llInstantMessage

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/LSL

InstantMessage

llInstantMessage

Summary

Function: llInstantMessage( key user, string message );

2.0	Forced Delay
10.0	Energy

Sends an Instant Message specified in the string message to the user specified by user.

• key	user	–	avatar UUID
• string	message	–	message to be transmitted

To send a message directly to an object, use llRegionSayTo.

Caveats

• This function causes the script to sleep for 2.0 seconds.
  • For applications where this is problematic, llRegionSayTo can message the targeted agent directly with no delay, provided they are in the same region as the scripted object. For cross-region applications, the call to llInstantMessage can be placed in a child script, with information passed to that script via llMessageLinked. Then the script instigating the communication suffers no delay, only the slave child script is subjected to the 2 second delay.
• All object IM's are throttled at >2500 per 30mins, per owner, per region in a rolling window. this includes IM's sent after the throttle is in place
  • Throttled IM's are dropped. for implementation see notes below
• message will be truncated if it exceeds 1199 bytes.
• message will appear in the chat window and will not logged by the InstantMessage logging facility. (If a the specified user is not signed it, the messages will be delivered to their email just like a regular instant message, if the user has enabled email for their account.)

Examples

Tell the owner somebody touched the object: <lsl> default {

   touch_start(integer total_num)
   {        
       llInstantMessage(llGetOwner(), (string)total_num + " Avatar(s) touched me simultaneously!");
   }

}</lsl> Send a confirmation to the Avatar that touches an object without spamming other Avatars: <lsl>default {

   touch_start(integer total_num)
   {        
       llInstantMessage(llDetectedKey(0), "You have been registered!");
   }

}</lsl>

Notes

• For many applications llRegionSayTo may be a better choice, as it has no built-in delay and can communicate directly with objects as well as avatars. The only notable limitation is that it requires the target to be in the same region as the scripted object.
• Instant Messaging has the benefit of allowing communication from an object to an avatar anywhere in the Grid. The downside is that an object cannot receive an Instant Message, therefore an avatar cannot send an Instant Message to an object. It's a one-way communication avenue. Also, the two-second script delay can be considered a downside in some applications.
• Throttling Implementation (Kelly Linden):
  • The throttle is on all IMs from the object owner. It does not disable all IMs in the region, but does disable all IMs from the owner of the object.
  • The throttle is not per object, but per owner. Splitting the spamming object into multiple objects will not help unless owned by different people. This also means that owning multiple almost too spammy objects will cause you to hit the limit.
  • 2500 IMs in 30 minutes will trigger the block.
  • IMs that are blocked continue to count against the throttle. The IM count must drop below 2500 before any IMs will be delivered.
  • The IM count of the previous window is used to approximate the rolling window. If it is 20% into the current window the IM count will be the current count + 80% of the previous count. This allows us to approximate a rolling average, however it has the behavior that a flood of IMs can have an effect on the throttle for double the window length. This is why in practice the throttle behaves more like 5k in 1hr than 2.5k in 30min.

See Also

Functions

•	llOwnerSay	–	Sends chat region wide to owner
•	llRegionSay	–	Sends chat region wide
•	llRegionSayTo	–	Sends chat region wide to a specific prim/avatar
•	llWhisper	–	Sends chat limited to 10 meters
•	llSay	–	Sends chat limited to 20 meters
•	llShout	–	Sends chat limited to 100 meters

Deep Notes

Signature
function void llInstantMessage( key user, string message );