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         MapgenFlatParams *sp = (MapgenFlatParams *)params->sparams;
  56
  57         this->spflags          = sp->spflags;
  58         this->ground_level     = sp->ground_level;
  59         this->large_cave_depth = sp->large_cave_depth;
  60         this->cave_width       = sp->cave_width;
  61         this->lake_threshold   = sp->lake_threshold;
  62         this->lake_steepness   = sp->lake_steepness;
  63         this->hill_threshold   = sp->hill_threshold;
  64         this->hill_steepness   = sp->hill_steepness;
  65
  66         //// 2D noise
  67         noise_terrain      = new Noise(&sp->np_terrain,      seed, csize.X, csize.Z);
  68         noise_filler_depth = new Noise(&sp->np_filler_depth, seed, csize.X, csize.Z);
  69
  70         MapgenBasic::np_cave1 = sp->np_cave1;
  71         MapgenBasic::np_cave2 = sp->np_cave2;
  72
  73         // Content used for dungeon generation
  74         c_cobble               = ndef->getId("mapgen_cobble");
  75         c_stair_cobble         = ndef->getId("mapgen_stair_cobble");
  76         c_mossycobble          = ndef->getId("mapgen_mossycobble");
  77         c_sandstonebrick       = ndef->getId("mapgen_sandstonebrick");
  78         c_stair_sandstonebrick = ndef->getId("mapgen_stair_sandstonebrick");
  79
  80         // Fall back to more basic content if not defined
  81         if (c_mossycobble == CONTENT_IGNORE)
  82                 c_mossycobble = c_cobble;
  83         if (c_stair_cobble == CONTENT_IGNORE)
  84                 c_stair_cobble = c_cobble;
  85         if (c_sandstonebrick == CONTENT_IGNORE)
  86                 c_sandstonebrick = c_sandstone;
  87         if (c_stair_sandstonebrick == CONTENT_IGNORE)
  88                 c_stair_sandstonebrick = c_sandstone;
  89 }
  90
  91
  92 MapgenFlat::~MapgenFlat()
  93 {
  94         delete noise_terrain;
  95         delete noise_filler_depth;
  96 }
  97
  98
  99 MapgenFlatParams::MapgenFlatParams()
 100 {
 101         spflags          = 0;
 102         ground_level     = 8;
 103         large_cave_depth = -33;
 104         cave_width       = 0.3;
 105         lake_threshold   = -0.45;
 106         lake_steepness   = 48.0;
 107         hill_threshold   = 0.45;
 108         hill_steepness   = 64.0;
 109
 110         np_terrain      = NoiseParams(0, 1,   v3f(600, 600, 600), 7244,  5, 0.6, 2.0);
 111         np_filler_depth = NoiseParams(0, 1.2, v3f(150, 150, 150), 261,   3, 0.7, 2.0);
 112         np_cave1        = NoiseParams(0, 12,  v3f(96,  96,  96),  52534, 4, 0.5, 2.0);
 113         np_cave2        = NoiseParams(0, 12,  v3f(96,  96,  96),  10325, 4, 0.5, 2.0);
 114 }
 115
 116
 117 void MapgenFlatParams::readParams(const Settings *settings)
 118 {
 119         settings->getFlagStrNoEx("mgflat_spflags",      spflags, flagdesc_mapgen_flat);
 120         settings->getS16NoEx("mgflat_ground_level",     ground_level);
 121         settings->getS16NoEx("mgflat_large_cave_depth", large_cave_depth);
 122         settings->getFloatNoEx("mgflat_cave_width",     cave_width);
 123         settings->getFloatNoEx("mgflat_lake_threshold", lake_threshold);
 124         settings->getFloatNoEx("mgflat_lake_steepness", lake_steepness);
 125         settings->getFloatNoEx("mgflat_hill_threshold", hill_threshold);
 126         settings->getFloatNoEx("mgflat_hill_steepness", hill_steepness);
 127
 128         settings->getNoiseParams("mgflat_np_terrain",      np_terrain);
 129         settings->getNoiseParams("mgflat_np_filler_depth", np_filler_depth);
 130         settings->getNoiseParams("mgflat_np_cave1",        np_cave1);
 131         settings->getNoiseParams("mgflat_np_cave2",        np_cave2);
 132 }
 133
 134
 135 void MapgenFlatParams::writeParams(Settings *settings) const
 136 {
 137         settings->setFlagStr("mgflat_spflags",      spflags, flagdesc_mapgen_flat, U32_MAX);
 138         settings->setS16("mgflat_ground_level",     ground_level);
 139         settings->setS16("mgflat_large_cave_depth", large_cave_depth);
 140         settings->setFloat("mgflat_cave_width",     cave_width);
 141         settings->setFloat("mgflat_lake_threshold", lake_threshold);
 142         settings->setFloat("mgflat_lake_steepness", lake_steepness);
 143         settings->setFloat("mgflat_hill_threshold", hill_threshold);
 144         settings->setFloat("mgflat_hill_steepness", hill_steepness);
 145
 146         settings->setNoiseParams("mgflat_np_terrain",      np_terrain);
 147         settings->setNoiseParams("mgflat_np_filler_depth", np_filler_depth);
 148         settings->setNoiseParams("mgflat_np_cave1",        np_cave1);
 149         settings->setNoiseParams("mgflat_np_cave2",        np_cave2);
 150 }
 151
 152
 153 /////////////////////////////////////////////////////////////////
 154
 155
 156 int MapgenFlat::getSpawnLevelAtPoint(v2s16 p)
 157 {
 158         s16 level_at_point = ground_level;
 159         float n_terrain = NoisePerlin2D(&noise_terrain->np, p.X, p.Y, seed);
 160
 161         if ((spflags & MGFLAT_LAKES) && n_terrain < lake_threshold) {
 162                 level_at_point = ground_level -
 163                         (lake_threshold - n_terrain) * lake_steepness;
 164         } else if ((spflags & MGFLAT_HILLS) && n_terrain > hill_threshold) {
 165                 level_at_point = ground_level +
 166                         (n_terrain - hill_threshold) * hill_steepness;
 167         }
 168
 169         if (ground_level < water_level)  // Ocean world, allow spawn in water
 170                 return MYMAX(level_at_point, water_level);
 171         else if (level_at_point > water_level)
 172                 return level_at_point;  // Spawn on land
 173         else
 174                 return MAX_MAP_GENERATION_LIMIT;  // Unsuitable spawn point
 175 }
 176
 177
 178 void MapgenFlat::makeChunk(BlockMakeData *data)
 179 {
 180         // Pre-conditions
 181         assert(data->vmanip);
 182         assert(data->nodedef);
 183         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 184                 data->blockpos_requested.Y >= data->blockpos_min.Y &&
 185                 data->blockpos_requested.Z >= data->blockpos_min.Z);
 186         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 187                 data->blockpos_requested.Y <= data->blockpos_max.Y &&
 188                 data->blockpos_requested.Z <= data->blockpos_max.Z);
 189
 190         this->generating = true;
 191         this->vm   = data->vmanip;
 192         this->ndef = data->nodedef;
 193         //TimeTaker t("makeChunk");
 194
 195         v3s16 blockpos_min = data->blockpos_min;
 196         v3s16 blockpos_max = data->blockpos_max;
 197         node_min = blockpos_min * MAP_BLOCKSIZE;
 198         node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 199         full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
 200         full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 201
 202         blockseed = getBlockSeed2(full_node_min, seed);
 203
 204         // Generate base terrain, mountains, and ridges with initial heightmaps
 205         s16 stone_surface_max_y = generateTerrain();
 206
 207         // Create heightmap
 208         updateHeightmap(node_min, node_max);
 209
 210         // Init biome generator, place biome-specific nodes, and build biomemap
 211         biomegen->calcBiomeNoise(node_min);
 212         biomegen->getBiomes(heightmap);
 213         MgStoneType stone_type = generateBiomes();
 214
 215         if (flags & MG_CAVES)
 216                 generateCaves(stone_surface_max_y, large_cave_depth);
 217
 218         if ((flags & MG_DUNGEONS) && (stone_surface_max_y >= node_min.Y)) {
 219                 DungeonParams dp;
 220
 221                 dp.np_rarity  = nparams_dungeon_rarity;
 222                 dp.np_density = nparams_dungeon_density;
 223                 dp.np_wetness = nparams_dungeon_wetness;
 224                 dp.c_water    = c_water_source;
 225                 if (stone_type == MGSTONE_STONE) {
 226                         dp.c_cobble = c_cobble;
 227                         dp.c_moss   = c_mossycobble;
 228                         dp.c_stair  = c_stair_cobble;
 229
 230                         dp.diagonal_dirs = false;
 231                         dp.mossratio     = 3.0;
 232                         dp.holesize      = v3s16(1, 2, 1);
 233                         dp.roomsize      = v3s16(0, 0, 0);
 234                         dp.notifytype    = GENNOTIFY_DUNGEON;
 235                 } else if (stone_type == MGSTONE_DESERT_STONE) {
 236                         dp.c_cobble = c_desert_stone;
 237                         dp.c_moss   = c_desert_stone;
 238                         dp.c_stair  = c_desert_stone;
 239
 240                         dp.diagonal_dirs = true;
 241                         dp.mossratio     = 0.0;
 242                         dp.holesize      = v3s16(2, 3, 2);
 243                         dp.roomsize      = v3s16(2, 5, 2);
 244                         dp.notifytype    = GENNOTIFY_TEMPLE;
 245                 } else if (stone_type == MGSTONE_SANDSTONE) {
 246                         dp.c_cobble = c_sandstonebrick;
 247                         dp.c_moss   = c_sandstonebrick;
 248                         dp.c_stair  = c_sandstonebrick;
 249
 250                         dp.diagonal_dirs = false;
 251                         dp.mossratio     = 0.0;
 252                         dp.holesize      = v3s16(2, 2, 2);
 253                         dp.roomsize      = v3s16(2, 0, 2);
 254                         dp.notifytype    = GENNOTIFY_DUNGEON;
 255                 }
 256
 257                 DungeonGen dgen(this, &dp);
 258                 dgen.generate(blockseed, full_node_min, full_node_max);
 259         }
 260
 261         // Generate the registered decorations
 262         if (flags & MG_DECORATIONS)
 263                 m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
 264
 265         // Generate the registered ores
 266         m_emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
 267
 268         // Sprinkle some dust on top after everything else was generated
 269         dustTopNodes();
 270
 271         //printf("makeChunk: %dms\n", t.stop());
 272
 273         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 274
 275         if (flags & MG_LIGHT)
 276                 calcLighting(node_min - v3s16(0, 1, 0), node_max + v3s16(0, 1, 0),
 277                         full_node_min, full_node_max);
 278
 279         //setLighting(node_min - v3s16(1, 0, 1) * MAP_BLOCKSIZE,
 280         //                      node_max + v3s16(1, 0, 1) * MAP_BLOCKSIZE, 0xFF);
 281
 282         this->generating = false;
 283 }
 284
 285
 286 s16 MapgenFlat::generateTerrain()
 287 {
 288         MapNode n_air(CONTENT_AIR);
 289         MapNode n_stone(c_stone);
 290         MapNode n_water(c_water_source);
 291
 292         v3s16 em = vm->m_area.getExtent();
 293         s16 stone_surface_max_y = -MAX_MAP_GENERATION_LIMIT;
 294         u32 ni2d = 0;
 295
 296         bool use_noise = (spflags & MGFLAT_LAKES) || (spflags & MGFLAT_HILLS);
 297         if (use_noise)
 298                 noise_terrain->perlinMap2D(node_min.X, node_min.Z);
 299
 300         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 301         for (s16 x = node_min.X; x <= node_max.X; x++, ni2d++) {
 302                 s16 stone_level = ground_level;
 303                 float n_terrain = use_noise ? noise_terrain->result[ni2d] : 0.0f;
 304
 305                 if ((spflags & MGFLAT_LAKES) && n_terrain < lake_threshold) {
 306                         s16 depress = (lake_threshold - n_terrain) * lake_steepness;
 307                         stone_level = ground_level - depress;
 308                 } else if ((spflags & MGFLAT_HILLS) && n_terrain > hill_threshold) {
 309                         s16 rise = (n_terrain - hill_threshold) * hill_steepness;
 310                         stone_level = ground_level + rise;
 311                 }
 312
 313                 u32 vi = vm->m_area.index(x, node_min.Y - 1, z);
 314                 for (s16 y = node_min.Y - 1; y <= node_max.Y + 1; y++) {
 315                         if (vm->m_data[vi].getContent() == CONTENT_IGNORE) {
 316                                 if (y <= stone_level) {
 317                                         vm->m_data[vi] = n_stone;
 318                                         if (y > stone_surface_max_y)
 319                                                 stone_surface_max_y = y;
 320                                 } else if (y <= water_level) {
 321                                         vm->m_data[vi] = n_water;
 322                                 } else {
 323                                         vm->m_data[vi] = n_air;
 324                                 }
 325                         }
 326                         vm->m_area.add_y(em, vi, 1);
 327                 }
 328         }
 329
 330         return stone_surface_max_y;
 331 }