1 // Created on: 1991-05-14 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_GaussSingleIntegration_HeaderFile 18 #define _math_GaussSingleIntegration_HeaderFile 19 20 #include <Standard.hxx> 21 #include <Standard_DefineAlloc.hxx> 22 #include <Standard_Handle.hxx> 23 24 #include <Standard_Real.hxx> 25 #include <Standard_Boolean.hxx> 26 #include <Standard_Integer.hxx> 27 #include <Standard_OStream.hxx> 28 class StdFail_NotDone; 29 class math_Function; 30 31 32 33 //! This class implements the integration of a function of a single variable 34 //! between the parameter bounds Lower and Upper. 35 //! Warning: Order must be inferior or equal to 61. 36 class math_GaussSingleIntegration 37 { 38 public: 39 40 DEFINE_STANDARD_ALLOC 41 42 43 Standard_EXPORT math_GaussSingleIntegration(); 44 45 46 //! The Gauss-Legendre integration with N = Order points of integration, 47 //! is done on the function F between the bounds Lower and Upper. 48 Standard_EXPORT math_GaussSingleIntegration(math_Function& F, const Standard_Real Lower, const Standard_Real Upper, const Standard_Integer Order); 49 50 51 //! The Gauss-Legendre integration with N = Order points of integration and 52 //! given tolerance = Tol is done on the function F between the bounds 53 //! Lower and Upper. 54 Standard_EXPORT math_GaussSingleIntegration(math_Function& F, const Standard_Real Lower, const Standard_Real Upper, const Standard_Integer Order, const Standard_Real Tol); 55 56 //! returns True if all has been correctly done. 57 Standard_Boolean IsDone() const; 58 59 //! returns the value of the integral. 60 Standard_Real Value() const; 61 62 //! Prints information on the current state of the object. 63 Standard_EXPORT void Dump (Standard_OStream& o) const; 64 65 66 67 68 protected: 69 70 71 72 73 74 private: 75 76 77 //! performs actual computation 78 Standard_EXPORT void Perform (math_Function& F, const Standard_Real Lower, const Standard_Real Upper, const Standard_Integer Order); 79 80 81 Standard_Real Val; 82 Standard_Boolean Done; 83 84 85 }; 86 87 88 #include <math_GaussSingleIntegration.lxx> 89 90 91 92 93 94 #endif // _math_GaussSingleIntegration_HeaderFile 95