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->biomemgr;
  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         bmgr->calcBiomes(csize.X, csize.Z, noise_heat->result,
 234                 noise_humidity->result, heightmap, biomemap);
 235
 236         // Actually place the biome-specific nodes
 237         generateBiomes();
 238
 239         // Generate dungeons and desert temples
 240         if (flags & MG_DUNGEONS) {
 241                 DungeonGen dgen(this, NULL);
 242                 dgen.generate(blockseed, full_node_min, full_node_max);
 243         }
 244
 245         // Generate the registered decorations
 246         emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
 247
 248         // Generate the registered ores
 249         emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
 250
 251         // Sprinkle some dust on top after everything else was generated
 252         dustTopNodes();
 253
 254         //printf("makeChunk: %dms\n", t.stop());
 255
 256         // Add top and bottom side of water to transforming_liquid queue
 257         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 258
 259         // Calculate lighting
 260         if (flags & MG_LIGHT)
 261                 calcLighting(node_min - v3s16(1, 0, 1) * MAP_BLOCKSIZE,
 262                                          node_max + v3s16(1, 0, 1) * MAP_BLOCKSIZE);
 263
 264         this->generating = false;
 265 }
 266
 267
 268 void MapgenV5::calculateNoise() {
 269         //TimeTaker t("calculateNoise", NULL, PRECISION_MICRO);
 270         int x = node_min.X;
 271         int y = node_min.Y;
 272         int z = node_min.Z;
 273
 274         noise_filler_depth->perlinMap2D(x, z);
 275         noise_factor->perlinMap2D(x, z);
 276         noise_height->perlinMap2D(x, z);
 277         noise_height->transformNoiseMap();
 278
 279         noise_cave1->perlinMap3D(x, y, z, true);
 280         noise_cave1->transformNoiseMap();
 281         noise_cave2->perlinMap3D(x, y, z, true);
 282         noise_cave2->transformNoiseMap();
 283         noise_ground->perlinMap3D(x, y, z, true);
 284         noise_ground->transformNoiseMap();
 285
 286         if (spflags & MGV5_BLOBS) {
 287                 noise_crumble->perlinMap3D(x, y, z, true);
 288                 noise_wetness->perlinMap3D(x, y, z, false);
 289         }
 290
 291         noise_heat->perlinMap2D(x, z);
 292         noise_humidity->perlinMap2D(x, z);
 293
 294         //printf("calculateNoise: %dus\n", t.stop());
 295 }
 296
 297
 298 //bool is_cave(u32 index) {
 299 //      double d1 = contour(noise_cave1->result[index]);
 300 //      double d2 = contour(noise_cave2->result[index]);
 301 //      return d1*d2 > CAVE_NOISE_THRESHOLD;
 302 //}
 303
 304
 305 //bool val_is_ground(v3s16 p, u32 index, u32 index2d) {
 306 //      double f = 0.55 + noise_factor->result[index2d];
 307 //      if(f < 0.01)
 308 //              f = 0.01;
 309 //      else if(f >= 1.0)
 310 //              f *= 1.6;
 311 //      double h = WATER_LEVEL + 10 * noise_height->result[index2d];
 312 //      return (noise_ground->result[index] * f > (double)p.Y - h);
 313 //}
 314
 315
 316 // Make base ground level
 317 void MapgenV5::generateBaseTerrain() {
 318         u32 index = 0;
 319         u32 index2d = 0;
 320
 321         for(s16 z=node_min.Z; z<=node_max.Z; z++) {
 322                 for(s16 y=node_min.Y; y<=node_max.Y; y++) {
 323                         u32 i = vm->m_area.index(node_min.X, y, z);
 324                         for(s16 x=node_min.X; x<=node_max.X; x++, i++, index++, index2d++) {
 325                                 if(vm->m_data[i].getContent() != CONTENT_IGNORE)
 326                                         continue;
 327
 328                                 float f = 0.55 + noise_factor->result[index2d];
 329                                 if(f < 0.01)
 330                                         f = 0.01;
 331                                 else if(f >= 1.0)
 332                                         f *= 1.6;
 333                                 float h = water_level + noise_height->result[index2d];
 334                                 float d1 = contour(noise_cave1->result[index]);
 335                                 float d2 = contour(noise_cave2->result[index]);
 336                                 if(noise_ground->result[index] * f < y - h) {
 337                                         if(y <= water_level)
 338                                                 vm->m_data[i] = MapNode(c_water_source);
 339                                         else
 340                                                 vm->m_data[i] = MapNode(CONTENT_AIR);
 341                                 } else if(d1*d2 > 0.2) {
 342                                         vm->m_data[i] = MapNode(CONTENT_AIR);
 343                                 } else {
 344                                         vm->m_data[i] = MapNode(c_stone);
 345                                 }
 346                         }
 347                         index2d = index2d - ystride;
 348                 }
 349                 index2d = index2d + ystride;
 350         }
 351 }
 352
 353
 354 // Add mud and sand and others underground (in place of stone)
 355 void MapgenV5::generateBlobs() {
 356         u32 index = 0;
 357
 358         for(s16 z=node_min.Z; z<=node_max.Z; z++) {
 359                 for(s16 y=node_min.Y; y<=node_max.Y; y++) {
 360                         u32 i = vm->m_area.index(node_min.X, y, z);
 361                         for(s16 x=node_min.X; x<=node_max.X; x++, i++, index++) {
 362                                 content_t c = vm->m_data[i].getContent();
 363                                 if(c != c_stone)
 364                                         continue;
 365
 366                                 if(noise_crumble->result[index] > 1.3) {
 367                                         if(noise_wetness->result[index] > 0.0)
 368                                                 vm->m_data[i] = MapNode(c_dirt);
 369                                         else
 370                                                 vm->m_data[i] = MapNode(c_sand);
 371                                 } else if(noise_crumble->result[index] > 0.7) {
 372                                         if(noise_wetness->result[index] < -0.6)
 373                                                 vm->m_data[i] = MapNode(c_gravel);
 374                                 } else if(noise_crumble->result[index] < -3.5 +
 375                                                 MYMIN(0.1 *
 376                                                 sqrt((float)MYMAX(0, -y)), 1.5)) {
 377                                         vm->m_data[i] = MapNode(c_lava_source);
 378                                 }
 379                         }
 380                 }
 381         }
 382 }
 383
 384
 385 void MapgenV5::generateBiomes() {
 386         if (node_max.Y < water_level)
 387                 return;
 388
 389         MapNode n_air(CONTENT_AIR);
 390         MapNode n_stone(c_stone);
 391         MapNode n_water(c_water_source);
 392
 393         v3s16 em = vm->m_area.getExtent();
 394         u32 index = 0;
 395
 396         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 397         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 398                 Biome *biome  = (Biome *)bmgr->get(biomemap[index]);
 399                 s16 dfiller   = biome->depth_filler + noise_filler_depth->result[index];
 400                 s16 y0_top    = biome->depth_top;
 401                 s16 y0_filler = biome->depth_filler + biome->depth_top + dfiller;
 402
 403                 s16 nplaced = 0;
 404                 u32 i = vm->m_area.index(x, node_max.Y, z);
 405
 406                 content_t c_above = vm->m_data[i + em.X].getContent();
 407                 bool have_air = c_above == CONTENT_AIR;
 408
 409                 for (s16 y = node_max.Y; y >= node_min.Y; y--) {
 410                         content_t c = vm->m_data[i].getContent();
 411                         bool is_replaceable_content =
 412                                 c == c_stone || c == c_dirt_with_grass || c == c_dirt ||
 413                                 c == c_sand  || c == c_lava_source     || c == c_gravel;
 414
 415                         if (is_replaceable_content && have_air) {
 416                                 content_t c_below = vm->m_data[i - em.X].getContent();
 417
 418                                 if (c_below != CONTENT_AIR) {
 419                                         if (nplaced < y0_top) {
 420                                                 // A hack to prevent dirt_with_grass from being
 421                                                 // placed below water.  TODO: fix later
 422                                                 content_t c_place = ((y < water_level) &&
 423                                                                 (biome->c_top ==
 424                                                                 c_dirt_with_grass)) ?
 425                                                                  c_dirt : biome->c_top;
 426
 427                                                 vm->m_data[i] = MapNode(c_place);
 428                                                 nplaced++;
 429                                         } else if (nplaced < y0_filler && nplaced >= y0_top) {
 430                                                 vm->m_data[i] = MapNode(biome->c_filler);
 431                                                 nplaced++;
 432                                         } else {
 433                                                 have_air = false;
 434                                                 nplaced  = 0;
 435                                         }
 436                                 }
 437                         } else if (c == c_water_source) {
 438                                 have_air = true;
 439                                 nplaced = 0;
 440                                 vm->m_data[i] = MapNode(biome->c_water);
 441                         } else if (c == CONTENT_AIR) {
 442                                 have_air = true;
 443                                 nplaced = 0;
 444                         }
 445
 446                         vm->m_area.add_y(em, i, -1);
 447                 }
 448         }
 449 }
 450
 451 void MapgenV5::dustTopNodes() {
 452         v3s16 em = vm->m_area.getExtent();
 453         u32 index = 0;
 454
 455         if (water_level > node_max.Y)
 456                 return;
 457
 458         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 459         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 460                 Biome *biome = (Biome *)bmgr->get(biomemap[index]);
 461
 462                 if (biome->c_dust == CONTENT_IGNORE)
 463                         continue;
 464
 465                 s16 y = node_max.Y;
 466                 u32 vi = vm->m_area.index(x, y, z);
 467                 for (; y >= node_min.Y; y--) {
 468                         if (vm->m_data[vi].getContent() != CONTENT_AIR)
 469                                 break;
 470
 471                         vm->m_area.add_y(em, vi, -1);
 472                 }
 473
 474                 content_t c = vm->m_data[vi].getContent();
 475                 if (c == biome->c_water && biome->c_dust_water != CONTENT_IGNORE) {
 476                         if (y < node_min.Y)
 477                                 continue;
 478
 479                         vm->m_data[vi] = MapNode(biome->c_dust_water);
 480                 } else if (!ndef->get(c).buildable_to && c != CONTENT_IGNORE) {
 481                         if (y == node_max.Y)
 482                                 continue;
 483
 484                         vm->m_area.add_y(em, vi, 1);
 485                         vm->m_data[vi] = MapNode(biome->c_dust);
 486                 }
 487         }
 488 }
 489