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_FunctionTanCuCu_HeaderFile
18 #define _Geom2dGcc_FunctionTanCuCu_HeaderFile
20 #include <Standard.hxx>
21 #include <Standard_DefineAlloc.hxx>
22 #include <Standard_Handle.hxx>
24 #include <Geom2dAdaptor_Curve.hxx>
25 #include <gp_Circ2d.hxx>
26 #include <Geom2dGcc_Type3.hxx>
27 #include <math_FunctionSetWithDerivatives.hxx>
28 #include <math_Vector.hxx>
29 #include <Standard_Integer.hxx>
30 #include <Standard_Boolean.hxx>
31 class Standard_ConstructionError;
32 class Geom2dAdaptor_Curve;
39 //! This abstract class describes a Function of 1 Variable
40 //! used to find a line tangent to two curves.
41 class Geom2dGcc_FunctionTanCuCu : public math_FunctionSetWithDerivatives
48 Standard_EXPORT Geom2dGcc_FunctionTanCuCu(const Geom2dAdaptor_Curve& Curv1, const Geom2dAdaptor_Curve& Curv2);
50 Standard_EXPORT Geom2dGcc_FunctionTanCuCu(const gp_Circ2d& Circ1, const Geom2dAdaptor_Curve& Curv2);
52 Standard_EXPORT void InitDerivative (const math_Vector& X, gp_Pnt2d& Point1, gp_Pnt2d& Point2, gp_Vec2d& Tan1, gp_Vec2d& Tan2, gp_Vec2d& D21, gp_Vec2d& D22);
54 //! returns the number of variables of the function.
55 Standard_EXPORT Standard_Integer NbVariables() const;
57 //! returns the number of equations of the function.
58 Standard_EXPORT Standard_Integer NbEquations() const;
60 //! Computes the value of the function F for the variable X.
61 //! It returns True if the computation is successfully done,
63 Standard_EXPORT Standard_Boolean Value (const math_Vector& X, math_Vector& F);
65 //! Computes the derivative of the function F for the variable X.
66 //! It returns True if the computation is successfully done,
68 Standard_EXPORT Standard_Boolean Derivatives (const math_Vector& X, math_Matrix& Deriv);
70 //! Computes the value and the derivative of the function F
71 //! for the variable X.
72 //! It returns True if the computation is successfully done,
74 Standard_EXPORT Standard_Boolean Values (const math_Vector& X, math_Vector& F, math_Matrix& Deriv);
89 Geom2dAdaptor_Curve TheCurve1;
90 Geom2dAdaptor_Curve TheCurve2;
92 Geom2dGcc_Type3 TheType;
103 #endif // _Geom2dGcc_FunctionTanCuCu_HeaderFile