AutoLISP 自动绘制滚轮，代码如下。
(defun c:test()
(setq cen1 (getpoint "\n中心点："))
(setq rr1 (getdist cen1 "\n大圆半径："))
(command "circle" cen1 rr1)
(setq en1 (entlast))
(command "circle" cen1 "d" rr1)
(setq cen2 (polar cen1 0 rr1))
(setq rr2 (getdist cen2 "\n小圆半径："))
(setq nn (getint "\n重复次数<8>："))
(if (null nn) (setq nn 8))
(setq ang 0 ss (ssadd))
(setq angdd (/ (* pi 2) nn))
(repeat nn
(command "circle" cen2 rr2)
(setq ss (ssadd (entlast) ss))
(setq ang (+ ang angdd))
(setq cen2 (polar cen1 ang rr1))
)
(setq ang 0)
(repeat nn
(command "trim" ss "" (polar cen1 ang rr1) "")
(setq ang (+ ang angdd))
)
(setq ang1 (* -1 (/ angdd 2.0)) ang2 (+ ang1 angdd) ang 0)
(repeat nn
(command "trim" (polar cen1 ang1 rr1) (polar cen1 ang2 rr1) "" (polar cen1 ang (- rr1 rr2)) "")
(setq ang1 (+ ang1 angdd) ang2 (+ ang2 angdd) ang (+ ang angdd))
)
(prin1)
)
代码完。