1 | /* -*- mode: C++; indent-tabs-mode: nil; -*- |
---|
2 | * |
---|
3 | * This file is a part of LEMON, a generic C++ optimization library. |
---|
4 | * |
---|
5 | * Copyright (C) 2003-2008 |
---|
6 | * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
---|
7 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
---|
8 | * |
---|
9 | * Permission to use, modify and distribute this software is granted |
---|
10 | * provided that this copyright notice appears in all copies. For |
---|
11 | * precise terms see the accompanying LICENSE file. |
---|
12 | * |
---|
13 | * This software is provided "AS IS" with no warranty of any kind, |
---|
14 | * express or implied, and with no claim as to its suitability for any |
---|
15 | * purpose. |
---|
16 | * |
---|
17 | */ |
---|
18 | |
---|
19 | #ifndef GRID_GRAPH_H |
---|
20 | #define GRID_GRAPH_H |
---|
21 | |
---|
22 | #include <lemon/core.h> |
---|
23 | #include <lemon/bits/graph_extender.h> |
---|
24 | #include <lemon/dim2.h> |
---|
25 | #include <lemon/assert.h> |
---|
26 | |
---|
27 | ///\ingroup graphs |
---|
28 | ///\file |
---|
29 | ///\brief GridGraph class. |
---|
30 | |
---|
31 | namespace lemon { |
---|
32 | |
---|
33 | class GridGraphBase { |
---|
34 | |
---|
35 | public: |
---|
36 | |
---|
37 | typedef GridGraphBase Graph; |
---|
38 | |
---|
39 | class Node; |
---|
40 | class Edge; |
---|
41 | class Arc; |
---|
42 | |
---|
43 | public: |
---|
44 | |
---|
45 | GridGraphBase() {} |
---|
46 | |
---|
47 | protected: |
---|
48 | |
---|
49 | void construct(int width, int height) { |
---|
50 | _width = width; _height = height; |
---|
51 | _node_num = width * height; |
---|
52 | _edge_num = 2 * _node_num - width - height; |
---|
53 | _edge_limit = _node_num - _width; |
---|
54 | } |
---|
55 | |
---|
56 | public: |
---|
57 | |
---|
58 | Node operator()(int i, int j) const { |
---|
59 | LEMON_DEBUG(0 <= i && i < _width && |
---|
60 | 0 <= j && j < _height, "Index out of range"); |
---|
61 | return Node(i + j * _width); |
---|
62 | } |
---|
63 | |
---|
64 | int col(Node n) const { |
---|
65 | return n._id % _width; |
---|
66 | } |
---|
67 | |
---|
68 | int row(Node n) const { |
---|
69 | return n._id / _width; |
---|
70 | } |
---|
71 | |
---|
72 | dim2::Point<int> pos(Node n) const { |
---|
73 | return dim2::Point<int>(col(n), row(n)); |
---|
74 | } |
---|
75 | |
---|
76 | int width() const { |
---|
77 | return _width; |
---|
78 | } |
---|
79 | |
---|
80 | int height() const { |
---|
81 | return _height; |
---|
82 | } |
---|
83 | |
---|
84 | typedef True NodeNumTag; |
---|
85 | typedef True ArcNumTag; |
---|
86 | |
---|
87 | int nodeNum() const { return _node_num; } |
---|
88 | int edgeNum() const { return _edge_num; } |
---|
89 | int arcNum() const { return 2 * _edge_num; } |
---|
90 | |
---|
91 | Node u(Edge edge) const { |
---|
92 | if (edge._id < _edge_limit) { |
---|
93 | return edge._id; |
---|
94 | } else { |
---|
95 | return (edge._id - _edge_limit) % (_width - 1) + |
---|
96 | (edge._id - _edge_limit) / (_width - 1) * _width; |
---|
97 | } |
---|
98 | } |
---|
99 | |
---|
100 | Node v(Edge edge) const { |
---|
101 | if (edge._id < _edge_limit) { |
---|
102 | return edge._id + _width; |
---|
103 | } else { |
---|
104 | return (edge._id - _edge_limit) % (_width - 1) + |
---|
105 | (edge._id - _edge_limit) / (_width - 1) * _width + 1; |
---|
106 | } |
---|
107 | } |
---|
108 | |
---|
109 | Node source(Arc arc) const { |
---|
110 | return (arc._id & 1) == 1 ? u(arc) : v(arc); |
---|
111 | } |
---|
112 | |
---|
113 | Node target(Arc arc) const { |
---|
114 | return (arc._id & 1) == 1 ? v(arc) : u(arc); |
---|
115 | } |
---|
116 | |
---|
117 | static int id(Node node) { return node._id; } |
---|
118 | static int id(Edge edge) { return edge._id; } |
---|
119 | static int id(Arc arc) { return arc._id; } |
---|
120 | |
---|
121 | int maxNodeId() const { return _node_num - 1; } |
---|
122 | int maxEdgeId() const { return _edge_num - 1; } |
---|
123 | int maxArcId() const { return 2 * _edge_num - 1; } |
---|
124 | |
---|
125 | static Node nodeFromId(int id) { return Node(id);} |
---|
126 | static Edge edgeFromId(int id) { return Edge(id);} |
---|
127 | static Arc arcFromId(int id) { return Arc(id);} |
---|
128 | |
---|
129 | typedef True FindEdgeTag; |
---|
130 | |
---|
131 | Edge findEdge(Node u, Node v, Edge prev = INVALID) const { |
---|
132 | if (prev != INVALID) return INVALID; |
---|
133 | if (v._id > u._id) { |
---|
134 | if (v._id - u._id == _width) |
---|
135 | return Edge(u._id); |
---|
136 | if (v._id - u._id == 1 && u._id % _width < _width - 1) { |
---|
137 | return Edge(u._id / _width * (_width - 1) + |
---|
138 | u._id % _width + _edge_limit); |
---|
139 | } |
---|
140 | } else { |
---|
141 | if (u._id - v._id == _width) |
---|
142 | return Edge(v._id); |
---|
143 | if (u._id - v._id == 1 && v._id % _width < _width - 1) { |
---|
144 | return Edge(v._id / _width * (_width - 1) + |
---|
145 | v._id % _width + _edge_limit); |
---|
146 | } |
---|
147 | } |
---|
148 | return INVALID; |
---|
149 | } |
---|
150 | |
---|
151 | Arc findArc(Node u, Node v, Arc prev = INVALID) const { |
---|
152 | if (prev != INVALID) return INVALID; |
---|
153 | if (v._id > u._id) { |
---|
154 | if (v._id - u._id == _width) |
---|
155 | return Arc((u._id << 1) | 1); |
---|
156 | if (v._id - u._id == 1 && u._id % _width < _width - 1) { |
---|
157 | return Arc(((u._id / _width * (_width - 1) + |
---|
158 | u._id % _width + _edge_limit) << 1) | 1); |
---|
159 | } |
---|
160 | } else { |
---|
161 | if (u._id - v._id == _width) |
---|
162 | return Arc(v._id << 1); |
---|
163 | if (u._id - v._id == 1 && v._id % _width < _width - 1) { |
---|
164 | return Arc((v._id / _width * (_width - 1) + |
---|
165 | v._id % _width + _edge_limit) << 1); |
---|
166 | } |
---|
167 | } |
---|
168 | return INVALID; |
---|
169 | } |
---|
170 | |
---|
171 | class Node { |
---|
172 | friend class GridGraphBase; |
---|
173 | |
---|
174 | protected: |
---|
175 | int _id; |
---|
176 | Node(int id) : _id(id) {} |
---|
177 | public: |
---|
178 | Node() {} |
---|
179 | Node (Invalid) : _id(-1) {} |
---|
180 | bool operator==(const Node node) const {return _id == node._id;} |
---|
181 | bool operator!=(const Node node) const {return _id != node._id;} |
---|
182 | bool operator<(const Node node) const {return _id < node._id;} |
---|
183 | }; |
---|
184 | |
---|
185 | class Edge { |
---|
186 | friend class GridGraphBase; |
---|
187 | |
---|
188 | protected: |
---|
189 | int _id; |
---|
190 | |
---|
191 | Edge(int id) : _id(id) {} |
---|
192 | |
---|
193 | public: |
---|
194 | Edge() {} |
---|
195 | Edge (Invalid) : _id(-1) {} |
---|
196 | bool operator==(const Edge edge) const {return _id == edge._id;} |
---|
197 | bool operator!=(const Edge edge) const {return _id != edge._id;} |
---|
198 | bool operator<(const Edge edge) const {return _id < edge._id;} |
---|
199 | }; |
---|
200 | |
---|
201 | class Arc { |
---|
202 | friend class GridGraphBase; |
---|
203 | |
---|
204 | protected: |
---|
205 | int _id; |
---|
206 | |
---|
207 | Arc(int id) : _id(id) {} |
---|
208 | |
---|
209 | public: |
---|
210 | Arc() {} |
---|
211 | Arc (Invalid) : _id(-1) {} |
---|
212 | operator Edge() const { return _id != -1 ? Edge(_id >> 1) : INVALID; } |
---|
213 | bool operator==(const Arc arc) const {return _id == arc._id;} |
---|
214 | bool operator!=(const Arc arc) const {return _id != arc._id;} |
---|
215 | bool operator<(const Arc arc) const {return _id < arc._id;} |
---|
216 | }; |
---|
217 | |
---|
218 | static bool direction(Arc arc) { |
---|
219 | return (arc._id & 1) == 1; |
---|
220 | } |
---|
221 | |
---|
222 | static Arc direct(Edge edge, bool dir) { |
---|
223 | return Arc((edge._id << 1) | (dir ? 1 : 0)); |
---|
224 | } |
---|
225 | |
---|
226 | void first(Node& node) const { |
---|
227 | node._id = _node_num - 1; |
---|
228 | } |
---|
229 | |
---|
230 | static void next(Node& node) { |
---|
231 | --node._id; |
---|
232 | } |
---|
233 | |
---|
234 | void first(Edge& edge) const { |
---|
235 | edge._id = _edge_num - 1; |
---|
236 | } |
---|
237 | |
---|
238 | static void next(Edge& edge) { |
---|
239 | --edge._id; |
---|
240 | } |
---|
241 | |
---|
242 | void first(Arc& arc) const { |
---|
243 | arc._id = 2 * _edge_num - 1; |
---|
244 | } |
---|
245 | |
---|
246 | static void next(Arc& arc) { |
---|
247 | --arc._id; |
---|
248 | } |
---|
249 | |
---|
250 | void firstOut(Arc& arc, const Node& node) const { |
---|
251 | if (node._id % _width < _width - 1) { |
---|
252 | arc._id = (_edge_limit + node._id % _width + |
---|
253 | (node._id / _width) * (_width - 1)) << 1 | 1; |
---|
254 | return; |
---|
255 | } |
---|
256 | if (node._id < _node_num - _width) { |
---|
257 | arc._id = node._id << 1 | 1; |
---|
258 | return; |
---|
259 | } |
---|
260 | if (node._id % _width > 0) { |
---|
261 | arc._id = (_edge_limit + node._id % _width + |
---|
262 | (node._id / _width) * (_width - 1) - 1) << 1; |
---|
263 | return; |
---|
264 | } |
---|
265 | if (node._id >= _width) { |
---|
266 | arc._id = (node._id - _width) << 1; |
---|
267 | return; |
---|
268 | } |
---|
269 | arc._id = -1; |
---|
270 | } |
---|
271 | |
---|
272 | void nextOut(Arc& arc) const { |
---|
273 | int nid = arc._id >> 1; |
---|
274 | if ((arc._id & 1) == 1) { |
---|
275 | if (nid >= _edge_limit) { |
---|
276 | nid = (nid - _edge_limit) % (_width - 1) + |
---|
277 | (nid - _edge_limit) / (_width - 1) * _width; |
---|
278 | if (nid < _node_num - _width) { |
---|
279 | arc._id = nid << 1 | 1; |
---|
280 | return; |
---|
281 | } |
---|
282 | } |
---|
283 | if (nid % _width > 0) { |
---|
284 | arc._id = (_edge_limit + nid % _width + |
---|
285 | (nid / _width) * (_width - 1) - 1) << 1; |
---|
286 | return; |
---|
287 | } |
---|
288 | if (nid >= _width) { |
---|
289 | arc._id = (nid - _width) << 1; |
---|
290 | return; |
---|
291 | } |
---|
292 | } else { |
---|
293 | if (nid >= _edge_limit) { |
---|
294 | nid = (nid - _edge_limit) % (_width - 1) + |
---|
295 | (nid - _edge_limit) / (_width - 1) * _width + 1; |
---|
296 | if (nid >= _width) { |
---|
297 | arc._id = (nid - _width) << 1; |
---|
298 | return; |
---|
299 | } |
---|
300 | } |
---|
301 | } |
---|
302 | arc._id = -1; |
---|
303 | } |
---|
304 | |
---|
305 | void firstIn(Arc& arc, const Node& node) const { |
---|
306 | if (node._id % _width < _width - 1) { |
---|
307 | arc._id = (_edge_limit + node._id % _width + |
---|
308 | (node._id / _width) * (_width - 1)) << 1; |
---|
309 | return; |
---|
310 | } |
---|
311 | if (node._id < _node_num - _width) { |
---|
312 | arc._id = node._id << 1; |
---|
313 | return; |
---|
314 | } |
---|
315 | if (node._id % _width > 0) { |
---|
316 | arc._id = (_edge_limit + node._id % _width + |
---|
317 | (node._id / _width) * (_width - 1) - 1) << 1 | 1; |
---|
318 | return; |
---|
319 | } |
---|
320 | if (node._id >= _width) { |
---|
321 | arc._id = (node._id - _width) << 1 | 1; |
---|
322 | return; |
---|
323 | } |
---|
324 | arc._id = -1; |
---|
325 | } |
---|
326 | |
---|
327 | void nextIn(Arc& arc) const { |
---|
328 | int nid = arc._id >> 1; |
---|
329 | if ((arc._id & 1) == 0) { |
---|
330 | if (nid >= _edge_limit) { |
---|
331 | nid = (nid - _edge_limit) % (_width - 1) + |
---|
332 | (nid - _edge_limit) / (_width - 1) * _width; |
---|
333 | if (nid < _node_num - _width) { |
---|
334 | arc._id = nid << 1; |
---|
335 | return; |
---|
336 | } |
---|
337 | } |
---|
338 | if (nid % _width > 0) { |
---|
339 | arc._id = (_edge_limit + nid % _width + |
---|
340 | (nid / _width) * (_width - 1) - 1) << 1 | 1; |
---|
341 | return; |
---|
342 | } |
---|
343 | if (nid >= _width) { |
---|
344 | arc._id = (nid - _width) << 1 | 1; |
---|
345 | return; |
---|
346 | } |
---|
347 | } else { |
---|
348 | if (nid >= _edge_limit) { |
---|
349 | nid = (nid - _edge_limit) % (_width - 1) + |
---|
350 | (nid - _edge_limit) / (_width - 1) * _width + 1; |
---|
351 | if (nid >= _width) { |
---|
352 | arc._id = (nid - _width) << 1 | 1; |
---|
353 | return; |
---|
354 | } |
---|
355 | } |
---|
356 | } |
---|
357 | arc._id = -1; |
---|
358 | } |
---|
359 | |
---|
360 | void firstInc(Edge& edge, bool& dir, const Node& node) const { |
---|
361 | if (node._id % _width < _width - 1) { |
---|
362 | edge._id = _edge_limit + node._id % _width + |
---|
363 | (node._id / _width) * (_width - 1); |
---|
364 | dir = true; |
---|
365 | return; |
---|
366 | } |
---|
367 | if (node._id < _node_num - _width) { |
---|
368 | edge._id = node._id; |
---|
369 | dir = true; |
---|
370 | return; |
---|
371 | } |
---|
372 | if (node._id % _width > 0) { |
---|
373 | edge._id = _edge_limit + node._id % _width + |
---|
374 | (node._id / _width) * (_width - 1) - 1; |
---|
375 | dir = false; |
---|
376 | return; |
---|
377 | } |
---|
378 | if (node._id >= _width) { |
---|
379 | edge._id = node._id - _width; |
---|
380 | dir = false; |
---|
381 | return; |
---|
382 | } |
---|
383 | edge._id = -1; |
---|
384 | dir = true; |
---|
385 | } |
---|
386 | |
---|
387 | void nextInc(Edge& edge, bool& dir) const { |
---|
388 | int nid = edge._id; |
---|
389 | if (dir) { |
---|
390 | if (nid >= _edge_limit) { |
---|
391 | nid = (nid - _edge_limit) % (_width - 1) + |
---|
392 | (nid - _edge_limit) / (_width - 1) * _width; |
---|
393 | if (nid < _node_num - _width) { |
---|
394 | edge._id = nid; |
---|
395 | return; |
---|
396 | } |
---|
397 | } |
---|
398 | if (nid % _width > 0) { |
---|
399 | edge._id = _edge_limit + nid % _width + |
---|
400 | (nid / _width) * (_width - 1) - 1; |
---|
401 | dir = false; |
---|
402 | return; |
---|
403 | } |
---|
404 | if (nid >= _width) { |
---|
405 | edge._id = nid - _width; |
---|
406 | dir = false; |
---|
407 | return; |
---|
408 | } |
---|
409 | } else { |
---|
410 | if (nid >= _edge_limit) { |
---|
411 | nid = (nid - _edge_limit) % (_width - 1) + |
---|
412 | (nid - _edge_limit) / (_width - 1) * _width + 1; |
---|
413 | if (nid >= _width) { |
---|
414 | edge._id = nid - _width; |
---|
415 | return; |
---|
416 | } |
---|
417 | } |
---|
418 | } |
---|
419 | edge._id = -1; |
---|
420 | dir = true; |
---|
421 | } |
---|
422 | |
---|
423 | Arc right(Node n) const { |
---|
424 | if (n._id % _width < _width - 1) { |
---|
425 | return Arc(((_edge_limit + n._id % _width + |
---|
426 | (n._id / _width) * (_width - 1)) << 1) | 1); |
---|
427 | } else { |
---|
428 | return INVALID; |
---|
429 | } |
---|
430 | } |
---|
431 | |
---|
432 | Arc left(Node n) const { |
---|
433 | if (n._id % _width > 0) { |
---|
434 | return Arc((_edge_limit + n._id % _width + |
---|
435 | (n._id / _width) * (_width - 1) - 1) << 1); |
---|
436 | } else { |
---|
437 | return INVALID; |
---|
438 | } |
---|
439 | } |
---|
440 | |
---|
441 | Arc up(Node n) const { |
---|
442 | if (n._id < _edge_limit) { |
---|
443 | return Arc((n._id << 1) | 1); |
---|
444 | } else { |
---|
445 | return INVALID; |
---|
446 | } |
---|
447 | } |
---|
448 | |
---|
449 | Arc down(Node n) const { |
---|
450 | if (n._id >= _width) { |
---|
451 | return Arc((n._id - _width) << 1); |
---|
452 | } else { |
---|
453 | return INVALID; |
---|
454 | } |
---|
455 | } |
---|
456 | |
---|
457 | private: |
---|
458 | int _width, _height; |
---|
459 | int _node_num, _edge_num; |
---|
460 | int _edge_limit; |
---|
461 | }; |
---|
462 | |
---|
463 | |
---|
464 | typedef GraphExtender<GridGraphBase> ExtendedGridGraphBase; |
---|
465 | |
---|
466 | /// \ingroup graphs |
---|
467 | /// |
---|
468 | /// \brief Grid graph class |
---|
469 | /// |
---|
470 | /// This class implements a special graph type. The nodes of the |
---|
471 | /// graph can be indexed by two integer \c (i,j) value where \c i is |
---|
472 | /// in the \c [0..width()-1] range and j is in the \c |
---|
473 | /// [0..height()-1] range. Two nodes are connected in the graph if |
---|
474 | /// the indexes differ exactly on one position and exactly one is |
---|
475 | /// the difference. The nodes of the graph be indexed by position |
---|
476 | /// with \c operator()() function. The positions of the nodes can be |
---|
477 | /// get with \c pos(), \c col() and \c row() members. The outgoing |
---|
478 | /// arcs can be retrieved with the \c right(), \c up(), \c left() |
---|
479 | /// and \c down() functions, where the bottom-left corner is the |
---|
480 | /// origin. |
---|
481 | /// |
---|
482 | /// \image html grid_graph.png |
---|
483 | /// \image latex grid_graph.eps "Grid digraph" row_num=\textrow_num |
---|
484 | /// |
---|
485 | /// A short example about the basic usage: |
---|
486 | ///\code |
---|
487 | /// GridGraph graph(rows, cols); |
---|
488 | /// GridGraph::NodeMap<int> val(graph); |
---|
489 | /// for (int i = 0; i < graph.width(); ++i) { |
---|
490 | /// for (int j = 0; j < graph.height(); ++j) { |
---|
491 | /// val[graph(i, j)] = i + j; |
---|
492 | /// } |
---|
493 | /// } |
---|
494 | ///\endcode |
---|
495 | /// |
---|
496 | /// The graph type is fully conform to the \ref concepts::Graph |
---|
497 | /// "Graph" concept, and it also has an important extra feature |
---|
498 | /// that its maps are real \ref concepts::ReferenceMap "reference |
---|
499 | /// map"s. |
---|
500 | class GridGraph : public ExtendedGridGraphBase { |
---|
501 | public: |
---|
502 | |
---|
503 | typedef ExtendedGridGraphBase Parent; |
---|
504 | |
---|
505 | /// \brief Map to get the indices of the nodes as dim2::Point<int>. |
---|
506 | /// |
---|
507 | /// Map to get the indices of the nodes as dim2::Point<int>. |
---|
508 | class IndexMap { |
---|
509 | public: |
---|
510 | /// \brief The key type of the map |
---|
511 | typedef GridGraph::Node Key; |
---|
512 | /// \brief The value type of the map |
---|
513 | typedef dim2::Point<int> Value; |
---|
514 | |
---|
515 | /// \brief Constructor |
---|
516 | /// |
---|
517 | /// Constructor |
---|
518 | IndexMap(const GridGraph& graph) : _graph(graph) {} |
---|
519 | |
---|
520 | /// \brief The subscript operator |
---|
521 | /// |
---|
522 | /// The subscript operator. |
---|
523 | Value operator[](Key key) const { |
---|
524 | return _graph.pos(key); |
---|
525 | } |
---|
526 | |
---|
527 | private: |
---|
528 | const GridGraph& _graph; |
---|
529 | }; |
---|
530 | |
---|
531 | /// \brief Map to get the column of the nodes. |
---|
532 | /// |
---|
533 | /// Map to get the column of the nodes. |
---|
534 | class ColMap { |
---|
535 | public: |
---|
536 | /// \brief The key type of the map |
---|
537 | typedef GridGraph::Node Key; |
---|
538 | /// \brief The value type of the map |
---|
539 | typedef int Value; |
---|
540 | |
---|
541 | /// \brief Constructor |
---|
542 | /// |
---|
543 | /// Constructor |
---|
544 | ColMap(const GridGraph& graph) : _graph(graph) {} |
---|
545 | |
---|
546 | /// \brief The subscript operator |
---|
547 | /// |
---|
548 | /// The subscript operator. |
---|
549 | Value operator[](Key key) const { |
---|
550 | return _graph.col(key); |
---|
551 | } |
---|
552 | |
---|
553 | private: |
---|
554 | const GridGraph& _graph; |
---|
555 | }; |
---|
556 | |
---|
557 | /// \brief Map to get the row of the nodes. |
---|
558 | /// |
---|
559 | /// Map to get the row of the nodes. |
---|
560 | class RowMap { |
---|
561 | public: |
---|
562 | /// \brief The key type of the map |
---|
563 | typedef GridGraph::Node Key; |
---|
564 | /// \brief The value type of the map |
---|
565 | typedef int Value; |
---|
566 | |
---|
567 | /// \brief Constructor |
---|
568 | /// |
---|
569 | /// Constructor |
---|
570 | RowMap(const GridGraph& graph) : _graph(graph) {} |
---|
571 | |
---|
572 | /// \brief The subscript operator |
---|
573 | /// |
---|
574 | /// The subscript operator. |
---|
575 | Value operator[](Key key) const { |
---|
576 | return _graph.row(key); |
---|
577 | } |
---|
578 | |
---|
579 | private: |
---|
580 | const GridGraph& _graph; |
---|
581 | }; |
---|
582 | |
---|
583 | /// \brief Constructor |
---|
584 | /// |
---|
585 | /// Construct a grid graph with given size. |
---|
586 | GridGraph(int width, int height) { construct(width, height); } |
---|
587 | |
---|
588 | /// \brief Resize the graph |
---|
589 | /// |
---|
590 | /// Resize the graph. The function will fully destroy and rebuild |
---|
591 | /// the graph. This cause that the maps of the graph will |
---|
592 | /// reallocated automatically and the previous values will be |
---|
593 | /// lost. |
---|
594 | void resize(int width, int height) { |
---|
595 | Parent::notifier(Arc()).clear(); |
---|
596 | Parent::notifier(Edge()).clear(); |
---|
597 | Parent::notifier(Node()).clear(); |
---|
598 | construct(width, height); |
---|
599 | Parent::notifier(Node()).build(); |
---|
600 | Parent::notifier(Edge()).build(); |
---|
601 | Parent::notifier(Arc()).build(); |
---|
602 | } |
---|
603 | |
---|
604 | /// \brief The node on the given position. |
---|
605 | /// |
---|
606 | /// Gives back the node on the given position. |
---|
607 | Node operator()(int i, int j) const { |
---|
608 | return Parent::operator()(i, j); |
---|
609 | } |
---|
610 | |
---|
611 | /// \brief Gives back the column index of the node. |
---|
612 | /// |
---|
613 | /// Gives back the column index of the node. |
---|
614 | int col(Node n) const { |
---|
615 | return Parent::col(n); |
---|
616 | } |
---|
617 | |
---|
618 | /// \brief Gives back the row index of the node. |
---|
619 | /// |
---|
620 | /// Gives back the row index of the node. |
---|
621 | int row(Node n) const { |
---|
622 | return Parent::row(n); |
---|
623 | } |
---|
624 | |
---|
625 | /// \brief Gives back the position of the node. |
---|
626 | /// |
---|
627 | /// Gives back the position of the node, ie. the <tt>(col,row)</tt> pair. |
---|
628 | dim2::Point<int> pos(Node n) const { |
---|
629 | return Parent::pos(n); |
---|
630 | } |
---|
631 | |
---|
632 | /// \brief Gives back the number of the columns. |
---|
633 | /// |
---|
634 | /// Gives back the number of the columns. |
---|
635 | int width() const { |
---|
636 | return Parent::width(); |
---|
637 | } |
---|
638 | |
---|
639 | /// \brief Gives back the number of the rows. |
---|
640 | /// |
---|
641 | /// Gives back the number of the rows. |
---|
642 | int height() const { |
---|
643 | return Parent::height(); |
---|
644 | } |
---|
645 | |
---|
646 | /// \brief Gives back the arc goes right from the node. |
---|
647 | /// |
---|
648 | /// Gives back the arc goes right from the node. If there is not |
---|
649 | /// outgoing arc then it gives back INVALID. |
---|
650 | Arc right(Node n) const { |
---|
651 | return Parent::right(n); |
---|
652 | } |
---|
653 | |
---|
654 | /// \brief Gives back the arc goes left from the node. |
---|
655 | /// |
---|
656 | /// Gives back the arc goes left from the node. If there is not |
---|
657 | /// outgoing arc then it gives back INVALID. |
---|
658 | Arc left(Node n) const { |
---|
659 | return Parent::left(n); |
---|
660 | } |
---|
661 | |
---|
662 | /// \brief Gives back the arc goes up from the node. |
---|
663 | /// |
---|
664 | /// Gives back the arc goes up from the node. If there is not |
---|
665 | /// outgoing arc then it gives back INVALID. |
---|
666 | Arc up(Node n) const { |
---|
667 | return Parent::up(n); |
---|
668 | } |
---|
669 | |
---|
670 | /// \brief Gives back the arc goes down from the node. |
---|
671 | /// |
---|
672 | /// Gives back the arc goes down from the node. If there is not |
---|
673 | /// outgoing arc then it gives back INVALID. |
---|
674 | Arc down(Node n) const { |
---|
675 | return Parent::down(n); |
---|
676 | } |
---|
677 | |
---|
678 | /// \brief Index map of the grid graph |
---|
679 | /// |
---|
680 | /// Just returns an IndexMap for the grid graph. |
---|
681 | IndexMap indexMap() const { |
---|
682 | return IndexMap(*this); |
---|
683 | } |
---|
684 | |
---|
685 | /// \brief Row map of the grid graph |
---|
686 | /// |
---|
687 | /// Just returns a RowMap for the grid graph. |
---|
688 | RowMap rowMap() const { |
---|
689 | return RowMap(*this); |
---|
690 | } |
---|
691 | |
---|
692 | /// \brief Column map of the grid graph |
---|
693 | /// |
---|
694 | /// Just returns a ColMap for the grid graph. |
---|
695 | ColMap colMap() const { |
---|
696 | return ColMap(*this); |
---|
697 | } |
---|
698 | |
---|
699 | }; |
---|
700 | |
---|
701 | } |
---|
702 | #endif |
---|