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         return 20;
 119 }
 120
 121
 122 void MapgenV7::makeChunk(BlockMakeData *data) {
 123         assert(data->vmanip);
 124         assert(data->nodedef);
 125         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 126                    data->blockpos_requested.Y >= data->blockpos_min.Y &&
 127                    data->blockpos_requested.Z >= data->blockpos_min.Z);
 128         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 129                    data->blockpos_requested.Y <= data->blockpos_max.Y &&
 130                    data->blockpos_requested.Z <= data->blockpos_max.Z);
 131
 132         this->generating = true;
 133         this->vm   = data->vmanip;
 134         this->ndef = data->nodedef;
 135         //TimeTaker t("makeChunk");
 136
 137         v3s16 blockpos_min = data->blockpos_min;
 138         v3s16 blockpos_max = data->blockpos_max;
 139         v3s16 blockpos_full_min = blockpos_min - v3s16(1, 1, 1);
 140         v3s16 blockpos_full_max = blockpos_max + v3s16(1, 1, 1);
 141         node_min = blockpos_min * MAP_BLOCKSIZE;
 142         node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 143         full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
 144         full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 145
 146         blockseed = emerge->getBlockSeed(full_node_min);  //////use getBlockSeed2()!
 147
 148         // Make some noise
 149         calculateNoise();
 150
 151         // Calculate height map
 152         s16 stone_surface_max_y = calcHeightMap();
 153
 154         // Calculate biomes
 155         BiomeNoiseInput binput;
 156         binput.mapsize       = v2s16(csize.X, csize.Z);
 157         binput.heat_map      = noise_heat->result;
 158         binput.humidity_map  = noise_humidity->result;
 159         binput.height_map    = heightmap;
 160         bmgr->calcBiomes(&binput, biomemap);
 161
 162         c_stone           = ndef->getId("mapgen_stone");
 163         c_dirt            = ndef->getId("mapgen_dirt");
 164         c_dirt_with_grass = ndef->getId("mapgen_dirt_with_grass");
 165         c_sand            = ndef->getId("mapgen_sand");
 166         c_water_source    = ndef->getId("mapgen_water_source");
 167         c_lava_source     = ndef->getId("mapgen_lava_source");
 168
 169         generateTerrain();
 170         carveRidges();
 171
 172         //carveRivers();
 173
 174
 175         generateCaves(stone_surface_max_y);
 176         addTopNodes();
 177         growGrass();
 178         //v3s16 central_area_size = node_max - node_min + v3s16(1,1,1);
 179
 180         if (flags & MG_DUNGEONS) {
 181                 DungeonGen dgen(ndef, data->seed, water_level);
 182                 dgen.generate(vm, blockseed, full_node_min, full_node_max);
 183         }
 184
 185         for (size_t i = 0; i != emerge->ores.size(); i++) {
 186                 Ore *ore = emerge->ores[i];
 187                 ore->placeOre(this, blockseed + i, node_min, node_max);
 188         }
 189
 190         //printf("makeChunk: %dms\n", t.stop());
 191
 192         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 193
 194         calcLighting(node_min - v3s16(1, 0, 1) * MAP_BLOCKSIZE,
 195                                  node_max + v3s16(1, 0, 1) * MAP_BLOCKSIZE);
 196         //setLighting(node_min, node_max, 0xFF);
 197
 198         this->generating = false;
 199 }
 200
 201
 202 void MapgenV7::calculateNoise() {
 203         //TimeTaker t("calculateNoise", NULL, PRECISION_MICRO);
 204         int x = node_min.X;
 205         int y = node_min.Y;
 206         int z = node_min.Z;
 207
 208         noise_terrain_mod->perlinMap2D(x, z);
 209
 210         noise_height_select->perlinMap2D(x, z);
 211         noise_height_select->transformNoiseMap();
 212
 213         noise_terrain_persist->perlinMap2D(x, z);
 214         float *persistmap = noise_terrain_persist->result;
 215         for (int i = 0; i != csize.X * csize.Z; i++)
 216                 persistmap[i] = abs(persistmap[i]);
 217
 218         noise_terrain_base->perlinMap2DModulated(x, z, persistmap);
 219         noise_terrain_base->transformNoiseMap();
 220
 221         noise_terrain_alt->perlinMap2DModulated(x, z, persistmap);
 222         noise_terrain_alt->transformNoiseMap();
 223
 224         noise_ridge->perlinMap3D(x, y, z);
 225
 226         noise_heat->perlinMap2D(x, z);
 227
 228         noise_humidity->perlinMap2D(x, z);
 229
 230         //printf("calculateNoise: %dus\n", t.stop());
 231 }
 232
 233
 234 Biome *MapgenV7::getBiomeAtPoint(v3s16 p) {
 235         float heat      = NoisePerlin2D(bmgr->np_heat, p.X, p.Z, seed);
 236         float humidity  = NoisePerlin2D(bmgr->np_humidity, p.X, p.Z, seed);
 237         s16 groundlevel = baseTerrainLevelAtPoint(p.X, p.Z);
 238
 239         return bmgr->getBiome(heat, humidity, groundlevel);
 240 }
 241
 242
 243 float MapgenV7::baseTerrainLevelAtPoint(int x, int z) {
 244         float terrain_mod = NoisePerlin2DNoTxfm(noise_terrain_mod->np, x, z, seed);
 245         float hselect     = NoisePerlin2D(noise_height_select->np, x, z, seed);
 246         float persist     = abs(NoisePerlin2DNoTxfm(noise_terrain_persist->np, x, z, seed));
 247
 248         noise_terrain_base->np->persist = persist;
 249         float terrain_base = NoisePerlin2D(noise_terrain_base->np, x, z, seed);
 250         float height_base  = terrain_base * terrain_mod;
 251
 252         noise_terrain_alt->np->persist = persist;
 253         float height_alt = NoisePerlin2D(noise_terrain_alt->np, x, z, seed);
 254
 255         return (height_base * hselect) + (height_alt * (1.0 - hselect));
 256 }
 257
 258
 259 float MapgenV7::baseTerrainLevelFromMap(int index) {
 260         float terrain_mod  = noise_terrain_mod->result[index];
 261         float hselect      = noise_height_select->result[index];
 262         float terrain_base = noise_terrain_base->result[index];
 263         float height_base  = terrain_base * terrain_mod;
 264         float height_alt   = noise_terrain_alt->result[index];
 265
 266         return (height_base * hselect) + (height_alt * (1.0 - hselect));
 267 }
 268
 269
 270 #if 0
 271 // Crap code to test log rivers as a proof-of-concept.  Didn't work out too well.
 272 void MapgenV7::carveRivers() {
 273         MapNode n_air(CONTENT_AIR), n_water_source(c_water_source);
 274         MapNode n_stone(c_stone);
 275         u32 index = 0;
 276
 277         int river_depth = 4;
 278
 279         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 280         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 281                 float terrain_mod  = noise_terrain_mod->result[index];
 282                 NoiseParams *np = noise_terrain_river->np;
 283                 np->persist = noise_terrain_persist->result[index];
 284                 float terrain_river = NoisePerlin2DNoTxfm(np, x, z, seed);
 285                 float height = terrain_river * (1 - abs(terrain_mod)) *
 286                                                 noise_terrain_river->np->scale;
 287                 height = log(height * height); //log(h^3) is pretty interesting for terrain
 288
 289                 s16 y = heightmap[index];
 290                 if (height < 1.0 && y > river_depth &&
 291                         y - river_depth >= node_min.Y && y <= node_max.Y) {
 292
 293                         for (s16 ry = y; ry != y - river_depth; ry--) {
 294                                 u32 vi = vm->m_area.index(x, ry, z);
 295                                 vm->m_data[vi] = n_air;
 296                         }
 297
 298                         u32 vi = vm->m_area.index(x, y - river_depth, z);
 299                         vm->m_data[vi] = n_water_source;
 300                 }
 301         }
 302 }
 303 #endif
 304
 305
 306 int MapgenV7::calcHeightMap() {
 307         int stone_surface_max_y = -MAP_GENERATION_LIMIT;
 308         u32 index = 0;
 309
 310         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 311         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 312                 float surface_height = baseTerrainLevelFromMap(index);
 313                 s16 surface_y = (s16)surface_height;
 314
 315                 heightmap[index]       = surface_y;
 316                 ridge_heightmap[index] = surface_y;
 317
 318                 if (surface_y > stone_surface_max_y)
 319                         stone_surface_max_y = surface_y;
 320         }
 321
 322         return stone_surface_max_y;
 323 }
 324
 325
 326 void MapgenV7::generateTerrain() {
 327         MapNode n_air(CONTENT_AIR), n_water_source(c_water_source);
 328         MapNode n_stone(c_stone);
 329
 330         v3s16 em = vm->m_area.getExtent();
 331         u32 index = 0;
 332
 333         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 334         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 335                 s16 surface_y = heightmap[index];
 336                 Biome *biome = bmgr->biomes[biomemap[index]];
 337
 338                 u32 i = vm->m_area.index(x, node_min.Y, z);
 339                 for (s16 y = node_min.Y; y <= node_max.Y; y++) {
 340                         if (vm->m_data[i].getContent() == CONTENT_IGNORE) {
 341                                 if (y <= surface_y) {
 342                                         vm->m_data[i] = (y > water_level + biome->filler_height) ?
 343                                                 MapNode(biome->c_filler) : n_stone;
 344                                 } else if (y <= water_level) {
 345                                         vm->m_data[i] = n_water_source;
 346                                 } else {
 347                                         vm->m_data[i] = n_air;
 348                                 }
 349                         }
 350                         vm->m_area.add_y(em, i, 1);
 351                 }
 352         }
 353 }
 354
 355
 356 void MapgenV7::carveRidges() {
 357         if (node_max.Y <= water_level)
 358                 return;
 359
 360         MapNode n_air(CONTENT_AIR);
 361         u32 index = 0;
 362
 363         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 364         for (s16 y = node_min.Y; y <= node_max.Y; y++) {
 365                 u32 vi = vm->m_area.index(node_min.X, y, z);
 366                 for (s16 x = node_min.X; x <= node_max.X; x++, index++, vi++) {
 367                         // Removing this check will create huge underwater caverns,
 368                         // which are interesting but not desirable for gameplay
 369                         if (y <= water_level)
 370                                 continue;
 371
 372                         if (noise_ridge->result[index] * (float)(y * y) < 15.0)
 373                                 continue;
 374
 375                         int j = (z - node_min.Z) * csize.Z + (x - node_min.X); //////obviously just temporary
 376                         if (y < ridge_heightmap[j])
 377                                 ridge_heightmap[j] = y - 1;
 378
 379                         vm->m_data[vi] = n_air;
 380                 }
 381         }
 382 }
 383
 384 /*
 385 void MapgenV7::testBiomes() {
 386         u32 index = 0;
 387
 388         for (s16 z = node_min.Z; z <= node_min.Z; z++)
 389         for (s16 x = node_min.X; x <= node_min.X; x++) {;
 390                 Biome *b = bmgr->getBiome(heat, humidity, 0);
 391         }
 392         // make an 80x80 grid with axes heat/humidity as a voroni diagram for biomes
 393         // clear out y space for it first with air
 394         // use absolute positioning, each chunk will be a +1 height
 395 }*/
 396
 397
 398 void MapgenV7::addTopNodes() {
 399         v3s16 em = vm->m_area.getExtent();
 400         s16 ntopnodes;
 401         u32 index = 0;
 402
 403         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 404         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 405                 Biome *biome = bmgr->biomes[biomemap[index]];
 406
 407                 // First, add top nodes below the ridge
 408                 s16 y = ridge_heightmap[index];
 409
 410                 // This cutoff is good enough, but not perfect.
 411                 // It will cut off potentially placed top nodes at chunk boundaries
 412                 if (y < node_min.Y)
 413                         continue;
 414                 if (y > node_max.Y) {
 415                         y = node_max.Y; // Let's see if we can still go downward anyway
 416                         u32 vi = vm->m_area.index(x, y, z);
 417                         content_t c = vm->m_data[vi].getContent();
 418                         if (c == biome->c_filler || c == c_stone)//c != CONTENT_AIR)
 419                                 continue;
 420                 }
 421
 422                 // N.B.  It is necessary to search downward since range_heightmap[i]
 423                 // might not be the actual height, just the lowest part in the chunk
 424                 // where a ridge had been carved
 425                 u32 i = vm->m_area.index(x, y, z);
 426                 for (; y >= node_min.Y; y--) {
 427                         content_t c = vm->m_data[i].getContent();
 428                         if (c == biome->c_filler || c == c_stone)//c != CONTENT_AIR)
 429                         //if (vm->m_data[i].getContent() != CONTENT_AIR)
 430                                 break;
 431                         vm->m_area.add_y(em, i, -1);
 432                 }
 433
 434
 435
 436                 if (y != node_min.Y - 1) {
 437                         ridge_heightmap[index] = y; //update ridgeheight
 438                         ntopnodes = biome->top_depth;
 439                         for (; y <= node_max.Y && ntopnodes; y++) {
 440                                 ntopnodes--;
 441                                 vm->m_data[i] = MapNode(biome->c_top);
 442                                 vm->m_area.add_y(em, i, 1);
 443                         }
 444                         //heightmap[index] = y;
 445                 }
 446
 447                 // Now, add top nodes on top of the ridge
 448                 y = heightmap[index];
 449
 450                 i = vm->m_area.index(x, y, z);
 451                 for (; y >= node_min.Y; y--) {
 452                         content_t c = vm->m_data[i].getContent();
 453                         if (c == biome->c_filler || c == c_stone)//c != CONTENT_AIR)
 454                         //if (vm->m_data[i].getContent() != CONTENT_AIR)
 455                                 break;
 456                         vm->m_area.add_y(em, i, -1);
 457                 }
 458
 459                 if (y != node_min.Y - 1) {
 460                         ntopnodes = biome->top_depth;
 461                         // Let's see if we've already added it...
 462                         if (y == ridge_heightmap[index] + ntopnodes - 1)
 463                                 continue;
 464
 465                         for (; y <= node_max.Y && ntopnodes; y++) {
 466                                 ntopnodes--;
 467                                 vm->m_data[i] = MapNode(biome->c_top);
 468                                 vm->m_area.add_y(em, i, 1);
 469                         }
 470                 }
 471         }
 472 }
 473
 474
 475 void MapgenV7::growGrass() {
 476         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 477         for (s16 x = node_min.X; x <= node_max.X; x++) {
 478                 // Find the lowest surface to which enough light ends up to make
 479                 // grass grow.  Basically just wait until not air and not leaves.
 480                 s16 surface_y = 0;
 481                 {
 482                         v3s16 em = vm->m_area.getExtent();
 483                         u32 i = vm->m_area.index(x, node_max.Y, z);
 484                         s16 y;
 485                         // Go to ground level
 486                         for (y = node_max.Y; y >= node_min.Y; y--) {
 487                                 MapNode &n = vm->m_data[i];
 488                                 if (ndef->get(n).param_type != CPT_LIGHT ||
 489                                         ndef->get(n).liquid_type != LIQUID_NONE)
 490                                         break;
 491                                 vm->m_area.add_y(em, i, -1);
 492                         }
 493                         surface_y = (y >= node_min.Y) ? y : node_min.Y;
 494                 }
 495
 496                 u32 i = vm->m_area.index(x, surface_y, z);
 497                 MapNode *n = &vm->m_data[i];
 498                 if (n->getContent() == c_dirt && surface_y >= water_level - 20)
 499                         n->setContent(c_dirt_with_grass);
 500         }
 501 }
 502
 503 #include "mapgen_v6.h"
 504 void MapgenV7::generateCaves(int max_stone_y) {
 505         PseudoRandom ps(blockseed + 21343);
 506         PseudoRandom ps2(blockseed + 1032);
 507
 508         int volume_nodes = (node_max.X - node_min.X + 1) *
 509                                            (node_max.Y - node_min.Y + 1) * MAP_BLOCKSIZE;
 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 / 50000;
 514         for (u32 i = 0; i < caves_count; i++) {
 515                 CaveV6 cave(this, &ps, &ps2, false, c_water_source, c_lava_source);
 516                 cave.makeCave(node_min, node_max, max_stone_y);
 517         }
 518
 519         u32 bruises_count = (ps.range(1, 6) == 1) ? ps.range(0, ps.range(0, 2)) : 1;
 520         for (u32 i = 0; i < bruises_count; i++) {
 521                 CaveV6 cave(this, &ps, &ps2, true, c_water_source, c_lava_source);
 522                 cave.makeCave(node_min, node_max, max_stone_y);
 523         }
 524 }