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Diffstat (limited to 'src/mg_biome.cpp')
| -rw-r--r-- | src/mg_biome.cpp | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/src/mg_biome.cpp b/src/mg_biome.cpp new file mode 100644 index 000000000..b1172a09d --- /dev/null +++ b/src/mg_biome.cpp @@ -0,0 +1,160 @@ +/* +Minetest +Copyright (C) 2010-2013 kwolekr, Ryan Kwolek <kwolekr@minetest.net> + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU Lesser General Public License as published by +the Free Software Foundation; either version 2.1 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public License along +with this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +*/ + +#include "mg_biome.h" +#include "nodedef.h" +#include "map.h" //for ManualMapVoxelManipulator +#include "log.h" +#include "util/numeric.h" +#include "main.h" +#include "util/mathconstants.h" +#include "porting.h" + +NoiseParams nparams_biome_def_heat(50, 50, v3f(500.0, 500.0, 500.0), 5349, 3, 0.70); +NoiseParams nparams_biome_def_humidity(50, 50, v3f(500.0, 500.0, 500.0), 842, 3, 0.55); + + +BiomeDefManager::BiomeDefManager(NodeResolver *resolver) +{ + biome_registration_finished = false; + np_heat = &nparams_biome_def_heat; + np_humidity = &nparams_biome_def_humidity; + + // Create default biome to be used in case none exist + Biome *b = new Biome; + + b->id = 0; + b->name = "Default"; + b->flags = 0; + b->depth_top = 0; + b->depth_filler = 0; + b->height_min = -MAP_GENERATION_LIMIT; + b->height_max = MAP_GENERATION_LIMIT; + b->heat_point = 0.0; + b->humidity_point = 0.0; + + resolver->addNode("air", "", CONTENT_AIR, &b->c_top); + resolver->addNode("air", "", CONTENT_AIR, &b->c_filler); + resolver->addNode("mapgen_water_source", "", CONTENT_AIR, &b->c_water); + resolver->addNode("air", "", CONTENT_AIR, &b->c_dust); + resolver->addNode("mapgen_water_source", "", CONTENT_AIR, &b->c_dust_water); + + biomes.push_back(b); +} + + +BiomeDefManager::~BiomeDefManager() +{ + //if (biomecache) + // delete[] biomecache; + + for (size_t i = 0; i != biomes.size(); i++) + delete biomes[i]; +} + + +Biome *BiomeDefManager::createBiome(BiomeTerrainType btt) +{ + /*switch (btt) { + case BIOME_TERRAIN_NORMAL: + return new Biome; + case BIOME_TERRAIN_LIQUID: + return new BiomeLiquid; + case BIOME_TERRAIN_NETHER: + return new BiomeHell; + case BIOME_TERRAIN_AETHER: + return new BiomeSky; + case BIOME_TERRAIN_FLAT: + return new BiomeSuperflat; + } + return NULL;*/ + return new Biome; +} + + +// just a PoC, obviously needs optimization later on (precalculate this) +void BiomeDefManager::calcBiomes(BiomeNoiseInput *input, u8 *biomeid_map) +{ + int i = 0; + for (int y = 0; y != input->mapsize.Y; y++) { + for (int x = 0; x != input->mapsize.X; x++, i++) { + float heat = (input->heat_map[i] + 1) * 50; + float humidity = (input->humidity_map[i] + 1) * 50; + biomeid_map[i] = getBiome(heat, humidity, input->height_map[i])->id; + } + } +} + + +bool BiomeDefManager::addBiome(Biome *b) +{ + if (biome_registration_finished) { + errorstream << "BiomeDefManager: biome registration already " + "finished, dropping " << b->name << std::endl; + return false; + } + + size_t nbiomes = biomes.size(); + if (nbiomes >= 0xFF) { + errorstream << "BiomeDefManager: too many biomes, dropping " + << b->name << std::endl; + return false; + } + + b->id = (u8)nbiomes; + biomes.push_back(b); + verbosestream << "BiomeDefManager: added biome " << b->name << std::endl; + + return true; +} + + +Biome *BiomeDefManager::getBiome(float heat, float humidity, s16 y) +{ + Biome *b, *biome_closest = NULL; + float dist_min = FLT_MAX; + + for (size_t i = 1; i < biomes.size(); i++) { + b = biomes[i]; + if (y > b->height_max || y < b->height_min) + continue; + + float d_heat = heat - b->heat_point; + float d_humidity = humidity - b->humidity_point; + float dist = (d_heat * d_heat) + + (d_humidity * d_humidity); + if (dist < dist_min) { + dist_min = dist; + biome_closest = b; + } + } + + return biome_closest ? biome_closest : biomes[0]; +} + + +u8 BiomeDefManager::getBiomeIdByName(const char *name) +{ + for (size_t i = 0; i != biomes.size(); i++) { + if (!strcasecmp(name, biomes[i]->name.c_str())) + return i; + } + + return 0; +} |