src/mapgen.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "mapgen.h"
  21 #include "voxel.h"
  22 #include "noise.h"
  23 #include "biome.h"
  24 #include "mapblock.h"
  25 #include "mapnode.h"
  26 #include "map.h"
  27 //#include "serverobject.h"
  28 #include "content_sao.h"
  29 #include "nodedef.h"
  30 #include "content_mapnode.h" // For content_mapnode_get_new_name
  31 #include "voxelalgorithms.h"
  32 #include "profiler.h"
  33 #include "settings.h" // For g_settings
  34 #include "main.h" // For g_profiler
  35 #include "treegen.h"
  36 #include "mapgen_v6.h"
  37
  38 FlagDesc flagdesc_mapgen[] = {
  39         {"trees",          MG_TREES},
  40         {"caves",          MG_CAVES},
  41         {"dungeons",       MG_DUNGEONS},
  42         {"v6_forests",     MGV6_FORESTS},
  43         {"v6_biome_blend", MGV6_BIOME_BLEND},
  44         {"flat",           MG_FLAT},
  45         {NULL,                     0}
  46 };
  47
  48
  49 ///////////////////////////////////////////////////////////////////////////////
  50
  51
  52 void Mapgen::updateLiquid(UniqueQueue<v3s16> *trans_liquid, v3s16 nmin, v3s16 nmax) {
  53         bool isliquid, wasliquid;
  54         v3s16 em  = vm->m_area.getExtent();
  55
  56         for (s16 z = nmin.Z; z <= nmax.Z; z++) {
  57                 for (s16 x = nmin.X; x <= nmax.X; x++) {
  58                         wasliquid = true;
  59
  60                         u32 i = vm->m_area.index(x, nmax.Y, z);
  61                         for (s16 y = nmax.Y; y >= nmin.Y; y--) {
  62                                 isliquid = ndef->get(vm->m_data[i]).isLiquid();
  63
  64                                 // there was a change between liquid and nonliquid, add to queue
  65                                 if (isliquid != wasliquid)
  66                                         trans_liquid->push_back(v3s16(x, y, z));
  67
  68                                 wasliquid = isliquid;
  69                                 vm->m_area.add_y(em, i, -1);
  70                         }
  71                 }
  72         }
  73 }
  74
  75
  76 void Mapgen::setLighting(v3s16 nmin, v3s16 nmax, u8 light) {
  77         ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);
  78         VoxelArea a(nmin - v3s16(1,0,1) * MAP_BLOCKSIZE,
  79                                 nmax + v3s16(1,0,1) * MAP_BLOCKSIZE);
  80
  81         for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
  82                 for (int y = a.MinEdge.Y; y <= a.MaxEdge.Y; y++) {
  83                         u32 i = vm->m_area.index(a.MinEdge.X, y, z);
  84                         for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++, i++)
  85                                 vm->m_data[i].param1 = light;
  86                 }
  87         }
  88 }
  89
  90
  91 void Mapgen::lightSpread(VoxelArea &a, v3s16 p, u8 light) {
  92         if (light <= 1 || !a.contains(p))
  93                 return;
  94
  95         u32 vi = vm->m_area.index(p);
  96         MapNode &nn = vm->m_data[vi];
  97
  98         light--;
  99         // should probably compare masked, but doesn't seem to make a difference
 100         if (light <= nn.param1 || !ndef->get(nn).light_propagates)
 101                 return;
 102
 103         nn.param1 = light;
 104
 105         lightSpread(a, p + v3s16(0, 0, 1), light);
 106         lightSpread(a, p + v3s16(0, 1, 0), light);
 107         lightSpread(a, p + v3s16(1, 0, 0), light);
 108         lightSpread(a, p - v3s16(0, 0, 1), light);
 109         lightSpread(a, p - v3s16(0, 1, 0), light);
 110         lightSpread(a, p - v3s16(1, 0, 0), light);
 111 }
 112
 113
 114 void Mapgen::updateLighting(v3s16 nmin, v3s16 nmax) {
 115         VoxelArea a(nmin - v3s16(1,0,1) * MAP_BLOCKSIZE,
 116                                 nmax + v3s16(1,0,1) * MAP_BLOCKSIZE);
 117         bool block_is_underground = (water_level >= nmax.Y);
 118
 119         ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);
 120         //TimeTaker t("updateLighting");
 121
 122         // first, send vertical rays of sunshine downward
 123         v3s16 em = vm->m_area.getExtent();
 124         for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
 125                 for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++) {
 126                         // see if we can get a light value from the overtop
 127                         u32 i = vm->m_area.index(x, a.MaxEdge.Y + 1, z);
 128                         if (vm->m_data[i].getContent() == CONTENT_IGNORE) {
 129                                 if (block_is_underground)
 130                                         continue;
 131                         } else if ((vm->m_data[i].param1 & 0x0F) != LIGHT_SUN) {
 132                                 continue;
 133                         }
 134                         vm->m_area.add_y(em, i, -1);
 135
 136                         for (int y = a.MaxEdge.Y; y >= a.MinEdge.Y; y--) {
 137                                 MapNode &n = vm->m_data[i];
 138                                 if (!ndef->get(n).sunlight_propagates)
 139                                         break;
 140                                 n.param1 = LIGHT_SUN;
 141                                 vm->m_area.add_y(em, i, -1);
 142                         }
 143                 }
 144         }
 145
 146         // now spread the sunlight and light up any sources
 147         for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
 148                 for (int y = a.MinEdge.Y; y <= a.MaxEdge.Y; y++) {
 149                         u32 i = vm->m_area.index(a.MinEdge.X, y, z);
 150                         for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++, i++) {
 151                                 MapNode &n = vm->m_data[i];
 152                                 if (n.getContent() == CONTENT_IGNORE ||
 153                                         !ndef->get(n).light_propagates)
 154                                         continue;
 155
 156                                 u8 light_produced = ndef->get(n).light_source & 0x0F;
 157                                 if (light_produced)
 158                                         n.param1 = light_produced;
 159
 160                                 u8 light = n.param1 & 0x0F;
 161                                 if (light) {
 162                                         lightSpread(a, v3s16(x,     y,     z + 1), light);
 163                                         lightSpread(a, v3s16(x,     y + 1, z    ), light);
 164                                         lightSpread(a, v3s16(x + 1, y,     z    ), light);
 165                                         lightSpread(a, v3s16(x,     y,     z - 1), light);
 166                                         lightSpread(a, v3s16(x,     y - 1, z    ), light);
 167                                         lightSpread(a, v3s16(x - 1, y,     z    ), light);
 168                                 }
 169                         }
 170                 }
 171         }
 172
 173         //printf("updateLighting: %dms\n", t.stop());
 174 }
 175
 176
 177 void Mapgen::updateLightingOld(v3s16 nmin, v3s16 nmax) {
 178         enum LightBank banks[2] = {LIGHTBANK_DAY, LIGHTBANK_NIGHT};
 179
 180         VoxelArea a(nmin - v3s16(1,0,1) * MAP_BLOCKSIZE,
 181                                 nmax + v3s16(1,0,1) * MAP_BLOCKSIZE);
 182         bool block_is_underground = (water_level > nmax.Y);
 183         bool sunlight = !block_is_underground;
 184
 185         ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);
 186
 187         for (int i = 0; i < 2; i++) {
 188                 enum LightBank bank = banks[i];
 189                 std::set<v3s16> light_sources;
 190                 std::map<v3s16, u8> unlight_from;
 191
 192                 voxalgo::clearLightAndCollectSources(*vm, a, bank, ndef,
 193                                         light_sources, unlight_from);
 194                 voxalgo::propagateSunlight(*vm, a, sunlight, light_sources, ndef);
 195
 196                 vm->unspreadLight(bank, unlight_from, light_sources, ndef);
 197                 vm->spreadLight(bank, light_sources, ndef);
 198         }
 199 }
 200
 201
 202 //////////////////////// Mapgen V6 parameter read/write
 203
 204 bool MapgenV6Params::readParams(Settings *settings) {
 205         freq_desert = settings->getFloat("mgv6_freq_desert");
 206         freq_beach  = settings->getFloat("mgv6_freq_beach");
 207
 208         np_terrain_base   = settings->getNoiseParams("mgv6_np_terrain_base");
 209         np_terrain_higher = settings->getNoiseParams("mgv6_np_terrain_higher");
 210         np_steepness      = settings->getNoiseParams("mgv6_np_steepness");
 211         np_height_select  = settings->getNoiseParams("mgv6_np_height_select");
 212         np_trees          = settings->getNoiseParams("mgv6_np_trees");
 213         np_mud            = settings->getNoiseParams("mgv6_np_mud");
 214         np_beach          = settings->getNoiseParams("mgv6_np_beach");
 215         np_biome          = settings->getNoiseParams("mgv6_np_biome");
 216         np_cave           = settings->getNoiseParams("mgv6_np_cave");
 217
 218         bool success =
 219                 np_terrain_base  && np_terrain_higher && np_steepness &&
 220                 np_height_select && np_trees          && np_mud       &&
 221                 np_beach         && np_biome          && np_cave;
 222         return success;
 223 }
 224
 225
 226 void MapgenV6Params::writeParams(Settings *settings) {
 227         settings->setFloat("mgv6_freq_desert", freq_desert);
 228         settings->setFloat("mgv6_freq_beach",  freq_beach);
 229
 230         settings->setNoiseParams("mgv6_np_terrain_base",   np_terrain_base);
 231         settings->setNoiseParams("mgv6_np_terrain_higher", np_terrain_higher);
 232         settings->setNoiseParams("mgv6_np_steepness",      np_steepness);
 233         settings->setNoiseParams("mgv6_np_height_select",  np_height_select);
 234         settings->setNoiseParams("mgv6_np_trees",          np_trees);
 235         settings->setNoiseParams("mgv6_np_mud",            np_mud);
 236         settings->setNoiseParams("mgv6_np_beach",          np_beach);
 237         settings->setNoiseParams("mgv6_np_biome",          np_biome);
 238         settings->setNoiseParams("mgv6_np_cave",           np_cave);
 239 }
 240
 241
 242 /////////////////////////////////// legacy static functions for farmesh
 243
 244
 245 s16 Mapgen::find_ground_level_from_noise(u64 seed, v2s16 p2d, s16 precision) {
 246         //just need to return something
 247         s16 level = 5;
 248         return level;
 249 }
 250
 251
 252 bool Mapgen::get_have_beach(u64 seed, v2s16 p2d) {
 253         double sandnoise = noise2d_perlin(
 254                         0.2+(float)p2d.X/250, 0.7+(float)p2d.Y/250,
 255                         seed+59420, 3, 0.50);
 256
 257         return (sandnoise > 0.15);
 258 }
 259
 260
 261 double Mapgen::tree_amount_2d(u64 seed, v2s16 p) {
 262         double noise = noise2d_perlin(
 263                         0.5+(float)p.X/125, 0.5+(float)p.Y/125,
 264                         seed+2, 4, 0.66);
 265         double zeroval = -0.39;
 266         if(noise < zeroval)
 267                 return 0;
 268         else
 269                 return 0.04 * (noise-zeroval) / (1.0-zeroval);
 270 }