[vtkusers] Empty polydata being generated by vtkContourFilter

[Bill Lorensen]

It does not produce verts, it produces points.
On Mar 31, 2016 3:31 PM, "Garrett Morrison" <garrett.d.morrison at gmail.com>
wrote:

> I am currently passing an ImageData containing a scalar float array to a
> contour filter which I then plan to extract the verts and polys from for
> something I am working on. I have confirmed that the ImageData actually
> contains all the proper scalar values and that the isovalue being used for
> the contouring is within a reasonable range such that it should be
> generating a surface.
>
> The issue I am running into is that when I look at the GetOutput polydata
> of the contour filter, GetNumberOfPolys is returning a reasonable number
> while GetNumberOfVerts returns 0. So somehow it's generating the vertex
> indices but not the actual coordinates for said vertices. I did notice that
> enabling ClosedSurfaceOn for the contour causes it to not generate the
> polys either so I was wondering if possibly there's a setting I'm missing
> or something else I need to do to force it to generate both vertices as
> well as polygonal indices.
>
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