code: public static double Chebyshev(IntPoint p, IntPoint q) {
          return Chebyshev(p.x, p.y, q.x, q.y);
      }
docs: Gets the Chebyshev distance between two points.
  
  @param p IntPoint with X and Y axis coordinates.
  @param q IntPoint with X and Y axis coordinates.
  @return The Chebyshev distance between x and y.