Select vertices of a polyline

By Augusto Goncalves

The vertices of the AcDbPolyline are not separate entities, that is why acedNentSelP() no longer works. The vertex information is now stored directly in the polyline entity. The AcDbPolyline supports GS Markers (Graphic System Markers), which means you can find out which vertex the user selected by a combination of ssget and ssnamex:

(setq s (ssget))
(setq marker (caddr (car (setq e (ssnamex s 0)))))
(setq e (entget (cadr (car e))))
(setq l 0)
(foreach i e
   (if (= 10 (car i))
      (progn
         (if (= l marker)
            (progn
               (princ (cdr i))
               (terpri)
            )
         )
         (setq l (1+ l))
      )
   )
)