AutoCAD LISP automatizing polyline drawings - lisp

Question

I would like to ask a question about automatizing polyline drawing. Here I have a FUNC and I want to add more specific commands. What I mean: I want the polyline to be assigned to a chosen layer automatically and i also want to set the line type to my custom line type. Thanks for the answers.
Here is my code:

Answer 1

You can get the newly created polyline with the entlast function and change its properties with _chprop command.
(defun c:nyomvodal (/ pt lst)
;; create a new layer
(command "_layer" "_new" "nyomvodal" "_color" 3 "nyomvodal" "")
;; get points form user
(while (setq pt (getpoint "\nPick point: "))
(setq lst (cons pt lst))
)
(if (< 2 (length lst))
(progn
;; create the polyline
(command "_pline")
(foreach p (reverse lst)
(command "_non" p)
)
(command "")
(command "_chprop" (entlast) "" "_layer" "nyomvodal" "_ltype" "axes" "")
)
)
(princ)
)
But, typically, we save current values of the OSMODE, CLAYER and CELTYPE system variables, set new values, draw the polyline, and restore the previous values.
(defun c:nyomvodal (/ osmode clayer celtype)
;; save the current osmode, clayer and celtype
(setq osmode (getvar "osmode"))
(setq clayer (getvar "clayer"))
(setq celtype (getvar "celtype"))
;; create a new layer and make it current
(command "_layer" "_make" "nyomvodal" "_color" 3 "nyomvodal" "")
;; set the current osmode and line type
(setvar "osmode" 0)
(setvar "celtype" "AXES")
;; use vla-catch-all-apply to avoid exiting code if user cancels
(vl-catch-all-apply
'(lambda (/ pt lst)
;; get points form user
(while (setq pt (getpoint "\nPick point: "))
(setq lst (cons pt lst))
)
(if (< 2 (length lst))
(progn
;; create the polyline
(command "_pline")
(foreach p (reverse lst)
(command p)
)
(command "")
)
)
)
)
;; restore the previous system variables values
(setvar "osmode" osmode)
(setvar "clayer" clayer)
(setvar "celtype" celtype)
(princ)
)