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分享一个AUTOCAD渐开线画法小程序:
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Sub jkx()
' e$ K+ b5 M* } Rem 绘制渐开线,
7 i/ |2 O3 v' J3 c, p0 q+ c Dim d As Double '节圆直径" u& w7 }+ {' N7 w7 S
Dim r As Double '节圆半径
6 N: S/ z, m7 v- C5 X3 m Dim A As Double '总展开角度
1 e( q1 _; N9 v% Y$ c/ ] Dim Ai As Double '展开角度
3 j% z' m! i! I# |$ f( Y$ S- h5 Y1 a Dim Li As Double '展开弧长. F6 |9 r7 |) o2 g! w2 D" T2 o5 B
d = 100$ F+ @. G% b# `0 a" t6 c& l
A = 360
) H) g0 w: v9 ?. L/ Y1 K r = d / 2! ^& H0 M. v4 c
Dim Pnt1(2) As Double
# [6 o8 o# P7 R: r0 M1 n, D" Z2 g Dim Pnt2(2) As Double& ]2 @/ k7 J$ f3 a
Dim PntLst() As Double, N As Integer
" M, }- f! N9 d: @- f& h ThisDrawing.ModelSpace.AddCircle Pnt1, r8 P- L% P5 e: h; f# h/ k3 R
For Ai = 0 To A * Atn(1) / 45# Step Atn(1) / 45#! [* K* E- _* D& K: G
Li = r * Ai% e6 z+ }, k: y6 v! A3 y
Pnt1(0) = r * Sin(Ai)
- j, d3 i( f: w4 { Pnt1(1) = r * Cos(Ai)4 T8 {9 f0 c% j+ h- t
Pnt2(0) = Pnt1(0) - Li * Cos(-Ai)
3 L4 U3 ?1 D$ }4 _9 k1 y5 m Pnt2(1) = Pnt1(1) - Li * Sin(-Ai)! c8 j4 x1 r/ E: s* ^- v
ThisDrawing.ModelSpace.AddLine Pnt1, Pnt27 ?5 P! z8 f) z7 ~5 {- r4 @
N = N + 1. i4 T6 M/ ] L9 }9 U0 V7 x
ReDim Preserve PntLst(N * 2 - 1)
8 ~9 D% ?! ]6 k9 c7 r PntLst(N * 2 - 2) = Pnt2(0)
/ O j8 ~& s3 \ PntLst(N * 2 - 1) = Pnt2(1)
: }4 }' z8 v0 a( [ Next
) c0 |( C8 h$ A7 f If N > 1 Then
8 D# A7 b3 I, r! L7 m$ A/ p* f ThisDrawing.ModelSpace.AddLightWeightPolyline PntLst7 S; b2 e1 W0 t- |
End If& |5 M9 {9 E# E, T& T* K5 B
End Sub: U' k3 ~- N6 O- b& Z* [
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1.进入菜单:工具>宏>visual Basic编辑器;, V, b3 k* X9 J6 {" K- O. y
2.在编辑器中选菜单:插入>模块; Q3 P( a; J& w( g) B/ _' g1 W: i* L
3.把这部分程序拷贝到（代码）窗口中;
! Q& F6 o: D! n$ e4.选择菜单：运行>运行子过程用户窗体;7 Y7 @/ o# H; }) t, M
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
