1 // Created on: 1997-05-28
2 // Created by: Xavier BENVENISTE
3 // Copyright (c) 1997-1999 Matra Datavision
4 // Copyright (c) 1999-2014 OPEN CASCADE SAS
6 // This file is part of Open CASCADE Technology software library.
8 // This library is free software; you can redistribute it and/or modify it under
9 // the terms of the GNU Lesser General Public License version 2.1 as published
10 // by the Free Software Foundation, with special exception defined in the file
11 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
12 // distribution for complete text of the license and disclaimer of any warranty.
14 // Alternatively, this file may be used under the terms of Open CASCADE
15 // commercial license or contractual agreement.
17 #ifndef _GeomLib_CheckBSplineCurve_HeaderFile
18 #define _GeomLib_CheckBSplineCurve_HeaderFile
20 #include <Standard.hxx>
21 #include <Standard_DefineAlloc.hxx>
22 #include <Standard_Handle.hxx>
24 class Geom_BSplineCurve;
27 //! Checks for the end tangents : whether or not those
28 //! are reversed regarding the third or n-3rd control
29 class GeomLib_CheckBSplineCurve
36 Standard_EXPORT GeomLib_CheckBSplineCurve(const Handle(Geom_BSplineCurve)& Curve,
37 const Standard_Real Tolerance,
38 const Standard_Real AngularTolerance);
40 Standard_Boolean IsDone() const;
42 Standard_EXPORT void NeedTangentFix (Standard_Boolean& FirstFlag, Standard_Boolean& SecondFlag) const;
44 Standard_EXPORT void FixTangent (const Standard_Boolean FirstFlag, const Standard_Boolean LastFlag);
46 //! modifies the curve
47 //! by fixing the first or the last tangencies
49 //! if Index3D not in the Range [1,Nb3dSpaces]
50 //! if the Approx is not Done
51 Standard_EXPORT Handle(Geom_BSplineCurve) FixedTangent (const Standard_Boolean FirstFlag, const Standard_Boolean LastFlag);
64 void FixTangentOnCurve(Handle(Geom_BSplineCurve)& theCurve,
65 const Standard_Boolean FirstFlag,
66 const Standard_Boolean LastFlag);
69 Handle(Geom_BSplineCurve) myCurve;
70 Standard_Boolean myDone;
71 Standard_Boolean myFixFirstTangent;
72 Standard_Boolean myFixLastTangent;
73 Standard_Real myAngularTolerance;
74 Standard_Real myTolerance;
76 Standard_Integer myIndSecondPole;
77 Standard_Integer myIndPrelastPole;
81 #include <GeomLib_CheckBSplineCurve.lxx>
87 #endif // _GeomLib_CheckBSplineCurve_HeaderFile