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分享一个AUTOCAD渐开线画法小程序:4 B5 Z/ C0 l# }, w- g8 D0 `0 ?
0 A J' y' v( T O0 P! i. c Sub jkx()5 O7 n$ v. o& Z; ^( x: Q* p/ c
Rem 绘制渐开线,9 g( Z. @- S8 @! M7 G3 v3 ^8 E
Dim d As Double '节圆直径# o ?, g- D: T( ^/ f. n( \, s3 K9 n0 \
Dim r As Double '节圆半径. a" j \; e2 g: ^6 Z! A& R
Dim A As Double '总展开角度
2 D. L5 b, Q# A3 W Dim Ai As Double '展开角度6 C; E" I2 N6 ?( P1 B! U2 {7 c
Dim Li As Double '展开弧长+ J3 t" i, X6 n4 t8 G |
d = 100, k4 \, {4 k! @( U0 }
A = 360
3 I4 S4 q5 ~0 x r = d / 2
' Z& i. K7 R* U6 ?2 A+ n Dim Pnt1(2) As Double' z6 J; R7 u+ Y0 p6 J0 E2 d- ]- r
Dim Pnt2(2) As Double
( _' u3 s" v' N Dim PntLst() As Double, N As Integer
; D6 U8 f! A" H' I ThisDrawing.ModelSpace.AddCircle Pnt1, r2 q2 Z, h' y& X( Y" E
For Ai = 0 To A * Atn(1) / 45# Step Atn(1) / 45#
% a# _# T# ~2 I: _ Li = r * Ai% w! ], [ j3 ~; D2 v5 \& Y% L
Pnt1(0) = r * Sin(Ai)
: |! ?' s# L$ k3 H" b Pnt1(1) = r * Cos(Ai)
0 E2 T5 q7 V/ \- u& O3 M3 \- K2 D Pnt2(0) = Pnt1(0) - Li * Cos(-Ai), }2 f0 h, U0 F1 F8 ?
Pnt2(1) = Pnt1(1) - Li * Sin(-Ai)
* Y5 c( d+ l/ U) Z8 y4 S) v ThisDrawing.ModelSpace.AddLine Pnt1, Pnt2
5 c6 b4 n1 p/ j3 g+ u& k N = N + 10 X. k7 n6 ]2 H" ^) R
ReDim Preserve PntLst(N * 2 - 1)
1 ] \# Z# a/ q! {$ r PntLst(N * 2 - 2) = Pnt2(0)
O, @! D* w) Y8 u3 }7 m8 x PntLst(N * 2 - 1) = Pnt2(1)
. C$ T. d9 n2 d+ g Next
" K+ Y& ]$ [, A$ t% k( C If N > 1 Then& E$ c* |/ V" P7 {# }! k, \
ThisDrawing.ModelSpace.AddLightWeightPolyline PntLst4 u: J- U) ]9 L. H# A. A' G) d
End If% ^) M$ g( C; Q+ w7 ^. X- }5 }# O/ u2 `0 R
End Sub. j9 \% h/ Y# L
9 y; v& |1 F t% c9 K1 q6 ~1.进入菜单:工具>宏>visual Basic编辑器;: Y+ l0 l4 ]# l# Z7 A4 K/ e U
2.在编辑器中选菜单:插入>模块;+ S! k- e: f' V& I, `" J5 `
3.把这部分程序拷贝到（代码）窗口中;
6 V( v" k' F5 K4.选择菜单：运行>运行子过程用户窗体;" o" @: U# v* U" O- j
5.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
