[Paraview] Ghost cells for standalone Paraview

[Fabian Wein]

Hi Ken,

thanks a lot - you solved the issue! :)

It works fine with the clip filter - memory consumption seems to be in
the green range!

Best regards from ol' Europe,

Fabian

> OK, I understand now.  What you are asking for is not exactly what
> VTK/ParaView considers ghost cells.  You want add a layer of points
> around the boundary of an image data (i.e. 3D uniform regular grid) with
> minimum values to force the contour filter to create closed surfaces.  I
> don’t know of an easy way to do this in ParaView (someone please correct
> me if I am wrong).
> 
> I think you can get the effect you want by using the clip by scalars
> feature.  Instead of using the contour filter, use the clip filter.
>  Change the “Clip Type” to “Scalar” and set the value to the isosurface
> you want to see.  The advantage of this approach is that the data you
> see will show the surface right at the edge of the volume instead of the
> arbitrary rounding at the edges you see in the Amira screenshots.  The
> disadvantage is that the underlying data is a solid unstructured
> geometry which could take up much more memory than the original image
> data.  If memory is an issue, let me know and I can describe
> memory-light version that uses a combination of the contour, extract
> surface, and clip filters.