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大家试一试用下面的程序 2 N4 W/ h. b7 e+ |+ |0 c$ |7 b
把下面这段程序放入autocad2004的安装的目录下面的support目录里面的acad2004doc.lsp文件里面(用记事本打开),以后你在cad里面的command:输入:spring ,就可以绘制弹簧了!
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;;;-----------弹簧的程序---------- ; J# M+ n3 ^5 b) ]7 p/ A" t
(defun c:spring(/)
. \9 z. _0 p: E+ F (setq p1(getpoint "请指定螺旋线基点:")) 9 [* ~8 i v3 u6 l6 f8 t
(setq r(getreal "请输入弹簧平均半径:")) % i0 k/ f0 {# M4 Q4 `% C3 H) z& _
(setq d0(getreal "请输入弹簧丝直径:")) ( Y- C, j: ^/ I( i
(setq disp(getreal "请输入弹簧节距:"))
9 E& t$ l. W) P' Y# v% u5 S (setq n0(getint "请输入弹簧工作圈数:")) : W" H8 j* _) e0 U7 J
(setq n(getint "请输入每圈细化段数(16/20/24/28/32/36/40/48/52/56/60/100):"))
, ]6 U) m4 m9 J4 x) x% x0 j9 M5 L (setq n1(* 1.25 n)) ;支撑圈细化段数
5 y+ A' V0 W' L& w$ a4 l( s& k (setq n1(fix n1))
9 g# E" n& y8 h7 e/ Z, W& W0 D (setq n2(* n0 n)) ;工作圈细化段数 $ c' k! o- m! P2 C7 q7 S4 V
(setq delta(/ (* 2.0 pi) n)) ;单位转角 - o2 J8 L. d3 ~" G8 u/ w$ Q; ?" v
(setq j(/ disp n)) ;工作圈轴向位移量 5 ?+ t- }( X& m5 \
(setq j0(/ d0 n)) ;支撑圈轴向位移量 ! Z6 U3 O. h; z8 I
(setq bb(caddr p1)) 2 U- F- H# W5 J! X% q
(setq ang 0)
% k; A: z8 e8 `1 j) L (setq jj 0) : H' M9 u. y+ }0 F4 e: p
(command "ucs" "o" p1) % F" x7 K2 O% t. Z2 Y& }
(setq pt1(list r 0 0))
" Z# v, k9 y1 [" h/ U( D (command "3dpoly" pt1) 6 l( ]/ E; |, h% J5 O( T
(repeat n1 ;绘制下支撑圈
6 I- y9 L' Y$ D. k8 x. j (setq jj(+ jj 1))
9 v' [/ [: D1 y/ w; e (setq ang(+ delta ang))
# M1 T( w/ H8 f/ e+ j( a( B (setq pt(list (* r (cos ang)) (* r (sin ang)) (* j0 jj)))
! p$ E8 T B8 w# Z0 R' f (command pt) ( g' h6 h0 z) \5 X3 Y
)
2 I$ s2 f0 U0 M( N) u (setq p2(list 0 0 (* j0 jj))) 8 y+ v* A& s0 Z9 b) H8 |& B
(setq g1(* j0 jj)) ;下支撑圈高度
3 |1 z1 h2 w5 y" Y6 n% @ (setq jj 0) 1 b' D4 I Z! k9 @2 Y, o. L, m1 h
(repeat n2 ;绘制工作圈 + C; A) F( {! l2 p3 N" _
(setq jj(+ jj 1))
: X6 F" l8 [, ?2 ^) P6 D" Y7 a (setq ang(+ delta ang)) $ u6 `- k4 B* p% G
(setq pt(list (* r (cos ang)) (* r (sin ang)) (+ g1 (* j jj))))
+ k7 g) C3 l5 _ (command pt) 9 F: T3 c1 g. d! h' H! f
)
* C/ A* [- y4 M" W1 \" w (setq p3(list 0 0 (* j jj)))
+ g0 d% H* b6 i (setq g2(* j jj)) ;工作圈高度 6 k. L- C/ {# Z. K/ j
(setq jj 0)
. z, S8 Q3 w- d7 y+ M& H/ p' k (repeat n1 ;绘制上支撑圈
9 R; V# T! p, ~, N- x1 w, n# L% i( S( U (setq jj(+ jj 1)) ' |% C* Q) q3 d( y
(setq ang(+ delta ang)) ; d! H# X( f" N( q7 B; D
(setq pt(list (* r (cos ang)) (* r (sin ang)) (+ g1 g2 (* j0 jj))))
7 m& Y; K4 Q% X (command pt) 1 B: A% W8 o6 ] q
)
5 n3 q, R2 e9 e/ @: i+ k( e (setq g3(* j0 jj)) ;上支撑圈高度 2 n/ b6 _: w! i$ Q9 R" G
(command "")
, n3 `$ B; d0 N- L (setq e1(entlast)) ) W! f% ~5 Q1 m$ t. {% O' C- |
(command "ucs" "x" "") ;拉伸弹簧
! S1 T' d* s2 R8 Y! i- ?3 x$ s (command "circle" pt1 (/ d0 2))
3 K* v4 {& ~( D (setq e2(entlast))
" n: c% E4 Q: o9 {% i! c (command "extrude" e2 "" "p" e1) 0 L+ p2 L/ W7 e5 ~' w7 U* G
(setq e3(entlast))
; C( g( R3 p+ Y- i# G- @ (setq pt2(list r (/ d0 4) 0)) ;磨平 1 @2 q0 q( f8 k" T# R$ f7 q. D! ~
(setq py(+ g1 g2 g3 (- 0 (/ d0 4))))
& y& d/ O, l/ O' {5 S (setq pt3(list (- 0 r) py 0)) ! s( b2 ^) [0 J: E
(command "slice" e3 "" "zx" pt2 pt3) 8 @5 D s3 B7 w5 C" v+ L0 D# S% O
(command "slice" e3 "" "zx" pt3 pt2) k. Y; z, r% @/ l3 {: j, v2 h
(command "ucs" "w")
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;;;---------end----------弹簧程序结束! |
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