include/opencascade/GeomFill_TgtField.hxx

0001 // Created on: 1995-12-04
0002 // Created by: Laurent BOURESCHE
0003 // Copyright (c) 1995-1999 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 _GeomFill_TgtField_HeaderFile
0018 #define _GeomFill_TgtField_HeaderFile
0019
0020 #include <Standard.hxx>
0021 #include <Standard_Type.hxx>
0022
0023 #include <Standard_Transient.hxx>
0024 #include <Standard_Real.hxx>
0025 class Law_BSpline;
0026 class gp_Vec;
0027
0028 //! Root class defining the methods we need to make an
0029 //! algorithmic tangents field.
0030 class GeomFill_TgtField : public Standard_Transient
0031 {
0032
0033 public:
0034   Standard_EXPORT virtual bool IsScalable() const;
0035
0036   Standard_EXPORT virtual void Scale(const occ::handle<Law_BSpline>& Func);
0037
0038   //! Computes the value of the field of tangency at
0039   //! parameter W.
0040   Standard_EXPORT virtual gp_Vec Value(const double W) const = 0;
0041
0042   //! Computes the derivative of the field of tangency at
0043   //! parameter W.
0044   Standard_EXPORT virtual gp_Vec D1(const double W) const = 0;
0045
0046   //! Computes the value and the derivative of the field of
0047   //! tangency at parameter W.
0048   Standard_EXPORT virtual void D1(const double W, gp_Vec& V, gp_Vec& DV) const = 0;
0049
0050   DEFINE_STANDARD_RTTIEXT(GeomFill_TgtField, Standard_Transient)
0051 };
0052
0053 #endif // _GeomFill_TgtField_HeaderFile