<div dir="ltr"><div><div><div><div>Hi Mark, <br><br></div>Did you check the input grid to see if any cells in there are inverted?<br><br></div>If you can share the data set and the workflow, I can take a look to see where the problem occurred.<br><br></div>Best,<br></div>Andy<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, May 14, 2015 at 6:17 PM, Mark Cartwright <span dir="ltr"><<a href="mailto:mcartwright@microseismic.com" target="_blank">mcartwright@microseismic.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Andy,</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> Thanks for the quick reply – that unstructured grid was output from vtkClipDataSet. I did not think to try the Mesh Quality filter – I will try that.</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> This is the first ugrid that I have seen this happen to, we are using clipdataset to slice a reservoir model ugrid using a geologic horizon. Many of these
jobs have been run with good results. </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> If you would like I could send you the input data and VTK flow.
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Thanks,</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Mark</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Andy Bauer [mailto:<a href="mailto:andy.bauer@kitware.com" target="_blank">andy.bauer@kitware.com</a>]
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<b>Sent:</b> Thursday, May 14, 2015 4:56 PM<br>
<b>To:</b> Mark Cartwright<br>
<b>Cc:</b> <a href="mailto:paraview@paraview.org" target="_blank">paraview@paraview.org</a><br>
<b>Subject:</b> Re: [Paraview] Integrate Variables filter generates negative volume for UnstructuredGrid</span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Hi Mark,</p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">It looks like some of your cells are inverted in their canonical ordering. You can use the Mesh Quality filter to see the tets that have negative volumes.
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<p class="MsoNormal">Probably the easiest way to fix the cells canonical ordering would be using Programmable Filter.</p>
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<p class="MsoNormal">Regards,</p>
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<p class="MsoNormal">Andy</p>
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<p class="MsoNormal">On Thu, May 14, 2015 at 5:30 PM, Mark Cartwright <<a href="mailto:mcartwright@microseismic.com" target="_blank">mcartwright@microseismic.com</a>> wrote:</p>
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<p class="MsoNormal">Hello,</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"> I have an unstructured grid that oddly produces a negative volume – I’ve looked for degenerate cells, etc. But cannot find anything obvious.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"> The file is attached, it’s a very small grid of approx.. 1500 cells, I’ve removed the data arrays – they integrated negative too – but this did not resolve the issue with the volume being < 0.</p>
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<p class="MsoNormal"> I am look at vtkIntegrateAttributes now and will post if I find anything.
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<p class="MsoNormal"> Happy bug hunting,</p>
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<p class="MsoNormal">Mark</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"> </p>
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