Function vec2::inv

pub fn inv<'out, T>(out: &'out mut [T; 2], b: &[T; 2]) -> &'out mut [T; 2] where
    T: One + Neg<Output = T>,
    &'a T: Mul<&'b T, Output = T>, 

Example

let mut v = vec2::new_zero();
vec2::inv(&mut v, &[1; 2]);
assert_eq!(v, [-1; 2]);