[Paraview-developers] LightViz - image resolution and WebGl
Albrecht Kyrieleis
akyrieleis at gmail.com
Thu Apr 12 17:41:02 EDT 2018
The LightViz versio installed is 1.0.0.
I copied pvw-light-viz.py from the ParaView installation to the LightViz
installation (replacing the file in dir server), but still no effect.
Thanks
Albrecht
On 12 April 2018 at 20:20, Sebastien Jourdain <sebastien.jourdain at kitware.
com> wrote:
> I'm seeing that you are using your light-viz (/usr/lib/node_modules/light-
> viz/server/pvw-light-viz.py)
>
> Can you try to use the one that is bundle with ParaView 5.5?
> Do you know which version of LightViz you are using with PV5.5?
>
> On Thu, Apr 12, 2018 at 1:15 PM, Albrecht Kyrieleis <akyrieleis at gmail.com>
> wrote:
>
>> Using ps aux | grep pvpython it seems ok:
>>
>> albrech+ 17686 10.9 1.6 2151904 269348 pts/3 Sl+ 20:07 0:19
>> /usr/local/share/ParaView-5.5.0-Qt5-MPI-Linux-64bit/lib/pvpython -dr
>> --force-offscreen-rendering /usr/lib/node_modules/light-viz/server/pvw-light-viz.py
>> --content /usr/lib/node_modules/light-viz/dist --port 8080
>> --viewport-scale 2 --data data
>>
>> I have tried to increase the max resolution be passing additional
>> arguments in light-viz-cli , but no effect.
>>
>> Albrecht
>>
>>
>> On 12 April 2018 at 18:51, Sebastien Jourdain <
>> sebastien.jourdain at kitware.com> wrote:
>>
>>> When you run "ps aux | grep pvpython" do you see that argument properly
>>> passed?
>>>
>>> This is where that argument should be used
>>> https://github.com/Kitware/light-viz/blob/master/server/pvw-
>>> light-viz.py#L183
>>>
>>> Is the resolution you are trying to use bigger than the default below?
>>> https://github.com/Kitware/light-viz/blob/master/server/pvw-
>>> light-viz.py#L160-L161
>>>
>>>
>>>
>>> On Thu, Apr 12, 2018 at 11:45 AM, Albrecht Kyrieleis <
>>> akyrieleis at gmail.com> wrote:
>>>
>>>> Thank you, Seb
>>>>
>>>> I've installed the server on Linux, but view the data in using Chrome
>>>> browser under Windows7. In light-viz-cli.js I modified :
>>>>
>>>> const cmdLine = [
>>>> quotePath(pvPythonExecs[0]),
>>>> '-dr',
>>>> '--force-offscreen-rendering',
>>>> quotePath(path.normalize(path.join(__dirname,
>>>> '../server/pvw-light-viz.py'))),
>>>> '--content', quotePath(path.normalize(path.join(__dirname,
>>>> '../dist'))),
>>>> '--port', program.port,
>>>> '--viewport-scale', 2,
>>>> ];
>>>>
>>>> but this dose not seem to have an effect when restarting the server.
>>>>
>>>> Thank you
>>>>
>>>> Albrecht
>>>>
>>>> On 12 April 2018 at 18:08, Sebastien Jourdain <
>>>> sebastien.jourdain at kitware.com> wrote:
>>>>
>>>>> Hi Albrecht,
>>>>>
>>>>> I'm glad you managed to use LightViz with a local installation. Maybe
>>>>> the best place to talk about LightViz would be the Issue tracker on Github,
>>>>> but here is fine too (although the paraview-user mailing list might be
>>>>> better for the mailing side).
>>>>>
>>>>> q1) I believe you are on Mac with a retina display. The issue is
>>>>> related to the reported size between the browser and what VTK/ParaView
>>>>> render. To solve it, you can provide additional argument when running
>>>>> light-viz to double the resolution. For that just add "--viewport-scale 2"
>>>>> in the generated command line as the JS cli does not have that arg
>>>>> built-in. (I guess I forgot to add it like in visualizer
>>>>> https://github.com/Kitware/visualizer/blob/master/bin/pvw-vi
>>>>> sualizer-cli.js#L40 and https://github.com/Kitware/vis
>>>>> ualizer/blob/master/bin/pvw-visualizer-cli.js#L125-L136)
>>>>>
>>>>> q2) No but Visualizer give you the option to either do "remote
>>>>> rendering" or "local rendering" (webgl). It would be possible to extend
>>>>> LightViz to switch its renderer like Visualizer is doing.
>>>>>
>>>>> q3) Are you thinking frustrum selection or just surface? In either
>>>>> case, you will need to create a new module. The capability exist within
>>>>> ParaView but you will have to wire them between the Web UI and the
>>>>> processing that needs to happen on the server side. And if you are not
>>>>> familiar with ParaView, that might be a daunting task. But we can help...
>>>>>
>>>>> Thanks for reaching out,
>>>>>
>>>>> Seb
>>>>>
>>>>> On Thu, Apr 12, 2018 at 10:28 AM, Albrecht Kyrieleis <
>>>>> akyrieleis at gmail.com> wrote:
>>>>>
>>>>>> Hi,
>>>>>> I have installed LightViz and want to modify it to fit exactly our
>>>>>> needs. Not sure whether this mailing-list is the right one.
>>>>>>
>>>>>> I have installed LightViz and Paraview-5.5(Linux CentOS) and can
>>>>>> import a vtk data file using the --add-dataset option. Visualization and
>>>>>> function of LightViz is great. But I have three questions:
>>>>>>
>>>>>> - the dataset looks a bit blurry and the orientation arrows are
>>>>>> always quite blurry. How can I fix this ?
>>>>>> - Is LightViz actuallly using WebGl ? If not, how can I modify it to
>>>>>> use WebGl and can one hope to get improved performance compared to the
>>>>>> standard installation ?
>>>>>> - I would like to add a new feature that allows marking with the
>>>>>> mouse an area on the dataset and will return the average/Min/Max value of
>>>>>> the data points enclosed. Is there some module already existing which I can
>>>>>> bring in for this task ?
>>>>>>
>>>>>>
>>>>>> Thank you very much
>>>>>>
>>>>>> Albrecht
>>>>>>
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>>>>>>
>>>>>
>>>>
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>>
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