Open CASCADE Technology  7.7.0.dev
Public Member Functions

Convert_ParabolaToBSplineCurve Class Reference

This algorithm converts a parabola into a non rational B-spline curve. The parabola is a Parab2d from package gp with the parametrization P (U) = Loc + F * (U*U * Xdir + 2 * U * Ydir) where Loc is the apex of the parabola, Xdir is the normalized direction of the symmetry axis of the parabola, Ydir is the normalized direction of the directrix and F is the focal length. KeyWords : Convert, Parabola, BSplineCurve, 2D . More...

#include <Convert_ParabolaToBSplineCurve.hxx>

Inheritance diagram for Convert_ParabolaToBSplineCurve:
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Public Member Functions

 Convert_ParabolaToBSplineCurve (const gp_Parab2d &Prb, const Standard_Real U1, const Standard_Real U2)
 The parabola Prb is limited between the parametric values U1, U2 and the equivalent B-spline curve as the same orientation as the parabola Prb. More...
 
- Public Member Functions inherited from Convert_ConicToBSplineCurve
Standard_Integer Degree () const
 Returns the degree of the BSpline curve whose data is computed in this framework. More...
 
Standard_Integer NbPoles () const
 Returns the number of poles of the BSpline curve whose data is computed in this framework. More...
 
Standard_Integer NbKnots () const
 Returns the number of knots of the BSpline curve whose data is computed in this framework. More...
 
Standard_Boolean IsPeriodic () const
 Returns true if the BSpline curve whose data is computed in 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 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 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 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 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 parabola into a non rational B-spline curve. The parabola is a Parab2d from package gp with the parametrization P (U) = Loc + F * (U*U * Xdir + 2 * U * Ydir) where Loc is the apex of the parabola, Xdir is the normalized direction of the symmetry axis of the parabola, Ydir is the normalized direction of the directrix and F is the focal length. KeyWords : Convert, Parabola, BSplineCurve, 2D .

Constructor & Destructor Documentation

◆ Convert_ParabolaToBSplineCurve()

Convert_ParabolaToBSplineCurve::Convert_ParabolaToBSplineCurve ( const gp_Parab2d Prb,
const Standard_Real  U1,
const Standard_Real  U2 
)

The parabola Prb is limited between the parametric values U1, U2 and the equivalent B-spline curve as the same orientation as the parabola Prb.


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