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弹簧源程序: h% {4 J8 B' ^
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$ T: h1 j- R% X: L) p, }) ^- (defun errMsg (s) ; 当命令执行时出现错误 ; D# Q- z* o% W. f1 }, r
- ; 例如用户按下了CTRL + C- w$ I# p; k3 y( f& Y( j; b/ S
- (if (/= s "Function cancelled")( Q! E0 @" m Y3 X( V& K! k
- (princ (strcat "/ a$ v$ B& D, L; Q
- Error: " s))" H# N7 h& R0 W' h6 m
- )
( X% v6 Q: X, Y3 d - (setvar "cmdecho" cmdch) ; 恢复调用前的cmdecho系统变量值8 U r* H* R- E* U1 f' r! i
- (setvar "blipmode" blpmd) ; 恢复调用前的blipmode系统变量值! k/ \0 @) v* g
- (setq *error* olderror) ; 恢复旧的错误处理$ s; s# @: ^/ T+ R6 t4 v. o3 W
- (princ)
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- (defun spring (nRepeat cntPoint bhfac lr strad bvfac9 a0 V3 t, m9 e3 n# \, r
- / angle distnc tp aGrw dhGrw dvGrw Pi2 dv)
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- (setvar "blipmode" 0) ; 关闭 blipmode . C% u# ?( D3 M! g/ a" E$ l0 f
- (setvar "cmdecho" 0) ; 关闭 cmdecho' R2 Z0 J8 c% T! N' l2 m
- (setq Pi2 (* 3.14159265 2))5 ]& Z1 u% U I' ^/ E# C9 a
- (setq aGrw (/ Pi2 lr)); U" u5 i: x+ q) a; a5 w+ f
- (setq dhGrw (/ bhfac lr))" t$ S, L5 i; Z. y& o0 C9 T7 e
- (if bvfac (setq dvGrw (/ bvfac lr)))
5 }" V- }) ]0 \2 c - (setq angle 0.0)
3 k" a! o* f- C/ [* g" N - (if bvfac
; c0 Z; G \ F- t$ P' b& t, U. n - (setq distnc strad dv 0.0)
7 p, F ^) Q- G2 R - (setq distnc 0.0)+ _- ]2 b7 A5 \
- )
' Z3 Y6 ^. f5 ?1 ^7 B! H. Q) t - (if bvfac . c" S$ H/ N! {5 T/ r& x
- (command "3dpoly") ; 开始绘制弹簧
: C6 H1 l8 R: }( |+ `- Q4 `) `5 h# U - (command "pline" cntPoint) ; 从基点开始绘制弹簧
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- (repeat nRepeat ( f) l& U9 y+ r* J! f) f. K2 Q
- (repeat lr
1 g) o& i* e6 d* d4 a7 K+ `. q - (setq tp (polar cntPoint (setq angle (+ angle aGrw))
' X0 P. V* b/ \) p+ P4 | - (setq distnc (+ distnc dhGrw)), k* o& P6 y1 ^/ S& a
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- )
5 P. [9 c8 U B1 X q - (if bvfac
* w2 Q$ s% f1 Q2 s( J - (setq tp (list (car tp) (cadr tp) (+ dv (caddr tp)))$ b; x% g# N! A9 x& }" V
- dv (+ dv dvGrw)
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% x& Y) S! J! G6 P) b6 v - (command tp) ; 继续输入下一点" ?( P5 Y- X5 ~) F* |+ C6 c
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: X1 x4 G5 |5 }; w9 ~5 r& q: u - (command "") ; 输入结束# }) b& r: @ K; N+ r
- (princ)( e' V9 D& e, u- z4 w* `: c
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- ;;;
4 s1 V& K* j7 o D: S - ;;; 生成三维弹簧函数调用接口+ J# w8 [; `, M# v7 q8 g
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4 C$ ` X+ y" O2 J$ c: z8 D- (defun C:3DSPRING (/ olderror cmdch blpmd cntPt RottCnt horiGrw vertGrw bgnRdtn ptCntPerCircle) 2 q2 V6 a! i# j$ v9 T! m4 Z
- (setq cmdch (getvar "cmdecho")) ; 获取cmdecho值,以便调用结束后恢复
* S" V1 |, [- a+ g5 `/ B - (setq blpmd (getvar "blipmode")) ; 获取blipmode值,以便调用结束后恢复
. ?# H# Z3 G) b - (setvar "cmdecho" 0) ; 关闭 cmdecho % ]7 {+ r% @; [; ?* [; Y
- (initget 1) ; cntPt 必须非空/ g' x- O6 ~7 H4 [$ r1 w* G1 o! u
- (setq cntPt (getpoint "3 i) L% |' k0 u+ j
- 请输入底部中心点: "))6 b. u- m7 W& D) j Y H5 A
- (initget 7) ; RottCnt 必须非零、非空,不可忽略3 c9 r/ T$ O) [8 f) l; `
- (setq RottCnt (getint "
1 [/ P0 Z# y$ N8 o) s) ] - 旋转的圈数: "))1 _, V+ |* y7 J' a2 s" a! ~
- (initget 7) ; bgnRdtn 必须非零、非空,不可忽略
& Z; V' g( v j, I& X: b8 C* w - (setq bgnRdtn (getdist cntPt "& ^& K8 l2 z* D6 c) b$ W
- 起始半径: "))
- L0 ^0 ~2 I4 [7 _$ l - (initget 1) ; cf 必须非零、非空
9 {# X1 I$ z1 ?2 |: c; Q - (setq horiGrw (getdist "; A! S4 h8 c% v+ B' D3 O% |
- 每一圈的水平增长距离: "))5 c6 O0 j+ y1 P& x! V- J
- (initget 3) ; cf 必须非零、非空
+ }, t; m% l8 c F) [ - (setq vertGrw (getdist "
+ W* ^3 i% `$ [- c& f. w. f6 Q5 N - 每一圈的垂直增长距离: "))
! t/ O: K* P- Y. | - (initget 6) ; ptCntPerCircle 必须非零、不可忽略
2 e. ?( U1 G. o; T. @ - (setq ptCntPerCircle (getint "3 b; T% d. K# l4 D2 ?# K; c, \& ~
- 每一圈的插值点数<35>: "))
. D; v0 }" R$ J1 I - (cond ((null ptCntPerCircle) (setq ptCntPerCircle 35)))
1 A5 \1 A: B$ [5 U$ R - (spring RottCnt cntPt horiGrw ptCntPerCircle bgnRdtn vertGrw)6 B* }% {; n% J
- (setvar "cmdecho" cmdch) ; 恢复调用前的cmdecho系统变量值
8 F" |+ D$ N. v* q - (setvar "blipmode" blpmd) ; 恢复调用前的blipmode系统变量值
, U* A9 s- {. ~$ u. C) J' ? - (setq *error* olderror) ; Restore old *error* handler
/ d% P w: G L5 ]( S0 l# h - (princ)! Y N+ D/ F2 z. {$ b2 B @
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