[vtkusers] Get vtkPolyData from vtkMapper in vtkActor using Java API

[kent myers]

I am trying to export a vtkPolyData object to a vtp file using
vtkXMLPolyDataWriter.  The online VTK documentation says to use the
writer.SetInput() method that takes a vtkPolyData object.

I am having some problems with this strategy:
1. I can get the vtkMapper object from my vtkActor, but the vtkMapper object
has no GetInput() method to retrieve a vtkPolyData object (or any other
method)
2. vtkXMLPolyDataWriter has no SetInput() method (or any other method) to
pass the vtkPolyData object even if I could get the vtkPolyData object.

Has anyone successfully exported vtkPolyData from a Java application? If so,
how?





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