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弹簧源程序
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& Y6 R1 m M, X* q- (defun errMsg (s) ; 当命令执行时出现错误
$ a. U0 O) V8 v2 L; A - ; 例如用户按下了CTRL + C
; Y- {( ]0 o' C* U - (if (/= s "Function cancelled")/ b7 {4 E' F5 @7 c; Z7 @. |2 m) z
- (princ (strcat "
4 @' i) N! r- d0 z - Error: " s))% i z5 u/ G0 N+ I1 L0 \
- )
1 Y" { @1 c" L+ Z" G+ x - (setvar "cmdecho" cmdch) ; 恢复调用前的cmdecho系统变量值! | m$ {) ^ S, z0 a* j3 U
- (setvar "blipmode" blpmd) ; 恢复调用前的blipmode系统变量值2 m. ?0 h4 p% h: F) i7 K& ?1 o/ H: U
- (setq *error* olderror) ; 恢复旧的错误处理
7 |% H* F7 \4 Y. j; C2 I, P1 ` - (princ)
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- ( N. h& a3 ^; i! A, M: S
- (defun spring (nRepeat cntPoint bhfac lr strad bvfac
9 k# X7 `8 [9 z+ N# p0 u - / angle distnc tp aGrw dhGrw dvGrw Pi2 dv)
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- (setvar "blipmode" 0) ; 关闭 blipmode
" b. g1 O/ _) c! t# y/ @ - (setvar "cmdecho" 0) ; 关闭 cmdecho; b* P. Z' O: C$ j
- (setq Pi2 (* 3.14159265 2))
3 A# c. b- y/ | t - (setq aGrw (/ Pi2 lr)), F$ J. w4 r$ j
- (setq dhGrw (/ bhfac lr))/ Y7 ]3 K, a! G( X. U
- (if bvfac (setq dvGrw (/ bvfac lr)))# _5 {4 I' o+ ]: Q0 i
- (setq angle 0.0)0 X' a$ C9 m8 P$ v! q8 _
- (if bvfac
* f+ C( ]9 e' p7 b4 R9 L8 r# s - (setq distnc strad dv 0.0)
- D5 \9 N' d d - (setq distnc 0.0)$ o n4 U8 }, c7 T. Q/ X4 i5 m
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" l5 q) t8 |* A" u; ` - (if bvfac 2 @8 Q$ z$ ? V/ n
- (command "3dpoly") ; 开始绘制弹簧
/ C$ F: e( K/ L( m7 q) `5 _6 \. X - (command "pline" cntPoint) ; 从基点开始绘制弹簧
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1 v" c+ i; k7 z5 l# `0 I: c - (repeat nRepeat
) B3 @8 H$ _7 Q" J" _: {( h - (repeat lr # g+ e1 R/ s! W) y0 w A/ w
- (setq tp (polar cntPoint (setq angle (+ angle aGrw))
0 y, S M4 l% Y - (setq distnc (+ distnc dhGrw))' e5 L5 b( E K
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- (if bvfac: I/ d, q2 G) z" K1 w( |8 O) H
- (setq tp (list (car tp) (cadr tp) (+ dv (caddr tp)))
6 P/ ?; _( C9 C2 l - dv (+ dv dvGrw)
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; R0 \! _) L9 l8 _2 _7 ] - (command tp) ; 继续输入下一点
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, Z$ i& z- W. x - (command "") ; 输入结束
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- ;;; 生成三维弹簧函数调用接口% _3 \9 ^. J4 H+ [7 {+ x
- ;;;
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- (defun C:3DSPRING (/ olderror cmdch blpmd cntPt RottCnt horiGrw vertGrw bgnRdtn ptCntPerCircle) 4 O0 ^2 g+ ~ Z# q9 t
- (setq cmdch (getvar "cmdecho")) ; 获取cmdecho值，以便调用结束后恢复
& |9 H; J+ N7 v - (setq blpmd (getvar "blipmode")) ; 获取blipmode值，以便调用结束后恢复1 I4 ~. ~4 d" b S7 Z. O
- (setvar "cmdecho" 0) ; 关闭 cmdecho
) ? n: h" \6 l! t3 u9 j - (initget 1) ; cntPt 必须非空8 Q- c1 @% Y* h+ r( s: ?! ~- [
- (setq cntPt (getpoint "
9 H( O/ U; b* |' |" g - 请输入底部中心点: ")). r0 V8 b1 r/ m
- (initget 7) ; RottCnt 必须非零、非空,不可忽略2 v. h! \# a8 p8 A
- (setq RottCnt (getint "
! ~7 f1 L( {: ~1 H4 Q - 旋转的圈数: "))' M% |4 u G8 H1 y0 ?/ O
- (initget 7) ; bgnRdtn 必须非零、非空,不可忽略
7 v# H7 v1 I' T7 U: L+ _1 g - (setq bgnRdtn (getdist cntPt "% s7 H5 I. b# @. g( `
- 起始半径: "))
# ] @: C0 _$ Z$ z! ~ - (initget 1) ; cf 必须非零、非空
# G- {, }; O& X' T/ e# a - (setq horiGrw (getdist "1 _ a2 E# L; \9 c
- 每一圈的水平增长距离: "))! q: r+ H) i4 Q; u
- (initget 3) ; cf 必须非零、非空+ {; {. i, V& C2 B7 h+ U6 ~
- (setq vertGrw (getdist ". c. l5 P+ Y6 n" h5 M3 i3 R, |
- 每一圈的垂直增长距离: "))$ r# j+ x0 F7 e6 W- p& d! e
- (initget 6) ; ptCntPerCircle 必须非零、不可忽略" Y R8 g: ?9 x; P" m6 Y) l
- (setq ptCntPerCircle (getint "
, y& R q* m! n - 每一圈的插值点数<35>: "))9 p" q! z9 O! k' x. w2 p+ X. o
- (cond ((null ptCntPerCircle) (setq ptCntPerCircle 35))) 5 K, N* [6 @3 F5 t
- (spring RottCnt cntPt horiGrw ptCntPerCircle bgnRdtn vertGrw)3 I. Y. |3 g2 {( B
- (setvar "cmdecho" cmdch) ; 恢复调用前的cmdecho系统变量值
4 `' G) s+ E$ i5 [8 T: F3 t+ k - (setvar "blipmode" blpmd) ; 恢复调用前的blipmode系统变量值
$ M, U _% F& u9 z' E+ I9 D - (setq *error* olderror) ; Restore old *error* handler5 _/ @" M3 m2 |4 I8 ~8 y
- (princ)9 [- F) O& B3 {! M
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发表于 2010-3-13 11:12
楼主