[综合讨论] 创建V形的Lisp例程

; chevron island creater
; this use the extrim command to trim shape
; By Alan H Jan 2012
(defun C:Chevron ( / obj pt1 pt2 pt3 pt4 newpt1 newpt2 )
(acet-error-init (list
                  (list   "cmdecho" 0
                        "highlight" 0
                        "regenmode" 1
                           "osmode" 0
                          "ucsicon" 0
                       "offsetdist" 0
                           "attreq" 0
                         "plinewid" 0
                        "plinetype" 1
                         "gridmode" 0
                          "celtype" "CONTINUOUS"
                        "ucsfollow" 0
                         "limcheck" 0
                  )
                  T     ;flag. True means use undo for error clean up.
                  '(if redraw_it (redraw na 4))
                 );list
);acet-error-init
(setq obj (car (entsel "\nPick pline or circle")))
; should do a object test here
(setq whatis (cdr (assoc 0 (entget obj))))
(if (= whatis "LWPOLYLINE")
(princ)
(progn
(princ "\You have picked something other than a polyline ")
(princ "\Remake into a pline and do again ")
(setq dummy (getstring "\press any key"))
(exit)
) ; progn
) ; if
(setq pt1 (Getpoint "\nPick Line start point"))
(setq pt2 (Getpoint pt1 "\nPick end point"))
(command "line" pt1 pt2 "")
(setq gap1 (getreal "\nenter spacing 1"))
(setq gap2 (getreal "\nenter spacing 2"))
(setq pt3 (getpoint "\nPick 1st cross point"))
(setq pt4 (getpoint pt3 "\nPick 2nd cross point"))
(setq dist (distance pt3 pt4))
(setq x (fix (/ dist (+ gap1 gap2))))
(setq newpt1 (strcat (rtos gap1 2 2) ",0.0"))
(setq newpt2 (strcat (rtos gap2 2 2) ",0.0"))
(repeat x 
(command "copy" "L" "" "0,0" newpt1)
(command "copy" "L" "" "0,0" newpt2)
)
(load "Extrim")
(etrim obj pt1)
(acet-error-restore)
) ; end defun
(princ)

; removed as I dont want to be sued by Maunsell's