include/opencascade/Geom2dLProp_FuncCurExt.hxx

0001 // Created on: 1994-09-02
0002 // Created by: Yves FRICAUD
0003 // Copyright (c) 1994-1999 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 _Geom2dLProp_FuncCurExt_HeaderFile
0018 #define _Geom2dLProp_FuncCurExt_HeaderFile
0019
0020 #include <Standard.hxx>
0021 #include <Standard_DefineAlloc.hxx>
0022 #include <Standard_Handle.hxx>
0023
0024 #include <math_FunctionWithDerivative.hxx>
0025 class Geom2d_Curve;
0026
0027
0028 //! Function used to find the extremas of curvature in 2d.
0029 class Geom2dLProp_FuncCurExt  : public math_FunctionWithDerivative
0030 {
0031 public:
0032
0033   DEFINE_STANDARD_ALLOC
0034
0035
0036   Standard_EXPORT Geom2dLProp_FuncCurExt(const Handle(Geom2d_Curve)& C, const Standard_Real Tol);
0037
0038   //! Returns the value for the variable <X>.
0039   Standard_EXPORT Standard_Boolean Value (const Standard_Real X, Standard_Real& F);
0040
0041   //! Returns the derivative for the variable <X>.
0042   Standard_EXPORT Standard_Boolean Derivative (const Standard_Real X, Standard_Real& D);
0043
0044   //! Returns the value of the function and the derivative
0045   //! for the variable <X>.
0046   Standard_EXPORT Standard_Boolean Values (const Standard_Real X, Standard_Real& F, Standard_Real& D);
0047
0048   //! True  if  Param  corresponds  to  a minus
0049   //! of the radius of curvature.
0050   Standard_EXPORT Standard_Boolean IsMinKC (const Standard_Real Param) const;
0051
0052
0053
0054
0055 protected:
0056
0057
0058
0059
0060
0061 private:
0062
0063
0064
0065   Handle(Geom2d_Curve) theCurve;
0066   Standard_Real epsX;
0067
0068
0069 };
0070
0071
0072
0073
0074
0075
0076
0077 #endif // _Geom2dLProp_FuncCurExt_HeaderFile