Ray ray = Camera.main.ScreenPointToRay(new Vector3(Screen.width/2,Screen.height/2,0));//射线Ray ray = Camera.main.ScreenPointToRay(new Vect
Ray ray = Camera.main.ScreenPointToRay(new Vector3(Screen.width/2,Screen.height/2,0));//射线Ray ray = Camera.main.ScreenPointToRay(new Vect