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Hello Sandip,<br><br>
I assume you are using a volume mapper to render the data? You'll need to
either switch mappers (use the vtkVolumeTextureMapper2D instead of the
vtkVolumeRayCastMapper - this is usually faster) or use some
level-of-detail approach (using reduced resolution data sets, less rays
cast, etc) to improve performance. You may want to download VolView from
<a href="http://www.kitware.com/" eudora="autourl">www.kitware.com</a> to
see how an LOD volume rendering strategy works in an application (load
your data and see the speed / quality VolView is able to provide). You
should be able to achieve something similar with VTK.<br><br>
Lisa<br>
<br><br>
At 12:38 AM 3/3/2004, sandip goyal wrote:<br>
<blockquote type=cite class=cite cite>Hi VtkUsers,<br>
I am working on the tomography data .My problem is to make the objects
transparent depending on the gray level selected by the user from
histogram .,i.e I want to make the data of particular gray values to
become transparent. For this I used<br>
<br>
vtkTransferfunction SetPoint property and assigned the opacity to
the volume property . But this method causes my system to become too slow
& I am not able to do it iteractively with the mouse. <br>
<br>
Please suggest the method <br>
<br>
Thanking You in advance<br>
Sandip Goyal <br><br>
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