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本帖最后由 476966986 于 2011-11-11 11:18 编辑
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(defun c:62-12()
# M3 G5 l7 w, ]! i4 ] (setq cen (getpoint "\n请输入中心点的位置")) " k& P) F3 |) ?& m
(setq rr1 (getdist cen "\n大圆半径: "))) w$ i; W. \5 _7 i5 A
(setq rr2 (getdist cen "\n小圆半径: "))# `1 P9 _% |' Y3 j. ?
(setq nn (getint "\n重复几次 <8>: ")); I/ a7 u' H% U& ^2 Z
(if (null nn) (setq nn 8))
" Q! Q2 ^+ b4 n (setq p4 (polar cen 0 rr1))1 E# N! I5 {$ B/ ?
(setq ang (/ pi 0.5 nn))6 D \8 ]$ i+ ` A+ W; b
(setq rr3 (/ rr2 2))3 a4 L+ e* {1 X$ g
(setq hh (sqrt (- (* rr1 rr1)(* rr3 rr3))))
* N; |' b6 ~; E6 T3 i0 I. C& c (setq ang1 (* 2 (atan (/ rr3 hh))))2 Y, p: c& E9 ]) d7 W* B, d0 d0 }
(setq p1 (polar cen -ang1 rr1))/ w9 C7 O* y1 @- g
(setq p2 (polar cen ang1 rr1))
& i) }3 @. k! c* Y2 f$ g; [ (setq p3 (polar cen (- ang ang1) rr1))
& T- A3 _/ ~7 s: F+ ~ (command "pline" p1 "a" "ce" p4 p2 "ce" cen p3 "")
f: u2 W* u- D# z" x$ s9 C& W (command "array" (entlast) "" "p" cen nn 360 "y")6 Z* X9 u6 z, T0 g
(prin1)
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