disabling event functions

Gentlemen,
    I have run across another situation where it would have been helpful
to be able to disable an event function. Earlier I suggested that
setting the direction argument of the cross function to something other
than -1, 0, or +1 should disable it. This is important because events in
an analog simulator are expensive. I have now found that it would be
useful to be able to disable the timer function. And by extension, it
seems like a good idea to be able to disable the above function as well.

I would like to suggest that we add boolean argument to each of the 3
analog event functions (cross, above, & timer) that can be used to
disable them.

Comments?

-Ken

-- 
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.