link_message or listen

Hello there,

There are nine objects all linked on ten spots.
If I touch the root prim, it requests nine children to report where they are.
And what I want to know is which spot there is no object on.

Can link_message event accomplish this? If it can, how are nine messages dealed with?
Or should I use multi channels on listen event?

Thanks.

If they are linked, you could return the key as the last argument...
...and use the others to specify the "space number" or llGetPos() or both.

llMessageLinked(myControlLinknum, space_number, (string)llGetPos(), llGetKey());

Never use listeners for short range communications if you can link the objects and use link messages instead. Listeners are very laggy - they constantly poll the sim for chat messages.
The messages, you need to create them yourself. Pass the position vector as a string or something - llMessageLinked lets you send an integer, a key and a string.

and there is greater security in linked messages.

Thank you, everybody!

But what I wanted to know is that the root prim would receive messages all at once from nine children and how it should decide what messages were whose ones.

The first child saysThe second child syasThe third child syas.
.
.
The ninth child syasAnd the root prim receives

 link_message(integer sender_num, integer num, string str, key id)

Can the root prim memorize all children's messages in the "str" variable? If so, how is it recalled?

Is this available?

if(sender_num == 2)
{
    llOwnerSay("The first child says " + str);
}
if(sender_num ==3)
{
    llOwnerSay("The second child says " + str);
}
.
.
.

And can I get nine all messages?

Ah ok, well it will probably help if you appreciate that in your "root prim", the link_message() event will be called nine times. i.e. Separate invocations for each message sent by the "child prims".

/esc

Thank you.
I'll try to use llMessageLinked.