Unity3d 鼠标拾取

 
function Update ()     {        if (Input.GetMouseButton (0))         {            var ray = Camera.main.ScreenPointToRay (Input.mousePosition);            var hit : RaycastHit;            if (Physics.Raycast (ray, hit))             {                Debug.DrawLine (ray.origin, hit.point);                print(hit.collider.gameObject.name);            }        }    }