Function quat::nlerp

pub fn nlerp<'a, 'b, T, F>(
    out: &'a mut [T; 4], 
    a: &'b [T; 4], 
    b: &'b [T; 4], 
    t: F
) -> &'a mut [T; 4] where
    T: Copy + Signed + Cast<F> + Sqrt,
    F: Copy + Signed + Cast<T>,