1 // Created on: 1997-09-11
2 // Created by: Roman BORISOV
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 <AdvApprox_ApproxAFunction.hxx>
20 #include <AdvApprox_PrefAndRec.hxx>
21 #include <Geom_BSplineCurve.hxx>
22 #include <Geom_Curve.hxx>
23 #include <GeomAdaptor_HCurve.hxx>
24 #include <GeomConvert_ApproxCurve.hxx>
27 #include <Precision.hxx>
28 #include <Standard_ConstructionError.hxx>
29 #include <Standard_OutOfRange.hxx>
30 #include <TColgp_Array1OfPnt.hxx>
31 #include <TColStd_HArray1OfReal.hxx>
33 //=======================================================================
34 //class : GeomConvert_ApproxCurve_Eval
35 //purpose: evaluator class for approximation
36 //=======================================================================
37 class GeomConvert_ApproxCurve_Eval : public AdvApprox_EvaluatorFunction
40 GeomConvert_ApproxCurve_Eval (const Handle(Adaptor3d_HCurve)& theFunc,
41 Standard_Real First, Standard_Real Last)
42 : fonct(theFunc) { StartEndSav[0] = First; StartEndSav[1] = Last; }
44 virtual void Evaluate (Standard_Integer *Dimension,
45 Standard_Real StartEnd[2],
46 Standard_Real *Parameter,
47 Standard_Integer *DerivativeRequest,
48 Standard_Real *Result, // [Dimension]
49 Standard_Integer *ErrorCode);
52 Handle(Adaptor3d_HCurve) fonct;
53 Standard_Real StartEndSav[2];
56 void GeomConvert_ApproxCurve_Eval::Evaluate (Standard_Integer *Dimension,
57 Standard_Real StartEnd[2],
58 Standard_Real *Param, // Parameter at which evaluation
59 Standard_Integer *Order, // Derivative Request
60 Standard_Real *Result,// [Dimension]
61 Standard_Integer *ErrorCode)
64 Standard_Real par = *Param;
66 // Dimension is incorrect
71 if(StartEnd[0] != StartEndSav[0] || StartEnd[1]!= StartEndSav[1])
73 fonct = fonct->Trim(StartEnd[0],StartEnd[1],Precision::PConfusion());
74 StartEndSav[0]=StartEnd[0];
75 StartEndSav[1]=StartEnd[1];
83 pnt = fonct->Value(par);
89 fonct->D1(par, pnt, v1);
95 fonct->D2(par, pnt, v1, v2);
101 Result[0] = Result[1] = Result[2] = 0.;
107 GeomConvert_ApproxCurve::GeomConvert_ApproxCurve(const Handle(Geom_Curve)& Curve,const Standard_Real Tol3d,const GeomAbs_Shape Order,const Standard_Integer MaxSegments,const Standard_Integer MaxDegree)
109 Handle(GeomAdaptor_HCurve) HCurve = new GeomAdaptor_HCurve (Curve);
110 Approximate(HCurve, Tol3d, Order, MaxSegments, MaxDegree);
113 GeomConvert_ApproxCurve::GeomConvert_ApproxCurve(const Handle(Adaptor3d_HCurve)& Curve,const Standard_Real Tol3d,const GeomAbs_Shape Order,const Standard_Integer MaxSegments,const Standard_Integer MaxDegree)
115 Approximate(Curve, Tol3d, Order, MaxSegments, MaxDegree);
118 void GeomConvert_ApproxCurve::Approximate(
119 const Handle(Adaptor3d_HCurve)& theCurve,
120 const Standard_Real theTol3d,
121 const GeomAbs_Shape theOrder,
122 const Standard_Integer theMaxSegments,
123 const Standard_Integer theMaxDegree)
125 // Initialisation of input parameters of AdvApprox
127 Standard_Integer Num1DSS=0, Num2DSS=0, Num3DSS=1;
128 Handle(TColStd_HArray1OfReal) OneDTolNul, TwoDTolNul;
129 Handle(TColStd_HArray1OfReal) ThreeDTol = new TColStd_HArray1OfReal(1,Num3DSS);
130 ThreeDTol->Init(theTol3d);
132 Standard_Real First = theCurve->FirstParameter();
133 Standard_Real Last = theCurve->LastParameter();
135 Standard_Integer NbInterv_C2 = theCurve->NbIntervals(GeomAbs_C2);
136 TColStd_Array1OfReal CutPnts_C2(1, NbInterv_C2+1);
137 theCurve->Intervals(CutPnts_C2,GeomAbs_C2);
138 Standard_Integer NbInterv_C3 = theCurve->NbIntervals(GeomAbs_C3);
139 TColStd_Array1OfReal CutPnts_C3(1, NbInterv_C3+1);
140 theCurve->Intervals(CutPnts_C3,GeomAbs_C3);
142 AdvApprox_PrefAndRec CutTool(CutPnts_C2,CutPnts_C3);
146 GeomConvert_ApproxCurve_Eval ev (theCurve, First, Last);
147 AdvApprox_ApproxAFunction aApprox (Num1DSS, Num2DSS, Num3DSS,
148 OneDTolNul, TwoDTolNul, ThreeDTol,
149 First, Last, theOrder,
150 theMaxDegree, theMaxSegments,
153 myIsDone = aApprox.IsDone();
154 myHasResult = aApprox.HasResult();
157 TColgp_Array1OfPnt Poles(1,aApprox.NbPoles());
158 aApprox.Poles(1,Poles);
159 Handle(TColStd_HArray1OfReal) Knots = aApprox.Knots();
160 Handle(TColStd_HArray1OfInteger) Mults = aApprox.Multiplicities();
161 Standard_Integer Degree = aApprox.Degree();
162 myBSplCurve = new Geom_BSplineCurve(Poles, Knots->Array1(), Mults->Array1(), Degree);
163 myMaxError = aApprox.MaxError(3, 1);
167 Handle(Geom_BSplineCurve) GeomConvert_ApproxCurve::Curve() const
172 Standard_Boolean GeomConvert_ApproxCurve::IsDone() const
177 Standard_Boolean GeomConvert_ApproxCurve::HasResult() const
182 Standard_Real GeomConvert_ApproxCurve::MaxError() const
187 void GeomConvert_ApproxCurve::Dump(Standard_OStream& o) const
189 o << "******* Dump of ApproxCurve *******" << endl;
190 o << "*******Error " << MaxError() << endl;