[Paraview] non-interactive viz on cluster

[David E DeMarle]

The error message indicates that pv batch can not connect the xwindows.
If the cluster is configured to run X for you, ensure that the job has the
correct DISPLAY environment variable.
If not, you should either start X in the job ("xinit pvbatch" or something
like that) or recompile paraview to use offscreen rendering.


On Saturday, July 18, 2015, Kharche, Sanjay <S.R.Kharche at exeter.ac.uk>
wrote:

>
> Dear All
>
> I need to non-interactively make png images of a series of sequentially
> numbered vts/vtk files. Since this is a large amount of data, I would like
> to do this using a cluster. The cluster has paraview and OpenFoam. I am not
> very familiar with OpenFoam, and have just started using Paraview in
> terms of python scripts. When I submit the job, I get an error. I gather
> that the error is because there is always a blank Paraview OpenGL window
> that opens when I use the script below. Can someone suggest a solution?
>
> thanks
> Sanjay
>
> error from the pbs job:
> ERROR: In
> /home/kitware/Kitware/ParaView-3.10/source/VTK/Rendering/vtkXOpenGLRenderWindow.cxx,
> line 541
> vtkXOpenGLRenderWindow (0x1ba5ad0): bad X server connection.
> DISPLAY=ERROR: In
> /home/kitware/Kitware/ParaView-3.10/source/VTK/Rendering/vtkXOpenGLRenderWindow.cxx,
> line 343
> vtkXOpenGLRenderWindow (0x1ba5ad0): bad X server connection. DISPLAY=
>
> My python script that I created using the GUI, and then edited for writing
> the png is below. I run it using the
> non screen rendering option:
>
> pvbatch --use-offscreen-rendering mouse2d.py &
>
> mouse2d.py is this:
>
> try: paraview.simple
> except: from paraview.simple import *
> paraview.simple._DisableFirstRenderCameraReset()
>
> # this does not make a difference to the viz.
> # SetActiveView(GetRenderView())
> # GetActiveView().UseOffscreenRenderingForScreenshots = 1
>
> # loop through all files.
> for i in range (1,3999):
>         mouse2D_SAN1_vts = XMLStructuredGridReader(
> FileName=['mouse2D_SAN%d.vts' % (i)] )
>         mouse2D_SAN1_vts.PointArrayStatus = ['Unnamed0']
>         RenderView1 = GetRenderView()
>         DataRepresentation1 = Show()
>         DataRepresentation1.EdgeColor = [0.0, 0.0, 0.5000076295109483]
>         RenderView1.CenterOfRotation = [78.0, 58.5, 0.0]
>         Transform1 = Transform( Transform="Transform" )
>         a1_Unnamed0_PVLookupTable = GetLookupTableForArray( "Unnamed0", 1,
> NanColor=[0.25, 0.0, 0.0], RGBPoints=[-0.01, 0.23, 0.299, 0.754, 1.0,
> 0.706, 0.016, 0.15], VectorMode='Magnitude', ColorSpace='Diverging',
> LockScalarRange=1 )
>         a1_Unnamed0_PiecewiseFunction = CreatePiecewiseFunction()
>         RenderView1.CameraPosition = [78.0, 58.5, 376.71107225273664]
>         RenderView1.CameraFocalPoint = [78.0, 58.5, 0.0]
>         RenderView1.CameraClippingRange = [372.94396153020926,
> 382.3617383365277]
>         RenderView1.CameraParallelScale = 97.5
>         DataRepresentation1.ColorArrayName = 'Unnamed0'
>         DataRepresentation1.LookupTable = a1_Unnamed0_PVLookupTable
>         Transform1.Transform = "Transform"
>         DataRepresentation2 = Show()
>         DataRepresentation2.ColorArrayName = 'Unnamed0'
>         DataRepresentation2.LookupTable = a1_Unnamed0_PVLookupTable
>         DataRepresentation2.EdgeColor = [0.0, 0.0, 0.5000076295109483]
>         DataRepresentation1.Visibility = 0
>
>         Transform1.Transform.Scale = [1.0, -1.0, 0.0]
>         RenderView1.CenterAxesVisibility = 0
>         RenderView1.CameraPosition = [78.0, -58.5, 376.71107225273664]
>         RenderView1.OrientationAxesVisibility = 0
>         RenderView1.CameraFocalPoint = [78.0, -58.5, 0.0]
>         RenderView1.CenterOfRotation = [78.0, -58.5, 0.0]
> #       Render()
>         WriteImage("dir_%i.png" % (i))
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-- 
David E DeMarle
Kitware, Inc.
R&D Engineer
21 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-881-4909
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