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分析以下三段AUTOLISP程序，写出每个语句起什么作用？最后该程序完成什么功能？# b5 T4 s3 v! F1 O3 l
①
# o( w# X* O% ]. u8 z/ v(defun c:erasescr( / l u)7 \0 E, ^0 z- [$ {2 C
(graphscr)
+ I' C, H7 o$ [' c0 l% A(setq l (getvar "limmin"))
( u" \4 b& H; D( W( b1 s& ~3 L(setq u (getvar "limmax"))+ @" R: I8 J+ O) ]
(command "erase" "W" l u “”)
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②
) T7 b9 y+ Y- Z(defun p3 ( )- X' a8 L# T/ I+ V
(setq r (getreal “\n number:”))
% B- |, {$ w& c0 k d n+ ~( S(setq maxr r minr r)
/ F7 h8 A4 b$ O' K6 ^(while r2 o7 @' s! [0 U3 V8 Q
(if (> r maxr) (setq maxr r))
7 {% j8 N, i" V' S& V, S% i(if (< r minr) (setq minr r))$ P" A" J' ~6 u& l% U% U/ }6 |
(setq r (getreal “\n number<return when done>:” ))
( r5 w% o7 k& w b6 _6 Y* V3 V))
( j4 O0 j3 I" O* }) G③
- y$ L+ U+ j H$ _2 D8 j* `(defun c:akey (/ d h w bp ag p1 p2)6 _& C9 h. g* n+ }
(setq d (/ (getdist “\n d＝?”) 2.0)
3 X( Y, G% W3 N, O h (getdist “\n h＝?”)
. o, \" F. a) z, l8 {# Xw (/ (getdist “\n w＝?”) 2.0)
" @' M$ ?, B9 J+ p- z% | bp (getpoint “\n center＝?”)$ r4 e+ m/ t7 O8 U: B" T
ag (atan (/ w ( sqrt (－ (* d d) (* w w))))))
1 P& x, J( r7 p5 J' r(command “pline”
7 N: k2 q7 ^: X' L: d& X# H5 \(setq p1 (polar bp (－ ag) d))( {: |+ { v" u4 v# J9 k0 f
(setq p2 (list (＋ (car bp) (－ d h)) (cadr p1)))
/ v8 r3 f6 ^, D4 c3 ~# I/ i(polar p2 (/ pi 2.0) (* w 2))( p% p' L/ c G% r5 Q0 o7 U0 w! d
(polar bp ag d)
) H' p4 s! W3 D8 G8 t“a” “ce” bp p1 “”)
4 `4 h. P9 w/ ?- f(setq ss (entlast)): X5 _" y9 o9 U9 h4 m. g) K- l
(command “hatch” “u” 45 10 “” ss “”)
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发表于 2007-12-28 14:06