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 "treegen.h"
  38 #include "biome.h"
  39 #include "mapgen_v7.h"
  40
  41
  42 /////////////////// Mapgen V7 perlin noise default values
  43 NoiseParams nparams_v7_def_terrain_base =
  44         {0, 80.0, v3f(250.0, 250.0, 250.0), 82341, 5, 0.6};
  45 NoiseParams nparams_v7_def_terrain_alt =
  46         {0, 20.0, v3f(250.0, 250.0, 250.0), 5934, 5, 0.6};
  47 NoiseParams nparams_v7_def_terrain_mod =
  48         {0, 1.0, v3f(350.0, 350.0, 350.0), 85039, 5, 0.6};
  49 NoiseParams nparams_v7_def_terrain_persist =
  50         {0, 1.0, v3f(500.0, 500.0, 500.0), 539, 3, 0.6};
  51 NoiseParams nparams_v7_def_height_select =
  52         {0.5, 0.5, v3f(250.0, 250.0, 250.0), 4213, 5, 0.69};
  53 NoiseParams nparams_v7_def_ridge =
  54         {0.5, 1.0, v3f(100.0, 100.0, 100.0), 6467, 4, 0.75};
  55 /*
  56 NoiseParams nparams_v6_def_beach =
  57         {0.0, 1.0, v3f(250.0, 250.0, 250.0), 59420, 3, 0.50};
  58 NoiseParams nparams_v6_def_cave =
  59         {6.0, 6.0, v3f(250.0, 250.0, 250.0), 34329, 3, 0.50};
  60 NoiseParams nparams_v6_def_humidity =
  61         {0.5, 0.5, v3f(500.0, 500.0, 500.0), 72384, 4, 0.66};
  62 NoiseParams nparams_v6_def_trees =
  63         {0.0, 1.0, v3f(125.0, 125.0, 125.0), 2, 4, 0.66};
  64 NoiseParams nparams_v6_def_apple_trees =
  65         {0.0, 1.0, v3f(100.0, 100.0, 100.0), 342902, 3, 0.45};
  66 */
  67 ///////////////////////////////////////////////////////////////////////////////
  68
  69
  70 MapgenV7::MapgenV7(int mapgenid, MapgenV7Params *params, EmergeManager *emerge) {
  71         this->generating  = false;
  72         this->id     = mapgenid;
  73         this->emerge = emerge;
  74         this->bmgr   = emerge->biomedef;
  75
  76         this->seed     = (int)params->seed;
  77         this->water_level = params->water_level;
  78         this->flags   = params->flags;
  79         this->csize   = v3s16(1, 1, 1) * params->chunksize * MAP_BLOCKSIZE;
  80 //      this->ystride = csize.X; //////fix this
  81
  82         this->biomemap  = new u8[csize.X * csize.Z];
  83         this->heightmap = new s16[csize.X * csize.Z];
  84         this->ridge_heightmap = new s16[csize.X * csize.Z];
  85
  86         // Terrain noise
  87         noise_terrain_base    = new Noise(params->np_terrain_base,    seed, csize.X, csize.Z);
  88         noise_terrain_alt     = new Noise(params->np_terrain_alt,     seed, csize.X, csize.Z);
  89         noise_terrain_mod     = new Noise(params->np_terrain_mod,     seed, csize.X, csize.Z);
  90         noise_terrain_persist = new Noise(params->np_terrain_persist, seed, csize.X, csize.Z);
  91         noise_height_select   = new Noise(params->np_height_select,   seed, csize.X, csize.Z);
  92         noise_ridge           = new Noise(params->np_ridge, seed, csize.X, csize.Y, csize.Z);
  93
  94         // Biome noise
  95         noise_heat     = new Noise(bmgr->np_heat,     seed, csize.X, csize.Z);
  96         noise_humidity = new Noise(bmgr->np_humidity, seed, csize.X, csize.Z);
  97 }
  98
  99
 100 MapgenV7::~MapgenV7() {
 101         delete noise_terrain_base;
 102         delete noise_terrain_mod;
 103         delete noise_terrain_persist;
 104         delete noise_height_select;
 105         delete noise_terrain_alt;
 106         delete noise_ridge;
 107         delete noise_heat;
 108         delete noise_humidity;
 109
 110         delete[] ridge_heightmap;
 111         delete[] heightmap;
 112         delete[] biomemap;
 113 }
 114
 115
 116 int MapgenV7::getGroundLevelAtPoint(v2s16 p) {
 117         return 20;
 118 }
 119
 120
 121 void MapgenV7::makeChunk(BlockMakeData *data) {
 122         assert(data->vmanip);
 123         assert(data->nodedef);
 124         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 125                    data->blockpos_requested.Y >= data->blockpos_min.Y &&
 126                    data->blockpos_requested.Z >= data->blockpos_min.Z);
 127         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 128                    data->blockpos_requested.Y <= data->blockpos_max.Y &&
 129                    data->blockpos_requested.Z <= data->blockpos_max.Z);
 130
 131         this->generating = true;
 132         this->vm   = data->vmanip;
 133         this->ndef = data->nodedef;
 134         //TimeTaker t("makeChunk");
 135
 136         v3s16 blockpos_min = data->blockpos_min;
 137         v3s16 blockpos_max = data->blockpos_max;
 138         v3s16 blockpos_full_min = blockpos_min - v3s16(1, 1, 1);
 139         v3s16 blockpos_full_max = blockpos_max + v3s16(1, 1, 1);
 140         node_min = blockpos_min * MAP_BLOCKSIZE;
 141         node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 142         full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
 143         full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 144
 145         //blockseed = emerge->getBlockSeed(full_node_min);
 146
 147         // Make some noise
 148         calculateNoise();
 149
 150         // Calculate height map
 151         s16 stone_surface_max_y = calcHeightMap();
 152
 153         // Calculate biomes
 154         BiomeNoiseInput binput;
 155         binput.mapsize       = v2s16(csize.X, csize.Z);
 156         binput.heat_map      = noise_heat->result;
 157         binput.humidity_map  = noise_humidity->result;
 158         binput.height_map    = heightmap;
 159         bmgr->calcBiomes(&binput, biomemap);
 160
 161         c_stone           = ndef->getId("mapgen_stone");
 162         c_dirt            = ndef->getId("mapgen_dirt");
 163         c_dirt_with_grass = ndef->getId("mapgen_dirt_with_grass");
 164         c_sand            = ndef->getId("mapgen_sand");
 165         c_water_source    = ndef->getId("mapgen_water_source");
 166
 167         generateTerrain();
 168         carveRidges();
 169
 170         //carveRivers();
 171         addTopNodes();
 172         growGrass();
 173
 174         //v3s16 central_area_size = node_max - node_min + v3s16(1,1,1);
 175
 176         if (flags & MG_DUNGEONS) {
 177                 DungeonGen dgen(ndef, data->seed, water_level);
 178                 dgen.generate(vm, blockseed, full_node_min, full_node_max);
 179         }
 180
 181         for (size_t i = 0; i != emerge->ores.size(); i++) {
 182                 Ore *ore = emerge->ores[i];
 183                 ore->generate(this, blockseed + i, node_min, node_max);
 184         }
 185
 186         //printf("makeChunk: %dms\n", t.stop());
 187
 188         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 189
 190         calcLighting(node_min - v3s16(1, 0, 1) * MAP_BLOCKSIZE,
 191                                  node_max + v3s16(1, 0, 1) * MAP_BLOCKSIZE);
 192         //setLighting(node_min, node_max, 0xFF);
 193
 194         this->generating = false;
 195 }
 196
 197
 198 void MapgenV7::calculateNoise() {
 199         //TimeTaker t("calculateNoise", NULL, PRECISION_MICRO);
 200         int x = node_min.X;
 201         int y = node_min.Y;
 202         int z = node_min.Z;
 203
 204         noise_terrain_mod->perlinMap2D(x, z);
 205
 206         noise_height_select->perlinMap2D(x, z);
 207         noise_height_select->transformNoiseMap();
 208
 209         noise_terrain_persist->perlinMap2D(x, z);
 210         float *persistmap = noise_terrain_persist->result;
 211         for (int i = 0; i != csize.X * csize.Z; i++)
 212                 persistmap[i] = abs(persistmap[i]);
 213
 214         noise_terrain_base->perlinMap2DModulated(x, z, persistmap);
 215         noise_terrain_base->transformNoiseMap();
 216
 217         noise_terrain_alt->perlinMap2DModulated(x, z, persistmap);
 218         noise_terrain_alt->transformNoiseMap();
 219
 220         noise_ridge->perlinMap3D(x, y, z);
 221
 222         noise_heat->perlinMap2D(x, z);
 223
 224         noise_humidity->perlinMap2D(x, z);
 225
 226         //printf("calculateNoise: %dus\n", t.stop());
 227 }
 228
 229
 230 Biome *MapgenV7::getBiomeAtPoint(v3s16 p) {
 231         float heat      = NoisePerlin2D(bmgr->np_heat, p.X, p.Z, seed);
 232         float humidity  = NoisePerlin2D(bmgr->np_humidity, p.X, p.Z, seed);
 233         s16 groundlevel = baseTerrainLevelAtPoint(p.X, p.Z);
 234
 235         return bmgr->getBiome(heat, humidity, groundlevel);
 236 }
 237
 238
 239 float MapgenV7::baseTerrainLevelAtPoint(int x, int z) {
 240         float terrain_mod = NoisePerlin2DNoTxfm(noise_terrain_mod->np, x, z, seed);
 241         float hselect     = NoisePerlin2D(noise_height_select->np, x, z, seed);
 242         float persist     = abs(NoisePerlin2DNoTxfm(noise_terrain_persist->np, x, z, seed));
 243
 244         noise_terrain_base->np->persist = persist;
 245         float terrain_base = NoisePerlin2D(noise_terrain_base->np, x, z, seed);
 246         float height_base  = terrain_base * terrain_mod;
 247
 248         noise_terrain_alt->np->persist = persist;
 249         float height_alt = NoisePerlin2D(noise_terrain_alt->np, x, z, seed);
 250
 251         return (height_base * hselect) + (height_alt * (1.0 - hselect));
 252 }
 253
 254
 255 float MapgenV7::baseTerrainLevelFromMap(int index) {
 256         float terrain_mod  = noise_terrain_mod->result[index];
 257         float hselect      = noise_height_select->result[index];
 258         float terrain_base = noise_terrain_base->result[index];
 259         float height_base  = terrain_base * terrain_mod;
 260         float height_alt   = noise_terrain_alt->result[index];
 261
 262         return (height_base * hselect) + (height_alt * (1.0 - hselect));
 263 }
 264
 265
 266 #if 0
 267 // Crap code to test log rivers as a proof-of-concept.  Didn't work out too well.
 268 void MapgenV7::carveRivers() {
 269         MapNode n_air(CONTENT_AIR), n_water_source(c_water_source);
 270         MapNode n_stone(c_stone);
 271         u32 index = 0;
 272
 273         int river_depth = 4;
 274
 275         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 276         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 277                 float terrain_mod  = noise_terrain_mod->result[index];
 278                 NoiseParams *np = noise_terrain_river->np;
 279                 np->persist = noise_terrain_persist->result[index];
 280                 float terrain_river = NoisePerlin2DNoTxfm(np, x, z, seed);
 281                 float height = terrain_river * (1 - abs(terrain_mod)) *
 282                                                 noise_terrain_river->np->scale;
 283                 height = log(height * height); //log(h^3) is pretty interesting for terrain
 284
 285                 s16 y = heightmap[index];
 286                 if (height < 1.0 && y > river_depth &&
 287                         y - river_depth >= node_min.Y && y <= node_max.Y) {
 288
 289                         for (s16 ry = y; ry != y - river_depth; ry--) {
 290                                 u32 vi = vm->m_area.index(x, ry, z);
 291                                 vm->m_data[vi] = n_air;
 292                         }
 293
 294                         u32 vi = vm->m_area.index(x, y - river_depth, z);
 295                         vm->m_data[vi] = n_water_source;
 296                 }
 297         }
 298 }
 299 #endif
 300
 301
 302 int MapgenV7::calcHeightMap() {
 303         int stone_surface_max_y = -MAP_GENERATION_LIMIT;
 304         u32 index = 0;
 305
 306         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 307         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 308                 float surface_height = baseTerrainLevelFromMap(index);
 309                 s16 surface_y = (s16)surface_height;
 310
 311                 heightmap[index]       = surface_y;
 312                 ridge_heightmap[index] = surface_y;
 313
 314                 if (surface_y > stone_surface_max_y)
 315                         stone_surface_max_y = surface_y;
 316         }
 317
 318         return stone_surface_max_y;
 319 }
 320
 321
 322 void MapgenV7::generateTerrain() {
 323         MapNode n_air(CONTENT_AIR), n_water_source(c_water_source);
 324         MapNode n_stone(c_stone);
 325
 326         v3s16 em = vm->m_area.getExtent();
 327         u32 index = 0;
 328
 329         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 330         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 331                 s16 surface_y = heightmap[index];
 332                 Biome *biome = bmgr->biomes[biomemap[index]];
 333
 334                 u32 i = vm->m_area.index(x, node_min.Y, z);
 335                 for (s16 y = node_min.Y; y <= node_max.Y; y++) {
 336                         if (vm->m_data[i].getContent() == CONTENT_IGNORE) {
 337                                 if (y <= surface_y) {
 338                                         vm->m_data[i] = (y > water_level + biome->filler_height) ?
 339                                                 MapNode(biome->c_filler) : n_stone;
 340                                 } else if (y <= water_level) {
 341                                         vm->m_data[i] = n_water_source;
 342                                 } else {
 343                                         vm->m_data[i] = n_air;
 344                                 }
 345                         }
 346                         vm->m_area.add_y(em, i, 1);
 347                 }
 348         }
 349 }
 350
 351
 352 void MapgenV7::carveRidges() {
 353         if (node_max.Y <= water_level)
 354                 return;
 355
 356         MapNode n_air(CONTENT_AIR);
 357         u32 index = 0;
 358
 359         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 360         for (s16 y = node_min.Y; y <= node_max.Y; y++) {
 361                 u32 vi = vm->m_area.index(node_min.X, y, z);
 362                 for (s16 x = node_min.X; x <= node_max.X; x++, index++, vi++) {
 363                         // Removing this check will create huge underwater caverns,
 364                         // which are interesting but not desirable for gameplay
 365                         if (y <= water_level)
 366                                 continue;
 367
 368                         if (noise_ridge->result[index] * (float)(y * y) < 15.0)
 369                                 continue;
 370
 371                         int j = (z - node_min.Z) * csize.Z + (x - node_min.X); //////obviously just temporary
 372                         if (y < ridge_heightmap[j])
 373                                 ridge_heightmap[j] = y - 1;
 374
 375                         vm->m_data[vi] = n_air;
 376                 }
 377         }
 378 }
 379
 380 /*
 381 void MapgenV7::testBiomes() {
 382         u32 index = 0;
 383
 384         for (s16 z = node_min.Z; z <= node_min.Z; z++)
 385         for (s16 x = node_min.X; x <= node_min.X; x++) {;
 386                 Biome *b = bmgr->getBiome(heat, humidity, 0);
 387         }
 388         // make an 80x80 grid with axes heat/humidity as a voroni diagram for biomes
 389         // clear out y space for it first with air
 390         // use absolute positioning, each chunk will be a +1 height
 391 }*/
 392
 393
 394 void MapgenV7::addTopNodes() {
 395         v3s16 em = vm->m_area.getExtent();
 396         s16 ntopnodes;
 397         u32 index = 0;
 398
 399         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 400         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 401                 // First, add top nodes below the ridge
 402                 s16 y = ridge_heightmap[index];
 403
 404                 // This cutoff is good enough, but not perfect.
 405                 // It will cut off potentially placed top nodes at chunk boundaries
 406                 if (y < node_min.Y)
 407                         continue;
 408                 if (y > node_max.Y) {
 409                         y = node_max.Y; // Let's see if we can still go downward anyway
 410                         u32 vi = vm->m_area.index(x, y, z);
 411                         if (vm->m_data[vi].getContent() != CONTENT_AIR)
 412                                 continue;
 413                 }
 414
 415                 // N.B.  It is necessary to search downward since range_heightmap[i]
 416                 // might not be the actual height, just the lowest part in the chunk
 417                 // where a ridge had been carved
 418                 u32 i = vm->m_area.index(x, y, z);
 419                 for (; y >= node_min.Y; y--) {
 420                         if (vm->m_data[i].getContent() != CONTENT_AIR)
 421                                 break;
 422                         vm->m_area.add_y(em, i, -1);
 423                 }
 424
 425                 Biome *biome = bmgr->biomes[biomemap[index]];
 426
 427                 if (y != node_min.Y - 1) {
 428                         ridge_heightmap[index] = y; //update ridgeheight
 429                         ntopnodes = biome->top_depth;
 430                         for (; y <= node_max.Y && ntopnodes; y++) {
 431                                 ntopnodes--;
 432                                 vm->m_data[i] = MapNode(biome->c_top);
 433                                 vm->m_area.add_y(em, i, 1);
 434                         }
 435                         //heightmap[index] = y;
 436                 }
 437
 438                 // Now, add top nodes on top of the ridge
 439                 y = heightmap[index];
 440
 441                 i = vm->m_area.index(x, y, z);
 442                 for (; y >= node_min.Y; y--) {
 443                         if (vm->m_data[i].getContent() != CONTENT_AIR)
 444                                 break;
 445                         vm->m_area.add_y(em, i, -1);
 446                 }
 447
 448                 if (y != node_min.Y - 1) {
 449                         ntopnodes = biome->top_depth;
 450                         // Let's see if we've already added it...
 451                         if (y == ridge_heightmap[index] + ntopnodes - 1)
 452                                 continue;
 453
 454                         for (; y <= node_max.Y && ntopnodes; y++) {
 455                                 ntopnodes--;
 456                                 vm->m_data[i] = MapNode(biome->c_top);
 457                                 vm->m_area.add_y(em, i, 1);
 458                         }
 459                 }
 460         }
 461 }
 462
 463
 464 void MapgenV7::growGrass() {
 465         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 466         for (s16 x = node_min.X; x <= node_max.X; x++) {
 467                 // Find the lowest surface to which enough light ends up to make
 468                 // grass grow.  Basically just wait until not air and not leaves.
 469                 s16 surface_y = 0;
 470                 {
 471                         v3s16 em = vm->m_area.getExtent();
 472                         u32 i = vm->m_area.index(x, node_max.Y, z);
 473                         s16 y;
 474                         // Go to ground level
 475                         for (y = node_max.Y; y >= node_min.Y; y--) {
 476                                 MapNode &n = vm->m_data[i];
 477                                 if (ndef->get(n).param_type != CPT_LIGHT ||
 478                                         ndef->get(n).liquid_type != LIQUID_NONE)
 479                                         break;
 480                                 vm->m_area.add_y(em, i, -1);
 481                         }
 482                         surface_y = (y >= node_min.Y) ? y : node_min.Y;
 483                 }
 484
 485                 u32 i = vm->m_area.index(x, surface_y, z);
 486                 MapNode *n = &vm->m_data[i];
 487                 if (n->getContent() == c_dirt && surface_y >= water_level - 20)
 488                         n->setContent(c_dirt_with_grass);
 489         }
 490 }