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c1609fbea6
1. Useless constructors have been deleted. 2. Value returned by gp_Parab2d::Directrix() method has been corrected to exclude reversing the directrix. 3. Documentation of gp_Parab2d class has been updated (in hxx-file). 4. Upgrade Guide has been updated according to corrections made in this issue. Creation of test cases for this issue.
128 lines
4.0 KiB
C++
128 lines
4.0 KiB
C++
// Created on: 1992-08-26
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// Created by: Remi GILET
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// Copyright (c) 1992-1999 Matra Datavision
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// Copyright (c) 1999-2014 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#ifndef _gce_MakeParab2d_HeaderFile
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#define _gce_MakeParab2d_HeaderFile
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#include <Standard.hxx>
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#include <Standard_DefineAlloc.hxx>
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#include <Standard_Handle.hxx>
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#include <gp_Parab2d.hxx>
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#include <gce_Root.hxx>
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#include <Standard_Real.hxx>
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#include <Standard_Boolean.hxx>
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class StdFail_NotDone;
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class gp_Ax2d;
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class gp_Ax22d;
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class gp_Pnt2d;
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class gp_Parab2d;
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//! This class implements the following algorithms used to
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//! create Parab2d from gp.
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//! Defines an infinite parabola.
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//! An axis placement one axis defines the local cartesian
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//! coordinate system ("XAxis") of the parabola.
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//! The vertex of the parabola is the "Location" point of the
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//! local coordinate system of the parabola.
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//! The "XAxis" of the parabola is its axis of symmetry.
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//! The "XAxis" is oriented from the vertex of the parabola to the
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//! Focus of the parabola.
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//! The "YAxis" is parallel to the directrix of the parabola and
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//! its "Location" point is the vertex of the parabola.
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//! The equation of the parabola in the local coordinate system is
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//! Y**2 = (2*P) * X
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//! P is the distance between the focus and the directrix of the
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//! parabola called Parameter).
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//! The focal length F = P/2 is the distance between the vertex
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//! and the focus of the parabola.
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//!
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//! * Create a Parab2d from one apex and the center.
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//! * Create a Parab2d with the directrix and the focus point.
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//! * Create a Parab2d with its vertex point and its axis
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//! of symetry and its focus length.
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class gce_MakeParab2d : public gce_Root
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{
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public:
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DEFINE_STANDARD_ALLOC
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//! Creates a parabola with its axis of symmetry ("MirrorAxis")
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//! and its focal length.
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//! Warnings : It is possible to have Focal = 0.
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//! The status is "NullFocalLength" Raised if Focal < 0.0
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Standard_EXPORT gce_MakeParab2d(const gp_Ax2d& MirrorAxis, const Standard_Real Focal, const Standard_Boolean Sense = Standard_True);
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//! Creates a parabola with its local coordinate system <A>
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//! and its focal length.
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//! Warnings : It is possible to have Focal = 0.
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//! The status is "NullFocalLength" Raised if Focal < 0.0
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Standard_EXPORT gce_MakeParab2d(const gp_Ax22d& A, const Standard_Real Focal);
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//! Creates a parabola with the directrix and the focus point.
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//! The sense of parametrization is given by Sense.
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Standard_EXPORT gce_MakeParab2d(const gp_Ax2d& D, const gp_Pnt2d& F, const Standard_Boolean Sense = Standard_True);
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//! Make an Parab2d with S1 as the Focal point and Center
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//! as the apex of the parabola
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//! Warning
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//! The MakeParab2d class does not prevent the
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//! construction of a parabola with a null focal distance.
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//! If an error occurs (that is, when IsDone returns
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//! false), the Status function returns:
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//! - gce_NullFocusLength if Focal is less than 0.0, or
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//! - gce_NullAxis if S1 and Center are coincident.
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Standard_EXPORT gce_MakeParab2d(const gp_Pnt2d& S1, const gp_Pnt2d& Center, const Standard_Boolean Sense = Standard_True);
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//! Returns the constructed parabola.
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//! Exceptions StdFail_NotDone if no parabola is constructed.
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Standard_EXPORT const gp_Parab2d& Value() const;
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Standard_EXPORT const gp_Parab2d& Operator() const;
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Standard_EXPORT operator gp_Parab2d() const;
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protected:
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private:
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gp_Parab2d TheParab2d;
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};
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#endif // _gce_MakeParab2d_HeaderFile
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