pub fn twiddle_factor(k: u32, n: u32, inverse: bool) -> (f32, f32)Expand description
Compute the twiddle factor for position k of an n-point transform.
Returns (cos(angle), sin(angle)) where:
- forward (
inverse = false):angle = -2π·k/n - inverse (
inverse = true) :angle = +2π·k/n