unity3d 动态添加模型到场景中

GameObject obj = (GameObject)Instantiate (Resources.Load ("3ddayinji")); 
GameObject room = GameObject.Find ("RoomEquipment4"); 
x = room.transform.position.x + 1.8f;
y = room.transform.position.y + 6.0f;
z = room.transform.position.z;
obj.transform.position = new Vector3 (x, y, z);
obj.transform.parent = room.transform;