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 "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(int mapgenid, MapgenFlatParams *params, EmergeManager *emerge)
  52         : MapgenBasic(mapgenid, params, emerge)
  53 {
  54         this->spflags          = params->spflags;
  55         this->ground_level     = params->ground_level;
  56         this->large_cave_depth = params->large_cave_depth;
  57         this->cave_width       = params->cave_width;
  58         this->lake_threshold   = params->lake_threshold;
  59         this->lake_steepness   = params->lake_steepness;
  60         this->hill_threshold   = params->hill_threshold;
  61         this->hill_steepness   = params->hill_steepness;
  62
  63         // 2D noise
  64         noise_filler_depth = new Noise(&params->np_filler_depth, seed, csize.X, csize.Z);
  65
  66         if ((spflags & MGFLAT_LAKES) || (spflags & MGFLAT_HILLS))
  67                 noise_terrain = new Noise(&params->np_terrain, seed, csize.X, csize.Z);
  68         // 3D noise
  69         MapgenBasic::np_cave1 = params->np_cave1;
  70         MapgenBasic::np_cave2 = params->np_cave2;
  71 }
  72
  73
  74 MapgenFlat::~MapgenFlat()
  75 {
  76         delete noise_filler_depth;
  77
  78         if ((spflags & MGFLAT_LAKES) || (spflags & MGFLAT_HILLS))
  79                 delete noise_terrain;
  80 }
  81
  82
  83 MapgenFlatParams::MapgenFlatParams()
  84 {
  85         spflags          = 0;
  86         ground_level     = 8;
  87         large_cave_depth = -33;
  88         cave_width       = 0.09;
  89         lake_threshold   = -0.45;
  90         lake_steepness   = 48.0;
  91         hill_threshold   = 0.45;
  92         hill_steepness   = 64.0;
  93
  94         np_terrain      = NoiseParams(0, 1,   v3f(600, 600, 600), 7244,  5, 0.6, 2.0);
  95         np_filler_depth = NoiseParams(0, 1.2, v3f(150, 150, 150), 261,   3, 0.7, 2.0);
  96         np_cave1        = NoiseParams(0, 12,  v3f(61,  61,  61),  52534, 3, 0.5, 2.0);
  97         np_cave2        = NoiseParams(0, 12,  v3f(67,  67,  67),  10325, 3, 0.5, 2.0);
  98 }
  99
 100
 101 void MapgenFlatParams::readParams(const Settings *settings)
 102 {
 103         settings->getFlagStrNoEx("mgflat_spflags",      spflags, flagdesc_mapgen_flat);
 104         settings->getS16NoEx("mgflat_ground_level",     ground_level);
 105         settings->getS16NoEx("mgflat_large_cave_depth", large_cave_depth);
 106         settings->getFloatNoEx("mgflat_cave_width",     cave_width);
 107         settings->getFloatNoEx("mgflat_lake_threshold", lake_threshold);
 108         settings->getFloatNoEx("mgflat_lake_steepness", lake_steepness);
 109         settings->getFloatNoEx("mgflat_hill_threshold", hill_threshold);
 110         settings->getFloatNoEx("mgflat_hill_steepness", hill_steepness);
 111
 112         settings->getNoiseParams("mgflat_np_terrain",      np_terrain);
 113         settings->getNoiseParams("mgflat_np_filler_depth", np_filler_depth);
 114         settings->getNoiseParams("mgflat_np_cave1",        np_cave1);
 115         settings->getNoiseParams("mgflat_np_cave2",        np_cave2);
 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->setFloat("mgflat_cave_width",     cave_width);
 125         settings->setFloat("mgflat_lake_threshold", lake_threshold);
 126         settings->setFloat("mgflat_lake_steepness", lake_steepness);
 127         settings->setFloat("mgflat_hill_threshold", hill_threshold);
 128         settings->setFloat("mgflat_hill_steepness", hill_steepness);
 129
 130         settings->setNoiseParams("mgflat_np_terrain",      np_terrain);
 131         settings->setNoiseParams("mgflat_np_filler_depth", np_filler_depth);
 132         settings->setNoiseParams("mgflat_np_cave1",        np_cave1);
 133         settings->setNoiseParams("mgflat_np_cave2",        np_cave2);
 134 }
 135
 136
 137 /////////////////////////////////////////////////////////////////
 138
 139
 140 int MapgenFlat::getSpawnLevelAtPoint(v2s16 p)
 141 {
 142         s16 level_at_point = ground_level;
 143         float n_terrain = 0.0f;
 144         if ((spflags & MGFLAT_LAKES) || (spflags & MGFLAT_HILLS))
 145                 n_terrain = NoisePerlin2D(&noise_terrain->np, p.X, p.Y, seed);
 146
 147         if ((spflags & MGFLAT_LAKES) && n_terrain < lake_threshold) {
 148                 level_at_point = ground_level -
 149                         (lake_threshold - n_terrain) * lake_steepness;
 150         } else if ((spflags & MGFLAT_HILLS) && n_terrain > hill_threshold) {
 151                 level_at_point = ground_level +
 152                         (n_terrain - hill_threshold) * hill_steepness;
 153         }
 154
 155         if (ground_level < water_level)  // Ocean world, allow spawn in water
 156                 return MYMAX(level_at_point, water_level);
 157         else if (level_at_point > water_level)
 158                 return level_at_point;  // Spawn on land
 159         else
 160                 return MAX_MAP_GENERATION_LIMIT;  // Unsuitable spawn point
 161 }
 162
 163
 164 void MapgenFlat::makeChunk(BlockMakeData *data)
 165 {
 166         // Pre-conditions
 167         assert(data->vmanip);
 168         assert(data->nodedef);
 169         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 170                 data->blockpos_requested.Y >= data->blockpos_min.Y &&
 171                 data->blockpos_requested.Z >= data->blockpos_min.Z);
 172         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 173                 data->blockpos_requested.Y <= data->blockpos_max.Y &&
 174                 data->blockpos_requested.Z <= data->blockpos_max.Z);
 175
 176         this->generating = true;
 177         this->vm   = data->vmanip;
 178         this->ndef = data->nodedef;
 179         //TimeTaker t("makeChunk");
 180
 181         v3s16 blockpos_min = data->blockpos_min;
 182         v3s16 blockpos_max = data->blockpos_max;
 183         node_min = blockpos_min * MAP_BLOCKSIZE;
 184         node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 185         full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
 186         full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 187
 188         blockseed = getBlockSeed2(full_node_min, seed);
 189
 190         // Generate base terrain, mountains, and ridges with initial heightmaps
 191         s16 stone_surface_max_y = generateTerrain();
 192
 193         // Create heightmap
 194         updateHeightmap(node_min, node_max);
 195
 196         // Init biome generator, place biome-specific nodes, and build biomemap
 197         biomegen->calcBiomeNoise(node_min);
 198         MgStoneType stone_type = generateBiomes();
 199
 200         if (flags & MG_CAVES)
 201                 generateCaves(stone_surface_max_y, large_cave_depth);
 202
 203         if (flags & MG_DUNGEONS)
 204                 generateDungeons(stone_surface_max_y, stone_type);
 205
 206         // Generate the registered decorations
 207         if (flags & MG_DECORATIONS)
 208                 m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
 209
 210         // Generate the registered ores
 211         m_emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
 212
 213         // Sprinkle some dust on top after everything else was generated
 214         dustTopNodes();
 215
 216         //printf("makeChunk: %dms\n", t.stop());
 217
 218         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 219
 220         if (flags & MG_LIGHT)
 221                 calcLighting(node_min - v3s16(0, 1, 0), node_max + v3s16(0, 1, 0),
 222                         full_node_min, full_node_max);
 223
 224         //setLighting(node_min - v3s16(1, 0, 1) * MAP_BLOCKSIZE,
 225         //                      node_max + v3s16(1, 0, 1) * MAP_BLOCKSIZE, 0xFF);
 226
 227         this->generating = false;
 228 }
 229
 230
 231 s16 MapgenFlat::generateTerrain()
 232 {
 233         MapNode n_air(CONTENT_AIR);
 234         MapNode n_stone(c_stone);
 235         MapNode n_water(c_water_source);
 236
 237         v3s16 em = vm->m_area.getExtent();
 238         s16 stone_surface_max_y = -MAX_MAP_GENERATION_LIMIT;
 239         u32 ni2d = 0;
 240
 241         bool use_noise = (spflags & MGFLAT_LAKES) || (spflags & MGFLAT_HILLS);
 242         if (use_noise)
 243                 noise_terrain->perlinMap2D(node_min.X, node_min.Z);
 244
 245         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 246         for (s16 x = node_min.X; x <= node_max.X; x++, ni2d++) {
 247                 s16 stone_level = ground_level;
 248                 float n_terrain = use_noise ? noise_terrain->result[ni2d] : 0.0f;
 249
 250                 if ((spflags & MGFLAT_LAKES) && n_terrain < lake_threshold) {
 251                         s16 depress = (lake_threshold - n_terrain) * lake_steepness;
 252                         stone_level = ground_level - depress;
 253                 } else if ((spflags & MGFLAT_HILLS) && n_terrain > hill_threshold) {
 254                         s16 rise = (n_terrain - hill_threshold) * hill_steepness;
 255                         stone_level = ground_level + rise;
 256                 }
 257
 258                 u32 vi = vm->m_area.index(x, node_min.Y - 1, z);
 259                 for (s16 y = node_min.Y - 1; y <= node_max.Y + 1; y++) {
 260                         if (vm->m_data[vi].getContent() == CONTENT_IGNORE) {
 261                                 if (y <= stone_level) {
 262                                         vm->m_data[vi] = n_stone;
 263                                         if (y > stone_surface_max_y)
 264                                                 stone_surface_max_y = y;
 265                                 } else if (y <= water_level) {
 266                                         vm->m_data[vi] = n_water;
 267                                 } else {
 268                                         vm->m_data[vi] = n_air;
 269                                 }
 270                         }
 271                         vm->m_area.add_y(em, vi, 1);
 272                 }
 273         }
 274
 275         return stone_surface_max_y;
 276 }