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分享一个AUTOCAD渐开线画法小程序:& b# X+ W* ^6 Y" s' M) A: n/ u
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Sub jkx()0 s: M" ^6 s# p/ n: f/ p5 m
Rem 绘制渐开线,
7 o. i7 [8 j# H6 r' V+ w Dim d As Double '节圆直径
) C/ |- X& m/ F. w M5 t+ E/ q5 H% w Dim r As Double '节圆半径
' u v+ ?1 j, q* n. C* Y5 a5 Z Dim A As Double '总展开角度
" ?& e, t( z) @/ _ Dim Ai As Double '展开角度
) e, {; e# J3 g( k8 ~! q( G* B Dim Li As Double '展开弧长, D6 I5 k# u! _8 c5 H
d = 100. t& f9 h+ k9 h0 T5 m
A = 360
4 S3 J* ~9 _3 N9 K r = d / 2
0 P, B) u9 a! X5 s& k) R Dim Pnt1(2) As Double1 E* h/ {& |: }4 I; R
Dim Pnt2(2) As Double- K$ E# n; u1 y3 y
Dim PntLst() As Double, N As Integer' ^+ }4 I4 J' K, i. s; |1 O: L
ThisDrawing.ModelSpace.AddCircle Pnt1, r6 N. |! b8 K0 e4 \$ Q
For Ai = 0 To A * Atn(1) / 45# Step Atn(1) / 45#) j/ D. f6 p/ R3 ]0 E9 ^5 w( d0 p+ ~
Li = r * Ai
0 u* t0 y( a' P0 p Pnt1(0) = r * Sin(Ai)
5 u+ R- ~ ]1 }7 a( D( c4 ^ Pnt1(1) = r * Cos(Ai)
9 N5 p6 q. Q7 l+ {: C+ v4 p7 } Pnt2(0) = Pnt1(0) - Li * Cos(-Ai)
1 W& T) w& m5 a( l+ N* T Pnt2(1) = Pnt1(1) - Li * Sin(-Ai)7 v n* s0 _( q
ThisDrawing.ModelSpace.AddLine Pnt1, Pnt21 s: h( M* r1 P8 R
N = N + 1
" J# O! ]) j; ~& Z4 _; K. Q ReDim Preserve PntLst(N * 2 - 1)
$ b5 q( ]7 m* ?- F) | PntLst(N * 2 - 2) = Pnt2(0)0 Q" D0 h; R6 }
PntLst(N * 2 - 1) = Pnt2(1)
, b* w. D, h1 F Next
' i/ E$ _: o8 }7 |5 w If N > 1 Then
& P, ]! D( S) }( Z4 E- } ThisDrawing.ModelSpace.AddLightWeightPolyline PntLst
b* ^) R8 q! b& a8 x- f0 X0 _ End If# N1 p \' e, z1 F6 o7 X
End Sub$ e4 H5 F# W7 z: s
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1.进入菜单:工具>宏>visual Basic编辑器;
! f z$ b; @ I4 q8 M/ |2.在编辑器中选菜单:插入>模块;
, @8 b: c+ |! N+ @# g/ @3.把这部分程序拷贝到（代码）窗口中;
4 R0 M$ ~0 Q) }% l4.选择菜单：运行>运行子过程用户窗体;
4 y, [( W/ Q6 ^+ Y- V) l5.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
