void AddFieldInstance(FieldInstance instance)
{
instance.SetField(this);
if (fieldList.First == null || instance.Position < fieldList.First.Value.Position)
{
fieldList.AddFirst(instance);
}
else if (fieldList.Last.Value.Position <= instance.Position)
{
fieldList.AddLast(instance);
}
else
{
foreach (var entity in fieldList)
{
LinkedListNode<FieldInstance> current = fieldList.Find(entity);
if (current.Value.Position <= instance.Position && instance.Position < current.Next.Value.Position)
{
fieldList.AddAfter(current, instance);
break;
}
}
}
}