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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi,
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">What is the change in vtk8 that means the composite function doesn’t exist ? what do I use instead?
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thanks<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Traceback (most recent call last):<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> File "./vtktomo.py", line 84, in <module><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> compositeFunction = vtk.vtkVolumeRayCastCompositeFunction()<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">AttributeError: module 'vtk' has no attribute 'vtkVolumeRayCastCompositeFunction'<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> vtkusers [mailto:vtkusers-bounces@vtk.org]
<b>On Behalf Of </b>Robert.Atwood@diamond.ac.uk<br>
<b>Sent:</b> 27 April 2018 16:06<br>
<b>To:</b> 'Max Smolens'<br>
<b>Cc:</b> vtkusers@vtk.org<br>
<b>Subject:</b> Re: [vtkusers] Python/VTK offscreen / headless rendering<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thanks Max, that seems to install if I use a conda enviromnet to avoid messing up other users
</span><span style="font-size:11.0pt;font-family:Wingdings;color:#1F497D">J</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">conda create --prefix /path/to/my/local/env<o:p></o:p></p>
<p class="MsoNormal">source activate /path/to/my/local/env<o:p></o:p></p>
<p class="MsoNormal">conda config --add channels conda-forge<o:p></o:p></p>
<p class="MsoNormal">conda install mesalib vtk<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">It’s still installing – but it looks like then I have to update to Python 3 and vtk 8 ????
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Max Smolens [mailto:max.smolens@kitware.com]
<br>
<b>Sent:</b> 27 April 2018 14:52<br>
<b>To:</b> Atwood, Robert (DLSLtd,RAL,SCI)<br>
<b>Cc:</b> Paul Korir; vtkusers@vtk.org<br>
<b>Subject:</b> Re: [vtkusers] Python/VTK offscreen / headless rendering<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hi Robert,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">The conda-forge channel includes a variant of the vtk package that supports offscreen rendering with OSMesa. This variant is chosen automatically if the mesalib package is installed when installing vtk:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<blockquote style="margin-left:30.0pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt">
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<p class="MsoNormal">conda config --add channels conda-forge<o:p></o:p></p>
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<p class="MsoNormal">conda install mesalib vtk<o:p></o:p></p>
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</blockquote>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">HTH,<o:p></o:p></p>
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<p class="MsoNormal">Max<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Fri, Apr 27, 2018 at 7:16 AM, <a href="mailto:Robert.Atwood@diamond.ac.uk">
Robert.Atwood@diamond.ac.uk</a> <<a href="mailto:Robert.Atwood@diamond.ac.uk" target="_blank">Robert.Atwood@diamond.ac.uk</a>> wrote:<o:p></o:p></p>
<p class="MsoNormal">Hi, Paul<br>
The difference is to get to the point where there is something rendered, without having to open a window on the terminal.
<br>
In the case where I already know (or can calculate from the image data) the colour function and the transparency function, I know what camera angle I want and so on, I just want to run a background job on a remote workstation/cluster node to render that same
view for a number of similar images (of the same object in different time steps) Instead of sitting on my computer watching it.
<br>
<br>
But, the problem is that with the way I know how to do it, the creation of the render window trys to get a GL context, but it can't do that .
<br>
<br>
If I try in python on a X-window connection even, I get the following <br>
ERROR: In /home/ilan/minonda/conda-bld/work/VTK-6.3.0/Rendering/OpenGL/vtkXOpenGLRenderWindow.cxx, line 394<br>
vtkXOpenGLRenderWindow (0x7f47c0fda000): Could not find a decent visual<br>
<br>
<br>
But maye the capability isn't compiled into the python package from Anaconda?? <br>
Is there a python package I can grab that has software rendering? <br>
<br>
<br>
<br>
<br>
I tried to buld the c++ from source of 7.1.1. But not successfully. ..<br>
<br>
./CylinderRenderingProperties <br>
ERROR: In /dls/science/users/kny48981/sources/vtk/VTK-7.1.1/Rendering/OpenGL2/vtkXOpenGLRenderWindow.cxx, line 320<br>
vtkXOpenGLRenderWindow (0xfc18a0): Could not find a decent config<br>
<br>
<br>
<br>
<br>
<br>
<br>
<span class="im">> -----Original Message-----</span><br>
<span class="im">> From: Paul Korir [mailto:<a href="mailto:pkorir@ebi.ac.uk">pkorir@ebi.ac.uk</a>]</span><br>
<span class="im">> Sent: 27 April 2018 11:09</span><br>
<span class="im">> To: Atwood, Robert (DLSLtd,RAL,SCI); '<a href="mailto:vtkusers@vtk.org">vtkusers@vtk.org</a>'</span><br>
<span class="im">> Subject: Re: [vtkusers] Python/VTK offscreen / headless rendering</span><br>
<span class="im">> </span><br>
<span class="im">> How different is what you need from writing the rendered output directly</span><br>
<span class="im">> to a file using one of the vtk*Writer classes?</span><br>
<span class="im">> </span><br>
<span class="im">> Correct me if I'm missing something.</span><br>
<span class="im">> </span><br>
<span class="im">> Paul K. Korir, PhD</span><br>
<span class="im">> Scientific Programmer</span><br>
<span class="im">> EMBL-EBI</span><br>
<span class="im">> 01223494422</span><br>
<span class="im">> </span><br>
<span class="im">> On 23/04/2018 11:52, <a href="mailto:Robert.Atwood@diamond.ac.uk">
Robert.Atwood@diamond.ac.uk</a> wrote:</span><br>
<span class="im">> > Hi,</span><br>
<span class="im">> > I would like to have a Python script to render several volume images</span><br>
<span class="im">> (tomography data) on a headless machine. I could not find any advice more</span><br>
<span class="im">> recent than 2011 , is this something that just isn't configured in the Python as</span><br>
<span class="im">> installed from existing packages? How do I tell?</span><br>
<span class="im">> > If it's not in the python , what needs to be done, at the time of prior</span><br>
<span class="im">> questions it seemed to be a compile-time option of the VTK library, is that</span><br>
<span class="im">> still the case, Any exaples on line that are for the current release ?</span><br>
<span class="im">> > Thanks</span><br>
<span class="im">> > Robert</span><br>
<span class="im">> ></span><br>
<span class="im">> ></span><br>
<span class="im">> ></span><br>
<br>
<br>
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