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 5 // 6 // This file is part of Open CASCADE Technology software library. 7 // 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. 13 // 14 // Alternatively, this file may be used under the terms of Open CASCADE 15 // commercial license or contractual agreement. 16 17 #ifndef _math_FunctionWithDerivative_HeaderFile 18 #define _math_FunctionWithDerivative_HeaderFile 19 20 #include <Standard.hxx> 21 #include <Standard_DefineAlloc.hxx> 22 #include <Standard_Handle.hxx> 23 24 #include <math_Function.hxx> 25 #include <Standard_Boolean.hxx> 26 #include <Standard_Real.hxx> 27 28 29 30 //! This abstract class describes the virtual functions associated with 31 //! a function of a single variable for which the first derivative is 32 //! available. 33 class math_FunctionWithDerivative : public math_Function 34 { 35 public: 36 37 DEFINE_STANDARD_ALLOC 38 39 40 //! Computes the value <F>of the function for the variable <X>. 41 //! Returns True if the calculation were successfully done, 42 //! False otherwise. 43 Standard_EXPORT virtual Standard_Boolean Value (const Standard_Real X, Standard_Real& F) = 0; 44 45 //! Computes the derivative <D> of the function 46 //! for the variable <X>. 47 //! Returns True if the calculation were successfully done, 48 //! False otherwise. 49 Standard_EXPORT virtual Standard_Boolean Derivative (const Standard_Real X, Standard_Real& D) = 0; 50 51 //! Computes the value <F> and the derivative <D> of the 52 //! function for the variable <X>. 53 //! Returns True if the calculation were successfully done, 54 //! False otherwise. 55 Standard_EXPORT virtual Standard_Boolean Values (const Standard_Real X, Standard_Real& F, Standard_Real& D) = 0; 56 Standard_EXPORT virtual ~math_FunctionWithDerivative(); 57 58 59 60 61 protected: 62 63 64 65 66 67 private: 68 69 70 71 72 73 }; 74 75 76 77 78 79 80 81 #endif // _math_FunctionWithDerivative_HeaderFile 82