0024023: Revamp the OCCT Handle -- downcast (automatic)
[occt.git] / src / BRepLib / BRepLib.cxx
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b311480e 1// Created on: 1993-12-15
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.
b311480e 16
17//pmn 26/09/97 Add parameters of approximation in BuildCurve3d
7fd59977 18// Modified by skv - Thu Jun 3 12:39:19 2004 OCC5898
19
20#include <BRepLib.ixx>
21#include <BRepAdaptor_Surface.hxx>
22#include <BRepAdaptor_HSurface.hxx>
23#include <BRepAdaptor_HCurve2d.hxx>
24#include <BRep_Tool.hxx>
25#include <BRep_Builder.hxx>
26#include <Geom_Surface.hxx>
27#include <Geom_RectangularTrimmedSurface.hxx>
28#include <Geom_Plane.hxx>
29#include <Geom_Curve.hxx>
30#include <Geom_BSplineCurve.hxx>
31#include <Geom_TrimmedCurve.hxx>
32#include <Geom2d_Curve.hxx>
33#include <Geom2d_TrimmedCurve.hxx>
34#include <Geom2d_BSplineCurve.hxx>
35#include <GeomLib.hxx>
36#include <TopExp_Explorer.hxx>
37#include <TopoDS.hxx>
38#include <TopoDS_Edge.hxx>
39#include <TopoDS_Face.hxx>
40#include <TopoDS_Vertex.hxx>
41#include <TopTools_MapOfShape.hxx>
42#include <TopTools_IndexedDataMapOfShapeListOfShape.hxx>
43#include <TopTools_ListIteratorOfListOfShape.hxx>
44#include <TopExp.hxx>
45#include <gp.hxx>
46#include <gp_Ax2.hxx>
47#include <gp_Pln.hxx>
48#include <Standard_Real.hxx>
49#include <Precision.hxx>
50#include <BRep_GCurve.hxx>
51#include <BRep_TEdge.hxx>
52#include <BRep_TFace.hxx>
53#include <AppParCurves_MultiCurve.hxx>
54#include <AppParCurves_MultiBSpCurve.hxx>
55#include <BRep_ListOfCurveRepresentation.hxx>
56#include <BRep_CurveRepresentation.hxx>
57#include <BRep_ListIteratorOfListOfCurveRepresentation.hxx>
58#include <BRep_TVertex.hxx>
41194117 59#include <AdvApprox_ApproxAFunction.hxx>
7fd59977 60#include <Approx_SameParameter.hxx>
61#include <TColgp_Array1OfPnt.hxx>
62#include <TColgp_Array1OfPnt2d.hxx>
63#include <TColStd_Array1OfReal.hxx>
7fd59977 64#include <TColStd_MapOfTransient.hxx>
65#include <GeomAdaptor_Curve.hxx>
66#include <GeomAdaptor_HCurve.hxx>
67#include <GeomAdaptor_Surface.hxx>
68#include <GeomAdaptor_HSurface.hxx>
69#include <Geom2dAdaptor_Curve.hxx>
70#include <Geom2dAdaptor_HCurve.hxx>
71#include <Geom2dAdaptor.hxx>
72#include <Geom2dConvert.hxx>
73#include <GCPnts_QuasiUniformDeflection.hxx>
74#include <BSplCLib.hxx>
75#include <ElSLib.hxx>
76#include <Adaptor3d_CurveOnSurface.hxx>
77#include <Extrema_LocateExtPC.hxx>
78#include <ProjLib_ProjectedCurve.hxx>
79#include <BRepClass3d_SolidClassifier.hxx>
80#include <Bnd_Box.hxx>
81#include <BRepBndLib.hxx>
82#include <Approx_CurvilinearParameter.hxx>
83#include <Geom_BSplineSurface.hxx>
84
7693827d 85#include <Poly_Triangulation.hxx>
86#include <TShort_HArray1OfShortReal.hxx>
87#include <GeomLProp_SLProps.hxx>
88#include <Poly_PolygonOnTriangulation.hxx>
7fd59977 89
41194117 90// TODO - not thread-safe static variables
7fd59977 91static Standard_Real thePrecision = Precision::Confusion();
92static Handle(Geom_Plane) thePlane;
93
94//=======================================================================
95//function : Precision
96//purpose :
97//=======================================================================
98
99void BRepLib::Precision(const Standard_Real P)
100{
101 thePrecision = P;
102}
103
104//=======================================================================
105//function : Precision
106//purpose :
107//=======================================================================
108
109Standard_Real BRepLib::Precision()
110{
111 return thePrecision;
112}
113
114//=======================================================================
115//function : Plane
116//purpose :
117//=======================================================================
118
119void BRepLib::Plane(const Handle(Geom_Plane)& P)
120{
121 thePlane = P;
122}
123
124
125//=======================================================================
126//function : Plane
127//purpose :
128//=======================================================================
129
130const Handle(Geom_Plane)& BRepLib::Plane()
131{
132 if (thePlane.IsNull()) thePlane = new Geom_Plane(gp::XOY());
133 return thePlane;
134}
135//=======================================================================
136//function : CheckSameRange
137//purpose :
138//=======================================================================
139
140Standard_Boolean BRepLib::CheckSameRange(const TopoDS_Edge& AnEdge,
a86d3ec0 141 const Standard_Real Tolerance)
7fd59977 142{
143 Standard_Boolean IsSameRange = Standard_True,
a86d3ec0 144 first_time_in = Standard_True ;
7fd59977 145
146 BRep_ListIteratorOfListOfCurveRepresentation an_Iterator
147 ((*((Handle(BRep_TEdge)*)&AnEdge.TShape()))->ChangeCurves());
a86d3ec0 148
7fd59977 149 Standard_Real first, last;
7fd59977 150 Standard_Real current_first =0., current_last =0. ;
7fd59977 151 Handle(BRep_GCurve) geometric_representation_ptr ;
152
153 while (IsSameRange && an_Iterator.More()) {
154 geometric_representation_ptr =
155 Handle(BRep_GCurve)::DownCast(an_Iterator.Value());
156 if (!geometric_representation_ptr.IsNull()) {
a86d3ec0 157
158 first = geometric_representation_ptr->First();
159 last = geometric_representation_ptr->Last();
160 if (first_time_in ) {
161 current_first = first ;
162 current_last = last ;
163 first_time_in = Standard_False ;
7fd59977 164 }
a86d3ec0 165 else {
166 IsSameRange = (Abs(current_first - first) <= Tolerance)
167 && (Abs(current_last -last) <= Tolerance ) ;
168 }
169 }
7fd59977 170 an_Iterator.Next() ;
171 }
172 return IsSameRange ;
173}
a86d3ec0 174
7fd59977 175//=======================================================================
176//function : SameRange
177//purpose :
178//=======================================================================
179
180void BRepLib::SameRange(const TopoDS_Edge& AnEdge,
a86d3ec0 181 const Standard_Real Tolerance)
7fd59977 182{
183 BRep_ListIteratorOfListOfCurveRepresentation an_Iterator
184 ((*((Handle(BRep_TEdge)*)&AnEdge.TShape()))->ChangeCurves());
a86d3ec0 185
7fd59977 186 Handle(Geom2d_Curve) Curve2dPtr, Curve2dPtr2, NewCurve2dPtr, NewCurve2dPtr2;
187 TopLoc_Location LocalLoc ;
188
189 Standard_Boolean first_time_in = Standard_True,
a86d3ec0 190 has_curve,
191 has_closed_curve ;
7fd59977 192 Handle(BRep_GCurve) geometric_representation_ptr ;
193 Standard_Real first,
a86d3ec0 194 current_first,
195 last,
196 current_last ;
7fd59977 197
198 const Handle(Geom_Curve) C = BRep_Tool::Curve(AnEdge,
a86d3ec0 199 LocalLoc,
200 current_first,
201 current_last);
7fd59977 202 if (!C.IsNull()) {
203 first_time_in = Standard_False ;
204 }
a86d3ec0 205
7fd59977 206 while (an_Iterator.More()) {
207 geometric_representation_ptr =
208 Handle(BRep_GCurve)::DownCast(an_Iterator.Value());
209 if (! geometric_representation_ptr.IsNull()) {
210 has_closed_curve =
a86d3ec0 211 has_curve = Standard_False ;
7fd59977 212 first = geometric_representation_ptr->First();
213 last = geometric_representation_ptr->Last();
214 if (geometric_representation_ptr->IsCurveOnSurface()) {
a86d3ec0 215 Curve2dPtr = geometric_representation_ptr->PCurve() ;
216 has_curve = Standard_True ;
7fd59977 217 }
218 if (geometric_representation_ptr->IsCurveOnClosedSurface()) {
a86d3ec0 219 Curve2dPtr2 = geometric_representation_ptr->PCurve2() ;
220 has_closed_curve = Standard_True ;
7fd59977 221 }
222 if (has_curve || has_closed_curve) {
a86d3ec0 223 if (first_time_in) {
224 current_first = first ;
225 current_last = last ;
226 first_time_in = Standard_False ;
7fd59977 227 }
a86d3ec0 228
7fd59977 229 if (Abs(first - current_first) > Precision::Confusion() ||
a86d3ec0 230 Abs(last - current_last) > Precision::Confusion() )
231 {
232 if (has_curve)
233 {
234 GeomLib::SameRange(Tolerance,
235 Curve2dPtr,
236 geometric_representation_ptr->First(),
237 geometric_representation_ptr->Last(),
238 current_first,
239 current_last,
240 NewCurve2dPtr);
241 geometric_representation_ptr->PCurve(NewCurve2dPtr) ;
242 }
243 if (has_closed_curve)
244 {
245 GeomLib::SameRange(Tolerance,
246 Curve2dPtr2,
247 geometric_representation_ptr->First(),
248 geometric_representation_ptr->Last(),
249 current_first,
250 current_last,
251 NewCurve2dPtr2);
252 geometric_representation_ptr->PCurve2(NewCurve2dPtr2) ;
253 }
254 }
7fd59977 255 }
256 }
257 an_Iterator.Next() ;
258 }
259 BRep_Builder B;
260 B.Range(TopoDS::Edge(AnEdge),
a86d3ec0 261 current_first,
262 current_last) ;
7fd59977 263
264 B.SameRange(AnEdge,
a86d3ec0 265 Standard_True) ;
7fd59977 266}
267
268//=======================================================================
269//function : EvaluateMaxSegment
270//purpose : return MaxSegment to pass in approximation, if MaxSegment==0 provided
271//=======================================================================
272
273static Standard_Integer evaluateMaxSegment(const Standard_Integer aMaxSegment,
a86d3ec0 274 const Adaptor3d_CurveOnSurface& aCurveOnSurface)
7fd59977 275{
276 if (aMaxSegment != 0) return aMaxSegment;
277
278 Handle(Adaptor3d_HSurface) aSurf = aCurveOnSurface.GetSurface();
279 Handle(Adaptor2d_HCurve2d) aCurv2d = aCurveOnSurface.GetCurve();
280
281 Standard_Real aNbSKnots = 0, aNbC2dKnots = 0;
a86d3ec0 282
7fd59977 283 if (aSurf->GetType() == GeomAbs_BSplineSurface) {
284 Handle(Geom_BSplineSurface) aBSpline = aSurf->BSpline();
285 aNbSKnots = Max(aBSpline->NbUKnots(), aBSpline->NbVKnots());
286 }
287 if (aCurv2d->GetType() == GeomAbs_BSplineCurve) {
288 aNbC2dKnots = aCurv2d->NbKnots();
289 }
290 Standard_Integer aReturn = (Standard_Integer) ( 30 + Max(aNbSKnots, aNbC2dKnots) ) ;
291 return aReturn;
292}
293
294//=======================================================================
295//function : BuildCurve3d
296//purpose :
297//=======================================================================
298
299Standard_Boolean BRepLib::BuildCurve3d(const TopoDS_Edge& AnEdge,
a86d3ec0 300 const Standard_Real Tolerance,
301 const GeomAbs_Shape Continuity,
302 const Standard_Integer MaxDegree,
303 const Standard_Integer MaxSegment)
7fd59977 304{
305 Standard_Integer //ErrorCode,
a86d3ec0 306 // ReturnCode = 0,
307 ii,
308 // num_knots,
309 jj;
7fd59977 310
311 TopLoc_Location LocalLoc,L[2],LC;
312 Standard_Real f,l,fc,lc, first[2], last[2],
a86d3ec0 313 tolerance,
314 max_deviation,
315 average_deviation ;
7fd59977 316 Handle(Geom2d_Curve) Curve2dPtr, Curve2dArray[2] ;
317 Handle(Geom_Surface) SurfacePtr, SurfaceArray[2] ;
318
319 Standard_Integer not_done ;
320 // if the edge has a 3d curve returns true
321
322
323 const Handle(Geom_Curve) C = BRep_Tool::Curve(AnEdge,LocalLoc,f,l);
324 if (!C.IsNull())
325 return Standard_True;
a86d3ec0 326 //
327 // this should not exists but UpdateEdge makes funny things
328 // if the edge is not same range
329 //
7fd59977 330 if (! CheckSameRange(AnEdge,
a86d3ec0 331 Precision::Confusion())) {
332 SameRange(AnEdge,
333 Tolerance) ;
7fd59977 334 }
335
a86d3ec0 336
7fd59977 337
338 // search a curve on a plane
339 Handle(Geom_Surface) S;
340 Handle(Geom2d_Curve) PC;
341 Standard_Integer i = 0;
342 Handle(Geom_Plane) P;
343 not_done = 1 ;
344
345 while (not_done) {
346 i++;
347 BRep_Tool::CurveOnSurface(AnEdge,PC,S,LocalLoc,f,l,i);
348 Handle(Geom_RectangularTrimmedSurface) RT =
349 Handle(Geom_RectangularTrimmedSurface)::DownCast(S);
350 if ( RT.IsNull()) {
351 P = Handle(Geom_Plane)::DownCast(S);
352 }
353 else {
354 P = Handle(Geom_Plane)::DownCast(RT->BasisSurface());
355 }
356 not_done = ! (S.IsNull() || !P.IsNull()) ;
357 }
358 if (! P.IsNull()) {
359 // compute the 3d curve
360 gp_Ax2 axes = P->Position().Ax2();
361 Handle(Geom_Curve) C3d = GeomLib::To3d(axes,PC);
dfc06d1f
A
362 if (C3d.IsNull())
363 return Standard_False;
7fd59977 364 // update the edge
365 Standard_Real First, Last;
366
367 BRep_Builder B;
7fd59977 368 B.UpdateEdge(AnEdge,C3d,LocalLoc,0.0e0);
369 BRep_Tool::Range(AnEdge, S, LC, First, Last);
0d969553 370 B.Range(AnEdge, First, Last); //Do not forget 3D range.(PRO6412)
7fd59977 371 }
372 else {
373 //
374 // compute the 3d curve using existing surface
375 //
376 fc = f ;
377 lc = l ;
378 if (!BRep_Tool::Degenerated(AnEdge)) {
379 jj = 0 ;
380 for (ii = 0 ; ii < 3 ; ii++ ) {
a86d3ec0 381 BRep_Tool::CurveOnSurface(TopoDS::Edge(AnEdge),
382 Curve2dPtr,
383 SurfacePtr,
384 LocalLoc,
385 fc,
386 lc,
387 ii) ;
388
389 if (!Curve2dPtr.IsNull() && jj < 2){
390 Curve2dArray[jj] = Curve2dPtr ;
391 SurfaceArray[jj] = SurfacePtr ;
392 L[jj] = LocalLoc ;
393 first[jj] = fc ;
394 last[jj] = lc ;
395 jj += 1 ;
396 }
7fd59977 397 }
398 f = first[0] ;
399 l = last[0] ;
400 Curve2dPtr = Curve2dArray[0] ;
401 SurfacePtr = SurfaceArray[0] ;
a86d3ec0 402
7fd59977 403 Geom2dAdaptor_Curve AnAdaptor3dCurve2d (Curve2dPtr, f, l) ;
404 GeomAdaptor_Surface AnAdaptor3dSurface (SurfacePtr) ;
405 Handle(Geom2dAdaptor_HCurve) AnAdaptor3dCurve2dPtr =
a86d3ec0 406 new Geom2dAdaptor_HCurve(AnAdaptor3dCurve2d) ;
7fd59977 407 Handle(GeomAdaptor_HSurface) AnAdaptor3dSurfacePtr =
a86d3ec0 408 new GeomAdaptor_HSurface (AnAdaptor3dSurface) ;
7fd59977 409 Adaptor3d_CurveOnSurface CurveOnSurface( AnAdaptor3dCurve2dPtr,
a86d3ec0 410 AnAdaptor3dSurfacePtr) ;
411
7fd59977 412 Handle(Geom_Curve) NewCurvePtr ;
413
414 GeomLib::BuildCurve3d(Tolerance,
a86d3ec0 415 CurveOnSurface,
416 f,
417 l,
418 NewCurvePtr,
419 max_deviation,
420 average_deviation,
421 Continuity,
422 MaxDegree,
423 evaluateMaxSegment(MaxSegment,CurveOnSurface)) ;
7fd59977 424 BRep_Builder B;
425 tolerance = BRep_Tool::Tolerance(AnEdge) ;
426 //Patch
427 //max_deviation = Max(tolerance, max_deviation) ;
428 max_deviation = Max( tolerance, Tolerance );
dfc06d1f
A
429 if (NewCurvePtr.IsNull())
430 return Standard_False;
7fd59977 431 B.UpdateEdge(TopoDS::Edge(AnEdge),
a86d3ec0 432 NewCurvePtr,
433 L[0],
434 max_deviation) ;
7fd59977 435 if (jj == 1 ) {
a86d3ec0 436 //
437 // if there is only one curve on surface attached to the edge
438 // than it can be qualified sameparameter
439 //
440 B.SameParameter(TopoDS::Edge(AnEdge),
441 Standard_True) ;
7fd59977 442 }
443 }
444 else {
445 return Standard_False ;
446 }
a86d3ec0 447
7fd59977 448 }
449 return Standard_True;
450}
451//=======================================================================
452//function : BuildCurves3d
453//purpose :
454//=======================================================================
455
456Standard_Boolean BRepLib::BuildCurves3d(const TopoDS_Shape& S)
457
458{
459 return BRepLib::BuildCurves3d(S,
a86d3ec0 460 1.0e-5) ;
7fd59977 461}
462
463//=======================================================================
464//function : BuildCurves3d
465//purpose :
466//=======================================================================
467
468Standard_Boolean BRepLib::BuildCurves3d(const TopoDS_Shape& S,
a86d3ec0 469 const Standard_Real Tolerance,
470 const GeomAbs_Shape Continuity,
471 const Standard_Integer MaxDegree,
472 const Standard_Integer MaxSegment)
7fd59977 473{
474 Standard_Boolean boolean_value,
a86d3ec0 475 ok = Standard_True;
7fd59977 476 TopTools_MapOfShape a_counter ;
477 TopExp_Explorer ex(S,TopAbs_EDGE);
478
479 while (ex.More()) {
480 if (a_counter.Add(ex.Current())) {
481 boolean_value =
a86d3ec0 482 BuildCurve3d(TopoDS::Edge(ex.Current()),
483 Tolerance, Continuity,
484 MaxDegree, MaxSegment);
7fd59977 485 ok = ok && boolean_value ;
486 }
487 ex.Next();
488 }
489 return ok;
490}
491//=======================================================================
492//function : UpdateEdgeTolerance
493//purpose :
494//=======================================================================
495
496Standard_Boolean BRepLib::UpdateEdgeTol(const TopoDS_Edge& AnEdge,
a86d3ec0 497 const Standard_Real MinToleranceRequested,
498 const Standard_Real MaxToleranceToCheck)
499{
500
501 Standard_Integer curve_on_surface_index,
502 curve_index,
503 not_done,
504 has_closed_curve,
505 has_curve,
506 jj,
507 ii,
508 geom_reference_curve_flag = 0,
509 max_sampling_points = 90,
510 min_sampling_points = 30 ;
511
512 Standard_Real factor = 100.0e0,
513 // sampling_array[2],
514 safe_factor = 1.4e0,
515 current_last,
516 current_first,
517 max_distance,
518 coded_edge_tolerance,
519 edge_tolerance = 0.0e0 ;
520 Handle(TColStd_HArray1OfReal) parameters_ptr ;
521 Handle(BRep_GCurve) geometric_representation_ptr ;
522
523 if (BRep_Tool::Degenerated(AnEdge)) return Standard_False ;
524 coded_edge_tolerance = BRep_Tool::Tolerance(AnEdge) ;
525 if (coded_edge_tolerance > MaxToleranceToCheck) return Standard_False ;
526
527 const Handle(BRep_TEdge)& TE = *((Handle(BRep_TEdge)*)&AnEdge.TShape());
528 BRep_ListOfCurveRepresentation& list_curve_rep = TE->ChangeCurves() ;
529 BRep_ListIteratorOfListOfCurveRepresentation an_iterator(list_curve_rep),
530 second_iterator(list_curve_rep) ;
531 Handle(Geom2d_Curve) curve2d_ptr, new_curve2d_ptr;
532 Handle(Geom_Surface) surface_ptr ;
533 TopLoc_Location local_location ;
534 GCPnts_QuasiUniformDeflection a_sampler ;
535 GeomAdaptor_Curve geom_reference_curve ;
536 Adaptor3d_CurveOnSurface curve_on_surface_reference ;
537 Handle(Geom_Curve) C = BRep_Tool::Curve(AnEdge,
538 local_location,
539 current_first,
540 current_last);
541 curve_on_surface_index = -1 ;
542 if (!C.IsNull()) {
543 if (! local_location.IsIdentity()) {
544 C = Handle(Geom_Curve)::
545 DownCast(C-> Transformed(local_location.Transformation()) ) ;
7fd59977 546 }
a86d3ec0 547 geom_reference_curve.Load(C) ;
548 geom_reference_curve_flag = 1 ;
549 a_sampler.Initialize(geom_reference_curve,
550 MinToleranceRequested * factor,
551 current_first,
552 current_last) ;
553 }
554 else {
555 not_done = 1 ;
556 curve_on_surface_index = 0 ;
557
558 while (not_done && an_iterator.More()) {
559 geometric_representation_ptr =
560 Handle(BRep_GCurve)::DownCast(second_iterator.Value());
561 if (!geometric_representation_ptr.IsNull()
562 && geometric_representation_ptr->IsCurveOnSurface()) {
563 curve2d_ptr = geometric_representation_ptr->PCurve() ;
564 local_location = geometric_representation_ptr->Location() ;
565 current_first = geometric_representation_ptr->First();
566 //first = geometric_representation_ptr->First();
567 current_last = geometric_representation_ptr->Last();
568 // must be inverted
569 //
570 if (! local_location.IsIdentity() ) {
571 surface_ptr = Handle(Geom_Surface)::
572 DownCast( geometric_representation_ptr->Surface()->
573 Transformed(local_location.Transformation()) ) ;
574 }
575 else {
576 surface_ptr =
577 geometric_representation_ptr->Surface() ;
578 }
579 not_done = 0 ;
7fd59977 580 }
a86d3ec0 581 curve_on_surface_index += 1 ;
7fd59977 582 }
a86d3ec0 583 Geom2dAdaptor_Curve AnAdaptor3dCurve2d (curve2d_ptr) ;
584 GeomAdaptor_Surface AnAdaptor3dSurface (surface_ptr) ;
585 Handle(Geom2dAdaptor_HCurve) AnAdaptor3dCurve2dPtr =
586 new Geom2dAdaptor_HCurve(AnAdaptor3dCurve2d) ;
587 Handle(GeomAdaptor_HSurface) AnAdaptor3dSurfacePtr =
588 new GeomAdaptor_HSurface (AnAdaptor3dSurface) ;
589 curve_on_surface_reference.Load( AnAdaptor3dCurve2dPtr) ;
590 curve_on_surface_reference.Load( AnAdaptor3dSurfacePtr) ;
591 a_sampler.Initialize(curve_on_surface_reference,
592 MinToleranceRequested * factor,
593 current_first,
594 current_last) ;
595 }
596 TColStd_Array1OfReal sampling_parameters(1,a_sampler.NbPoints()) ;
597 for (ii = 1 ; ii <= a_sampler.NbPoints() ; ii++) {
598 sampling_parameters(ii) = a_sampler.Parameter(ii) ;
599 }
600 if (a_sampler.NbPoints() < min_sampling_points) {
601 GeomLib::DensifyArray1OfReal(min_sampling_points,
602 sampling_parameters,
603 parameters_ptr) ;
604 }
605 else if (a_sampler.NbPoints() > max_sampling_points) {
606 GeomLib::RemovePointsFromArray(max_sampling_points,
607 sampling_parameters,
608 parameters_ptr) ;
609 }
610 else {
611 jj = 1 ;
612 parameters_ptr =
613 new TColStd_HArray1OfReal(1,sampling_parameters.Length()) ;
614 for (ii = sampling_parameters.Lower() ; ii <= sampling_parameters.Upper() ; ii++) {
615 parameters_ptr->ChangeArray1()(jj) =
616 sampling_parameters(ii) ;
617 jj +=1 ;
7fd59977 618 }
a86d3ec0 619 }
620
621 curve_index = 0 ;
622
623 while (second_iterator.More()) {
624 geometric_representation_ptr =
625 Handle(BRep_GCurve)::DownCast(second_iterator.Value());
626 if (! geometric_representation_ptr.IsNull() &&
627 curve_index != curve_on_surface_index) {
628 has_closed_curve =
629 has_curve = Standard_False ;
630 // first = geometric_representation_ptr->First();
631 // last = geometric_representation_ptr->Last();
632 local_location = geometric_representation_ptr->Location() ;
633 if (geometric_representation_ptr->IsCurveOnSurface()) {
634 curve2d_ptr = geometric_representation_ptr->PCurve() ;
635 has_curve = Standard_True ;
636 }
637 if (geometric_representation_ptr->IsCurveOnClosedSurface()) {
638 curve2d_ptr = geometric_representation_ptr->PCurve2() ;
639 has_closed_curve = Standard_True ;
640 }
641
642 if (has_curve ||
643 has_closed_curve) {
644 if (! local_location.IsIdentity() ) {
645 surface_ptr = Handle(Geom_Surface)::
646 DownCast( geometric_representation_ptr->Surface()->
647 Transformed(local_location.Transformation()) ) ;
648 }
649 else {
650 surface_ptr =
651 geometric_representation_ptr->Surface() ;
652 }
653 Geom2dAdaptor_Curve an_adaptor_curve2d (curve2d_ptr) ;
654 GeomAdaptor_Surface an_adaptor_surface(surface_ptr) ;
655 Handle(Geom2dAdaptor_HCurve) an_adaptor_curve2d_ptr =
656 new Geom2dAdaptor_HCurve(an_adaptor_curve2d) ;
657 Handle(GeomAdaptor_HSurface) an_adaptor_surface_ptr =
658 new GeomAdaptor_HSurface (an_adaptor_surface) ;
659 Adaptor3d_CurveOnSurface a_curve_on_surface(an_adaptor_curve2d_ptr,
660 an_adaptor_surface_ptr) ;
661
662 if (BRep_Tool::SameParameter(AnEdge)) {
663
664 GeomLib::EvalMaxParametricDistance(a_curve_on_surface,
665 geom_reference_curve,
666 MinToleranceRequested,
667 parameters_ptr->Array1(),
668 max_distance) ;
669 }
670 else if (geom_reference_curve_flag) {
671 GeomLib::EvalMaxDistanceAlongParameter(a_curve_on_surface,
672 geom_reference_curve,
673 MinToleranceRequested,
674 parameters_ptr->Array1(),
675 max_distance) ;
676 }
677 else {
678
679 GeomLib::EvalMaxDistanceAlongParameter(a_curve_on_surface,
680 curve_on_surface_reference,
681 MinToleranceRequested,
682 parameters_ptr->Array1(),
683 max_distance) ;
684 }
685 max_distance *= safe_factor ;
686 edge_tolerance = Max(max_distance, edge_tolerance) ;
687 }
7fd59977 688
7fd59977 689
7fd59977 690 }
a86d3ec0 691 curve_index += 1 ;
692 second_iterator.Next() ;
7fd59977 693 }
a86d3ec0 694
695 TE->Tolerance(edge_tolerance);
696 return Standard_True ;
697
698}
7fd59977 699//=======================================================================
700//function : UpdateEdgeTolerance
701//purpose :
702//=======================================================================
703
704Standard_Boolean BRepLib::UpdateEdgeTolerance(const TopoDS_Shape& S,
a86d3ec0 705 const Standard_Real MinToleranceRequested,
706 const Standard_Real MaxToleranceToCheck)
7fd59977 707{
708 TopExp_Explorer ex(S,TopAbs_EDGE);
709 TopTools_MapOfShape a_counter ;
710
711 Standard_Boolean return_status = Standard_False,
712 local_flag ;
713
714 while (ex.More()) {
715 if (a_counter.Add(ex.Current())) {
716 local_flag =
a86d3ec0 717 BRepLib::UpdateEdgeTol(TopoDS::Edge(ex.Current()),
718 MinToleranceRequested,
719 MaxToleranceToCheck) ;
7fd59977 720 if (local_flag && ! return_status) {
a86d3ec0 721 return_status = Standard_True ;
7fd59977 722 }
723 }
724 ex.Next();
725 }
726 return return_status ;
727}
728
729//=======================================================================
730//function : SetEdgeTol
731//purpose :
732//=======================================================================
733
734static void SetEdgeTol(const TopoDS_Edge& E,
a86d3ec0 735 const TopoDS_Face& F)
7fd59977 736{
737 TopLoc_Location L;
738 const Handle(Geom_Surface)& S = BRep_Tool::Surface(F,L);
739 TopLoc_Location l = L.Predivided(E.Location());
740
741 const Handle(BRep_TEdge)& TE = *((Handle(BRep_TEdge)*)&E.TShape());
742 BRep_ListIteratorOfListOfCurveRepresentation itcr(TE->ChangeCurves());
743
744 while (itcr.More()) {
745 const Handle(BRep_CurveRepresentation)& cr = itcr.Value();
746 if(cr->IsCurveOnSurface(S,l)) return;
747 itcr.Next();
748 }
749
750 Handle(Geom_Plane) GP;
751 Handle(Geom_RectangularTrimmedSurface) GRTS;
752 GRTS = Handle(Geom_RectangularTrimmedSurface)::DownCast(S);
753 if(!GRTS.IsNull())
754 GP = Handle(Geom_Plane)::DownCast(GRTS->BasisSurface());
755 else
756 GP = Handle(Geom_Plane)::DownCast(S);
757
41194117
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758 Handle(GeomAdaptor_HCurve) HC = new GeomAdaptor_HCurve();
759 Handle(GeomAdaptor_HSurface) HS = new GeomAdaptor_HSurface();
a86d3ec0 760
7fd59977 761 TopLoc_Location LC;
762 Standard_Real First, Last;
763 GeomAdaptor_Curve& GAC = HC->ChangeCurve();
764 GAC.Load(BRep_Tool::Curve(E,LC,First,Last));
765 LC = L.Predivided(LC);
766
767 if (!LC.IsIdentity()) {
768 GP = Handle(Geom_Plane)::DownCast(
a86d3ec0 769 GP->Transformed(LC.Transformation()));
7fd59977 770 }
771 GeomAdaptor_Surface& GAS = HS->ChangeSurface();
772 GAS.Load(GP);
a86d3ec0 773
7fd59977 774 ProjLib_ProjectedCurve Proj(HS,HC);
775 Handle(Geom2d_Curve) pc = Geom2dAdaptor::MakeCurve(Proj);
776
777 gp_Pln pln = GAS.Plane();
778 Standard_Real d2 = 0.;
779 Standard_Integer nn = 23;
780 Standard_Real unsurnn = 1./nn;
781 for(Standard_Integer i = 0; i <= nn; i++){
782 Standard_Real t = unsurnn*i;
783 Standard_Real u = First*(1.-t) + Last*t;
784 gp_Pnt Pc3d = HC->Value(u);
785 gp_Pnt2d p2d = pc->Value(u);
786 gp_Pnt Pcons = ElSLib::Value(p2d.X(),p2d.Y(),pln);
873c119f 787 Standard_Real eps = Max(Pc3d.XYZ().SquareModulus(), Pcons.XYZ().SquareModulus());
788 eps = Epsilon(eps);
7fd59977 789 Standard_Real temp = Pc3d.SquareDistance(Pcons);
873c119f 790 if(temp <= eps)
791 {
792 temp = 0.;
793 }
7fd59977 794 if(temp > d2) d2 = temp;
795 }
796 d2 = 1.5*sqrt(d2);
797 TE->UpdateTolerance(d2);
798}
799
800//=======================================================================
801//function : SameParameter
802//purpose :
803//=======================================================================
804void BRepLib::SameParameter(const TopoDS_Shape& S,
a86d3ec0 805 const Standard_Real Tolerance,
806 const Standard_Boolean forced)
7fd59977 807{
808 TopExp_Explorer ex(S,TopAbs_EDGE);
809 TopTools_MapOfShape Done;
810 BRep_Builder brB;
811
812 while (ex.More()) {
813 if (Done.Add(ex.Current())) {
814 if (forced) {
a86d3ec0 815 brB.SameRange(TopoDS::Edge(ex.Current()), Standard_False);
816 brB.SameParameter(TopoDS::Edge(ex.Current()), Standard_False);
7fd59977 817 }
818 BRepLib::SameParameter(TopoDS::Edge(ex.Current()),Tolerance);
819 }
820 ex.Next();
821 }
822
823 Done.Clear();
824 BRepAdaptor_Surface BS;
825 for(ex.Init(S,TopAbs_FACE); ex.More(); ex.Next()){
826 const TopoDS_Face& curface = TopoDS::Face(ex.Current());
827 if(!Done.Add(curface)) continue;
828 BS.Initialize(curface);
829 if(BS.GetType() != GeomAbs_Plane) continue;
830 TopExp_Explorer ex2;
831 for(ex2.Init(curface,TopAbs_EDGE); ex2.More(); ex2.Next()){
832 const TopoDS_Edge& E = TopoDS::Edge(ex2.Current());
833 SetEdgeTol(E,curface);
834 }
835 }
836 BRepLib::UpdateTolerances(S);
837}
838
0d969553 839//================================================================
7fd59977 840//function : SameParameter
0d969553
Y
841//WARNING : New spec DUB LBO 9/9/97.
842// Recode in the edge the best tolerance found,
843// for vertex extremities it is required to find something else
844//================================================================
7fd59977 845static Standard_Boolean EvalTol(const Handle(Geom2d_Curve)& pc,
a86d3ec0 846 const Handle(Geom_Surface)& s,
847 const GeomAdaptor_Curve& gac,
848 const Standard_Real tol,
849 Standard_Real& tolbail)
7fd59977 850{
851 Standard_Integer ok = 0;
852 Standard_Real f = gac.FirstParameter();
853 Standard_Real l = gac.LastParameter();
854 Extrema_LocateExtPC Projector;
855 Projector.Initialize(gac,f,l,tol);
856 Standard_Real u,v;
857 gp_Pnt p;
858 tolbail = tol;
859 for(Standard_Integer i = 1; i <= 5; i++){
860 Standard_Real t = i/6.;
861 t = (1.-t) * f + t * l;
862 pc->Value(t).Coord(u,v);
863 p = s->Value(u,v);
864 Projector.Perform(p,t);
865 if (Projector.IsDone()) {
866 Standard_Real dist2 = Projector.SquareDistance();
867 if(dist2 > tolbail * tolbail) tolbail = sqrt (dist2);
868 ok++;
869 }
870 }
871 return (ok > 2);
872}
873
874static Standard_Real ComputeTol(const Handle(Adaptor3d_HCurve)& c3d,
a86d3ec0 875 const Handle(Adaptor2d_HCurve2d)& c2d,
876 const Handle(Adaptor3d_HSurface)& surf,
877 const Standard_Integer nbp)
7fd59977 878
879{
880
881 TColStd_Array1OfReal dist(1,nbp+10);
882 dist.Init(-1.);
883
7fd59977 884 Adaptor3d_CurveOnSurface cons(c2d,surf);
885 Standard_Real d2 = 0.;
7fd59977 886 Standard_Real first = c3d->FirstParameter();
887 Standard_Real last = c3d->LastParameter();
888 Standard_Integer i = 0;
a86d3ec0 889 for(i = 0; i <= nbp; i++){
890 const Standard_Real t = IntToReal(i)/IntToReal(nbp);
891 const Standard_Real u = first*(1.-t) + last*t;
7fd59977 892 gp_Pnt Pc3d = c3d->Value(u);
893 gp_Pnt Pcons = cons.Value(u);
894 if (Precision::IsInfinite(Pcons.X()) ||
a86d3ec0 895 Precision::IsInfinite(Pcons.Y()) ||
896 Precision::IsInfinite(Pcons.Z())) {
897 d2=Precision::Infinite();
898 break;
7fd59977 899 }
900 Standard_Real temp = Pc3d.SquareDistance(Pcons);
901
902
903 dist(i+1) = temp;
904
905
906 if(temp > d2) d2 = temp;
907 }
908
909
910 Standard_Boolean ana = Standard_False;
911 Standard_Real D2 = 0;
912 Standard_Integer N1 = 0;
913 Standard_Integer N2 = 0;
914 Standard_Integer N3 = 0;
915
916 for( i = 1; i<= nbp+10; i++)
917 if( dist(i) > 0 ) {
918 if( dist(i) < 1.0 ) N1++;
919 else N2++;
920 }
921
a86d3ec0 922 if( N1 > N2 && N2 != 0 ) N3 = 100*N2/(N1+N2);
923 if( N3 < 10 && N3 != 0 ) {
924 ana = Standard_True;
925 for( i = 1; i<= nbp+10; i++)
926 if( dist(i) > 0 && dist(i) < 1.0 )
927 if( dist(i) > D2 ) D2 = dist(i);
928 }
7fd59977 929
a86d3ec0 930 //d2 = 1.5*sqrt(d2);
931 d2 = (!ana) ? 1.5*sqrt(d2) : 1.5*sqrt(D2);
932 if(d2<1.e-7) d2 = 1.e-7;
7fd59977 933
a86d3ec0 934 return d2;
7fd59977 935}
936
7fd59977 937void BRepLib::SameParameter(const TopoDS_Edge& AnEdge,
a86d3ec0 938 const Standard_Real Tolerance)
7fd59977 939{
940 if (BRep_Tool::SameParameter(AnEdge)) return;
941
942 const Standard_Integer NCONTROL = 22;
943
41194117
K
944 Handle(GeomAdaptor_HCurve) HC = new GeomAdaptor_HCurve();
945 Handle(Geom2dAdaptor_HCurve) HC2d = new Geom2dAdaptor_HCurve();
946 Handle(GeomAdaptor_HSurface) HS = new GeomAdaptor_HSurface();
7fd59977 947 GeomAdaptor_Curve& GAC = HC->ChangeCurve();
948 Geom2dAdaptor_Curve& GAC2d = HC2d->ChangeCurve2d();
949 GeomAdaptor_Surface& GAS = HS->ChangeSurface();
7fd59977 950 Standard_Real f3d =0.,l3d =0.;
7fd59977 951 TopLoc_Location L3d;
952 Handle(Geom_Curve) C3d;
953
954 const Handle(BRep_TEdge)& TE = *((Handle(BRep_TEdge)*) &AnEdge.TShape());
955 BRep_ListOfCurveRepresentation& CList = TE->ChangeCurves();
956 BRep_ListIteratorOfListOfCurveRepresentation It(CList);
a86d3ec0 957
7fd59977 958 Standard_Boolean NotDone = Standard_True;
959
960 while (NotDone && It.More()) {
961 Handle(BRep_GCurve) GCurve = Handle(BRep_GCurve)::DownCast(It.Value());
962 if (!GCurve.IsNull() && GCurve->IsCurve3D()) {
963 C3d = GCurve->Curve3D() ;
964 f3d = GCurve->First();
965 l3d = GCurve->Last();
966 L3d = GCurve->Location() ;
967 NotDone = Standard_False;
968 }
969 It.Next() ;
970 }
971
972 if(C3d.IsNull()) return;
973
974 // modified by NIZHNY-OCC486 Tue Aug 27 17:15:13 2002 :
975 Standard_Boolean m_TrimmedPeriodical = Standard_False;
976 Handle(Standard_Type) TheType = C3d->DynamicType();
977 if( TheType == STANDARD_TYPE(Geom_TrimmedCurve))
a86d3ec0 978 {
c5f3a425 979 Handle(Geom_Curve) gtC (Handle(Geom_TrimmedCurve)::DownCast (C3d)->BasisCurve());
a86d3ec0 980 m_TrimmedPeriodical = gtC->IsPeriodic();
981 }
7fd59977 982 // modified by NIZHNY-OCC486 Tue Aug 27 17:15:17 2002 .
983
984 BRep_Builder B;
985 if(!C3d->IsPeriodic()) {
986 Standard_Real Udeb = C3d->FirstParameter();
987 Standard_Real Ufin = C3d->LastParameter();
988 // modified by NIZHNY-OCC486 Tue Aug 27 17:17:14 2002 :
989 //if (Udeb > f3d) f3d = Udeb;
990 //if (l3d > Ufin) l3d = Ufin;
991 if(!m_TrimmedPeriodical)
a86d3ec0 992 {
993 if (Udeb > f3d) f3d = Udeb;
994 if (l3d > Ufin) l3d = Ufin;
995 }
7fd59977 996 // modified by NIZHNY-OCC486 Tue Aug 27 17:17:55 2002 .
997 }
998 if(!L3d.IsIdentity()){
999 C3d = Handle(Geom_Curve)::DownCast(C3d->Transformed(L3d.Transformation()));
1000 }
1001 GAC.Load(C3d,f3d,l3d);
1002
1003 Standard_Boolean IsSameP = 1;
1004 Standard_Real maxdist = 0.;
1005
a86d3ec0 1006 // Modified by skv - Thu Jun 3 12:39:19 2004 OCC5898 Begin
7fd59977 1007 Standard_Real anEdgeTol = BRep_Tool::Tolerance(AnEdge);
a86d3ec0 1008 // Modified by skv - Thu Jun 3 12:39:20 2004 OCC5898 End
7fd59977 1009 Standard_Boolean SameRange = BRep_Tool::SameRange(AnEdge);
1010 Standard_Boolean YaPCu = Standard_False;
1011 It.Initialize(CList);
1012
1013 while (It.More()) {
1014 Standard_Boolean isANA = Standard_False;
1015 Standard_Boolean isBSP = Standard_False;
1016 Handle(BRep_GCurve) GCurve = Handle(BRep_GCurve)::DownCast(It.Value());
1017 Handle(Geom2d_Curve) PC[2];
1018 Handle(Geom_Surface) S;
1019 if (!GCurve.IsNull() && GCurve->IsCurveOnSurface()) {
1020 YaPCu = Standard_True;
1021 PC[0] = GCurve->PCurve();
1022 TopLoc_Location PCLoc = GCurve->Location();
1023 S = GCurve->Surface();
1024 if (!PCLoc.IsIdentity() ) {
a86d3ec0 1025 S = Handle(Geom_Surface)::DownCast(S->Transformed(PCLoc.Transformation()));
7fd59977 1026 }
a86d3ec0 1027
7fd59977 1028 GAS.Load(S);
1029 if (GCurve->IsCurveOnClosedSurface()) {
a86d3ec0 1030 PC[1] = GCurve->PCurve2();
7fd59977 1031 }
a86d3ec0 1032
7fd59977 1033 // Eval tol2d to compute SameRange
973f1c39 1034 Standard_Real UResol = Max(GAS.UResolution(Tolerance), Precision::PConfusion());
1035 Standard_Real VResol = Max(GAS.VResolution(Tolerance), Precision::PConfusion());
7fd59977 1036 Standard_Real Tol2d = Min(UResol, VResol);
1037 for(Standard_Integer i = 0; i < 2; i++){
a86d3ec0 1038 Handle(Geom2d_Curve) curPC = PC[i];
1039 Standard_Boolean updatepc = 0;
1040 if(curPC.IsNull()) break;
1041 if(!SameRange){
1042 GeomLib::SameRange(Tol2d,
1043 PC[i],GCurve->First(),GCurve->Last(),
1044 f3d,l3d,curPC);
1045
1046 updatepc = (curPC != PC[i]);
1047
1048 }
1049 Standard_Boolean goodpc = 1;
1050 GAC2d.Load(curPC,f3d,l3d);
1051
1052 Standard_Real error = ComputeTol(HC, HC2d, HS, NCONTROL);
1053
1054 if(GAC2d.GetType() == GeomAbs_BSplineCurve &&
1055 GAC2d.Continuity() == GeomAbs_C0) {
1056 Handle(Geom2d_BSplineCurve) bs2d = GAC2d.BSpline();
1057 Handle(Geom2d_BSplineCurve) bs2dsov = bs2d;
1058 Standard_Real fC0 = bs2d->FirstParameter(), lC0 = bs2d->LastParameter();
1059 Standard_Boolean repar = Standard_True;
1060 gp_Pnt2d OriginPoint;
1061 bs2d->D0(fC0, OriginPoint);
1062 Geom2dConvert::C0BSplineToC1BSplineCurve(bs2d, Tol2d);
1063 isBSP = Standard_True;
1064
1065 if(bs2d->IsPeriodic()) { // -------- IFV, Jan 2000
1066 gp_Pnt2d NewOriginPoint;
1067 bs2d->D0(bs2d->FirstParameter(), NewOriginPoint);
1068 if(Abs(OriginPoint.X() - NewOriginPoint.X()) > Precision::PConfusion() ||
1069 Abs(OriginPoint.Y() - NewOriginPoint.Y()) > Precision::PConfusion() ) {
1070
1071 TColStd_Array1OfReal Knotbs2d (1, bs2d->NbKnots());
1072 bs2d->Knots(Knotbs2d);
1073
1074 for(Standard_Integer Index = 1; Index <= bs2d->NbKnots(); Index++) {
1075 bs2d->D0(Knotbs2d(Index), NewOriginPoint);
1076 if(Abs(OriginPoint.X() - NewOriginPoint.X()) > Precision::PConfusion() ||
1077 Abs(OriginPoint.Y() - NewOriginPoint.Y()) > Precision::PConfusion() ) continue;
1078
1079 bs2d->SetOrigin(Index);
1080 break;
1081 }
1082 }
1083 }
1084
1085 if(bs2d->Continuity() == GeomAbs_C0) {
1086 Standard_Real tolbail;
1087 if(EvalTol(curPC,S,GAC,Tolerance,tolbail)){
1088 bs2d = bs2dsov;
1089 Standard_Real UResbail = GAS.UResolution(tolbail);
1090 Standard_Real VResbail = GAS.VResolution(tolbail);
1091 Standard_Real Tol2dbail = Min(UResbail,VResbail);
1092 bs2d->D0(bs2d->FirstParameter(), OriginPoint);
1093
1094 Standard_Integer nbp = bs2d->NbPoles();
1095 TColgp_Array1OfPnt2d poles(1,nbp);
1096 bs2d->Poles(poles);
1097 gp_Pnt2d p = poles(1), p1;
1098 Standard_Real d = Precision::Infinite();
1099 for(Standard_Integer ip = 2; ip <= nbp; ip++) {
1100 p1 = poles(ip);
1101 d = Min(d,p.SquareDistance(p1));
1102 p = p1;
1103 }
1104 d = sqrt(d)*.1;
1105
1106 Tol2dbail = Max(Min(Tol2dbail,d),Tol2d);
1107
1108 Geom2dConvert::C0BSplineToC1BSplineCurve(bs2d,Tol2dbail);
1109
1110 if(bs2d->IsPeriodic()) { // -------- IFV, Jan 2000
1111 gp_Pnt2d NewOriginPoint;
1112 bs2d->D0(bs2d->FirstParameter(), NewOriginPoint);
1113 if(Abs(OriginPoint.X() - NewOriginPoint.X()) > Precision::PConfusion() ||
1114 Abs(OriginPoint.Y() - NewOriginPoint.Y()) > Precision::PConfusion() ) {
1115
1116 TColStd_Array1OfReal Knotbs2d (1, bs2d->NbKnots());
1117 bs2d->Knots(Knotbs2d);
1118
1119 for(Standard_Integer Index = 1; Index <= bs2d->NbKnots(); Index++) {
1120 bs2d->D0(Knotbs2d(Index), NewOriginPoint);
1121 if(Abs(OriginPoint.X() - NewOriginPoint.X()) > Precision::PConfusion() ||
1122 Abs(OriginPoint.Y() - NewOriginPoint.Y()) > Precision::PConfusion() ) continue;
1123
1124 bs2d->SetOrigin(Index);
1125 break;
1126 }
1127 }
1128 }
1129
1130
1131 if(bs2d->Continuity() == GeomAbs_C0) {
1132 goodpc = 1;
1133 bs2d = bs2dsov;
1134 repar = Standard_False;
1135 }
1136 }
1137 else goodpc = 0;
1138 }
1139
1140 if(goodpc){
1141 if(repar) {
1142 Standard_Integer NbKnots = bs2d->NbKnots();
1143 TColStd_Array1OfReal Knots(1,NbKnots);
1144 bs2d->Knots(Knots);
1145 // BSplCLib::Reparametrize(f3d,l3d,Knots);
1146 BSplCLib::Reparametrize(fC0,lC0,Knots);
1147 bs2d->SetKnots(Knots);
1148 GAC2d.Load(bs2d,f3d,l3d);
1149 curPC = bs2d;
1150 Standard_Boolean updatepcsov = updatepc;
1151 updatepc = Standard_True;
1152
1153 Standard_Real error1 = ComputeTol(HC, HC2d, HS, NCONTROL);
1154 if(error1 > error) {
1155 bs2d = bs2dsov;
1156 GAC2d.Load(bs2d,f3d,l3d);
1157 curPC = bs2d;
1158 updatepc = updatepcsov;
1159 isANA = Standard_True;
1160 }
1161 else {
1162 error = error1;
1163 }
1164 }
1165
1166 //check, if new BSpline "good" or not --------- IFV, Jan of 2000
1167 GeomAbs_Shape cont = bs2d->Continuity();
1168 Standard_Boolean IsBad = Standard_False;
1169
1170 if(cont > GeomAbs_C0 && error > Max(1.e-3,Tolerance)) {
1171 Standard_Integer NbKnots = bs2d->NbKnots();
1172 TColStd_Array1OfReal Knots(1,NbKnots);
1173 bs2d->Knots(Knots);
1174 Standard_Real critratio = 10.;
1175 Standard_Real dtprev = Knots(2) - Knots(1), dtratio = 1.;
1176 Standard_Real dtmin = dtprev;
1177 Standard_Real dtcur;
1178 for(Standard_Integer j = 2; j < NbKnots; j++) {
1179 dtcur = Knots(j+1) - Knots(j);
1180 dtmin = Min(dtmin, dtcur);
1181
1182 if(IsBad) continue;
1183
1184 if(dtcur > dtprev) dtratio = dtcur/dtprev;
1185 else dtratio = dtprev/dtcur;
1186 if(dtratio > critratio) {IsBad = Standard_True;}
1187 dtprev = dtcur;
1188
1189 }
1190 if(IsBad) {
1191 // To avoid failures in Approx_CurvilinearParameter
1192 bs2d->Resolution(Max(1.e-3,Tolerance), dtcur);
1193 if(dtmin < dtcur) IsBad = Standard_False;
1194 }
1195 }
1196
1197
1198 if(IsBad ) { //if BSpline "bad", try to reparametrize it
1199 // by its curve length
1200
1201 // GeomAbs_Shape cont = bs2d->Continuity();
1202 if(cont > GeomAbs_C2) cont = GeomAbs_C2;
1203 Standard_Integer maxdeg = bs2d->Degree();
1204 if(maxdeg == 1) maxdeg = 14;
1205 Approx_CurvilinearParameter AppCurPar(HC2d, HS, Max(1.e-3,Tolerance),
1206 cont, maxdeg, 10);
1207 if(AppCurPar.IsDone() || AppCurPar.HasResult()) {
1208 bs2d = AppCurPar.Curve2d1();
1209 GAC2d.Load(bs2d,f3d,l3d);
1210 curPC = bs2d;
1211
1212 if(Abs(bs2d->FirstParameter() - fC0) > Tol2d ||
1213 Abs(bs2d->LastParameter() - lC0) > Tol2d ) {
1214 Standard_Integer NbKnots = bs2d->NbKnots();
1215 TColStd_Array1OfReal Knots(1,NbKnots);
1216 bs2d->Knots(Knots);
1217 // BSplCLib::Reparametrize(f3d,l3d,Knots);
1218 BSplCLib::Reparametrize(fC0,lC0,Knots);
1219 bs2d->SetKnots(Knots);
1220 GAC2d.Load(bs2d,f3d,l3d);
1221 curPC = bs2d;
1222
1223 }
1224 }
1225 }
1226
1227
1228 }
1229 }
1230
1231
1232 if(goodpc){
1233 // Approx_SameParameter SameP(HC,HC2d,HS,Tolerance);
1234 Standard_Real aTol = (isANA && isBSP) ? 1.e-7 : Tolerance;
1235 Approx_SameParameter SameP(HC,HC2d,HS,aTol);
1236
1237 if (SameP.IsSameParameter()) {
1238 maxdist = Max(maxdist,SameP.TolReached());
1239 if(updatepc){
1240 if (i == 0) GCurve->PCurve(curPC);
1241 else GCurve->PCurve2(curPC);
1242 }
1243 }
1244 else if (SameP.IsDone()) {
1245 Standard_Real tolreached = SameP.TolReached();
1246 if(tolreached < error) {
1247 curPC = SameP.Curve2d();
1248 updatepc = Standard_True;
1249 maxdist = Max(maxdist,tolreached);
1250 }
1251 else {
1252 maxdist = Max(maxdist, error);
1253 }
1254 if(updatepc){
1255 if (i == 0) GCurve->PCurve(curPC);
1256 else GCurve->PCurve2(curPC);
1257 }
1258 }
1259 else IsSameP = 0;
1260
1261 }
1262 else IsSameP = 0;
1263
1264 // Modified by skv - Thu Jun 3 12:39:19 2004 OCC5898 Begin
1265 if (!IsSameP) {
1266 if (anEdgeTol > error) {
1267 maxdist = Max(maxdist, anEdgeTol);
1268 IsSameP = Standard_True;
1269 }
1270 }
1271 // Modified by skv - Thu Jun 3 12:39:20 2004 OCC5898 End
7fd59977 1272 }
1273 }
1274 It.Next() ;
1275 }
1276 B.Range(AnEdge,f3d,l3d);
1277 B.SameRange(AnEdge,Standard_True);
1278 if ( IsSameP) {
0d969553
Y
1279 // Reduce eventually the tolerance of the edge, as
1280 // all its representations are processed (except for some associated
1281 // to planes and not stored in the edge !)
1282 // The same cannot be done with vertices that cannot be enlarged
1283 // or left as is.
7fd59977 1284 if (YaPCu) {
0d969553 1285 // Avoid setting too small tolerances.
7fd59977 1286 maxdist = Max(maxdist,Precision::Confusion());
1287 TopoDS_Vertex V1,V2;
1288 TopExp::Vertices(AnEdge,V1,V2);
1289 if (!V1.IsNull())
a86d3ec0 1290 B.UpdateVertex(V1,maxdist);
7fd59977 1291 if (!V2.IsNull())
a86d3ec0 1292 B.UpdateVertex(V2,maxdist);
7fd59977 1293 TE->Modified(Standard_True);
1294 TE->Tolerance(maxdist);
1295 }
1296 B.SameParameter(AnEdge,Standard_True);
1297 }
1298}
1299
1300//=======================================================================
1301//function : UpdateTolerances
1302//purpose :
1303//=======================================================================
1304void BRepLib::UpdateTolerances(const TopoDS_Shape& aShape,
a86d3ec0 1305 const Standard_Boolean verifyTolerance)
7fd59977 1306{
1307
a86d3ec0 1308 // Harmonize tolerances
1309 // with rule Tolerance(VERTEX)>=Tolerance(EDGE)>=Tolerance(FACE)
7fd59977 1310 BRep_Builder B;
1311 Standard_Real tol=0;
1312 if (verifyTolerance) {
0d969553 1313 // Set tolerance to its minimum value
7fd59977 1314 Handle(Geom_Surface) S;
1315 TopLoc_Location l;
1316 TopExp_Explorer ex;
1317 Bnd_Box aB;
1318 Standard_Real aXmin, aYmin, aZmin, aXmax, aYmax, aZmax, dMax;
1319 for (ex.Init(aShape, TopAbs_FACE); ex.More(); ex.Next()) {
1320 const TopoDS_Face& curf=TopoDS::Face(ex.Current());
1321 S = BRep_Tool::Surface(curf, l);
1322 if (!S.IsNull()) {
a86d3ec0 1323 aB.SetVoid();
1324 BRepBndLib::Add(curf,aB);
1325 if (S->DynamicType() == STANDARD_TYPE(Geom_RectangularTrimmedSurface)) {
c5f3a425 1326 S = Handle(Geom_RectangularTrimmedSurface)::DownCast (S)->BasisSurface();
a86d3ec0 1327 }
1328 GeomAdaptor_Surface AS(S);
1329 switch (AS.GetType()) {
1330 case GeomAbs_Plane:
1331 case GeomAbs_Cylinder:
1332 case GeomAbs_Cone:
1333 {
1334 tol=Precision::Confusion();
1335 break;
1336 }
1337 case GeomAbs_Sphere:
1338 case GeomAbs_Torus:
1339 {
1340 tol=Precision::Confusion()*2;
1341 break;
1342 }
1343 default:
1344 tol=Precision::Confusion()*4;
1345 }
1346 if (!aB.IsWhole()) {
1347 aB.Get(aXmin, aYmin, aZmin, aXmax, aYmax, aZmax);
1348 dMax=1.;
1349 if (!aB.IsOpenXmin() && !aB.IsOpenXmax()) dMax=aXmax-aXmin;
1350 if (!aB.IsOpenYmin() && !aB.IsOpenYmax()) aYmin=aYmax-aYmin;
1351 if (!aB.IsOpenZmin() && !aB.IsOpenZmax()) aZmin=aZmax-aZmin;
1352 if (aYmin>dMax) dMax=aYmin;
1353 if (aZmin>dMax) dMax=aZmin;
1354 tol=tol*dMax;
1355 // Do not process tolerances > 1.
1356 if (tol>1.) tol=0.99;
1357 }
1358 const Handle(BRep_TFace)& Tf = *((Handle(BRep_TFace)*)&curf.TShape());
1359 Tf->Tolerance(tol);
7fd59977 1360 }
1361 }
1362 }
a86d3ec0 1363
0d969553 1364 //Process edges
7fd59977 1365 TopTools_IndexedDataMapOfShapeListOfShape parents;
1366 TopExp::MapShapesAndAncestors(aShape, TopAbs_EDGE, TopAbs_FACE, parents);
1367 TopTools_ListIteratorOfListOfShape lConx;
1368 Standard_Integer iCur;
1369 for (iCur=1; iCur<=parents.Extent(); iCur++) {
1370 tol=0;
1371 for (lConx.Initialize(parents(iCur)); lConx.More(); lConx.Next()) {
1372 tol=Max(tol, BRep_Tool::Tolerance(TopoDS::Face(lConx.Value())));
1373 }
0d969553
Y
1374 // Update can only increase tolerance, so if the edge has a greater
1375 // tolerance than its faces it is not concerned
7fd59977 1376 B.UpdateEdge(TopoDS::Edge(parents.FindKey(iCur)), tol);
1377 }
1378
0d969553 1379 //Vertices are processed
7fd59977 1380 parents.Clear();
1381 TopExp::MapShapesAndAncestors(aShape, TopAbs_VERTEX, TopAbs_EDGE, parents);
1382 TColStd_MapOfTransient Initialized;
1383 TopTools_MapOfShape Done;
1384 Standard_Integer nbV = parents.Extent();
1385 for (iCur=1; iCur<=nbV; iCur++) {
1386 tol=0;
1387 Done.Clear();
1388 const TopoDS_Vertex& V = TopoDS::Vertex(parents.FindKey(iCur));
1389 Bnd_Box box;
1390 box.Add(BRep_Tool::Pnt(V));
1391 gp_Pnt p3d;
1392 for (lConx.Initialize(parents(iCur)); lConx.More(); lConx.Next()) {
1393 const TopoDS_Edge& E = TopoDS::Edge(lConx.Value());
1394 if(!Done.Add(E)) continue;
1395 tol=Max(tol, BRep_Tool::Tolerance(E));
1396 if(!BRep_Tool::SameRange(E)) continue;
1397 Standard_Real par = BRep_Tool::Parameter(V,E);
1398 Handle(BRep_TEdge)& TE = *((Handle(BRep_TEdge)*)&E.TShape());
1399 BRep_ListIteratorOfListOfCurveRepresentation itcr(TE->Curves());
1400 const TopLoc_Location& Eloc = E.Location();
1401 while (itcr.More()) {
a86d3ec0 1402 // For each CurveRepresentation, check the provided parameter
1403 const Handle(BRep_CurveRepresentation)& cr = itcr.Value();
1404 const TopLoc_Location& loc = cr->Location();
1405 TopLoc_Location L = (Eloc * loc);
1406 if (cr->IsCurve3D()) {
1407 const Handle(Geom_Curve)& C = cr->Curve3D();
1408 if (!C.IsNull()) { // edge non degenerated
1409 p3d = C->Value(par);
1410 p3d.Transform(L.Transformation());
1411 box.Add(p3d);
1412 }
1413 }
1414 else if (cr->IsCurveOnSurface()) {
1415 const Handle(Geom_Surface)& Su = cr->Surface();
1416 const Handle(Geom2d_Curve)& PC = cr->PCurve();
1417 Handle(Geom2d_Curve) PC2;
1418 if (cr->IsCurveOnClosedSurface()) {
1419 PC2 = cr->PCurve2();
1420 }
1421 gp_Pnt2d p2d = PC->Value(par);
1422 p3d = Su->Value(p2d.X(),p2d.Y());
1423 p3d.Transform(L.Transformation());
1424 box.Add(p3d);
1425 if (!PC2.IsNull()) {
1426 p2d = PC2->Value(par);
1427 p3d = Su->Value(p2d.X(),p2d.Y());
1428 p3d.Transform(L.Transformation());
1429 box.Add(p3d);
1430 }
1431 }
1432 itcr.Next();
7fd59977 1433 }
1434 }
1435 Standard_Real aXmin, aYmin, aZmin, aXmax, aYmax, aZmax;
1436 box.Get(aXmin, aYmin, aZmin, aXmax, aYmax, aZmax);
1437 aXmax -= aXmin; aYmax -= aYmin; aZmax -= aZmin;
1438 tol = Max(tol,sqrt(aXmax*aXmax+aYmax*aYmax+aZmax*aZmax));
1439 tol += 2.*Epsilon(tol);
1440 if (verifyTolerance) {
0d969553
Y
1441 // ASet minimum value of the tolerance
1442 // Attention to sharing of the vertex by other shapes
7fd59977 1443 const Handle(BRep_TVertex)& TV = *((Handle(BRep_TVertex)*)&V.TShape());
1444 if (Initialized.Add(TV))
a86d3ec0 1445 TV->Tolerance(tol);
7fd59977 1446 else
a86d3ec0 1447 B.UpdateVertex(V, tol);
7fd59977 1448 }
1449 else {
a86d3ec0 1450 // Update can only increase tolerance, so if the edge has a greater
1451 // tolerance than its faces it is not concerned
7fd59977 1452 B.UpdateVertex(V, tol);
1453 }
1454 }
1455}
1456
1457//=======================================================================
1458//function : OrientClosedSolid
1459//purpose :
1460//=======================================================================
1461Standard_Boolean BRepLib::OrientClosedSolid(TopoDS_Solid& solid)
1462{
a86d3ec0 1463 // Set material inside the solid
7fd59977 1464 BRepClass3d_SolidClassifier where(solid);
1465 where.PerformInfinitePoint(Precision::Confusion());
1466 if (where.State()==TopAbs_IN) {
1467 solid.Reverse();
1468 }
1469 else if (where.State()==TopAbs_ON || where.State()==TopAbs_UNKNOWN)
1470 return Standard_False;
1471
1472 return Standard_True;
1473}
1474
1475//=======================================================================
1476//function : tgtfaces
0d969553
Y
1477//purpose : check the angle at the border between two squares.
1478// Two shares should have a shared front edge.
7fd59977 1479//=======================================================================
1480
1481static Standard_Boolean tgtfaces(const TopoDS_Edge& Ed,
a86d3ec0 1482 const TopoDS_Face& F1,
1483 const TopoDS_Face& F2,
1484 const Standard_Real ta,
1485 const Standard_Boolean couture)
7fd59977 1486{
4f933493 1487 // Check if pcurves exist on both faces of edge
1488 Standard_Real aFirst,aLast;
1489 Handle(Geom2d_Curve) aCurve;
1490 aCurve = BRep_Tool::CurveOnSurface(Ed,F1,aFirst,aLast);
1491 if(aCurve.IsNull())
1492 return Standard_False;
1493 aCurve = BRep_Tool::CurveOnSurface(Ed,F2,aFirst,aLast);
1494 if(aCurve.IsNull())
1495 return Standard_False;
1496
7fd59977 1497 Standard_Real u;
1498 TopoDS_Edge E = Ed;
1499 BRepAdaptor_Surface aBAS1(F1,Standard_False);
1500 BRepAdaptor_Surface aBAS2(F2,Standard_False);
1501 Handle(BRepAdaptor_HSurface) HS1 = new BRepAdaptor_HSurface(aBAS1);
1502 Handle(BRepAdaptor_HSurface) HS2;
1503 if(couture) HS2 = HS1;
1504 else HS2 = new BRepAdaptor_HSurface(aBAS2);
1505
1506 E.Orientation(TopAbs_FORWARD);
1507 Handle(BRepAdaptor_HCurve2d) HC2d1 = new BRepAdaptor_HCurve2d();
1508 HC2d1->ChangeCurve2d().Initialize(E,F1);
1509 if(couture) E.Orientation(TopAbs_REVERSED);
1510 Handle(BRepAdaptor_HCurve2d) HC2d2 = new BRepAdaptor_HCurve2d();
1511 HC2d2->ChangeCurve2d().Initialize(E,F2);
1512 Adaptor3d_CurveOnSurface C1(HC2d1,HS1);
1513 Adaptor3d_CurveOnSurface C2(HC2d2,HS2);
1514
1515 Standard_Boolean rev1 = (F1.Orientation() == TopAbs_REVERSED);
1516 Standard_Boolean rev2 = (F2.Orientation() == TopAbs_REVERSED);
c6541a0c 1517 Standard_Real f,l,eps, angmax = -M_PI;
7fd59977 1518 Standard_Real ang =0.;
7fd59977 1519 BRep_Tool::Range(E,f,l);
1520 Extrema_LocateExtPC ext;
1521 Standard_Boolean IsInitialized = Standard_False;
a86d3ec0 1522
7fd59977 1523 eps = (l - f)/100.;
0d969553
Y
1524 f += eps; // to avoid calculations on
1525 l -= eps; // points of pointed squares.
7fd59977 1526 gp_Pnt2d p;
1527 gp_Pnt pp1,pp2;//,PP;
1528 gp_Vec du,dv;
1529 gp_Vec d1,d2;
1530 Standard_Real uu, vv, norm;
1531
1532 Standard_Integer i;
1533 Standard_Boolean Nok;
1534 for(i = 0; (i<= 20) && (angmax<=ta) ; i++){
0d969553 1535 // First suppose that this is sameParameter
7fd59977 1536 Nok = Standard_True;
1537 u = f + (l-f)*i/20;
1538 HC2d1->D0(u,p);
1539 HS1->D1(p.X(),p.Y(),pp1,du,dv);
1540 d1 = (du.Crossed(dv));
1541 norm = d1.Magnitude();
1542 if (norm > 1.e-12) d1 /= norm;
1543 else Nok=Standard_False;
1544 if(rev1) d1.Reverse();
1545
1546 HC2d2->D0(u,p);
1547 HS2->D1(p.X(), p.Y(), pp2, du, dv);
1548 d2 = (du.Crossed(dv));
1549 norm = d2.Magnitude();
1550 if (norm> 1.e-12) d2 /= norm;
1551 else Nok=Standard_False;
1552 if(rev2) d2.Reverse();
1553 if (Nok) ang = d1.Angle(d2);
1554
0d969553 1555 if (Nok &&(ang > ta)) { // Refine by projection
7fd59977 1556 if (! IsInitialized ) {
a86d3ec0 1557 ext.Initialize(C2,f,l,Precision::PConfusion());
1558 IsInitialized = Standard_True;
7fd59977 1559 }
1560 ext.Perform(pp1,u);
1561 if(ext.IsDone() && ext.IsMin()){
a86d3ec0 1562 Extrema_POnCurv poc = ext.Point();
1563 Standard_Real v = poc.Parameter();
1564
1565 HC2d2->D0(v,p);
1566 p.Coord(uu,vv);
1567 HS2->D1(p.X(), p.Y(), pp2, du, dv);
1568 d2 = (du.Crossed(dv));
1569 norm = d2.Magnitude();
1570 if (norm> 1.e-12) d2 /= norm;
1571 else Nok = Standard_False;
1572 if(rev2) d2.Reverse();
1573 if (Nok) ang = d1.Angle(d2);
7fd59977 1574 }
1575 }
1576 if(ang >= angmax) angmax = ang;
1577 }
a86d3ec0 1578
7fd59977 1579 return (angmax<=ta);
1580
1581}
1582
1583
1584//=======================================================================
1585// function : EncodeRegularity
0d969553
Y
1586// purpose : code the regularities on all edges of the shape, boundary of
1587// two faces that do not have it.
7fd59977 1588//=======================================================================
1589
1590void BRepLib::EncodeRegularity(const TopoDS_Shape& S,
a86d3ec0 1591 const Standard_Real TolAng)
7fd59977 1592{
1593 BRep_Builder B;
1594 TopTools_IndexedDataMapOfShapeListOfShape M;
1595 TopExp::MapShapesAndAncestors(S,TopAbs_EDGE,TopAbs_FACE,M);
1596 TopTools_ListIteratorOfListOfShape It;
1597 TopExp_Explorer Ex;
1598 TopoDS_Face F1,F2;
1599 Standard_Boolean found, couture;
1600 for(Standard_Integer i = 1; i <= M.Extent(); i++){
1601 TopoDS_Edge E = TopoDS::Edge(M.FindKey(i));
1602 found = Standard_False; couture = Standard_False;
1603 F1.Nullify();
1604 for(It.Initialize(M.FindFromIndex(i));It.More() && !found;It.Next()){
1605 if(F1.IsNull()) { F1 = TopoDS::Face(It.Value()); }
1606 else {
a86d3ec0 1607 if(!F1.IsSame(TopoDS::Face(It.Value()))){
1608 found = Standard_True;
1609 F2 = TopoDS::Face(It.Value());
1610 }
7fd59977 1611 }
1612 }
0d969553 1613 if (!found && !F1.IsNull()){//is it a sewing edge?
7fd59977 1614 TopAbs_Orientation orE = E.Orientation();
1615 TopoDS_Edge curE;
1616 for(Ex.Init(F1,TopAbs_EDGE);Ex.More() && !found;Ex.Next()){
a86d3ec0 1617 curE= TopoDS::Edge(Ex.Current());
1618 if(E.IsSame(curE) && orE != curE.Orientation()) {
1619 found = Standard_True;
1620 couture = Standard_True;
1621 F2 = F1;
1622 }
7fd59977 1623 }
1624 }
1625 if(found){
1626 if(BRep_Tool::Continuity(E,F1,F2)<=GeomAbs_C0){
041bfce9 1627
1628 try {
a86d3ec0 1629 if(tgtfaces(E, F1, F2, TolAng, couture)){
1630 B.Continuity(E,F1,F2,GeomAbs_G1);
041bfce9 1631 }
1632 }
1633 catch(Standard_Failure)
1634 {
1635 }
7fd59977 1636 }
1637 }
1638 }
1639}
1640
1641//=======================================================================
1642// function : EncodeRegularity
0d969553 1643// purpose : code the regularity between 2 faces on an edge
7fd59977 1644//=======================================================================
1645
1646void BRepLib::EncodeRegularity(TopoDS_Edge& E,
a86d3ec0 1647 const TopoDS_Face& F1,
1648 const TopoDS_Face& F2,
1649 const Standard_Real TolAng)
7fd59977 1650{
1651 BRep_Builder B;
1652 if(BRep_Tool::Continuity(E,F1,F2)<=GeomAbs_C0){
041bfce9 1653 try {
1654 if( tgtfaces(E, F1, F2, TolAng, F1.IsEqual(F2))) {
1655 B.Continuity(E,F1,F2,GeomAbs_G1);
1656 }
1657 }
1658 catch(Standard_Failure)
1659 {
1660 }
a86d3ec0 1661 }
7fd59977 1662}
1663
1664//=======================================================================
7693827d 1665// function : EnsureNormalConsistency
1666// purpose : Corrects the normals in Poly_Triangulation of faces.
1667// Returns TRUE if any correction is done.
1668//=======================================================================
1669Standard_Boolean BRepLib::
1670 EnsureNormalConsistency(const TopoDS_Shape& theShape,
1671 const Standard_Real theAngTol,
1672 const Standard_Boolean theForceComputeNormals)
1673{
1674 const Standard_Real aThresDot = cos(theAngTol);
1675
1676 Standard_Boolean aRetVal = Standard_False, isNormalsFound = Standard_False;
1677
1678 // compute normals if they are absent
1679 TopExp_Explorer anExpFace(theShape,TopAbs_FACE);
1680 for (; anExpFace.More(); anExpFace.Next())
1681 {
1682 const TopoDS_Face& aFace = TopoDS::Face(anExpFace.Current());
1683 const Handle(Geom_Surface) aSurf = BRep_Tool::Surface(aFace);
1684 if(aSurf.IsNull())
1685 continue;
1686 TopLoc_Location aLoc;
1687 const Handle(Poly_Triangulation)& aPT = BRep_Tool::Triangulation(aFace, aLoc);
1688 if(aPT.IsNull())
1689 continue;
1690 if (!theForceComputeNormals && aPT->HasNormals())
1691 {
1692 isNormalsFound = Standard_True;
1693 continue;
1694 }
1695
1696 GeomLProp_SLProps aSLP(aSurf, 2, Precision::Confusion());
1697 const Standard_Integer anArrDim = 3*aPT->NbNodes();
1698 Handle(TShort_HArray1OfShortReal) aNormArr = new TShort_HArray1OfShortReal(1, anArrDim);
1699 Standard_Integer anNormInd = aNormArr->Lower();
1700 for(Standard_Integer i = aPT->UVNodes().Lower(); i <= aPT->UVNodes().Upper(); i++)
1701 {
1702 const gp_Pnt2d &aP2d = aPT->UVNodes().Value(i);
1703 aSLP.SetParameters(aP2d.X(), aP2d.Y());
1704
1705 gp_XYZ aNorm(0.,0.,0.);
1706 if(!aSLP.IsNormalDefined())
1707 {
1708#ifdef OCCT_DEBUG
1709 cout << "BRepLib::EnsureNormalConsistency(): Cannot find normal!" << endl;
1710#endif
1711 }
1712 else
1713 {
1714 aNorm = aSLP.Normal().XYZ();
1715 if (aFace.Orientation() == TopAbs_REVERSED)
1716 aNorm.Reverse();
1717 }
1718 aNormArr->ChangeValue(anNormInd++) = static_cast<Standard_ShortReal>(aNorm.X());
1719 aNormArr->ChangeValue(anNormInd++) = static_cast<Standard_ShortReal>(aNorm.Y());
1720 aNormArr->ChangeValue(anNormInd++) = static_cast<Standard_ShortReal>(aNorm.Z());
1721 }
1722
1723 aRetVal = Standard_True;
1724 isNormalsFound = Standard_True;
1725 aPT->SetNormals(aNormArr);
1726 }
1727
1728 if(!isNormalsFound)
1729 {
1730 return aRetVal;
1731 }
1732
1733 // loop by edges
1734 TopTools_IndexedDataMapOfShapeListOfShape aMapEF;
1735 TopExp::MapShapesAndAncestors(theShape,TopAbs_EDGE,TopAbs_FACE,aMapEF);
1736 for(Standard_Integer anInd = 1; anInd <= aMapEF.Extent(); anInd++)
1737 {
1738 const TopoDS_Edge& anEdg = TopoDS::Edge(aMapEF.FindKey(anInd));
1739 const TopTools_ListOfShape& anEdgList = aMapEF.FindFromIndex(anInd);
1740 if (anEdgList.Extent() != 2)
1741 continue;
1742 TopTools_ListIteratorOfListOfShape anItF(anEdgList);
1743 const TopoDS_Face aFace1 = TopoDS::Face(anItF.Value());
1744 anItF.Next();
1745 const TopoDS_Face aFace2 = TopoDS::Face(anItF.Value());
1746 TopLoc_Location aLoc1, aLoc2;
1747 const Handle(Poly_Triangulation)& aPT1 = BRep_Tool::Triangulation(aFace1, aLoc1);
1748 const Handle(Poly_Triangulation)& aPT2 = BRep_Tool::Triangulation(aFace2, aLoc2);
1749
1750 if(aPT1.IsNull() || aPT2.IsNull())
1751 continue;
1752
1753 if(!aPT1->HasNormals() || !aPT2->HasNormals())
1754 continue;
1755
1756 const Handle(Poly_PolygonOnTriangulation)& aPTEF1 =
1757 BRep_Tool::PolygonOnTriangulation(anEdg, aPT1, aLoc1);
1758 const Handle(Poly_PolygonOnTriangulation)& aPTEF2 =
1759 BRep_Tool::PolygonOnTriangulation(anEdg, aPT2, aLoc2);
1760
1761 TShort_Array1OfShortReal& aNormArr1 = aPT1->ChangeNormals();
1762 TShort_Array1OfShortReal& aNormArr2 = aPT2->ChangeNormals();
1763
1764 for(Standard_Integer anEdgNode = aPTEF1->Nodes().Lower();
1765 anEdgNode <= aPTEF1->Nodes().Upper(); anEdgNode++)
1766 {
1767 //Number of node
1768 const Standard_Integer aFNodF1 = aPTEF1->Nodes().Value(anEdgNode);
1769 const Standard_Integer aFNodF2 = aPTEF2->Nodes().Value(anEdgNode);
1770
1771 const Standard_Integer aFNorm1FirstIndex = aNormArr1.Lower() + 3*
1772 (aFNodF1 - aPT1->Nodes().Lower());
1773 const Standard_Integer aFNorm2FirstIndex = aNormArr2.Lower() + 3*
1774 (aFNodF2 - aPT2->Nodes().Lower());
1775
1776 gp_XYZ aNorm1(aNormArr1.Value(aFNorm1FirstIndex),
1777 aNormArr1.Value(aFNorm1FirstIndex+1),
1778 aNormArr1.Value(aFNorm1FirstIndex+2));
1779 gp_XYZ aNorm2(aNormArr2.Value(aFNorm2FirstIndex),
1780 aNormArr2.Value(aFNorm2FirstIndex+1),
1781 aNormArr2.Value(aFNorm2FirstIndex+2));
1782 const Standard_Real aDot = aNorm1 * aNorm2;
1783
1784 if(aDot > aThresDot)
1785 {
1786 gp_XYZ aNewNorm = (aNorm1 + aNorm2).Normalized();
1787 aNormArr1.ChangeValue(aFNorm1FirstIndex) =
1788 aNormArr2.ChangeValue(aFNorm2FirstIndex) =
1789 static_cast<Standard_ShortReal>(aNewNorm.X());
1790 aNormArr1.ChangeValue(aFNorm1FirstIndex+1) =
1791 aNormArr2.ChangeValue(aFNorm2FirstIndex+1) =
1792 static_cast<Standard_ShortReal>(aNewNorm.Y());
1793 aNormArr1.ChangeValue(aFNorm1FirstIndex+2) =
1794 aNormArr2.ChangeValue(aFNorm2FirstIndex+2) =
1795 static_cast<Standard_ShortReal>(aNewNorm.Z());
1796 aRetVal = Standard_True;
1797 }
1798 }
1799 }
1800
1801 return aRetVal;
1802}
1803
1804//=======================================================================
7fd59977 1805//function : SortFaces
1806//purpose :
1807//=======================================================================
1808
1809void BRepLib::SortFaces (const TopoDS_Shape& Sh,
a86d3ec0 1810 TopTools_ListOfShape& LF)
7fd59977 1811{
1812 LF.Clear();
1813 TopTools_ListOfShape LTri,LPlan,LCyl,LCon,LSphere,LTor,LOther;
1814 TopExp_Explorer exp(Sh,TopAbs_FACE);
1815 TopLoc_Location l;
1816 Handle(Geom_Surface) S;
1817
1818 for (; exp.More(); exp.Next()) {
1819 const TopoDS_Face& F = TopoDS::Face(exp.Current());
1820 S = BRep_Tool::Surface(F, l);
1821 if (!S.IsNull()) {
1822 if (S->DynamicType() == STANDARD_TYPE(Geom_RectangularTrimmedSurface)) {
c5f3a425 1823 S = Handle(Geom_RectangularTrimmedSurface)::DownCast (S)->BasisSurface();
7fd59977 1824 }
1825 GeomAdaptor_Surface AS(S);
1826 switch (AS.GetType()) {
1827 case GeomAbs_Plane:
a86d3ec0 1828 {
1829 LPlan.Append(F);
1830 break;
1831 }
7fd59977 1832 case GeomAbs_Cylinder:
a86d3ec0 1833 {
1834 LCyl.Append(F);
1835 break;
1836 }
7fd59977 1837 case GeomAbs_Cone:
a86d3ec0 1838 {
1839 LCon.Append(F);
1840 break;
1841 }
7fd59977 1842 case GeomAbs_Sphere:
a86d3ec0 1843 {
1844 LSphere.Append(F);
1845 break;
1846 }
7fd59977 1847 case GeomAbs_Torus:
a86d3ec0 1848 {
1849 LTor.Append(F);
1850 break;
1851 }
7fd59977 1852 default:
a86d3ec0 1853 LOther.Append(F);
7fd59977 1854 }
1855 }
1856 else LTri.Append(F);
1857 }
1858 LF.Append(LPlan); LF.Append(LCyl ); LF.Append(LCon); LF.Append(LSphere);
1859 LF.Append(LTor ); LF.Append(LOther); LF.Append(LTri);
1860}
1861
1862//=======================================================================
1863//function : ReverseSortFaces
1864//purpose :
1865//=======================================================================
1866
1867void BRepLib::ReverseSortFaces (const TopoDS_Shape& Sh,
a86d3ec0 1868 TopTools_ListOfShape& LF)
7fd59977 1869{
1870 LF.Clear();
1871 TopTools_ListOfShape LTri,LPlan,LCyl,LCon,LSphere,LTor,LOther;
1872 TopExp_Explorer exp(Sh,TopAbs_FACE);
1873 TopLoc_Location l;
1874 Handle(Geom_Surface) S;
a86d3ec0 1875
7fd59977 1876 for (; exp.More(); exp.Next()) {
1877 const TopoDS_Face& F = TopoDS::Face(exp.Current());
1878 S = BRep_Tool::Surface(F, l);
1879 if (!S.IsNull()) {
1880 if (S->DynamicType() == STANDARD_TYPE(Geom_RectangularTrimmedSurface)) {
c5f3a425 1881 S = Handle(Geom_RectangularTrimmedSurface)::DownCast (S)->BasisSurface();
7fd59977 1882 }
1883 GeomAdaptor_Surface AS(S);
1884 switch (AS.GetType()) {
1885 case GeomAbs_Plane:
a86d3ec0 1886 {
1887 LPlan.Append(F);
1888 break;
1889 }
7fd59977 1890 case GeomAbs_Cylinder:
a86d3ec0 1891 {
1892 LCyl.Append(F);
1893 break;
1894 }
7fd59977 1895 case GeomAbs_Cone:
a86d3ec0 1896 {
1897 LCon.Append(F);
1898 break;
1899 }
7fd59977 1900 case GeomAbs_Sphere:
a86d3ec0 1901 {
1902 LSphere.Append(F);
1903 break;
1904 }
7fd59977 1905 case GeomAbs_Torus:
a86d3ec0 1906 {
1907 LTor.Append(F);
1908 break;
1909 }
7fd59977 1910 default:
a86d3ec0 1911 LOther.Append(F);
7fd59977 1912 }
1913 }
1914 else LTri.Append(F);
1915 }
1916 LF.Append(LTri); LF.Append(LOther); LF.Append(LTor ); LF.Append(LSphere);
1917 LF.Append(LCon); LF.Append(LCyl ); LF.Append(LPlan);
7fd59977 1918
a86d3ec0 1919}
7fd59977 1920