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大家试一试用下面的程序 # G I* h9 R( ]+ O9 H4 A
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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/ o1 K7 l+ U( U- d' i;;;-----------弹簧的程序----------
5 i) p X5 l4 \ N, w3 B" l$ Y1 z1 L(defun c:spring(/)
* k! T* u. `. a! D; b* z (setq p1(getpoint "请指定螺旋线基点:")) 6 T4 T8 n* X [6 D; L5 t: `
(setq r(getreal "请输入弹簧平均半径:")) & M0 Z- b2 \, U9 Q
(setq d0(getreal "请输入弹簧丝直径:"))
8 e% l# I! l1 X! ~$ [) ] (setq disp(getreal "请输入弹簧节距:"))
8 w0 D2 O* \- G9 v8 y9 ^ (setq n0(getint "请输入弹簧工作圈数:")) ; l1 C! P- _! e3 i
(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 b/ ^" a& k; c6 `0 `4 {4 p (setq n1(* 1.25 n)) ;支撑圈细化段数 6 I+ l( F9 `7 W
(setq n1(fix n1))
2 n9 L9 f) ]& Z# m' G9 A$ M4 m (setq n2(* n0 n)) ;工作圈细化段数 5 n ^" S2 z; O( b4 u. R- A0 }
(setq delta(/ (* 2.0 pi) n)) ;单位转角 - |0 ]9 Q5 B/ e. Z" X' X: I
(setq j(/ disp n)) ;工作圈轴向位移量 ' l" C5 h0 M+ \6 r4 o$ P
(setq j0(/ d0 n)) ;支撑圈轴向位移量
/ w0 |! @- V1 b3 C3 t (setq bb(caddr p1)) 0 D z: m; i$ Z- j! U/ O( ?
(setq ang 0) ; m! N! B0 i8 b7 ?; x; Y: G6 K
(setq jj 0)
' v# y2 |# _+ o& x (command "ucs" "o" p1)
! b! O z' s1 S4 ~" d (setq pt1(list r 0 0)) ! D+ u1 o: ]1 Y7 e
(command "3dpoly" pt1)
0 i3 H' g% v. D& N6 g (repeat n1 ;绘制下支撑圈 4 v' p3 X. u& p6 [. a* V
(setq jj(+ jj 1)) & M9 z: a( N# }/ n9 a
(setq ang(+ delta ang)) & [, R; A6 d% I6 i# P0 m
(setq pt(list (* r (cos ang)) (* r (sin ang)) (* j0 jj)))
5 Z. \% k' g' Q/ t$ t+ ?( ~ (command pt) " y. d' p. ]+ H7 T
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(setq p2(list 0 0 (* j0 jj)))
% C0 U' K7 G1 ] (setq g1(* j0 jj)) ;下支撑圈高度
# U4 c; }9 m% \7 @" D (setq jj 0)
3 B; D/ q) a, J' o2 w3 E/ s7 w (repeat n2 ;绘制工作圈
( D/ p# z5 f2 N( @, B0 U (setq jj(+ jj 1)) " J7 m& v. ]* D; r! J
(setq ang(+ delta ang))
7 G+ q& A4 @( `! ` (setq pt(list (* r (cos ang)) (* r (sin ang)) (+ g1 (* j jj)))) 0 z* s1 R) d D; q8 O- I
(command pt)
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% R: o/ }0 e! [ (setq p3(list 0 0 (* j jj))) % {6 U4 R \- F! A
(setq g2(* j jj)) ;工作圈高度 $ J5 n1 G5 ]; U4 f2 X
(setq jj 0) - H5 h* e9 `. n1 [+ S% `
(repeat n1 ;绘制上支撑圈
7 v5 M" P) r2 x6 }: x (setq jj(+ jj 1))
& A- z% C, N4 C) U7 D3 Z4 c (setq ang(+ delta ang)) + I( v: @$ V4 T% H1 ^) `
(setq pt(list (* r (cos ang)) (* r (sin ang)) (+ g1 g2 (* j0 jj))))
5 X9 x/ A9 A; w* m (command pt) 7 Y8 n( _6 l$ o, N
)
; }9 {" B, {3 ^ (setq g3(* j0 jj)) ;上支撑圈高度 , e/ P, L& r' E' W, M, p* {
(command "")
3 }" Y2 V0 ^6 s* t4 o. g* o; y (setq e1(entlast))
/ i2 }& V1 `. K, C7 N' H" Z+ W (command "ucs" "x" "") ;拉伸弹簧
/ P; d( b, {5 P j (command "circle" pt1 (/ d0 2))
( \* |9 u- L) L6 ~: k0 I" p (setq e2(entlast)) : J4 B! S+ ^( ~4 V
(command "extrude" e2 "" "p" e1) # h; ^# Q7 B8 S0 a2 Q. v
(setq e3(entlast)) . c. g: Q" J Y, ^6 B) W6 T1 U
(setq pt2(list r (/ d0 4) 0)) ;磨平
& O& Z* N2 q, j2 z+ f (setq py(+ g1 g2 g3 (- 0 (/ d0 4)))) " A: o5 l2 [7 y" C0 l `
(setq pt3(list (- 0 r) py 0)) ( _2 }. |1 U/ h9 V- ]: u5 E
(command "slice" e3 "" "zx" pt2 pt3)
4 Z6 H- a& C7 p% ]' i7 T8 U* g4 [ (command "slice" e3 "" "zx" pt3 pt2)
5 @$ c$ H' K2 `- ~! P& J (command "ucs" "w") * l8 y, U; ?( {; I6 J' {$ A
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: J+ m: b" Z u;;;---------end----------弹簧程序结束！ |
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发表于 2007-4-24 10:43
楼主
