src/mapgen/mapgen_flat.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2015-2018 paramat
   4 Copyright (C) 2015-2018 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
   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 "mg_biome.h"
  37 #include "mg_ore.h"
  38 #include "mg_decoration.h"
  39 #include "mapgen_flat.h"
  40
  41
  42 FlagDesc flagdesc_mapgen_flat[] = {
  43         {"lakes", MGFLAT_LAKES},
  44         {"hills", MGFLAT_HILLS},
  45         {NULL,    0}
  46 };
  47
  48 ///////////////////////////////////////////////////////////////////////////////////////
  49
  50
  51 MapgenFlat::MapgenFlat(MapgenFlatParams *params, EmergeManager *emerge)
  52         : MapgenBasic(MAPGEN_FLAT, params, emerge)
  53 {
  54         spflags            = params->spflags;
  55         ground_level       = params->ground_level;
  56         large_cave_depth   = params->large_cave_depth;
  57         lava_depth         = params->lava_depth;
  58         small_cave_num_min = params->small_cave_num_min;
  59         small_cave_num_max = params->small_cave_num_max;
  60         large_cave_num_min = params->large_cave_num_min;
  61         large_cave_num_max = params->large_cave_num_max;
  62         large_cave_flooded = params->large_cave_flooded;
  63         cave_width         = params->cave_width;
  64         lake_threshold     = params->lake_threshold;
  65         lake_steepness     = params->lake_steepness;
  66         hill_threshold     = params->hill_threshold;
  67         hill_steepness     = params->hill_steepness;
  68         dungeon_ymin       = params->dungeon_ymin;
  69         dungeon_ymax       = params->dungeon_ymax;
  70
  71         // 2D noise
  72         noise_filler_depth = new Noise(&params->np_filler_depth, seed, csize.X, csize.Z);
  73
  74         if ((spflags & MGFLAT_LAKES) || (spflags & MGFLAT_HILLS))
  75                 noise_terrain = new Noise(&params->np_terrain, seed, csize.X, csize.Z);
  76         // 3D noise
  77         MapgenBasic::np_cave1    = params->np_cave1;
  78         MapgenBasic::np_cave2    = params->np_cave2;
  79         MapgenBasic::np_dungeons = params->np_dungeons;
  80 }
  81
  82
  83 MapgenFlat::~MapgenFlat()
  84 {
  85         delete noise_filler_depth;
  86
  87         if ((spflags & MGFLAT_LAKES) || (spflags & MGFLAT_HILLS))
  88                 delete noise_terrain;
  89 }
  90
  91
  92 MapgenFlatParams::MapgenFlatParams():
  93         np_terrain      (0,   1,   v3f(600, 600, 600), 7244,  5, 0.6, 2.0),
  94         np_filler_depth (0,   1.2, v3f(150, 150, 150), 261,   3, 0.7, 2.0),
  95         np_cave1        (0,   12,  v3f(61,  61,  61),  52534, 3, 0.5, 2.0),
  96         np_cave2        (0,   12,  v3f(67,  67,  67),  10325, 3, 0.5, 2.0),
  97         np_dungeons     (0.9, 0.5, v3f(500, 500, 500), 0,     2, 0.8, 2.0)
  98 {
  99 }
 100
 101
 102 void MapgenFlatParams::readParams(const Settings *settings)
 103 {
 104         settings->getFlagStrNoEx("mgflat_spflags", spflags, flagdesc_mapgen_flat);
 105         settings->getS16NoEx("mgflat_ground_level",         ground_level);
 106         settings->getS16NoEx("mgflat_large_cave_depth",     large_cave_depth);
 107         settings->getS16NoEx("mgflat_lava_depth",           lava_depth);
 108         settings->getU16NoEx("mgflat_small_cave_num_min",   small_cave_num_min);
 109         settings->getU16NoEx("mgflat_small_cave_num_max",   small_cave_num_max);
 110         settings->getU16NoEx("mgflat_large_cave_num_min",   large_cave_num_min);
 111         settings->getU16NoEx("mgflat_large_cave_num_max",   large_cave_num_max);
 112         settings->getFloatNoEx("mgflat_large_cave_flooded", large_cave_flooded);
 113         settings->getFloatNoEx("mgflat_cave_width",         cave_width);
 114         settings->getFloatNoEx("mgflat_lake_threshold",     lake_threshold);
 115         settings->getFloatNoEx("mgflat_lake_steepness",     lake_steepness);
 116         settings->getFloatNoEx("mgflat_hill_threshold",     hill_threshold);
 117         settings->getFloatNoEx("mgflat_hill_steepness",     hill_steepness);
 118         settings->getS16NoEx("mgflat_dungeon_ymin",         dungeon_ymin);
 119         settings->getS16NoEx("mgflat_dungeon_ymax",         dungeon_ymax);
 120
 121         settings->getNoiseParams("mgflat_np_terrain",      np_terrain);
 122         settings->getNoiseParams("mgflat_np_filler_depth", np_filler_depth);
 123         settings->getNoiseParams("mgflat_np_cave1",        np_cave1);
 124         settings->getNoiseParams("mgflat_np_cave2",        np_cave2);
 125         settings->getNoiseParams("mgflat_np_dungeons",     np_dungeons);
 126 }
 127
 128
 129 void MapgenFlatParams::writeParams(Settings *settings) const
 130 {
 131         settings->setFlagStr("mgflat_spflags", spflags, flagdesc_mapgen_flat, U32_MAX);
 132         settings->setS16("mgflat_ground_level",         ground_level);
 133         settings->setS16("mgflat_large_cave_depth",     large_cave_depth);
 134         settings->setS16("mgflat_lava_depth",           lava_depth);
 135         settings->setU16("mgflat_small_cave_num_min",   small_cave_num_min);
 136         settings->setU16("mgflat_small_cave_num_max",   small_cave_num_max);
 137         settings->setU16("mgflat_large_cave_num_min",   large_cave_num_min);
 138         settings->setU16("mgflat_large_cave_num_max",   large_cave_num_max);
 139         settings->setFloat("mgflat_large_cave_flooded", large_cave_flooded);
 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         settings->setS16("mgflat_dungeon_ymin",         dungeon_ymin);
 146         settings->setS16("mgflat_dungeon_ymax",         dungeon_ymax);
 147
 148         settings->setNoiseParams("mgflat_np_terrain",      np_terrain);
 149         settings->setNoiseParams("mgflat_np_filler_depth", np_filler_depth);
 150         settings->setNoiseParams("mgflat_np_cave1",        np_cave1);
 151         settings->setNoiseParams("mgflat_np_cave2",        np_cave2);
 152         settings->setNoiseParams("mgflat_np_dungeons",     np_dungeons);
 153 }
 154
 155
 156 /////////////////////////////////////////////////////////////////
 157
 158
 159 int MapgenFlat::getSpawnLevelAtPoint(v2s16 p)
 160 {
 161         s16 stone_level = ground_level;
 162         float n_terrain =
 163                 ((spflags & MGFLAT_LAKES) || (spflags & MGFLAT_HILLS)) ?
 164                 NoisePerlin2D(&noise_terrain->np, p.X, p.Y, seed) :
 165                 0.0f;
 166
 167         if ((spflags & MGFLAT_LAKES) && n_terrain < lake_threshold) {
 168                 s16 depress = (lake_threshold - n_terrain) * lake_steepness;
 169                 stone_level = ground_level - depress;
 170         } else if ((spflags & MGFLAT_HILLS) && n_terrain > hill_threshold) {
 171                 s16 rise = (n_terrain - hill_threshold) * hill_steepness;
 172                 stone_level = ground_level + rise;
 173         }
 174
 175         if (ground_level < water_level)
 176                 // Ocean world, may not have islands so allow spawn in water
 177                 return MYMAX(stone_level + 2, water_level);
 178
 179         if (stone_level >= water_level)
 180                 // Spawn on land
 181                 // + 2 not + 1, to spawn above biome 'dust' nodes
 182                 return stone_level + 2;
 183
 184         // Unsuitable spawn point
 185         return MAX_MAP_GENERATION_LIMIT;
 186 }
 187
 188
 189 void MapgenFlat::makeChunk(BlockMakeData *data)
 190 {
 191         // Pre-conditions
 192         assert(data->vmanip);
 193         assert(data->nodedef);
 194         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 195                 data->blockpos_requested.Y >= data->blockpos_min.Y &&
 196                 data->blockpos_requested.Z >= data->blockpos_min.Z);
 197         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 198                 data->blockpos_requested.Y <= data->blockpos_max.Y &&
 199                 data->blockpos_requested.Z <= data->blockpos_max.Z);
 200
 201         this->generating = true;
 202         this->vm   = data->vmanip;
 203         this->ndef = data->nodedef;
 204         //TimeTaker t("makeChunk");
 205
 206         v3s16 blockpos_min = data->blockpos_min;
 207         v3s16 blockpos_max = data->blockpos_max;
 208         node_min = blockpos_min * MAP_BLOCKSIZE;
 209         node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 210         full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
 211         full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 212
 213         blockseed = getBlockSeed2(full_node_min, seed);
 214
 215         // Generate base terrain, mountains, and ridges with initial heightmaps
 216         s16 stone_surface_max_y = generateTerrain();
 217
 218         // Create heightmap
 219         updateHeightmap(node_min, node_max);
 220
 221         // Init biome generator, place biome-specific nodes, and build biomemap
 222         if (flags & MG_BIOMES) {
 223                 biomegen->calcBiomeNoise(node_min);
 224                 generateBiomes();
 225         }
 226
 227         if (flags & MG_CAVES) {
 228                 // Generate tunnels
 229                 generateCavesNoiseIntersection(stone_surface_max_y);
 230                 // Generate large randomwalk caves
 231                 generateCavesRandomWalk(stone_surface_max_y, large_cave_depth);
 232         }
 233
 234         // Generate the registered ores
 235         m_emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
 236
 237         if ((flags & MG_DUNGEONS) && full_node_min.Y >= dungeon_ymin &&
 238                         full_node_max.Y <= dungeon_ymax)
 239                 generateDungeons(stone_surface_max_y);
 240
 241         // Generate the registered decorations
 242         if (flags & MG_DECORATIONS)
 243                 m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
 244
 245         // Sprinkle some dust on top after everything else was generated
 246         if (flags & MG_BIOMES)
 247                 dustTopNodes();
 248
 249         //printf("makeChunk: %dms\n", t.stop());
 250
 251         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 252
 253         if (flags & MG_LIGHT)
 254                 calcLighting(node_min - v3s16(0, 1, 0), node_max + v3s16(0, 1, 0),
 255                         full_node_min, full_node_max);
 256
 257         //setLighting(node_min - v3s16(1, 0, 1) * MAP_BLOCKSIZE,
 258         //                      node_max + v3s16(1, 0, 1) * MAP_BLOCKSIZE, 0xFF);
 259
 260         this->generating = false;
 261 }
 262
 263
 264 s16 MapgenFlat::generateTerrain()
 265 {
 266         MapNode n_air(CONTENT_AIR);
 267         MapNode n_stone(c_stone);
 268         MapNode n_water(c_water_source);
 269
 270         const v3s16 &em = vm->m_area.getExtent();
 271         s16 stone_surface_max_y = -MAX_MAP_GENERATION_LIMIT;
 272         u32 ni2d = 0;
 273
 274         bool use_noise = (spflags & MGFLAT_LAKES) || (spflags & MGFLAT_HILLS);
 275         if (use_noise)
 276                 noise_terrain->perlinMap2D(node_min.X, node_min.Z);
 277
 278         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 279         for (s16 x = node_min.X; x <= node_max.X; x++, ni2d++) {
 280                 s16 stone_level = ground_level;
 281                 float n_terrain = use_noise ? noise_terrain->result[ni2d] : 0.0f;
 282
 283                 if ((spflags & MGFLAT_LAKES) && n_terrain < lake_threshold) {
 284                         s16 depress = (lake_threshold - n_terrain) * lake_steepness;
 285                         stone_level = ground_level - depress;
 286                 } else if ((spflags & MGFLAT_HILLS) && n_terrain > hill_threshold) {
 287                         s16 rise = (n_terrain - hill_threshold) * hill_steepness;
 288                         stone_level = ground_level + rise;
 289                 }
 290
 291                 u32 vi = vm->m_area.index(x, node_min.Y - 1, z);
 292                 for (s16 y = node_min.Y - 1; y <= node_max.Y + 1; y++) {
 293                         if (vm->m_data[vi].getContent() == CONTENT_IGNORE) {
 294                                 if (y <= stone_level) {
 295                                         vm->m_data[vi] = n_stone;
 296                                         if (y > stone_surface_max_y)
 297                                                 stone_surface_max_y = y;
 298                                 } else if (y <= water_level) {
 299                                         vm->m_data[vi] = n_water;
 300                                 } else {
 301                                         vm->m_data[vi] = n_air;
 302                                 }
 303                         }
 304                         VoxelArea::add_y(em, vi, 1);
 305                 }
 306         }
 307
 308         return stone_surface_max_y;
 309 }