CAD2017样条曲线怎么转换成圆 - UG爱好者

Public Sub ConvertSplineToArcs()
Dim spline As AcadSpline
Dim i As Integer
Dim points As Variant
Dim startPoint As Variant
Dim midPoint As Variant
Dim endPoint As Variant
Dim radius As Double
Dim centerPoint As Variant
' 确保至少选中了一条样条线
If ThisDrawing.SelectionSets.Count = 0 Then Exit Sub
Set ss = ThisDrawing.SelectionSets.Item("WindowsSelectionSet")
If Not ss.Count >= 1 Then Exit Sub
Set ent = ss.Item(0).Entities.Item(0)
If Not TypeOf ent Is AcadSpline Then Exit Sub
Set spline = ent
' 获取样条线的控制点
points = spline.GetControlPoints
' 循环遍历每个定点对，并创建圆弧
For i = 0 To UBound(points) - 2 Step 3
startPoint = points(i)
midPoint = points(i + 1)
endPoint = points(i + 2)
' 计算圆弧的半径和中心点
radius = Distance(startPoint, midPoint)
centerPoint = MidPoint(startPoint, midPoint)
' 创建圆弧
Dim startAngle As Double
Dim endAngle As Double
' 计算起始角度和结束角度
' 这里需要根据实际情况进行计算
startAngle = AngleBetween(centerPoint, startPoint)
endAngle = AngleBetween(centerPoint, endPoint)
' 创建圆弧
Dim arc As AcadEntity
Set arc = ThisDrawing.ModelSpace.AddArc(centerPoint(0), centerPoint(1), centerPoint(2), radius, radius, startAngle, endAngle)
Next i
End Sub
' 计算两点之间的距离
Function Distance(pt1 As Variant, pt2 As Variant) As Double
Distance = Sqr((pt1(0) - pt2(0)) ^ 2 + (pt1(1) - pt2(1)) ^ 2)
End Function
' 计算两点之间的中点
Function MidPoint(pt1 As Variant, pt2 As Variant) As Variant
MidPoint = Array((pt1(0) + pt2(0)) / 2, (pt1(1) + pt2(1)) / 2, (pt1(2) + pt2(2)) / 2)
End Function
' 计算两向量之间的角度
Function AngleBetween(centerPoint As Variant, otherPoint As Variant) As Double
Dim vecX As Double
Dim vecY As Double
vecX = otherPoint(0) - centerPoint(0)
vecY = otherPoint(1) - centerPoint(1)
' 计算角度的代码需要根据实际情况进行编写
' 这里是一个简化的示例
AngleBetween = Atn2(vecY, vecX) * 180 / 4.14159265358979
End Function

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