[vtkusers] Gouraud shading of a vtkStructuredGrid's boundary

[Cory Quammen]

Luca,

You are on the right track. vtkStructuredGridGeometryFilter should extract
just one polydata defining all the boundaries of your structured grid. In
the end, your pipeline should look like

vtkStructuredGrid -> vtkStructuredGridGeometryFilter -> vtkPolyDataNormals
-> vtkDataSetMapper -> vtkActor

HTH,
Cory

On Wed, Aug 10, 2016 at 12:08 PM, Luca Pallozzi Lavorante <
lplavorante at gmail.com> wrote:

> Hi everybody,
> Is there  any way to visualize a StructuredGrid's boundary with Gouraud
> shading?
> When I use a very simple pipeline vtkStructuredGrid -> vtkDataSetMapper
> -> vtkActor I am able to visualize the closed boundary of the grid. The
> polygons used in the rendering are triangles with a flat shading look.
> If I wish to apply  a Gouraud shading to this boundary, should I extract
> this closed surface as a vtkPolyData and then use vtkPolyDataNormals on it?
> If this is the case, How can I extract the boundary? Should I use
> vtkStructuredGridGeometryFilter to obtain six separate polydata's
> defining the boundary and then append them using vtkAppendPolyData?
>
> Thank you very much for your help
>
> Luca Pallozzi Lavorante
>
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-- 
Cory Quammen
R&D Engineer
Kitware, Inc.
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