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 class Geom2d_BoundedCurve;
0027 DEFINE_STANDARD_HANDLE(Geom2d_BoundedCurve, Geom2d_Curve)
0028
0029 //! The abstract class BoundedCurve describes the
0030 //! common behavior of bounded curves in 2D space. A
0031 //! bounded curve is limited by two finite values of the
0032 //! parameter, termed respectively "first parameter" and
0033 //! "last parameter". The "first parameter" gives the "start
0034 //! point" of the bounded curve, and the "last parameter"
0035 //! gives the "end point" of the bounded curve.
0036 //! The length of a bounded curve is finite.
0037 //! The Geom2d package provides three concrete
0038 //! classes of bounded curves:
0039 //! - two frequently used mathematical formulations of complex curves:
0040 //! - Geom2d_BezierCurve,
0041 //! - Geom2d_BSplineCurve, and
0042 //! - Geom2d_TrimmedCurve to trim a curve, i.e. to
0043 //! only take part of the curve limited by two values of
0044 //! the parameter of the basis curve.
0045 class Geom2d_BoundedCurve : public Geom2d_Curve
0046 {
0047
0048 public:
0049   //! Returns the end point of the curve.
0050   //! The end point is the value of the curve for the
0051   //! "LastParameter" of the curve.
0052   Standard_EXPORT virtual gp_Pnt2d EndPoint() const = 0;
0053
0054   //! Returns the start point of the curve.
0055   //! The start point is the value of the curve for the
0056   //! "FirstParameter" of the curve.
0057   Standard_EXPORT virtual gp_Pnt2d StartPoint() const = 0;
0058
0059   //! Dumps the content of me into the stream
0060   Standard_EXPORT virtual void DumpJson(Standard_OStream& theOStream,
0061                                         Standard_Integer  theDepth = -1) const Standard_OVERRIDE;
0062
0063   DEFINE_STANDARD_RTTIEXT(Geom2d_BoundedCurve, Geom2d_Curve)
0064
0065 protected:
0066 private:
0067 };
0068
0069 #endif // _Geom2d_BoundedCurve_HeaderFile