src/mapgen_v5.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2015 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
   4 Copyright (C) 2010-2015 paramat, Matt Gregory
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU Lesser General Public License as published by
   8 the Free Software Foundation; either version 2.1 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU Lesser General Public License for more details.
  15
  16 You should have received a copy of the GNU Lesser General Public License along
  17 with this program; if not, write to the Free Software Foundation, Inc.,
  18 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19 */
  20
  21
  22 #include "mapgen.h"
  23 #include "voxel.h"
  24 #include "noise.h"
  25 #include "mapblock.h"
  26 #include "mapnode.h"
  27 #include "map.h"
  28 #include "content_sao.h"
  29 #include "nodedef.h"
  30 #include "voxelalgorithms.h"
  31 //#include "profiler.h" // For TimeTaker
  32 #include "settings.h" // For g_settings
  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
  42
  43 FlagDesc flagdesc_mapgen_v5[] = {
  44         {NULL,         0}
  45 };
  46
  47
  48 MapgenV5::MapgenV5(int mapgenid, MapgenParams *params, EmergeManager *emerge)
  49         : MapgenBasic(mapgenid, params, emerge)
  50 {
  51         this->m_emerge = emerge;
  52         this->bmgr     = emerge->biomemgr;
  53
  54         // amount of elements to skip for the next index
  55         // for noise/height/biome maps (not vmanip)
  56         this->ystride = csize.X;
  57
  58         this->heightmap = new s16[csize.X * csize.Z];
  59
  60         MapgenV5Params *sp = (MapgenV5Params *)params->sparams;
  61
  62         this->spflags    = sp->spflags;
  63         this->cave_width = sp->cave_width;
  64
  65         // Terrain noise
  66         noise_filler_depth = new Noise(&sp->np_filler_depth, seed, csize.X, csize.Z);
  67         noise_factor       = new Noise(&sp->np_factor,       seed, csize.X, csize.Z);
  68         noise_height       = new Noise(&sp->np_height,       seed, csize.X, csize.Z);
  69
  70         // 3D terrain noise
  71         // 1-up 1-down overgeneration
  72         noise_ground = new Noise(&sp->np_ground, seed, csize.X, csize.Y + 2, csize.Z);
  73
  74         MapgenBasic::np_cave1 = sp->np_cave1;
  75         MapgenBasic::np_cave2 = sp->np_cave2;
  76
  77         //// Initialize biome generator
  78         biomegen = emerge->biomemgr->createBiomeGen(
  79                 BIOMEGEN_ORIGINAL, params->bparams, csize);
  80         biomemap = biomegen->biomemap;
  81
  82         //// Resolve nodes to be used
  83         c_stone                = ndef->getId("mapgen_stone");
  84         c_water_source         = ndef->getId("mapgen_water_source");
  85         c_lava_source          = ndef->getId("mapgen_lava_source");
  86         c_desert_stone         = ndef->getId("mapgen_desert_stone");
  87         c_ice                  = ndef->getId("mapgen_ice");
  88         c_sandstone            = ndef->getId("mapgen_sandstone");
  89
  90         c_cobble               = ndef->getId("mapgen_cobble");
  91         c_stair_cobble         = ndef->getId("mapgen_stair_cobble");
  92         c_mossycobble          = ndef->getId("mapgen_mossycobble");
  93         c_sandstonebrick       = ndef->getId("mapgen_sandstonebrick");
  94         c_stair_sandstonebrick = ndef->getId("mapgen_stair_sandstonebrick");
  95
  96         if (c_ice == CONTENT_IGNORE)
  97                 c_ice = CONTENT_AIR;
  98         if (c_mossycobble == CONTENT_IGNORE)
  99                 c_mossycobble = c_cobble;
 100         if (c_stair_cobble == CONTENT_IGNORE)
 101                 c_stair_cobble = c_cobble;
 102         if (c_sandstonebrick == CONTENT_IGNORE)
 103                 c_sandstonebrick = c_sandstone;
 104         if (c_stair_sandstonebrick == CONTENT_IGNORE)
 105                 c_stair_sandstonebrick = c_sandstone;
 106 }
 107
 108
 109 MapgenV5::~MapgenV5()
 110 {
 111         delete noise_filler_depth;
 112         delete noise_factor;
 113         delete noise_height;
 114         delete noise_ground;
 115
 116         delete biomegen;
 117
 118         delete[] heightmap;
 119 }
 120
 121
 122 MapgenV5Params::MapgenV5Params()
 123 {
 124         spflags    = 0;
 125         cave_width = 0.125;
 126
 127         np_filler_depth = NoiseParams(0, 1,  v3f(150, 150, 150), 261,    4, 0.7,  2.0);
 128         np_factor       = NoiseParams(0, 1,  v3f(250, 250, 250), 920381, 3, 0.45, 2.0);
 129         np_height       = NoiseParams(0, 10, v3f(250, 250, 250), 84174,  4, 0.5,  2.0);
 130         np_cave1        = NoiseParams(0, 12, v3f(50,  50,  50),  52534,  4, 0.5,  2.0);
 131         np_cave2        = NoiseParams(0, 12, v3f(50,  50,  50),  10325,  4, 0.5,  2.0);
 132         np_ground       = NoiseParams(0, 40, v3f(80,  80,  80),  983240, 4, 0.55, 2.0, NOISE_FLAG_EASED);
 133 }
 134
 135
 136 //#define CAVE_NOISE_SCALE 12.0
 137 //#define CAVE_NOISE_THRESHOLD (1.5/CAVE_NOISE_SCALE) = 0.125
 138
 139
 140 void MapgenV5Params::readParams(const Settings *settings)
 141 {
 142         settings->getFlagStrNoEx("mgv5_spflags",  spflags, flagdesc_mapgen_v5);
 143         settings->getFloatNoEx("mgv5_cave_width", cave_width);
 144
 145         settings->getNoiseParams("mgv5_np_filler_depth", np_filler_depth);
 146         settings->getNoiseParams("mgv5_np_factor",       np_factor);
 147         settings->getNoiseParams("mgv5_np_height",       np_height);
 148         settings->getNoiseParams("mgv5_np_cave1",        np_cave1);
 149         settings->getNoiseParams("mgv5_np_cave2",        np_cave2);
 150         settings->getNoiseParams("mgv5_np_ground",       np_ground);
 151 }
 152
 153
 154 void MapgenV5Params::writeParams(Settings *settings) const
 155 {
 156         settings->setFlagStr("mgv5_spflags",  spflags, flagdesc_mapgen_v5, U32_MAX);
 157         settings->setFloat("mgv5_cave_width", cave_width);
 158
 159         settings->setNoiseParams("mgv5_np_filler_depth", np_filler_depth);
 160         settings->setNoiseParams("mgv5_np_factor",       np_factor);
 161         settings->setNoiseParams("mgv5_np_height",       np_height);
 162         settings->setNoiseParams("mgv5_np_cave1",        np_cave1);
 163         settings->setNoiseParams("mgv5_np_cave2",        np_cave2);
 164         settings->setNoiseParams("mgv5_np_ground",       np_ground);
 165 }
 166
 167
 168 int MapgenV5::getSpawnLevelAtPoint(v2s16 p)
 169 {
 170         //TimeTaker t("getGroundLevelAtPoint", NULL, PRECISION_MICRO);
 171
 172         float f = 0.55 + NoisePerlin2D(&noise_factor->np, p.X, p.Y, seed);
 173         if (f < 0.01)
 174                 f = 0.01;
 175         else if (f >= 1.0)
 176                 f *= 1.6;
 177         float h = NoisePerlin2D(&noise_height->np, p.X, p.Y, seed);
 178
 179         for (s16 y = 128; y >= -128; y--) {
 180                 float n_ground = NoisePerlin3D(&noise_ground->np, p.X, y, p.Y, seed);
 181
 182                 if (n_ground * f > y - h) {  // If solid
 183                         // If either top 2 nodes of search are solid this is inside a
 184                         // mountain or floatland with possibly no space for the player to spawn.
 185                         if (y >= 127) {
 186                                 return MAX_MAP_GENERATION_LIMIT;  // Unsuitable spawn point
 187                         } else {  // Ground below at least 2 nodes of empty space
 188                                 if (y <= water_level || y > water_level + 16)
 189                                         return MAX_MAP_GENERATION_LIMIT;  // Unsuitable spawn point
 190                                 else
 191                                         return y;
 192                         }
 193                 }
 194         }
 195
 196         //printf("getGroundLevelAtPoint: %dus\n", t.stop());
 197         return MAX_MAP_GENERATION_LIMIT;  // Unsuitable spawn position, no ground found
 198 }
 199
 200
 201 void MapgenV5::makeChunk(BlockMakeData *data)
 202 {
 203         // Pre-conditions
 204         assert(data->vmanip);
 205         assert(data->nodedef);
 206         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 207                 data->blockpos_requested.Y >= data->blockpos_min.Y &&
 208                 data->blockpos_requested.Z >= data->blockpos_min.Z);
 209         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 210                 data->blockpos_requested.Y <= data->blockpos_max.Y &&
 211                 data->blockpos_requested.Z <= data->blockpos_max.Z);
 212
 213         this->generating = true;
 214         this->vm   = data->vmanip;
 215         this->ndef = data->nodedef;
 216         //TimeTaker t("makeChunk");
 217
 218         v3s16 blockpos_min = data->blockpos_min;
 219         v3s16 blockpos_max = data->blockpos_max;
 220         node_min = blockpos_min * MAP_BLOCKSIZE;
 221         node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 222         full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
 223         full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 224
 225         // Create a block-specific seed
 226         blockseed = getBlockSeed2(full_node_min, seed);
 227
 228         // Make some noise
 229         calculateNoise();
 230
 231         // Generate base terrain
 232         s16 stone_surface_max_y = generateBaseTerrain();
 233
 234         // Create heightmap
 235         updateHeightmap(node_min, node_max);
 236
 237         // Init biome generator, place biome-specific nodes, and build biomemap
 238         biomegen->calcBiomeNoise(node_min);
 239         biomegen->getBiomes(heightmap);
 240         MgStoneType stone_type = generateBiomes();
 241
 242         // Generate caves
 243         if ((flags & MG_CAVES) && (stone_surface_max_y >= node_min.Y))
 244                 generateCaves(stone_surface_max_y, MGV5_LARGE_CAVE_DEPTH);
 245
 246         // Generate dungeons and desert temples
 247         if ((flags & MG_DUNGEONS) && (stone_surface_max_y >= node_min.Y)) {
 248                 DungeonParams dp;
 249
 250                 dp.np_rarity  = nparams_dungeon_rarity;
 251                 dp.np_density = nparams_dungeon_density;
 252                 dp.np_wetness = nparams_dungeon_wetness;
 253                 dp.c_water    = c_water_source;
 254                 if (stone_type == MGSTONE_STONE) {
 255                         dp.c_cobble = c_cobble;
 256                         dp.c_moss   = c_mossycobble;
 257                         dp.c_stair  = c_stair_cobble;
 258
 259                         dp.diagonal_dirs = false;
 260                         dp.mossratio     = 3.0;
 261                         dp.holesize      = v3s16(1, 2, 1);
 262                         dp.roomsize      = v3s16(0, 0, 0);
 263                         dp.notifytype    = GENNOTIFY_DUNGEON;
 264                 } else if (stone_type == MGSTONE_DESERT_STONE) {
 265                         dp.c_cobble = c_desert_stone;
 266                         dp.c_moss   = c_desert_stone;
 267                         dp.c_stair  = c_desert_stone;
 268
 269                         dp.diagonal_dirs = true;
 270                         dp.mossratio     = 0.0;
 271                         dp.holesize      = v3s16(2, 3, 2);
 272                         dp.roomsize      = v3s16(2, 5, 2);
 273                         dp.notifytype    = GENNOTIFY_TEMPLE;
 274                 } else if (stone_type == MGSTONE_SANDSTONE) {
 275                         dp.c_cobble = c_sandstonebrick;
 276                         dp.c_moss   = c_sandstonebrick;
 277                         dp.c_stair  = c_sandstonebrick;
 278
 279                         dp.diagonal_dirs = false;
 280                         dp.mossratio     = 0.0;
 281                         dp.holesize      = v3s16(2, 2, 2);
 282                         dp.roomsize      = v3s16(2, 0, 2);
 283                         dp.notifytype    = GENNOTIFY_DUNGEON;
 284                 }
 285
 286                 DungeonGen dgen(this, &dp);
 287                 dgen.generate(blockseed, full_node_min, full_node_max);
 288         }
 289
 290         // Generate the registered decorations
 291         if (flags & MG_DECORATIONS)
 292                 m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
 293
 294         // Generate the registered ores
 295         m_emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
 296
 297         // Sprinkle some dust on top after everything else was generated
 298         dustTopNodes();
 299
 300         //printf("makeChunk: %dms\n", t.stop());
 301
 302         // Add top and bottom side of water to transforming_liquid queue
 303         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 304
 305         // Calculate lighting
 306         if (flags & MG_LIGHT) {
 307                 calcLighting(node_min - v3s16(0, 1, 0), node_max + v3s16(0, 1, 0),
 308                         full_node_min, full_node_max);
 309         }
 310
 311         this->generating = false;
 312 }
 313
 314
 315 void MapgenV5::calculateNoise()
 316 {
 317         //TimeTaker t("calculateNoise", NULL, PRECISION_MICRO);
 318         s16 x = node_min.X;
 319         s16 y = node_min.Y - 1;
 320         s16 z = node_min.Z;
 321
 322         noise_factor->perlinMap2D(x, z);
 323         noise_height->perlinMap2D(x, z);
 324         noise_ground->perlinMap3D(x, y, z);
 325
 326         // Cave noises are calculated in generateCaves()
 327         // only if solid terrain is present in mapchunk
 328
 329         noise_filler_depth->perlinMap2D(x, z);
 330
 331         //printf("calculateNoise: %dus\n", t.stop());
 332 }
 333
 334
 335 //bool is_cave(u32 index) {
 336 //      double d1 = contour(noise_cave1->result[index]);
 337 //      double d2 = contour(noise_cave2->result[index]);
 338 //      return d1*d2 > CAVE_NOISE_THRESHOLD;
 339 //}
 340
 341 //bool val_is_ground(v3s16 p, u32 index, u32 index2d) {
 342 //      double f = 0.55 + noise_factor->result[index2d];
 343 //      if(f < 0.01)
 344 //              f = 0.01;
 345 //      else if(f >= 1.0)
 346 //              f *= 1.6;
 347 //      double h = WATER_LEVEL + 10 * noise_height->result[index2d];
 348 //      return (noise_ground->result[index] * f > (double)p.Y - h);
 349 //}
 350
 351
 352 int MapgenV5::generateBaseTerrain()
 353 {
 354         u32 index = 0;
 355         u32 index2d = 0;
 356         int stone_surface_max_y = -MAX_MAP_GENERATION_LIMIT;
 357
 358         for (s16 z=node_min.Z; z<=node_max.Z; z++) {
 359                 for (s16 y=node_min.Y - 1; y<=node_max.Y + 1; y++) {
 360                         u32 vi = vm->m_area.index(node_min.X, y, z);
 361                         for (s16 x=node_min.X; x<=node_max.X; x++, vi++, index++, index2d++) {
 362                                 if (vm->m_data[vi].getContent() != CONTENT_IGNORE)
 363                                         continue;
 364
 365                                 float f = 0.55 + noise_factor->result[index2d];
 366                                 if (f < 0.01)
 367                                         f = 0.01;
 368                                 else if (f >= 1.0)
 369                                         f *= 1.6;
 370                                 float h = noise_height->result[index2d];
 371
 372                                 if (noise_ground->result[index] * f < y - h) {
 373                                         if (y <= water_level)
 374                                                 vm->m_data[vi] = MapNode(c_water_source);
 375                                         else
 376                                                 vm->m_data[vi] = MapNode(CONTENT_AIR);
 377                                 } else {
 378                                         vm->m_data[vi] = MapNode(c_stone);
 379                                         if (y > stone_surface_max_y)
 380                                                 stone_surface_max_y = y;
 381                                 }
 382                         }
 383                         index2d -= ystride;
 384                 }
 385                 index2d += ystride;
 386         }
 387
 388         return stone_surface_max_y;
 389 }