Function vec2::cross

pub fn cross<T>(a: &[T; 2], b: &[T; 2]) -> T where
    T: Sub<T, Output = T>,
    &'a T: Mul<&'b T, Output = T>, 

Example

let mut v = [1_f32, 0_f32];
assert_eq!(vec2::cross(&mut v, &[0_f32, 1_f32]), 1_f32);