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弹簧源程序% m" A8 s" Y* Y9 Z* Z: h5 x7 P0 T
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$ K! d7 {4 ]$ f& o$ i- (defun errMsg (s) ; 当命令执行时出现错误
* d2 t. e% P" y0 C - ; 例如用户按下了CTRL + C- c! S" s1 l1 Y8 A! R. r% H
- (if (/= s "Function cancelled")
/ R# o1 E: Y$ Y5 F4 R A8 f& Z2 @ H - (princ (strcat ") H7 G! i* i) t1 z
- Error: " s)) v& p0 V, `0 K" X/ F8 k2 t4 ^4 f
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- (setvar "cmdecho" cmdch) ; 恢复调用前的cmdecho系统变量值
! |+ }7 { R* T1 q - (setvar "blipmode" blpmd) ; 恢复调用前的blipmode系统变量值
# a7 Y1 {# q3 J$ M) q, E - (setq *error* olderror) ; 恢复旧的错误处理
- g) z7 l* o$ G1 b7 {( k - (princ)
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+ U9 [/ J$ x- k' s( P4 l9 \; m* l- (defun spring (nRepeat cntPoint bhfac lr strad bvfac! e* J: O$ @6 ]9 T7 F" V
- / angle distnc tp aGrw dhGrw dvGrw Pi2 dv)
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- (setvar "blipmode" 0) ; 关闭 blipmode ' C* t1 G' C/ `' q. i' V! l( g
- (setvar "cmdecho" 0) ; 关闭 cmdecho
# M6 P5 D4 ?2 X9 l" N! a - (setq Pi2 (* 3.14159265 2))) P% t+ C$ c4 [
- (setq aGrw (/ Pi2 lr)) i" U7 v* _: K; \ a: Q, f& v, J
- (setq dhGrw (/ bhfac lr))7 R! j2 B: H/ v5 T
- (if bvfac (setq dvGrw (/ bvfac lr)))$ c. q6 `: U% n
- (setq angle 0.0)
1 A7 c- M4 ^: ~ - (if bvfac! y, G2 O# H& Q7 }/ v
- (setq distnc strad dv 0.0)
& ]' l, _+ x1 n2 H; c0 g - (setq distnc 0.0)0 c3 J% D4 a2 D" T
- )
$ r9 R$ P: V% W; h - (if bvfac
7 N; ]8 c+ q T$ p2 ?" t - (command "3dpoly") ; 开始绘制弹簧
$ {' I8 |( O0 V8 _ - (command "pline" cntPoint) ; 从基点开始绘制弹簧1 p( M% E/ D( B: R( i- B* F* l
- )
3 g& Y1 Z( c+ _4 _# b - (repeat nRepeat
. z" @4 V- c7 w; } - (repeat lr
' }, o; S' ~& Z& R9 h - (setq tp (polar cntPoint (setq angle (+ angle aGrw)), H: V) m( J6 Z3 a( y1 t0 C9 q+ |
- (setq distnc (+ distnc dhGrw))( W) a3 o( r6 Q- Z. A9 [3 k% b
- )
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- (if bvfac' U# z4 X; S0 L1 f* H
- (setq tp (list (car tp) (cadr tp) (+ dv (caddr tp)))
. g w, H. ~0 {& Q" i! X6 e1 v - dv (+ dv dvGrw)
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- (command tp) ; 继续输入下一点9 j' o) h2 d8 Z! X: _8 U* v3 K
- )
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- t0 h+ p( P& W! e; \0 J - (command "") ; 输入结束
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- ;;; 生成三维弹簧函数调用接口
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- (defun C:3DSPRING (/ olderror cmdch blpmd cntPt RottCnt horiGrw vertGrw bgnRdtn ptCntPerCircle) 0 I3 Q3 V2 V; \9 O3 l
- (setq cmdch (getvar "cmdecho")) ; 获取cmdecho值,以便调用结束后恢复
) d3 s7 ^3 @4 F u/ I. s - (setq blpmd (getvar "blipmode")) ; 获取blipmode值,以便调用结束后恢复; l; R4 d7 v3 ^4 a5 F
- (setvar "cmdecho" 0) ; 关闭 cmdecho $ a: r' O4 Z; W
- (initget 1) ; cntPt 必须非空9 ?) e4 A+ [4 Z5 `
- (setq cntPt (getpoint "
. q# q0 j1 K) I5 r9 j# V - 请输入底部中心点: "))
' t3 M; P! l0 d8 J) M" a; b - (initget 7) ; RottCnt 必须非零、非空,不可忽略
/ L& S2 y% i# M6 f4 |# [7 v" k - (setq RottCnt (getint "5 }, O4 K% Q6 C/ G! h
- 旋转的圈数: ")): ]- l1 c1 j$ H; i
- (initget 7) ; bgnRdtn 必须非零、非空,不可忽略! ~4 O* b' L }: {
- (setq bgnRdtn (getdist cntPt "
7 U+ \# _9 p1 D- @7 `8 p - 起始半径: "))5 {% c! N' l! {5 l
- (initget 1) ; cf 必须非零、非空
1 b' T' d% z$ q! r5 V& U - (setq horiGrw (getdist "
& r; l" |- m5 m- p4 ] - 每一圈的水平增长距离: "))6 J4 u2 q" n, \7 X, `7 S
- (initget 3) ; cf 必须非零、非空
5 ` x5 D3 Z. q% U - (setq vertGrw (getdist "
q" n* ]9 P/ g - 每一圈的垂直增长距离: "))1 h- }! ~* E$ x2 u+ Q5 {) H: \
- (initget 6) ; ptCntPerCircle 必须非零、不可忽略
) d; W( u0 O/ d$ p - (setq ptCntPerCircle (getint "" z" V" _/ ]! z! i6 G
- 每一圈的插值点数<35>: "))& k+ Y( |% }! U0 o6 ^
- (cond ((null ptCntPerCircle) (setq ptCntPerCircle 35)))
6 B+ w2 X/ n7 E/ R( i* `. i; t - (spring RottCnt cntPt horiGrw ptCntPerCircle bgnRdtn vertGrw)' P8 \- }; S- W) x& R7 O
- (setvar "cmdecho" cmdch) ; 恢复调用前的cmdecho系统变量值
7 Z. \/ C; @, ], {+ x( ? - (setvar "blipmode" blpmd) ; 恢复调用前的blipmode系统变量值) _7 H g* E1 h- G! R
- (setq *error* olderror) ; Restore old *error* handler, x7 j4 H' i! r2 @/ q% Z
- (princ)
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