# outer loop goes through all points
for my $i ( 0 .. $#{$points}) {

    # inner loop only through those not visited yet
    for my $j ( ( $i + 1 ) .. $#{$points}) {

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

        # Push the whole thing on a stack
        push (@edges, [
            $edge,
            $points->[$i][0],
            $points->[$i][1],
            $points->[$j][0],
            $points->[$j][1]
            ]
        );            
    }
  }
}