# p1 is starting or anchor point of the line segment
  foreach my $p1 (@{$points}) {

    # p2 is end point of the line segment
    foreach my $p2 (@{$points}) {

      # We don't need to caculate if anchor and end are the same
      # or we have already seen these two pairs [reversed] before    
      unless ( ($p1 == $p2) || $found->{$p2}->{$p1} ) {

        # Compute the edge
        my $edge = sqrt(
          ($p1->[0] - $p2->[0])**2 +
          ($p1->[1] - $p2->[1])**2
        );

        # Push the whole thing on a stack
        push (@edges, [ $edge, $p1->[0], $p1->[1], $p2->[0], $p2->[1] 
+]);

        # Keep track of the edges we've already computed (no need to d
+o so twice)
        $found->{$p2}->{$p1} = 1;

      }
    }
  }