Consequently, I remember reading something that tried to explain the fourier transform using the same geometric interpretation of a rotating vector with its com

Consequently, I remember reading something that tried to explain the fourier transform using the same geometric interpretation of a rotating vector with its complex numbers. I think waves can be thought of as rotations as any point on the wave is going through a cycle, and the FT can "pick out" different frequencies by looking at where the vector lands. I should go back and look at it. To this day, I never really fully comprehended that and the butterflies in FFTs.