Hi Gabe, Thank you for providing the sample data set. I see the same problem with the clipping filter you report. In fact, I believe this bug in the bug tracker is related [1]. To work around this, you could run the Extract Surface filter and clip by scalars.
As for the problem you report with opacity mapping on surfaces, I do see problems with the Slice representation on the original data while setting opacity below the 0 data value to 0 and the opacity above 0 to 1. If I change the representation to Surface, the opacity mapping seems to work as expected. I hope that helps, Cory [1] http://www.vtk.org/Bug/view.php?id=13712 On Fri, Jun 19, 2015 at 5:31 AM, Gabe Weymouth <[email protected]> wrote: > Ok, I've put a sample up on dropbox. Note that this uses the > "format=append" - I'm not sure if the binary data will be readable if > you're using a different system. > > > sample.vti <https://www.dropbox.com/s/9ht9zr9njulpstn/sample.vti?dl=0> > > > > On Jun 18, 2015 11:10 PM, "Berk Geveci" <[email protected]> wrote: > >> Can you share the dataset with us? >> >> Best, >> -berk >> >> On Thu, Jun 18, 2015 at 7:43 AM, Gabe Weymouth <[email protected] >> <mailto:[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<http://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 >> >> >> > _______________________________________________ > 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 > > -- Cory Quammen R&D Engineer Kitware, Inc.
_______________________________________________ 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
