[VBA]如何在ＶＢＡ中画不同宽度的多线

luofang683

请各位高手指点，如何在ＶＢＡ中画不同宽度的多线，盼复，谢谢！

王咣生

帮助中的例子,SetWidth()方法:

Sub Example_SetWidth()
    ' The following code prompts you to select a lightweight
    ' polyline, and then prompts you for the width to set each
    ' segment of the polyline.
    ' Pressing ENTER without specifying a width is equivalent to
    ' entering 0.
     
    Dim returnObj As AcadObject
    Dim basePnt As Variant
    Dim retCoord As Variant
    Dim StartWidth As Double
    Dim EndWidth As Double
    Dim i, j As Long
    Dim nbr_of_segments As Long
    Dim nbr_of_vertices As Long
    Dim segment As Long
    Dim promptStart As String
    Dim promptEnd As String
             
    On Error Resume Next
  
    ThisDrawing.Utility.GetEntity returnObj, basePnt, "Select a polyline"
      
    ' Make sure the user selected a polyline.
    If Err <> 0 Then
        If returnObj.EntityName <> "AcDbPolyline" Then
            MsgBox "You did not select a polyline"
        End If
        Exit Sub
    End If
   
    ' Obtain the coordinates of each vertex of the selected polyline.
    ' The coordinates are returned in an array of points.
    retCoord = returnObj.Coordinates
   
    segment = 0
    i = LBound(retCoord)                 ' Start index of coordinates array
    j = UBound(retCoord)                 ' End index of coordinates array
    nbr_of_vertices = ((j - i) \ 2) + 1  ' Number of vertices in the polyline
   
    ' Determine the number of segments in the polyline.
    ' A closed polyline has as many segments as it has vertices.
    ' An open polyline has one fewer segment than it has vertices.
    ' Check the Closed property to determine if the polyline is closed.
   
    If returnObj.Closed Then
        nbr_of_segments = nbr_of_vertices
    Else
        nbr_of_segments = nbr_of_vertices - 1
    End If
   
    ' Have user set the width for each segment of the polygon
    Do While nbr_of_segments > 0
         
        ' Get width values from the user
        promptStart = vbCrLf & "Specify the width at the beginning of the segment at " & retCoord(i) & "," & retCoord(i + 1) & " ==> "
        promptEnd = vbCrLf & "Now specify the width at the end of that segment ==> "
      
        StartWidth = ThisDrawing.Utility.GetReal(promptStart)
        EndWidth = ThisDrawing.Utility.GetReal(promptEnd)

        ' Set the width of the current segment
        returnObj.SetWidth segment, StartWidth, EndWidth
    
        ' Prepare to obtain width of next segment, if any
        i = i + 2
        segment = segment + 1
        nbr_of_segments = nbr_of_segments - 1
    Loop
     
    MsgBox "Segment widths have been set", , "SetWidth Example"

End Sub