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弹簧源程序
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- (defun errMsg (s) ; 当命令执行时出现错误
- z+ C, S2 ?; z6 ~: R9 D/ A, B$ C - ; 例如用户按下了CTRL + C
( T! s2 w# @8 B- `; `% R2 e( _- q - (if (/= s "Function cancelled"): d- S% N0 P3 X! o% W" L
- (princ (strcat "
* x+ Z5 `6 {1 D- `: t, X$ R4 J% m - Error: " s))
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# w5 d0 l4 M" z9 y. d - (setvar "cmdecho" cmdch) ; 恢复调用前的cmdecho系统变量值5 \( S$ f! E& T5 w) I: ~
- (setvar "blipmode" blpmd) ; 恢复调用前的blipmode系统变量值4 z" |+ G& J% ]6 ~
- (setq *error* olderror) ; 恢复旧的错误处理
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& x) A' s7 M6 f% w$ U; W- (defun spring (nRepeat cntPoint bhfac lr strad bvfac7 L/ H2 Z- u O, N! Z. X
- / angle distnc tp aGrw dhGrw dvGrw Pi2 dv), O3 \9 e. i; {4 U" O, v+ V
0 z2 X$ K7 ^+ }5 D n! |, w- (setvar "blipmode" 0) ; 关闭 blipmode
! h' e( w u# } - (setvar "cmdecho" 0) ; 关闭 cmdecho/ G9 }4 z7 Z, V9 o' N5 e/ v7 [& b
- (setq Pi2 (* 3.14159265 2))
% a9 F" L u+ Y( y" z% H6 V7 ?4 Z - (setq aGrw (/ Pi2 lr))
! q6 \" l/ t/ v/ m/ n+ ^ - (setq dhGrw (/ bhfac lr))6 X- [ E1 a0 c' w5 X( @7 U
- (if bvfac (setq dvGrw (/ bvfac lr)))9 ^) L' e# [& \
- (setq angle 0.0)
0 {! O/ }' }8 T+ k - (if bvfac* D% h0 k& {5 c+ O! ~
- (setq distnc strad dv 0.0): i; t' G: h5 ]# r2 G1 R
- (setq distnc 0.0)
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( [% \" ~, V. O* F, ? - (if bvfac
9 p. T5 `! D* N8 x - (command "3dpoly") ; 开始绘制弹簧
/ P3 ], ?1 _% L; F! Y - (command "pline" cntPoint) ; 从基点开始绘制弹簧
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$ r8 `7 @: n* [2 T - (repeat nRepeat
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" h2 C8 B& A& x; T6 u - (setq tp (polar cntPoint (setq angle (+ angle aGrw))
; {" X7 A" `& c: ~" j) E - (setq distnc (+ distnc dhGrw))
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7 U c( c% `8 a& ~0 Y. r6 m - (if bvfac2 z/ f7 I0 B4 m0 v* q4 \
- (setq tp (list (car tp) (cadr tp) (+ dv (caddr tp)))
- {% t& e! a6 ^4 h8 G& s - dv (+ dv dvGrw)
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5 B& [ e6 A* g+ c# U1 Y9 E - (command tp) ; 继续输入下一点/ s+ c7 h, v6 d" I* \& E! }1 k/ p- i
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6 O' u0 c3 x3 t# R/ q - (command "") ; 输入结束
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2 K$ s p1 ~9 w# E( a2 F - ;;; 生成三维弹簧函数调用接口3 E7 A3 ~6 P( M9 M7 @# t
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- (defun C:3DSPRING (/ olderror cmdch blpmd cntPt RottCnt horiGrw vertGrw bgnRdtn ptCntPerCircle) & a& \- Z8 _# d
- (setq cmdch (getvar "cmdecho")) ; 获取cmdecho值,以便调用结束后恢复
! w8 H! x; d. q - (setq blpmd (getvar "blipmode")) ; 获取blipmode值,以便调用结束后恢复6 \' L5 Z3 l- I. K' q
- (setvar "cmdecho" 0) ; 关闭 cmdecho 8 o1 T/ O) s% x1 z
- (initget 1) ; cntPt 必须非空
$ O8 v+ x* X: \4 P' F2 D8 z - (setq cntPt (getpoint "
7 {4 b u& f) I3 ]; Z+ }9 g( E - 请输入底部中心点: "))
% T$ Q( w6 [6 x+ q, R. w - (initget 7) ; RottCnt 必须非零、非空,不可忽略' e# D9 d3 B9 ^2 b- n
- (setq RottCnt (getint "
?" x$ q e3 v) F - 旋转的圈数: "))! @6 I) y# z4 j. |* k; J
- (initget 7) ; bgnRdtn 必须非零、非空,不可忽略
+ j; `6 x. b3 j8 E6 I9 M - (setq bgnRdtn (getdist cntPt "' T* w* @+ N, ?1 a
- 起始半径: "))
8 k0 M' \8 X% a: [& E8 q# E - (initget 1) ; cf 必须非零、非空
; x* C* |1 F, @/ A0 } W+ q - (setq horiGrw (getdist ". [+ K* w# L1 {: h% I* z0 @9 E
- 每一圈的水平增长距离: "))
) o. V h. Y) ]6 C; m/ z: N. Y8 @ - (initget 3) ; cf 必须非零、非空. X! S Z }7 B3 |
- (setq vertGrw (getdist "2 N2 y8 }6 u1 }2 t! x
- 每一圈的垂直增长距离: "))) Q! x8 h0 W4 l1 Q# E# P
- (initget 6) ; ptCntPerCircle 必须非零、不可忽略0 Y4 o+ T1 O0 ^
- (setq ptCntPerCircle (getint ", u2 r, E% A) n3 E* N
- 每一圈的插值点数<35>: "))9 \% x" o' J) O# \5 W( m
- (cond ((null ptCntPerCircle) (setq ptCntPerCircle 35)))
" J( c0 R1 Z- \/ s - (spring RottCnt cntPt horiGrw ptCntPerCircle bgnRdtn vertGrw)7 \8 T5 P5 i! @) ]% j
- (setvar "cmdecho" cmdch) ; 恢复调用前的cmdecho系统变量值* X7 ]# Y6 {2 g. @& d m- Y1 g( T
- (setvar "blipmode" blpmd) ; 恢复调用前的blipmode系统变量值% {) }3 Y, p: Q% e+ j
- (setq *error* olderror) ; Restore old *error* handler
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