/*
 * void
 * points()
 *
 * displays points updates
 */

function points()
{
    // if not all passengers have been dropped off
    if (POINTS < POPULATION)
        document.getElementById("announcements").innherHTML =
            "Successful dropoff! You now have " + POINTS + " dropoff points!";
    // if all passengers have been dropped off, announce
    else
        document.getElementById("announcements").innerHTML =
            "Congratulations, you have dropped off all the passengers!";
}



/*
 * void
 * dropoff()
 *
 * Drops up passengers if their stop is nearby.
 */


function dropoff()
{
    // so far no one has gotten off
    var anyoneOff = false;

    // for every passenger on the shuttle
    for (var person in SEATING)
    {
        if (SEATING[person] != "empty")
        {
            // calculate the distance to passenger's house
            var distance = shuttle.distance(HOUSES[SEATING[person].house].lat,
             HOUSES[SEATING[person].house].lng);

            // if anyone's house is within 30.0m
            if (distance <= 30.0)
            {
                // someone is getting off
                anyoneOff = true;

                // clear that person's seat
                SEATING[person] = "empty";

                /* update the seating display
                  note: I chose not to re-order the seating list and to leave
                 'empty seats' interspersed to reflect real life seating */
                seatDisplayUpdate();

                // add points to the players' total
                POINTS++;

                // announces points update
                points();

                }

            }
        }
        if (anyoneOff == false)
            document.getElementById("announcements").innerHTML =
                "No one to drop off here...";
}