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弹簧源程序4 x4 w+ E6 N# }, _. x
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$ R# M) T, Y, b- (defun errMsg (s) ; 当命令执行时出现错误
# \( j9 T5 x8 |1 P7 ~ - ; 例如用户按下了CTRL + C
_$ d$ G6 w% e7 @ - (if (/= s "Function cancelled"): H0 Q% r ~5 F' `: ?0 o8 j% ]
- (princ (strcat "( n& O4 y( s! n* Y$ M- K6 U
- Error: " s))" t# [3 F7 i9 K; k
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- (setvar "cmdecho" cmdch) ; 恢复调用前的cmdecho系统变量值& @3 {* z5 C" V }5 P1 p# o' _
- (setvar "blipmode" blpmd) ; 恢复调用前的blipmode系统变量值: `- b$ N4 Y+ @
- (setq *error* olderror) ; 恢复旧的错误处理" }' D- J; o& Q* {
- (princ)# ?' Y* t' U) g$ @! A6 i
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- (defun spring (nRepeat cntPoint bhfac lr strad bvfac& a1 P8 B" G5 [9 K5 r
- / angle distnc tp aGrw dhGrw dvGrw Pi2 dv), O5 G- o; ]2 M2 O+ o! [
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- (setvar "blipmode" 0) ; 关闭 blipmode & X0 f. F7 i \5 c
- (setvar "cmdecho" 0) ; 关闭 cmdecho" i. t3 L" j/ |' a1 P1 o
- (setq Pi2 (* 3.14159265 2))! ]8 R0 g& K1 g' H+ t) i. m
- (setq aGrw (/ Pi2 lr))' b# `5 S* y+ Y# J" T* e. n
- (setq dhGrw (/ bhfac lr)) A! ?8 M, S# ?4 y5 e7 @ O
- (if bvfac (setq dvGrw (/ bvfac lr)))
& m: ~. x3 d5 l - (setq angle 0.0)" u( C* A3 ~& z8 L
- (if bvfac
& ^. u! j; Y; \/ p2 G4 d9 G) J - (setq distnc strad dv 0.0)
( h* B& \; O% U* c+ Q7 o5 h- U - (setq distnc 0.0)0 N1 w5 ^* C+ z" c* v( g% M! R
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+ p1 p7 `5 H4 } - (if bvfac
5 k {3 C2 x k3 e/ x! X3 L$ { ^ - (command "3dpoly") ; 开始绘制弹簧: w9 d' R$ M4 L+ @7 D; e! g
- (command "pline" cntPoint) ; 从基点开始绘制弹簧$ [7 c- i2 ]# |0 x
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- (repeat nRepeat
. P( I) n* y8 E* c' u" e% R - (repeat lr : Y5 R* w! m% y+ \& z0 b5 d
- (setq tp (polar cntPoint (setq angle (+ angle aGrw))1 V( h. B* O* B1 T# b5 S
- (setq distnc (+ distnc dhGrw))$ h( s# y0 S* r
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- (if bvfac
* Y+ ?3 h' T; _( X: \( g - (setq tp (list (car tp) (cadr tp) (+ dv (caddr tp)))
" ^, g O+ f. E3 i' S/ K% [ - dv (+ dv dvGrw)# N3 ~' d! k2 N2 t* X" V6 `9 ^ V
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, d/ X. l* A$ u( w% N& L% | - (command tp) ; 继续输入下一点
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7 E1 O" L' Z1 Y* ^4 C, @ - (command "") ; 输入结束1 H/ N5 u$ b8 d5 o' r
- (princ)
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- ;;;
' t5 ~+ S% T$ m. U - ;;; 生成三维弹簧函数调用接口
, ^$ ]) p' J& u F5 b; R/ Q+ d - ;;;
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- (defun C:3DSPRING (/ olderror cmdch blpmd cntPt RottCnt horiGrw vertGrw bgnRdtn ptCntPerCircle) " Z0 `" N! x- T3 C) L/ c
- (setq cmdch (getvar "cmdecho")) ; 获取cmdecho值,以便调用结束后恢复
. x$ c; h5 X) @# E - (setq blpmd (getvar "blipmode")) ; 获取blipmode值,以便调用结束后恢复" I: L0 v8 l9 r m: e: Y3 P6 G; I
- (setvar "cmdecho" 0) ; 关闭 cmdecho ) k. ~1 x7 G+ S/ ]4 o
- (initget 1) ; cntPt 必须非空
& u; m( q, U' p& Y - (setq cntPt (getpoint "
. u* Y+ } T1 H; Y% R g3 l4 ^ - 请输入底部中心点: ")), ^5 b2 S0 _! l: e) }/ x
- (initget 7) ; RottCnt 必须非零、非空,不可忽略) T4 E) D) N6 H3 w% I, e
- (setq RottCnt (getint ". N# t6 M6 M& w. A1 C/ \
- 旋转的圈数: "))0 {& z0 \ N N3 ?: D2 _) {
- (initget 7) ; bgnRdtn 必须非零、非空,不可忽略* \: l E) _" A& n+ _0 p$ A
- (setq bgnRdtn (getdist cntPt "& s: }/ L9 m1 U2 _ s4 h
- 起始半径: "))
# `- l$ t6 x8 s% h% L/ G - (initget 1) ; cf 必须非零、非空
: H9 m R4 b! n0 ~6 D8 f - (setq horiGrw (getdist "+ }$ p: n3 V% i& O2 h# H! R5 Z
- 每一圈的水平增长距离: "))7 `9 D+ w Y* q V4 Q! _
- (initget 3) ; cf 必须非零、非空
+ W* d& o$ G1 C6 P6 @ - (setq vertGrw (getdist "
+ }0 r5 k) E- b$ l - 每一圈的垂直增长距离: "))+ P- n" \' c8 c! W4 h) c4 R
- (initget 6) ; ptCntPerCircle 必须非零、不可忽略' F$ P2 g c5 P9 r- g+ L+ q' l
- (setq ptCntPerCircle (getint "
0 ?( _. k8 v1 a% p3 ? - 每一圈的插值点数<35>: "))
% W9 P' E" h" n) J" b1 U5 D* |; y( {/ \ - (cond ((null ptCntPerCircle) (setq ptCntPerCircle 35)))
) ]: S' Z% r: \ R' ^; b2 e0 q - (spring RottCnt cntPt horiGrw ptCntPerCircle bgnRdtn vertGrw), X' p! b( M2 \7 n8 T7 \
- (setvar "cmdecho" cmdch) ; 恢复调用前的cmdecho系统变量值; Z2 I& n% a: B, ~
- (setvar "blipmode" blpmd) ; 恢复调用前的blipmode系统变量值9 o6 \; P' B/ U" ^7 k+ O
- (setq *error* olderror) ; Restore old *error* handler
. l: T* ~1 W# b0 l1 _, Z- m - (princ)& s: Q- S' i& G; Y, G5 _# Y" G
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