[求助]：困擾我好久了!

fend_2000 · 发表于 2004-8-30 15:16:00

如何将spline转换成pline?听说：龙斑竹用LISP编过，实在是搜不到，帮一下小弟！多谢!

spring · 发表于 2004-8-30 15:50:00

;;BY LUCAS(龙龙仔)
;;将spline等分为n个弧,再转为pline
;;只对2D spline有效, 3D spline要改用3dpoly
(defun C:SPLINE_TO_PLINE (/ HOLDECHO    OS    SSS NUMPT N
   ED ED1    PTST    PTEND SS2 PT1    PT2
   PT3 J    ENT    NNO    SS SSL
   )
   (defun VAL1 (N SS INDEX)
   (cdr (assoc N (entget (ssname SS INDEX))))
   )
   (defun CH_IT (NOS)
   (if (assoc NOS ED)
   (progn
(if (assoc NOS ENT)
   (setq ENT (subst (assoc NOS ED) (assoc NOS ENT) ENT))
   (setq ENT (append ENT (list (assoc NOS ED))))
)
(entmod ENT)
   )
   )
   )
   (setq HOLDECHO (getvar "cmdecho"))
   (setvar "cmdecho" 0)
   (command "_.undo" "group")
   (setq OS (getvar "osmode"))
   (setvar "osmode" 0)
   (prompt "\nPlease pick the spline: ")
   (setq SSS (ssget '((0 . "spline"))))
   (if SSS
   (progn
   (initget (+ 1 2 4))
   (setq NUMPT
   (getint
   "\nPlease specify the accuracy of conversion: "
   )
   )
   (setq N 0)
   (setq SSL (sslength SSS))
   (repeat SSL
(prompt (strcat "\r馀 " (itoa (- SSL N)) " 个物件    "))
(setq ED1 (ssname SSS N))
(setq ED (entget ED1))
(setq PTST    (cdr (assoc 10 ED))
   PTEND (cdr (assoc 10 (reverse ED)))
)
(command "_.divide" ED1 (* 2 NUMPT))
(setq SS2 (ssget "p"))
(if (= (logand (cdr (assoc 70 ED)) 1) 1)
   (setq J 1)
   (setq J 0)
)
(setq PT3 PTST)
(setq SS (ssadd))
(repeat NUMPT
   (setq PT2 (VAL1 10 SS2 J))
   (if (/= NUMPT (/ (+ J 2) 2))
   (setq PT1 (VAL1 10 SS2 (+ 1 J)))
   (setq PT1 PTEND)
   )
   (command "_.arc" PT3 PT2 PT1)
   (ssadd (entlast) SS)
   (setq PT3 PT1)
   (setq J (+ 2 J))
)
(command "_.pedit" (ssname SS 1) "" "j" SS "" "")
(setq ENT (entget (entlast)))
(foreach NNO '(6 8 62 48)
   (CH_IT NNO)
)
(command "_.erase" SS2 ED1 "")
(setq N (1+ N))
   )
   (prompt (strcat "\r完成转换    ")
   )
   )
   (alert "Nothing selected!!")
   )
   (setvar "osmode" OS)
   (command "_.undo" "end")
   (setvar "cmdecho" HOLDECHO)
   (princ)
)