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74 lines
2.8 KiB
C++
74 lines
2.8 KiB
C++
// Created on: 1992-09-28
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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 _GC_MakeArcOfEllipse_HeaderFile
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#define _GC_MakeArcOfEllipse_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 <GC_Root.hxx>
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#include <Geom_TrimmedCurve.hxx>
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class gp_Elips;
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class gp_Pnt;
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//! Implements construction algorithms for an arc
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//! of ellipse in 3D space. The result is a Geom_TrimmedCurve curve.
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//! A MakeArcOfEllipse object provides a framework for:
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//! - defining the construction of the arc of ellipse,
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//! - implementing the construction algorithm, and
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//! - consulting the results. In particular, the
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//! Value function returns the constructed arc of ellipse.
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class GC_MakeArcOfEllipse : public GC_Root
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{
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public:
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DEFINE_STANDARD_ALLOC
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//! Constructs an arc of Ellipse (TrimmedCurve from Geom) from
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//! a Ellipse between two parameters Alpha1 and Alpha2.
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Standard_EXPORT GC_MakeArcOfEllipse(const gp_Elips& Elips, const Standard_Real Alpha1, const Standard_Real Alpha2, const Standard_Boolean Sense);
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//! Constructs an arc of Ellipse (TrimmedCurve from Geom) from
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//! a Ellipse between point <P> and the angle Alpha
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//! given in radians.
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Standard_EXPORT GC_MakeArcOfEllipse(const gp_Elips& Elips, const gp_Pnt& P, const Standard_Real Alpha, const Standard_Boolean Sense);
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//! Constructs an arc of Ellipse (TrimmedCurve from Geom) from
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//! a Ellipse between two points P1 and P2.
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//! The orientation of the arc of ellipse is:
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//! - the sense of Elips if Sense is true, or
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//! - the opposite sense if Sense is false.
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//! Notes:
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//! - Alpha1, Alpha2 and Alpha are angle values, given in radians.
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//! - IsDone always returns true.
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Standard_EXPORT GC_MakeArcOfEllipse(const gp_Elips& Elips, const gp_Pnt& P1, const gp_Pnt& P2, const Standard_Boolean Sense);
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//! Returns the constructed arc of ellipse.
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Standard_EXPORT const Handle(Geom_TrimmedCurve)& Value() const;
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operator const Handle(Geom_TrimmedCurve)& () const { return Value(); }
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private:
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Handle(Geom_TrimmedCurve) TheArc;
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};
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#endif // _GC_MakeArcOfEllipse_HeaderFile
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