[Unity] 如何判斷滑鼠有在某個物體之上

Vector2 mousePos=Input.mousePosition ; RaycastHit hit;


  LayerMask mask = 1 << {Layer ID}
            Ray ray = Camera.main.ScreenPointToRay(mousePos);
            bool b=(Physics.Raycast(ray, out hit, Mathf.Infinity, mask));

// b =  true 就是有選到