mirror of
https://github.com/OPM/opm-simulators.git
synced 2024-11-26 03:00:17 -06:00
75 lines
2.0 KiB
C++
75 lines
2.0 KiB
C++
/*
|
|
Copyright 2017 IRIS AS
|
|
|
|
This file is part of the Open Porous Media Project (OPM).
|
|
|
|
OPM 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.
|
|
|
|
OPM 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 OPM. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <config.h>
|
|
|
|
#define BOOST_TEST_MODULE InvertSpecializationTest
|
|
#include <boost/test/unit_test.hpp>
|
|
#include <opm/simulators/linalg/MatrixBlock.hpp>
|
|
|
|
|
|
void checkIdentity(Dune::FieldMatrix<double, 4, 4> M) {
|
|
double diag = 0.0;
|
|
double offDiag = 0.0;
|
|
for (int i = 0; i < 4; ++i) {
|
|
for (int j = 0; j < 4; ++j) {
|
|
if (i == j)
|
|
diag += M[i][j];
|
|
else
|
|
offDiag += M[i][j];
|
|
}
|
|
}
|
|
BOOST_CHECK_CLOSE(4, diag, 1e-14);
|
|
BOOST_CHECK_SMALL(offDiag, 1e-14);
|
|
}
|
|
|
|
BOOST_AUTO_TEST_CASE(Invert4x4)
|
|
{
|
|
typedef Dune::FieldMatrix<double, 4, 4> BaseType;
|
|
BaseType matrix;
|
|
BaseType eye;
|
|
BaseType inverse;
|
|
|
|
for (int i = 0; i < 4; ++i) {
|
|
for (int j = 0; j < 4; ++j) {
|
|
matrix[i][j] = i + 4*j + 1;
|
|
}
|
|
}
|
|
BaseType matrix_sing (matrix);
|
|
// make matrix non-singular
|
|
matrix[3][0] = 5;
|
|
matrix[0][3] = 14;
|
|
|
|
double det = Dune::FMatrixHelp::invertMatrix(matrix, inverse);
|
|
BOOST_CHECK_CLOSE(4, det, 1e-14);
|
|
|
|
// check matrix * inverse close to identiy
|
|
checkIdentity(matrix.rightmultiply(inverse));
|
|
|
|
// check return identity matrix if singular matrix
|
|
inverse = 0.0;
|
|
double det2 = Dune::FMatrixHelp::invertMatrix(matrix_sing, inverse);
|
|
BOOST_CHECK_CLOSE(1.0, det2, 1e-14);
|
|
checkIdentity(inverse);
|
|
}
|
|
|
|
|
|
|
|
|