Code:
new total_dist, origin[3], p_origin[3];
get_user_origin(id, p_origin);
// edit these to the specific origin you want
origin[0] = x;
origin[1] = y;
origin[2] = z;
total_dist = get_distance(origin, p_origin);
// edit 500 to whatever
if(total_dist > 500) {
// too far!
// remove_task( ... );
}
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