include/opencascade/IntImpParGen_ImpTool.hxx

0001 // Created on: 1992-03-26
0002 // Created by: Laurent BUCHARD
0003 // Copyright (c) 1992-1999 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 _IntImpParGen_ImpTool_HeaderFile
0018 #define _IntImpParGen_ImpTool_HeaderFile
0019
0020 #include <Standard.hxx>
0021 #include <Standard_DefineAlloc.hxx>
0022 #include <Standard_Handle.hxx>
0023
0024 #include <Standard_Real.hxx>
0025 class gp_Pnt2d;
0026 class gp_Vec2d;
0027
0028
0029 //! Template class for an implicit curve.
0030 class IntImpParGen_ImpTool
0031 {
0032 public:
0033
0034   DEFINE_STANDARD_ALLOC
0035
0036
0037   Standard_EXPORT gp_Pnt2d Value (const Standard_Real U) const;
0038
0039   Standard_EXPORT void D1 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& T) const;
0040
0041   Standard_EXPORT void D2 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& T, gp_Vec2d& N) const;
0042
0043   //! Computes the value of the signed distance between
0044   //! the point P and the implicit curve.
0045   Standard_EXPORT Standard_Real Distance (const gp_Pnt2d& P) const;
0046
0047   //! Computes the Gradient of the Signed Distance
0048   //! between a point and the implicit curve, at the
0049   //! point P.
0050   Standard_EXPORT gp_Vec2d GradDistance (const gp_Pnt2d& P) const;
0051
0052   //! Returns the parameter U of the point on the
0053   //! implicit curve corresponding to the point P.
0054   //! The correspondence between P and the point P(U) on
0055   //! the implicit curve must be coherent with the way
0056   //! of determination of the signed distance.
0057   Standard_EXPORT Standard_Real FindParameter (const gp_Pnt2d& P) const;
0058
0059
0060
0061
0062 protected:
0063
0064
0065
0066
0067
0068 private:
0069
0070
0071
0072
0073
0074 };
0075
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0081
0082 #endif // _IntImpParGen_ImpTool_HeaderFile