src/biome.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2013 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
   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 "biome.h"
  21 #include "nodedef.h"
  22 #include "map.h" //for ManualMapVoxelManipulator
  23 #include "log.h"
  24 #include "util/numeric.h"
  25 #include "main.h"
  26 #include "util/mathconstants.h"
  27 #include "porting.h"
  28
  29 NoiseParams nparams_biome_def_heat(50, 50, v3f(500.0, 500.0, 500.0), 5349, 3, 0.70);
  30 NoiseParams nparams_biome_def_humidity(50, 50, v3f(500.0, 500.0, 500.0), 842, 3, 0.55);
  31
  32
  33 BiomeDefManager::BiomeDefManager() {
  34         biome_registration_finished = false;
  35         np_heat     = &nparams_biome_def_heat;
  36         np_humidity = &nparams_biome_def_humidity;
  37
  38         // Create default biome to be used in case none exist
  39         Biome *b = new Biome;
  40
  41         b->id    = 0;
  42         b->name  = "Default";
  43         b->flags = 0;
  44
  45         b->depth_top    = 0;
  46         b->depth_filler = 0;
  47
  48         b->nname_top        = "air";
  49         b->nname_filler     = "air";
  50         b->nname_water      = "mapgen_water_source";
  51         b->nname_dust       = "air";
  52         b->nname_dust_water = "mapgen_water_source";
  53
  54         b->c_top        = CONTENT_IGNORE;
  55         b->c_filler     = CONTENT_IGNORE;
  56         b->c_water      = CONTENT_IGNORE;
  57         b->c_dust       = CONTENT_IGNORE;
  58         b->c_dust_water = CONTENT_IGNORE;
  59
  60         b->height_min     = -MAP_GENERATION_LIMIT;
  61         b->height_max     = MAP_GENERATION_LIMIT;
  62         b->heat_point     = 0.0;
  63         b->humidity_point = 0.0;
  64
  65         biomes.push_back(b);
  66 }
  67
  68
  69 BiomeDefManager::~BiomeDefManager() {
  70         //if (biomecache)
  71         //      delete[] biomecache;
  72
  73         for (size_t i = 0; i != biomes.size(); i++)
  74                 delete biomes[i];
  75 }
  76
  77
  78 Biome *BiomeDefManager::createBiome(BiomeTerrainType btt) {
  79         /*switch (btt) {
  80                 case BIOME_TERRAIN_NORMAL:
  81                         return new Biome;
  82                 case BIOME_TERRAIN_LIQUID:
  83                         return new BiomeLiquid;
  84                 case BIOME_TERRAIN_NETHER:
  85                         return new BiomeHell;
  86                 case BIOME_TERRAIN_AETHER:
  87                         return new BiomeSky;
  88                 case BIOME_TERRAIN_FLAT:
  89                         return new BiomeSuperflat;
  90         }
  91         return NULL;*/
  92         return new Biome;
  93 }
  94
  95
  96 // just a PoC, obviously needs optimization later on (precalculate this)
  97 void BiomeDefManager::calcBiomes(BiomeNoiseInput *input, u8 *biomeid_map) {
  98         int i = 0;
  99         for (int y = 0; y != input->mapsize.Y; y++) {
 100                 for (int x = 0; x != input->mapsize.X; x++, i++) {
 101                         float heat     = (input->heat_map[i] + 1) * 50;
 102                         float humidity = (input->humidity_map[i] + 1) * 50;
 103                         biomeid_map[i] = getBiome(heat, humidity, input->height_map[i])->id;
 104                 }
 105         }
 106 }
 107
 108
 109 void BiomeDefManager::resolveNodeNames(INodeDefManager *ndef) {
 110         Biome *b;
 111
 112         biome_registration_finished = true;
 113
 114         for (size_t i = 0; i < biomes.size(); i++) {
 115                 b = biomes[i];
 116
 117                 b->c_top = ndef->getId(b->nname_top);
 118                 if (b->c_top == CONTENT_IGNORE) {
 119                         errorstream << "BiomeDefManager::resolveNodeNames: node '"
 120                                 << b->nname_top << "' not defined" << std::endl;
 121                         b->c_top     = CONTENT_AIR;
 122                         b->depth_top = 0;
 123                 }
 124
 125                 b->c_filler = ndef->getId(b->nname_filler);
 126                 if (b->c_filler == CONTENT_IGNORE) {
 127                         errorstream << "BiomeDefManager::resolveNodeNames: node '"
 128                                 << b->nname_filler << "' not defined" << std::endl;
 129                         b->c_filler     = CONTENT_AIR;
 130                         b->depth_filler = 0;
 131                 }
 132
 133                 b->c_water = ndef->getId(b->nname_water);
 134                 if (b->c_water == CONTENT_IGNORE) {
 135                         errorstream << "BiomeDefManager::resolveNodeNames: node '"
 136                                 << b->nname_water << "' not defined" << std::endl;
 137                         b->c_water = CONTENT_AIR;
 138                 }
 139
 140                 b->c_dust = ndef->getId(b->nname_dust);
 141                 if (b->c_dust == CONTENT_IGNORE) {
 142                         errorstream << "BiomeDefManager::resolveNodeNames: node '"
 143                                 << b->nname_dust << "' not defined" << std::endl;
 144                 }
 145
 146                 b->c_dust_water = ndef->getId(b->nname_dust_water);
 147                 if (b->c_dust_water == CONTENT_IGNORE) {
 148                         errorstream << "BiomeDefManager::resolveNodeNames: node '"
 149                                 << b->nname_dust_water << "' not defined" << std::endl;
 150                 }
 151         }
 152 }
 153
 154
 155 void BiomeDefManager::addBiome(Biome *b) {
 156         if (biome_registration_finished) {
 157                 errorstream << "BIomeDefManager: biome registration already finished, dropping " << b->name <<std::endl;
 158                 delete b;
 159                 return;
 160         }
 161
 162         size_t nbiomes = biomes.size();
 163         if (nbiomes >= 0xFF) {
 164                 errorstream << "BiomeDefManager: too many biomes, dropping " << b->name << std::endl;
 165                 delete b;
 166                 return;
 167         }
 168
 169         b->id = (u8)nbiomes;
 170         biomes.push_back(b);
 171         verbosestream << "BiomeDefManager: added biome " << b->name << std::endl;
 172 }
 173
 174
 175 Biome *BiomeDefManager::getBiome(float heat, float humidity, s16 y) {
 176         Biome *b, *biome_closest = NULL;
 177         float dist_min = FLT_MAX;
 178
 179         for (size_t i = 1; i < biomes.size(); i++) {
 180                 b = biomes[i];
 181                 if (y > b->height_max || y < b->height_min)
 182                         continue;
 183
 184                 float d_heat     = heat     - b->heat_point;
 185                 float d_humidity = humidity - b->humidity_point;
 186                 float dist = (d_heat * d_heat) +
 187                                          (d_humidity * d_humidity);
 188                 if (dist < dist_min) {
 189                         dist_min = dist;
 190                         biome_closest = b;
 191                 }
 192         }
 193
 194         return biome_closest ? biome_closest : biomes[0];
 195 }
 196
 197
 198 u8 BiomeDefManager::getBiomeIdByName(const char *name) {
 199         for (size_t i = 0; i != biomes.size(); i++) {
 200                 if (!strcasecmp(name, biomes[i]->name.c_str()))
 201                         return i;
 202         }
 203
 204         return 0;
 205 }