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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
1 ?# N/ }+ j$ w+ S+ f" q - ; 例如用户按下了CTRL + C
+ L- [& \; f+ g+ n' U - (if (/= s "Function cancelled")
8 _3 j) b5 K6 j* X% r - (princ (strcat "
- m$ _5 u) s! W3 M4 P - Error: " s))( @4 W4 H7 f& e; D i$ d1 S, c0 w
- )
( j9 t! f2 \" L7 X: o( m( W - (setvar "cmdecho" cmdch) ; 恢复调用前的cmdecho系统变量值
! k+ G7 \, X5 Y$ j" h - (setvar "blipmode" blpmd) ; 恢复调用前的blipmode系统变量值 H* X, `! f% s/ `0 W9 s% c
- (setq *error* olderror) ; 恢复旧的错误处理$ `8 e( S. X1 Q7 h1 R3 O
- (princ)
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- (defun spring (nRepeat cntPoint bhfac lr strad bvfac
2 P) y5 @0 Q- ~; n [5 F# c - / angle distnc tp aGrw dhGrw dvGrw Pi2 dv)' `1 m' f; a8 J. X
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- (setvar "blipmode" 0) ; 关闭 blipmode
8 U4 h6 {) V, T, t - (setvar "cmdecho" 0) ; 关闭 cmdecho
& [9 f: q% r+ t7 Q" N( w& s - (setq Pi2 (* 3.14159265 2))- ~2 `6 r4 s& G1 J
- (setq aGrw (/ Pi2 lr))
: m$ h: f; i3 G& r. `7 Q+ j* R - (setq dhGrw (/ bhfac lr))
6 g7 Z3 Q! U* C) \9 J - (if bvfac (setq dvGrw (/ bvfac lr)))* O' g* h F0 _7 N
- (setq angle 0.0)
2 d2 a. M0 P0 q/ k( P+ F - (if bvfac: n5 ?$ h& g* z# } N% i
- (setq distnc strad dv 0.0)
, b" y. F) P, D* [0 z - (setq distnc 0.0)% e8 h8 E; H3 p2 f" c% ^
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' \. z4 \ _# R* O R' |1 ^ - (if bvfac
4 N, v* P; b5 i2 r5 L' l6 A& e - (command "3dpoly") ; 开始绘制弹簧
, l1 K( Z$ z- D( c - (command "pline" cntPoint) ; 从基点开始绘制弹簧
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- (repeat nRepeat 2 A6 G ?) N# ]3 [) [) _% y
- (repeat lr 9 p d7 z/ |9 W, f# E1 t W0 z
- (setq tp (polar cntPoint (setq angle (+ angle aGrw))
4 t4 d2 |( B# l. a+ P, M - (setq distnc (+ distnc dhGrw))
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- (if bvfac O V& v: R) q0 ^. A8 T
- (setq tp (list (car tp) (cadr tp) (+ dv (caddr tp)))
6 W, K7 r. @3 F - dv (+ dv dvGrw)7 T( v0 g H# |1 l" D8 j
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- (command tp) ; 继续输入下一点) C$ O7 ]4 f* \4 D! K3 e
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- (command "") ; 输入结束& J6 ~* s8 T5 a- V0 I
- (princ)
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1 R% G7 a3 K* P* R. y! v- ;;;
+ B, d, s1 l6 M" x2 Q - ;;; 生成三维弹簧函数调用接口) s8 K1 U" B& L( ^
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- (defun C:3DSPRING (/ olderror cmdch blpmd cntPt RottCnt horiGrw vertGrw bgnRdtn ptCntPerCircle) 8 P: O# x; |5 v* y
- (setq cmdch (getvar "cmdecho")) ; 获取cmdecho值,以便调用结束后恢复
- O' F% ~) _( n H) F8 F: C# k - (setq blpmd (getvar "blipmode")) ; 获取blipmode值,以便调用结束后恢复
i: n- r; B5 S - (setvar "cmdecho" 0) ; 关闭 cmdecho
# x$ A6 b# ~( L5 P# ^ - (initget 1) ; cntPt 必须非空5 t i- I* k( R m: s9 r7 [
- (setq cntPt (getpoint "8 V' L* Q9 T; V* T0 S
- 请输入底部中心点: "))* Y, o8 [; H4 _3 X3 I- k
- (initget 7) ; RottCnt 必须非零、非空,不可忽略1 b8 @* D+ T4 N$ G
- (setq RottCnt (getint "
* d' S! E, l1 A; ]# m# ~, ] - 旋转的圈数: "))9 W9 d3 ]1 d+ }1 ]
- (initget 7) ; bgnRdtn 必须非零、非空,不可忽略 }2 j& I5 c3 v! x8 }
- (setq bgnRdtn (getdist cntPt "
5 L* _" w% o7 r; C, a - 起始半径: "))/ y# w# z4 @) C/ y
- (initget 1) ; cf 必须非零、非空
3 _2 B. q0 ^3 q - (setq horiGrw (getdist "
6 e3 Y$ |% P, h - 每一圈的水平增长距离: "))
2 L1 X% V6 Z5 Y% r5 h6 [0 u - (initget 3) ; cf 必须非零、非空
- ^7 b- g. R+ ?+ w0 i, U - (setq vertGrw (getdist "
! I/ e) |$ N- K - 每一圈的垂直增长距离: "))8 N u; F' x; R) w7 d( _5 f; i2 y. E8 Z
- (initget 6) ; ptCntPerCircle 必须非零、不可忽略
- q9 X; ^% b! B7 N, Y% h& C - (setq ptCntPerCircle (getint "- A2 \$ d" y5 w% ~- H4 M
- 每一圈的插值点数<35>: "))
! N1 _" p0 ]" q3 V0 N) N9 { - (cond ((null ptCntPerCircle) (setq ptCntPerCircle 35)))
# f# Z6 |% O' H& w) r - (spring RottCnt cntPt horiGrw ptCntPerCircle bgnRdtn vertGrw)5 y9 V0 r) i! K8 n. q
- (setvar "cmdecho" cmdch) ; 恢复调用前的cmdecho系统变量值
" b' A$ D1 B" Y - (setvar "blipmode" blpmd) ; 恢复调用前的blipmode系统变量值# E m( k7 O0 l2 K3 ^
- (setq *error* olderror) ; Restore old *error* handler; P8 S8 D3 n, H9 z$ ?& E8 l; c
- (princ)' `( G4 r! U2 o, `4 h% g& l( c/ \
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