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         : Mapgen(mapgenid, params, emerge)
  52 {
  53         this->emerge = emerge;
  54         this->bmgr   = emerge->biomemgr;
  55
  56         // amount of elements to skip for the next index
  57         // for noise/height/biome maps (not vmanip)
  58         this->ystride = csize.X;
  59         this->zstride = csize.X * (csize.Y + 2);
  60
  61         this->biomemap  = new u8[csize.X * csize.Z];
  62         this->heightmap = new s16[csize.X * csize.Z];
  63
  64         MapgenV5Params *sp = (MapgenV5Params *)params->sparams;
  65         this->spflags      = sp->spflags;
  66
  67         // Terrain noise
  68         noise_filler_depth = new Noise(&sp->np_filler_depth, seed, csize.X, csize.Z);
  69         noise_factor       = new Noise(&sp->np_factor,       seed, csize.X, csize.Z);
  70         noise_height       = new Noise(&sp->np_height,       seed, csize.X, csize.Z);
  71
  72         // 3D terrain noise
  73         noise_cave1        = new Noise(&sp->np_cave1,   seed, csize.X, csize.Y + 2, csize.Z);
  74         noise_cave2        = new Noise(&sp->np_cave2,   seed, csize.X, csize.Y + 2, csize.Z);
  75         noise_ground       = new Noise(&sp->np_ground,  seed, csize.X, csize.Y + 2, csize.Z);
  76         noise_crumble      = new Noise(&sp->np_crumble, seed, csize.X, csize.Y + 2, csize.Z);
  77         noise_wetness      = new Noise(&sp->np_wetness, seed, csize.X, csize.Y + 2, csize.Z);
  78
  79         // Biome noise
  80         noise_heat         = new Noise(bmgr->np_heat,     seed, csize.X, csize.Z);
  81         noise_humidity     = new Noise(bmgr->np_humidity, seed, csize.X, csize.Z);
  82
  83         //// Resolve nodes to be used
  84         INodeDefManager *ndef = emerge->ndef;
  85
  86         c_stone           = ndef->getId("mapgen_stone");
  87         c_dirt            = ndef->getId("mapgen_dirt");
  88         c_dirt_with_grass = ndef->getId("mapgen_dirt_with_grass");
  89         c_sand            = ndef->getId("mapgen_sand");
  90         c_water_source    = ndef->getId("mapgen_water_source");
  91         c_lava_source     = ndef->getId("mapgen_lava_source");
  92         c_gravel          = ndef->getId("mapgen_gravel");
  93         c_cobble          = ndef->getId("mapgen_cobble");
  94         c_ice             = ndef->getId("default:ice");
  95         c_mossycobble     = ndef->getId("mapgen_mossycobble");
  96         c_sandbrick       = ndef->getId("mapgen_sandstonebrick");
  97         c_stair_cobble    = ndef->getId("mapgen_stair_cobble");
  98         c_stair_sandstone = ndef->getId("mapgen_stair_sandstone");
  99         if (c_ice == CONTENT_IGNORE)
 100                 c_ice = CONTENT_AIR;
 101         if (c_mossycobble == CONTENT_IGNORE)
 102                 c_mossycobble = c_cobble;
 103         if (c_sandbrick == CONTENT_IGNORE)
 104                 c_sandbrick = c_desert_stone;
 105         if (c_stair_cobble == CONTENT_IGNORE)
 106                 c_stair_cobble = c_cobble;
 107         if (c_stair_sandstone == CONTENT_IGNORE)
 108                 c_stair_sandstone = c_sandbrick;
 109 }
 110
 111
 112 MapgenV5::~MapgenV5() {
 113         delete noise_filler_depth;
 114         delete noise_factor;
 115         delete noise_height;
 116         delete noise_cave1;
 117         delete noise_cave2;
 118         delete noise_ground;
 119         delete noise_crumble;
 120         delete noise_wetness;
 121
 122         delete noise_heat;
 123         delete noise_humidity;
 124
 125         delete[] heightmap;
 126         delete[] biomemap;
 127 }
 128
 129
 130 MapgenV5Params::MapgenV5Params() {
 131         spflags = MGV5_BLOBS;
 132
 133         np_filler_depth = NoiseParams(0, 1,  v3f(150, 150, 150), 261,    4, 0.7);
 134         np_factor       = NoiseParams(0, 1,  v3f(250, 250, 250), 920381, 3, 0.45);
 135         np_height       = NoiseParams(0, 10, v3f(250, 250, 250), 84174,  4, 0.5);
 136         np_cave1        = NoiseParams(0, 6,  v3f(50,  50,  50),  52534,  4, 0.5);
 137         np_cave2        = NoiseParams(0, 6,  v3f(50,  50,  50),  10325,  4, 0.5);
 138         np_ground       = NoiseParams(0, 40, v3f(80,  80,  80),  983240, 4, 0.55);
 139         np_crumble      = NoiseParams(0, 1,  v3f(20,  20,  20),  34413,  3, 1.3);
 140         np_wetness      = NoiseParams(0, 1,  v3f(40,  40,  40),  32474,  4, 1.1);
 141 }
 142
 143
 144 // Current caves noise scale default is 6 to compensate for new eased 3d noise amplitude
 145
 146 // Scaling the output of the noise function affects the overdrive of the
 147 // contour function, which affects the shape of the output considerably.
 148
 149 //#define CAVE_NOISE_SCALE 12.0 < original default
 150 //#define CAVE_NOISE_SCALE 10.0
 151 //#define CAVE_NOISE_SCALE 7.5
 152 //#define CAVE_NOISE_SCALE 5.0
 153 //#define CAVE_NOISE_SCALE 1.0
 154
 155 //#define CAVE_NOISE_THRESHOLD (2.5/CAVE_NOISE_SCALE)
 156 //#define CAVE_NOISE_THRESHOLD (1.5/CAVE_NOISE_SCALE) < original and current code
 157
 158
 159 void MapgenV5Params::readParams(Settings *settings) {
 160         settings->getFlagStrNoEx("mgv5_spflags", spflags, flagdesc_mapgen_v5);
 161
 162         settings->getNoiseParams("mgv5_np_filler_depth", np_filler_depth);
 163         settings->getNoiseParams("mgv5_np_factor",       np_factor);
 164         settings->getNoiseParams("mgv5_np_height",       np_height);
 165         settings->getNoiseParams("mgv5_np_cave1",        np_cave1);
 166         settings->getNoiseParams("mgv5_np_cave2",        np_cave2);
 167         settings->getNoiseParams("mgv5_np_ground",       np_ground);
 168         settings->getNoiseParams("mgv5_np_crumble",      np_crumble);
 169         settings->getNoiseParams("mgv5_np_wetness",      np_wetness);
 170 }
 171
 172
 173 void MapgenV5Params::writeParams(Settings *settings) {
 174         settings->setFlagStr("mgv5_spflags", spflags, flagdesc_mapgen_v5, (u32)-1);
 175
 176         settings->setNoiseParams("mgv5_np_filler_depth", np_filler_depth);
 177         settings->setNoiseParams("mgv5_np_factor",       np_factor);
 178         settings->setNoiseParams("mgv5_np_height",       np_height);
 179         settings->setNoiseParams("mgv5_np_cave1",        np_cave1);
 180         settings->setNoiseParams("mgv5_np_cave2",        np_cave2);
 181         settings->setNoiseParams("mgv5_np_ground",       np_ground);
 182         settings->setNoiseParams("mgv5_np_crumble",      np_crumble);
 183         settings->setNoiseParams("mgv5_np_wetness",      np_wetness);
 184 }
 185
 186
 187 int MapgenV5::getGroundLevelAtPoint(v2s16 p) {
 188         //TimeTaker t("getGroundLevelAtPoint", NULL, PRECISION_MICRO);
 189
 190         float f = 0.55 + NoisePerlin2D(noise_factor->np, p.X, p.Y, seed);
 191         if(f < 0.01)
 192                 f = 0.01;
 193         else if(f >= 1.0)
 194                 f *= 1.6;
 195         float h = water_level + NoisePerlin2D(noise_height->np, p.X, p.Y, seed);
 196
 197         s16 search_top = water_level + 15;
 198         s16 search_base = water_level;
 199         // Use these 2 lines instead for a slower search returning highest ground level
 200         //s16 search_top = h + f * noise_ground->np->octaves * noise_ground->np->scale;
 201         //s16 search_base = h - f * noise_ground->np->octaves * noise_ground->np->scale;
 202
 203         s16 level = -31000;
 204         for (s16 y = search_top; y >= search_base; y--) {
 205                 float n_ground = NoisePerlin3DEased(noise_ground->np, p.X, y, p.Y, seed);
 206                 if(n_ground * f > y - h) {
 207                         if(y >= search_top - 7)
 208                                 break;
 209                         else
 210                                 level = y;
 211                                 break;
 212                 }
 213         }
 214
 215         //printf("getGroundLevelAtPoint: %dus\n", t.stop());
 216         return level;
 217 }
 218
 219
 220 void MapgenV5::makeChunk(BlockMakeData *data) {
 221         assert(data->vmanip);
 222         assert(data->nodedef);
 223         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 224                 data->blockpos_requested.Y >= data->blockpos_min.Y &&
 225                 data->blockpos_requested.Z >= data->blockpos_min.Z);
 226         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 227                 data->blockpos_requested.Y <= data->blockpos_max.Y &&
 228                 data->blockpos_requested.Z <= data->blockpos_max.Z);
 229
 230         generating = true;
 231         vm   = data->vmanip;
 232         ndef = data->nodedef;
 233         //TimeTaker t("makeChunk");
 234
 235         v3s16 blockpos_min = data->blockpos_min;
 236         v3s16 blockpos_max = data->blockpos_max;
 237         node_min = blockpos_min * MAP_BLOCKSIZE;
 238         node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 239         full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
 240         full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 241
 242         // Create a block-specific seed
 243         blockseed = emerge->getBlockSeed(full_node_min);  //////use getBlockSeed2()!
 244
 245         // Make some noise
 246         calculateNoise();
 247
 248         // Generate base terrain
 249         generateBaseTerrain();
 250         updateHeightmap(node_min, node_max);
 251
 252         // Generate underground dirt, sand, gravel and lava blobs
 253         if (spflags & MGV5_BLOBS) {
 254                 generateBlobs();
 255         }
 256
 257         // Calculate biomes
 258         bmgr->calcBiomes(csize.X, csize.Z, noise_heat->result,
 259                 noise_humidity->result, heightmap, biomemap);
 260
 261         // Actually place the biome-specific nodes
 262         generateBiomes();
 263
 264         // Generate dungeons and desert temples
 265         if (flags & MG_DUNGEONS) {
 266                 DungeonGen dgen(this, NULL);
 267                 dgen.generate(blockseed, full_node_min, full_node_max);
 268         }
 269
 270         // Generate the registered decorations
 271         emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
 272
 273         // Generate the registered ores
 274         emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
 275
 276         // Sprinkle some dust on top after everything else was generated
 277         dustTopNodes();
 278
 279         //printf("makeChunk: %dms\n", t.stop());
 280
 281         // Add top and bottom side of water to transforming_liquid queue
 282         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 283
 284         // Calculate lighting
 285         if (flags & MG_LIGHT)
 286                 calcLighting(node_min - v3s16(0, 1, 0) - v3s16(1, 0, 1) * MAP_BLOCKSIZE,
 287                         node_max + v3s16(0, 1, 0) + v3s16(1, 0, 1) * MAP_BLOCKSIZE);
 288
 289         this->generating = false;
 290 }
 291
 292
 293 void MapgenV5::calculateNoise() {
 294         //TimeTaker t("calculateNoise", NULL, PRECISION_MICRO);
 295         int x = node_min.X;
 296         int y = node_min.Y - 1;
 297         int z = node_min.Z;
 298
 299         noise_filler_depth->perlinMap2D(x, z);
 300         noise_factor->perlinMap2D(x, z);
 301         noise_height->perlinMap2D(x, z);
 302         noise_height->transformNoiseMap();
 303
 304         noise_cave1->perlinMap3D(x, y, z, true);
 305         noise_cave1->transformNoiseMap();
 306         noise_cave2->perlinMap3D(x, y, z, true);
 307         noise_cave2->transformNoiseMap();
 308         noise_ground->perlinMap3D(x, y, z, true);
 309         noise_ground->transformNoiseMap();
 310
 311         if (spflags & MGV5_BLOBS) {
 312                 noise_crumble->perlinMap3D(x, y, z, true);
 313                 noise_wetness->perlinMap3D(x, y, z, false);
 314         }
 315
 316         noise_heat->perlinMap2D(x, z);
 317         noise_humidity->perlinMap2D(x, z);
 318
 319         //printf("calculateNoise: %dus\n", t.stop());
 320 }
 321
 322
 323 //bool is_cave(u32 index) {
 324 //      double d1 = contour(noise_cave1->result[index]);
 325 //      double d2 = contour(noise_cave2->result[index]);
 326 //      return d1*d2 > CAVE_NOISE_THRESHOLD;
 327 //}
 328
 329
 330 //bool val_is_ground(v3s16 p, u32 index, u32 index2d) {
 331 //      double f = 0.55 + noise_factor->result[index2d];
 332 //      if(f < 0.01)
 333 //              f = 0.01;
 334 //      else if(f >= 1.0)
 335 //              f *= 1.6;
 336 //      double h = WATER_LEVEL + 10 * noise_height->result[index2d];
 337 //      return (noise_ground->result[index] * f > (double)p.Y - h);
 338 //}
 339
 340
 341 // Make base ground level
 342 void MapgenV5::generateBaseTerrain() {
 343         u32 index = 0;
 344         u32 index2d = 0;
 345
 346         for(s16 z=node_min.Z; z<=node_max.Z; z++) {
 347                 for(s16 y=node_min.Y - 1; y<=node_max.Y + 1; y++) {
 348                         u32 i = vm->m_area.index(node_min.X, y, z);
 349                         for(s16 x=node_min.X; x<=node_max.X; x++, i++, index++, index2d++) {
 350                                 if(vm->m_data[i].getContent() != CONTENT_IGNORE)
 351                                         continue;
 352
 353                                 float f = 0.55 + noise_factor->result[index2d];
 354                                 if(f < 0.01)
 355                                         f = 0.01;
 356                                 else if(f >= 1.0)
 357                                         f *= 1.6;
 358                                 float h = water_level + noise_height->result[index2d];
 359                                 float d1 = contour(noise_cave1->result[index]);
 360                                 float d2 = contour(noise_cave2->result[index]);
 361
 362                                 if(noise_ground->result[index] * f < y - h) {
 363                                         if(y <= water_level)
 364                                                 vm->m_data[i] = MapNode(c_water_source);
 365                                         else
 366                                                 vm->m_data[i] = MapNode(CONTENT_AIR);
 367                                 } else if(d1*d2 > 0.2) {
 368                                         vm->m_data[i] = MapNode(CONTENT_AIR);
 369                                 } else {
 370                                         vm->m_data[i] = MapNode(c_stone);
 371                                 }
 372                         }
 373                         index2d = index2d - ystride;
 374                 }
 375                 index2d = index2d + ystride;
 376         }
 377 }
 378
 379
 380 // Add mud and sand and others underground (in place of stone)
 381 void MapgenV5::generateBlobs() {
 382         u32 index = 0;
 383
 384         for(s16 z=node_min.Z; z<=node_max.Z; z++) {
 385                 for(s16 y=node_min.Y - 1; y<=node_max.Y + 1; y++) {
 386                         u32 i = vm->m_area.index(node_min.X, y, z);
 387                         for(s16 x=node_min.X; x<=node_max.X; x++, i++, index++) {
 388                                 content_t c = vm->m_data[i].getContent();
 389                                 if(c != c_stone)
 390                                         continue;
 391
 392                                 if(noise_crumble->result[index] > 1.3) {
 393                                         if(noise_wetness->result[index] > 0.0)
 394                                                 vm->m_data[i] = MapNode(c_dirt);
 395                                         else
 396                                                 vm->m_data[i] = MapNode(c_sand);
 397                                 } else if(noise_crumble->result[index] > 0.7) {
 398                                         if(noise_wetness->result[index] < -0.6)
 399                                                 vm->m_data[i] = MapNode(c_gravel);
 400                                 } else if(noise_crumble->result[index] < -3.5 +
 401                                                 MYMIN(0.1 *
 402                                                 sqrt((float)MYMAX(0, -y)), 1.5)) {
 403                                         vm->m_data[i] = MapNode(c_lava_source);
 404                                 }
 405                         }
 406                 }
 407         }
 408 }
 409
 410
 411 void MapgenV5::generateBiomes() {
 412         if (node_max.Y < water_level)
 413                 return;
 414
 415         MapNode n_air(CONTENT_AIR);
 416         MapNode n_stone(c_stone);
 417         MapNode n_water(c_water_source);
 418
 419         v3s16 em = vm->m_area.getExtent();
 420         u32 index = 0;
 421
 422         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 423         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 424                 Biome *biome  = (Biome *)bmgr->get(biomemap[index]);
 425                 s16 dfiller   = biome->depth_filler + noise_filler_depth->result[index];
 426                 s16 y0_top    = biome->depth_top;
 427                 s16 y0_filler = biome->depth_top + dfiller;
 428
 429                 s16 nplaced = 0;
 430                 u32 i = vm->m_area.index(x, node_max.Y, z);
 431
 432                 content_t c_above = vm->m_data[i + em.X].getContent();
 433                 bool have_air = c_above == CONTENT_AIR;
 434
 435                 for (s16 y = node_max.Y; y >= node_min.Y; y--) {
 436                         content_t c = vm->m_data[i].getContent();
 437                         bool is_replaceable_content =
 438                                 c == c_stone || c == c_dirt_with_grass || c == c_dirt ||
 439                                 c == c_sand  || c == c_lava_source     || c == c_gravel;
 440
 441                         if (is_replaceable_content && have_air) {
 442                                 content_t c_below = vm->m_data[i - em.X].getContent();
 443
 444                                 if (c_below != CONTENT_AIR) {
 445                                         if (nplaced < y0_top) {
 446                                                 if(y < water_level)
 447                                                         vm->m_data[i] = MapNode(biome->c_filler);
 448                                                 else
 449                                                         vm->m_data[i] = MapNode(biome->c_top);
 450                                                 nplaced++;
 451                                         } else if (nplaced < y0_filler && nplaced >= y0_top) {
 452                                                 vm->m_data[i] = MapNode(biome->c_filler);
 453                                                 nplaced++;
 454                                         } else if (c == c_stone) {
 455                                                 have_air = false;
 456                                                 nplaced  = 0;
 457                                                 vm->m_data[i] = MapNode(biome->c_stone);
 458                                         } else {
 459                                                 have_air = false;
 460                                                 nplaced  = 0;
 461                                         }
 462                                 } else if (c == c_stone) {
 463                                         have_air = false;
 464                                         nplaced = 0;
 465                                         vm->m_data[i] = MapNode(biome->c_stone);
 466                                 }
 467                         } else if (c == c_stone) {
 468                                 have_air = false;
 469                                 nplaced = 0;
 470                                 vm->m_data[i] = MapNode(biome->c_stone);
 471                         } else if (c == c_water_source) {
 472                                 have_air = true;
 473                                 nplaced = 0;
 474                                 vm->m_data[i] = MapNode(biome->c_water);
 475                         } else if (c == CONTENT_AIR) {
 476                                 have_air = true;
 477                                 nplaced = 0;
 478                         }
 479
 480                         vm->m_area.add_y(em, i, -1);
 481                 }
 482         }
 483 }
 484
 485 void MapgenV5::dustTopNodes() {
 486         v3s16 em = vm->m_area.getExtent();
 487         u32 index = 0;
 488
 489         if (water_level > node_max.Y)
 490                 return;
 491
 492         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 493         for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
 494                 Biome *biome = (Biome *)bmgr->get(biomemap[index]);
 495
 496                 if (biome->c_dust == CONTENT_IGNORE)
 497                         continue;
 498
 499                 s16 y = node_max.Y + 1;
 500                 u32 vi = vm->m_area.index(x, y, z);
 501                 for (; y >= node_min.Y; y--) {
 502                         if (vm->m_data[vi].getContent() != CONTENT_AIR)
 503                                 break;
 504
 505                         vm->m_area.add_y(em, vi, -1);
 506                 }
 507
 508                 content_t c = vm->m_data[vi].getContent();
 509                 if (c == biome->c_water && biome->c_dust_water != CONTENT_IGNORE) {
 510                         if (y < node_min.Y - 1)
 511                                 continue;
 512
 513                         vm->m_data[vi] = MapNode(biome->c_dust_water);
 514                 } else if (!ndef->get(c).buildable_to && c != CONTENT_IGNORE
 515                                 && c != biome->c_dust) {
 516                         if (y == node_max.Y + 1)
 517                                 continue;
 518
 519                         vm->m_area.add_y(em, vi, 1);
 520                         vm->m_data[vi] = MapNode(biome->c_dust);
 521                 }
 522         }
 523 }
 524