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弹簧源程序: ?( f* p0 F! U K
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( g1 D* |3 N+ K- (defun errMsg (s) ; 当命令执行时出现错误
) E- h* y+ i0 h& {% G5 `) }+ t L - ; 例如用户按下了CTRL + C
% F+ Q9 v* h* d - (if (/= s "Function cancelled")1 n* l# }5 J& b; O* }
- (princ (strcat "7 S# ]* t% |0 z) {1 O
- Error: " s))
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* s# _$ n9 v" A - (setvar "cmdecho" cmdch) ; 恢复调用前的cmdecho系统变量值
- T$ S; R* S5 p - (setvar "blipmode" blpmd) ; 恢复调用前的blipmode系统变量值
# w, Y% k0 X# D6 V8 L- K. i1 ^/ U - (setq *error* olderror) ; 恢复旧的错误处理! q* U4 V6 p+ X& u8 G
- (princ)
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# x) Z o5 Y* C- l- (defun spring (nRepeat cntPoint bhfac lr strad bvfac
; ~0 m# X* {* }; M7 i1 n5 D% D$ d) ^( | - / angle distnc tp aGrw dhGrw dvGrw Pi2 dv)
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- (setvar "blipmode" 0) ; 关闭 blipmode 8 I$ w# q: H! y- e. @
- (setvar "cmdecho" 0) ; 关闭 cmdecho
2 A% B) F/ P$ E - (setq Pi2 (* 3.14159265 2))' ?! \% \; \" D3 e& e2 b, l
- (setq aGrw (/ Pi2 lr))
: U& z0 A" v& g* U. E9 E - (setq dhGrw (/ bhfac lr)). R' J' x' L: n
- (if bvfac (setq dvGrw (/ bvfac lr)))! T2 l3 A6 S2 e. ?
- (setq angle 0.0)
* p. ]: o* G* m$ ` - (if bvfac* p+ X, G: _4 ~1 `) [
- (setq distnc strad dv 0.0)/ n) Y, l8 \8 d5 o' X/ |( Y, G
- (setq distnc 0.0)
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* s8 z: q* D! r" I6 T - (if bvfac
1 S; }( |/ ]0 O2 U9 G8 ` - (command "3dpoly") ; 开始绘制弹簧
8 {+ G# E0 A- q3 D. R* w - (command "pline" cntPoint) ; 从基点开始绘制弹簧' ]6 T* t% c: v+ C( J% w# r
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- (repeat nRepeat ! D! F, Y2 m" p/ \2 e1 [
- (repeat lr # J0 ?* j6 X+ `, a1 ^0 n( r
- (setq tp (polar cntPoint (setq angle (+ angle aGrw))2 u8 |3 P2 F" O, |6 R3 ?
- (setq distnc (+ distnc dhGrw))- t+ ~" d- M4 o$ M1 x0 T
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- (if bvfac
% f6 \ ^" v, f - (setq tp (list (car tp) (cadr tp) (+ dv (caddr tp)))2 i% g# _* h, N
- dv (+ dv dvGrw)
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( `2 c: @! z7 L6 w0 @ - (command tp) ; 继续输入下一点
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- (command "") ; 输入结束; i% z: z) e4 i1 ~
- (princ)0 S/ {; u1 i( h) I6 D, P2 R
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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)
) V3 |) V2 T; i. G5 O/ K - (setq cmdch (getvar "cmdecho")) ; 获取cmdecho值,以便调用结束后恢复
, a) b+ I& |3 k, X( T4 ~ I - (setq blpmd (getvar "blipmode")) ; 获取blipmode值,以便调用结束后恢复
; K/ e4 q+ c% H! U8 B4 W% Z. o - (setvar "cmdecho" 0) ; 关闭 cmdecho
' F0 \4 Y y6 D6 R) f$ F - (initget 1) ; cntPt 必须非空
) N) ?) a5 }2 k: q/ j6 x' A0 T% o - (setq cntPt (getpoint "4 y; F# H" P( e! Q
- 请输入底部中心点: "))
; |5 u7 ?0 D; E" d3 L - (initget 7) ; RottCnt 必须非零、非空,不可忽略
# b% p) h7 l) a } q - (setq RottCnt (getint "8 v/ }/ P& t+ `: Y9 l
- 旋转的圈数: "))
- ^# P1 t7 Z6 b. W0 h. |7 j - (initget 7) ; bgnRdtn 必须非零、非空,不可忽略, P, _9 Q+ ?. P5 l+ I: e
- (setq bgnRdtn (getdist cntPt "
8 W$ P3 ^3 \! q7 m, E! J - 起始半径: "))/ o7 w6 K, I- @
- (initget 1) ; cf 必须非零、非空
& s" o2 x% }. U' N# k' ^3 k - (setq horiGrw (getdist "
: ]1 `8 T. R% p0 L- f - 每一圈的水平增长距离: "))
$ ?$ R/ w8 o* Z - (initget 3) ; cf 必须非零、非空% V/ ^# x0 ]) R4 y O
- (setq vertGrw (getdist "
5 ]& f; I5 @; D- K% g - 每一圈的垂直增长距离: "))
0 G* d4 t& i7 ~4 E' p - (initget 6) ; ptCntPerCircle 必须非零、不可忽略* F0 y; N6 {; Y/ c# J+ Q1 k/ x
- (setq ptCntPerCircle (getint "
! D/ ?# P5 q; f9 m - 每一圈的插值点数<35>: "))
$ g) |" {4 r, |# W. U' |- \ - (cond ((null ptCntPerCircle) (setq ptCntPerCircle 35)))
) v. x; |: F& F# A# T" t# e/ p0 y8 G - (spring RottCnt cntPt horiGrw ptCntPerCircle bgnRdtn vertGrw)1 N$ g* j" Q" J, N6 g9 Y8 W6 ]
- (setvar "cmdecho" cmdch) ; 恢复调用前的cmdecho系统变量值
2 {0 w+ t% Y- V3 ^: b - (setvar "blipmode" blpmd) ; 恢复调用前的blipmode系统变量值. ~0 P' T0 [4 F8 a, N/ o! R
- (setq *error* olderror) ; Restore old *error* handler0 \9 t" o$ ]9 x* ?. _9 l5 F5 x
- (princ)
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