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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 ) S# L0 h X; R2 T9 q) s
- ; 例如用户按下了CTRL + C+ P& \! b* q. g; H1 }
- (if (/= s "Function cancelled")
, B# h6 T! y+ B# |5 \' x - (princ (strcat "3 l, i% s: e2 t l, }
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5 A" Z5 G, e+ n6 l/ `* Q - (setvar "cmdecho" cmdch) ; 恢复调用前的cmdecho系统变量值
% ?! w. m, ?, s& j/ ] - (setvar "blipmode" blpmd) ; 恢复调用前的blipmode系统变量值
9 h H/ F7 W/ O1 s - (setq *error* olderror) ; 恢复旧的错误处理$ M" `8 c. y w8 D0 o4 N7 R
- (princ)
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- (defun spring (nRepeat cntPoint bhfac lr strad bvfac8 r/ w' m k6 {1 F4 A3 j+ U
- / angle distnc tp aGrw dhGrw dvGrw Pi2 dv)
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6 d8 _! C* O1 Q- (setvar "blipmode" 0) ; 关闭 blipmode % r. q. S* P" l# l) i& a" _
- (setvar "cmdecho" 0) ; 关闭 cmdecho
: B8 Y; W' Q$ I. y- @! l! b- \* } - (setq Pi2 (* 3.14159265 2))+ e- y$ p3 _' k0 f" r8 b- R
- (setq aGrw (/ Pi2 lr))
) j$ k8 C/ ^' B# Y - (setq dhGrw (/ bhfac lr))
# r& M. ~6 R7 A - (if bvfac (setq dvGrw (/ bvfac lr)))- Y0 P3 @ n4 O% B4 R! J
- (setq angle 0.0)
3 E* G' _, ~; v) `1 l - (if bvfac+ q3 v- L- A0 i' A6 ~: [& U
- (setq distnc strad dv 0.0)
6 I. a9 |( y4 | - (setq distnc 0.0)
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- (if bvfac
6 {. \* ^% Q8 W# J& i9 k - (command "3dpoly") ; 开始绘制弹簧
5 N9 C" |( j# w8 e9 ?; o - (command "pline" cntPoint) ; 从基点开始绘制弹簧7 ~+ E9 C; q) F# ^ Y& k4 e
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- (repeat nRepeat - b2 j0 a; a4 U7 C6 n6 X
- (repeat lr # q+ h4 K, Z) J4 Q, ^6 p
- (setq tp (polar cntPoint (setq angle (+ angle aGrw)) E% S4 p$ u* d$ r
- (setq distnc (+ distnc dhGrw))
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- (if bvfac
* ?1 r5 r9 t2 w - (setq tp (list (car tp) (cadr tp) (+ dv (caddr tp)))& ^* H5 ?( Q" j4 R3 K6 ]
- dv (+ dv dvGrw)
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' F7 `: Z9 m" P) @* j, h - (command tp) ; 继续输入下一点* s: a/ q# W- C) U' S* D1 S: B
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* ~( M) y: ]2 o" q; W" Y - (command "") ; 输入结束
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- ;;;
7 `( r7 |/ x9 c' L4 h1 e& v- }+ X - ;;; 生成三维弹簧函数调用接口
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- ; T# V8 j' J1 c0 }
- (defun C:3DSPRING (/ olderror cmdch blpmd cntPt RottCnt horiGrw vertGrw bgnRdtn ptCntPerCircle)
+ ~! C9 U6 y3 n# p. M. f - (setq cmdch (getvar "cmdecho")) ; 获取cmdecho值,以便调用结束后恢复
, T& x8 c# k# F# T - (setq blpmd (getvar "blipmode")) ; 获取blipmode值,以便调用结束后恢复
6 ]7 c9 ^" n$ y2 D: `( Q - (setvar "cmdecho" 0) ; 关闭 cmdecho
7 j3 E& L, \0 q- ~1 j1 a - (initget 1) ; cntPt 必须非空
' Y" \- S o3 w - (setq cntPt (getpoint "1 Q6 w4 }5 D. U( J: G B
- 请输入底部中心点: "))
" H! @+ e* D% d( e, c - (initget 7) ; RottCnt 必须非零、非空,不可忽略7 ^+ r# l+ u. J, g) C
- (setq RottCnt (getint "
) M( q; X( g9 e* F$ J1 D: k# v - 旋转的圈数: "))
1 x; M: h( d; k1 m, D" x$ s$ k+ U& ^ - (initget 7) ; bgnRdtn 必须非零、非空,不可忽略
' u& C" E6 c+ z/ U! z& k( V - (setq bgnRdtn (getdist cntPt "
7 t- G6 B3 {7 h# Y# w) y9 y - 起始半径: "))# i. t% x" y, {
- (initget 1) ; cf 必须非零、非空& H/ s6 i7 J' L( W# |
- (setq horiGrw (getdist "
) Y/ N1 I$ A* G- |- x% D$ D - 每一圈的水平增长距离: "))- | J& H, ]/ U% f' ^. G
- (initget 3) ; cf 必须非零、非空
/ @8 l! ?: k/ g; }) R4 L/ C - (setq vertGrw (getdist "1 c- J* G, b# k" g9 T) r
- 每一圈的垂直增长距离: "))4 Y" ~5 I! C3 |( s6 H- G
- (initget 6) ; ptCntPerCircle 必须非零、不可忽略
2 z; K1 ?# ]) [* w/ g - (setq ptCntPerCircle (getint "4 Y$ }% y/ f4 @- V) x$ ^
- 每一圈的插值点数<35>: ")), b% A: R8 `7 W
- (cond ((null ptCntPerCircle) (setq ptCntPerCircle 35)))
% {0 d. v/ I. W7 E - (spring RottCnt cntPt horiGrw ptCntPerCircle bgnRdtn vertGrw)
2 B1 s# ^% X# p' V7 ]9 J - (setvar "cmdecho" cmdch) ; 恢复调用前的cmdecho系统变量值9 z8 \* W c2 u. |: @6 Q H* j8 j9 k
- (setvar "blipmode" blpmd) ; 恢复调用前的blipmode系统变量值
+ D8 g% T, I: Y. I! w- D - (setq *error* olderror) ; Restore old *error* handler: ?' a5 c, `9 N! I$ e' T( N9 j
- (princ)
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