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下面是我已经有了的画弹簧的程序，可是怎么才能让它可以画出扭转弹簧的三维程序呢，请高手指点，非常感谢！！！3 m: p! ]% I: Z# W O
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(defun C:spring(); ]1 e, o! b0 |& b P6 {
(setq bp (getpoint "\n 弹簧中心点"))
2 N1 Z9 Q* O( { (setq dw (getreal "\n 弹簧直径="))$ T- M1 Y9 A% m; |6 H$ A' x q9 x
(setq d (getreal "\n 弹簧丝径="))5 ? L7 O1 X: X) P! Q
(setq pitch (getreal "\n 弹簧节距="))
) H, [$ d4 q0 |0 U (setq len (getreal "\n 弹簧长度＝"))
1 O1 n7 g* \1 Y. Y5 D8 G (setq n (getint "\n 段数="))
* \9 j4 q) y8 K; }& j (setq r (/(- dw d)2))8 `" E* O8 p) U; \- S$ l
(setq d1 (- d (* 1.0825 pitch)))
- N& `* e! v) @3 \) k" H' o! b4 F (setq r1 (/ d1 2))9 u) n3 O& Y: W+ m: K) E, J
(setq m1 (fix (* n 1.25)))
8 U% D, s& a4 W, j m; W (setq m0 (fix (*n (/ (- len (* d 2)) pitch)))): ~. W% X) p2 Q. n4 F! m
(setq delta (/(* 2.0 pi)n))
; b% h2 |5 Z( N. M (setq j0 (/ pitch n ))
6 {, i6 [5 X* B) j, V, z (setq j1 (/ d n ))
8 W, {! ?2 @, M. R* X/ } (setq bz (caddr bp ))% F) F% V, T: _- V& H
(setq ang 0)
/ y7 k* L% J* U3 C& f {4 { (setq jj 0 )
/ e' ~& u1 w+ n: Q. a3 I1 i (command "UCS" "o" bp ); V; F* Z# \' h3 P: w- }3 F
(command "3dpoly" (list r 0 0 ))
% M- `4 i8 z [3 M. c U8 [" p (repeat m1
: l, f* M$ Z# r7 \& L% @% F+ l (setq jj (+ jj 1))# f1 W4 P' A8 g- \, I
(setq ang (+ delta ang )): w4 X+ ?. R& I' j: `
(setq pt1 (list (* r (cos ang ))(* r (sin ang ))(+ bz (* j1 jj))))
0 x" O# H: q- u4 @3 R (command pt1)
- w; n* ~, [% r: j )
9 e$ l& m8 L& b4 o [2 g (setq bz (caddr pt1))
$ a' J; i9 {: K0 @) W (setq jj 0)
" l/ ]- k! h- w9 X; I6 h (repeat m05 f0 Q% y- x! a; {3 E. k! l
(setq jj (+ jj 1))( W1 V4 ], X. G) o- @ V- [# l, M
(setq ang (+ delta ang )): I* p8 }+ e+ _% l! ~7 d
(setq pt0 (list (* r (cos ang ))(* r (sin ang ))(+ bz (* j0 jj))))
4 B% l9 Z) O7 Z! g8 C (command pt0)
0 \+ u- I6 A9 ]* R7 @ )
! S9 o1 \6 ?9 ~4 e! [9 v (setq bz (caddr pt0))& k, z+ G9 J8 r' z
(setq jj 0)) q: B8 s# ?+ N, I H: Q
(repeat m1
. N0 r- o) N5 q) v: p; e (setq jj (+ jj 1)); g3 E8 W* I0 I( `1 q# H
(setq ang (+ delta ang ))
4 h1 |4 n# }6 {' {* j* A+ y (setq pt2 (list (* r (cos ang ))(* r (sin ang ))(+ bz (* j1 jj))))
0 a4 U5 G4 v5 n' ?0 n (command pt2)
, @0 @* s! G" f J) @$ O )
; b- g" x% ^8 j (command "")1 R& C/ f$ Z9 S) _+ Q8 c1 j$ s
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发表于 2009-2-19 19:57:15
楼主