[求助]为什么不能倒多段线的圆角

xiahwan

我在论坛下载了倒反角的程序，以测试效果较好。该程序为什么不能倒多段线的圆角呢？能不能改进这个程序。

(DEFUN c:test ( / ename1 ename2 rad basrad enlast PT1 PT2 ang ang1 ang2 ptc)
   (setq ename1 (entsel "\n请选择对象1")
  ename2 (entsel "\n请选择对象2")
  rad    (getreal "\n请输入半径:")
   )
  (if (and rad ename1 ename2 (not (eq ename1 ename2)))
     (progn
       (setq basrad (getvar"filletrad"))
       (setvar "filletrad" 1)
       (command ".fillet" ename1 ename2)
       (setq enlast (entlast) DXF (ENTGET ENLAST))
       (if (= "ARC" (CDR (ASSOC 0 DXF)))
  (PROGN
    (SETQ PT1 (POLAR (CDR (ASSOC 10 DXF)) (CDR (ASSOC 50 DXF)) (CDR (ASSOC 40 DXF))))
    (SETQ PT2 (POLAR (CDR (ASSOC 10 DXF)) (CDR (ASSOC 51 DXF)) (CDR (ASSOC 40 DXF))))
    (command "_.erase" enlast "")
    (setq ang1 (CDR (ASSOC 50 DXF)) ang2 (CDR (ASSOC 51 DXF)))
    (if (> ang1 ang2)
      (setq ang1 (- ang1 (* pi 2.0)))
    )
    (setq ang (/ (- ang2 ang1) 2))
    (setvar "filletrad" (/ rad (/ (sin ang) (cos ang))))
    (command ".fillet" ename1 ename2)
           (setq enlast (entlast) DXF (ENTGET ENLAST))
    (SETQ PT1 (POLAR (CDR (ASSOC 10 DXF)) (CDR (ASSOC 50 DXF)) (CDR (ASSOC 40 DXF))))
    (SETQ PT2 (POLAR (CDR (ASSOC 10 DXF)) (CDR (ASSOC 51 DXF)) (CDR (ASSOC 40 DXF))))
    (setq ptc (POLAR (CDR (ASSOC 10 DXF)) (+ ang1 ang) (/ (CDR (ASSOC 40 DXF)) (cos ang))))
    (command "_.arc" "c" ptc pt2 pt1)
    (command "_.erase" enlast "")
  )
       (setvar "filletrad" basrad)
       )
     )
    )
  (princ)
   )
敬请高手帮忙！！！！！！！！！！