670         // 15ms @cs=8
 671         //TimeTaker timer1("add mud");
 672         MapNode n_dirt(c_dirt), n_gravel(c_gravel);
 673         MapNode n_sand(c_sand), n_desert_sand(c_desert_sand);
 674         MapNode addnode;
 675
 676         u32 index = 0;
 677         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 678         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 679                 // Randomize mud amount
 680                 s16 mud_add_amount = getMudAmount(index) / 2.0 + 0.5;
 681
 682                 // Find ground level
 683                 s16 surface_y = find_stone_level(v2s16(x, z)); /////////////////optimize this!
 684
 685                 // Handle area not found
 686                 if (surface_y == vm->m_area.MinEdge.Y - 1)
 687                         continue;
 688
 689                 BiomeV6Type bt = getBiome(v2s16(x, z));
 690                 addnode = (bt == BT_DESERT) ? n_desert_sand : n_dirt;
 691
 692                 if (bt == BT_DESERT && surface_y + mud_add_amount <= water_level + 1) {
 693                         addnode = n_sand;
 694                 } else if (mud_add_amount <= 0) {
 695                         mud_add_amount = 1 - mud_add_amount;
 696                         addnode = n_gravel;
 697                 } else if (bt != BT_DESERT && getHaveBeach(index) &&
 698                                 surface_y + mud_add_amount <= water_level + 2) {
 699                         addnode = n_sand;
 700                 }
 701
 702                 if ((bt == BT_DESERT || bt == BT_TUNDRA) && surface_y > 20)
 703                         mud_add_amount = MYMAX(0, mud_add_amount - (surface_y - 20) / 5);
 704
 705                 /* If topmost node is grass, change it to mud.  It might be if it was
 706                 // flown to there from a neighboring chunk and then converted.
 707                 u32 i = vm->m_area.index(x, surface_y, z);
 708                 if (vm->m_data[i].getContent() == c_dirt_with_grass)
 709                         vm->m_data[i] = n_dirt;*/
 710
 711                 // Add mud on ground
 712                 s16 mudcount = 0;
 713                 v3s16 em = vm->m_area.getExtent();
 714                 s16 y_start = surface_y + 1;
 715                 u32 i = vm->m_area.index(x, y_start, z);
 716                 for (s16 y = y_start; y <= node_max.Y; y++) {
 717                         if (mudcount >= mud_add_amount)
 718                                 break;
 719
 720                         vm->m_data[i] = addnode;
 721                         mudcount++;
 722
 723                         vm->m_area.add_y(em, i, 1);
 724                 }
 725         }
 726 }
 727
 728
 729 void MapgenV6::flowMud(s16 &mudflow_minpos, s16 &mudflow_maxpos)
 730 {
 731         // 340ms @cs=8
 732         //TimeTaker timer1("flow mud");
 733
 734         // Iterate a few times
 735         for (s16 k = 0; k < 3; k++) {
 736                 for (s16 z = mudflow_minpos; z <= mudflow_maxpos; z++)
 737                 for (s16 x = mudflow_minpos; x <= mudflow_maxpos; x++) {
 738                         // Invert coordinates every 2nd iteration
 739                         if (k % 2 == 0) {
 740                                 x = mudflow_maxpos - (x - mudflow_minpos);
 741                                 z = mudflow_maxpos - (z - mudflow_minpos);
 742                         }
 743
 744                         // Node position in 2d
 745                         v2s16 p2d = v2s16(node_min.X, node_min.Z) + v2s16(x, z);
 746
 747                         v3s16 em = vm->m_area.getExtent();
 748                         u32 i = vm->m_area.index(p2d.X, node_max.Y, p2d.Y);
 749                         s16 y = node_max.Y;
 750
 751                         while (y >= node_min.Y) {
 752
 753                         for (;; y--) {
 754                                 MapNode *n = NULL;
 755                                 // Find mud
 756                                 for (; y >= node_min.Y; y--) {
 757                                         n = &vm->m_data[i];
 758                                         if (n->getContent() == c_dirt ||
 759                                                         n->getContent() == c_dirt_with_grass ||
 760                                                         n->getContent() == c_gravel)
 761                                                 break;
 762
 763                                         vm->m_area.add_y(em, i, -1);
 764                                 }
 765
 766                                 // Stop if out of area
 767                                 //if(vmanip.m_area.contains(i) == false)
 768                                 if (y < node_min.Y)
 769                                         break;
 770
 771                                 if (n->getContent() == c_dirt ||
 772                                                 n->getContent() == c_dirt_with_grass) {
 773                                         // Make it exactly mud
 774                                         n->setContent(c_dirt);
 775
 776                                         // Don't flow it if the stuff under it is not mud
 777                                         {
 778                                                 u32 i2 = i;
 779                                                 vm->m_area.add_y(em, i2, -1);
 780                                                 // Cancel if out of area
 781                                                 if (vm->m_area.contains(i2) == false)
 782                                                         continue;
 783                                                 MapNode *n2 = &vm->m_data[i2];
 784                                                 if (n2->getContent() != c_dirt &&
 785                                                                 n2->getContent() != c_dirt_with_grass)
 786                                                         continue;
 787                                         }
 788                                 }
 789
 790                                 v3s16 dirs4[4] = {
 791                                         v3s16(0, 0, 1), // back
 792                                         v3s16(1, 0, 0), // right
 793                                         v3s16(0, 0, -1), // front
 794                                         v3s16(-1, 0, 0), // left
 795                                 };
 796
 797                                 // Check that upper is air or doesn't exist.
 798                                 // Cancel dropping if upper keeps it in place
 799                                 u32 i3 = i;
 800                                 vm->m_area.add_y(em, i3, 1);
 801                                 if (vm->m_area.contains(i3) == true &&
 802                                                 ndef->get(vm->m_data[i3]).walkable)
 803                                         continue;
 804
 805                                 // Drop mud on side
 806                                 for(u32 di = 0; di < 4; di++) {
 807                                         v3s16 dirp = dirs4[di];
 808                                         u32 i2 = i;
 809                                         // Move to side
 810                                         vm->m_area.add_p(em, i2, dirp);
 811                                         // Fail if out of area
 812                                         if (vm->m_area.contains(i2) == false)
 813                                                 continue;
 814                                         // Check that side is air
 815                                         MapNode *n2 = &vm->m_data[i2];
 816                                         if (ndef->get(*n2).walkable)
 817                                                 continue;
 818                                         // Check that under side is air
 819                                         vm->m_area.add_y(em, i2, -1);
 820                                         if (vm->m_area.contains(i2) == false)
 821                                                 continue;
 822                                         n2 = &vm->m_data[i2];
 823                                         if (ndef->get(*n2).walkable)
 824                                                 continue;
 825                                         // Loop further down until not air
 826                                         bool dropped_to_unknown = false;
 827                                         do {
 828                                                 vm->m_area.add_y(em, i2, -1);
 829                                                 n2 = &vm->m_data[i2];
 830                                                 // if out of known area
 831                                                 if(vm->m_area.contains(i2) == false ||
 832                                                                 n2->getContent() == CONTENT_IGNORE) {
 833                                                         dropped_to_unknown = true;
 834                                                         break;
 835                                                 }
 836                                         } while (ndef->get(*n2).walkable == false);
 837                                         // Loop one up so that we're in air
 838                                         vm->m_area.add_y(em, i2, 1);
 839                                         n2 = &vm->m_data[i2];
 840
 841                                         bool old_is_water = (n->getContent() == c_water_source);
 842                                         // Move mud to new place
 843                                         if (!dropped_to_unknown) {
 844                                                 *n2 = *n;
 845                                                 // Set old place to be air (or water)
 846                                                 if(old_is_water)
 847                                                         *n = MapNode(c_water_source);
 848                                                 else
 849                                                         *n = MapNode(CONTENT_AIR);
 850                                         }
 851
 852                                         // Done
 853                                         break;
 854                                 }
 855                         }
 856                         }
 857                 }
 858         }
 859 }
 860
 861
 862 void MapgenV6::placeTreesAndJungleGrass()
 863 {
 864         //TimeTaker t("placeTrees");
 865         if (node_max.Y < water_level)
 866                 return;
 867
 868         PseudoRandom grassrandom(blockseed + 53);
 869         content_t c_junglegrass = ndef->getId("mapgen_junglegrass");
 870         // if we don't have junglegrass, don't place cignore... that's bad
 871         if (c_junglegrass == CONTENT_IGNORE)
 872                 c_junglegrass = CONTENT_AIR;
 873         MapNode n_junglegrass(c_junglegrass);
 874         v3s16 em = vm->m_area.getExtent();
 875
 876         // Divide area into parts
 877         s16 div = 8;
 878         s16 sidelen = central_area_size.X / div;
 879         double area = sidelen * sidelen;
 880
 881         // N.B.  We must add jungle grass first, since tree leaves will
 882         // obstruct the ground, giving us a false ground level
 883         for (s16 z0 = 0; z0 < div; z0++)
 884         for (s16 x0 = 0; x0 < div; x0++) {
 885                 // Center position of part of division
 886                 v2s16 p2d_center(
 887                         node_min.X + sidelen / 2 + sidelen * x0,
 888                         node_min.Z + sidelen / 2 + sidelen * z0
 889                 );
 890                 // Minimum edge of part of division
 891                 v2s16 p2d_min(
 892                         node_min.X + sidelen * x0,
 893                         node_min.Z + sidelen * z0
 894                 );
 895                 // Maximum edge of part of division
 896                 v2s16 p2d_max(
 897                         node_min.X + sidelen + sidelen * x0 - 1,
 898                         node_min.Z + sidelen + sidelen * z0 - 1
 899                 );
 900
 901                 // Get biome at center position of part of division
 902                 BiomeV6Type bt = getBiome(p2d_center);
 903
 904                 // Amount of trees
 905                 u32 tree_count;
 906                 if (bt == BT_JUNGLE || bt == BT_TAIGA || bt == BT_NORMAL) {
 907                         tree_count = area * getTreeAmount(p2d_center);
 908                         if (bt == BT_JUNGLE)
 909                                 tree_count *= 4;
 910                 } else {
 911                         tree_count = 0;
 912                 }
 913
 914                 // Add jungle grass
 915                 if (bt == BT_JUNGLE) {
 916                         float humidity = getHumidity(p2d_center);
 917                         u32 grass_count = 5 * humidity * tree_count;
 918                         for (u32 i = 0; i < grass_count; i++) {
 919                                 s16 x = grassrandom.range(p2d_min.X, p2d_max.X);
 920                                 s16 z = grassrandom.range(p2d_min.Y, p2d_max.Y);
 921                                 int mapindex = central_area_size.X * (z - node_min.Z)
 922                                                                 + (x - node_min.X);
 923                                 s16 y = heightmap[mapindex];
 924                                 if (y < water_level)
 925                                         continue;
 926
 927                                 u32 vi = vm->m_area.index(x, y, z);
 928                                 // place on dirt_with_grass, since we know it is exposed to sunlight
 929                                 if (vm->m_data[vi].getContent() == c_dirt_with_grass) {
 930                                         vm->m_area.add_y(em, vi, 1);
 931                                         vm->m_data[vi] = n_junglegrass;
 932                                 }
 933                         }
 934                 }
 935
 936                 // Put trees in random places on part of division
 937                 for (u32 i = 0; i < tree_count; i++) {
 938                         s16 x = myrand_range(p2d_min.X, p2d_max.X);
 939                         s16 z = myrand_range(p2d_min.Y, p2d_max.Y);
 940                         int mapindex = central_area_size.X * (z - node_min.Z)
 941                                                         + (x - node_min.X);
 942                         s16 y = heightmap[mapindex];
 943                         // Don't make a tree under water level
 944                         // Don't make a tree so high that it doesn't fit
 945                         if (y < water_level || y > node_max.Y - 6)
 946                                 continue;
 947
 948                         v3s16 p(x, y, z);
 949                         // Trees grow only on mud and grass and snowblock
 950                         {
 951                                 u32 i = vm->m_area.index(p);
 952                                 content_t c = vm->m_data[i].getContent();
 953                                 if (c != c_dirt &&
 954                                                 c != c_dirt_with_grass &&
 955                                                 c != c_dirt_with_snow &&
 956                                                 c != c_snowblock)
 957                                         continue;
 958                         }
 959                         p.Y++;
 960
 961                         // Make a tree
 962                         if (bt == BT_JUNGLE) {
 963                                 treegen::make_jungletree(*vm, p, ndef, myrand());
 964                         } else if (bt == BT_TAIGA) {
 965                                 treegen::make_pine_tree(*vm, p - v3s16(0, 1, 0), ndef, myrand());
 966                         } else if (bt == BT_NORMAL) {
 967                                 bool is_apple_tree = (myrand_range(0, 3) == 0) &&
 968                                                         getHaveAppleTree(v2s16(x, z));
 969                                 treegen::make_tree(*vm, p, is_apple_tree, ndef, myrand());
 970                         }
 971                 }
 972         }
 973         //printf("placeTreesAndJungleGrass: %dms\n", t.stop());
 974 }
 975
 976
 977 void MapgenV6::growGrass() // Add surface nodes
 978 {
 979         MapNode n_dirt_with_grass(c_dirt_with_grass);
 980         MapNode n_dirt_with_snow(c_dirt_with_snow);
 981         MapNode n_snowblock(c_snowblock);
 982         MapNode n_snow(c_snow);
 983         v3s16 em = vm->m_area.getExtent();
 984
 985         u32 index = 0;
 986         for (s16 z = full_node_min.Z; z <= full_node_max.Z; z++)
 987         for (s16 x = full_node_min.X; x <= full_node_max.X; x++, index++) {
 988                 // Find the lowest surface to which enough light ends up to make
 989                 // grass grow.  Basically just wait until not air and not leaves.
 990                 s16 surface_y = 0;
 991                 {
 992                         u32 i = vm->m_area.index(x, node_max.Y, z);
 993                         s16 y;
 994                         // Go to ground level
 995                         for (y = node_max.Y; y >= full_node_min.Y; y--) {
 996                                 MapNode &n = vm->m_data[i];
 997                                 if (ndef->get(n).param_type != CPT_LIGHT ||
 998                                                 ndef->get(n).liquid_type != LIQUID_NONE ||
 999                                                 n.getContent() == c_ice)
1000                                         break;
1001                                 vm->m_area.add_y(em, i, -1);
1002                         }
1003                         surface_y = (y >= full_node_min.Y) ? y : full_node_min.Y;
1004                 }
1005
1006                 BiomeV6Type bt = getBiome(index, v2s16(x, z));
1007                 u32 i = vm->m_area.index(x, surface_y, z);
1008                 content_t c = vm->m_data[i].getContent();
1009                 if (surface_y >= water_level - 20) {
1010                         if (bt == BT_TAIGA && c == c_dirt) {
1011                                 vm->m_data[i] = n_snowblock;
1012                                 vm->m_area.add_y(em, i, -1);
1013                                 vm->m_data[i] = n_dirt_with_snow;
1014                         } else if (bt == BT_TUNDRA) {
1015                                 if (c == c_dirt) {
1016                                         vm->m_data[i] = n_dirt_with_snow;
1017                                 } else if (c == c_stone && surface_y < node_max.Y) {
1018                                         vm->m_area.add_y(em, i, 1);
1019                                         vm->m_data[i] = n_snow;
1020                                 }
1021                         } else if (c == c_dirt) {
1022                                 vm->m_data[i] = n_dirt_with_grass;
1023                         }
1024                 }
1025         }
1026 }
1027
1028
1029 void MapgenV6::generateCaves(int max_stone_y)
1030 {
1031         float cave_amount = NoisePerlin2D(np_cave, node_min.X, node_min.Y, seed);
1032         int volume_nodes = (node_max.X - node_min.X + 1) *
1033                                            (node_max.Y - node_min.Y + 1) * MAP_BLOCKSIZE;
1034         cave_amount = MYMAX(0.0, cave_amount);
1035         u32 caves_count = cave_amount * volume_nodes / 50000;
1036         u32 bruises_count = 1;
1037         PseudoRandom ps(blockseed + 21343);
1038         PseudoRandom ps2(blockseed + 1032);
1039
1040         if (ps.range(1, 6) == 1)
1041                 bruises_count = ps.range(0, ps.range(0, 2));
1042
1043         if (getBiome(v2s16(node_min.X, node_min.Z)) == BT_DESERT) {
1044                 caves_count   /= 3;
1045                 bruises_count /= 3;
1046         }
1047
1048         for (u32 i = 0; i < caves_count + bruises_count; i++) {
1049                 bool large_cave = (i >= caves_count);
1050                 CaveV6 cave(this, &ps, &ps2, large_cave);
1051
1052                 cave.makeCave(node_min, node_max, max_stone_y);
1053         }
1054 }