I could possibly add something like that to the BLG (or someone else could, after the source release). The only issue is that the BLG is, at least at the moment, geared more toward generating a starting point for logics and not toward generating code after the logic has been created. If these rectangles will be known before the logic for the room is created, then there's no problem, but if they won't be, then the BLG wouldn't be very useful for that situation. I think Nick had a similar idea about ego positioning, though, so this is a possibility. Just tell me what you think.
On the other hand, if I understand blacki correctly, although the AGI assistant appears to be geared toward adding things after you've got your logic already started, the AGI assistant will be an HTML/JavaScript based generator, in which case it won't have the necessary capabilities to do something like that.