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(defun errMsg (s) ; 当命令执行时出现错误 + Y4 N& \$ r% p6 I
; 例如用户按下了CTRL + C5 J. a# J0 n* g0 }2 @ x7 l8 h# s
(if (/= s "Function cancelled")
* ^$ w( x0 g- {! p5 ]$ @4 {; O (princ (strcat "\nError: " s))
6 i% |9 R$ W# g2 y# y) f) r )) d6 U7 J4 Z6 W0 A. d5 H; H
(setvar "cmdecho" cmdch) ; 恢复调用前的cmdecho系统变量值/ |* D6 ~- c' p, ^: S
(setvar "blipmode" blpmd) ; 恢复调用前的blipmode系统变量值
1 A. R, l# r' K$ @/ q4 E5 ` (setq *error* olderror) ; 恢复旧的错误处理( L+ c9 ] \! J7 `0 a1 E- u
(princ): G" E u4 X& S$ o' H& o7 Y
)/ V! j- _6 I9 Z( p* J: u& q/ k; B
(defun spring (nRepeat cntPoint bhfac lr strad bvfac
& l3 s, P0 g2 f ^' H' W / angle distnc tp aGrw dhGrw dvGrw Pi2 dv)
: D% U! C4 H1 g; }* N (setvar "blipmode" 0) ; 关闭 blipmode 3 ~" ~4 J0 C+ `1 g: Y i
(setvar "cmdecho" 0) ; 关闭 cmdecho) v. @0 W* |+ J A# \
(setq Pi2 (* 3.14159265 2))
* T! ?7 w! m5 Z6 ]2 O+ f5 d (setq aGrw (/ Pi2 lr)) k* J1 M* k& y( D0 b! C4 H( U
(setq dhGrw (/ bhfac lr)) C+ {" h! J5 n6 x
(if bvfac (setq dvGrw (/ bvfac lr)))
* Z/ W6 T1 R3 |& b2 N (setq angle 0.0): C' S/ p/ q9 ^9 Q& E6 `; A) F
(if bvfac
, j# ?" g/ T; N" I( d* N# @ (setq distnc strad dv 0.0)
& I* K3 {8 }! o5 C) h! N9 q& Y (setq distnc 0.0), I4 v+ F' l( o- R
)
. o; \! R; U8 K. l (if bvfac 3 q" @. u3 b6 }+ B7 W2 d
(command "3dpoly") ; 开始绘制弹簧
( e& [* u. y; v (command "pline" cntPoint) ; 从基点开始绘制弹簧
* q- O# Y8 M, N7 ` )
: J+ M( T. q0 H, R6 f8 N5 V (repeat nRepeat
! d6 l' d; D3 A0 c9 J. x (repeat lr 8 h: p( H- z5 X: W& A0 K
(setq tp (polar cntPoint (setq angle (+ angle aGrw))8 p, u- R. y% I* f* e
(setq distnc (+ distnc dhGrw))
" j: V& G/ s/ |3 ` )
' }+ n- O; L, y9 x3 H6 | )5 s3 {/ K" ^4 V; ~+ p0 R
(if bvfac
1 Q2 H, [3 a# k& j) y. F- \ (setq tp (list (car tp) (cadr tp) (+ dv (caddr tp)))$ v; D/ J' r$ J7 E' `
dv (+ dv dvGrw)
0 w, i3 }) z( B2 K3 p; d )
/ B, `+ {3 `/ P# U( O2 f I )+ w6 _7 T$ }- k4 R/ ~" I0 n% `
(command tp) ; 继续输入下一点 K& R. H8 [( l: G; M
)
+ D$ v( ]2 H4 @ ) 6 E4 _& N$ {& y2 f0 F
(command "") ; 输入结束
4 W. i1 |4 D& d8 i! W* Z (princ)( j. t( I/ p+ h8 Q( j# l5 L
) # q$ Z* J* h1 W& W4 f
;;;7 c% D6 u0 Z+ {4 P4 L( ]# N1 U; c
;;; 生成三维弹簧函数调用接口& U1 {; \3 m3 N
;;;) g$ D9 h+ A" v) Z; `
(defun C:3DSPRING (/ olderror cmdch blpmd cntPt RottCnt horiGrw vertGrw bgnRdtn ptCntPerCircle)
5 v3 O0 h ?" M3 y/ l a ]2 z* ^ m (setq cmdch (getvar "cmdecho")) ; 获取cmdecho值，以便调用结束后恢复
: s$ n m0 d6 {3 T (setq blpmd (getvar "blipmode")) ; 获取blipmode值，以便调用结束后恢复
$ i/ U- W5 L/ N (setvar "cmdecho" 0) ; 关闭 cmdecho ( _' P) X6 \& W$ _1 f3 H
(initget 1) ; cntPt 必须非空
* h8 L# D7 Y/ l- f+ z (setq cntPt (getpoint "\n请输入底部中心点: "))* K/ V$ ?' x$ h9 a6 g
(initget 7) ; RottCnt 必须非零、非空,不可忽略
5 @; c9 h, ]9 H, f (setq RottCnt (getint "\n旋转的圈数: "))
7 q! s+ W: a6 n3 r, R: ^ (initget 7) ; bgnRdtn 必须非零、非空,不可忽略
9 H2 D: S) k( t. j8 ^$ c( D* e$ A/ B (setq bgnRdtn (getdist cntPt "\n起始半径: "))) z* t6 b1 i; p* r3 q7 [7 V7 @# q) b
(initget 1) ; cf 必须非零、非空
& A' r* v# u; j+ D+ \* V (setq horiGrw (getdist "\n每一圈的水平增长距离: "))
1 t2 t0 ~5 v- A7 G (initget 3) ; cf 必须非零、非空
3 W& p0 h; Z, o7 P8 O (setq vertGrw (getdist "\n每一圈的垂直增长距离: "))- ~4 P- }( |1 c
(initget 6) ; ptCntPerCircle 必须非零、不可忽略) A1 r, u) ]7 z$ f6 c' h
(setq ptCntPerCircle (getint "\n每一圈的插值点数<35>: "))
* V( M* f' r$ N5 d( c! E (cond ((null ptCntPerCircle) (setq ptCntPerCircle 35))) ! p1 s, y+ J# S! |- I. G, B
(spring RottCnt cntPt horiGrw ptCntPerCircle bgnRdtn vertGrw)
# s, U2 r/ G6 L2 V (setvar "cmdecho" cmdch) ; 恢复调用前的cmdecho系统变量值
: ?$ Y3 M. y5 p5 _2 ~: ?$ ]! Y7 z1 H5 r (setvar "blipmode" blpmd) ; 恢复调用前的blipmode系统变量值" _7 `! T$ [5 n3 N7 B, A
(setq *error* olderror) ; Restore old *error* handler& C( d& Z) m' X6 d& p; Z; z
(princ)$ i8 `, l1 v' W! L g/ n$ `- I
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发表于 2007-2-27 20:32:35
