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         cave_width       = params->cave_width;
  59         lake_threshold   = params->lake_threshold;
  60         lake_steepness   = params->lake_steepness;
  61         hill_threshold   = params->hill_threshold;
  62         hill_steepness   = params->hill_steepness;
  63         dungeon_ymin     = params->dungeon_ymin;
  64         dungeon_ymax     = params->dungeon_ymax;
  65
  66         // 2D noise
  67         noise_filler_depth = new Noise(&params->np_filler_depth, seed, csize.X, csize.Z);
  68
  69         if ((spflags & MGFLAT_LAKES) || (spflags & MGFLAT_HILLS))
  70                 noise_terrain = new Noise(&params->np_terrain, seed, csize.X, csize.Z);
  71         // 3D noise
  72         MapgenBasic::np_cave1    = params->np_cave1;
  73         MapgenBasic::np_cave2    = params->np_cave2;
  74         MapgenBasic::np_dungeons = params->np_dungeons;
  75 }
  76
  77
  78 MapgenFlat::~MapgenFlat()
  79 {
  80         delete noise_filler_depth;
  81
  82         if ((spflags & MGFLAT_LAKES) || (spflags & MGFLAT_HILLS))
  83                 delete noise_terrain;
  84 }
  85
  86
  87 MapgenFlatParams::MapgenFlatParams():
  88         np_terrain      (0,   1,   v3f(600, 600, 600), 7244,  5, 0.6, 2.0),
  89         np_filler_depth (0,   1.2, v3f(150, 150, 150), 261,   3, 0.7, 2.0),
  90         np_cave1        (0,   12,  v3f(61,  61,  61),  52534, 3, 0.5, 2.0),
  91         np_cave2        (0,   12,  v3f(67,  67,  67),  10325, 3, 0.5, 2.0),
  92         np_dungeons     (0.9, 0.5, v3f(500, 500, 500), 0,     2, 0.8, 2.0)
  93 {
  94 }
  95
  96
  97 void MapgenFlatParams::readParams(const Settings *settings)
  98 {
  99         settings->getFlagStrNoEx("mgflat_spflags",      spflags, flagdesc_mapgen_flat);
 100         settings->getS16NoEx("mgflat_ground_level",     ground_level);
 101         settings->getS16NoEx("mgflat_large_cave_depth", large_cave_depth);
 102         settings->getS16NoEx("mgflat_lava_depth",       lava_depth);
 103         settings->getFloatNoEx("mgflat_cave_width",     cave_width);
 104         settings->getFloatNoEx("mgflat_lake_threshold", lake_threshold);
 105         settings->getFloatNoEx("mgflat_lake_steepness", lake_steepness);
 106         settings->getFloatNoEx("mgflat_hill_threshold", hill_threshold);
 107         settings->getFloatNoEx("mgflat_hill_steepness", hill_steepness);
 108         settings->getS16NoEx("mgflat_dungeon_ymin",     dungeon_ymin);
 109         settings->getS16NoEx("mgflat_dungeon_ymax",     dungeon_ymax);
 110
 111         settings->getNoiseParams("mgflat_np_terrain",      np_terrain);
 112         settings->getNoiseParams("mgflat_np_filler_depth", np_filler_depth);
 113         settings->getNoiseParams("mgflat_np_cave1",        np_cave1);
 114         settings->getNoiseParams("mgflat_np_cave2",        np_cave2);
 115         settings->getNoiseParams("mgflat_np_dungeons",     np_dungeons);
 116 }
 117
 118
 119 void MapgenFlatParams::writeParams(Settings *settings) const
 120 {
 121         settings->setFlagStr("mgflat_spflags",      spflags, flagdesc_mapgen_flat, U32_MAX);
 122         settings->setS16("mgflat_ground_level",     ground_level);
 123         settings->setS16("mgflat_large_cave_depth", large_cave_depth);
 124         settings->setS16("mgflat_lava_depth",       lava_depth);
 125         settings->setFloat("mgflat_cave_width",     cave_width);
 126         settings->setFloat("mgflat_lake_threshold", lake_threshold);
 127         settings->setFloat("mgflat_lake_steepness", lake_steepness);
 128         settings->setFloat("mgflat_hill_threshold", hill_threshold);
 129         settings->setFloat("mgflat_hill_steepness", hill_steepness);
 130         settings->setS16("mgflat_dungeon_ymin",     dungeon_ymin);
 131         settings->setS16("mgflat_dungeon_ymax",     dungeon_ymax);
 132
 133         settings->setNoiseParams("mgflat_np_terrain",      np_terrain);
 134         settings->setNoiseParams("mgflat_np_filler_depth", np_filler_depth);
 135         settings->setNoiseParams("mgflat_np_cave1",        np_cave1);
 136         settings->setNoiseParams("mgflat_np_cave2",        np_cave2);
 137         settings->setNoiseParams("mgflat_np_dungeons",     np_dungeons);
 138 }
 139
 140
 141 /////////////////////////////////////////////////////////////////
 142
 143
 144 int MapgenFlat::getSpawnLevelAtPoint(v2s16 p)
 145 {
 146         s16 stone_level = ground_level;
 147         float n_terrain =
 148                 ((spflags & MGFLAT_LAKES) || (spflags & MGFLAT_HILLS)) ?
 149                 NoisePerlin2D(&noise_terrain->np, p.X, p.Y, seed) :
 150                 0.0f;
 151
 152         if ((spflags & MGFLAT_LAKES) && n_terrain < lake_threshold) {
 153                 s16 depress = (lake_threshold - n_terrain) * lake_steepness;
 154                 stone_level = ground_level - depress;
 155         } else if ((spflags & MGFLAT_HILLS) && n_terrain > hill_threshold) {
 156                 s16 rise = (n_terrain - hill_threshold) * hill_steepness;
 157                 stone_level = ground_level + rise;
 158         }
 159
 160         if (ground_level < water_level)
 161                 // Ocean world, may not have islands so allow spawn in water
 162                 return MYMAX(stone_level + 2, water_level);
 163
 164         if (stone_level >= water_level)
 165                 // Spawn on land
 166                 // + 2 not + 1, to spawn above biome 'dust' nodes
 167                 return stone_level + 2;
 168
 169         // Unsuitable spawn point
 170         return MAX_MAP_GENERATION_LIMIT;
 171 }
 172
 173
 174 void MapgenFlat::makeChunk(BlockMakeData *data)
 175 {
 176         // Pre-conditions
 177         assert(data->vmanip);
 178         assert(data->nodedef);
 179         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 180                 data->blockpos_requested.Y >= data->blockpos_min.Y &&
 181                 data->blockpos_requested.Z >= data->blockpos_min.Z);
 182         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 183                 data->blockpos_requested.Y <= data->blockpos_max.Y &&
 184                 data->blockpos_requested.Z <= data->blockpos_max.Z);
 185
 186         this->generating = true;
 187         this->vm   = data->vmanip;
 188         this->ndef = data->nodedef;
 189         //TimeTaker t("makeChunk");
 190
 191         v3s16 blockpos_min = data->blockpos_min;
 192         v3s16 blockpos_max = data->blockpos_max;
 193         node_min = blockpos_min * MAP_BLOCKSIZE;
 194         node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 195         full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
 196         full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 197
 198         blockseed = getBlockSeed2(full_node_min, seed);
 199
 200         // Generate base terrain, mountains, and ridges with initial heightmaps
 201         s16 stone_surface_max_y = generateTerrain();
 202
 203         // Create heightmap
 204         updateHeightmap(node_min, node_max);
 205
 206         // Init biome generator, place biome-specific nodes, and build biomemap
 207         if (flags & MG_BIOMES) {
 208                 biomegen->calcBiomeNoise(node_min);
 209                 generateBiomes();
 210         }
 211
 212         if (flags & MG_CAVES) {
 213                 // Generate tunnels
 214                 generateCavesNoiseIntersection(stone_surface_max_y);
 215                 // Generate large randomwalk caves
 216                 generateCavesRandomWalk(stone_surface_max_y, large_cave_depth);
 217         }
 218
 219         // Generate the registered ores
 220         m_emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
 221
 222         if ((flags & MG_DUNGEONS) && full_node_min.Y >= dungeon_ymin &&
 223                         full_node_max.Y <= dungeon_ymax)
 224                 generateDungeons(stone_surface_max_y);
 225
 226         // Generate the registered decorations
 227         if (flags & MG_DECORATIONS)
 228                 m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
 229
 230         // Sprinkle some dust on top after everything else was generated
 231         if (flags & MG_BIOMES)
 232                 dustTopNodes();
 233
 234         //printf("makeChunk: %dms\n", t.stop());
 235
 236         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 237
 238         if (flags & MG_LIGHT)
 239                 calcLighting(node_min - v3s16(0, 1, 0), node_max + v3s16(0, 1, 0),
 240                         full_node_min, full_node_max);
 241
 242         //setLighting(node_min - v3s16(1, 0, 1) * MAP_BLOCKSIZE,
 243         //                      node_max + v3s16(1, 0, 1) * MAP_BLOCKSIZE, 0xFF);
 244
 245         this->generating = false;
 246 }
 247
 248
 249 s16 MapgenFlat::generateTerrain()
 250 {
 251         MapNode n_air(CONTENT_AIR);
 252         MapNode n_stone(c_stone);
 253         MapNode n_water(c_water_source);
 254
 255         const v3s16 &em = vm->m_area.getExtent();
 256         s16 stone_surface_max_y = -MAX_MAP_GENERATION_LIMIT;
 257         u32 ni2d = 0;
 258
 259         bool use_noise = (spflags & MGFLAT_LAKES) || (spflags & MGFLAT_HILLS);
 260         if (use_noise)
 261                 noise_terrain->perlinMap2D(node_min.X, node_min.Z);
 262
 263         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 264         for (s16 x = node_min.X; x <= node_max.X; x++, ni2d++) {
 265                 s16 stone_level = ground_level;
 266                 float n_terrain = use_noise ? noise_terrain->result[ni2d] : 0.0f;
 267
 268                 if ((spflags & MGFLAT_LAKES) && n_terrain < lake_threshold) {
 269                         s16 depress = (lake_threshold - n_terrain) * lake_steepness;
 270                         stone_level = ground_level - depress;
 271                 } else if ((spflags & MGFLAT_HILLS) && n_terrain > hill_threshold) {
 272                         s16 rise = (n_terrain - hill_threshold) * hill_steepness;
 273                         stone_level = ground_level + rise;
 274                 }
 275
 276                 u32 vi = vm->m_area.index(x, node_min.Y - 1, z);
 277                 for (s16 y = node_min.Y - 1; y <= node_max.Y + 1; y++) {
 278                         if (vm->m_data[vi].getContent() == CONTENT_IGNORE) {
 279                                 if (y <= stone_level) {
 280                                         vm->m_data[vi] = n_stone;
 281                                         if (y > stone_surface_max_y)
 282                                                 stone_surface_max_y = y;
 283                                 } else if (y <= water_level) {
 284                                         vm->m_data[vi] = n_water;
 285                                 } else {
 286                                         vm->m_data[vi] = n_air;
 287                                 }
 288                         }
 289                         VoxelArea::add_y(em, vi, 1);
 290                 }
 291         }
 292
 293         return stone_surface_max_y;
 294 }