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.
17 #include <GeomConvert_ApproxCurve.ixx>
20 #include <GeomAdaptor_HCurve.hxx>
21 #include <TColStd_HArray1OfReal.hxx>
22 #include <AdvApprox_PrefAndRec.hxx>
23 #include <AdvApprox_ApproxAFunction.hxx>
24 #include <TColgp_Array1OfPnt.hxx>
25 #include <Precision.hxx>
27 //=======================================================================
28 //class : GeomConvert_ApproxCurve_Eval
29 //purpose: evaluator class for approximation
30 //=======================================================================
32 class GeomConvert_ApproxCurve_Eval : public AdvApprox_EvaluatorFunction
35 GeomConvert_ApproxCurve_Eval (const Handle(Adaptor3d_HCurve)& theFunc,
36 Standard_Real First, Standard_Real Last)
37 : fonct(theFunc) { StartEndSav[0] = First; StartEndSav[1] = Last; }
39 virtual void Evaluate (Standard_Integer *Dimension,
40 Standard_Real StartEnd[2],
41 Standard_Real *Parameter,
42 Standard_Integer *DerivativeRequest,
43 Standard_Real *Result, // [Dimension]
44 Standard_Integer *ErrorCode);
47 Handle(Adaptor3d_HCurve) fonct;
48 Standard_Real StartEndSav[2];
51 void GeomConvert_ApproxCurve_Eval::Evaluate (Standard_Integer *Dimension,
52 Standard_Real StartEnd[2],
53 Standard_Real *Param, // Parameter at which evaluation
54 Standard_Integer *Order, // Derivative Request
55 Standard_Real *Result,// [Dimension]
56 Standard_Integer *ErrorCode)
59 Standard_Real par = *Param;
61 // Dimension is incorrect
66 if(StartEnd[0] != StartEndSav[0] || StartEnd[1]!= StartEndSav[1])
68 fonct = fonct->Trim(StartEnd[0],StartEnd[1],Precision::PConfusion());
69 StartEndSav[0]=StartEnd[0];
70 StartEndSav[1]=StartEnd[1];
78 pnt = fonct->Value(par);
84 fonct->D1(par, pnt, v1);
90 fonct->D2(par, pnt, v1, v2);
96 Result[0] = Result[1] = Result[2] = 0.;
102 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)
104 Handle(GeomAdaptor_HCurve) HCurve = new GeomAdaptor_HCurve (Curve);
105 Approximate(HCurve, Tol3d, Order, MaxSegments, MaxDegree);
108 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)
110 Approximate(Curve, Tol3d, Order, MaxSegments, MaxDegree);
113 void GeomConvert_ApproxCurve::Approximate(
114 const Handle(Adaptor3d_HCurve)& theCurve,
115 const Standard_Real theTol3d,
116 const GeomAbs_Shape theOrder,
117 const Standard_Integer theMaxSegments,
118 const Standard_Integer theMaxDegree)
120 // Initialisation of input parameters of AdvApprox
122 Standard_Integer Num1DSS=0, Num2DSS=0, Num3DSS=1;
123 Handle(TColStd_HArray1OfReal) OneDTolNul, TwoDTolNul;
124 Handle(TColStd_HArray1OfReal) ThreeDTol = new TColStd_HArray1OfReal(1,Num3DSS);
125 ThreeDTol->Init(theTol3d);
127 Standard_Real First = theCurve->FirstParameter();
128 Standard_Real Last = theCurve->LastParameter();
130 Standard_Integer NbInterv_C2 = theCurve->NbIntervals(GeomAbs_C2);
131 TColStd_Array1OfReal CutPnts_C2(1, NbInterv_C2+1);
132 theCurve->Intervals(CutPnts_C2,GeomAbs_C2);
133 Standard_Integer NbInterv_C3 = theCurve->NbIntervals(GeomAbs_C3);
134 TColStd_Array1OfReal CutPnts_C3(1, NbInterv_C3+1);
135 theCurve->Intervals(CutPnts_C3,GeomAbs_C3);
137 AdvApprox_PrefAndRec CutTool(CutPnts_C2,CutPnts_C3);
141 GeomConvert_ApproxCurve_Eval ev (theCurve, First, Last);
142 AdvApprox_ApproxAFunction aApprox (Num1DSS, Num2DSS, Num3DSS,
143 OneDTolNul, TwoDTolNul, ThreeDTol,
144 First, Last, theOrder,
145 theMaxDegree, theMaxSegments,
148 myIsDone = aApprox.IsDone();
149 myHasResult = aApprox.HasResult();
152 TColgp_Array1OfPnt Poles(1,aApprox.NbPoles());
153 aApprox.Poles(1,Poles);
154 Handle(TColStd_HArray1OfReal) Knots = aApprox.Knots();
155 Handle(TColStd_HArray1OfInteger) Mults = aApprox.Multiplicities();
156 Standard_Integer Degree = aApprox.Degree();
157 myBSplCurve = new Geom_BSplineCurve(Poles, Knots->Array1(), Mults->Array1(), Degree);
158 myMaxError = aApprox.MaxError(3, 1);
162 Handle(Geom_BSplineCurve) GeomConvert_ApproxCurve::Curve() const
167 Standard_Boolean GeomConvert_ApproxCurve::IsDone() const
172 Standard_Boolean GeomConvert_ApproxCurve::HasResult() const
177 Standard_Real GeomConvert_ApproxCurve::MaxError() const
182 void GeomConvert_ApproxCurve::Dump(Standard_OStream& o) const
184 o << "******* Dump of ApproxCurve *******" << endl;
185 o << "*******Error " << MaxError() << endl;