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大家试一试用下面的程序 6 K" [& Q; X! x$ j2 d/ M
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! : O) u; s! r& m$ s' E7 D& c
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;;;-----------弹簧的程序----------
2 Y @) z& |* v( c+ P(defun c:spring(/) . ~7 M2 f1 ~4 u# L2 O- q; V0 \
(setq p1(getpoint "请指定螺旋线基点:")) - b, d }- D2 A a1 Q
(setq r(getreal "请输入弹簧平均半径:")) ! o" Y& q' @- |
(setq d0(getreal "请输入弹簧丝直径:"))
$ f5 |; f2 Q; @: Y; B' @3 l3 p+ d (setq disp(getreal "请输入弹簧节距:"))
; h6 b- v. i9 ? (setq n0(getint "请输入弹簧工作圈数:"))
* _# q* v* c4 S- [" b (setq n(getint "请输入每圈细化段数(16/20/24/28/32/36/40/48/52/56/60/100):"))
; x; P4 z! W- J$ k5 _) c: h! b (setq n1(* 1.25 n)) ;支撑圈细化段数 5 S! E% I( s8 f1 h5 s
(setq n1(fix n1))
. L# S& J7 w! B+ L" b (setq n2(* n0 n)) ;工作圈细化段数
2 W( G# F/ d' e' U3 @ L& _ (setq delta(/ (* 2.0 pi) n)) ;单位转角 e8 ?' v3 a. G% c. B# F H
(setq j(/ disp n)) ;工作圈轴向位移量
4 B7 |0 b3 t- M* F5 H4 l% N) ] (setq j0(/ d0 n)) ;支撑圈轴向位移量
8 ^7 H3 V7 Q2 A+ x$ w (setq bb(caddr p1)) " R% V# t) x1 F+ Q
(setq ang 0) 6 U/ M! M/ Q" f
(setq jj 0) # i% d( q) T2 C, ~3 d0 ~6 w
(command "ucs" "o" p1)
9 Q; ?& _, {: l (setq pt1(list r 0 0)) I+ w( m, W* l' Z; \
(command "3dpoly" pt1)
0 W& Y& C5 l+ `3 V9 Y# J% ? (repeat n1 ;绘制下支撑圈 . ?) G- W8 u# h- F8 e( O
(setq jj(+ jj 1))
, ~- O- O, A, f; @4 d# q (setq ang(+ delta ang))
0 C; I+ @' y2 i0 c+ c (setq pt(list (* r (cos ang)) (* r (sin ang)) (* j0 jj))) . I/ j$ \3 b' ^$ x
(command pt) ! ]9 o( b% x2 w: c" T: R8 t3 p W
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(setq p2(list 0 0 (* j0 jj))) + v# [2 j, O& b2 `$ G3 m. o( d% u
(setq g1(* j0 jj)) ;下支撑圈高度
" W4 d v) r9 i) | (setq jj 0)
# a F1 X& a7 Y6 m& n; d; U (repeat n2 ;绘制工作圈 + E R6 I8 g( s! x4 Q
(setq jj(+ jj 1)) # n; J I# j2 q8 |8 d. T% h; I0 V
(setq ang(+ delta ang)) 3 a4 i$ E4 m* Q% V9 ]: R
(setq pt(list (* r (cos ang)) (* r (sin ang)) (+ g1 (* j jj)))) & X4 P5 Q, l& N) e5 ]
(command pt) / T/ G; D; a4 r
)
# H- ~5 l# E5 E! l (setq p3(list 0 0 (* j jj)))
; g: e3 v& J Q9 `; J5 w* E (setq g2(* j jj)) ;工作圈高度 * ]# F; P+ L, G" f5 {( k
(setq jj 0) i! H' H6 r; y
(repeat n1 ;绘制上支撑圈 1 w$ i& |- `2 [* i) b9 P
(setq jj(+ jj 1)) / \6 H% O8 A2 n! O% {% ^
(setq ang(+ delta ang))
) i O9 W5 p% ~- z ~; Q (setq pt(list (* r (cos ang)) (* r (sin ang)) (+ g1 g2 (* j0 jj)))) 7 y8 x+ O4 g9 |- {3 m# @" b
(command pt) + X- v5 M# u1 W- X3 s2 Z( d& Z0 f4 Y
)
3 H+ a6 V! y/ r3 u9 p% n: { (setq g3(* j0 jj)) ;上支撑圈高度 0 A1 E3 d0 P3 n+ G$ a$ r4 h
(command "") ! b$ O$ C* F' ~- n- e/ E# J
(setq e1(entlast)) , K* v4 C* }) r$ O3 I
(command "ucs" "x" "") ;拉伸弹簧
) q9 n4 m" ]0 I# _! P9 o (command "circle" pt1 (/ d0 2))
7 {7 V- n3 H: }. x+ n6 o7 F) t c$ M (setq e2(entlast))
. D1 b+ s! j9 G. I' B, V8 Q) D (command "extrude" e2 "" "p" e1)
6 t4 `8 o8 I0 \3 v* V: F (setq e3(entlast))
; D+ x1 v- G6 d; _ (setq pt2(list r (/ d0 4) 0)) ;磨平
/ {- g( B, K' L* Y (setq py(+ g1 g2 g3 (- 0 (/ d0 4))))
+ z( G3 U7 E0 _1 L0 D2 A (setq pt3(list (- 0 r) py 0))
8 M8 ^ d% Q5 M8 N (command "slice" e3 "" "zx" pt2 pt3) 5 J/ L1 f! Z6 N* H) C3 |3 e
(command "slice" e3 "" "zx" pt3 pt2) ) w, K3 Y! S7 j* W$ t3 x
(command "ucs" "w")
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& l& O; o8 t+ z( ?5 b* N;;;---------end----------弹簧程序结束! |
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