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, 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->lighting = 1;
  81         this->ridges   = 1;
  82
  83         this->csize   = v3s16(1, 1, 1) * params->chunksize * MAP_BLOCKSIZE;
  84         this->ystride = csize.X; //////fix this
  85
  86         this->biomemap  = new u8[csize.X * csize.Z];
  87         this->heightmap = new s16[csize.X * csize.Z];
  88         this->ridge_heightmap = new s16[csize.X * csize.Z];
  89
  90         // Terrain noise
  91         noise_terrain_base    = new Noise(&params->np_terrain_base,    seed, csize.X, csize.Z);
  92         noise_terrain_alt     = new Noise(&params->np_terrain_alt,     seed, csize.X, csize.Z);
  93         noise_terrain_mod     = new Noise(&params->np_terrain_mod,     seed, csize.X, csize.Z);
  94         noise_terrain_persist = new Noise(&params->np_terrain_persist, seed, csize.X, csize.Z);
  95         noise_height_select   = new Noise(&params->np_height_select,   seed, csize.X, csize.Z);
  96         noise_ridge           = new Noise(&params->np_ridge, seed, csize.X, csize.Y, csize.Z);
  97
  98         // Biome noise
  99         noise_heat     = new Noise(bmgr->np_heat,     seed, csize.X, csize.Z);
 100         noise_humidity = new Noise(bmgr->np_humidity, seed, csize.X, csize.Z);
 101 }
 102
 103
 104 MapgenV7::~MapgenV7() {
 105         delete noise_terrain_base;
 106         delete noise_terrain_mod;
 107         delete noise_terrain_persist;
 108         delete noise_height_select;
 109         delete noise_terrain_alt;
 110         delete noise_ridge;
 111         delete noise_heat;
 112         delete noise_humidity;
 113
 114         delete[] ridge_heightmap;
 115         delete[] heightmap;
 116         delete[] biomemap;
 117 }
 118
 119
 120 int MapgenV7::getGroundLevelAtPoint(v2s16 p) {
 121         s16 groundlevel = baseTerrainLevelAtPoint(p.X, p.Y);
 122         float heat      = NoisePerlin2D(bmgr->np_heat, p.X, p.Y, seed);
 123         float humidity  = NoisePerlin2D(bmgr->np_humidity, p.X, p.Y, seed);
 124         Biome *b = bmgr->getBiome(heat, humidity, groundlevel);
 125
 126         s16 y = groundlevel;
 127         int iters = 1024; // don't even bother iterating more than 64 times..
 128         while (iters--) {
 129                 if (y <= water_level)
 130                         break;
 131
 132                 float ridgenoise = NoisePerlin3D(noise_ridge->np, p.X, y, p.Y, seed);
 133                 if (ridgenoise * (float)(y * y) < 15.0)
 134                         break;
 135
 136                 y--;
 137         }
 138
 139         return y + b->top_depth;
 140 }
 141
 142
 143 void MapgenV7::makeChunk(BlockMakeData *data) {
 144         assert(data->vmanip);
 145         assert(data->nodedef);
 146         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 147                    data->blockpos_requested.Y >= data->blockpos_min.Y &&
 148                    data->blockpos_requested.Z >= data->blockpos_min.Z);
 149         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 150                    data->blockpos_requested.Y <= data->blockpos_max.Y &&
 151                    data->blockpos_requested.Z <= data->blockpos_max.Z);
 152
 153         this->generating = true;
 154         this->vm   = data->vmanip;
 155         this->ndef = data->nodedef;
 156         //TimeTaker t("makeChunk");
 157
 158         v3s16 blockpos_min = data->blockpos_min;
 159         v3s16 blockpos_max = data->blockpos_max;
 160         node_min = blockpos_min * MAP_BLOCKSIZE;
 161         node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 162         full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
 163         full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 164
 165         blockseed = emerge->getBlockSeed(full_node_min);  //////use getBlockSeed2()!
 166
 167         // Make some noise
 168         calculateNoise();
 169
 170         // Calculate height map
 171         s16 stone_surface_max_y = calcHeightMap();
 172
 173         // Calculate biomes
 174         BiomeNoiseInput binput;
 175         binput.mapsize       = v2s16(csize.X, csize.Z);
 176         binput.heat_map      = noise_heat->result;
 177         binput.humidity_map  = noise_humidity->result;
 178         binput.height_map    = heightmap;
 179         bmgr->calcBiomes(&binput, biomemap);
 180
 181         c_stone           = ndef->getId("mapgen_stone");
 182         c_dirt            = ndef->getId("mapgen_dirt");
 183         c_dirt_with_grass = ndef->getId("mapgen_dirt_with_grass");
 184         c_sand            = ndef->getId("mapgen_sand");
 185         c_water_source    = ndef->getId("mapgen_water_source");
 186         c_lava_source     = ndef->getId("mapgen_lava_source");
 187
 188         generateTerrain();
 189         if (this->ridges)
 190                 carveRidges();
 191
 192         if (flags & MG_CAVES)
 193                 generateCaves(stone_surface_max_y);
 194
 195         addTopNodes();
 196
 197         updateHeightmap(node_min, node_max);
 198
 199         if (flags & MG_DUNGEONS) {
 200                 DungeonGen dgen(ndef, data->seed, water_level);
 201                 dgen.generate(vm, blockseed, full_node_min, full_node_max);
 202         }
 203
 204         for (size_t i = 0; i != emerge->decorations.size(); i++) {
 205                 Decoration *deco = emerge->decorations[i];
 206                 deco->placeDeco(this, blockseed + i, node_min, node_max);
 207         }
 208
 209         for (size_t i = 0; i != emerge->ores.size(); i++) {
 210                 Ore *ore = emerge->ores[i];
 211                 ore->placeOre(this, blockseed + i, node_min, node_max);
 212         }
 213
 214         //printf("makeChunk: %dms\n", t.stop());
 215
 216         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 217
 218         if (this->lighting)
 219                 calcLighting(node_min - v3s16(1, 0, 1) * MAP_BLOCKSIZE,
 220                                  node_max + v3s16(1, 0, 1) * MAP_BLOCKSIZE);
 221         //setLighting(node_min - v3s16(1, 0, 1) * MAP_BLOCKSIZE,
 222         //                      node_max + v3s16(1, 0, 1) * MAP_BLOCKSIZE, 0xFF);
 223
 224         this->generating = false;
 225 }
 226
 227
 228 void MapgenV7::calculateNoise() {
 229         //TimeTaker t("calculateNoise", NULL, PRECISION_MICRO);
 230         int x = node_min.X;
 231         int y = node_min.Y;
 232         int z = node_min.Z;
 233
 234         noise_terrain_mod->perlinMap2D(x, z);
 235
 236         noise_height_select->perlinMap2D(x, z);
 237         noise_height_select->transformNoiseMap();
 238
 239         noise_terrain_persist->perlinMap2D(x, z);
 240         float *persistmap = noise_terrain_persist->result;
 241         for (int i = 0; i != csize.X * csize.Z; i++)
 242                 persistmap[i] = abs(persistmap[i]);
 243
 244         noise_terrain_base->perlinMap2DModulated(x, z, persistmap);
 245         noise_terrain_base->transformNoiseMap();
 246
 247         noise_terrain_alt->perlinMap2DModulated(x, z, persistmap);
 248         noise_terrain_alt->transformNoiseMap();
 249
 250         noise_ridge->perlinMap3D(x, y, z);
 251
 252         noise_heat->perlinMap2D(x, z);
 253
 254         noise_humidity->perlinMap2D(x, z);
 255
 256         //printf("calculateNoise: %dus\n", t.stop());
 257 }
 258
 259
 260 Biome *MapgenV7::getBiomeAtPoint(v3s16 p) {
 261         float heat      = NoisePerlin2D(bmgr->np_heat, p.X, p.Z, seed);
 262         float humidity  = NoisePerlin2D(bmgr->np_humidity, p.X, p.Z, seed);
 263         s16 groundlevel = baseTerrainLevelAtPoint(p.X, p.Z);
 264
 265         return bmgr->getBiome(heat, humidity, groundlevel);
 266 }
 267
 268
 269 float MapgenV7::baseTerrainLevelAtPoint(int x, int z) {
 270         float terrain_mod = NoisePerlin2DNoTxfm(noise_terrain_mod->np, x, z, seed);
 271         float hselect     = NoisePerlin2D(noise_height_select->np, x, z, seed);
 272         float persist     = abs(NoisePerlin2DNoTxfm(noise_terrain_persist->np, x, z, seed));
 273
 274         noise_terrain_base->np->persist = persist;
 275         float terrain_base = NoisePerlin2D(noise_terrain_base->np, x, z, seed);
 276         float height_base  = terrain_base * terrain_mod;
 277
 278         noise_terrain_alt->np->persist = persist;
 279         float height_alt = NoisePerlin2D(noise_terrain_alt->np, x, z, seed);
 280
 281         return (height_base * hselect) + (height_alt * (1.0 - hselect));
 282 }
 283
 284
 285 float MapgenV7::baseTerrainLevelFromMap(int index) {
 286         float terrain_mod  = noise_terrain_mod->result[index];
 287         float hselect      = noise_height_select->result[index];
 288         float terrain_base = noise_terrain_base->result[index];
 289         float height_base  = terrain_base * terrain_mod;
 290         float height_alt   = noise_terrain_alt->result[index];
 291
 292         return (height_base * hselect) + (height_alt * (1.0 - hselect));
 293 }
 294
 295
 296 #if 0
 297 // Crap code to test log rivers as a proof-of-concept.  Didn't work out too well.
 298 void MapgenV7::carveRivers() {
 299         MapNode n_air(CONTENT_AIR), n_water_source(c_water_source);
 300         MapNode n_stone(c_stone);
 301         u32 index = 0;
 302
 303         int river_depth = 4;
 304
 305         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 306         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 307                 float terrain_mod  = noise_terrain_mod->result[index];
 308                 NoiseParams *np = noise_terrain_river->np;
 309                 np->persist = noise_terrain_persist->result[index];
 310                 float terrain_river = NoisePerlin2DNoTxfm(np, x, z, seed);
 311                 float height = terrain_river * (1 - abs(terrain_mod)) *
 312                                                 noise_terrain_river->np->scale;
 313                 height = log(height * height); //log(h^3) is pretty interesting for terrain
 314
 315                 s16 y = heightmap[index];
 316                 if (height < 1.0 && y > river_depth &&
 317                         y - river_depth >= node_min.Y && y <= node_max.Y) {
 318
 319                         for (s16 ry = y; ry != y - river_depth; ry--) {
 320                                 u32 vi = vm->m_area.index(x, ry, z);
 321                                 vm->m_data[vi] = n_air;
 322                         }
 323
 324                         u32 vi = vm->m_area.index(x, y - river_depth, z);
 325                         vm->m_data[vi] = n_water_source;
 326                 }
 327         }
 328 }
 329 #endif
 330
 331
 332 int MapgenV7::calcHeightMap() {
 333         int stone_surface_max_y = -MAP_GENERATION_LIMIT;
 334         u32 index = 0;
 335
 336         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 337         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 338                 float surface_height = baseTerrainLevelFromMap(index);
 339                 s16 surface_y = (s16)surface_height;
 340
 341                 heightmap[index]       = surface_y;
 342                 ridge_heightmap[index] = surface_y;
 343
 344                 if (surface_y > stone_surface_max_y)
 345                         stone_surface_max_y = surface_y;
 346         }
 347
 348         return stone_surface_max_y;
 349 }
 350
 351
 352 void MapgenV7::generateTerrain() {
 353         MapNode n_air(CONTENT_AIR), n_water_source(c_water_source);
 354         MapNode n_stone(c_stone);
 355
 356         v3s16 em = vm->m_area.getExtent();
 357         u32 index = 0;
 358
 359         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 360         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 361                 s16 surface_y = heightmap[index];
 362                 Biome *biome = bmgr->biomes[biomemap[index]];
 363
 364                 u32 i = vm->m_area.index(x, node_min.Y, z);
 365                 for (s16 y = node_min.Y; y <= node_max.Y; y++) {
 366                         if (vm->m_data[i].getContent() == CONTENT_IGNORE) {
 367                                 if (y <= surface_y) {
 368                                         vm->m_data[i] = (y > water_level + biome->filler_height) ?
 369                                                 MapNode(biome->c_filler) : n_stone;
 370                                 } else if (y <= water_level) {
 371                                         vm->m_data[i] = n_water_source;
 372                                 } else {
 373                                         vm->m_data[i] = n_air;
 374                                 }
 375                         }
 376                         vm->m_area.add_y(em, i, 1);
 377                 }
 378         }
 379 }
 380
 381
 382 void MapgenV7::carveRidges() {
 383         if (node_max.Y <= water_level)
 384                 return;
 385
 386         MapNode n_air(CONTENT_AIR);
 387         u32 index = 0;
 388
 389         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 390         for (s16 y = node_min.Y; y <= node_max.Y; y++) {
 391                 u32 vi = vm->m_area.index(node_min.X, y, z);
 392                 for (s16 x = node_min.X; x <= node_max.X; x++, index++, vi++) {
 393                         // Removing this check will create huge underwater caverns,
 394                         // which are interesting but not desirable for gameplay
 395                         if (y <= water_level)
 396                                 continue;
 397
 398                         if (noise_ridge->result[index] * (float)(y * y) < 15.0)
 399                                 continue;
 400
 401                         int j = (z - node_min.Z) * csize.Z + (x - node_min.X); //////obviously just temporary
 402                         if (y < ridge_heightmap[j])
 403                                 ridge_heightmap[j] = y - 1;
 404
 405                         vm->m_data[vi] = n_air;
 406                 }
 407         }
 408 }
 409
 410 /*
 411 void MapgenV7::testBiomes() {
 412         u32 index = 0;
 413
 414         for (s16 z = node_min.Z; z <= node_min.Z; z++)
 415         for (s16 x = node_min.X; x <= node_min.X; x++) {;
 416                 Biome *b = bmgr->getBiome(heat, humidity, 0);
 417         }
 418         // make an 80x80 grid with axes heat/humidity as a voroni diagram for biomes
 419         // clear out y space for it first with air
 420         // use absolute positioning, each chunk will be a +1 height
 421 }*/
 422
 423
 424 void MapgenV7::addTopNodes() {
 425         v3s16 em = vm->m_area.getExtent();
 426         s16 ntopnodes;
 427         u32 index = 0;
 428
 429         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 430         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 431                 Biome *biome = bmgr->biomes[biomemap[index]];
 432
 433                 //////////////////// First, add top nodes below the ridge
 434                 s16 y = ridge_heightmap[index];
 435
 436                 // This cutoff is good enough, but not perfect.
 437                 // It will cut off potentially placed top nodes at chunk boundaries
 438                 if (y < node_min.Y)
 439                         continue;
 440                 if (y > node_max.Y) {
 441                         y = node_max.Y; // Let's see if we can still go downward anyway
 442                         u32 vi = vm->m_area.index(x, y, z);
 443                         content_t c = vm->m_data[vi].getContent();
 444                         if (ndef->get(c).walkable)
 445                                 continue;
 446                 }
 447
 448                 // N.B.  It is necessary to search downward since ridge_heightmap[i]
 449                 // might not be the actual height, just the lowest part in the chunk
 450                 // where a ridge had been carved
 451                 u32 i = vm->m_area.index(x, y, z);
 452                 for (; y >= node_min.Y; y--) {
 453                         content_t c = vm->m_data[i].getContent();
 454                         if (ndef->get(c).walkable)
 455                                 break;
 456                         vm->m_area.add_y(em, i, -1);
 457                 }
 458
 459                 if (y != node_min.Y - 1 && y >= water_level) {
 460                         ridge_heightmap[index] = y; //update ridgeheight
 461                         ntopnodes = biome->top_depth;
 462                         for (; y <= node_max.Y && ntopnodes; y++) {
 463                                 ntopnodes--;
 464                                 vm->m_data[i] = MapNode(biome->c_top);
 465                                 vm->m_area.add_y(em, i, 1);
 466                         }
 467                         // If dirt, grow grass on it.
 468                         if (y > water_level - 10 &&
 469                                 vm->m_data[i].getContent() == CONTENT_AIR) {
 470                                 vm->m_area.add_y(em, i, -1);
 471                                 if (vm->m_data[i].getContent() == c_dirt)
 472                                         vm->m_data[i] = MapNode(c_dirt_with_grass);
 473                         }
 474                 }
 475
 476                 //////////////////// Now, add top nodes on top of the ridge
 477                 y = heightmap[index];
 478                 if (y > node_max.Y) {
 479                         y = node_max.Y; // Let's see if we can still go downward anyway
 480                         u32 vi = vm->m_area.index(x, y, z);
 481                         content_t c = vm->m_data[vi].getContent();
 482                         if (ndef->get(c).walkable)
 483                                 continue;
 484                 }
 485
 486                 i = vm->m_area.index(x, y, z);
 487                 for (; y >= node_min.Y; y--) {
 488                         content_t c = vm->m_data[i].getContent();
 489                         if (ndef->get(c).walkable)
 490                                 break;
 491                         vm->m_area.add_y(em, i, -1);
 492                 }
 493
 494                 if (y != node_min.Y - 1) {
 495                         ntopnodes = biome->top_depth;
 496                         // Let's see if we've already added it...
 497                         if (y == ridge_heightmap[index] + ntopnodes - 1)
 498                                 continue;
 499
 500                         for (; y <= node_max.Y && ntopnodes; y++) {
 501                                 ntopnodes--;
 502                                 vm->m_data[i] = MapNode(biome->c_top);
 503                                 vm->m_area.add_y(em, i, 1);
 504                         }
 505                         // If dirt, grow grass on it.
 506                         if (y > water_level - 10 &&
 507                                 vm->m_data[i].getContent() == CONTENT_AIR) {
 508                                 vm->m_area.add_y(em, i, -1);
 509                                 if (vm->m_data[i].getContent() == c_dirt)
 510                                         vm->m_data[i] = MapNode(c_dirt_with_grass);
 511                         }
 512                 }
 513         }
 514 }
 515
 516
 517 #include "mapgen_v6.h"
 518 void MapgenV7::generateCaves(int max_stone_y) {
 519         PseudoRandom ps(blockseed + 21343);
 520
 521         int volume_nodes = (node_max.X - node_min.X + 1) *
 522                                            (node_max.Y - node_min.Y + 1) *
 523                                            (node_max.Z - node_min.Z + 1);
 524         float cave_amount = NoisePerlin2D(&nparams_v6_def_cave,
 525                                                                 node_min.X, node_min.Y, seed);
 526
 527         u32 caves_count = MYMAX(0.0, cave_amount) * volume_nodes / 250000;
 528         for (u32 i = 0; i < caves_count; i++) {
 529                 CaveV7 cave(this, &ps, false);
 530                 cave.makeCave(node_min, node_max, max_stone_y);
 531         }
 532
 533         u32 bruises_count = (ps.range(1, 8) == 1) ? ps.range(0, ps.range(0, 2)) : 1;
 534         for (u32 i = 0; i < bruises_count; i++) {
 535                 CaveV7 cave(this, &ps, true);
 536                 cave.makeCave(node_min, node_max, max_stone_y);
 537         }
 538 }