1 // Created on: 1992-03-26
2 // Created by: Laurent BUCHARD
3 // Copyright (c) 1992-1999 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 _IntImpParGen_ImpTool_HeaderFile
18 #define _IntImpParGen_ImpTool_HeaderFile
20 #include <Standard.hxx>
21 #include <Standard_DefineAlloc.hxx>
22 #include <Standard_Handle.hxx>
24 #include <Standard_Real.hxx>
29 //! Template class for an implicit curve.
30 class IntImpParGen_ImpTool
37 Standard_EXPORT gp_Pnt2d Value (const Standard_Real U) const;
39 Standard_EXPORT void D1 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& T) const;
41 Standard_EXPORT void D2 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& T, gp_Vec2d& N) const;
43 //! Computes the value of the signed distance between
44 //! the point P and the implicit curve.
45 Standard_EXPORT Standard_Real Distance (const gp_Pnt2d& P) const;
47 //! Computes the Gradient of the Signed Distance
48 //! between a point and the implicit curve, at the
50 Standard_EXPORT gp_Vec2d GradDistance (const gp_Pnt2d& P) const;
52 //! Returns the parameter U of the point on the
53 //! implicit curve corresponding to the point P.
54 //! The correspondance between P and the point P(U) on
55 //! the implicit curve must be coherent with the way
56 //! of determination of the signed distance.
57 Standard_EXPORT Standard_Real FindParameter (const gp_Pnt2d& P) const;
82 #endif // _IntImpParGen_ImpTool_HeaderFile