/**
  * Get the range, in pixel coordinates, taken for the point.
  *
  * @return Zone
  */
 public Zone getZone(Area p_map) {
   if (zone == null) {
     Point p1 = new Point(px, py);
     Point p2 = new Point(2, 1);
     if (isBorder()) {
       if (p1.x == 0 || p1.x == p_map.getDim_x() - 1) {
         p1.y = 0;
         p2.y = p_map.getDim_y();
         p2.x = 1;
       } else {
         p1.x = 0;
         p2.x = p_map.getDim_x();
       }
     } else if (isVertical()) {
       p2.x = 1;
       p2.y = 2;
     } else if (isSingle()) {
       p2.x = 1;
       p2.y = 1;
     }
     zone = new Zone(16 * p1.x, 16 * p1.y, 16 * p2.x, 16 * p2.y);
   }
   return zone;
 }