Multiple seats on an object...

Hi, I have an object with 4 seats, all linked together... And I want to make one of 4 corresponding objects rez when I sit on one of the seats...(Sit on seat 1, object 1 rez'
es, get off seat 1 and it derez'es, sit on seat 2 obj 2 rez'es, ect...) However, using the standard, "check and see if CHANGED_LINK", and then "llAvatarOnSitTarget()" to get the key of an avatar gives me the result that when person A sits on seat A, person B's object says, "Oh, changed link, and there's someone sitting on me!" and person B is rez'ed a second copy of the object... And then when someone stands up, it's supposed to kill their corresponding object... which it does, but it hits the CHANGED_LINK call in each other object and if someone is sitting on other seats, rez'es another copy for them..

Ok, before I ramble out of control, to paraphrase, I guess what I'm asking is, is there any other commands I'm missing that might help me out here? Like a "LOCAL_CHANGED_LINK"... I get that when you sit on something, it calls CHANGED_LINK and when you stand up, it calls it again... because you're just linking and unlinking your AV to the seat... And since I need to keep the seats linked, I'm trying to weasel my way out of some complicated "administrative script" that says, "Ok, changed link, previously we had 3 people sitting, now we have 4, lemme check which one has changed, lemme only rez the object for the 4th person who just sat, now we have 3 people sitting again, re-check who was previously sitting to find who got up, just un-rez their object, blah, blah, blah..."

You need to add logic to your script so that it knows if someone is already sitting on the prim. I would suggest having two states... "empty", and "sitting".

In your sitting state, you won't give the object when llAvatarOnSitTarget() returns a key, because you'll know that its already been given.

Try something like this...

state default
{
    state_entry()
    {
        state empty;
    }
}

state empty
{
    changed( integer change )
    {
        if ( llAvatarOnSitTarget() != NULL_KEY )
        {
            //  code to give your object goes here
            state sitting;
        }
    }
}

state sitting
{
    changed( integer change )
    {
        if ( llAvatarOnSitTarget() == NULL_KEY )
        {
            state empty;
        }
    }
}

this is the code I typically use. I haven't expernced any trouble with it. But I won't claim it's perfect.

//global variables
key         userID      = NULL_KEY          ; 
//global settings
vector      sitVector   = <0.0,0.0,0.00001> ;
rotation    sitRotation = ZERO_ROTATION     ;
string      sitText     = "Relax"           ; 



// sit detection
setUp ( key sitID)
{
    userID = sitID;
    // on sit code here
    llSay( 0, "sit detected: " + (string)sitID );
}


shutDown ()
{
    // on stand code here
    llSay( 0, "stood detected: " + (string)sitID );
    userID = NULL_KEY;
}


sitDetect ( key newKey, key currenKey )
{
    if ( newKey != NULL_KEY && currenKey == NULL_KEY )
    {
        setUp ( newKey );
    }
    else if ( newKey == NULL_KEY && currenKey != NULL_KEY )
    {
        shutDown ();
    }
}


//States and triggers
default
{
    state_entry()
    {
        llSitTarget( sitVector, sitRotation );
        llSetSitText( sitText );
    }
    
    changed( integer change )
    {
        if ( change == CHANGED_LINK )
        {
            sitDetect( llAvatarOnSitTarget(), userID );
        }
    }
}

Thank you both! Like most other things in my life, I posted this question and then promptly got sidetracked for about a month, came back and solved it. Much appreciated!