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快速繪製3D彈簧$ O% a; g$ n4 @' I" T2 |: ^
將下列彈簧的程式（LISP)加載到CAD中就可以使用，很方便的！6 L1 b3 W. {3 y0 y5 P, J% ~5 G
;;;-----------彈簧的程式---------- $ `/ ]6 ^6 D, D+ y5 w
(defun c:spring(/) . [/ y/ s! A6 g; F# E
(setq p1(getpoint "請指定螺旋線基點:")) ! e' Y. }/ D( `8 E7 m$ L# M
(setq r(getreal "請輸入半徑:"))
1 E2 G M& M8 K: b(setq d0(getreal "請輸入彈簧絲直徑:")) % F0 Q9 l5 Q x, T
(setq disp(getreal "請輸入節距:"))
3 c$ R3 P9 h0 j(setq n0(getint "請輸入圈數:"))
% Q1 x- _9 {, D- J(setq n(getint "請輸入每圈細化段數(16/20/24/28/32/36/40/48/52/56/60/100):"))
7 _& X" X. G3 p: p8 f(setq n1(* 1.25 n)) ; " X: x8 B6 E7 m5 e l2 d
(setq n1(fix n1))
" P! t5 s* H2 P! n: }(setq n2(* n0 n)) ;工作圈細化段數
% ]% W2 Z# Y$ B- I/ E5 k4 J z: d(setq delta(/ (* 2.0 pi) n)) ;單位轉角
! a' }5 S {. X8 a- K( c$ ~(setq j(/ disp n)) ;工作圈軸向位移量 ! ^4 y# u. ]4 H9 U' r
(setq j0(/ d0 n)) ;支撐圈軸向位移量
# v3 i/ J8 s; _; J/ @& A( v: @(setq bb(caddr p1)) $ U5 c* ~* a) V) [- ?/ q( `. a
(setq ang 0) . B$ T; @' |' R( g! B
(setq jj 0) e# {% e4 D4 y; }
(command "ucs" "o" p1)
( h! D, _! a( ~: c(setq pt1(list r 0 0))
$ r8 l8 L: J( h7 I(command "3dpoly" pt1)
4 j9 D( M: p( e) Z; F& ~3 c5 [" p0 u(repeat n1 ;繪製下支撐圈 1 H) D5 c& a4 ?* s0 V9 y
(setq jj(+ jj 1)) 3 R0 `+ U% ]5 J" x) S& ~! {
(setq ang(+ delta ang)) 8 E" |3 X& O( ^# f5 a
(setq pt(list (* r (cos ang)) (* r (sin ang)) (* j0 jj))) 0 c7 M. S+ ?7 T4 e* J& _, b
(command pt)
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* b' @# l5 |7 g: \# {; D& X; U(setq p2(list 0 0 (* j0 jj))) * g, y! }) C' c9 K; T+ r
(setq g1(* j0 jj)) ;下支撐圈高度 7 m8 d2 F( |* W3 d
(setq jj 0) # f7 m' T2 P! z9 `& u' v
(repeat n2 ;繪製工作圈
3 w; _' l) j1 Q+ d y; F& @(setq jj(+ jj 1))
8 @! X0 {( E% ^' d4 _8 ?7 [/ q(setq ang(+ delta ang)) 9 G* E4 N9 _4 x, p! e) ]
(setq pt(list (* r (cos ang)) (* r (sin ang)) (+ g1 (* j jj)))) . V( V' m) w$ d# i6 a3 i" G+ b
(command pt) ) m0 ?; g. `# g8 [. d
)
/ r/ ^9 M4 w' F' t& X(setq p3(list 0 0 (* j jj))) ! ^' N$ M. N0 R( F$ n6 R
(setq g2(* j jj)) ;6 J- h& D8 V" _, @
(setq jj 0)
' U& k+ K! ?6 A) e(repeat n1 ; ; ^+ N5 s/ l& F/ c |4 F
(setq jj(+ jj 1))
! O' U. u) M: ^- I+ d, E+ K(setq ang(+ delta ang)) 2 h; \( g4 z% j' d' \& t
(setq pt(list (* r (cos ang)) (* r (sin ang)) (+ g1 g2 (* j0 jj))))
1 s0 U! d F! H(command pt)
* r+ F0 e/ D# ?( U) ; r0 }+ k, |0 H4 C& t5 o7 e
(setq g3(* j0 jj)) ;+ b7 B* z, Y% C6 h- R
(command "")
' n; C* N: i# p) P% O% m(setq e1(entlast))
3 ]" ~/ w- A4 k+ B- K(command "ucs" "x" "") ;
* s' T4 ^; J# r+ b$ ^' \4 f( D(command "circle" pt1 (/ d0 2))
( n( _; @6 D* h+ K5 i! C(setq e2(entlast)) . n4 P# d x; A' S x
(command "extrude" e2 "" "p" e1)
- b# X/ a' U* U) u* n5 [9 H. t- l1 _(setq e3(entlast)) ( G' p+ Y4 {+ n+ P$ v* I8 g
(setq pt2(list r (/ d0 4) 0)) ; 3 S& k3 C* a$ f% ]6 O- X3 Z6 ~
(setq py(+ g1 g2 g3 (- 0 (/ d0 4)))) . J0 l; m1 x1 Y7 d0 N8 d( f
(setq pt3(list (- 0 r) py 0))
2 _- i E1 {3 _* Y& Q(command "slice" e3 "" "zx" pt2 pt3) / L1 D, n/ V. W
(command "slice" e3 "" "zx" pt3 pt2) 1 R7 n6 G0 B% v, g/ W, J* `
(command "ucs" "w")
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)
+ \. Z7 C1 Z( G* O# L9 @4 ~;;;---------end----------彈簧程式結束！ |
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发表于 2009-6-17 19:15
楼主
搞不懂！！！！