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快速繪製3D彈簧
3 ?; v% `3 k( F) D z/ t將下列彈簧的程式（LISP)加載到CAD中就可以使用，很方便的！+ u" H, m1 D$ k$ e# H, I$ t; u4 \
;;;-----------彈簧的程式----------
; V, m: y8 J( j1 m/ G3 m8 a(defun c:spring(/)
1 \* h/ M) @& K, h; o8 {+ V(setq p1(getpoint "請指定螺旋線基點:"))
/ Z3 i5 H) G/ u(setq r(getreal "請輸入半徑:")) 1 p+ B5 i& a' w* r
(setq d0(getreal "請輸入彈簧絲直徑:")) 9 ~9 L0 p0 c. q% o" d; b. f
(setq disp(getreal "請輸入節距:")) 9 B9 g' p* O* A& H
(setq n0(getint "請輸入圈數:"))
* ^ N8 d4 ^* E+ _, V3 z(setq n(getint "請輸入每圈細化段數(16/20/24/28/32/36/40/48/52/56/60/100):"))
4 R% [$ x9 I1 g5 Q) D(setq n1(* 1.25 n)) ;
0 O( ~0 ^- F* O' \(setq n1(fix n1)) ! w7 W0 G( N. E! K* E
(setq n2(* n0 n)) ;工作圈細化段數 1 X( ?% U, G* [
(setq delta(/ (* 2.0 pi) n)) ;單位轉角
+ u$ k8 l$ p# X; S/ q(setq j(/ disp n)) ;工作圈軸向位移量 & c: l% n9 m$ M( k3 M
(setq j0(/ d0 n)) ;支撐圈軸向位移量
6 j! ]' o, Q( N(setq bb(caddr p1)) - D; x _: g" U& U
(setq ang 0)
" }8 @3 J' [/ \7 x4 j1 y+ V% D(setq jj 0)
( Z f- h( k( K3 t( ^ x* o: \) E+ U(command "ucs" "o" p1)
3 L% R) W- N. p2 p3 \(setq pt1(list r 0 0))
o+ b! L# y* f( n/ ~- [% S(command "3dpoly" pt1) 8 G5 c( ?1 u- Y3 l9 B9 Q: n( H
(repeat n1 ;繪製下支撐圈
1 a+ q N- J& U- ^& e6 d(setq jj(+ jj 1)) S5 W) R- V4 f
(setq ang(+ delta ang)) # t+ j! |, ^( e& X2 B5 d
(setq pt(list (* r (cos ang)) (* r (sin ang)) (* j0 jj)))
$ D2 f; t' h# P8 I6 A m2 F(command pt) + y$ s% Z7 R6 l4 k' B5 z& E
) " _" \: W( N- K+ u& `9 [+ n
(setq p2(list 0 0 (* j0 jj))) 4 X2 ]2 H# T9 z+ q$ W( b7 l3 Y: r
(setq g1(* j0 jj)) ;下支撐圈高度 0 g8 d7 T4 B0 i5 c
(setq jj 0)
. B4 ]# t6 M, X- o# [! F7 O# ^(repeat n2 ;繪製工作圈 8 ]. g6 Z; C9 b. e, g r
(setq jj(+ jj 1)) 3 @! P% a9 {* Z5 c7 ^- k, m/ M
(setq ang(+ delta ang))
' X. q- ~4 a% H: \% i. _5 ?! {(setq pt(list (* r (cos ang)) (* r (sin ang)) (+ g1 (* j jj)))) * y, Y: _3 Z. v; X' E0 Q" c
(command pt) 6 ?7 ]3 {1 W- V1 e
) 3 k! H# ^7 f/ x6 q9 M) h
(setq p3(list 0 0 (* j jj)))
+ f6 e% f- Z+ m" `9 Z, Q# o& m+ l(setq g2(* j jj)) ;2 S# M4 s1 U C7 a7 G& F, _% Q
(setq jj 0) ' S( q2 _7 a9 j( I4 e' D3 B* {
(repeat n1 ;
m) W; s# P0 p' y! u- g- c(setq jj(+ jj 1))
5 g3 R4 P7 h/ l: @5 |(setq ang(+ delta ang))
1 p+ z3 e9 c: v- x. f4 {(setq pt(list (* r (cos ang)) (* r (sin ang)) (+ g1 g2 (* j0 jj))))
4 k7 W7 k5 @& k g- `(command pt)
1 q' V4 U4 `( I)
2 X. r' f, Y5 C2 ~, c(setq g3(* j0 jj)) ;
3 ?5 Z4 o1 V4 @. B) n+ L, b3 r(command "")
0 t$ f* R+ N# c& ]: D( A(setq e1(entlast))
( c5 O3 o* U* k, s! `(command "ucs" "x" "") ; ( X, n3 C) T6 ~
(command "circle" pt1 (/ d0 2)) 2 a1 ^# U% l' q! P2 g: u8 O# O! h+ h
(setq e2(entlast))
; ~* D) g. d/ I1 z: l2 U) y(command "extrude" e2 "" "p" e1) 1 g! V0 m+ N! v
(setq e3(entlast)) k% `7 a* N* `( U9 E3 G! h6 b* y
(setq pt2(list r (/ d0 4) 0)) ;
1 L# X w( g1 D! u(setq py(+ g1 g2 g3 (- 0 (/ d0 4))))
* a T( l5 ` B$ b(setq pt3(list (- 0 r) py 0)) * z/ f( S9 ~( ]& L9 z
(command "slice" e3 "" "zx" pt2 pt3)
. b! b+ z; R. ^8 H9 k* f(command "slice" e3 "" "zx" pt3 pt2) ; E6 x9 P) Q& R7 R4 e; l
(command "ucs" "w")
7 v+ }! G; K# z, n+ g
, R7 ]6 M5 m8 Z)
f4 ]# S) {+ Q! J. m# m, ~0 };;;---------end----------彈簧程式結束！ |
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发表于 2009-6-17 19:15
楼主
搞不懂！！！！