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.
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)
)