# Development

**URL:** https://discourse.paraview.org/c/development/6.md?no_subcategories=false&page=4

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

**Page:** 5

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## [How to manage custom filter via python?](https://discourse.paraview.org/t/how-to-manage-custom-filter-via-python/16085)

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**Author:** [@joint](https://discourse.paraview.org/u/joint)\
**Replies:** 1\
**Last updated:** [February 4, 2025, 8:53am UTC](https://discourse.paraview.org/t/how-to-manage-custom-filter-via-python/16085 "2025-02-04T08:53:44Z")

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Hello dear paraview developers! I want to have some complex logic and integration with other systems, with my python scripts How can I manage my C++/VTK plugin from Python? Thanks

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## [Information\_only properties don't work for custom representation](https://discourse.paraview.org/t/information-only-properties-dont-work-for-custom-representation/16097)

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**Author:** [@jeDuck](https://discourse.paraview.org/u/jeDuck)\
**Replies:** 1\
**Last updated:** [February 3, 2025, 3:46pm UTC](https://discourse.paraview.org/t/information-only-properties-dont-work-for-custom-representation/16097 "2025-02-03T15:46:29Z")

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Dear Paraview developers, I have a custom representation, which is a subclass of vtkXYChartRepresentation. It has a property and I want to manipulate its visibility depending on the input. I have created an information…

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## [Where are all xml proxies defined?](https://discourse.paraview.org/t/where-are-all-xml-proxies-defined/16084)

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**Author:** [@joint](https://discourse.paraview.org/u/joint)\
**Replies:** 1\
**Last updated:** [January 30, 2025, 4:06pm UTC](https://discourse.paraview.org/t/where-are-all-xml-proxies-defined/16084 "2025-01-30T16:06:44Z")

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Hello! For example I have such a property \<IntVectorProperty label= name= \</IntVectorProperty\> Where can I get the information on which kind of widget will be generated for that? Like, where are all these x…

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## [Labels in RenderView](https://discourse.paraview.org/t/labels-in-renderview/16036)

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**Author:** [@joint](https://discourse.paraview.org/u/joint)\
**Replies:** 5\
**Last updated:** [January 30, 2025, 8:12am UTC](https://discourse.paraview.org/t/labels-in-renderview/16036 "2025-01-30T08:12:32Z")

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Hello dear ParaView developers! I want to add some labels to some structrural components of the model, for them to be present in the render view. I dont know how coordinate axes are implemented and whether they are the…

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## [PVPython: how to get strings from filter in python?](https://discourse.paraview.org/t/pvpython-how-to-get-strings-from-filter-in-python/16081)

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**Author:** [@joint](https://discourse.paraview.org/u/joint)\
**Replies:** 0\
**Last updated:** [January 30, 2025, 8:09am UTC](https://discourse.paraview.org/t/pvpython-how-to-get-strings-from-filter-in-python/16081 "2025-01-30T08:09:47Z")

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Hello dear ParaView developers! I want to have a python function which returns the list of strings representing the internal parameters of my custom filter I know how to get individual numbers - for those IntVectorPro…

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## [Angular periodic filter bug for Surface visualization on OSX (Apple silicon M3) with v5.10 and above](https://discourse.paraview.org/t/angular-periodic-filter-bug-for-surface-visualization-on-osx-apple-silicon-m3-with-v5-10-and-above/15762)

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**Author:** [@Pierluigi\_Morra](https://discourse.paraview.org/u/Pierluigi_Morra)\
**Replies:** 7\
**Last updated:** [January 27, 2025, 4:23pm UTC](https://discourse.paraview.org/t/angular-periodic-filter-bug-for-surface-visualization-on-osx-apple-silicon-m3-with-v5-10-and-above/15762 "2025-01-27T16:23:19Z")

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Hello everyone, I have downloaded Paraview from this link (https://www.paraview.org/download/) and tried to use the angular filter. I use a MacBook with M3 (Apple Silicon) and macOS Sonoma 14.5. My data comes from a si…

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## [Linking with Boost libraries fails](https://discourse.paraview.org/t/linking-with-boost-libraries-fails/15952)

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**Author:** [@cobo](https://discourse.paraview.org/u/cobo)\
**Replies:** 2\
**Last updated:** [January 6, 2025, 4:10pm UTC](https://discourse.paraview.org/t/linking-with-boost-libraries-fails/15952 "2025-01-06T16:10:46Z")

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Right now I am trying to recompile ParaView 5.13 with the LAS reader option turned on, on Windows 11. I have downloaded a Boost library version 1.74 for vc142 and with mt, and I have compiled sources of liblas with the s…

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## [pqParaViewBehaviors affects layout effects](https://discourse.paraview.org/t/pqparaviewbehaviors-affects-layout-effects/15881)

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**Author:** [@flipper](https://discourse.paraview.org/u/flipper)\
**Replies:** 5\
**Last updated:** [December 31, 2024, 2:41am UTC](https://discourse.paraview.org/t/pqparaviewbehaviors-affects-layout-effects/15881 "2024-12-31T02:41:34Z")

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Hi, I’m having a problem with layouts! After calling ParaView’s pqParaViewBehaviors in my Qt application, the effect of my previous layout is completely affected. After several attempts, I realized that when adding the c…

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## [Start supporting Qt6?](https://discourse.paraview.org/t/start-supporting-qt6/11239)

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**Author:** [@Neumann-A](https://discourse.paraview.org/u/Neumann-A)\
**Replies:** 11\
**Last updated:** [December 30, 2024, 10:45am UTC](https://discourse.paraview.org/t/start-supporting-qt6/11239 "2024-12-30T10:45:39Z")

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Any plans to support Qt6? For vcpkg I basically updated everything so that it can move other stuff like opencv to qt6. (see \[vtk|opencv4|openimageio\] Switch to Qt6 by Neumann-A · Pull Request #29078 · microsoft/vcpkg · G…

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## [Missing Cell Data](https://discourse.paraview.org/t/missing-cell-data/15889)

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**Author:** [@NorbertHofbauer](https://discourse.paraview.org/u/NorbertHofbauer)\
**Replies:** 2\
**Last updated:** [December 20, 2024, 6:34pm UTC](https://discourse.paraview.org/t/missing-cell-data/15889 "2024-12-20T18:34:20Z")

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Hi everyone, i am currently not sure if its a bug in paraview or i screw up something with the creation of the .vtu I have got a vtu that contains cell data. first\_run.5.000001.vtu (6.0 KB) But they are not showing u…

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## [Issues with line width depending on camera view for Parallel Projection](https://discourse.paraview.org/t/issues-with-line-width-depending-on-camera-view-for-parallel-projection/15852)

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**Author:** [@whereismymoney](https://discourse.paraview.org/u/whereismymoney)\
**Replies:** 7\
**Last updated:** [December 17, 2024, 5:42am UTC](https://discourse.paraview.org/t/issues-with-line-width-depending-on-camera-view-for-parallel-projection/15852 "2024-12-17T05:42:35Z")

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This is for ParaView 5.13.0 on Windows 11, but it also happens with other versions and operating systems. The structure of my question is: The bad news The good news (most importantly) I need to understand the good ne…

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## [Interest in testing ParaView with a custom MPI plugin - support needed](https://discourse.paraview.org/t/interest-in-testing-paraview-with-a-custom-mpi-plugin-support-needed/15842)

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**Author:** [@mEm](https://discourse.paraview.org/u/mEm)\
**Replies:** 3\
**Last updated:** [December 6, 2024, 9:21am UTC](https://discourse.paraview.org/t/interest-in-testing-paraview-with-a-custom-mpi-plugin-support-needed/15842 "2024-12-06T09:21:15Z")

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Hi all, I am working on an MPI based extension library, and I would really love to test it within ParaView, since I think it would be a very interesting real-world application. However, to do so, I’d need (and love) yo…

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## [How to make a pop-up warning / error message?](https://discourse.paraview.org/t/how-to-make-a-pop-up-warning-error-message/15828)

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**Author:** [@joint](https://discourse.paraview.org/u/joint)\
**Replies:** 2\
**Last updated:** [December 3, 2024, 10:32am UTC](https://discourse.paraview.org/t/how-to-make-a-pop-up-warning-error-message/15828 "2024-12-03T10:32:11Z")

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Hello dear ParaView developers! How can one pass errors from the custom client-side widgets to the user? For server-side there are vtk Error macros, however, they dont seem to work in the client side. What are the alter…

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## [Which proxy is a current proxy?](https://discourse.paraview.org/t/which-proxy-is-a-current-proxy/15827)

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**Author:** [@joint](https://discourse.paraview.org/u/joint)\
**Replies:** 4\
**Last updated:** [December 3, 2024, 9:55am UTC](https://discourse.paraview.org/t/which-proxy-is-a-current-proxy/15827 "2024-12-03T09:55:15Z")

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Hello, dear ParaView developers! Explain me please, which proxy is considered a current? Is it always a filter, which was accessed last and is selected in the pq in the left of paraview menu, active element of the pipel…

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## [Where to set "active scalar" in a way that it really shows?](https://discourse.paraview.org/t/where-to-set-active-scalar-in-a-way-that-it-really-shows/15777)

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**Author:** [@cobo](https://discourse.paraview.org/u/cobo)\
**Replies:** 7\
**Last updated:** [December 2, 2024, 9:26am UTC](https://discourse.paraview.org/t/where-to-set-active-scalar-in-a-way-that-it-really-shows/15777 "2024-12-02T09:26:05Z")

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The “active scalar” of some “pipeline item” is in ParaView the attribute that is shown in a render view with coloring - direct or mapped. If now a custom filter generates a new attribute, it would be nice if after press…

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## [MYSTERY: How to get access to the upstream algorithm from the client side?](https://discourse.paraview.org/t/mystery-how-to-get-access-to-the-upstream-algorithm-from-the-client-side/15813)

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**Author:** [@joint](https://discourse.paraview.org/u/joint)\
**Replies:** 1\
**Last updated:** [November 29, 2024, 8:56am UTC](https://discourse.paraview.org/t/mystery-how-to-get-access-to-the-upstream-algorithm-from-the-client-side/15813 "2024-11-29T08:56:05Z")

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Hello dear Paraview developers! I have a question of great importance. How can one get access to the algorithm upstream to the current algorithm from the widget side? I know about filter = vtkSrcPrxyPtr::Take(vtkSMSou…

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## [Reading Fluent HDF5 files in paraview](https://discourse.paraview.org/t/reading-fluent-hdf5-files-in-paraview/11933)

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**Author:** [@EKH](https://discourse.paraview.org/u/EKH)\
**Replies:** 4\
**Last updated:** [April 21, 2023, 7:06am UTC](https://discourse.paraview.org/t/reading-fluent-hdf5-files-in-paraview/11933 "2023-04-21T07:06:55Z")

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Could you please help in debugging the error I received when trying to load h5 files exported from Ansys Fluent? I am using version 5.10.1 of ParaView. I am aware of this thread Reading Data from HDF5 File and this HDF…

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## [Error python-path](https://discourse.paraview.org/t/error-python-path/14419)

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**Author:** [@igel89](https://discourse.paraview.org/u/igel89)\
**Replies:** 3\
**Last updated:** [November 21, 2024, 2:46am UTC](https://discourse.paraview.org/t/error-python-path/14419 "2024-11-21T02:46:56Z")

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Dear ParaView Team, I use Paraview to visualize gprMax data (ground penetrating radar). I get the following error message with Linux Mint: Traceback (last call): File “”, line 185, in File “/home/jan/Downloads/digit…

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## [File Series Support for Custom Time-Unaware Plugin](https://discourse.paraview.org/t/file-series-support-for-custom-time-unaware-plugin/15566)

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**Author:** [@Keith\_Ballard\_CIV](https://discourse.paraview.org/u/Keith_Ballard_CIV)\
**Replies:** 3\
**Last updated:** [November 12, 2024, 9:29am UTC](https://discourse.paraview.org/t/file-series-support-for-custom-time-unaware-plugin/15566 "2024-11-12T09:29:08Z")

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I am working on a custom ParaView plugin for one of our internal simulation tools. To ease development, I made the plugin time-unaware and would like to use the vtkFileSeriesReader with si\_class vtkSIMetaReaderProxy to p…

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## [Strange CMake problem when porting from PV 5.12.0 to PV 5.13.1](https://discourse.paraview.org/t/strange-cmake-problem-when-porting-from-pv-5-12-0-to-pv-5-13-1/15687)

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**Author:** [@cobo](https://discourse.paraview.org/u/cobo)\
**Replies:** 8\
**Last updated:** [November 11, 2024, 1:53pm UTC](https://discourse.paraview.org/t/strange-cmake-problem-when-porting-from-pv-5-12-0-to-pv-5-13-1/15687 "2024-11-11T13:53:49Z")

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After successfully compiling the current PV version 5.13.1, I tried to also build my own custom application with that version, but CMake is not able to successfully prepare the project: It tells me after some working: No…

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## [Release testing](https://discourse.paraview.org/t/release-testing/15569)

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**Author:** [@wascott](https://discourse.paraview.org/u/wascott)\
**Replies:** 14\
**Last updated:** [October 30, 2024, 4:21pm UTC](https://discourse.paraview.org/t/release-testing/15569 "2024-10-30T16:21:14Z")

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We need better testing procedures for releases. This would replace our current ambiguous statement to test some of the features in the classroom tutorials. These tests are designed to catch issues that are not found in…

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## [The missing Apply button press "trap"](https://discourse.paraview.org/t/the-missing-apply-button-press-trap/15650)

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**Author:** [@cobo](https://discourse.paraview.org/u/cobo)\
**Replies:** 2\
**Last updated:** [October 29, 2024, 9:43am UTC](https://discourse.paraview.org/t/the-missing-apply-button-press-trap/15650 "2024-10-29T09:43:19Z")

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As an experienced user of ParaView, I press Apply in order to load a data file after choosing the proper reader - automatically. However, I had once more a support case with a less experienced customer - like I had it al…

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## [Paraview instantly crashing when trying to do anything with \*.sgy files](https://discourse.paraview.org/t/paraview-instantly-crashing-when-trying-to-do-anything-with-sgy-files/15637)

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**Author:** [@Rbbric](https://discourse.paraview.org/u/Rbbric)\
**Replies:** 3\
**Last updated:** [October 28, 2024, 6:13am UTC](https://discourse.paraview.org/t/paraview-instantly-crashing-when-trying-to-do-anything-with-sgy-files/15637 "2024-10-28T06:13:36Z")

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Hi there, I am completely new to Paraview, and am hoping to use it for my Masters work. I am trying to work with \*.sgy files. Whether it’s attempting to visualise it in the 3D space, or updating the properties, my compu…

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## [ParaView 5.10.0 Icon: Hard to see for us older folks](https://discourse.paraview.org/t/paraview-5-10-0-icon-hard-to-see-for-us-older-folks/8733)

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**Author:** [@Michael\_Jackson](https://discourse.paraview.org/u/Michael_Jackson)\
**Replies:** 8\
**Last updated:** [October 27, 2024, 3:14pm UTC](https://discourse.paraview.org/t/paraview-5-10-0-icon-hard-to-see-for-us-older-folks/8733 "2024-10-27T15:14:22Z")

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Why is it that application developers insist on making their application’s icon smaller, less information dense and similar to other applications. I thought the whole point of having an icon was to differentiate it from…

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## [Change default orientation widget](https://discourse.paraview.org/t/change-default-orientation-widget/15553)

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**Author:** [@spyridon97](https://discourse.paraview.org/u/spyridon97)\
**Replies:** 26\
**Last updated:** [October 27, 2024, 2:50pm UTC](https://discourse.paraview.org/t/change-default-orientation-widget/15553 "2024-10-27T14:50:28Z")

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In the next release of ParaView, we are trying to give a new look and feel to our favorite platform. Part of these changes have been changing the default color map and background (read more here Replacement default colo…

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## [VTM writer used with Catalyst and large number of processes fails due to excessive memory usage](https://discourse.paraview.org/t/vtm-writer-used-with-catalyst-and-large-number-of-processes-fails-due-to-excessive-memory-usage/15629)

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**Author:** [@cmorsbach](https://discourse.paraview.org/u/cmorsbach)\
**Replies:** 0\
**Last updated:** [October 24, 2024, 1:57pm UTC](https://discourse.paraview.org/t/vtm-writer-used-with-catalyst-and-large-number-of-processes-fails-due-to-excessive-memory-usage/15629 "2024-10-24T13:57:08Z")

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Hi all, I’ve been running some strong scaling tests with our CFD code, which has in-situ functionality using ParaView Catalyst V1. The data, we pass to the co-processor is a vtkMultiBlockDataset where only one vtkUnstru…

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## [Number of files in time series](https://discourse.paraview.org/t/number-of-files-in-time-series/15599)

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**Author:** [@ThomasAC](https://discourse.paraview.org/u/ThomasAC)\
**Replies:** 4\
**Last updated:** [October 22, 2024, 11:52am UTC](https://discourse.paraview.org/t/number-of-files-in-time-series/15599 "2024-10-22T11:52:21Z")

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Hi, I am writing a reader plugin and would like to make the plugin do something slightly different in case a time series is loaded. How do I get the number of files in a time series or how what is the simplest way to i…

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## [How to use the SSIM image comparison mechanism when testing ParaView plugins and ParaView based applications](https://discourse.paraview.org/t/how-to-use-the-ssim-image-comparison-mechanism-when-testing-paraview-plugins-and-paraview-based-applications/15538)

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**Author:** [@mwestphal](https://discourse.paraview.org/u/mwestphal)\
**Replies:** 2\
**Last updated:** [October 22, 2024, 8:28am UTC](https://discourse.paraview.org/t/how-to-use-the-ssim-image-comparison-mechanism-when-testing-paraview-plugins-and-paraview-based-applications/15538 "2024-10-22T08:28:51Z")

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Last year, VTK added a new image comparison mechanism: Enhancing VTK's Image Testing Framework: A Transition to SSIM and Lab Channels - Development - VTK This mechanism was recently integrated in ParaView and can be use…

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## [Find Data improvement](https://discourse.paraview.org/t/find-data-improvement/15583)

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**Author:** [@Andy\_Bauer](https://discourse.paraview.org/u/Andy_Bauer)\
**Replies:** 2\
**Last updated:** [October 21, 2024, 11:55am UTC](https://discourse.paraview.org/t/find-data-improvement/15583 "2024-10-21T11:55:08Z")

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What do people think about adding in an option to pick every nth point or cell with Find Data? We have this option with the Glyph filter to reduce the number of items that are used for glyphing. Having a similar ability …

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## [openfoam + xdmf + vtkhdf parallel file loading development](https://discourse.paraview.org/t/openfoam-xdmf-vtkhdf-parallel-file-loading-development/15591)

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**Author:** [@osarusan](https://discourse.paraview.org/u/osarusan)\
**Replies:** 2\
**Last updated:** [October 21, 2024, 6:45am UTC](https://discourse.paraview.org/t/openfoam-xdmf-vtkhdf-parallel-file-loading-development/15591 "2024-10-21T06:45:48Z")

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Hi There, I’m looking to resolve performance issues inside openfoam, XDMF3 + VTKHDF5. Been very exciting to see and track VTKHDF5 but I don’t think I’ve seen my observation of XDMF3 issues fixed in vtkhdf5, openfoam ca…

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