# Development

**URL:** https://discourse.paraview.org/c/development/6.md?no_subcategories=false&page=14

[Latest](https://discourse.paraview.org/latest.md) · [Categories](https://discourse.paraview.org/categories.md) · [Tags](https://discourse.paraview.org/tags.md)

**Page:** 15

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## [Acoustic visualization and post-process : request for feedback and use cases](https://discourse.paraview.org/t/acoustic-visualization-and-post-process-request-for-feedback-and-use-cases/9681)

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**Author:** [@timothee.chabat](https://discourse.paraview.org/u/timothee.chabat)\
**Replies:** 11\
**Last updated:** [February 27, 2023, 9:11am UTC](https://discourse.paraview.org/t/acoustic-visualization-and-post-process-request-for-feedback-and-use-cases/9681 "2023-02-27T09:11:50Z")

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Hello everyone, we (at Kitware Europe) are currently developing a ParaView plugin designed for acoustic visualization and post-processing, and we’re trying to gather feedbacks and feature requests around this field so t…

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## [Reading old state file with newer version of ParaView](https://discourse.paraview.org/t/reading-old-state-file-with-newer-version-of-paraview/11451)

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**Author:** [@cobo](https://discourse.paraview.org/u/cobo)\
**Replies:** 7\
**Last updated:** [February 22, 2023, 1:38pm UTC](https://discourse.paraview.org/t/reading-old-state-file-with-newer-version-of-paraview/11451 "2023-02-22T13:38:38Z")

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Problem: A state file that was generated with a custom application based on ParaView 5.8 crashes the program if I want to load it with an updated custom application based on PV 5.10. I found out that there is one Proper…

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## [where is vtkMultiBlockPLOT3DReader.cxx](https://discourse.paraview.org/t/where-is-vtkmultiblockplot3dreader-cxx/11444)

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**Author:** [@uporersith](https://discourse.paraview.org/u/uporersith)\
**Replies:** 5\
**Last updated:** [February 20, 2023, 3:03pm UTC](https://discourse.paraview.org/t/where-is-vtkmultiblockplot3dreader-cxx/11444 "2023-02-20T15:03:14Z")

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I want to write my own reader plugin and model it off the PLOT3DReader plugin. Where can I find the file “vtkMultiBLockPLOT3DReader.cxx” file? I know it exists because Paraview will tell me there is an error there (see b…

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## [All disabled lights shown after opening .pvsm file](https://discourse.paraview.org/t/all-disabled-lights-shown-after-opening-pvsm-file/11421)

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**Author:** [@fvg](https://discourse.paraview.org/u/fvg)\
**Replies:** 1\
**Last updated:** [February 16, 2023, 9:58am UTC](https://discourse.paraview.org/t/all-disabled-lights-shown-after-opening-pvsm-file/11421 "2023-02-16T09:58:16Z")

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If I save a pvsm file for later use, which has some disabled manual lights, they are always shown in view after opening the file. Only method of removing them from view is enable and disable again. I expect these to no…

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## [Representations in ParaView](https://discourse.paraview.org/t/representations-in-paraview/11381)

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**Author:** [@dcthomp](https://discourse.paraview.org/u/dcthomp)\
**Replies:** 3\
**Last updated:** [February 16, 2023, 7:18am UTC](https://discourse.paraview.org/t/representations-in-paraview/11381 "2023-02-16T07:18:16Z")

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I’m developing a new representation and needed to understand how the various classes interact (as of ParaView 5.11). I used the attached python script to generate a graph illustrating how they are used. It helped me; hop…

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## [RepresentationType in version 5.10](https://discourse.paraview.org/t/representationtype-in-version-5-10/11398)

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**Author:** [@cobo](https://discourse.paraview.org/u/cobo)\
**Replies:** 3\
**Last updated:** [February 14, 2023, 9:21am UTC](https://discourse.paraview.org/t/representationtype-in-version-5-10/11398 "2023-02-14T09:21:27Z")

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My current ParaView based software is only now being migrated from version 5.9 to 5.10. That software includes a custom view that is derived from the SpreadSheet view, and some of the custom filters have it as their stan…

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## [minimize latency](https://discourse.paraview.org/t/minimize-latency/11323)

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**Author:** [@fvitello](https://discourse.paraview.org/u/fvitello)\
**Replies:** 7\
**Last updated:** [February 8, 2023, 10:07am UTC](https://discourse.paraview.org/t/minimize-latency/11323 "2023-02-08T10:07:48Z")

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Dear All, is there any settings (e.g. compression, LOD or others ) that can be implemented in a C++ Custom application in order to minimize latency during remote rendering? Thanks

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## [Bug in Cool to Warm extended colormap](https://discourse.paraview.org/t/bug-in-cool-to-warm-extended-colormap/11322)

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**Author:** [@fvg](https://discourse.paraview.org/u/fvg)\
**Replies:** 4\
**Last updated:** [February 6, 2023, 11:51pm UTC](https://discourse.paraview.org/t/bug-in-cool-to-warm-extended-colormap/11322 "2023-02-06T23:51:02Z")

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The colormap seems to have a duplicate value halfway, see image at 0.5. (this is default 5.11) This leads to a hickup near 0, which is not expected for a linear colormap. cool warm extended.pvsm (209.2 KB)

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## [Handing of coloring and cliping for cells is incorrect](https://discourse.paraview.org/t/handing-of-coloring-and-cliping-for-cells-is-incorrect/11130)

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**Author:** [@wascott](https://discourse.paraview.org/u/wascott)\
**Replies:** 17\
**Last updated:** [February 6, 2023, 7:51pm UTC](https://discourse.paraview.org/t/handing-of-coloring-and-cliping-for-cells-is-incorrect/11130 "2023-02-06T19:51:16Z")

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I am looking at how ParaView paints and clips cells. Lets start with paint. If we paint by cell data, we are flat shading. I’m not sure if flat or smooth shading is the correct thing to do. I am sure that flat shadin…

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## [Streamlines or velocity field in particle simulation](https://discourse.paraview.org/t/streamlines-or-velocity-field-in-particle-simulation/7435)

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**Author:** [@Carlos](https://discourse.paraview.org/u/Carlos)\
**Replies:** 13\
**Last updated:** [February 2, 2023, 2:10pm UTC](https://discourse.paraview.org/t/streamlines-or-velocity-field-in-particle-simulation/7435 "2023-02-02T14:10:16Z")

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Dear users, I’m trying to plot streamlines (or vector velocity fields) to detect vortices formation using results for particle simulation (from DualSPHysics software). I’m not having success using “stream tracer” in par…

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## [Treshold terminology](https://discourse.paraview.org/t/treshold-terminology/11307)

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**Author:** [@Ondrej\_Kincl](https://discourse.paraview.org/u/Ondrej_Kincl)\
**Replies:** 5\
**Last updated:** [February 1, 2023, 3:51pm UTC](https://discourse.paraview.org/t/treshold-terminology/11307 "2023-02-01T15:51:57Z")

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When I use the Threshold filter on a dataset in Paraview 5.10 or 5.11, I have the option to change the threshold method from “Between” (which is default) to “Above upper threshold” or “Below lower threshold”. I find this…

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## [server manager fetch is too late! help me](https://discourse.paraview.org/t/server-manager-fetch-is-too-late-help-me/11282)

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**Author:** [@James1](https://discourse.paraview.org/u/James1)\
**Replies:** 7\
**Last updated:** [January 30, 2023, 5:36pm UTC](https://discourse.paraview.org/t/server-manager-fetch-is-too-late-help-me/11282 "2023-01-30T17:36:06Z")

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When calling server manager fetch, the first time connecting is too slow. After it connects, it gets up to speed, but at first it’s too slow. Is the server manager fetch function a function that manipulates data after c…

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## [Plugin for extremely large number of multiblock zones](https://discourse.paraview.org/t/plugin-for-extremely-large-number-of-multiblock-zones/11289)

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**Author:** [@Gaetan\_Kenway](https://discourse.paraview.org/u/Gaetan_Kenway)\
**Replies:** 5\
**Last updated:** [January 30, 2023, 5:02pm UTC](https://discourse.paraview.org/t/plugin-for-extremely-large-number-of-multiblock-zones/11289 "2023-01-30T17:02:58Z")

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Hi I’m attempting to figure out the best way to get paraview to efficiently visualize my dataset. Briefly, the dataset consists of a refined oct-tree mesh, where each of the resulting cells is further refined into 8^3 …

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## [Scenegraph object visibility issues](https://discourse.paraview.org/t/scenegraph-object-visibility-issues/11271)

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**Author:** [@kvankooten](https://discourse.paraview.org/u/kvankooten)\
**Replies:** 7\
**Last updated:** [January 26, 2023, 4:14pm UTC](https://discourse.paraview.org/t/scenegraph-object-visibility-issues/11271 "2023-01-26T16:14:35Z")

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In my investigations of PV 5.11 I stumbled upon an issue that has been there before, but seems to be getting worse. The shortest description that I can give is that vtkViewNode objects (typically generated by a vtkViewNo…

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## [ParaView 5.11 compilation issue on VS2017](https://discourse.paraview.org/t/paraview-5-11-compilation-issue-on-vs2017/11218)

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**Author:** [@kvankooten](https://discourse.paraview.org/u/kvankooten)\
**Replies:** 4\
**Last updated:** [January 20, 2023, 11:46pm UTC](https://discourse.paraview.org/t/paraview-5-11-compilation-issue-on-vs2017/11218 "2023-01-20T23:46:50Z")

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Hi, I’ve been getting a compilation issue on VS2017 using the tagged 5.11.0 PV release from Gitlab, which was fixed a couple of days ago in the paraview/release branch of VTK: https://gitlab.kitware.com/vtk/vtk/-/commi…

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## [How to use a setting defined in the ApplicationName-UserSettings.json on server side?](https://discourse.paraview.org/t/how-to-use-a-setting-defined-in-the-applicationname-usersettings-json-on-server-side/11185)

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**Author:** [@guillaume\_Peillex](https://discourse.paraview.org/u/guillaume_Peillex)\
**Replies:** 7\
**Last updated:** [January 18, 2023, 10:20am UTC](https://discourse.paraview.org/t/how-to-use-a-setting-defined-in-the-applicationname-usersettings-json-on-server-side/11185 "2023-01-18T10:20:29Z")

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Hi all, I’am using the PipelineSourceName property and want our users be able to specifiy a regex that can be used in the renaming process. I was thinking about setting this regex in the user (or site) settings file bu…

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## [Comparative Visualization: Visibility](https://discourse.paraview.org/t/comparative-visualization-visibility/5561)

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**Author:** [@louisgag](https://discourse.paraview.org/u/louisgag)\
**Replies:** 3\
**Last updated:** [January 17, 2023, 1:33pm UTC](https://discourse.paraview.org/t/comparative-visualization-visibility/5561 "2023-01-17T13:33:13Z")

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Hi, I’m under the impression something in the comparative visualization is not working as intended, but I tested with 5.6.0, 5.8.1, and the latest nightly (5.8.1-1454-gf84473df96), so maybe I’m just not doing it properl…

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## [Mouse Events Callback](https://discourse.paraview.org/t/mouse-events-callback/11183)

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**Author:** [@qasimta](https://discourse.paraview.org/u/qasimta)\
**Replies:** 0\
**Last updated:** [January 17, 2023, 7:19am UTC](https://discourse.paraview.org/t/mouse-events-callback/11183 "2023-01-17T07:19:52Z")

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Hello, Does Paraview RenderView window trigger mouse events such as button clicks and mouse move? If so, can I register a callback to my own python function? and how can this be done? Thanks, Tariq

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## [Camera commands in trace](https://discourse.paraview.org/t/camera-commands-in-trace/11021)

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**Author:** [@wascott](https://discourse.paraview.org/u/wascott)\
**Replies:** 2\
**Last updated:** [January 5, 2023, 1:23am UTC](https://discourse.paraview.org/t/camera-commands-in-trace/11021 "2023-01-05T01:23:45Z")

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I know the trace recorder records the camera with camera position, focal point, view up and scale. Would it be possible, and would it be clearer, if we gave users the current roll/ putch/ yaw/ azimuth/ altitude in a tra…

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## [Review doc updated](https://discourse.paraview.org/t/review-doc-updated/11067)

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**Author:** [@mwestphal](https://discourse.paraview.org/u/mwestphal)\
**Replies:** 0\
**Last updated:** [December 23, 2022, 8:29am UTC](https://discourse.paraview.org/t/review-doc-updated/11067 "2022-12-23T08:29:57Z")

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The review process documentation has been updated to be coherent with what the robot expect. https://gitlab.kitware.com/paraview/paraview/-/blob/master/Documentation/dev/git/develop.md#human-reviews The main take away …

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## [Negative cell volume](https://discourse.paraview.org/t/negative-cell-volume/10995)

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**Author:** [@hkjeldsberg](https://discourse.paraview.org/u/hkjeldsberg)\
**Replies:** 2\
**Last updated:** [December 15, 2022, 7:46pm UTC](https://discourse.paraview.org/t/negative-cell-volume/10995 "2022-12-15T19:46:44Z")

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I have created an unstructured grid consisting of one tetrahedral cell. \<?xml version="1.0"?\> \<!DOCTYPE Xdmf SYSTEM "Xdmf.dtd" \[\]\> \<Xdmf Version="3.0" xmlns:xi="http://www.w3.org/2001/XInclude"\> \<Domain\> \<Grid Nam…

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## [Custom plugin - Requirements for plugin compatible with release \[Windows\]](https://discourse.paraview.org/t/custom-plugin-requirements-for-plugin-compatible-with-release-windows/10972)

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**Author:** [@MCO](https://discourse.paraview.org/u/MCO)\
**Replies:** 3\
**Last updated:** [December 14, 2022, 3:57pm UTC](https://discourse.paraview.org/t/custom-plugin-requirements-for-plugin-compatible-with-release-windows/10972 "2022-12-14T15:57:10Z")

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Hi everyone, We plan to developp a plugin, that users may use with the latest release. On Windows, the latest release of paraview (5.11.0) is build with msvc2017, whereas the documentation suggests to setup the dev en…

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## [Idea for plugin - difference of results between non-identical meshes](https://discourse.paraview.org/t/idea-for-plugin-difference-of-results-between-non-identical-meshes/10756)

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**Author:** [@k\_herdzik77](https://discourse.paraview.org/u/k_herdzik77)\
**Replies:** 3\
**Last updated:** [December 13, 2022, 4:23pm UTC](https://discourse.paraview.org/t/idea-for-plugin-difference-of-results-between-non-identical-meshes/10756 "2022-12-13T16:23:14Z")

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Hi everyone, my teammate & I have an idea for FE postprocessing plugin for Paraview, and we’d like to hear from you if this is at all feasible. A little background first: the problem concerns comparing results obtained…

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## [Paraview performance while navigating through NetCDF time steps](https://discourse.paraview.org/t/paraview-performance-while-navigating-through-netcdf-time-steps/10924)

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**Author:** [@Sherin\_Sugathan](https://discourse.paraview.org/u/Sherin_Sugathan)\
**Replies:** 0\
**Last updated:** [December 6, 2022, 11:14am UTC](https://discourse.paraview.org/t/paraview-performance-while-navigating-through-netcdf-time-steps/10924 "2022-12-06T11:14:47Z")

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I have a NetCDF file with multiple time points in it and I program in vtk python. After loading the NetCDF file in paraview, I am able to navigate through all the available time points without any delay. However, I am no…

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## [Question about source plugin destructor call](https://discourse.paraview.org/t/question-about-source-plugin-destructor-call/10837)

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**Author:** [@guillaume\_Peillex](https://discourse.paraview.org/u/guillaume_Peillex)\
**Replies:** 2\
**Last updated:** [November 25, 2022, 12:06pm UTC](https://discourse.paraview.org/t/question-about-source-plugin-destructor-call/10837 "2022-11-25T12:06:13Z")

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Hi all, I’am currently trying to understand why, when i delete a source (built from one of our plugin) with a right click on it in the pipeline browser, its destructor is not called. In fact i see it get called only whe…

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## [I found a conflict between the system versions of liblzma and the internal version built by python for ParaView 5.11.0-RC1](https://discourse.paraview.org/t/i-found-a-conflict-between-the-system-versions-of-liblzma-and-the-internal-version-built-by-python-for-paraview-5-11-0-rc1/10449)

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**Author:** [@joeh](https://discourse.paraview.org/u/joeh)\
**Replies:** 10\
**Last updated:** [November 22, 2022, 1:40pm UTC](https://discourse.paraview.org/t/i-found-a-conflict-between-the-system-versions-of-liblzma-and-the-internal-version-built-by-python-for-paraview-5-11-0-rc1/10449 "2022-11-22T13:40:37Z")

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Hello, When building the internal Python version of ParaView 5.11.0-RC1 an internal version of liblzma.so is built. When building boost for use with OpenVDB (-DENABLE\_openvdb=ON), boost uses the system library instead o…

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## [problem with running pravaiew commend in ubuntu](https://discourse.paraview.org/t/problem-with-running-pravaiew-commend-in-ubuntu/10800)

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**Author:** [@shir\_levi](https://discourse.paraview.org/u/shir_levi)\
**Replies:** 1\
**Last updated:** [November 18, 2022, 3:29am UTC](https://discourse.paraview.org/t/problem-with-running-pravaiew-commend-in-ubuntu/10800 "2022-11-18T03:29:28Z")

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i get this nassege when i try to run paraview commend qt.qpa.xcb: could not connect to display 172.30.32.1:0 qt.qpa.plugin: Could not load the Qt platform plugin “xcb” in “” even though it was found. This application …

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## [What is needed to make plugin settings persistent?](https://discourse.paraview.org/t/what-is-needed-to-make-plugin-settings-persistent/10759)

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**Author:** [@johnt](https://discourse.paraview.org/u/johnt)\
**Replies:** 1\
**Last updated:** [November 16, 2022, 8:44am UTC](https://discourse.paraview.org/t/what-is-needed-to-make-plugin-settings-persistent/10759 "2022-11-16T08:44:12Z")

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I have a small plugin that needs one persistent setting (string). I can add an xml config file to my build (via SERVER\_MANAGER\_XML) and the new setting appears in the pqSettingsDialog, and I can get/set its value via vt…

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## [Nightly names with current release version are confusing](https://discourse.paraview.org/t/nightly-names-with-current-release-version-are-confusing/8742)

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**Author:** [@cory.quammen](https://discourse.paraview.org/u/cory.quammen)\
**Replies:** 33\
**Last updated:** [November 11, 2022, 8:16pm UTC](https://discourse.paraview.org/t/nightly-names-with-current-release-version-are-confusing/8742 "2022-11-11T20:16:25Z")

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Why do we include the number of the currently released version in nightly builds of ParaView? Why not just “nightly” instead of “5.10.0-RC2”, for example? The problem with including the version number is that it suggest…

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## [File Dialog Favorite based on path from environment var](https://discourse.paraview.org/t/file-dialog-favorite-based-on-path-from-environment-var/10623)

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**Author:** [@aron.helser](https://discourse.paraview.org/u/aron.helser)\
**Replies:** 16\
**Last updated:** [November 10, 2022, 6:22pm UTC](https://discourse.paraview.org/t/file-dialog-favorite-based-on-path-from-environment-var/10623 "2022-11-10T18:22:55Z")

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We are working on an extension to the Favorites list in the file dialog, based on this issue. Basically the proposal is to add an entry to Favorites which doesn’t point to a specific folder, but looks up a path from an e…

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