src/mapgen_flat.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_flat.h"
  41
  42
  43 FlagDesc flagdesc_mapgen_flat[] = {
  44         {"lakes", MGFLAT_LAKES},
  45         {"hills", MGFLAT_HILLS},
  46         {NULL,    0}
  47 };
  48
  49 ///////////////////////////////////////////////////////////////////////////////////////
  50
  51
  52 MapgenFlat::MapgenFlat(int mapgenid, MapgenParams *params, EmergeManager *emerge)
  53         : MapgenBasic(mapgenid, params, emerge)
  54 {
  55         this->m_emerge = emerge;
  56         this->bmgr     = emerge->biomemgr;
  57
  58         //// amount of elements to skip for the next index
  59         //// for noise/height/biome maps (not vmanip)
  60         this->ystride = csize.X;
  61
  62         this->heightmap = new s16[csize.X * csize.Z];
  63
  64         MapgenFlatParams *sp = (MapgenFlatParams *)params->sparams;
  65
  66         this->spflags          = sp->spflags;
  67         this->ground_level     = sp->ground_level;
  68         this->large_cave_depth = sp->large_cave_depth;
  69         this->cave_width       = sp->cave_width;
  70         this->lake_threshold   = sp->lake_threshold;
  71         this->lake_steepness   = sp->lake_steepness;
  72         this->hill_threshold   = sp->hill_threshold;
  73         this->hill_steepness   = sp->hill_steepness;
  74
  75         //// 2D noise
  76         noise_terrain      = new Noise(&sp->np_terrain,      seed, csize.X, csize.Z);
  77         noise_filler_depth = new Noise(&sp->np_filler_depth, seed, csize.X, csize.Z);
  78
  79         MapgenBasic::np_cave1 = sp->np_cave1;
  80         MapgenBasic::np_cave2 = sp->np_cave2;
  81
  82         //// Initialize biome generator
  83         biomegen = emerge->biomemgr->createBiomeGen(
  84                 BIOMEGEN_ORIGINAL, params->bparams, csize);
  85         biomemap = biomegen->biomemap;
  86
  87         //// Resolve nodes to be used
  88         c_stone                = ndef->getId("mapgen_stone");
  89         c_water_source         = ndef->getId("mapgen_water_source");
  90         c_lava_source          = ndef->getId("mapgen_lava_source");
  91         c_desert_stone         = ndef->getId("mapgen_desert_stone");
  92         c_ice                  = ndef->getId("mapgen_ice");
  93         c_sandstone            = ndef->getId("mapgen_sandstone");
  94
  95         c_cobble               = ndef->getId("mapgen_cobble");
  96         c_stair_cobble         = ndef->getId("mapgen_stair_cobble");
  97         c_mossycobble          = ndef->getId("mapgen_mossycobble");
  98         c_sandstonebrick       = ndef->getId("mapgen_sandstonebrick");
  99         c_stair_sandstonebrick = ndef->getId("mapgen_stair_sandstonebrick");
 100
 101         if (c_ice == CONTENT_IGNORE)
 102                 c_ice = CONTENT_AIR;
 103         if (c_mossycobble == CONTENT_IGNORE)
 104                 c_mossycobble = c_cobble;
 105         if (c_stair_cobble == CONTENT_IGNORE)
 106                 c_stair_cobble = c_cobble;
 107         if (c_sandstonebrick == CONTENT_IGNORE)
 108                 c_sandstonebrick = c_sandstone;
 109         if (c_stair_sandstonebrick == CONTENT_IGNORE)
 110                 c_stair_sandstonebrick = c_sandstone;
 111 }
 112
 113
 114 MapgenFlat::~MapgenFlat()
 115 {
 116         delete noise_terrain;
 117         delete noise_filler_depth;
 118
 119         delete biomegen;
 120
 121         delete[] heightmap;
 122 }
 123
 124
 125 MapgenFlatParams::MapgenFlatParams()
 126 {
 127         spflags          = 0;
 128         ground_level     = 8;
 129         large_cave_depth = -33;
 130         cave_width       = 0.3;
 131         lake_threshold   = -0.45;
 132         lake_steepness   = 48.0;
 133         hill_threshold   = 0.45;
 134         hill_steepness   = 64.0;
 135
 136         np_terrain      = NoiseParams(0, 1,   v3f(600, 600, 600), 7244,  5, 0.6, 2.0);
 137         np_filler_depth = NoiseParams(0, 1.2, v3f(150, 150, 150), 261,   3, 0.7, 2.0);
 138         np_cave1        = NoiseParams(0, 12,  v3f(96,  96,  96),  52534, 4, 0.5, 2.0);
 139         np_cave2        = NoiseParams(0, 12,  v3f(96,  96,  96),  10325, 4, 0.5, 2.0);
 140 }
 141
 142
 143 void MapgenFlatParams::readParams(const Settings *settings)
 144 {
 145         settings->getFlagStrNoEx("mgflat_spflags",      spflags, flagdesc_mapgen_flat);
 146         settings->getS16NoEx("mgflat_ground_level",     ground_level);
 147         settings->getS16NoEx("mgflat_large_cave_depth", large_cave_depth);
 148         settings->getFloatNoEx("mgflat_cave_width",     cave_width);
 149         settings->getFloatNoEx("mgflat_lake_threshold", lake_threshold);
 150         settings->getFloatNoEx("mgflat_lake_steepness", lake_steepness);
 151         settings->getFloatNoEx("mgflat_hill_threshold", hill_threshold);
 152         settings->getFloatNoEx("mgflat_hill_steepness", hill_steepness);
 153
 154         settings->getNoiseParams("mgflat_np_terrain",      np_terrain);
 155         settings->getNoiseParams("mgflat_np_filler_depth", np_filler_depth);
 156         settings->getNoiseParams("mgflat_np_cave1",        np_cave1);
 157         settings->getNoiseParams("mgflat_np_cave2",        np_cave2);
 158 }
 159
 160
 161 void MapgenFlatParams::writeParams(Settings *settings) const
 162 {
 163         settings->setFlagStr("mgflat_spflags",      spflags, flagdesc_mapgen_flat, U32_MAX);
 164         settings->setS16("mgflat_ground_level",     ground_level);
 165         settings->setS16("mgflat_large_cave_depth", large_cave_depth);
 166         settings->setFloat("mgflat_cave_width",     cave_width);
 167         settings->setFloat("mgflat_lake_threshold", lake_threshold);
 168         settings->setFloat("mgflat_lake_steepness", lake_steepness);
 169         settings->setFloat("mgflat_hill_threshold", hill_threshold);
 170         settings->setFloat("mgflat_hill_steepness", hill_steepness);
 171
 172         settings->setNoiseParams("mgflat_np_terrain",      np_terrain);
 173         settings->setNoiseParams("mgflat_np_filler_depth", np_filler_depth);
 174         settings->setNoiseParams("mgflat_np_cave1",        np_cave1);
 175         settings->setNoiseParams("mgflat_np_cave2",        np_cave2);
 176 }
 177
 178
 179 /////////////////////////////////////////////////////////////////
 180
 181
 182 int MapgenFlat::getSpawnLevelAtPoint(v2s16 p)
 183 {
 184         s16 level_at_point = ground_level;
 185         float n_terrain = NoisePerlin2D(&noise_terrain->np, p.X, p.Y, seed);
 186
 187         if ((spflags & MGFLAT_LAKES) && n_terrain < lake_threshold) {
 188                 level_at_point = ground_level -
 189                         (lake_threshold - n_terrain) * lake_steepness;
 190         } else if ((spflags & MGFLAT_HILLS) && n_terrain > hill_threshold) {
 191                 level_at_point = ground_level +
 192                         (n_terrain - hill_threshold) * hill_steepness;
 193         }
 194
 195         if (ground_level < water_level)  // Ocean world, allow spawn in water
 196                 return MYMAX(level_at_point, water_level);
 197         else if (level_at_point > water_level)
 198                 return level_at_point;  // Spawn on land
 199         else
 200                 return MAX_MAP_GENERATION_LIMIT;  // Unsuitable spawn point
 201 }
 202
 203
 204 void MapgenFlat::makeChunk(BlockMakeData *data)
 205 {
 206         // Pre-conditions
 207         assert(data->vmanip);
 208         assert(data->nodedef);
 209         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 210                 data->blockpos_requested.Y >= data->blockpos_min.Y &&
 211                 data->blockpos_requested.Z >= data->blockpos_min.Z);
 212         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 213                 data->blockpos_requested.Y <= data->blockpos_max.Y &&
 214                 data->blockpos_requested.Z <= data->blockpos_max.Z);
 215
 216         this->generating = true;
 217         this->vm   = data->vmanip;
 218         this->ndef = data->nodedef;
 219         //TimeTaker t("makeChunk");
 220
 221         v3s16 blockpos_min = data->blockpos_min;
 222         v3s16 blockpos_max = data->blockpos_max;
 223         node_min = blockpos_min * MAP_BLOCKSIZE;
 224         node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 225         full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
 226         full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 227
 228         blockseed = getBlockSeed2(full_node_min, seed);
 229
 230         // Make some noise
 231         calculateNoise();
 232
 233         // Generate base terrain, mountains, and ridges with initial heightmaps
 234         s16 stone_surface_max_y = generateTerrain();
 235
 236         // Create heightmap
 237         updateHeightmap(node_min, node_max);
 238
 239         // Init biome generator, place biome-specific nodes, and build biomemap
 240         biomegen->calcBiomeNoise(node_min);
 241         biomegen->getBiomes(heightmap);
 242         MgStoneType stone_type = generateBiomes();
 243
 244         if (flags & MG_CAVES)
 245                 generateCaves(stone_surface_max_y, large_cave_depth);
 246
 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         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 303
 304         if (flags & MG_LIGHT)
 305                 calcLighting(node_min - v3s16(0, 1, 0), node_max + v3s16(0, 1, 0),
 306                         full_node_min, full_node_max);
 307
 308         //setLighting(node_min - v3s16(1, 0, 1) * MAP_BLOCKSIZE,
 309         //                      node_max + v3s16(1, 0, 1) * MAP_BLOCKSIZE, 0xFF);
 310
 311         this->generating = false;
 312 }
 313
 314
 315 void MapgenFlat::calculateNoise()
 316 {
 317         //TimeTaker t("calculateNoise", NULL, PRECISION_MICRO);
 318         s16 x = node_min.X;
 319         s16 z = node_min.Z;
 320
 321         if ((spflags & MGFLAT_LAKES) || (spflags & MGFLAT_HILLS))
 322                 noise_terrain->perlinMap2D(x, z);
 323
 324         // Cave noises are calculated in generateCaves()
 325         // only if solid terrain is present in mapchunk
 326
 327         noise_filler_depth->perlinMap2D(x, z);
 328
 329         //printf("calculateNoise: %dus\n", t.stop());
 330 }
 331
 332
 333 s16 MapgenFlat::generateTerrain()
 334 {
 335         MapNode n_air(CONTENT_AIR);
 336         MapNode n_stone(c_stone);
 337         MapNode n_water(c_water_source);
 338
 339         v3s16 em = vm->m_area.getExtent();
 340         s16 stone_surface_max_y = -MAX_MAP_GENERATION_LIMIT;
 341         u32 ni2d = 0;
 342
 343         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 344         for (s16 x = node_min.X; x <= node_max.X; x++, ni2d++) {
 345                 s16 stone_level = ground_level;
 346                 float n_terrain = 0.0f;
 347
 348                 if ((spflags & MGFLAT_LAKES) || (spflags & MGFLAT_HILLS))
 349                         n_terrain = noise_terrain->result[ni2d];
 350
 351                 if ((spflags & MGFLAT_LAKES) && n_terrain < lake_threshold) {
 352                         s16 depress = (lake_threshold - n_terrain) * lake_steepness;
 353                         stone_level = ground_level - depress;
 354                 } else if ((spflags & MGFLAT_HILLS) && n_terrain > hill_threshold) {
 355                         s16 rise = (n_terrain - hill_threshold) * hill_steepness;
 356                         stone_level = ground_level + rise;
 357                 }
 358
 359                 u32 vi = vm->m_area.index(x, node_min.Y - 1, z);
 360                 for (s16 y = node_min.Y - 1; y <= node_max.Y + 1; y++) {
 361                         if (vm->m_data[vi].getContent() == CONTENT_IGNORE) {
 362                                 if (y <= stone_level) {
 363                                         vm->m_data[vi] = n_stone;
 364                                         if (y > stone_surface_max_y)
 365                                                 stone_surface_max_y = y;
 366                                 } else if (y <= water_level) {
 367                                         vm->m_data[vi] = n_water;
 368                                 } else {
 369                                         vm->m_data[vi] = n_air;
 370                                 }
 371                         }
 372                         vm->m_area.add_y(em, vi, 1);
 373                 }
 374         }
 375
 376         return stone_surface_max_y;
 377 }