Open CASCADE Technology 6.6.0
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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>
Public Member Functions | |
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 | |
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 | |
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. | |
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. | |
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: | |
const gp_Parab2d & | Value () const |
Returns the constructed parabola. Exceptions StdFail_NotDone if no parabola is constructed. | |
const gp_Parab2d & | Operator () const |
operator gp_Parab2d () const |
gce_MakeParab2d::gce_MakeParab2d | ( | const gp_Ax2d & | MirrorAxis, |
const Standard_Real | Focal, | ||
const Standard_Boolean | Sense = Standard_True |
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) |
gce_MakeParab2d::gce_MakeParab2d | ( | const gp_Ax22d & | A, |
const Standard_Real | Focal | ||
) |
gce_MakeParab2d::gce_MakeParab2d | ( | const gp_Ax2d & | D, |
const gp_Pnt2d & | F, | ||
const Standard_Boolean | Sense = Standard_True |
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) |
gce_MakeParab2d::gce_MakeParab2d | ( | const gp_Pnt2d & | S1, |
const gp_Pnt2d & | Center, | ||
const Standard_Boolean | Sense = Standard_True |
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) |
const gp_Parab2d& gce_MakeParab2d::Operator | ( | ) | const |
gce_MakeParab2d::operator gp_Parab2d | ( | ) | const |
const gp_Parab2d& gce_MakeParab2d::Value | ( | ) | const |