include/opencascade/Convert_HyperbolaToBSplineCurve.hxx

0001 // Created on: 1991-10-10
0002 // Created by: Jean Claude VAUTHIER
0003 // Copyright (c) 1991-1999 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 _Convert_HyperbolaToBSplineCurve_HeaderFile
0018 #define _Convert_HyperbolaToBSplineCurve_HeaderFile
0019
0020 #include <Standard.hxx>
0021 #include <Standard_DefineAlloc.hxx>
0022 #include <Standard_Handle.hxx>
0023
0024 #include <Convert_ConicToBSplineCurve.hxx>
0025 class gp_Hypr2d;
0026
0027 //! This algorithm converts a hyperbola into a rational B-spline curve.
0028 //! The hyperbola is an Hypr2d from package gp with the
0029 //! parametrization :
0030 //! P (U) =
0031 //! Loc + (MajorRadius * std::cosh(U) * Xdir + MinorRadius * std::sinh(U) * Ydir)
0032 //! where Loc is the location point of the hyperbola, Xdir and Ydir are
0033 //! the normalized directions of the local cartesian coordinate system
0034 //! of the hyperbola.
0035 //! KeyWords :
0036 //! Convert, Hyperbola, BSplineCurve, 2D .
0037 class Convert_HyperbolaToBSplineCurve : public Convert_ConicToBSplineCurve
0038 {
0039 public:
0040   DEFINE_STANDARD_ALLOC
0041
0042   //! The hyperbola H is limited between the parametric values U1, U2
0043   //! and the equivalent B-spline curve has the same orientation as the
0044   //! hyperbola.
0045   Standard_EXPORT Convert_HyperbolaToBSplineCurve(const gp_Hypr2d& H,
0046                                                   const double     U1,
0047                                                   const double     U2);
0048 };
0049
0050 #endif // _Convert_HyperbolaToBSplineCurve_HeaderFile