Gathers the non-periodic x line into a periodic one so that a plain FFT can stand in for the cosine transform. Unlike the y version below this handles an odd nx, which the 100 case requires.
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| class(omp_poisson_fft_t) | :: | self | ||||
| class(field_t), | intent(inout) | :: | f_out | |||
| class(field_t), | intent(in) | :: | f_in |