Hey Peter,<br><br>I understand where you want to go with this. I had a somewhat similar problem in which i wanted to add the colors at a later step in the pipeline. I ended up failing in every sense because i could not create a lookuptable in the intuitive way one would expect using the GetIndex() like you described in your first post.
<br>After banging my head against it for a while i got the advise to add the color information at the data level instead of trying to add it later. That worked for me and I solved my problem. Even though I still feel a bit uncomfortable with it because adding color information to the data seems a bit like contaminating the information to me.
<br><br>Okay so my point being, and please remember i'm not a real expert on the vtkImagePlaneWidget or vtk in general (in fact far from it...) is it perhaps an option to add the color information to the data? As far as I understood the vtkImagePlaneWidget is a way to probe a dataset. Now as I read your question it seems to me that you want to add color at the probing step. At which point you are restricted to only use a lookuptable. Isn't it perhaps easier to add color information at the data level?
<br><br>This is just an uneducated suggestion, so please feel free to respond as to why this would not be possible etc.<br><br>Kind Regards - Geofram<br><br><div><span class="gmail_quote">On 6/11/07, <b class="gmail_sendername">
Peter Kok</b> <<a href="mailto:peter.kok@gmail.com">peter.kok@gmail.com</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hello Geofram,<br><br>Thanks for your reply. That is close to what I'm trying to do, but the problem is that my scalar values are scattered about a 32-bit range and it is not possible to create a lookup table that covers all values. I guess a vtkColorTransferFunction would work, but a vtkImagePlaneWidget only accepts vtkLookupTables...
<br><span class="sg"><br>-Peter<br><br>
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