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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！！！6 X* ~( F% ~( F+ p# B. w
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(defun C:spring()! I! l) |7 R) E7 _. h; g
(setq bp (getpoint "\n 弹簧中心点"))0 P! G7 A A" o# q7 y; a
(setq dw (getreal "\n 弹簧直径="))2 b( t- g( q* x1 G
(setq d (getreal "\n 弹簧丝径="))4 Q' C! V' T9 Z: k L
(setq pitch (getreal "\n 弹簧节距="))% H% H$ M: w8 W
(setq len (getreal "\n 弹簧长度＝"))2 y( L9 @- R8 \; G( i
(setq n (getint "\n 段数="))
1 `- k9 ?9 i3 [, R" g, D1 s (setq r (/(- dw d)2))
% k! t m( K0 w (setq d1 (- d (* 1.0825 pitch)))& V8 K$ y3 X/ @
(setq r1 (/ d1 2)). p" W7 e6 m& c- o2 w
(setq m1 (fix (* n 1.25)))# `) @7 l9 a) B
(setq m0 (fix (*n (/ (- len (* d 2)) pitch))))
6 Z6 }* `* M0 j$ ]; T. e4 F (setq delta (/(* 2.0 pi)n))4 ?: ]4 b, r/ \) }1 d6 J& q' `
(setq j0 (/ pitch n ))6 Y; G8 A5 t) ]5 {, ~- l; Q
(setq j1 (/ d n ))
' V+ `! f. t5 E7 e* [% }% u (setq bz (caddr bp ))
( u. W! q$ E& a C+ I, M U) z' K (setq ang 0)
2 P) O0 n. _" [ (setq jj 0 )
1 j, e: ]) v( e& z8 K @7 c (command "UCS" "o" bp )
2 z% ` c9 W9 o8 @ (command "3dpoly" (list r 0 0 ))
, r) B, C- P) v2 C% C (repeat m1
9 |1 v# b1 F' U- Z/ g (setq jj (+ jj 1))% J4 d& R; V) J$ ?! u) R( H
(setq ang (+ delta ang ))
/ G3 T' Y4 z, B" u5 N: I+ Z5 A (setq pt1 (list (* r (cos ang ))(* r (sin ang ))(+ bz (* j1 jj))))
: v A# d2 ~4 ~8 h$ ]- m (command pt1)* L; j' E/ f1 J- {5 D K3 t
)
+ x& U9 Y3 `% H (setq bz (caddr pt1))4 s" O2 |: K0 h
(setq jj 0)4 w, J5 d a2 f1 \& j
(repeat m0
% g1 r1 G/ x9 H$ a' Y4 W (setq jj (+ jj 1))" `" d1 u5 P, y3 @ g$ X9 j2 Z0 P
(setq ang (+ delta ang ))
, |6 S4 g4 s3 ^; y, }5 p (setq pt0 (list (* r (cos ang ))(* r (sin ang ))(+ bz (* j0 jj))))! }8 t3 Z) e" [1 I1 Q
(command pt0)& [- ]4 C( F7 _2 Z7 S/ G) l
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(setq bz (caddr pt0))
0 {) x& D/ F6 m4 D (setq jj 0)4 x1 f- f z, M+ _
(repeat m1
( r! L6 j- d. [ M* W' d (setq jj (+ jj 1))3 u0 u1 B- C+ e" [: n) J0 F
(setq ang (+ delta ang ))
# h3 W; u3 G& p; X# V1 v/ j (setq pt2 (list (* r (cos ang ))(* r (sin ang ))(+ bz (* j1 jj)))), E) s# _; e L [: U- s; Z1 v0 K
(command pt2)
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(command "")$ z+ Y; B: {, U4 D8 y2 R
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发表于 2009-2-19 19:57:15
楼主