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弹簧源程序
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/ a2 Q/ d% V/ r! \- (defun errMsg (s) ; 当命令执行时出现错误 4 _1 T+ p' M# d4 R
- ; 例如用户按下了CTRL + C" `) f8 x' O+ u0 @: s% V- W* A: {
- (if (/= s "Function cancelled"). {: D' B8 S8 m! u: M
- (princ (strcat "# T5 p5 @0 }5 D5 i7 X) C4 V$ D
- Error: " s))# z9 c& f) h. X" T$ f4 R" m) V: z- W3 v
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- (setvar "cmdecho" cmdch) ; 恢复调用前的cmdecho系统变量值9 C7 @* R5 J$ P' d7 o* X, z# s
- (setvar "blipmode" blpmd) ; 恢复调用前的blipmode系统变量值" E1 _* {+ _* [7 s
- (setq *error* olderror) ; 恢复旧的错误处理. X7 G$ R( ?. G- d1 Y/ i
- (princ)
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' x% C$ H3 d+ U" Y; m- (defun spring (nRepeat cntPoint bhfac lr strad bvfac3 a$ }- V+ s& \, Y) K- R# k
- / angle distnc tp aGrw dhGrw dvGrw Pi2 dv)
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- (setvar "blipmode" 0) ; 关闭 blipmode * v7 Q% p. u' m: n
- (setvar "cmdecho" 0) ; 关闭 cmdecho
/ ]4 g! P4 L: F* n* r5 ~ - (setq Pi2 (* 3.14159265 2))
0 a, g( o7 p8 s+ C+ }" [ - (setq aGrw (/ Pi2 lr)); Q: Q2 n: g! t* P* \
- (setq dhGrw (/ bhfac lr))# S4 t9 P0 v F3 G; u
- (if bvfac (setq dvGrw (/ bvfac lr)))
0 o4 R6 |! [8 x" X$ w - (setq angle 0.0)) S+ i# T x2 T+ g- N. Q0 N
- (if bvfac
2 h5 i2 i& J! u6 V - (setq distnc strad dv 0.0)
# K4 V1 \/ E! m2 y9 J2 {8 R& y+ r - (setq distnc 0.0)1 Z! C1 P2 h) Y, I& L s
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- (if bvfac 3 Z6 W7 y# X0 K: K' Z: f
- (command "3dpoly") ; 开始绘制弹簧1 J: a7 |5 `9 S( f
- (command "pline" cntPoint) ; 从基点开始绘制弹簧
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0 @4 D$ H/ m* V - (repeat nRepeat - H* S9 P* O4 N8 |+ S ]
- (repeat lr
- G9 _) ?) `& f7 u - (setq tp (polar cntPoint (setq angle (+ angle aGrw))2 H7 ~' W4 z( ?
- (setq distnc (+ distnc dhGrw))
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- (if bvfac2 d/ C5 d7 W _1 B2 H- O" s& b. |
- (setq tp (list (car tp) (cadr tp) (+ dv (caddr tp)))
' M( [. c; T9 Q - dv (+ dv dvGrw)# q. u4 t- @ o \* S
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$ M! i) ?" T; i - (command tp) ; 继续输入下一点, [% |$ {& j# F' F( ]# }
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) I! {2 a, L4 J/ t5 b7 R - (command "") ; 输入结束, a i- R# t. w. A! ]% z- O7 g
- (princ)8 d8 d8 N3 ?$ z; M: Y/ T9 A$ ?+ c
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- ;;;
0 Q9 r: q+ I, H; ^1 L - ;;; 生成三维弹簧函数调用接口6 A6 n! o. M5 R2 c$ s" z3 W
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- (defun C:3DSPRING (/ olderror cmdch blpmd cntPt RottCnt horiGrw vertGrw bgnRdtn ptCntPerCircle)
, S! x* W; J, ]' x0 q9 y. d- E - (setq cmdch (getvar "cmdecho")) ; 获取cmdecho值,以便调用结束后恢复
2 A `2 O y, |7 } - (setq blpmd (getvar "blipmode")) ; 获取blipmode值,以便调用结束后恢复7 f9 n$ ]; o' p2 [
- (setvar "cmdecho" 0) ; 关闭 cmdecho 9 K# x" {- U, r4 r j
- (initget 1) ; cntPt 必须非空
" l% U; X- n1 U) @. f E+ f& a& m - (setq cntPt (getpoint "( H% f# N7 @: `- b U
- 请输入底部中心点: "))
: @( G3 y2 m+ Q6 P - (initget 7) ; RottCnt 必须非零、非空,不可忽略+ A2 q1 k3 n" ~$ t7 k
- (setq RottCnt (getint "7 Z# ^9 I1 h, T4 D5 v
- 旋转的圈数: "))" @1 [/ I4 D% x0 _6 o" Y3 I
- (initget 7) ; bgnRdtn 必须非零、非空,不可忽略8 a* O# }1 F' W9 j# ]( L+ x
- (setq bgnRdtn (getdist cntPt "
! n) I3 y/ l4 m# Q; I% W8 { - 起始半径: ")): R7 }) a0 v/ @; ]% ~+ D
- (initget 1) ; cf 必须非零、非空* p) l# T8 K5 Z/ `2 g7 i
- (setq horiGrw (getdist "
& b3 C1 W3 v; K# A) U - 每一圈的水平增长距离: "))' w- J$ i6 b2 P+ p! d% W# t! M# W2 [
- (initget 3) ; cf 必须非零、非空
' X( N4 j. M; a4 y9 x H5 `+ u# }. r - (setq vertGrw (getdist "% ~" J/ J4 f. `; u$ c
- 每一圈的垂直增长距离: "))) f# o$ a/ v& l$ @8 ^
- (initget 6) ; ptCntPerCircle 必须非零、不可忽略* D( t8 Y# W' H. g+ @
- (setq ptCntPerCircle (getint "( o+ t; P+ z0 K3 m
- 每一圈的插值点数<35>: "))
0 \- q' ?" l7 }0 D. s) j" m1 m - (cond ((null ptCntPerCircle) (setq ptCntPerCircle 35))) 4 n* O9 C y) F0 a
- (spring RottCnt cntPt horiGrw ptCntPerCircle bgnRdtn vertGrw)
" T0 f) x3 j5 i% f, S2 G8 v - (setvar "cmdecho" cmdch) ; 恢复调用前的cmdecho系统变量值
6 q" ?% f( v1 R - (setvar "blipmode" blpmd) ; 恢复调用前的blipmode系统变量值
. A* g5 [* ~ b4 @' s( I. l; l - (setq *error* olderror) ; Restore old *error* handler
0 f0 h( T; K* O, L6 B - (princ). U7 f9 |7 u e2 m. s5 @& J9 |8 C5 }
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