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Sub jkx()" C9 r# X" o+ l+ o- M8 `* a2 x$ c
Rem 绘制渐开线,
) w( I2 ^: W) k) {4 L1 iDim d As Double '节圆直径4 R9 x$ s8 o* h$ ~' ]
Dim r As Double '节圆半径
4 x* f* X: Q# }, N, [1 lDim A As Double '总展开角度
1 V1 p" D u% |Dim Ai As Double '展开角度/ O5 e: v' S2 N; h2 C* j ^
Dim Li As Double '展开弧长
7 C* J, D& s2 ud = 100
. } K" c) r% J2 C$ b- f, [: `A = 360
3 V) F' b' S6 z3 pr = d / 2 P1 X# {: ^2 Z T7 n4 J& K8 t& t" U
Dim Pnt1(2) As Double( |; X- Z7 f7 w2 ] d0 B7 p
Dim Pnt2(2) As Double
( `- ^8 W& B8 B f- H3 vDim PntLst() As Double, N As Integer
% M" l7 u1 N$ i6 aThisDrawing.ModelSpace.AddCircle Pnt1, r
. O* }- `/ F; J* ] z' Q1 fFor Ai = 0 To A * Atn(1) / 45# Step Atn(1) / 45#& q" c/ ~$ X5 E9 H
Li = r * Ai
* T/ y' m9 O* gPnt1(0) = r * Sin(Ai)$ l2 B$ J6 M F! K8 r! l8 i
Pnt1(1) = r * Cos(Ai)
0 C$ S. \) p; n" O1 t, i- p) CPnt2(0) = Pnt1(0) - Li * Cos(-Ai)
0 O$ e0 _" i% X- P9 ]5 _5 YPnt2(1) = Pnt1(1) - Li * Sin(-Ai)
0 C* T( X" X5 @$ i' A4 H0 |) m$ ?ThisDrawing.ModelSpace.AddLine Pnt1, Pnt29 w. H- i1 A4 l9 u& i
N = N + 1
2 V% T4 x$ |% L) F! PReDim Preserve PntLst(N * 2 - 1)% P7 @- X+ T* [6 v* }# e6 _3 ~
PntLst(N * 2 - 2) = Pnt2(0)
4 G% A8 q1 T! z. z1 E- P1 s- L _/ \PntLst(N * 2 - 1) = Pnt2(1); v! U, f; M- ?3 v4 k
Next, x, \9 n I L3 z- ^; J
If N > 1 Then
$ x/ c1 p- Y5 O VThisDrawing.ModelSpace.AddLightWeightPolyline PntLst
! [% S& r" M. W+ T) P4 U CEnd If L- ?- d3 @5 y0 n) q: Q
End Sub |
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发表于 2009-12-16 22:54:24
