[vtkusers] Applying different transfer functions to even/odd slices

[Lisa Avila]

Hello Rita,

Currently VTK supports only one set of transfer functions per component of 
your volume, and only supports multiple volumes that do not overlap. If you 
use the vtkFixedPointVolumeRayCastMapper which supports multiple 
components, you could break your odd and even slices out into separate 
components (using twice the memory though - you would need to insert 
"blank" slices in each component in between the "real" slices) and give 
each a separate transfer function.

Lisa


At 02:58 PM 5/27/2005, rywchiu wrote:
>Hi,
>
>I want to be able to apply different colour transfer functions for even 
>and odd slices of a 3D volume. The data that is being read is a MetaImage 
>with a single raw file. How could you go about doing this?
>
>Would I have to read even slices separately from odd slices? And does 
>vtkImageReader2::SetFileNameSpacing() work for a single raw file? And if 
>I'm reading even/odd slices separately, is it possible to output them back 
>together (after giving them different transfer functions) within the same 
>volume?
>
>Any suggestions are greatly appreciated!
>
>Thanks,
>Rita
>
>_______________________________________________
>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