Fast fourier transform derived from the Numerical Recipes in C routine. More...
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enum | transformDirection { FORWARD_TRANSFORM = 1, REVERSE_TRANSFORM = -1 } |
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static void | transform (complexField &field, const labelList &nn, transformDirection fftDirection) |
static tmp< complexField > | forwardTransform (const tmp< complexField > &field, const labelList &nn) |
static tmp< complexField > | reverseTransform (const tmp< complexField > &field, const labelList &nn) |
static tmp< complexVectorField > | forwardTransform (const tmp< complexVectorField > &field, const labelList &nn) |
static tmp< complexVectorField > | reverseTransform (const tmp< complexVectorField > &field, const labelList &nn) |
Fast fourier transform derived from the Numerical Recipes in C routine.
The complex transform field is returned in the field supplied. The direction of transform is supplied as an argument (1 = forward, -1 = reverse). The dimensionality and organisation of the array of values in space is supplied in the nn indexing array.
enum transformDirection |
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Definition at line 42 of file fft.C.
References Foam::abort(), UList< T >::begin(), Foam::endl(), Foam::FatalError, FatalErrorInFunction, Foam::fftRenumber(), forAll, fft::forwardTransform(), n, Foam::sin(), List< T >::size(), Foam::sqrt(), SWAP, and TWOPI.
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Definition at line 187 of file fft.C.
References tmp< T >::clear(), tmp< T >::ref(), fft::reverseTransform(), and Foam::transform().
Referenced by Foam::calcEk(), fft::reverseTransform(), and fft::transform().
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Definition at line 203 of file fft.C.
References tmp< T >::clear(), fft::forwardTransform(), tmp< T >::ref(), and Foam::transform().
Referenced by fft::forwardTransform(), noiseFFT::Pf(), and turbGen::U().
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Definition at line 219 of file fft.C.
References tmp< T >::clear(), Foam::component(), VectorSpace< Vector< scalar >, scalar, 3 >::nComponents, tmp< T >::ref(), Field< Type >::replace(), and fft::reverseTransform().
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Definition at line 248 of file fft.C.
References tmp< T >::clear(), Foam::component(), VectorSpace< Vector< scalar >, scalar, 3 >::nComponents, tmp< T >::ref(), and Field< Type >::replace().