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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！！！$ r5 ?8 f+ O, |1 p% U4 w! k& g( w, D
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(defun C:spring()7 N. O/ f7 ?( w& _. E* G, W l* \
(setq bp (getpoint "\n 弹簧中心点"))
' ?* I* l; y2 k! m g" \ (setq dw (getreal "\n 弹簧直径="))0 Z+ E8 g2 f2 m: C$ c
(setq d (getreal "\n 弹簧丝径="))" g) o( d8 L* q8 O5 u# K1 x
(setq pitch (getreal "\n 弹簧节距="))6 D# [9 A( [2 \
(setq len (getreal "\n 弹簧长度＝"))
8 k1 C% ?* i, U" ^9 ]+ j, C (setq n (getint "\n 段数="))% ^3 T/ H- r) _, k- U E
(setq r (/(- dw d)2))
3 [) u7 x; D/ D (setq d1 (- d (* 1.0825 pitch)))
% ~5 B/ h% r) B" n% |" m (setq r1 (/ d1 2))
3 h5 A5 b( b4 @7 ? (setq m1 (fix (* n 1.25)))" [8 {$ J6 s8 \; i, ]# Z _. x' a
(setq m0 (fix (*n (/ (- len (* d 2)) pitch))))
A' p9 {3 b) X: g (setq delta (/(* 2.0 pi)n))# y* d7 y3 b$ n* Q6 f
(setq j0 (/ pitch n ))
. l- s8 g/ N. N7 U (setq j1 (/ d n ))6 m+ i2 v r7 y
(setq bz (caddr bp ))
% S) F4 L3 O2 I, w( o# P (setq ang 0)3 h5 U& R( E) M9 j3 F2 z! E7 L
(setq jj 0 )/ l+ Z; H( d, u v6 @- X) h# H
(command "UCS" "o" bp )% `$ X: }. B4 C$ ^/ D: h
(command "3dpoly" (list r 0 0 ))3 U1 ^# O( m3 v6 |) ~
(repeat m19 s5 q6 P& F1 z d8 J
(setq jj (+ jj 1))
N4 r' G6 M7 a b I (setq ang (+ delta ang ))4 d H M9 F% X m5 r
(setq pt1 (list (* r (cos ang ))(* r (sin ang ))(+ bz (* j1 jj)))) |* ^; b- o! a+ X, z
(command pt1)( [) s& \$ D5 d: @) X+ G
)
7 A: e/ q1 f1 O% S& W+ e (setq bz (caddr pt1))
8 K9 N; _4 E! _9 v0 W3 Q4 E, ^' U7 Y (setq jj 0)$ q3 t1 [7 u( q; @* |. U
(repeat m0
9 ?! u9 k0 c; u7 q: W; v" u/ { (setq jj (+ jj 1))' M* w# @2 ~" `2 g1 U4 m
(setq ang (+ delta ang ))
; U; v$ u Q' [3 @ (setq pt0 (list (* r (cos ang ))(* r (sin ang ))(+ bz (* j0 jj))))
+ B3 g% t5 n5 h6 A5 h7 K: t$ x (command pt0)
% g$ I F9 S8 V5 N' d )
" J r i! k5 a* d) \/ V (setq bz (caddr pt0)); m/ F8 Z+ S! s: N. V
(setq jj 0)
Z$ r3 W/ t. ^4 u; k' `( e (repeat m1
2 J3 V7 m- Z( h (setq jj (+ jj 1)), u; Z! R- v) W
(setq ang (+ delta ang ))
2 x6 L1 _+ |/ v3 T0 A! V! M) p (setq pt2 (list (* r (cos ang ))(* r (sin ang ))(+ bz (* j1 jj)))), k( U6 z/ J r1 t& K8 W% O7 o
(command pt2)
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& J! R; a- y6 N& @/ G$ J (command "")6 h# y- o. y, B3 S5 E7 {
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发表于 2009-2-19 19:57:15
楼主