And i need to join all to obtain one (or more if not possible) polyline continuos. There are not order in segment point (first, i think order by x and if equal x order by y)
to obtain (in sample 2 list of points continuos)
(list (list 0 1) (list 1 0)) -..- (list (list 0 1) (list -1 0)) -..- (list (list -1 0) (list -3 3)) -..- (list (list 4 4) (list 4 6)) |_______________________| |_______________| common point common point