AutoLISP等分线段并绘图

AutoLISP等分线段，并在每一段线上绘图，代码如下。

(defun c:test()
  (setvar "cmdecho" 0)
  (setq en (car (entsel "\n选取线：")))
  (setq nn (getint "\n重复次数<5>："))
  (if (null nn) (setq nn 5))
  (setq endata (entget en))
  (setq pt_10 (cdr (assoc 10 endata)))
  (setq pt_11 (cdr (assoc 11 endata)))
  (setq ang (angle pt_10 pt_11))
  (setq dd (distance pt_10 pt_11))
  (setq bas1 pt_10)
  (setq dd_nn (/ dd nn))
  (repeat nn
    (setq bas2 (polar bas1 ang dd_nn))
    (command "arc" bas1 "e" bas2 "a" 180)
    (command "polygon" 3 "e" bas1 bas2)
    (setq bas1 bas2)
    )
  (entdel en)
  (prin1)
  )

代码完。