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分享一个AUTOCAD渐开线画法小程序:
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8 Z& e% j. Q/ ]5 F" }0 y. D Sub jkx()3 p; u7 p+ i% M% s
Rem 绘制渐开线,
- x, X( c5 ~% |- T. Q4 G& H Dim d As Double '节圆直径( c! g7 B" H6 \" j5 X7 U) l
Dim r As Double '节圆半径
$ K1 V/ v9 j6 N Dim A As Double '总展开角度
$ ^; R# B- T' V3 d4 t Dim Ai As Double '展开角度+ _5 \8 a$ \; d6 ~' m; z. A5 h
Dim Li As Double '展开弧长
, i7 G1 j# H$ Y9 Q, Y& F; t d = 1007 [* s; J8 r! W) [
A = 360
1 u" P3 h& @; k5 _ r = d / 2
8 O/ t- `; Y. _ Dim Pnt1(2) As Double. T! p$ ]3 d+ L. Z- q
Dim Pnt2(2) As Double
4 Z" ^( l0 M3 k. |+ f$ v Dim PntLst() As Double, N As Integer) C& b* X1 d1 h$ D& ^- K
ThisDrawing.ModelSpace.AddCircle Pnt1, r7 d2 R) m: O( W! P$ k" N" V
For Ai = 0 To A * Atn(1) / 45# Step Atn(1) / 45#0 ~& @; o9 x8 n+ N+ E
Li = r * Ai |& P7 R/ u8 f3 z
Pnt1(0) = r * Sin(Ai)* e0 V* g! M3 d( p. Y. A* u
Pnt1(1) = r * Cos(Ai)
4 G' j: K+ x8 d9 \3 A Pnt2(0) = Pnt1(0) - Li * Cos(-Ai)' g/ c, v0 e; B* F7 B* `) L" n
Pnt2(1) = Pnt1(1) - Li * Sin(-Ai)
: O4 A& T. F' { ThisDrawing.ModelSpace.AddLine Pnt1, Pnt2
6 ]1 Q; N! l' c5 V# U) W N = N + 1- Y3 r, i8 j' K
ReDim Preserve PntLst(N * 2 - 1)3 h* P" d* Q& I- H# H' F$ F$ v
PntLst(N * 2 - 2) = Pnt2(0)! w5 P3 G: u% ^8 m B( j' L
PntLst(N * 2 - 1) = Pnt2(1)
2 ?( v6 z7 H4 r) u; D+ z$ L Next
; w! G2 L, f% n# t/ ]. c( Y If N > 1 Then) ^. w3 ~- Q. S' W- _3 G
ThisDrawing.ModelSpace.AddLightWeightPolyline PntLst" |5 X8 ]/ W U1 S7 M9 x0 |
End If& ?; F5 h) R- v
End Sub
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1.进入菜单:工具>宏>visual Basic编辑器;
" o3 \7 R; S! p+ i' J2.在编辑器中选菜单:插入>模块;) \+ D6 v' T5 x) U3 j; r% {
3.把这部分程序拷贝到（代码）窗口中;9 ?/ @) K* t3 I
4.选择菜单：运行>运行子过程用户窗体;
, {; l+ q6 Q& V" h; e8 i5 d- r* 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
