[vtkusers] extract/filter the underlying vtkPolyData from vtkPolyDataMapper

[Jochen Kling]

Hi all,

reading an mesh file (wavefront obj format) looks like being straight forward:

	vtk.vtkOBJReader reader = new vtk.vtkOBJReader();
	vtk.vtkPolyDataMapper pDataMapper = new vtk.vtkPolyDataMapper();
        reader.SetFileName("c:/data/grid.obj");
        pDataMapper.SetInputConnection(reader.GetOutputPort());
        ...

This is working fine and I'm able to render it. 

Now I would like to convert it to an unstructured grid. In order to do this I thought it might be worth having access to the underlying vtkPolyData object of the vtkPolyDataMapper.

Can anybody explain me how to accomplish this?

Altenativelly is there a way to read the file directly into a vtkPolyData object?

Or might it be possible to extract a vtkUnstructuredGrid directly from the pPolyDataMapper object?

I know these are lot of questions.

Thanks a lot in advance.

with best regards
Jochen Kling


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