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_nnlistsizes.push_back(1);
67 b->m_nodenames.emplace_back("ignore");
68 b->m_nodenames.emplace_back("ignore");
69 b->m_nodenames.emplace_back("ignore");
70 m_ndef->pendNodeResolve(b);
76 void BiomeManager::clear()
78 EmergeManager *emerge = m_server->getEmergeManager();
80 // Remove all dangling references in Decorations
81 DecorationManager *decomgr = emerge->getWritableDecorationManager();
82 for (size_t i = 0; i != decomgr->getNumObjects(); i++) {
83 Decoration *deco = (Decoration *)decomgr->getRaw(i);
87 // Don't delete the first biome
88 for (size_t i = 1; i < m_objects.size(); i++)
89 delete (Biome *)m_objects[i];
95 BiomeManager *BiomeManager::clone() const
97 auto mgr = new BiomeManager();
99 ObjDefManager::cloneTo(mgr);
100 mgr->m_server = m_server;
105 // For BiomeGen type 'BiomeGenOriginal'
106 float BiomeManager::getHeatAtPosOriginal(v3s16 pos, NoiseParams &np_heat,
107 NoiseParams &np_heat_blend, u64 seed) const
110 NoisePerlin2D(&np_heat, pos.X, pos.Z, seed) +
111 NoisePerlin2D(&np_heat_blend, pos.X, pos.Z, seed);
115 // For BiomeGen type 'BiomeGenOriginal'
116 float BiomeManager::getHumidityAtPosOriginal(v3s16 pos, NoiseParams &np_humidity,
117 NoiseParams &np_humidity_blend, u64 seed) const
120 NoisePerlin2D(&np_humidity, pos.X, pos.Z, seed) +
121 NoisePerlin2D(&np_humidity_blend, pos.X, pos.Z, seed);
125 // For BiomeGen type 'BiomeGenOriginal'
126 const Biome *BiomeManager::getBiomeFromNoiseOriginal(float heat,
127 float humidity, v3s16 pos) const
129 Biome *biome_closest = nullptr;
130 Biome *biome_closest_blend = nullptr;
131 float dist_min = FLT_MAX;
132 float dist_min_blend = FLT_MAX;
134 for (size_t i = 1; i < getNumObjects(); i++) {
135 Biome *b = (Biome *)getRaw(i);
137 pos.Y < b->min_pos.Y || pos.Y > b->max_pos.Y + b->vertical_blend ||
138 pos.X < b->min_pos.X || pos.X > b->max_pos.X ||
139 pos.Z < b->min_pos.Z || pos.Z > b->max_pos.Z)
142 float d_heat = heat - b->heat_point;
143 float d_humidity = humidity - b->humidity_point;
144 float dist = (d_heat * d_heat) + (d_humidity * d_humidity);
146 if (pos.Y <= b->max_pos.Y) { // Within y limits of biome b
147 if (dist < dist_min) {
151 } else if (dist < dist_min_blend) { // Blend area above biome b
152 dist_min_blend = dist;
153 biome_closest_blend = b;
157 mysrand(pos.Y + (heat + humidity) * 0.9f);
158 if (biome_closest_blend && dist_min_blend <= dist_min &&
159 myrand_range(0, biome_closest_blend->vertical_blend) >=
160 pos.Y - biome_closest_blend->max_pos.Y)
161 return biome_closest_blend;
163 return (biome_closest) ? biome_closest : (Biome *)getRaw(BIOME_NONE);
167 ////////////////////////////////////////////////////////////////////////////////
169 void BiomeParamsOriginal::readParams(const Settings *settings)
171 settings->getNoiseParams("mg_biome_np_heat", np_heat);
172 settings->getNoiseParams("mg_biome_np_heat_blend", np_heat_blend);
173 settings->getNoiseParams("mg_biome_np_humidity", np_humidity);
174 settings->getNoiseParams("mg_biome_np_humidity_blend", np_humidity_blend);
178 void BiomeParamsOriginal::writeParams(Settings *settings) const
180 settings->setNoiseParams("mg_biome_np_heat", np_heat);
181 settings->setNoiseParams("mg_biome_np_heat_blend", np_heat_blend);
182 settings->setNoiseParams("mg_biome_np_humidity", np_humidity);
183 settings->setNoiseParams("mg_biome_np_humidity_blend", np_humidity_blend);
187 ////////////////////////////////////////////////////////////////////////////////
189 BiomeGenOriginal::BiomeGenOriginal(BiomeManager *biomemgr,
190 BiomeParamsOriginal *params, v3s16 chunksize)
196 noise_heat = new Noise(¶ms->np_heat,
197 params->seed, m_csize.X, m_csize.Z);
198 noise_humidity = new Noise(¶ms->np_humidity,
199 params->seed, m_csize.X, m_csize.Z);
200 noise_heat_blend = new Noise(¶ms->np_heat_blend,
201 params->seed, m_csize.X, m_csize.Z);
202 noise_humidity_blend = new Noise(¶ms->np_humidity_blend,
203 params->seed, m_csize.X, m_csize.Z);
205 heatmap = noise_heat->result;
206 humidmap = noise_humidity->result;
208 biomemap = new biome_t[m_csize.X * m_csize.Z];
209 // Initialise with the ID of 'BIOME_NONE' so that cavegen can get the
210 // fallback biome when biome generation (which calculates the biomemap IDs)
212 memset(biomemap, 0, sizeof(biome_t) * m_csize.X * m_csize.Z);
215 BiomeGenOriginal::~BiomeGenOriginal()
220 delete noise_humidity;
221 delete noise_heat_blend;
222 delete noise_humidity_blend;
225 // Only usable in a mapgen thread
226 Biome *BiomeGenOriginal::calcBiomeAtPoint(v3s16 pos) const
229 NoisePerlin2D(&m_params->np_heat, pos.X, pos.Z, m_params->seed) +
230 NoisePerlin2D(&m_params->np_heat_blend, pos.X, pos.Z, m_params->seed);
232 NoisePerlin2D(&m_params->np_humidity, pos.X, pos.Z, m_params->seed) +
233 NoisePerlin2D(&m_params->np_humidity_blend, pos.X, pos.Z, m_params->seed);
235 return calcBiomeFromNoise(heat, humidity, pos);
239 void BiomeGenOriginal::calcBiomeNoise(v3s16 pmin)
243 noise_heat->perlinMap2D(pmin.X, pmin.Z);
244 noise_humidity->perlinMap2D(pmin.X, pmin.Z);
245 noise_heat_blend->perlinMap2D(pmin.X, pmin.Z);
246 noise_humidity_blend->perlinMap2D(pmin.X, pmin.Z);
248 for (s32 i = 0; i < m_csize.X * m_csize.Z; i++) {
249 noise_heat->result[i] += noise_heat_blend->result[i];
250 noise_humidity->result[i] += noise_humidity_blend->result[i];
255 biome_t *BiomeGenOriginal::getBiomes(s16 *heightmap, v3s16 pmin)
257 for (s16 zr = 0; zr < m_csize.Z; zr++)
258 for (s16 xr = 0; xr < m_csize.X; xr++) {
259 s32 i = zr * m_csize.X + xr;
260 Biome *biome = calcBiomeFromNoise(
261 noise_heat->result[i],
262 noise_humidity->result[i],
263 v3s16(pmin.X + xr, heightmap[i], pmin.Z + zr));
265 biomemap[i] = biome->index;
272 Biome *BiomeGenOriginal::getBiomeAtPoint(v3s16 pos) const
274 return getBiomeAtIndex(
275 (pos.Z - m_pmin.Z) * m_csize.X + (pos.X - m_pmin.X),
280 Biome *BiomeGenOriginal::getBiomeAtIndex(size_t index, v3s16 pos) const
282 return calcBiomeFromNoise(
283 noise_heat->result[index],
284 noise_humidity->result[index],
289 Biome *BiomeGenOriginal::calcBiomeFromNoise(float heat, float humidity, v3s16 pos) const
291 Biome *biome_closest = nullptr;
292 Biome *biome_closest_blend = nullptr;
293 float dist_min = FLT_MAX;
294 float dist_min_blend = FLT_MAX;
296 for (size_t i = 1; i < m_bmgr->getNumObjects(); i++) {
297 Biome *b = (Biome *)m_bmgr->getRaw(i);
299 pos.Y < b->min_pos.Y || pos.Y > b->max_pos.Y + b->vertical_blend ||
300 pos.X < b->min_pos.X || pos.X > b->max_pos.X ||
301 pos.Z < b->min_pos.Z || pos.Z > b->max_pos.Z)
304 float d_heat = heat - b->heat_point;
305 float d_humidity = humidity - b->humidity_point;
306 float dist = (d_heat * d_heat) + (d_humidity * d_humidity);
308 if (pos.Y <= b->max_pos.Y) { // Within y limits of biome b
309 if (dist < dist_min) {
313 } else if (dist < dist_min_blend) { // Blend area above biome b
314 dist_min_blend = dist;
315 biome_closest_blend = b;
319 // Carefully tune pseudorandom seed variation to avoid single node dither
320 // and create larger scale blending patterns similar to horizontal biome
322 mysrand(pos.Y + (heat + humidity) * 0.9f);
324 if (biome_closest_blend && dist_min_blend <= dist_min &&
325 myrand_range(0, biome_closest_blend->vertical_blend) >=
326 pos.Y - biome_closest_blend->max_pos.Y)
327 return biome_closest_blend;
329 return (biome_closest) ? biome_closest : (Biome *)m_bmgr->getRaw(BIOME_NONE);
333 ////////////////////////////////////////////////////////////////////////////////
335 ObjDef *Biome::clone() const
337 auto obj = new Biome();
338 ObjDef::cloneTo(obj);
339 NodeResolver::cloneTo(obj);
344 obj->c_filler = c_filler;
345 obj->c_stone = c_stone;
346 obj->c_water_top = c_water_top;
347 obj->c_water = c_water;
348 obj->c_river_water = c_river_water;
349 obj->c_riverbed = c_riverbed;
350 obj->c_dust = c_dust;
351 obj->c_cave_liquid = c_cave_liquid;
352 obj->c_dungeon = c_dungeon;
353 obj->c_dungeon_alt = c_dungeon_alt;
354 obj->c_dungeon_stair = c_dungeon_stair;
356 obj->depth_top = depth_top;
357 obj->depth_filler = depth_filler;
358 obj->depth_water_top = depth_water_top;
359 obj->depth_riverbed = depth_riverbed;
361 obj->min_pos = min_pos;
362 obj->max_pos = max_pos;
363 obj->heat_point = heat_point;
364 obj->humidity_point = humidity_point;
365 obj->vertical_blend = vertical_blend;
370 void Biome::resolveNodeNames()
372 getIdFromNrBacklog(&c_top, "mapgen_stone", CONTENT_AIR, false);
373 getIdFromNrBacklog(&c_filler, "mapgen_stone", CONTENT_AIR, false);
374 getIdFromNrBacklog(&c_stone, "mapgen_stone", CONTENT_AIR, false);
375 getIdFromNrBacklog(&c_water_top, "mapgen_water_source", CONTENT_AIR, false);
376 getIdFromNrBacklog(&c_water, "mapgen_water_source", CONTENT_AIR, false);
377 getIdFromNrBacklog(&c_river_water, "mapgen_river_water_source", CONTENT_AIR, false);
378 getIdFromNrBacklog(&c_riverbed, "mapgen_stone", CONTENT_AIR, false);
379 getIdFromNrBacklog(&c_dust, "ignore", CONTENT_IGNORE, false);
380 getIdsFromNrBacklog(&c_cave_liquid);
381 getIdFromNrBacklog(&c_dungeon, "ignore", CONTENT_IGNORE, false);
382 getIdFromNrBacklog(&c_dungeon_alt, "ignore", CONTENT_IGNORE, false);
383 getIdFromNrBacklog(&c_dungeon_stair, "ignore", CONTENT_IGNORE, false);