== !ParaView
[[PageOutline]]

[[Image(https://trac.version.fz-juelich.de/vis/raw-attachment/wiki/WikiStart/ParaView_Catalyst_logos.png, 450px, align=right, margin=10, link=wiki:ParaView)]]

"!ParaView is an open-source, multi-platform application designed to visualize data sets of varying sizes from small to very large. The goals of the !ParaView project include developing an open-source, multi-platform visualization application that supports distributed computational models to process large data sets. It has an open, flexible, and intuitive user interface. Furthermore, !ParaView is built on an extensible architecture based on open standards.

!ParaView runs on distributed and shared memory parallel as well as single processor systems and has been successfully tested on Windows, Linux, Mac OS X, IBM Blue Gene, Cray XT3 and various Unix workstations and clusters. Under the hood, !ParaView uses the Visualization Toolkit as the data processing and rendering engine and has a user interface written using the Qt cross-platform application framework."
[http://www.paraview.org/Wiki/ParaView link]

 * !ParaView Homepage (http://www.paraview.org)
 * !ParaView Manuals (http://www.paraview.org/documentation)
 * !ParaView Prebuild Executables (http://www.paraview.org/download)
 * !ParaView Wiki (http://www.paraview.org/Wiki/ParaView)

 * more !ParaView comments for JSC (http://www.fz-juelich.de/ias/jsc/EN/Expertise/Support/Software/SoftwareVisu/Paraview.htm)

You can use !ParaView via VNC:
 * [wiki:vnc3d How to access the graphical login nodes of JURECA.]

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=== Build !ParaView
Please check the prebuild !ParaView before you build your own !ParaView.  \\
If anything is missing in the prebuild !ParaView let us know.\\
You can find !ParaView
  * on JURECA as a module ({{{module spider ParaView}}})
  * on !ParaView webpage [http://www.paraview.org/download/ download].

If you want to build it yourself, check the [wiki:ParaView/build_x86 details of the JURECA build].


=== Run !ParaView 
Please use !ParaView via VNC if possible [wiki:vnc3d (more details)].\\
More details on possible !ParaView scenarios can be found [wiki:ParaView/Jureca here].


=== Parallel !ParaView
* [http://www.paraview.org/Wiki/ParaView/ParaView_Readers_and_Parallel_Data_Distribution ParaView Readers]

==== Parallel Data Management
Data must be distributed across parallel processes to take advantage of resources
 
 * Some !ParaView readers import in parallel
   * Explicit parallel formats use separate files for partitions (.pvti, global.silo)
   * Implicit parallel formats – parallel processes figure out what they need – (.vti, brick-f-values)
 * Some !ParaView readers may seem to import in parallel
   * Actually, import serially and then distribute
   * Bad bad bad – 1 process needs enough memory for entire dataset plus additional space for partitioning
 * Some !ParaView readers do NOT read in parallel
   * ... and leave it to you (D3 filter in Paraview)
   * See Bad bad bad above

==== Test Parallel Data Mangement
 * Click Sources->Sphere
 * Max out Theta Resolution and Phi Resolution
 * Click Filters->Alphabetical->Process Id Scalars
 * => Segments are colored by which process handles them

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=== In-Situ Visulalization with !ParaView Catalyst
[[Image(http://www.paraview.org/Wiki/images/0/0f/CatalystFullWorkFlow.png, 200px, align=right, margin=10)]]
[[Image(http://www.kitware.com/source/files/4_1375173693.jpg, 200px, align=right, margin=10)]]
!ParaView provides a library for in-situ visualization and analysis that is called Catalyst. \\
"Catalyst is a light-weight version of the !ParaView server library that is designed to be directly embedded into parallel simulation codes to perform in situ analysis at run time." [http://www.paraview.org/in-situ link]

Ok, what do you have to do:
 * check this webpage [http://www.paraview.org/in-situ html]
 * instrument your code
 * link your code with Catalyst
 * start simulation
 * connect with GUI to simulation

(more detailed infos will be added - in the mean time check this [http://www.paraview.org/in-situ link])


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=== General Links
!ParaView Homepage: http://www.paraview.org \\
!ParaView Wiki: http://www.paraview.org/Wiki/ParaView \\
!ParaView Gallery: http://www.paraview.org/gallery \\
!ParaView for Scientific Data with Python: http://conference.scipy.org/proceedings/scipy2015/pdfs/cory_quammen.pdf

=== Catalyst Links
Catalyst: http://www.paraview.org/in-situ \\
Catalyst Wiki: http://www.paraview.org/Wiki/ParaView/Catalyst/Overview \\

=== Immersive ParaView
Overview: http://www.paraview.org/immersive/ \\
!ParaView Wiki: http://www.paraview.org/Wiki/Immersive_ParaView \\
Immersive !ParaView at JSC: [wiki:ParaView/immersive_paraview Immersive ParaView on PiCasso Projection System (zam069)]

=== Misc Links
General Cluster:  [wiki:ParaView/run_parallel run ParaView on a general cluster] \\
JUVIS: [http://www.fz-juelich.de/ias/jsc/EN/Expertise/Support/Visualization/ScientificVisualization/JUVIS/SampleSessionRemoteRender.html A sample ParaView session with remote rendering] \\
JUVIS: [http://www.fz-juelich.de/ias/jsc/EN/Expertise/Support/Visualization/ScientificVisualization/JUVIS/SampleSessionLocalRender.html A sample ParaView session with local rendering]

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any feedback welcomed - h.zilken@fz.juelich.de, goebbert@jara.rwth-aachen.de