3 Copyright (C) 2014-2018 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
4 Copyright (C) 2014-2018 paramat
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.
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.
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.
22 #include "mg_decoration.h"
26 #include "map.h" //for MMVManip
27 #include "util/numeric.h"
32 ///////////////////////////////////////////////////////////////////////////////
35 BiomeManager::BiomeManager(Server *server) :
36 ObjDefManager(server, OBJDEF_BIOME)
40 // Create default biome to be used in case none exist
46 b->depth_filler = -MAX_MAP_GENERATION_LIMIT;
47 b->depth_water_top = 0;
48 b->depth_riverbed = 0;
49 b->min_pos = v3s16(-MAX_MAP_GENERATION_LIMIT,
50 -MAX_MAP_GENERATION_LIMIT, -MAX_MAP_GENERATION_LIMIT);
51 b->max_pos = v3s16(MAX_MAP_GENERATION_LIMIT,
52 MAX_MAP_GENERATION_LIMIT, MAX_MAP_GENERATION_LIMIT);
54 b->humidity_point = 0.0;
55 b->vertical_blend = 0;
57 b->m_nodenames.emplace_back("mapgen_stone");
58 b->m_nodenames.emplace_back("mapgen_stone");
59 b->m_nodenames.emplace_back("mapgen_stone");
60 b->m_nodenames.emplace_back("mapgen_water_source");
61 b->m_nodenames.emplace_back("mapgen_water_source");
62 b->m_nodenames.emplace_back("mapgen_river_water_source");
63 b->m_nodenames.emplace_back("mapgen_stone");
64 b->m_nodenames.emplace_back("ignore");
65 m_ndef->pendNodeResolve(b);
71 void BiomeManager::clear()
73 EmergeManager *emerge = m_server->getEmergeManager();
75 // Remove all dangling references in Decorations
76 DecorationManager *decomgr = emerge->decomgr;
77 for (size_t i = 0; i != decomgr->getNumObjects(); i++) {
78 Decoration *deco = (Decoration *)decomgr->getRaw(i);
82 // Don't delete the first biome
83 for (size_t i = 1; i < m_objects.size(); i++)
84 delete (Biome *)m_objects[i];
90 // For BiomeGen type 'BiomeGenOriginal'
91 float BiomeManager::getHeatAtPosOriginal(v3s16 pos, NoiseParams &np_heat,
92 NoiseParams &np_heat_blend, u64 seed)
95 NoisePerlin2D(&np_heat, pos.X, pos.Z, seed) +
96 NoisePerlin2D(&np_heat_blend, pos.X, pos.Z, seed);
100 // For BiomeGen type 'BiomeGenOriginal'
101 float BiomeManager::getHumidityAtPosOriginal(v3s16 pos, NoiseParams &np_humidity,
102 NoiseParams &np_humidity_blend, u64 seed)
105 NoisePerlin2D(&np_humidity, pos.X, pos.Z, seed) +
106 NoisePerlin2D(&np_humidity_blend, pos.X, pos.Z, seed);
110 // For BiomeGen type 'BiomeGenOriginal'
111 Biome *BiomeManager::getBiomeFromNoiseOriginal(float heat, float humidity, v3s16 pos)
113 Biome *biome_closest = nullptr;
114 Biome *biome_closest_blend = nullptr;
115 float dist_min = FLT_MAX;
116 float dist_min_blend = FLT_MAX;
118 for (size_t i = 1; i < getNumObjects(); i++) {
119 Biome *b = (Biome *)getRaw(i);
121 pos.Y < b->min_pos.Y || pos.Y > b->max_pos.Y + b->vertical_blend ||
122 pos.X < b->min_pos.X || pos.X > b->max_pos.X ||
123 pos.Z < b->min_pos.Z || pos.Z > b->max_pos.Z)
126 float d_heat = heat - b->heat_point;
127 float d_humidity = humidity - b->humidity_point;
128 float dist = (d_heat * d_heat) + (d_humidity * d_humidity);
130 if (pos.Y <= b->max_pos.Y) { // Within y limits of biome b
131 if (dist < dist_min) {
135 } else if (dist < dist_min_blend) { // Blend area above biome b
136 dist_min_blend = dist;
137 biome_closest_blend = b;
141 mysrand(pos.Y + (heat + humidity) / 2);
142 if (biome_closest_blend &&
143 myrand_range(0, biome_closest_blend->vertical_blend) >=
144 pos.Y - biome_closest_blend->max_pos.Y)
145 return biome_closest_blend;
147 return (biome_closest) ? biome_closest : (Biome *)getRaw(BIOME_NONE);
151 ////////////////////////////////////////////////////////////////////////////////
153 void BiomeParamsOriginal::readParams(const Settings *settings)
155 settings->getNoiseParams("mg_biome_np_heat", np_heat);
156 settings->getNoiseParams("mg_biome_np_heat_blend", np_heat_blend);
157 settings->getNoiseParams("mg_biome_np_humidity", np_humidity);
158 settings->getNoiseParams("mg_biome_np_humidity_blend", np_humidity_blend);
162 void BiomeParamsOriginal::writeParams(Settings *settings) const
164 settings->setNoiseParams("mg_biome_np_heat", np_heat);
165 settings->setNoiseParams("mg_biome_np_heat_blend", np_heat_blend);
166 settings->setNoiseParams("mg_biome_np_humidity", np_humidity);
167 settings->setNoiseParams("mg_biome_np_humidity_blend", np_humidity_blend);
171 ////////////////////////////////////////////////////////////////////////////////
173 BiomeGenOriginal::BiomeGenOriginal(BiomeManager *biomemgr,
174 BiomeParamsOriginal *params, v3s16 chunksize)
180 noise_heat = new Noise(¶ms->np_heat,
181 params->seed, m_csize.X, m_csize.Z);
182 noise_humidity = new Noise(¶ms->np_humidity,
183 params->seed, m_csize.X, m_csize.Z);
184 noise_heat_blend = new Noise(¶ms->np_heat_blend,
185 params->seed, m_csize.X, m_csize.Z);
186 noise_humidity_blend = new Noise(¶ms->np_humidity_blend,
187 params->seed, m_csize.X, m_csize.Z);
189 heatmap = noise_heat->result;
190 humidmap = noise_humidity->result;
191 biomemap = new biome_t[m_csize.X * m_csize.Z];
194 BiomeGenOriginal::~BiomeGenOriginal()
199 delete noise_humidity;
200 delete noise_heat_blend;
201 delete noise_humidity_blend;
204 // Only usable in a mapgen thread
205 Biome *BiomeGenOriginal::calcBiomeAtPoint(v3s16 pos) const
208 NoisePerlin2D(&m_params->np_heat, pos.X, pos.Z, m_params->seed) +
209 NoisePerlin2D(&m_params->np_heat_blend, pos.X, pos.Z, m_params->seed);
211 NoisePerlin2D(&m_params->np_humidity, pos.X, pos.Z, m_params->seed) +
212 NoisePerlin2D(&m_params->np_humidity_blend, pos.X, pos.Z, m_params->seed);
214 return calcBiomeFromNoise(heat, humidity, pos);
218 void BiomeGenOriginal::calcBiomeNoise(v3s16 pmin)
222 noise_heat->perlinMap2D(pmin.X, pmin.Z);
223 noise_humidity->perlinMap2D(pmin.X, pmin.Z);
224 noise_heat_blend->perlinMap2D(pmin.X, pmin.Z);
225 noise_humidity_blend->perlinMap2D(pmin.X, pmin.Z);
227 for (s32 i = 0; i < m_csize.X * m_csize.Z; i++) {
228 noise_heat->result[i] += noise_heat_blend->result[i];
229 noise_humidity->result[i] += noise_humidity_blend->result[i];
234 biome_t *BiomeGenOriginal::getBiomes(s16 *heightmap, v3s16 pmin)
236 for (s16 zr = 0; zr < m_csize.Z; zr++)
237 for (s16 xr = 0; xr < m_csize.X; xr++) {
238 s32 i = zr * m_csize.X + xr;
239 Biome *biome = calcBiomeFromNoise(
240 noise_heat->result[i],
241 noise_humidity->result[i],
242 v3s16(pmin.X + xr, heightmap[i], pmin.Z + zr));
244 biomemap[i] = biome->index;
251 Biome *BiomeGenOriginal::getBiomeAtPoint(v3s16 pos) const
253 return getBiomeAtIndex(
254 (pos.Z - m_pmin.Z) * m_csize.X + (pos.X - m_pmin.X),
259 Biome *BiomeGenOriginal::getBiomeAtIndex(size_t index, v3s16 pos) const
261 return calcBiomeFromNoise(
262 noise_heat->result[index],
263 noise_humidity->result[index],
268 Biome *BiomeGenOriginal::calcBiomeFromNoise(float heat, float humidity, v3s16 pos) const
270 Biome *biome_closest = nullptr;
271 Biome *biome_closest_blend = nullptr;
272 float dist_min = FLT_MAX;
273 float dist_min_blend = FLT_MAX;
275 for (size_t i = 1; i < m_bmgr->getNumObjects(); i++) {
276 Biome *b = (Biome *)m_bmgr->getRaw(i);
278 pos.Y < b->min_pos.Y || pos.Y > b->max_pos.Y + b->vertical_blend ||
279 pos.X < b->min_pos.X || pos.X > b->max_pos.X ||
280 pos.Z < b->min_pos.Z || pos.Z > b->max_pos.Z)
283 float d_heat = heat - b->heat_point;
284 float d_humidity = humidity - b->humidity_point;
285 float dist = (d_heat * d_heat) + (d_humidity * d_humidity);
287 if (pos.Y <= b->max_pos.Y) { // Within y limits of biome b
288 if (dist < dist_min) {
292 } else if (dist < dist_min_blend) { // Blend area above biome b
293 dist_min_blend = dist;
294 biome_closest_blend = b;
298 // Carefully tune pseudorandom seed variation to avoid single node dither
299 // and create larger scale blending patterns similar to horizontal biome
301 mysrand(pos.Y + (heat + humidity) / 2);
303 if (biome_closest_blend &&
304 myrand_range(0, biome_closest_blend->vertical_blend) >=
305 pos.Y - biome_closest_blend->max_pos.Y)
306 return biome_closest_blend;
308 return (biome_closest) ? biome_closest : (Biome *)m_bmgr->getRaw(BIOME_NONE);
312 ////////////////////////////////////////////////////////////////////////////////
314 void Biome::resolveNodeNames()
316 getIdFromNrBacklog(&c_top, "mapgen_stone", CONTENT_AIR);
317 getIdFromNrBacklog(&c_filler, "mapgen_stone", CONTENT_AIR);
318 getIdFromNrBacklog(&c_stone, "mapgen_stone", CONTENT_AIR);
319 getIdFromNrBacklog(&c_water_top, "mapgen_water_source", CONTENT_AIR);
320 getIdFromNrBacklog(&c_water, "mapgen_water_source", CONTENT_AIR);
321 getIdFromNrBacklog(&c_river_water, "mapgen_river_water_source", CONTENT_AIR);
322 getIdFromNrBacklog(&c_riverbed, "mapgen_stone", CONTENT_AIR);
323 getIdFromNrBacklog(&c_dust, "ignore", CONTENT_IGNORE);