/// <summary>
/// Registers object to be to be updated each frame.
/// </summary>
public void RegisterUpdateable(IUpdateable updateable)
{
int key = updateable.GetHashCode();
if (!_toBeUpdatedKeys.Contains(key))
{
_toBeUpdated.Add(new KeyValuePair <int, WeakReference <IUpdateable> >(key, new WeakReference <IUpdateable>(updateable)));
_toBeUpdatedKeys.Add(key);
}
}
