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快速繪製3D彈簧
% u3 q4 x$ f! L2 M8 T* A將下列彈簧的程式（LISP)加載到CAD中就可以使用，很方便的！
- c; {+ I7 P; M5 s7 r;;;-----------彈簧的程式----------
) ~" } A S* y$ [( O5 C(defun c:spring(/)
8 m& q* t- i: c! [; d5 }(setq p1(getpoint "請指定螺旋線基點:"))
. P ~( r. ]2 l/ `: i7 F0 O(setq r(getreal "請輸入半徑:"))
' i& e2 i' V0 D(setq d0(getreal "請輸入彈簧絲直徑:")) % Z; K/ G+ `, Y
(setq disp(getreal "請輸入節距:")) ( @2 B$ ^: C! t0 a( g+ W
(setq n0(getint "請輸入圈數:")) # s& o. _7 h! E5 B- H
(setq n(getint "請輸入每圈細化段數(16/20/24/28/32/36/40/48/52/56/60/100):")) 0 g3 q L# b- c$ U% d) w5 a
(setq n1(* 1.25 n)) ; * E7 C9 L! i7 B
(setq n1(fix n1))
( D7 F5 b6 J Z* [9 {9 }(setq n2(* n0 n)) ;工作圈細化段數 9 C. j8 k6 |' V4 e, n
(setq delta(/ (* 2.0 pi) n)) ;單位轉角 7 _! }3 ]# m2 @& T1 G6 y
(setq j(/ disp n)) ;工作圈軸向位移量
3 A: H/ H9 j9 L0 t- x; @4 w7 o(setq j0(/ d0 n)) ;支撐圈軸向位移量
3 U6 c+ g7 @. f# b# B(setq bb(caddr p1)) - M: A) ]# c6 ?
(setq ang 0) % w$ v2 W" f+ L1 d0 r: \& M" j
(setq jj 0)
6 M# \" b7 ^5 V2 {( T m9 C+ x9 X0 G(command "ucs" "o" p1) " p+ K9 @6 [) z& l
(setq pt1(list r 0 0))
6 s3 f2 y+ D- o0 L(command "3dpoly" pt1)
' \. L( C q; {- g, f(repeat n1 ;繪製下支撐圈
. e( U% Y: Z5 H; z {1 S(setq jj(+ jj 1))
. d$ t( E/ S0 U* {- Z o7 N8 |; o(setq ang(+ delta ang))
: t" i( M) D1 \! U5 `" [( |(setq pt(list (* r (cos ang)) (* r (sin ang)) (* j0 jj)))
+ j# `( F& I$ ^. D. o# r8 K4 Y* ](command pt)
0 I! }7 g( C; h7 j8 d) 0 ~ y* `' S" P+ ?/ A0 _
(setq p2(list 0 0 (* j0 jj))) - R" b7 s2 [/ l8 s
(setq g1(* j0 jj)) ;下支撐圈高度 1 J" r# ?( [5 W& K1 z0 R
(setq jj 0)
, N4 P$ H) J' o! ?; [* E(repeat n2 ;繪製工作圈 & Q7 ]/ K, E* [( s
(setq jj(+ jj 1)) k: k+ ]2 K+ s: P/ J7 r
(setq ang(+ delta ang)) . p" y O, f' g0 X
(setq pt(list (* r (cos ang)) (* r (sin ang)) (+ g1 (* j jj)))) ' s/ Q) y2 Q0 i0 W- V3 _. @
(command pt) % Y2 D8 @/ t6 v! f5 ] I
) ' C' c% f5 _6 C/ V4 H: e! g$ S: B
(setq p3(list 0 0 (* j jj))) ; ~# k% e' e5 ] x4 k, X
(setq g2(* j jj)) ;
" y- q2 S+ {$ k. W4 |8 `8 ~(setq jj 0) ' U5 o! t2 b; E
(repeat n1 ;
0 B/ y6 d. [) Z8 ~3 i& X7 d(setq jj(+ jj 1)) 2 ^- h8 j. J# Z0 n1 ~
(setq ang(+ delta ang)) 3 k- Q2 N: {' R
(setq pt(list (* r (cos ang)) (* r (sin ang)) (+ g1 g2 (* j0 jj)))) / G' `+ o1 E* L
(command pt)
4 j, I' T8 ?# Z8 t& V# _' z% M& Y)
) P6 v6 F5 N$ t(setq g3(* j0 jj)) ;
$ ~4 G/ U! n2 }) c$ n(command "") 9 H2 f: Z! {9 Q* X6 t; v
(setq e1(entlast)) $ T; b; w+ O# i. d) T- n
(command "ucs" "x" "") ; + o1 Y: a4 i. P' G( u1 i
(command "circle" pt1 (/ d0 2)) 7 @' \. H' C9 J) o O3 u' D" P& l
(setq e2(entlast)) 4 G- Q6 J4 u+ ?5 `
(command "extrude" e2 "" "p" e1)
# N0 A& n% {+ ]# \8 x' s) y7 w' V8 X(setq e3(entlast)) 6 U+ m0 e! K; ^2 S/ j6 t
(setq pt2(list r (/ d0 4) 0)) ;
4 @) `( b! n: ]& n4 s% m(setq py(+ g1 g2 g3 (- 0 (/ d0 4)))) 4 v- ?) w( K# D) _1 H3 _
(setq pt3(list (- 0 r) py 0))
/ G' j/ @6 \5 X! U. \(command "slice" e3 "" "zx" pt2 pt3)
* H7 B3 {7 d( T5 ~$ X(command "slice" e3 "" "zx" pt3 pt2)
1 @7 z5 k" S. K0 ?" a' g& Z. m(command "ucs" "w")
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;;;---------end----------彈簧程式結束！ |
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发表于 2009-6-17 19:15
楼主
搞不懂！！！！