Movement trigger

Ok im making this script to make a particle effect to come on whenever this prim moves all I do is replace the llSay part with the particle but it the trigger dosent seem to be working it just continually says moved.

default
{
    state_entry()
    {
        llSetTimerEvent(1);
    }
    timer()
    {
        vector last_pos;
    {
        if(last_pos != llGetPos())
        {
            llSay(0, "Moved");
        }
        else
        {
        }
    }
        last_pos = llGetPos();
    }
}

The problem is that last_pos is a local variable to the timer event. It should be global. Also, you may want to change the comparison to use llVecDist since it's bad practice to compare floats:

vector last_pos;
 
default
{
    state_entry()
    {
        llSetTimerEvent(1);
    }

    timer()
    {
        if(llVecDist(last_pos, llGetPos()) > 0.00001)
        {
            llSay(0, "Moved");
        }
        else
        {
        }
        last_pos = llGetPos();
    }
}

You could use llGetVel() function in your timer event.

http://secondlife.com/badgeo/wakka.php?wakka=llGetVel


Depending on your application you may be able to get rid of the timer event completely and use the moving_start event

http://secondlife.com/badgeo/wakka.php?wakka=moving_start

While I would normally agree, Hugsy, in this case I would stick to the comparison. If an object doesn't move, multiple calls to llGetPos will all return exactly the same values. They all contain the same "rounding errors" if you will.

Keno, consider Tip's moving_start suggestion - but if you do continue using a regular timer event note that llVecDist requires 3 float multiplies and a square root to calculate. Use comparison wherever you can - it's much faster.