[vtkusers] converting vtkPolydata to vtkUnstructuredgrid

[eliya.mir at gmail.com]

found this way to transform a polydata to unstructuredgrid:


    disk = vtkDiskSource()
    disk.SetInnerRadius(internal_radius)
    disk.SetOuterRadius(external_radius)
    disk.SetRadialResolution(radial_resolution)
    disk.SetCircumferentialResolution(circumferential_resolution)
    disk_polyData = disk.GetOutput()
    disk_usg = vtkUnstructuredGrid()
    appendFilter = vtkAppendFilter()
    appendFilter.AddInput(disk_polyData)
    merge = vtkExtractUnstructuredGrid()
    merge.SetInputConnection(appendFilter.GetOutputPort())
    merge.MergingOn()
    merge.Update()
    disk_usg = merge.GetOutput()
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