[Paraview-developers] LightViz - image resolution and WebGl

Albrecht Kyrieleis akyrieleis at gmail.com
Fri Apr 13 04:12:14 EDT 2018 

Hi, I have reinstalled Light-Viz using npm, 'LightViz -V' still gives
1.0.1, but in package.json is is 1.18.1. Using that version of LightViz
with --viewport-scale set to 2 in light-viz-cli (of the LightViz install)
does not change the blurriness of the data and orientation arrows.

In addition I have then edited light-viz-cli (of the LightViz install) to
call pvw-light-viz.py in the ParaView5-5 install and use the web dir there.
Executing LighViz resuleted in the following, but no change in appearance
of the data set.

$ LightViz --paraview /usr/local/share/ParaView-5.5.0-Qt5-MPI-Linux-64bit
-d data
ls: no such file or directory: /Applications
ls: no such file or directory: /usr/local/opt/

===============================================================================
| Execute:
| $ "/usr/local/share/ParaView-5.5.0-Qt5-MPI-Linux-64bit/bin/pvpython"
| -dr
| --force-offscreen-rendering
|
"/usr/local/share/ParaView-5.5.0-Qt5-MPI-Linux-64bit/share/paraview-5.5/web/lightviz/server/pvw-light-viz.py"
| --content
|
"/usr/local/share/ParaView-5.5.0-Qt5-MPI-Linux-64bit/share/paraview-5.5/web/lightviz/www"
| --port
| 8080
| --viewport-scale
| 2
| --data
| "data"
===============================================================================

wslink: Starting factory
CRITICAL:twisted:wslink: Starting factory


Thank you
Albrecht


On 12 April 2018 at 22:57, Sebastien Jourdain <
sebastien.jourdain at kitware.com> wrote:

> The expected version is 1.18.1 which definitely explain what you may run
> into such issue.
>
> But with the old version I would have expected the Python script to
> complain about that unknown argument.
> Also the Python is not enough. The Python (server) and the JavaScript
> (client) need to match.
>
> The command line should looks like: (I've added new line for readability)
>
> # the actual patch should be validated to match your system
> PV_WEB=/usr/local/share/ParaView-5.5.0-Qt5-MPI-Linux-64bit/share/web
>
> /usr/local/share/ParaView-5.5.0-Qt5-MPI-Linux-64bit/lib/pvpython -dr
> --force-offscreen-rendering
>      $PV_WEB/light-viz/server/pvw-light-viz.py
>      --content $PV_WEB/light-viz/www
>      --port 8080 --viewport-scale 2 --data data
>
>
>
> On Thu, Apr 12, 2018 at 3:41 PM, Albrecht Kyrieleis <akyrieleis at gmail.com>
> wrote:
>
>> 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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>>
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