[vtkusers] How to use vtkFeatureEdges?

[alisaad05]

nspx wrote
> Hi Wenlong,
> 
> Maybe you can have a look at this example, it might be your solution.
> http://www.vtk.org/Wiki/VTK/Examples/Cxx/PolyData/ExternalContour
> 
> Bye


Hi all,

I've been struggling lately to achieve the same effect shown in the quoted
example, but I need a surface silhouette instead of the line silhouette,
which the consequence of using the image filter.

I want to extract the outermost region with its original topology from a
vtkPolyData (loaded from STL for instance) ignoring all internal surfaces,
whether they are manifold or non-manifold.
Can I use vtkFeatureEdges to flag internal triangles and delete them ? 

I have already tested simple pipelines using vtkDataSetSurfaceFilter and
vtkGeometryFilter, but none is able to extract outer surface only, instead
all internal features are kept in the result.

Any help is appreciated, regards
Ali



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