Unire layer in uno solo ed eliminare gli altri

Testo semplice, niente di nascosto. Copialo in un file chiamato cxlaymrg.lsp oppure scaricalo.

;;; ============================================================================
;;; CXLAYMRG - Merge layers into one and delete the rest
;;; Version 1.0.0
;;; CADXChange LISP tools - https://cadxchange.net/resources/lisp/cxlaymrg
;;; Tested in: AutoCAD (full version). Other programs that run AutoLISP may work but are not tested.
;;; Copyright (c) CADXChange. Free for personal and commercial use; do not resell or
;;; republish it as a collection. Terms: https://cadxchange.net/legal/lisp-terms
;;; ============================================================================

;; Move everything on the layers in FROM to layer TO, in model space and in the layouts, then delete the
;; emptied layers. Layer 0, Defpoints, the target and the current layer are never deleted.
;; Returns (objects-moved layers-deleted).
(defun cx:laymrg-run (from to / moved deleted ss i ed)
  (setq moved 0 deleted 0)
  (foreach name from
    (if (and (/= (strcase name) (strcase to)) (setq ss (ssget "X" (list (cons 8 name)))))
      (progn
        (setq i 0)
        (repeat (sslength ss)
          (setq ed (entget (ssname ss i)))
          (entmod (subst (cons 8 to) (assoc 8 ed) ed))
          (setq moved (1+ moved) i (1+ i))))))
  (foreach name from
    (if (and (/= (strcase name) (strcase to))
             (/= name "0")
             (/= (strcase name) "DEFPOINTS")
             (/= (strcase name) (strcase (getvar "CLAYER"))))
      (progn
        (command "_.-PURGE" "_LA" name "_N")
        (if (not (tblsearch "LAYER" name)) (setq deleted (1+ deleted))))))
  (list moved deleted))

(defun c:CXLAYMRG ( / *error* cx:sv ss src to r)
  (setq *error* cx:err)
  (if (setq ss (cx:pick "\nSelect objects on the layers to merge away: " nil))
    (if (setq src (car (entsel "\nSelect an object on the layer to merge into: ")))
      (progn
        (setq to (cdr (assoc 8 (entget src))))
        (cx:start '(("CMDECHO" . 0)))
        (setq r (cx:laymrg-run (cx:layers-of (cx:ss->list ss)) to))
        (princ (strcat "\n" (itoa (car r)) " object(s) moved to " to ", " (itoa (cadr r)) " layer(s) deleted."))
        (cx:end))))
  (princ))


;;; ---- Shared helpers (used by the command above; identical in every CADXChange tool) ----

;; Close the undo step and put the system variables back.
(defun cx:end ()
  (foreach v cx:sv (setvar (car v) (cdr v)))
  (command "_.UNDO" "_End")
  (setq cx:sv nil)
  (princ))

;; Error handler: restores everything, stays quiet on Esc.
(defun cx:err (msg)
  (if (> (getvar "CMDACTIVE") 0) (command))
  (cx:end)
  (if (and msg (not (wcmatch (strcase msg) "*BREAK*,*CANCEL*,*EXIT*")))
    (princ (strcat "\nError: " msg)))
  (princ))

;; Use the objects already selected, or ask the user to select; FILTER is an ssget filter list or nil.
(defun cx:pick (msg filter / ss)
  (setq ss (if filter (ssget "_I" filter) (ssget "_I")))
  (if (null ss)
    (progn
      (princ msg)
      (setq ss (if filter (ssget filter) (ssget)))))
  ss)

;; Save the system variables in VARS ((name . value) ...), set them, and open one undo step.
;; The caller declares cx:sv as a local so the saved values live exactly as long as the command.
(defun cx:start (vars)
  (setq cx:sv (mapcar (function (lambda (v) (cons (car v) (getvar (car v))))) vars))
  (command "_.UNDO" "_Begin")
  (foreach v vars (setvar (car v) (cdr v)))
  (princ))

;; The distinct layer names used by the entities in NAMES, in order of first use.
(defun cx:layers-of (names / out l)
  (foreach e names
    (setq l (cdr (assoc 8 (entget e))))
    (if (not (member l out)) (setq out (cons l out))))
  (reverse out))

;; Selection set to a list of entity names.
(defun cx:ss->list (ss / i out)
  (setq i 0)
  (if ss
    (repeat (sslength ss)
      (setq out (cons (ssname ss i) out)
            i   (1+ i))))
  (reverse out))

(princ "\nCXLAYMRG loaded. Type CXLAYMRG to start.")
(princ)

Altri comandi: Layer

• CXLAYISOIsolare i layer degli oggetti che scegli
• CXLAYRESRipristinare i layer disattivati da CXLAYISO
• CXLAYOFFDisattivare i layer degli oggetti che scegli
• CXLAYCOLORCambiare il colore dei layer che scegli
• CXLAYRENRinominare i layer con trova e sostituisci
• CXLAYSETSpostare oggetti sul layer di un altro oggetto
• CXLAYCOUNTContare gli oggetti su ogni layer
• CXLAYSELSelezionare tutto ciò che sta sui layer che scegli
• CXLAYSTDCreare un set di layer da un elenco CSV