src/mapgen/mapgen_carpathian.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2017-2018 vlapsley, Vaughan Lapsley <vlapsley@gmail.com>
   4 Copyright (C) 2010-2018 paramat
   5 Copyright (C) 2010-2018 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU Lesser General Public License as published by
   9 the Free Software Foundation; either version 2.1 of the License, or
  10 (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU Lesser General Public License for more details.
  16
  17 You should have received a copy of the GNU Lesser General Public License along
  18 with this program; if not, write to the Free Software Foundation, Inc.,
  19 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20 */
  21
  22
  23 #include <cmath>
  24 #include "mapgen.h"
  25 #include "voxel.h"
  26 #include "noise.h"
  27 #include "mapblock.h"
  28 #include "mapnode.h"
  29 #include "map.h"
  30 #include "content_sao.h"
  31 #include "nodedef.h"
  32 #include "voxelalgorithms.h"
  33 //#include "profiler.h" // For TimeTaker
  34 #include "settings.h" // For g_settings
  35 #include "emerge.h"
  36 #include "dungeongen.h"
  37 #include "cavegen.h"
  38 #include "mg_biome.h"
  39 #include "mg_ore.h"
  40 #include "mg_decoration.h"
  41 #include "mapgen_carpathian.h"
  42
  43
  44 FlagDesc flagdesc_mapgen_carpathian[] = {
  45         {"caverns", MGCARPATHIAN_CAVERNS},
  46         {NULL,      0}
  47 };
  48
  49
  50 ///////////////////////////////////////////////////////////////////////////////
  51
  52
  53 MapgenCarpathian::MapgenCarpathian(
  54                 int mapgenid, MapgenCarpathianParams *params, EmergeManager *emerge)
  55         : MapgenBasic(mapgenid, params, emerge)
  56 {
  57         base_level       = params->base_level;
  58
  59         spflags          = params->spflags;
  60         cave_width       = params->cave_width;
  61         large_cave_depth = params->large_cave_depth;
  62         lava_depth       = params->lava_depth;
  63         cavern_limit     = params->cavern_limit;
  64         cavern_taper     = params->cavern_taper;
  65         cavern_threshold = params->cavern_threshold;
  66         dungeon_ymin     = params->dungeon_ymin;
  67         dungeon_ymax     = params->dungeon_ymax;
  68
  69         grad_wl = 1 - water_level;
  70
  71         //// 2D Terrain noise
  72         noise_filler_depth  = new Noise(&params->np_filler_depth,  seed, csize.X, csize.Z);
  73         noise_height1       = new Noise(&params->np_height1,       seed, csize.X, csize.Z);
  74         noise_height2       = new Noise(&params->np_height2,       seed, csize.X, csize.Z);
  75         noise_height3       = new Noise(&params->np_height3,       seed, csize.X, csize.Z);
  76         noise_height4       = new Noise(&params->np_height4,       seed, csize.X, csize.Z);
  77         noise_hills_terrain = new Noise(&params->np_hills_terrain, seed, csize.X, csize.Z);
  78         noise_ridge_terrain = new Noise(&params->np_ridge_terrain, seed, csize.X, csize.Z);
  79         noise_step_terrain  = new Noise(&params->np_step_terrain,  seed, csize.X, csize.Z);
  80         noise_hills         = new Noise(&params->np_hills,         seed, csize.X, csize.Z);
  81         noise_ridge_mnt     = new Noise(&params->np_ridge_mnt,     seed, csize.X, csize.Z);
  82         noise_step_mnt      = new Noise(&params->np_step_mnt,      seed, csize.X, csize.Z);
  83
  84         //// 3D terrain noise
  85         // 1 up 1 down overgeneration
  86         noise_mnt_var = new Noise(&params->np_mnt_var, seed, csize.X, csize.Y + 2, csize.Z);
  87
  88         //// Cave noise
  89         MapgenBasic::np_cave1  = params->np_cave1;
  90         MapgenBasic::np_cave2  = params->np_cave2;
  91         MapgenBasic::np_cavern = params->np_cavern;
  92 }
  93
  94
  95 MapgenCarpathian::~MapgenCarpathian()
  96 {
  97         delete noise_filler_depth;
  98         delete noise_height1;
  99         delete noise_height2;
 100         delete noise_height3;
 101         delete noise_height4;
 102         delete noise_hills_terrain;
 103         delete noise_ridge_terrain;
 104         delete noise_step_terrain;
 105         delete noise_hills;
 106         delete noise_ridge_mnt;
 107         delete noise_step_mnt;
 108         delete noise_mnt_var;
 109 }
 110
 111
 112 MapgenCarpathianParams::MapgenCarpathianParams():
 113         np_filler_depth  (0,  1,  v3f(128,  128,  128),  261,   3, 0.7,  2.0),
 114         np_height1       (0,  5,  v3f(251,  251,  251),  9613,  5, 0.5,  2.0),
 115         np_height2       (0,  5,  v3f(383,  383,  383),  1949,  5, 0.5,  2.0),
 116         np_height3       (0,  5,  v3f(509,  509,  509),  3211,  5, 0.5,  2.0),
 117         np_height4       (0,  5,  v3f(631,  631,  631),  1583,  5, 0.5,  2.0),
 118         np_hills_terrain (1,  1,  v3f(1301, 1301, 1301), 1692,  5, 0.5,  2.0),
 119         np_ridge_terrain (1,  1,  v3f(1889, 1889, 1889), 3568,  5, 0.5,  2.0),
 120         np_step_terrain  (1,  1,  v3f(1889, 1889, 1889), 4157,  5, 0.5,  2.0),
 121         np_hills         (0,  3,  v3f(257,  257,  257),  6604,  6, 0.5,  2.0),
 122         np_ridge_mnt     (0,  12, v3f(743,  743,  743),  5520,  6, 0.7,  2.0),
 123         np_step_mnt      (0,  8,  v3f(509,  509,  509),  2590,  6, 0.6,  2.0),
 124         np_mnt_var       (0,  1,  v3f(499,  499,  499),  2490,  5, 0.55, 2.0),
 125         np_cave1         (0,  12, v3f(61,   61,   61),   52534, 3, 0.5,  2.0),
 126         np_cave2         (0,  12, v3f(67,   67,   67),   10325, 3, 0.5,  2.0),
 127         np_cavern        (0,  1,  v3f(384,  128,  384),  723,   5, 0.63, 2.0)
 128 {
 129 }
 130
 131
 132 void MapgenCarpathianParams::readParams(const Settings *settings)
 133 {
 134         settings->getFlagStrNoEx("mgcarpathian_spflags", spflags, flagdesc_mapgen_carpathian);
 135         settings->getFloatNoEx("mgcarpathian_base_level",       base_level);
 136         settings->getFloatNoEx("mgcarpathian_cave_width",       cave_width);
 137         settings->getS16NoEx("mgcarpathian_large_cave_depth",   large_cave_depth);
 138         settings->getS16NoEx("mgcarpathian_lava_depth",         lava_depth);
 139         settings->getS16NoEx("mgcarpathian_cavern_limit",       cavern_limit);
 140         settings->getS16NoEx("mgcarpathian_cavern_taper",       cavern_taper);
 141         settings->getFloatNoEx("mgcarpathian_cavern_threshold", cavern_threshold);
 142         settings->getS16NoEx("mgcarpathian_dungeon_ymin",       dungeon_ymin);
 143         settings->getS16NoEx("mgcarpathian_dungeon_ymax",       dungeon_ymax);
 144
 145         settings->getNoiseParams("mgcarpathian_np_filler_depth",  np_filler_depth);
 146         settings->getNoiseParams("mgcarpathian_np_height1",       np_height1);
 147         settings->getNoiseParams("mgcarpathian_np_height2",       np_height2);
 148         settings->getNoiseParams("mgcarpathian_np_height3",       np_height3);
 149         settings->getNoiseParams("mgcarpathian_np_height4",       np_height4);
 150         settings->getNoiseParams("mgcarpathian_np_hills_terrain", np_hills_terrain);
 151         settings->getNoiseParams("mgcarpathian_np_ridge_terrain", np_ridge_terrain);
 152         settings->getNoiseParams("mgcarpathian_np_step_terrain",  np_step_terrain);
 153         settings->getNoiseParams("mgcarpathian_np_hills",         np_hills);
 154         settings->getNoiseParams("mgcarpathian_np_ridge_mnt",     np_ridge_mnt);
 155         settings->getNoiseParams("mgcarpathian_np_step_mnt",      np_step_mnt);
 156         settings->getNoiseParams("mgcarpathian_np_mnt_var",       np_mnt_var);
 157         settings->getNoiseParams("mgcarpathian_np_cave1",         np_cave1);
 158         settings->getNoiseParams("mgcarpathian_np_cave2",         np_cave2);
 159         settings->getNoiseParams("mgcarpathian_np_cavern",        np_cavern);
 160 }
 161
 162
 163 void MapgenCarpathianParams::writeParams(Settings *settings) const
 164 {
 165         settings->setFlagStr("mgcarpathian_spflags", spflags, flagdesc_mapgen_carpathian, U32_MAX);
 166         settings->setFloat("mgcarpathian_base_level",       base_level);
 167         settings->setFloat("mgcarpathian_cave_width",       cave_width);
 168         settings->setS16("mgcarpathian_large_cave_depth",   large_cave_depth);
 169         settings->setS16("mgcarpathian_lava_depth",         lava_depth);
 170         settings->setS16("mgcarpathian_cavern_limit",       cavern_limit);
 171         settings->setS16("mgcarpathian_cavern_taper",       cavern_taper);
 172         settings->setFloat("mgcarpathian_cavern_threshold", cavern_threshold);
 173         settings->setS16("mgcarpathian_dungeon_ymin",       dungeon_ymin);
 174         settings->setS16("mgcarpathian_dungeon_ymax",       dungeon_ymax);
 175
 176         settings->setNoiseParams("mgcarpathian_np_filler_depth",  np_filler_depth);
 177         settings->setNoiseParams("mgcarpathian_np_height1",       np_height1);
 178         settings->setNoiseParams("mgcarpathian_np_height2",       np_height2);
 179         settings->setNoiseParams("mgcarpathian_np_height3",       np_height3);
 180         settings->setNoiseParams("mgcarpathian_np_height4",       np_height4);
 181         settings->setNoiseParams("mgcarpathian_np_hills_terrain", np_hills_terrain);
 182         settings->setNoiseParams("mgcarpathian_np_ridge_terrain", np_ridge_terrain);
 183         settings->setNoiseParams("mgcarpathian_np_step_terrain",  np_step_terrain);
 184         settings->setNoiseParams("mgcarpathian_np_hills",         np_hills);
 185         settings->setNoiseParams("mgcarpathian_np_ridge_mnt",     np_ridge_mnt);
 186         settings->setNoiseParams("mgcarpathian_np_step_mnt",      np_step_mnt);
 187         settings->setNoiseParams("mgcarpathian_np_mnt_var",       np_mnt_var);
 188         settings->setNoiseParams("mgcarpathian_np_cave1",         np_cave1);
 189         settings->setNoiseParams("mgcarpathian_np_cave2",         np_cave2);
 190         settings->setNoiseParams("mgcarpathian_np_cavern",        np_cavern);
 191 }
 192
 193
 194 ////////////////////////////////////////////////////////////////////////////////
 195
 196
 197 // Lerp function
 198 inline float MapgenCarpathian::getLerp(float noise1, float noise2, float mod)
 199 {
 200         return noise1 + mod * (noise2 - noise1);
 201 }
 202
 203 // Steps function
 204 float MapgenCarpathian::getSteps(float noise)
 205 {
 206         float w = 0.5f;
 207         float k = std::floor(noise / w);
 208         float f = (noise - k * w) / w;
 209         float s = std::fmin(2.f * f, 1.f);
 210         return (k + s) * w;
 211 }
 212
 213
 214 ////////////////////////////////////////////////////////////////////////////////
 215
 216
 217 void MapgenCarpathian::makeChunk(BlockMakeData *data)
 218 {
 219         // Pre-conditions
 220         assert(data->vmanip);
 221         assert(data->nodedef);
 222         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 223                         data->blockpos_requested.Y >= data->blockpos_min.Y &&
 224                         data->blockpos_requested.Z >= data->blockpos_min.Z);
 225         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 226                         data->blockpos_requested.Y <= data->blockpos_max.Y &&
 227                         data->blockpos_requested.Z <= data->blockpos_max.Z);
 228
 229         this->generating = true;
 230         this->vm = data->vmanip;
 231         this->ndef = data->nodedef;
 232
 233         v3s16 blockpos_min = data->blockpos_min;
 234         v3s16 blockpos_max = data->blockpos_max;
 235         node_min = blockpos_min * MAP_BLOCKSIZE;
 236         node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 237         full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
 238         full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 239
 240         // Create a block-specific seed
 241         blockseed = getBlockSeed2(full_node_min, seed);
 242
 243         // Generate terrain
 244         s16 stone_surface_max_y = generateTerrain();
 245
 246         // Create heightmap
 247         updateHeightmap(node_min, node_max);
 248
 249         // Init biome generator, place biome-specific nodes, and build biomemap
 250         biomegen->calcBiomeNoise(node_min);
 251
 252         MgStoneType mgstone_type;
 253         content_t biome_stone;
 254         generateBiomes(&mgstone_type, &biome_stone);
 255
 256         // Generate caverns, tunnels and classic caves
 257         if (flags & MG_CAVES) {
 258                 bool has_cavern = false;
 259                 // Generate caverns
 260                 if (spflags & MGCARPATHIAN_CAVERNS)
 261                         has_cavern = generateCaverns(stone_surface_max_y);
 262                 // Generate tunnels and classic caves
 263                 if (has_cavern)
 264                         // Disable classic caves in this mapchunk by setting
 265                         // 'large cave depth' to world base. Avoids excessive liquid in
 266                         // large caverns and floating blobs of overgenerated liquid.
 267                         generateCaves(stone_surface_max_y, -MAX_MAP_GENERATION_LIMIT);
 268                 else
 269                         generateCaves(stone_surface_max_y, large_cave_depth);
 270         }
 271
 272         // Generate dungeons
 273         if ((flags & MG_DUNGEONS) && full_node_min.Y >= dungeon_ymin &&
 274                         full_node_max.Y <= dungeon_ymax)
 275                 generateDungeons(stone_surface_max_y, mgstone_type, biome_stone);
 276
 277         // Generate the registered decorations
 278         if (flags & MG_DECORATIONS)
 279                 m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
 280
 281         // Generate the registered ores
 282         m_emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
 283
 284         // Sprinkle some dust on top after everything else was generated
 285         dustTopNodes();
 286
 287         // Update liquids
 288         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 289
 290         // Calculate lighting
 291         if (flags & MG_LIGHT) {
 292                 calcLighting(node_min - v3s16(0, 1, 0), node_max + v3s16(0, 1, 0),
 293                                 full_node_min, full_node_max);
 294         }
 295
 296         this->generating = false;
 297 }
 298
 299
 300 ////////////////////////////////////////////////////////////////////////////////
 301
 302
 303 int MapgenCarpathian::getSpawnLevelAtPoint(v2s16 p)
 304 {
 305         s16 level_at_point = terrainLevelAtPoint(p.X, p.Y);
 306         if (level_at_point <= water_level || level_at_point > water_level + 32)
 307                 return MAX_MAP_GENERATION_LIMIT; // Unsuitable spawn point
 308
 309         return level_at_point;
 310 }
 311
 312
 313 float MapgenCarpathian::terrainLevelAtPoint(s16 x, s16 z)
 314 {
 315         float height1 = NoisePerlin2D(&noise_height1->np, x, z, seed);
 316         float height2 = NoisePerlin2D(&noise_height2->np, x, z, seed);
 317         float height3 = NoisePerlin2D(&noise_height3->np, x, z, seed);
 318         float height4 = NoisePerlin2D(&noise_height4->np, x, z, seed);
 319         float hter = NoisePerlin2D(&noise_hills_terrain->np, x, z, seed);
 320         float rter = NoisePerlin2D(&noise_ridge_terrain->np, x, z, seed);
 321         float ster = NoisePerlin2D(&noise_step_terrain->np, x, z, seed);
 322         float n_hills = NoisePerlin2D(&noise_hills->np, x, z, seed);
 323         float n_ridge_mnt = NoisePerlin2D(&noise_ridge_mnt->np, x, z, seed);
 324         float n_step_mnt = NoisePerlin2D(&noise_step_mnt->np, x, z, seed);
 325
 326         int height = -MAX_MAP_GENERATION_LIMIT;
 327
 328         for (s16 y = 1; y <= 30; y++) {
 329                 float mnt_var = NoisePerlin3D(&noise_mnt_var->np, x, y, z, seed);
 330
 331                 // Gradient & shallow seabed
 332                 s32 grad = (y < water_level) ? grad_wl + (water_level - y) * 3 : 1 - y;
 333
 334                 // Hill/Mountain height (hilliness)
 335                 float hill1 = getLerp(height1, height2, mnt_var);
 336                 float hill2 = getLerp(height3, height4, mnt_var);
 337                 float hill3 = getLerp(height3, height2, mnt_var);
 338                 float hill4 = getLerp(height1, height4, mnt_var);
 339                 float hilliness =
 340                         std::fmax(std::fmin(hill1, hill2), std::fmin(hill3, hill4));
 341
 342                 // Rolling hills
 343                 float hill_mnt = hilliness * std::pow(n_hills, 2.f);
 344                 float hills = std::pow(std::fabs(hter), 3.f) * hill_mnt;
 345
 346                 // Ridged mountains
 347                 float ridge_mnt = hilliness * (1.f - std::fabs(n_ridge_mnt));
 348                 float ridged_mountains = std::pow(std::fabs(rter), 3.f) * ridge_mnt;
 349
 350                 // Step (terraced) mountains
 351                 float step_mnt = hilliness * getSteps(n_step_mnt);
 352                 float step_mountains = std::pow(std::fabs(ster), 3.f) * step_mnt;
 353
 354                 // Final terrain level
 355                 float mountains = hills + ridged_mountains + step_mountains;
 356                 float surface_level = base_level + mountains + grad;
 357
 358                 if (y > surface_level && height < 0)
 359                         height = y;
 360         }
 361
 362         return height;
 363 }
 364
 365
 366 ////////////////////////////////////////////////////////////////////////////////
 367
 368
 369 int MapgenCarpathian::generateTerrain()
 370 {
 371         MapNode mn_air(CONTENT_AIR);
 372         MapNode mn_stone(c_stone);
 373         MapNode mn_water(c_water_source);
 374
 375         // Calculate noise for terrain generation
 376         noise_height1->perlinMap2D(node_min.X, node_min.Z);
 377         noise_height2->perlinMap2D(node_min.X, node_min.Z);
 378         noise_height3->perlinMap2D(node_min.X, node_min.Z);
 379         noise_height4->perlinMap2D(node_min.X, node_min.Z);
 380         noise_hills_terrain->perlinMap2D(node_min.X, node_min.Z);
 381         noise_ridge_terrain->perlinMap2D(node_min.X, node_min.Z);
 382         noise_step_terrain->perlinMap2D(node_min.X, node_min.Z);
 383         noise_hills->perlinMap2D(node_min.X, node_min.Z);
 384         noise_ridge_mnt->perlinMap2D(node_min.X, node_min.Z);
 385         noise_step_mnt->perlinMap2D(node_min.X, node_min.Z);
 386         noise_mnt_var->perlinMap3D(node_min.X, node_min.Y - 1, node_min.Z);
 387
 388         //// Place nodes
 389         const v3s16 &em = vm->m_area.getExtent();
 390         s16 stone_surface_max_y = -MAX_MAP_GENERATION_LIMIT;
 391         u32 index2d = 0;
 392
 393         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 394         for (s16 x = node_min.X; x <= node_max.X; x++, index2d++) {
 395                 // Hill/Mountain height (hilliness)
 396                 float height1 = noise_height1->result[index2d];
 397                 float height2 = noise_height2->result[index2d];
 398                 float height3 = noise_height3->result[index2d];
 399                 float height4 = noise_height4->result[index2d];
 400
 401                 // Rolling hills
 402                 float hterabs = std::fabs(noise_hills_terrain->result[index2d]);
 403                 float n_hills = noise_hills->result[index2d];
 404                 float hill_mnt = hterabs * hterabs * hterabs * n_hills * n_hills;
 405
 406                 // Ridged mountains
 407                 float rterabs = std::fabs(noise_ridge_terrain->result[index2d]);
 408                 float n_ridge_mnt = noise_ridge_mnt->result[index2d];
 409                 float ridge_mnt = rterabs * rterabs * rterabs *
 410                         (1.f - std::fabs(n_ridge_mnt));
 411
 412                 // Step (terraced) mountains
 413                 float sterabs = std::fabs(noise_step_terrain->result[index2d]);
 414                 float n_step_mnt = noise_step_mnt->result[index2d];
 415                 float step_mnt = sterabs * sterabs * sterabs * getSteps(n_step_mnt);
 416
 417                 // Initialise 3D noise index and voxelmanip index to column base
 418                 u32 index3d = (z - node_min.Z) * zstride_1u1d + (x - node_min.X);
 419                 u32 vi = vm->m_area.index(x, node_min.Y - 1, z);
 420
 421                 for (s16 y = node_min.Y - 1; y <= node_max.Y + 1;
 422                                 y++,
 423                                 index3d += ystride,
 424                                 VoxelArea::add_y(em, vi, 1)) {
 425                         if (vm->m_data[vi].getContent() != CONTENT_IGNORE)
 426                                 continue;
 427
 428                         // Combine height noises and apply 3D variation
 429                         float mnt_var = noise_mnt_var->result[index3d];
 430                         float hill1 = getLerp(height1, height2, mnt_var);
 431                         float hill2 = getLerp(height3, height4, mnt_var);
 432                         float hill3 = getLerp(height3, height2, mnt_var);
 433                         float hill4 = getLerp(height1, height4, mnt_var);
 434
 435                         // 'hilliness' determines whether hills/mountains are
 436                         // small or large
 437                         float hilliness =
 438                                 std::fmax(std::fmin(hill1, hill2), std::fmin(hill3, hill4));
 439                         float hills = hill_mnt * hilliness;
 440                         float ridged_mountains = ridge_mnt * hilliness;
 441                         float step_mountains = step_mnt * hilliness;
 442
 443                         // Gradient & shallow seabed
 444                         s32 grad = (y < water_level) ? grad_wl + (water_level - y) * 3 :
 445                                 1 - y;
 446
 447                         // Final terrain level
 448                         float mountains = hills + ridged_mountains + step_mountains;
 449                         float surface_level = base_level + mountains + grad;
 450
 451                         if (y < surface_level) {
 452                                 vm->m_data[vi] = mn_stone; // Stone
 453                                 if (y > stone_surface_max_y)
 454                                         stone_surface_max_y = y;
 455                         } else if (y <= water_level) {
 456                                 vm->m_data[vi] = mn_water; // Sea water
 457                         } else {
 458                                 vm->m_data[vi] = mn_air; // Air
 459                         }
 460                 }
 461         }
 462
 463         return stone_surface_max_y;
 464 }