fftRenumber.H

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Global
    fftRenumber
 
Description
    Multi-dimensional renumbering used in the Numerical Recipes
    fft routine.
 
SourceFiles
    fftRenumber.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef fftRenumber_H
#define fftRenumber_H
 
#include "complex.H"
#include "List.H"
#include "labelList.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
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
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //