src/mapgen_v7.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2013 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
   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 "content_mapnode.h" // For content_mapnode_get_new_name
  31 #include "voxelalgorithms.h"
  32 #include "profiler.h"
  33 #include "settings.h" // For g_settings
  34 #include "main.h" // For g_profiler
  35 #include "emerge.h"
  36 #include "dungeongen.h"
  37 #include "cavegen.h"
  38 #include "treegen.h"
  39 #include "biome.h"
  40 #include "mapgen_v7.h"
  41
  42
  43 /////////////////// Mapgen V7 perlin noise default values
  44 NoiseParams nparams_v7_def_terrain_base =
  45         {0, 80.0, v3f(250.0, 250.0, 250.0), 82341, 5, 0.6};
  46 NoiseParams nparams_v7_def_terrain_alt =
  47         {0, 20.0, v3f(250.0, 250.0, 250.0), 5934, 5, 0.6};
  48 NoiseParams nparams_v7_def_terrain_mod =
  49         {0, 1.0, v3f(350.0, 350.0, 350.0), 85039, 5, 0.6};
  50 NoiseParams nparams_v7_def_terrain_persist =
  51         {0, 1.0, v3f(500.0, 500.0, 500.0), 539, 3, 0.6};
  52 NoiseParams nparams_v7_def_height_select =
  53         {0.5, 0.5, v3f(250.0, 250.0, 250.0), 4213, 5, 0.69};
  54 NoiseParams nparams_v7_def_ridge =
  55         {0.5, 1.0, v3f(100.0, 100.0, 100.0), 6467, 4, 0.75};
  56 /*
  57 NoiseParams nparams_v6_def_beach =
  58         {0.0, 1.0, v3f(250.0, 250.0, 250.0), 59420, 3, 0.50};
  59 NoiseParams nparams_v6_def_cave =
  60         {6.0, 6.0, v3f(250.0, 250.0, 250.0), 34329, 3, 0.50};
  61 NoiseParams nparams_v6_def_humidity =
  62         {0.5, 0.5, v3f(500.0, 500.0, 500.0), 72384, 4, 0.66};
  63 NoiseParams nparams_v6_def_trees =
  64         {0.0, 1.0, v3f(125.0, 125.0, 125.0), 2, 4, 0.66};
  65 NoiseParams nparams_v6_def_apple_trees =
  66         {0.0, 1.0, v3f(100.0, 100.0, 100.0), 342902, 3, 0.45};
  67 */
  68 ///////////////////////////////////////////////////////////////////////////////
  69
  70
  71 MapgenV7::MapgenV7(int mapgenid, MapgenV7Params *params, EmergeManager *emerge) {
  72         this->generating  = false;
  73         this->id     = mapgenid;
  74         this->emerge = emerge;
  75         this->bmgr   = emerge->biomedef;
  76
  77         this->seed     = (int)params->seed;
  78         this->water_level = params->water_level;
  79         this->flags   = params->flags;
  80         this->csize   = v3s16(1, 1, 1) * params->chunksize * MAP_BLOCKSIZE;
  81         this->ystride = csize.X; //////fix this
  82
  83         this->biomemap  = new u8[csize.X * csize.Z];
  84         this->heightmap = new s16[csize.X * csize.Z];
  85         this->ridge_heightmap = new s16[csize.X * csize.Z];
  86
  87         // Terrain noise
  88         noise_terrain_base    = new Noise(&params->np_terrain_base,    seed, csize.X, csize.Z);
  89         noise_terrain_alt     = new Noise(&params->np_terrain_alt,     seed, csize.X, csize.Z);
  90         noise_terrain_mod     = new Noise(&params->np_terrain_mod,     seed, csize.X, csize.Z);
  91         noise_terrain_persist = new Noise(&params->np_terrain_persist, seed, csize.X, csize.Z);
  92         noise_height_select   = new Noise(&params->np_height_select,   seed, csize.X, csize.Z);
  93         noise_ridge           = new Noise(&params->np_ridge, seed, csize.X, csize.Y, csize.Z);
  94
  95         // Biome noise
  96         noise_heat     = new Noise(bmgr->np_heat,     seed, csize.X, csize.Z);
  97         noise_humidity = new Noise(bmgr->np_humidity, seed, csize.X, csize.Z);
  98 }
  99
 100
 101 MapgenV7::~MapgenV7() {
 102         delete noise_terrain_base;
 103         delete noise_terrain_mod;
 104         delete noise_terrain_persist;
 105         delete noise_height_select;
 106         delete noise_terrain_alt;
 107         delete noise_ridge;
 108         delete noise_heat;
 109         delete noise_humidity;
 110
 111         delete[] ridge_heightmap;
 112         delete[] heightmap;
 113         delete[] biomemap;
 114 }
 115
 116
 117 int MapgenV7::getGroundLevelAtPoint(v2s16 p) {
 118         s16 groundlevel = baseTerrainLevelAtPoint(p.X, p.Y);
 119         float heat      = NoisePerlin2D(bmgr->np_heat, p.X, p.Y, seed);
 120         float humidity  = NoisePerlin2D(bmgr->np_humidity, p.X, p.Y, seed);
 121         Biome *b = bmgr->getBiome(heat, humidity, groundlevel);
 122
 123         s16 y = groundlevel;
 124         if (y > water_level) {
 125                 int iters = 1024; // don't even bother iterating more than 1024 times..
 126                 while (iters--) {
 127                         float ridgenoise = NoisePerlin3D(noise_ridge->np, p.X, y, p.Y, seed);
 128                         if (ridgenoise * (float)(y * y) < 15.0)
 129                                 break;
 130                         y--;
 131                 }
 132         }
 133
 134         return y + b->top_depth;
 135 }
 136
 137
 138 void MapgenV7::makeChunk(BlockMakeData *data) {
 139         assert(data->vmanip);
 140         assert(data->nodedef);
 141         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 142                    data->blockpos_requested.Y >= data->blockpos_min.Y &&
 143                    data->blockpos_requested.Z >= data->blockpos_min.Z);
 144         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 145                    data->blockpos_requested.Y <= data->blockpos_max.Y &&
 146                    data->blockpos_requested.Z <= data->blockpos_max.Z);
 147
 148         this->generating = true;
 149         this->vm   = data->vmanip;
 150         this->ndef = data->nodedef;
 151         //TimeTaker t("makeChunk");
 152
 153         v3s16 blockpos_min = data->blockpos_min;
 154         v3s16 blockpos_max = data->blockpos_max;
 155         v3s16 blockpos_full_min = blockpos_min - v3s16(1, 1, 1);
 156         v3s16 blockpos_full_max = blockpos_max + v3s16(1, 1, 1);
 157         node_min = blockpos_min * MAP_BLOCKSIZE;
 158         node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 159         full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
 160         full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 161
 162         blockseed = emerge->getBlockSeed(full_node_min);  //////use getBlockSeed2()!
 163
 164         // Make some noise
 165         calculateNoise();
 166
 167         // Calculate height map
 168         s16 stone_surface_max_y = calcHeightMap();
 169
 170         // Calculate biomes
 171         BiomeNoiseInput binput;
 172         binput.mapsize       = v2s16(csize.X, csize.Z);
 173         binput.heat_map      = noise_heat->result;
 174         binput.humidity_map  = noise_humidity->result;
 175         binput.height_map    = heightmap;
 176         bmgr->calcBiomes(&binput, biomemap);
 177
 178         c_stone           = ndef->getId("mapgen_stone");
 179         c_dirt            = ndef->getId("mapgen_dirt");
 180         c_dirt_with_grass = ndef->getId("mapgen_dirt_with_grass");
 181         c_sand            = ndef->getId("mapgen_sand");
 182         c_water_source    = ndef->getId("mapgen_water_source");
 183         c_lava_source     = ndef->getId("mapgen_lava_source");
 184
 185         generateTerrain();
 186         carveRidges();
 187
 188         generateCaves(stone_surface_max_y);
 189         addTopNodes();
 190
 191         if (flags & MG_DUNGEONS) {
 192                 DungeonGen dgen(ndef, data->seed, water_level);
 193                 dgen.generate(vm, blockseed, full_node_min, full_node_max);
 194         }
 195
 196         for (size_t i = 0; i != emerge->ores.size(); i++) {
 197                 Ore *ore = emerge->ores[i];
 198                 ore->placeOre(this, blockseed + i, node_min, node_max);
 199         }
 200
 201         //printf("makeChunk: %dms\n", t.stop());
 202
 203         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 204
 205         calcLighting(node_min - v3s16(1, 0, 1) * MAP_BLOCKSIZE,
 206                                  node_max + v3s16(1, 0, 1) * MAP_BLOCKSIZE);
 207         //setLighting(node_min - v3s16(1, 0, 1) * MAP_BLOCKSIZE,
 208         //                      node_max + v3s16(1, 0, 1) * MAP_BLOCKSIZE, 0xFF);
 209
 210         this->generating = false;
 211 }
 212
 213
 214 void MapgenV7::calculateNoise() {
 215         //TimeTaker t("calculateNoise", NULL, PRECISION_MICRO);
 216         int x = node_min.X;
 217         int y = node_min.Y;
 218         int z = node_min.Z;
 219
 220         noise_terrain_mod->perlinMap2D(x, z);
 221
 222         noise_height_select->perlinMap2D(x, z);
 223         noise_height_select->transformNoiseMap();
 224
 225         noise_terrain_persist->perlinMap2D(x, z);
 226         float *persistmap = noise_terrain_persist->result;
 227         for (int i = 0; i != csize.X * csize.Z; i++)
 228                 persistmap[i] = abs(persistmap[i]);
 229
 230         noise_terrain_base->perlinMap2DModulated(x, z, persistmap);
 231         noise_terrain_base->transformNoiseMap();
 232
 233         noise_terrain_alt->perlinMap2DModulated(x, z, persistmap);
 234         noise_terrain_alt->transformNoiseMap();
 235
 236         noise_ridge->perlinMap3D(x, y, z);
 237
 238         noise_heat->perlinMap2D(x, z);
 239
 240         noise_humidity->perlinMap2D(x, z);
 241
 242         //printf("calculateNoise: %dus\n", t.stop());
 243 }
 244
 245
 246 Biome *MapgenV7::getBiomeAtPoint(v3s16 p) {
 247         float heat      = NoisePerlin2D(bmgr->np_heat, p.X, p.Z, seed);
 248         float humidity  = NoisePerlin2D(bmgr->np_humidity, p.X, p.Z, seed);
 249         s16 groundlevel = baseTerrainLevelAtPoint(p.X, p.Z);
 250
 251         return bmgr->getBiome(heat, humidity, groundlevel);
 252 }
 253
 254
 255 float MapgenV7::baseTerrainLevelAtPoint(int x, int z) {
 256         float terrain_mod = NoisePerlin2DNoTxfm(noise_terrain_mod->np, x, z, seed);
 257         float hselect     = NoisePerlin2D(noise_height_select->np, x, z, seed);
 258         float persist     = abs(NoisePerlin2DNoTxfm(noise_terrain_persist->np, x, z, seed));
 259
 260         noise_terrain_base->np->persist = persist;
 261         float terrain_base = NoisePerlin2D(noise_terrain_base->np, x, z, seed);
 262         float height_base  = terrain_base * terrain_mod;
 263
 264         noise_terrain_alt->np->persist = persist;
 265         float height_alt = NoisePerlin2D(noise_terrain_alt->np, x, z, seed);
 266
 267         return (height_base * hselect) + (height_alt * (1.0 - hselect));
 268 }
 269
 270
 271 float MapgenV7::baseTerrainLevelFromMap(int index) {
 272         float terrain_mod  = noise_terrain_mod->result[index];
 273         float hselect      = noise_height_select->result[index];
 274         float terrain_base = noise_terrain_base->result[index];
 275         float height_base  = terrain_base * terrain_mod;
 276         float height_alt   = noise_terrain_alt->result[index];
 277
 278         return (height_base * hselect) + (height_alt * (1.0 - hselect));
 279 }
 280
 281
 282 #if 0
 283 // Crap code to test log rivers as a proof-of-concept.  Didn't work out too well.
 284 void MapgenV7::carveRivers() {
 285         MapNode n_air(CONTENT_AIR), n_water_source(c_water_source);
 286         MapNode n_stone(c_stone);
 287         u32 index = 0;
 288
 289         int river_depth = 4;
 290
 291         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 292         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 293                 float terrain_mod  = noise_terrain_mod->result[index];
 294                 NoiseParams *np = noise_terrain_river->np;
 295                 np->persist = noise_terrain_persist->result[index];
 296                 float terrain_river = NoisePerlin2DNoTxfm(np, x, z, seed);
 297                 float height = terrain_river * (1 - abs(terrain_mod)) *
 298                                                 noise_terrain_river->np->scale;
 299                 height = log(height * height); //log(h^3) is pretty interesting for terrain
 300
 301                 s16 y = heightmap[index];
 302                 if (height < 1.0 && y > river_depth &&
 303                         y - river_depth >= node_min.Y && y <= node_max.Y) {
 304
 305                         for (s16 ry = y; ry != y - river_depth; ry--) {
 306                                 u32 vi = vm->m_area.index(x, ry, z);
 307                                 vm->m_data[vi] = n_air;
 308                         }
 309
 310                         u32 vi = vm->m_area.index(x, y - river_depth, z);
 311                         vm->m_data[vi] = n_water_source;
 312                 }
 313         }
 314 }
 315 #endif
 316
 317
 318 int MapgenV7::calcHeightMap() {
 319         int stone_surface_max_y = -MAP_GENERATION_LIMIT;
 320         u32 index = 0;
 321
 322         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 323         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 324                 float surface_height = baseTerrainLevelFromMap(index);
 325                 s16 surface_y = (s16)surface_height;
 326
 327                 heightmap[index]       = surface_y;
 328                 ridge_heightmap[index] = surface_y;
 329
 330                 if (surface_y > stone_surface_max_y)
 331                         stone_surface_max_y = surface_y;
 332         }
 333
 334         return stone_surface_max_y;
 335 }
 336
 337
 338 void MapgenV7::generateTerrain() {
 339         MapNode n_air(CONTENT_AIR), n_water_source(c_water_source);
 340         MapNode n_stone(c_stone);
 341
 342         v3s16 em = vm->m_area.getExtent();
 343         u32 index = 0;
 344
 345         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 346         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 347                 s16 surface_y = heightmap[index];
 348                 Biome *biome = bmgr->biomes[biomemap[index]];
 349
 350                 u32 i = vm->m_area.index(x, node_min.Y, z);
 351                 for (s16 y = node_min.Y; y <= node_max.Y; y++) {
 352                         if (vm->m_data[i].getContent() == CONTENT_IGNORE) {
 353                                 if (y <= surface_y) {
 354                                         vm->m_data[i] = (y > water_level + biome->filler_height) ?
 355                                                 MapNode(biome->c_filler) : n_stone;
 356                                 } else if (y <= water_level) {
 357                                         vm->m_data[i] = n_water_source;
 358                                 } else {
 359                                         vm->m_data[i] = n_air;
 360                                 }
 361                         }
 362                         vm->m_area.add_y(em, i, 1);
 363                 }
 364         }
 365 }
 366
 367
 368 void MapgenV7::carveRidges() {
 369         if (node_max.Y <= water_level)
 370                 return;
 371
 372         MapNode n_air(CONTENT_AIR);
 373         u32 index = 0;
 374
 375         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 376         for (s16 y = node_min.Y; y <= node_max.Y; y++) {
 377                 u32 vi = vm->m_area.index(node_min.X, y, z);
 378                 for (s16 x = node_min.X; x <= node_max.X; x++, index++, vi++) {
 379                         // Removing this check will create huge underwater caverns,
 380                         // which are interesting but not desirable for gameplay
 381                         if (y <= water_level)
 382                                 continue;
 383
 384                         if (noise_ridge->result[index] * (float)(y * y) < 15.0)
 385                                 continue;
 386
 387                         int j = (z - node_min.Z) * csize.Z + (x - node_min.X); //////obviously just temporary
 388                         if (y < ridge_heightmap[j])
 389                                 ridge_heightmap[j] = y - 1;
 390
 391                         vm->m_data[vi] = n_air;
 392                 }
 393         }
 394 }
 395
 396 /*
 397 void MapgenV7::testBiomes() {
 398         u32 index = 0;
 399
 400         for (s16 z = node_min.Z; z <= node_min.Z; z++)
 401         for (s16 x = node_min.X; x <= node_min.X; x++) {;
 402                 Biome *b = bmgr->getBiome(heat, humidity, 0);
 403         }
 404         // make an 80x80 grid with axes heat/humidity as a voroni diagram for biomes
 405         // clear out y space for it first with air
 406         // use absolute positioning, each chunk will be a +1 height
 407 }*/
 408
 409
 410 void MapgenV7::addTopNodes() {
 411         v3s16 em = vm->m_area.getExtent();
 412         s16 ntopnodes;
 413         u32 index = 0;
 414
 415         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 416         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 417                 Biome *biome = bmgr->biomes[biomemap[index]];
 418
 419                 //////////////////// First, add top nodes below the ridge
 420                 s16 y = ridge_heightmap[index];
 421
 422                 // This cutoff is good enough, but not perfect.
 423                 // It will cut off potentially placed top nodes at chunk boundaries
 424                 if (y < node_min.Y)
 425                         continue;
 426                 if (y > node_max.Y) {
 427                         y = node_max.Y; // Let's see if we can still go downward anyway
 428                         u32 vi = vm->m_area.index(x, y, z);
 429                         content_t c = vm->m_data[vi].getContent();
 430                         if (ndef->get(c).walkable)
 431                                 continue;
 432                 }
 433
 434                 // N.B.  It is necessary to search downward since range_heightmap[i]
 435                 // might not be the actual height, just the lowest part in the chunk
 436                 // where a ridge had been carved
 437                 u32 i = vm->m_area.index(x, y, z);
 438                 for (; y >= node_min.Y; y--) {
 439                         content_t c = vm->m_data[i].getContent();
 440                         if (ndef->get(c).walkable)
 441                                 break;
 442                         vm->m_area.add_y(em, i, -1);
 443                 }
 444
 445                 if (y != node_min.Y - 1 && y >= water_level) {
 446                         ridge_heightmap[index] = y; //update ridgeheight
 447                         ntopnodes = biome->top_depth;
 448                         for (; y <= node_max.Y && ntopnodes; y++) {
 449                                 ntopnodes--;
 450                                 vm->m_data[i] = MapNode(biome->c_top);
 451                                 vm->m_area.add_y(em, i, 1);
 452                         }
 453                         // If dirt, grow grass on it.
 454                         if (y > water_level - 10 &&
 455                                 vm->m_data[i].getContent() == CONTENT_AIR) {
 456                                 vm->m_area.add_y(em, i, -1);
 457                                 if (vm->m_data[i].getContent() == c_dirt)
 458                                         vm->m_data[i] = MapNode(c_dirt_with_grass);
 459                         }
 460                 }
 461
 462                 //////////////////// Now, add top nodes on top of the ridge
 463                 y = heightmap[index];
 464                 if (y > node_max.Y) {
 465                         y = node_max.Y; // Let's see if we can still go downward anyway
 466                         u32 vi = vm->m_area.index(x, y, z);
 467                         content_t c = vm->m_data[vi].getContent();
 468                         if (ndef->get(c).walkable)
 469                                 continue;
 470                 }
 471
 472                 i = vm->m_area.index(x, y, z);
 473                 for (; y >= node_min.Y; y--) {
 474                         content_t c = vm->m_data[i].getContent();
 475                         if (ndef->get(c).walkable)
 476                                 break;
 477                         vm->m_area.add_y(em, i, -1);
 478                 }
 479
 480                 if (y != node_min.Y - 1) {
 481                         ntopnodes = biome->top_depth;
 482                         // Let's see if we've already added it...
 483                         if (y == ridge_heightmap[index] + ntopnodes - 1)
 484                                 continue;
 485
 486                         for (; y <= node_max.Y && ntopnodes; y++) {
 487                                 ntopnodes--;
 488                                 vm->m_data[i] = MapNode(biome->c_top);
 489                                 vm->m_area.add_y(em, i, 1);
 490                         }
 491                         // If dirt, grow grass on it.
 492                         if (y > water_level - 10 &&
 493                                 vm->m_data[i].getContent() == CONTENT_AIR) {
 494                                 vm->m_area.add_y(em, i, -1);
 495                                 if (vm->m_data[i].getContent() == c_dirt)
 496                                         vm->m_data[i] = MapNode(c_dirt_with_grass);
 497                         }
 498                 }
 499         }
 500 }
 501
 502
 503 #include "mapgen_v6.h"
 504 void MapgenV7::generateCaves(int max_stone_y) {
 505         PseudoRandom ps(blockseed + 21343);
 506
 507         int volume_nodes = (node_max.X - node_min.X + 1) *
 508                                            (node_max.Y - node_min.Y + 1) *
 509                                            (node_max.Z - node_min.Z + 1);
 510         float cave_amount = NoisePerlin2D(&nparams_v6_def_cave,
 511                                                                 node_min.X, node_min.Y, seed);
 512
 513         u32 caves_count = MYMAX(0.0, cave_amount) * volume_nodes / 250000;
 514         for (u32 i = 0; i < caves_count; i++) {
 515                 CaveV7 cave(this, &ps, false);
 516                 cave.makeCave(node_min, node_max, max_stone_y);
 517         }
 518
 519         u32 bruises_count = (ps.range(1, 8) == 1) ? ps.range(0, ps.range(0, 2)) : 1;
 520         for (u32 i = 0; i < bruises_count; i++) {
 521                 CaveV7 cave(this, &ps, true);
 522                 cave.makeCave(node_min, node_max, max_stone_y);
 523         }
 524 }