[Paraview] Glyph scaling and orienting/programmable filter?

[David E DeMarle]

Try VTK's vtkTensorGlyph
http://www.vtk.org/doc/nightly/html/classvtkTensorGlyph.html filter.
You will have to write a plugin to let paraview use it. See
http://www.paraview.org/Wiki/Plugin_HowTo#Enabling_a_filter_in_VTK


On Tue, Mar 3, 2009 at 3:41 AM, Pawel Krupinski <exmeson at yahoo.com> wrote:
> Thanks for reply,
> but I don't think it will work in my case. Maybe I wasn't specific enough
> about my data and it was confusing.
> I have point data witch represent centers of ellipsoidal cells. With each
> point there are associated lengths of ellipsoid axes (e.g. as a vector
> data), which can be different for each ellipsoid, and directions of those
> axes in space (3 vectors). I want to display those ellipsoids oriented and
> in appropriate scale.
> So I was thinking:  I need to scale spheres anisotropically to get
> ellipsoids so I really need to do it by scaling with vector components of
> the scales/axes_length vector. Scaling by scalars works isotropically so it
> won't help. Now I need to align axes of each ellipsoid in space. I probably
> need to do it by programmable filter, but I don't know how to operate on
> separate glyphs (ellipsoids) and their data. Did anyone have similar problem
> and solved it somehow?
> Thanks.
> Pawel
>
>  >mirko heuegger wrote
>>I suggest that you 'convert' one vector data into a scalar (e.g. over
>>the Calculator-filter, and by using the functions: mag(<vector>),
>>iHat.<vector>, jHat.<vector>, or kHat.<vector> (magnitude, X, Y, and Z
>>of a vector) for calculating the desired vector-parts).
>>Then change the 'Scale Mode', of the Glyph-filter, to 'scalar', and
>>select the calculation-result as scalar-field.
>
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David E DeMarle
Kitware, Inc.
R&D Engineer
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Clifton Park, NY 12065-8662
Phone: 518-371-3971 x109