Function libm::atan2

source ยท
pub fn atan2(y: f64, x: f64) -> f64
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Arctangent of y/x (f64)

Computes the inverse tangent (arc tangent) of y/x. Produces the correct result even for angles near pi/2 or -pi/2 (that is, when x is near 0). Returns a value in radians, in the range of -pi to pi.