# Development

**URL:** https://discourse.paraview.org/c/development/6.md?no_subcategories=false&page=33

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

**Page:** 34

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## [Crashes - model size dependent](https://discourse.paraview.org/t/crashes-model-size-dependent/2055)

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**Author:** [@cobo](https://discourse.paraview.org/u/cobo)\
**Replies:** 0\
**Last updated:** [June 16, 2019, 3:43pm UTC](https://discourse.paraview.org/t/crashes-model-size-dependent/2055 "2019-06-16T15:43:59Z")

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My models are typically “unstructured grids”, and “normally” I assume that with a 64-bit architecture it should be possible to work with models that are many millions, tens of millions or even hundreds of cells and/or po…

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## [How to interact with PV classes using C++](https://discourse.paraview.org/t/how-to-interact-with-pv-classes-using-c/2020)

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**Author:** [@Toorall](https://discourse.paraview.org/u/Toorall)\
**Replies:** 2\
**Last updated:** [June 15, 2019, 7:55am UTC](https://discourse.paraview.org/t/how-to-interact-with-pv-classes-using-c/2020 "2019-06-15T07:55:26Z")

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Hello Everyone! I have created a plugin for PV that creates unstructured grid. But to load the generated grid I need to drug and drop it into PV. (Current version of my plugin has front end in ParaView, I mean buttons …

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## [I want to bulid paraview on windows, does anyone know whether or not windows support mpi4py? If windows support mpi4py, how can I add it? Thanks in advance.](https://discourse.paraview.org/t/i-want-to-bulid-paraview-on-windows-does-anyone-know-whether-or-not-windows-support-mpi4py-if-windows-support-mpi4py-how-can-i-add-it-thanks-in-advance/2016)

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**Author:** [@hdz19900725](https://discourse.paraview.org/u/hdz19900725)\
**Replies:** 2\
**Last updated:** [June 12, 2019, 1:07am UTC](https://discourse.paraview.org/t/i-want-to-bulid-paraview-on-windows-does-anyone-know-whether-or-not-windows-support-mpi4py-if-windows-support-mpi4py-how-can-i-add-it-thanks-in-advance/2016 "2019-06-12T01:07:46Z")

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## [Plugin Development](https://discourse.paraview.org/t/plugin-development/1568)

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**Author:** [@justinmadison](https://discourse.paraview.org/u/justinmadison)\
**Replies:** 6\
**Last updated:** [June 11, 2019, 3:55pm UTC](https://discourse.paraview.org/t/plugin-development/1568 "2019-06-11T15:55:21Z")

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Is there any documentation on how to use the current ParaView CMake plugin macros when developing a plugin? There are several repos that I can find as examples for plugin development but they all seem to use the older s…

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## [Logo source ? Logo Representation ? Watermark Settings ?](https://discourse.paraview.org/t/logo-source-logo-representation-watermark-settings/1943)

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**Author:** [@mwestphal](https://discourse.paraview.org/u/mwestphal)\
**Replies:** 2\
**Last updated:** [June 10, 2019, 2:45pm UTC](https://discourse.paraview.org/t/logo-source-logo-representation-watermark-settings/1943 "2019-06-10T14:45:36Z")

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Hi Guys, I’m thinking about adding a way to add a 2D image in the render view, like a watermark. There a few way to achieve that : A new “Logo” source, similar to the Text source, but with a png param. A new “Logo” r…

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## [Moving Data from client to server](https://discourse.paraview.org/t/moving-data-from-client-to-server/1993)

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**Author:** [@mwestphal](https://discourse.paraview.org/u/mwestphal)\
**Replies:** 15\
**Last updated:** [June 10, 2019, 2:09pm UTC](https://discourse.paraview.org/t/moving-data-from-client-to-server/1993 "2019-06-10T14:09:38Z")

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Hi All, There is currently no straightforward way to move a vtkDataObject from the client to the server. This is something we will definitely need and we have a few use cases. Open a small local file when working rem…

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## [Building plugins from examples](https://discourse.paraview.org/t/building-plugins-from-examples/2004)

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**Author:** [@Toorall](https://discourse.paraview.org/u/Toorall)\
**Replies:** 1\
**Last updated:** [June 9, 2019, 6:32pm UTC](https://discourse.paraview.org/t/building-plugins-from-examples/2004 "2019-06-09T18:32:02Z")

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Hello! I have successfully built Paraview v5.6.0 (cmake -G “Visual Studio 15 2017 Win64” -DCMAKE\_BUILD\_TYPE=Release -DPARAVIEW\_BUILD\_QT\_GUI=ON …\\ParaView-v5.6.0) , then built it using visual studio 2017 (Release, x64). …

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## [ParaView 5.6.0 crash when loading raw binary file](https://discourse.paraview.org/t/paraview-5-6-0-crash-when-loading-raw-binary-file/1974)

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**Author:** [@jvanderk](https://discourse.paraview.org/u/jvanderk)\
**Replies:** 6\
**Last updated:** [June 7, 2019, 11:59am UTC](https://discourse.paraview.org/t/paraview-5-6-0-crash-when-loading-raw-binary-file/1974 "2019-06-07T11:59:59Z")

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Hi all, I am using ParaView-5.6.0-MPI-Linux-64bit that I downloaded from paraview.org. I have a binary file of 16 x 16 x 16 floats in little endian that I try to load in ParaView using “Image Reader”. I then use: Data…

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## [Paraview Plugin Mulitple Output port](https://discourse.paraview.org/t/paraview-plugin-mulitple-output-port/1985)

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**Author:** [@Sugumar](https://discourse.paraview.org/u/Sugumar)\
**Replies:** 6\
**Last updated:** [June 5, 2019, 1:48pm UTC](https://discourse.paraview.org/t/paraview-plugin-mulitple-output-port/1985 "2019-06-05T13:48:50Z")

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Hello , I am into writing a plugin for Paraview, I am having three output ports. The first port Structure is for Multi-block data set and second port Property is for Structured Grid and the third port Settings is vtkT…

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## [2 processes read 3 files into vtkMultiBlockDataSet cannot display correctly in server-client mode](https://discourse.paraview.org/t/2-processes-read-3-files-into-vtkmultiblockdataset-cannot-display-correctly-in-server-client-mode/1967)

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**Author:** [@sharon](https://discourse.paraview.org/u/sharon)\
**Replies:** 2\
**Last updated:** [June 4, 2019, 11:42pm UTC](https://discourse.paraview.org/t/2-processes-read-3-files-into-vtkmultiblockdataset-cannot-display-correctly-in-server-client-mode/1967 "2019-06-04T23:42:07Z")

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Dear Experts, I distribute 3 files to 2 process to generate 3 vtkMultiBlockDataSet, but paraview UI cannot display successfully… I tried two situations: \<1\> Situation 1 Set numberOfBlock=3 for both process\_0 and pro…

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## [Plugin for paraview compiled for offscreen](https://discourse.paraview.org/t/plugin-for-paraview-compiled-for-offscreen/1983)

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**Author:** [@Chris\_Marsh](https://discourse.paraview.org/u/Chris_Marsh)\
**Replies:** 0\
**Last updated:** [June 3, 2019, 8:05pm UTC](https://discourse.paraview.org/t/plugin-for-paraview-compiled-for-offscreen/1983 "2019-06-03T20:05:50Z")

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I’m trying to compile a paraview plugin for a system that has paraview compiled as offscreen. The plugin is Unfortunately, when I try to make this, I get errors about libEGL make\[2\]: \*\*\* No rule to make target ‘/usr…

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## [How to gracefully avoid unnecessary data reading when just change some option on UI](https://discourse.paraview.org/t/how-to-gracefully-avoid-unnecessary-data-reading-when-just-change-some-option-on-ui/1922)

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**Author:** [@sharon](https://discourse.paraview.org/u/sharon)\
**Replies:** 6\
**Last updated:** [May 28, 2019, 10:23pm UTC](https://discourse.paraview.org/t/how-to-gracefully-avoid-unnecessary-data-reading-when-just-change-some-option-on-ui/1922 "2019-05-28T22:23:54Z")

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Dear Experts, I wrote my own reader plugin, which can reader data from a file successfully However, I also add some options on the UI to control how to convert raw data into vtk data, but these control option have noth…

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## [ERROR: vtkMultiBlockDataSetStructure does not match. You must use CopyStructure before calling this method.](https://discourse.paraview.org/t/error-vtkmultiblockdatasetstructure-does-not-match-you-must-use-copystructure-before-calling-this-method/1940)

<div class="topic-metadata">

**Author:** [@sharon](https://discourse.paraview.org/u/sharon)\
**Replies:** 0\
**Last updated:** [May 28, 2019, 1:38pm UTC](https://discourse.paraview.org/t/error-vtkmultiblockdatasetstructure-does-not-match-you-must-use-copystructure-before-calling-this-method/1940 "2019-05-28T13:38:22Z")

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Dear Experts, my reader read many files by parallel and all data will be converted into vtkPolyData then add into vtkMultiBlockDataSet, it works OK, but sometimes, paraview report below error: ERROR: In paraview\\VTK\\Co…

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## [Question regarding Paraview 5.7 and OptiX Raytracing + Nvidia Index Plugin Volume Rendering](https://discourse.paraview.org/t/question-regarding-paraview-5-7-and-optix-raytracing-nvidia-index-plugin-volume-rendering/1932)

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**Author:** [@Gabriel\_Axtmann](https://discourse.paraview.org/u/Gabriel_Axtmann)\
**Replies:** 2\
**Last updated:** [May 28, 2019, 1:33pm UTC](https://discourse.paraview.org/t/question-regarding-paraview-5-7-and-optix-raytracing-nvidia-index-plugin-volume-rendering/1932 "2019-05-28T13:33:00Z")

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Hi, not sure if this is the correct category, I am just curious, in PV 5.7 OptiX Raytracing algorithm is implemented. Is it possible to use Volume Rendering (best with Nvidia Index Plugin) and RayTracing algorithms toge…

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## [Recommendation on unit test / testing strategy for paraview based application or paraview plugins](https://discourse.paraview.org/t/recommendation-on-unit-test-testing-strategy-for-paraview-based-application-or-paraview-plugins/1936)

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**Author:** [@sharon](https://discourse.paraview.org/u/sharon)\
**Replies:** 2\
**Last updated:** [May 28, 2019, 12:51pm UTC](https://discourse.paraview.org/t/recommendation-on-unit-test-testing-strategy-for-paraview-based-application-or-paraview-plugins/1936 "2019-05-28T12:51:12Z")

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Dear Experts, Could you please give me some instructions / recommendation for testing paraview based application or paraview plugins. I developed some paraview plugins, like readers, filters, and i also want to develop…

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## [Is a "NamedValuesDomain" a good addition ?](https://discourse.paraview.org/t/is-a-namedvaluesdomain-a-good-addition/1892)

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**Author:** [@mwestphal](https://discourse.paraview.org/u/mwestphal)\
**Replies:** 4\
**Last updated:** [May 21, 2019, 12:50pm UTC](https://discourse.paraview.org/t/is-a-namedvaluesdomain-a-good-addition/1892 "2019-05-21T12:50:06Z")

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In ParaView, ArraySelectionDomain allows to select wich array (actually which string) to enable/disable on a vtk object, using a widget like this one : StringListDomain, in the other hand, allow to select a single str…

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## [the case of vtkSIArraySelectionProperty and ArraySelectionDomain](https://discourse.paraview.org/t/the-case-of-vtksiarrayselectionproperty-and-arrayselectiondomain/1889)

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**Author:** [@mwestphal](https://discourse.paraview.org/u/mwestphal)\
**Replies:** 6\
**Last updated:** [May 21, 2019, 12:41pm UTC](https://discourse.paraview.org/t/the-case-of-vtksiarrayselectionproperty-and-arrayselectiondomain/1889 "2019-05-21T12:41:18Z")

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I have a usecase which is very similar to ArraySelectionDomain. A vtk class define a few named entities. Each of these can be enabled or disabled. If these were arrays, I could use ArraySelectionDomain and it will be p…

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## [Create a reader plugin to read multiple files into one vtkMultiBlockDataSet](https://discourse.paraview.org/t/create-a-reader-plugin-to-read-multiple-files-into-one-vtkmultiblockdataset/1895)

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**Author:** [@sharon](https://discourse.paraview.org/u/sharon)\
**Replies:** 9\
**Last updated:** [May 21, 2019, 12:39pm UTC](https://discourse.paraview.org/t/create-a-reader-plugin-to-read-multiple-files-into-one-vtkmultiblockdataset/1895 "2019-05-21T12:39:40Z")

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Dear Experts, Is it possible to write a reader plugin that can read multiple files’ content into one vtkMultiBlockDataSet? In my situation, the data in each file is just a small block of the whole data, so i need to re…

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## [Bug Report for latest source code on Git compare to latest released version](https://discourse.paraview.org/t/bug-report-for-latest-source-code-on-git-compare-to-latest-released-version/1881)

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**Author:** [@sharon](https://discourse.paraview.org/u/sharon)\
**Replies:** 4\
**Last updated:** [May 20, 2019, 1:56pm UTC](https://discourse.paraview.org/t/bug-report-for-latest-source-code-on-git-compare-to-latest-released-version/1881 "2019-05-20T13:56:57Z")

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Dear ParaViewers, I found there is one difference between latest released paraview and latest one on Git: Look at below picture, the latest version on GitHub have extra dash-line on the edge when rotate the box in pict…

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## [How to set the default value for representation?](https://discourse.paraview.org/t/how-to-set-the-default-value-for-representation/1834)

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**Author:** [@caobaolu](https://discourse.paraview.org/u/caobaolu)\
**Replies:** 3\
**Last updated:** [May 18, 2019, 3:16am UTC](https://discourse.paraview.org/t/how-to-set-the-default-value-for-representation/1834 "2019-05-18T03:16:22Z")

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Dear all, I am trying to change the default value of the representation through adding a plugin. for example, i want to change the default line width from 1 to 4, how can i acheive this? I tried to change the xml sett…

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## [Compiling PV superbuild with cmd VS2017](https://discourse.paraview.org/t/compiling-pv-superbuild-with-cmd-vs2017/1757)

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**Author:** [@Toorall](https://discourse.paraview.org/u/Toorall)\
**Replies:** 4\
**Last updated:** [May 17, 2019, 12:18pm UTC](https://discourse.paraview.org/t/compiling-pv-superbuild-with-cmd-vs2017/1757 "2019-05-17T12:18:16Z")

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Hello everyone! I try to compile PV superbuild master branch from x64 Command prompt for VS2017. It seems to compile successfully but I cannot find paraview.exe in build directory. to build it I used: cmake -G Ninja …

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## [Autoloading VTKPythonAlgorithmBase plugins with CMake](https://discourse.paraview.org/t/autoloading-vtkpythonalgorithmbase-plugins-with-cmake/1861)

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**Author:** [@phil\_ossk](https://discourse.paraview.org/u/phil_ossk)\
**Replies:** 0\
**Last updated:** [May 15, 2019, 3:31pm UTC](https://discourse.paraview.org/t/autoloading-vtkpythonalgorithmbase-plugins-with-cmake/1861 "2019-05-15T15:31:51Z")

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Hello there, I have a couple plugins that I developed using the VTKPythonAlgorithmBase class. I would like them to be built along with my main project so that they would be loaded automatically after a fresh install. S…

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## [gui elements created dynamically](https://discourse.paraview.org/t/gui-elements-created-dynamically/1827)

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**Author:** [@marco\_accardo](https://discourse.paraview.org/u/marco_accardo)\
**Replies:** 4\
**Last updated:** [May 15, 2019, 3:02pm UTC](https://discourse.paraview.org/t/gui-elements-created-dynamically/1827 "2019-05-15T15:02:20Z")

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Is it possible using python plugin/live-source to have the gui pane dynamically populated at run time. after importing an stl file I want to put a range control on the gui based on the data i just read in. I see how to…

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## [Superbuild - turning Paraview features on and off](https://discourse.paraview.org/t/superbuild-turning-paraview-features-on-and-off/1860)

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**Author:** [@cobo](https://discourse.paraview.org/u/cobo)\
**Replies:** 2\
**Last updated:** [May 15, 2019, 12:24pm UTC](https://discourse.paraview.org/t/superbuild-turning-paraview-features-on-and-off/1860 "2019-05-15T12:24:39Z")

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I am a bit lost with the Paraview superbuild! I have my “forked” and adapted version of it, but most of it is of course just the original, but I have problems to turn options on and off like I do it if I am building Para…

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## [Paraview wiget](https://discourse.paraview.org/t/paraview-wiget/1851)

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**Author:** [@Deepen](https://discourse.paraview.org/u/Deepen)\
**Replies:** 1\
**Last updated:** [May 14, 2019, 12:15pm UTC](https://discourse.paraview.org/t/paraview-wiget/1851 "2019-05-14T12:15:04Z")

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Hi, I am facing issue while try to create a 3D widget in paraview. While i create a QLabel and make it a child of parent then it is coming at the bottom of parent widget. I want have the image (QLabel) inside the parent…

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## [Link camera views via python script](https://discourse.paraview.org/t/link-camera-views-via-python-script/1841)

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**Author:** [@Rojj](https://discourse.paraview.org/u/Rojj)\
**Replies:** 3\
**Last updated:** [May 13, 2019, 2:55pm UTC](https://discourse.paraview.org/t/link-camera-views-via-python-script/1841 "2019-05-13T14:55:50Z")

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I am generating 4 different RenderViews via Python. Is there a way to programmatically link them together (Right click on view -\> Link camera). I have tried to trace while doing it manually, but there is no sign of this…

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## [Applying georeferenced image to topo surface](https://discourse.paraview.org/t/applying-georeferenced-image-to-topo-surface/1809)

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**Author:** [@cobo](https://discourse.paraview.org/u/cobo)\
**Replies:** 6\
**Last updated:** [May 13, 2019, 8:11am UTC](https://discourse.paraview.org/t/applying-georeferenced-image-to-topo-surface/1809 "2019-05-13T08:11:06Z")

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After finding out how nicely the GDAL library is giving me the georeferencing not only of Geotiff files, but also other types of georeferencing (like ESRI world files), I was able to generate a filter like the “Texture M…

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## [Defining a new SideSet in Exodus file](https://discourse.paraview.org/t/defining-a-new-sideset-in-exodus-file/1825)

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**Author:** [@Mariana\_Rodriguez](https://discourse.paraview.org/u/Mariana_Rodriguez)\
**Replies:** 0\
**Last updated:** [May 10, 2019, 7:12pm UTC](https://discourse.paraview.org/t/defining-a-new-sideset-in-exodus-file/1825 "2019-05-10T19:12:01Z")

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Hi, I have a .e file that contains the results of my simulation. I need to use that .e file to run another simulation, but this new simulation needs a new sideset (different from the sidesets defined in the first mesh)…

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## [How to correctly add a reader plugin?](https://discourse.paraview.org/t/how-to-correctly-add-a-reader-plugin/1789)

<div class="topic-metadata">

**Author:** [@caobaolu](https://discourse.paraview.org/u/caobaolu)\
**Replies:** 10\
**Last updated:** [May 9, 2019, 12:43pm UTC](https://discourse.paraview.org/t/how-to-correctly-add-a-reader-plugin/1789 "2019-05-09T12:43:44Z")

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Dear all, I’ve tried several days to build my own plugin and resulted in no success. I managed to compile ParaView from source and tried the sample plugin called mypngreader. After I load the plugin and try to open the …

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## [Dynamic ParaView plugins using python](https://discourse.paraview.org/t/dynamic-paraview-plugins-using-python/1793)

<div class="topic-metadata">

**Author:** [@siver](https://discourse.paraview.org/u/siver)\
**Replies:** 2\
**Last updated:** [May 8, 2019, 12:09pm UTC](https://discourse.paraview.org/t/dynamic-paraview-plugins-using-python/1793 "2019-05-08T12:09:21Z")

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Dear PV devs, Greetings. To put it briefly, I am attempting to write a PV plugin that reads a case and shows array names with respective buttons/sliders/etc next to them, i.e. if there are 3 variables, show 3 buttons, i…

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