[vtkusers] Isosurface with range

[stefano mininel]

If I've well understood what you need, you should probably use
vtkImageThreshold::ThresholdBetween() and its other methods to substitute nodes in range with
value (i.e.) 1000, all the ones outside range with 0, and then isosurfacing at level 500.
If before using this filter you substitute the values of the boundary nodes with something in
the range, they should be included into the isosurface. But if you simply need to have an idea
of the general structure it is probably better to show a simple semi-transparent box around the
isosurfaces you want to visualize.

erik.mejdal at risoe.dk wrote:

> Dear VTK users
>
> I have just started using vtk and is playing around with the opputinity of
> visualizing grains structures by isosurfaces. All voxels belonging to the
> same grain has the same scalar value (label). What I want to do is to assign
> an isosurface to each grain and be able to switch the visibility of each
> grain on/off.
>
> I have two problems:
> 1) Is it possible to specify both an upper AND a lower value for an
> isosurface. I have tried vtkImageGeometryFilter with a range but then I do
> not get access to the handle of each individual isosurface.
>
> 2) Is there a way to include the boundaries (sides of my volume) when
> producing the isosurfaces?
>
> Kind regards
> Erik Lauridsen
>
> ##################################################
> Erik Mejdal Lauridsen
> Center for Fundamental Research
> - Metal Structures in 4 Dimensions
> Risø National Laboratory
> P.O. Box 49
> DK-4000 Roskilde
> Phone: +45 4677 5760
> Fax: +45 4677 5758
> e-mail: erik.mejdal at risoe.dk
> ##################################################
>
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