将下列程序拷到CAD中“工具” “选项”“宏”“VisualBasic编辑器”里，运行即可。
8 `0 A$ J2 A J `3 u9 _7 |Sub jkx()
. Z0 f1 p" V7 J: p/ H [% x Rem 绘制渐开线,By Sdh,2006-6-8
: S# H3 X/ v+ W, K1 G# o2 a2 m" J Dim d As Double '节圆直径
6 m" V8 G( \1 O; O Dim r As Double '节圆半径, q) g% a. k" b$ S8 u- _9 j
Dim A As Double '总展开角度
1 {7 _; }1 S' \1 ^" G Dim Ai As Double '展开角度% V; D8 e2 {3 Q; a
Dim Li As Double '展开弧长
1 `- `' X# I2 ?4 U" ] d = 100" o b) [7 O! t2 _( o/ H+ L! s" }
A = 360
8 `0 n/ q0 t4 }5 r! B r = d / 2
9 i0 E- w, l5 m# y4 g3 q Dim Pnt1(2) As Double
8 ?7 w, W' h. R/ D+ O Dim Pnt2(2) As Double
& m" j. [7 v0 y2 L8 a" Q) t I Dim PntLst() As Double, N As Integer
9 U; M/ S; o. T4 K/ n- m ThisDrawing.ModelSpace.AddCircle Pnt1, r$ G3 g- U# a4 F7 B4 b& c, b8 O
For Ai = 0 To A * Atn(1) / 45# Step Atn(1) / 45#
& [. W4 p4 h+ h4 I- K Li = r * Ai
$ }% V5 H& [$ E) r( r& B Pnt1(0) = r * Sin(Ai)
; ^. W* L) o% J Pnt1(1) = r * Cos(Ai)
2 S0 a' m4 o! D: U$ G- Y' K Pnt2(0) = Pnt1(0) - Li * Cos(-Ai)
* z* o9 ~1 ] B7 `6 m" b. T Pnt2(1) = Pnt1(1) - Li * Sin(-Ai)
; }3 R0 K5 T8 d5 B: O U; a3 P ThisDrawing.ModelSpace.AddLine Pnt1, Pnt28 B4 I. B* [( R1 o; z- u9 ^
N = N + 1
) D" B) Z# W n1 W; N" q, } ReDim Preserve PntLst(N * 2 - 1)) P: G; A( K) A) f& f+ R
PntLst(N * 2 - 2) = Pnt2(0)
0 e5 [9 `: e) d( g% S# Y- t PntLst(N * 2 - 1) = Pnt2(1): _1 d: n9 h1 k9 d$ d Q. S8 h
Next) k: D$ r. A& r% T& J% O# N, }, ?* h
If N > 1 Then
9 C+ X3 _, Z! X. E! K/ ~ ThisDrawing.ModelSpace.AddLightWeightPolyline PntLst
) l! [' O4 S1 o9 ^/ Y) y4 C) y/ d End If
% f* \/ a9 J$ y; h; j; f) qEnd Sub |
发表于 2006-10-22 11:03
