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fft.H
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23 
24 Class
25  Foam::fft
26 
27 Description
28  Fast fourier transform derived from the Numerical
29  Recipes in C routine.
30 
31  The complex transform field is returned in the field supplied. The
32  direction of transform is supplied as an argument (1 = forward, -1 =
33  reverse). The dimensionality and organisation of the array of values
34  in space is supplied in the nn indexing array.
35 
36 SourceFiles
37  fft.C
38 
39 \*---------------------------------------------------------------------------*/
40 
41 #ifndef fft_H
42 #define fft_H
43 
44 #include "complexFields.H"
45 #include "labelList.H"
46 
47 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
48 
49 namespace Foam
50 {
51 
52 class fft
53 {
54 
55 public:
56 
58  {
61  };
62 
63 
64  static void transform
65  (
67  const labelList& nn,
68  transformDirection fftDirection
69  );
70 
71 
73  (
74  const tmp<complexField>& field,
75  const labelList& nn
76  );
77 
78 
80  (
81  const tmp<complexField>& field,
82  const labelList& nn
83  );
84 
85 
87  (
89  const labelList& nn
90  );
91 
92 
94  (
96  const labelList& nn
97  );
98 };
99 
100 
101 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
102 
103 } // End namespace Foam
104 
105 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
106 
107 #endif
108 
109 // ************************************************************************* //
Fast fourier transform derived from the Numerical Recipes in C routine.
Definition: fft.H:51
static tmp< complexField > reverseTransform(const tmp< complexField > &field, const labelList &nn)
Definition: fft.C:203
static tmp< complexField > forwardTransform(const tmp< complexField > &field, const labelList &nn)
Definition: fft.C:187
transformDirection
Definition: fft.H:56
Pre-declare SubField and related Field type.
Definition: Field.H:56
static void transform(complexField &field, const labelList &nn, transformDirection fftDirection)
Definition: fft.C:42
rDeltaTY field()
A class for managing temporary objects.
Definition: PtrList.H:53
Namespace for OpenFOAM.