void Awake()
{
//hide message text
gameOverText.gameObject.SetActive(false);
isGameOver = false;
//get manager
mItemManager = GetComponent<ItemManager>();
mMonsterManager = GetComponent<MonsterManager>();
mMapManager = GetComponent<MapManager>();
//get character setting
mSetUp = (SetUpManager)FindObjectOfType<SetUpManager> ();
mPlayerData = new List<CharacterSetupManager>(mSetUp.transform.GetComponentsInChildren<CharacterSetupManager>());
PlayerCount = mPlayerData.Count;
PlayerLeft = PlayerCount;
Debug.Log ("playerCount: " + PlayerCount);
//get map setting
mMapManager.setMapList (mSetUp.mapList);
//build player list
mPlayerList = new List<Damagable> ();
mPlayerPositionIndex = new List<int>();
//build item list
mItemOnMapList = new List<Item>();
mItemOnMapPositionIndex = new List<int>();
mItemSpawnCounters = new List<float>();
//build monster list
//....
mGameStage = GameStage.Init;
}