<div dir="ltr">Hi folks,<div><br></div><div>To close the loop on this, these bugs have been fixes. Thanks TJ Corona.</div><div><br></div><div>-berk</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Aug 13, 2015 at 12:20 AM, Gabe Weymouth <span dir="ltr"><<a href="mailto:G.D.Weymouth@soton.ac.uk" target="_blank">G.D.Weymouth@soton.ac.uk</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Great. Thanks for letting me know.</div><div class="gmail_extra"><span class=""><br clear="all"><div><div><div dir="ltr"><font face="times new roman, serif"><b>Gabriel D Weymouth</b></font><div><div><div><font size="2" face="times new roman, serif">Southampton Marine and Maritime Institute Lecturer<br></font></div><div><font size="2" face="times new roman, serif">University of Southampton</font></div><div><font size="2" face="times new roman, serif">Boldrewood Campus, Building 176, Room 3029<br></font></div><div><font size="2" face="times new roman, serif">Southampton, SO16 7QF, UK</font></div></div></div></div></div></div>
<br></span><div class="gmail_quote"><span class="">On Thu, Aug 13, 2015 at 5:25 AM, Berk Geveci <span dir="ltr"><<a href="mailto:berk.geveci@kitware.com" target="_blank">berk.geveci@kitware.com</a>></span> wrote:<br></span><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">I have a fix for the clip issue in the works - clip has not worked with 2D image data in quite a while. There is another bug where clip crashes unless the 2D image is on the x-y plane. We will work on a fix for that also.<br>
<br>
Best,<br>
-berk<br>
</span><div><div class="h5"><div><div><br>
On Thu, Jun 18, 2015 at 7:43 AM, Gabe Weymouth <<a href="mailto:G.D.Weymouth@soton.ac.uk" target="_blank">G.D.Weymouth@soton.ac.uk</a><mailto:<a href="mailto:G.D.Weymouth@soton.ac.uk" target="_blank">G.D.Weymouth@soton.ac.uk</a>>> wrote:<br>
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.<br>
<br>
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.<br>
<br>
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.<br>
<br>
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.<br>
<br>
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.<br>
<br>
<br>
Gabriel D Weymouth<br>
Southampton Marine and Maritime Institute Lecturer<br>
University of Southampton<br>
Boldrewood Campus, Building 176, Room 3029<br>
Southampton, SO16 7QF, UK<br>
<br>
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