[讨论]龙龙仔，你好

runkeji · 发表于 2003-9-2 10:42:00

；；（VL-LOAD-COM）
；；(vl-acad-defun 'gx)
(defun c:gx (/ a ent1 ent2 ent_tt)
  (setq b (ssget "x"))
  (command "_.explode" b "")
  (setq b (ssget "x"))
  (command "_.pedit" b "" "j" "" "")
(setq a (ssget "x"))
  (command "_.region" a "")
  (prompt "\n选择实体")
  (setq a (ssget "x"))
  (setq ent1 (ssname a 0))
  (setq ent2 (ssname a 1))
  ;(setq ent1 (car(entsel "\n选择从中减去的实体或选择外腔")))
  ;(setq ent2 (car(entsel "\n选择减去的实体或者选择内腔")))
  (while(or (not ent1)(not ent2))
(prompt"\n 请重新选择实体计算差集")
   (setq ent1 (car(entsel "\n选择从中减去的实体或选择外腔")))
   (setq ent2 (car(entsel "\n选择减去的实体或选择内腔")))
)
(if (vla-object ent1)) (vla-get-area (vlax-ename->vla-object ent2)))
(progn
   (setq ent_tt ent1)
   (setq ent1 ent2)
   (setq ent2 ent_tt)
   )
)
  (command "subtract" ent1 "" ent2 "")
  (setq ent1 (entlast))
  (princ "\n")
  (setq ent2 (vla-get-momentofinertia (vlax-ename->vla-object ent1)))
  ；；；；(setq lst (vlax-safearray->list (vlax-variant-value ent2)))
;;;;在R14 里面我用 (setq  lst (vl-list*  ent2))
  (setq lst (vl-list*  ent2))
  (princ (strcat "惯性矩:  x值:" (rtos (car lst)1)  "\n"))
  (princ (strcat "       y值:" (rtos (cadr lst)1)  "\n"))
  (princ)
)
用这函数（VL-LIST*  ENT2  ）  能够和在2004里面用(setq lst (vlax-safearray->list (vlax-variant-value ent2)))
取得相同的结果。但是在2004里面对于（VL-LIST* ENT2）就会报错的。

[讨论]龙龙仔，你好

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[讨论]龙龙仔，你好