1 // Created on: 1997-12-19
2 // Created by: Roman BORISOV /Philippe MANGIN
3 // Copyright (c) 1997-1999 Matra Datavision
4 // Copyright (c) 1999-2014 OPEN CASCADE SAS
6 // This file is part of Open CASCADE Technology software library.
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
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.
14 // Alternatively, this file may be used under the terms of Open CASCADE
15 // commercial license or contractual agreement.
18 #include <Adaptor3d_HCurve.hxx>
19 #include <Bnd_Box.hxx>
20 #include <BndLib_Add3dCurve.hxx>
21 #include <Geom_BezierCurve.hxx>
22 #include <Geom_BSplineCurve.hxx>
23 #include <Geom_Plane.hxx>
24 #include <GeomAbs_CurveType.hxx>
25 #include <GeomFill_CorrectedFrenet.hxx>
26 #include <GeomFill_Frenet.hxx>
27 #include <GeomFill_SnglrFunc.hxx>
28 #include <GeomFill_TrihedronLaw.hxx>
29 #include <GeomLib.hxx>
30 #include <gp_Trsf.hxx>
32 #include <gp_Vec2d.hxx>
33 #include <Law_BSpFunc.hxx>
34 #include <Law_BSpline.hxx>
35 #include <Law_Composite.hxx>
36 #include <Law_Constant.hxx>
37 #include <Law_Function.hxx>
38 #include <Law_Interpolate.hxx>
39 #include <Precision.hxx>
40 #include <Standard_ConstructionError.hxx>
41 #include <Standard_OutOfRange.hxx>
42 #include <Standard_Type.hxx>
43 #include <TColgp_HArray1OfPnt.hxx>
44 #include <TColStd_HArray1OfReal.hxx>
45 #include <TColStd_SequenceOfReal.hxx>
50 static Standard_Boolean Affich=0;
54 static Standard_Integer CorrNumber = 0;
55 #include <Draw_Appli.hxx>
56 #include <DrawTrSurf.hxx>
57 #include <Draw_Segment2D.hxx>
59 #include <TColgp_Array1OfPnt.hxx>
60 #include <TColStd_Array1OfReal.hxx>
61 #include <TColStd_HArray1OfInteger.hxx>
65 static void draw(const Handle(Law_Function)& law)
67 Standard_Real Step, u, v, tmin;
68 Standard_Integer NbInt, i, j, jmax;
69 NbInt = law->NbIntervals(GeomAbs_C3);
70 TColStd_Array1OfReal Int(1, NbInt+1);
71 law->Intervals(Int, GeomAbs_C3);
73 Handle(Draw_Segment2D) tg2d;
75 for(i = 1; i <= NbInt; i++){
77 Step = (Int(i+1)-Int(i))/4;
78 if (i == NbInt) jmax = 4;
80 for (j=1; j<=jmax; j++) {
81 u = tmin + (j-1)*Step;
83 gp_Pnt2d point2d(u,v);
85 tg2d = new Draw_Segment2D(old, point2d,Draw_kaki);
96 static Standard_Real ComputeTorsion(const Standard_Real Param,
97 const Handle(Adaptor3d_HCurve)& aCurve)
99 Standard_Real Torsion;
102 gp_Vec DC1, DC2, DC3;
103 aCurve->D3(Param, aPoint, DC1, DC2, DC3);
104 gp_Vec DC1crossDC2 = DC1 ^ DC2;
105 Standard_Real Norm_DC1crossDC2 = DC1crossDC2.Magnitude();
107 Standard_Real DC1DC2DC3 = DC1crossDC2 * DC3 ; //mixed product
109 Standard_Real Tol = gp::Resolution();
110 Standard_Real SquareNorm_DC1crossDC2 = Norm_DC1crossDC2 * Norm_DC1crossDC2;
111 if (SquareNorm_DC1crossDC2 <= Tol)
114 Torsion = DC1DC2DC3 / SquareNorm_DC1crossDC2 ;
119 //===============================================================
120 // Function : smoothlaw
121 // Purpose : to smooth a law : Reduce the number of knots
122 //===============================================================
123 static void smoothlaw(Handle(Law_BSpline)& Law,
124 const Handle(TColStd_HArray1OfReal)& Points,
125 const Handle(TColStd_HArray1OfReal)& Param,
126 const Standard_Real Tol)
128 Standard_Real tol, d;
129 Standard_Integer ii, Nbk;
130 Standard_Boolean B, Ok;
131 Handle(Law_BSpline) BS = Law->Copy();
137 for (ii=Nbk-1; ii>1; ii--) { // Une premiere passe tolerance serres
138 B = BS->RemoveKnot(ii, 0, tol);
139 if (B) Ok = Standard_True;
142 if (Ok) { // controle
144 for (ii=1; ii<=Param->Length() && Ok; ii++) {
145 d = Abs(BS->Value(Param->Value(ii))-Points->Value(ii));
146 if (d > tol) tol = d;
153 cout << "smooth law echec" << endl;
165 Ok = Standard_False; // Une deuxieme passe tolerance desserre
167 for (ii=Nbk-1; ii>1; ii--) {
168 B = BS->RemoveKnot(ii, 0, tol);
169 if (B) Ok = Standard_True;
172 if (Ok) { // controle
174 for (ii=1; ii<=Param->Length() && Ok; ii++) {
175 d = Abs(BS->Value(Param->Value(ii))-Points->Value(ii));
176 if (d > tol) tol = d;
181 cout << "smooth law echec" << endl;
189 cout << "Knots Law : " << endl;
190 for (ii=1; ii<=BS->NbKnots(); ii++) {
191 cout << ii << " : " << BS->Knot(ii) << endl;
197 //===============================================================
198 // Function : FindPlane
200 //===============================================================
201 static Standard_Boolean FindPlane ( const Handle(Adaptor3d_HCurve)& c,
202 Handle( Geom_Plane )& P )
204 Standard_Boolean found = Standard_True;
205 Handle(TColgp_HArray1OfPnt) TabP;
207 switch (c->GetType()) {
211 found = Standard_False;
216 P = new Geom_Plane(gp_Ax3(c->Circle().Position()));
219 case GeomAbs_Ellipse:
220 P = new Geom_Plane(gp_Ax3(c->Ellipse().Position()));
223 case GeomAbs_Hyperbola:
224 P = new Geom_Plane(gp_Ax3(c->Hyperbola().Position()));
227 case GeomAbs_Parabola:
228 P = new Geom_Plane(gp_Ax3(c->Parabola().Position()));
231 case GeomAbs_BezierCurve:
233 Handle(Geom_BezierCurve) GC = c->Bezier();
234 Standard_Integer nbp = GC->NbPoles();
236 found = Standard_False;
237 else if ( nbp == 2) {
238 found = Standard_False;
241 TabP = new (TColgp_HArray1OfPnt) (1, nbp);
242 GC->Poles(TabP->ChangeArray1());
247 case GeomAbs_BSplineCurve:
249 Handle(Geom_BSplineCurve) GC = c->BSpline();
250 Standard_Integer nbp = GC->NbPoles();
252 found = Standard_False;
253 else if ( nbp == 2) {
254 found = Standard_False;
257 TabP = new (TColgp_HArray1OfPnt) (1, nbp);
258 GC->Poles(TabP->ChangeArray1());
264 { // On utilise un echantillonage
265 Standard_Integer nbp = 15 + c->NbIntervals(GeomAbs_C3);
266 Standard_Real f, l, t, inv;
268 f = c->FirstParameter();
269 l = c->LastParameter();
271 for (ii=1; ii<=nbp; ii++) {
272 t = ( f*(nbp-ii) + l*(ii-1));
274 TabP->SetValue(ii, c->Value(t));
279 if (! TabP.IsNull()) { // Recherche d'un plan moyen et controle
280 Standard_Boolean issingular;
282 GeomLib::AxeOfInertia(TabP->Array1(), inertia, issingular);
284 found = Standard_False;
287 P = new Geom_Plane(inertia);
291 //control = Controle(TabP->Array1(), P, myTolerance);
292 // Standard_Boolean isOnPlane;
293 Standard_Real a,b,c,d, dist;
295 P->Coefficients(a,b,c,d);
296 for (ii=1; ii<=TabP->Length() && found; ii++) {
297 const gp_XYZ& xyz = TabP->Value(ii).XYZ();
298 dist = a*xyz.X() + b*xyz.Y() + c*xyz.Z() + d;
299 found = (Abs(dist) <= Precision::Confusion());
308 //===============================================================
309 // Function : Constructor
311 //===============================================================
312 GeomFill_CorrectedFrenet::GeomFill_CorrectedFrenet()
313 : isFrenet(Standard_False)
315 frenet = new GeomFill_Frenet();
316 myForEvaluation = Standard_False;
319 //===============================================================
320 // Function : Constructor
322 //===============================================================
323 GeomFill_CorrectedFrenet::GeomFill_CorrectedFrenet(const Standard_Boolean ForEvaluation)
324 : isFrenet(Standard_False)
326 frenet = new GeomFill_Frenet();
327 myForEvaluation = ForEvaluation;
330 Handle(GeomFill_TrihedronLaw) GeomFill_CorrectedFrenet::Copy() const
332 Handle(GeomFill_CorrectedFrenet) copy = new (GeomFill_CorrectedFrenet)();
333 if (!myCurve.IsNull()) copy->SetCurve(myCurve);
337 void GeomFill_CorrectedFrenet::SetCurve(const Handle(Adaptor3d_HCurve)& C)
340 GeomFill_TrihedronLaw::SetCurve(C);
344 GeomAbs_CurveType type;
348 case GeomAbs_Ellipse:
349 case GeomAbs_Hyperbola:
350 case GeomAbs_Parabola:
353 // No probleme isFrenet
354 isFrenet = Standard_True;
359 // We have to search singulaties
360 isFrenet = Standard_True;
368 //===============================================================
370 // Purpose : Compute angle's law
371 //===============================================================
372 void GeomFill_CorrectedFrenet::Init()
374 EvolAroundT = new Law_Composite();
375 Standard_Integer NbI = frenet->NbIntervals(GeomAbs_C0), i;
376 TColStd_Array1OfReal T(1, NbI + 1);
377 frenet->Intervals(T, GeomAbs_C0);
378 Handle(Law_Function) Func;
380 TColStd_SequenceOfReal SeqPoles, SeqAngle;
381 TColgp_SequenceOfVec SeqTangent, SeqNormal;
383 gp_Vec Tangent, Normal, BN;
384 frenet->D0(myTrimmed->FirstParameter(), Tangent, Normal, BN);
385 Standard_Integer NbStep;
386 // Standard_Real StartAng = 0, AvStep, Step, t;
387 Standard_Real StartAng = 0, AvStep, Step;
392 if (Affich) { // Display the curve C'^C''(t)
393 GeomFill_SnglrFunc CS(myCurve);
395 AvStep = (myTrimmed->LastParameter() -
396 myTrimmed->FirstParameter())/NbStep;
397 TColgp_Array1OfPnt TabP(1, NbStep+1);
399 TColStd_Array1OfReal TI(1, NbStep+1);
400 TColStd_Array1OfInteger M(1,NbStep+1);
402 M(1) = M(NbStep+1) = 2;
403 for (i=1; i<=NbStep+1; i++) {
404 t = (myTrimmed->FirstParameter()+ (i-1)*AvStep);
409 Standard_CString name = tname ;
410 sprintf(name,"Binorm_%d", ++CorrNumber);
411 Handle(Geom_BSplineCurve) BS = new
412 (Geom_BSplineCurve) (TabP, TI, M, 1);
413 // DrawTrSurf::Set(&name[0], BS);
414 DrawTrSurf::Set(name, BS);
420 AvStep = (myTrimmed->LastParameter() - myTrimmed->FirstParameter())/NbStep;
421 for(i = 1; i <= NbI; i++) {
422 NbStep = Max(Standard_Integer((T(i+1) - T(i))/AvStep), 3);
423 Step = (T(i+1) - T(i))/NbStep;
424 if(!InitInterval(T(i), T(i+1), Step, StartAng, Tangent, Normal, AT, AN, Func,
425 SeqPoles, SeqAngle, SeqTangent, SeqNormal))
428 isFrenet = Standard_False;
430 Handle(Law_Composite)::DownCast(EvolAroundT)->ChangeLaws().Append(Func);
432 if(myTrimmed->IsPeriodic())
433 Handle(Law_Composite)::DownCast(EvolAroundT)->SetPeriodic();
437 Standard_Integer iEnd = SeqPoles.Length();
438 HArrPoles = new TColStd_HArray1OfReal(1, iEnd);
439 HArrAngle = new TColStd_HArray1OfReal(1, iEnd);
440 HArrTangent = new TColgp_HArray1OfVec(1, iEnd);
441 HArrNormal = new TColgp_HArray1OfVec(1, iEnd);
442 for(i = 1; i <= iEnd; i++){
443 HArrPoles->ChangeValue(i) = SeqPoles(i);
444 HArrAngle->ChangeValue(i) = SeqAngle(i);
445 HArrTangent->ChangeValue(i) = SeqTangent(i);
446 HArrNormal->ChangeValue(i) = SeqNormal(i);
456 //===============================================================
457 // Function : InitInterval
458 // Purpose : Compute the angle law on a span
459 //===============================================================
460 Standard_Boolean GeomFill_CorrectedFrenet::
461 InitInterval(const Standard_Real First, const Standard_Real Last,
462 const Standard_Real Step,
463 Standard_Real& startAng, gp_Vec& prevTangent,
464 gp_Vec& prevNormal, gp_Vec& aT, gp_Vec& aN,
465 Handle(Law_Function)& FuncInt,
466 TColStd_SequenceOfReal& SeqPoles,
467 TColStd_SequenceOfReal& SeqAngle,
468 TColgp_SequenceOfVec& SeqTangent,
469 TColgp_SequenceOfVec& SeqNormal) const
472 gp_Vec Tangent, Normal, BN, cross;
473 TColStd_SequenceOfReal parameters;
474 TColStd_SequenceOfReal EvolAT;
475 Standard_Real Param = First, L, norm;
476 Standard_Boolean isZero = Standard_True, isConst = Standard_True;
477 const Standard_Real minnorm = 1.e-16;
482 frenet->SetInterval(First, Last); //To have the rigth evaluation at bounds
483 GeomFill_SnglrFunc CS(myCurve);
484 BndLib_Add3dCurve::Add(CS, First, Last, 1.e-2, Boite);
486 aT = gp_Vec(0, 0, 0);
487 aN = gp_Vec(0, 0, 0);
489 Standard_Real angleAT = 0., currParam, currStep = Step;
491 Handle( Geom_Plane ) aPlane;
492 Standard_Boolean isPlanar = Standard_False;
493 if (!myForEvaluation)
494 isPlanar = FindPlane( myCurve, aPlane );
498 Standard_Real DLast = Last - Precision::PConfusion();
500 while (Param < Last) {
501 if (currParam > DLast) {
502 currStep = DLast - Param;
508 frenet->D0(currParam, Tangent, Normal, BN);
509 if (prevTangent.Angle(Tangent) < M_PI/3 || i == 1) {
510 parameters.Append(currParam);
512 SeqPoles.Append(Param);
513 SeqAngle.Append(i > 1? EvolAT(i-1) : startAng);
514 SeqTangent.Append(prevTangent);
515 SeqNormal.Append(prevNormal);
516 angleAT = CalcAngleAT(Tangent,Normal,prevTangent,prevNormal);
519 if(Abs(angleAT) > Precision::PConfusion())
520 isConst = Standard_False;
522 angleAT += (i > 1) ? EvolAT(i-1) : startAng;
523 EvolAT.Append(angleAT);
527 if(Abs(angleAT) > Precision::PConfusion())
528 isZero = Standard_False;
531 cross = Tangent.Crossed(Normal);
532 aN.SetLinearForm(Sin(angleAT), cross,
533 1 - Cos(angleAT), Tangent.Crossed(cross),
535 prevTangent = Tangent;
539 //Evaluate the Next step
540 CS.D1(Param, PonC, D1);
542 L = PonC.XYZ().Modulus()/2;
543 norm = D1.Magnitude();
544 if (norm <= gp::Resolution())
546 //norm = 2.*gp::Resolution();
550 if (currStep <= gp::Resolution()) //L = 0 => curvature = 0, linear segment
552 if (currStep < Precision::Confusion()) //too small step
553 currStep = Precision::Confusion();
554 if (currStep > Step) //too big step
555 currStep = Step;//default value
558 currStep /= 2; // Step too long !
560 currParam = Param + currStep;
565 aT /= parameters.Length() - 1;
566 aN /= parameters.Length() - 1;
571 if (isConst || isPlanar) {
572 FuncInt = new Law_Constant();
573 Handle(Law_Constant)::DownCast(FuncInt)->Set( angleAT, First, Last );
577 Standard_Integer Length = parameters.Length();
578 Handle(TColStd_HArray1OfReal) pararr =
579 new TColStd_HArray1OfReal(1, Length);
580 Handle(TColStd_HArray1OfReal) angleATarr =
581 new TColStd_HArray1OfReal(1, Length);
584 for (i = 1; i <= Length; i++) {
585 pararr->ChangeValue(i) = parameters(i);
586 angleATarr->ChangeValue(i) = EvolAT(i);
591 cout<<"NormalEvolution"<<endl;
592 for (i = 1; i <= Length; i++) {
593 cout<<"("<<pararr->Value(i)<<", "<<angleATarr->Value(i)<<")" << endl;
599 Law_Interpolate lawAT(angleATarr, pararr,
600 Standard_False, Precision::PConfusion());
602 Handle(Law_BSpline) BS = lawAT.Curve();
603 smoothlaw(BS, angleATarr, pararr, 0.1);
605 FuncInt = new Law_BSpFunc(BS, First, Last);
609 //===============================================================
610 // Function : CalcAngleAT (OCC78)
611 // Purpose : Calculate angle of rotation of trihedron normal and its derivatives relative
612 // at any position on his curve
613 //===============================================================
614 Standard_Real GeomFill_CorrectedFrenet::CalcAngleAT(const gp_Vec& Tangent, const gp_Vec& Normal,
615 const gp_Vec& prevTangent, const gp_Vec& prevNormal) const
618 gp_Vec Normal_rot, cross;
619 angle = Tangent.Angle(prevTangent);
620 if (Abs(angle) > Precision::Angular()) {
621 cross = Tangent.Crossed(prevTangent).Normalized();
622 Normal_rot = Normal + sin(angle)*cross.Crossed(Normal) +
623 (1 - cos(angle))*cross.Crossed(cross.Crossed(Normal));
627 Standard_Real angleAT = Normal_rot.Angle(prevNormal);
628 if(angleAT > Precision::Angular() && M_PI - angleAT > Precision::Angular())
629 if (Normal_rot.Crossed(prevNormal).IsOpposite(prevTangent, Precision::Angular()))
633 //===============================================================
634 // Function : ... (OCC78)
635 // Purpose : This family of functions produce conversion of angle utility
636 //===============================================================
637 static Standard_Real corr2PI_PI(Standard_Real Ang){
638 return Ang = (Ang < M_PI? Ang: Ang-2*M_PI);
640 static Standard_Real diffAng(Standard_Real A, Standard_Real Ao){
641 Standard_Real dA = (A-Ao) - Floor((A-Ao)/2.0/M_PI)*2.0*M_PI;
642 return dA = dA >= 0? corr2PI_PI(dA): -corr2PI_PI(-dA);
644 //===============================================================
645 // Function : CalcAngleAT (OCC78)
646 // Purpose : Calculate angle of rotation of trihedron normal and its derivatives relative
647 // at any position on his curve
648 //===============================================================
649 Standard_Real GeomFill_CorrectedFrenet::GetAngleAT(const Standard_Real Param) const{
650 // Search index of low margin from poles of TLaw by bisection method
651 Standard_Integer iB = 1, iE = HArrPoles->Length(), iC = (iE+iB)/2;
652 if(Param == HArrPoles->Value(iB)) return TLaw->Value(Param);
653 if(Param > HArrPoles->Value(iE)) iC = iE;
655 while(!(HArrPoles->Value(iC) <= Param && Param <= HArrPoles->Value(iC+1))){
656 if(HArrPoles->Value(iC) < Param) iB = iC; else iE = iC;
659 if(HArrPoles->Value(iC) == Param || Param == HArrPoles->Value(iC+1)) return TLaw->Value(Param);
661 // Calculate differenciation between apporoximated and local values of AngleAT
662 Standard_Real AngP = TLaw->Value(Param), AngPo = HArrAngle->Value(iC), dAng = AngP - AngPo;
663 gp_Vec Tangent, Normal, BN;
664 frenet->D0(Param, Tangent, Normal, BN);
665 Standard_Real DAng = CalcAngleAT(Tangent, Normal, HArrTangent->Value(iC), HArrNormal->Value(iC));
666 Standard_Real DA = diffAng(DAng,dAng);
667 // The correction (there is core of OCC78 bug)
668 if(Abs(DA) > M_PI/2.0){
673 //===============================================================
676 //===============================================================
677 Standard_Boolean GeomFill_CorrectedFrenet::D0(const Standard_Real Param,
682 frenet->D0(Param, Tangent, Normal, BiNormal);
683 if (isFrenet) return Standard_True;
685 Standard_Real angleAT;
686 //angleAT = TLaw->Value(Param);
687 angleAT = GetAngleAT(Param); //OCC78
689 // rotation around Tangent
691 cross = Tangent.Crossed(Normal);
692 Normal.SetLinearForm(Sin(angleAT), cross,
693 (1 - Cos(angleAT)), Tangent.Crossed(cross),
695 BiNormal = Tangent.Crossed(Normal);
697 return Standard_True;
700 //===============================================================
703 //===============================================================
705 Standard_Boolean GeomFill_CorrectedFrenet::D1(const Standard_Real Param,
713 frenet->D1(Param, Tangent, DTangent, Normal, DNormal, BiNormal, DBiNormal);
714 if (isFrenet) return Standard_True;
716 Standard_Real angleAT, d_angleAT;
717 Standard_Real sina, cosa;
719 TLaw->D1(Param, angleAT, d_angleAT);
720 angleAT = GetAngleAT(Param); //OCC78
722 gp_Vec cross, dcross, tcross, dtcross, aux;
726 cross = Tangent.Crossed(Normal);
727 dcross.SetLinearForm(1, DTangent.Crossed(Normal),
728 Tangent.Crossed(DNormal));
730 tcross = Tangent.Crossed(cross);
731 dtcross.SetLinearForm(1, DTangent.Crossed(cross),
732 Tangent.Crossed(dcross));
734 aux.SetLinearForm(sina, dcross,
735 cosa*d_angleAT, cross);
736 aux.SetLinearForm(1 - cosa, dtcross,
737 sina*d_angleAT, tcross,
741 Normal.SetLinearForm( sina, cross,
745 BiNormal = Tangent.Crossed(Normal);
747 DBiNormal.SetLinearForm(1, DTangent.Crossed(Normal),
748 Tangent.Crossed(DNormal));
751 /* gp_Vec FDN, Tf, Nf, BNf;
754 if (Param + h > myTrimmed->LastParameter()) h = -h;
755 D0(Param + h, Tf, Nf, BNf);
756 FDN = (Nf - Normal)/h;
757 cout<<"Param = "<<Param<<endl;
758 cout<<"DN = ("<<DNormal.X()<<", "<<DNormal.Y()<<", "<<DNormal.Z()<<")"<<endl;
759 cout<<"FDN = ("<<FDN.X()<<", "<<FDN.Y()<<", "<<FDN.Z()<<")"<<endl;
762 return Standard_True;
765 //===============================================================
768 //===============================================================
769 Standard_Boolean GeomFill_CorrectedFrenet::D2(const Standard_Real Param,
780 frenet->D2(Param, Tangent, DTangent, D2Tangent,
781 Normal, DNormal, D2Normal,
782 BiNormal, DBiNormal, D2BiNormal);
783 if (isFrenet) return Standard_True;
785 Standard_Real angleAT, d_angleAT, d2_angleAT;
786 Standard_Real sina, cosa;
787 TLaw->D2(Param, angleAT, d_angleAT, d2_angleAT);
788 angleAT = GetAngleAT(Param); //OCC78
790 gp_Vec cross, dcross, d2cross, tcross, dtcross, d2tcross, aux;
793 cross = Tangent.Crossed(Normal);
794 dcross.SetLinearForm(1, DTangent.Crossed(Normal),
795 Tangent.Crossed(DNormal));
796 d2cross.SetLinearForm(1, D2Tangent.Crossed(Normal),
797 2, DTangent.Crossed(DNormal),
798 Tangent.Crossed(D2Normal));
801 tcross = Tangent.Crossed(cross);
802 dtcross.SetLinearForm(1, DTangent.Crossed(cross),
803 Tangent.Crossed(dcross));
804 d2tcross.SetLinearForm(1, D2Tangent.Crossed(cross),
805 2, DTangent.Crossed(dcross),
806 Tangent.Crossed(d2cross));
809 aux.SetLinearForm(sina, d2cross,
810 2*cosa*d_angleAT, dcross,
811 cosa*d2_angleAT - sina*d_angleAT*d_angleAT, cross);
813 aux.SetLinearForm(1 - cosa, d2tcross,
814 2*sina*d_angleAT, dtcross,
815 cosa*d_angleAT*d_angleAT + sina*d2_angleAT, tcross,
819 /* D2Normal += sina*(D2Tangent.Crossed(Normal) + 2*DTangent.Crossed(DNormal) + Tangent.Crossed(D2Normal)) +
820 2*cosa*d_angleAT*(DTangent.Crossed(Normal) + Tangent.Crossed(DNormal)) +
821 (cosa*d2_angleAT - sina*d_angleAT*d_angleAT)*Tangent.Crossed(Normal) +
822 2*sina*d_angleAT*(DTangent.Crossed(Tangent.Crossed(Normal)) + Tangent.Crossed(DTangent.Crossed(Normal)) + Tangent.Crossed(Tangent.Crossed(DNormal))) +
823 (1 - cosa)*(D2Tangent.Crossed(Tangent.Crossed(Normal)) + Tangent.Crossed(D2Tangent.Crossed(Normal)) + Tangent.Crossed(Tangent.Crossed(D2Normal)) + 2*DTangent.Crossed(DTangent.Crossed(Normal)) + 2*DTangent.Crossed(Tangent.Crossed(DNormal)) + 2*Tangent.Crossed(DTangent.Crossed(DNormal)))
825 (cosa*d_angleAT*d_angleAT + sina*d2_angleAT)*Tangent.Crossed(Tangent.Crossed(Normal));*/
828 aux.SetLinearForm(sina, dcross,
829 cosa*d_angleAT, cross);
830 aux.SetLinearForm(1 - cosa, dtcross,
831 sina*d_angleAT, tcross,
836 Normal.SetLinearForm( sina, cross,
840 BiNormal = Tangent.Crossed(Normal);
842 DBiNormal.SetLinearForm(1, DTangent.Crossed(Normal),
843 Tangent.Crossed(DNormal));
845 D2BiNormal.SetLinearForm(1, D2Tangent.Crossed(Normal),
846 2, DTangent.Crossed(DNormal),
847 Tangent.Crossed(D2Normal));
850 /* gp_Vec FD2N, FD2T, FD2BN, Tf, DTf, Nf, DNf, BNf, DBNf;
853 if (Param + h > myTrimmed->LastParameter()) h = -h;
854 D1(Param + h, Tf, DTf, Nf, DNf, BNf, DBNf);
855 FD2N = (DNf - DNormal)/h;
856 FD2T = (DTf - DTangent)/h;
857 FD2BN = (DBNf - DBiNormal)/h;
858 cout<<"Param = "<<Param<<endl;
859 cout<<"D2N = ("<<D2Normal.X()<<", "<<D2Normal.Y()<<", "<<D2Normal.Z()<<")"<<endl;
860 cout<<"FD2N = ("<<FD2N.X()<<", "<<FD2N.Y()<<", "<<FD2N.Z()<<")"<<endl<<endl;
861 cout<<"D2T = ("<<D2Tangent.X()<<", "<<D2Tangent.Y()<<", "<<D2Tangent.Z()<<")"<<endl;
862 cout<<"FD2T = ("<<FD2T.X()<<", "<<FD2T.Y()<<", "<<FD2T.Z()<<")"<<endl<<endl;
863 cout<<"D2BN = ("<<D2BiNormal.X()<<", "<<D2BiNormal.Y()<<", "<<D2BiNormal.Z()<<")"<<endl;
864 cout<<"FD2BN = ("<<FD2BN.X()<<", "<<FD2BN.Y()<<", "<<FD2BN.Z()<<")"<<endl<<endl;
867 return Standard_True;
870 //===============================================================
871 // Function : NbIntervals
873 //===============================================================
874 Standard_Integer GeomFill_CorrectedFrenet::NbIntervals(const GeomAbs_Shape S) const
876 Standard_Integer NbFrenet, NbLaw;
877 NbFrenet = frenet->NbIntervals(S);
878 if (isFrenet) return NbFrenet;
880 NbLaw = EvolAroundT->NbIntervals(S);
884 TColStd_Array1OfReal FrenetInt(1, NbFrenet + 1);
885 TColStd_Array1OfReal LawInt(1, NbLaw + 1);
886 TColStd_SequenceOfReal Fusion;
888 frenet->Intervals(FrenetInt, S);
889 EvolAroundT->Intervals(LawInt, S);
890 GeomLib::FuseIntervals(FrenetInt, LawInt, Fusion);
892 return Fusion.Length()-1;
895 //===============================================================
896 // Function : Intervals
898 //===============================================================
899 void GeomFill_CorrectedFrenet::Intervals(TColStd_Array1OfReal& T,
900 const GeomAbs_Shape S) const
902 Standard_Integer NbFrenet, NbLaw;
904 frenet->Intervals(T, S);
908 NbFrenet = frenet->NbIntervals(S);
910 EvolAroundT->Intervals(T, S);
913 NbLaw = EvolAroundT->NbIntervals(S);
915 TColStd_Array1OfReal FrenetInt(1, NbFrenet + 1);
916 TColStd_Array1OfReal LawInt(1, NbLaw + 1);
917 TColStd_SequenceOfReal Fusion;
919 frenet->Intervals(FrenetInt, S);
920 EvolAroundT->Intervals(LawInt, S);
921 GeomLib::FuseIntervals(FrenetInt, LawInt, Fusion);
923 for(Standard_Integer i = 1; i <= Fusion.Length(); i++)
924 T.ChangeValue(i) = Fusion.Value(i);
927 //===============================================================
928 // Function : SetInterval
930 //===============================================================
931 void GeomFill_CorrectedFrenet::SetInterval(const Standard_Real First,
932 const Standard_Real Last)
934 GeomFill_TrihedronLaw::SetInterval(First, Last);
935 frenet->SetInterval(First, Last);
936 if (!isFrenet) TLaw = EvolAroundT->Trim(First, Last,
937 Precision::PConfusion()/2);
940 //===============================================================
941 // Function : EvaluateBestMode
943 //===============================================================
944 GeomFill_Trihedron GeomFill_CorrectedFrenet::EvaluateBestMode()
946 if (EvolAroundT.IsNull())
947 return GeomFill_IsFrenet; //Frenet
949 const Standard_Real MaxAngle = 3.*M_PI/4.;
950 const Standard_Real MaxTorsion = 100.;
952 Standard_Real Step, u, v, tmin, tmax;
953 Standard_Integer NbInt, i, j, k = 1;
954 NbInt = EvolAroundT->NbIntervals(GeomAbs_CN);
955 TColStd_Array1OfReal Int(1, NbInt+1);
956 EvolAroundT->Intervals(Int, GeomAbs_CN);
958 gp_Vec2d aVec, PrevVec;
960 Standard_Integer NbSamples = 10;
961 for(i = 1; i <= NbInt; i++){
964 Standard_Real Torsion = ComputeTorsion(tmin, myTrimmed);
965 if (Abs(Torsion) > MaxTorsion)
966 return GeomFill_IsDiscreteTrihedron; //DiscreteTrihedron
968 Handle(Law_Function) trimmedlaw = EvolAroundT->Trim(tmin, tmax, Precision::PConfusion()/2);
969 Step = (Int(i+1)-Int(i))/NbSamples;
970 for (j = 0; j <= NbSamples; j++) {
972 v = trimmedlaw->Value(u);
973 gp_Pnt2d point2d(u,v);
976 aVec.SetXY(point2d.XY() - old.XY());
979 Standard_Real theAngle = PrevVec.Angle(aVec);
980 if (Abs(theAngle) > MaxAngle)
981 return GeomFill_IsDiscreteTrihedron; //DiscreteTrihedron
990 return GeomFill_IsCorrectedFrenet; //CorrectedFrenet
993 //===============================================================
994 // Function : GetAverageLaw
996 //===============================================================
997 void GeomFill_CorrectedFrenet::GetAverageLaw(gp_Vec& ATangent,
1001 if (isFrenet) frenet->GetAverageLaw(ATangent, ANormal, ABiNormal);
1005 ABiNormal = ATangent;
1006 ABiNormal.Cross(ANormal);
1010 //===============================================================
1011 // Function : IsConstant
1013 //===============================================================
1014 Standard_Boolean GeomFill_CorrectedFrenet::IsConstant() const
1016 return (myCurve->GetType() == GeomAbs_Line);
1019 //===============================================================
1020 // Function : IsOnlyBy3dCurve
1022 //===============================================================
1023 Standard_Boolean GeomFill_CorrectedFrenet::IsOnlyBy3dCurve() const
1025 return Standard_True;