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快速繪製3D彈簧' f7 I" d1 M) g% g# M# ]
將下列彈簧的程式（LISP)加載到CAD中就可以使用，很方便的！" k6 Y+ v: O0 m5 ]
;;;-----------彈簧的程式---------- & O8 ~4 W: Q& I- B; E5 V% u* N
(defun c:spring(/) 2 A5 T, b4 u' ]' s3 s% X
(setq p1(getpoint "請指定螺旋線基點:")) 8 O1 h: B' W: ?; t; E8 x( j
(setq r(getreal "請輸入半徑:"))
4 Y' @8 C3 ? T- v9 G, {- ~(setq d0(getreal "請輸入彈簧絲直徑:"))
) C( r' Y: k( _3 R% r p' C(setq disp(getreal "請輸入節距:")) " k% ?+ |0 D& p
(setq n0(getint "請輸入圈數:"))
! Y! g) w: }3 c$ `# D" O(setq n(getint "請輸入每圈細化段數(16/20/24/28/32/36/40/48/52/56/60/100):"))
" T9 j$ r; A( d, }) l(setq n1(* 1.25 n)) ;
+ k1 W" Q# Z8 m; p: I(setq n1(fix n1)) ' a4 e# K+ D3 Q, |8 B5 {+ m
(setq n2(* n0 n)) ;工作圈細化段數 + `; s% i( {& N$ `# O
(setq delta(/ (* 2.0 pi) n)) ;單位轉角
- `% D+ x1 U$ H(setq j(/ disp n)) ;工作圈軸向位移量
+ u7 l% ~$ e |/ O2 n8 P(setq j0(/ d0 n)) ;支撐圈軸向位移量
) S% A1 R% H! q(setq bb(caddr p1)) + P4 ~' K) t8 a
(setq ang 0) $ q) ]) Y9 K. D5 I+ r
(setq jj 0)
% l7 c/ y9 m5 C8 B9 `3 g(command "ucs" "o" p1) # D( H( T7 t/ l7 a) L, A
(setq pt1(list r 0 0)) * F, I `/ o4 E/ K) K5 p2 Q
(command "3dpoly" pt1)
5 R* w5 A0 A/ h2 }8 w(repeat n1 ;繪製下支撐圈
6 B9 o# l* a# @% ]% O5 O7 X$ B(setq jj(+ jj 1))
) ^3 P5 v9 L0 C* j% m(setq ang(+ delta ang)) ! f4 l# f' F' j) _" v x
(setq pt(list (* r (cos ang)) (* r (sin ang)) (* j0 jj)))
' M& k. Q( }0 `: u4 @(command pt)
( k J3 z/ T' v7 X& K5 v3 C& J) % z. g4 O# n: L, u: x# P2 ^
(setq p2(list 0 0 (* j0 jj)))
% Y h7 s7 k3 |8 L, Z. u(setq g1(* j0 jj)) ;下支撐圈高度
% n7 k' ]- Y( y6 |: e* e(setq jj 0) - j+ j0 }2 V8 x0 R/ X$ {" C
(repeat n2 ;繪製工作圈 3 S: M% F6 Q N. z" B
(setq jj(+ jj 1)) * v' Z; s* I9 X8 Y' F
(setq ang(+ delta ang)) # i* Q8 m+ w. m/ k( V/ `3 p7 @! t
(setq pt(list (* r (cos ang)) (* r (sin ang)) (+ g1 (* j jj)))) ; t- I0 a% ]9 s' q8 s
(command pt)
) n' V- ?' n# }) W)
: H- A2 s; L/ R& F0 @8 B; ]' E(setq p3(list 0 0 (* j jj))) ) H1 J1 D: A+ y. P" B1 w+ V, _! x! A
(setq g2(* j jj)) ;0 C2 O( V8 M/ f
(setq jj 0)
7 d) v2 z2 B J/ Y n(repeat n1 ;
1 R! L' J6 K/ e* E6 O) s' D. v( V(setq jj(+ jj 1))
, Q* l9 m% w4 r, J" C! P* c(setq ang(+ delta ang))
# }, i, X/ F* D7 I! G(setq pt(list (* r (cos ang)) (* r (sin ang)) (+ g1 g2 (* j0 jj)))) / F9 L8 ~& @9 {" ]. v* m& g* H
(command pt)
) C) r8 F& k" h: H8 s)
5 t+ h' E, b+ P7 `(setq g3(* j0 jj)) ;
. a4 v% z5 j0 R8 n$ U(command "")
. y+ k" |& g. H) ^+ X6 E- ]8 l(setq e1(entlast)) 2 V% J$ Y$ j( @. b8 Q e+ i. K
(command "ucs" "x" "") ;
' k4 p, {; _" _: L(command "circle" pt1 (/ d0 2)) $ T7 @; R v3 ?! \
(setq e2(entlast))
1 |) g) U3 _# q e7 z! g* b: ](command "extrude" e2 "" "p" e1)
b% v- `( G$ w(setq e3(entlast)) ! Q" t, i6 \4 O1 ^
(setq pt2(list r (/ d0 4) 0)) ;
, Y+ C; j1 t! e/ ^; x% u(setq py(+ g1 g2 g3 (- 0 (/ d0 4)))) & `' J% t0 N2 p. j& B, o# z9 s' B
(setq pt3(list (- 0 r) py 0)) " ~/ i {7 X: Q2 d% U
(command "slice" e3 "" "zx" pt2 pt3)
% @, X2 g: M M$ H7 S( Z(command "slice" e3 "" "zx" pt3 pt2)
/ o w+ L3 U7 Q- f(command "ucs" "w") , u" g, A8 ^0 y1 s4 Y
8 @; \2 c: D& R9 b8 T8 B
)
/ ~; N. i y; i& B6 [8 `. a;;;---------end----------彈簧程式結束！ |
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发表于 2009-6-17 19:15
楼主
搞不懂！！！！