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
0027 class Geom2d_BoundedCurve;
0028 DEFINE_STANDARD_HANDLE(Geom2d_BoundedCurve, Geom2d_Curve)
0029
0030 //! The abstract class BoundedCurve describes the
0031 //! common behavior of bounded curves in 2D space. A
0032 //! bounded curve is limited by two finite values of the
0033 //! parameter, termed respectively "first parameter" and
0034 //! "last parameter". The "first parameter" gives the "start
0035 //! point" of the bounded curve, and the "last parameter"
0036 //! gives the "end point" of the bounded curve.
0037 //! The length of a bounded curve is finite.
0038 //! The Geom2d package provides three concrete
0039 //! classes of bounded curves:
0040 //! - two frequently used mathematical formulations of complex curves:
0041 //! - Geom2d_BezierCurve,
0042 //! - Geom2d_BSplineCurve, and
0043 //! - Geom2d_TrimmedCurve to trim a curve, i.e. to
0044 //! only take part of the curve limited by two values of
0045 //! the parameter of the basis curve.
0046 class Geom2d_BoundedCurve : public Geom2d_Curve
0047 {
0048
0049 public:
0050
0051
0052
0053   //! Returns the end point of the curve.
0054   //! The end point is the value of the curve for the
0055   //! "LastParameter" of the curve.
0056   Standard_EXPORT virtual gp_Pnt2d EndPoint() const = 0;
0057
0058
0059   //! Returns the start point of the curve.
0060   //! The start point is the value of the curve for the
0061   //! "FirstParameter" of the curve.
0062   Standard_EXPORT virtual gp_Pnt2d StartPoint() const = 0;
0063
0064   //! Dumps the content of me into the stream
0065   Standard_EXPORT virtual void DumpJson (Standard_OStream& theOStream, Standard_Integer theDepth = -1) const Standard_OVERRIDE;
0066
0067
0068
0069
0070   DEFINE_STANDARD_RTTIEXT(Geom2d_BoundedCurve,Geom2d_Curve)
0071
0072 protected:
0073
0074
0075
0076
0077 private:
0078
0079
0080
0081
0082 };
0083
0084
0085
0086
0087
0088
0089
0090 #endif // _Geom2d_BoundedCurve_HeaderFile