+float Elevator::distance_from (Stop &s) const
+{
+ Direction d = s.getDirection();
+ Position p = s.getPosition ();
+
+ /* If direction doesn't matter, then only position does */
+ if (d == ALL || direction_ == IDLE)
+ return distance_from (p);
+
+ /* If we're not in the same direction, then we're "really far" away */
+ if (d != direction_)
+ return INT_MAX;
+
+ /* We must be in the correct direction, so pure distance is fine */
+ return distance_from (p);
+}
+