1 // Created on: 1991-05-13
2 // Created by: Laurent PAINNOT
3 // Copyright (c) 1991-1999 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 _math_FunctionSet_HeaderFile
18 #define _math_FunctionSet_HeaderFile
20 #include <Standard.hxx>
21 #include <Standard_DefineAlloc.hxx>
22 #include <Standard_Handle.hxx>
24 #include <math_Vector.hxx>
28 //! This abstract class describes the virtual functions associated to
29 //! a set on N Functions of M independent variables.
30 class math_FunctionSet
37 //! Returns the number of variables of the function.
38 Standard_EXPORT virtual Standard_Integer NbVariables() const = 0;
40 //! Returns the number of equations of the function.
41 Standard_EXPORT virtual Standard_Integer NbEquations() const = 0;
43 //! Computes the values <F> of the functions for the
45 //! returns True if the computation was done successfully,
47 Standard_EXPORT virtual Standard_Boolean Value (const math_Vector& X, math_Vector& F) = 0;
49 //! Returns the state of the function corresponding to the
50 //! latestcall of any methods associated with the function.
51 //! This function is called by each of the algorithms
52 //! described later which define the function Integer
53 //! Algorithm::StateNumber(). The algorithm has the
54 //! responsibility to call this function when it has found
55 //! a solution (i.e. a root or a minimum) and has to maintain
56 //! the association between the solution found and this
58 //! Byu default, this method returns 0 (which means for the
59 //! algorithm: no state has been saved). It is the
60 //! responsibility of the programmer to decide if he needs
61 //! to save the current state of the function and to return
62 //! an Integer that allows retrieval of the state.
63 Standard_EXPORT virtual Standard_Integer GetStateNumber();
64 Standard_EXPORT virtual ~math_FunctionSet();
89 #endif // _math_FunctionSet_HeaderFile