Line data Source code
1 : /*
2 : Minetest
3 : Copyright (C) 2010-2015 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
4 : Copyright (C) 2010-2015 celeron55, Perttu Ahola <celeron55@gmail.com>
5 :
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.
10 :
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.
15 :
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.
19 : */
20 :
21 : #include "mapgen.h"
22 : #include "voxel.h"
23 : #include "noise.h"
24 : #include "gamedef.h"
25 : #include "mg_biome.h"
26 : #include "mapblock.h"
27 : #include "mapnode.h"
28 : #include "map.h"
29 : #include "content_sao.h"
30 : #include "nodedef.h"
31 : #include "emerge.h"
32 : #include "content_mapnode.h" // For content_mapnode_get_new_name
33 : #include "voxelalgorithms.h"
34 : #include "porting.h"
35 : #include "profiler.h"
36 : #include "settings.h"
37 : #include "treegen.h"
38 : #include "serialization.h"
39 : #include "util/serialize.h"
40 : #include "util/numeric.h"
41 : #include "filesys.h"
42 : #include "log.h"
43 :
44 : FlagDesc flagdesc_mapgen[] = {
45 : {"trees", MG_TREES},
46 : {"caves", MG_CAVES},
47 : {"dungeons", MG_DUNGEONS},
48 : {"flat", MG_FLAT},
49 : {"light", MG_LIGHT},
50 : {NULL, 0}
51 : };
52 :
53 : FlagDesc flagdesc_gennotify[] = {
54 : {"dungeon", 1 << GENNOTIFY_DUNGEON},
55 : {"temple", 1 << GENNOTIFY_TEMPLE},
56 : {"cave_begin", 1 << GENNOTIFY_CAVE_BEGIN},
57 : {"cave_end", 1 << GENNOTIFY_CAVE_END},
58 : {"large_cave_begin", 1 << GENNOTIFY_LARGECAVE_BEGIN},
59 : {"large_cave_end", 1 << GENNOTIFY_LARGECAVE_END},
60 : {"decoration", 1 << GENNOTIFY_DECORATION},
61 : {NULL, 0}
62 : };
63 :
64 :
65 : ///////////////////////////////////////////////////////////////////////////////
66 :
67 :
68 0 : Mapgen::Mapgen()
69 : {
70 0 : generating = false;
71 0 : id = -1;
72 0 : seed = 0;
73 0 : water_level = 0;
74 0 : flags = 0;
75 :
76 0 : vm = NULL;
77 0 : ndef = NULL;
78 0 : heightmap = NULL;
79 0 : biomemap = NULL;
80 0 : heatmap = NULL;
81 0 : humidmap = NULL;
82 0 : }
83 :
84 :
85 0 : Mapgen::Mapgen(int mapgenid, MapgenParams *params, EmergeManager *emerge) :
86 0 : gennotify(emerge->gen_notify_on, &emerge->gen_notify_on_deco_ids)
87 : {
88 0 : generating = false;
89 0 : id = mapgenid;
90 0 : seed = (int)params->seed;
91 0 : water_level = params->water_level;
92 0 : flags = params->flags;
93 0 : csize = v3s16(1, 1, 1) * (params->chunksize * MAP_BLOCKSIZE);
94 :
95 0 : vm = NULL;
96 0 : ndef = NULL;
97 0 : heightmap = NULL;
98 0 : biomemap = NULL;
99 0 : heatmap = NULL;
100 0 : humidmap = NULL;
101 0 : }
102 :
103 :
104 0 : Mapgen::~Mapgen()
105 : {
106 0 : }
107 :
108 :
109 0 : u32 Mapgen::getBlockSeed(v3s16 p, int seed)
110 : {
111 : return (u32)seed +
112 0 : p.Z * 38134234 +
113 0 : p.Y * 42123 +
114 0 : p.X * 23;
115 : }
116 :
117 :
118 0 : u32 Mapgen::getBlockSeed2(v3s16 p, int seed)
119 : {
120 0 : u32 n = 1619 * p.X + 31337 * p.Y + 52591 * p.Z + 1013 * seed;
121 0 : n = (n >> 13) ^ n;
122 0 : return (n * (n * n * 60493 + 19990303) + 1376312589);
123 : }
124 :
125 :
126 : // Returns Y one under area minimum if not found
127 0 : s16 Mapgen::findGroundLevelFull(v2s16 p2d)
128 : {
129 0 : v3s16 em = vm->m_area.getExtent();
130 0 : s16 y_nodes_max = vm->m_area.MaxEdge.Y;
131 0 : s16 y_nodes_min = vm->m_area.MinEdge.Y;
132 0 : u32 i = vm->m_area.index(p2d.X, y_nodes_max, p2d.Y);
133 : s16 y;
134 :
135 0 : for (y = y_nodes_max; y >= y_nodes_min; y--) {
136 0 : MapNode &n = vm->m_data[i];
137 0 : if (ndef->get(n).walkable)
138 0 : break;
139 :
140 0 : vm->m_area.add_y(em, i, -1);
141 : }
142 0 : return (y >= y_nodes_min) ? y : y_nodes_min - 1;
143 : }
144 :
145 :
146 : // Returns -MAP_GENERATION_LIMIT if not found
147 0 : s16 Mapgen::findGroundLevel(v2s16 p2d, s16 ymin, s16 ymax)
148 : {
149 0 : v3s16 em = vm->m_area.getExtent();
150 0 : u32 i = vm->m_area.index(p2d.X, ymax, p2d.Y);
151 : s16 y;
152 :
153 0 : for (y = ymax; y >= ymin; y--) {
154 0 : MapNode &n = vm->m_data[i];
155 0 : if (ndef->get(n).walkable)
156 0 : break;
157 :
158 0 : vm->m_area.add_y(em, i, -1);
159 : }
160 0 : return (y >= ymin) ? y : -MAP_GENERATION_LIMIT;
161 : }
162 :
163 :
164 0 : void Mapgen::updateHeightmap(v3s16 nmin, v3s16 nmax)
165 : {
166 0 : if (!heightmap)
167 0 : return;
168 :
169 : //TimeTaker t("Mapgen::updateHeightmap", NULL, PRECISION_MICRO);
170 0 : int index = 0;
171 0 : for (s16 z = nmin.Z; z <= nmax.Z; z++) {
172 0 : for (s16 x = nmin.X; x <= nmax.X; x++, index++) {
173 0 : s16 y = findGroundLevel(v2s16(x, z), nmin.Y, nmax.Y);
174 :
175 0 : heightmap[index] = y;
176 : }
177 : }
178 : //printf("updateHeightmap: %dus\n", t.stop());
179 : }
180 :
181 :
182 0 : void Mapgen::updateLiquid(UniqueQueue<v3s16> *trans_liquid, v3s16 nmin, v3s16 nmax)
183 : {
184 : bool isliquid, wasliquid;
185 0 : v3s16 em = vm->m_area.getExtent();
186 :
187 0 : for (s16 z = nmin.Z; z <= nmax.Z; z++) {
188 0 : for (s16 x = nmin.X; x <= nmax.X; x++) {
189 0 : wasliquid = true;
190 :
191 0 : u32 i = vm->m_area.index(x, nmax.Y, z);
192 0 : for (s16 y = nmax.Y; y >= nmin.Y; y--) {
193 0 : isliquid = ndef->get(vm->m_data[i]).isLiquid();
194 :
195 : // there was a change between liquid and nonliquid, add to queue.
196 0 : if (isliquid != wasliquid)
197 0 : trans_liquid->push_back(v3s16(x, y, z));
198 :
199 0 : wasliquid = isliquid;
200 0 : vm->m_area.add_y(em, i, -1);
201 : }
202 : }
203 : }
204 0 : }
205 :
206 :
207 0 : void Mapgen::setLighting(u8 light, v3s16 nmin, v3s16 nmax)
208 : {
209 0 : ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);
210 0 : VoxelArea a(nmin, nmax);
211 :
212 0 : for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
213 0 : for (int y = a.MinEdge.Y; y <= a.MaxEdge.Y; y++) {
214 0 : u32 i = vm->m_area.index(a.MinEdge.X, y, z);
215 0 : for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++, i++)
216 0 : vm->m_data[i].param1 = light;
217 : }
218 : }
219 0 : }
220 :
221 :
222 0 : void Mapgen::lightSpread(VoxelArea &a, v3s16 p, u8 light)
223 : {
224 0 : if (light <= 1 || !a.contains(p))
225 0 : return;
226 :
227 0 : u32 vi = vm->m_area.index(p);
228 0 : MapNode &nn = vm->m_data[vi];
229 :
230 0 : light--;
231 : // should probably compare masked, but doesn't seem to make a difference
232 0 : if (light <= nn.param1 || !ndef->get(nn).light_propagates)
233 0 : return;
234 :
235 0 : nn.param1 = light;
236 :
237 0 : lightSpread(a, p + v3s16(0, 0, 1), light);
238 0 : lightSpread(a, p + v3s16(0, 1, 0), light);
239 0 : lightSpread(a, p + v3s16(1, 0, 0), light);
240 0 : lightSpread(a, p - v3s16(0, 0, 1), light);
241 0 : lightSpread(a, p - v3s16(0, 1, 0), light);
242 0 : lightSpread(a, p - v3s16(1, 0, 0), light);
243 : }
244 :
245 :
246 0 : void Mapgen::calcLighting(v3s16 nmin, v3s16 nmax, v3s16 full_nmin, v3s16 full_nmax)
247 : {
248 0 : ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);
249 : //TimeTaker t("updateLighting");
250 :
251 0 : propagateSunlight(nmin, nmax);
252 0 : spreadLight(full_nmin, full_nmax);
253 :
254 : //printf("updateLighting: %dms\n", t.stop());
255 0 : }
256 :
257 :
258 :
259 0 : void Mapgen::calcLighting(v3s16 nmin, v3s16 nmax)
260 : {
261 0 : ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);
262 : //TimeTaker t("updateLighting");
263 :
264 : propagateSunlight(
265 0 : nmin - v3s16(1, 1, 1) * MAP_BLOCKSIZE,
266 0 : nmax + v3s16(1, 0, 1) * MAP_BLOCKSIZE);
267 :
268 : spreadLight(
269 0 : nmin - v3s16(1, 1, 1) * MAP_BLOCKSIZE,
270 0 : nmax + v3s16(1, 1, 1) * MAP_BLOCKSIZE);
271 :
272 : //printf("updateLighting: %dms\n", t.stop());
273 0 : }
274 :
275 :
276 0 : void Mapgen::propagateSunlight(v3s16 nmin, v3s16 nmax)
277 : {
278 : //TimeTaker t("propagateSunlight");
279 0 : VoxelArea a(nmin, nmax);
280 0 : bool block_is_underground = (water_level >= nmax.Y);
281 0 : v3s16 em = vm->m_area.getExtent();
282 :
283 0 : for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
284 0 : for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++) {
285 : // see if we can get a light value from the overtop
286 0 : u32 i = vm->m_area.index(x, a.MaxEdge.Y + 1, z);
287 0 : if (vm->m_data[i].getContent() == CONTENT_IGNORE) {
288 0 : if (block_is_underground)
289 0 : continue;
290 0 : } else if ((vm->m_data[i].param1 & 0x0F) != LIGHT_SUN) {
291 0 : continue;
292 : }
293 0 : vm->m_area.add_y(em, i, -1);
294 :
295 0 : for (int y = a.MaxEdge.Y; y >= a.MinEdge.Y; y--) {
296 0 : MapNode &n = vm->m_data[i];
297 0 : if (!ndef->get(n).sunlight_propagates)
298 0 : break;
299 0 : n.param1 = LIGHT_SUN;
300 0 : vm->m_area.add_y(em, i, -1);
301 : }
302 : }
303 : }
304 : //printf("propagateSunlight: %dms\n", t.stop());
305 0 : }
306 :
307 :
308 :
309 0 : void Mapgen::spreadLight(v3s16 nmin, v3s16 nmax)
310 : {
311 : //TimeTaker t("spreadLight");
312 0 : VoxelArea a(nmin, nmax);
313 :
314 0 : for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
315 0 : for (int y = a.MinEdge.Y; y <= a.MaxEdge.Y; y++) {
316 0 : u32 i = vm->m_area.index(a.MinEdge.X, y, z);
317 0 : for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++, i++) {
318 0 : MapNode &n = vm->m_data[i];
319 0 : if (n.getContent() == CONTENT_IGNORE ||
320 0 : !ndef->get(n).light_propagates)
321 0 : continue;
322 :
323 0 : u8 light_produced = ndef->get(n).light_source & 0x0F;
324 0 : if (light_produced)
325 0 : n.param1 = light_produced;
326 :
327 0 : u8 light = n.param1 & 0x0F;
328 0 : if (light) {
329 0 : lightSpread(a, v3s16(x, y, z + 1), light);
330 0 : lightSpread(a, v3s16(x, y + 1, z ), light);
331 0 : lightSpread(a, v3s16(x + 1, y, z ), light);
332 0 : lightSpread(a, v3s16(x, y, z - 1), light);
333 0 : lightSpread(a, v3s16(x, y - 1, z ), light);
334 0 : lightSpread(a, v3s16(x - 1, y, z ), light);
335 : }
336 : }
337 : }
338 : }
339 :
340 : //printf("spreadLight: %dms\n", t.stop());
341 0 : }
342 :
343 :
344 :
345 0 : void Mapgen::calcLightingOld(v3s16 nmin, v3s16 nmax)
346 : {
347 0 : enum LightBank banks[2] = {LIGHTBANK_DAY, LIGHTBANK_NIGHT};
348 0 : VoxelArea a(nmin, nmax);
349 0 : bool block_is_underground = (water_level > nmax.Y);
350 0 : bool sunlight = !block_is_underground;
351 :
352 0 : ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);
353 :
354 0 : for (int i = 0; i < 2; i++) {
355 0 : enum LightBank bank = banks[i];
356 0 : std::set<v3s16> light_sources;
357 0 : std::map<v3s16, u8> unlight_from;
358 :
359 0 : voxalgo::clearLightAndCollectSources(*vm, a, bank, ndef,
360 0 : light_sources, unlight_from);
361 0 : voxalgo::propagateSunlight(*vm, a, sunlight, light_sources, ndef);
362 :
363 0 : vm->unspreadLight(bank, unlight_from, light_sources, ndef);
364 0 : vm->spreadLight(bank, light_sources, ndef);
365 : }
366 0 : }
367 :
368 :
369 : ///////////////////////////////////////////////////////////////////////////////
370 :
371 0 : GenerateNotifier::GenerateNotifier()
372 : {
373 0 : m_notify_on = 0;
374 0 : }
375 :
376 :
377 0 : GenerateNotifier::GenerateNotifier(u32 notify_on,
378 0 : std::set<u32> *notify_on_deco_ids)
379 : {
380 0 : m_notify_on = notify_on;
381 0 : m_notify_on_deco_ids = notify_on_deco_ids;
382 0 : }
383 :
384 :
385 0 : void GenerateNotifier::setNotifyOn(u32 notify_on)
386 : {
387 0 : m_notify_on = notify_on;
388 0 : }
389 :
390 :
391 0 : void GenerateNotifier::setNotifyOnDecoIds(std::set<u32> *notify_on_deco_ids)
392 : {
393 0 : m_notify_on_deco_ids = notify_on_deco_ids;
394 0 : }
395 :
396 :
397 0 : bool GenerateNotifier::addEvent(GenNotifyType type, v3s16 pos, u32 id)
398 : {
399 0 : if (!(m_notify_on & (1 << type)))
400 0 : return false;
401 :
402 0 : if (type == GENNOTIFY_DECORATION &&
403 0 : m_notify_on_deco_ids->find(id) == m_notify_on_deco_ids->end())
404 0 : return false;
405 :
406 0 : GenNotifyEvent gne;
407 0 : gne.type = type;
408 0 : gne.pos = pos;
409 0 : gne.id = id;
410 0 : m_notify_events.push_back(gne);
411 :
412 0 : return true;
413 : }
414 :
415 :
416 0 : void GenerateNotifier::getEvents(
417 : std::map<std::string, std::vector<v3s16> > &event_map,
418 : bool peek_events)
419 : {
420 0 : std::list<GenNotifyEvent>::iterator it;
421 :
422 0 : for (it = m_notify_events.begin(); it != m_notify_events.end(); ++it) {
423 0 : GenNotifyEvent &gn = *it;
424 0 : std::string name = (gn.type == GENNOTIFY_DECORATION) ?
425 0 : "decoration#"+ itos(gn.id) :
426 0 : flagdesc_gennotify[gn.type].name;
427 :
428 0 : event_map[name].push_back(gn.pos);
429 : }
430 :
431 0 : if (!peek_events)
432 0 : m_notify_events.clear();
433 0 : }
434 :
435 : ///////////////////////////////////////////////////////////////////////////////
436 :
437 0 : void MapgenParams::load(const Settings &settings)
438 : {
439 0 : std::string seed_str;
440 0 : const char *seed_name = (&settings == g_settings) ? "fixed_map_seed" : "seed";
441 :
442 0 : if (settings.getNoEx(seed_name, seed_str) && !seed_str.empty())
443 0 : seed = read_seed(seed_str.c_str());
444 : else
445 0 : myrand_bytes(&seed, sizeof(seed));
446 :
447 0 : settings.getNoEx("mg_name", mg_name);
448 0 : settings.getS16NoEx("water_level", water_level);
449 0 : settings.getS16NoEx("chunksize", chunksize);
450 0 : settings.getFlagStrNoEx("mg_flags", flags, flagdesc_mapgen);
451 0 : settings.getNoiseParams("mg_biome_np_heat", np_biome_heat);
452 0 : settings.getNoiseParams("mg_biome_np_heat_blend", np_biome_heat_blend);
453 0 : settings.getNoiseParams("mg_biome_np_humidity", np_biome_humidity);
454 0 : settings.getNoiseParams("mg_biome_np_humidity_blend", np_biome_humidity_blend);
455 :
456 0 : delete sparams;
457 0 : sparams = EmergeManager::createMapgenParams(mg_name);
458 0 : if (sparams)
459 0 : sparams->readParams(&settings);
460 0 : }
461 :
462 :
463 0 : void MapgenParams::save(Settings &settings) const
464 : {
465 0 : settings.set("mg_name", mg_name);
466 0 : settings.setU64("seed", seed);
467 0 : settings.setS16("water_level", water_level);
468 0 : settings.setS16("chunksize", chunksize);
469 0 : settings.setFlagStr("mg_flags", flags, flagdesc_mapgen, (u32)-1);
470 0 : settings.setNoiseParams("mg_biome_np_heat", np_biome_heat);
471 0 : settings.setNoiseParams("mg_biome_np_heat_blend", np_biome_heat_blend);
472 0 : settings.setNoiseParams("mg_biome_np_humidity", np_biome_humidity);
473 0 : settings.setNoiseParams("mg_biome_np_humidity_blend", np_biome_humidity_blend);
474 :
475 0 : if (sparams)
476 0 : sparams->writeParams(&settings);
477 3 : }
478 :
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