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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！！！
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* |' i+ l+ k) R% l& q$ k5 J U(defun C:spring()6 r- r; n& i; Y0 Y! }# s
(setq bp (getpoint "\n 弹簧中心点"))2 Z4 p4 V& t1 `
(setq dw (getreal "\n 弹簧直径="))
- u- d6 @9 ]8 B5 o( ] (setq d (getreal "\n 弹簧丝径="))4 |" z$ W0 Q; d6 ]( W
(setq pitch (getreal "\n 弹簧节距="))
0 [$ G+ k8 u: q/ P0 a8 c8 M, B (setq len (getreal "\n 弹簧长度＝"))3 F3 t9 [2 s9 [: ]1 d! n
(setq n (getint "\n 段数="))
. M' [ i( u7 [4 K" t% m (setq r (/(- dw d)2))" z0 t' v7 b5 o% i, z& o c J4 d0 h2 \
(setq d1 (- d (* 1.0825 pitch)))
2 ]" V6 B, z% d/ w6 G (setq r1 (/ d1 2))% o$ i; z. c9 a1 L! W# T7 w* ` H
(setq m1 (fix (* n 1.25)))& j; C6 Y" A4 @( q
(setq m0 (fix (*n (/ (- len (* d 2)) pitch))))' m6 O5 A6 @, L+ R
(setq delta (/(* 2.0 pi)n))
, m" Z$ m9 D j9 ]! |" z (setq j0 (/ pitch n ))9 @- M( a5 S& I( ~8 ^
(setq j1 (/ d n ))+ `8 f- h& n& y
(setq bz (caddr bp ))+ t5 R' n ?3 ?3 D' S' U
(setq ang 0)/ ~& T1 t! r5 a7 C0 A; i
(setq jj 0 )* ?' X( Z/ f) ~# k4 K( g) O; {
(command "UCS" "o" bp )4 x( F5 ^) _6 x; Z
(command "3dpoly" (list r 0 0 ))
* ~; K% m1 z* d( `8 Z (repeat m13 T+ r/ k7 e7 e3 _& ^* M# G
(setq jj (+ jj 1))0 A6 H4 F& s& S- k7 \
(setq ang (+ delta ang ))' |2 d5 B; a! W) z; Q1 Z! D
(setq pt1 (list (* r (cos ang ))(* r (sin ang ))(+ bz (* j1 jj))))
1 \) n& Z$ x% M% x( h% { (command pt1)
1 K+ J' N) L2 ] )1 p: K+ f' z0 \ C! b
(setq bz (caddr pt1))
' \0 a \" |& g, z5 E B. N (setq jj 0)' I. w+ U" m) y2 V+ ?
(repeat m0
5 S/ a4 s* G4 d. Q (setq jj (+ jj 1))2 A* C4 Z% A% z4 z
(setq ang (+ delta ang ))
1 O6 U. ~' v0 E3 v0 C1 E* R (setq pt0 (list (* r (cos ang ))(* r (sin ang ))(+ bz (* j0 jj))))& a9 Y; b7 Q5 } P) g4 G q
(command pt0)9 f% g0 C3 K5 w w5 D* U
)/ _5 d8 E9 O7 _& c
(setq bz (caddr pt0))
& \/ P" G! H, Y. U5 d (setq jj 0) [6 a- v+ G9 n# h# b- m% j
(repeat m1
/ h: U7 a# ^" s% e/ x7 U (setq jj (+ jj 1))
3 \7 U ?+ |! v# k0 b' S/ r! R/ O (setq ang (+ delta ang ))& {4 [3 E7 q; x Y; z. ^ m
(setq pt2 (list (* r (cos ang ))(* r (sin ang ))(+ bz (* j1 jj))))
2 _8 X* L- T# s (command pt2)' k2 Q/ N& B U. J$ L' G0 B0 ^
)1 J2 X% b' Z. S5 Q
(command "")' r0 Z$ n! {, T
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发表于 2009-2-19 19:57:15
楼主