src/mapgen_v5.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 "content_sao.h"
  28 #include "nodedef.h"
  29 #include "voxelalgorithms.h"
  30 #include "profiler.h"
  31 #include "settings.h" // For g_settings
  32 #include "main.h" // For g_profiler
  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_v5.h"
  41 #include "util/directiontables.h"
  42
  43
  44 FlagDesc flagdesc_mapgen_v5[] = {
  45         {"blobs", MGV5_BLOBS},
  46         {NULL,         0}
  47 };
  48
  49
  50 MapgenV5::MapgenV5(int mapgenid, MapgenParams *params, EmergeManager *emerge_) {
  51         this->generating  = false;
  52         this->id     = mapgenid;
  53         this->emerge = emerge_;
  54         this->bmgr   = emerge->biomedef;
  55
  56         this->seed        = (int)params->seed;
  57         this->water_level = params->water_level;
  58         this->flags       = params->flags;
  59         this->gennotify   = emerge->gennotify;
  60
  61         this->csize   = v3s16(1, 1, 1) * params->chunksize * MAP_BLOCKSIZE;
  62
  63         // amount of elements to skip for the next index
  64         // for noise/height/biome maps (not vmanip)
  65         this->ystride = csize.X;
  66         this->zstride = csize.X * csize.Y;
  67
  68         this->biomemap  = new u8[csize.X * csize.Z];
  69         this->heightmap = new s16[csize.X * csize.Z];
  70
  71         MapgenV5Params *sp = (MapgenV5Params *)params->sparams;
  72
  73         this->spflags     = sp->spflags;
  74
  75         // Terrain noise
  76         noise_filler_depth = new Noise(&sp->np_filler_depth, seed, csize.X, csize.Z);
  77         noise_factor       = new Noise(&sp->np_factor,       seed, csize.X, csize.Z);
  78         noise_height       = new Noise(&sp->np_height,       seed, csize.X, csize.Z);
  79
  80         // 3D terrain noise
  81         noise_cave1        = new Noise(&sp->np_cave1,   seed, csize.X, csize.Y, csize.Z);
  82         noise_cave2        = new Noise(&sp->np_cave2,   seed, csize.X, csize.Y, csize.Z);
  83         noise_ground       = new Noise(&sp->np_ground,  seed, csize.X, csize.Y, csize.Z);
  84         noise_crumble      = new Noise(&sp->np_crumble, seed, csize.X, csize.Y, csize.Z);
  85         noise_wetness      = new Noise(&sp->np_wetness, seed, csize.X, csize.Y, csize.Z);
  86
  87         // Biome noise
  88         noise_heat         = new Noise(bmgr->np_heat,     seed, csize.X, csize.Z);
  89         noise_humidity     = new Noise(bmgr->np_humidity, seed, csize.X, csize.Z);
  90
  91         //// Resolve nodes to be used
  92         INodeDefManager *ndef = emerge->ndef;
  93
  94         c_stone           = ndef->getId("mapgen_stone");
  95         c_dirt            = ndef->getId("mapgen_dirt");
  96         c_dirt_with_grass = ndef->getId("mapgen_dirt_with_grass");
  97         c_sand            = ndef->getId("mapgen_sand");
  98         c_water_source    = ndef->getId("mapgen_water_source");
  99         c_lava_source     = ndef->getId("mapgen_lava_source");
 100         c_gravel          = ndef->getId("mapgen_gravel");
 101         c_cobble          = ndef->getId("mapgen_cobble");
 102         c_ice             = ndef->getId("default:ice");
 103         c_mossycobble     = ndef->getId("mapgen_mossycobble");
 104         c_sandbrick       = ndef->getId("mapgen_sandstonebrick");
 105         c_stair_cobble    = ndef->getId("mapgen_stair_cobble");
 106         c_stair_sandstone = ndef->getId("mapgen_stair_sandstone");
 107         if (c_ice == CONTENT_IGNORE)
 108                 c_ice = CONTENT_AIR;
 109         if (c_mossycobble == CONTENT_IGNORE)
 110                 c_mossycobble = c_cobble;
 111         if (c_sandbrick == CONTENT_IGNORE)
 112                 c_sandbrick = c_desert_stone;
 113         if (c_stair_cobble == CONTENT_IGNORE)
 114                 c_stair_cobble = c_cobble;
 115         if (c_stair_sandstone == CONTENT_IGNORE)
 116                 c_stair_sandstone = c_sandbrick;
 117 }
 118
 119
 120 MapgenV5::~MapgenV5() {
 121         delete noise_filler_depth;
 122         delete noise_factor;
 123         delete noise_height;
 124         delete noise_cave1;
 125         delete noise_cave2;
 126         delete noise_ground;
 127         delete noise_crumble;
 128         delete noise_wetness;
 129
 130         delete noise_heat;
 131         delete noise_humidity;
 132
 133         delete[] heightmap;
 134         delete[] biomemap;
 135 }
 136
 137
 138 MapgenV5Params::MapgenV5Params() {
 139         spflags = MGV5_BLOBS;
 140
 141         np_filler_depth = NoiseParams(0, 1,  v3f(150, 150, 150), 261,    4, 0.7);
 142         np_factor       = NoiseParams(0, 1,  v3f(250, 250, 250), 920381, 3, 0.45);
 143         np_height       = NoiseParams(0, 10, v3f(250, 250, 250), 84174,  4, 0.5);
 144         np_cave1        = NoiseParams(0, 6,  v3f(50,  50,  50),  52534,  4, 0.5);
 145         np_cave2        = NoiseParams(0, 6,  v3f(50,  50,  50),  10325,  4, 0.5);
 146         np_ground       = NoiseParams(0, 40, v3f(80,  80,  80),  983240, 4, 0.55);
 147         np_crumble      = NoiseParams(0, 1,  v3f(20,  20,  20),  34413,  3, 1.3);
 148         np_wetness      = NoiseParams(0, 1,  v3f(40,  40,  40),  32474,  4, 1.1);
 149 }
 150
 151
 152 // Current caves noise scale default is 6 to compensate for new eased 3d noise amplitude
 153
 154 // Scaling the output of the noise function affects the overdrive of the
 155 // contour function, which affects the shape of the output considerably.
 156
 157 //#define CAVE_NOISE_SCALE 12.0 < original default
 158 //#define CAVE_NOISE_SCALE 10.0
 159 //#define CAVE_NOISE_SCALE 7.5
 160 //#define CAVE_NOISE_SCALE 5.0
 161 //#define CAVE_NOISE_SCALE 1.0
 162
 163 //#define CAVE_NOISE_THRESHOLD (2.5/CAVE_NOISE_SCALE)
 164 //#define CAVE_NOISE_THRESHOLD (1.5/CAVE_NOISE_SCALE) < original and current code
 165
 166
 167 void MapgenV5Params::readParams(Settings *settings) {
 168         settings->getFlagStrNoEx("mgv5_spflags", spflags, flagdesc_mapgen_v5);
 169
 170         settings->getNoiseParams("mgv5_np_filler_depth", np_filler_depth);
 171         settings->getNoiseParams("mgv5_np_factor",       np_factor);
 172         settings->getNoiseParams("mgv5_np_height",       np_height);
 173         settings->getNoiseParams("mgv5_np_cave1",        np_cave1);
 174         settings->getNoiseParams("mgv5_np_cave2",        np_cave2);
 175         settings->getNoiseParams("mgv5_np_ground",       np_ground);
 176         settings->getNoiseParams("mgv5_np_crumble",      np_crumble);
 177         settings->getNoiseParams("mgv5_np_wetness",      np_wetness);
 178 }
 179
 180
 181 void MapgenV5Params::writeParams(Settings *settings) {
 182         settings->setFlagStr("mgv5_spflags", spflags, flagdesc_mapgen_v5, (u32)-1);
 183
 184         settings->setNoiseParams("mgv5_np_filler_depth", np_filler_depth);
 185         settings->setNoiseParams("mgv5_np_factor",       np_factor);
 186         settings->setNoiseParams("mgv5_np_height",       np_height);
 187         settings->setNoiseParams("mgv5_np_cave1",        np_cave1);
 188         settings->setNoiseParams("mgv5_np_cave2",        np_cave2);
 189         settings->setNoiseParams("mgv5_np_ground",       np_ground);
 190         settings->setNoiseParams("mgv5_np_crumble",      np_crumble);
 191         settings->setNoiseParams("mgv5_np_wetness",      np_wetness);
 192 }
 193
 194
 195 void MapgenV5::makeChunk(BlockMakeData *data) {
 196         assert(data->vmanip);
 197         assert(data->nodedef);
 198         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 199                    data->blockpos_requested.Y >= data->blockpos_min.Y &&
 200                    data->blockpos_requested.Z >= data->blockpos_min.Z);
 201         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 202                    data->blockpos_requested.Y <= data->blockpos_max.Y &&
 203                    data->blockpos_requested.Z <= data->blockpos_max.Z);
 204
 205         generating = true;
 206         vm   = data->vmanip;
 207         ndef = data->nodedef;
 208         //TimeTaker t("makeChunk");
 209
 210         v3s16 blockpos_min = data->blockpos_min;
 211         v3s16 blockpos_max = data->blockpos_max;
 212         node_min = blockpos_min * MAP_BLOCKSIZE;
 213         node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 214         full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
 215         full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 216
 217         // Create a block-specific seed
 218         blockseed = emerge->getBlockSeed(full_node_min);  //////use getBlockSeed2()!
 219
 220         // Make some noise
 221         calculateNoise();
 222
 223         // Generate base terrain
 224         generateBaseTerrain();
 225         updateHeightmap(node_min, node_max);
 226
 227         // Generate underground dirt, sand, gravel and lava blobs
 228         if (spflags & MGV5_BLOBS) {
 229                 generateBlobs();
 230         }
 231
 232         // Calculate biomes
 233         BiomeNoiseInput binput;
 234         binput.mapsize      = v2s16(csize.X, csize.Z);
 235         binput.heat_map     = noise_heat->result;
 236         binput.humidity_map = noise_humidity->result;
 237         binput.height_map   = heightmap;
 238         bmgr->calcBiomes(&binput, biomemap);
 239
 240         // Actually place the biome-specific nodes
 241         generateBiomes();
 242
 243         // Generate dungeons and desert temples
 244         if (flags & MG_DUNGEONS) {
 245                 DungeonGen dgen(this, NULL);
 246                 dgen.generate(blockseed, full_node_min, full_node_max);
 247         }
 248
 249         // Generate the registered decorations
 250         for (size_t i = 0; i != emerge->decorations.size(); i++) {
 251                 Decoration *deco = emerge->decorations[i];
 252                 deco->placeDeco(this, blockseed + i, node_min, node_max);
 253         }
 254
 255         // Generate the registered ores
 256         for (unsigned int i = 0; i != emerge->ores.size(); i++) {
 257                 Ore *ore = emerge->ores[i];
 258                 ore->placeOre(this, blockseed + i, node_min, node_max);
 259         }
 260
 261         // Sprinkle some dust on top after everything else was generated
 262         dustTopNodes();
 263
 264         //printf("makeChunk: %dms\n", t.stop());
 265
 266         // Add top and bottom side of water to transforming_liquid queue
 267         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 268
 269         // Calculate lighting
 270         if (flags & MG_LIGHT)
 271                 calcLighting(node_min - v3s16(1, 0, 1) * MAP_BLOCKSIZE,
 272                                          node_max + v3s16(1, 0, 1) * MAP_BLOCKSIZE);
 273
 274         this->generating = false;
 275 }
 276
 277
 278 void MapgenV5::calculateNoise() {
 279         //TimeTaker t("calculateNoise", NULL, PRECISION_MICRO);
 280         int x = node_min.X;
 281         int y = node_min.Y;
 282         int z = node_min.Z;
 283
 284         noise_filler_depth->perlinMap2D(x, z);
 285         noise_factor->perlinMap2D(x, z);
 286         noise_height->perlinMap2D(x, z);
 287         noise_height->transformNoiseMap();
 288
 289         noise_cave1->perlinMap3D(x, y, z, true);
 290         noise_cave1->transformNoiseMap();
 291         noise_cave2->perlinMap3D(x, y, z, true);
 292         noise_cave2->transformNoiseMap();
 293         noise_ground->perlinMap3D(x, y, z, true);
 294         noise_ground->transformNoiseMap();
 295
 296         if (spflags & MGV5_BLOBS) {
 297                 noise_crumble->perlinMap3D(x, y, z, true);
 298                 noise_wetness->perlinMap3D(x, y, z, false);
 299         }
 300
 301         noise_heat->perlinMap2D(x, z);
 302         noise_humidity->perlinMap2D(x, z);
 303
 304         //printf("calculateNoise: %dus\n", t.stop());
 305 }
 306
 307
 308 //bool is_cave(u32 index) {
 309 //      double d1 = contour(noise_cave1->result[index]);
 310 //      double d2 = contour(noise_cave2->result[index]);
 311 //      return d1*d2 > CAVE_NOISE_THRESHOLD;
 312 //}
 313
 314
 315 //bool val_is_ground(v3s16 p, u32 index, u32 index2d) {
 316 //      double f = 0.55 + noise_factor->result[index2d];
 317 //      if(f < 0.01)
 318 //              f = 0.01;
 319 //      else if(f >= 1.0)
 320 //              f *= 1.6;
 321 //      double h = WATER_LEVEL + 10 * noise_height->result[index2d];
 322 //      return (noise_ground->result[index] * f > (double)p.Y - h);
 323 //}
 324
 325
 326 // Make base ground level
 327 void MapgenV5::generateBaseTerrain() {
 328         u32 index = 0;
 329         u32 index2d = 0;
 330
 331         for(s16 z=node_min.Z; z<=node_max.Z; z++) {
 332                 for(s16 y=node_min.Y; y<=node_max.Y; y++) {
 333                         u32 i = vm->m_area.index(node_min.X, y, z);
 334                         for(s16 x=node_min.X; x<=node_max.X; x++, i++, index++, index2d++) {
 335                                 if(vm->m_data[i].getContent() != CONTENT_IGNORE)
 336                                         continue;
 337
 338                                 float f = 0.55 + noise_factor->result[index2d];
 339                                 if(f < 0.01)
 340                                         f = 0.01;
 341                                 else if(f >= 1.0)
 342                                         f *= 1.6;
 343                                 float h = water_level + noise_height->result[index2d];
 344                                 float d1 = contour(noise_cave1->result[index]);
 345                                 float d2 = contour(noise_cave2->result[index]);
 346                                 if(noise_ground->result[index] * f < y - h) {
 347                                         if(y <= water_level)
 348                                                 vm->m_data[i] = MapNode(c_water_source);
 349                                         else
 350                                                 vm->m_data[i] = MapNode(CONTENT_AIR);
 351                                 } else if(d1*d2 > 0.2) {
 352                                         vm->m_data[i] = MapNode(CONTENT_AIR);
 353                                 } else {
 354                                         vm->m_data[i] = MapNode(c_stone);
 355                                 }
 356                         }
 357                         index2d = index2d - ystride;
 358                 }
 359                 index2d = index2d + ystride;
 360         }
 361 }
 362
 363
 364 // Add mud and sand and others underground (in place of stone)
 365 void MapgenV5::generateBlobs() {
 366         u32 index = 0;
 367
 368         for(s16 z=node_min.Z; z<=node_max.Z; z++) {
 369                 for(s16 y=node_min.Y; y<=node_max.Y; y++) {
 370                         u32 i = vm->m_area.index(node_min.X, y, z);
 371                         for(s16 x=node_min.X; x<=node_max.X; x++, i++, index++) {
 372                                 content_t c = vm->m_data[i].getContent();
 373                                 if(c != c_stone)
 374                                         continue;
 375
 376                                 if(noise_crumble->result[index] > 1.3) {
 377                                         if(noise_wetness->result[index] > 0.0)
 378                                                 vm->m_data[i] = MapNode(c_dirt);
 379                                         else
 380                                                 vm->m_data[i] = MapNode(c_sand);
 381                                 } else if(noise_crumble->result[index] > 0.7) {
 382                                         if(noise_wetness->result[index] < -0.6)
 383                                                 vm->m_data[i] = MapNode(c_gravel);
 384                                 } else if(noise_crumble->result[index] < -3.5 +
 385                                                 MYMIN(0.1 *
 386                                                 sqrt((float)MYMAX(0, -y)), 1.5)) {
 387                                         vm->m_data[i] = MapNode(c_lava_source);
 388                                 }
 389                         }
 390                 }
 391         }
 392 }
 393
 394
 395 void MapgenV5::generateBiomes() {
 396         if (node_max.Y < water_level)
 397                 return;
 398
 399         MapNode n_air(CONTENT_AIR);
 400         MapNode n_stone(c_stone);
 401         MapNode n_water(c_water_source);
 402
 403         v3s16 em = vm->m_area.getExtent();
 404         u32 index = 0;
 405
 406         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 407         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 408                 Biome *biome  = bmgr->biomes[biomemap[index]];
 409                 s16 dfiller   = biome->depth_filler + noise_filler_depth->result[index];
 410                 s16 y0_top    = biome->depth_top;
 411                 s16 y0_filler = biome->depth_filler + biome->depth_top + dfiller;
 412
 413                 s16 nplaced = 0;
 414                 u32 i = vm->m_area.index(x, node_max.Y, z);
 415
 416                 content_t c_above = vm->m_data[i + em.X].getContent();
 417                 bool have_air = c_above == CONTENT_AIR;
 418
 419                 for (s16 y = node_max.Y; y >= node_min.Y; y--) {
 420                         content_t c = vm->m_data[i].getContent();
 421                         if ((c == c_stone || c == c_dirt_with_grass
 422                                         || c == c_dirt
 423                                         || c == c_sand
 424                                         || c == c_lava_source
 425                                         || c == c_gravel) && have_air) {
 426                                 content_t c_below = vm->m_data[i - em.X].getContent();
 427
 428                                 if (c_below != CONTENT_AIR) {
 429                                         if (nplaced < y0_top) {
 430                                                 // A hack to prevent dirt_with_grass from being
 431                                                 // placed below water.  TODO: fix later
 432                                                 content_t c_place = ((y < water_level) &&
 433                                                                 (biome->c_top ==
 434                                                                 c_dirt_with_grass)) ?
 435                                                                  c_dirt : biome->c_top;
 436
 437                                                 vm->m_data[i] = MapNode(c_place);
 438                                                 nplaced++;
 439                                         } else if (nplaced < y0_filler && nplaced >= y0_top) {
 440                                                 vm->m_data[i] = MapNode(biome->c_filler);
 441                                                 nplaced++;
 442                                         } else {
 443                                                 have_air = false;
 444                                                 nplaced  = 0;
 445                                         }
 446                                 }
 447                         } else if (c == c_water_source) {
 448                                 have_air = true;
 449                                 nplaced = 0;
 450                                 vm->m_data[i] = MapNode(biome->c_water);
 451                         } else if (c == CONTENT_AIR) {
 452                                 have_air = true;
 453                                 nplaced = 0;
 454                         }
 455
 456                         vm->m_area.add_y(em, i, -1);
 457                 }
 458         }
 459 }
 460
 461 void MapgenV5::dustTopNodes() {
 462         v3s16 em = vm->m_area.getExtent();
 463         u32 index = 0;
 464
 465         if (water_level > node_max.Y)
 466                 return;
 467
 468         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 469         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 470                 Biome *biome = bmgr->biomes[biomemap[index]];
 471
 472                 if (biome->c_dust == CONTENT_IGNORE)
 473                         continue;
 474
 475                 s16 y = node_max.Y;
 476                 u32 vi = vm->m_area.index(x, y, z);
 477                 for (; y >= node_min.Y; y--) {
 478                         if (vm->m_data[vi].getContent() != CONTENT_AIR)
 479                                 break;
 480
 481                         vm->m_area.add_y(em, vi, -1);
 482                 }
 483
 484                 content_t c = vm->m_data[vi].getContent();
 485                 if (c == biome->c_water && biome->c_dust_water != CONTENT_IGNORE) {
 486                         if (y < node_min.Y)
 487                                 continue;
 488
 489                         vm->m_data[vi] = MapNode(biome->c_dust_water);
 490                 } else if (!ndef->get(c).buildable_to && c != CONTENT_IGNORE) {
 491                         if (y == node_max.Y)
 492                                 continue;
 493
 494                         vm->m_area.add_y(em, vi, 1);
 495                         vm->m_data[vi] = MapNode(biome->c_dust);
 496                 }
 497         }
 498 }
 499