Detect if an avatar has already touched an object?

[i3ulma]

I've searched quite a bit for an answer on this already, but hopefully I can get someone's help on here.  Is there a way to detect if an avatar has already touched an object before?  I was hoping I could store the detected keys into a notecard and read each line to see if it matched the detected key, but it looks like writing to notecards can't be done through a script.  So, is there any alternative ways to accomplish this?

Thanks.

[Rolig Loon]

You can't write to a notecard, but that would be a clumsy method anyway.  All you have to do is store the av's UUID or a tokenized version of it in your script's memory.  See http://wiki.secondlife.com/wiki/User:Rolig_Loon/High-Capacity_Greeter-Counter , for example.  The part of that script that you're looking for is in the while loop in the timer event, where it uses llGetAgentInfo to collect the UUIDs of all avatars on the sim at the time.  You could just as easily use that same block of code in a touch_start event to grab the llDetectedKey(0) of an avatar who touches your object.  If you don't anticipate storing a huge amount of information, you could simplify it by just saving llDetectedKey(0) itself instead of compressing it.  

[i3ulma]

Thank you for the help.  Worked like a charm!