CAD画渐开线

zh_be

CAD画渐开线
1.进入菜单:工具>宏>visual Basic编辑器;
2.在编辑器中选菜单:插入>模块;
3.把这部分程序拷贝到（代码）窗口中;
4.选择菜单：运行>运行子过程用户窗体;
5.在AutoAcad绘图界面中可以看到结果.
Sub jkx()
    Rem 绘制渐开线,By Sdh,2006-6-8
    Dim d As Double   '节圆直径
    Dim r As Double   '节圆半径
    Dim A As Double   '总展开角度
    Dim Ai As Double  '展开角度
    Dim Li As Double  '展开弧长
    d = 100
    A = 360
    r = d / 2
    Dim Pnt1(2) As Double
    Dim Pnt2(2) As Double
    Dim PntLst() As Double, N As Integer
    ThisDrawing.ModelSpace.AddCircle Pnt1, r
    For Ai = 0 To A * Atn(1) / 45# Step Atn(1) / 45#
        Li = r * Ai
        Pnt1(0) = r * Sin(Ai)
        Pnt1(1) = r * Cos(Ai)
        Pnt2(0) = Pnt1(0) - Li * Cos(-Ai)
        Pnt2(1) = Pnt1(1) - Li * Sin(-Ai)
        ThisDrawing.ModelSpace.AddLine Pnt1, Pnt2
        N = N + 1
        ReDim Preserve PntLst(N * 2 - 1)
        PntLst(N * 2 - 2) = Pnt2(0)
        PntLst(N * 2 - 1) = Pnt2(1)
    Next
    If N > 1 Then
        ThisDrawing.ModelSpace.AddLightWeightPolyline PntLst
    End If
End Sub

htcjx70121

有视频吗，下载了，不会用