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_terrain;
  77         delete noise_filler_depth;
  78 }
  79
  80
  81 MapgenFlatParams::MapgenFlatParams()
  82 {
  83         spflags          = 0;
  84         ground_level     = 8;
  85         large_cave_depth = -33;
  86         cave_width       = 0.09;
  87         lake_threshold   = -0.45;
  88         lake_steepness   = 48.0;
  89         hill_threshold   = 0.45;
  90         hill_steepness   = 64.0;
  91
  92         np_terrain      = NoiseParams(0, 1,   v3f(600, 600, 600), 7244,  5, 0.6, 2.0);
  93         np_filler_depth = NoiseParams(0, 1.2, v3f(150, 150, 150), 261,   3, 0.7, 2.0);
  94         np_cave1        = NoiseParams(0, 12,  v3f(61,  61,  61),  52534, 3, 0.5, 2.0);
  95         np_cave2        = NoiseParams(0, 12,  v3f(67,  67,  67),  10325, 3, 0.5, 2.0);
  96 }
  97
  98
  99 void MapgenFlatParams::readParams(const Settings *settings)
 100 {
 101         settings->getFlagStrNoEx("mgflat_spflags",      spflags, flagdesc_mapgen_flat);
 102         settings->getS16NoEx("mgflat_ground_level",     ground_level);
 103         settings->getS16NoEx("mgflat_large_cave_depth", large_cave_depth);
 104         settings->getFloatNoEx("mgflat_cave_width",     cave_width);
 105         settings->getFloatNoEx("mgflat_lake_threshold", lake_threshold);
 106         settings->getFloatNoEx("mgflat_lake_steepness", lake_steepness);
 107         settings->getFloatNoEx("mgflat_hill_threshold", hill_threshold);
 108         settings->getFloatNoEx("mgflat_hill_steepness", hill_steepness);
 109
 110         settings->getNoiseParams("mgflat_np_terrain",      np_terrain);
 111         settings->getNoiseParams("mgflat_np_filler_depth", np_filler_depth);
 112         settings->getNoiseParams("mgflat_np_cave1",        np_cave1);
 113         settings->getNoiseParams("mgflat_np_cave2",        np_cave2);
 114 }
 115
 116
 117 void MapgenFlatParams::writeParams(Settings *settings) const
 118 {
 119         settings->setFlagStr("mgflat_spflags",      spflags, flagdesc_mapgen_flat, U32_MAX);
 120         settings->setS16("mgflat_ground_level",     ground_level);
 121         settings->setS16("mgflat_large_cave_depth", large_cave_depth);
 122         settings->setFloat("mgflat_cave_width",     cave_width);
 123         settings->setFloat("mgflat_lake_threshold", lake_threshold);
 124         settings->setFloat("mgflat_lake_steepness", lake_steepness);
 125         settings->setFloat("mgflat_hill_threshold", hill_threshold);
 126         settings->setFloat("mgflat_hill_steepness", hill_steepness);
 127
 128         settings->setNoiseParams("mgflat_np_terrain",      np_terrain);
 129         settings->setNoiseParams("mgflat_np_filler_depth", np_filler_depth);
 130         settings->setNoiseParams("mgflat_np_cave1",        np_cave1);
 131         settings->setNoiseParams("mgflat_np_cave2",        np_cave2);
 132 }
 133
 134
 135 /////////////////////////////////////////////////////////////////
 136
 137
 138 int MapgenFlat::getSpawnLevelAtPoint(v2s16 p)
 139 {
 140         s16 level_at_point = ground_level;
 141         float n_terrain = 0.0f;
 142         if ((spflags & MGFLAT_LAKES) || (spflags & MGFLAT_HILLS))
 143                 n_terrain = NoisePerlin2D(&noise_terrain->np, p.X, p.Y, seed);
 144
 145         if ((spflags & MGFLAT_LAKES) && n_terrain < lake_threshold) {
 146                 level_at_point = ground_level -
 147                         (lake_threshold - n_terrain) * lake_steepness;
 148         } else if ((spflags & MGFLAT_HILLS) && n_terrain > hill_threshold) {
 149                 level_at_point = ground_level +
 150                         (n_terrain - hill_threshold) * hill_steepness;
 151         }
 152
 153         if (ground_level < water_level)  // Ocean world, allow spawn in water
 154                 return MYMAX(level_at_point, water_level);
 155         else if (level_at_point > water_level)
 156                 return level_at_point;  // Spawn on land
 157         else
 158                 return MAX_MAP_GENERATION_LIMIT;  // Unsuitable spawn point
 159 }
 160
 161
 162 void MapgenFlat::makeChunk(BlockMakeData *data)
 163 {
 164         // Pre-conditions
 165         assert(data->vmanip);
 166         assert(data->nodedef);
 167         assert(data->blockpos_requested.X >= data->blockpos_min.X &&
 168                 data->blockpos_requested.Y >= data->blockpos_min.Y &&
 169                 data->blockpos_requested.Z >= data->blockpos_min.Z);
 170         assert(data->blockpos_requested.X <= data->blockpos_max.X &&
 171                 data->blockpos_requested.Y <= data->blockpos_max.Y &&
 172                 data->blockpos_requested.Z <= data->blockpos_max.Z);
 173
 174         this->generating = true;
 175         this->vm   = data->vmanip;
 176         this->ndef = data->nodedef;
 177         //TimeTaker t("makeChunk");
 178
 179         v3s16 blockpos_min = data->blockpos_min;
 180         v3s16 blockpos_max = data->blockpos_max;
 181         node_min = blockpos_min * MAP_BLOCKSIZE;
 182         node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 183         full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
 184         full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 185
 186         blockseed = getBlockSeed2(full_node_min, seed);
 187
 188         // Generate base terrain, mountains, and ridges with initial heightmaps
 189         s16 stone_surface_max_y = generateTerrain();
 190
 191         // Create heightmap
 192         updateHeightmap(node_min, node_max);
 193
 194         // Init biome generator, place biome-specific nodes, and build biomemap
 195         biomegen->calcBiomeNoise(node_min);
 196         MgStoneType stone_type = generateBiomes();
 197
 198         if (flags & MG_CAVES)
 199                 generateCaves(stone_surface_max_y, large_cave_depth);
 200
 201         if (flags & MG_DUNGEONS)
 202                 generateDungeons(stone_surface_max_y, stone_type);
 203
 204         // Generate the registered decorations
 205         if (flags & MG_DECORATIONS)
 206                 m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
 207
 208         // Generate the registered ores
 209         m_emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
 210
 211         // Sprinkle some dust on top after everything else was generated
 212         dustTopNodes();
 213
 214         //printf("makeChunk: %dms\n", t.stop());
 215
 216         updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
 217
 218         if (flags & MG_LIGHT)
 219                 calcLighting(node_min - v3s16(0, 1, 0), node_max + v3s16(0, 1, 0),
 220                         full_node_min, full_node_max);
 221
 222         //setLighting(node_min - v3s16(1, 0, 1) * MAP_BLOCKSIZE,
 223         //                      node_max + v3s16(1, 0, 1) * MAP_BLOCKSIZE, 0xFF);
 224
 225         this->generating = false;
 226 }
 227
 228
 229 s16 MapgenFlat::generateTerrain()
 230 {
 231         MapNode n_air(CONTENT_AIR);
 232         MapNode n_stone(c_stone);
 233         MapNode n_water(c_water_source);
 234
 235         v3s16 em = vm->m_area.getExtent();
 236         s16 stone_surface_max_y = -MAX_MAP_GENERATION_LIMIT;
 237         u32 ni2d = 0;
 238
 239         bool use_noise = (spflags & MGFLAT_LAKES) || (spflags & MGFLAT_HILLS);
 240         if (use_noise)
 241                 noise_terrain->perlinMap2D(node_min.X, node_min.Z);
 242
 243         for (s16 z = node_min.Z; z <= node_max.Z; z++)
 244         for (s16 x = node_min.X; x <= node_max.X; x++, ni2d++) {
 245                 s16 stone_level = ground_level;
 246                 float n_terrain = use_noise ? noise_terrain->result[ni2d] : 0.0f;
 247
 248                 if ((spflags & MGFLAT_LAKES) && n_terrain < lake_threshold) {
 249                         s16 depress = (lake_threshold - n_terrain) * lake_steepness;
 250                         stone_level = ground_level - depress;
 251                 } else if ((spflags & MGFLAT_HILLS) && n_terrain > hill_threshold) {
 252                         s16 rise = (n_terrain - hill_threshold) * hill_steepness;
 253                         stone_level = ground_level + rise;
 254                 }
 255
 256                 u32 vi = vm->m_area.index(x, node_min.Y - 1, z);
 257                 for (s16 y = node_min.Y - 1; y <= node_max.Y + 1; y++) {
 258                         if (vm->m_data[vi].getContent() == CONTENT_IGNORE) {
 259                                 if (y <= stone_level) {
 260                                         vm->m_data[vi] = n_stone;
 261                                         if (y > stone_surface_max_y)
 262                                                 stone_surface_max_y = y;
 263                                 } else if (y <= water_level) {
 264                                         vm->m_data[vi] = n_water;
 265                                 } else {
 266                                         vm->m_data[vi] = n_air;
 267                                 }
 268                         }
 269                         vm->m_area.add_y(em, vi, 1);
 270                 }
 271         }
 272
 273         return stone_surface_max_y;
 274 }