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弹簧源程序7 |2 c' _ {( s
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* z' k% Y; D8 e9 M" o% y) s- (defun errMsg (s) ; 当命令执行时出现错误
9 O1 r: }/ M- e - ; 例如用户按下了CTRL + C
7 U; G% S# y8 ~ - (if (/= s "Function cancelled")
9 _3 w+ Q5 f9 a6 Z q - (princ (strcat "
& k# J3 o- d9 m5 n+ d+ X - Error: " s))5 W* j- L$ e( R3 f" h, i
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# s! \3 t, c- r0 } - (setvar "cmdecho" cmdch) ; 恢复调用前的cmdecho系统变量值
' c3 s5 g. k0 j1 h: U - (setvar "blipmode" blpmd) ; 恢复调用前的blipmode系统变量值0 e- m& W: f! Q1 C4 e5 q R, H
- (setq *error* olderror) ; 恢复旧的错误处理
% t3 P2 {5 m R- d& F - (princ)- I4 o) Y! e5 W+ \& Y2 C6 b& c; X
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9 O: m/ B. X% {' G- }: C5 |- (defun spring (nRepeat cntPoint bhfac lr strad bvfac
4 T+ ^4 }, \6 R5 I% ~) a - / angle distnc tp aGrw dhGrw dvGrw Pi2 dv)
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- (setvar "blipmode" 0) ; 关闭 blipmode
# L$ u' h7 G! _4 a - (setvar "cmdecho" 0) ; 关闭 cmdecho
, e# f- ?( T1 j# G4 b+ O0 V - (setq Pi2 (* 3.14159265 2))
! S! ^& {5 ?0 ]3 ~* b4 u. e - (setq aGrw (/ Pi2 lr))6 Z/ n l0 {. ]1 q: |% }3 o; p6 x
- (setq dhGrw (/ bhfac lr))
. U6 Z0 l& K7 S1 O" u9 A' w - (if bvfac (setq dvGrw (/ bvfac lr))): x6 m7 ~) D( T4 {; s
- (setq angle 0.0)- {/ n. |6 G3 z6 \4 k4 J. \- F( Y
- (if bvfac
6 k! r' v% p5 O6 C4 [ - (setq distnc strad dv 0.0)" a' d1 Z9 w$ p4 q7 I
- (setq distnc 0.0)7 x2 ]8 H: a. E! Y* i8 `& Z4 z. {' f% y
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( {9 W/ o0 ~; Y - (if bvfac
7 W1 F* o% R) m1 y8 Z. v: K - (command "3dpoly") ; 开始绘制弹簧& W: X% R6 q! y( p# Y( V
- (command "pline" cntPoint) ; 从基点开始绘制弹簧
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- (repeat nRepeat ( X* k/ d; t* g2 v- f9 Q" ~# I
- (repeat lr 0 m0 l2 C$ g) `3 J7 l. J
- (setq tp (polar cntPoint (setq angle (+ angle aGrw))
4 k: c$ d9 L6 A - (setq distnc (+ distnc dhGrw))
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- (if bvfac# Z& P+ ]. i, f# {3 w
- (setq tp (list (car tp) (cadr tp) (+ dv (caddr tp)))4 H- @- L1 y9 N) m4 _: E
- dv (+ dv dvGrw): f$ g! ?& f2 O+ U) d' X
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6 [* z- r7 H0 ~( } - (command tp) ; 继续输入下一点# j( K% S' U6 l. S. z
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" N! d- i* t; v - (command "") ; 输入结束
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* s( _. s4 w s X9 I; l. F - ;;; 生成三维弹簧函数调用接口
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4 e1 ]. A2 {/ @! A- (defun C:3DSPRING (/ olderror cmdch blpmd cntPt RottCnt horiGrw vertGrw bgnRdtn ptCntPerCircle)
3 m5 U8 Z) m. t: `# v( A; | - (setq cmdch (getvar "cmdecho")) ; 获取cmdecho值,以便调用结束后恢复
/ |" C# H/ j E: P' d+ o - (setq blpmd (getvar "blipmode")) ; 获取blipmode值,以便调用结束后恢复
) R6 Z% u+ v# c - (setvar "cmdecho" 0) ; 关闭 cmdecho , o& W: C, J: E- ]8 |' }8 J: s6 U
- (initget 1) ; cntPt 必须非空+ y& ^ L7 x* y
- (setq cntPt (getpoint ", \# G% p2 W0 V$ }2 h" F
- 请输入底部中心点: "))0 u+ \/ A' Q7 ^: ~/ l& H
- (initget 7) ; RottCnt 必须非零、非空,不可忽略+ Q# H" i3 ^$ V( T7 y' j1 e
- (setq RottCnt (getint "/ u& a/ T: G; K. p6 `+ H
- 旋转的圈数: "))
% `1 v/ r0 h! N1 T, t4 e - (initget 7) ; bgnRdtn 必须非零、非空,不可忽略2 Q0 `# w! I- v4 w* C
- (setq bgnRdtn (getdist cntPt "
' j3 @: z2 F; p4 @5 c - 起始半径: "))
& J1 B& L- r8 C; h - (initget 1) ; cf 必须非零、非空
$ C) M* b/ s; f! K* ^ - (setq horiGrw (getdist ") W- ~3 d5 M( f. Z
- 每一圈的水平增长距离: "))3 O# M Y1 h- E" F: `1 N
- (initget 3) ; cf 必须非零、非空6 M. {0 T) R2 e! C
- (setq vertGrw (getdist "
# L+ ?+ K- f* T. f- q( z - 每一圈的垂直增长距离: "))
( R' _# G% ~7 I2 }0 } - (initget 6) ; ptCntPerCircle 必须非零、不可忽略
/ Q7 C$ W, o" O& S/ b8 z% D - (setq ptCntPerCircle (getint "
9 m# e0 R S! `/ @ t/ j - 每一圈的插值点数<35>: "))$ d3 T" u, c; D8 ]7 S; C
- (cond ((null ptCntPerCircle) (setq ptCntPerCircle 35)))
: a' e) x' W. X5 J N" f% g- H - (spring RottCnt cntPt horiGrw ptCntPerCircle bgnRdtn vertGrw)- n& U# C7 I5 r! p Q
- (setvar "cmdecho" cmdch) ; 恢复调用前的cmdecho系统变量值
% I$ L4 {3 G1 v6 `8 @+ ~0 f1 V* y - (setvar "blipmode" blpmd) ; 恢复调用前的blipmode系统变量值7 M/ ?7 k% a, a7 t8 A- @* }
- (setq *error* olderror) ; Restore old *error* handler
$ L" G0 E+ T, F, j - (princ)
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