Open CASCADE Technology
6.5.4
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This class implements the following algorithms used to
create Parabola from Geom2d.
More...
#include <GCE2d_MakeParabola.hxx>
Public Member Functions | |
DEFINE_STANDARD_ALLOC | GCE2d_MakeParabola (const gp_Parab2d &Prb) |
Creates a parabola from a non persistent one. | |
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 (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 (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. | |
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 (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: | |
const Handle_Geom2d_Parabola & | Value () const |
Returns the constructed parabola. Exceptions StdFail_NotDone if no parabola is constructed. | |
const Handle_Geom2d_Parabola & | Operator () const |
operator Handle_Geom2d_Parabola () const |
* Create an Parabola from two apex and the center. <br>
Defines the parabola in the parameterization range :
]-infinite,+infinite[
The vertex of the parabola is the "Location" point of the
local coordinate system "XAxis" 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 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.
GCE2d_MakeParabola::GCE2d_MakeParabola | ( | const gp_Ax22d & | Axis, |
const Standard_Real | Focal | ||
) |
GCE2d_MakeParabola::GCE2d_MakeParabola | ( | const gp_Ax2d & | MirrorAxis, |
const Standard_Real | Focal, | ||
const Standard_Boolean | Sense | ||
) |
GCE2d_MakeParabola::GCE2d_MakeParabola | ( | const gp_Ax22d & | D, |
const gp_Pnt2d & | F | ||
) |
GCE2d_MakeParabola::GCE2d_MakeParabola | ( | const gp_Ax2d & | D, |
const gp_Pnt2d & | F, | ||
const Standard_Boolean | Sense = Standard_True |
||
) |
GCE2d_MakeParabola::GCE2d_MakeParabola | ( | const gp_Pnt2d & | S1, |
const gp_Pnt2d & | O | ||
) |
const Handle_Geom2d_Parabola& GCE2d_MakeParabola::Operator | ( | ) | const |
GCE2d_MakeParabola::operator Handle_Geom2d_Parabola | ( | ) | const |
const Handle_Geom2d_Parabola& GCE2d_MakeParabola::Value | ( | ) | const |