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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 |
5 | // |
6 | // This file is part of Open CASCADE Technology software library. |
7 | // |
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. |
13 | // |
14 | // Alternatively, this file may be used under the terms of Open CASCADE |
15 | // commercial license or contractual agreement. |
16 | |
17 | #ifndef _GC_MakeArcOfEllipse_HeaderFile |
18 | #define _GC_MakeArcOfEllipse_HeaderFile |
19 | |
20 | #include <Standard.hxx> |
21 | #include <Standard_DefineAlloc.hxx> |
22 | #include <Standard_Handle.hxx> |
23 | |
24 | #include <GC_Root.hxx> |
25 | #include <Standard_Real.hxx> |
26 | #include <Standard_Boolean.hxx> |
27 | class Geom_TrimmedCurve; |
28 | class StdFail_NotDone; |
29 | class gp_Elips; |
30 | class gp_Pnt; |
31 | |
32 | |
33 | //! Implements construction algorithms for an arc |
34 | //! of ellipse in 3D space. The result is a Geom_TrimmedCurve curve. |
35 | //! A MakeArcOfEllipse object provides a framework for: |
36 | //! - defining the construction of the arc of ellipse, |
37 | //! - implementing the construction algorithm, and |
38 | //! - consulting the results. In particular, the |
39 | //! Value function returns the constructed arc of ellipse. |
40 | class GC_MakeArcOfEllipse : public GC_Root |
41 | { |
42 | public: |
43 | |
44 | DEFINE_STANDARD_ALLOC |
45 | |
46 | |
47 | //! Constructs an arc of Ellipse (TrimmedCurve from Geom) from |
48 | //! a Ellipse between two parameters Alpha1 and Alpha2. |
49 | Standard_EXPORT GC_MakeArcOfEllipse(const gp_Elips& Elips, const Standard_Real Alpha1, const Standard_Real Alpha2, const Standard_Boolean Sense); |
50 | |
51 | //! Constructs an arc of Ellipse (TrimmedCurve from Geom) from |
52 | //! a Ellipse between point <P> and the angle Alpha |
53 | //! given in radians. |
54 | Standard_EXPORT GC_MakeArcOfEllipse(const gp_Elips& Elips, const gp_Pnt& P, const Standard_Real Alpha, const Standard_Boolean Sense); |
55 | |
56 | //! Constructs an arc of Ellipse (TrimmedCurve from Geom) from |
57 | //! a Ellipse between two points P1 and P2. |
58 | //! The orientation of the arc of ellipse is: |
59 | //! - the sense of Elips if Sense is true, or |
60 | //! - the opposite sense if Sense is false. |
61 | //! Notes: |
62 | //! - Alpha1, Alpha2 and Alpha are angle values, given in radians. |
63 | //! - IsDone always returns true. |
64 | Standard_EXPORT GC_MakeArcOfEllipse(const gp_Elips& Elips, const gp_Pnt& P1, const gp_Pnt& P2, const Standard_Boolean Sense); |
65 | |
66 | //! Returns the constructed arc of ellipse. |
67 | Standard_EXPORT const Handle(Geom_TrimmedCurve)& Value() const; |
68 | operator const Handle(Geom_TrimmedCurve)& () const { return Value(); } |
69 | |
70 | |
71 | |
72 | |
73 | protected: |
74 | |
75 | |
76 | |
77 | |
78 | |
79 | private: |
80 | |
81 | |
82 | |
83 | Handle(Geom_TrimmedCurve) TheArc; |
84 | |
85 | |
86 | }; |
87 | |
88 | |
89 | |
90 | |
91 | |
92 | |
93 | |
94 | #endif // _GC_MakeArcOfEllipse_HeaderFile |