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// File: Approx_Curve2d.cxx
// Created: Tue Oct 28 16:45:57 1997
// Author: Roman BORISOV
// <rbv@velox.nnov.matra-dtv.fr>
#include <Approx_Curve2d.ixx>
#include <AdvApprox_PrefAndRec.hxx>
#include <AdvApprox_ApproxAFunction.hxx>
#include <TColgp_Array1OfPnt2d.hxx>
#include <Precision.hxx>
//=======================================================================
//class : Approx_Curve2d_Eval
//purpose: evaluator class for approximation
//=======================================================================
class Approx_Curve2d_Eval : public AdvApprox_EvaluatorFunction
{
public:
Approx_Curve2d_Eval (const Handle(Adaptor2d_HCurve2d)& theFunc,
Standard_Real First, Standard_Real Last)
: fonct(theFunc) { StartEndSav[0] = First; StartEndSav[1] = Last; }
virtual void Evaluate (Standard_Integer *Dimension,
Standard_Real StartEnd[2],
Standard_Real *Parameter,
Standard_Integer *DerivativeRequest,
Standard_Real *Result, // [Dimension]
Standard_Integer *ErrorCode);
private:
Handle(Adaptor2d_HCurve2d) fonct;
Standard_Real StartEndSav[2];
};
void Approx_Curve2d_Eval::Evaluate (Standard_Integer *Dimension,
Standard_Real StartEnd[2],
Standard_Real *Param, // Parameter at which evaluation
Standard_Integer *Order, // Derivative Request
Standard_Real *Result,// [Dimension]
Standard_Integer *ErrorCode)
{
*ErrorCode = 0;
Standard_Real par = *Param;
// Dimension is incorrect
if (*Dimension!=2) {
*ErrorCode = 1;
}
// Parameter is incorrect
if ( par < StartEnd[0] || par > StartEnd[1] ) {
*ErrorCode = 2;
}
if(StartEnd[0] != StartEndSav[0] || StartEnd[1]!= StartEndSav[1])
{
fonct = fonct->Trim(StartEnd[0],StartEnd[1],Precision::PConfusion());
StartEndSav[0]=StartEnd[0];
StartEndSav[1]=StartEnd[1];
}
gp_Pnt2d pnt;
gp_Vec2d v1, v2;
switch (*Order) {
case 0:
pnt = fonct->Value(par);
Result[0] = pnt.X();
Result[1] = pnt.Y();
break;
case 1:
fonct->D1(par, pnt, v1);
Result[0] = v1.X();
Result[1] = v1.Y();
break;
case 2:
fonct->D2(par, pnt, v1, v2);
Result[0] = v2.X();
Result[1] = v2.Y();
break;
default:
Result[0] = Result[1] = 0.;
*ErrorCode = 3;
break;
}
}
Approx_Curve2d::Approx_Curve2d(const Handle(Adaptor2d_HCurve2d)& C2D,const Standard_Real First,const Standard_Real Last,const Standard_Real TolU,const Standard_Real TolV,const GeomAbs_Shape Continuity,const Standard_Integer MaxDegree,const Standard_Integer MaxSegments)
{
C2D->Trim(First,Last,Precision::PConfusion());
Standard_Integer Num1DSS=2, Num2DSS=0, Num3DSS=0;
Handle(TColStd_HArray1OfReal) TwoDTolNul, ThreeDTolNul;
Handle(TColStd_HArray1OfReal) OneDTol = new TColStd_HArray1OfReal(1,Num1DSS);
OneDTol->ChangeValue(1) = TolU;
OneDTol->ChangeValue(2) = TolV;
Standard_Integer NbInterv_C2 = C2D->NbIntervals(GeomAbs_C2);
TColStd_Array1OfReal CutPnts_C2(1, NbInterv_C2+1);
C2D->Intervals(CutPnts_C2, GeomAbs_C2);
Standard_Integer NbInterv_C3 = C2D->NbIntervals(GeomAbs_C3);
TColStd_Array1OfReal CutPnts_C3(1, NbInterv_C3+1);
C2D->Intervals(CutPnts_C3, GeomAbs_C3);
AdvApprox_PrefAndRec CutTool(CutPnts_C2,CutPnts_C3);
myMaxError2dU = 0;
myMaxError2dV = 0;
Approx_Curve2d_Eval ev (C2D, First, Last);
AdvApprox_ApproxAFunction aApprox (Num1DSS, Num2DSS, Num3DSS,
OneDTol, TwoDTolNul, ThreeDTolNul,
First, Last, Continuity,
MaxDegree, MaxSegments,
ev, CutTool);
myIsDone = aApprox.IsDone();
myHasResult = aApprox.HasResult();
if (myHasResult) {
TColgp_Array1OfPnt2d Poles2d(1,aApprox.NbPoles());
TColStd_Array1OfReal Poles1dU(1,aApprox.NbPoles());
aApprox.Poles1d(1, Poles1dU);
TColStd_Array1OfReal Poles1dV(1,aApprox.NbPoles());
aApprox.Poles1d(2, Poles1dV);
for(Standard_Integer i = 1; i <= aApprox.NbPoles(); i++)
Poles2d.SetValue(i, gp_Pnt2d(Poles1dU.Value(i), Poles1dV.Value(i)));
Handle(TColStd_HArray1OfReal) Knots = aApprox.Knots();
Handle(TColStd_HArray1OfInteger) Mults = aApprox.Multiplicities();
Standard_Integer Degree = aApprox.Degree();
myCurve = new Geom2d_BSplineCurve(Poles2d, Knots->Array1(), Mults->Array1(), Degree);
myMaxError2dU = aApprox.MaxError(1, 1);
myMaxError2dV = aApprox.MaxError(1, 2);
}
}
Standard_Boolean Approx_Curve2d::IsDone() const
{
return myIsDone;
}
Standard_Boolean Approx_Curve2d::HasResult() const
{
return myHasResult;
}
Handle(Geom2d_BSplineCurve) Approx_Curve2d::Curve() const
{
return myCurve;
}
Standard_Real Approx_Curve2d::MaxError2dU() const
{
return myMaxError2dU;
}
Standard_Real Approx_Curve2d::MaxError2dV() const
{
return myMaxError2dV;
}
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