include/opencascade/GeomLib_Check2dBSplineCurve.hxx

0001 // Created on: 1997-05-28
0002 // Created by: Xavier BENVENISTE
0003 // Copyright (c) 1997-1999 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 _GeomLib_Check2dBSplineCurve_HeaderFile
0018 #define _GeomLib_Check2dBSplineCurve_HeaderFile
0019
0020 #include <Standard.hxx>
0021 #include <Standard_DefineAlloc.hxx>
0022 #include <Standard_Handle.hxx>
0023
0024 class Geom2d_BSplineCurve;
0025
0026
0027 //! Checks for the end  tangents : whether or not those
0028 //! are reversed
0029 class GeomLib_Check2dBSplineCurve
0030 {
0031 public:
0032
0033   DEFINE_STANDARD_ALLOC
0034
0035
0036   Standard_EXPORT GeomLib_Check2dBSplineCurve(const Handle(Geom2d_BSplineCurve)& Curve,
0037                                               const Standard_Real Tolerance,
0038                                               const Standard_Real AngularTolerance);
0039
0040     Standard_Boolean IsDone() const;
0041
0042   Standard_EXPORT void NeedTangentFix (Standard_Boolean& FirstFlag, Standard_Boolean& SecondFlag) const;
0043
0044   Standard_EXPORT void FixTangent (const Standard_Boolean FirstFlag, const Standard_Boolean LastFlag);
0045
0046   //! modifies the curve
0047   //! by fixing the first or the last tangencies
0048   //!
0049   //! if Index3D not in the Range [1,Nb3dSpaces]
0050   //! if the Approx is not Done
0051   Standard_EXPORT Handle(Geom2d_BSplineCurve) FixedTangent (const Standard_Boolean FirstFlag, const Standard_Boolean LastFlag);
0052
0053
0054
0055
0056 protected:
0057
0058
0059
0060
0061
0062 private:
0063
0064   void FixTangentOnCurve(Handle(Geom2d_BSplineCurve)& theCurve,
0065                          const Standard_Boolean FirstFlag,
0066                          const Standard_Boolean LastFlag);
0067
0068
0069   Handle(Geom2d_BSplineCurve) myCurve;
0070   Standard_Boolean myDone;
0071   Standard_Boolean myFixFirstTangent;
0072   Standard_Boolean myFixLastTangent;
0073   Standard_Real myAngularTolerance;
0074   Standard_Real myTolerance;
0075
0076   Standard_Integer myIndSecondPole;
0077   Standard_Integer myIndPrelastPole;
0078 };
0079
0080
0081 #include <GeomLib_Check2dBSplineCurve.lxx>
0082
0083
0084
0085
0086
0087 #endif // _GeomLib_Check2dBSplineCurve_HeaderFile