Can you share the dataset with us? Best, -berk
On Thu, Jun 18, 2015 at 7:43 AM, Gabe Weymouth <[email protected]> wrote: > I downloaded the newest stable build of paraview yesterday (upgrading from > 4.1) so I could utilize the new features in pvpython (Screenshot, etc). > Unfortunately, I ran into what appears to be a bug in the handling of > clipping/opacity for vti files. > > I have a 2D field that ranges from -20 to 110 and I need to isolate the > negative regions and discard the positive regions. I do this by clipping > (type: scalar, value: 0, inside out). In the new version, this clips the > entire field - nothing remains. > > An alternative method that smooths out the transition is to map the scalar > from -2 to 2, setting zero opacity at 2. In the new version of paraview, > this blanks out both the positive and negative values, leaving only the > region between -2 to 2. A color map without opacity works as expected, and > the legend shows the correct opacity behaviour. > > Playing around with the range of the transfer function, the negative > values begin to blank out when the positive limit is set below 20. This > would seem to indicate a bug in the application of the transfer function to > the image grid surface render. > > If I repeat the tests using a vtr file and identical data, both clipping > and opacity work as expected. I see the same results on my mac and linux > workstation. > > > *Gabriel D Weymouth* > Southampton Marine and Maritime Institute Lecturer > University of Southampton > Boldrewood Campus, Building 176, Room 3029 > Southampton, SO16 7QF, UK > > _______________________________________________ > Powered by www.kitware.com > > Visit other Kitware open-source projects at > http://www.kitware.com/opensource/opensource.html > > Please keep messages on-topic and check the ParaView Wiki at: > http://paraview.org/Wiki/ParaView > > Search the list archives at: http://markmail.org/search/?q=ParaView > > Follow this link to subscribe/unsubscribe: > http://public.kitware.com/mailman/listinfo/paraview > >
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