# Development

**URL:** https://discourse.paraview.org/c/development/6.md?no_subcategories=false&page=8

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**Page:** 9

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## [What is SourceProxy?](https://discourse.paraview.org/t/what-is-sourceproxy/14312)

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**Author:** [@joint](https://discourse.paraview.org/u/joint)\
**Replies:** 3\
**Last updated:** [April 2, 2024, 8:22am UTC](https://discourse.paraview.org/t/what-is-sourceproxy/14312 "2024-04-02T08:22:01Z")

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Hello! Could you please clarify what ‘SourceProxy’ in plugin xml means? And what is it needed for? Best regards

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## [How to append component of one volume to another in custom application](https://discourse.paraview.org/t/how-to-append-component-of-one-volume-to-another-in-custom-application/14296)

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**Author:** [@MulberryClassic](https://discourse.paraview.org/u/MulberryClassic)\
**Replies:** 3\
**Last updated:** [April 2, 2024, 8:15am UTC](https://discourse.paraview.org/t/how-to-append-component-of-one-volume-to-another-in-custom-application/14296 "2024-04-02T08:15:42Z")

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Hi Experts, I have 2 datasets. One with 3 components (RGB) and the other as 1 component (A). I want to combine these two to form a single dataset of 4 components (RGBA). I implemented this using a programmable filter in…

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## [What is ProxyGroup and what is it needed for?](https://discourse.paraview.org/t/what-is-proxygroup-and-what-is-it-needed-for/14311)

<div class="topic-metadata">

**Author:** [@joint](https://discourse.paraview.org/u/joint)\
**Replies:** 0\
**Last updated:** [April 2, 2024, 8:13am UTC](https://discourse.paraview.org/t/what-is-proxygroup-and-what-is-it-needed-for/14311 "2024-04-02T08:13:14Z")

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Hello! What does ‘ProxyGroup’ in plugin xml means? What values could this parameter have? Thanks!

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## [Plugin: Why do I change .xml file, but the default values are still the same?](https://discourse.paraview.org/t/plugin-why-do-i-change-xml-file-but-the-default-values-are-still-the-same/14187)

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**Author:** [@joint](https://discourse.paraview.org/u/joint)\
**Replies:** 1\
**Last updated:** [April 1, 2024, 11:43pm UTC](https://discourse.paraview.org/t/plugin-why-do-i-change-xml-file-but-the-default-values-are-still-the-same/14187 "2024-04-01T23:43:25Z")

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Hello dear Paraview developers! Could one help me please, I am modifying the XML file of the plugin, but default values dont change. I tried launching cmake without entire solution rebuild, but it has not worked. I have…

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## [Plugin development: Cannot open include file	vtkSMRepresentationProxy.h](https://discourse.paraview.org/t/plugin-development-cannot-open-include-file-vtksmrepresentationproxy-h/14153)

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**Author:** [@joint](https://discourse.paraview.org/u/joint)\
**Replies:** 7\
**Last updated:** [April 1, 2024, 8:56pm UTC](https://discourse.paraview.org/t/plugin-development-cannot-open-include-file-vtksmrepresentationproxy-h/14153 "2024-04-01T20:56:15Z")

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Hello dear Paraview developers! I came across such an issue, however, in the paraview.plugin of a correspondent plugin: REQUIRES\_MODULES ParaView::pqComponents ParaView::pqApplicationComponents ParaView::Remoting…

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## [paraview.plugin? How to include all necessary directories in Paraview?](https://discourse.paraview.org/t/paraview-plugin-how-to-include-all-necessary-directories-in-paraview/14154)

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**Author:** [@joint](https://discourse.paraview.org/u/joint)\
**Replies:** 2\
**Last updated:** [April 1, 2024, 8:55pm UTC](https://discourse.paraview.org/t/paraview-plugin-how-to-include-all-necessary-directories-in-paraview/14154 "2024-04-01T20:55:16Z")

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Hello everybody! I am trying to develop a paraview plugin, however, it does not compile For example, it says, Cannot open include file: 'vtkChartsCoreModule.h': No such file or directory But I have written into the p…

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## [Failed to find the required module VTK::ImagingMorphological](https://discourse.paraview.org/t/failed-to-find-the-required-module-vtk-imagingmorphological/14152)

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**Author:** [@Thomas\_Theussl](https://discourse.paraview.org/u/Thomas_Theussl)\
**Replies:** 4\
**Last updated:** [April 1, 2024, 8:54pm UTC](https://discourse.paraview.org/t/failed-to-find-the-required-module-vtk-imagingmorphological/14152 "2024-04-01T20:54:28Z")

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I am trying to use vtkImageOpenClose3D in a ParaView plugin, I have added VTK::ImagingMorphological in vtk.module under DEPENDS, but I get the cmake error \[cmake\] Failed to find the required module VTK::ImagingMorphol…

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## [VTK module import failure](https://discourse.paraview.org/t/vtk-module-import-failure/14079)

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**Author:** [@joint](https://discourse.paraview.org/u/joint)\
**Replies:** 1\
**Last updated:** [April 1, 2024, 8:46pm UTC](https://discourse.paraview.org/t/vtk-module-import-failure/14079 "2024-04-01T20:46:30Z")

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Hello friends! I was trying to figure out what ’ s wrong for a few hours CMake Error at CMake/ParaViewPlugin.cmake:1012 (message): Failed to find the required module VTK::PythonInterpreter. C:\\FidesysViewer\\CMake/Par…

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## [CMake plugin building failure: Failed to find the required module](https://discourse.paraview.org/t/cmake-plugin-building-failure-failed-to-find-the-required-module/14076)

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**Author:** [@joint](https://discourse.paraview.org/u/joint)\
**Replies:** 1\
**Last updated:** [April 1, 2024, 8:45pm UTC](https://discourse.paraview.org/t/cmake-plugin-building-failure-failed-to-find-the-required-module/14076 "2024-04-01T20:45:57Z")

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Hello dear Paraview developers! I have written in .plugin file: REQUIRES\_MODULES VTK::PythonInterpreter As well as in vtk.module files But I have an error Failed to find the required module VTK::PythonInterpreter…

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## [How to get vtkAlgorithmOutput from vtkSMSourceProxy?](https://discourse.paraview.org/t/how-to-get-vtkalgorithmoutput-from-vtksmsourceproxy/14293)

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**Author:** [@joint](https://discourse.paraview.org/u/joint)\
**Replies:** 1\
**Last updated:** [March 29, 2024, 12:21pm UTC](https://discourse.paraview.org/t/how-to-get-vtkalgorithmoutput-from-vtksmsourceproxy/14293 "2024-03-29T12:21:01Z")

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Hello dear paraview developers! Could you explain me please, how to get vtkAlgorithmOutput from vtkSMSourceProxy? I want to create the filter in the runtime and to set its input connection, but I dont see a way to do i…

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## [Retrieve and Change Point Data in Custom Application](https://discourse.paraview.org/t/retrieve-and-change-point-data-in-custom-application/14282)

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**Author:** [@MulberryClassic](https://discourse.paraview.org/u/MulberryClassic)\
**Replies:** 0\
**Last updated:** [March 28, 2024, 7:05am UTC](https://discourse.paraview.org/t/retrieve-and-change-point-data-in-custom-application/14282 "2024-03-28T07:05:06Z")

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Hi Experts, I have loaded 2 datasets. One with 3 components (RGB) and the other as 1 component (A). I want to combine these two to form a single dataset of 4 components (RGBA). I implemented this using a programmable fi…

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## [Applying a Paraview Filter Directly from Script in Custom Application](https://discourse.paraview.org/t/applying-a-paraview-filter-directly-from-script-in-custom-application/14278)

<div class="topic-metadata">

**Author:** [@MulberryClassic](https://discourse.paraview.org/u/MulberryClassic)\
**Replies:** 8\
**Last updated:** [March 27, 2024, 3:41pm UTC](https://discourse.paraview.org/t/applying-a-paraview-filter-directly-from-script-in-custom-application/14278 "2024-03-27T15:41:05Z")

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Hello Experts, I want to apply the Extract Subset filter to a loaded volume data directly from the custom application script. The examples I have seen use GUI implementations. I want to know how can I just apply the fil…

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## [Could the dataset data itself be received from vtkSMSourceProxy ?](https://discourse.paraview.org/t/could-the-dataset-data-itself-be-received-from-vtksmsourceproxy/14265)

<div class="topic-metadata">

**Author:** [@joint](https://discourse.paraview.org/u/joint)\
**Replies:** 1\
**Last updated:** [March 26, 2024, 12:14pm UTC](https://discourse.paraview.org/t/could-the-dataset-data-itself-be-received-from-vtksmsourceproxy/14265 "2024-03-26T12:14:20Z")

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Hello dear Paraview developers! It is known, that vtkPVDataInformation can be retrieved via vtkSMSourceProxy However it seems to contain only meta information What could one do to retrieve the data itself? Thank you…

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## [New reader for Exodus files (IOSS)](https://discourse.paraview.org/t/new-reader-for-exodus-files-ioss/7097)

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**Author:** [@utkarsh.ayachit](https://discourse.paraview.org/u/utkarsh.ayachit)\
**Replies:** 13\
**Last updated:** [March 26, 2024, 9:42am UTC](https://discourse.paraview.org/t/new-reader-for-exodus-files-ioss/7097 "2024-03-26T09:42:39Z")

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Since ParaView 5.9, a new implementation of a reader for reader Exodus files that uses the IOSS library was available. Soon, with 5.10 on wards, this will be the default reader that will be used by ParaView reading Exodu…

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## [Building a Custom Paraview Application to Only Output to a Single Window](https://discourse.paraview.org/t/building-a-custom-paraview-application-to-only-output-to-a-single-window/14211)

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**Author:** [@MulberryClassic](https://discourse.paraview.org/u/MulberryClassic)\
**Replies:** 7\
**Last updated:** [March 25, 2024, 2:12pm UTC](https://discourse.paraview.org/t/building-a-custom-paraview-application-to-only-output-to-a-single-window/14211 "2024-03-25T14:12:00Z")

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Hi, I have setup a remote bewoulf cluster that I run a pvserver on. Using the paraview gui client, I first connect to the server, load a pvd file, apply some inbuilt and custom filters and then volume render the data. Wh…

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## [Which filters are accessible in vtkSMSessionProxyManager](https://discourse.paraview.org/t/which-filters-are-accessible-in-vtksmsessionproxymanager/14253)

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**Author:** [@joint](https://discourse.paraview.org/u/joint)\
**Replies:** 1\
**Last updated:** [March 25, 2024, 8:19am UTC](https://discourse.paraview.org/t/which-filters-are-accessible-in-vtksmsessionproxymanager/14253 "2024-03-25T08:19:20Z")

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Hello dear Paraview developers! I cant get access to my proxy via this pxm-\>GetProxies(“filters\_prototypes”, “MyFilter”, render\_view\_proxies); Because when filter is created in pqObjectBuilder::createFilter It does n…

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## [How to Volume Render Data in Custom Application Without Widgets?](https://discourse.paraview.org/t/how-to-volume-render-data-in-custom-application-without-widgets/14249)

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**Author:** [@Depoha](https://discourse.paraview.org/u/Depoha)\
**Replies:** 0\
**Last updated:** [March 24, 2024, 1:32pm UTC](https://discourse.paraview.org/t/how-to-volume-render-data-in-custom-application-without-widgets/14249 "2024-03-24T13:32:49Z")

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Hello experts, I am writing a custom application to load in .pvd data and then volume render it. I am able to load in the data, and display at as representation types Surface, Points, Outline etc. But when I set it to V…

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## [ParaView plugin delayed load](https://discourse.paraview.org/t/paraview-plugin-delayed-load/13683)

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**Author:** [@mwestphal](https://discourse.paraview.org/u/mwestphal)\
**Replies:** 4\
**Last updated:** [March 22, 2024, 2:03pm UTC](https://discourse.paraview.org/t/paraview-plugin-delayed-load/13683 "2024-03-22T14:03:43Z")

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Some ParaView plugin contains a great number of filters and thus contains a lot of symbols. One such plugin is the TTK plugin. Loading many symbols can take some time, and when a plugin is set to autoload, ParaView use…

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## [Getting access to filter Proxy](https://discourse.paraview.org/t/getting-access-to-filter-proxy/14230)

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**Author:** [@joint](https://discourse.paraview.org/u/joint)\
**Replies:** 4\
**Last updated:** [March 22, 2024, 1:07pm UTC](https://discourse.paraview.org/t/getting-access-to-filter-proxy/14230 "2024-03-22T13:07:12Z")

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Hello dear Paraview Developers! I am trying to extend the GUI and I need to access my filter pxm-\>GetProxies("filters", "MyFilter", render\_view\_proxies); However, it does not work. There is no group as filters inside,…

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## [Deve](https://discourse.paraview.org/t/deve/14229)

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**Author:** [@joint](https://discourse.paraview.org/u/joint)\
**Replies:** 1\
**Last updated:** [March 22, 2024, 11:48am UTC](https://discourse.paraview.org/t/deve/14229 "2024-03-22T11:48:09Z")

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Hello dear ParaView developers! I want to add a function which receives an array of data from the server. For that I want to add a function to my filter, which returns std::vector of ints However, it does not seem to b…

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## [Programmatically generating a selection based on cell IDs - any comments?](https://discourse.paraview.org/t/programmatically-generating-a-selection-based-on-cell-ids-any-comments/14111)

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**Author:** [@cobo](https://discourse.paraview.org/u/cobo)\
**Replies:** 5\
**Last updated:** [March 21, 2024, 6:32am UTC](https://discourse.paraview.org/t/programmatically-generating-a-selection-based-on-cell-ids-any-comments/14111 "2024-03-21T06:32:51Z")

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Migrating a custom application from PV 5.10 to 5.12.0-RC3, I am running into a problem with my code that generates an ID’s based selection from within a property panel. This is what my code is doing and what was working…

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## [Cryptic error from hell: the same data is output by filter, but RenderView is not the same!!!](https://discourse.paraview.org/t/cryptic-error-from-hell-the-same-data-is-output-by-filter-but-renderview-is-not-the-same/14190)

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**Author:** [@joint](https://discourse.paraview.org/u/joint)\
**Replies:** 1\
**Last updated:** [March 18, 2024, 3:35pm UTC](https://discourse.paraview.org/t/cryptic-error-from-hell-the-same-data-is-output-by-filter-but-renderview-is-not-the-same/14190 "2024-03-18T15:35:22Z")

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Hello dear Paraview developers! I have faced an indeed, horrible, very cryptic error: I have my filter in two revisions which outputs some field data, but the SpreadSheetView1 is different. The data is indeed similar, …

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## [Plugin: Is RequestDataObject guaranteed to perform before widgets initialization?](https://discourse.paraview.org/t/plugin-is-requestdataobject-guaranteed-to-perform-before-widgets-initialization/14186)

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**Author:** [@joint](https://discourse.paraview.org/u/joint)\
**Replies:** 0\
**Last updated:** [March 18, 2024, 9:46am UTC](https://discourse.paraview.org/t/plugin-is-requestdataobject-guaranteed-to-perform-before-widgets-initialization/14186 "2024-03-18T09:46:29Z")

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Hello dear Paraview developers! I have a widget with performs some communications with my plugin, e.g. obtains some values which plugin gets from the file in the RequestDataObject function. The widget is written down i…

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## [How to get access to current pqRenderView?](https://discourse.paraview.org/t/how-to-get-access-to-current-pqrenderview/14166)

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**Author:** [@joint](https://discourse.paraview.org/u/joint)\
**Replies:** 1\
**Last updated:** [March 15, 2024, 11:03am UTC](https://discourse.paraview.org/t/how-to-get-access-to-current-pqrenderview/14166 "2024-03-15T11:03:26Z")

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Hello dear paraview developers! This is crucial for me achieving success, to access this class from my custom widget Could you please explain me how to get access to existing instance of this class from any place of pa…

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## [Programmatical active selection creation](https://discourse.paraview.org/t/programmatical-active-selection-creation/14163)

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**Author:** [@joint](https://discourse.paraview.org/u/joint)\
**Replies:** 0\
**Last updated:** [March 14, 2024, 6:56pm UTC](https://discourse.paraview.org/t/programmatical-active-selection-creation/14163 "2024-03-14T18:56:07Z")

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Hello dear Paraview developers! Could you please clarify, how to create active selection from c++ filter programmatically? Best regards

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## [What is UpdatePipeline?](https://discourse.paraview.org/t/what-is-updatepipeline/14158)

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**Author:** [@joint](https://discourse.paraview.org/u/joint)\
**Replies:** 2\
**Last updated:** [March 14, 2024, 3:16pm UTC](https://discourse.paraview.org/t/what-is-updatepipeline/14158 "2024-03-14T15:16:24Z")

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Hello everyone! This documentation mentions UpdatePipeline in Consider a filter proxy, say Clip , which has an input set via a InputProperty and a implicit function set via a ProxyProperty. If either the input or the …

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## [Is wiki ServerManager\_2.0 up to date?](https://discourse.paraview.org/t/is-wiki-servermanager-2-0-up-to-date/14156)

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**Author:** [@joint](https://discourse.paraview.org/u/joint)\
**Replies:** 3\
**Last updated:** [March 14, 2024, 2:11pm UTC](https://discourse.paraview.org/t/is-wiki-servermanager-2-0-up-to-date/14156 "2024-03-14T14:11:44Z")

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Hello dear Paraview developers! Could you verify this wiki page to be up-to-date https://www.paraview.org/ParaView/index.php/ServerManager\_2.0 Could you please advise me something more on this same topic? Thank you…

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## [Comprehensive guide about server manager/proxies which paraview uses?](https://discourse.paraview.org/t/comprehensive-guide-about-server-manager-proxies-which-paraview-uses/14144)

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**Author:** [@joint](https://discourse.paraview.org/u/joint)\
**Replies:** 0\
**Last updated:** [March 13, 2024, 10:02am UTC](https://discourse.paraview.org/t/comprehensive-guide-about-server-manager-proxies-which-paraview-uses/14144 "2024-03-13T10:02:57Z")

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Hello dear Paraview developers! Could you advise me please a comprehensive guide about server manager/proxies which paraview uses? Thanks

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## [Load Python plugins in Paraview (Linux)](https://discourse.paraview.org/t/load-python-plugins-in-paraview-linux/14131)

<div class="topic-metadata">

**Author:** [@enricsosa](https://discourse.paraview.org/u/enricsosa)\
**Replies:** 2\
**Last updated:** [March 12, 2024, 1:14pm UTC](https://discourse.paraview.org/t/load-python-plugins-in-paraview-linux/14131 "2024-03-12T13:14:09Z")

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Hi, I was following the instructions in section 5.5 of the Paraview’s reference manual (5. Programmable Filter — ParaView Documentation 5.12.0 documentation) because that’s what I want for my work, quoting the manual: “I…

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## [Adding a polyhedra source](https://discourse.paraview.org/t/adding-a-polyhedra-source/14084)

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**Author:** [@Alexandre\_Minot](https://discourse.paraview.org/u/Alexandre_Minot)\
**Replies:** 6\
**Last updated:** [March 4, 2024, 5:29pm UTC](https://discourse.paraview.org/t/adding-a-polyhedra-source/14084 "2024-03-04T17:29:53Z")

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Hello, Would it be valuable to add an arbitrary polyhedra source to ParaView? I think it would be a good addition to the existing data sources.

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