hints

• If your points are disaggregated (e.g. all the xs in vecofxs, all the ys in vecofys)

  • aggregate them this way points = collect(zip(xs, ys, zs))

• Often, the xs respect x[i-1] < x[i] < x[i+1] or x[i-1] > x[i] > x[i+1]

  • when the path is a closed curve, one triplet may follow
  • x[i-1] < x[i] > x[i+1] or x[i-1] > x[i] < x[i+1]