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快速繪製3D彈簧4 N+ l$ a1 l9 g) c; v: L
將下列彈簧的程式（LISP)加載到CAD中就可以使用，很方便的！1 t* N$ X3 B# M$ [5 L
;;;-----------彈簧的程式---------- ( L+ l% s2 t x# m; w; p3 Q6 r; L
(defun c:spring(/)
8 t* h6 }: g0 j3 X, j+ H2 `(setq p1(getpoint "請指定螺旋線基點:")) ( |( _7 f3 i! h2 J+ ]/ t; P2 z% I+ a
(setq r(getreal "請輸入半徑:")) 8 z2 a1 y/ ?$ O/ u, t2 Y( \
(setq d0(getreal "請輸入彈簧絲直徑:")) " m) H! A0 y* A# g( f5 i% k
(setq disp(getreal "請輸入節距:")) + G5 D# o/ O* \2 S9 {% X
(setq n0(getint "請輸入圈數:")) 0 G( a9 G2 m3 `
(setq n(getint "請輸入每圈細化段數(16/20/24/28/32/36/40/48/52/56/60/100):")) $ }5 S% |+ C. V' c/ L# V
(setq n1(* 1.25 n)) ;
0 x; o4 K \* e3 B9 `8 E(setq n1(fix n1)) + v9 {& Y, Y, n$ w* S9 j# h) b, ]
(setq n2(* n0 n)) ;工作圈細化段數 , Y" }6 f5 ]3 @6 M0 [8 L) f" U9 ?: p
(setq delta(/ (* 2.0 pi) n)) ;單位轉角
/ H" O+ U, }/ E4 a; g$ h4 U(setq j(/ disp n)) ;工作圈軸向位移量 $ D5 y( G3 I X/ y
(setq j0(/ d0 n)) ;支撐圈軸向位移量 . n: X; j- L: T8 x! n
(setq bb(caddr p1)) 3 C0 Y( Q2 q; W8 H0 r5 Y7 b
(setq ang 0)
( p, H+ G" J- r" |; S4 g5 U) K(setq jj 0)
5 a7 n* |+ D/ I# t% y+ L(command "ucs" "o" p1)
8 f# [" ?1 ~/ L(setq pt1(list r 0 0)) j, v) Y ^( h
(command "3dpoly" pt1) 6 l6 q( A1 X! }; y% u7 e
(repeat n1 ;繪製下支撐圈
2 O& n& E3 H# ^% L4 J9 N, D(setq jj(+ jj 1))
: t* a1 w8 p! @1 B2 D(setq ang(+ delta ang))
; ~+ {* ?/ K5 S0 u# p- z(setq pt(list (* r (cos ang)) (* r (sin ang)) (* j0 jj)))
, h, P% ^4 r( @9 r; n5 l(command pt) . K0 g% A, K! H# k) t4 {
)
) W9 x* _! W& D( P( y4 H/ O(setq p2(list 0 0 (* j0 jj)))
! f7 M4 T- }: ^& t% _1 q% _9 P/ d& @(setq g1(* j0 jj)) ;下支撐圈高度
2 r( I4 Q5 b6 K3 o5 d4 A3 H" v L(setq jj 0)
L" t1 ^5 C. ]& F; B8 @(repeat n2 ;繪製工作圈 8 A, m# N5 e0 Q' M7 D
(setq jj(+ jj 1))
1 f6 E0 E' c1 i" t" j& y: _(setq ang(+ delta ang))
5 t9 ~& z9 m/ S2 S% s0 B(setq pt(list (* r (cos ang)) (* r (sin ang)) (+ g1 (* j jj)))) : T% K' m" z. S2 {8 i5 E% w
(command pt) # M6 F8 Q) l4 h5 v6 b8 a! u9 b
)
# @' O' p$ M8 r* O0 m(setq p3(list 0 0 (* j jj)))
' s! F. x) y( P7 T7 Q(setq g2(* j jj)) ;
$ V5 ^) F& n. f2 n' j2 B% V$ y- ](setq jj 0) 7 D# @' e& s; S; ^, e$ d
(repeat n1 ; 7 n2 G: E; O/ D( X5 x+ |8 S
(setq jj(+ jj 1))
4 z9 L+ {) O2 @% Z(setq ang(+ delta ang))
! H& g. E1 W+ |( z3 |(setq pt(list (* r (cos ang)) (* r (sin ang)) (+ g1 g2 (* j0 jj)))) ; Z5 f. h# c& C% r
(command pt) 8 f$ C9 T! c& z, X9 i$ [" \, |3 p
)
! ?3 J) R; H9 Y7 r( W# @(setq g3(* j0 jj)) ;4 X, H- L. u5 E/ K1 f
(command "") ; b# A9 V1 j+ S) g: L; T9 d
(setq e1(entlast)) : B$ _* [0 A/ {( m" S0 a, _4 b. o
(command "ucs" "x" "") ; . i, B4 I+ u6 }5 l
(command "circle" pt1 (/ d0 2))
k0 ]/ @7 h, b) q- p1 r(setq e2(entlast))
* c2 K" F; e$ n- b(command "extrude" e2 "" "p" e1) / o3 ? }/ R( F! @2 ~
(setq e3(entlast)) ( z- l- C2 |6 e0 k$ D
(setq pt2(list r (/ d0 4) 0)) ; ' \& k3 u- K& c6 S) W9 M) E
(setq py(+ g1 g2 g3 (- 0 (/ d0 4)))) 0 u- e9 h* K( `: q7 X4 ?$ ~( P
(setq pt3(list (- 0 r) py 0))
8 \6 r7 {$ r. I8 o: ^(command "slice" e3 "" "zx" pt2 pt3) 4 R- h; r8 e4 e! d+ c7 h: Z/ M
(command "slice" e3 "" "zx" pt3 pt2)
# |: z, S. v' M5 f3 W$ a) X(command "ucs" "w") 7 P- |+ \5 v- ]- B* {1 Q6 p
- W- d8 S5 |" s- L* B) g/ W9 f)
5 F+ c, s/ n$ L2 p;;;---------end----------彈簧程式結束！ |
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发表于 2009-6-17 19:15
楼主
搞不懂！！！！