public void Change(Entity e)
{
bool contains = (systemBit & e.GetSystemBits()) == systemBit;
bool interest = (typeFlags & e.GetTypeBits()) == typeFlags;
if (interest && !contains && typeFlags > 0)
{
actives.Add(e.GetId(), e);
e.AddSystemBit(systemBit);
Added(e);
}
else if (!interest && contains && typeFlags > 0)
{
Remove(e);
}
}
