include/opencascade/Geom_BoundedCurve.hxx

0001 // Created on: 1993-03-10
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 _Geom_BoundedCurve_HeaderFile
0018 #define _Geom_BoundedCurve_HeaderFile
0019
0020 #include <Standard.hxx>
0021 #include <Standard_Type.hxx>
0022
0023 #include <Geom_Curve.hxx>
0024 class gp_Pnt;
0025
0026 //! The abstract class BoundedCurve describes the
0027 //! common behavior of bounded curves in 3D 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 Geom package provides three concrete classes of bounded curves:
0035 //! - two frequently used mathematical formulations of complex curves:
0036 //! - Geom_BezierCurve,
0037 //! - Geom_BSplineCurve, and
0038 //! - Geom_TrimmedCurve to trim a curve, i.e. to only
0039 //! take part of the curve limited by two values of the
0040 //! parameter of the basis curve.
0041 class Geom_BoundedCurve : public Geom_Curve
0042 {
0043
0044 public:
0045   //! Returns the end point of the curve.
0046   Standard_EXPORT virtual gp_Pnt EndPoint() const = 0;
0047
0048   //! Returns the start point of the curve.
0049   Standard_EXPORT virtual gp_Pnt StartPoint() const = 0;
0050
0051   //! Dumps the content of me into the stream
0052   Standard_EXPORT void DumpJson(Standard_OStream& theOStream, int theDepth = -1) const override;
0053
0054   DEFINE_STANDARD_RTTIEXT(Geom_BoundedCurve, Geom_Curve)
0055 };
0056
0057 #endif // _Geom_BoundedCurve_HeaderFile