src/mapgen_carpathian.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2016 paramat, Matt Gregory
   4 Copyright (C) 2010-2016 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
   5 Copyright (C) 2017 vlapsley, Vaughan Lapsley <vlapsley@gmail.com>
   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         spflags          = params->spflags;
  58         cave_width       = params->cave_width;
  59         large_cave_depth = params->large_cave_depth;
  60         lava_depth       = params->lava_depth;
  61         cavern_limit     = params->cavern_limit;
  62         cavern_taper     = params->cavern_taper;
  63         cavern_threshold = params->cavern_threshold;
  64         grad_wl          = 1 - water_level;
  65
  66         //// 2D Terrain noise
  67         noise_base          = new Noise(&params->np_base,          seed, csize.X, csize.Z);
  68         noise_filler_depth  = new Noise(&params->np_filler_depth,  seed, csize.X, csize.Z);
  69         noise_height1       = new Noise(&params->np_height1,       seed, csize.X, csize.Z);
  70         noise_height2       = new Noise(&params->np_height2,       seed, csize.X, csize.Z);
  71         noise_height3       = new Noise(&params->np_height3,       seed, csize.X, csize.Z);
  72         noise_height4       = new Noise(&params->np_height4,       seed, csize.X, csize.Z);
  73         noise_hills_terrain = new Noise(&params->np_hills_terrain, seed, csize.X, csize.Z);
  74         noise_ridge_terrain = new Noise(&params->np_ridge_terrain, seed, csize.X, csize.Z);
  75         noise_step_terrain  = new Noise(&params->np_step_terrain,  seed, csize.X, csize.Z);
  76         noise_hills         = new Noise(&params->np_hills,         seed, csize.X, csize.Z);
  77         noise_ridge_mnt     = new Noise(&params->np_ridge_mnt,     seed, csize.X, csize.Z);
  78         noise_step_mnt      = new Noise(&params->np_step_mnt,      seed, csize.X, csize.Z);
  79
  80         //// 3D terrain noise
  81         // 1 up 1 down overgeneration
  82         noise_mnt_var = new Noise(&params->np_mnt_var, seed, csize.X, csize.Y + 2, csize.Z);
  83
  84         //// Cave noise
  85         MapgenBasic::np_cave1  = params->np_cave1;
  86         MapgenBasic::np_cave2  = params->np_cave2;
  87         MapgenBasic::np_cavern = params->np_cavern;
  88 }
  89
  90
  91 MapgenCarpathian::~MapgenCarpathian()
  92 {
  93         delete noise_base;
  94         delete noise_filler_depth;
  95         delete noise_height1;
  96         delete noise_height2;
  97         delete noise_height3;
  98         delete noise_height4;
  99         delete noise_hills_terrain;
 100         delete noise_ridge_terrain;
 101         delete noise_step_terrain;
 102         delete noise_hills;
 103         delete noise_ridge_mnt;
 104         delete noise_step_mnt;
 105         delete noise_mnt_var;
 106 }
 107
 108
 109 MapgenCarpathianParams::MapgenCarpathianParams()
 110 {
 111         np_base          = NoiseParams(12, 1,  v3f(2557, 2557, 2557), 6538,  4, 0.8,  0.5);
 112         np_filler_depth  = NoiseParams(0,  1,  v3f(128,  128,  128),  261,   3, 0.7,  2.0);
 113         np_height1       = NoiseParams(0,  5,  v3f(251,  251,  251),  9613,  5, 0.5,  2.0);
 114         np_height2       = NoiseParams(0,  5,  v3f(383,  383,  383),  1949,  5, 0.5,  2.0);
 115         np_height3       = NoiseParams(0,  5,  v3f(509,  509,  509),  3211,  5, 0.5,  2.0);
 116         np_height4       = NoiseParams(0,  5,  v3f(631,  631,  631),  1583,  5, 0.5,  2.0);
 117         np_hills_terrain = NoiseParams(1,  1,  v3f(1301, 1301, 1301), 1692,  5, 0.5,  2.0);
 118         np_ridge_terrain = NoiseParams(1,  1,  v3f(1889, 1889, 1889), 3568,  5, 0.5,  2.0);
 119         np_step_terrain  = NoiseParams(1,  1,  v3f(1889, 1889, 1889), 4157,  5, 0.5,  2.0);
 120         np_hills         = NoiseParams(0,  3,  v3f(257,  257,  257),  6604,  6, 0.5,  2.0);
 121         np_ridge_mnt     = NoiseParams(0,  12, v3f(743,  743,  743),  5520,  6, 0.7,  2.0);
 122         np_step_mnt      = NoiseParams(0,  8,  v3f(509,  509,  509),  2590,  6, 0.6,  2.0);
 123         np_mnt_var       = NoiseParams(0,  1,  v3f(499,  499,  499),  2490,  5, 0.6,  2.0);
 124         np_cave1         = NoiseParams(0,  12, v3f(61,   61,   61),   52534, 3, 0.5,  2.0);
 125         np_cave2         = NoiseParams(0,  12, v3f(67,   67,   67),   10325, 3, 0.5,  2.0);
 126         np_cavern        = NoiseParams(0,  1,  v3f(384,  128,  384),  723,   5, 0.63, 2.0);
 127 }
 128
 129
 130 void MapgenCarpathianParams::readParams(const Settings *settings)
 131 {
 132         settings->getFlagStrNoEx("mgcarpathian_spflags", spflags, flagdesc_mapgen_carpathian);
 133         settings->getFloatNoEx("mgcarpathian_cave_width",       cave_width);
 134         settings->getS16NoEx("mgcarpathian_large_cave_depth",   large_cave_depth);
 135         settings->getS16NoEx("mgcarpathian_lava_depth",         lava_depth);
 136         settings->getS16NoEx("mgcarpathian_cavern_limit",       cavern_limit);
 137         settings->getS16NoEx("mgcarpathian_cavern_taper",       cavern_taper);
 138         settings->getFloatNoEx("mgcarpathian_cavern_threshold", cavern_threshold);
 139
 140         settings->getNoiseParams("mgcarpathian_np_base",          np_base);
 141         settings->getNoiseParams("mgcarpathian_np_filler_depth",  np_filler_depth);
 142         settings->getNoiseParams("mgcarpathian_np_height1",       np_height1);
 143         settings->getNoiseParams("mgcarpathian_np_height2",       np_height2);
 144         settings->getNoiseParams("mgcarpathian_np_height3",       np_height3);
 145         settings->getNoiseParams("mgcarpathian_np_height4",       np_height4);
 146         settings->getNoiseParams("mgcarpathian_np_hills_terrain", np_hills_terrain);
 147         settings->getNoiseParams("mgcarpathian_np_ridge_terrain", np_ridge_terrain);
 148         settings->getNoiseParams("mgcarpathian_np_step_terrain",  np_step_terrain);
 149         settings->getNoiseParams("mgcarpathian_np_hills",         np_hills);
 150         settings->getNoiseParams("mgcarpathian_np_ridge_mnt",     np_ridge_mnt);
 151         settings->getNoiseParams("mgcarpathian_np_step_mnt",      np_step_mnt);
 152         settings->getNoiseParams("mgcarpathian_np_mnt_var",       np_mnt_var);
 153         settings->getNoiseParams("mgcarpathian_np_cave1",         np_cave1);
 154         settings->getNoiseParams("mgcarpathian_np_cave2",         np_cave2);
 155         settings->getNoiseParams("mgcarpathian_np_cavern",        np_cavern);
 156 }
 157
 158
 159 void MapgenCarpathianParams::writeParams(Settings *settings) const
 160 {
 161         settings->setFlagStr("mgcarpathian_spflags", spflags, flagdesc_mapgen_carpathian, U32_MAX);
 162         settings->setFloat("mgcarpathian_cave_width",       cave_width);
 163         settings->setS16("mgcarpathian_large_cave_depth",   large_cave_depth);
 164         settings->setS16("mgcarpathian_lava_depth",         lava_depth);
 165         settings->setS16("mgcarpathian_cavern_limit",       cavern_limit);
 166         settings->setS16("mgcarpathian_cavern_taper",       cavern_taper);
 167         settings->setFloat("mgcarpathian_cavern_threshold", cavern_threshold);
 168
 169         settings->setNoiseParams("mgcarpathian_np_base",          np_base);
 170         settings->setNoiseParams("mgcarpathian_np_filler_depth",  np_filler_depth);
 171         settings->setNoiseParams("mgcarpathian_np_height1",       np_height1);
 172         settings->setNoiseParams("mgcarpathian_np_height2",       np_height2);
 173         settings->setNoiseParams("mgcarpathian_np_height3",       np_height3);
 174         settings->setNoiseParams("mgcarpathian_np_height4",       np_height4);
 175         settings->setNoiseParams("mgcarpathian_np_hills_terrain", np_hills_terrain);
 176         settings->setNoiseParams("mgcarpathian_np_ridge_terrain", np_ridge_terrain);
 177         settings->setNoiseParams("mgcarpathian_np_step_terrain",  np_step_terrain);
 178         settings->setNoiseParams("mgcarpathian_np_hills",         np_hills);
 179         settings->setNoiseParams("mgcarpathian_np_ridge_mnt",     np_ridge_mnt);
 180         settings->setNoiseParams("mgcarpathian_np_step_mnt",      np_step_mnt);
 181         settings->setNoiseParams("mgcarpathian_np_mnt_var",       np_mnt_var);
 182         settings->setNoiseParams("mgcarpathian_np_cave1",         np_cave1);
 183         settings->setNoiseParams("mgcarpathian_np_cave2",         np_cave2);
 184         settings->setNoiseParams("mgcarpathian_np_cavern",        np_cavern);
 185 }
 186
 187
 188 ///////////////////////////////////////////////////////////////////////////////
 189
 190
 191 // Lerp function
 192 inline float MapgenCarpathian::getLerp(float noise1, float noise2, float mod)
 193 {
 194         return noise1 + mod * (noise2 - noise1);
 195 }
 196
 197 // Steps function
 198 float MapgenCarpathian::getSteps(float noise1, float noise2)
 199 {
 200         float w = fabs(noise2);
 201         float k = floor(noise1 / w);
 202         float f = (noise1 - k * w) / w;
 203         float s = std::fmin(2.f * f, 1.f);
 204         return (k + s) * w;
 205 }
 206
 207
 208 ///////////////////////////////////////////////////////////////////////////////
 209
 210
 211 void MapgenCarpathian::makeChunk(BlockMakeData *data)
 212 {
 213         // Pre-conditions
 214         assert(data->vmanip);
 215         assert(data->nodedef);
 216         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 217                         data->blockpos_requested.Y >= data->blockpos_min.Y &&
 218                         data->blockpos_requested.Z >= data->blockpos_min.Z);
 219         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 220                         data->blockpos_requested.Y <= data->blockpos_max.Y &&
 221                         data->blockpos_requested.Z <= data->blockpos_max.Z);
 222
 223         this->generating = true;
 224         this->vm = data->vmanip;
 225         this->ndef = data->nodedef;
 226
 227         v3s16 blockpos_min = data->blockpos_min;
 228         v3s16 blockpos_max = data->blockpos_max;
 229         node_min = blockpos_min * MAP_BLOCKSIZE;
 230         node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 231         full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
 232         full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 233
 234         // Create a block-specific seed
 235         blockseed = getBlockSeed2(full_node_min, seed);
 236
 237         // Generate terrain
 238         s16 stone_surface_max_y = generateTerrain();
 239
 240         // Create heightmap
 241         updateHeightmap(node_min, node_max);
 242
 243         // Init biome generator, place biome-specific nodes, and build biomemap
 244         biomegen->calcBiomeNoise(node_min);
 245         MgStoneType stone_type = generateBiomes();
 246
 247         // Generate caverns, tunnels and classic caves
 248         if (flags & MG_CAVES) {
 249                 bool has_cavern = false;
 250                 // Generate caverns
 251                 if (spflags & MGCARPATHIAN_CAVERNS)
 252                         has_cavern = generateCaverns(stone_surface_max_y);
 253                 // Generate tunnels and classic caves
 254                 if (has_cavern)
 255                         // Disable classic caves in this mapchunk by setting
 256                         // 'large cave depth' to world base. Avoids excessive liquid in
 257                         // large caverns and floating blobs of overgenerated liquid.
 258                         generateCaves(stone_surface_max_y, -MAX_MAP_GENERATION_LIMIT);
 259                 else
 260                         generateCaves(stone_surface_max_y, large_cave_depth);
 261         }
 262
 263         // Generate dungeons
 264         if (flags & MG_DUNGEONS)
 265                 generateDungeons(stone_surface_max_y, stone_type);
 266
 267         // Generate the registered decorations
 268         if (flags & MG_DECORATIONS)
 269                 m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
 270
 271         // Generate the registered ores
 272         m_emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
 273
 274         // Sprinkle some dust on top after everything else was generated
 275         dustTopNodes();
 276
 277         // Update liquids
 278         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 279
 280         // Calculate lighting
 281         if (flags & MG_LIGHT) {
 282                 calcLighting(node_min - v3s16(0, 1, 0), node_max + v3s16(0, 1, 0),
 283                                 full_node_min, full_node_max);
 284         }
 285
 286         this->generating = false;
 287 }
 288
 289
 290 ///////////////////////////////////////////////////////////////////////////////
 291
 292
 293 int MapgenCarpathian::getSpawnLevelAtPoint(v2s16 p)
 294 {
 295         s16 level_at_point = terrainLevelAtPoint(p.X, p.Y);
 296         if (level_at_point <= water_level || level_at_point > water_level + 32)
 297                 return MAX_MAP_GENERATION_LIMIT; // Unsuitable spawn point
 298         else
 299                 return level_at_point;
 300 }
 301
 302
 303 float MapgenCarpathian::terrainLevelAtPoint(s16 x, s16 z)
 304 {
 305         float ground = NoisePerlin2D(&noise_base->np, x, z, seed);
 306         float height1 = NoisePerlin2D(&noise_height1->np, x, z, seed);
 307         float height2 = NoisePerlin2D(&noise_height2->np, x, z, seed);
 308         float height3 = NoisePerlin2D(&noise_height3->np, x, z, seed);
 309         float height4 = NoisePerlin2D(&noise_height4->np, x, z, seed);
 310         float hter = NoisePerlin2D(&noise_hills_terrain->np, x, z, seed);
 311         float rter = NoisePerlin2D(&noise_ridge_terrain->np, x, z, seed);
 312         float ster = NoisePerlin2D(&noise_step_terrain->np, x, z, seed);
 313         float n_hills = NoisePerlin2D(&noise_hills->np, x, z, seed);
 314         float n_ridge_mnt = NoisePerlin2D(&noise_ridge_mnt->np, x, z, seed);
 315         float n_step_mnt = NoisePerlin2D(&noise_step_mnt->np, x, z, seed);
 316
 317         int height = -MAX_MAP_GENERATION_LIMIT;
 318
 319         for (s16 y = 1; y <= 30; y++) {
 320                 float mnt_var = NoisePerlin3D(&noise_mnt_var->np, x, y, z, seed);
 321
 322                 // Gradient & shallow seabed
 323                 s32 grad = (y < water_level) ? grad_wl + (water_level - y) * 3 : 1 - y;
 324
 325                 // Hill/Mountain height (hilliness)
 326                 float hill1 = getLerp(height1, height2, mnt_var);
 327                 float hill2 = getLerp(height3, height4, mnt_var);
 328                 float hill3 = getLerp(height3, height2, mnt_var);
 329                 float hill4 = getLerp(height1, height4, mnt_var);
 330                 float hilliness = std::fmax(std::fmin(hill1, hill2), std::fmin(hill3, hill4));
 331
 332                 // Rolling hills
 333                 float hill_mnt = hilliness * pow(n_hills, 2.f);
 334                 float hills = pow(hter, 3.f) * hill_mnt;
 335
 336                 // Ridged mountains
 337                 float ridge_mnt = hilliness * (1.f - fabs(n_ridge_mnt));
 338                 float ridged_mountains = pow(rter, 3.f) * ridge_mnt;
 339
 340                 // Step (terraced) mountains
 341                 float step_mnt = hilliness * getSteps(n_step_mnt, fabs(mnt_var));
 342                 float step_mountains = pow(ster, 3.f) * step_mnt;
 343
 344                 // Final terrain level
 345                 float mountains = hills + ridged_mountains + step_mountains;
 346                 float surface_level = ground + mountains + grad;
 347
 348                 if (y > surface_level && height < 0)
 349                         height = y;
 350         }
 351
 352         return height;
 353 }
 354
 355
 356 ///////////////////////////////////////////////////////////////////////////////
 357
 358
 359 int MapgenCarpathian::generateTerrain()
 360 {
 361         MapNode mn_air(CONTENT_AIR);
 362         MapNode mn_stone(c_stone);
 363         MapNode mn_water(c_water_source);
 364
 365         s16 stone_surface_max_y = -MAX_MAP_GENERATION_LIMIT;
 366         u32 index2d = 0;
 367         u32 index3d = 0;
 368
 369         // Calculate noise for terrain generation
 370         noise_base->perlinMap2D(node_min.X, node_min.Z);
 371         noise_height1->perlinMap2D(node_min.X, node_min.Z);
 372         noise_height2->perlinMap2D(node_min.X, node_min.Z);
 373         noise_height3->perlinMap2D(node_min.X, node_min.Z);
 374         noise_height4->perlinMap2D(node_min.X, node_min.Z);
 375         noise_hills_terrain->perlinMap2D(node_min.X, node_min.Z);
 376         noise_ridge_terrain->perlinMap2D(node_min.X, node_min.Z);
 377         noise_step_terrain->perlinMap2D(node_min.X, node_min.Z);
 378         noise_hills->perlinMap2D(node_min.X, node_min.Z);
 379         noise_ridge_mnt->perlinMap2D(node_min.X, node_min.Z);
 380         noise_step_mnt->perlinMap2D(node_min.X, node_min.Z);
 381         noise_mnt_var->perlinMap3D(node_min.X, node_min.Y - 1, node_min.Z);
 382
 383         //// Place nodes
 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 vi = vm->m_area.index(node_min.X, y, z);
 387                         for (s16 x = node_min.X; x <= node_max.X;
 388                                         x++, vi++, index2d++, index3d++) {
 389                                 if (vm->m_data[vi].getContent() != CONTENT_IGNORE)
 390                                         continue;
 391
 392                                 // Base terrain
 393                                 float ground = noise_base->result[index2d];
 394
 395                                 // Gradient & shallow seabed
 396                                 s32 grad = (y < water_level) ? grad_wl + (water_level - y) * 3 : 1 - y;
 397
 398                                 // Hill/Mountain height (hilliness)
 399                                 float height1 = noise_height1->result[index2d];
 400                                 float height2 = noise_height2->result[index2d];
 401                                 float height3 = noise_height3->result[index2d];
 402                                 float height4 = noise_height4->result[index2d];
 403                                 float mnt_var = noise_mnt_var->result[index3d];
 404                                 // Combine height noises and apply 3D variation
 405                                 float hill1 = getLerp(height1, height2, mnt_var);
 406                                 float hill2 = getLerp(height3, height4, mnt_var);
 407                                 float hill3 = getLerp(height3, height2, mnt_var);
 408                                 float hill4 = getLerp(height1, height4, mnt_var);
 409                                 // 'hilliness' determines whether hills/mountains are
 410                                 // small or large
 411                                 float hilliness = std::fmax(std::fmin(hill1, hill2), std::fmin(hill3, hill4));
 412
 413                                 // Rolling hills
 414                                 float hter = noise_hills_terrain->result[index2d];
 415                                 float n_hills = noise_hills->result[index2d];
 416                                 float hill_mnt = hilliness * pow(n_hills, 2.f);
 417                                 float hills = pow(fabs(hter), 3.f) * hill_mnt;
 418
 419                                 // Ridged mountains
 420                                 float rter = noise_ridge_terrain->result[index2d];
 421                                 float n_ridge_mnt = noise_ridge_mnt->result[index2d];
 422                                 float ridge_mnt = hilliness * (1.f - fabs(n_ridge_mnt));
 423                                 float ridged_mountains = pow(fabs(rter), 3.f) * ridge_mnt;
 424
 425                                 // Step (terraced) mountains
 426                                 float ster = noise_step_terrain->result[index2d];
 427                                 float n_step_mnt = noise_step_mnt->result[index2d];
 428                                 float step_mnt = hilliness * getSteps(n_step_mnt, fabs(mnt_var));
 429                                 float step_mountains = pow(fabs(ster), 3.f) * step_mnt;
 430
 431                                 // Final terrain level
 432                                 float mountains = hills + ridged_mountains + step_mountains;
 433                                 float surface_level = ground + mountains + grad;
 434
 435                                 if (y < surface_level) {
 436                                         vm->m_data[vi] = mn_stone; // Stone
 437                                         if (y > stone_surface_max_y)
 438                                                 stone_surface_max_y = y;
 439                                 } else if (y <= water_level) {
 440                                         vm->m_data[vi] = mn_water; // Sea water
 441                                 } else {
 442                                         vm->m_data[vi] = mn_air; // Air
 443                                 }
 444                         }
 445                         index2d -= ystride;
 446                 }
 447                 index2d += ystride;
 448         }
 449
 450         return stone_surface_max_y;
 451 }