Hi,
you forget to call Render() before and after the ResetCamera().
Seb
On Sat, Feb 19, 2011 at 9:59 AM, Tim Gallagher <tim.gallag...@gatech.edu> wrote:
> Without looking at the script in detail, have you tried using the Python
> Trace feature in the GUI? Since, at this stage anyway, all of your tasks are
> straight forward, you can do them in the GUI with the trace turned on, then
> look at the resulting script to show you how all of it is done.
>
> That is, by far, the easiest way to learn how to script Paraview.
>
> Try the following script:
>
> >from paraview.simple import *
> >
> >rv = GetRenderView() # Get a connection to the render window
> >reader = OpenDataFile(PATH+'lfff00300000p_QC.vts')
> >reader.Update() # Actually read the file in and update the pipeline
> >contourFilter = Contour(reader)
> >contourFilter.ContourBy = 'velocity'
> >contourFilter.Isosurfaces = [0.0005, 0.001]
> >dr = Show() # Update the pipeline again, but we need to alter how it looks
> >lookupTable = CreateLookupTable( RBGPoints=[<minval to show>, 0.0, 0.0,
> 0.0, <maxval to show>, 1.0, 1.0, 1.0], VectorMode='Magnitude',
> ColorSpace='RGB', ScalarRangeInitialized=1.0) # This creates the color map,
> going from back to white
> >dr.ColorArrayName = '<data array name to show>' # Tell it how you want
> contours colored
> >dr.ColorAttributeType = '<POINT_DATA or CELL_DATA>' # Tell it the type of
> data it is coloring
> >ResetCamera()
> >WriteImage('picture.png')
> >servermanager.SaveState('pythonstate.pvsm')
>
> That is something like what you need to do (I can't promise it works, but it
> will get you close -- I've never used a script with the Contour filter).
> Again, do what you are trying to do in the GUI with trace turned on and see
> what it outputs. You'll see some extra steps along the lines of what I added
> that should get you up and running.
>
> Tim
>
> ----- Original Message -----
> From: "Hartwig Anzt" <hartwig.a...@kit.edu>
> To: paraview@paraview.org
> Sent: Saturday, February 19, 2011 9:15:35 AM
> Subject: [Paraview] scripting beginner
>
> Hi!
>
> I am real beginner in paraview scripting. Up to now, I used the paraview
> graphic platform, but since the tasks are getting more complex, I wanted
> to use paraview scripting with python.... and failed.
>
> What I want to do:
> - Load .vts-data
> - Create Contour
> - Set Data Range
> - Save State/Save Picture
>
> I wrote the following script:
>
> >from paraview.simple import *
> >
> >reader = OpenDataFile(PATH+'lfff00300000p_QC.vts')
> >contourFilter = Contour(reader)
> >contourFilter.ContourBy = 'velocity'
> >contourFilter.Isosurfaces = [0.0005, 0.001]
> >Show(contourFilter)
> >ResetCamera()
> >WriteImage('picture.png')
> >servermanager.SaveState('pythonstate.pvsm')
>
>
> If I run the script, two errors occur, probably with the same reason.
> The writer says:
> vtkSMRenderViewProxy (0x1e6da30): Disabling offscreen rendering since
> empty image was detected.
>
> When I open the state, there is nothing displayed. in order to see
> anything, I do have to press "Apply" for the Contour filter and "Reset"
> for the Camera, then everything looks fine.
>
> How can I implement, that these two operations are conducted?
>
> Thanks, Hartwig
>
> --
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> Karlsruhe Institute of Technology (KIT)
> Engineering Mathematics and Computing Lab (EMCL) &
> Institute for Applied and Numerical Mathematics 4
>
> Dipl.-Math. techn. Hartwig Anzt
> Research Associate
>
> Fritz-Erler-Str. 23, Geb. 01.86
> 76133 Karlsruhe, Germany
>
> Phone: +49 721 / 608 - 45849
> Email: hartwig.a...@kit.edu
> Web: http://numhpc.math.kit.edu, http://emcl.kit.edu,
>
> KIT - University of the State of Baden-Wuerttemberg and
> National Laboratory of the Helmholtz Association
>
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