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 b->m_nodenames.emplace_back("ignore");
66 b->m_nodenames.emplace_back("ignore");
67 b->m_nodenames.emplace_back("ignore");
68 b->m_nodenames.emplace_back("ignore");
69 m_ndef->pendNodeResolve(b);
75 void BiomeManager::clear()
77 EmergeManager *emerge = m_server->getEmergeManager();
79 // Remove all dangling references in Decorations
80 DecorationManager *decomgr = emerge->decomgr;
81 for (size_t i = 0; i != decomgr->getNumObjects(); i++) {
82 Decoration *deco = (Decoration *)decomgr->getRaw(i);
86 // Don't delete the first biome
87 for (size_t i = 1; i < m_objects.size(); i++)
88 delete (Biome *)m_objects[i];
94 // For BiomeGen type 'BiomeGenOriginal'
95 float BiomeManager::getHeatAtPosOriginal(v3s16 pos, NoiseParams &np_heat,
96 NoiseParams &np_heat_blend, u64 seed)
99 NoisePerlin2D(&np_heat, pos.X, pos.Z, seed) +
100 NoisePerlin2D(&np_heat_blend, pos.X, pos.Z, seed);
104 // For BiomeGen type 'BiomeGenOriginal'
105 float BiomeManager::getHumidityAtPosOriginal(v3s16 pos, NoiseParams &np_humidity,
106 NoiseParams &np_humidity_blend, u64 seed)
109 NoisePerlin2D(&np_humidity, pos.X, pos.Z, seed) +
110 NoisePerlin2D(&np_humidity_blend, pos.X, pos.Z, seed);
114 // For BiomeGen type 'BiomeGenOriginal'
115 Biome *BiomeManager::getBiomeFromNoiseOriginal(float heat, float humidity, v3s16 pos)
117 Biome *biome_closest = nullptr;
118 Biome *biome_closest_blend = nullptr;
119 float dist_min = FLT_MAX;
120 float dist_min_blend = FLT_MAX;
122 for (size_t i = 1; i < getNumObjects(); i++) {
123 Biome *b = (Biome *)getRaw(i);
125 pos.Y < b->min_pos.Y || pos.Y > b->max_pos.Y + b->vertical_blend ||
126 pos.X < b->min_pos.X || pos.X > b->max_pos.X ||
127 pos.Z < b->min_pos.Z || pos.Z > b->max_pos.Z)
130 float d_heat = heat - b->heat_point;
131 float d_humidity = humidity - b->humidity_point;
132 float dist = (d_heat * d_heat) + (d_humidity * d_humidity);
134 if (pos.Y <= b->max_pos.Y) { // Within y limits of biome b
135 if (dist < dist_min) {
139 } else if (dist < dist_min_blend) { // Blend area above biome b
140 dist_min_blend = dist;
141 biome_closest_blend = b;
145 mysrand(pos.Y + (heat + humidity) * 0.9f);
146 if (biome_closest_blend && dist_min_blend <= dist_min &&
147 myrand_range(0, biome_closest_blend->vertical_blend) >=
148 pos.Y - biome_closest_blend->max_pos.Y)
149 return biome_closest_blend;
151 return (biome_closest) ? biome_closest : (Biome *)getRaw(BIOME_NONE);
155 ////////////////////////////////////////////////////////////////////////////////
157 void BiomeParamsOriginal::readParams(const Settings *settings)
159 settings->getNoiseParams("mg_biome_np_heat", np_heat);
160 settings->getNoiseParams("mg_biome_np_heat_blend", np_heat_blend);
161 settings->getNoiseParams("mg_biome_np_humidity", np_humidity);
162 settings->getNoiseParams("mg_biome_np_humidity_blend", np_humidity_blend);
166 void BiomeParamsOriginal::writeParams(Settings *settings) const
168 settings->setNoiseParams("mg_biome_np_heat", np_heat);
169 settings->setNoiseParams("mg_biome_np_heat_blend", np_heat_blend);
170 settings->setNoiseParams("mg_biome_np_humidity", np_humidity);
171 settings->setNoiseParams("mg_biome_np_humidity_blend", np_humidity_blend);
175 ////////////////////////////////////////////////////////////////////////////////
177 BiomeGenOriginal::BiomeGenOriginal(BiomeManager *biomemgr,
178 BiomeParamsOriginal *params, v3s16 chunksize)
184 noise_heat = new Noise(¶ms->np_heat,
185 params->seed, m_csize.X, m_csize.Z);
186 noise_humidity = new Noise(¶ms->np_humidity,
187 params->seed, m_csize.X, m_csize.Z);
188 noise_heat_blend = new Noise(¶ms->np_heat_blend,
189 params->seed, m_csize.X, m_csize.Z);
190 noise_humidity_blend = new Noise(¶ms->np_humidity_blend,
191 params->seed, m_csize.X, m_csize.Z);
193 heatmap = noise_heat->result;
194 humidmap = noise_humidity->result;
196 biomemap = new biome_t[m_csize.X * m_csize.Z];
197 // Initialise with the ID of 'BIOME_NONE' so that cavegen can get the
198 // fallback biome when biome generation (which calculates the biomemap IDs)
200 memset(biomemap, 0, sizeof(biome_t) * m_csize.X * m_csize.Z);
203 BiomeGenOriginal::~BiomeGenOriginal()
208 delete noise_humidity;
209 delete noise_heat_blend;
210 delete noise_humidity_blend;
213 // Only usable in a mapgen thread
214 Biome *BiomeGenOriginal::calcBiomeAtPoint(v3s16 pos) const
217 NoisePerlin2D(&m_params->np_heat, pos.X, pos.Z, m_params->seed) +
218 NoisePerlin2D(&m_params->np_heat_blend, pos.X, pos.Z, m_params->seed);
220 NoisePerlin2D(&m_params->np_humidity, pos.X, pos.Z, m_params->seed) +
221 NoisePerlin2D(&m_params->np_humidity_blend, pos.X, pos.Z, m_params->seed);
223 return calcBiomeFromNoise(heat, humidity, pos);
227 void BiomeGenOriginal::calcBiomeNoise(v3s16 pmin)
231 noise_heat->perlinMap2D(pmin.X, pmin.Z);
232 noise_humidity->perlinMap2D(pmin.X, pmin.Z);
233 noise_heat_blend->perlinMap2D(pmin.X, pmin.Z);
234 noise_humidity_blend->perlinMap2D(pmin.X, pmin.Z);
236 for (s32 i = 0; i < m_csize.X * m_csize.Z; i++) {
237 noise_heat->result[i] += noise_heat_blend->result[i];
238 noise_humidity->result[i] += noise_humidity_blend->result[i];
243 biome_t *BiomeGenOriginal::getBiomes(s16 *heightmap, v3s16 pmin)
245 for (s16 zr = 0; zr < m_csize.Z; zr++)
246 for (s16 xr = 0; xr < m_csize.X; xr++) {
247 s32 i = zr * m_csize.X + xr;
248 Biome *biome = calcBiomeFromNoise(
249 noise_heat->result[i],
250 noise_humidity->result[i],
251 v3s16(pmin.X + xr, heightmap[i], pmin.Z + zr));
253 biomemap[i] = biome->index;
260 Biome *BiomeGenOriginal::getBiomeAtPoint(v3s16 pos) const
262 return getBiomeAtIndex(
263 (pos.Z - m_pmin.Z) * m_csize.X + (pos.X - m_pmin.X),
268 Biome *BiomeGenOriginal::getBiomeAtIndex(size_t index, v3s16 pos) const
270 return calcBiomeFromNoise(
271 noise_heat->result[index],
272 noise_humidity->result[index],
277 Biome *BiomeGenOriginal::calcBiomeFromNoise(float heat, float humidity, v3s16 pos) const
279 Biome *biome_closest = nullptr;
280 Biome *biome_closest_blend = nullptr;
281 float dist_min = FLT_MAX;
282 float dist_min_blend = FLT_MAX;
284 for (size_t i = 1; i < m_bmgr->getNumObjects(); i++) {
285 Biome *b = (Biome *)m_bmgr->getRaw(i);
287 pos.Y < b->min_pos.Y || pos.Y > b->max_pos.Y + b->vertical_blend ||
288 pos.X < b->min_pos.X || pos.X > b->max_pos.X ||
289 pos.Z < b->min_pos.Z || pos.Z > b->max_pos.Z)
292 float d_heat = heat - b->heat_point;
293 float d_humidity = humidity - b->humidity_point;
294 float dist = (d_heat * d_heat) + (d_humidity * d_humidity);
296 if (pos.Y <= b->max_pos.Y) { // Within y limits of biome b
297 if (dist < dist_min) {
301 } else if (dist < dist_min_blend) { // Blend area above biome b
302 dist_min_blend = dist;
303 biome_closest_blend = b;
307 // Carefully tune pseudorandom seed variation to avoid single node dither
308 // and create larger scale blending patterns similar to horizontal biome
310 mysrand(pos.Y + (heat + humidity) * 0.9f);
312 if (biome_closest_blend && dist_min_blend <= dist_min &&
313 myrand_range(0, biome_closest_blend->vertical_blend) >=
314 pos.Y - biome_closest_blend->max_pos.Y)
315 return biome_closest_blend;
317 return (biome_closest) ? biome_closest : (Biome *)m_bmgr->getRaw(BIOME_NONE);
321 ////////////////////////////////////////////////////////////////////////////////
323 void Biome::resolveNodeNames()
325 getIdFromNrBacklog(&c_top, "mapgen_stone", CONTENT_AIR, false);
326 getIdFromNrBacklog(&c_filler, "mapgen_stone", CONTENT_AIR, false);
327 getIdFromNrBacklog(&c_stone, "mapgen_stone", CONTENT_AIR, false);
328 getIdFromNrBacklog(&c_water_top, "mapgen_water_source", CONTENT_AIR, false);
329 getIdFromNrBacklog(&c_water, "mapgen_water_source", CONTENT_AIR, false);
330 getIdFromNrBacklog(&c_river_water, "mapgen_river_water_source", CONTENT_AIR, false);
331 getIdFromNrBacklog(&c_riverbed, "mapgen_stone", CONTENT_AIR, false);
332 getIdFromNrBacklog(&c_dust, "ignore", CONTENT_IGNORE, false);
333 getIdFromNrBacklog(&c_cave_liquid, "ignore", CONTENT_IGNORE, false);
334 getIdFromNrBacklog(&c_dungeon, "ignore", CONTENT_IGNORE, false);
335 getIdFromNrBacklog(&c_dungeon_alt, "ignore", CONTENT_IGNORE, false);
336 getIdFromNrBacklog(&c_dungeon_stair, "ignore", CONTENT_IGNORE, false);