1 // Created on: 1992-09-28
2 // Created by: Remi GILET
3 // Copyright (c) 1992-1999 Matra Datavision
4 // Copyright (c) 1999-2014 OPEN CASCADE SAS
6 // This file is part of Open CASCADE Technology software library.
8 // This library is free software; you can redistribute it and/or modify it under
9 // the terms of the GNU Lesser General Public License version 2.1 as published
10 // by the Free Software Foundation, with special exception defined in the file
11 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
12 // distribution for complete text of the license and disclaimer of any warranty.
14 // Alternatively, this file may be used under the terms of Open CASCADE
15 // commercial license or contractual agreement.
17 #ifndef _GC_MakeArcOfEllipse_HeaderFile
18 #define _GC_MakeArcOfEllipse_HeaderFile
20 #include <Standard.hxx>
21 #include <Standard_DefineAlloc.hxx>
22 #include <Standard_Handle.hxx>
24 #include <GC_Root.hxx>
25 #include <Geom_TrimmedCurve.hxx>
27 class StdFail_NotDone;
32 //! Implements construction algorithms for an arc
33 //! of ellipse in 3D space. The result is a Geom_TrimmedCurve curve.
34 //! A MakeArcOfEllipse object provides a framework for:
35 //! - defining the construction of the arc of ellipse,
36 //! - implementing the construction algorithm, and
37 //! - consulting the results. In particular, the
38 //! Value function returns the constructed arc of ellipse.
39 class GC_MakeArcOfEllipse : public GC_Root
46 //! Constructs an arc of Ellipse (TrimmedCurve from Geom) from
47 //! a Ellipse between two parameters Alpha1 and Alpha2.
48 Standard_EXPORT GC_MakeArcOfEllipse(const gp_Elips& Elips, const Standard_Real Alpha1, const Standard_Real Alpha2, const Standard_Boolean Sense);
50 //! Constructs an arc of Ellipse (TrimmedCurve from Geom) from
51 //! a Ellipse between point <P> and the angle Alpha
53 Standard_EXPORT GC_MakeArcOfEllipse(const gp_Elips& Elips, const gp_Pnt& P, const Standard_Real Alpha, const Standard_Boolean Sense);
55 //! Constructs an arc of Ellipse (TrimmedCurve from Geom) from
56 //! a Ellipse between two points P1 and P2.
57 //! The orientation of the arc of ellipse is:
58 //! - the sense of Elips if Sense is true, or
59 //! - the opposite sense if Sense is false.
61 //! - Alpha1, Alpha2 and Alpha are angle values, given in radians.
62 //! - IsDone always returns true.
63 Standard_EXPORT GC_MakeArcOfEllipse(const gp_Elips& Elips, const gp_Pnt& P1, const gp_Pnt& P2, const Standard_Boolean Sense);
65 //! Returns the constructed arc of ellipse.
66 Standard_EXPORT const Handle(Geom_TrimmedCurve)& Value() const;
68 operator const Handle(Geom_TrimmedCurve)& () const { return Value(); }
71 Handle(Geom_TrimmedCurve) TheArc;
74 #endif // _GC_MakeArcOfEllipse_HeaderFile