1 // Created on: 1998-08-20
2 // Created by: Philippe MANGIN
3 // Copyright (c) 1998-1999 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 <AdvApprox_ApproxAFunction.hxx>
20 #include <AdvApprox_PrefAndRec.hxx>
21 #include <Approx_Curve3d.hxx>
22 #include <Geom_BSplineCurve.hxx>
23 #include <GeomAdaptor_HCurve.hxx>
26 #include <Precision.hxx>
27 #include <Standard_ConstructionError.hxx>
28 #include <Standard_OutOfRange.hxx>
29 #include <TColgp_Array1OfPnt.hxx>
30 #include <TColStd_HArray1OfReal.hxx>
32 //=======================================================================
33 //class : Approx_Curve3d_Eval
34 //purpose: evaluator class for approximation
35 //=======================================================================
36 class Approx_Curve3d_Eval : public AdvApprox_EvaluatorFunction
39 Approx_Curve3d_Eval (const Handle(Adaptor3d_HCurve)& theFunc,
40 Standard_Real First, Standard_Real Last)
41 : fonct(theFunc) { StartEndSav[0] = First; StartEndSav[1] = Last; }
43 virtual void Evaluate (Standard_Integer *Dimension,
44 Standard_Real StartEnd[2],
45 Standard_Real *Parameter,
46 Standard_Integer *DerivativeRequest,
47 Standard_Real *Result, // [Dimension]
48 Standard_Integer *ErrorCode);
51 Handle(Adaptor3d_HCurve) fonct;
52 Standard_Real StartEndSav[2];
55 void Approx_Curve3d_Eval::Evaluate (Standard_Integer *Dimension,
56 Standard_Real StartEnd[2],
57 Standard_Real *Param, // Parameter at which evaluation
58 Standard_Integer *Order, // Derivative Request
59 Standard_Real *Result,// [Dimension]
60 Standard_Integer *ErrorCode)
63 Standard_Real par = *Param;
65 // Dimension is incorrect
70 if(StartEnd[0] != StartEndSav[0] || StartEnd[1]!= StartEndSav[1])
72 fonct = fonct->Trim(StartEnd[0],StartEnd[1],Precision::PConfusion());
73 StartEndSav[0]=StartEnd[0];
74 StartEndSav[1]=StartEnd[1];
82 pnt = fonct->Value(par);
88 fonct->D1(par, pnt, v1);
94 fonct->D2(par, pnt, v1, v2);
100 Result[0] = Result[1] = Result[2] = 0.;
106 Approx_Curve3d::Approx_Curve3d(const Handle(Adaptor3d_HCurve)& Curve,
107 const Standard_Real Tol3d,
108 const GeomAbs_Shape Order,
109 const Standard_Integer MaxSegments,
110 const Standard_Integer MaxDegree)
112 // Initialisation of input parameters of AdvApprox
114 Standard_Integer Num1DSS=0, Num2DSS=0, Num3DSS=1;
115 Handle(TColStd_HArray1OfReal) OneDTolNul, TwoDTolNul;
116 Handle(TColStd_HArray1OfReal) ThreeDTol =
117 new TColStd_HArray1OfReal(1,Num3DSS);
118 ThreeDTol->Init(Tol3d);
120 Standard_Real First = Curve->FirstParameter();
121 Standard_Real Last = Curve->LastParameter();
123 Standard_Integer NbInterv_C2 = Curve->NbIntervals(GeomAbs_C2);
124 TColStd_Array1OfReal CutPnts_C2(1, NbInterv_C2+1);
125 Curve->Intervals(CutPnts_C2,GeomAbs_C2);
126 Standard_Integer NbInterv_C3 = Curve->NbIntervals(GeomAbs_C3);
127 TColStd_Array1OfReal CutPnts_C3(1, NbInterv_C3+1);
128 Curve->Intervals(CutPnts_C3,GeomAbs_C3);
130 AdvApprox_PrefAndRec CutTool(CutPnts_C2,CutPnts_C3);
134 Approx_Curve3d_Eval ev (Curve, First, Last);
135 AdvApprox_ApproxAFunction aApprox (Num1DSS, Num2DSS, Num3DSS,
136 OneDTolNul, TwoDTolNul, ThreeDTol,
138 MaxDegree, MaxSegments,
141 myIsDone = aApprox.IsDone();
142 myHasResult = aApprox.HasResult();
145 TColgp_Array1OfPnt Poles(1,aApprox.NbPoles());
146 aApprox.Poles(1,Poles);
147 Handle(TColStd_HArray1OfReal) Knots = aApprox.Knots();
148 Handle(TColStd_HArray1OfInteger) Mults = aApprox.Multiplicities();
149 Standard_Integer Degree = aApprox.Degree();
150 myBSplCurve = new Geom_BSplineCurve(Poles, Knots->Array1(), Mults->Array1(), Degree);
151 myMaxError = aApprox.MaxError(3, 1);
155 Handle(Geom_BSplineCurve) Approx_Curve3d::Curve() const
160 Standard_Boolean Approx_Curve3d::IsDone() const
165 Standard_Boolean Approx_Curve3d::HasResult() const
170 Standard_Real Approx_Curve3d::MaxError() const
175 void Approx_Curve3d::Dump(Standard_OStream& o) const
177 o << "******* Dump of ApproxCurve *******" << endl;
178 o << "*******Degree " << Curve()->Degree() << endl;
179 o << "*******NbSegments " << Curve()->NbKnots() - 1 << endl;
180 o << "*******Error " << MaxError() << endl;