void Start()
{
itemLibrary = GetComponent <ItemLibrary>();
itemLibrary.Initialize();
itemManager = new ItemManager(this, dropItemPool, dropItemPoolSize);
worldObjectManager = new WorldObjectManager(this, worldObjectTemplateList, worldObjectPool, worldObjectPoolSize);
characterObjectManager = new CharacterObjectManager(this, characterObjectTemplateList, characterObjectPool, characterObjectPoolSize);
uiManager = new UIManager(this);
}