Convert_ConicToBSplineCurve Class Reference

Root class for algorithms which convert a conic curve into a BSpline curve (CircleToBSplineCurve, EllipseToBSplineCurve, HyperbolaToBSplineCurve, ParabolaToBSplineCurve). These algorithms all work on 2D curves from the gp package and compute all the data needed to construct a BSpline curve equivalent to the conic curve. This data consists of: More...

#include <Convert_ConicToBSplineCurve.hxx>

Inheritance diagram for Convert_ConicToBSplineCurve:

Public Member Functions
Standard_Integer	Degree () const
	Returns the degree of the BSpline curve whose data is computed in this framework.
Standard_Integer	NbPoles () const
	Returns the number of poles of the BSpline curve whose data is computed in this framework.
Standard_Integer	NbKnots () const
	Returns the number of knots of the BSpline curve whose data is computed in this framework.
Standard_Boolean	IsPeriodic () const
	Returns true if the BSpline curve whose data is computed in this framework is periodic.
gp_Pnt2d	Pole (const Standard_Integer Index) const
	Returns the pole of index Index to the poles 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.
Standard_Real	Weight (const Standard_Integer Index) 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. Exceptions Standard_OutOfRange if Index is outside the bounds of the poles table of the BSpline curve whose data is computed in this framework.
Standard_Real	Knot (const Standard_Integer Index) const
	Returns the knot of index Index to the 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.
Standard_Integer	Multiplicity (const Standard_Integer Index) 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. Exceptions Standard_OutOfRange if Index is outside the bounds of the knots table of the BSpline curve whose data is computed in this framework.
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

Protected Member Functions
	Convert_ConicToBSplineCurve (const Standard_Integer NumberOfPoles, const Standard_Integer NumberOfKnots, const Standard_Integer Degree)

Protected Attributes
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

Root class for algorithms which convert a conic curve into a BSpline curve (CircleToBSplineCurve, EllipseToBSplineCurve, HyperbolaToBSplineCurve, ParabolaToBSplineCurve). These algorithms all work on 2D curves from the gp package and compute all the data needed to construct a BSpline curve equivalent to the conic curve. This data consists of:

• the degree of the curve,
• the periodic characteristics of the curve,
• a poles table with associated weights,
• a knots table with associated multiplicities. The abstract class ConicToBSplineCurve provides a framework for storing and consulting this computed data. The data may then be used to construct a Geom2d_BSplineCurve curvSuper class of the following classes : This abstract class implements the methods to get the geometric representation of the B-spline curve equivalent to the conic. The B-spline is computed at the creation time in the sub classes. The B-spline curve is defined with its degree, its control points (Poles), its weights, its knots and their multiplicity. All the geometric entities used in this package are defined in 2D space. KeyWords : Convert, Conic, BSplineCurve, 2D.

Constructor & Destructor Documentation

Convert_ConicToBSplineCurve()

Convert_ConicToBSplineCurve::Convert_ConicToBSplineCurve ( const Standard_Integer NumberOfPoles, const Standard_Integer NumberOfKnots, const Standard_Integer Degree )

protected

Member Function Documentation

BuildCosAndSin() [1/2]

void Convert_ConicToBSplineCurve::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

BuildCosAndSin() [2/2]

void Convert_ConicToBSplineCurve::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

Degree()

Standard_Integer Convert_ConicToBSplineCurve::Degree

(

)

const

Returns the degree of the BSpline curve whose data is computed in this framework.

IsPeriodic()

Standard_Boolean Convert_ConicToBSplineCurve::IsPeriodic

(

)

const

Returns true if the BSpline curve whose data is computed in this framework is periodic.

Knot()

Standard_Real Convert_ConicToBSplineCurve::Knot

(

const Standard_Integer

Index

)

const

Returns the knot of index Index to the 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.

Multiplicity()

Standard_Integer Convert_ConicToBSplineCurve::Multiplicity

(

const Standard_Integer

Index

)

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. Exceptions Standard_OutOfRange if Index is outside the bounds of the knots table of the BSpline curve whose data is computed in this framework.

NbKnots()

Standard_Integer Convert_ConicToBSplineCurve::NbKnots

(

)

const

Returns the number of knots of the BSpline curve whose data is computed in this framework.

NbPoles()

Standard_Integer Convert_ConicToBSplineCurve::NbPoles

(

)

const

Returns the number of poles of the BSpline curve whose data is computed in this framework.

Pole()

gp_Pnt2d Convert_ConicToBSplineCurve::Pole

(

const Standard_Integer

Index

)

const

Returns the pole of index Index to the poles 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.

Weight()

Standard_Real Convert_ConicToBSplineCurve::Weight

(

const Standard_Integer

Index

)

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. Exceptions Standard_OutOfRange if Index is outside the bounds of the poles table of the BSpline curve whose data is computed in this framework.

Field Documentation

degree

Standard_Integer Convert_ConicToBSplineCurve::degree

protected

isperiodic

Standard_Boolean Convert_ConicToBSplineCurve::isperiodic

protected

knots

Handle< TColStd_HArray1OfReal > Convert_ConicToBSplineCurve::knots

protected

mults

Handle< TColStd_HArray1OfInteger > Convert_ConicToBSplineCurve::mults

protected

nbKnots

Standard_Integer Convert_ConicToBSplineCurve::nbKnots

protected

nbPoles

Standard_Integer Convert_ConicToBSplineCurve::nbPoles

protected

poles

Handle< TColgp_HArray1OfPnt2d > Convert_ConicToBSplineCurve::poles

protected

weights

Handle< TColStd_HArray1OfReal > Convert_ConicToBSplineCurve::weights

protected

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

• Convert_ConicToBSplineCurve.hxx