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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
+ A) u( A$ {! T* V0 @+ U - ; 例如用户按下了CTRL + C
0 x$ m( s7 g& H/ a: Z - (if (/= s "Function cancelled")8 {* V- i: m% G5 J7 ^, c
- (princ (strcat "
" Q) w5 `6 u+ z' F( { A- m" v - Error: " s))4 V1 r, o/ Q- O8 z+ {& v2 n
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- (setvar "cmdecho" cmdch) ; 恢复调用前的cmdecho系统变量值" Q1 i# k5 T2 s/ K6 w4 h) P
- (setvar "blipmode" blpmd) ; 恢复调用前的blipmode系统变量值- {$ Z$ m% Z" t4 L9 A
- (setq *error* olderror) ; 恢复旧的错误处理
~* M0 s. n- Q8 N' ?0 ~4 s+ |1 k3 i - (princ)* D, K% t/ R$ b" P
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$ v6 {; O1 z0 {$ i9 T! d0 O' n- (defun spring (nRepeat cntPoint bhfac lr strad bvfac$ V1 @( s7 ` |( c
- / angle distnc tp aGrw dhGrw dvGrw Pi2 dv)
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- (setvar "blipmode" 0) ; 关闭 blipmode ! M, q: s8 v. l C8 @ L
- (setvar "cmdecho" 0) ; 关闭 cmdecho
; \; L0 i2 H4 F0 h2 c; m% E - (setq Pi2 (* 3.14159265 2))
$ W" q# _! N/ W3 `: g( r- e. f( M - (setq aGrw (/ Pi2 lr))/ ?4 i8 x* x+ ] l" _/ ]6 [* Z
- (setq dhGrw (/ bhfac lr))
( T$ T- o- C- j9 o - (if bvfac (setq dvGrw (/ bvfac lr)))/ W+ _ b" ^9 k
- (setq angle 0.0)" ~8 F, \9 q( H' {; o
- (if bvfac9 k& I4 P8 E( H# w# c
- (setq distnc strad dv 0.0)
0 l: z9 @, \& p& \" j" J - (setq distnc 0.0)
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! [7 j. z( z8 ~4 l9 k9 J. E( O - (if bvfac
/ \2 \( a& c( ]7 N$ R8 G! Y" ?& H, G- f - (command "3dpoly") ; 开始绘制弹簧
2 l9 `' [+ B+ j8 E/ ^) r - (command "pline" cntPoint) ; 从基点开始绘制弹簧
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- (repeat nRepeat 8 |# V* n8 r; U3 v
- (repeat lr 1 r7 ]* G% W0 e4 f/ X: N
- (setq tp (polar cntPoint (setq angle (+ angle aGrw))
) }6 u9 M3 [- _: @ - (setq distnc (+ distnc dhGrw))
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- (if bvfac: ~# X1 D: L |; l. R" c% \: _% C
- (setq tp (list (car tp) (cadr tp) (+ dv (caddr tp))); _) E8 v. O# G/ R+ A
- dv (+ dv dvGrw)
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- (command tp) ; 继续输入下一点
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- (command "") ; 输入结束1 ^% a* z; a4 C
- (princ)3 s3 ?. [, _) O# {$ T
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; B+ m3 V. q3 N* q" M- ;;;
' b+ A7 q/ o$ `( h- s) i - ;;; 生成三维弹簧函数调用接口
% W* D# v% i% ?" o$ _& Y: n6 U - ;;;
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- (defun C:3DSPRING (/ olderror cmdch blpmd cntPt RottCnt horiGrw vertGrw bgnRdtn ptCntPerCircle) % y5 d0 |/ g0 V- d
- (setq cmdch (getvar "cmdecho")) ; 获取cmdecho值,以便调用结束后恢复8 z9 i: Z7 [" C6 h5 f n& @
- (setq blpmd (getvar "blipmode")) ; 获取blipmode值,以便调用结束后恢复
" k i0 X9 D9 }: R* M5 B1 h - (setvar "cmdecho" 0) ; 关闭 cmdecho 6 R; L' q1 K- v( ?
- (initget 1) ; cntPt 必须非空
" W; ^/ @4 H( K+ l$ N; O" W: j" [ - (setq cntPt (getpoint "
% j/ N- S. d6 e; p - 请输入底部中心点: "))
& H" f" K h" F- \) ?' [ - (initget 7) ; RottCnt 必须非零、非空,不可忽略5 K" M% x( c `) C% g
- (setq RottCnt (getint "
: g# ]6 V' Q0 Z b, o - 旋转的圈数: "))% ]' p4 L! D3 S6 p+ Z7 B+ x
- (initget 7) ; bgnRdtn 必须非零、非空,不可忽略
. W. h8 |5 u& Z L - (setq bgnRdtn (getdist cntPt "% X7 ^" P4 [+ ?" y! C
- 起始半径: "))
9 k9 P. ~# }7 |- U* n0 l$ P - (initget 1) ; cf 必须非零、非空
3 o1 r2 n" d) c% n4 g# Y2 z - (setq horiGrw (getdist "2 b) ]1 w- f( {) O
- 每一圈的水平增长距离: "))7 w) \; ^2 j$ O: s) O2 j
- (initget 3) ; cf 必须非零、非空5 [: \$ U4 M) V& t, w8 o
- (setq vertGrw (getdist "
2 ^/ L* d7 u l5 T. J' D3 y - 每一圈的垂直增长距离: "))0 o/ p5 }6 R- c8 A( o3 w6 N
- (initget 6) ; ptCntPerCircle 必须非零、不可忽略
* Q; [1 x# x9 J* c/ p) B - (setq ptCntPerCircle (getint "
6 c5 x5 R* G- t7 z4 p' w* o - 每一圈的插值点数<35>: "))
P/ B7 G' z3 Z3 t* u1 h+ ^5 i ~, { - (cond ((null ptCntPerCircle) (setq ptCntPerCircle 35))) ! ~# {: {% y+ Z+ j6 _
- (spring RottCnt cntPt horiGrw ptCntPerCircle bgnRdtn vertGrw)
& }5 @. D x$ \$ w) E - (setvar "cmdecho" cmdch) ; 恢复调用前的cmdecho系统变量值
# n9 l: ?/ y; T% v - (setvar "blipmode" blpmd) ; 恢复调用前的blipmode系统变量值
' _3 B1 ~# I0 l! [9 [ - (setq *error* olderror) ; Restore old *error* handler
9 x' K% \# ?# e5 L: w8 W - (princ)
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