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快速繪製3D彈簧
# D2 y4 f: r/ r% x2 m& W將下列彈簧的程式（LISP)加載到CAD中就可以使用，很方便的！
& ~$ A6 Z% x% [( Q7 C7 d;;;-----------彈簧的程式---------- + s7 J5 [5 | E1 p
(defun c:spring(/)
7 z# Y: e+ _* Y+ P5 o(setq p1(getpoint "請指定螺旋線基點:"))
% i. b7 P2 I H: V, u# N(setq r(getreal "請輸入半徑:"))
; W& ~7 W- I4 P7 f: Z- b(setq d0(getreal "請輸入彈簧絲直徑:"))
+ q* C$ l. ^. B8 C# U(setq disp(getreal "請輸入節距:")) , {0 N! Z3 B1 A" H# j, g* Y" t) ]
(setq n0(getint "請輸入圈數:"))
# O2 }' K) m \) i! @(setq n(getint "請輸入每圈細化段數(16/20/24/28/32/36/40/48/52/56/60/100):")) 8 ?0 Q: Z1 Y+ H& H
(setq n1(* 1.25 n)) ; 1 T0 c; w/ Y, c, |9 d' ~
(setq n1(fix n1))
7 \- G- d0 ^& s! C8 M(setq n2(* n0 n)) ;工作圈細化段數
* B* p4 @8 u6 B' ~7 k7 L(setq delta(/ (* 2.0 pi) n)) ;單位轉角
: E @9 i# M+ s1 Q2 l(setq j(/ disp n)) ;工作圈軸向位移量
1 m2 z3 t/ V6 A. [(setq j0(/ d0 n)) ;支撐圈軸向位移量 + P3 z' `! R* I9 h" I0 ]
(setq bb(caddr p1))
+ C( j# K2 v+ \# v7 Q- c(setq ang 0)
4 s, G( @2 ~ I/ g(setq jj 0)
& R' F4 o! f4 _0 j5 q(command "ucs" "o" p1) 4 K# {. Q' c R! E
(setq pt1(list r 0 0)) " b; P7 L8 P/ A a
(command "3dpoly" pt1)
& J1 T: p9 a m(repeat n1 ;繪製下支撐圈 * A8 b' W' _1 n3 Q" c" k
(setq jj(+ jj 1)) $ | o# I' w+ s4 C2 O
(setq ang(+ delta ang)) 6 `' w: B& |% H$ C* t
(setq pt(list (* r (cos ang)) (* r (sin ang)) (* j0 jj)))
+ o* t6 F! X \(command pt) 5 \) u: k! W" T4 }7 l. X, t- r
)
6 J5 j: ?. ^7 K(setq p2(list 0 0 (* j0 jj)))
0 i; k1 K; k5 A3 r# O(setq g1(* j0 jj)) ;下支撐圈高度 " p9 n0 `* ^* A) O0 Z
(setq jj 0) + w$ y3 D# {$ \# [1 Q7 x
(repeat n2 ;繪製工作圈
0 y$ G# X, A4 `( z(setq jj(+ jj 1)) $ J0 ~' G+ w( X, P4 d# a+ I
(setq ang(+ delta ang))
/ A0 q/ Q0 e f8 b J(setq pt(list (* r (cos ang)) (* r (sin ang)) (+ g1 (* j jj)))) 4 k8 ]$ |8 I* u1 R- m
(command pt)
$ o1 l" D# c7 x- d+ a- I) ])
. G! G( y5 b' m' z" K7 R(setq p3(list 0 0 (* j jj))) / y6 U0 W) Q, D6 J
(setq g2(* j jj)) ;4 D, G/ {( w2 R: }
(setq jj 0) 6 L/ V5 }- k2 b5 C5 c0 I5 h
(repeat n1 ;
8 {; z' z# s. R$ c" m(setq jj(+ jj 1)) 6 ?# A# k6 V; x: c8 z3 _
(setq ang(+ delta ang)) + T6 T) B1 s0 P
(setq pt(list (* r (cos ang)) (* r (sin ang)) (+ g1 g2 (* j0 jj)))) 5 t! j+ C) ]) a# ^4 c- G& X! T
(command pt) 6 ^! q9 s: y7 f* e: K
)
8 c4 r. L) i0 U(setq g3(* j0 jj)) ;0 A# g/ n, w' K" W
(command "") : T# O9 T) v3 M
(setq e1(entlast)) 9 m$ P' K. a0 k0 B, r! y
(command "ucs" "x" "") ;
4 W+ O; ~! N/ g# M, Z! _0 ~) h(command "circle" pt1 (/ d0 2)) , d* }& u1 g& k) K
(setq e2(entlast)) ) }) @' C' F+ V, V( Z" N8 W
(command "extrude" e2 "" "p" e1) 2 y; }. M+ w5 o$ d# ]; d0 ]
(setq e3(entlast))
2 O9 |+ H* S" J) \7 s$ E7 p& S8 f( `(setq pt2(list r (/ d0 4) 0)) ;
) X( c' u7 X ?# G+ q) C7 l. N(setq py(+ g1 g2 g3 (- 0 (/ d0 4))))
) ^! |& t6 Q4 f+ a! M(setq pt3(list (- 0 r) py 0)) # z$ R4 i) `% N0 `- k
(command "slice" e3 "" "zx" pt2 pt3) 7 B& s' b0 |4 l2 n/ k
(command "slice" e3 "" "zx" pt3 pt2) 0 ^8 z! l$ S3 k6 k$ S Z
(command "ucs" "w")
j8 a! ~% I+ m0 U7 k( N! A! `3 {
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;;;---------end----------彈簧程式結束！ |
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发表于 2009-6-17 19:15
楼主
搞不懂！！！！