)

(defun c:ai_fms ( / fmsa fmsb)
  (setq m:err *error* *error* *merr*)
  (ai_undo_push)
  (if (getvar "TILEMODE") (setvar "TILEMODE" 0))
  (setq fmsa (vports) fmsb (nth 0 fmsa))
  (if (member 1 fmsb)
    (if (> (length fmsa) 1)
      (command "_.mspace")
      (progn
        (ai_sysvar '("cmdecho" . 1))
        (command "_.mview")
        (while (eq 1 (logand 1 (getvar "CMDACTIVE")))
          (command pause)
        )
        (ai_sysvar NIL)
        (command "_.mspace")
      )
    )
  )
  (ai_undo_pop)
  (setq *error* m:err m:err nil)
  (princ)
)

(defun ai_onoff (var)
  (setvar var (abs (1- (getvar var))))
  (princ)
)

;;; go to paper space
(defun c:ai_pspace ()
  (ai_undo_push)
  (if (/= 0 (getvar "tilemode"))
    (command "_.tilemode" 0)
  )
  (if (/= 1 (getvar "cvport"))
    (command "_.pspace")
  )
  (ai_undo_pop)
  (princ)
)

;;; go to tilemode 1
(defun c:ai_tilemode1 ()
  (ai_undo_push)
  (if (/= 1 (getvar "tilemode"))
    (command "_.tilemode" 1)
  )
  (ai_undo_pop)
  (princ)
)

;;; Pop menu Draw/ Dim/ Align Text/ Centered
;;; Toolbar Dimensions/ Align Text/ Centered

(defun ai_dim_cen (/ ai_sysvar ai_dim_ss)
  (setq ai_sysvar (getvar "cmdecho"))
  (setvar "cmdecho" 0)
  (cond
    ((setq ai_dim_ss (ssget  "_P" '((0 . "DIMENSION"))))
      (command "_.dimoverride" "_dimjust" 0 "" ai_dim_ss "" 
               "_.dimtedit" ai_dim_ss "_h")
    )
    (T nil)
  )
  (setvar "cmdecho" ai_sysvar)
  (princ)
)

;;; Shortcut menu for Dimension Text Above 

(defun c:ai_dim_textabove (/ ss)
  (ai_sysvar '("cmdecho" . 0))
  (if (setq ss (ssget "_I"))
    (command "_.dimoverride" "_dimtad" 3 "" ss "")
    (if (setq ss (ssget))
      (command "_.dimoverride" "_dimtad" 3 "" ss "") 
    )
  )
  (ai_sysvar NIL)
  (princ)
)

;;; Shortcut menu for Dimension Text Center 

(defun c:ai_dim_textcenter (/ ss)
  (ai_sysvar '("cmdecho" . 0))
  (if (setq ss (ssget "_I"))
    (command "_.dimoverride" "_dimtad" 0 "" ss "")
    (if (setq ss (ssget))
      (command "_.dimoverride" "_dimtad" 0 "" ss "") 
    )
  )
  (ai_sysvar NIL)
  (princ)
)

;;; Shortcut menu for Dimension Text Home 

(defun c:ai_dim_texthome (/ ss)
  (ai_sysvar '("cmdecho" . 0))
  (if (setq ss (ssget "_I"))
    (command "_.dimedit" "_h")
    (if (setq ss (ssget))
      (command "_.dimedit" "_h" ss)
    )
  )
  (ai_sysvar NIL)
  (princ)
)


;;; Screen menu item for CIRCLE TaTaTan option.
;;;     first, get points on entities
(defun ai_circtanstart()
   (setq m:err *error* *error* *merr*)
   (ai_sysvar 
      (list '("cmdecho" . 0)
         ;; make sure _tan pick for CIRCLE gets same entity
         (cons "aperture"  (getvar "pickbox"))
          )
   )
   ;; prompts are the same as CIRCLE/TTR command option
   (setq pt1 (ai_entsnap "\n輸入切點定義: "  nil))
   (setq pt2 (ai_entsnap "\n輸入第二個切點的定義: " nil))
   (setq pt3 (ai_entsnap "\n輸入第三個切點的定義: "  nil))
)
;;; Command-line version
(defun c:ai_circtan (/ pt1 pt2 pt3)
   (ai_circtanstart)

   (ai_sysvar '("osmode" . 256))
   (command "_.circle" "_3p" "_tan" pt1 "_tan" pt2 "_tan" pt3)
   
   (ai_sysvar nil)
   (setq *error* m:err m:err nil)
   (princ)
)
;;; Use this if CMDNAMES == CIRCLE
(defun ai_circtan (/ pt1 pt2 pt3)
   (ai_circtanstart)

   (ai_sysvar '("osmode" . 256))
   (command "_3p" pt1  pt2  pt3)
   
   (ai_sysvar nil)
   (setq *error* m:err m:err nil)
   (princ)
)



;;;=== Make Object's Layer Current =============================

;; Makes the layer of the selected object current.  If there is one
;; object in the pickfirst set, it's layer is made current without
;; prompting for an object.  Else a prompt is issued.
(defun c:ai_molc(/ old_error end_undo old_cmdecho set1 ent undo_control)
  
  ;; Simple error handling.
  (defun molc_error (s)
    ;; Reset error handling.
	(if old_error (setq *error* old_error))
	;; End undo if we started one.
	(if (eq end_undo 1) (command "_.undo" "_end"))
	;; Reset command echo
	(if old_cmdecho (setvar "cmdecho" old_cmdecho))
	;; Silent exit.
	(princ)
  )
  
  ;; Save current error function.
  (setq old_error *error*)
  
  ;; Set error handling to molc's error function.
  (setq *error* molc_error)
  
  ;; Save cmdecho setting.
  (setq old_cmdecho (getvar "cmdecho"))
  
  ;; Turn off cmdecho
  (setvar "cmdecho" 0)
   
  ;; If Pickfirst is on and the selction set contains 
  ;; one object, then use it, else prompt for one.
  (if (and (eq 1 (logand 1 (getvar "pickfirst")))
            (setq set1 (ssget  "_i"))
	        (eq 1 (sslength set1))
	  )
     (progn 
	   (setq ent (entget (ssname set1 0)))   	 
       (sssetfirst nil nil)
	 )
	 (progn 
	   (sssetfirst nil nil)
	   (setq ent (entget (car (entsel "\n選擇將使其圖層成為當前圖層的對象:  "))))
	 )
  )
  
  ;; Get undo setting.
  (setq undo_control (getvar "undoctl"))
  
  ;; Initialize flag to to end undo.
  (setq end_undo 0)
  
  ;; Begin Undo group if need be.
  (if (and (= 1 (logand 1 undo_control))   ; undo on
           (/= 2 (logand 2 undo_control))  ; not single undo
      	   (/= 8 (logand 8 undo_control))  ; no active group
	  )
	  (progn 
	    ;; Begin a new one
		(command "_.undo" "_begin")
   		;; Set flag so that we know to end undo.
	    (setq end_undo 1)
      )
  )

  ;; Make object's layer current.
  (setvar "clayer" (cdr (assoc '8 ent)))
  
  ;; Print message
  (princ (strcat "\n" (getvar "clayer") " 現在是當前圖層。"))
    
  ;; Undo end
  (if (eq 1 end_undo)
    (command "_.undo" "_end")
  )
  
  ;; Turn on cmdecho
  (setvar "cmdecho" old_cmdecho)
  
  ;; Reset error function.
  (setq *error* old_error)
  
  ;; Silent exit.
  (princ)
)

;;; Shortcut menu Deselect All item.

(defun ai_deselect ()
   (if (= (getvar "cmdecho") 0)			;start if
       (command "_.select" "_r" "_all" "")
       (progn					;start progn for cmdecho 1
           (setvar "cmdecho" 0)
           (command "_.select" "_r" "_all" "")
           (setvar "cmdecho" 1)
       )					;end progn for cmdecho 1
   )						;end if
   (terpri)
   (prompt "所有對象都已取消選擇")
   (princ)
)

;;;
;;; Enable Draworder to be called from a menu
;;; Checks for Pickfirst selected objects
;;;

(defun ai_draworder (option / ss )

  (setq m:err *error* *error* *merr*)
  (ai_sysvar '("cmdecho" . 0))

  (if (setq ss (ssget "_I"))
    (command "_.draworder" option)
    (if (setq ss (ssget))
      (command "_.draworder" ss "" option)
    )
  )
  (ai_sysvar NIL)
  (setq *error* m:err m:err nil)

  (princ)
)

(defun c:vlisp ()
  (if (/= nil c:vlide) (c:vlide))
)

(princ "已加載。")
(princ)