With regard to some past experiments:
How difficult would it be to implement a fast Fourier transform as an internal
POV-Ray / UberPOV / MegaPov function?
I'm assuming not doing this in SDL would be a whole lot faster.
It looks like everything's all set up to 'just' plug it in - the code is
available and free:
"Starting with version 1.3, FFTW is Free Software in the technical sense defined
by the Free Software Foundation (see Categories of Free and Non-Free Software),
and is distributed under the terms of the GNU General Public License."
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