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100 lines
2.8 KiB
C++
100 lines
2.8 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_MakeElips_HeaderFile
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#define _gce_MakeElips_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_Elips.hxx>
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#include <gce_Root.hxx>
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class gp_Ax2;
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class gp_Pnt;
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//! This class implements the following algorithms used to
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//! create an ellipse 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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class gce_MakeElips : public gce_Root
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{
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public:
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DEFINE_STANDARD_ALLOC
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//! The major radius of the ellipse is on the "XAxis" and the
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//! minor radius is on the "YAxis" of the ellipse. The "XAxis"
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//! is defined with the "XDirection" of A2 and the "YAxis" is
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//! defined with the "YDirection" of A2.
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//! Warnings :
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//! It is not forbidden to create an ellipse with
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//! MajorRadius = MinorRadius.
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Standard_EXPORT gce_MakeElips(const gp_Ax2& A2, const Standard_Real MajorRadius, const Standard_Real MinorRadius);
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//! Make an ellipse with its center and two points.
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//! Warning
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//! The MakeElips class does not prevent the
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//! construction of an ellipse where the MajorRadius is
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//! equal to the MinorRadius.
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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 MinorRadius is less than 0.0;
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//! - gce_NullAxis if the points S1 and Center are coincident; or
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//! - gce_InvertAxis if:
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//! - the major radius computed with Center and S1
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//! is less than the minor radius computed with Center, S1 and S2, or
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//! - Center, S1 and S2 are collinear.
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Standard_EXPORT gce_MakeElips(const gp_Pnt& S1, const gp_Pnt& S2, const gp_Pnt& 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_Elips& Value() const;
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Standard_EXPORT const gp_Elips& Operator() const;
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Standard_EXPORT operator gp_Elips() const;
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protected:
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private:
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gp_Elips TheElips;
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};
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#endif // _gce_MakeElips_HeaderFile
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