Convert_EllipseToBSplineCurve Class Reference

This algorithm converts a ellipse into a rational B-spline curve. <br>

The ellipse is represented an Elips2d from package gp with
the parametrization :
P (U) =
Loc + (MajorRadius * Cos(U) * Xdir + MinorRadius * Sin(U) * Ydir)
where Loc is the center of the ellipse, Xdir and Ydir are the
normalized directions of the local cartesian coordinate system of
the ellipse. The parametrization range is U [0, 2PI].
KeyWords :
Convert, Ellipse, BSplineCurve, 2D .
More...

#include <Convert_EllipseToBSplineCurve.hxx>

Inheritance diagram for Convert_EllipseToBSplineCurve:

Public Member Functions
	Convert_EllipseToBSplineCurve (const gp_Elips2d &E, const Convert_ParameterisationType Parameterisation=Convert_TgtThetaOver2)
	The equivalent B-spline curve has the same orientation <br> as the ellipse E. More...
	Convert_EllipseToBSplineCurve (const gp_Elips2d &E, const Standard_Real U1, const Standard_Real U2, const Convert_ParameterisationType Parameterisation=Convert_TgtThetaOver2)
	The ellipse E is limited between the parametric values U1, U2. The equivalent B-spline curve is oriented from U1 to U2 and has the same orientation as E. Raised if U1 = U2 or U1 = U2 + 2.0 * Pi More...
Public Member Functions inherited from Convert_ConicToBSplineCurve
Standard_Integer	Degree () const
	Returns the degree of the BSpline curve whose data is <br> computed in this framework. More...
Standard_Integer	NbPoles () const
	Returns the number of poles of the BSpline curve whose <br> data is computed in this framework. More...
Standard_Integer	NbKnots () const
	Returns the number of knots of the BSpline curve whose <br> data is computed in this framework. More...
Standard_Boolean	IsPeriodic () const
	Returns true if the BSpline curve whose data is computed in <br> this framework is periodic. More...
gp_Pnt2d	Pole (const Standard_Integer Index) const
	Returns the pole of index Index to the poles table of the <br> BSpline curve whose data is computed in this framework. Exceptions Standard_OutOfRange if Index is outside the bounds of the poles table of the BSpline curve whose data is computed in this framework. More...
Standard_Real	Weight (const Standard_Integer Index) const
	Returns the weight of the pole of index Index to the poles <br> table of the BSpline curve whose data is computed in this framework. Exceptions Standard_OutOfRange if Index is outside the bounds of the poles table of the BSpline curve whose data is computed in this framework. More...
Standard_Real	Knot (const Standard_Integer Index) const
	Returns the knot of index Index to the knots table of the <br> BSpline curve whose data is computed in this framework. Exceptions Standard_OutOfRange if Index is outside the bounds of the knots table of the BSpline curve whose data is computed in this framework. More...
Standard_Integer	Multiplicity (const Standard_Integer Index) const
	Returns the multiplicity of the knot of index Index to the <br> knots table of the BSpline curve whose data is computed in this framework. Exceptions Standard_OutOfRange if Index is outside the bounds of the knots table of the BSpline curve whose data is computed in this framework. More...
void	BuildCosAndSin (const Convert_ParameterisationType Parametrisation, Handle< TColStd_HArray1OfReal > &CosNumerator, Handle< TColStd_HArray1OfReal > &SinNumerator, Handle< TColStd_HArray1OfReal > &Denominator, Standard_Integer &Degree, Handle< TColStd_HArray1OfReal > &Knots, Handle< TColStd_HArray1OfInteger > &Mults) const
void	BuildCosAndSin (const Convert_ParameterisationType Parametrisation, const Standard_Real UFirst, const Standard_Real ULast, Handle< TColStd_HArray1OfReal > &CosNumerator, Handle< TColStd_HArray1OfReal > &SinNumerator, Handle< TColStd_HArray1OfReal > &Denominator, Standard_Integer &Degree, Handle< TColStd_HArray1OfReal > &Knots, Handle< TColStd_HArray1OfInteger > &Mults) const

Additional Inherited Members
Protected Member Functions inherited from Convert_ConicToBSplineCurve
	Convert_ConicToBSplineCurve (const Standard_Integer NumberOfPoles, const Standard_Integer NumberOfKnots, const Standard_Integer Degree)
Protected Attributes inherited from Convert_ConicToBSplineCurve
Handle_TColgp_HArray1OfPnt2d	poles
Handle_TColStd_HArray1OfReal	weights
Handle_TColStd_HArray1OfReal	knots
Handle_TColStd_HArray1OfInteger	mults
Standard_Integer	degree
Standard_Integer	nbPoles
Standard_Integer	nbKnots
Standard_Boolean	isperiodic

Detailed Description

This algorithm converts a ellipse into a rational B-spline curve. <br>

The ellipse is represented an Elips2d from package gp with
the parametrization :
P (U) =
Loc + (MajorRadius * Cos(U) * Xdir + MinorRadius * Sin(U) * Ydir)
where Loc is the center of the ellipse, Xdir and Ydir are the
normalized directions of the local cartesian coordinate system of
the ellipse. The parametrization range is U [0, 2PI].
KeyWords :
Convert, Ellipse, BSplineCurve, 2D .

Constructor & Destructor Documentation

Convert_EllipseToBSplineCurve::Convert_EllipseToBSplineCurve	(	const gp_Elips2d &	E,
		const Convert_ParameterisationType	Parameterisation = Convert_TgtThetaOver2
	)

The equivalent B-spline curve has the same orientation <br>

as the ellipse E.

Convert_EllipseToBSplineCurve::Convert_EllipseToBSplineCurve	(	const gp_Elips2d &	E,
		const Standard_Real	U1,
		const Standard_Real	U2,
		const Convert_ParameterisationType	Parameterisation = Convert_TgtThetaOver2
	)

The ellipse E is limited between the parametric values U1, U2.
The equivalent B-spline curve is oriented from U1 to U2 and has
the same orientation as E.
Raised if U1 = U2 or U1 = U2 + 2.0 * Pi

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The documentation for this class was generated from the following file:

• Convert_EllipseToBSplineCurve.hxx