]> git.lizzy.rs Git - minetest.git/blob - src/mg_decoration.cpp
Remove get_noiseparams function. read_noiseparams should be used from now on
[minetest.git] / src / mg_decoration.cpp
1 /*
2 Minetest
3 Copyright (C) 2010-2014 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as published by
7 the Free Software Foundation; either version 2.1 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13 GNU Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 */
19
20 #include "mg_decoration.h"
21 #include "mg_schematic.h"
22 #include "mapgen.h"
23 #include "noise.h"
24 #include "map.h"
25 #include "log.h"
26 #include "util/numeric.h"
27
28 const char *DecorationManager::ELEMENT_TITLE = "decoration";
29
30 FlagDesc flagdesc_deco[] = {
31         {"place_center_x", DECO_PLACE_CENTER_X},
32         {"place_center_y", DECO_PLACE_CENTER_Y},
33         {"place_center_z", DECO_PLACE_CENTER_Z},
34         {NULL,             0}
35 };
36
37
38 ///////////////////////////////////////////////////////////////////////////////
39
40
41 size_t DecorationManager::placeAllDecos(Mapgen *mg, u32 seed, v3s16 nmin, v3s16 nmax)
42 {
43         size_t nplaced = 0;
44
45         for (size_t i = 0; i != m_elements.size(); i++) {
46                 Decoration *deco = (Decoration *)m_elements[i];
47                 if (!deco)
48                         continue;
49
50                 nplaced += deco->placeDeco(mg, seed, nmin, nmax);
51                 seed++;
52         }
53
54         return nplaced;
55 }
56
57
58 ///////////////////////////////////////////////////////////////////////////////
59
60
61 Decoration::Decoration()
62 {
63         mapseed    = 0;
64         fill_ratio = 0;
65         sidelen    = 1;
66         flags      = 0;
67 }
68
69
70 Decoration::~Decoration()
71 {
72 }
73
74
75 size_t Decoration::placeDeco(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax)
76 {
77         PseudoRandom ps(blockseed + 53);
78         int carea_size = nmax.X - nmin.X + 1;
79
80         // Divide area into parts
81         if (carea_size % sidelen) {
82                 errorstream << "Decoration::placeDeco: chunk size is not divisible by "
83                         "sidelen; setting sidelen to " << carea_size << std::endl;
84                 sidelen = carea_size;
85         }
86
87         s16 divlen = carea_size / sidelen;
88         int area = sidelen * sidelen;
89
90         for (s16 z0 = 0; z0 < divlen; z0++)
91         for (s16 x0 = 0; x0 < divlen; x0++) {
92                 v2s16 p2d_center( // Center position of part of division
93                         nmin.X + sidelen / 2 + sidelen * x0,
94                         nmin.Z + sidelen / 2 + sidelen * z0
95                 );
96                 v2s16 p2d_min( // Minimum edge of part of division
97                         nmin.X + sidelen * x0,
98                         nmin.Z + sidelen * z0
99                 );
100                 v2s16 p2d_max( // Maximum edge of part of division
101                         nmin.X + sidelen + sidelen * x0 - 1,
102                         nmin.Z + sidelen + sidelen * z0 - 1
103                 );
104
105                 // Amount of decorations
106                 float nval = (flags & DECO_USE_NOISE) ?
107                         NoisePerlin2D(&np, p2d_center.X, p2d_center.Y, mapseed) :
108                         fill_ratio;
109                 u32 deco_count = area * MYMAX(nval, 0.f);
110
111                 for (u32 i = 0; i < deco_count; i++) {
112                         s16 x = ps.range(p2d_min.X, p2d_max.X);
113                         s16 z = ps.range(p2d_min.Y, p2d_max.Y);
114
115                         int mapindex = carea_size * (z - nmin.Z) + (x - nmin.X);
116
117                         s16 y = mg->heightmap ?
118                                         mg->heightmap[mapindex] :
119                                         mg->findGroundLevel(v2s16(x, z), nmin.Y, nmax.Y);
120
121                         if (y < nmin.Y || y > nmax.Y)
122                                 continue;
123
124                         int height = getHeight();
125                         int max_y = nmax.Y;// + MAP_BLOCKSIZE - 1;
126                         if (y + 1 + height > max_y) {
127                                 continue;
128 #if 0
129                                 printf("Decoration at (%d %d %d) cut off\n", x, y, z);
130                                 //add to queue
131                                 JMutexAutoLock cutofflock(cutoff_mutex);
132                                 cutoffs.push_back(CutoffData(x, y, z, height));
133 #endif
134                         }
135
136                         if (mg->biomemap) {
137                                 std::set<u8>::iterator iter;
138
139                                 if (biomes.size()) {
140                                         iter = biomes.find(mg->biomemap[mapindex]);
141                                         if (iter == biomes.end())
142                                                 continue;
143                                 }
144                         }
145
146                         v3s16 pos(x, y, z);
147                         if (generate(mg, &ps, max_y, pos))
148                                 mg->gennotify.addEvent(GENNOTIFY_DECORATION, pos, id);
149                 }
150         }
151
152         return 0;
153 }
154
155
156 #if 0
157 void Decoration::placeCutoffs(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax)
158 {
159         PseudoRandom pr(blockseed + 53);
160         std::vector<CutoffData> handled_cutoffs;
161
162         // Copy over the cutoffs we're interested in so we don't needlessly hold a lock
163         {
164                 JMutexAutoLock cutofflock(cutoff_mutex);
165                 for (std::list<CutoffData>::iterator i = cutoffs.begin();
166                         i != cutoffs.end(); ++i) {
167                         CutoffData cutoff = *i;
168                         v3s16 p    = cutoff.p;
169                         s16 height = cutoff.height;
170                         if (p.X < nmin.X || p.X > nmax.X ||
171                                 p.Z < nmin.Z || p.Z > nmax.Z)
172                                 continue;
173                         if (p.Y + height < nmin.Y || p.Y > nmax.Y)
174                                 continue;
175
176                         handled_cutoffs.push_back(cutoff);
177                 }
178         }
179
180         // Generate the cutoffs
181         for (size_t i = 0; i != handled_cutoffs.size(); i++) {
182                 v3s16 p    = handled_cutoffs[i].p;
183                 s16 height = handled_cutoffs[i].height;
184
185                 if (p.Y + height > nmax.Y) {
186                         //printf("Decoration at (%d %d %d) cut off again!\n", p.X, p.Y, p.Z);
187                         cuttoffs.push_back(v3s16(p.X, p.Y, p.Z));
188                 }
189
190                 generate(mg, &pr, nmax.Y, nmin.Y - p.Y, v3s16(p.X, nmin.Y, p.Z));
191         }
192
193         // Remove cutoffs that were handled from the cutoff list
194         {
195                 JMutexAutoLock cutofflock(cutoff_mutex);
196                 for (std::list<CutoffData>::iterator i = cutoffs.begin();
197                         i != cutoffs.end(); ++i) {
198
199                         for (size_t j = 0; j != handled_cutoffs.size(); j++) {
200                                 CutoffData coff = *i;
201                                 if (coff.p == handled_cutoffs[j].p)
202                                         i = cutoffs.erase(i);
203                         }
204                 }
205         }
206 }
207 #endif
208
209
210 ///////////////////////////////////////////////////////////////////////////////
211
212
213 bool DecoSimple::canPlaceDecoration(ManualMapVoxelManipulator *vm, v3s16 p)
214 {
215         // Don't bother if there aren't any decorations to place
216         if (c_decos.size() == 0)
217                 return false;
218
219         u32 vi = vm->m_area.index(p);
220
221         // Check if the decoration can be placed on this node
222         if (!CONTAINS(c_place_on, vm->m_data[vi].getContent()))
223                 return false;
224
225         // Don't continue if there are no spawnby constraints
226         if (nspawnby == -1)
227                 return true;
228
229         int nneighs = 0;
230         v3s16 dirs[8] = {
231                 v3s16( 0, 0,  1),
232                 v3s16( 0, 0, -1),
233                 v3s16( 1, 0,  0),
234                 v3s16(-1, 0,  0),
235                 v3s16( 1, 0,  1),
236                 v3s16(-1, 0,  1),
237                 v3s16(-1, 0, -1),
238                 v3s16( 1, 0, -1)
239         };
240
241         // Check a Moore neighborhood if there are enough spawnby nodes
242         for (size_t i = 0; i != ARRLEN(dirs); i++) {
243                 u32 index = vm->m_area.index(p + dirs[i]);
244                 if (!vm->m_area.contains(index))
245                         continue;
246
247                 if (CONTAINS(c_spawnby, vm->m_data[index].getContent()))
248                         nneighs++;
249         }
250
251         if (nneighs < nspawnby)
252                 return false;
253
254         return true;
255 }
256
257
258 size_t DecoSimple::generate(Mapgen *mg, PseudoRandom *pr, s16 max_y, v3s16 p)
259 {
260         ManualMapVoxelManipulator *vm = mg->vm;
261
262         if (!canPlaceDecoration(vm, p))
263                 return 0;
264
265         content_t c_place = c_decos[pr->range(0, c_decos.size() - 1)];
266
267         s16 height = (deco_height_max > 0) ?
268                 pr->range(deco_height, deco_height_max) : deco_height;
269
270         height = MYMIN(height, max_y - p.Y);
271
272         v3s16 em = vm->m_area.getExtent();
273         u32 vi = vm->m_area.index(p);
274         for (int i = 0; i < height; i++) {
275                 vm->m_area.add_y(em, vi, 1);
276
277                 content_t c = vm->m_data[vi].getContent();
278                 if (c != CONTENT_AIR && c != CONTENT_IGNORE)
279                         break;
280
281                 vm->m_data[vi] = MapNode(c_place);
282         }
283
284         return 1;
285 }
286
287
288 int DecoSimple::getHeight()
289 {
290         return (deco_height_max > 0) ? deco_height_max : deco_height;
291 }
292
293
294 ///////////////////////////////////////////////////////////////////////////////
295
296
297 size_t DecoSchematic::generate(Mapgen *mg, PseudoRandom *pr, s16 max_y, v3s16 p)
298 {
299         ManualMapVoxelManipulator *vm = mg->vm;
300
301         if (flags & DECO_PLACE_CENTER_X)
302                 p.X -= (schematic->size.X + 1) / 2;
303         if (flags & DECO_PLACE_CENTER_Y)
304                 p.Y -= (schematic->size.Y + 1) / 2;
305         if (flags & DECO_PLACE_CENTER_Z)
306                 p.Z -= (schematic->size.Z + 1) / 2;
307
308         u32 vi = vm->m_area.index(p);
309         content_t c = vm->m_data[vi].getContent();
310         if (!CONTAINS(c_place_on, c))
311                 return 0;
312
313         Rotation rot = (rotation == ROTATE_RAND) ?
314                 (Rotation)pr->range(ROTATE_0, ROTATE_270) : rotation;
315
316         schematic->blitToVManip(p, vm, rot, false, mg->ndef);
317
318         return 1;
319 }
320
321
322 int DecoSchematic::getHeight()
323 {
324         return schematic->size.Y;
325 }