User:Toady Nakamura/Owner Only

If you want your object to only react to the owner, you need to get and use the owner's UUID key.

Filter the key of the toucher against the owner's key by using the conditional format (if *what I got* == *the limiting factor*).

Example 1 - Congratulate owner

The following example responds to owner's touch but does nothing at all if anyone else touches. if toucher key exactly equals owner's key - congratulate owner!

default
{    
    touch_start(integer num_detected)
    {
        if(llDetectedKey(0) == llGetOwner())
        {
           llRegionSayTo(owner, 0, "You alone can touch me!");
        }
       // the else nothing happens doesn't need to be defined
        }
    }
}

Example 2 - If owner / else not owner

This example shows how to define the owner's key, and provides an if/else conditional structure:

• if toucher is owner, make box green, else make box red!

key owner;

default
{
    state_entry()
    {
        owner = llGetOwner();
    }
    
    touch_start(integer num_detected)
    {
        if(llDetectedKey(0) == owner)
        {
           llSetColor(<0,1,0>, ALL_SIDES); // green
        }
        else
        { 
           llSetColor(<1,0,0>, ALL_SIDES); // red
        }
    }

    changed(integer change)
    {    
        if (change & CHANGED_OWNER)
        {
            llResetScript();
        }
    }
}

Example 3 - If owner or friend/ else if other friend/ else none of the above

This example shows one way to code different behaviors for different keys.

key owner;
key friend_key = "000000000000000000000"; // use a real key here!!
key friend2_key ="9999999999999999999999";// use a real key here!!

default
{
    state_entry()
    {
        owner = llGetOwner();
    }
    
    touch_start(integer num_detected)
    {
	key toucher = llDetectedKey(0);

        if(toucher == owner || toucher == friend_key) // either you or first friend
        {
           llSetColor(<0,1,0>, ALL_SIDES); // green
        }

	else if(toucher == friend2_key); // if second friend
	{
	    llSetColor(<1,1,0>, ALL_SIDES); // yellow
	}
        else // anybody else
        {
           llSetColor(<1,0,0>, ALL_SIDES); // red
        }
    }

    changed(integer change)
    {    
        if (change & CHANGED_OWNER)
        {
            llResetScript();
        }
    }
}

* Why two == or two || ?

Because the if/else comparison is only TRUE/FALSE, the LSL_Operators Math Operators (symbols) are Boolean. Boolean Logic works on three Boolean Operators: “Or,” “And,” and “Not”. Using those three, all results of Boolean Logic resolve as either TRUE (1) or FALSE (0). You can compare positively as we do here, or compare to a negative by using if (toucher_key != owner) format.

* Why do two examples have the changed event?

Example 1 does not have changed event because script checks for owner after every touch. Which works but is not ideal.

Examples 2 & 3 do have changed events because script checks once in state_entry and stores the answer. If the item changes to new owner, it resets and gets the new owner's UUIDkey.

There are other "for owner only" tricks! See the simple listener example!

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Visit my LSL wiki page for my library of simple scripts ! Toady Nakamura