CAD2017样条曲线怎么转换成圆

mayzhang1024

VBA可以

1. Public Sub ConvertSplineToArcs()
   
2.     Dim spline As AcadSpline
   
3.     Dim i As Integer
   
4.     Dim points As Variant
   
5.     Dim startPoint As Variant
   
6.     Dim midPoint As Variant
   
7.     Dim endPoint As Variant
   
8.     Dim radius As Double
   
9.     Dim centerPoint As Variant
   
10.    
    
11.     ' 确保至少选中了一条样条线
    
12.     If ThisDrawing.SelectionSets.Count = 0 Then Exit Sub
    
13.     Set ss = ThisDrawing.SelectionSets.Item("WindowsSelectionSet")
    
14.     If Not ss.Count >= 1 Then Exit Sub
    
15.     Set ent = ss.Item(0).Entities.Item(0)
    
16.     If Not TypeOf ent Is AcadSpline Then Exit Sub
    
17.     Set spline = ent
    
18.    
    
19.     ' 获取样条线的控制点
    
20.     points = spline.GetControlPoints
    
21.    
    
22.     ' 循环遍历每个定点对，并创建圆弧
    
23.     For i = 0 To UBound(points) - 2 Step 3
    
24.         startPoint = points(i)
    
25.         midPoint = points(i + 1)
    
26.         endPoint = points(i + 2)
    
27.         
    
28.         ' 计算圆弧的半径和中心点
    
29.         radius = Distance(startPoint, midPoint)
    
30.         centerPoint = MidPoint(startPoint, midPoint)
    
31.         
    
32.         ' 创建圆弧
    
33.         Dim startAngle As Double
    
34.         Dim endAngle As Double
    
35.         ' 计算起始角度和结束角度
    
36.         ' 这里需要根据实际情况进行计算
    
37.         startAngle = AngleBetween(centerPoint, startPoint)
    
38.         endAngle = AngleBetween(centerPoint, endPoint)
    
39.         
    
40.         ' 创建圆弧
    
41.         Dim arc As AcadEntity
    
42.         Set arc = ThisDrawing.ModelSpace.AddArc(centerPoint(0), centerPoint(1), centerPoint(2), radius, radius, startAngle, endAngle)
    
43.     Next i
    
44. End Sub
    
45. 
    
46. ' 计算两点之间的距离
    
47. Function Distance(pt1 As Variant, pt2 As Variant) As Double
    
48.     Distance = Sqr((pt1(0) - pt2(0)) ^ 2 + (pt1(1) - pt2(1)) ^ 2)
    
49. End Function
    
50. 
    
51. ' 计算两点之间的中点
    
52. Function MidPoint(pt1 As Variant, pt2 As Variant) As Variant
    
53.     MidPoint = Array((pt1(0) + pt2(0)) / 2, (pt1(1) + pt2(1)) / 2, (pt1(2) + pt2(2)) / 2)
    
54. End Function
    
55. 
    
56. ' 计算两向量之间的角度
    
57. Function AngleBetween(centerPoint As Variant, otherPoint As Variant) As Double
    
58.     Dim vecX As Double
    
59.     Dim vecY As Double
    
60.     vecX = otherPoint(0) - centerPoint(0)
    
61.     vecY = otherPoint(1) - centerPoint(1)
    
62.     ' 计算角度的代码需要根据实际情况进行编写
    
63.     ' 这里是一个简化的示例
    
64.     AngleBetween = Atn2(vecY, vecX) * 180 / 4.14159265358979
    
65. End Function

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