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分享一个AUTOCAD渐开线画法小程序:1 g& i1 g8 V) M7 e8 s
% E" U% P$ y, ^9 n! z Sub jkx()7 ~7 j7 L" g/ a9 h
Rem 绘制渐开线,6 z7 H# {. f( |# |1 _2 Q, Q8 q
Dim d As Double '节圆直径7 ?3 _2 z4 t% @7 H" `) h5 |
Dim r As Double '节圆半径' d6 ^+ ~5 d8 ~
Dim A As Double '总展开角度8 r% O5 Y: q" I- m6 b
Dim Ai As Double '展开角度* O1 D7 e: l! y& q: F
Dim Li As Double '展开弧长
+ W' E U" j9 a' I d = 100& o3 U, d& T6 O5 G
A = 360; s h$ C& J; H# L& t/ D
r = d / 2
- a1 d1 t3 i% ^& q/ h# x Dim Pnt1(2) As Double+ t, a$ T6 h; C( p2 Y
Dim Pnt2(2) As Double
. N$ U& B b4 W& F9 K Dim PntLst() As Double, N As Integer/ ]5 Q1 Y% t" M% K
ThisDrawing.ModelSpace.AddCircle Pnt1, r
' i2 q$ i$ X4 Q- W, b; q+ H9 G For Ai = 0 To A * Atn(1) / 45# Step Atn(1) / 45#
1 \6 c2 K0 A! h. E) L" a& [ Li = r * Ai1 ~2 [' ?3 F5 ~
Pnt1(0) = r * Sin(Ai)
/ Y1 p. `7 Q; `) J2 m Pnt1(1) = r * Cos(Ai)/ g2 \$ \: I4 i2 ~5 f) n2 T0 c$ C
Pnt2(0) = Pnt1(0) - Li * Cos(-Ai)
5 ~+ R* Z' a0 p* K% U# y! y, p Pnt2(1) = Pnt1(1) - Li * Sin(-Ai)
) P3 ^* u! Q/ P/ W8 j ThisDrawing.ModelSpace.AddLine Pnt1, Pnt2
! a( {7 A( b( n% Y# P N = N + 1" ?% c/ Y4 x" J* p% ?7 z
ReDim Preserve PntLst(N * 2 - 1) f2 m0 q! s0 d4 S# k
PntLst(N * 2 - 2) = Pnt2(0)
5 A7 B1 h$ p( N PntLst(N * 2 - 1) = Pnt2(1); K1 ~; c' Y3 h# C7 H! p6 q2 ^. H7 u
Next( y4 H. k* p1 C8 E: l
If N > 1 Then
5 f, Z4 k" H5 W ThisDrawing.ModelSpace.AddLightWeightPolyline PntLst. L8 }0 h, W* x1 H4 v6 P
End If
% t9 S+ Q2 w9 Q) q. S1 J3 ?+ E0 NEnd Sub
; v' u* z; }4 x6 \# v
4 P; ^5 b: ?- r1.进入菜单:工具>宏>visual Basic编辑器;
; s+ t$ |+ K6 I% W, O2.在编辑器中选菜单:插入>模块;+ h; B6 C3 J1 }1 o0 J
3.把这部分程序拷贝到（代码）窗口中;
" X: A% V' M2 W" t: u6 U2 s4.选择菜单：运行>运行子过程用户窗体;
; v! Z# a0 ]1 b5.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
