[vtkusers] picking individual spheres in 3D glyph

Malcolm Drummond malcolm at geovision.co.za
Sat Sep 29 08:14:07 EDT 2001

Hi Jiaye

I use spheres to represent multiple seismic events with one actor. I get around picking by using a programmable glyph filter and building a lookup-table based on cell-ids on each iteration of the GlyphMethod. When you do a pick on the actor you can then get the id of your input point from the id of the picked cell.
I hope this helps
  ----- Original Message ----- 
  From: jiaye zhou 
  To: vtkusers at public.kitware.com 
  Sent: Saturday, September 29, 2001 8:55 AM
  Subject: [vtkusers] picking individual spheres in 3D glyph



    I am fairly new with VTK (3.2), so my experience is limited. I have a set of vertices in a 3D Glyph, represented as spheres. So the spheres are not individual actors. I would like to be able to somehow pick individual spheres and, say, change its color or retrieve the original vertex's point value. After studying documentation and example codes, I didn't see a straight forward way of doing this. I've also looked on the web as well as in this list's archive. There were similar questions asked, but didn't see any suggested solutions. Has anyone worked out a way to do this? I guess I can always make individual sphere an actor, but I understand that there are performance problems with >1K actors. I appreciate and look forward to any comment/suggestion from the community. Thanks in advance.


  Jiaye Zhou

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20010929/5ce8ea91/attachment.htm>

More information about the vtkusers mailing list