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0022048: Visualization, AIS_InteractiveContext - single object selection should alway...
[occt.git] / src / Geom2d / Geom2d_BezierCurve.cxx
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b311480e 1// Created on: 1993-03-25
2// Created by: JCV
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
7fd59977 17// Passage en classe persistante - 23/01/91
18// Modif suite a la deuxieme revue de projet toolkit Geometry -23/01/91
19// Infos :
20// Actuellement pour les champs de la courbe le tableau des poles est
21// declare de 1 a NbPoles et le tableau des poids est declare de 1 a NbPoles
22
23
24// Revised RLE Aug 19 1993
25// Suppressed Swaps, added Init, removed typedefs
26
27#define No_Standard_OutOfRange
28#define No_Standard_DimensionError
29
42cf5bc1 30
42cf5bc1 31#include <Geom2d_BezierCurve.hxx>
32#include <Geom2d_Geometry.hxx>
7fd59977 33#include <gp.hxx>
42cf5bc1 34#include <gp_Pnt2d.hxx>
35#include <gp_Trsf2d.hxx>
36#include <gp_Vec2d.hxx>
7fd59977 37#include <gp_XY.hxx>
42cf5bc1 38#include <PLib.hxx>
7fd59977 39#include <Standard_ConstructionError.hxx>
40#include <Standard_DimensionError.hxx>
41#include <Standard_OutOfRange.hxx>
42#include <Standard_RangeError.hxx>
42cf5bc1 43#include <Standard_Type.hxx>
7fd59977 44#include <TColStd_Array1OfInteger.hxx>
42cf5bc1 45#include <TColStd_Array1OfReal.hxx>
7fd59977 46
92efcf78 47IMPLEMENT_STANDARD_RTTIEXT(Geom2d_BezierCurve,Geom2d_BoundedCurve)
48
7fd59977 49//=======================================================================
50//function : Rational
51//purpose : check rationality of an array of weights
52//=======================================================================
7fd59977 53static Standard_Boolean Rational(const TColStd_Array1OfReal& W)
54{
55 Standard_Integer i, n = W.Length();
56 Standard_Boolean rat = Standard_False;
57 for (i = 1; i < n; i++) {
58 rat = Abs(W(i) - W(i+1)) > gp::Resolution();
59 if (rat) break;
60 }
61 return rat;
62}
63
64
65//=======================================================================
66//function : Geom2d_BezierCurve
67//purpose :
68//=======================================================================
69
70Geom2d_BezierCurve::Geom2d_BezierCurve
c8b5b3d8 71 (const TColgp_Array1OfPnt2d& Poles)
7fd59977 72{
73 // copy the poles
74
75 Handle(TColgp_HArray1OfPnt2d) npoles =
76 new TColgp_HArray1OfPnt2d(1,Poles.Length());
77
78 npoles->ChangeArray1() = Poles;
79
80 // Init non rational
81 Init(npoles,
82 Handle(TColStd_HArray1OfReal)());
83}
84
85
86//=======================================================================
87//function : Geom2d_BezierCurve
88//purpose :
89//=======================================================================
90
91Geom2d_BezierCurve::Geom2d_BezierCurve
c8b5b3d8 92(const TColgp_Array1OfPnt2d& Poles,
93 const TColStd_Array1OfReal& Weights)
7fd59977 94
95{
96 // copy the poles
97
98 Handle(TColgp_HArray1OfPnt2d) npoles =
99 new TColgp_HArray1OfPnt2d(1,Poles.Length());
100
101 npoles->ChangeArray1() = Poles;
102
103
104 // check the weights
105
106 Standard_Integer nbpoles = Poles.Length();
107
108 if (Weights.Length() != nbpoles)
9775fa61 109 throw Standard_ConstructionError();
7fd59977 110
111 Standard_Integer i;
112 for (i = 1; i <= nbpoles; i++) {
113 if (Weights(i) <= gp::Resolution()) {
9775fa61 114 throw Standard_ConstructionError();
7fd59977 115 }
116 }
117
118 // check really rational
119 Standard_Boolean rat = Rational(Weights);
120
121 // copy the weights
122 Handle(TColStd_HArray1OfReal) nweights;
123 if (rat) {
124 nweights = new TColStd_HArray1OfReal(1,nbpoles);
125 nweights->ChangeArray1() = Weights;
126 }
127
128 // Init
129 Init(npoles,nweights);
130}
131
132
133//=======================================================================
134//function : Increase
135//purpose : increase degree
136//=======================================================================
137
138void Geom2d_BezierCurve::Increase (const Standard_Integer Deg)
139{
140 if (Deg == Degree()) return;
141
142 Standard_ConstructionError_Raise_if
143 (Deg < Degree() ||
144 Deg > Geom2d_BezierCurve::MaxDegree(), "Geom2d_BezierCurve::Increase");
145
146 Handle(TColgp_HArray1OfPnt2d) npoles =
147 new TColgp_HArray1OfPnt2d(1,Deg+1);
148
149 Handle(TColStd_HArray1OfReal) nweights;
150
151 TColStd_Array1OfReal bidknots(1,2); bidknots(1) = 0.; bidknots(2) = 1.;
152 TColStd_Array1OfInteger bidmults(1,2); bidmults.Init(Degree() + 1);
153
154 if (IsRational()) {
155 nweights = new TColStd_HArray1OfReal(1,Deg+1);
156 BSplCLib::IncreaseDegree(Degree(), Deg, 0,
0e14656b 157 poles->Array1(),&weights->Array1(),
7fd59977 158 bidknots, bidmults,
0e14656b 159 npoles->ChangeArray1(),&nweights->ChangeArray1(),
7fd59977 160 bidknots, bidmults);
161 }
162 else {
163 BSplCLib::IncreaseDegree(Degree(), Deg, 0,
164 poles->Array1(),
0e14656b 165 BSplCLib::NoWeights(),
7fd59977 166 bidknots, bidmults,
167 npoles->ChangeArray1(),
0e14656b 168 BSplCLib::NoWeights(),
7fd59977 169 bidknots, bidmults);
170 }
171
172 Init(npoles,nweights);
173}
174
175
176//=======================================================================
177//function : MaxDegree
178//purpose :
179//=======================================================================
180
181Standard_Integer Geom2d_BezierCurve::MaxDegree ()
182{
183 return BSplCLib::MaxDegree();
184}
185
186
187//=======================================================================
188//function : InsertPoleAfter
189//purpose :
190//=======================================================================
191
192void Geom2d_BezierCurve::InsertPoleAfter
193(const Standard_Integer Index,
194 const gp_Pnt2d& P,
195 const Standard_Real Weight)
196{
197 Standard_Integer nbpoles = NbPoles();
198
199 Standard_ConstructionError_Raise_if
200 (nbpoles >= Geom2d_BezierCurve::MaxDegree() ||
201 Weight <= gp::Resolution(),
202 "Geom2d_BezierCurve::InsertPoleAfter" );
203
204 Standard_OutOfRange_Raise_if
205 (Index < 0 || Index > nbpoles,
206 "Geom2d_BezierCurve::InsertPoleAfter");
207
208 Standard_Integer i;
209
210 // Insert the pole
211 Handle(TColgp_HArray1OfPnt2d) npoles =
212 new TColgp_HArray1OfPnt2d(1,nbpoles+1);
213
214 TColgp_Array1OfPnt2d& newpoles = npoles->ChangeArray1();
215 const TColgp_Array1OfPnt2d& oldpoles = poles->Array1();
216
217 for (i = 1; i <= Index; i++)
218 newpoles(i) = oldpoles(i);
219
220 newpoles(Index+1) = P;
221
222 for (i = Index+1; i <= nbpoles; i++)
223 newpoles(i+1) = oldpoles(i);
224
225
226 // Insert the weight
227 Handle(TColStd_HArray1OfReal) nweights;
228 Standard_Boolean rat = IsRational() || Abs(Weight-1.) > gp::Resolution();
229
230 if (rat) {
231 nweights = new TColStd_HArray1OfReal(1,nbpoles+1);
232 TColStd_Array1OfReal& newweights = nweights->ChangeArray1();
233
234 for (i = 1; i <= Index; i++)
235 if (IsRational())
236 newweights(i) = weights->Value(i);
237 else
238 newweights(i) = 1.;
239
240 newweights(Index+1) = Weight;
241
242 for (i = Index+1; i <= nbpoles; i++)
243 if (IsRational())
244 newweights(i+1) = weights->Value(i);
245 else
246 newweights(i+1) = 1.;
247 }
248
249
250 Init(npoles,nweights);
251}
252
253
254//=======================================================================
255//function : InsertPoleBefore
256//purpose :
257//=======================================================================
258
259void Geom2d_BezierCurve::InsertPoleBefore
260(const Standard_Integer Index,
261 const gp_Pnt2d& P,
262 const Standard_Real Weight)
263{
264 InsertPoleAfter(Index-1,P,Weight);
265}
266
267
268//=======================================================================
269//function : RemovePole
270//purpose :
271//=======================================================================
272
273void Geom2d_BezierCurve::RemovePole
274(const Standard_Integer Index)
275{
276 Standard_Integer nbpoles = NbPoles();
277
278 Standard_ConstructionError_Raise_if
279 (nbpoles <= 2 , "Geom2d_BezierCurve::RemovePole" );
280
281 Standard_OutOfRange_Raise_if
282 (Index < 1 || Index > nbpoles,
283 "Geom2d_BezierCurve::RemovePole");
284
285 Standard_Integer i;
286
287 // Remove the pole
288 Handle(TColgp_HArray1OfPnt2d) npoles =
289 new TColgp_HArray1OfPnt2d(1,nbpoles-1);
290
291 TColgp_Array1OfPnt2d& newpoles = npoles->ChangeArray1();
292 const TColgp_Array1OfPnt2d& oldpoles = poles->Array1();
293
294 for (i = 1; i < Index; i++)
295 newpoles(i) = oldpoles(i);
296
297 for (i = Index+1; i <= nbpoles; i++)
298 newpoles(i-1) = oldpoles(i);
299
300
301 // Remove the weight
302 Handle(TColStd_HArray1OfReal) nweights;
303
304 if (IsRational()) {
305 nweights = new TColStd_HArray1OfReal(1,nbpoles-1);
306 TColStd_Array1OfReal& newweights = nweights->ChangeArray1();
307 const TColStd_Array1OfReal& oldweights = weights->Array1();
308
309 for (i = 1; i < Index; i++)
310 newweights(i) = oldweights(i);
311
312 for (i = Index+1; i <= nbpoles; i++)
313 newweights(i-1) = oldweights(i);
314 }
315
316 Init(npoles,nweights);
317}
318
319
320//=======================================================================
321//function : Reverse
322//purpose :
323//=======================================================================
324
325void Geom2d_BezierCurve::Reverse ()
326{
327 gp_Pnt2d P;
328 Standard_Integer i, nbpoles = NbPoles();
329 TColgp_Array1OfPnt2d & cpoles = poles->ChangeArray1();
330
331 // reverse poles
332 for (i = 1; i <= nbpoles / 2; i++) {
333 P = cpoles(i);
334 cpoles(i) = cpoles(nbpoles-i+1);
335 cpoles(nbpoles-i+1) = P;
336 }
337
338 // reverse weights
339 if (IsRational()) {
340 TColStd_Array1OfReal & cweights = weights->ChangeArray1();
341 Standard_Real w;
342 for (i = 1; i <= nbpoles / 2; i++) {
343 w = cweights(i);
344 cweights(i) = cweights(nbpoles-i+1);
345 cweights(nbpoles-i+1) = w;
346 }
347 }
7fd59977 348}
349
350
351//=======================================================================
352//function : ReversedParameter
353//purpose :
354//=======================================================================
355
356Standard_Real Geom2d_BezierCurve::ReversedParameter
357( const Standard_Real U) const
358{
359 return ( 1. - U);
360}
361
362
363//=======================================================================
364//function : Segment
365//purpose :
366//=======================================================================
367
368void Geom2d_BezierCurve::Segment
369(const Standard_Real U1, const Standard_Real U2)
370{
371 closed = (Abs(Value(U1).Distance (Value(U2))) <= gp::Resolution());
372//
373// WARNING : when calling trimming be carefull that the cache
374// is computed regarding 0.0e0 and not 1.0e0
375//
c8b5b3d8 376 TColStd_Array1OfReal bidflatknots(BSplCLib::FlatBezierKnots(Degree()), 1, 2 * (Degree() + 1));
377 TColgp_Array1OfPnt2d coeffs(1, poles->Size());
7fd59977 378 if (IsRational()) {
c8b5b3d8 379 TColStd_Array1OfReal wcoeffs(1, poles->Size());
380 BSplCLib::BuildCache(0.0, 1.0, 0, Degree(), bidflatknots,
381 poles->Array1(), &weights->Array1(), coeffs, &wcoeffs);
382 PLib::Trimming(U1, U2, coeffs, &wcoeffs);
383 PLib::CoefficientsPoles(coeffs, &wcoeffs, poles->ChangeArray1(), &weights->ChangeArray1());
7fd59977 384 }
385 else {
c8b5b3d8 386 BSplCLib::BuildCache(0.0, 1.0, 0, Degree(), bidflatknots,
387 poles->Array1(), BSplCLib::NoWeights(), coeffs, BSplCLib::NoWeights());
388 PLib::Trimming(U1, U2, coeffs, PLib::NoWeights());
389 PLib::CoefficientsPoles(coeffs, PLib::NoWeights(), poles->ChangeArray1(), PLib::NoWeights());
7fd59977 390 }
7fd59977 391}
392
393
394//=======================================================================
395//function : SetPole
396//purpose :
397//=======================================================================
398
399void Geom2d_BezierCurve::SetPole
400(const Standard_Integer Index,
401 const gp_Pnt2d& P)
402{
403 Standard_OutOfRange_Raise_if (Index < 1 || Index > NbPoles(),
404 "Geom2d_BezierCurve::SetPole");
405
406 TColgp_Array1OfPnt2d& cpoles = poles->ChangeArray1();
407 cpoles(Index) = P;
408
409 if (Index == 1 || Index == cpoles.Length()) {
410 closed = (cpoles(1).Distance(cpoles(NbPoles())) <= gp::Resolution());
411 }
7fd59977 412}
413
414
415//=======================================================================
416//function : SetPole
417//purpose :
418//=======================================================================
419
420void Geom2d_BezierCurve::SetPole
421(const Standard_Integer Index,
422 const gp_Pnt2d& P,
423 const Standard_Real Weight)
424{
425 SetPole(Index,P);
426 SetWeight(Index,Weight);
427}
428
429
430//=======================================================================
431//function : SetWeight
432//purpose :
433//=======================================================================
434
435void Geom2d_BezierCurve::SetWeight
436(const Standard_Integer Index,
437 const Standard_Real Weight)
438{
439 Standard_Integer nbpoles = NbPoles();
440
441 Standard_OutOfRange_Raise_if
442 (Index < 1 || Index > nbpoles,
443 "Geom2d_BezierCurve::SetWeight");
444 Standard_ConstructionError_Raise_if
445 (Weight <= gp::Resolution (),
446 "Geom2d_BezierCurve::SetWeight");
447
448
449 // compute new rationality
450 Standard_Boolean wasrat = IsRational();
451 if (!wasrat) {
452 // a weight of 1. does not turn to rational
453 if (Abs(Weight - 1.) <= gp::Resolution()) return;
454
455 // set weights of 1.
456 weights = new TColStd_HArray1OfReal(1,nbpoles);
7fd59977 457 weights->Init(1.);
458 }
459
460 TColStd_Array1OfReal & cweights = weights->ChangeArray1();
461 cweights(Index) = Weight;
462
463 // is it turning into non rational
c8b5b3d8 464 if (wasrat && !Rational(cweights))
465 weights.Nullify();
7fd59977 466}
467
468
469//=======================================================================
470//function : IsClosed
471//purpose :
472//=======================================================================
473
474Standard_Boolean Geom2d_BezierCurve::IsClosed () const
475{
476 return closed;
477}
478
479
480//=======================================================================
481//function : IsCN
482//purpose :
483//=======================================================================
484
485Standard_Boolean Geom2d_BezierCurve::IsCN (const Standard_Integer ) const
486{
487 return Standard_True;
488}
489
490
491//=======================================================================
492//function : IsPeriodic
493//purpose :
494//=======================================================================
495
496Standard_Boolean Geom2d_BezierCurve::IsPeriodic () const
497{
498 return Standard_False;
499}
500
501
502//=======================================================================
503//function : IsRational
504//purpose :
505//=======================================================================
506
507Standard_Boolean Geom2d_BezierCurve::IsRational () const
508{
509 return !weights.IsNull();
510}
511
512
513//=======================================================================
514//function : Continuity
515//purpose :
516//=======================================================================
517
518GeomAbs_Shape Geom2d_BezierCurve::Continuity () const
519{
520 return GeomAbs_CN;
521}
522
523
524//=======================================================================
525//function : Degree
526//purpose :
527//=======================================================================
528
529Standard_Integer Geom2d_BezierCurve::Degree () const
530{
531 return poles->Length()-1;
532}
533
534
535//=======================================================================
536//function : D0
537//purpose :
538//=======================================================================
539
540void Geom2d_BezierCurve::D0 (const Standard_Real U, gp_Pnt2d& P ) const
541{
c8b5b3d8 542 BSplCLib::D0(U, Poles(), Weights(), P);
7fd59977 543}
544
545//=======================================================================
546//function : D1
547//purpose :
548//=======================================================================
549
550void Geom2d_BezierCurve::D1(const Standard_Real U,
551 gp_Pnt2d& P,
552 gp_Vec2d& V1) const
553{
c8b5b3d8 554 BSplCLib::D1(U, Poles(), Weights(), P, V1);
7fd59977 555}
556
557//=======================================================================
558//function : D2
559//purpose :
560//=======================================================================
561
562void Geom2d_BezierCurve::D2 (const Standard_Real U,
563 gp_Pnt2d& P,
564 gp_Vec2d& V1,
565 gp_Vec2d& V2) const
566{
c8b5b3d8 567 BSplCLib::D2(U, Poles(), Weights(), P, V1, V2);
7fd59977 568}
569
570//=======================================================================
571//function : D3
572//purpose :
573//=======================================================================
574
575void Geom2d_BezierCurve::D3 (const Standard_Real U,
576 gp_Pnt2d& P,
577 gp_Vec2d& V1,
578 gp_Vec2d& V2,
579 gp_Vec2d& V3) const
580{
c8b5b3d8 581 BSplCLib::D3(U, Poles(), Weights(), P, V1, V2, V3);
7fd59977 582}
583
584//=======================================================================
585//function : DN
586//purpose :
587//=======================================================================
588
589gp_Vec2d Geom2d_BezierCurve::DN (const Standard_Real U,
590 const Standard_Integer N) const
591{
592 Standard_RangeError_Raise_if (N < 1, "Geom2d_BezierCurve::DN");
593 gp_Vec2d V;
594
595 TColStd_Array1OfReal bidknots(1,2); bidknots(1) = 0.; bidknots(2) = 1.;
596 TColStd_Array1OfInteger bidmults(1,2); bidmults.Init(Degree() + 1);
597
598 if (IsRational())
599 BSplCLib::DN(U,N,0,Degree(),Standard_False,
0e14656b 600 poles->Array1(),&weights->Array1(),
601 bidknots,&bidmults,V);
7fd59977 602 else
603 BSplCLib::DN(U,N,0,Degree(),Standard_False,
604 poles->Array1(),
0e14656b 605 BSplCLib::NoWeights(),
606 bidknots,&bidmults,V);
7fd59977 607 return V;
608}
609
610//=======================================================================
611//function : EndPoint
612//purpose :
613//=======================================================================
614
615gp_Pnt2d Geom2d_BezierCurve::EndPoint () const
616{
617 return poles->Value (poles->Upper());
618}
619
620
621//=======================================================================
622//function : FirstParameter
623//purpose :
624//=======================================================================
625
626Standard_Real Geom2d_BezierCurve::FirstParameter () const
627{
628 return 0.0;
629}
630
631
632//=======================================================================
633//function : LastParameter
634//purpose :
635//=======================================================================
636
637Standard_Real Geom2d_BezierCurve::LastParameter () const
638{
639 return 1.0;
640}
641
642
643//=======================================================================
644//function : NbPoles
645//purpose :
646//=======================================================================
647
648Standard_Integer Geom2d_BezierCurve::NbPoles () const
649{
650 return poles->Length();
651}
652
653
654//=======================================================================
655//function : Pole
656//purpose :
657//=======================================================================
658
81093856 659const gp_Pnt2d& Geom2d_BezierCurve::Pole (const Standard_Integer Index) const
7fd59977 660{
661 Standard_OutOfRange_Raise_if (Index < 1 || Index > poles->Length(),
662 "Geom2d_BezierCurve::Pole");
663 return poles->Value(Index);
664}
665
666
667//=======================================================================
668//function : Poles
669//purpose :
670//=======================================================================
671
672void Geom2d_BezierCurve::Poles (TColgp_Array1OfPnt2d& P) const
673{
674 Standard_DimensionError_Raise_if (P.Length() != poles->Length(),
675 "Geom2d_BezierCurve::Poles");
676 P = poles->Array1();
677}
678
679
680//=======================================================================
681//function : StartPoint
682//purpose :
683//=======================================================================
684
685gp_Pnt2d Geom2d_BezierCurve::StartPoint () const
686{
687 return poles->Value(1);
688}
689
690
691//=======================================================================
692//function : Weight
693//purpose :
694//=======================================================================
695
696Standard_Real Geom2d_BezierCurve::Weight
697(const Standard_Integer Index) const
698{
699 Standard_OutOfRange_Raise_if (Index < 1 || Index > weights->Length(),
700 "Geom2d_BezierCurve::Weight");
701 if (IsRational())
702 return weights->Value(Index);
703 else
704 return 1.;
705}
706
707
708//=======================================================================
709//function : Weights
710//purpose :
711//=======================================================================
712
713void Geom2d_BezierCurve::Weights
714(TColStd_Array1OfReal& W) const
715{
716
717 Standard_Integer nbpoles = NbPoles();
718 Standard_DimensionError_Raise_if (W.Length() != nbpoles,
719 "Geom2d_BezierCurve::Weights");
720 if (IsRational())
721 W = weights->Array1();
722 else {
723 Standard_Integer i;
724 for (i = 1; i <= nbpoles; i++)
725 W(i) = 1.;
726 }
727}
728
729
730//=======================================================================
731//function : Transform
732//purpose :
733//=======================================================================
734
735void Geom2d_BezierCurve::Transform (const gp_Trsf2d& T)
736{
737 Standard_Integer nbpoles = NbPoles();
738 TColgp_Array1OfPnt2d & cpoles = poles->ChangeArray1();
739
740 for (Standard_Integer i = 1; i <= nbpoles; i++)
741 cpoles (i).Transform(T);
7fd59977 742}
743
744
745//=======================================================================
746//function : Resolution
747//purpose :
748//=======================================================================
749
750void Geom2d_BezierCurve::Resolution(const Standard_Real ToleranceUV,
751 Standard_Real & UTolerance)
752{
753 if(!maxderivinvok){
754 TColStd_Array1OfReal bidflatknots(1, 2*(Degree()+1));
755 for(Standard_Integer i = 1; i <= Degree()+1; i++){
756 bidflatknots(i) = 0.;
757 bidflatknots(i + Degree() +1) = 1.;
758 }
759
760 if (IsRational()) {
761 BSplCLib::Resolution(poles->Array1(),
0e14656b 762 &weights->Array1(),
7fd59977 763 poles->Length(),
764 bidflatknots,
765 Degree(),
766 1.,
767 maxderivinv) ;
768 }
769 else {
770 BSplCLib::Resolution(poles->Array1(),
0e14656b 771 BSplCLib::NoWeights(),
7fd59977 772 poles->Length(),
773 bidflatknots,
774 Degree(),
775 1.,
776 maxderivinv) ;
777 }
778 maxderivinvok = 1;
779 }
780 UTolerance = ToleranceUV * maxderivinv;
781}
782
783
784//=======================================================================
785//function : Copy
786//purpose :
787//=======================================================================
788
789Handle(Geom2d_Geometry) Geom2d_BezierCurve::Copy() const {
790
791 Handle(Geom2d_BezierCurve) C;
792 if (IsRational())
793 C = new Geom2d_BezierCurve (poles->Array1(),weights->Array1());
794 else
795 C = new Geom2d_BezierCurve (poles->Array1());
796 return C;
797}
798
799
800//=======================================================================
801//function : Init
802//purpose :
803//=======================================================================
804
805void Geom2d_BezierCurve::Init
806(const Handle(TColgp_HArray1OfPnt2d)& Poles,
807 const Handle(TColStd_HArray1OfReal)& Weights)
808{
809 Standard_Integer nbpoles = Poles->Length();
810 // closed ?
811 const TColgp_Array1OfPnt2d& cpoles = Poles->Array1();
812 closed = cpoles(1).Distance(cpoles(nbpoles)) <= gp::Resolution();
813
814 // rational
815 rational = !Weights.IsNull();
816
817 // set fields
c8b5b3d8 818 poles = Poles;
819 if (rational)
7fd59977 820 weights = Weights;
7fd59977 821 else
c8b5b3d8 822 weights.Nullify();
7fd59977 823}
824
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