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分享一个AUTOCAD渐开线画法小程序:
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Sub jkx()' Y& i& Q0 `7 N1 }0 V0 D$ A+ X" i9 D
Rem 绘制渐开线,
7 V5 Y9 F! t1 O) e/ b Dim d As Double '节圆直径" }/ P% z) c+ ^$ c3 F& h
Dim r As Double '节圆半径
2 F( h) _ S# N7 s& {2 g Dim A As Double '总展开角度. f3 d k7 e8 ]* o, _
Dim Ai As Double '展开角度
' ~& C8 i, B+ E5 K! R$ ?; K Dim Li As Double '展开弧长 f+ x0 `, F; ?9 @8 e$ U) @
d = 1004 j- W4 U2 q) G6 U$ {0 ^
A = 360
9 S9 r( T7 K5 x8 L% V" K. [# Z/ L r = d / 2
+ K$ D& G) c5 K* E; ]* ^# b Dim Pnt1(2) As Double+ r: `$ y F- j& k/ ?9 m: c
Dim Pnt2(2) As Double
7 _- ?, g% e* [ Dim PntLst() As Double, N As Integer2 e& `' I, C2 ~3 x( f% R9 V
ThisDrawing.ModelSpace.AddCircle Pnt1, r3 |6 ^# V$ g( n* @
For Ai = 0 To A * Atn(1) / 45# Step Atn(1) / 45#- A/ A. C4 ]% U0 `& C! ^
Li = r * Ai
% b8 |- _1 q5 R8 }7 S2 k/ e Pnt1(0) = r * Sin(Ai)0 c6 y9 W+ i% }* d
Pnt1(1) = r * Cos(Ai)
1 Q7 h% s7 u; U3 v+ v) h Pnt2(0) = Pnt1(0) - Li * Cos(-Ai) C3 R, ~! _8 F- q
Pnt2(1) = Pnt1(1) - Li * Sin(-Ai)
# a4 q5 A. H9 T# p; {& x ThisDrawing.ModelSpace.AddLine Pnt1, Pnt2* p$ u8 Z4 [, K3 q$ Q
N = N + 1+ P8 Z( {1 X$ D; ]) C& W, N
ReDim Preserve PntLst(N * 2 - 1)
" H& {% C6 O0 a: q: G PntLst(N * 2 - 2) = Pnt2(0)( f, N* \9 g4 z3 P/ \0 K
PntLst(N * 2 - 1) = Pnt2(1)
; D+ y) N6 G: U Next
3 [) F) q' D/ S" }# C* u If N > 1 Then% ~ S) A% V8 _3 n7 T
ThisDrawing.ModelSpace.AddLightWeightPolyline PntLst
, G. `: k. F* r+ y/ }" f- E+ R, W3 \ End If
$ H8 D, a7 o; E+ nEnd Sub- X) f6 |$ e0 {/ Z
9 @0 }( N' M: R" @1.进入菜单:工具>宏>visual Basic编辑器;
* ~+ d- F+ k2 C2.在编辑器中选菜单:插入>模块;- [2 y5 D$ }( I, H3 i
3.把这部分程序拷贝到（代码）窗口中;3 F6 w6 N1 R8 W8 X
4.选择菜单：运行>运行子过程用户窗体;6 A. y# c) `2 \$ h
5.在AutoAcad绘图界面中可以看到结果. |
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发表于 2008-1-30 21:58
