CAD如何进行五角星绘制？

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'五角星绘制****************************************五角星绘制*************************************
Sub 五角星()
    Dim PO As Variant
    Dim P(0 To 19) As Double
   
    Dim Max As Variant
    Dim Min As Variant
    On Error Resume Next
    '在存储图形范围内绘制五角星，当然还可以制定其他矩形区域的两个角点
    Max = ThisDrawing.GetVariable("extmax")
    Min = ThisDrawing.GetVariable("extmin")
    '从下面绘制的两个点看得出来，这个点并不是屏幕的绘图区域.
    'ThisDrawing.ModelSpace.AddPoint Max
    'ThisDrawing.ModelSpace.AddPoint Min
    'Rectangle Max, Min
    ThisDrawing.Utility.InitializeUserInput 1, ""
    PO = ThisDrawing.Utility.GetPoint(, "插入点:")
   
    Dim R1 As Double, R2 As Double
    R1 = P2PDistance(Max, Min) / 2
    Dim PI As Double
    PI = Atn(1) * 4
    '三角形定理：a/Sin(A)=b/Sin(B)=c/Sin(C)
    R2 = R1 * Sin(18 * PI / 180) / Sin(126 * PI / 180)
    Dim i  As Integer
    '定点坐标计算方法参见文件夹下的说明。
    For i = 0 To 4
        P(2 * 2 * i) = PO(0) + R1 * Cos((18 + 72 * i) * PI / 180):
        P(2 * 2 * i + 1) = PO(1) + R1 * Sin((18 + 72 * i) * PI / 180)
        P(2 * (2 * i + 1)) = PO(0) + R2 * Cos((54 + 72 * i) * PI / 180):
        P(2 * (2 * i + 1) + 1) = PO(1) + R2 * Sin((54 + 72 * i) * PI / 180)
    Next
    Dim PL As AcadLWPolyline
    Set PL = ThisDrawing.ModelSpace.AddLightWeightPolyline(P)
    PL.color = acRed
    PL.Closed = True
    For i = 0 To 9
    ThisDrawing.ModelSpace.AddLine PO, Point3D(P(2 * i), P(2 * i + 1), 0)
    Next i
End Sub