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1 | // Created on: 2005-12-15 |
| 2 | // Created by: Julia GERASIMOVA |
| 3 | // Copyright (c) 2005-2014 OPEN CASCADE SAS |
| 4 | // |
| 5 | // This file is part of Open CASCADE Technology software library. |
| 6 | // |
| 7 | // This library is free software; you can redistribute it and/or modify it under |
| 8 | // the terms of the GNU Lesser General Public License version 2.1 as published |
| 9 | // by the Free Software Foundation, with special exception defined in the file |
| 10 | // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT |
| 11 | // distribution for complete text of the license and disclaimer of any warranty. |
| 12 | // |
| 13 | // Alternatively, this file may be used under the terms of Open CASCADE |
| 14 | // commercial license or contractual agreement. |
| 15 | |
| 16 | #ifndef _math_EigenValuesSearcher_HeaderFile |
| 17 | #define _math_EigenValuesSearcher_HeaderFile |
| 18 | |
| 19 | #include <Standard.hxx> |
| 20 | #include <Standard_DefineAlloc.hxx> |
| 21 | #include <Standard_Handle.hxx> |
| 22 | |
| 23 | #include <TColStd_HArray1OfReal.hxx> |
| 24 | #include <Standard_Boolean.hxx> |
| 25 | #include <Standard_Integer.hxx> |
| 26 | #include <TColStd_HArray2OfReal.hxx> |
| 27 | #include <TColStd_Array1OfReal.hxx> |
| 28 | #include <Standard_Real.hxx> |
| 29 | #include <math_Vector.hxx> |
| 30 | class StdFail_NotDone; |
| 31 | |
| 32 | |
| 33 | //! This class finds eigen values and vectors of |
| 34 | //! real symmetric tridiagonal matrix |
| 35 | class math_EigenValuesSearcher |
| 36 | { |
| 37 | public: |
| 38 | |
| 39 | DEFINE_STANDARD_ALLOC |
| 40 | |
| 41 | |
| 42 | Standard_EXPORT math_EigenValuesSearcher(const TColStd_Array1OfReal& Diagonal, const TColStd_Array1OfReal& Subdiagonal); |
| 43 | |
| 44 | //! Returns Standard_True if computation is performed |
| 45 | //! successfully. |
| 46 | Standard_EXPORT Standard_Boolean IsDone() const; |
| 47 | |
| 48 | //! Returns the dimension of matrix |
| 49 | Standard_EXPORT Standard_Integer Dimension() const; |
| 50 | |
| 51 | //! Returns the Index_th eigen value of matrix |
| 52 | //! Index must be in [1, Dimension()] |
| 53 | Standard_EXPORT Standard_Real EigenValue (const Standard_Integer Index) const; |
| 54 | |
| 55 | //! Returns the Index_th eigen vector of matrix |
| 56 | //! Index must be in [1, Dimension()] |
| 57 | Standard_EXPORT math_Vector EigenVector (const Standard_Integer Index) const; |
| 58 | |
| 59 | |
| 60 | |
| 61 | |
| 62 | protected: |
| 63 | |
| 64 | |
| 65 | |
| 66 | |
| 67 | |
| 68 | private: |
| 69 | |
| 70 | |
| 71 | |
| 72 | Handle(TColStd_HArray1OfReal) myDiagonal; |
| 73 | Handle(TColStd_HArray1OfReal) mySubdiagonal; |
| 74 | Standard_Boolean myIsDone; |
| 75 | Standard_Integer myN; |
| 76 | Handle(TColStd_HArray1OfReal) myEigenValues; |
| 77 | Handle(TColStd_HArray2OfReal) myEigenVectors; |
| 78 | |
| 79 | |
| 80 | }; |
| 81 | |
| 82 | |
| 83 | |
| 84 | |
| 85 | |
| 86 | |
| 87 | |
| 88 | #endif // _math_EigenValuesSearcher_HeaderFile |
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