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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！！！! h& p' i$ H, G2 B7 W
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(defun C:spring()
, `1 T& }0 @- ^/ p7 P% N# G0 P (setq bp (getpoint "\n 弹簧中心点"))
) H7 [3 o% c( M, C1 K (setq dw (getreal "\n 弹簧直径="))& Q$ F/ j0 g2 Q, ^! W5 K
(setq d (getreal "\n 弹簧丝径="))6 k' i1 h: f0 y/ O
(setq pitch (getreal "\n 弹簧节距="))
- M$ e* E' T' p+ E8 c; r (setq len (getreal "\n 弹簧长度＝"))
4 _0 h) B8 }& c3 p+ ] (setq n (getint "\n 段数="))
. w0 ^/ J( S; w# O (setq r (/(- dw d)2))
% Y) ?5 F2 r5 D- V" w3 y (setq d1 (- d (* 1.0825 pitch)))
$ x( F3 N' T2 e3 w+ Q! i (setq r1 (/ d1 2))
i( e2 z7 j" R% Q: C& }2 S (setq m1 (fix (* n 1.25)))
! d0 A7 V- C: U. S% h0 O (setq m0 (fix (*n (/ (- len (* d 2)) pitch))))5 u R8 U! |7 G1 i
(setq delta (/(* 2.0 pi)n))( ?4 v8 z* Q# k6 b' C
(setq j0 (/ pitch n ))
5 x) u8 x) c1 D (setq j1 (/ d n ))8 z: @& } g1 o- J7 p
(setq bz (caddr bp ))
8 x8 ^$ e7 V! p9 ] (setq ang 0)
Y8 r/ T) u/ i: s4 l (setq jj 0 )1 ~5 s' L3 t* L! I
(command "UCS" "o" bp ): n* ^9 e7 b. X0 y; s& v
(command "3dpoly" (list r 0 0 ))
4 c) ?3 U; q! P; r (repeat m12 F7 {4 ]5 ?4 ]+ d2 Z' A
(setq jj (+ jj 1))
1 c, m! J' S, p2 i7 h9 n (setq ang (+ delta ang ))
: y& c; s3 Y, K9 t6 g% p3 O. y$ c (setq pt1 (list (* r (cos ang ))(* r (sin ang ))(+ bz (* j1 jj))))2 W) M9 l l8 y: O9 r1 y: {
(command pt1)7 S0 j- U9 _8 b+ p# i
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(setq bz (caddr pt1))& h4 v' I ] i* q
(setq jj 0)7 f. s. b" n: v( ]( ?# R
(repeat m0$ d( A% d! s, ]% q) o$ y0 G1 O5 \
(setq jj (+ jj 1))
- R+ ?' b( _& Z (setq ang (+ delta ang ))
# v8 O' I9 w9 Z1 ~; \* v (setq pt0 (list (* r (cos ang ))(* r (sin ang ))(+ bz (* j0 jj))))
4 R" j& O) s& A% P" q (command pt0)
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(setq bz (caddr pt0))
9 J k, a. T9 v7 u* ?2 b (setq jj 0)6 D5 g/ i1 n" ?6 @ Y' I
(repeat m1
* T t |6 l' D (setq jj (+ jj 1))
+ ~+ B; B; _/ L! v2 P (setq ang (+ delta ang ))8 O, W B. {1 W& _
(setq pt2 (list (* r (cos ang ))(* r (sin ang ))(+ bz (* j1 jj)))); G2 {# S+ r+ [3 p4 k E
(command pt2)
# q4 j% Y q0 f# H& q" s )
' ?2 B6 N0 Z, F# q* l! v5 D) a- W9 K (command "")0 f- ?6 s. Q. Q g: Z% q% G0 M a1 O
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发表于 2009-2-19 19:57:15
楼主