// osNpcSit(<npc-uuid>, <target-uuid>, OS_NPC_SIT_NOW)
//     e.g. osNpcSit(npc, llGetKey(), OS_NPC_SIT_NOW);
//     target object must have sit positon set explicitly
// osNpcStand(<npc-id>)

// touch to create npc in front of this emitter
// Npc will walk to the toucher, then will greet them.
// Touch again to remove the NPC

// http://opensimulator.org/wiki/OSSLNPC

// http://opensimulator.org/wiki/OsNpcCreate
// http://opensimulator.org/wiki/OsNpcRemove
// http://opensimulator.org/wiki/OsNpcMoveTo
// http://opensimulator.org/wiki/OsNpcSay

string npcNoteCard = "NPC Appearance";
 
key npc;
vector toucherPos;
 
default
{
    
    state_entry() {
        llSetText("NPC Sitdown (Owner Use Only)",<0.6,0.6,0.6>, 1.0);
    }
    touch_start(integer number)
    {
        vector npcPos = llGetPos() + <1,0,0>;
        
        llSay(0,(string)llDetectedKey(number));
        if (llDetectedKey(0) == llGetOwner()) {
            osAgentSaveAppearance(llDetectedKey(0), npcNoteCard);
            npc = osNpcCreate("Sitting", "Clone", npcPos, npcNoteCard);
            
            // below for specific logged in avatar cloning via UUID
            // npc = osNpcCreate("ImYour", "Clone", npcPos, "e24a9015-f5ca-452b-8c95-d32e34cb9d64");
            
            // below or temp copy of NPC without saving appearance
            // npc = osNpcCreate("ImYour", "Clone", npcPos, llGetOwnerKey(llGetKey()));
            
            toucherPos = llDetectedPos(0);
            state hasNPC;
        }
        else llSay(0,"Sorry, I only make NPCs for "+llKey2Name(llGetOwner())+"\n You are "+llKey2Name(llDetectedKey(number)));
    }
}
 
state hasNPC
{
    state_entry()
    {
        osNpcSit(npc, llGetKey(), OS_NPC_SIT_NOW);
        // osNpcMoveTo(npc, toucherPos + <3,0,-5>); // -5 to make sure it lands - if avatar is on land
        
        osNpcSay(npc, "Hi there! My name is " + llKey2Name(npc)+" and I am sitting down.");
    }
 
    touch_start(integer number)
    {
        osNpcStand(npc);
        osNpcMoveTo(npc, toucherPos + <3,0,-5>); // -5 to make sure it is on land
        osNpcSay(npc, "Good bye!");
        osNpcRemove(npc);
        npc = NULL_KEY;
        state default;
    }
}