<div dir="ltr"><span class="Apple-style-span" style="font-family: arial, sans-serif; font-size: 13px; border-collapse: collapse; "><div>found this way to transform a polydata to unstructuredgrid:</div><div><br></div><div><br>
</div><div><div>    disk = vtkDiskSource()</div><div>    disk.SetInnerRadius(internal_radius)</div><div>    disk.SetOuterRadius(external_radius)</div><div>    disk.SetRadialResolution(radial_resolution)</div><div>    disk.SetCircumferentialResolution(circumferential_resolution)</div>
<div>    disk_polyData = disk.GetOutput()    </div><div>    disk_usg = vtkUnstructuredGrid()</div><div>    appendFilter = vtkAppendFilter()</div><div>    appendFilter.AddInput(disk_polyData)</div><div>    merge = vtkExtractUnstructuredGrid()</div>
<div>    merge.SetInputConnection(appendFilter.GetOutputPort())</div><div>    merge.MergingOn()</div><div>    merge.Update()        </div><div>    disk_usg = merge.GetOutput()</div></div></span></div>