[PD] fft beginner question

Mathieu Bouchard matju at artengine.ca
Wed Nov 21 17:49:16 CET 2007

On Tue, 20 Nov 2007, Frank Barknecht wrote:

>> I still don't exactly understand why one couldn't just use (x, y)
>> vectors;
> You *are* just using (x,y) rsp. (angle, radius) vectors. You can
> completely ignore the meaning of i as sqrt(-1) and just view "i" as
> the funny name of the second axis in a 2d-coordinate system.

You can see "i" as a 90-degree rotation, that turns x-axis values into 
y-axis values, and y-axis values into negated x-axis values, and so on.

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| Mathieu Bouchard - tél:+1.514.383.3801, Montréal QC Canada

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