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Sqrt3InterpolatingSubdividerLabsikGreinerT.hh
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41
51 //=============================================================================
52 //
53 // CLASS InterpolatingSqrt3LGT
54 //
55 //=============================================================================
56
57 #ifndef OPENMESH_SUBDIVIDER_UNIFORM_INTERP_SQRT3T_LABSIK_GREINER_HH
58 #define OPENMESH_SUBDIVIDER_UNIFORM_INTERP_SQRT3T_LABSIK_GREINER_HH
59
60
61 //== INCLUDES =================================================================
62
63 #include <OpenMesh/Core/Mesh/Handles.hh>
64 #include <OpenMesh/Core/System/config.hh>
65 #include <OpenMesh/Tools/Subdivider/Uniform/SubdividerT.hh>
66
67 #if defined(_DEBUG) || defined(DEBUG)
68 // Makes life lot easier, when playing/messing around with low-level topology
69 // changing methods of OpenMesh
70 # include <OpenMesh/Tools/Utils/MeshCheckerT.hh>
71 # define ASSERT_CONSISTENCY( T, m ) \
72 assert(OpenMesh::Utils::MeshCheckerT<T>(m).check())
73 #else
74 # define ASSERT_CONSISTENCY( T, m )
75 #endif
76 // -------------------- STL
77 #include <vector>
78 #if defined(OM_CC_MIPS)
79 # include <math.h>
80 #else
81 # include <cmath>
82 #endif
83
84 //#define MIRROR_TRIANGLES
85 //#define MIN_NORM
86
87 //== NAMESPACE ================================================================
88
89 namespace OpenMesh { // BEGIN_NS_OPENMESH
90 namespace Subdivider { // BEGIN_NS_DECIMATER
91 namespace Uniform { // BEGIN_NS_UNIFORM
92
93
94 //== CLASS DEFINITION =========================================================
95
96
105 template <typename MeshType, typename RealType = double>
106 class InterpolatingSqrt3LGT : public SubdividerT< MeshType, RealType >
107 {
108 public:
109
110 typedef RealType real_t;
111 typedef MeshType mesh_t;
112 typedef SubdividerT< mesh_t, real_t > parent_t;
113
114 typedef std::vector< std::vector<real_t> > weights_t;
115
116 public:
117
118
119 InterpolatingSqrt3LGT(void) : parent_t()
120 { init_weights(); }
121
122 explicit InterpolatingSqrt3LGT(MeshType &_m) : parent_t(_m)
123 { init_weights(); }
124
125 virtual ~InterpolatingSqrt3LGT() {}
126
127
128 public:
129
130
131 const char *name() const override { return "Uniform Interpolating Sqrt3"; }
132
134 void init_weights(size_t _max_valence=50)
135 {
136 weights_.resize(_max_valence);
137
138 weights_[3].resize(4);
139 weights_[3][0] = real_t(+4.0/27);
140 weights_[3][1] = real_t(-5.0/27);
141 weights_[3][2] = real_t(+4.0/27);
142 weights_[3][3] = real_t(+8.0/9);
143
144 weights_[4].resize(5);
145 weights_[4][0] = real_t(+2.0/9);
146 weights_[4][1] = real_t(-1.0/9);
147 weights_[4][2] = real_t(-1.0/9);
148 weights_[4][3] = real_t(+2.0/9);
149 weights_[4][4] = real_t(+7.0/9);
150
151 for(unsigned int K=5; K<_max_valence; ++K)
152 {
153 weights_[K].resize(K+1);
154 double aH = 2.0*cos(M_PI/static_cast<double>(K))/3.0;
155 weights_[K][K] = static_cast<real_t>(1.0 - aH*aH);
156 for(unsigned int i=0; i<K; ++i)
157 {
158
159 weights_[K][i] = static_cast<real_t>((aH*aH + 2.0*aH*cos(2.0*static_cast<double>(i)*M_PI/static_cast<double>(K) + M_PI/static_cast<double>(K)) +
160 2.0*aH*aH*cos(4.0*static_cast<double>(i)*M_PI/static_cast<double>(K) + 2.0*M_PI/static_cast<double>(K)))/static_cast<double>(K));
161 }
162 }
163
164 //just to be sure:
165 weights_[6].resize(0);
166
167 }
168
169
170 protected:
171
172
173 bool prepare( MeshType& _m ) override
174 {
175 _m.request_edge_status();
176 _m.add_property( fp_pos_ );
177 _m.add_property( ep_nv_ );
178 _m.add_property( mp_gen_ );
179 _m.property( mp_gen_ ) = 0;
180
181 return _m.has_edge_status()
182 && ep_nv_.is_valid() && mp_gen_.is_valid();
183 }
184
185
186 bool cleanup( MeshType& _m ) override
187 {
188 _m.release_edge_status();
189 _m.remove_property( fp_pos_ );
190 _m.remove_property( ep_nv_ );
191 _m.remove_property( mp_gen_ );
192 return true;
193 }
194
195
196 bool subdivide( MeshType& _m, size_t _n , const bool _update_points = true) override
197 {
198
200
201 typename MeshType::VertexIter vit;
202 typename MeshType::VertexVertexIter vvit;
203 typename MeshType::EdgeIter eit;
204 typename MeshType::FaceIter fit;
205 typename MeshType::FaceVertexIter fvit;
206 typename MeshType::FaceHalfedgeIter fheit;
207 typename MeshType::VertexHandle vh;
208 typename MeshType::HalfedgeHandle heh;
209 typename MeshType::Point pos(0,0,0), zero(0,0,0);
210 size_t &gen = _m.property( mp_gen_ );
211
212 for (size_t l=0; l<_n; ++l)
213 {
214 // tag existing edges
215 for (eit=_m.edges_begin(); eit != _m.edges_end();++eit)
216 {
217 _m.status( *eit ).set_tagged( true );
218 if ( (gen%2) && _m.is_boundary(*eit) )
219 compute_new_boundary_points( _m, *eit ); // *) creates new vertices
220 }
221
222 // insert new vertices, and store pos in vp_pos_
223 typename MeshType::FaceIter fend = _m.faces_end();
224 for (fit = _m.faces_begin();fit != fend; ++fit)
225 {
226 if (_m.is_boundary(*fit))
227 {
228 if(gen%2)
229 _m.property(fp_pos_, *fit).invalidate();
230 else
231 {
232 //find the interior boundary halfedge
233 for( heh = _m.halfedge_handle(*fit); !_m.is_boundary( _m.opposite_halfedge_handle(heh) ); heh = _m.next_halfedge_handle(heh) )
234 ;
235 assert(_m.is_boundary( _m.opposite_halfedge_handle(heh) ));
236 pos = zero;
237 //check for two boundaries case:
238 if( _m.is_boundary(_m.next_halfedge_handle(heh)) || _m.is_boundary(_m.prev_halfedge_handle(heh)) )
239 {
240 if(_m.is_boundary(_m.prev_halfedge_handle(heh)))
241 heh = _m.prev_halfedge_handle(heh); //ensure that the boundary halfedges are heh and heh->next
242 //check for three boundaries case:
243 if(_m.is_boundary(_m.next_halfedge_handle(_m.next_halfedge_handle(heh))))
244 {
245 //three boundaries, use COG of triangle
246 pos += real_t(1.0/3) * _m.point(_m.to_vertex_handle(heh));
247 pos += real_t(1.0/3) * _m.point(_m.to_vertex_handle(_m.next_halfedge_handle(heh)));
248 pos += real_t(1.0/3) * _m.point(_m.to_vertex_handle(_m.prev_halfedge_handle(heh)));
249 }
250 else
251 {
252 #ifdef MIRROR_TRIANGLES
253 //two boundaries, mirror two triangles
254 pos += real_t(2.0/9) * _m.point(_m.to_vertex_handle(heh));
255 pos += real_t(4.0/9) * _m.point(_m.to_vertex_handle(_m.next_halfedge_handle(heh)));
256 pos += real_t(4.0/9) * _m.point(_m.to_vertex_handle(_m.prev_halfedge_handle(heh)));
257 pos += real_t(-1.0/9) * _m.point(_m.to_vertex_handle(_m.next_halfedge_handle(_m.opposite_halfedge_handle(_m.prev_halfedge_handle(heh)))));
258 #else
259 pos += real_t(7.0/24) * _m.point(_m.to_vertex_handle(heh));
260 pos += real_t(3.0/8) * _m.point(_m.to_vertex_handle(_m.next_halfedge_handle(heh)));
261 pos += real_t(3.0/8) * _m.point(_m.to_vertex_handle(_m.prev_halfedge_handle(heh)));
262 pos += real_t(-1.0/24) * _m.point(_m.to_vertex_handle(_m.next_halfedge_handle(_m.opposite_halfedge_handle(_m.prev_halfedge_handle(heh)))));
263 #endif
264 }
265 }
266 else
267 {
268 vh = _m.to_vertex_handle(_m.next_halfedge_handle(heh));
269 //check last vertex regularity
270 if((_m.valence(vh) == 6) || _m.is_boundary(vh))
271 {
272 #ifdef MIRROR_TRIANGLES
273 //use regular rule and mirror one triangle
274 pos += real_t(5.0/9) * _m.point(vh);
275 pos += real_t(3.0/9) * _m.point(_m.to_vertex_handle(heh));
276 pos += real_t(3.0/9) * _m.point(_m.to_vertex_handle(_m.opposite_halfedge_handle(heh)));
277 pos += real_t(-1.0/9) * _m.point(_m.to_vertex_handle(_m.next_halfedge_handle(_m.opposite_halfedge_handle(_m.next_halfedge_handle(heh)))));
278 pos += real_t(-1.0/9) * _m.point(_m.to_vertex_handle(_m.next_halfedge_handle(_m.opposite_halfedge_handle(_m.prev_halfedge_handle(heh)))));
279 #else
280 #ifdef MIN_NORM
281 pos += real_t(1.0/9) * _m.point(vh);
282 pos += real_t(1.0/3) * _m.point(_m.to_vertex_handle(heh));
283 pos += real_t(1.0/3) * _m.point(_m.to_vertex_handle(_m.opposite_halfedge_handle(heh)));
284 pos += real_t(1.0/9) * _m.point(_m.to_vertex_handle(_m.next_halfedge_handle(_m.opposite_halfedge_handle(_m.next_halfedge_handle(heh)))));
285 pos += real_t(1.0/9) * _m.point(_m.to_vertex_handle(_m.next_halfedge_handle(_m.opposite_halfedge_handle(_m.prev_halfedge_handle(heh)))));
286 #else
287 pos += real_t(1.0/2) * _m.point(vh);
288 pos += real_t(1.0/3) * _m.point(_m.to_vertex_handle(heh));
289 pos += real_t(1.0/3) * _m.point(_m.to_vertex_handle(_m.opposite_halfedge_handle(heh)));
290 pos += real_t(-1.0/12) * _m.point(_m.to_vertex_handle(_m.next_halfedge_handle(_m.opposite_halfedge_handle(_m.next_halfedge_handle(heh)))));
291 pos += real_t(-1.0/12) * _m.point(_m.to_vertex_handle(_m.next_halfedge_handle(_m.opposite_halfedge_handle(_m.prev_halfedge_handle(heh)))));
292 #endif
293 #endif
294 }
295 else
296 {
297 //irregular setting, use usual irregular rule
298 unsigned int K = _m.valence(vh);
299 pos += weights_[K][K]*_m.point(vh);
300 heh = _m.opposite_halfedge_handle( _m.next_halfedge_handle(heh) );
301 for(unsigned int i = 0; i<K; ++i, heh = _m.opposite_halfedge_handle(_m.prev_halfedge_handle(heh)) )
302 {
303 pos += weights_[K][i]*_m.point(_m.to_vertex_handle(heh));
304 }
305 }
306 }
307 vh = _m.add_vertex( pos );
308 _m.property(fp_pos_, *fit) = vh;
309 }
310 }
311 else
312 {
313 pos = zero;
314 int nOrdinary = 0;
315
316 //check number of extraordinary vertices
317 for(fvit = _m.fv_iter( *fit ); fvit.is_valid(); ++fvit)
318 if( (_m.valence(*fvit)) == 6 || _m.is_boundary(*fvit) )
319 ++nOrdinary;
320
321 if(nOrdinary==3)
322 {
323 for(fheit = _m.fh_iter( *fit ); fheit.is_valid(); ++fheit)
324 {
325 //one ring vertex has weight 32/81
326 heh = *fheit;
327 assert(_m.to_vertex_handle(heh).is_valid());
328 pos += real_t(32.0/81) * _m.point(_m.to_vertex_handle(heh));
329 //tip vertex has weight -1/81
330 heh = _m.opposite_halfedge_handle(heh);
331 assert(heh.is_valid());
332 assert(_m.next_halfedge_handle(heh).is_valid());
333 assert(_m.to_vertex_handle(_m.next_halfedge_handle(heh)).is_valid());
334 pos -= real_t(1.0/81) * _m.point(_m.to_vertex_handle(_m.next_halfedge_handle(heh)));
335 //outer vertices have weight -2/81
336 heh = _m.opposite_halfedge_handle(_m.prev_halfedge_handle(heh));
337 assert(heh.is_valid());
338 assert(_m.next_halfedge_handle(heh).is_valid());
339 assert(_m.to_vertex_handle(_m.next_halfedge_handle(heh)).is_valid());
340 pos -= real_t(2.0/81) * _m.point(_m.to_vertex_handle(_m.next_halfedge_handle(heh)));
341 heh = _m.opposite_halfedge_handle(_m.prev_halfedge_handle(heh));
342 assert(heh.is_valid());
343 assert(_m.next_halfedge_handle(heh).is_valid());
344 assert(_m.to_vertex_handle(_m.next_halfedge_handle(heh)).is_valid());
345 pos -= real_t(2.0/81) * _m.point(_m.to_vertex_handle(_m.next_halfedge_handle(heh)));
346 }
347 }
348 else
349 {
350 //only use irregular vertices:
351 for(fheit = _m.fh_iter( *fit ); fheit.is_valid(); ++fheit)
352 {
353 vh = _m.to_vertex_handle(*fheit);
354 if( (_m.valence(vh) != 6) && (!_m.is_boundary(vh)) )
355 {
356 unsigned int K = _m.valence(vh);
357 pos += weights_[K][K]*_m.point(vh);
358 heh = _m.opposite_halfedge_handle( *fheit );
359 for(unsigned int i = 0; i<K; ++i, heh = _m.opposite_halfedge_handle(_m.prev_halfedge_handle(heh)) )
360 {
361 pos += weights_[K][i]*_m.point(_m.to_vertex_handle(heh));
362 }
363 }
364 }
365 pos *= real_t(1.0/(3-nOrdinary));
366 }
367
368 vh = _m.add_vertex( pos );
369 _m.property(fp_pos_, *fit) = vh;
370 }
371 }
372
373 //split faces
374 for (fit = _m.faces_begin();fit != fend; ++fit)
375 {
376 if ( _m.is_boundary(*fit) && (gen%2))
377 {
378 boundary_split( _m, *fit );
379 }
380 else
381 {
382 assert(_m.property(fp_pos_, *fit).is_valid());
383 _m.split( *fit, _m.property(fp_pos_, *fit) );
384 }
385 }
386
387 // flip old edges
388 for (eit=_m.edges_begin(); eit != _m.edges_end(); ++eit)
389 if ( _m.status( *eit ).tagged() && !_m.is_boundary( *eit ) )
390 _m.flip(*eit);
391
392 // Now we have an consistent mesh!
393 ASSERT_CONSISTENCY( MeshType, _m );
394
395 // increase generation by one
396 ++gen;
397 }
398 return true;
399 }
400
401 private:
402
403 // Pre-compute location of new boundary points for odd generations
404 // and store them in the edge property ep_nv_;
405 void compute_new_boundary_points( MeshType& _m,
406 const typename MeshType::EdgeHandle& _eh)
407 {
408 assert( _m.is_boundary(_eh) );
409
410 typename MeshType::HalfedgeHandle heh;
411 typename MeshType::VertexHandle vh1, vh2, vh3, vh4, vhl, vhr;
412 typename MeshType::Point P1, P2, P3, P4;
413
414 /*
415 // *---------*---------*
416 // / \ / \ / \
417 // / \ / \ / \
418 // / \ / \ / \
419 // / \ / \ / \
420 // *---------*--#---#--*---------*
421 //
422 // ^ ^ ^ ^ ^ ^
423 // P1 P2 pl pr P3 P4
424 */
425 // get halfedge pointing from P3 to P2 (outer boundary halfedge)
426
427 heh = _m.halfedge_handle(_eh,
428 _m.is_boundary(_m.halfedge_handle(_eh,1)));
429
430 assert( _m.is_boundary( _m.next_halfedge_handle( heh ) ) );
431 assert( _m.is_boundary( _m.prev_halfedge_handle( heh ) ) );
432
433 vh1 = _m.to_vertex_handle( _m.next_halfedge_handle( heh ) );
434 vh2 = _m.to_vertex_handle( heh );
435 vh3 = _m.from_vertex_handle( heh );
436 vh4 = _m.from_vertex_handle( _m.prev_halfedge_handle( heh ));
437
438 P1 = _m.point(vh1);
439 P2 = _m.point(vh2);
440 P3 = _m.point(vh3);
441 P4 = _m.point(vh4);
442
443 vhl = _m.add_vertex(real_t(-5.0/81)*P1 + real_t(20.0/27)*P2 + real_t(10.0/27)*P3 + real_t(-4.0/81)*P4);
444 vhr = _m.add_vertex(real_t(-5.0/81)*P4 + real_t(20.0/27)*P3 + real_t(10.0/27)*P2 + real_t(-4.0/81)*P1);
445
446 _m.property(ep_nv_, _eh).first = vhl;
447 _m.property(ep_nv_, _eh).second = vhr;
448 }
449
450
451 void boundary_split( MeshType& _m, const typename MeshType::FaceHandle& _fh )
452 {
453 assert( _m.is_boundary(_fh) );
454
455 typename MeshType::VertexHandle vhl, vhr;
456 typename MeshType::FaceEdgeIter fe_it;
457 typename MeshType::HalfedgeHandle heh;
458
459 // find boundary edge
460 for( fe_it=_m.fe_iter( _fh ); fe_it.is_valid() && !_m.is_boundary( *fe_it ); ++fe_it ) {};
461
462 // use precomputed, already inserted but not linked vertices
463 vhl = _m.property(ep_nv_, *fe_it).first;
464 vhr = _m.property(ep_nv_, *fe_it).second;
465
466 /*
467 // *---------*---------*
468 // / \ / \ / \
469 // / \ / \ / \
470 // / \ / \ / \
471 // / \ / \ / \
472 // *---------*--#---#--*---------*
473 //
474 // ^ ^ ^ ^ ^ ^
475 // P1 P2 pl pr P3 P4
476 */
477 // get halfedge pointing from P2 to P3 (inner boundary halfedge)
478
479 heh = _m.halfedge_handle(*fe_it, _m.is_boundary(_m.halfedge_handle(*fe_it,0)));
480
481 typename MeshType::HalfedgeHandle pl_P3;
482
483 // split P2->P3 (heh) in P2->pl (heh) and pl->P3
484 boundary_split( _m, heh, vhl ); // split edge
485 pl_P3 = _m.next_halfedge_handle( heh ); // store next halfedge handle
486 boundary_split( _m, heh ); // split face
487
488 // split pl->P3 in pl->pr and pr->P3
489 boundary_split( _m, pl_P3, vhr );
490 boundary_split( _m, pl_P3 );
491
492 assert( _m.is_boundary( vhl ) && _m.halfedge_handle(vhl).is_valid() );
493 assert( _m.is_boundary( vhr ) && _m.halfedge_handle(vhr).is_valid() );
494 }
495
496 void boundary_split(MeshType& _m,
497 const typename MeshType::HalfedgeHandle& _heh,
498 const typename MeshType::VertexHandle& _vh)
499 {
500 assert( _m.is_boundary( _m.edge_handle(_heh) ) );
501
502 typename MeshType::HalfedgeHandle
503 heh(_heh),
504 opp_heh( _m.opposite_halfedge_handle(_heh) ),
505 new_heh, opp_new_heh;
506 typename MeshType::VertexHandle to_vh(_m.to_vertex_handle(heh));
507 typename MeshType::HalfedgeHandle t_heh;
508
509 /*
510 * P5
511 * *
512 * /|\
513 * / \
514 * / \
515 * / \
516 * / \
517 * /_ heh new \
518 * *-----\*-----\*\-----*
519 * ^ ^ t_heh
520 * _vh to_vh
521 *
522 * P1 P2 P3 P4
523 */
524 // Re-Setting Handles
525
526 // find halfedge point from P4 to P3
527 for(t_heh = heh;
528 _m.next_halfedge_handle(t_heh) != opp_heh;
529 t_heh = _m.opposite_halfedge_handle(_m.next_halfedge_handle(t_heh)))
530 {}
531
532 assert( _m.is_boundary( t_heh ) );
533
534 new_heh = _m.new_edge( _vh, to_vh );
535 opp_new_heh = _m.opposite_halfedge_handle(new_heh);
536
537 // update halfedge connectivity
538 _m.set_next_halfedge_handle(t_heh, opp_new_heh); // P4-P3 -> P3-P2
539 _m.set_next_halfedge_handle(new_heh, _m.next_halfedge_handle(heh)); // P2-P3 -> P3-P5
540 _m.set_next_halfedge_handle(heh, new_heh); // P1-P2 -> P2-P3
541 _m.set_next_halfedge_handle(opp_new_heh, opp_heh); // P3-P2 -> P2-P1
542
543 // both opposite halfedges point to same face
544 _m.set_face_handle(opp_new_heh, _m.face_handle(opp_heh));
545
546 // let heh finally point to new inserted vertex
547 _m.set_vertex_handle(heh, _vh);
548
549 // let heh and new_heh point to same face
550 _m.set_face_handle(new_heh, _m.face_handle(heh));
551
552 // let opp_new_heh be the new outgoing halfedge for to_vh
553 // (replaces for opp_heh)
554 _m.set_halfedge_handle( to_vh, opp_new_heh );
555
556 // let opp_heh be the outgoing halfedge for _vh
557 _m.set_halfedge_handle( _vh, opp_heh );
558 }
559
560 void boundary_split( MeshType& _m,
561 const typename MeshType::HalfedgeHandle& _heh)
562 {
563 assert( _m.is_boundary( _m.opposite_halfedge_handle( _heh ) ) );
564
565 typename MeshType::HalfedgeHandle
566 heh(_heh),
567 n_heh(_m.next_halfedge_handle(heh));
568
569 typename MeshType::VertexHandle
570 to_vh(_m.to_vertex_handle(heh));
571
572 typename MeshType::HalfedgeHandle
573 heh2(_m.new_edge(to_vh,
574 _m.to_vertex_handle(_m.next_halfedge_handle(n_heh)))),
575 heh3(_m.opposite_halfedge_handle(heh2));
576
577 typename MeshType::FaceHandle
578 new_fh(_m.new_face()),
579 fh(_m.face_handle(heh));
580
581 // Relink (half)edges
582 _m.set_face_handle(heh, new_fh);
583 _m.set_face_handle(heh2, new_fh);
584 _m.set_next_halfedge_handle(heh2, _m.next_halfedge_handle(_m.next_halfedge_handle(n_heh)));
585 _m.set_next_halfedge_handle(heh, heh2);
586 _m.set_face_handle( _m.next_halfedge_handle(heh2), new_fh);
587
588 _m.set_next_halfedge_handle(heh3, n_heh);
589 _m.set_next_halfedge_handle(_m.next_halfedge_handle(n_heh), heh3);
590 _m.set_face_handle(heh3, fh);
591
592 _m.set_halfedge_handle( fh, n_heh);
593 _m.set_halfedge_handle(new_fh, heh);
594
595
596 }
597
598 private:
599
600 weights_t weights_;
601 OpenMesh::FPropHandleT< typename MeshType::VertexHandle > fp_pos_;
602 OpenMesh::EPropHandleT< std::pair< typename MeshType::VertexHandle,
603 typename MeshType::VertexHandle> > ep_nv_;
604 OpenMesh::MPropHandleT< size_t > mp_gen_;
605 };
606
607
608 //=============================================================================
609 } // END_NS_UNIFORM
610 } // END_NS_SUBDIVIDER
611 } // END_NS_OPENMESH
612 //=============================================================================
613 #endif // OPENMESH_SUBDIVIDER_UNIFORM_SQRT3T_HH
614 //=============================================================================
OpenMesh::FPropHandleT< typename MeshType::VertexHandle >
OpenMesh::Subdivider::Uniform::InterpolatingSqrt3LGT::subdivide
bool subdivide(MeshType &_m, size_t _n, const bool _update_points=true) override
Subdivide mesh _m _n times.
Definition: Sqrt3InterpolatingSubdividerLabsikGreinerT.hh:196
OpenMesh::Subdivider::Uniform::InterpolatingSqrt3LGT::name
const char * name() const override
Return name of subdivision algorithm.
Definition: Sqrt3InterpolatingSubdividerLabsikGreinerT.hh:131
OpenMesh::BaseHandle::is_valid
bool is_valid() const
The handle is valid iff the index is not negative.
Definition: Handles.hh:72
OpenMesh::Subdivider::Uniform::InterpolatingSqrt3LGT::init_weights
void init_weights(size_t _max_valence=50)
Pre-compute weights.
Definition: Sqrt3InterpolatingSubdividerLabsikGreinerT.hh:134
OpenMesh::EPropHandleT
Handle representing an edge property.
Definition: Property.hh:514
OpenMesh::Subdivider::Uniform::InterpolatingSqrt3LGT::cleanup
bool cleanup(MeshType &_m) override
Cleanup mesh after usage, e.g. remove added properties.
Definition: Sqrt3InterpolatingSubdividerLabsikGreinerT.hh:186
OpenMesh::Subdivider::Uniform::SubdividerT
Abstract base class for uniform subdivision algorithms.
Definition: SubdividerT.hh:88
OpenMesh::Subdivider::Uniform::InterpolatingSqrt3LGT
Uniform Interpolating Sqrt3 subdivision algorithm
Definition: Sqrt3InterpolatingSubdividerLabsikGreinerT.hh:106
OpenMesh::MPropHandleT< size_t >
SubdividerT.hh
OpenMesh
Contains all the mesh ingredients like the polygonal mesh, the triangle mesh, different mesh kernels ...
Definition: MeshItems.hh:59
OpenMesh::Subdivider::Uniform::InterpolatingSqrt3LGT::prepare
bool prepare(MeshType &_m) override
Prepare mesh, e.g. add properties.
Definition: Sqrt3InterpolatingSubdividerLabsikGreinerT.hh:173