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Minetest
Copyright (C) 2014-2016 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
Copyright (C) 2014-2017 paramat
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 "mg_decoration.h"
#include "emerge.h"
#include "server.h"
#include "nodedef.h"
#include "map.h" //for MMVManip
#include "util/numeric.h"
#include "porting.h"
#include "settings.h"
///////////////////////////////////////////////////////////////////////////////
BiomeManager::BiomeManager(Server *server) :
ObjDefManager(server, OBJDEF_BIOME)
{
m_server = server;
// Create default biome to be used in case none exist
Biome *b = new Biome;
b->name = "Default";
b->flags = 0;
b->depth_top = 0;
b->depth_filler = -MAX_MAP_GENERATION_LIMIT;
b->depth_water_top = 0;
b->depth_riverbed = 0;
b->y_min = -MAX_MAP_GENERATION_LIMIT;
b->y_max = MAX_MAP_GENERATION_LIMIT;
b->heat_point = 0.0;
b->humidity_point = 0.0;
b->m_nodenames.push_back("mapgen_stone");
b->m_nodenames.push_back("mapgen_stone");
b->m_nodenames.push_back("mapgen_stone");
b->m_nodenames.push_back("mapgen_water_source");
b->m_nodenames.push_back("mapgen_water_source");
b->m_nodenames.push_back("mapgen_river_water_source");
b->m_nodenames.push_back("mapgen_stone");
b->m_nodenames.push_back("ignore");
m_ndef->pendNodeResolve(b);
add(b);
}
BiomeManager::~BiomeManager()
{
}
void BiomeManager::clear()
{
EmergeManager *emerge = m_server->getEmergeManager();
// Remove all dangling references in Decorations
DecorationManager *decomgr = emerge->decomgr;
for (size_t i = 0; i != decomgr->getNumObjects(); i++) {
Decoration *deco = (Decoration *)decomgr->getRaw(i);
deco->biomes.clear();
}
// Don't delete the first biome
for (size_t i = 1; i < m_objects.size(); i++)
delete (Biome *)m_objects[i];
m_objects.resize(1);
}
////////////////////////////////////////////////////////////////////////////////
void BiomeParamsOriginal::readParams(const Settings *settings)
{
settings->getNoiseParams("mg_biome_np_heat", np_heat);
settings->getNoiseParams("mg_biome_np_heat_blend", np_heat_blend);
settings->getNoiseParams("mg_biome_np_humidity", np_humidity);
settings->getNoiseParams("mg_biome_np_humidity_blend", np_humidity_blend);
}
void BiomeParamsOriginal::writeParams(Settings *settings) const
{
settings->setNoiseParams("mg_biome_np_heat", np_heat);
settings->setNoiseParams("mg_biome_np_heat_blend", np_heat_blend);
settings->setNoiseParams("mg_biome_np_humidity", np_humidity);
settings->setNoiseParams("mg_biome_np_humidity_blend", np_humidity_blend);
}
////////////////////////////////////////////////////////////////////////////////
BiomeGenOriginal::BiomeGenOriginal(BiomeManager *biomemgr,
BiomeParamsOriginal *params, v3s16 chunksize)
{
m_bmgr = biomemgr;
m_params = params;
m_csize = chunksize;
noise_heat = new Noise(¶ms->np_heat,
params->seed, m_csize.X, m_csize.Z);
noise_humidity = new Noise(¶ms->np_humidity,
params->seed, m_csize.X, m_csize.Z);
noise_heat_blend = new Noise(¶ms->np_heat_blend,
params->seed, m_csize.X, m_csize.Z);
noise_humidity_blend = new Noise(¶ms->np_humidity_blend,
params->seed, m_csize.X, m_csize.Z);
heatmap = noise_heat->result;
humidmap = noise_humidity->result;
biomemap = new biome_t[m_csize.X * m_csize.Z];
}
BiomeGenOriginal::~BiomeGenOriginal()
{
delete []biomemap;
delete noise_heat;
delete noise_humidity;
delete noise_heat_blend;
delete noise_humidity_blend;
}
Biome *BiomeGenOriginal::calcBiomeAtPoint(v3s16 pos) const
{
float heat =
NoisePerlin2D(&m_params->np_heat, pos.X, pos.Z, m_params->seed) +
NoisePerlin2D(&m_params->np_heat_blend, pos.X, pos.Z, m_params->seed);
float humidity =
NoisePerlin2D(&m_params->np_humidity, pos.X, pos.Z, m_params->seed) +
NoisePerlin2D(&m_params->np_humidity_blend, pos.X, pos.Z, m_params->seed);
return calcBiomeFromNoise(heat, humidity, pos.Y);
}
void BiomeGenOriginal::calcBiomeNoise(v3s16 pmin)
{
m_pmin = pmin;
noise_heat->perlinMap2D(pmin.X, pmin.Z);
noise_humidity->perlinMap2D(pmin.X, pmin.Z);
noise_heat_blend->perlinMap2D(pmin.X, pmin.Z);
noise_humidity_blend->perlinMap2D(pmin.X, pmin.Z);
for (s32 i = 0; i < m_csize.X * m_csize.Z; i++) {
noise_heat->result[i] += noise_heat_blend->result[i];
noise_humidity->result[i] += noise_humidity_blend->result[i];
}
}
biome_t *BiomeGenOriginal::getBiomes(s16 *heightmap)
{
for (s32 i = 0; i != m_csize.X * m_csize.Z; i++) {
Biome *biome = calcBiomeFromNoise(
noise_heat->result[i],
noise_humidity->result[i],
heightmap[i]);
biomemap[i] = biome->index;
}
return biomemap;
}
Biome *BiomeGenOriginal::getBiomeAtPoint(v3s16 pos) const
{
return getBiomeAtIndex(
(pos.Z - m_pmin.Z) * m_csize.X + (pos.X - m_pmin.X),
pos.Y);
}
Biome *BiomeGenOriginal::getBiomeAtIndex(size_t index, s16 y) const
{
return calcBiomeFromNoise(
noise_heat->result[index],
noise_humidity->result[index],
y);
}
Biome *BiomeGenOriginal::calcBiomeFromNoise(float heat, float humidity, s16 y) const
{
Biome *b, *biome_closest = NULL;
float dist_min = FLT_MAX;
for (size_t i = 1; i < m_bmgr->getNumObjects(); i++) {
b = (Biome *)m_bmgr->getRaw(i);
if (!b || y > b->y_max || y < b->y_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 : (Biome *)m_bmgr->getRaw(BIOME_NONE);
}
////////////////////////////////////////////////////////////////////////////////
void Biome::resolveNodeNames()
{
getIdFromNrBacklog(&c_top, "mapgen_stone", CONTENT_AIR);
getIdFromNrBacklog(&c_filler, "mapgen_stone", CONTENT_AIR);
getIdFromNrBacklog(&c_stone, "mapgen_stone", CONTENT_AIR);
getIdFromNrBacklog(&c_water_top, "mapgen_water_source", CONTENT_AIR);
getIdFromNrBacklog(&c_water, "mapgen_water_source", CONTENT_AIR);
getIdFromNrBacklog(&c_river_water, "mapgen_river_water_source", CONTENT_AIR);
getIdFromNrBacklog(&c_riverbed, "mapgen_stone", CONTENT_AIR);
getIdFromNrBacklog(&c_dust, "ignore", CONTENT_IGNORE);
}