integer llSameGroup(key id)

Return whether the given object or avatar has the same active group as the current prim.

The key of an avatar or a prim in the same region.

Returns TRUE if the user defined by id has the same group active that the prim with this script is assigned to, or deeded to, or if the object of key id is assigned to the same group. Returns FALSE if the user or object is not currently in the same region, or if the assigned group differs.

• This function will also return TRUE if the user/object of key id has no active group, and the prim containing the script is not assigned to any group.
• TRUE is also returned if this object is not assigned to any group, and the function is called with NULL_KEY.
• An object MAY be constructed from several prims each assigned to a different group. However, if the built object is then assigned to a new group, each component prim will be reassigned.

integer Same = llSameGroup(llGetOwner()); // Same will be TRUE if the object owner's currently active group is the same as that which the touched prim is assigned to, and the owner is currently in the region.

The following script will only allow people whose active group matches the object's group to sit on the prim. It will unsit them otherwise.

llSameGroup-example.lsl

default
{
    state_entry()
    {
        llSitTarget(<0, 0, 1>, ZERO_ROTATION);
    }

    changed(integer change)
    {
        if (change & CHANGED_LINK)
        {
            key id = llAvatarOnSitTarget();
            if (! llSameGroup(id))
            {
                llUnSit(id);
                llRegionSayTo(id, 0, "This seat can only be used with the correct group tag active.");
            }
        }
    }
}

• llDetectedGroup is a shortcut that can be used inside detection events.