Changed Link Question/Problem

Good Morning All.

I have been looking for some definitive info on the CHANGED_LINK issue I am having.

I want to continue using CHANGED_LINK as a way to test for the avatar sitting on the object as it's efficient, BUT If I de-link a prim from the device this is triggered (as it should be) BUT it will immediately execute the do_end_stuff() call. IF I de-link a prim or Add a prim to the device I don't want the do_end_stuff() call to be executed, I would prefer to have it test that this (was not an avatar link change) and therefore bypass do_end_stuff().

So I guess the quick question in a NutShell, is there a way to further "Filter" the CHANGED_LINK event for the various possible triggers ?

=code snippet =
changed(integer change)
{
if (change & CHANGED_LINK)
{
AviSitting = llAvatarOnSitTarget(); // Get AVI Key sitting on here
if (AviSitting == NULL_KEY)
{
// avi got off //
do_end_stuff();
}
else
{
// avi got on //
do_start_stuff();
}
// *** possible trigger filters ***
// if (prim_link_change) do_prims_changed();
// if (prim_shape_change) do_shape_changed();
// if (prim_type_change) do_type_changed();

}
}

Thanks in Advance

Do a number check on the links:

state_entry()
{
gNumberOfPrims = llGetNumberOfPrims();
}

changed(integer change)
{
if(change & CHANGED_LINK)
{
integer newNumberOfLinks = llGetNumberOfPrims();
key avatar = llAvatarOnSitTarget();
if(avatar == NULL_KEY && (gNumberOfPrims == newNumberOfLinks))
{
//Code for if someone hopped off the object
}
else if(avatar == NULL_KEY && gNumberOfPrims != newNumberOfLinks)
{
//something was added or deleted in the link set, technically you don't need
//the second conditional gNumberOfPrims != newNumberOfLinks
//code for when an object is added to the link set
}
else if(avatar != NULL_KEY)
{
//code for someone sitting on the object
}
}
}

Basically, you need to check the number of prims in your set, if it changes from your initial number, and there is no avatar on the object, you know you changed the link set via a prim.

You can also make the code work like this:

key last_avatar = NULL;

changed(integer c)
{
  if(c & CHANGED_LINK) 
  {
    key new_avatar = llAvatarOnSitTarget();
    if(new_avatar != last_avatar)
    {
      // someone got off or on
    }
    else
    {
      // something else
    }
    last_avatar = new_avatar;
  }
}

Thanks Lazink & Argent.

That helps a LOT. I was suffering form an LSL Laps there... LOL... I'll implement those suggestions and expand on them further.


Take Care !

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