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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2013-2020 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/>.
\*---------------------------------------------------------------------------*/
#include "SquareMatrix.H"
#include "labelList.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
template<class Type>
Foam::scalar Foam::detDecomposed
(
const SquareMatrix<Type>& matrix,
const label sign
)
{
Type diagProduct = pTraits<Type>::one;
for (label i=0; i<matrix.m(); i++)
{
diagProduct *= matrix(i, i);
}
return sign*diagProduct;
}
template<class Type>
Foam::scalar Foam::det(const SquareMatrix<Type>& matrix)
{
SquareMatrix<Type> matrixTmp = matrix;
labelList pivotIndices(matrix.m());
label sign;
LUDecompose(matrixTmp, pivotIndices, sign);
return detDecomposed(matrixTmp, sign);
}
template<class Type>
Foam::scalar Foam::det(SquareMatrix<Type>& matrix)
{
labelList pivotIndices(matrix.m());
label sign;
LUDecompose(matrix, pivotIndices, sign);
return detDecomposed(matrix, sign);
}
// ************************************************************************* //
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