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分享一个AUTOCAD渐开线画法小程序:2 @8 F+ E( _. }7 z
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Sub jkx()
4 D8 l4 k9 _3 z2 z# } Rem 绘制渐开线,9 h5 t" k9 `7 N! ]% S
Dim d As Double '节圆直径
$ z! D* a8 L4 g m W5 N' W6 J" } Dim r As Double '节圆半径, v# F3 R7 y N" ]% [( E
Dim A As Double '总展开角度/ L1 M: _; z6 m- c; H
Dim Ai As Double '展开角度
( f* Y$ w0 w" E2 { Dim Li As Double '展开弧长
/ j" i+ w8 ?1 `0 y M2 Q% a* e d = 1007 L/ C6 d' \- t* U
A = 360+ s2 ^$ v* Y$ C( p6 G" k- a
r = d / 2 |" J' e, ~. ]6 a6 [ M$ r
Dim Pnt1(2) As Double
% m$ e/ H4 d- b, l Dim Pnt2(2) As Double v$ r% u8 x9 Q
Dim PntLst() As Double, N As Integer
; S$ @' f: i* X7 ? ThisDrawing.ModelSpace.AddCircle Pnt1, r; u& M3 q n j D
For Ai = 0 To A * Atn(1) / 45# Step Atn(1) / 45#. Q+ L' F, I! Z% a( M
Li = r * Ai
. @" a0 {0 g% n' n Pnt1(0) = r * Sin(Ai)
$ M8 u0 i w. G4 g9 \ Pnt1(1) = r * Cos(Ai)# W* W! K5 L/ |& N5 C0 }, G2 N
Pnt2(0) = Pnt1(0) - Li * Cos(-Ai) X' T' H" d$ \: |
Pnt2(1) = Pnt1(1) - Li * Sin(-Ai)
; M; `- i. |1 c' v# ?7 z ThisDrawing.ModelSpace.AddLine Pnt1, Pnt2
a9 Y2 A" f, c3 ]6 ?" o. y N = N + 1
& ^: P, l$ H3 w N3 B/ p6 j! _ ReDim Preserve PntLst(N * 2 - 1)
, _! \" R5 ?1 ?- P2 ]( ?, f/ o PntLst(N * 2 - 2) = Pnt2(0)2 X9 b! u! H' }: a% i
PntLst(N * 2 - 1) = Pnt2(1)7 _# `/ V; E: o) i" B1 n9 ] p
Next
9 a, z- H/ C4 X5 t9 }- ~ If N > 1 Then
) |/ r; l& {& ~ ThisDrawing.ModelSpace.AddLightWeightPolyline PntLst. ^0 g5 C" _/ a K5 K5 v9 s
End If
3 \: ] y+ }! s: l: ]- k6 GEnd Sub
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. z' F5 h: i+ A9 z N: }0 `1.进入菜单:工具>宏>visual Basic编辑器;/ q$ P3 n2 L; k
2.在编辑器中选菜单:插入>模块;. u1 _% r. a( L" a4 k
3.把这部分程序拷贝到（代码）窗口中;: h/ R B/ I: U8 e; K9 j4 D
4.选择菜单：运行>运行子过程用户窗体;
6 p% `- Q) H- d, f: ~, h5.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
