pline, length of vertex distance from ends?

is there an easy way to tell how much is given vertex/node away from 'edge' of pline?

(distance between first/last vertex and that one)

autocad only displays distance to next/previous vertex, and its tedious to break pline in two..

thanks.

Look into the vlax-curve-* functions in the developer documentation.

'cal dpl(p,p1,p2) page 116 release 12 extras manual

need though (setq p (getpoint)) (setq p1 (getpoint)) (setq p2 (getpoint)) p is point p1& p2 pline points, bit simpler than having to work out maths etc or pull the pline apart or vlax-curve