Convert_EllipseToBSplineCurve Class Reference

This algorithm converts a ellipse into a rational B-spline curve. The ellipse is represented an Elips2d from package gp with the parametrization : P (U) = Loc + (MajorRadius * std::cos(U) * Xdir + MinorRadius * std::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 as the ellipse E.
	Convert_EllipseToBSplineCurve (const gp_Elips2d &E, const double U1, const double 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.
Public Member Functions inherited from Convert_ConicToBSplineCurve
int	Degree () const
	Returns the degree of the BSpline curve whose data is computed in this framework.
int	NbPoles () const
	Returns the number of poles of the BSpline curve whose data is computed in this framework.
int	NbKnots () const
	Returns the number of knots of the BSpline curve whose data is computed in this framework.
bool	IsPeriodic () const
	Returns true if the BSpline curve whose data is computed in this framework is periodic.
gp_Pnt2d	Pole (const int theIndex) const
	Returns the pole of index Index to the poles table of the BSpline curve whose data is computed in this framework.
double	Weight (const int theIndex) const
	Returns the weight of the pole of index Index to the poles table of the BSpline curve whose data is computed in this framework.
double	Knot (const int theIndex) const
	Returns the knot of index Index to the knots table of the BSpline curve whose data is computed in this framework.
int	Multiplicity (const int theIndex) const
	Returns the multiplicity of the knot of index Index to the knots table of the BSpline curve whose data is computed in this framework.
const NCollection_Array1< gp_Pnt2d > &	Poles () const
	Returns the poles of the BSpline curve.
const NCollection_Array1< double > &	Weights () const
	Returns the weights of the BSpline curve.
const NCollection_Array1< double > &	Knots () const
	Returns the knots of the BSpline curve.
const NCollection_Array1< int > &	Multiplicities () const
	Returns the multiplicities of the BSpline curve.
void	BuildCosAndSin (const Convert_ParameterisationType theParametrisation, occ::handle< NCollection_HArray1< double > > &theCosNumerator, occ::handle< NCollection_HArray1< double > > &theSinNumerator, occ::handle< NCollection_HArray1< double > > &theDenominator, int &theDegree, occ::handle< NCollection_HArray1< double > > &theKnots, occ::handle< NCollection_HArray1< int > > &theMults) const
	Legacy API returning handle arrays for compatibility.
void	BuildCosAndSin (const Convert_ParameterisationType theParametrisation, const double theUFirst, const double theULast, occ::handle< NCollection_HArray1< double > > &theCosNumerator, occ::handle< NCollection_HArray1< double > > &theSinNumerator, occ::handle< NCollection_HArray1< double > > &theDenominator, int &theDegree, occ::handle< NCollection_HArray1< double > > &theKnots, occ::handle< NCollection_HArray1< int > > &theMults) const
	Legacy API returning handle arrays for compatibility.

Additional Inherited Members
Protected Member Functions inherited from Convert_ConicToBSplineCurve
	Convert_ConicToBSplineCurve (const int theNumberOfPoles, const int theNumberOfKnots, const int theDegree)
void	BuildCosAndSin (const Convert_ParameterisationType theParametrisation, NCollection_Array1< double > &theCosNumerator, NCollection_Array1< double > &theSinNumerator, NCollection_Array1< double > &theDenominator, int &theDegree, NCollection_Array1< double > &theKnots, NCollection_Array1< int > &theMults) const
void	BuildCosAndSin (const Convert_ParameterisationType theParametrisation, const double theUFirst, const double theULast, NCollection_Array1< double > &theCosNumerator, NCollection_Array1< double > &theSinNumerator, NCollection_Array1< double > &theDenominator, int &theDegree, NCollection_Array1< double > &theKnots, NCollection_Array1< int > &theMults) const
Protected Attributes inherited from Convert_ConicToBSplineCurve
NCollection_Array1< gp_Pnt2d >	myPoles
NCollection_Array1< double >	myWeights
NCollection_Array1< double >	myKnots
NCollection_Array1< int >	myMults
int	myDegree = 0
bool	myIsPeriodic = false

Detailed Description

This algorithm converts a ellipse into a rational B-spline curve. The ellipse is represented an Elips2d from package gp with the parametrization : P (U) = Loc + (MajorRadius * std::cos(U) * Xdir + MinorRadius * std::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() [1/2]

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

The equivalent B-spline curve has the same orientation as the ellipse E.

Convert_EllipseToBSplineCurve() [2/2]

Convert_EllipseToBSplineCurve::Convert_EllipseToBSplineCurve	(	const gp_Elips2d &	E,
		const double	U1,
		const double	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