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大家试一试用下面的程序
4 O# _6 X9 i& G5 T) ` 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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- E) b+ n, |% ?" k1 U: z$ ?& S- t/ Z;;;-----------弹簧的程序---------- ( J+ \( X1 U8 N! U( F% h/ Q V
(defun c:spring(/)
7 F2 A4 o) ?. v+ h! s, H; ] (setq p1(getpoint "请指定螺旋线基点:"))
0 u& X6 D/ \/ `( s (setq r(getreal "请输入弹簧平均半径:"))
/ G3 E$ [+ v+ ` e (setq d0(getreal "请输入弹簧丝直径:"))
0 P1 S+ h x+ ^7 g2 ?% A. S" Y! \0 D (setq disp(getreal "请输入弹簧节距:"))
2 I8 t7 B" N& P; o0 o2 s (setq n0(getint "请输入弹簧工作圈数:")) # h f1 X& l# Y. t
(setq n(getint "请输入每圈细化段数(16/20/24/28/32/36/40/48/52/56/60/100):")) / q0 P0 s6 h4 j, ^. V6 E
(setq n1(* 1.25 n)) ;支撑圈细化段数 9 }( m6 W* S. l; P ^
(setq n1(fix n1)) m; _2 J" l1 e/ w0 X$ @1 f- y9 f
(setq n2(* n0 n)) ;工作圈细化段数 5 ~8 k2 G8 A3 l9 P6 @- w
(setq delta(/ (* 2.0 pi) n)) ;单位转角
7 J+ S8 W3 U5 L2 ~0 W (setq j(/ disp n)) ;工作圈轴向位移量
+ Z% Y2 y: L/ R+ t5 x (setq j0(/ d0 n)) ;支撑圈轴向位移量
5 k* D n) k" v5 `+ I9 K1 U (setq bb(caddr p1)) 9 U. f, v- j5 j$ u1 d. v6 G2 m
(setq ang 0) K4 Y2 d/ U3 t8 e Y
(setq jj 0)
% ?# N2 H2 f& f' r! y (command "ucs" "o" p1) ( L" K1 A; Z; l: q, ~" M1 Q' f
(setq pt1(list r 0 0)) 6 A- t* }7 t4 D
(command "3dpoly" pt1) : n( K( H3 ?- Z; c
(repeat n1 ;绘制下支撑圈 / [. E0 }, x& n8 k
(setq jj(+ jj 1)) 0 g: O: d& s& F, Y% ~
(setq ang(+ delta ang)) * {4 d; _7 M- Y0 t
(setq pt(list (* r (cos ang)) (* r (sin ang)) (* j0 jj)))
& f, Y+ }# A- D+ g# H. _! X (command pt) ! A. b7 R; E9 p# |- _, V
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(setq p2(list 0 0 (* j0 jj))) 1 p& E3 ~' l3 j$ [: c) `6 P6 B
(setq g1(* j0 jj)) ;下支撑圈高度
c6 r9 i2 |; n (setq jj 0)
( h) B9 K' J: t" ^2 [$ B/ y0 H (repeat n2 ;绘制工作圈 + g' q) T$ s$ e" {
(setq jj(+ jj 1)) - l( z; N. ?9 O" e8 _
(setq ang(+ delta ang)) Z2 O4 f; M. i* O
(setq pt(list (* r (cos ang)) (* r (sin ang)) (+ g1 (* j jj)))) % y) D' x& D( e0 N# B
(command pt) ' A# y; R1 k2 h4 f* b/ g
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(setq p3(list 0 0 (* j jj))) $ I) n" l& y3 c% s* e( {- N
(setq g2(* j jj)) ;工作圈高度 4 e$ @! g2 ^- b. }
(setq jj 0) # C, k4 x. ~1 X6 A1 k
(repeat n1 ;绘制上支撑圈
! ?, d) k9 k0 F% ]* `8 @ (setq jj(+ jj 1))
+ S; K6 T+ P$ U3 v4 o" H (setq ang(+ delta ang)) & e* D% ^, ?, o" |) ?' y* L8 J
(setq pt(list (* r (cos ang)) (* r (sin ang)) (+ g1 g2 (* j0 jj)))) 9 [1 b. ^$ ~4 D- c2 O, g
(command pt)
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$ ]% v: i& h/ u+ X |' B (setq g3(* j0 jj)) ;上支撑圈高度 0 Y% W" w9 o1 F! \0 ]7 [: o
(command "")
$ u) ^7 E s- B% j0 D (setq e1(entlast))
( f7 m+ s, w* M. U; n; q (command "ucs" "x" "") ;拉伸弹簧
: t6 v6 V+ I5 o (command "circle" pt1 (/ d0 2)) 5 d4 I S4 I7 K* I& D# P
(setq e2(entlast))
( e- n1 M5 p5 l& {1 E/ M( p (command "extrude" e2 "" "p" e1)
* s7 L6 [/ V2 s+ X4 V" P( ~ (setq e3(entlast)) ) S' M- O% g1 X b9 m
(setq pt2(list r (/ d0 4) 0)) ;磨平
1 h: t! P& d! a+ q$ O9 l (setq py(+ g1 g2 g3 (- 0 (/ d0 4))))
* @- z3 C8 t" E0 o5 k (setq pt3(list (- 0 r) py 0)) 9 S9 ]: W- z5 m' j+ v% Y
(command "slice" e3 "" "zx" pt2 pt3)
: a* V( A0 j- {0 ^' m: C+ ` (command "slice" e3 "" "zx" pt3 pt2) 2 l0 ?) O6 A- h q! q8 s
(command "ucs" "w") % N) O$ H+ z) u5 f8 b1 j9 V
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)
$ k, u: f$ X' s/ A;;;---------end----------弹簧程序结束! |
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