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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 | |
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77 | //! performs actual computation |
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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 |
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