<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">2016-08-25 18:43 GMT+02:00 Elvis Stansvik <span dir="ltr"><<a href="mailto:elvis.stansvik@orexplore.com" target="_blank">elvis.stansvik@orexplore.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><span class="">2016-08-25 18:36 GMT+02:00 Róbert Špir <span dir="ltr"><<a href="mailto:spir.robert@gmail.com" target="_blank">spir.robert@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div link="blue" vlink="purple" lang="SK"><div><p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri",sans-serif" lang="EN-US">it works ok after switching to qvtkwidget2, even the multisampling under linux, which wasn’t working with qvtkwidget</span></p></div></div></blockquote><div><br></div></span><div>Ah, that's good to know. I believe when I was having the problem, I was working through Python, so was using QVTKRenderWindowInteractor (or maybe my own similar class), which is yet another thing (QVTKWidget / QVTKWidget2 are not wrapped).<br><br></div><div>Glad it worked out anyway. Nowadays I'm using C++ and QVTKWidget2 too.<span class=""><font color="#888888"><br></font></span></div></div></div></div></blockquote><div><br></div><div>I was actually wrong. I had a look at my code, and I'm using QVTKWidget (not QVTKWidget2), and what I did to get around problems with Z-ordering and also to get multisampling working reliably was this (from the constructor of my QVTKWidget subclass):<br><br> QSurfaceFormat surfaceFormat = windowHandle()->format();<br> surfaceFormat.setSamples(8);<br> surfaceFormat.setStencilBufferSize(8);<br> windowHandle()->setFormat(surfaceFormat);<br><br></div><div>Hope that helps someone else using QVTKWidget.<br><br></div><div>Elvis<br> <br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><div><span class=""><font color="#888888"><br></font></span></div><span class=""><font color="#888888"><div>Elvis<br></div></font></span><div><div class="h5"><div> <br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div link="blue" vlink="purple" lang="SK"><div><p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri",sans-serif" lang="EN-US"><u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri",sans-serif"><u></u> <u></u></span></p><p class="MsoNormal"><b><span style="font-size:11pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11pt;font-family:"Calibri",sans-serif"> Elvis Stansvik [mailto:<a href="mailto:elvis.stansvik@orexplore.com" target="_blank">elvis.stansvik@orexplo<wbr>re.com</a>] <br><b>Sent:</b> Thursday, August 25, 2016 6:24 PM<br><b>To:</b> RobertS <<a href="mailto:spir.robert@gmail.com" target="_blank">spir.robert@gmail.com</a>><br><b>Cc:</b> VTK Users <<a href="mailto:vtkusers@vtk.org" target="_blank">vtkusers@vtk.org</a>>; Ken Martin <<a href="mailto:ken.martin@kitware.com" target="_blank">ken.martin@kitware.com</a>></span></p><div><div><br><b>Subject:</b> Re: [vtkusers] Z-fighting problem on intel hd graphics<u></u><u></u></div></div><p></p><div><div><p class="MsoNormal"><u></u> <u></u></p><p>Den 25 aug. 2016 5:35 em skrev "Róbert Špir" <<a href="mailto:spir.robert@gmail.com" target="_blank">spir.robert@gmail.com</a>>:<br>><br>> ok, everything works fine without qvtkwidget, so the problem is somewhere there<u></u><u></u></p><p>I don't remember exactly, but I think I had the same problem. Should be somewhere on this list I think.<u></u><u></u></p><p>I think it's possible to work around by manually setting the stencil buffer size on the QGLFormat used by the widget.<u></u><u></u></p><p>On the bus at the moment so have limited ability to search.<u></u><u></u></p><p>Elvis<u></u><u></u></p><p>><br>> <br>><br>> From: Róbert Špir [mailto:<a href="mailto:spir.robert@gmail.com" target="_blank">spir.robert@gmail.com</a>] <br>> Sent: Thursday, August 25, 2016 2:56 PM<br>> To: 'Ken Martin' <<a href="mailto:ken.martin@kitware.com" target="_blank">ken.martin@kitware.com</a>><br>> Cc: 'vtk' <<a href="mailto:vtkusers@vtk.org" target="_blank">vtkusers@vtk.org</a>><br>> Subject: RE: [vtkusers] Z-fighting problem on intel hd graphics<br>><br>> <br>><br>> I made a few more tests:<br>><br>> the same problem happens with llvmpipe and with nvidia with nouveau driver<br>><br>> doesn’t happen on nvidia binary driver or in OS X with intel or nvidia or in windows with intel or nvidia<br>><br>> So maybe it’s a bug in mesa? Currently I’m using qt5 with qvtkwidget, I will try to create minimalistic example without qt to see if the problem is reproducible<br>><br>> <br>><br>> From: Ken Martin [mailto:<a href="mailto:ken.martin@kitware.com" target="_blank">ken.martin@kitware.com</a><wbr>] <br>> Sent: Tuesday, August 23, 2016 6:45 PM<br>> To: RobertS <<a href="mailto:spir.robert@gmail.com" target="_blank">spir.robert@gmail.com</a>><br>> Cc: vtk <<a href="mailto:vtkusers@vtk.org" target="_blank">vtkusers@vtk.org</a>><br>> Subject: Re: [vtkusers] Z-fighting problem on intel hd graphics<br>><br>> <br>><br>> This sounds like a driver issue. I suppose you could try setting the following environment variable<br>><br>> <br>><br>> GALLIUM_DRIVER=llvmpipe<br>><br>> <br>><br>> to switch to software rendering and see if the problem goes away. If nvidia and mesa llvmpipe both work on your linux system then I would really suspect the intel linux driver.<br>><br>> <br>><br>> <br>><br>> <br>><br>> On Wed, Aug 17, 2016 at 6:17 AM, RobertS <<a href="mailto:spir.robert@gmail.com" target="_blank">spir.robert@gmail.com</a>> wrote:<br>>><br>>> Hi all,<br>>> I'm doing simple visualization of data on rectangular grid by creating<br>>> vtkpolydata from single vtktrianglestrip and when running the application in<br>>> linux on intel hd graphics there is serious problem with z-fighting where<br>>> the parts that should be far away are overlapping parts that are near the<br>>> camera. This doesn't happen when running on windows (intel or nvidia) or on<br>>> linux with nvidia<br>>> here you can see the problem, the camera angle is still the same<br>>> <a href="http://tesla.math.sk/intel1.jpg" target="_blank">http://tesla.math.sk/intel1.jp<wbr>g</a> <<a href="http://tesla.math.sk/intel1.jpg" target="_blank">http://tesla.math.sk/intel1.j<wbr>pg</a>><br>>> <a href="http://tesla.math.sk/nvidia1.jpg" target="_blank">http://tesla.math.sk/nvidia1.j<wbr>pg</a> <<a href="http://tesla.math.sk/nvidia1.jpg" target="_blank">http://tesla.math.sk/nvidia1.<wbr>jpg</a>><br>>> another angle<br>>> <a href="http://tesla.math.sk/intel2.jpg" target="_blank">http://tesla.math.sk/intel2.jp<wbr>g</a> <<a href="http://tesla.math.sk/intel2.jpg" target="_blank">http://tesla.math.sk/intel2.j<wbr>pg</a>><br>>> <a href="http://tesla.math.sk/nvidia2.jpg" target="_blank">http://tesla.math.sk/nvidia2.j<wbr>pg</a> <<a href="http://tesla.math.sk/nvidia2.jpg" target="_blank">http://tesla.math.sk/nvidia2.<wbr>jpg</a>><br>>> this happens on vtk 7.0 and also on vtk 7.1 from git<br>>> tested hardware is intel hd graphics on haswell, and ivy bridge (mesa 11.2<br>>> and 12.0 with opengl 3.3) and on broadwell with mesa 12.0 with opengl 4.4<br>>> Is this a known issue or am I doing something wrong?<br>>><br>>><br>>><br>>> --<br>>> View this message in context: <a href="http://vtk.1045678.n5.nabble.com/Z-fighting-problem-on-intel-hd-graphics-tp5739803.html" target="_blank">http://vtk.1045678.n5.nabble.c<wbr>om/Z-fighting-problem-on-intel<wbr>-hd-graphics-tp5739803.html</a><br>>> Sent from the VTK - Users mailing list archive at Nabble.com.<br>>> ______________________________<wbr>_________________<br>>> Powered by <a href="http://www.kitware.com" target="_blank">www.kitware.com</a><br>>><br>>> Visit other Kitware open-source projects at <a href="http://www.kitware.com/opensource/opensource.html" target="_blank">http://www.kitware.com/opensou<wbr>rce/opensource.html</a><br>>><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_FA<wbr>Q</a><br>>><br>>> Search the list archives at: <a href="http://markmail.org/search/?q=vtkusers" target="_blank">http://markmail.org/search/?q=<wbr>vtkusers</a><br>>><br>>> Follow this link to subscribe/unsubscribe:<br>>> <a href="http://public.kitware.com/mailman/listinfo/vtkusers" target="_blank">http://public.kitware.com/mail<wbr>man/listinfo/vtkusers</a><br>><br>><br>><br>> <br>><br>> --<br>><br>> Ken Martin PhD<br>><br>> Chairman & CFO<br>> Kitware Inc.<br>> 28 Corporate Drive<br>> Clifton Park NY 12065<br>> <a href="tel:518%20371%203971" value="+15183713971" target="_blank">518 371 3971</a><br>><br>> <br>><br>> This communication, including all attachments, contains confidential and legally privileged information, and it is intended only for the use of the addressee. 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