[vtkusers] How can I get a combination of Glyph3D and Follower?

[David.Pont at ensisjv.com]

"Day, Robert" <Robert.Day at health.wa.gov.au> wrote on 08/11/2005 14:42:21:

> Hi all,
>
> I want to render some points around a landmark on a vtkPolyData for
> publication in limited grey scale.  The points look great rendered
> as spheres with vtkGlyph3D on the screen, but not so good when
> printed as the loss of shading subtlety tends to blend them together.
>
> Ideally, I would like to render them as filled outlined circles,
> much as one would do when plotting a graph.  This means they would
> have to face the camera all the time to be properly visible.
>
> vtkGlyph3D will glyph the points; vtkFollower will always face the
> camera, but vtkFollower is an actor, so I can't use it as a glyph
> source.  I have tried getting the Matrix4x4 from vtkFollower to
> build a transform and apply to my glyph source, as suggested in this
> list some time ago, but in python and tcl vtkFollower's GetMatrix
> method always seems to return Identity.
>
> Another idea, perhaps one with more general application, would be to
> outline the silhouettes of my actors, which is what I would do if I
> were rendering this by hand.  This would make my polydata look
> better as well as my glyphs.  Unfortunately I haven't been able to
> work out how to do this either :-(
>
> Does anyone have any hints or suggestions?
>
> Rob.
> --
> Robert Day            ph  +61 8 9224 3227
> Project Bioengineer   fax +61 8 9224 1138
> Royal Perth Hospital  robert.day at health.wa.gov.au
> _______________________________________________
> This is the private VTK discussion list.
> Please keep messages on-topic. Check the FAQ at: http://www.vtk.
> org/Wiki/VTK_FAQ
> Follow this link to subscribe/unsubscribe:
> http://www.vtk.org/mailman/listinfo/vtkusers

Hi Robert,
  what about controlling lighting for the glyphs so they are a solid colour
without shading? I'm not sure on exactly how to do this but a quick search
in the archive turned up this:

http://public.kitware.com/pipermail/vtkusers/2005-June/080426.html

Kia Ora,
  Dave P