src/mapgen_v7.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2015 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
   4 Copyright (C) 2010-2015 paramat, Matt Gregory
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU Lesser General Public License as published by
   8 the Free Software Foundation; either version 2.1 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU Lesser General Public License for more details.
  15
  16 You should have received a copy of the GNU Lesser General Public License along
  17 with this program; if not, write to the Free Software Foundation, Inc.,
  18 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19 */
  20
  21
  22 #include "mapgen.h"
  23 #include "voxel.h"
  24 #include "noise.h"
  25 #include "mapblock.h"
  26 #include "mapnode.h"
  27 #include "map.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_biome.h"
  38 #include "mg_ore.h"
  39 #include "mg_decoration.h"
  40 #include "mapgen_v7.h"
  41
  42
  43 FlagDesc flagdesc_mapgen_v7[] = {
  44         {"mountains", MGV7_MOUNTAINS},
  45         {"ridges",    MGV7_RIDGES},
  46         {NULL,        0}
  47 };
  48
  49
  50 ///////////////////////////////////////////////////////////////////////////////
  51
  52
  53 MapgenV7::MapgenV7(int mapgenid, MapgenParams *params, EmergeManager *emerge)
  54         : Mapgen(mapgenid, params, emerge)
  55 {
  56         this->m_emerge = emerge;
  57         this->bmgr     = emerge->biomemgr;
  58
  59         //// amount of elements to skip for the next index
  60         //// for noise/height/biome maps (not vmanip)
  61         this->ystride = csize.X;
  62         // 1-down overgeneration
  63         this->zstride_1d = csize.X * (csize.Y + 1);
  64
  65         this->biomemap        = new u8[csize.X * csize.Z];
  66         this->heightmap       = new s16[csize.X * csize.Z];
  67         this->heatmap         = NULL;
  68         this->humidmap        = NULL;
  69         this->ridge_heightmap = new s16[csize.X * csize.Z];
  70
  71         MapgenV7Params *sp = (MapgenV7Params *)params->sparams;
  72         this->spflags = sp->spflags;
  73
  74         //// Terrain noise
  75         noise_terrain_base    = new Noise(&sp->np_terrain_base,    seed, csize.X, csize.Z);
  76         noise_terrain_alt     = new Noise(&sp->np_terrain_alt,     seed, csize.X, csize.Z);
  77         noise_terrain_persist = new Noise(&sp->np_terrain_persist, seed, csize.X, csize.Z);
  78         noise_height_select   = new Noise(&sp->np_height_select,   seed, csize.X, csize.Z);
  79         noise_filler_depth    = new Noise(&sp->np_filler_depth,    seed, csize.X, csize.Z);
  80         noise_mount_height    = new Noise(&sp->np_mount_height,    seed, csize.X, csize.Z);
  81         noise_ridge_uwater    = new Noise(&sp->np_ridge_uwater,    seed, csize.X, csize.Z);
  82
  83         //// 3d terrain noise
  84         // 1-up 1-down overgeneration
  85         noise_mountain = new Noise(&sp->np_mountain, seed, csize.X, csize.Y + 2, csize.Z);
  86         noise_ridge    = new Noise(&sp->np_ridge,    seed, csize.X, csize.Y + 2, csize.Z);
  87         // 1-down overgeneraion
  88         noise_cave1    = new Noise(&sp->np_cave1,    seed, csize.X, csize.Y + 1, csize.Z);
  89         noise_cave2    = new Noise(&sp->np_cave2,    seed, csize.X, csize.Y + 1, csize.Z);
  90
  91         //// Biome noise
  92         noise_heat           = new Noise(&params->np_biome_heat,           seed, csize.X, csize.Z);
  93         noise_humidity       = new Noise(&params->np_biome_humidity,       seed, csize.X, csize.Z);
  94         noise_heat_blend     = new Noise(&params->np_biome_heat_blend,     seed, csize.X, csize.Z);
  95         noise_humidity_blend = new Noise(&params->np_biome_humidity_blend, seed, csize.X, csize.Z);
  96
  97         //// Resolve nodes to be used
  98         INodeDefManager *ndef = emerge->ndef;
  99
 100         c_stone                = ndef->getId("mapgen_stone");
 101         c_water_source         = ndef->getId("mapgen_water_source");
 102         c_lava_source          = ndef->getId("mapgen_lava_source");
 103         c_desert_stone         = ndef->getId("mapgen_desert_stone");
 104         c_ice                  = ndef->getId("mapgen_ice");
 105         c_sandstone            = ndef->getId("mapgen_sandstone");
 106
 107         c_cobble               = ndef->getId("mapgen_cobble");
 108         c_stair_cobble         = ndef->getId("mapgen_stair_cobble");
 109         c_mossycobble          = ndef->getId("mapgen_mossycobble");
 110         c_sandstonebrick       = ndef->getId("mapgen_sandstonebrick");
 111         c_stair_sandstonebrick = ndef->getId("mapgen_stair_sandstonebrick");
 112
 113         if (c_ice == CONTENT_IGNORE)
 114                 c_ice = CONTENT_AIR;
 115         if (c_mossycobble == CONTENT_IGNORE)
 116                 c_mossycobble = c_cobble;
 117         if (c_stair_cobble == CONTENT_IGNORE)
 118                 c_stair_cobble = c_cobble;
 119         if (c_sandstonebrick == CONTENT_IGNORE)
 120                 c_sandstonebrick = c_sandstone;
 121         if (c_stair_sandstonebrick == CONTENT_IGNORE)
 122                 c_stair_sandstonebrick = c_sandstone;
 123 }
 124
 125
 126 MapgenV7::~MapgenV7()
 127 {
 128         delete noise_terrain_base;
 129         delete noise_terrain_persist;
 130         delete noise_height_select;
 131         delete noise_terrain_alt;
 132         delete noise_filler_depth;
 133         delete noise_mount_height;
 134         delete noise_ridge_uwater;
 135         delete noise_mountain;
 136         delete noise_ridge;
 137         delete noise_cave1;
 138         delete noise_cave2;
 139
 140         delete noise_heat;
 141         delete noise_humidity;
 142         delete noise_heat_blend;
 143         delete noise_humidity_blend;
 144
 145         delete[] ridge_heightmap;
 146         delete[] heightmap;
 147         delete[] biomemap;
 148 }
 149
 150
 151 MapgenV7Params::MapgenV7Params()
 152 {
 153         spflags = MGV7_MOUNTAINS | MGV7_RIDGES;
 154
 155         np_terrain_base    = NoiseParams(4,    70,  v3f(600,  600,  600),  82341, 5, 0.6,  2.0);
 156         np_terrain_alt     = NoiseParams(4,    25,  v3f(600,  600,  600),  5934,  5, 0.6,  2.0);
 157         np_terrain_persist = NoiseParams(0.6,  0.1, v3f(2000, 2000, 2000), 539,   3, 0.6,  2.0);
 158         np_height_select   = NoiseParams(-8,   16,  v3f(500,  500,  500),  4213,  6, 0.7,  2.0);
 159         np_filler_depth    = NoiseParams(0,    1.2, v3f(150,  150,  150),  261,   3, 0.7,  2.0);
 160         np_mount_height    = NoiseParams(256,  112, v3f(1000, 1000, 1000), 72449, 3, 0.6,  2.0);
 161         np_ridge_uwater    = NoiseParams(0,    1,   v3f(1000, 1000, 1000), 85039, 5, 0.6,  2.0);
 162         np_mountain        = NoiseParams(-0.6, 1,   v3f(250,  350,  250),  5333,  5, 0.63, 2.0);
 163         np_ridge           = NoiseParams(0,    1,   v3f(100,  100,  100),  6467,  4, 0.75, 2.0);
 164         np_cave1           = NoiseParams(0,    12,  v3f(96,   96,   96),   52534, 4, 0.5,  2.0);
 165         np_cave2           = NoiseParams(0,    12,  v3f(96,   96,   96),   10325, 4, 0.5,  2.0);
 166 }
 167
 168
 169 void MapgenV7Params::readParams(const Settings *settings)
 170 {
 171         settings->getFlagStrNoEx("mgv7_spflags", spflags, flagdesc_mapgen_v7);
 172
 173         settings->getNoiseParams("mgv7_np_terrain_base",    np_terrain_base);
 174         settings->getNoiseParams("mgv7_np_terrain_alt",     np_terrain_alt);
 175         settings->getNoiseParams("mgv7_np_terrain_persist", np_terrain_persist);
 176         settings->getNoiseParams("mgv7_np_height_select",   np_height_select);
 177         settings->getNoiseParams("mgv7_np_filler_depth",    np_filler_depth);
 178         settings->getNoiseParams("mgv7_np_mount_height",    np_mount_height);
 179         settings->getNoiseParams("mgv7_np_ridge_uwater",    np_ridge_uwater);
 180         settings->getNoiseParams("mgv7_np_mountain",        np_mountain);
 181         settings->getNoiseParams("mgv7_np_ridge",           np_ridge);
 182         settings->getNoiseParams("mgv7_np_cave1",           np_cave1);
 183         settings->getNoiseParams("mgv7_np_cave2",           np_cave2);
 184 }
 185
 186
 187 void MapgenV7Params::writeParams(Settings *settings) const
 188 {
 189         settings->setFlagStr("mgv7_spflags", spflags, flagdesc_mapgen_v7, U32_MAX);
 190
 191         settings->setNoiseParams("mgv7_np_terrain_base",    np_terrain_base);
 192         settings->setNoiseParams("mgv7_np_terrain_alt",     np_terrain_alt);
 193         settings->setNoiseParams("mgv7_np_terrain_persist", np_terrain_persist);
 194         settings->setNoiseParams("mgv7_np_height_select",   np_height_select);
 195         settings->setNoiseParams("mgv7_np_filler_depth",    np_filler_depth);
 196         settings->setNoiseParams("mgv7_np_mount_height",    np_mount_height);
 197         settings->setNoiseParams("mgv7_np_ridge_uwater",    np_ridge_uwater);
 198         settings->setNoiseParams("mgv7_np_mountain",        np_mountain);
 199         settings->setNoiseParams("mgv7_np_ridge",           np_ridge);
 200         settings->setNoiseParams("mgv7_np_cave1",           np_cave1);
 201         settings->setNoiseParams("mgv7_np_cave2",           np_cave2);
 202 }
 203
 204
 205 ///////////////////////////////////////////////////////////////////////////////
 206
 207
 208 int MapgenV7::getSpawnLevelAtPoint(v2s16 p)
 209 {
 210         // Base terrain calculation
 211         s16 y = baseTerrainLevelAtPoint(p.X, p.Y);
 212
 213         // Ridge/river terrain calculation
 214         float width = 0.2;
 215         float uwatern = NoisePerlin2D(&noise_ridge_uwater->np, p.X, p.Y, seed) * 2;
 216         // if inside a river this is an unsuitable spawn point
 217         if (fabs(uwatern) <= width)
 218                 return MAX_MAP_GENERATION_LIMIT;
 219
 220         // Mountain terrain calculation
 221         int iters = 128;
 222         while (iters--) {
 223                 if (!getMountainTerrainAtPoint(p.X, y + 1, p.Y)) {  // Air, y is ground level
 224                         if (y <= water_level || y > water_level + 16)
 225                                 return MAX_MAP_GENERATION_LIMIT;  // Unsuitable spawn point
 226                         else
 227                                 return y;
 228                 }
 229                 y++;
 230         }
 231
 232         // Unsuitable spawn point, no ground surface found
 233         return MAX_MAP_GENERATION_LIMIT;
 234 }
 235
 236
 237 void MapgenV7::makeChunk(BlockMakeData *data)
 238 {
 239         // Pre-conditions
 240         assert(data->vmanip);
 241         assert(data->nodedef);
 242         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 243                 data->blockpos_requested.Y >= data->blockpos_min.Y &&
 244                 data->blockpos_requested.Z >= data->blockpos_min.Z);
 245         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 246                 data->blockpos_requested.Y <= data->blockpos_max.Y &&
 247                 data->blockpos_requested.Z <= data->blockpos_max.Z);
 248
 249         this->generating = true;
 250         this->vm   = data->vmanip;
 251         this->ndef = data->nodedef;
 252         //TimeTaker t("makeChunk");
 253
 254         v3s16 blockpos_min = data->blockpos_min;
 255         v3s16 blockpos_max = data->blockpos_max;
 256         node_min = blockpos_min * MAP_BLOCKSIZE;
 257         node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 258         full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
 259         full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 260
 261         blockseed = getBlockSeed2(full_node_min, seed);
 262
 263         // Make some noise
 264         calculateNoise();
 265
 266         // Generate base terrain, mountains, and ridges with initial heightmaps
 267         s16 stone_surface_max_y = generateTerrain();
 268
 269         // Create heightmap
 270         updateHeightmap(node_min, node_max);
 271
 272         // Create biomemap at heightmap surface
 273         bmgr->calcBiomes(csize.X, csize.Z, noise_heat->result,
 274                 noise_humidity->result, heightmap, biomemap);
 275
 276         // Actually place the biome-specific nodes
 277         MgStoneType stone_type = generateBiomes(noise_heat->result, noise_humidity->result);
 278
 279         if (flags & MG_CAVES)
 280                 generateCaves(stone_surface_max_y);
 281
 282         if ((flags & MG_DUNGEONS) && (stone_surface_max_y >= node_min.Y)) {
 283                 DungeonParams dp;
 284
 285                 dp.np_rarity  = nparams_dungeon_rarity;
 286                 dp.np_density = nparams_dungeon_density;
 287                 dp.np_wetness = nparams_dungeon_wetness;
 288                 dp.c_water    = c_water_source;
 289                 if (stone_type == STONE) {
 290                         dp.c_cobble = c_cobble;
 291                         dp.c_moss   = c_mossycobble;
 292                         dp.c_stair  = c_stair_cobble;
 293
 294                         dp.diagonal_dirs = false;
 295                         dp.mossratio     = 3.0;
 296                         dp.holesize      = v3s16(1, 2, 1);
 297                         dp.roomsize      = v3s16(0, 0, 0);
 298                         dp.notifytype    = GENNOTIFY_DUNGEON;
 299                 } else if (stone_type == DESERT_STONE) {
 300                         dp.c_cobble = c_desert_stone;
 301                         dp.c_moss   = c_desert_stone;
 302                         dp.c_stair  = c_desert_stone;
 303
 304                         dp.diagonal_dirs = true;
 305                         dp.mossratio     = 0.0;
 306                         dp.holesize      = v3s16(2, 3, 2);
 307                         dp.roomsize      = v3s16(2, 5, 2);
 308                         dp.notifytype    = GENNOTIFY_TEMPLE;
 309                 } else if (stone_type == SANDSTONE) {
 310                         dp.c_cobble = c_sandstonebrick;
 311                         dp.c_moss   = c_sandstonebrick;
 312                         dp.c_stair  = c_sandstonebrick;
 313
 314                         dp.diagonal_dirs = false;
 315                         dp.mossratio     = 0.0;
 316                         dp.holesize      = v3s16(2, 2, 2);
 317                         dp.roomsize      = v3s16(2, 0, 2);
 318                         dp.notifytype    = GENNOTIFY_DUNGEON;
 319                 }
 320
 321                 DungeonGen dgen(this, &dp);
 322                 dgen.generate(blockseed, full_node_min, full_node_max);
 323         }
 324
 325         // Generate the registered decorations
 326         if (flags & MG_DECORATIONS)
 327                 m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
 328
 329         // Generate the registered ores
 330         m_emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
 331
 332         // Sprinkle some dust on top after everything else was generated
 333         dustTopNodes();
 334
 335         //printf("makeChunk: %dms\n", t.stop());
 336
 337         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 338
 339         if (flags & MG_LIGHT)
 340                 calcLighting(node_min - v3s16(0, 1, 0), node_max + v3s16(0, 1, 0),
 341                         full_node_min, full_node_max);
 342
 343         //setLighting(node_min - v3s16(1, 0, 1) * MAP_BLOCKSIZE,
 344         //                      node_max + v3s16(1, 0, 1) * MAP_BLOCKSIZE, 0xFF);
 345
 346         this->generating = false;
 347 }
 348
 349
 350 void MapgenV7::calculateNoise()
 351 {
 352         //TimeTaker t("calculateNoise", NULL, PRECISION_MICRO);
 353         s16 x = node_min.X;
 354         s16 y = node_min.Y - 1;
 355         s16 z = node_min.Z;
 356
 357         noise_terrain_persist->perlinMap2D(x, z);
 358         float *persistmap = noise_terrain_persist->result;
 359
 360         noise_terrain_base->perlinMap2D(x, z, persistmap);
 361         noise_terrain_alt->perlinMap2D(x, z, persistmap);
 362         noise_height_select->perlinMap2D(x, z);
 363
 364         if ((spflags & MGV7_RIDGES) && node_max.Y >= water_level) {
 365                 noise_ridge->perlinMap3D(x, y, z);
 366                 noise_ridge_uwater->perlinMap2D(x, z);
 367         }
 368
 369         // Cave noises are calculated in generateCaves()
 370         // only if solid terrain is present in mapchunk
 371
 372         // Mountain noises are calculated in generateMountainTerrain()
 373         // only if solid terrain surface dips into mapchunk
 374
 375         noise_filler_depth->perlinMap2D(x, z);
 376         noise_heat->perlinMap2D(x, z);
 377         noise_humidity->perlinMap2D(x, z);
 378         noise_heat_blend->perlinMap2D(x, z);
 379         noise_humidity_blend->perlinMap2D(x, z);
 380
 381         for (s32 i = 0; i < csize.X * csize.Z; i++) {
 382                 noise_heat->result[i] += noise_heat_blend->result[i];
 383                 noise_humidity->result[i] += noise_humidity_blend->result[i];
 384         }
 385
 386         heatmap = noise_heat->result;
 387         humidmap = noise_humidity->result;
 388         //printf("calculateNoise: %dus\n", t.stop());
 389 }
 390
 391
 392 Biome *MapgenV7::getBiomeAtPoint(v3s16 p)
 393 {
 394         float heat = NoisePerlin2D(&noise_heat->np, p.X, p.Z, seed) +
 395                 NoisePerlin2D(&noise_heat_blend->np, p.X, p.Z, seed);
 396         float humidity = NoisePerlin2D(&noise_humidity->np, p.X, p.Z, seed) +
 397                 NoisePerlin2D(&noise_humidity_blend->np, p.X, p.Z, seed);
 398         s16 groundlevel = baseTerrainLevelAtPoint(p.X, p.Z);
 399
 400         return bmgr->getBiome(heat, humidity, groundlevel);
 401 }
 402
 403 //needs to be updated
 404 float MapgenV7::baseTerrainLevelAtPoint(s16 x, s16 z)
 405 {
 406         float hselect = NoisePerlin2D(&noise_height_select->np, x, z, seed);
 407         hselect = rangelim(hselect, 0.0, 1.0);
 408
 409         float persist = NoisePerlin2D(&noise_terrain_persist->np, x, z, seed);
 410
 411         noise_terrain_base->np.persist = persist;
 412         float height_base = NoisePerlin2D(&noise_terrain_base->np, x, z, seed);
 413
 414         noise_terrain_alt->np.persist = persist;
 415         float height_alt = NoisePerlin2D(&noise_terrain_alt->np, x, z, seed);
 416
 417         if (height_alt > height_base)
 418                 return height_alt;
 419
 420         return (height_base * hselect) + (height_alt * (1.0 - hselect));
 421 }
 422
 423
 424 float MapgenV7::baseTerrainLevelFromMap(int index)
 425 {
 426         float hselect     = rangelim(noise_height_select->result[index], 0.0, 1.0);
 427         float height_base = noise_terrain_base->result[index];
 428         float height_alt  = noise_terrain_alt->result[index];
 429
 430         if (height_alt > height_base)
 431                 return height_alt;
 432
 433         return (height_base * hselect) + (height_alt * (1.0 - hselect));
 434 }
 435
 436
 437 bool MapgenV7::getMountainTerrainAtPoint(s16 x, s16 y, s16 z)
 438 {
 439         float mnt_h_n = NoisePerlin2D(&noise_mount_height->np, x, z, seed);
 440         float density_gradient = -((float)y / mnt_h_n);
 441         float mnt_n = NoisePerlin3D(&noise_mountain->np, x, y, z, seed);
 442
 443         return mnt_n + density_gradient >= 0.0;
 444 }
 445
 446
 447 bool MapgenV7::getMountainTerrainFromMap(int idx_xyz, int idx_xz, s16 y)
 448 {
 449         float mounthn = noise_mount_height->result[idx_xz];
 450         float density_gradient = -((float)y / mounthn);
 451         float mountn = noise_mountain->result[idx_xyz];
 452
 453         return mountn + density_gradient >= 0.0;
 454 }
 455
 456
 457 int MapgenV7::generateTerrain()
 458 {
 459         s16 stone_surface_min_y;
 460         s16 stone_surface_max_y;
 461
 462         generateBaseTerrain(&stone_surface_min_y, &stone_surface_max_y);
 463
 464         if ((spflags & MGV7_MOUNTAINS) && stone_surface_min_y < node_max.Y)
 465                 stone_surface_max_y = generateMountainTerrain(stone_surface_max_y);
 466
 467         if (spflags & MGV7_RIDGES)
 468                 generateRidgeTerrain();
 469
 470         return stone_surface_max_y;
 471 }
 472
 473
 474 void MapgenV7::generateBaseTerrain(s16 *stone_surface_min_y, s16 *stone_surface_max_y)
 475 {
 476         MapNode n_air(CONTENT_AIR);
 477         MapNode n_stone(c_stone);
 478         MapNode n_water(c_water_source);
 479
 480         v3s16 em = vm->m_area.getExtent();
 481         s16 surface_min_y = MAX_MAP_GENERATION_LIMIT;
 482         s16 surface_max_y = -MAX_MAP_GENERATION_LIMIT;
 483         u32 index = 0;
 484
 485         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 486         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 487                 float surface_height = baseTerrainLevelFromMap(index);
 488                 s16 surface_y = (s16)surface_height;
 489
 490                 heightmap[index]       = surface_y;
 491                 ridge_heightmap[index] = surface_y;
 492
 493                 if (surface_y < surface_min_y)
 494                         surface_min_y = surface_y;
 495
 496                 if (surface_y > surface_max_y)
 497                         surface_max_y = surface_y;
 498
 499                 u32 vi = vm->m_area.index(x, node_min.Y - 1, z);
 500                 for (s16 y = node_min.Y - 1; y <= node_max.Y + 1; y++) {
 501                         if (vm->m_data[vi].getContent() == CONTENT_IGNORE) {
 502                                 if (y <= surface_y)
 503                                         vm->m_data[vi] = n_stone;
 504                                 else if (y <= water_level)
 505                                         vm->m_data[vi] = n_water;
 506                                 else
 507                                         vm->m_data[vi] = n_air;
 508                         }
 509                         vm->m_area.add_y(em, vi, 1);
 510                 }
 511         }
 512
 513         *stone_surface_min_y = surface_min_y;
 514         *stone_surface_max_y = surface_max_y;
 515 }
 516
 517
 518 int MapgenV7::generateMountainTerrain(s16 ymax)
 519 {
 520         noise_mountain->perlinMap3D(node_min.X, node_min.Y - 1, node_min.Z);
 521         noise_mount_height->perlinMap2D(node_min.X, node_min.Z);
 522
 523         MapNode n_stone(c_stone);
 524         u32 j = 0;
 525
 526         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 527         for (s16 y = node_min.Y - 1; y <= node_max.Y + 1; y++) {
 528                 u32 vi = vm->m_area.index(node_min.X, y, z);
 529                 for (s16 x = node_min.X; x <= node_max.X; x++) {
 530                         int index = (z - node_min.Z) * csize.X + (x - node_min.X);
 531                         content_t c = vm->m_data[vi].getContent();
 532
 533                         if (getMountainTerrainFromMap(j, index, y)
 534                                         && (c == CONTENT_AIR || c == c_water_source)) {
 535                                 vm->m_data[vi] = n_stone;
 536                                 if (y > ymax)
 537                                         ymax = y;
 538                         }
 539
 540                         vi++;
 541                         j++;
 542                 }
 543         }
 544
 545         return ymax;
 546 }
 547
 548
 549 void MapgenV7::generateRidgeTerrain()
 550 {
 551         if (node_max.Y < water_level)
 552                 return;
 553
 554         MapNode n_water(c_water_source);
 555         MapNode n_air(CONTENT_AIR);
 556         u32 index = 0;
 557         float width = 0.2;
 558
 559         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 560         for (s16 y = node_min.Y - 1; y <= node_max.Y + 1; y++) {
 561                 u32 vi = vm->m_area.index(node_min.X, y, z);
 562                 for (s16 x = node_min.X; x <= node_max.X; x++, index++, vi++) {
 563                         int j = (z - node_min.Z) * csize.X + (x - node_min.X);
 564
 565                         if (heightmap[j] < water_level - 16)
 566                                 continue;
 567
 568                         float uwatern = noise_ridge_uwater->result[j] * 2;
 569                         if (fabs(uwatern) > width)
 570                                 continue;
 571
 572                         float altitude = y - water_level;
 573                         float height_mod = (altitude + 17) / 2.5;
 574                         float width_mod  = width - fabs(uwatern);
 575                         float nridge = noise_ridge->result[index] * MYMAX(altitude, 0) / 7.0;
 576
 577                         if (nridge + width_mod * height_mod < 0.6)
 578                                 continue;
 579
 580                         if (y < ridge_heightmap[j])
 581                                 ridge_heightmap[j] = y - 1;
 582
 583                         vm->m_data[vi] = (y > water_level) ? n_air : n_water;
 584                 }
 585         }
 586 }
 587
 588
 589 MgStoneType MapgenV7::generateBiomes(float *heat_map, float *humidity_map)
 590 {
 591         v3s16 em = vm->m_area.getExtent();
 592         u32 index = 0;
 593         MgStoneType stone_type = STONE;
 594
 595         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 596         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 597                 Biome *biome = NULL;
 598                 u16 depth_top = 0;
 599                 u16 base_filler = 0;
 600                 u16 depth_water_top = 0;
 601                 u32 vi = vm->m_area.index(x, node_max.Y, z);
 602
 603                 // Check node at base of mapchunk above, either a node of a previously
 604                 // generated mapchunk or if not, a node of overgenerated base terrain.
 605                 content_t c_above = vm->m_data[vi + em.X].getContent();
 606                 bool air_above = c_above == CONTENT_AIR;
 607                 bool water_above = c_above == c_water_source;
 608
 609                 // If there is air or water above enable top/filler placement, otherwise force
 610                 // nplaced to stone level by setting a number exceeding any possible filler depth.
 611                 u16 nplaced = (air_above || water_above) ? 0 : U16_MAX;
 612
 613                 for (s16 y = node_max.Y; y >= node_min.Y; y--) {
 614                         content_t c = vm->m_data[vi].getContent();
 615
 616                         // Biome is recalculated each time an upper surface is detected while
 617                         // working down a column. The selected biome then remains in effect for
 618                         // all nodes below until the next surface and biome recalculation.
 619                         // Biome is recalculated:
 620                         // 1. At the surface of stone below air or water.
 621                         // 2. At the surface of water below air.
 622                         // 3. When stone or water is detected but biome has not yet been calculated.
 623                         if ((c == c_stone && (air_above || water_above || !biome)) ||
 624                                         (c == c_water_source && (air_above || !biome))) {
 625                                 biome = bmgr->getBiome(heat_map[index], humidity_map[index], y);
 626                                 depth_top = biome->depth_top;
 627                                 base_filler = MYMAX(depth_top + biome->depth_filler
 628                                                 + noise_filler_depth->result[index], 0);
 629                                 depth_water_top = biome->depth_water_top;
 630
 631                                 // Detect stone type for dungeons during every biome calculation.
 632                                 // This is more efficient than detecting per-node and will not
 633                                 // miss any desert stone or sandstone biomes.
 634                                 if (biome->c_stone == c_desert_stone)
 635                                         stone_type = DESERT_STONE;
 636                                 else if (biome->c_stone == c_sandstone)
 637                                         stone_type = SANDSTONE;
 638                         }
 639
 640                         if (c == c_stone) {
 641                                 content_t c_below = vm->m_data[vi - em.X].getContent();
 642
 643                                 // If the node below isn't solid, make this node stone, so that
 644                                 // any top/filler nodes above are structurally supported.
 645                                 // This is done by aborting the cycle of top/filler placement
 646                                 // immediately by forcing nplaced to stone level.
 647                                 if (c_below == CONTENT_AIR || c_below == c_water_source)
 648                                         nplaced = U16_MAX;
 649
 650                                 if (nplaced < depth_top) {
 651                                         vm->m_data[vi] = MapNode(biome->c_top);
 652                                         nplaced++;
 653                                 } else if (nplaced < base_filler) {
 654                                         vm->m_data[vi] = MapNode(biome->c_filler);
 655                                         nplaced++;
 656                                 } else {
 657                                         vm->m_data[vi] = MapNode(biome->c_stone);
 658                                 }
 659
 660                                 air_above = false;
 661                                 water_above = false;
 662                         } else if (c == c_water_source) {
 663                                 vm->m_data[vi] = MapNode((y > (s32)(water_level - depth_water_top)) ?
 664                                                 biome->c_water_top : biome->c_water);
 665                                 nplaced = 0;  // Enable top/filler placement for next surface
 666                                 air_above = false;
 667                                 water_above = true;
 668                         } else if (c == CONTENT_AIR) {
 669                                 nplaced = 0;  // Enable top/filler placement for next surface
 670                                 air_above = true;
 671                                 water_above = false;
 672                         } else {  // Possible various nodes overgenerated from neighbouring mapchunks
 673                                 nplaced = U16_MAX;  // Disable top/filler placement
 674                                 air_above = false;
 675                                 water_above = false;
 676                         }
 677
 678                         vm->m_area.add_y(em, vi, -1);
 679                 }
 680         }
 681
 682         return stone_type;
 683 }
 684
 685
 686 void MapgenV7::dustTopNodes()
 687 {
 688         if (node_max.Y < water_level)
 689                 return;
 690
 691         v3s16 em = vm->m_area.getExtent();
 692         u32 index = 0;
 693
 694         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 695         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 696                 Biome *biome = (Biome *)bmgr->getRaw(biomemap[index]);
 697
 698                 if (biome->c_dust == CONTENT_IGNORE)
 699                         continue;
 700
 701                 u32 vi = vm->m_area.index(x, full_node_max.Y, z);
 702                 content_t c_full_max = vm->m_data[vi].getContent();
 703                 s16 y_start;
 704
 705                 if (c_full_max == CONTENT_AIR) {
 706                         y_start = full_node_max.Y - 1;
 707                 } else if (c_full_max == CONTENT_IGNORE) {
 708                         vi = vm->m_area.index(x, node_max.Y + 1, z);
 709                         content_t c_max = vm->m_data[vi].getContent();
 710
 711                         if (c_max == CONTENT_AIR)
 712                                 y_start = node_max.Y;
 713                         else
 714                                 continue;
 715                 } else {
 716                         continue;
 717                 }
 718
 719                 vi = vm->m_area.index(x, y_start, z);
 720                 for (s16 y = y_start; y >= node_min.Y - 1; y--) {
 721                         if (vm->m_data[vi].getContent() != CONTENT_AIR)
 722                                 break;
 723
 724                         vm->m_area.add_y(em, vi, -1);
 725                 }
 726
 727                 content_t c = vm->m_data[vi].getContent();
 728                 if (!ndef->get(c).buildable_to && c != CONTENT_IGNORE && c != biome->c_dust) {
 729                         vm->m_area.add_y(em, vi, 1);
 730                         vm->m_data[vi] = MapNode(biome->c_dust);
 731                 }
 732         }
 733 }
 734
 735
 736 void MapgenV7::generateCaves(s16 max_stone_y)
 737 {
 738         if (max_stone_y < node_min.Y)
 739                 return;
 740
 741         noise_cave1->perlinMap3D(node_min.X, node_min.Y - 1, node_min.Z);
 742         noise_cave2->perlinMap3D(node_min.X, node_min.Y - 1, node_min.Z);
 743
 744         v3s16 em = vm->m_area.getExtent();
 745         u32 index2d = 0;
 746
 747         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 748         for (s16 x = node_min.X; x <= node_max.X; x++, index2d++) {
 749                 bool column_is_open = false;  // Is column open to overground
 750                 bool is_tunnel = false;  // Is tunnel or tunnel floor
 751                 // Indexes at column top (node_max.Y)
 752                 u32 vi = vm->m_area.index(x, node_max.Y, z);
 753                 u32 index3d = (z - node_min.Z) * zstride_1d + csize.Y * ystride +
 754                         (x - node_min.X);
 755                 // Biome of column
 756                 Biome *biome = (Biome *)bmgr->getRaw(biomemap[index2d]);
 757
 758                 // Don't excavate the overgenerated stone at node_max.Y + 1,
 759                 // this creates a 'roof' over the tunnel, preventing light in
 760                 // tunnels at mapchunk borders when generating mapchunks upwards.
 761                 // This 'roof' is removed when the mapchunk above is generated.
 762                 for (s16 y = node_max.Y; y >= node_min.Y - 1; y--,
 763                                 index3d -= ystride,
 764                                 vm->m_area.add_y(em, vi, -1)) {
 765
 766                         content_t c = vm->m_data[vi].getContent();
 767                         if (c == CONTENT_AIR || c == biome->c_water_top ||
 768                                         c == biome->c_water) {
 769                                 column_is_open = true;
 770                                 continue;
 771                         }
 772                         // Ground
 773                         float d1 = contour(noise_cave1->result[index3d]);
 774                         float d2 = contour(noise_cave2->result[index3d]);
 775
 776                         if (d1 * d2 > 0.3f && ndef->get(c).is_ground_content) {
 777                                 // In tunnel and ground content, excavate
 778                                 vm->m_data[vi] = MapNode(CONTENT_AIR);
 779                                 is_tunnel = true;
 780                         } else {
 781                                 // Not in tunnel or not ground content
 782                                 if (is_tunnel && column_is_open &&
 783                                                 (c == biome->c_filler || c == biome->c_stone))
 784                                         // Tunnel entrance floor
 785                                         vm->m_data[vi] = MapNode(biome->c_top);
 786
 787                                 column_is_open = false;
 788                                 is_tunnel = false;
 789                         }
 790                 }
 791         }
 792
 793         if (node_min.Y >= water_level)
 794                 return;
 795
 796         PseudoRandom ps(blockseed + 21343);
 797         u32 bruises_count = ps.range(0, 2);
 798         for (u32 i = 0; i < bruises_count; i++) {
 799                 CaveV7 cave(this, &ps);
 800                 cave.makeCave(node_min, node_max, max_stone_y);
 801         }
 802 }
 803
 804
 805 ///////////////////////////////////////////////////////////////
 806
 807
 808 #if 0
 809 void MapgenV7::carveRivers() {
 810         MapNode n_air(CONTENT_AIR), n_water_source(c_water_source);
 811         MapNode n_stone(c_stone);
 812         u32 index = 0;
 813
 814         int river_depth = 4;
 815
 816         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 817         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 818                 float terrain_mod  = noise_terrain_mod->result[index];
 819                 NoiseParams *np = noise_terrain_river->np;
 820                 np.persist = noise_terrain_persist->result[index];
 821                 float terrain_river = NoisePerlin2DNoTxfm(np, x, z, seed);
 822                 float height = terrain_river * (1 - abs(terrain_mod)) *
 823                                                 noise_terrain_river->np.scale;
 824                 height = log(height * height); //log(h^3) is pretty interesting for terrain
 825
 826                 s16 y = heightmap[index];
 827                 if (height < 1.0 && y > river_depth &&
 828                         y - river_depth >= node_min.Y && y <= node_max.Y) {
 829
 830                         for (s16 ry = y; ry != y - river_depth; ry--) {
 831                                 u32 vi = vm->m_area.index(x, ry, z);
 832                                 vm->m_data[vi] = n_air;
 833                         }
 834
 835                         u32 vi = vm->m_area.index(x, y - river_depth, z);
 836                         vm->m_data[vi] = n_water_source;
 837                 }
 838         }
 839 }
 840 #endif
 841
 842
 843 #if 0
 844 void MapgenV7::addTopNodes()
 845 {
 846         v3s16 em = vm->m_area.getExtent();
 847         s16 ntopnodes;
 848         u32 index = 0;
 849
 850         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 851         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 852                 Biome *biome = bmgr->biomes[biomemap[index]];
 853
 854                 //////////////////// First, add top nodes below the ridge
 855                 s16 y = ridge_heightmap[index];
 856
 857                 // This cutoff is good enough, but not perfect.
 858                 // It will cut off potentially placed top nodes at chunk boundaries
 859                 if (y < node_min.Y)
 860                         continue;
 861                 if (y > node_max.Y) {
 862                         y = node_max.Y; // Let's see if we can still go downward anyway
 863                         u32 vi = vm->m_area.index(x, y, z);
 864                         content_t c = vm->m_data[vi].getContent();
 865                         if (ndef->get(c).walkable)
 866                                 continue;
 867                 }
 868
 869                 // N.B.  It is necessary to search downward since ridge_heightmap[i]
 870                 // might not be the actual height, just the lowest part in the chunk
 871                 // where a ridge had been carved
 872                 u32 i = vm->m_area.index(x, y, z);
 873                 for (; y >= node_min.Y; y--) {
 874                         content_t c = vm->m_data[i].getContent();
 875                         if (ndef->get(c).walkable)
 876                                 break;
 877                         vm->m_area.add_y(em, i, -1);
 878                 }
 879
 880                 if (y != node_min.Y - 1 && y >= water_level) {
 881                         ridge_heightmap[index] = y; //update ridgeheight
 882                         ntopnodes = biome->top_depth;
 883                         for (; y <= node_max.Y && ntopnodes; y++) {
 884                                 ntopnodes--;
 885                                 vm->m_data[i] = MapNode(biome->c_top);
 886                                 vm->m_area.add_y(em, i, 1);
 887                         }
 888                         // If dirt, grow grass on it.
 889                         if (y > water_level - 10 &&
 890                                 vm->m_data[i].getContent() == CONTENT_AIR) {
 891                                 vm->m_area.add_y(em, i, -1);
 892                                 if (vm->m_data[i].getContent() == c_dirt)
 893                                         vm->m_data[i] = MapNode(c_dirt_with_grass);
 894                         }
 895                 }
 896
 897                 //////////////////// Now, add top nodes on top of the ridge
 898                 y = heightmap[index];
 899                 if (y > node_max.Y) {
 900                         y = node_max.Y; // Let's see if we can still go downward anyway
 901                         u32 vi = vm->m_area.index(x, y, z);
 902                         content_t c = vm->m_data[vi].getContent();
 903                         if (ndef->get(c).walkable)
 904                                 continue;
 905                 }
 906
 907                 i = vm->m_area.index(x, y, z);
 908                 for (; y >= node_min.Y; y--) {
 909                         content_t c = vm->m_data[i].getContent();
 910                         if (ndef->get(c).walkable)
 911                                 break;
 912                         vm->m_area.add_y(em, i, -1);
 913                 }
 914
 915                 if (y != node_min.Y - 1) {
 916                         ntopnodes = biome->top_depth;
 917                         // Let's see if we've already added it...
 918                         if (y == ridge_heightmap[index] + ntopnodes - 1)
 919                                 continue;
 920
 921                         for (; y <= node_max.Y && ntopnodes; y++) {
 922                                 ntopnodes--;
 923                                 vm->m_data[i] = MapNode(biome->c_top);
 924                                 vm->m_area.add_y(em, i, 1);
 925                         }
 926                         // If dirt, grow grass on it.
 927                         if (y > water_level - 10 &&
 928                                 vm->m_data[i].getContent() == CONTENT_AIR) {
 929                                 vm->m_area.add_y(em, i, -1);
 930                                 if (vm->m_data[i].getContent() == c_dirt)
 931                                         vm->m_data[i] = MapNode(c_dirt_with_grass);
 932                         }
 933                 }
 934         }
 935 }
 936 #endif