Lines between contours

how could I make to appear some lines that unite two or more points, seen by a block contour?
to create an effect similar to this:

I have realized this but it creates only confusion.

p.s. thanks to all for the help, I am learning me a lot of things on this splendid program.

linee tra punti.v4p (39.7 kB)

If you download the only 2 modules I have posted, connect your values to the LinearInterpolationSpread to the SpreadToRope and than a rope and finaly a renderer… (shure you can do it easier, but this pops to mind).

Get my modules here: West Modules

two useful patches, Thanks thousand.