| /*---------------------------------------------------------------------------*\ | |
| ========= | | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | |
| \\ / O peration | Website: https://openfoam.org | |
| \\ / A nd | Copyright (C) 2011-2025 OpenFOAM Foundation | |
| \\/ M anipulation | | |
| ------------------------------------------------------------------------------- | |
| License | |
| This file is part of OpenFOAM. | |
| OpenFOAM is free software: you can redistribute it and/or modify it | |
| under the terms of the GNU General Public License as published by | |
| the Free Software Foundation, either version 3 of the License, or | |
| (at your option) any later version. | |
| OpenFOAM is distributed in the hope that it will be useful, but WITHOUT | |
| ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| for more details. | |
| You should have received a copy of the GNU General Public License | |
| along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>. | |
| \*---------------------------------------------------------------------------*/ | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| template<class Type> | |
| inline Foam::DiagonalMatrix<Type>::DiagonalMatrix() | |
| : | |
| List<Type>() | |
| {} | |
| template<class Type> | |
| template<class Form> | |
| Foam::DiagonalMatrix<Type>::DiagonalMatrix(const Matrix<Form, Type>& a) | |
| : | |
| List<Type>(min(a.m(), a.n())) | |
| { | |
| forAll(*this, i) | |
| { | |
| this->operator[](i) = a(i, i); | |
| } | |
| } | |
| template<class Type> | |
| Foam::DiagonalMatrix<Type>::DiagonalMatrix(const label size) | |
| : | |
| List<Type>(size) | |
| {} | |
| template<class Type> | |
| Foam::DiagonalMatrix<Type>::DiagonalMatrix(const label size, const Type& val) | |
| : | |
| List<Type>(size, val) | |
| {} | |
| template<class Type> | |
| Foam::DiagonalMatrix<Type>::DiagonalMatrix(std::initializer_list<Type> lst) | |
| : | |
| List<Type>(lst) | |
| {} | |
| template<class Type> | |
| Foam::DiagonalMatrix<Type>::DiagonalMatrix(Istream& is) | |
| : | |
| List<Type>(is) | |
| {} | |
| // * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * // | |
| template<class Type> | |
| Foam::DiagonalMatrix<Type>& Foam::DiagonalMatrix<Type>::invert() | |
| { | |
| forAll(*this, i) | |
| { | |
| Type x = this->operator[](i); | |
| if (mag(x) < vSmall) | |
| { | |
| this->operator[](i) = Type(0); | |
| } | |
| else | |
| { | |
| this->operator[](i) = Type(1)/x; | |
| } | |
| } | |
| return this; | |
| } | |
| template<class Type> | |
| Foam::DiagonalMatrix<Type> Foam::inv(const DiagonalMatrix<Type>& A) | |
| { | |
| DiagonalMatrix<Type> Ainv = A; | |
| forAll(A, i) | |
| { | |
| Type x = A[i]; | |
| if (mag(x) < vSmall) | |
| { | |
| Ainv[i] = Type(0); | |
| } | |
| else | |
| { | |
| Ainv[i] = Type(1)/x; | |
| } | |
| } | |
| return Ainv; | |
| } | |
| // ************************************************************************* // | |