/**
* Checks to see if the rectangle fully contains another rectangle.
*
* @param Rectangle $other
* @return bool
*/
public function contains(Rectangle $other)
{
$normThis = $this->normalized();
$normOther = $other->normalized();
return $normThis->x1 <= $normOther->x1 && $normThis->x2 >= $normOther->x2 && $normThis->y1 <= $normOther->y1 && $normThis->y2 >= $normOther->y2;
}
