pub trait Matrix3Ext<T>where
T: Scalar,{
// Required methods
fn side(&self) -> Matrix<T, Const<3>, Const<1>, ArrayStorage<T, 3, 1>>;
fn up(&self) -> Matrix<T, Const<3>, Const<1>, ArrayStorage<T, 3, 1>>;
fn look(&self) -> Matrix<T, Const<3>, Const<1>, ArrayStorage<T, 3, 1>>;
}