PolyConnectivity.hh 33.1 KB
Newer Older
Jan Möbius's avatar
Jan Möbius committed
1
2
3
/*===========================================================================*\
 *                                                                           *
 *                               OpenMesh                                    *
4
 *      Copyright (C) 2001-2014 by Computer Graphics Group, RWTH Aachen      *
Jan Möbius's avatar
Jan Möbius committed
5
6
 *                           www.openmesh.org                                *
 *                                                                           *
7
8
 *---------------------------------------------------------------------------* 
 *  This file is part of OpenMesh.                                           *
Jan Möbius's avatar
Jan Möbius committed
9
 *                                                                           *
10
11
12
13
14
 *  OpenMesh is free software: you can redistribute it and/or modify         * 
 *  it under the terms of the GNU Lesser General Public License as           *
 *  published by the Free Software Foundation, either version 3 of           *
 *  the License, or (at your option) any later version with the              *
 *  following exceptions:                                                    *
Jan Möbius's avatar
Jan Möbius committed
15
 *                                                                           *
16
17
18
19
20
21
22
 *  If other files instantiate templates or use macros                       *
 *  or inline functions from this file, or you compile this file and         *
 *  link it with other files to produce an executable, this file does        *
 *  not by itself cause the resulting executable to be covered by the        *
 *  GNU Lesser General Public License. This exception does not however       *
 *  invalidate any other reasons why the executable file might be            *
 *  covered by the GNU Lesser General Public License.                        *
Jan Möbius's avatar
Jan Möbius committed
23
 *                                                                           *
24
25
26
27
 *  OpenMesh is distributed in the hope that it will be useful,              *
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of           *
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the            *
 *  GNU Lesser General Public License for more details.                      *
Jan Möbius's avatar
Jan Möbius committed
28
 *                                                                           *
29
30
31
32
33
34
35
36
37
38
 *  You should have received a copy of the GNU LesserGeneral Public          *
 *  License along with OpenMesh.  If not,                                    *
 *  see <http://www.gnu.org/licenses/>.                                      *
 *                                                                           *
\*===========================================================================*/ 

/*===========================================================================*\
 *                                                                           *             
 *   $Revision$                                                         *
 *   $Date$                   *
Jan Möbius's avatar
Jan Möbius committed
39
40
41
42
43
44
45
46
47
48
49
50
51
 *                                                                           *
\*===========================================================================*/

#ifndef OPENMESH_POLYCONNECTIVITY_HH
#define OPENMESH_POLYCONNECTIVITY_HH

#include <OpenMesh/Core/Mesh/ArrayKernel.hh>
#include <OpenMesh/Core/Mesh/IteratorsT.hh>
#include <OpenMesh/Core/Mesh/CirculatorsT.hh>

namespace OpenMesh
{

Jan Möbius's avatar
Jan Möbius committed
52
/** \brief Connectivity Class for polygonal meshes
53
*/
54
class OPENMESHDLLEXPORT PolyConnectivity : public ArrayKernel
Jan Möbius's avatar
Jan Möbius committed
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
{
public:
  /// \name Mesh Handles
  //@{
  /// Invalid handle
  static const VertexHandle                           InvalidVertexHandle;
  /// Invalid handle
  static const HalfedgeHandle                         InvalidHalfedgeHandle;
  /// Invalid handle
  static const EdgeHandle                             InvalidEdgeHandle;
  /// Invalid handle
  static const FaceHandle                             InvalidFaceHandle;
  //@}

  typedef PolyConnectivity                            This;

  //--- iterators ---

  /** \name Mesh Iterators
      Refer to OpenMesh::Mesh::Iterators or \ref mesh_iterators for
      documentation.
  */
  //@{
  /// Linear iterator
79
80
81
82
  typedef Iterators::GenericIteratorT<This, This::VertexHandle, ArrayKernel, &This::has_vertex_status, &This::n_vertices> VertexIter;
  typedef Iterators::GenericIteratorT<This, This::HalfedgeHandle, ArrayKernel, &This::has_halfedge_status, &This::n_halfedges> HalfedgeIter;
  typedef Iterators::GenericIteratorT<This, This::EdgeHandle, ArrayKernel, &This::has_edge_status, &This::n_edges> EdgeIter;
  typedef Iterators::GenericIteratorT<This, This::FaceHandle, ArrayKernel, &This::has_face_status, &This::n_faces> FaceIter;
Jan Möbius's avatar
Jan Möbius committed
83

84
85
86
87
  typedef VertexIter ConstVertexIter;
  typedef HalfedgeIter ConstHalfedgeIter;
  typedef EdgeIter ConstEdgeIter;
  typedef FaceIter ConstFaceIter;
Jan Möbius's avatar
Jan Möbius committed
88
89
90
91
92
93
94
95
96
  //@}

  //--- circulators ---

  /** \name Mesh Circulators
      Refer to OpenMesh::Mesh::Iterators or \ref mesh_iterators
      for documentation.
  */
  //@{
97
98
99
100

  /*
   * Vertex-centered circulators
   */
101
  typedef Iterators::GenericCirculatorT<This,  This::VertexHandle,  This::VertexHandle,
102
103
104
          &Iterators::GenericCirculatorBaseT<This>::toVertexHandle>
  VertexVertexIter;

105
  typedef Iterators::GenericCirculatorT<This,  This::VertexHandle,  This::HalfedgeHandle,
106
107
108
          &Iterators::GenericCirculatorBaseT<This>::toHalfedgeHandle>
  VertexOHalfedgeIter;

109
  typedef Iterators::GenericCirculatorT<This,  This::VertexHandle,  This::HalfedgeHandle,
110
111
112
          &Iterators::GenericCirculatorBaseT<This>::toOppositeHalfedgeHandle>
  VertexIHalfedgeIter;

113
  typedef Iterators::GenericCirculatorT<This,  This::VertexHandle,  This::FaceHandle,
114
115
116
          &Iterators::GenericCirculatorBaseT<This>::toFaceHandle>
  VertexFaceIter;

117
  typedef Iterators::GenericCirculatorT<This,  This::VertexHandle,  This::EdgeHandle,
118
119
120
          &Iterators::GenericCirculatorBaseT<This>::toEdgeHandle>
  VertexEdgeIter;

121
122
123
124
  typedef Iterators::GenericCirculatorT<This, This::FaceHandle, This::HalfedgeHandle,
      &Iterators::GenericCirculatorBaseT<This>::toHalfedgeHandle>
  HalfedgeLoopIter;

125
126
127
128
129
130
  typedef VertexVertexIter    ConstVertexVertexIter;
  typedef VertexOHalfedgeIter ConstVertexOHalfedgeIter;
  typedef VertexIHalfedgeIter ConstVertexIHalfedgeIter;
  typedef VertexFaceIter      ConstVertexFaceIter;
  typedef VertexEdgeIter      ConstVertexEdgeIter;

131
132
133
  /*
   * Face-centered circulators
   */
134
  typedef Iterators::GenericCirculatorT<This,  This::FaceHandle,  This::VertexHandle,
135
136
137
          &Iterators::GenericCirculatorBaseT<This>::toVertexHandle>
  FaceVertexIter;

138
  typedef Iterators::GenericCirculatorT<This,  This::FaceHandle,  This::HalfedgeHandle,
139
140
141
          &Iterators::GenericCirculatorBaseT<This>::toHalfedgeHandle>
  FaceHalfedgeIter;

142
  typedef Iterators::GenericCirculatorT<This,  This::FaceHandle,  This::EdgeHandle,
143
144
145
          &Iterators::GenericCirculatorBaseT<This>::toEdgeHandle>
  FaceEdgeIter;

146
  typedef Iterators::GenericCirculatorT<This,  This::FaceHandle,  This::FaceHandle,
147
148
          &Iterators::GenericCirculatorBaseT<This>::toOppositeFaceHandle>
  FaceFaceIter;
Jan Möbius's avatar
Jan Möbius committed
149

150
151
152
153
  typedef FaceVertexIter      ConstFaceVertexIter;
  typedef FaceHalfedgeIter    ConstFaceHalfedgeIter;
  typedef FaceEdgeIter        ConstFaceEdgeIter;
  typedef FaceFaceIter        ConstFaceFaceIter;
154
155
156
157
158
159

  /*
   * Halfedge circulator
   */
  typedef HalfedgeLoopIter   ConstHalfedgeLoopIter;

Jan Möbius's avatar
Jan Möbius committed
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
  //@}

  // --- shortcuts

  /** \name Typedef Shortcuts
      Provided for convenience only
  */
  //@{
  /// Alias typedef
  typedef VertexHandle    VHandle;
  typedef HalfedgeHandle  HHandle;
  typedef EdgeHandle      EHandle;
  typedef FaceHandle      FHandle;

  typedef VertexIter    VIter;
  typedef HalfedgeIter  HIter;
  typedef EdgeIter      EIter;
  typedef FaceIter      FIter;

  typedef ConstVertexIter    CVIter;
  typedef ConstHalfedgeIter  CHIter;
  typedef ConstEdgeIter      CEIter;
  typedef ConstFaceIter      CFIter;

  typedef VertexVertexIter      VVIter;
  typedef VertexOHalfedgeIter   VOHIter;
  typedef VertexIHalfedgeIter   VIHIter;
  typedef VertexEdgeIter        VEIter;
  typedef VertexFaceIter        VFIter;
  typedef FaceVertexIter        FVIter;
  typedef FaceHalfedgeIter      FHIter;
  typedef FaceEdgeIter          FEIter;
  typedef FaceFaceIter          FFIter;

  typedef ConstVertexVertexIter      CVVIter;
  typedef ConstVertexOHalfedgeIter   CVOHIter;
  typedef ConstVertexIHalfedgeIter   CVIHIter;
  typedef ConstVertexEdgeIter        CVEIter;
  typedef ConstVertexFaceIter        CVFIter;
  typedef ConstFaceVertexIter        CFVIter;
  typedef ConstFaceHalfedgeIter      CFHIter;
  typedef ConstFaceEdgeIter          CFEIter;
  typedef ConstFaceFaceIter          CFFIter;
  //@}

public:

  PolyConnectivity()  {}
  virtual ~PolyConnectivity() {}

  inline static bool is_triangles()
  { return false; }

  /** assign_connectivity() method. See ArrayKernel::assign_connectivity()
      for more details. */
  inline void assign_connectivity(const PolyConnectivity& _other)
  { ArrayKernel::assign_connectivity(_other); }
  
  /** \name Adding items to a mesh
  */
  //@{
221

Jan Möbius's avatar
Jan Möbius committed
222
223
224
225
  /// Add a new vertex 
  inline VertexHandle add_vertex()
  { return new_vertex(); }

226
227
228
229
230
231
232
  /** \brief Add and connect a new face
  *
  * Create a new face consisting of the vertices provided by the vertex handle vector.
  * (The vertices have to be already added to the mesh by add_vertex)
  *
  * @param _vhandles sorted list of vertex handles (also defines order in which the vertices are added to the face)
  */
233
  FaceHandle add_face(const std::vector<VertexHandle>& _vhandles);
234
235
236
237
238
239
240
 
   
  /** \brief Add and connect a new face
  *
  * Create a new face consisting of three vertices provided by the handles.
  * (The vertices have to be already added to the mesh by add_vertex)
  *
Jan Möbius's avatar
Jan Möbius committed
241
242
243
  * @param _vh0 First  vertex handle
  * @param _vh1 Second vertex handle
  * @param _vh2 Third  vertex handle
244
  */
245
  FaceHandle add_face(VertexHandle _vh0, VertexHandle _vh1, VertexHandle _vh2);
246
247
248
249
250
251

  /** \brief Add and connect a new face
  *
  * Create a new face consisting of four vertices provided by the handles.
  * (The vertices have to be already added to the mesh by add_vertex)
  *
Jan Möbius's avatar
Jan Möbius committed
252
253
254
255
  * @param _vh0 First  vertex handle
  * @param _vh1 Second vertex handle
  * @param _vh2 Third  vertex handle
  * @param _vh3 Fourth vertex handle
256
  */
257
  FaceHandle add_face(VertexHandle _vh0, VertexHandle _vh1, VertexHandle _vh2, VertexHandle _vh3);
258
259
260
261
262
263
264
265
266
 
  /** \brief Add and connect a new face
  *
  * Create a new face consisting of vertices provided by a handle array.
  * (The vertices have to be already added to the mesh by add_vertex)
  *
  * @param _vhandles pointer to a sorted list of vertex handles (also defines order in which the vertices are added to the face)
  * @param _vhs_size number of vertex handles in the array
  */
Jan Möbius's avatar
Jan Möbius committed
267
  FaceHandle add_face(const VertexHandle* _vhandles, size_t _vhs_size);
268

Jan Möbius's avatar
Jan Möbius committed
269
270
271
272
273
  //@}

  /// \name Deleting mesh items and other connectivity/topology modifications
  //@{

274
275
276
277
278
279
280
  /** Returns whether collapsing halfedge _heh is ok or would lead to
      topological inconsistencies.
      \attention This method need the Attributes::Status attribute and
      changes the \em tagged bit.  */
  bool is_collapse_ok(HalfedgeHandle _he);
    
    
Jan Möbius's avatar
Jan Möbius committed
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
  /** Mark vertex and all incident edges and faces deleted.
      Items marked deleted will be removed by garbageCollection().
      \attention Needs the Attributes::Status attribute for vertices,
      edges and faces.
  */
  void delete_vertex(VertexHandle _vh, bool _delete_isolated_vertices = true);

  /** Mark edge (two opposite halfedges) and incident faces deleted.
      Resulting isolated vertices are marked deleted if
      _delete_isolated_vertices is true. Items marked deleted will be
      removed by garbageCollection().

      \attention Needs the Attributes::Status attribute for vertices,
      edges and faces.
  */
  void delete_edge(EdgeHandle _eh, bool _delete_isolated_vertices=true);

  /** Delete face _fh and resulting degenerated empty halfedges as
299
      well.  Resulting isolated vertices will be deleted if
Jan Möbius's avatar
Jan Möbius committed
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
      _delete_isolated_vertices is true.

      \attention All item will only be marked to be deleted. They will
      actually be removed by calling garbage_collection().

      \attention Needs the Attributes::Status attribute for vertices,
      edges and faces.
  */
  void delete_face(FaceHandle _fh, bool _delete_isolated_vertices=true);

  //@}
  
  /** \name Begin and end iterators
  */
  //@{

  /// Begin iterator for vertices
317
  VertexIter vertices_begin();
Jan Möbius's avatar
Jan Möbius committed
318
  /// Const begin iterator for vertices
319
  ConstVertexIter vertices_begin() const;
Jan Möbius's avatar
Jan Möbius committed
320
  /// End iterator for vertices
321
  VertexIter vertices_end();
Jan Möbius's avatar
Jan Möbius committed
322
  /// Const end iterator for vertices
323
  ConstVertexIter vertices_end() const;
Jan Möbius's avatar
Jan Möbius committed
324
325

  /// Begin iterator for halfedges
326
  HalfedgeIter halfedges_begin();
Jan Möbius's avatar
Jan Möbius committed
327
  /// Const begin iterator for halfedges
328
  ConstHalfedgeIter halfedges_begin() const;
Jan Möbius's avatar
Jan Möbius committed
329
  /// End iterator for halfedges
330
  HalfedgeIter halfedges_end();
Jan Möbius's avatar
Jan Möbius committed
331
  /// Const end iterator for halfedges
332
  ConstHalfedgeIter halfedges_end() const;
Jan Möbius's avatar
Jan Möbius committed
333
334

  /// Begin iterator for edges
335
  EdgeIter edges_begin();
Jan Möbius's avatar
Jan Möbius committed
336
  /// Const begin iterator for edges
337
  ConstEdgeIter edges_begin() const;
Jan Möbius's avatar
Jan Möbius committed
338
  /// End iterator for edges
339
  EdgeIter edges_end();
Jan Möbius's avatar
Jan Möbius committed
340
  /// Const end iterator for edges
341
  ConstEdgeIter edges_end() const;
Jan Möbius's avatar
Jan Möbius committed
342
343

  /// Begin iterator for faces
344
  FaceIter faces_begin();
Jan Möbius's avatar
Jan Möbius committed
345
  /// Const begin iterator for faces
346
  ConstFaceIter faces_begin() const;
Jan Möbius's avatar
Jan Möbius committed
347
  /// End iterator for faces
348
  FaceIter faces_end();
Jan Möbius's avatar
Jan Möbius committed
349
  /// Const end iterator for faces
350
  ConstFaceIter faces_end() const;
Jan Möbius's avatar
Jan Möbius committed
351

352
  template<typename CONTAINER_TYPE, typename ITER_TYPE, ITER_TYPE (CONTAINER_TYPE::*begin_fn)() const, ITER_TYPE (CONTAINER_TYPE::*end_fn)() const>
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
  class EntityRange {
      public:
          EntityRange(CONTAINER_TYPE &container) : container_(container) {}
          ITER_TYPE begin() { return (container_.*begin_fn)(); }
          ITER_TYPE end() { return (container_.*end_fn)(); }

      private:
          CONTAINER_TYPE &container_;
  };
  typedef EntityRange<const PolyConnectivity, PolyConnectivity::ConstVertexIter, &PolyConnectivity::vertices_begin, &PolyConnectivity::vertices_end> ConstVertexRange;
  typedef EntityRange<const PolyConnectivity, PolyConnectivity::ConstHalfedgeIter, &PolyConnectivity::halfedges_begin, &PolyConnectivity::halfedges_end> ConstHalfedgeRange;
  typedef EntityRange<const PolyConnectivity, PolyConnectivity::ConstEdgeIter, &PolyConnectivity::edges_begin, &PolyConnectivity::edges_end> ConstEdgeRange;
  typedef EntityRange<const PolyConnectivity, PolyConnectivity::ConstFaceIter, &PolyConnectivity::faces_begin, &PolyConnectivity::faces_end> ConstFaceRange;

  /**
   * @return The vertices as a range object suitable for C++11 range based for loops.
   */
  ConstVertexRange vertices() const { return ConstVertexRange(*this); }

  /**
373
   * @return The halfedges as a range object suitable for C++11 range based for loops.
374
375
376
377
   */
  ConstHalfedgeRange halfedges() const { return ConstHalfedgeRange(*this); }

  /**
378
   * @return The edges as a range object suitable for C++11 range based for loops.
379
380
381
382
   */
  ConstEdgeRange edges() const { return ConstEdgeRange(*this); }

  /**
383
   * @return The faces as a range object suitable for C++11 range based for loops.
384
385
   */
  ConstFaceRange faces() const { return ConstFaceRange(*this); }
Jan Möbius's avatar
Jan Möbius committed
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
  //@}



  /** \name Begin for skipping iterators
  */
  //@{

  /// Begin iterator for vertices
  VertexIter vertices_sbegin()
  { return VertexIter(*this, VertexHandle(0), true); }
  /// Const begin iterator for vertices
  ConstVertexIter vertices_sbegin() const
  { return ConstVertexIter(*this, VertexHandle(0), true); }

  /// Begin iterator for halfedges
  HalfedgeIter halfedges_sbegin()
  { return HalfedgeIter(*this, HalfedgeHandle(0), true); }
  /// Const begin iterator for halfedges
  ConstHalfedgeIter halfedges_sbegin() const
  { return ConstHalfedgeIter(*this, HalfedgeHandle(0), true); }

  /// Begin iterator for edges
  EdgeIter edges_sbegin()
  { return EdgeIter(*this, EdgeHandle(0), true); }
  /// Const begin iterator for edges
  ConstEdgeIter edges_sbegin() const
  { return ConstEdgeIter(*this, EdgeHandle(0), true); }

  /// Begin iterator for faces
  FaceIter faces_sbegin()
  { return FaceIter(*this, FaceHandle(0), true); }
  /// Const begin iterator for faces
  ConstFaceIter faces_sbegin() const
  { return ConstFaceIter(*this, FaceHandle(0), true); }

  //@}

  //--- circulators ---

  /** \name Vertex and Face circulators
  */
  //@{

  /// vertex - vertex circulator
431
432
  VertexVertexIter vv_iter(VertexHandle _vh)
  { return VertexVertexIter(*this, _vh); }
Jan Möbius's avatar
Jan Möbius committed
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
  /// vertex - incoming halfedge circulator
  VertexIHalfedgeIter vih_iter(VertexHandle _vh)
  { return VertexIHalfedgeIter(*this, _vh); }
  /// vertex - outgoing halfedge circulator
  VertexOHalfedgeIter voh_iter(VertexHandle _vh)
  { return VertexOHalfedgeIter(*this, _vh); }
  /// vertex - edge circulator
  VertexEdgeIter ve_iter(VertexHandle _vh)
  { return VertexEdgeIter(*this, _vh); }
  /// vertex - face circulator
  VertexFaceIter vf_iter(VertexHandle _vh)
  { return VertexFaceIter(*this, _vh); }

  /// const vertex circulator
  ConstVertexVertexIter cvv_iter(VertexHandle _vh) const
  { return ConstVertexVertexIter(*this, _vh); }
  /// const vertex - incoming halfedge circulator
  ConstVertexIHalfedgeIter cvih_iter(VertexHandle _vh) const
  { return ConstVertexIHalfedgeIter(*this, _vh); }
  /// const vertex - outgoing halfedge circulator
  ConstVertexOHalfedgeIter cvoh_iter(VertexHandle _vh) const
  { return ConstVertexOHalfedgeIter(*this, _vh); }
  /// const vertex - edge circulator
  ConstVertexEdgeIter cve_iter(VertexHandle _vh) const
  { return ConstVertexEdgeIter(*this, _vh); }
  /// const vertex - face circulator
  ConstVertexFaceIter cvf_iter(VertexHandle _vh) const
  { return ConstVertexFaceIter(*this, _vh); }

  /// face - vertex circulator
  FaceVertexIter fv_iter(FaceHandle _fh)
  { return FaceVertexIter(*this, _fh); }
  /// face - halfedge circulator
  FaceHalfedgeIter fh_iter(FaceHandle _fh)
  { return FaceHalfedgeIter(*this, _fh); }
  /// face - edge circulator
  FaceEdgeIter fe_iter(FaceHandle _fh)
  { return FaceEdgeIter(*this, _fh); }
  /// face - face circulator
  FaceFaceIter ff_iter(FaceHandle _fh)
  { return FaceFaceIter(*this, _fh); }

  /// const face - vertex circulator
  ConstFaceVertexIter cfv_iter(FaceHandle _fh) const
  { return ConstFaceVertexIter(*this, _fh); }
  /// const face - halfedge circulator
  ConstFaceHalfedgeIter cfh_iter(FaceHandle _fh) const
  { return ConstFaceHalfedgeIter(*this, _fh); }
  /// const face - edge circulator
  ConstFaceEdgeIter cfe_iter(FaceHandle _fh) const
  { return ConstFaceEdgeIter(*this, _fh); }
  /// const face - face circulator
  ConstFaceFaceIter cff_iter(FaceHandle _fh) const
  { return ConstFaceFaceIter(*this, _fh); }
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
  
  // 'begin' circulators
  
  /// vertex - vertex circulator
  VertexVertexIter vv_begin(VertexHandle _vh)
  { return VertexVertexIter(*this, _vh); }
  /// vertex - incoming halfedge circulator
  VertexIHalfedgeIter vih_begin(VertexHandle _vh)
  { return VertexIHalfedgeIter(*this, _vh); }
  /// vertex - outgoing halfedge circulator
  VertexOHalfedgeIter voh_begin(VertexHandle _vh)
  { return VertexOHalfedgeIter(*this, _vh); }
  /// vertex - edge circulator
  VertexEdgeIter ve_begin(VertexHandle _vh)
  { return VertexEdgeIter(*this, _vh); }
  /// vertex - face circulator
  VertexFaceIter vf_begin(VertexHandle _vh)
  { return VertexFaceIter(*this, _vh); }

  /// const vertex circulator
  ConstVertexVertexIter cvv_begin(VertexHandle _vh) const
  { return ConstVertexVertexIter(*this, _vh); }
  /// const vertex - incoming halfedge circulator
  ConstVertexIHalfedgeIter cvih_begin(VertexHandle _vh) const
  { return ConstVertexIHalfedgeIter(*this, _vh); }
  /// const vertex - outgoing halfedge circulator
  ConstVertexOHalfedgeIter cvoh_begin(VertexHandle _vh) const
  { return ConstVertexOHalfedgeIter(*this, _vh); }
  /// const vertex - edge circulator
  ConstVertexEdgeIter cve_begin(VertexHandle _vh) const
  { return ConstVertexEdgeIter(*this, _vh); }
  /// const vertex - face circulator
  ConstVertexFaceIter cvf_begin(VertexHandle _vh) const
  { return ConstVertexFaceIter(*this, _vh); }

  /// face - vertex circulator
  FaceVertexIter fv_begin(FaceHandle _fh)
  { return FaceVertexIter(*this, _fh); }
  /// face - halfedge circulator
  FaceHalfedgeIter fh_begin(FaceHandle _fh)
  { return FaceHalfedgeIter(*this, _fh); }
  /// face - edge circulator
  FaceEdgeIter fe_begin(FaceHandle _fh)
  { return FaceEdgeIter(*this, _fh); }
  /// face - face circulator
  FaceFaceIter ff_begin(FaceHandle _fh)
  { return FaceFaceIter(*this, _fh); }
534
535
536
  /// halfedge circulator
  HalfedgeLoopIter hl_begin(HalfedgeHandle _heh)
  { return HalfedgeLoopIter(*this, _heh); }
537
538
539
540
541
542
543
544
545
546
547
548
549

  /// const face - vertex circulator
  ConstFaceVertexIter cfv_begin(FaceHandle _fh) const
  { return ConstFaceVertexIter(*this, _fh); }
  /// const face - halfedge circulator
  ConstFaceHalfedgeIter cfh_begin(FaceHandle _fh) const
  { return ConstFaceHalfedgeIter(*this, _fh); }
  /// const face - edge circulator
  ConstFaceEdgeIter cfe_begin(FaceHandle _fh) const
  { return ConstFaceEdgeIter(*this, _fh); }
  /// const face - face circulator
  ConstFaceFaceIter cff_begin(FaceHandle _fh) const
  { return ConstFaceFaceIter(*this, _fh); }
550
551
552
  /// const halfedge circulator
  ConstHalfedgeLoopIter chl_begin(HalfedgeHandle _heh) const
  { return ConstHalfedgeLoopIter(*this, _heh); }
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
  
  // 'end' circulators
  
  /// vertex - vertex circulator
  VertexVertexIter vv_end(VertexHandle _vh)
  { return VertexVertexIter(*this, _vh, true); }
  /// vertex - incoming halfedge circulator
  VertexIHalfedgeIter vih_end(VertexHandle _vh)
  { return VertexIHalfedgeIter(*this, _vh, true); }
  /// vertex - outgoing halfedge circulator
  VertexOHalfedgeIter voh_end(VertexHandle _vh)
  { return VertexOHalfedgeIter(*this, _vh, true); }
  /// vertex - edge circulator
  VertexEdgeIter ve_end(VertexHandle _vh)
  { return VertexEdgeIter(*this, _vh, true); }
  /// vertex - face circulator
  VertexFaceIter vf_end(VertexHandle _vh)
  { return VertexFaceIter(*this, _vh, true); }

  /// const vertex circulator
  ConstVertexVertexIter cvv_end(VertexHandle _vh) const
  { return ConstVertexVertexIter(*this, _vh, true); }
  /// const vertex - incoming halfedge circulator
  ConstVertexIHalfedgeIter cvih_end(VertexHandle _vh) const
  { return ConstVertexIHalfedgeIter(*this, _vh, true); }
  /// const vertex - outgoing halfedge circulator
  ConstVertexOHalfedgeIter cvoh_end(VertexHandle _vh) const
  { return ConstVertexOHalfedgeIter(*this, _vh, true); }
  /// const vertex - edge circulator
  ConstVertexEdgeIter cve_end(VertexHandle _vh) const
  { return ConstVertexEdgeIter(*this, _vh, true); }
  /// const vertex - face circulator
  ConstVertexFaceIter cvf_end(VertexHandle _vh) const
  { return ConstVertexFaceIter(*this, _vh, true); }

  /// face - vertex circulator
  FaceVertexIter fv_end(FaceHandle _fh)
  { return FaceVertexIter(*this, _fh, true); }
  /// face - halfedge circulator
  FaceHalfedgeIter fh_end(FaceHandle _fh)
  { return FaceHalfedgeIter(*this, _fh, true); }
  /// face - edge circulator
  FaceEdgeIter fe_end(FaceHandle _fh)
  { return FaceEdgeIter(*this, _fh, true); }
  /// face - face circulator
  FaceFaceIter ff_end(FaceHandle _fh)
  { return FaceFaceIter(*this, _fh, true); }
600
601
602
  /// face - face circulator
  HalfedgeLoopIter hl_end(HalfedgeHandle _heh)
  { return HalfedgeLoopIter(*this, _heh, true); }
603
604
605
606
607
608
609
610
611
612
613
614
615

  /// const face - vertex circulator
  ConstFaceVertexIter cfv_end(FaceHandle _fh) const
  { return ConstFaceVertexIter(*this, _fh, true); }
  /// const face - halfedge circulator
  ConstFaceHalfedgeIter cfh_end(FaceHandle _fh) const
  { return ConstFaceHalfedgeIter(*this, _fh, true); }
  /// const face - edge circulator
  ConstFaceEdgeIter cfe_end(FaceHandle _fh) const
  { return ConstFaceEdgeIter(*this, _fh, true); }
  /// const face - face circulator
  ConstFaceFaceIter cff_end(FaceHandle _fh) const
  { return ConstFaceFaceIter(*this, _fh, true); }
616
617
618
  /// const face - face circulator
  ConstHalfedgeLoopIter chl_end(HalfedgeHandle _heh) const
  { return ConstHalfedgeLoopIter(*this, _heh, true); }
Jan Möbius's avatar
Jan Möbius committed
619
620
  //@}

Jan Möbius's avatar
Jan Möbius committed
621
622
623
624
625

  //===========================================================================
  /** @name Boundary and manifold tests
   * @{ */
  //===========================================================================
626
627
628
629
630
631
632
633

  /** \brief Check if the halfedge is at the boundary
   *
   * The halfedge is at the boundary, if no face is incident to it.
   *
   * @param _heh HalfedgeHandle to test
   * @return boundary?
   */
Jan Möbius's avatar
Jan Möbius committed
634
635
636
  bool is_boundary(HalfedgeHandle _heh) const
  { return ArrayKernel::is_boundary(_heh); }

637
638
639
  /** \brief Is the edge a boundary edge?
   *
   * Checks it the edge _eh is a boundary edge, i.e. is one of its halfedges
Jan Möbius's avatar
Jan Möbius committed
640
   * a boundary halfedge.
641
642
643
644
   *
   * @param _eh Edge handle to test
   * @return boundary?
   */
Jan Möbius's avatar
Jan Möbius committed
645
646
647
648
649
  bool is_boundary(EdgeHandle _eh) const
  {
    return (is_boundary(halfedge_handle(_eh, 0)) ||
            is_boundary(halfedge_handle(_eh, 1)));
  }
650
651
652
653
654
655
656
657
658
659
660
661

  /** \brief Is vertex _vh a boundary vertex ?
   *
   * Checks if the associated halfedge (which would on a boundary be the outside
   * halfedge), is connected to a face. Which is equivalent, if the vertex is
   * at the boundary of the mesh, as OpenMesh will make sure, that if there is a
   * boundary halfedge at the vertex, the halfedge will be the one which is associated
   * to the vertex.
   *
   * @param _vh VertexHandle to test
   * @return boundary?
   */
Jan Möbius's avatar
Jan Möbius committed
662
663
664
665
666
667
  bool is_boundary(VertexHandle _vh) const
  {
    HalfedgeHandle heh(halfedge_handle(_vh));
    return (!(heh.is_valid() && face_handle(heh).is_valid()));
  }

668
669
670
671
672
673
674
675
  /** \brief Check if face is at the boundary
   *
   * Is face _fh at boundary, i.e. is one of its edges (or vertices)
   * a boundary edge?
   *
   * @param _fh Check this face
   * @param _check_vertex If \c true, check the corner vertices of the face, too.
   * @return boundary?
Jan Möbius's avatar
Jan Möbius committed
676
677
   */
  bool is_boundary(FaceHandle _fh, bool _check_vertex=false) const;
678
679
680
681
682
683
684
685
686
687
688

  /** \brief Is (the mesh at) vertex _vh  two-manifold ?
   *
   * The vertex is non-manifold if more than one gap exists, i.e.
   * more than one outgoing boundary halfedge. If (at least) one
   * boundary halfedge exists, the vertex' halfedge must be a
   * boundary halfedge.
   *
   * @param _vh VertexHandle to test
   * @return manifold?
   */
Jan Möbius's avatar
Jan Möbius committed
689
  bool is_manifold(VertexHandle _vh) const;
690

Jan Möbius's avatar
Jan Möbius committed
691
  /** @} */
Jan Möbius's avatar
Jan Möbius committed
692
693
694
695
696
697
698
699
700
701
702
703
704

  // --- shortcuts ---
  
  /// returns the face handle of the opposite halfedge 
  inline FaceHandle opposite_face_handle(HalfedgeHandle _heh) const
  { return face_handle(opposite_halfedge_handle(_heh)); }
    
  // --- misc ---

  /** Adjust outgoing halfedge handle for vertices, so that it is a
      boundary halfedge whenever possible. 
  */
  void adjust_outgoing_halfedge(VertexHandle _vh);
705

Jan Möbius's avatar
Jan Möbius committed
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
  /// Find halfedge from _vh0 to _vh1. Returns invalid handle if not found.
  HalfedgeHandle find_halfedge(VertexHandle _start_vh, VertexHandle _end_vh) const;
  /// Vertex valence
  uint valence(VertexHandle _vh) const;
  /// Face valence
  uint valence(FaceHandle _fh) const;
  
  // --- connectivity operattions 
    
  /** Halfedge collapse: collapse the from-vertex of halfedge _heh
      into its to-vertex.

      \attention Needs vertex/edge/face status attribute in order to
      delete the items that degenerate.

Jan Möbius's avatar
Jan Möbius committed
721
722
      \note The from vertex is marked as deleted while the to vertex will still exist.

Jan Möbius's avatar
Jan Möbius committed
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
      \note This function does not perform a garbage collection. It
      only marks degenerate items as deleted.

      \attention A halfedge collapse may lead to topological inconsistencies.
      Therefore you should check this using is_collapse_ok().  
  */
  void collapse(HalfedgeHandle _heh);
  /** return true if the this the only link between the faces adjacent to _eh.
      _eh is allowed to be boundary, in which case true is returned iff _eh is 
      the only boundary edge of its ajdacent face.
  */
  bool is_simple_link(EdgeHandle _eh) const;
  /** return true if _fh shares only one edge with all of its adjacent faces.
      Boundary is treated as one face, i.e., the function false if _fh has more
      than one boundary edge.
  */
  bool is_simply_connected(FaceHandle _fh) const;
  /** Removes the edge _eh. Its adjacent faces are merged. _eh and one of the 
      adjacent faces are set deleted. The handle of the remaining face is 
      returned (InvalidFaceHandle is returned if _eh is a boundary edge).
      
744
      \pre is_simple_link(_eh). This ensures that there are no hole faces
Jan Möbius's avatar
Jan Möbius committed
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
      or isolated vertices appearing in result of the operation.
      
      \attention Needs the Attributes::Status attribute for edges and faces.
      
      \note This function does not perform a garbage collection. It
      only marks items as deleted.
  */
  FaceHandle remove_edge(EdgeHandle _eh);
  /** Inverse of remove_edge. _eh should be the handle of the edge and the
      vertex and halfedge handles pointed by edge(_eh) should be valid. 
  */
  void reinsert_edge(EdgeHandle _eh);
  /** Inserts an edge between to_vh(_prev_heh) and from_vh(_next_heh).
      A new face is created started at heh0 of the inserted edge and
      its halfedges loop includes both _prev_heh and _next_heh. If an 
      old face existed which includes the argument halfedges, it is 
      split at the new edge. heh0 is returned. 
      
      \note assumes _prev_heh and _next_heh are either boundary or pointed
      to the same face
  */
  HalfedgeHandle insert_edge(HalfedgeHandle _prev_heh, HalfedgeHandle _next_heh);
    
768
769
770
771
772
773
774
775
776
777
778
779
  /** \brief Face split (= 1-to-n split).
     *
     * Split an arbitrary face into triangles by connecting each vertex of fh to vh.
     *
     * \note fh will remain valid (it will become one of the triangles)
     * \note the halfedge handles of the new triangles will point to the old halfeges
     *
     * \note The properties of the new faces and all other new primitives will be undefined!
     *
     * @param _fh Face handle that should be splitted
     * @param _vh Vertex handle of the new vertex that will be inserted in the face
     */
Jan Möbius's avatar
Jan Möbius committed
780
  void split(FaceHandle _fh, VertexHandle _vh);
781

782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
  /** \brief Face split (= 1-to-n split).
   *
   * Split an arbitrary face into triangles by connecting each vertex of fh to vh.
   *
   * \note fh will remain valid (it will become one of the triangles)
   * \note the halfedge handles of the new triangles will point to the old halfeges
   *
   * \note The properties of the new faces will be adjusted to the properties of the original faces
   * \note Properties of the new edges and halfedges will be undefined
   *
   * @param _fh Face handle that should be splitted
   * @param _vh Vertex handle of the new vertex that will be inserted in the face
   */
  void split_copy(FaceHandle _fh, VertexHandle _vh);
  
797
798
799
800
801
802
803
804
805
806
807
808
809
  /** \brief Triangulate the face _fh

    Split an arbitrary face into triangles by connecting
    each vertex of fh after its second to vh.

    \note _fh will remain valid (it will become one of the
      triangles)

    \note The halfedge handles of the new triangles will
      point to the old halfedges

    @param _fh Handle of the face that should be triangulated
  */
Jan Möbius's avatar
Jan Möbius committed
810
  void triangulate(FaceHandle _fh);
811
812
813

  /** \brief triangulate the entire mesh  
  */
Jan Möbius's avatar
Jan Möbius committed
814
815
  void triangulate();
  
816
817
818
819
820
821
822
823
824
825
  /** Edge split (inserts a vertex on the edge only)
   *
   * This edge split only splits the edge without introducing new faces!
   * As this is for polygonal meshes, we can have valence 2 vertices here.
   *
   * \note The properties of the new edges and halfedges will be undefined!
   *
   * @param _eh Handle of the edge, that will be splitted
   * @param _vh Handle of the vertex that will be inserted at the edge
   */
826
827
  void split_edge(EdgeHandle _eh, VertexHandle _vh);

828
829
830
831
832
833
834
835
836
837
838
839
840
  /** Edge split (inserts a vertex on the edge only)
   *
   * This edge split only splits the edge without introducing new faces!
   * As this is for polygonal meshes, we can have valence 2 vertices here.
   *
   * \note The properties of the new edge will be copied from the splitted edge
   * \note Properties of the new halfedges will be undefined
   *
   * @param _eh Handle of the edge, that will be splitted
   * @param _vh Handle of the vertex that will be inserted at the edge
   */
  void split_edge_copy(EdgeHandle _eh, VertexHandle _vh);

Jan Möbius's avatar
Jan Möbius committed
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862

  /** \name Generic handle derefertiation.
      Calls the respective vertex(), halfedge(), edge(), face()
      method of the mesh kernel.
  */
  //@{
  /// Get item from handle
  const Vertex&    deref(VertexHandle _h)   const { return vertex(_h); }
  Vertex&          deref(VertexHandle _h)         { return vertex(_h); }
  const Halfedge&  deref(HalfedgeHandle _h) const { return halfedge(_h); }
  Halfedge&        deref(HalfedgeHandle _h)       { return halfedge(_h); }
  const Edge&      deref(EdgeHandle _h)     const { return edge(_h); }
  Edge&            deref(EdgeHandle _h)           { return edge(_h); }
  const Face&      deref(FaceHandle _h)     const { return face(_h); }
  Face&            deref(FaceHandle _h)           { return face(_h); }
  //@}

protected:  
  /// Helper for halfedge collapse
  void collapse_edge(HalfedgeHandle _hh);
  /// Helper for halfedge collapse
  void collapse_loop(HalfedgeHandle _hh);
863
864
865
866
867
868
869
870
871
872
873
874
875
876



private: // Working storage for add_face()
       struct AddFaceEdgeInfo
       {
               HalfedgeHandle halfedge_handle;
               bool is_new;
               bool needs_adjust;
       };
       std::vector<AddFaceEdgeInfo> edgeData_; //
       std::vector<std::pair<HalfedgeHandle, HalfedgeHandle> > next_cache_; // cache for set_next_halfedge and vertex' set_halfedge
       uint next_cache_count_;

Jan Möbius's avatar
Jan Möbius committed
877
878
879
880
881
};

}//namespace OpenMesh

#endif//OPENMESH_POLYCONNECTIVITY_HH