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122 lines
4.0 KiB
C++
122 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_MakeElips2d_HeaderFile
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#define _gce_MakeElips2d_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_Elips2d.hxx>
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#include <gce_Root.hxx>
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#include <Standard_Boolean.hxx>
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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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//! This class implements the following algorithms used to
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//! create Elips2d from gp.
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//!
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//! * Create an ellipse from its center, and two points:
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//! one on the ciconference giving the major radius, the
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//! other giving the value of the small radius.
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//! * Create an ellipse from its major axis and its major
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//! radius and its minor radius.
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class gce_MakeElips2d : public gce_Root
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{
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public:
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DEFINE_STANDARD_ALLOC
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//! Creates an ellipse with the major axis, the major and the
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//! minor radius. The location of the MajorAxis is the center
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//! of the ellipse.
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//! The sense of parametrization is given by Sense.
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//! It is possible to create an ellipse with MajorRadius = MinorRadius.
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//! the status is "InvertRadius" if MajorRadius < MinorRadius or
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//! "NegativeRadius" if MinorRadius < 0.0
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Standard_EXPORT gce_MakeElips2d(const gp_Ax2d& MajorAxis, const Standard_Real MajorRadius, const Standard_Real MinorRadius, const Standard_Boolean Sense = Standard_True);
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//! Axis defines the Xaxis and Yaxis of the ellipse which defines
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//! the origin and the sense of parametrization.
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//! Creates an ellipse with the AxisPlacement the major and the
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//! minor radius. The location of Axis is the center
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//! of the ellipse.
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//! It is possible to create an ellipse with MajorRadius = MinorRadius.
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//! the status is "InvertRadius" if MajorRadius < MinorRadius or
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//! "NegativeRadius" if MinorRadius < 0.0
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Standard_EXPORT gce_MakeElips2d(const gp_Ax22d& A, const Standard_Real MajorRadius, const Standard_Real MinorRadius);
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//! Makes an Elips2d with its center and two points.
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//! The sense of parametrization is given by S1, S2,
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//! and Center.
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//! Depending on the constructor, the implicit orientation of the ellipse is:
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//! - the sense defined by A,
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//! - the sense defined by points Center, S1 and S2,
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//! - the trigonometric sense if Sense is not given or is true, or
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//! - the opposite if Sense is false.
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//! It is possible to construct an ellipse where the major
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//! and minor radii are equal.
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//! Warning
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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_InvertRadius if MajorRadius is less than MinorRadius,
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//! - gce_NegativeRadius if MajorRadius or
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//! MinorRadius is less than 0.0,
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//! - gce_NullAxis if points S1, S2 and Center are collinear, or
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//! - gce_InvertAxis if the major radius computed with
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//! Center and S1 is less than the minor radius
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//! computed with Center, S1 and S2.
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Standard_EXPORT gce_MakeElips2d(const gp_Pnt2d& S1, const gp_Pnt2d& S2, const gp_Pnt2d& Center);
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//! Returns the constructed ellipse.
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//! Exceptions StdFail_NotDone if no ellipse is constructed.
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Standard_EXPORT const gp_Elips2d& Value() const;
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Standard_EXPORT const gp_Elips2d& Operator() const;
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Standard_EXPORT operator gp_Elips2d() const;
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protected:
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private:
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gp_Elips2d TheElips2d;
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};
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#endif // _gce_MakeElips2d_HeaderFile
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