on sit events...

so I need a script to do different things when sat on, then gotten off of. I thought to set an integer that changes when sat on, then changes back to the default when gotten off of... but that didn't work.

what now?

key avatar;
integer n;
default 
{
	 state_entry() 
		{
			n = 0;
		 llSitTarget(<0.0,0.0,0.250>,ZERO_ROTATION);
		}
		changed (integer change)
		{
			if (change == CHANGED_LINK)
			{
				avatar = llAvatarOnSitTarget();
				if(n == 0)
				{
					n = 1;
					llOwnerSay(llKey2Name(llAvatarOnSitTarget()));
					llRequestPermissions(avatar, PERMISSION_TAKE_CONTROLS);  
				}
			}
				if (n == 1)
				{
					if (llGetPermissionsKey() != NULL_KEY) {
						n = 0;
					llOwnerSay(llKey2Name(avatar)+" has gotten up. Releasing controls.");
		}
	}
}
	run_time_permissions(integer perm)
		{
		if (perm & PERMISSION_TAKE_CONTROLS) 
			{
			llTakeControls(CONTROL_FWD | CONTROL_BACK | CONTROL_ROT_RIGHT| CONTROL_ROT_LEFT, TRUE, FALSE);
		}
	}
	
   control(key id, integer held, integer change) {
		integer pressed = held & change;
		integer down = held & ~change;
		integer released = ~held & change;
		integer inactive = ~held & ~change;

		if (pressed & CONTROL_FWD) {
			llOwnerSay("up");
		}
		else if(pressed & CONTROL_BACK) {
			llOwnerSay("back");
		}
		else if (pressed & CONTROL_ROT_RIGHT) {
			llOwnerSay("right");
		}
		else if (pressed & CONTROL_ROT_LEFT) {
			llOwnerSay("left");
		}
	}
}

The changed event occurs when a change is made... hence...

default
{
state_entry()
{
llSitTarget(<0, 0, 0.1>, ZERO_ROTATION); // needed for llAvatarOnSitTarget to work
}

changed(integer change)
{ // something changed
if (change & CHANGED_LINK)
{
// and it was a link change
key av = llAvatarOnSitTarget();
if (av)
{ // somebody is sitting on me
// seated code goes here...
}
else
{
// unseated code here
}
}
}
}

i was working on it alittle, and it worked fine just it didnt know when the avatar got off right away, basicly just had to switch the top script around, the first part of the script should the

{
changed stuff*
{
// avatar gets off what dose script do / releasecontrols()
}
else
{
//what script should do when avatar gets on / permision requests
}
//perm stuff
}
controls
{
//ect ect

You have to use the if - else structure, if you use two "if" the script will enter in both because in the first one you wrote "n = 1", this is what you wrote:

// This is bad

state_entry()
{
n = 0;
}

if (change & CHANGED_LINK)
{
if (n == 0) // yes it is
{
n = 1; // now n equals 1
//do something
}

if (n = 1) // yes it is
{

n = 0; // now n equals 0
//do someting
}
}


This is Ok:

state_entry()
{
n = FALSE;
}

on_rez()
{

n = FALSE;

}

if (change & CHANGED_LINK)
{
if (!n) // is (n == FALSE)
{

//do something

}

else // n == TRUE;
{

//do someting
}

n = !n ///////// if (n == FALSE) n == TRUE; else n == FALSE;
}

-------------------------------------------------------------------------------------------

And one more thing: state_entry() is triggered when you save/reset script and when you enter to a state. So if you rezz an object sate_entry is not triggered, therefore you should use on_rez event.

Never assume an avatar sat on your object when a link change event occurs.

Always cross-check llAvatarOnSitTarget() with NULL_KEY.

If its NULL_KEY the avatar stood up or the linkset changed.
If its NOT NULL_KEY then someone acutally sat down on your object.


But what if somebody sits on your object and you get a link change event?
In such a case, someone else obviously sat down on the object too.
Though that persons UUID will not show up through llAvatarOnSitTarget().
There are other ways to determine it though.