<div dir="ltr">Can you try this experiment: <div><br></div><div>Keep the setting to performance but just turn on the Antialiasing if it is possible to change that setting individually? There you will find options as well. Try different options and let us know if you see the difference? </div>
<div><br></div><div>It could be either: z buffer precison issue or antialiasing issue if there is nothing special about your dataset. </div><div><br></div><div>Also, can you send us this dataset?</div><div><br></div><div>
- Aashish</div><div><br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Nov 12, 2013 at 11:57 PM, Frank Gao <span dir="ltr"><<a href="mailto:Frank.Gao@guidemia.com" target="_blank">Frank.Gao@guidemia.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang="EN-US" link="blue" vlink="purple"><div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","serif";color:#1f497d">Hi David,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","serif";color:#1f497d">I did a comparison between the nVidia card settings, and found out the differences with “Performance” and “Quality” preference. Please see the document below. <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","serif";color:#1f497d"><a href="https://www.dropbox.com/s/vwdgj44zz6y3w6w/nVIdiaCard_Setting_difference.docx" target="_blank">https://www.dropbox.com/s/vwdgj44zz6y3w6w/nVIdiaCard_Setting_difference.docx</a><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","serif";color:#1f497d">I am assuming there are some OpenGL calls to implement the difference, but don’t really know what to do. Hope this can provide some clues.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","serif";color:#1f497d">Best regards,<u></u><u></u></span></p><div class="im"><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","serif";color:#1f497d">Frank<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri","serif"">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri","serif""> <a href="mailto:vtkusers-bounces@vtk.org" target="_blank">vtkusers-bounces@vtk.org</a> [mailto:<a href="mailto:vtkusers-bounces@vtk.org" target="_blank">vtkusers-bounces@vtk.org</a>] <b>On Behalf Of </b>David E DeMarle<br>
<b>Sent:</b> Tuesday, November 12, 2013 4:43 PM<br><b>To:</b> <a href="mailto:Frank.Gao@guidemia.com" target="_blank">Frank.Gao@guidemia.com</a><br><b>Cc:</b> VTK Developers; VTK Users<br><b>Subject:</b> Re: [vtkusers] PolyData rendering problem<u></u><u></u></span></p>
<p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">What is the world space size of the triangles? Are they small enough to push the limits of GL float precision?<u></u><u></u></p></div><div><div class="h5">
<div><p class="MsoNormal"><br clear="all"><u></u><u></u></p><div><p class="MsoNormal">David E DeMarle<br>Kitware, Inc.<br>R&D Engineer<br>21 Corporate Drive<br>Clifton Park, NY 12065-8662<br>Phone: <a href="tel:518-881-4909" value="+15188814909" target="_blank">518-881-4909</a><u></u><u></u></p>
</div><p class="MsoNormal" style="margin-bottom:12.0pt"><u></u> <u></u></p><div><p class="MsoNormal">On Tue, Nov 12, 2013 at 6:10 PM, Frank Gao <<a href="mailto:Frank.Gao@guidemia.com" target="_blank">Frank.Gao@guidemia.com</a>> wrote:<u></u><u></u></p>
<blockquote style="border:none;border-left:solid #cccccc 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in"><div><div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","serif";color:#1f497d"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","serif";color:#1f497d">Hi All,</span><u></u><u></u></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","serif";color:#1f497d"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","serif";color:#1f497d">We are having some problems with the surface rendering in VTK. If the users don’t set their graphics card preference to “Quality”, the surface rendering will show a lot of “ghost” lines between the triangles, but they are not the polydata edges. Completely display artifact. When the triangles are small, this is much more obvious. I places a picture in the following link. The left one has problem. The right one is when preference is set to “quality”.</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","serif";color:#1f497d"> </span><u></u><u></u></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","serif";color:#1f497d"><a href="https://www.dropbox.com/s/1kvpzia57uggist/vtk_polydata_rendering_case.PNG" target="_blank">https://www.dropbox.com/s/1kvpzia57uggist/vtk_polydata_rendering_case.PNG</a></span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","serif";color:#1f497d"> </span><u></u><u></u></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","serif";color:#1f497d">Because of this we have to tell the users to change their graphics card setting. Is this something we can do in the code? Thanks a lot in advance.</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","serif";color:#1f497d"> </span><u></u><u></u></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","serif";color:#1f497d">Regards,</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","serif";color:#1f497d">Frank Gao</span><u></u><u></u></p></div></div><p class="MsoNormal" style="margin-bottom:12.0pt"><br>_______________________________________________<br>
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<br>Please keep messages on-topic and check the VTK FAQ at: <a href="http://www.vtk.org/Wiki/VTK_FAQ" target="_blank">http://www.vtk.org/Wiki/VTK_FAQ</a><br><br>Follow this link to subscribe/unsubscribe:<br><a href="http://www.vtk.org/mailman/listinfo/vtkusers" target="_blank">http://www.vtk.org/mailman/listinfo/vtkusers</a><u></u><u></u></p>
</blockquote></div><p class="MsoNormal"><u></u> <u></u></p></div></div></div></div></div><br>_______________________________________________<br>
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Please keep messages on-topic and check the VTK FAQ at: <a href="http://www.vtk.org/Wiki/VTK_FAQ" target="_blank">http://www.vtk.org/Wiki/VTK_FAQ</a><br>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br>| Aashish Chaudhary <br>| R&D Engineer <br>| Kitware Inc. <br>| <a href="http://www.kitware.com">www.kitware.com</a>
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