docs: private static ArrayList<double[]> getVisibleEdges(Projection2D proj, double[] s_min, double[] s_max) {
      final int dim = s_min.length;
      double[] s_deltas = VMath.minus(s_max, s_min);
      ArrayList<double[]> r_edges = new ArrayList<>(dim);
      for(int i = 0; i < dim; i++) {
        double[] delta = new double[dim];
        delta[i] = s_deltas[i];
        double[] deltas = proj.fastProjectRelativeDataToRenderSpace(delta);
        if(deltas[0] != 0 || deltas[1] != 0) {
          r_edges.add(deltas);
        }
      }
      return r_edges;
    }