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快速繪製3D彈簧
6 g+ K" ~! H" q& v$ J+ N, ^將下列彈簧的程式（LISP)加載到CAD中就可以使用，很方便的！( m1 T- n% \4 s5 W- Y8 m% f
;;;-----------彈簧的程式----------
: I; o \% {8 e& h% c* U, W(defun c:spring(/)
2 E& u( l* e1 h# `( X2 z(setq p1(getpoint "請指定螺旋線基點:"))
, `1 k: m0 j9 d; B; {( f* C7 L(setq r(getreal "請輸入半徑:")) 1 X! ?+ A) L, I5 j
(setq d0(getreal "請輸入彈簧絲直徑:"))
! z8 i# p; m$ f& N9 R) h5 G(setq disp(getreal "請輸入節距:")) ' m- s- G. I2 f
(setq n0(getint "請輸入圈數:"))
c+ a9 x: U" U9 Z8 M(setq n(getint "請輸入每圈細化段數(16/20/24/28/32/36/40/48/52/56/60/100):"))
: l$ u( l) [ ^/ a: n(setq n1(* 1.25 n)) ; / S0 C7 ?1 R- K
(setq n1(fix n1)) ) L9 P9 C2 h7 r7 ^3 W' o3 J
(setq n2(* n0 n)) ;工作圈細化段數
$ o- H: @! `0 f5 C. b6 G7 E# K" s4 b(setq delta(/ (* 2.0 pi) n)) ;單位轉角 6 y- j* I! r7 E e4 v, N: Y
(setq j(/ disp n)) ;工作圈軸向位移量 , |, \8 e$ @; s$ V% [+ Z# U
(setq j0(/ d0 n)) ;支撐圈軸向位移量
5 s5 {$ K4 Y' H+ b(setq bb(caddr p1)) : T, U w/ {8 Q0 k8 u
(setq ang 0) ' o6 a0 g% h. O' h! I3 s
(setq jj 0)
3 v# ?+ {# w4 l) Y% ~(command "ucs" "o" p1)
. B9 W) A6 a* B2 q- S(setq pt1(list r 0 0))
$ L; r5 {; B+ Q" D9 [5 n(command "3dpoly" pt1)
) i6 }% i* W4 ]! D. T0 @0 q(repeat n1 ;繪製下支撐圈
* K9 _4 {0 U% }2 b9 ]) _0 z/ H$ ?6 w(setq jj(+ jj 1)) ( l! J0 g) p0 O5 F
(setq ang(+ delta ang)) & Y* U3 R6 i! ^" C" C
(setq pt(list (* r (cos ang)) (* r (sin ang)) (* j0 jj))) 5 w. ^. j/ y: K/ L# R; F; P9 K6 c: _
(command pt) $ O; u1 v4 X6 M/ Y
)
% ?5 h$ m* T. {9 f0 I(setq p2(list 0 0 (* j0 jj))) & w2 [; s7 c* F0 Y$ b7 V/ W
(setq g1(* j0 jj)) ;下支撐圈高度 5 c5 u4 x6 T0 }7 ?5 j
(setq jj 0) ! t1 ]! o9 }9 P; a/ O* {
(repeat n2 ;繪製工作圈 + n$ H( e. c. i% D
(setq jj(+ jj 1)) - @8 k7 u8 p0 k' [
(setq ang(+ delta ang))
3 A- M" U2 d( T. A- R, C(setq pt(list (* r (cos ang)) (* r (sin ang)) (+ g1 (* j jj)))) 5 I# a$ j$ T+ _. t
(command pt) 6 Z/ G# U' E$ t8 o4 B
)
' c5 u( D7 ^9 e7 O1 f3 d3 x9 c" b5 X(setq p3(list 0 0 (* j jj))) 1 N+ \8 K7 c/ t3 i5 N# L! \. V
(setq g2(* j jj)) ;
3 {+ h1 w, c& n2 ^+ l(setq jj 0) * D) G7 e" N9 s* h
(repeat n1 ; / Q R! F) e" ?
(setq jj(+ jj 1))
8 I7 e9 @0 h* f' i1 Z! q2 q5 ~(setq ang(+ delta ang)) 4 a6 I; m v0 P* @' l( c4 v
(setq pt(list (* r (cos ang)) (* r (sin ang)) (+ g1 g2 (* j0 jj))))
" n/ B K6 e- |# I1 S(command pt)
& @, e1 Q$ C& D+ r9 L% C6 \) * X2 J2 |; }% x7 s2 F/ Q6 r
(setq g3(* j0 jj)) ;
, a( r# Y; w1 @4 x }(command "")
N6 r3 @ [3 o* u/ A3 L, w(setq e1(entlast))
+ ]2 D4 W& Q3 B D) ~(command "ucs" "x" "") ;
) X' k' }& R; m(command "circle" pt1 (/ d0 2))
' R! _) {( r8 b) G% S(setq e2(entlast))
3 c6 m+ n$ U9 J4 j+ X(command "extrude" e2 "" "p" e1) ' w( @& M$ Z7 r/ y& A. {
(setq e3(entlast))
7 f' n6 E& f3 F; B(setq pt2(list r (/ d0 4) 0)) ; + S8 m, y; e8 a% \
(setq py(+ g1 g2 g3 (- 0 (/ d0 4))))
+ ]# T0 Z( w# |6 ~. f s0 X1 J(setq pt3(list (- 0 r) py 0)) $ S3 {( k U" ^/ l6 x& j
(command "slice" e3 "" "zx" pt2 pt3)
( ]: n' u" L% [0 x(command "slice" e3 "" "zx" pt3 pt2)
. y# ]2 m3 p2 s$ A(command "ucs" "w") 9 K9 M% J e/ K; r' S" H2 ^, j, m
* W# D& l0 y, }3 Q$ N1 v, R
) 5 [9 n- |5 ~: l 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！！！！