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弹簧源程序' j. K$ o7 O( [, y( M
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9 m% }7 V9 y: \9 O- (defun errMsg (s) ; 当命令执行时出现错误 $ J# n6 r7 R, J# |
- ; 例如用户按下了CTRL + C" u# E3 v2 ^% b0 r
- (if (/= s "Function cancelled")$ j6 u: F H m! i: b
- (princ (strcat "- X6 _0 ?" d! i( G2 H
- Error: " s))
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& _* B( V8 T& n0 X j - (setvar "cmdecho" cmdch) ; 恢复调用前的cmdecho系统变量值3 S8 F- l6 O; Y
- (setvar "blipmode" blpmd) ; 恢复调用前的blipmode系统变量值+ s; V) T( F$ l' X9 Y% l
- (setq *error* olderror) ; 恢复旧的错误处理
' F" s! o( K0 d& ?1 H- R( X - (princ)* B6 P/ K, F @) e/ B
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$ r/ f7 r+ d: f q* H; E- (defun spring (nRepeat cntPoint bhfac lr strad bvfac9 a1 K/ x7 A8 [: P
- / angle distnc tp aGrw dhGrw dvGrw Pi2 dv)
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- (setvar "blipmode" 0) ; 关闭 blipmode
% G# v& R& Z: d! w# w H: q2 W - (setvar "cmdecho" 0) ; 关闭 cmdecho
1 x, d( T+ M7 H& r N# A# t - (setq Pi2 (* 3.14159265 2))
& g6 i3 A. g2 y; O0 c9 k; r) Z - (setq aGrw (/ Pi2 lr))
q" h3 h# ?' S" X) t - (setq dhGrw (/ bhfac lr))" r" V7 ]1 u$ q3 h
- (if bvfac (setq dvGrw (/ bvfac lr)))
$ `- F; h, I5 H8 a: N! B# J - (setq angle 0.0)) n' @! E. ^% x8 H8 ^: T' I" q* t
- (if bvfac
0 X7 z0 } W3 v - (setq distnc strad dv 0.0)
3 C% }% |0 F+ v3 f) U5 S - (setq distnc 0.0)
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- (if bvfac ' _+ ]8 b* Y& Z! v
- (command "3dpoly") ; 开始绘制弹簧
3 V$ Y- K! ^: z! u4 |2 p - (command "pline" cntPoint) ; 从基点开始绘制弹簧: \! n: [/ c( Y K
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- (repeat nRepeat
; o" T# q9 e% b+ Z) a - (repeat lr
$ k, i: r/ h) C - (setq tp (polar cntPoint (setq angle (+ angle aGrw))
7 Y S" N% D( B9 J5 ? - (setq distnc (+ distnc dhGrw))4 f0 [2 L7 g0 y. B0 q( l# X$ Y
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2 K) i3 L2 Z' ^; U7 l' }! q. H1 ^ - (if bvfac; J; ^7 m& x* }' _4 l1 F- N
- (setq tp (list (car tp) (cadr tp) (+ dv (caddr tp)))! f9 ?' E. v! s2 g; s7 g+ H0 Q0 ]
- dv (+ dv dvGrw)8 Y) O3 | g# E* s5 c0 @
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6 k2 l4 o; D; ?8 C; b/ Z - (command tp) ; 继续输入下一点2 A& o6 t2 g% D4 o& @+ ^# g
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- (command "") ; 输入结束4 j2 p8 L- M* A8 t1 T8 t4 U! @' Q
- (princ)
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- ;;;( t2 C# n9 d6 F7 v
- ;;; 生成三维弹簧函数调用接口
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# Z7 [% C5 `* b) K0 l- @1 h8 Z- (defun C:3DSPRING (/ olderror cmdch blpmd cntPt RottCnt horiGrw vertGrw bgnRdtn ptCntPerCircle)
" F( |- Q' J1 ]; m8 _" n3 p: q& ` - (setq cmdch (getvar "cmdecho")) ; 获取cmdecho值,以便调用结束后恢复' i3 e+ w! C; w* q7 h9 z% E
- (setq blpmd (getvar "blipmode")) ; 获取blipmode值,以便调用结束后恢复
8 f4 o% { b* J - (setvar "cmdecho" 0) ; 关闭 cmdecho 3 a$ ~& H" G3 n
- (initget 1) ; cntPt 必须非空
' I0 V. w8 I& E9 A& F2 K - (setq cntPt (getpoint "
* r% ?- u7 I# c; m7 ] - 请输入底部中心点: "))
& r' I$ @$ i% G9 u - (initget 7) ; RottCnt 必须非零、非空,不可忽略' h9 N4 B7 `8 O) C0 ] l7 p
- (setq RottCnt (getint "
$ ?1 R; N+ s7 E4 p; r3 x - 旋转的圈数: "))
9 P- p4 i1 y7 n& w. Z$ _ - (initget 7) ; bgnRdtn 必须非零、非空,不可忽略
, X! c5 s6 q2 j! t+ T; B - (setq bgnRdtn (getdist cntPt "
1 f. ]; U5 i: a4 x' p. q - 起始半径: "))
( z& [. E. T$ s4 `+ J2 [ - (initget 1) ; cf 必须非零、非空# a' {; ~7 J7 z' }# D w9 z6 m
- (setq horiGrw (getdist ". ]# h6 n, q1 W" L
- 每一圈的水平增长距离: "))
9 f- C$ k+ X% d - (initget 3) ; cf 必须非零、非空# y8 K+ i' ^/ u3 N- y
- (setq vertGrw (getdist ". M/ v9 R+ k' l4 h- a
- 每一圈的垂直增长距离: "))$ I# l8 m7 k; W( v4 W* r
- (initget 6) ; ptCntPerCircle 必须非零、不可忽略
- W7 ~: k3 z* {5 x - (setq ptCntPerCircle (getint "
) L. h7 u* B$ T& X$ w6 L - 每一圈的插值点数<35>: "))
# Q# F! Q9 t+ |+ N! D9 [ - (cond ((null ptCntPerCircle) (setq ptCntPerCircle 35))) p1 U* C. X/ a Q- T( M
- (spring RottCnt cntPt horiGrw ptCntPerCircle bgnRdtn vertGrw)( }. {% Z& \5 i+ L5 i+ f' V
- (setvar "cmdecho" cmdch) ; 恢复调用前的cmdecho系统变量值
! @& S/ e8 j7 {, F - (setvar "blipmode" blpmd) ; 恢复调用前的blipmode系统变量值/ K# }" K: e8 J2 }8 k
- (setq *error* olderror) ; Restore old *error* handler! q6 E1 a( c! t; `
- (princ)4 M7 A( \! n; a4 |! O2 L" t
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