an event at midnight

I am writing a script and i want something to happen at midnight every day


So how do i make an event happen at 12 am SL time every day?

Through cunning use of

http://wiki.secondlife.com/wiki/LlGetWallclock

is my guess.

You may also want to look at http://wiki.secondlife.com/wiki/LlSetTimerEvent or http://wiki.secondlife.com/wiki/LlSleep

dont forget your math

if i were to do it ...

when the script came online check the time, and get the difference tween then and midnight

set a sleep, or a timer (timer if you want the script to do things while its waiting) for the difference tween the time and the next whole hour (ie you start it up at 11:30 am set a 30 min event)

after that check every hour and ajust for differences untill you hit midnight

Why check every hour?
Surely one line should do it:

llSleep(86400 - llGetWallclock());

llGetWallclock returns the seconds since midnight. 24 hours is 86400 seconds, so the above makes it sleep for the number of seconds till the next midnight.
To make it repeat each day, simply put that line in a function that calls itself.

I wonder how much time drift there would be over a 24 hour period if any.

becuase in a day the timer event drifts
becuase of script lag
becuase of downtimes and updates

it wont strike midnight if the server has been down slow ect

as far as the actuall drift, its hard to nail down .. on my home sim it can get upto 10 min in a day, out by my shop its within seconds

couse get a botched update or a grey goo attack it could be hours ...

Is that specific to the timer event or does it also effect the sleep?
I haven't tested for drift, so I don't know. Might be interesting to find out what happens to sleeping scripts on a sim reset as well.

Why not just verify that llGetWallClock= somewhere between 0 and 30 (in seconds) and then do the event?

Means it'll do the event every time at midnight SLT.

far as i can tell (which i havent spent my life on this or anything) timer and sleep use the same thing for the countdown

0 seconds will shut the timer off
and checking it every 30 seconds means it would check 2880 times a day

every hour or 2 and doing some basic math would give pretty pinpoint results

That's not what he means at all. He means:

if(llGetWallClock > 0 || llGetWallClock < 30) {
     //do stuff
}

Or you can just get the sun direction, with a little fudging on the <0, 0, -1> giving yourself a little buffer so you aren't firing the timer event and checking every second, and here is the link to the function at one of the wikis.


http://www.lslwiki.net/lslwiki/wakka.php?wakka=llgetsundirection