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gce_MakeParab2d Class Reference

This class implements the following algorithms used to
create Parab2d from gp.
Defines an infinite parabola.
An axis placement one axis defines the local cartesian
coordinate system ("XAxis") of the parabola.
The vertex of the parabola is the "Location" point of the
local coordinate system of the parabola.
The "XAxis" of the parabola is its axis of symmetry.
The "XAxis" is oriented from the vertex of the parabola to the
Focus of the parabola.
The "YAxis" is parallel to the directrix of the parabola and
its "Location" point is the vertex of the parabola.
The equation of the parabola in the local coordinate system is
Y**2 = (2*P) * X
P is the distance between the focus and the directrix of the
parabola called Parameter).
The focal length F = P/2 is the distance between the vertex
and the focus of the parabola.

* Create a Parab2d from one apex and the center.
* Create a Parab2d with the directrix and the focus point.
* Create a Parab2d with its vertex point and its axis
of symetry and its focus length.
.

#include <gce_MakeParab2d.hxx>

Inheritance diagram for gce_MakeParab2d:

Inheritance graph
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Public Member Functions

void * operator new (size_t, void *anAddress)
void * operator new (size_t size)
void operator delete (void *anAddress)
Standard_EXPORT gce_MakeParab2d (const gp_Ax2d &MirrorAxis, const Standard_Real Focal, const Standard_Boolean Sense=Standard_True)
 Creates a parabola with its axis of symmetry ("MirrorAxis")
and its focal length.
Warnings : It is possible to have Focal = 0.
The status is "NullFocalLength" Raised if Focal < 0.0
.
Standard_EXPORT gce_MakeParab2d (const gp_Ax22d &A, const Standard_Real Focal)
 Creates a parabola with its local coordinate system
and its focal length.
Warnings : It is possible to have Focal = 0.
The status is "NullFocalLength" Raised if Focal < 0.0
.
Standard_EXPORT gce_MakeParab2d (const gp_Ax2d &D, const gp_Pnt2d &F, const Standard_Boolean Sense=Standard_True)
 Creates a parabola with the directrix and the focus point.
The sense of parametrization is given by Sense.
.
Standard_EXPORT gce_MakeParab2d (const gp_Ax22d &D, const gp_Pnt2d &F)
 Creates a parabola with the local coordinate system and
the focus point.
The sense of parametrization is given by Sense.
.
Standard_EXPORT gce_MakeParab2d (const gp_Pnt2d &S1, const gp_Pnt2d &Center, const Standard_Boolean Sense=Standard_True)
 Make an Parab2d with S1 as the Focal point and Center
as the apex of the parabola
Warning
The MakeParab2d 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 S1 and Center are coincident.
.
Standard_EXPORT const gp_Parab2d & Value () const
 Returns the constructed parabola.
Exceptions StdFail_NotDone if no parabola is constructed.
.
Standard_EXPORT const gp_Parab2d & Operator () const
Standard_EXPORT operator gp_Parab2d () const

Private Attributes

gp_Parab2d TheParab2d

Constructor & Destructor Documentation

Standard_EXPORT gce_MakeParab2d::gce_MakeParab2d const gp_Ax2d &  MirrorAxis,
const Standard_Real  Focal,
const Standard_Boolean  Sense = Standard_True
 

Standard_EXPORT gce_MakeParab2d::gce_MakeParab2d const gp_Ax22d &  A,
const Standard_Real  Focal
 

Standard_EXPORT gce_MakeParab2d::gce_MakeParab2d const gp_Ax2d &  D,
const gp_Pnt2d &  F,
const Standard_Boolean  Sense = Standard_True
 

Standard_EXPORT gce_MakeParab2d::gce_MakeParab2d const gp_Ax22d &  D,
const gp_Pnt2d &  F
 

Standard_EXPORT gce_MakeParab2d::gce_MakeParab2d const gp_Pnt2d &  S1,
const gp_Pnt2d &  Center,
const Standard_Boolean  Sense = Standard_True
 


Member Function Documentation

Standard_EXPORT const gp_Parab2d& gce_MakeParab2d::Operator  )  const
 

void gce_MakeParab2d::operator delete void *  anAddress  )  [inline]
 

Reimplemented from gce_Root.

Standard_EXPORT gce_MakeParab2d::operator gp_Parab2d  )  const
 

void* gce_MakeParab2d::operator new size_t  size  )  [inline]
 

Reimplemented from gce_Root.

void* gce_MakeParab2d::operator new size_t  ,
void *  anAddress
[inline]
 

Reimplemented from gce_Root.

Standard_EXPORT const gp_Parab2d& gce_MakeParab2d::Value  )  const
 


Field Documentation

gp_Parab2d gce_MakeParab2d::TheParab2d [private]
 


The documentation for this class was generated from the following file:
Generated on Mon Aug 25 13:22:45 2008 for OpenCASCADE by  doxygen 1.4.1