[vtkusers] Question about visualization

[Rustem Khabetdinov]

As far as I know there is tensorglyph in vtk that allows to visualize
superquadrics. I've tried to use it but it gives me incorrect glyph. It
always gives me sphere instead of ellipsoid.

2017-07-04 18:44 GMT+03:00 longbowzhang <longbowzhangchina at gmail.com>:

> Basically you try to visualize a 3-by-3 symmetric matrix.
> The natural choice is to use an ellipsoid.
>
> Unfortunately, you have *negative* eigenvalues.
> Therefore, the most elegant visualization should be this
> SuperquadricTensorGlyph
> <http://people.cs.uchicago.edu/~glk/sqd/schultzTVCG10SuperquadricTenso
> rGlyphs.pdf>
> .
> The  code <http://web.ci.uchicago.edu/~schultz/sphinx/superquadrics.html>
> is based on OpenGL, rather than VTK.
>
> Hope this could help or inspire you to some extent.
>
> Longbow
>
>
>
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