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88 lines
2.3 KiB
C++
88 lines
2.3 KiB
C++
// Created on: 1993-03-24
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// Created by: JCV
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// Copyright (c) 1993-1999 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 _Geom2d_BoundedCurve_HeaderFile
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#define _Geom2d_BoundedCurve_HeaderFile
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#include <Standard.hxx>
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#include <Standard_Type.hxx>
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#include <Geom2d_Curve.hxx>
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class gp_Pnt2d;
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class Geom2d_BoundedCurve;
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DEFINE_STANDARD_HANDLE(Geom2d_BoundedCurve, Geom2d_Curve)
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//! The abstract class BoundedCurve describes the
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//! common behavior of bounded curves in 2D space. A
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//! bounded curve is limited by two finite values of the
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//! parameter, termed respectively "first parameter" and
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//! "last parameter". The "first parameter" gives the "start
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//! point" of the bounded curve, and the "last parameter"
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//! gives the "end point" of the bounded curve.
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//! The length of a bounded curve is finite.
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//! The Geom2d package provides three concrete
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//! classes of bounded curves:
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//! - two frequently used mathematical formulations of complex curves:
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//! - Geom2d_BezierCurve,
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//! - Geom2d_BSplineCurve, and
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//! - Geom2d_TrimmedCurve to trim a curve, i.e. to
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//! only take part of the curve limited by two values of
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//! the parameter of the basis curve.
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class Geom2d_BoundedCurve : public Geom2d_Curve
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{
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public:
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//! Returns the end point of the curve.
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//! The end point is the value of the curve for the
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//! "LastParameter" of the curve.
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Standard_EXPORT virtual gp_Pnt2d EndPoint() const = 0;
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//! Returns the start point of the curve.
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//! The start point is the value of the curve for the
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//! "FirstParameter" of the curve.
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Standard_EXPORT virtual gp_Pnt2d StartPoint() const = 0;
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DEFINE_STANDARD_RTTIEXT(Geom2d_BoundedCurve,Geom2d_Curve)
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protected:
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private:
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};
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#endif // _Geom2d_BoundedCurve_HeaderFile
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