将下列程序拷到CAD中“工具” “选项”“宏”“VisualBasic编辑器”里,运行即可。
, g) i9 u# e4 S0 G( i6 HSub jkx(); m u& ]0 [5 M# r# C# z5 ^3 F
Rem 绘制渐开线,By Sdh,2006-6-8
/ G! W7 K' e% y, U( N Dim d As Double '节圆直径7 F+ V4 k: l3 O6 P' G& q
Dim r As Double '节圆半径2 t4 @# [* w9 d1 e# ]4 x& V
Dim A As Double '总展开角度
; M0 r/ A5 c; r; J- g: M) V6 \2 K Dim Ai As Double '展开角度5 U! e- c, j2 p8 ?, n/ a
Dim Li As Double '展开弧长
! g! w% O) |4 U! z+ B4 L# \ d = 100
3 s+ j8 M! S0 x, q3 s A = 360
6 Y% E, Y# S; k2 E4 g r = d / 2
- q1 x5 }. b* W s6 b Dim Pnt1(2) As Double
0 {' n0 E0 \% C8 o: {8 v Dim Pnt2(2) As Double
) k' F' N0 i3 \$ i+ Z3 l+ H Dim PntLst() As Double, N As Integer3 N& x1 w1 M; k8 ~% S) c
ThisDrawing.ModelSpace.AddCircle Pnt1, r$ T( w1 F B8 v
For Ai = 0 To A * Atn(1) / 45# Step Atn(1) / 45#2 |* `0 o. c" p3 G
Li = r * Ai
: V% O3 Z) z7 Y' X( f& Z8 q M Pnt1(0) = r * Sin(Ai)
) l7 A* Z3 n' i+ \: M2 F: Y2 g Pnt1(1) = r * Cos(Ai)+ K( S! F1 U" V6 I
Pnt2(0) = Pnt1(0) - Li * Cos(-Ai). e9 B) }/ P# n# D/ ], |
Pnt2(1) = Pnt1(1) - Li * Sin(-Ai)5 q* J& k2 n' C/ Y! T6 Q3 M
ThisDrawing.ModelSpace.AddLine Pnt1, Pnt2
: V1 O" k0 F. q) G& Z N = N + 1
( A' h, I- M7 P4 a, [" ~! D ReDim Preserve PntLst(N * 2 - 1)
8 ~1 _9 x6 U- j% R( R PntLst(N * 2 - 2) = Pnt2(0)3 L- Z* w5 o0 n/ Q1 g1 J' R
PntLst(N * 2 - 1) = Pnt2(1), o: I1 U% |6 @6 y2 L% }; s# g: j6 x2 C
Next; C6 p) q; ?7 [+ q
If N > 1 Then. w" E- C6 ]+ {% C4 C. M
ThisDrawing.ModelSpace.AddLightWeightPolyline PntLst
, O7 F \7 C5 I* | End If
( q3 E8 {5 J# w+ YEnd Sub |