docs: public void update(double x, double y)
      {
          boolean changed = false;
          if (x < xMin || Double.isNaN(xMin))
          {
              xMin = x;
              changed = true;
          }
          if (x > xMax || Double.isNaN(xMax))
          {
              xMax = x;
              changed = true;
          }
          if (y < yMin || Double.isNaN(yMin))
          {
              yMin = y;
              changed = true;
          }
          if (y > yMax || Double.isNaN(yMax))
          {
              yMax = y;
              changed = true;
          }
      }