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_schematic[] = {
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
placeAllDecos(Mapgen * mg,u32 seed,v3s16 nmin,v3s16 nmax)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
Decoration()61 Decoration::Decoration()
62 {
63 mapseed = 0;
64 np = NULL;
65 fill_ratio = 0;
66 sidelen = 1;
67 }
68
69
~Decoration()70 Decoration::~Decoration()
71 {
72 delete np;
73 }
74
75
placeDeco(Mapgen * mg,u32 blockseed,v3s16 nmin,v3s16 nmax)76 size_t Decoration::placeDeco(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax)
77 {
78 PseudoRandom ps(blockseed + 53);
79 int carea_size = nmax.X - nmin.X + 1;
80
81 // Divide area into parts
82 if (carea_size % sidelen) {
83 errorstream << "Decoration::placeDeco: chunk size is not divisible by "
84 "sidelen; setting sidelen to " << carea_size << std::endl;
85 sidelen = carea_size;
86 }
87
88 s16 divlen = carea_size / sidelen;
89 int area = sidelen * sidelen;
90
91 for (s16 z0 = 0; z0 < divlen; z0++)
92 for (s16 x0 = 0; x0 < divlen; x0++) {
93 v2s16 p2d_center( // Center position of part of division
94 nmin.X + sidelen / 2 + sidelen * x0,
95 nmin.Z + sidelen / 2 + sidelen * z0
96 );
97 v2s16 p2d_min( // Minimum edge of part of division
98 nmin.X + sidelen * x0,
99 nmin.Z + sidelen * z0
100 );
101 v2s16 p2d_max( // Maximum edge of part of division
102 nmin.X + sidelen + sidelen * x0 - 1,
103 nmin.Z + sidelen + sidelen * z0 - 1
104 );
105
106 // Amount of decorations
107 float nval = np ?
108 NoisePerlin2D(np, p2d_center.X, p2d_center.Y, mapseed) :
109 fill_ratio;
110 u32 deco_count = area * MYMAX(nval, 0.f);
111
112 for (u32 i = 0; i < deco_count; i++) {
113 s16 x = ps.range(p2d_min.X, p2d_max.X);
114 s16 z = ps.range(p2d_min.Y, p2d_max.Y);
115
116 int mapindex = carea_size * (z - nmin.Z) + (x - nmin.X);
117
118 s16 y = mg->heightmap ?
119 mg->heightmap[mapindex] :
120 mg->findGroundLevel(v2s16(x, z), nmin.Y, nmax.Y);
121
122 if (y < nmin.Y || y > nmax.Y)
123 continue;
124
125 int height = getHeight();
126 int max_y = nmax.Y;// + MAP_BLOCKSIZE - 1;
127 if (y + 1 + height > max_y) {
128 continue;
129 #if 0
130 printf("Decoration at (%d %d %d) cut off\n", x, y, z);
131 //add to queue
132 JMutexAutoLock cutofflock(cutoff_mutex);
133 cutoffs.push_back(CutoffData(x, y, z, height));
134 #endif
135 }
136
137 if (mg->biomemap) {
138 std::set<u8>::iterator iter;
139
140 if (biomes.size()) {
141 iter = biomes.find(mg->biomemap[mapindex]);
142 if (iter == biomes.end())
143 continue;
144 }
145 }
146
147 generate(mg, &ps, max_y, v3s16(x, y, z));
148 }
149 }
150
151 return 0;
152 }
153
154
155 #if 0
156 void Decoration::placeCutoffs(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax)
157 {
158 PseudoRandom pr(blockseed + 53);
159 std::vector<CutoffData> handled_cutoffs;
160
161 // Copy over the cutoffs we're interested in so we don't needlessly hold a lock
162 {
163 JMutexAutoLock cutofflock(cutoff_mutex);
164 for (std::list<CutoffData>::iterator i = cutoffs.begin();
165 i != cutoffs.end(); ++i) {
166 CutoffData cutoff = *i;
167 v3s16 p = cutoff.p;
168 s16 height = cutoff.height;
169 if (p.X < nmin.X || p.X > nmax.X ||
170 p.Z < nmin.Z || p.Z > nmax.Z)
171 continue;
172 if (p.Y + height < nmin.Y || p.Y > nmax.Y)
173 continue;
174
175 handled_cutoffs.push_back(cutoff);
176 }
177 }
178
179 // Generate the cutoffs
180 for (size_t i = 0; i != handled_cutoffs.size(); i++) {
181 v3s16 p = handled_cutoffs[i].p;
182 s16 height = handled_cutoffs[i].height;
183
184 if (p.Y + height > nmax.Y) {
185 //printf("Decoration at (%d %d %d) cut off again!\n", p.X, p.Y, p.Z);
186 cuttoffs.push_back(v3s16(p.X, p.Y, p.Z));
187 }
188
189 generate(mg, &pr, nmax.Y, nmin.Y - p.Y, v3s16(p.X, nmin.Y, p.Z));
190 }
191
192 // Remove cutoffs that were handled from the cutoff list
193 {
194 JMutexAutoLock cutofflock(cutoff_mutex);
195 for (std::list<CutoffData>::iterator i = cutoffs.begin();
196 i != cutoffs.end(); ++i) {
197
198 for (size_t j = 0; j != handled_cutoffs.size(); j++) {
199 CutoffData coff = *i;
200 if (coff.p == handled_cutoffs[j].p)
201 i = cutoffs.erase(i);
202 }
203 }
204 }
205 }
206 #endif
207
208
209 ///////////////////////////////////////////////////////////////////////////////
210
211
canPlaceDecoration(ManualMapVoxelManipulator * vm,v3s16 p)212 bool DecoSimple::canPlaceDecoration(ManualMapVoxelManipulator *vm, v3s16 p)
213 {
214 // Don't bother if there aren't any decorations to place
215 if (c_decos.size() == 0)
216 return false;
217
218 u32 vi = vm->m_area.index(p);
219
220 // Check if the decoration can be placed on this node
221 if (!CONTAINS(c_place_on, vm->m_data[vi].getContent()))
222 return false;
223
224 // Don't continue if there are no spawnby constraints
225 if (nspawnby == -1)
226 return true;
227
228 int nneighs = 0;
229 v3s16 dirs[8] = {
230 v3s16( 0, 0, 1),
231 v3s16( 0, 0, -1),
232 v3s16( 1, 0, 0),
233 v3s16(-1, 0, 0),
234 v3s16( 1, 0, 1),
235 v3s16(-1, 0, 1),
236 v3s16(-1, 0, -1),
237 v3s16( 1, 0, -1)
238 };
239
240 // Check a Moore neighborhood if there are enough spawnby nodes
241 for (size_t i = 0; i != ARRLEN(dirs); i++) {
242 u32 index = vm->m_area.index(p + dirs[i]);
243 if (!vm->m_area.contains(index))
244 continue;
245
246 if (CONTAINS(c_spawnby, vm->m_data[index].getContent()))
247 nneighs++;
248 }
249
250 if (nneighs < nspawnby)
251 return false;
252
253 return true;
254 }
255
256
generate(Mapgen * mg,PseudoRandom * pr,s16 max_y,v3s16 p)257 void DecoSimple::generate(Mapgen *mg, PseudoRandom *pr, s16 max_y, v3s16 p)
258 {
259 ManualMapVoxelManipulator *vm = mg->vm;
260
261 if (!canPlaceDecoration(vm, p))
262 return;
263
264 content_t c_place = c_decos[pr->range(0, c_decos.size() - 1)];
265
266 s16 height = (deco_height_max > 0) ?
267 pr->range(deco_height, deco_height_max) : deco_height;
268
269 height = MYMIN(height, max_y - p.Y);
270
271 v3s16 em = vm->m_area.getExtent();
272 u32 vi = vm->m_area.index(p);
273 for (int i = 0; i < height; i++) {
274 vm->m_area.add_y(em, vi, 1);
275
276 content_t c = vm->m_data[vi].getContent();
277 if (c != CONTENT_AIR && c != CONTENT_IGNORE)
278 break;
279
280 vm->m_data[vi] = MapNode(c_place);
281 }
282 }
283
284
getHeight()285 int DecoSimple::getHeight()
286 {
287 return (deco_height_max > 0) ? deco_height_max : deco_height;
288 }
289
290
291 ///////////////////////////////////////////////////////////////////////////////
292
293
generate(Mapgen * mg,PseudoRandom * pr,s16 max_y,v3s16 p)294 void DecoSchematic::generate(Mapgen *mg, PseudoRandom *pr, s16 max_y, v3s16 p)
295 {
296 ManualMapVoxelManipulator *vm = mg->vm;
297
298 if (flags & DECO_PLACE_CENTER_X)
299 p.X -= (schematic->size.X + 1) / 2;
300 if (flags & DECO_PLACE_CENTER_Y)
301 p.Y -= (schematic->size.Y + 1) / 2;
302 if (flags & DECO_PLACE_CENTER_Z)
303 p.Z -= (schematic->size.Z + 1) / 2;
304
305 u32 vi = vm->m_area.index(p);
306 content_t c = vm->m_data[vi].getContent();
307 if (!CONTAINS(c_place_on, c))
308 return;
309
310 Rotation rot = (rotation == ROTATE_RAND) ?
311 (Rotation)pr->range(ROTATE_0, ROTATE_270) : rotation;
312
313 schematic->blitToVManip(p, vm, rot, false, mg->ndef);
314 }
315
316
getHeight()317 int DecoSchematic::getHeight()
318 {
319 return schematic->size.Y;
320 }
321