贺明言琪 发表于 2024-3-9 14:15:29

CAD2017样条曲线怎么转换成圆

图中红颜色圆圈显示是样条曲线,怎么转换成圆

qsch2000* 发表于 2024-3-9 20:41:29

同问,我们的线切割编程软件老是把样条线和椭圆后处理成直线段,导致精度不高,如果能围成圆弧段就好了。

小海de 发表于 2024-3-9 23:21:49

自己手动画个就好了

贺明言琪 发表于 2024-3-10 09:51:17

小海de 发表于 2024-3-9 23:21
自己手动画个就好了

批量的,太多了

小海de 发表于 2024-3-11 00:42:41

截面搞定这种

贺明言琪 发表于 2024-3-11 10:42:43

小海de 发表于 2024-3-11 00:42
截面搞定这种

可以具体说一下么

小海de 发表于 2024-3-11 17:51:51

贺明言琪 发表于 2024-3-11 10:42
可以具体说一下么

就是截图   他就不会出现这种

chixun99 发表于 2024-3-13 16:27:54

命令:pedit
是否将其转换为多段线? <Y> Y
指定精度 <10>: 15
输入选项 [闭合(C)/合并(J)/宽度(W)/编辑顶点(E)/拟合(F)/样条曲线(S)/非曲线化(D)/线型生成(L)/反转(R)/放弃(U)]: F
……
……
试试这个,输入精度数值越大,与原曲线贴合越精确。

mayzhang1024 发表于 2024-3-17 19:49:15

VBA可以

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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