| /*---------------------------------------------------------------------------*\ | |
| ========= | | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | |
| \\ / O peration | Website: https://openfoam.org | |
| \\ / A nd | Copyright (C) 2011-2024 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/>. | |
| Global | |
| fftRenumber | |
| Description | |
| Multi-dimensional renumbering used in the Numerical Recipes | |
| fft routine. | |
| SourceFiles | |
| fftRenumber.C | |
| \*---------------------------------------------------------------------------*/ | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| namespace Foam | |
| { | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| // Recursively evaluate the indexing necessary to do the folding of the fft | |
| // data. We recurse until we have the indexing necessary for the folding in all | |
| // directions. | |
| void fftRenumberRecurse | |
| ( | |
| List<complex>& data, | |
| List<complex>& renumData, | |
| const labelList& nn, | |
| label nnprod, | |
| label ii, | |
| label l1, | |
| label l2 | |
| ); | |
| // Fold the n-d data array to get the fft components in the right places. | |
| void fftRenumber | |
| ( | |
| List<complex>& data, | |
| const labelList& nn | |
| ); | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| } // End namespace Foam | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| // ************************************************************************* // | |