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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> |
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25 | #include <Geom_TrimmedCurve.hxx> |
| 26 | |
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27 | class StdFail_NotDone; |
| 28 | class gp_Elips; |
| 29 | class gp_Pnt; |
| 30 | |
| 31 | |
| 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 |
| 40 | { |
| 41 | public: |
| 42 | |
| 43 | DEFINE_STANDARD_ALLOC |
| 44 | |
| 45 | |
| 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); |
| 49 | |
| 50 | //! Constructs an arc of Ellipse (TrimmedCurve from Geom) from |
| 51 | //! a Ellipse between point <P> and the angle Alpha |
| 52 | //! given in radians. |
| 53 | Standard_EXPORT GC_MakeArcOfEllipse(const gp_Elips& Elips, const gp_Pnt& P, const Standard_Real Alpha, const Standard_Boolean Sense); |
| 54 | |
| 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. |
| 60 | //! Notes: |
| 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); |
| 64 | |
| 65 | //! Returns the constructed arc of ellipse. |
| 66 | Standard_EXPORT const Handle(Geom_TrimmedCurve)& Value() const; |
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67 | |
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68 | operator const Handle(Geom_TrimmedCurve)& () const { return Value(); } |
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69 | |
| 70 | private: |
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71 | Handle(Geom_TrimmedCurve) TheArc; |
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72 | }; |
| 73 | |
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74 | #endif // _GC_MakeArcOfEllipse_HeaderFile |
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