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0025479: BRepTools::Clean() cleans all edge polygons, even related to different shapes
[occt.git] / src / BRepTools / BRepTools.cxx
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b311480e 1// Created on: 1993-01-21
2// Created by: Remi LEQUETTE
3// Copyright (c) 1993-1999 Matra Datavision
973c2be1 4// Copyright (c) 1999-2014 OPEN CASCADE SAS
b311480e 5//
973c2be1 6// This file is part of Open CASCADE Technology software library.
b311480e 7//
d5f74e42 8// This library is free software; you can redistribute it and/or modify it under
9// the terms of the GNU Lesser General Public License version 2.1 as published
973c2be1 10// by the Free Software Foundation, with special exception defined in the file
11// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
12// distribution for complete text of the license and disclaimer of any warranty.
b311480e 13//
973c2be1 14// Alternatively, this file may be used under the terms of Open CASCADE
15// commercial license or contractual agreement.
7fd59977 16
17#include <Standard_Stream.hxx>
18
19#include <BRepTools.ixx>
20#include <BRepTools_ShapeSet.hxx>
21#include <BRep_Tool.hxx>
22#include <TopExp.hxx>
23#include <TopExp_Explorer.hxx>
24#include <TopoDS.hxx>
25#include <TopoDS_Iterator.hxx>
26#include <BndLib_Add2dCurve.hxx>
27#include <Geom2dAdaptor_Curve.hxx>
28#include <Geom_Surface.hxx>
29#include <Geom_Curve.hxx>
30#include <Geom2d_Curve.hxx>
31#include <BRepTools_MapOfVertexPnt2d.hxx>
32#include <BRep_CurveRepresentation.hxx>
33#include <BRep_ListIteratorOfListOfCurveRepresentation.hxx>
34#include <BRep_TEdge.hxx>
35#include <TColgp_SequenceOfPnt2d.hxx>
36#include <TColStd_SequenceOfReal.hxx>
9c06009a 37#include <TColStd_Array1OfReal.hxx>
7fd59977 38#include <TColGeom2d_SequenceOfCurve.hxx>
39#include <TopTools_SequenceOfShape.hxx>
40#include <Precision.hxx>
41
42#include <Poly_Triangulation.hxx>
43#include <Poly_PolygonOnTriangulation.hxx>
44#include <TColStd_HArray1OfInteger.hxx>
01697018 45#include <TColStd_MapOfTransient.hxx>
7fd59977 46
47#include <gp_Lin2d.hxx>
48#include <ElCLib.hxx>
49#include <gp_Vec2d.hxx>
50#include <Standard_ErrorHandler.hxx>
51#include <Standard_Failure.hxx>
59495dbe 52#include <Geom_RectangularTrimmedSurface.hxx>
94708556 53#include <OSD_OpenFile.hxx>
7fd59977 54
55#include <errno.h>
56
57//=======================================================================
58//function : UVBounds
59//purpose :
60//=======================================================================
61
62void BRepTools::UVBounds(const TopoDS_Face& F,
63 Standard_Real& UMin, Standard_Real& UMax,
64 Standard_Real& VMin, Standard_Real& VMax)
65{
66 Bnd_Box2d B;
67 AddUVBounds(F,B);
68 B.Get(UMin,VMin,UMax,VMax);
69}
70
71//=======================================================================
72//function : UVBounds
73//purpose :
74//=======================================================================
75
76void BRepTools::UVBounds(const TopoDS_Face& F,
77 const TopoDS_Wire& W,
78 Standard_Real& UMin, Standard_Real& UMax,
79 Standard_Real& VMin, Standard_Real& VMax)
80{
81 Bnd_Box2d B;
82 AddUVBounds(F,W,B);
83 B.Get(UMin,VMin,UMax,VMax);
84}
85
86
87//=======================================================================
88//function : UVBounds
89//purpose :
90//=======================================================================
91
92void BRepTools::UVBounds(const TopoDS_Face& F,
93 const TopoDS_Edge& E,
94 Standard_Real& UMin, Standard_Real& UMax,
95 Standard_Real& VMin, Standard_Real& VMax)
96{
97 Bnd_Box2d B;
98 AddUVBounds(F,E,B);
99 B.Get(UMin,VMin,UMax,VMax);
100}
101
102//=======================================================================
103//function : AddUVBounds
104//purpose :
105//=======================================================================
106
107void BRepTools::AddUVBounds(const TopoDS_Face& FF, Bnd_Box2d& B)
108{
109 TopoDS_Face F = FF;
110 F.Orientation(TopAbs_FORWARD);
111 TopExp_Explorer ex(F,TopAbs_EDGE);
112
113 // fill box for the given face
114 Bnd_Box2d aBox;
115 for (;ex.More();ex.Next()) {
116 BRepTools::AddUVBounds(F,TopoDS::Edge(ex.Current()),aBox);
117 }
118
119 // if the box is empty (face without edges or without pcurves),
120 // get natural bounds
121 if (aBox.IsVoid()) {
122 Standard_Real UMin,UMax,VMin,VMax;
123 TopLoc_Location L;
124 BRep_Tool::Surface(F,L)->Bounds(UMin,UMax,VMin,VMax);
125 aBox.Update(UMin,VMin,UMax,VMax);
126 }
127
128 // add face box to result
129 B.Add ( aBox );
130}
131
132
133//=======================================================================
134//function : AddUVBounds
135//purpose :
136//=======================================================================
7fd59977 137void BRepTools::AddUVBounds(const TopoDS_Face& F,
138 const TopoDS_Wire& W,
139 Bnd_Box2d& B)
140{
141 TopExp_Explorer ex;
142 for (ex.Init(W,TopAbs_EDGE);ex.More();ex.Next()) {
143 BRepTools::AddUVBounds(F,TopoDS::Edge(ex.Current()),B);
144 }
145}
146
147
148//=======================================================================
149//function : AddUVBounds
150//purpose :
151//=======================================================================
59495dbe 152void BRepTools::AddUVBounds(const TopoDS_Face& aF,
153 const TopoDS_Edge& aE,
154 Bnd_Box2d& aB)
7fd59977 155{
59495dbe 156 Standard_Real aT1, aT2, aXmin, aYmin, aXmax, aYmax;
157 Standard_Real aUmin, aUmax, aVmin, aVmax;
158 Bnd_Box2d aBoxC, aBoxS;
159 TopLoc_Location aLoc;
160 //
161 const Handle(Geom2d_Curve) aC2D = BRep_Tool::CurveOnSurface(aE, aF, aT1, aT2);
162 if (aC2D.IsNull()) {
163 return;
164 }
165 //
166 BndLib_Add2dCurve::Add(aC2D, aT1, aT2, 0., aBoxC);
167 aBoxC.Get(aXmin, aYmin, aXmax, aYmax);
168 //
169 Handle(Geom_Surface) aS = BRep_Tool::Surface(aF, aLoc);
170 aS->Bounds(aUmin, aUmax, aVmin, aVmax);
171
172 if(aS->DynamicType() == STANDARD_TYPE(Geom_RectangularTrimmedSurface))
173 {
174 const Handle(Geom_RectangularTrimmedSurface) aSt =
175 Handle(Geom_RectangularTrimmedSurface)::DownCast(aS);
176 aS = aSt->BasisSurface();
7fd59977 177 }
7fd59977 178
59495dbe 179 //
180 if(!aS->IsUPeriodic())
181 {
182 if((aXmin<aUmin) && (aUmin < aXmax))
9c06009a 183 {
59495dbe 184 aXmin=aUmin;
9c06009a 185 }
59495dbe 186 if((aXmin < aUmax) && (aUmax < aXmax))
187 {
188 aXmax=aUmax;
7fd59977 189 }
59495dbe 190 }
7fd59977 191
59495dbe 192 if(!aS->IsVPeriodic())
193 {
194 if((aYmin<aVmin) && (aVmin < aYmax))
195 {
196 aYmin=aVmin;
7fd59977 197 }
cf836671 198
59495dbe 199 if((aYmin < aVmax) && (aVmax < aYmax))
200 {
201 aYmax=aVmax;
202 }
7fd59977 203 }
59495dbe 204
205 aBoxS.Update(aXmin, aYmin, aXmax, aYmax);
206
207 aB.Add(aBoxS);
7fd59977 208}
209
210//=======================================================================
211//function : Update
212//purpose :
213//=======================================================================
214
215void BRepTools::Update(const TopoDS_Vertex&)
216{
217}
218
219//=======================================================================
220//function : Update
221//purpose :
222//=======================================================================
223
224void BRepTools::Update(const TopoDS_Edge&)
225{
226}
227
228//=======================================================================
229//function : Update
230//purpose :
231//=======================================================================
232
233void BRepTools::Update(const TopoDS_Wire&)
234{
235}
236
237//=======================================================================
238//function : Update
239//purpose :
240//=======================================================================
241
242void BRepTools::Update(const TopoDS_Face& F)
243{
244 if (!F.Checked()) {
245 UpdateFaceUVPoints(F);
246 F.TShape()->Checked(Standard_True);
247 }
248}
249
250//=======================================================================
251//function : Update
252//purpose :
253//=======================================================================
254
255void BRepTools::Update(const TopoDS_Shell& S)
256{
257 TopExp_Explorer ex(S,TopAbs_FACE);
258 while (ex.More()) {
259 Update(TopoDS::Face(ex.Current()));
260 ex.Next();
261 }
262}
263
264//=======================================================================
265//function : Update
266//purpose :
267//=======================================================================
268
269void BRepTools::Update(const TopoDS_Solid& S)
270{
271 TopExp_Explorer ex(S,TopAbs_FACE);
272 while (ex.More()) {
273 Update(TopoDS::Face(ex.Current()));
274 ex.Next();
275 }
276}
277
278//=======================================================================
279//function : Update
280//purpose :
281//=======================================================================
282
283void BRepTools::Update(const TopoDS_CompSolid& CS)
284{
285 TopExp_Explorer ex(CS,TopAbs_FACE);
286 while (ex.More()) {
287 Update(TopoDS::Face(ex.Current()));
288 ex.Next();
289 }
290}
291
292//=======================================================================
293//function : Update
294//purpose :
295//=======================================================================
296
297void BRepTools::Update(const TopoDS_Compound& C)
298{
299 TopExp_Explorer ex(C,TopAbs_FACE);
300 while (ex.More()) {
301 Update(TopoDS::Face(ex.Current()));
302 ex.Next();
303 }
304}
305
306//=======================================================================
307//function : Update
308//purpose :
309//=======================================================================
310
311void BRepTools::Update(const TopoDS_Shape& S)
312{
313 switch (S.ShapeType()) {
314
315 case TopAbs_VERTEX :
316 Update(TopoDS::Vertex(S));
317 break;
318
319 case TopAbs_EDGE :
320 Update(TopoDS::Edge(S));
321 break;
322
323 case TopAbs_WIRE :
324 Update(TopoDS::Wire(S));
325 break;
326
327 case TopAbs_FACE :
328 Update(TopoDS::Face(S));
329 break;
330
331 case TopAbs_SHELL :
332 Update(TopoDS::Shell(S));
333 break;
334
335 case TopAbs_SOLID :
336 Update(TopoDS::Solid(S));
337 break;
338
339 case TopAbs_COMPSOLID :
340 Update(TopoDS::CompSolid(S));
341 break;
342
343 case TopAbs_COMPOUND :
344 Update(TopoDS::Compound(S));
345 break;
346
347 default:
348 break;
349
350 }
351}
352
353
354//=======================================================================
355//function : UpdateFaceUVPoints
356//purpose : reset the UV points of a Face
357//=======================================================================
358
359void BRepTools::UpdateFaceUVPoints(const TopoDS_Face& F)
360{
361 // Recompute for each edge the two UV points in order to have the same
362 // UV point on connected edges.
363
364 // First edge loop, store the vertices in a Map with their 2d points
365
366 BRepTools_MapOfVertexPnt2d theVertices;
367 TopoDS_Iterator expE,expV;
368 TopoDS_Iterator EdgeIt,VertIt;
369 TColStd_SequenceOfReal aFSeq, aLSeq;
370 TColGeom2d_SequenceOfCurve aCSeq;
371 TopTools_SequenceOfShape aShSeq;
372 gp_Pnt2d P;
373 Standard_Integer i;
374 // a 3d tolerance for UV !!
375 Standard_Real tolerance = BRep_Tool::Tolerance(F);
376 TColgp_SequenceOfPnt2d emptySequence;
377
378 for (expE.Initialize(F); expE.More(); expE.Next()) {
379 if(expE.Value().ShapeType() != TopAbs_WIRE)
380 continue;
381
382 EdgeIt.Initialize(expE.Value());
383 for( ; EdgeIt.More(); EdgeIt.Next())
384 {
385 const TopoDS_Edge& E = TopoDS::Edge(EdgeIt.Value());
386 Standard_Real f,l;
387 Handle(Geom2d_Curve) C = BRep_Tool::CurveOnSurface(E,F,f,l);
388
389 aFSeq.Append(f);
390 aLSeq.Append(l);
391 aCSeq.Append(C);
392 aShSeq.Append(E);
393
394 if (C.IsNull()) continue;
395
396 for (expV.Initialize(E.Oriented(TopAbs_FORWARD));
397 expV.More(); expV.Next()) {
398
399 const TopoDS_Vertex& V = TopoDS::Vertex(expV.Value());
400
401 TopAbs_Orientation Vori = V.Orientation();
402 if ( Vori == TopAbs_INTERNAL ) {
403 continue;
404 }
405
406 Standard_Real p = BRep_Tool::Parameter(V,E,F);
407 C->D0(p,P);
408 if (!theVertices.IsBound(V))
409 theVertices.Bind(V,emptySequence);
410 TColgp_SequenceOfPnt2d& S = theVertices(V);
411 for (i = 1; i <= S.Length(); i++) {
412 if (P.Distance(S(i)) < tolerance) break;
413 }
414 if (i > S.Length())
415 S.Append(P);
416 }
417 }
418 }
419
420 // second edge loop, update the edges 2d points
421 TopoDS_Vertex Vf,Vl;
422 gp_Pnt2d Pf,Pl;
423
424 for(Standard_Integer j = 1; j <= aShSeq.Length(); j++)
425 {
426 const TopoDS_Edge& E = TopoDS::Edge(aShSeq.Value(j));
427 const Handle(Geom2d_Curve)& C = aCSeq.Value(j);
428 if (C.IsNull()) continue;
429
430 TopExp::Vertices(E,Vf,Vl);
431 if (Vf.IsNull()) {
432 Pf.SetCoord(RealLast(),RealLast());
433 }
434 else {
435 if ( Vf.Orientation() == TopAbs_INTERNAL ) {
436 continue;
437 }
438 const TColgp_SequenceOfPnt2d& seqf = theVertices(Vf);
439 if (seqf.Length() == 1)
440 Pf = seqf(1);
441 else {
442 C->D0(aFSeq.Value(j),Pf);
443 for (i = 1; i <= seqf.Length(); i++) {
444 if (Pf.Distance(seqf(i)) <= tolerance) {
445 Pf = seqf(i);
446 break;
447 }
448 }
449 }
450 }
451 if (Vl.IsNull()) {
452 Pl.SetCoord(RealLast(),RealLast());
453 }
454 else {
455 if ( Vl.Orientation() == TopAbs_INTERNAL ) {
456 continue;
457 }
458 const TColgp_SequenceOfPnt2d& seql = theVertices(Vl);
459 if (seql.Length() == 1)
460 Pl = seql(1);
461 else {
462 C->D0(aLSeq.Value(j),Pl);
463 for (i = 1; i <= seql.Length(); i++) {
464 if (Pl.Distance(seql(i)) <= tolerance) {
465 Pl = seql(i);
466 break;
467 }
468 }
469 }
470 }
471
472 // set the correct points
473 BRep_Tool::SetUVPoints(E,F,Pf,Pl);
474 }
475}
476
477
478
479//=======================================================================
480//function : Compare
481//purpose :
482//=======================================================================
483
484Standard_Boolean BRepTools::Compare(const TopoDS_Vertex& V1,
485 const TopoDS_Vertex& V2)
486{
487 if (V1.IsSame(V2)) return Standard_True;
488 gp_Pnt p1 = BRep_Tool::Pnt(V1);
489 gp_Pnt p2 = BRep_Tool::Pnt(V2);
490 Standard_Real l = p1.Distance(p2);
491 if (l <= BRep_Tool::Tolerance(V1)) return Standard_True;
492 if (l <= BRep_Tool::Tolerance(V2)) return Standard_True;
493 return Standard_False;
494}
495
496//=======================================================================
497//function : Compare
498//purpose :
499//=======================================================================
500
501Standard_Boolean BRepTools::Compare(const TopoDS_Edge& E1,
502 const TopoDS_Edge& E2)
503{
504 if (E1.IsSame(E2)) return Standard_True;
505 return Standard_False;
506}
507
508//=======================================================================
509//function : OuterWire
510//purpose :
511//=======================================================================
512
513TopoDS_Wire BRepTools::OuterWire(const TopoDS_Face& F)
514{
515 TopoDS_Wire Wres;
516 TopExp_Explorer expw (F,TopAbs_WIRE);
517
518 if (expw.More()) {
519 Wres = TopoDS::Wire(expw.Current());
520 expw.Next();
521 if (expw.More()) {
522 Standard_Real UMin, UMax, VMin, VMax;
523 Standard_Real umin, umax, vmin, vmax;
524 BRepTools::UVBounds(F,Wres,UMin,UMax,VMin,VMax);
525 while (expw.More()) {
526 const TopoDS_Wire& W = TopoDS::Wire(expw.Current());
527 BRepTools::UVBounds(F,W,umin, umax, vmin, vmax);
528 if ((umin <= UMin) &&
529 (umax >= UMax) &&
530 (vmin <= VMin) &&
531 (vmax >= VMax)) {
532 Wres = W;
533 UMin = umin;
534 UMax = umax;
535 VMin = vmin;
536 VMax = vmax;
537 }
538 expw.Next();
539 }
540 }
541 }
542 return Wres;
543}
544
7fd59977 545//=======================================================================
546//function : Map3DEdges
547//purpose :
548//=======================================================================
549
550void BRepTools::Map3DEdges(const TopoDS_Shape& S,
551 TopTools_IndexedMapOfShape& M)
552{
553 TopExp_Explorer Ex;
554 for (Ex.Init(S,TopAbs_EDGE); Ex.More(); Ex.Next()) {
555 if (!BRep_Tool::Degenerated(TopoDS::Edge(Ex.Current())))
556 M.Add(Ex.Current());
557 }
558}
559
560//=======================================================================
561//function : Dump
562//purpose :
563//=======================================================================
564
565void BRepTools::Dump(const TopoDS_Shape& Sh, Standard_OStream& S)
566{
567 BRepTools_ShapeSet SS;
568 SS.Add(Sh);
569 SS.Dump(Sh,S);
570 SS.Dump(S);
571}
572
7fd59977 573//=======================================================================
574//function : Write
575//purpose :
576//=======================================================================
577
578void BRepTools::Write(const TopoDS_Shape& Sh, Standard_OStream& S,
579 const Handle(Message_ProgressIndicator)& PR)
580{
581 BRepTools_ShapeSet SS;
582 SS.SetProgress(PR);
583 SS.Add(Sh);
584 SS.Write(S);
585 SS.Write(Sh,S);
586}
587
588
589//=======================================================================
590//function : Read
591//purpose :
592//=======================================================================
593
594void BRepTools::Read(TopoDS_Shape& Sh,
595 istream& S,
596 const BRep_Builder& B,
597 const Handle(Message_ProgressIndicator)& PR)
598{
599 BRepTools_ShapeSet SS(B);
600 SS.SetProgress(PR);
601 SS.Read(S);
602 SS.Read(Sh,S);
603}
604
605//=======================================================================
606//function : Write
607//purpose :
608//=======================================================================
609
610Standard_Boolean BRepTools::Write(const TopoDS_Shape& Sh,
611 const Standard_CString File,
612 const Handle(Message_ProgressIndicator)& PR)
613{
614 ofstream os;
94708556 615 OSD_OpenStream(os, File, ios::out);
7fd59977 616 if (!os.rdbuf()->is_open()) return Standard_False;
617
618 Standard_Boolean isGood = (os.good() && !os.eof());
619 if(!isGood)
620 return isGood;
621
622 BRepTools_ShapeSet SS;
623 SS.SetProgress(PR);
624 SS.Add(Sh);
625
626 os << "DBRep_DrawableShape\n"; // for easy Draw read
627 SS.Write(os);
628 isGood = os.good();
629 if(isGood )
630 SS.Write(Sh,os);
631 os.flush();
632 isGood = os.good();
633
634 errno = 0;
635 os.close();
7fd59977 636 isGood = os.good() && isGood && !errno;
637
638 return isGood;
639}
640
641//=======================================================================
642//function : Read
643//purpose :
644//=======================================================================
645
646Standard_Boolean BRepTools::Read(TopoDS_Shape& Sh,
647 const Standard_CString File,
648 const BRep_Builder& B,
649 const Handle(Message_ProgressIndicator)& PR)
650{
651 filebuf fic;
652 istream in(&fic);
94708556 653 OSD_OpenFileBuf(fic,File,ios::in);
654 if(!fic.is_open()) return Standard_False;
655
7fd59977 656 BRepTools_ShapeSet SS(B);
657 SS.SetProgress(PR);
658 SS.Read(in);
659 if(!SS.NbShapes()) return Standard_False;
660 SS.Read(Sh,in);
661 return Standard_True;
662}
663
664
665//=======================================================================
666//function : Clean
667//purpose :
668//=======================================================================
669
d0a994c7 670void BRepTools::Clean(const TopoDS_Shape& theShape)
7fd59977 671{
d0a994c7 672 BRep_Builder aBuilder;
673 Handle(Poly_Triangulation) aNullTriangulation;
674 Handle(Poly_PolygonOnTriangulation) aNullPoly;
7fd59977 675
d0a994c7 676 if (theShape.IsNull())
677 return;
678
679 TopExp_Explorer aFaceIt(theShape, TopAbs_FACE);
680 for (; aFaceIt.More(); aFaceIt.Next())
681 {
682 const TopoDS_Face& aFace = TopoDS::Face(aFaceIt.Current());
683
684 TopLoc_Location aLoc;
685 const Handle(Poly_Triangulation)& aTriangulation =
686 BRep_Tool::Triangulation(aFace, aLoc);
687
688 if (aTriangulation.IsNull())
689 continue;
690
691 // Nullify edges
692 TopExp_Explorer aEdgeIt(aFace, TopAbs_EDGE);
693 for (; aEdgeIt.More(); aEdgeIt.Next())
694 {
695 const TopoDS_Edge& aEdge = TopoDS::Edge(aEdgeIt.Current());
696 aBuilder.UpdateEdge(aEdge, aNullPoly, aTriangulation, aLoc);
7fd59977 697 }
d0a994c7 698
699 aBuilder.UpdateFace(aFace, aNullTriangulation);
7fd59977 700 }
701}
702
01697018
J		 703//=======================================================================
704//function : RemoveUnusedPCurves
705//purpose :
706//=======================================================================
707
708void BRepTools::RemoveUnusedPCurves(const TopoDS_Shape& S)
709{
710 TColStd_MapOfTransient UsedSurfaces;
711
712 TopExp_Explorer Explo(S, TopAbs_FACE);
713 for (; Explo.More(); Explo.Next())
714 {
715 TopoDS_Face aFace = TopoDS::Face(Explo.Current());
716 TopLoc_Location aLoc;
717 Handle(Geom_Surface) aSurf = BRep_Tool::Surface(aFace, aLoc);
718 UsedSurfaces.Add(aSurf);
719 }
720
721 TopTools_IndexedMapOfShape Emap;
722 TopExp::MapShapes(S, TopAbs_EDGE, Emap);
7fd59977 723
01697018
J		 724 Standard_Integer i;
725 for (i = 1; i <= Emap.Extent(); i++)
726 {
727 const Handle(BRep_TEdge)& TE = *((Handle(BRep_TEdge)*) &Emap(i).TShape());
728 BRep_ListOfCurveRepresentation& lcr = TE -> ChangeCurves();
729 BRep_ListIteratorOfListOfCurveRepresentation itrep(lcr );
730 while (itrep.More())
731 {
732 Standard_Boolean ToRemove = Standard_False;
733
734 Handle(BRep_CurveRepresentation) CurveRep = itrep.Value();
735 if (CurveRep->IsCurveOnSurface())
736 {
737 Handle(Geom_Surface) aSurface = CurveRep->Surface();
738 if (!UsedSurfaces.Contains(aSurface))
739 ToRemove = Standard_True;
740 }
741 else if (CurveRep->IsRegularity())
742 {
743 Handle(Geom_Surface) Surf1 = CurveRep->Surface();
744 Handle(Geom_Surface) Surf2 = CurveRep->Surface2();
745 ToRemove = (!UsedSurfaces.Contains(Surf1) || !UsedSurfaces.Contains(Surf2));
746 }
747
748 if (ToRemove)
749 lcr.Remove(itrep);
750 else
751 itrep.Next();
752 }
753 }
754}
7fd59977 755
756//=======================================================================
757//function : Triangulation
758//purpose :
759//=======================================================================
760
761Standard_Boolean BRepTools::Triangulation(const TopoDS_Shape& S,
762 const Standard_Real deflec)
763{
764 TopExp_Explorer exf, exe;
765 TopLoc_Location l;
766 Handle(Poly_Triangulation) T;
767 Handle(Poly_PolygonOnTriangulation) Poly;
768
769 for (exf.Init(S, TopAbs_FACE); exf.More(); exf.Next()) {
770 const TopoDS_Face& F = TopoDS::Face(exf.Current());
771 T = BRep_Tool::Triangulation(F, l);
772 if (T.IsNull() || (T->Deflection() > deflec))
773 return Standard_False;
774 for (exe.Init(F, TopAbs_EDGE); exe.More(); exe.Next()) {
775 const TopoDS_Edge& E = TopoDS::Edge(exe.Current());
776 Poly = BRep_Tool::PolygonOnTriangulation(E, T, l);
777 if (Poly.IsNull()) return Standard_False;
778 }
779 }
780 return Standard_True;
781}
782
783
784//=======================================================================
785//function : IsReallyClosed
786//purpose :
787//=======================================================================
788
789Standard_Boolean BRepTools::IsReallyClosed(const TopoDS_Edge& E,
790 const TopoDS_Face& F)
791{
792 if (!BRep_Tool::IsClosed(E,F)) {
793 return Standard_False;
794 }
795 Standard_Integer nbocc = 0;
796 TopExp_Explorer exp;
797 for (exp.Init(F,TopAbs_EDGE);exp.More();exp.Next()) {
798 if (exp.Current().IsSame(E)) {
799 nbocc++;
800 }
801 }
802 return nbocc == 2;
803}
804
805
806
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