Why does it compute FFT_REVERSE?

[Naahuel]

I'm trying to adapt this project to my needs and I would like to know to which frequency each magnitude belongs to and I came across this:

powermeter/src/measure.cpp

Lines 481 to 482 in 9de2581

	FFT.Windowing( FFT_WIN_TYP_HAMMING, FFT_REVERSE);
	FFT.Compute( FFT_REVERSE );

Are we not converting from time domain to frequency domain? why FFT_REVERSE?

Thank you!