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
  21 #include "mapgen.h"
  22 #include "voxel.h"
  23 #include "noise.h"
  24 #include "mapblock.h"
  25 #include "mapnode.h"
  26 #include "map.h"
  27 //#include "serverobject.h"
  28 #include "content_sao.h"
  29 #include "nodedef.h"
  30 #include "voxelalgorithms.h"
  31 //#include "profiler.h" // For TimeTaker
  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
  42 FlagDesc flagdesc_mapgen_v6[] = {
  43         {"jungles",    MGV6_JUNGLES},
  44         {"biomeblend", MGV6_BIOMEBLEND},
  45         {"mudflow",    MGV6_MUDFLOW},
  46         {"snowbiomes", MGV6_SNOWBIOMES},
  47         {"flat",       MGV6_FLAT},
  48         {"trees",      MGV6_TREES},
  49         {NULL,         0}
  50 };
  51
  52
  53 /////////////////////////////////////////////////////////////////////////////
  54
  55
  56 MapgenV6::MapgenV6(int mapgenid, MapgenParams *params, EmergeManager *emerge)
  57         : Mapgen(mapgenid, params, emerge)
  58 {
  59         this->m_emerge = emerge;
  60         this->ystride = csize.X; //////fix this
  61
  62         this->heightmap = new s16[csize.X * csize.Z];
  63
  64         MapgenV6Params *sp = (MapgenV6Params *)params->sparams;
  65         this->spflags     = sp->spflags;
  66         this->freq_desert = sp->freq_desert;
  67         this->freq_beach  = sp->freq_beach;
  68
  69         np_cave        = &sp->np_cave;
  70         np_humidity    = &sp->np_humidity;
  71         np_trees       = &sp->np_trees;
  72         np_apple_trees = &sp->np_apple_trees;
  73
  74         //// Create noise objects
  75         noise_terrain_base   = new Noise(&sp->np_terrain_base,   seed, csize.X, csize.Y);
  76         noise_terrain_higher = new Noise(&sp->np_terrain_higher, seed, csize.X, csize.Y);
  77         noise_steepness      = new Noise(&sp->np_steepness,      seed, csize.X, csize.Y);
  78         noise_height_select  = new Noise(&sp->np_height_select,  seed, csize.X, csize.Y);
  79         noise_mud            = new Noise(&sp->np_mud,            seed, csize.X, csize.Y);
  80         noise_beach          = new Noise(&sp->np_beach,          seed, csize.X, csize.Y);
  81         noise_biome          = new Noise(&sp->np_biome,          seed,
  82                         csize.X + 2 * MAP_BLOCKSIZE, csize.Y + 2 * MAP_BLOCKSIZE);
  83         noise_humidity       = new Noise(&sp->np_humidity,       seed,
  84                         csize.X + 2 * MAP_BLOCKSIZE, csize.Y + 2 * MAP_BLOCKSIZE);
  85
  86         //// Resolve nodes to be used
  87         INodeDefManager *ndef = emerge->ndef;
  88
  89         c_stone           = ndef->getId("mapgen_stone");
  90         c_dirt            = ndef->getId("mapgen_dirt");
  91         c_dirt_with_grass = ndef->getId("mapgen_dirt_with_grass");
  92         c_sand            = ndef->getId("mapgen_sand");
  93         c_water_source    = ndef->getId("mapgen_water_source");
  94         c_lava_source     = ndef->getId("mapgen_lava_source");
  95         c_gravel          = ndef->getId("mapgen_gravel");
  96         c_desert_stone    = ndef->getId("mapgen_desert_stone");
  97         c_desert_sand     = ndef->getId("mapgen_desert_sand");
  98         c_dirt_with_snow  = ndef->getId("mapgen_dirt_with_snow");
  99         c_snow            = ndef->getId("mapgen_snow");
 100         c_snowblock       = ndef->getId("mapgen_snowblock");
 101         c_ice             = ndef->getId("mapgen_ice");
 102
 103         c_cobble          = ndef->getId("mapgen_cobble");
 104         c_stair_cobble    = ndef->getId("mapgen_stair_cobble");
 105         c_mossycobble     = ndef->getId("mapgen_mossycobble");
 106
 107         if (c_desert_sand == CONTENT_IGNORE)
 108                 c_desert_sand = c_sand;
 109         if (c_desert_stone == CONTENT_IGNORE)
 110                 c_desert_stone = c_stone;
 111         if (c_mossycobble == CONTENT_IGNORE)
 112                 c_mossycobble = c_cobble;
 113         if (c_stair_cobble == CONTENT_IGNORE)
 114                 c_stair_cobble = c_cobble;
 115         if (c_dirt_with_snow == CONTENT_IGNORE)
 116                 c_dirt_with_snow = c_dirt_with_grass;
 117         if (c_snow == CONTENT_IGNORE)
 118                 c_snow = CONTENT_AIR;
 119         if (c_snowblock == CONTENT_IGNORE)
 120                 c_snowblock = c_dirt_with_grass;
 121         if (c_ice == CONTENT_IGNORE)
 122                 c_ice = c_water_source;
 123 }
 124
 125
 126 MapgenV6::~MapgenV6()
 127 {
 128         delete noise_terrain_base;
 129         delete noise_terrain_higher;
 130         delete noise_steepness;
 131         delete noise_height_select;
 132         delete noise_mud;
 133         delete noise_beach;
 134         delete noise_biome;
 135         delete noise_humidity;
 136
 137         delete[] heightmap;
 138 }
 139
 140
 141 MapgenV6Params::MapgenV6Params()
 142 {
 143         spflags     = MGV6_BIOMEBLEND | MGV6_MUDFLOW;
 144         freq_desert = 0.45;
 145         freq_beach  = 0.15;
 146
 147         np_terrain_base   = NoiseParams(-4,   20.0, v3f(250.0, 250.0, 250.0), 82341,  5, 0.6,  2.0);
 148         np_terrain_higher = NoiseParams(20,   16.0, v3f(500.0, 500.0, 500.0), 85039,  5, 0.6,  2.0);
 149         np_steepness      = NoiseParams(0.85, 0.5,  v3f(125.0, 125.0, 125.0), -932,   5, 0.7,  2.0);
 150         np_height_select  = NoiseParams(0,    1.0,  v3f(250.0, 250.0, 250.0), 4213,   5, 0.69, 2.0);
 151         np_mud            = NoiseParams(4,    2.0,  v3f(200.0, 200.0, 200.0), 91013,  3, 0.55, 2.0);
 152         np_beach          = NoiseParams(0,    1.0,  v3f(250.0, 250.0, 250.0), 59420,  3, 0.50, 2.0);
 153         np_biome          = NoiseParams(0,    1.0,  v3f(500.0, 500.0, 500.0), 9130,   3, 0.50, 2.0);
 154         np_cave           = NoiseParams(6,    6.0,  v3f(250.0, 250.0, 250.0), 34329,  3, 0.50, 2.0);
 155         np_humidity       = NoiseParams(0.5,  0.5,  v3f(500.0, 500.0, 500.0), 72384,  3, 0.50, 2.0);
 156         np_trees          = NoiseParams(0,    1.0,  v3f(125.0, 125.0, 125.0), 2,      4, 0.66, 2.0);
 157         np_apple_trees    = NoiseParams(0,    1.0,  v3f(100.0, 100.0, 100.0), 342902, 3, 0.45, 2.0);
 158 }
 159
 160
 161 void MapgenV6Params::readParams(const Settings *settings)
 162 {
 163         settings->getFlagStrNoEx("mgv6_spflags", spflags, flagdesc_mapgen_v6);
 164         settings->getFloatNoEx("mgv6_freq_desert", freq_desert);
 165         settings->getFloatNoEx("mgv6_freq_beach",  freq_beach);
 166
 167         settings->getNoiseParams("mgv6_np_terrain_base",   np_terrain_base);
 168         settings->getNoiseParams("mgv6_np_terrain_higher", np_terrain_higher);
 169         settings->getNoiseParams("mgv6_np_steepness",      np_steepness);
 170         settings->getNoiseParams("mgv6_np_height_select",  np_height_select);
 171         settings->getNoiseParams("mgv6_np_mud",            np_mud);
 172         settings->getNoiseParams("mgv6_np_beach",          np_beach);
 173         settings->getNoiseParams("mgv6_np_biome",          np_biome);
 174         settings->getNoiseParams("mgv6_np_cave",           np_cave);
 175         settings->getNoiseParams("mgv6_np_humidity",       np_humidity);
 176         settings->getNoiseParams("mgv6_np_trees",          np_trees);
 177         settings->getNoiseParams("mgv6_np_apple_trees",    np_apple_trees);
 178 }
 179
 180
 181 void MapgenV6Params::writeParams(Settings *settings) const
 182 {
 183         settings->setFlagStr("mgv6_spflags", spflags, flagdesc_mapgen_v6, U32_MAX);
 184         settings->setFloat("mgv6_freq_desert", freq_desert);
 185         settings->setFloat("mgv6_freq_beach",  freq_beach);
 186
 187         settings->setNoiseParams("mgv6_np_terrain_base",   np_terrain_base);
 188         settings->setNoiseParams("mgv6_np_terrain_higher", np_terrain_higher);
 189         settings->setNoiseParams("mgv6_np_steepness",      np_steepness);
 190         settings->setNoiseParams("mgv6_np_height_select",  np_height_select);
 191         settings->setNoiseParams("mgv6_np_mud",            np_mud);
 192         settings->setNoiseParams("mgv6_np_beach",          np_beach);
 193         settings->setNoiseParams("mgv6_np_biome",          np_biome);
 194         settings->setNoiseParams("mgv6_np_cave",           np_cave);
 195         settings->setNoiseParams("mgv6_np_humidity",       np_humidity);
 196         settings->setNoiseParams("mgv6_np_trees",          np_trees);
 197         settings->setNoiseParams("mgv6_np_apple_trees",    np_apple_trees);
 198 }
 199
 200
 201 //////////////////////// Some helper functions for the map generator
 202
 203 // Returns Y one under area minimum if not found
 204 s16 MapgenV6::find_stone_level(v2s16 p2d)
 205 {
 206         v3s16 em = vm->m_area.getExtent();
 207         s16 y_nodes_max = vm->m_area.MaxEdge.Y;
 208         s16 y_nodes_min = vm->m_area.MinEdge.Y;
 209         u32 i = vm->m_area.index(p2d.X, y_nodes_max, p2d.Y);
 210         s16 y;
 211
 212         for (y = y_nodes_max; y >= y_nodes_min; y--) {
 213                 content_t c = vm->m_data[i].getContent();
 214                 if (c != CONTENT_IGNORE && (c == c_stone || c == c_desert_stone))
 215                         break;
 216
 217                 vm->m_area.add_y(em, i, -1);
 218         }
 219         return (y >= y_nodes_min) ? y : y_nodes_min - 1;
 220 }
 221
 222
 223 // Required by mapgen.h
 224 bool MapgenV6::block_is_underground(u64 seed, v3s16 blockpos)
 225 {
 226         /*s16 minimum_groundlevel = (s16)get_sector_minimum_ground_level(
 227                         seed, v2s16(blockpos.X, blockpos.Z));*/
 228         // Nah, this is just a heuristic, just return something
 229         s16 minimum_groundlevel = water_level;
 230
 231         if(blockpos.Y * MAP_BLOCKSIZE + MAP_BLOCKSIZE <= minimum_groundlevel)
 232                 return true;
 233         else
 234                 return false;
 235 }
 236
 237
 238 //////////////////////// Base terrain height functions
 239
 240 float MapgenV6::baseTerrainLevel(float terrain_base, float terrain_higher,
 241         float steepness, float height_select)
 242 {
 243         float base   = 1 + terrain_base;
 244         float higher = 1 + terrain_higher;
 245
 246         // Limit higher ground level to at least base
 247         if(higher < base)
 248                 higher = base;
 249
 250         // Steepness factor of cliffs
 251         float b = steepness;
 252         b = rangelim(b, 0.0, 1000.0);
 253         b = 5 * b * b * b * b * b * b * b;
 254         b = rangelim(b, 0.5, 1000.0);
 255
 256         // Values 1.5...100 give quite horrible looking slopes
 257         if (b > 1.5 && b < 100.0)
 258                 b = (b < 10.0) ? 1.5 : 100.0;
 259
 260         float a_off = -0.20; // Offset to more low
 261         float a = 0.5 + b * (a_off + height_select);
 262         a = rangelim(a, 0.0, 1.0); // Limit
 263
 264         return base * (1.0 - a) + higher * a;
 265 }
 266
 267
 268 float MapgenV6::baseTerrainLevelFromNoise(v2s16 p)
 269 {
 270         if ((spflags & MGV6_FLAT) || (flags & MG_FLAT))
 271                 return water_level;
 272
 273         float terrain_base   = NoisePerlin2D_PO(&noise_terrain_base->np,
 274                                                         p.X, 0.5, p.Y, 0.5, seed);
 275         float terrain_higher = NoisePerlin2D_PO(&noise_terrain_higher->np,
 276                                                         p.X, 0.5, p.Y, 0.5, seed);
 277         float steepness      = NoisePerlin2D_PO(&noise_steepness->np,
 278                                                         p.X, 0.5, p.Y, 0.5, seed);
 279         float height_select  = NoisePerlin2D_PO(&noise_height_select->np,
 280                                                         p.X, 0.5, p.Y, 0.5, seed);
 281
 282         return baseTerrainLevel(terrain_base, terrain_higher,
 283                                                         steepness, height_select);
 284 }
 285
 286
 287 float MapgenV6::baseTerrainLevelFromMap(v2s16 p)
 288 {
 289         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 290         return baseTerrainLevelFromMap(index);
 291 }
 292
 293
 294 float MapgenV6::baseTerrainLevelFromMap(int index)
 295 {
 296         if ((spflags & MGV6_FLAT) || (flags & MG_FLAT))
 297                 return water_level;
 298
 299         float terrain_base   = noise_terrain_base->result[index];
 300         float terrain_higher = noise_terrain_higher->result[index];
 301         float steepness      = noise_steepness->result[index];
 302         float height_select  = noise_height_select->result[index];
 303
 304         return baseTerrainLevel(terrain_base, terrain_higher,
 305                                                         steepness, height_select);
 306 }
 307
 308
 309 s16 MapgenV6::find_ground_level_from_noise(u64 seed, v2s16 p2d, s16 precision)
 310 {
 311         return baseTerrainLevelFromNoise(p2d) + MGV6_AVERAGE_MUD_AMOUNT;
 312 }
 313
 314
 315 int MapgenV6::getGroundLevelAtPoint(v2s16 p)
 316 {
 317         return baseTerrainLevelFromNoise(p) + MGV6_AVERAGE_MUD_AMOUNT;
 318 }
 319
 320
 321 //////////////////////// Noise functions
 322
 323 float MapgenV6::getMudAmount(v2s16 p)
 324 {
 325         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 326         return getMudAmount(index);
 327 }
 328
 329
 330 bool MapgenV6::getHaveBeach(v2s16 p)
 331 {
 332         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 333         return getHaveBeach(index);
 334 }
 335
 336
 337 BiomeV6Type MapgenV6::getBiome(v2s16 p)
 338 {
 339         int index = (p.Y - full_node_min.Z) * (ystride + 2 * MAP_BLOCKSIZE)
 340                         + (p.X - full_node_min.X);
 341         return getBiome(index, p);
 342 }
 343
 344
 345 float MapgenV6::getHumidity(v2s16 p)
 346 {
 347         /*double noise = noise2d_perlin(
 348                 0.5+(float)p.X/500, 0.5+(float)p.Y/500,
 349                 seed+72384, 4, 0.66);
 350         noise = (noise + 1.0)/2.0;*/
 351
 352         int index = (p.Y - full_node_min.Z) * (ystride + 2 * MAP_BLOCKSIZE)
 353                         + (p.X - full_node_min.X);
 354         float noise = noise_humidity->result[index];
 355
 356         if (noise < 0.0)
 357                 noise = 0.0;
 358         if (noise > 1.0)
 359                 noise = 1.0;
 360         return noise;
 361 }
 362
 363
 364 float MapgenV6::getTreeAmount(v2s16 p)
 365 {
 366         /*double noise = noise2d_perlin(
 367                         0.5+(float)p.X/125, 0.5+(float)p.Y/125,
 368                         seed+2, 4, 0.66);*/
 369
 370         float noise = NoisePerlin2D(np_trees, p.X, p.Y, seed);
 371         float zeroval = -0.39;
 372         if (noise < zeroval)
 373                 return 0;
 374         else
 375                 return 0.04 * (noise - zeroval) / (1.0 - zeroval);
 376 }
 377
 378
 379 bool MapgenV6::getHaveAppleTree(v2s16 p)
 380 {
 381         /*is_apple_tree = noise2d_perlin(
 382                 0.5+(float)p.X/100, 0.5+(float)p.Z/100,
 383                 data->seed+342902, 3, 0.45) > 0.2;*/
 384
 385         float noise = NoisePerlin2D(np_apple_trees, p.X, p.Y, seed);
 386
 387         return noise > 0.2;
 388 }
 389
 390
 391 float MapgenV6::getMudAmount(int index)
 392 {
 393         if ((spflags & MGV6_FLAT) || (flags & MG_FLAT))
 394                 return MGV6_AVERAGE_MUD_AMOUNT;
 395
 396         /*return ((float)AVERAGE_MUD_AMOUNT + 2.0 * noise2d_perlin(
 397                         0.5+(float)p.X/200, 0.5+(float)p.Y/200,
 398                         seed+91013, 3, 0.55));*/
 399
 400         return noise_mud->result[index];
 401 }
 402
 403
 404 bool MapgenV6::getHaveBeach(int index)
 405 {
 406         // Determine whether to have sand here
 407         /*double sandnoise = noise2d_perlin(
 408                         0.2+(float)p2d.X/250, 0.7+(float)p2d.Y/250,
 409                         seed+59420, 3, 0.50);*/
 410
 411         float sandnoise = noise_beach->result[index];
 412         return (sandnoise > freq_beach);
 413 }
 414
 415
 416 BiomeV6Type MapgenV6::getBiome(int index, v2s16 p)
 417 {
 418         // Just do something very simple as for now
 419         /*double d = noise2d_perlin(
 420                         0.6+(float)p2d.X/250, 0.2+(float)p2d.Y/250,
 421                         seed+9130, 3, 0.50);*/
 422
 423         float d = noise_biome->result[index];
 424         float h = noise_humidity->result[index];
 425
 426         if (spflags & MGV6_SNOWBIOMES) {
 427                 float blend = (spflags & MGV6_BIOMEBLEND) ? noise2d(p.X, p.Y, seed) / 40 : 0;
 428
 429                 if (d > MGV6_FREQ_HOT + blend) {
 430                         if (h > MGV6_FREQ_JUNGLE + blend)
 431                                 return BT_JUNGLE;
 432                         else
 433                                 return BT_DESERT;
 434                 } else if (d < MGV6_FREQ_SNOW + blend) {
 435                         if (h > MGV6_FREQ_TAIGA + blend)
 436                                 return BT_TAIGA;
 437                         else
 438                                 return BT_TUNDRA;
 439                 } else {
 440                         return BT_NORMAL;
 441                 }
 442         } else {
 443                 if (d > freq_desert)
 444                         return BT_DESERT;
 445
 446                 if ((spflags & MGV6_BIOMEBLEND) && (d > freq_desert - 0.10) &&
 447                                 ((noise2d(p.X, p.Y, seed) + 1.0) > (freq_desert - d) * 20.0))
 448                         return BT_DESERT;
 449
 450                 if ((spflags & MGV6_JUNGLES) && h > 0.75)
 451                         return BT_JUNGLE;
 452                 else
 453                         return BT_NORMAL;
 454         }
 455 }
 456
 457
 458 u32 MapgenV6::get_blockseed(u64 seed, v3s16 p)
 459 {
 460         s32 x = p.X, y = p.Y, z = p.Z;
 461         return (u32)(seed % 0x100000000ULL) + z * 38134234 + y * 42123 + x * 23;
 462 }
 463
 464
 465 //////////////////////// Map generator
 466
 467 void MapgenV6::makeChunk(BlockMakeData *data)
 468 {
 469         // Pre-conditions
 470         assert(data->vmanip);
 471         assert(data->nodedef);
 472         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 473                 data->blockpos_requested.Y >= data->blockpos_min.Y &&
 474                 data->blockpos_requested.Z >= data->blockpos_min.Z);
 475         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 476                 data->blockpos_requested.Y <= data->blockpos_max.Y &&
 477                 data->blockpos_requested.Z <= data->blockpos_max.Z);
 478
 479         this->generating = true;
 480         this->vm   = data->vmanip;
 481         this->ndef = data->nodedef;
 482
 483         // Hack: use minimum block coords for old code that assumes a single block
 484         v3s16 blockpos_min = data->blockpos_min;
 485         v3s16 blockpos_max = data->blockpos_max;
 486
 487         // Area of central chunk
 488         node_min = blockpos_min * MAP_BLOCKSIZE;
 489         node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 490
 491         // Full allocated area
 492         full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
 493         full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 494
 495         central_area_size = node_max - node_min + v3s16(1, 1, 1);
 496         assert(central_area_size.X == central_area_size.Z);
 497
 498         int volume_blocks = (blockpos_max.X - blockpos_min.X + 1)
 499                                           * (blockpos_max.Y - blockpos_min.Y + 1)
 500                                           * (blockpos_max.Z - blockpos_max.Z + 1);
 501
 502         volume_nodes = volume_blocks *
 503                 MAP_BLOCKSIZE * MAP_BLOCKSIZE * MAP_BLOCKSIZE;
 504
 505         // Create a block-specific seed
 506         blockseed = get_blockseed(data->seed, full_node_min);
 507
 508         // Make some noise
 509         calculateNoise();
 510
 511         // Maximum height of the stone surface and obstacles.
 512         // This is used to guide the cave generation
 513         s16 stone_surface_max_y;
 514
 515         // Generate general ground level to full area
 516         stone_surface_max_y = generateGround();
 517
 518         // Create initial heightmap to limit caves
 519         updateHeightmap(node_min, node_max);
 520
 521         const s16 max_spread_amount = MAP_BLOCKSIZE;
 522         // Limit dirt flow area by 1 because mud is flown into neighbors.
 523         s16 mudflow_minpos = -max_spread_amount + 1;
 524         s16 mudflow_maxpos = central_area_size.X + max_spread_amount - 2;
 525
 526         // Loop this part, it will make stuff look older and newer nicely
 527         const u32 age_loops = 2;
 528         for (u32 i_age = 0; i_age < age_loops; i_age++) { // Aging loop
 529                 // Make caves (this code is relatively horrible)
 530                 if (flags & MG_CAVES)
 531                         generateCaves(stone_surface_max_y);
 532
 533                 // Add mud to the central chunk
 534                 addMud();
 535
 536                 // Flow mud away from steep edges
 537                 if (spflags & MGV6_MUDFLOW)
 538                         flowMud(mudflow_minpos, mudflow_maxpos);
 539
 540         }
 541
 542         // Update heightmap after mudflow
 543         updateHeightmap(node_min, node_max);
 544
 545         // Add dungeons
 546         if ((flags & MG_DUNGEONS) && (stone_surface_max_y >= node_min.Y)) {
 547                 DungeonParams dp;
 548
 549                 dp.np_rarity  = nparams_dungeon_rarity;
 550                 dp.np_density = nparams_dungeon_density;
 551                 dp.np_wetness = nparams_dungeon_wetness;
 552                 dp.c_water    = c_water_source;
 553                 if (getBiome(0, v2s16(node_min.X, node_min.Z)) == BT_DESERT) {
 554                         dp.c_cobble = c_desert_stone;
 555                         dp.c_moss   = c_desert_stone;
 556                         dp.c_stair  = c_desert_stone;
 557
 558                         dp.diagonal_dirs = true;
 559                         dp.mossratio     = 0.0;
 560                         dp.holesize      = v3s16(2, 3, 2);
 561                         dp.roomsize      = v3s16(2, 5, 2);
 562                         dp.notifytype    = GENNOTIFY_TEMPLE;
 563                 } else {
 564                         dp.c_cobble = c_cobble;
 565                         dp.c_moss   = c_mossycobble;
 566                         dp.c_stair  = c_stair_cobble;
 567
 568                         dp.diagonal_dirs = false;
 569                         dp.mossratio     = 3.0;
 570                         dp.holesize      = v3s16(1, 2, 1);
 571                         dp.roomsize      = v3s16(0, 0, 0);
 572                         dp.notifytype    = GENNOTIFY_DUNGEON;
 573                 }
 574
 575                 DungeonGen dgen(this, &dp);
 576                 dgen.generate(blockseed, full_node_min, full_node_max);
 577         }
 578
 579         // Add top and bottom side of water to transforming_liquid queue
 580         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 581
 582         // Add surface nodes
 583         growGrass();
 584
 585         // Generate some trees, and add grass, if a jungle
 586         if ((spflags & MGV6_TREES) || (flags & MG_TREES))
 587                 placeTreesAndJungleGrass();
 588
 589         // Generate the registered decorations
 590         if (flags & MG_DECORATIONS)
 591                 m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
 592
 593         // Generate the registered ores
 594         m_emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
 595
 596         // Calculate lighting
 597         if (flags & MG_LIGHT)
 598                 calcLighting(node_min - v3s16(1, 1, 1) * MAP_BLOCKSIZE,
 599                         node_max + v3s16(1, 0, 1) * MAP_BLOCKSIZE,
 600                         full_node_min, full_node_max);
 601
 602         this->generating = false;
 603 }
 604
 605
 606 void MapgenV6::calculateNoise()
 607 {
 608         int x = node_min.X;
 609         int z = node_min.Z;
 610         int fx = full_node_min.X;
 611         int fz = full_node_min.Z;
 612
 613         if (!((spflags & MGV6_FLAT) || (flags & MG_FLAT))) {
 614                 noise_terrain_base->perlinMap2D_PO(x, 0.5, z, 0.5);
 615                 noise_terrain_higher->perlinMap2D_PO(x, 0.5, z, 0.5);
 616                 noise_steepness->perlinMap2D_PO(x, 0.5, z, 0.5);
 617                 noise_height_select->perlinMap2D_PO(x, 0.5, z, 0.5);
 618                 noise_mud->perlinMap2D_PO(x, 0.5, z, 0.5);
 619         }
 620
 621         noise_beach->perlinMap2D_PO(x, 0.2, z, 0.7);
 622
 623         noise_biome->perlinMap2D_PO(fx, 0.6, fz, 0.2);
 624         noise_humidity->perlinMap2D_PO(fx, 0.0, fz, 0.0);
 625         // Humidity map does not need range limiting 0 to 1,
 626         // only humidity at point does
 627 }
 628
 629
 630 int MapgenV6::generateGround()
 631 {
 632         //TimeTaker timer1("Generating ground level");
 633         MapNode n_air(CONTENT_AIR), n_water_source(c_water_source);
 634         MapNode n_stone(c_stone), n_desert_stone(c_desert_stone);
 635         MapNode n_ice(c_ice);
 636         int stone_surface_max_y = -MAX_MAP_GENERATION_LIMIT;
 637
 638         u32 index = 0;
 639         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 640         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 641                 // Surface height
 642                 s16 surface_y = (s16)baseTerrainLevelFromMap(index);
 643
 644                 // Log it
 645                 if (surface_y > stone_surface_max_y)
 646                         stone_surface_max_y = surface_y;
 647
 648                 BiomeV6Type bt = getBiome(v2s16(x, z));
 649
 650                 // Fill ground with stone
 651                 v3s16 em = vm->m_area.getExtent();
 652                 u32 i = vm->m_area.index(x, node_min.Y, z);
 653                 for (s16 y = node_min.Y; y <= node_max.Y; y++) {
 654                         if (vm->m_data[i].getContent() == CONTENT_IGNORE) {
 655                                 if (y <= surface_y) {
 656                                         vm->m_data[i] = (y >= MGV6_DESERT_STONE_BASE
 657                                                         && bt == BT_DESERT) ?
 658                                                 n_desert_stone : n_stone;
 659                                 } else if (y <= water_level) {
 660                                         vm->m_data[i] = (y >= MGV6_ICE_BASE
 661                                                         && bt == BT_TUNDRA) ?
 662                                                 n_ice : n_water_source;
 663                                 } else {
 664                                         vm->m_data[i] = n_air;
 665                                 }
 666                         }
 667                         vm->m_area.add_y(em, i, 1);
 668                 }
 669         }
 670
 671         return stone_surface_max_y;
 672 }
 673
 674
 675 void MapgenV6::addMud()
 676 {
 677         // 15ms @cs=8
 678         //TimeTaker timer1("add mud");
 679         MapNode n_dirt(c_dirt), n_gravel(c_gravel);
 680         MapNode n_sand(c_sand), n_desert_sand(c_desert_sand);
 681         MapNode addnode;
 682
 683         u32 index = 0;
 684         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 685         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 686                 // Randomize mud amount
 687                 s16 mud_add_amount = getMudAmount(index) / 2.0 + 0.5;
 688
 689                 // Find ground level
 690                 s16 surface_y = find_stone_level(v2s16(x, z)); /////////////////optimize this!
 691
 692                 // Handle area not found
 693                 if (surface_y == vm->m_area.MinEdge.Y - 1)
 694                         continue;
 695
 696                 BiomeV6Type bt = getBiome(v2s16(x, z));
 697                 addnode = (bt == BT_DESERT) ? n_desert_sand : n_dirt;
 698
 699                 if (bt == BT_DESERT && surface_y + mud_add_amount <= water_level + 1) {
 700                         addnode = n_sand;
 701                 } else if (mud_add_amount <= 0) {
 702                         mud_add_amount = 1 - mud_add_amount;
 703                         addnode = n_gravel;
 704                 } else if (bt != BT_DESERT && getHaveBeach(index) &&
 705                                 surface_y + mud_add_amount <= water_level + 2) {
 706                         addnode = n_sand;
 707                 }
 708
 709                 if ((bt == BT_DESERT || bt == BT_TUNDRA) && surface_y > 20)
 710                         mud_add_amount = MYMAX(0, mud_add_amount - (surface_y - 20) / 5);
 711
 712                 /* If topmost node is grass, change it to mud.  It might be if it was
 713                 // flown to there from a neighboring chunk and then converted.
 714                 u32 i = vm->m_area.index(x, surface_y, z);
 715                 if (vm->m_data[i].getContent() == c_dirt_with_grass)
 716                         vm->m_data[i] = n_dirt;*/
 717
 718                 // Add mud on ground
 719                 s16 mudcount = 0;
 720                 v3s16 em = vm->m_area.getExtent();
 721                 s16 y_start = surface_y + 1;
 722                 u32 i = vm->m_area.index(x, y_start, z);
 723                 for (s16 y = y_start; y <= node_max.Y; y++) {
 724                         if (mudcount >= mud_add_amount)
 725                                 break;
 726
 727                         vm->m_data[i] = addnode;
 728                         mudcount++;
 729
 730                         vm->m_area.add_y(em, i, 1);
 731                 }
 732         }
 733 }
 734
 735
 736 void MapgenV6::flowMud(s16 &mudflow_minpos, s16 &mudflow_maxpos)
 737 {
 738         // 340ms @cs=8
 739         //TimeTaker timer1("flow mud");
 740
 741         // Iterate a few times
 742         for (s16 k = 0; k < 3; k++) {
 743                 for (s16 z = mudflow_minpos; z <= mudflow_maxpos; z++)
 744                 for (s16 x = mudflow_minpos; x <= mudflow_maxpos; x++) {
 745                         // Invert coordinates every 2nd iteration
 746                         if (k % 2 == 0) {
 747                                 x = mudflow_maxpos - (x - mudflow_minpos);
 748                                 z = mudflow_maxpos - (z - mudflow_minpos);
 749                         }
 750
 751                         // Node position in 2d
 752                         v2s16 p2d = v2s16(node_min.X, node_min.Z) + v2s16(x, z);
 753
 754                         v3s16 em = vm->m_area.getExtent();
 755                         u32 i = vm->m_area.index(p2d.X, node_max.Y, p2d.Y);
 756                         s16 y = node_max.Y;
 757
 758                         while (y >= node_min.Y) {
 759
 760                         for (;; y--) {
 761                                 MapNode *n = NULL;
 762                                 // Find mud
 763                                 for (; y >= node_min.Y; y--) {
 764                                         n = &vm->m_data[i];
 765                                         if (n->getContent() == c_dirt ||
 766                                                         n->getContent() == c_dirt_with_grass ||
 767                                                         n->getContent() == c_gravel)
 768                                                 break;
 769
 770                                         vm->m_area.add_y(em, i, -1);
 771                                 }
 772
 773                                 // Stop if out of area
 774                                 //if(vmanip.m_area.contains(i) == false)
 775                                 if (y < node_min.Y)
 776                                         break;
 777
 778                                 if (n->getContent() == c_dirt ||
 779                                                 n->getContent() == c_dirt_with_grass) {
 780                                         // Make it exactly mud
 781                                         n->setContent(c_dirt);
 782
 783                                         // Don't flow it if the stuff under it is not mud
 784                                         {
 785                                                 u32 i2 = i;
 786                                                 vm->m_area.add_y(em, i2, -1);
 787                                                 // Cancel if out of area
 788                                                 if (vm->m_area.contains(i2) == false)
 789                                                         continue;
 790                                                 MapNode *n2 = &vm->m_data[i2];
 791                                                 if (n2->getContent() != c_dirt &&
 792                                                                 n2->getContent() != c_dirt_with_grass)
 793                                                         continue;
 794                                         }
 795                                 }
 796
 797                                 v3s16 dirs4[4] = {
 798                                         v3s16(0, 0, 1), // back
 799                                         v3s16(1, 0, 0), // right
 800                                         v3s16(0, 0, -1), // front
 801                                         v3s16(-1, 0, 0), // left
 802                                 };
 803
 804                                 // Check that upper is air or doesn't exist.
 805                                 // Cancel dropping if upper keeps it in place
 806                                 u32 i3 = i;
 807                                 vm->m_area.add_y(em, i3, 1);
 808                                 if (vm->m_area.contains(i3) == true &&
 809                                                 ndef->get(vm->m_data[i3]).walkable)
 810                                         continue;
 811
 812                                 // Drop mud on side
 813                                 for (u32 di = 0; di < 4; di++) {
 814                                         v3s16 dirp = dirs4[di];
 815                                         u32 i2 = i;
 816                                         // Move to side
 817                                         vm->m_area.add_p(em, i2, dirp);
 818                                         // Fail if out of area
 819                                         if (vm->m_area.contains(i2) == false)
 820                                                 continue;
 821                                         // Check that side is air
 822                                         MapNode *n2 = &vm->m_data[i2];
 823                                         if (ndef->get(*n2).walkable)
 824                                                 continue;
 825                                         // Check that under side is air
 826                                         vm->m_area.add_y(em, i2, -1);
 827                                         if (vm->m_area.contains(i2) == false)
 828                                                 continue;
 829                                         n2 = &vm->m_data[i2];
 830                                         if (ndef->get(*n2).walkable)
 831                                                 continue;
 832                                         // Loop further down until not air
 833                                         bool dropped_to_unknown = false;
 834                                         do {
 835                                                 vm->m_area.add_y(em, i2, -1);
 836                                                 n2 = &vm->m_data[i2];
 837                                                 // if out of known area
 838                                                 if (vm->m_area.contains(i2) == false ||
 839                                                                 n2->getContent() == CONTENT_IGNORE) {
 840                                                         dropped_to_unknown = true;
 841                                                         break;
 842                                                 }
 843                                         } while (ndef->get(*n2).walkable == false);
 844                                         // Loop one up so that we're in air
 845                                         vm->m_area.add_y(em, i2, 1);
 846                                         n2 = &vm->m_data[i2];
 847
 848                                         bool old_is_water = (n->getContent() == c_water_source);
 849                                         // Move mud to new place
 850                                         if (!dropped_to_unknown) {
 851                                                 *n2 = *n;
 852                                                 // Set old place to be air (or water)
 853                                                 if (old_is_water)
 854                                                         *n = MapNode(c_water_source);
 855                                                 else
 856                                                         *n = MapNode(CONTENT_AIR);
 857                                         }
 858
 859                                         // Done
 860                                         break;
 861                                 }
 862                         }
 863                         }
 864                 }
 865         }
 866 }
 867
 868
 869 void MapgenV6::placeTreesAndJungleGrass()
 870 {
 871         //TimeTaker t("placeTrees");
 872         if (node_max.Y < water_level)
 873                 return;
 874
 875         PseudoRandom grassrandom(blockseed + 53);
 876         content_t c_junglegrass = ndef->getId("mapgen_junglegrass");
 877         // if we don't have junglegrass, don't place cignore... that's bad
 878         if (c_junglegrass == CONTENT_IGNORE)
 879                 c_junglegrass = CONTENT_AIR;
 880         MapNode n_junglegrass(c_junglegrass);
 881         v3s16 em = vm->m_area.getExtent();
 882
 883         // Divide area into parts
 884         s16 div = 8;
 885         s16 sidelen = central_area_size.X / div;
 886         double area = sidelen * sidelen;
 887
 888         // N.B.  We must add jungle grass first, since tree leaves will
 889         // obstruct the ground, giving us a false ground level
 890         for (s16 z0 = 0; z0 < div; z0++)
 891         for (s16 x0 = 0; x0 < div; x0++) {
 892                 // Center position of part of division
 893                 v2s16 p2d_center(
 894                         node_min.X + sidelen / 2 + sidelen * x0,
 895                         node_min.Z + sidelen / 2 + sidelen * z0
 896                 );
 897                 // Minimum edge of part of division
 898                 v2s16 p2d_min(
 899                         node_min.X + sidelen * x0,
 900                         node_min.Z + sidelen * z0
 901                 );
 902                 // Maximum edge of part of division
 903                 v2s16 p2d_max(
 904                         node_min.X + sidelen + sidelen * x0 - 1,
 905                         node_min.Z + sidelen + sidelen * z0 - 1
 906                 );
 907
 908                 // Get biome at center position of part of division
 909                 BiomeV6Type bt = getBiome(p2d_center);
 910
 911                 // Amount of trees
 912                 u32 tree_count;
 913                 if (bt == BT_JUNGLE || bt == BT_TAIGA || bt == BT_NORMAL) {
 914                         tree_count = area * getTreeAmount(p2d_center);
 915                         if (bt == BT_JUNGLE)
 916                                 tree_count *= 4;
 917                 } else {
 918                         tree_count = 0;
 919                 }
 920
 921                 // Add jungle grass
 922                 if (bt == BT_JUNGLE) {
 923                         float humidity = getHumidity(p2d_center);
 924                         u32 grass_count = 5 * humidity * tree_count;
 925                         for (u32 i = 0; i < grass_count; i++) {
 926                                 s16 x = grassrandom.range(p2d_min.X, p2d_max.X);
 927                                 s16 z = grassrandom.range(p2d_min.Y, p2d_max.Y);
 928                                 int mapindex = central_area_size.X * (z - node_min.Z)
 929                                                                 + (x - node_min.X);
 930                                 s16 y = heightmap[mapindex];
 931                                 if (y < water_level)
 932                                         continue;
 933
 934                                 u32 vi = vm->m_area.index(x, y, z);
 935                                 // place on dirt_with_grass, since we know it is exposed to sunlight
 936                                 if (vm->m_data[vi].getContent() == c_dirt_with_grass) {
 937                                         vm->m_area.add_y(em, vi, 1);
 938                                         vm->m_data[vi] = n_junglegrass;
 939                                 }
 940                         }
 941                 }
 942
 943                 // Put trees in random places on part of division
 944                 for (u32 i = 0; i < tree_count; i++) {
 945                         s16 x = myrand_range(p2d_min.X, p2d_max.X);
 946                         s16 z = myrand_range(p2d_min.Y, p2d_max.Y);
 947                         int mapindex = central_area_size.X * (z - node_min.Z)
 948                                                         + (x - node_min.X);
 949                         s16 y = heightmap[mapindex];
 950                         // Don't make a tree under water level
 951                         // Don't make a tree so high that it doesn't fit
 952                         if (y < water_level || y > node_max.Y - 6)
 953                                 continue;
 954
 955                         v3s16 p(x, y, z);
 956                         // Trees grow only on mud and grass and snowblock
 957                         {
 958                                 u32 i = vm->m_area.index(p);
 959                                 content_t c = vm->m_data[i].getContent();
 960                                 if (c != c_dirt &&
 961                                                 c != c_dirt_with_grass &&
 962                                                 c != c_dirt_with_snow &&
 963                                                 c != c_snowblock)
 964                                         continue;
 965                         }
 966                         p.Y++;
 967
 968                         // Make a tree
 969                         if (bt == BT_JUNGLE) {
 970                                 treegen::make_jungletree(*vm, p, ndef, myrand());
 971                         } else if (bt == BT_TAIGA) {
 972                                 treegen::make_pine_tree(*vm, p - v3s16(0, 1, 0), ndef, myrand());
 973                         } else if (bt == BT_NORMAL) {
 974                                 bool is_apple_tree = (myrand_range(0, 3) == 0) &&
 975                                                         getHaveAppleTree(v2s16(x, z));
 976                                 treegen::make_tree(*vm, p, is_apple_tree, ndef, myrand());
 977                         }
 978                 }
 979         }
 980         //printf("placeTreesAndJungleGrass: %dms\n", t.stop());
 981 }
 982
 983
 984 void MapgenV6::growGrass() // Add surface nodes
 985 {
 986         MapNode n_dirt_with_grass(c_dirt_with_grass);
 987         MapNode n_dirt_with_snow(c_dirt_with_snow);
 988         MapNode n_snowblock(c_snowblock);
 989         MapNode n_snow(c_snow);
 990         v3s16 em = vm->m_area.getExtent();
 991
 992         u32 index = 0;
 993         for (s16 z = full_node_min.Z; z <= full_node_max.Z; z++)
 994         for (s16 x = full_node_min.X; x <= full_node_max.X; x++, index++) {
 995                 // Find the lowest surface to which enough light ends up to make
 996                 // grass grow.  Basically just wait until not air and not leaves.
 997                 s16 surface_y = 0;
 998                 {
 999                         u32 i = vm->m_area.index(x, node_max.Y, z);
1000                         s16 y;
1001                         // Go to ground level
1002                         for (y = node_max.Y; y >= full_node_min.Y; y--) {
1003                                 MapNode &n = vm->m_data[i];
1004                                 if (ndef->get(n).param_type != CPT_LIGHT ||
1005                                                 ndef->get(n).liquid_type != LIQUID_NONE ||
1006                                                 n.getContent() == c_ice)
1007                                         break;
1008                                 vm->m_area.add_y(em, i, -1);
1009                         }
1010                         surface_y = (y >= full_node_min.Y) ? y : full_node_min.Y;
1011                 }
1012
1013                 BiomeV6Type bt = getBiome(index, v2s16(x, z));
1014                 u32 i = vm->m_area.index(x, surface_y, z);
1015                 content_t c = vm->m_data[i].getContent();
1016                 if (surface_y >= water_level - 20) {
1017                         if (bt == BT_TAIGA && c == c_dirt) {
1018                                 vm->m_data[i] = n_snowblock;
1019                                 vm->m_area.add_y(em, i, -1);
1020                                 vm->m_data[i] = n_dirt_with_snow;
1021                         } else if (bt == BT_TUNDRA) {
1022                                 if (c == c_dirt) {
1023                                         vm->m_data[i] = n_dirt_with_snow;
1024                                 } else if (c == c_stone && surface_y < node_max.Y) {
1025                                         vm->m_area.add_y(em, i, 1);
1026                                         vm->m_data[i] = n_snow;
1027                                 }
1028                         } else if (c == c_dirt) {
1029                                 vm->m_data[i] = n_dirt_with_grass;
1030                         }
1031                 }
1032         }
1033 }
1034
1035
1036 void MapgenV6::generateCaves(int max_stone_y)
1037 {
1038         float cave_amount = NoisePerlin2D(np_cave, node_min.X, node_min.Y, seed);
1039         int volume_nodes = (node_max.X - node_min.X + 1) *
1040                                            (node_max.Y - node_min.Y + 1) * MAP_BLOCKSIZE;
1041         cave_amount = MYMAX(0.0, cave_amount);
1042         u32 caves_count = cave_amount * volume_nodes / 50000;
1043         u32 bruises_count = 1;
1044         PseudoRandom ps(blockseed + 21343);
1045         PseudoRandom ps2(blockseed + 1032);
1046
1047         if (ps.range(1, 6) == 1)
1048                 bruises_count = ps.range(0, ps.range(0, 2));
1049
1050         if (getBiome(v2s16(node_min.X, node_min.Z)) == BT_DESERT) {
1051                 caves_count   /= 3;
1052                 bruises_count /= 3;
1053         }
1054
1055         for (u32 i = 0; i < caves_count + bruises_count; i++) {
1056                 bool large_cave = (i >= caves_count);
1057                 CaveV6 cave(this, &ps, &ps2, large_cave);
1058
1059                 cave.makeCave(node_min, node_max, max_stone_y);
1060         }
1061 }