1 // Created on: 1992-02-20
2 // Created by: Remy GILET
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 _Geom2dGcc_FunctionTanCirCu_HeaderFile
18 #define _Geom2dGcc_FunctionTanCirCu_HeaderFile
20 #include <Standard.hxx>
21 #include <Standard_DefineAlloc.hxx>
22 #include <Standard_Handle.hxx>
24 #include <gp_Circ2d.hxx>
25 #include <Geom2dAdaptor_Curve.hxx>
26 #include <Standard_Real.hxx>
27 #include <math_FunctionWithDerivative.hxx>
28 #include <Standard_Boolean.hxx>
30 class Geom2dAdaptor_Curve;
33 //! This abstract class describes a Function of 1 Variable
34 //! used to find a line tangent to a curve and a circle.
35 class Geom2dGcc_FunctionTanCirCu : public math_FunctionWithDerivative
42 Standard_EXPORT Geom2dGcc_FunctionTanCirCu(const gp_Circ2d& Circ, const Geom2dAdaptor_Curve& Curv);
44 //! Computes the value of the function F for the variable X.
45 //! It returns True if the computation is successfully done,
47 Standard_EXPORT Standard_Boolean Value (const Standard_Real X, Standard_Real& F);
49 //! Computes the derivative of the function F for the variable X.
50 //! It returns True if the computation is successfully done,
52 Standard_EXPORT Standard_Boolean Derivative (const Standard_Real X, Standard_Real& Deriv);
54 //! Computes the value and the derivative of the function F
55 //! for the variable X.
56 //! It returns True if the computation is successfully done,
58 Standard_EXPORT Standard_Boolean Values (const Standard_Real X, Standard_Real& F, Standard_Real& Deriv);
74 Geom2dAdaptor_Curve Curve;
75 Standard_Real myWeight;
86 #endif // _Geom2dGcc_FunctionTanCirCu_HeaderFile