include/opencascade/Geom2d_BoundedCurve.hxx

0001 // Created on: 1993-03-24
0002 // Created by: JCV
0003 // Copyright (c) 1993-1999 Matra Datavision
0004 // Copyright (c) 1999-2014 OPEN CASCADE SAS
0005 //
0006 // This file is part of Open CASCADE Technology software library.
0007 //
0008 // This library is free software; you can redistribute it and/or modify it under
0009 // the terms of the GNU Lesser General Public License version 2.1 as published
0010 // by the Free Software Foundation, with special exception defined in the file
0011 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
0012 // distribution for complete text of the license and disclaimer of any warranty.
0013 //
0014 // Alternatively, this file may be used under the terms of Open CASCADE
0015 // commercial license or contractual agreement.
0016
0017 #ifndef _Geom2d_BoundedCurve_HeaderFile
0018 #define _Geom2d_BoundedCurve_HeaderFile
0019
0020 #include <Standard.hxx>
0021 #include <Standard_Type.hxx>
0022
0023 #include <Geom2d_Curve.hxx>
0024 class gp_Pnt2d;
0025
0026 //! The abstract class BoundedCurve describes the
0027 //! common behavior of bounded curves in 2D space. A
0028 //! bounded curve is limited by two finite values of the
0029 //! parameter, termed respectively "first parameter" and
0030 //! "last parameter". The "first parameter" gives the "start
0031 //! point" of the bounded curve, and the "last parameter"
0032 //! gives the "end point" of the bounded curve.
0033 //! The length of a bounded curve is finite.
0034 //! The Geom2d package provides three concrete
0035 //! classes of bounded curves:
0036 //! - two frequently used mathematical formulations of complex curves:
0037 //! - Geom2d_BezierCurve,
0038 //! - Geom2d_BSplineCurve, and
0039 //! - Geom2d_TrimmedCurve to trim a curve, i.e. to
0040 //! only take part of the curve limited by two values of
0041 //! the parameter of the basis curve.
0042 class Geom2d_BoundedCurve : public Geom2d_Curve
0043 {
0044
0045 public:
0046   //! Returns the end point of the curve.
0047   //! The end point is the value of the curve for the
0048   //! "LastParameter" of the curve.
0049   Standard_EXPORT virtual gp_Pnt2d EndPoint() const = 0;
0050
0051   //! Returns the start point of the curve.
0052   //! The start point is the value of the curve for the
0053   //! "FirstParameter" of the curve.
0054   Standard_EXPORT virtual gp_Pnt2d StartPoint() const = 0;
0055
0056   //! Dumps the content of me into the stream
0057   Standard_EXPORT void DumpJson(Standard_OStream& theOStream, int theDepth = -1) const override;
0058
0059   DEFINE_STANDARD_RTTIEXT(Geom2d_BoundedCurve, Geom2d_Curve)
0060 };
0061
0062 #endif // _Geom2d_BoundedCurve_HeaderFile