public bool IsTwoSidePortal(RoomSector s2)
{
var s1 = CheckPortalPointer();
s2 = s2.CheckPortalPointer();
if (OwnerRoom == s2.OwnerRoom) return false;
var s1p = s2.OwnerRoom.GetSectorRaw(Position);
var s2p = s1.OwnerRoom.GetSectorRaw(s2.Position);
if (s1p.PortalToRoom < 0)
{
s1p = s1p.CheckAlternateRoom();
if (s1p.PortalToRoom < 0) return false;
}
if (s2p.PortalToRoom < 0)
{
s2p = s2p.CheckAlternateRoom();
if (s2p.PortalToRoom < 0) return false;
}
return s1p.CheckPortalPointer() == s1.CheckBaseRoom() &&
s2p.CheckPortalPointer() == s2.CheckBaseRoom()
||
s1p.CheckPortalPointer() == s1.CheckAlternateRoom() &&
s2p.CheckPortalPointer() == s2.CheckAlternateRoom();
}
