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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 ' U. {- }/ D0 R
- ; 例如用户按下了CTRL + C; f6 r0 R6 L1 @' j0 b7 e
- (if (/= s "Function cancelled")# S2 X$ y0 |! _6 q( v; L
- (princ (strcat "
( `& r% @7 D3 v3 u - Error: " s))! k q* f9 w2 m4 P$ f7 E
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- (setvar "cmdecho" cmdch) ; 恢复调用前的cmdecho系统变量值
% G0 M l$ ], q8 l& o' ]8 o) ^4 c - (setvar "blipmode" blpmd) ; 恢复调用前的blipmode系统变量值
; @& p, O: H. `- Y7 J - (setq *error* olderror) ; 恢复旧的错误处理
$ \9 h* v) e( t. k T& l; q - (princ)
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t; `* f( s" Y1 h- (defun spring (nRepeat cntPoint bhfac lr strad bvfac
& t- w, P2 s# \; P7 M - / angle distnc tp aGrw dhGrw dvGrw Pi2 dv)4 T$ O7 p+ F h+ c
" A6 b( ~6 m k7 c- (setvar "blipmode" 0) ; 关闭 blipmode ( j* j; c! \9 O+ s& l
- (setvar "cmdecho" 0) ; 关闭 cmdecho$ f& y) Y& n* ?0 ?) X
- (setq Pi2 (* 3.14159265 2))' e5 a( _/ G% l, r m
- (setq aGrw (/ Pi2 lr))
/ _: n8 |% d2 S( D# H - (setq dhGrw (/ bhfac lr))5 C/ X6 V7 s' x% B
- (if bvfac (setq dvGrw (/ bvfac lr)))
6 b& `7 T) p: ?8 g8 ?' A' l# O, J- L4 r - (setq angle 0.0)
: c/ G# c) Y( [+ ?: z- |7 p - (if bvfac/ L3 Q I6 ?; i
- (setq distnc strad dv 0.0)! f5 d5 @$ O' {) i8 O6 N# }* F# F
- (setq distnc 0.0)! z. e. o. A, u5 H- V1 ^
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- (if bvfac $ e) ^8 F" u( n( ~. f
- (command "3dpoly") ; 开始绘制弹簧
7 @. r* e; \9 K$ P - (command "pline" cntPoint) ; 从基点开始绘制弹簧7 l+ M* X5 {; ^! Q$ S: h4 s
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9 N2 }8 w& c3 ^, i - (repeat nRepeat
9 o# e" H( t4 Y+ R6 x+ ^ - (repeat lr
* j& U) e. G# y2 ]* h" N - (setq tp (polar cntPoint (setq angle (+ angle aGrw))
! z3 g- S$ b* F6 O0 ?# X- f - (setq distnc (+ distnc dhGrw))$ C' R3 ^% B2 j: n' p) L
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- (if bvfac: p: r7 O2 M3 i% k, R" U2 H2 L
- (setq tp (list (car tp) (cadr tp) (+ dv (caddr tp)))3 a# z9 R3 |. s2 S
- dv (+ dv dvGrw)" c# @0 U! M; t! J
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- (command tp) ; 继续输入下一点
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& c4 Z1 R. A# Q# u, }8 _5 l - (command "") ; 输入结束
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- ;;; 生成三维弹簧函数调用接口
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- (defun C:3DSPRING (/ olderror cmdch blpmd cntPt RottCnt horiGrw vertGrw bgnRdtn ptCntPerCircle) $ C; ]7 Q4 u# c8 } q
- (setq cmdch (getvar "cmdecho")) ; 获取cmdecho值,以便调用结束后恢复
. [) ], h ]" o0 H2 ?1 V" h& H% F - (setq blpmd (getvar "blipmode")) ; 获取blipmode值,以便调用结束后恢复
2 B1 H! w/ S; c - (setvar "cmdecho" 0) ; 关闭 cmdecho & A# m: Z0 ^$ N5 g
- (initget 1) ; cntPt 必须非空7 i- W: E# A5 d I1 @
- (setq cntPt (getpoint "
Q( A' @, J5 X - 请输入底部中心点: "))( N* G0 y& E) g8 T. Q
- (initget 7) ; RottCnt 必须非零、非空,不可忽略8 b$ x- I9 c: Y5 F
- (setq RottCnt (getint "/ m; g( B7 ~, Z% B2 a4 \" Q/ y
- 旋转的圈数: "))& C# S& a/ ?+ {: v; i: x0 f* C' e* y( ^5 {
- (initget 7) ; bgnRdtn 必须非零、非空,不可忽略% e4 Y6 x6 @* [. C1 G& o7 B
- (setq bgnRdtn (getdist cntPt "6 |( K- h9 ~% k5 e! q0 D
- 起始半径: "))
3 @3 Y- z0 g: x) B# m - (initget 1) ; cf 必须非零、非空' t, s' K" x( y# F5 ?
- (setq horiGrw (getdist "
. J F4 Q( H+ @2 U. a2 y - 每一圈的水平增长距离: ")), i4 I& L% z3 I# J
- (initget 3) ; cf 必须非零、非空' Z F4 ~7 Y+ h, k
- (setq vertGrw (getdist "
! ]0 g* W! ?" g% j. m- y U - 每一圈的垂直增长距离: "))
6 J( z7 ?6 m z6 T - (initget 6) ; ptCntPerCircle 必须非零、不可忽略$ l2 I- J) H: @+ e3 |
- (setq ptCntPerCircle (getint "" [4 M7 p; Z+ [+ Z p3 a7 Q
- 每一圈的插值点数<35>: "))
/ Y. w: `' f* {: e3 B - (cond ((null ptCntPerCircle) (setq ptCntPerCircle 35)))
1 Y/ H" S& I1 X' z+ S, W) u; R - (spring RottCnt cntPt horiGrw ptCntPerCircle bgnRdtn vertGrw)8 S. @$ b5 m( V) ? L( V5 [
- (setvar "cmdecho" cmdch) ; 恢复调用前的cmdecho系统变量值6 A+ }( `/ f/ s3 ? A) j) e
- (setvar "blipmode" blpmd) ; 恢复调用前的blipmode系统变量值- M3 B0 V, B' Z9 n" W; b
- (setq *error* olderror) ; Restore old *error* handler
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