Open CASCADE Technology  7.7.0.dev
Public Member Functions

GCE2d_MakeParabola Class Reference

This class implements the following algorithms used to create Parabola from Geom2d. More...

#include <GCE2d_MakeParabola.hxx>

Inheritance diagram for GCE2d_MakeParabola:
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Public Member Functions

 GCE2d_MakeParabola (const gp_Parab2d &Prb)
 Creates a parabola from a non persistent one. More...
 
 GCE2d_MakeParabola (const gp_Ax22d &Axis, const Standard_Real Focal)
 Creates a parabola with its local coordinate system and it's focal length "Focal". The "Location" point of "Axis" is the vertex of the parabola Status is "NegativeFocusLength" if Focal < 0.0. More...
 
 GCE2d_MakeParabola (const gp_Ax2d &MirrorAxis, const Standard_Real Focal, const Standard_Boolean Sense)
 Creates a parabola with its "MirrorAxis" and it's focal length "Focal". MirrorAxis is the axis of symmetry of the curve, it is the "XAxis". The "YAxis" is parallel to the directrix of the parabola. The "Location" point of "MirrorAxis" is the vertex of the parabola Status is "NegativeFocusLength" if Focal < 0.0. More...
 
 GCE2d_MakeParabola (const gp_Ax2d &D, const gp_Pnt2d &F, const Standard_Boolean Sense=Standard_True)
 D is the directrix of the parabola and F the focus point. The symmetry axis "XAxis" of the parabola is normal to the directrix and pass through the focus point F, but its "Location" point is the vertex of the parabola. The "YAxis" of the parabola is parallel to D and its "Location" point is the vertex of the parabola. More...
 
 GCE2d_MakeParabola (const gp_Pnt2d &S1, const gp_Pnt2d &O)
 Make a parabola with focal point S1 and center O The branch of the parabola returned will have <S1> as focal point The implicit orientation of the parabola is: More...
 
const Handle< Geom2d_Parabola > & Value () const
 Returns the constructed parabola. Exceptions StdFail_NotDone if no parabola is constructed. More...
 
 operator const Handle< Geom2d_Parabola > & () const
 
- Public Member Functions inherited from GCE2d_Root
Standard_Boolean IsDone () const
 Returns true if the construction is successful. More...
 
gce_ErrorType Status () const
 Returns the status of the construction. More...
 

Additional Inherited Members

- Protected Attributes inherited from GCE2d_Root
gce_ErrorType TheError
 

Detailed Description

This class implements the following algorithms used to create Parabola from Geom2d.

Constructor & Destructor Documentation

◆ GCE2d_MakeParabola() [1/5]

GCE2d_MakeParabola::GCE2d_MakeParabola ( const gp_Parab2d Prb)

Creates a parabola from a non persistent one.

◆ GCE2d_MakeParabola() [2/5]

GCE2d_MakeParabola::GCE2d_MakeParabola ( const gp_Ax22d Axis,
const Standard_Real  Focal 
)

Creates a parabola with its local coordinate system and it's focal length "Focal". The "Location" point of "Axis" is the vertex of the parabola Status is "NegativeFocusLength" if Focal < 0.0.

◆ GCE2d_MakeParabola() [3/5]

GCE2d_MakeParabola::GCE2d_MakeParabola ( const gp_Ax2d MirrorAxis,
const Standard_Real  Focal,
const Standard_Boolean  Sense 
)

Creates a parabola with its "MirrorAxis" and it's focal length "Focal". MirrorAxis is the axis of symmetry of the curve, it is the "XAxis". The "YAxis" is parallel to the directrix of the parabola. The "Location" point of "MirrorAxis" is the vertex of the parabola Status is "NegativeFocusLength" if Focal < 0.0.

◆ GCE2d_MakeParabola() [4/5]

GCE2d_MakeParabola::GCE2d_MakeParabola ( const gp_Ax2d D,
const gp_Pnt2d F,
const Standard_Boolean  Sense = Standard_True 
)

D is the directrix of the parabola and F the focus point. The symmetry axis "XAxis" of the parabola is normal to the directrix and pass through the focus point F, but its "Location" point is the vertex of the parabola. The "YAxis" of the parabola is parallel to D and its "Location" point is the vertex of the parabola.

◆ GCE2d_MakeParabola() [5/5]

GCE2d_MakeParabola::GCE2d_MakeParabola ( const gp_Pnt2d S1,
const gp_Pnt2d O 
)

Make a parabola with focal point S1 and center O The branch of the parabola returned will have <S1> as focal point The implicit orientation of the parabola is:

  • the same one as the parabola Prb,
  • the sense defined by the coordinate system Axis or the directrix D,
  • the trigonometric sense if Sense is not given or is true, or
  • the opposite sense if Sense is false. Warning The MakeParabola class does not prevent the construction of a parabola with a null focal distance. If an error occurs (that is, when IsDone returns false), the Status function returns:
  • gce_NullFocusLength if Focal is less than 0.0, or
  • gce_NullAxis if points S1 and O are coincident.

Member Function Documentation

◆ operator const Handle< Geom2d_Parabola > &()

GCE2d_MakeParabola::operator const Handle< Geom2d_Parabola > & ( ) const
inline

◆ Value()

const Handle< Geom2d_Parabola >& GCE2d_MakeParabola::Value ( ) const

Returns the constructed parabola. Exceptions StdFail_NotDone if no parabola is constructed.


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