code: public Collection<Line> getPoints()
      {
          final Collection<Line> list = new ArrayList<>(npoints);
          for (int i = 0; i < npoints / 2; i++)
          {
              list.add(new Line(xpoints[i], ypoints[i], xpoints[i + npoints / 2], ypoints[i + npoints / 2]));
          }
          return list;
      }
docs: Get the points.
  
  @return The points.