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大家试一试用下面的程序
+ ?% k- p) l: n. F 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！ ' r) N6 G" R# |! `
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;;;-----------弹簧的程序---------- 7 `( P+ E, n% C- l) y" R5 g
(defun c:spring(/)
6 T, M" o, i" K8 Q (setq p1(getpoint "请指定螺旋线基点:")) # v( ], f9 s# B/ t
(setq r(getreal "请输入弹簧平均半径:")) 6 M8 | V5 W9 f
(setq d0(getreal "请输入弹簧丝直径:")) 2 R% V0 Z: i7 L+ w. i7 x
(setq disp(getreal "请输入弹簧节距:"))
# ?7 }$ D. O# C (setq n0(getint "请输入弹簧工作圈数:"))
( H% S; `; i: p8 m( D (setq n(getint "请输入每圈细化段数(16/20/24/28/32/36/40/48/52/56/60/100):"))
8 l6 t. j1 t% m( D4 c8 C" [5 D \ (setq n1(* 1.25 n)) ;支撑圈细化段数 " O: a( C4 A# h! r
(setq n1(fix n1))
U5 Y: X0 r e# b* j1 F4 b (setq n2(* n0 n)) ;工作圈细化段数
0 u. k" A! L; z1 H" \4 t; K (setq delta(/ (* 2.0 pi) n)) ;单位转角 ' e" A5 k! O6 h. A& @( }3 T
(setq j(/ disp n)) ;工作圈轴向位移量
* }+ y6 Z* V& S9 V (setq j0(/ d0 n)) ;支撑圈轴向位移量
" B; k# G8 i: E- [% t/ g- G0 u, G) t (setq bb(caddr p1))
0 V, M4 Y2 Z! E0 U4 N) a (setq ang 0)
5 S3 L7 ]' B Q2 g! p (setq jj 0)
- O/ p& }5 `" O& M, [! E! A (command "ucs" "o" p1) - T3 I5 r: [6 G9 @. Z$ ]0 v
(setq pt1(list r 0 0))
! d+ L( @+ I- G' N; _: c% w9 [6 d (command "3dpoly" pt1)
1 D+ u. r; M& n) m# M+ G+ c (repeat n1 ;绘制下支撑圈 0 d2 I4 t0 i1 ^6 t7 `
(setq jj(+ jj 1)) # n; V) }4 _# u3 ^" B$ D# l- }" E
(setq ang(+ delta ang)) 7 B9 ~3 M- }' L& P8 Q* h
(setq pt(list (* r (cos ang)) (* r (sin ang)) (* j0 jj)))
9 ^7 m0 Z! u# Y (command pt) 6 F% T$ V" X) O' K
)
: S. O3 i/ T( K9 q) |5 P6 p (setq p2(list 0 0 (* j0 jj))) 4 S e. r# q' F0 `
(setq g1(* j0 jj)) ;下支撑圈高度 " w/ D# e2 d: f) y3 j- |
(setq jj 0) : X" a8 ~+ V' B( M( o. W% |6 M
(repeat n2 ;绘制工作圈
# G# d# m9 C9 e7 G( X5 I+ R (setq jj(+ jj 1))
; W6 F, w4 X7 `, e; b (setq ang(+ delta ang))
$ t0 H, v* K' d- Q$ n4 [' L' m (setq pt(list (* r (cos ang)) (* r (sin ang)) (+ g1 (* j jj))))
) T- N1 |( c" W' _' d m7 k! b9 f: Z (command pt) 5 u9 ]+ q# E u p) z
)
" R! X( ]" b+ w; y2 s: F$ m (setq p3(list 0 0 (* j jj)))
9 ]8 t* \2 K5 w1 x& m1 y# X7 H (setq g2(* j jj)) ;工作圈高度 7 I* T3 ]4 K; g+ S; ]
(setq jj 0) % l/ ~; H% T# J/ @& ? l& Q
(repeat n1 ;绘制上支撑圈
9 B- R- o! K4 S p (setq jj(+ jj 1)) . }' r! r& }: D& Y& _6 F9 z
(setq ang(+ delta ang)) " i- D( Q2 r. `& j$ Q
(setq pt(list (* r (cos ang)) (* r (sin ang)) (+ g1 g2 (* j0 jj)))) 6 J! s2 g) v" v' n
(command pt)
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) e% D9 f" s0 N- n5 R (setq g3(* j0 jj)) ;上支撑圈高度 & k0 p* a6 ^ ?" Z3 G3 j6 L, M
(command "") % c7 Q- d7 a5 t7 M3 N3 i
(setq e1(entlast)) ( L3 c+ |6 p4 {/ Z' t. C+ u
(command "ucs" "x" "") ;拉伸弹簧
) i& E0 P0 B1 J. m( F @ (command "circle" pt1 (/ d0 2)) + \4 h; i' h9 O4 Z1 D3 I* h
(setq e2(entlast)) " I5 L5 N6 |/ C% b" u
(command "extrude" e2 "" "p" e1) $ Y# ^- S3 \- A- ~1 v" N% i @5 S, E
(setq e3(entlast)) 3 m1 Z/ y# ^. T7 y
(setq pt2(list r (/ d0 4) 0)) ;磨平
5 f* Y# z- W& f$ o (setq py(+ g1 g2 g3 (- 0 (/ d0 4))))
* F- I7 A$ \5 k& W8 P$ ~0 | (setq pt3(list (- 0 r) py 0))
d$ ?. b; K: Q/ U9 A (command "slice" e3 "" "zx" pt2 pt3)
! I8 x" v( F- |& U (command "slice" e3 "" "zx" pt3 pt2) 7 w& S; m1 {; W }3 J
(command "ucs" "w") / G1 ~) T9 P7 s
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% \' R* r7 j. u: B;;;---------end----------弹簧程序结束！ |
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发表于 2007-4-24 10:43
楼主
