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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？
% T+ \0 [2 _* F8 z①: R3 h' W% @. {" i; K0 U& f" z
(defun c:erasescr( / l u)3 d1 c, x" q& b7 E
(graphscr)
h6 q3 p1 i) W! @4 ?5 Y(setq l (getvar "limmin"))
: `4 R9 Y, L; Z, E( G) P6 F( T. E(setq u (getvar "limmax"))
0 [4 ]/ Q- n2 W" f! u8 f(command "erase" "W" l u “”)$ M& B7 K" N% H' t' @7 i
) 5 e7 A a: T) J
②- |0 s8 {! }9 V) C. D6 U: Q) @
(defun p3 ( )
( q7 C5 O0 K: p& w( Z1 H9 @. N(setq r (getreal “\n number:”))
/ U8 K! a( S- @* F& _(setq maxr r minr r)/ \ C+ [. ]& n& U
(while r7 J9 C3 M3 W% x# D" M n5 V" e
(if (> r maxr) (setq maxr r))7 X+ ^# V% g. B# H6 |: Y, p5 X3 K
(if (< r minr) (setq minr r))8 T6 G+ K5 t! Z p( P; j3 Y
(setq r (getreal “\n number<return when done>:” ))8 L5 P6 j3 U4 D1 t
)) ) F" j# L$ Q) s+ m
③
5 h: D! A; m) U5 n4 {/ m0 F(defun c:akey (/ d h w bp ag p1 p2)
; B; I' m" }7 G, T; S(setq d (/ (getdist “\n d＝?”) 2.0)
% H2 W+ K+ t; | h (getdist “\n h＝?”)( s V9 y* k- k. a. J, o/ A$ U2 F
w (/ (getdist “\n w＝?”) 2.0)* s1 _1 m6 p& A/ y, v$ L6 E; c
bp (getpoint “\n center＝?”)( S, B( Q4 M' i# Q
ag (atan (/ w ( sqrt (－ (* d d) (* w w))))))9 \4 g- F: F6 E+ S
(command “pline”
! `: e, H/ o% Y(setq p1 (polar bp (－ ag) d))
) R9 s3 f# ], ^ d" ~# q! l3 D(setq p2 (list (＋ (car bp) (－ d h)) (cadr p1)))$ M% f: c) l+ S, w
(polar p2 (/ pi 2.0) (* w 2))' q5 K" N4 ^+ L8 \
(polar bp ag d)+ F6 F" x: c+ f% Z
“a” “ce” bp p1 “”)
: U. U, @- X, F% ] g: P4 D' b9 _(setq ss (entlast))6 @* b0 d9 U1 _8 B/ Q6 B
(command “hatch” “u” 45 10 “” ss “”)
! y- k: {4 _' P) g/ C ) |
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发表于 2007-12-28 14:06