src/mapgen_v6.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "mapgen.h"
  21 #include "voxel.h"
  22 #include "noise.h"
  23 #include "mapblock.h"
  24 #include "mapnode.h"
  25 #include "map.h"
  26 //#include "serverobject.h"
  27 #include "content_sao.h"
  28 #include "nodedef.h"
  29 #include "content_mapnode.h" // For content_mapnode_get_new_name
  30 #include "voxelalgorithms.h"
  31 #include "profiler.h"
  32 #include "settings.h" // For g_settings
  33 #include "main.h" // For g_profiler
  34 #include "emerge.h"
  35 #include "dungeongen.h"
  36 #include "cavegen.h"
  37 #include "treegen.h"
  38 #include "mg_ore.h"
  39 #include "mg_decoration.h"
  40 #include "mapgen_v6.h"
  41
  42 FlagDesc flagdesc_mapgen_v6[] = {
  43         {"jungles",    MGV6_JUNGLES},
  44         {"biomeblend", MGV6_BIOMEBLEND},
  45         {"mudflow",    MGV6_MUDFLOW},
  46         {NULL,         0}
  47 };
  48
  49 ///////////////////////////////////////////////////////////////////////////////
  50
  51
  52 MapgenV6::MapgenV6(int mapgenid, MapgenParams *params, EmergeManager *emerge)
  53         : Mapgen(mapgenid, params, emerge)
  54 {
  55         this->emerge  = emerge;
  56         this->ystride = csize.X; //////fix this
  57
  58         MapgenV6Params *sp = (MapgenV6Params *)params->sparams;
  59         this->spflags     = sp->spflags;
  60         this->freq_desert = sp->freq_desert;
  61         this->freq_beach  = sp->freq_beach;
  62
  63         np_cave        = &sp->np_cave;
  64         np_humidity    = &sp->np_humidity;
  65         np_trees       = &sp->np_trees;
  66         np_apple_trees = &sp->np_apple_trees;
  67
  68         //// Create noise objects
  69         noise_terrain_base   = new Noise(&sp->np_terrain_base,   seed, csize.X, csize.Y);
  70         noise_terrain_higher = new Noise(&sp->np_terrain_higher, seed, csize.X, csize.Y);
  71         noise_steepness      = new Noise(&sp->np_steepness,      seed, csize.X, csize.Y);
  72         noise_height_select  = new Noise(&sp->np_height_select,  seed, csize.X, csize.Y);
  73         noise_mud            = new Noise(&sp->np_mud,            seed, csize.X, csize.Y);
  74         noise_beach          = new Noise(&sp->np_beach,          seed, csize.X, csize.Y);
  75         noise_biome          = new Noise(&sp->np_biome,          seed, csize.X, csize.Y);
  76
  77         //// Resolve nodes to be used
  78         INodeDefManager *ndef = emerge->ndef;
  79
  80         c_stone           = ndef->getId("mapgen_stone");
  81         c_dirt            = ndef->getId("mapgen_dirt");
  82         c_dirt_with_grass = ndef->getId("mapgen_dirt_with_grass");
  83         c_sand            = ndef->getId("mapgen_sand");
  84         c_water_source    = ndef->getId("mapgen_water_source");
  85         c_lava_source     = ndef->getId("mapgen_lava_source");
  86         c_gravel          = ndef->getId("mapgen_gravel");
  87         c_cobble          = ndef->getId("mapgen_cobble");
  88         c_desert_sand     = ndef->getId("mapgen_desert_sand");
  89         c_desert_stone    = ndef->getId("mapgen_desert_stone");
  90         c_mossycobble     = ndef->getId("mapgen_mossycobble");
  91         c_sandbrick       = ndef->getId("mapgen_sandstonebrick");
  92         c_stair_cobble    = ndef->getId("mapgen_stair_cobble");
  93         c_stair_sandstone = ndef->getId("mapgen_stair_sandstone");
  94         if (c_desert_sand == CONTENT_IGNORE)
  95                 c_desert_sand = c_sand;
  96         if (c_desert_stone == CONTENT_IGNORE)
  97                 c_desert_stone = c_stone;
  98         if (c_mossycobble == CONTENT_IGNORE)
  99                 c_mossycobble = c_cobble;
 100         if (c_sandbrick == CONTENT_IGNORE)
 101                 c_sandbrick = c_desert_stone;
 102         if (c_stair_cobble == CONTENT_IGNORE)
 103                 c_stair_cobble = c_cobble;
 104         if (c_stair_sandstone == CONTENT_IGNORE)
 105                 c_stair_sandstone = c_sandbrick;
 106 }
 107
 108
 109 MapgenV6::~MapgenV6() {
 110         delete noise_terrain_base;
 111         delete noise_terrain_higher;
 112         delete noise_steepness;
 113         delete noise_height_select;
 114         delete noise_mud;
 115         delete noise_beach;
 116         delete noise_biome;
 117 }
 118
 119
 120 MapgenV6Params::MapgenV6Params() {
 121         spflags     = MGV6_BIOMEBLEND | MGV6_MUDFLOW;
 122         freq_desert = 0.45;
 123         freq_beach  = 0.15;
 124
 125         np_terrain_base   = NoiseParams(-4,  20.0, v3f(250.0, 250.0, 250.0), 82341,  5, 0.6, 2.0);
 126         np_terrain_higher = NoiseParams(20,  16.0, v3f(500.0, 500.0, 500.0), 85039,  5, 0.6, 2.0);
 127         np_steepness      = NoiseParams(0.85,0.5,  v3f(125.0, 125.0, 125.0), -932,   5, 0.7, 2.0);
 128         np_height_select  = NoiseParams(0,   1.0,  v3f(250.0, 250.0, 250.0), 4213,   5, 0.69, 2.0);
 129         np_mud            = NoiseParams(4,   2.0,  v3f(200.0, 200.0, 200.0), 91013,  3, 0.55, 2.0);
 130         np_beach          = NoiseParams(0,   1.0,  v3f(250.0, 250.0, 250.0), 59420,  3, 0.50, 2.0);
 131         np_biome          = NoiseParams(0,   1.0,  v3f(250.0, 250.0, 250.0), 9130,   3, 0.50, 2.0);
 132         np_cave           = NoiseParams(6,   6.0,  v3f(250.0, 250.0, 250.0), 34329,  3, 0.50, 2.0);
 133         np_humidity       = NoiseParams(0.5, 0.5,  v3f(500.0, 500.0, 500.0), 72384,  4, 0.66, 2.0);
 134         np_trees          = NoiseParams(0,   1.0,  v3f(125.0, 125.0, 125.0), 2,      4, 0.66, 2.0);
 135         np_apple_trees    = NoiseParams(0,   1.0,  v3f(100.0, 100.0, 100.0), 342902, 3, 0.45, 2.0);
 136 }
 137
 138
 139 void MapgenV6Params::readParams(Settings *settings) {
 140         settings->getFlagStrNoEx("mgv6_spflags", spflags, flagdesc_mapgen_v6);
 141         settings->getFloatNoEx("mgv6_freq_desert", freq_desert);
 142         settings->getFloatNoEx("mgv6_freq_beach",  freq_beach);
 143
 144         settings->getNoiseParams("mgv6_np_terrain_base",   np_terrain_base);
 145         settings->getNoiseParams("mgv6_np_terrain_higher", np_terrain_higher);
 146         settings->getNoiseParams("mgv6_np_steepness",      np_steepness);
 147         settings->getNoiseParams("mgv6_np_height_select",  np_height_select);
 148         settings->getNoiseParams("mgv6_np_mud",            np_mud);
 149         settings->getNoiseParams("mgv6_np_beach",          np_beach);
 150         settings->getNoiseParams("mgv6_np_biome",          np_biome);
 151         settings->getNoiseParams("mgv6_np_cave",           np_cave);
 152         settings->getNoiseParams("mgv6_np_humidity",       np_humidity);
 153         settings->getNoiseParams("mgv6_np_trees",          np_trees);
 154         settings->getNoiseParams("mgv6_np_apple_trees",    np_apple_trees);
 155 }
 156
 157
 158 void MapgenV6Params::writeParams(Settings *settings) {
 159         settings->setFlagStr("mgv6_spflags", spflags, flagdesc_mapgen_v6, (u32)-1);
 160         settings->setFloat("mgv6_freq_desert", freq_desert);
 161         settings->setFloat("mgv6_freq_beach",  freq_beach);
 162
 163         settings->setNoiseParams("mgv6_np_terrain_base",   np_terrain_base);
 164         settings->setNoiseParams("mgv6_np_terrain_higher", np_terrain_higher);
 165         settings->setNoiseParams("mgv6_np_steepness",      np_steepness);
 166         settings->setNoiseParams("mgv6_np_height_select",  np_height_select);
 167         settings->setNoiseParams("mgv6_np_mud",            np_mud);
 168         settings->setNoiseParams("mgv6_np_beach",          np_beach);
 169         settings->setNoiseParams("mgv6_np_biome",          np_biome);
 170         settings->setNoiseParams("mgv6_np_cave",           np_cave);
 171         settings->setNoiseParams("mgv6_np_humidity",       np_humidity);
 172         settings->setNoiseParams("mgv6_np_trees",          np_trees);
 173         settings->setNoiseParams("mgv6_np_apple_trees",    np_apple_trees);
 174 }
 175
 176
 177 //////////////////////// Some helper functions for the map generator
 178
 179
 180 // Returns Y one under area minimum if not found
 181 s16 MapgenV6::find_stone_level(v2s16 p2d) {
 182         v3s16 em = vm->m_area.getExtent();
 183         s16 y_nodes_max = vm->m_area.MaxEdge.Y;
 184         s16 y_nodes_min = vm->m_area.MinEdge.Y;
 185         u32 i = vm->m_area.index(p2d.X, y_nodes_max, p2d.Y);
 186         s16 y;
 187
 188         for (y = y_nodes_max; y >= y_nodes_min; y--) {
 189                 MapNode &n = vm->m_data[i];
 190                 content_t c = n.getContent();
 191                 if (c != CONTENT_IGNORE && (
 192                         c == c_stone || c == c_desert_stone))
 193                         break;
 194
 195                 vm->m_area.add_y(em, i, -1);
 196         }
 197         return (y >= y_nodes_min) ? y : y_nodes_min - 1;
 198 }
 199
 200
 201 // Required by mapgen.h
 202 bool MapgenV6::block_is_underground(u64 seed, v3s16 blockpos)
 203 {
 204         /*s16 minimum_groundlevel = (s16)get_sector_minimum_ground_level(
 205                         seed, v2s16(blockpos.X, blockpos.Z));*/
 206         // Nah, this is just a heuristic, just return something
 207         s16 minimum_groundlevel = water_level;
 208
 209         if(blockpos.Y*MAP_BLOCKSIZE + MAP_BLOCKSIZE <= minimum_groundlevel)
 210                 return true;
 211         else
 212                 return false;
 213 }
 214
 215
 216 //////////////////////// Base terrain height functions
 217
 218 float MapgenV6::baseTerrainLevel(float terrain_base, float terrain_higher,
 219                                                                         float steepness, float height_select) {
 220         float base   = 1 + terrain_base;
 221         float higher = 1 + terrain_higher;
 222
 223         // Limit higher ground level to at least base
 224         if(higher < base)
 225                 higher = base;
 226
 227         // Steepness factor of cliffs
 228         float b = steepness;
 229         b = rangelim(b, 0.0, 1000.0);
 230         b = 5 * b * b * b * b * b * b * b;
 231         b = rangelim(b, 0.5, 1000.0);
 232
 233         // Values 1.5...100 give quite horrible looking slopes
 234         if (b > 1.5 && b < 100.0)
 235                 b = (b < 10.0) ? 1.5 : 100.0;
 236
 237         float a_off = -0.20; // Offset to more low
 238         float a = 0.5 + b * (a_off + height_select);
 239         a = rangelim(a, 0.0, 1.0); // Limit
 240
 241         return base * (1.0 - a) + higher * a;
 242 }
 243
 244
 245 float MapgenV6::baseTerrainLevelFromNoise(v2s16 p) {
 246         if (flags & MG_FLAT)
 247                 return water_level;
 248
 249         float terrain_base   = NoisePerlin2DPosOffset(&noise_terrain_base->np,
 250                                                         p.X, 0.5, p.Y, 0.5, seed);
 251         float terrain_higher = NoisePerlin2DPosOffset(&noise_terrain_higher->np,
 252                                                         p.X, 0.5, p.Y, 0.5, seed);
 253         float steepness      = NoisePerlin2DPosOffset(&noise_steepness->np,
 254                                                         p.X, 0.5, p.Y, 0.5, seed);
 255         float height_select  = NoisePerlin2DNoTxfmPosOffset(&noise_height_select->np,
 256                                                         p.X, 0.5, p.Y, 0.5, seed);
 257
 258         return baseTerrainLevel(terrain_base, terrain_higher,
 259                                                         steepness,    height_select);
 260 }
 261
 262
 263 float MapgenV6::baseTerrainLevelFromMap(v2s16 p) {
 264         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 265         return baseTerrainLevelFromMap(index);
 266 }
 267
 268
 269 float MapgenV6::baseTerrainLevelFromMap(int index) {
 270         if (flags & MG_FLAT)
 271                 return water_level;
 272
 273         float terrain_base   = noise_terrain_base->result[index];
 274         float terrain_higher = noise_terrain_higher->result[index];
 275         float steepness      = noise_steepness->result[index];
 276         float height_select  = noise_height_select->result[index];
 277
 278         return baseTerrainLevel(terrain_base, terrain_higher,
 279                                                         steepness,    height_select);
 280 }
 281
 282
 283 s16 MapgenV6::find_ground_level_from_noise(u64 seed, v2s16 p2d, s16 precision) {
 284         return baseTerrainLevelFromNoise(p2d) + AVERAGE_MUD_AMOUNT;
 285 }
 286
 287
 288 int MapgenV6::getGroundLevelAtPoint(v2s16 p) {
 289         return baseTerrainLevelFromNoise(p) + AVERAGE_MUD_AMOUNT;
 290 }
 291
 292
 293 //////////////////////// Noise functions
 294
 295 float MapgenV6::getMudAmount(v2s16 p) {
 296         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 297         return getMudAmount(index);
 298 }
 299
 300
 301 bool MapgenV6::getHaveBeach(v2s16 p) {
 302         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 303         return getHaveBeach(index);
 304 }
 305
 306
 307 BiomeV6Type MapgenV6::getBiome(v2s16 p) {
 308         int index = (p.Y - node_min.Z) * ystride + (p.X - node_min.X);
 309         return getBiome(index, p);
 310 }
 311
 312
 313 float MapgenV6::getHumidity(v2s16 p)
 314 {
 315         /*double noise = noise2d_perlin(
 316                 0.5+(float)p.X/500, 0.5+(float)p.Y/500,
 317                 seed+72384, 4, 0.66);
 318         noise = (noise + 1.0)/2.0;*/
 319
 320         float noise = NoisePerlin2D(np_humidity, p.X, p.Y, seed);
 321
 322         if (noise < 0.0)
 323                 noise = 0.0;
 324         if (noise > 1.0)
 325                 noise = 1.0;
 326         return noise;
 327 }
 328
 329
 330 float MapgenV6::getTreeAmount(v2s16 p)
 331 {
 332         /*double noise = noise2d_perlin(
 333                         0.5+(float)p.X/125, 0.5+(float)p.Y/125,
 334                         seed+2, 4, 0.66);*/
 335
 336         float noise = NoisePerlin2D(np_trees, p.X, p.Y, seed);
 337         float zeroval = -0.39;
 338         if (noise < zeroval)
 339                 return 0;
 340         else
 341                 return 0.04 * (noise-zeroval) / (1.0-zeroval);
 342 }
 343
 344
 345 bool MapgenV6::getHaveAppleTree(v2s16 p)
 346 {
 347         /*is_apple_tree = noise2d_perlin(
 348                 0.5+(float)p.X/100, 0.5+(float)p.Z/100,
 349                 data->seed+342902, 3, 0.45) > 0.2;*/
 350
 351         float noise = NoisePerlin2D(np_apple_trees, p.X, p.Y, seed);
 352
 353         return noise > 0.2;
 354 }
 355
 356
 357 float MapgenV6::getMudAmount(int index)
 358 {
 359         if (flags & MG_FLAT)
 360                 return AVERAGE_MUD_AMOUNT;
 361
 362         /*return ((float)AVERAGE_MUD_AMOUNT + 2.0 * noise2d_perlin(
 363                         0.5+(float)p.X/200, 0.5+(float)p.Y/200,
 364                         seed+91013, 3, 0.55));*/
 365
 366         return noise_mud->result[index];
 367 }
 368
 369
 370 bool MapgenV6::getHaveBeach(int index)
 371 {
 372         // Determine whether to have sand here
 373         /*double sandnoise = noise2d_perlin(
 374                         0.2+(float)p2d.X/250, 0.7+(float)p2d.Y/250,
 375                         seed+59420, 3, 0.50);*/
 376
 377         float sandnoise = noise_beach->result[index];
 378         return (sandnoise > freq_beach);
 379 }
 380
 381
 382 BiomeV6Type MapgenV6::getBiome(int index, v2s16 p)
 383 {
 384         // Just do something very simple as for now
 385         /*double d = noise2d_perlin(
 386                         0.6+(float)p2d.X/250, 0.2+(float)p2d.Y/250,
 387                         seed+9130, 3, 0.50);*/
 388
 389         float d = noise_biome->result[index];
 390         if (d > freq_desert)
 391                 return BT_DESERT;
 392
 393         if ((spflags & MGV6_BIOMEBLEND) &&
 394                 (d > freq_desert - 0.10) &&
 395                 ((noise2d(p.X, p.Y, seed) + 1.0) > (freq_desert - d) * 20.0))
 396                 return BT_DESERT;
 397
 398         return BT_NORMAL;
 399 }
 400
 401
 402 u32 MapgenV6::get_blockseed(u64 seed, v3s16 p)
 403 {
 404         s32 x=p.X, y=p.Y, z=p.Z;
 405         return (u32)(seed%0x100000000ULL) + z*38134234 + y*42123 + x*23;
 406 }
 407
 408
 409 //////////////////////// Map generator
 410
 411 void MapgenV6::makeChunk(BlockMakeData *data) {
 412         assert(data->vmanip);
 413         assert(data->nodedef);
 414         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 415                    data->blockpos_requested.Y >= data->blockpos_min.Y &&
 416                    data->blockpos_requested.Z >= data->blockpos_min.Z);
 417         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 418                    data->blockpos_requested.Y <= data->blockpos_max.Y &&
 419                    data->blockpos_requested.Z <= data->blockpos_max.Z);
 420
 421         this->generating = true;
 422         this->vm   = data->vmanip;
 423         this->ndef = data->nodedef;
 424
 425         // Hack: use minimum block coords for old code that assumes a single block
 426         v3s16 blockpos = data->blockpos_requested;
 427         v3s16 blockpos_min = data->blockpos_min;
 428         v3s16 blockpos_max = data->blockpos_max;
 429
 430         // Area of central chunk
 431         node_min = blockpos_min*MAP_BLOCKSIZE;
 432         node_max = (blockpos_max+v3s16(1,1,1))*MAP_BLOCKSIZE-v3s16(1,1,1);
 433
 434         // Full allocated area
 435         full_node_min = (blockpos_min-1)*MAP_BLOCKSIZE;
 436         full_node_max = (blockpos_max+2)*MAP_BLOCKSIZE-v3s16(1,1,1);
 437
 438         central_area_size = node_max - node_min + v3s16(1,1,1);
 439         assert(central_area_size.X == central_area_size.Z);
 440
 441         int volume_blocks = (blockpos_max.X - blockpos_min.X + 1)
 442                                           * (blockpos_max.Y - blockpos_min.Y + 1)
 443                                           * (blockpos_max.Z - blockpos_max.Z + 1);
 444
 445         volume_nodes = volume_blocks *
 446                 MAP_BLOCKSIZE * MAP_BLOCKSIZE * MAP_BLOCKSIZE;
 447
 448         // Create a block-specific seed
 449         blockseed = get_blockseed(data->seed, full_node_min);
 450
 451         // Make some noise
 452         calculateNoise();
 453
 454         // Maximum height of the stone surface and obstacles.
 455         // This is used to guide the cave generation
 456         s16 stone_surface_max_y;
 457
 458         // Generate general ground level to full area
 459         stone_surface_max_y = generateGround();
 460
 461         generateExperimental();
 462
 463         const s16 max_spread_amount = MAP_BLOCKSIZE;
 464         // Limit dirt flow area by 1 because mud is flown into neighbors.
 465         s16 mudflow_minpos = -max_spread_amount + 1;
 466         s16 mudflow_maxpos = central_area_size.X + max_spread_amount - 2;
 467
 468         // Loop this part, it will make stuff look older and newer nicely
 469         const u32 age_loops = 2;
 470         for (u32 i_age = 0; i_age < age_loops; i_age++) { // Aging loop
 471                 // Make caves (this code is relatively horrible)
 472                 if (flags & MG_CAVES)
 473                         generateCaves(stone_surface_max_y);
 474
 475                 // Add mud to the central chunk
 476                 addMud();
 477
 478                 // Add blobs of dirt and gravel underground
 479                 addDirtGravelBlobs();
 480
 481                 // Flow mud away from steep edges
 482                 if (spflags & MGV6_MUDFLOW)
 483                         flowMud(mudflow_minpos, mudflow_maxpos);
 484
 485         }
 486
 487         // Add dungeons
 488         if (flags & MG_DUNGEONS) {
 489                 DungeonParams dp;
 490
 491                 dp.np_rarity  = nparams_dungeon_rarity;
 492                 dp.np_density = nparams_dungeon_density;
 493                 dp.np_wetness = nparams_dungeon_wetness;
 494                 dp.c_water = c_water_source;
 495                 if (getBiome(0, v2s16(node_min.X, node_min.Z)) == BT_NORMAL) {
 496                         dp.c_cobble  = c_cobble;
 497                         dp.c_moss    = c_mossycobble;
 498                         dp.c_stair   = c_stair_cobble;
 499
 500                         dp.diagonal_dirs = false;
 501                         dp.mossratio  = 3.0;
 502                         dp.holesize   = v3s16(1, 2, 1);
 503                         dp.roomsize   = v3s16(0, 0, 0);
 504                         dp.notifytype = GENNOTIFY_DUNGEON;
 505                 } else {
 506                         dp.c_cobble  = c_sandbrick;
 507                         dp.c_moss    = c_sandbrick; // should make this 'cracked sandstone' later
 508                         dp.c_stair   = c_stair_sandstone;
 509
 510                         dp.diagonal_dirs = true;
 511                         dp.mossratio  = 0.0;
 512                         dp.holesize   = v3s16(2, 3, 2);
 513                         dp.roomsize   = v3s16(2, 5, 2);
 514                         dp.notifytype = GENNOTIFY_TEMPLE;
 515                 }
 516
 517                 DungeonGen dgen(this, &dp);
 518                 dgen.generate(blockseed, full_node_min, full_node_max);
 519         }
 520
 521         // Add top and bottom side of water to transforming_liquid queue
 522         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 523
 524         // Grow grass
 525         growGrass();
 526
 527         // Generate some trees, and add grass, if a jungle
 528         if (flags & MG_TREES)
 529                 placeTreesAndJungleGrass();
 530
 531         // Generate the registered decorations
 532         emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
 533
 534         // Generate the registered ores
 535         emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
 536
 537         // Calculate lighting
 538         if (flags & MG_LIGHT)
 539                 calcLighting(node_min - v3s16(1, 1, 1) * MAP_BLOCKSIZE,
 540                                          node_max + v3s16(1, 0, 1) * MAP_BLOCKSIZE);
 541
 542         this->generating = false;
 543 }
 544
 545
 546 void MapgenV6::calculateNoise() {
 547         int x = node_min.X;
 548         int z = node_min.Z;
 549
 550         // Need to adjust for the original implementation's +.5 offset...
 551         if (!(flags & MG_FLAT)) {
 552                 noise_terrain_base->perlinMap2D(
 553                         x + 0.5 * noise_terrain_base->np.spread.X,
 554                         z + 0.5 * noise_terrain_base->np.spread.Z);
 555
 556                 noise_terrain_higher->perlinMap2D(
 557                         x + 0.5 * noise_terrain_higher->np.spread.X,
 558                         z + 0.5 * noise_terrain_higher->np.spread.Z);
 559
 560                 noise_steepness->perlinMap2D(
 561                         x + 0.5 * noise_steepness->np.spread.X,
 562                         z + 0.5 * noise_steepness->np.spread.Z);
 563
 564                 noise_height_select->perlinMap2D(
 565                         x + 0.5 * noise_height_select->np.spread.X,
 566                         z + 0.5 * noise_height_select->np.spread.Z);
 567
 568                 noise_mud->perlinMap2D(
 569                         x + 0.5 * noise_mud->np.spread.X,
 570                         z + 0.5 * noise_mud->np.spread.Z);
 571         }
 572
 573         noise_beach->perlinMap2D(
 574                 x + 0.2 * noise_beach->np.spread.X,
 575                 z + 0.7 * noise_beach->np.spread.Z);
 576
 577         noise_biome->perlinMap2D(
 578                 x + 0.6 * noise_biome->np.spread.X,
 579                 z + 0.2 * noise_biome->np.spread.Z);
 580 }
 581
 582
 583 int MapgenV6::generateGround() {
 584         //TimeTaker timer1("Generating ground level");
 585         MapNode n_air(CONTENT_AIR), n_water_source(c_water_source);
 586         MapNode n_stone(c_stone), n_desert_stone(c_desert_stone);
 587         int stone_surface_max_y = -MAP_GENERATION_LIMIT;
 588         u32 index = 0;
 589
 590         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 591         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 592                 // Surface height
 593                 s16 surface_y = (s16)baseTerrainLevelFromMap(index);
 594
 595                 // Log it
 596                 if (surface_y > stone_surface_max_y)
 597                         stone_surface_max_y = surface_y;
 598
 599                 BiomeV6Type bt = getBiome(index, v2s16(x, z));
 600
 601                 // Fill ground with stone
 602                 v3s16 em = vm->m_area.getExtent();
 603                 u32 i = vm->m_area.index(x, node_min.Y, z);
 604                 for (s16 y = node_min.Y; y <= node_max.Y; y++) {
 605                         if (vm->m_data[i].getContent() == CONTENT_IGNORE) {
 606                                 if (y <= surface_y) {
 607                                         vm->m_data[i] = (y > water_level && bt == BT_DESERT) ?
 608                                                 n_desert_stone : n_stone;
 609                                 } else if (y <= water_level) {
 610                                         vm->m_data[i] = n_water_source;
 611                                 } else {
 612                                         vm->m_data[i] = n_air;
 613                                 }
 614                         }
 615                         vm->m_area.add_y(em, i, 1);
 616                 }
 617         }
 618
 619         return stone_surface_max_y;
 620 }
 621
 622
 623 void MapgenV6::addMud() {
 624         // 15ms @cs=8
 625         //TimeTaker timer1("add mud");
 626         MapNode n_dirt(c_dirt), n_gravel(c_gravel);
 627         MapNode n_sand(c_sand), n_desert_sand(c_desert_sand);
 628         MapNode addnode;
 629
 630         u32 index = 0;
 631         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 632         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 633                 // Randomize mud amount
 634                 s16 mud_add_amount = getMudAmount(index) / 2.0 + 0.5;
 635
 636                 // Find ground level
 637                 s16 surface_y = find_stone_level(v2s16(x, z)); /////////////////optimize this!
 638
 639                 // Handle area not found
 640                 if (surface_y == vm->m_area.MinEdge.Y - 1)
 641                         continue;
 642
 643                 BiomeV6Type bt = getBiome(index, v2s16(x, z));
 644                 addnode = (bt == BT_DESERT) ? n_desert_sand : n_dirt;
 645
 646                 if (bt == BT_DESERT && surface_y + mud_add_amount <= water_level + 1) {
 647                         addnode = n_sand;
 648                 } else if (mud_add_amount <= 0) {
 649                         mud_add_amount = 1 - mud_add_amount;
 650                         addnode = n_gravel;
 651                 } else if (bt == BT_NORMAL && getHaveBeach(index) &&
 652                                 surface_y + mud_add_amount <= water_level + 2) {
 653                         addnode = n_sand;
 654                 }
 655
 656                 if (bt == BT_DESERT && surface_y > 20)
 657                         mud_add_amount = MYMAX(0, mud_add_amount - (surface_y - 20) / 5);
 658
 659                 // If topmost node is grass, change it to mud.  It might be if it was
 660                 // flown to there from a neighboring chunk and then converted.
 661                 u32 i = vm->m_area.index(x, surface_y, z);
 662                 if (vm->m_data[i].getContent() == c_dirt_with_grass)
 663                         vm->m_data[i] = n_dirt;
 664
 665                 // Add mud on ground
 666                 s16 mudcount = 0;
 667                 v3s16 em = vm->m_area.getExtent();
 668                 s16 y_start = surface_y + 1;
 669                 i = vm->m_area.index(x, y_start, z);
 670                 for (s16 y = y_start; y <= node_max.Y; y++) {
 671                         if (mudcount >= mud_add_amount)
 672                                 break;
 673
 674                         vm->m_data[i] = addnode;
 675                         mudcount++;
 676
 677                         vm->m_area.add_y(em, i, 1);
 678                 }
 679         }
 680 }
 681
 682
 683 void MapgenV6::flowMud(s16 &mudflow_minpos, s16 &mudflow_maxpos) {
 684         // 340ms @cs=8
 685         TimeTaker timer1("flow mud");
 686
 687         // Iterate a few times
 688         for(s16 k = 0; k < 3; k++) {
 689                 for (s16 z = mudflow_minpos; z <= mudflow_maxpos; z++)
 690                 for (s16 x = mudflow_minpos; x <= mudflow_maxpos; x++) {
 691                         // Invert coordinates every 2nd iteration
 692                         if (k % 2 == 0) {
 693                                 x = mudflow_maxpos - (x - mudflow_minpos);
 694                                 z = mudflow_maxpos - (z - mudflow_minpos);
 695                         }
 696
 697                         // Node position in 2d
 698                         v2s16 p2d = v2s16(node_min.X, node_min.Z) + v2s16(x, z);
 699
 700                         v3s16 em = vm->m_area.getExtent();
 701                         u32 i = vm->m_area.index(p2d.X, node_max.Y, p2d.Y);
 702                         s16 y = node_max.Y;
 703
 704                         while(y >= node_min.Y)
 705                         {
 706
 707                         for(;; y--)
 708                         {
 709                                 MapNode *n = NULL;
 710                                 // Find mud
 711                                 for(; y >= node_min.Y; y--) {
 712                                         n = &vm->m_data[i];
 713                                         if (n->getContent() == c_dirt ||
 714                                                 n->getContent() == c_dirt_with_grass ||
 715                                                 n->getContent() == c_gravel)
 716                                                 break;
 717
 718                                         vm->m_area.add_y(em, i, -1);
 719                                 }
 720
 721                                 // Stop if out of area
 722                                 //if(vmanip.m_area.contains(i) == false)
 723                                 if (y < node_min.Y)
 724                                         break;
 725
 726                                 if (n->getContent() == c_dirt ||
 727                                         n->getContent() == c_dirt_with_grass)
 728                                 {
 729                                         // Make it exactly mud
 730                                         n->setContent(c_dirt);
 731
 732                                         // Don't flow it if the stuff under it is not mud
 733                                         {
 734                                                 u32 i2 = i;
 735                                                 vm->m_area.add_y(em, i2, -1);
 736                                                 // Cancel if out of area
 737                                                 if(vm->m_area.contains(i2) == false)
 738                                                         continue;
 739                                                 MapNode *n2 = &vm->m_data[i2];
 740                                                 if (n2->getContent() != c_dirt &&
 741                                                         n2->getContent() != c_dirt_with_grass)
 742                                                         continue;
 743                                         }
 744                                 }
 745
 746                                 v3s16 dirs4[4] = {
 747                                         v3s16(0,0,1), // back
 748                                         v3s16(1,0,0), // right
 749                                         v3s16(0,0,-1), // front
 750                                         v3s16(-1,0,0), // left
 751                                 };
 752
 753                                 // Check that upper is air or doesn't exist.
 754                                 // Cancel dropping if upper keeps it in place
 755                                 u32 i3 = i;
 756                                 vm->m_area.add_y(em, i3, 1);
 757                                 if (vm->m_area.contains(i3) == true &&
 758                                         ndef->get(vm->m_data[i3]).walkable)
 759                                         continue;
 760
 761                                 // Drop mud on side
 762                                 for(u32 di=0; di<4; di++) {
 763                                         v3s16 dirp = dirs4[di];
 764                                         u32 i2 = i;
 765                                         // Move to side
 766                                         vm->m_area.add_p(em, i2, dirp);
 767                                         // Fail if out of area
 768                                         if (vm->m_area.contains(i2) == false)
 769                                                 continue;
 770                                         // Check that side is air
 771                                         MapNode *n2 = &vm->m_data[i2];
 772                                         if (ndef->get(*n2).walkable)
 773                                                 continue;
 774                                         // Check that under side is air
 775                                         vm->m_area.add_y(em, i2, -1);
 776                                         if (vm->m_area.contains(i2) == false)
 777                                                 continue;
 778                                         n2 = &vm->m_data[i2];
 779                                         if (ndef->get(*n2).walkable)
 780                                                 continue;
 781                                         // Loop further down until not air
 782                                         bool dropped_to_unknown = false;
 783                                         do {
 784                                                 vm->m_area.add_y(em, i2, -1);
 785                                                 n2 = &vm->m_data[i2];
 786                                                 // if out of known area
 787                                                 if(vm->m_area.contains(i2) == false ||
 788                                                         n2->getContent() == CONTENT_IGNORE) {
 789                                                         dropped_to_unknown = true;
 790                                                         break;
 791                                                 }
 792                                         } while (ndef->get(*n2).walkable == false);
 793                                         // Loop one up so that we're in air
 794                                         vm->m_area.add_y(em, i2, 1);
 795                                         n2 = &vm->m_data[i2];
 796
 797                                         bool old_is_water = (n->getContent() == c_water_source);
 798                                         // Move mud to new place
 799                                         if (!dropped_to_unknown) {
 800                                                 *n2 = *n;
 801                                                 // Set old place to be air (or water)
 802                                                 if(old_is_water)
 803                                                         *n = MapNode(c_water_source);
 804                                                 else
 805                                                         *n = MapNode(CONTENT_AIR);
 806                                         }
 807
 808                                         // Done
 809                                         break;
 810                                 }
 811                         }
 812                         }
 813                 }
 814         }
 815 }
 816
 817
 818 void MapgenV6::addDirtGravelBlobs() {
 819         if (getBiome(v2s16(node_min.X, node_min.Z)) != BT_NORMAL)
 820                 return;
 821
 822         PseudoRandom pr(blockseed + 983);
 823         for (int i = 0; i < volume_nodes/10/10/10; i++) {
 824                 bool only_fill_cave = (myrand_range(0,1) != 0);
 825                 v3s16 size(
 826                         pr.range(1, 8),
 827                         pr.range(1, 8),
 828                         pr.range(1, 8)
 829                 );
 830                 v3s16 p0(
 831                         pr.range(node_min.X, node_max.X) - size.X / 2,
 832                         pr.range(node_min.Y, node_max.Y) - size.Y / 2,
 833                         pr.range(node_min.Z, node_max.Z) - size.Z / 2
 834                 );
 835
 836                 MapNode n1((p0.Y > -32 && !pr.range(0, 1)) ? c_dirt : c_gravel);
 837                 for (int z1 = 0; z1 < size.Z; z1++)
 838                 for (int y1 = 0; y1 < size.Y; y1++)
 839                 for (int x1 = 0; x1 < size.X; x1++) {
 840                         v3s16 p = p0 + v3s16(x1, y1, z1);
 841                         u32 i = vm->m_area.index(p);
 842                         if (!vm->m_area.contains(i))
 843                                 continue;
 844                         // Cancel if not stone and not cave air
 845                         if (vm->m_data[i].getContent() != c_stone &&
 846                                 !(vm->m_flags[i] & VMANIP_FLAG_CAVE))
 847                                 continue;
 848                         if (only_fill_cave && !(vm->m_flags[i] & VMANIP_FLAG_CAVE))
 849                                 continue;
 850                         vm->m_data[i] = n1;
 851                 }
 852         }
 853 }
 854
 855
 856 void MapgenV6::placeTreesAndJungleGrass() {
 857         //TimeTaker t("placeTrees");
 858         if (node_max.Y < water_level)
 859                 return;
 860
 861         PseudoRandom grassrandom(blockseed + 53);
 862         content_t c_junglegrass = ndef->getId("mapgen_junglegrass");
 863         // if we don't have junglegrass, don't place cignore... that's bad
 864         if (c_junglegrass == CONTENT_IGNORE)
 865                 c_junglegrass = CONTENT_AIR;
 866         MapNode n_junglegrass(c_junglegrass);
 867         v3s16 em = vm->m_area.getExtent();
 868
 869         // Divide area into parts
 870         s16 div = 8;
 871         s16 sidelen = central_area_size.X / div;
 872         double area = sidelen * sidelen;
 873
 874         // N.B.  We must add jungle grass first, since tree leaves will
 875         // obstruct the ground, giving us a false ground level
 876         for (s16 z0 = 0; z0 < div; z0++)
 877         for (s16 x0 = 0; x0 < div; x0++) {
 878                 // Center position of part of division
 879                 v2s16 p2d_center(
 880                         node_min.X + sidelen / 2 + sidelen * x0,
 881                         node_min.Z + sidelen / 2 + sidelen * z0
 882                 );
 883                 // Minimum edge of part of division
 884                 v2s16 p2d_min(
 885                         node_min.X + sidelen * x0,
 886                         node_min.Z + sidelen * z0
 887                 );
 888                 // Maximum edge of part of division
 889                 v2s16 p2d_max(
 890                         node_min.X + sidelen + sidelen * x0 - 1,
 891                         node_min.Z + sidelen + sidelen * z0 - 1
 892                 );
 893
 894                 // Amount of trees, jungle area
 895                 u32 tree_count = area * getTreeAmount(p2d_center);
 896
 897                 float humidity;
 898                 bool is_jungle = false;
 899                 if (spflags & MGV6_JUNGLES) {
 900                         humidity = getHumidity(p2d_center);
 901                         if (humidity > 0.75) {
 902                                 is_jungle = true;
 903                                 tree_count *= 4;
 904                         }
 905                 }
 906
 907                 // Add jungle grass
 908                 if (is_jungle) {
 909                         u32 grass_count = 5 * humidity * tree_count;
 910                         for (u32 i = 0; i < grass_count; i++) {
 911                                 s16 x = grassrandom.range(p2d_min.X, p2d_max.X);
 912                                 s16 z = grassrandom.range(p2d_min.Y, p2d_max.Y);
 913
 914                                 s16 y = findGroundLevelFull(v2s16(x, z)); ////////////////optimize this!
 915                                 if (y < water_level || y < node_min.Y || y > node_max.Y)
 916                                         continue;
 917
 918                                 u32 vi = vm->m_area.index(x, y, z);
 919                                 // place on dirt_with_grass, since we know it is exposed to sunlight
 920                                 if (vm->m_data[vi].getContent() == c_dirt_with_grass) {
 921                                         vm->m_area.add_y(em, vi, 1);
 922                                         vm->m_data[vi] = n_junglegrass;
 923                                 }
 924                         }
 925                 }
 926
 927                 // Put trees in random places on part of division
 928                 for (u32 i = 0; i < tree_count; i++) {
 929                         s16 x = myrand_range(p2d_min.X, p2d_max.X);
 930                         s16 z = myrand_range(p2d_min.Y, p2d_max.Y);
 931                         s16 y = findGroundLevelFull(v2s16(x, z)); ////////////////////optimize this!
 932                         // Don't make a tree under water level
 933                         // Don't make a tree so high that it doesn't fit
 934                         if(y < water_level || y > node_max.Y - 6)
 935                                 continue;
 936
 937                         v3s16 p(x,y,z);
 938                         // Trees grow only on mud and grass
 939                         {
 940                                 u32 i = vm->m_area.index(p);
 941                                 MapNode *n = &vm->m_data[i];
 942                                 if (n->getContent() != c_dirt &&
 943                                         n->getContent() != c_dirt_with_grass)
 944                                         continue;
 945                         }
 946                         p.Y++;
 947
 948                         // Make a tree
 949                         if (is_jungle) {
 950                                 treegen::make_jungletree(*vm, p, ndef, myrand());
 951                         } else {
 952                                 bool is_apple_tree = (myrand_range(0, 3) == 0) &&
 953                                                                                 getHaveAppleTree(v2s16(x, z));
 954                                 treegen::make_tree(*vm, p, is_apple_tree, ndef, myrand());
 955                         }
 956                 }
 957         }
 958         //printf("placeTreesAndJungleGrass: %dms\n", t.stop());
 959 }
 960
 961
 962 void MapgenV6::growGrass() {
 963         for (s16 z = full_node_min.Z; z <= full_node_max.Z; z++)
 964         for (s16 x = full_node_min.X; x <= full_node_max.X; x++) {
 965                 // Find the lowest surface to which enough light ends up to make
 966                 // grass grow.  Basically just wait until not air and not leaves.
 967                 s16 surface_y = 0;
 968                 {
 969                         v3s16 em = vm->m_area.getExtent();
 970                         u32 i = vm->m_area.index(x, node_max.Y, z);
 971                         s16 y;
 972                         // Go to ground level
 973                         for (y = node_max.Y; y >= full_node_min.Y; y--) {
 974                                 MapNode &n = vm->m_data[i];
 975                                 if (ndef->get(n).param_type != CPT_LIGHT ||
 976                                         ndef->get(n).liquid_type != LIQUID_NONE)
 977                                         break;
 978                                 vm->m_area.add_y(em, i, -1);
 979                         }
 980                         surface_y = (y >= full_node_min.Y) ? y : full_node_min.Y;
 981                 }
 982
 983                 u32 i = vm->m_area.index(x, surface_y, z);
 984                 MapNode *n = &vm->m_data[i];
 985                 if (n->getContent() == c_dirt && surface_y >= water_level - 20)
 986                         n->setContent(c_dirt_with_grass);
 987         }
 988 }
 989
 990
 991 void MapgenV6::generateCaves(int max_stone_y) {
 992         float cave_amount = NoisePerlin2D(np_cave, node_min.X, node_min.Y, seed);
 993         int volume_nodes = (node_max.X - node_min.X + 1) *
 994                                            (node_max.Y - node_min.Y + 1) * MAP_BLOCKSIZE;
 995         cave_amount = MYMAX(0.0, cave_amount);
 996         u32 caves_count = cave_amount * volume_nodes / 50000;
 997         u32 bruises_count = 1;
 998         PseudoRandom ps(blockseed + 21343);
 999         PseudoRandom ps2(blockseed + 1032);
1000
1001         if (ps.range(1, 6) == 1)
1002                 bruises_count = ps.range(0, ps.range(0, 2));
1003
1004         if (getBiome(v2s16(node_min.X, node_min.Z)) == BT_DESERT) {
1005                 caves_count   /= 3;
1006                 bruises_count /= 3;
1007         }
1008
1009         for (u32 i = 0; i < caves_count + bruises_count; i++) {
1010                 bool large_cave = (i >= caves_count);
1011                 CaveV6 cave(this, &ps, &ps2, large_cave);
1012
1013                 cave.makeCave(node_min, node_max, max_stone_y);
1014         }
1015 }