1 // Created on: 1995-12-04
2 // Created by: Laurent BOURESCHE
3 // Copyright (c) 1995-1999 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 _GeomFill_TgtField_HeaderFile
18 #define _GeomFill_TgtField_HeaderFile
20 #include <Standard.hxx>
21 #include <Standard_Type.hxx>
23 #include <Standard_Transient.hxx>
24 #include <Standard_Boolean.hxx>
25 #include <Standard_Real.hxx>
30 class GeomFill_TgtField;
31 DEFINE_STANDARD_HANDLE(GeomFill_TgtField, Standard_Transient)
33 //! Root class defining the methods we need to make an
34 //! algorithmic tangents field.
35 class GeomFill_TgtField : public Standard_Transient
41 Standard_EXPORT virtual Standard_Boolean IsScalable() const;
43 Standard_EXPORT virtual void Scale (const Handle(Law_BSpline)& Func);
45 //! Computes the value of the field of tangency at
47 Standard_EXPORT virtual gp_Vec Value (const Standard_Real W) const = 0;
49 //! Computes the derivative of the field of tangency at
51 Standard_EXPORT virtual gp_Vec D1 (const Standard_Real W) const = 0;
53 //! Computes the value and the derivative of the field of
54 //! tangency at parameter W.
55 Standard_EXPORT virtual void D1 (const Standard_Real W, gp_Vec& V, gp_Vec& DV) const = 0;
60 DEFINE_STANDARD_RTTIEXT(GeomFill_TgtField,Standard_Transient)
80 #endif // _GeomFill_TgtField_HeaderFile