public static double getDist(Atom a, Atom b) {
    double xDist = a.getPoint().x - b.getPoint().x;
    double yDist = a.getPoint().y - b.getPoint().y;

    double dist = Math.sqrt((xDist * xDist) + (yDist * yDist));
    return dist;
  }
  public static double getRoughDist(Atom a, Atom b) {
    double xDist = a.getPoint().x - b.getPoint().x;
    double yDist = a.getPoint().y - b.getPoint().y;

    return xDist + yDist;
  }