Function quat::len_values

pub fn len_values<T>(x: &T, y: &T, z: &T, w: &T) -> T where
    T: Real,
    &'a T: Mul<&'b T>,
    <&'a T as Mul<&'b T>>::Output == T, 

Example

assert_eq!(vec4::len_values(&1_f32, &1_f32, &1_f32, &1_f32), 4_f32.sqrt());