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大家试一试用下面的程序
c9 z# F! i; l; N) k 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! $ e$ b9 K/ ]. V! `
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1 ~5 ]& @0 N5 G( s# a+ V2 P A;;;-----------弹簧的程序---------- ' A7 F' i" l. t) z* U8 X; R- c! u
(defun c:spring(/) - G8 X6 D* ^' n! Y% Y) g0 x0 y" W! Z
(setq p1(getpoint "请指定螺旋线基点:")) & k* Q+ N0 j# `0 b. r
(setq r(getreal "请输入弹簧平均半径:")) 2 F6 Q5 a" u- g: t) D( `4 _$ A! I3 D
(setq d0(getreal "请输入弹簧丝直径:"))
8 a5 [1 |0 u( X, V (setq disp(getreal "请输入弹簧节距:"))
4 j) [# B4 C& T) R- W: \: w6 C7 [5 X (setq n0(getint "请输入弹簧工作圈数:")) & g) Y9 z8 }: G7 n: s
(setq n(getint "请输入每圈细化段数(16/20/24/28/32/36/40/48/52/56/60/100):"))
. r4 x9 M1 `0 S7 }8 Z$ k (setq n1(* 1.25 n)) ;支撑圈细化段数
" y8 ?# D" G9 I! J8 Q2 {8 ^ (setq n1(fix n1)) 5 N! m+ g J0 @
(setq n2(* n0 n)) ;工作圈细化段数 / H6 g7 Y: [: D; E$ D
(setq delta(/ (* 2.0 pi) n)) ;单位转角 3 _' S( X! Y& ?( [: @9 d
(setq j(/ disp n)) ;工作圈轴向位移量
, B$ D$ j5 s6 ?7 ~ (setq j0(/ d0 n)) ;支撑圈轴向位移量
$ ~5 a6 n) t! c% u" C! q (setq bb(caddr p1))
) g$ P0 N4 p/ C: B7 ^& @0 A7 D (setq ang 0)
/ F, }# c( w8 n( y (setq jj 0)
9 H& Q5 A& E$ T (command "ucs" "o" p1)
1 c) F+ S/ o! g7 h% K (setq pt1(list r 0 0))
; c* P3 x. X9 s' ^ (command "3dpoly" pt1) 0 T O2 y; f7 w. v% O
(repeat n1 ;绘制下支撑圈
4 x3 B+ P1 M: Y' I- l# ? (setq jj(+ jj 1))
' E) j6 n9 T+ Q% ~# T! O" h (setq ang(+ delta ang))
2 [; i$ w& L6 j2 V; u W- l$ F. Y: S (setq pt(list (* r (cos ang)) (* r (sin ang)) (* j0 jj))) # b3 }+ ]% I" Q" u
(command pt) 4 `% J9 R& Y M& B$ y8 y- r' Y
)
* N0 a* s- {, S; } (setq p2(list 0 0 (* j0 jj)))
$ r! b2 M. F: |. M2 j& `0 w (setq g1(* j0 jj)) ;下支撑圈高度 + I7 I+ ^% H/ T$ u2 E" t: V
(setq jj 0) L9 ]4 t3 d4 z/ _. Q
(repeat n2 ;绘制工作圈 ! H9 a) ~0 {) ? A: q% `* ^
(setq jj(+ jj 1))
0 L1 U+ F2 N O0 h K" f (setq ang(+ delta ang))
+ K. N M9 b# X4 f9 V, n (setq pt(list (* r (cos ang)) (* r (sin ang)) (+ g1 (* j jj))))
# N9 T# ^& o8 p" |' x+ k, x (command pt) " l: p+ S% e7 y" Q" o0 g; c5 B
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(setq p3(list 0 0 (* j jj)))
4 T, W; B8 `# F# P/ b, x (setq g2(* j jj)) ;工作圈高度
+ j! w; U! [* s (setq jj 0)
& B( z7 b, l ?: g (repeat n1 ;绘制上支撑圈 / W/ I6 L" {/ P. q; U' `
(setq jj(+ jj 1)) 7 J: m: W% x6 R' @! |8 i
(setq ang(+ delta ang)) , b X- A% K1 ?' |% ^
(setq pt(list (* r (cos ang)) (* r (sin ang)) (+ g1 g2 (* j0 jj)))) / F6 ]9 E1 `& H$ s
(command pt)
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j( t# l* {% y5 {" O# @ (setq g3(* j0 jj)) ;上支撑圈高度 # |, Q' I5 }; _9 |3 P' J: y! T. n3 P! H
(command "") / G0 w e# D9 Y* r
(setq e1(entlast))
* q) U5 v3 G$ ]+ K) I" G$ \- n (command "ucs" "x" "") ;拉伸弹簧 + |; \9 c6 Y# d/ w* \" C Z* r5 d
(command "circle" pt1 (/ d0 2)) 9 u! b, \ i6 Q2 q! ` H
(setq e2(entlast))
/ Q3 r( R, i; r/ T8 l (command "extrude" e2 "" "p" e1)
5 g t7 J) H/ k! N (setq e3(entlast)) . `% T6 t+ ]% ?' r, ~0 m
(setq pt2(list r (/ d0 4) 0)) ;磨平
" c% ]0 G5 G+ Q3 e3 j! g, k e5 P (setq py(+ g1 g2 g3 (- 0 (/ d0 4)))) / z) w7 w' z3 S7 T
(setq pt3(list (- 0 r) py 0))
! K/ R0 h7 f+ c: l: N2 |% m (command "slice" e3 "" "zx" pt2 pt3)
# c% E5 l- h; U) b) s% | (command "slice" e3 "" "zx" pt3 pt2)
1 e: h; C. a; f" g7 K (command "ucs" "w") 6 a3 V R1 m4 o+ O% a
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;;;---------end----------弹簧程序结束! |
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