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 class MakeArcOfEllipse from GCE2d inherits Root from GCE2d
18 ---Purpose: Implements construction algorithms for an arc of
19 -- ellipse in the plane. The result is a Geom2d_TrimmedCurve curve.
20 -- A MakeArcOfEllipse object provides a framework for:
21 -- - defining the construction of the arc of ellipse,
22 -- - implementing the construction algorithm, and
23 -- - consulting the results. In particular, the Value
24 -- function returns the constructed arc of ellipse.
29 Boolean from Standard,
30 TrimmedCurve from Geom2d
32 raises NotDone from StdFail
36 Create(Elips : Elips2d from gp ;
37 Alpha1, Alpha2 : Real from Standard ;
38 Sense : Boolean from Standard = Standard_True)
39 returns MakeArcOfEllipse;
40 ---Purpose: Make an arc of Ellipse (TrimmedCurve from Geom2d) from
41 -- a Ellipse between two parameters Alpha1 and Alpha2.
43 Create(Elips : Elips2d from gp ;
45 Alpha : Real from Standard ;
46 Sense : Boolean from Standard = Standard_True)
47 returns MakeArcOfEllipse;
48 ---Purpose: Make an arc of Ellipse (TrimmedCurve from Geom2d) from
49 -- a Ellipse between point <P> and the parameter
52 Create(Elips : Elips2d from gp ;
55 Sense : Boolean from Standard = Standard_True)
56 returns MakeArcOfEllipse;
57 ---Purpose: Make an arc of Ellipse (TrimmedCurve from Geom2d) from
58 -- a Ellipse between two points P1 and P2.
59 -- Please, note: The orientation of the arc is:
60 -- - the trigonometric sense if Sense is not defined or
61 -- is true (default value), or
62 -- - the opposite sense if Sense is false.
63 -- - Alpha1, Alpha2 and Alpha are angle values, given in radians.
64 -- - IsDone always returns true.
66 Value(me) returns TrimmedCurve from Geom2d
70 ---Purpose: Returns the constructed arc of ellipse.
71 ---C++: alias "operator const Handle(Geom2d_TrimmedCurve)& () const { return Value(); }"
75 TheArc : TrimmedCurve from Geom2d;
76 --The solution from Geom2d.