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 "nodedef.h"
  29 #include "voxelalgorithms.h"
  30 //#include "profiler.h" // For TimeTaker
  31 #include "settings.h" // For g_settings
  32 #include "emerge.h"
  33 #include "dungeongen.h"
  34 #include "cavegen.h"
  35 #include "mg_biome.h"
  36 #include "mg_ore.h"
  37 #include "mg_decoration.h"
  38 #include "mapgen_flat.h"
  39
  40
  41 FlagDesc flagdesc_mapgen_flat[] = {
  42         {"lakes", MGFLAT_LAKES},
  43         {"hills", MGFLAT_HILLS},
  44         {NULL,    0}
  45 };
  46
  47 ///////////////////////////////////////////////////////////////////////////////////////
  48
  49
  50 MapgenFlat::MapgenFlat(MapgenFlatParams *params, EmergeParams *emerge)
  51         : MapgenBasic(MAPGEN_FLAT, params, emerge)
  52 {
  53         spflags            = params->spflags;
  54         ground_level       = params->ground_level;
  55         large_cave_depth   = params->large_cave_depth;
  56         small_cave_num_min = params->small_cave_num_min;
  57         small_cave_num_max = params->small_cave_num_max;
  58         large_cave_num_min = params->large_cave_num_min;
  59         large_cave_num_max = params->large_cave_num_max;
  60         large_cave_flooded = params->large_cave_flooded;
  61         cave_width         = params->cave_width;
  62         lake_threshold     = params->lake_threshold;
  63         lake_steepness     = params->lake_steepness;
  64         hill_threshold     = params->hill_threshold;
  65         hill_steepness     = params->hill_steepness;
  66         dungeon_ymin       = params->dungeon_ymin;
  67         dungeon_ymax       = params->dungeon_ymax;
  68
  69         // 2D noise
  70         noise_filler_depth = new Noise(&params->np_filler_depth, seed, csize.X, csize.Z);
  71
  72         if ((spflags & MGFLAT_LAKES) || (spflags & MGFLAT_HILLS))
  73                 noise_terrain = new Noise(&params->np_terrain, seed, csize.X, csize.Z);
  74         // 3D noise
  75         MapgenBasic::np_cave1    = params->np_cave1;
  76         MapgenBasic::np_cave2    = params->np_cave2;
  77         MapgenBasic::np_dungeons = params->np_dungeons;
  78 }
  79
  80
  81 MapgenFlat::~MapgenFlat()
  82 {
  83         delete noise_filler_depth;
  84
  85         if ((spflags & MGFLAT_LAKES) || (spflags & MGFLAT_HILLS))
  86                 delete noise_terrain;
  87 }
  88
  89
  90 MapgenFlatParams::MapgenFlatParams():
  91         np_terrain      (0,   1,   v3f(600, 600, 600), 7244,  5, 0.6, 2.0),
  92         np_filler_depth (0,   1.2, v3f(150, 150, 150), 261,   3, 0.7, 2.0),
  93         np_cave1        (0,   12,  v3f(61,  61,  61),  52534, 3, 0.5, 2.0),
  94         np_cave2        (0,   12,  v3f(67,  67,  67),  10325, 3, 0.5, 2.0),
  95         np_dungeons     (0.9, 0.5, v3f(500, 500, 500), 0,     2, 0.8, 2.0)
  96 {
  97 }
  98
  99
 100 void MapgenFlatParams::readParams(const Settings *settings)
 101 {
 102         settings->getFlagStrNoEx("mgflat_spflags", spflags, flagdesc_mapgen_flat);
 103         settings->getS16NoEx("mgflat_ground_level",         ground_level);
 104         settings->getS16NoEx("mgflat_large_cave_depth",     large_cave_depth);
 105         settings->getU16NoEx("mgflat_small_cave_num_min",   small_cave_num_min);
 106         settings->getU16NoEx("mgflat_small_cave_num_max",   small_cave_num_max);
 107         settings->getU16NoEx("mgflat_large_cave_num_min",   large_cave_num_min);
 108         settings->getU16NoEx("mgflat_large_cave_num_max",   large_cave_num_max);
 109         settings->getFloatNoEx("mgflat_large_cave_flooded", large_cave_flooded);
 110         settings->getFloatNoEx("mgflat_cave_width",         cave_width);
 111         settings->getFloatNoEx("mgflat_lake_threshold",     lake_threshold);
 112         settings->getFloatNoEx("mgflat_lake_steepness",     lake_steepness);
 113         settings->getFloatNoEx("mgflat_hill_threshold",     hill_threshold);
 114         settings->getFloatNoEx("mgflat_hill_steepness",     hill_steepness);
 115         settings->getS16NoEx("mgflat_dungeon_ymin",         dungeon_ymin);
 116         settings->getS16NoEx("mgflat_dungeon_ymax",         dungeon_ymax);
 117
 118         settings->getNoiseParams("mgflat_np_terrain",      np_terrain);
 119         settings->getNoiseParams("mgflat_np_filler_depth", np_filler_depth);
 120         settings->getNoiseParams("mgflat_np_cave1",        np_cave1);
 121         settings->getNoiseParams("mgflat_np_cave2",        np_cave2);
 122         settings->getNoiseParams("mgflat_np_dungeons",     np_dungeons);
 123 }
 124
 125
 126 void MapgenFlatParams::writeParams(Settings *settings) const
 127 {
 128         settings->setFlagStr("mgflat_spflags", spflags, flagdesc_mapgen_flat);
 129         settings->setS16("mgflat_ground_level",         ground_level);
 130         settings->setS16("mgflat_large_cave_depth",     large_cave_depth);
 131         settings->setU16("mgflat_small_cave_num_min",   small_cave_num_min);
 132         settings->setU16("mgflat_small_cave_num_max",   small_cave_num_max);
 133         settings->setU16("mgflat_large_cave_num_min",   large_cave_num_min);
 134         settings->setU16("mgflat_large_cave_num_max",   large_cave_num_max);
 135         settings->setFloat("mgflat_large_cave_flooded", large_cave_flooded);
 136         settings->setFloat("mgflat_cave_width",         cave_width);
 137         settings->setFloat("mgflat_lake_threshold",     lake_threshold);
 138         settings->setFloat("mgflat_lake_steepness",     lake_steepness);
 139         settings->setFloat("mgflat_hill_threshold",     hill_threshold);
 140         settings->setFloat("mgflat_hill_steepness",     hill_steepness);
 141         settings->setS16("mgflat_dungeon_ymin",         dungeon_ymin);
 142         settings->setS16("mgflat_dungeon_ymax",         dungeon_ymax);
 143
 144         settings->setNoiseParams("mgflat_np_terrain",      np_terrain);
 145         settings->setNoiseParams("mgflat_np_filler_depth", np_filler_depth);
 146         settings->setNoiseParams("mgflat_np_cave1",        np_cave1);
 147         settings->setNoiseParams("mgflat_np_cave2",        np_cave2);
 148         settings->setNoiseParams("mgflat_np_dungeons",     np_dungeons);
 149 }
 150
 151
 152 void MapgenFlatParams::setDefaultSettings(Settings *settings)
 153 {
 154         settings->setDefault("mgflat_spflags", flagdesc_mapgen_flat, 0);
 155 }
 156
 157
 158 /////////////////////////////////////////////////////////////////
 159
 160
 161 int MapgenFlat::getSpawnLevelAtPoint(v2s16 p)
 162 {
 163         s16 stone_level = ground_level;
 164         float n_terrain =
 165                 ((spflags & MGFLAT_LAKES) || (spflags & MGFLAT_HILLS)) ?
 166                 NoisePerlin2D(&noise_terrain->np, p.X, p.Y, seed) :
 167                 0.0f;
 168
 169         if ((spflags & MGFLAT_LAKES) && n_terrain < lake_threshold) {
 170                 s16 depress = (lake_threshold - n_terrain) * lake_steepness;
 171                 stone_level = ground_level - depress;
 172         } else if ((spflags & MGFLAT_HILLS) && n_terrain > hill_threshold) {
 173                 s16 rise = (n_terrain - hill_threshold) * hill_steepness;
 174                 stone_level = ground_level + rise;
 175         }
 176
 177         if (ground_level < water_level)
 178                 // Ocean world, may not have islands so allow spawn in water
 179                 return MYMAX(stone_level + 2, water_level);
 180
 181         if (stone_level >= water_level)
 182                 // Spawn on land
 183                 // + 2 not + 1, to spawn above biome 'dust' nodes
 184                 return stone_level + 2;
 185
 186         // Unsuitable spawn point
 187         return MAX_MAP_GENERATION_LIMIT;
 188 }
 189
 190
 191 void MapgenFlat::makeChunk(BlockMakeData *data)
 192 {
 193         // Pre-conditions
 194         assert(data->vmanip);
 195         assert(data->nodedef);
 196         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 197                 data->blockpos_requested.Y >= data->blockpos_min.Y &&
 198                 data->blockpos_requested.Z >= data->blockpos_min.Z);
 199         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 200                 data->blockpos_requested.Y <= data->blockpos_max.Y &&
 201                 data->blockpos_requested.Z <= data->blockpos_max.Z);
 202
 203         this->generating = true;
 204         this->vm   = data->vmanip;
 205         this->ndef = data->nodedef;
 206         //TimeTaker t("makeChunk");
 207
 208         v3s16 blockpos_min = data->blockpos_min;
 209         v3s16 blockpos_max = data->blockpos_max;
 210         node_min = blockpos_min * MAP_BLOCKSIZE;
 211         node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 212         full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
 213         full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 214
 215         blockseed = getBlockSeed2(full_node_min, seed);
 216
 217         // Generate base terrain, mountains, and ridges with initial heightmaps
 218         s16 stone_surface_max_y = generateTerrain();
 219
 220         // Create heightmap
 221         updateHeightmap(node_min, node_max);
 222
 223         // Init biome generator, place biome-specific nodes, and build biomemap
 224         if (flags & MG_BIOMES) {
 225                 biomegen->calcBiomeNoise(node_min);
 226                 generateBiomes();
 227         }
 228
 229         if (flags & MG_CAVES) {
 230                 // Generate tunnels
 231                 generateCavesNoiseIntersection(stone_surface_max_y);
 232                 // Generate large randomwalk caves
 233                 generateCavesRandomWalk(stone_surface_max_y, large_cave_depth);
 234         }
 235
 236         // Generate the registered ores
 237         m_emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
 238
 239         if (flags & MG_DUNGEONS)
 240                 generateDungeons(stone_surface_max_y);
 241
 242         // Generate the registered decorations
 243         if (flags & MG_DECORATIONS)
 244                 m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
 245
 246         // Sprinkle some dust on top after everything else was generated
 247         if (flags & MG_BIOMES)
 248                 dustTopNodes();
 249
 250         //printf("makeChunk: %dms\n", t.stop());
 251
 252         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 253
 254         if (flags & MG_LIGHT)
 255                 calcLighting(node_min - v3s16(0, 1, 0), node_max + v3s16(0, 1, 0),
 256                         full_node_min, full_node_max);
 257
 258         //setLighting(node_min - v3s16(1, 0, 1) * MAP_BLOCKSIZE,
 259         //                      node_max + v3s16(1, 0, 1) * MAP_BLOCKSIZE, 0xFF);
 260
 261         this->generating = false;
 262 }
 263
 264
 265 s16 MapgenFlat::generateTerrain()
 266 {
 267         MapNode n_air(CONTENT_AIR);
 268         MapNode n_stone(c_stone);
 269         MapNode n_water(c_water_source);
 270
 271         const v3s16 &em = vm->m_area.getExtent();
 272         s16 stone_surface_max_y = -MAX_MAP_GENERATION_LIMIT;
 273         u32 ni2d = 0;
 274
 275         bool use_noise = (spflags & MGFLAT_LAKES) || (spflags & MGFLAT_HILLS);
 276         if (use_noise)
 277                 noise_terrain->perlinMap2D(node_min.X, node_min.Z);
 278
 279         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 280         for (s16 x = node_min.X; x <= node_max.X; x++, ni2d++) {
 281                 s16 stone_level = ground_level;
 282                 float n_terrain = use_noise ? noise_terrain->result[ni2d] : 0.0f;
 283
 284                 if ((spflags & MGFLAT_LAKES) && n_terrain < lake_threshold) {
 285                         s16 depress = (lake_threshold - n_terrain) * lake_steepness;
 286                         stone_level = ground_level - depress;
 287                 } else if ((spflags & MGFLAT_HILLS) && n_terrain > hill_threshold) {
 288                         s16 rise = (n_terrain - hill_threshold) * hill_steepness;
 289                         stone_level = ground_level + rise;
 290                 }
 291
 292                 u32 vi = vm->m_area.index(x, node_min.Y - 1, z);
 293                 for (s16 y = node_min.Y - 1; y <= node_max.Y + 1; y++) {
 294                         if (vm->m_data[vi].getContent() == CONTENT_IGNORE) {
 295                                 if (y <= stone_level) {
 296                                         vm->m_data[vi] = n_stone;
 297                                         if (y > stone_surface_max_y)
 298                                                 stone_surface_max_y = y;
 299                                 } else if (y <= water_level) {
 300                                         vm->m_data[vi] = n_water;
 301                                 } else {
 302                                         vm->m_data[vi] = n_air;
 303                                 }
 304                         }
 305                         VoxelArea::add_y(em, vi, 1);
 306                 }
 307         }
 308
 309         return stone_surface_max_y;
 310 }