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分享一个AUTOCAD渐开线画法小程序:( T+ D) u4 M5 l- i
; I3 c, a9 t0 y J% J& h Sub jkx()
' d" F3 D& h( M, M: P/ K7 H# }/ k' n Rem 绘制渐开线,
- F8 k4 c/ a( O8 d P! Y8 @% q Dim d As Double '节圆直径6 a; N9 X) Q O1 m- z# V% P
Dim r As Double '节圆半径
: x/ d" Y) i/ m! @ Dim A As Double '总展开角度
8 ?" h$ R4 k6 X+ \' a1 }# x Dim Ai As Double '展开角度. g3 _" G" B! n& N
Dim Li As Double '展开弧长
. ~" t; ~6 a! w2 h+ J7 c d = 1008 W& Z& Y% C& a) w" U7 p8 u
A = 3604 w, W, r- e1 L9 E; Y
r = d / 2
h: \* n4 L9 O# R1 ? Dim Pnt1(2) As Double" A( b/ e. ]: K* Y
Dim Pnt2(2) As Double
) r0 _( p2 J- k- r" Q Dim PntLst() As Double, N As Integer9 b S/ C. S7 H+ d
ThisDrawing.ModelSpace.AddCircle Pnt1, r6 S+ T! ]+ D2 E" x- G) j2 c
For Ai = 0 To A * Atn(1) / 45# Step Atn(1) / 45#
6 f# E* h8 r" b! [+ Y, F0 n Li = r * Ai* U% V. ^& B, K4 \: ~
Pnt1(0) = r * Sin(Ai)
2 H# ]* k x" J! ]7 u Pnt1(1) = r * Cos(Ai)
) A8 Z* F( H6 C3 ?' x! x" T Pnt2(0) = Pnt1(0) - Li * Cos(-Ai)
, A5 W3 @$ E# O Pnt2(1) = Pnt1(1) - Li * Sin(-Ai)! r& S( c4 u" K+ _% a3 j
ThisDrawing.ModelSpace.AddLine Pnt1, Pnt2
0 k3 y) b) ^# w: S0 E/ r N = N + 12 r# \* s$ M3 B
ReDim Preserve PntLst(N * 2 - 1)8 M" A1 U8 Z) e) b: q5 B
PntLst(N * 2 - 2) = Pnt2(0)
+ i# a; I4 V; M! i: V3 o% q PntLst(N * 2 - 1) = Pnt2(1)
# H. J( M) U. u- ?" d Next
. _0 F- L! r0 X! s' ? If N > 1 Then5 Y- H6 [9 v5 m' }! g7 E% h
ThisDrawing.ModelSpace.AddLightWeightPolyline PntLst
6 q- q0 H- ]3 N* |" G, | End If( y/ u2 g- v) ~) a
End Sub) w! B5 K' H- ] `
R) U2 N4 M! M+ D3 g; e1.进入菜单:工具>宏>visual Basic编辑器;3 F5 h `( {, M& c3 a5 |. l% n9 g
2.在编辑器中选菜单:插入>模块;
9 |. \. B, b1 r# I3.把这部分程序拷贝到（代码）窗口中;% q" I" }$ O y1 [ Y* V5 W
4.选择菜单：运行>运行子过程用户窗体;
% w ]# p- f* j: B9 [ E7 D1 O5.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
