Function glm::ext::angle [−] [src]

pub fn angle<F: BaseFloat + GenFloat<F>, T: GenFloatVec<F>>(x: T, y: T) -> F

Returns angle between vectors x and y.

The return value is in radian unit and in the interval [0, π].

Note

x and y need be normalized to get meaningful result.
If either x or y is zero, the angle is undefined, and 0 is returned.

Example

use glm::*;
use glm::ext::*;

let vx = vec2(1., 0.);
let vy = vec2(0., 1.);
assert!(is_approx_eq(&angle(vx, vy), &half_pi()));
assert!(is_approx_eq(&angle(vy, vx), &half_pi()));