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分享一个AUTOCAD渐开线画法小程序:% G5 N8 `; w* j
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Sub jkx()
% ~+ U8 q! w6 A$ j Rem 绘制渐开线,
2 R$ i7 V' a+ B/ g$ c( V Dim d As Double '节圆直径0 @% H) @/ V* Y3 G% `$ o% U: b
Dim r As Double '节圆半径8 L+ ?# Q7 K% x% Q- e% d% W
Dim A As Double '总展开角度
2 o& B/ F; E7 u Dim Ai As Double '展开角度4 J8 U$ Y6 E1 C6 q
Dim Li As Double '展开弧长
9 n$ a! m; s7 c r' ? d = 1007 v5 b* M0 K7 V( E( p' ~( R
A = 360. }* _( ~( [) Y" G* v
r = d / 22 B, ~! \& \1 F- l7 t$ W5 x% ^0 L
Dim Pnt1(2) As Double8 y7 Z% g6 r8 b, A+ }: m7 a! U3 l
Dim Pnt2(2) As Double
$ E; Q( o& Y K3 {7 j" V Dim PntLst() As Double, N As Integer
" a" h; ~! m' O ThisDrawing.ModelSpace.AddCircle Pnt1, r' q8 z8 M9 k9 k a$ `
For Ai = 0 To A * Atn(1) / 45# Step Atn(1) / 45#
+ K- q4 S. s' Q Li = r * Ai
/ c. O7 S& f- I; \( r0 m3 ^ Pnt1(0) = r * Sin(Ai); ^5 B( X0 @" X/ N* w
Pnt1(1) = r * Cos(Ai)5 n3 d s2 L/ g/ t
Pnt2(0) = Pnt1(0) - Li * Cos(-Ai)
e ?5 N% x8 B$ D Pnt2(1) = Pnt1(1) - Li * Sin(-Ai)- r6 ~# e4 O9 o' s) }- N
ThisDrawing.ModelSpace.AddLine Pnt1, Pnt2
7 O' o, S+ n8 C N = N + 1( C' u5 ~; z3 v- S3 Z
ReDim Preserve PntLst(N * 2 - 1)
2 C$ ~+ _7 q6 U( a1 p PntLst(N * 2 - 2) = Pnt2(0)7 @$ j2 ?5 \, f3 l% \( u) p
PntLst(N * 2 - 1) = Pnt2(1): S( r8 W. C' P+ N& I. s \: }0 L
Next( i7 C1 l) c5 ]0 Q7 o
If N > 1 Then
6 e% I' e' L3 v' j# y& F, g ThisDrawing.ModelSpace.AddLightWeightPolyline PntLst4 d6 Y2 J/ P' I. X1 S8 @: u; }9 V9 i
End If
& A/ V) i+ B2 REnd Sub
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7 L( o; v& @. y, }) V9 ]1.进入菜单:工具>宏>visual Basic编辑器;
, Z; ~! @3 B! C( l2.在编辑器中选菜单:插入>模块;
4 ]3 O& |' ^) i8 `3.把这部分程序拷贝到（代码）窗口中;
+ C/ U$ o }; M5 i% o" P- m' N3 j8 r2 P4.选择菜单：运行>运行子过程用户窗体;
/ F6 U+ b* ?) X6 W5.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
