it looks simple question but it is very strange

hi freinds

may be some one think this is very simple question but please check

if i creat polyline using this lisp shifting ucs to 3point and sequence of points of ucs is clockwise the polyline generated can't be joined to any other

but if select the 3 point anticlockwise the polyline generated can be joined to other

(defun c:pc(/)
 (setq st1(getpoint"\n p0"))
 (setq pc(getpoint"\n p(x-direction)"))
 (setq ps(getpoint"\n py(y-direction)"))
 (setq ptlst'((0 0)(4 3)( 20 5)(33.2 10)(40.33 17)))
 (command "ucs" "New" "3p" st1 pc ps )
 (setvar"osmode"0)
(command "__.pline")
(setvar"osmode"0)
 (mapcar 'command ptlst)
 (command)
 (command "ucs" "world" )
)

although if we draw polyline manualy selecting new ucs-3points we will get same results according to direction of selecting 3points of ucs

wish any one has information about this problem to help

Is this a continuation of your thread from yesterday?

Since the polyline was drawn into a custom UCS, then you are restricted to join to it only polylines drew into the same coordinates system. You may check the DXF code 210 (extrusion vector) of those entities.

One comment, your routine is resetting the OSMODE system variable - a good programming practice is to restore user's environment if you modify it.

it is a part of routine to show only problem

but you see MSasu if you pick points counterclockwise the polyline can be joined even it is drawn in a different coordinte system that mean it is not restricted