# Development

**URL:** https://discourse.paraview.org/c/development/6.md?no_subcategories=false&page=19

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

**Page:** 20

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## [Join Tables Filter](https://discourse.paraview.org/t/join-tables-filter/8333)

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**Author:** [@aschieb](https://discourse.paraview.org/u/aschieb)\
**Replies:** 2\
**Last updated:** [November 8, 2021, 8:18am UTC](https://discourse.paraview.org/t/join-tables-filter/8333 "2021-11-08T08:18:36Z")

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Hello to the ParaView discourse community! In the context of improving Table data processing and manipulation in ParaView, a few features which I have been contributing to have recently been implemented. These contribut…

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## [Additional include directories with paraview plugin builder](https://discourse.paraview.org/t/additional-include-directories-with-paraview-plugin-builder/8101)

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**Author:** [@anthomas](https://discourse.paraview.org/u/anthomas)\
**Replies:** 11\
**Last updated:** [November 4, 2021, 9:48am UTC](https://discourse.paraview.org/t/additional-include-directories-with-paraview-plugin-builder/8101 "2021-11-04T09:48:04Z")

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On windows, adding an include directory with include\_directories(path) in cmakelists.txt worked. The same does not work with paraview plugin builder, I have also tried adding it into a plugin.cmake file with no success. …

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## [how to draw parametric surfaces with equations?](https://discourse.paraview.org/t/how-to-draw-parametric-surfaces-with-equations/8178)

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**Author:** [@joaocqmiranda](https://discourse.paraview.org/u/joaocqmiranda)\
**Replies:** 7\
**Last updated:** [October 26, 2021, 3:53pm UTC](https://discourse.paraview.org/t/how-to-draw-parametric-surfaces-with-equations/8178 "2021-10-26T15:53:49Z")

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for example you type the equations for x,y,z and get the respective surface

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## [Internal Mpich is being rebuilt unnecessarily when reruning the ParaView superbuild for 5.10.0-RC1](https://discourse.paraview.org/t/internal-mpich-is-being-rebuilt-unnecessarily-when-reruning-the-paraview-superbuild-for-5-10-0-rc1/8226)

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**Author:** [@joeh](https://discourse.paraview.org/u/joeh)\
**Replies:** 7\
**Last updated:** [October 26, 2021, 1:04pm UTC](https://discourse.paraview.org/t/internal-mpich-is-being-rebuilt-unnecessarily-when-reruning-the-paraview-superbuild-for-5-10-0-rc1/8226 "2021-10-26T13:04:30Z")

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When rerunning the superbuild script for ParaVIew 5.10.0-RCI with the internally built Mpich 3.4.2. Mpich is being rebuilt each time even though it successfully built on the previous pass. This is slowing down debuggin…

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## [Problem compiling OSMesa as part of ParaView 5.10.0-RC1 on Power 9 Architecture](https://discourse.paraview.org/t/problem-compiling-osmesa-as-part-of-paraview-5-10-0-rc1-on-power-9-architecture/8255)

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**Author:** [@joeh](https://discourse.paraview.org/u/joeh)\
**Replies:** 3\
**Last updated:** [October 26, 2021, 7:56am UTC](https://discourse.paraview.org/t/problem-compiling-osmesa-as-part-of-paraview-5-10-0-rc1-on-power-9-architecture/8255 "2021-10-26T07:56:59Z")

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Hello, I am having an issue compiling OSMesa as part of ParaView 5.10.0-RC1 on a Power 9 Architecture System. Even though I am using -Dmesa\_USE\_SWR=OFF \\ It still seems to be tryng to compile SWR which requires AVX, …

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## [Problem compiling Mesa as part of SuperBuild of ParaView 5.10.0-RC1 on Power 9 Architecture](https://discourse.paraview.org/t/problem-compiling-mesa-as-part-of-superbuild-of-paraview-5-10-0-rc1-on-power-9-architecture/8254)

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**Author:** [@joeh](https://discourse.paraview.org/u/joeh)\
**Replies:** 0\
**Last updated:** [October 25, 2021, 3:40pm UTC](https://discourse.paraview.org/t/problem-compiling-mesa-as-part-of-superbuild-of-paraview-5-10-0-rc1-on-power-9-architecture/8254 "2021-10-25T15:40:43Z")

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There is a problem on compiling Mesa as part of the Superbuild of ParaView 5.10.0-RC on a Power 9 Architecture system. Here is the end of the file Build\_directory/superbuild/mesa/src/build/meson-logs/meson-log.txt whi…

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## [Make a custom app with PyQt5 or Pyside](https://discourse.paraview.org/t/make-a-custom-app-with-pyqt5-or-pyside/2953)

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**Author:** [@gon\_alo](https://discourse.paraview.org/u/gon_alo)\
**Replies:** 2\
**Last updated:** [October 23, 2021, 6:15pm UTC](https://discourse.paraview.org/t/make-a-custom-app-with-pyqt5-or-pyside/2953 "2021-10-23T18:15:18Z")

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I want to make a custom app with PyQt5 ( GPL and commercial license) or Pyside2 ( LGPL), that uses ParaView Framework. But I’m having problem with the license. Do I have to pay to use it? How much?

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## [Why no vtkStringArray as active attribute?](https://discourse.paraview.org/t/why-no-vtkstringarray-as-active-attribute/8232)

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**Author:** [@cobo](https://discourse.paraview.org/u/cobo)\
**Replies:** 0\
**Last updated:** [October 22, 2021, 7:17am UTC](https://discourse.paraview.org/t/why-no-vtkstringarray-as-active-attribute/8232 "2021-10-22T07:17:08Z")

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Within the vtkDataSetAttributes::SetActiveAttribute function, an error message will be issued and no action taken if the provided attribute is not a vtkDataArray, so a vtkStringArray would not qualify. I am calling this…

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## [Conflict between boost and las when building ParaView 5.10.0-RC1](https://discourse.paraview.org/t/conflict-between-boost-and-las-when-building-paraview-5-10-0-rc1/8225)

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**Author:** [@joeh](https://discourse.paraview.org/u/joeh)\
**Replies:** 2\
**Last updated:** [October 19, 2021, 11:42pm UTC](https://discourse.paraview.org/t/conflict-between-boost-and-las-when-building-paraview-5-10-0-rc1/8225 "2021-10-19T23:42:05Z")

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There is a conflict between the boost and las versions when building ParaView 5.10.0-RC1 with the superbuild script. las is looking for the file Build\_directory/install/include/boost/detail/endian.hpp which was presen…

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## [ParaView 5.10.0 RC1 Show/Hide Icon Missing](https://discourse.paraview.org/t/paraview-5-10-0-rc1-show-hide-icon-missing/8196)

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**Author:** [@theodorebaltis](https://discourse.paraview.org/u/theodorebaltis)\
**Replies:** 6\
**Last updated:** [October 18, 2021, 5:44pm UTC](https://discourse.paraview.org/t/paraview-5-10-0-rc1-show-hide-icon-missing/8196 "2021-10-18T17:44:11Z")

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In 5.10.0-RC1 (Windows MPI exe) I’ve found that when I add a filter via the Python Shell the visibility icon is initially not shown at all. Clip() produces: If I click in that void or use Show() it then appears. I…

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## [Custom texturing representation not any more working with version 5.9.1](https://discourse.paraview.org/t/custom-texturing-representation-not-any-more-working-with-version-5-9-1/8151)

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**Author:** [@cobo](https://discourse.paraview.org/u/cobo)\
**Replies:** 2\
**Last updated:** [October 17, 2021, 8:15pm UTC](https://discourse.paraview.org/t/custom-texturing-representation-not-any-more-working-with-version-5-9-1/8151 "2021-10-17T20:15:55Z")

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In a ParaView custom application, I have a “textured representation” class which is derived from vtkGeometryRepresentationWithFaces. The purpose is to allow draping a texture over a triangulated surface that “understands…

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## [ParaView 5.10.0 RC1 Extract Block Selectors](https://discourse.paraview.org/t/paraview-5-10-0-rc1-extract-block-selectors/8194)

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**Author:** [@theodorebaltis](https://discourse.paraview.org/u/theodorebaltis)\
**Replies:** 3\
**Last updated:** [October 16, 2021, 12:38pm UTC](https://discourse.paraview.org/t/paraview-5-10-0-rc1-extract-block-selectors/8194 "2021-10-16T12:38:15Z")

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I tried the new ExtractBlock filter and it functions just as expected (no more changing parts between timestates!) but I have a few comments/concerns. From what I see the only way to directly set the xpath-style selec…

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## [eliminate color transition for line whose two points have different color](https://discourse.paraview.org/t/eliminate-color-transition-for-line-whose-two-points-have-different-color/8197)

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**Author:** [@sharon](https://discourse.paraview.org/u/sharon)\
**Replies:** 0\
**Last updated:** [October 16, 2021, 3:26am UTC](https://discourse.paraview.org/t/eliminate-color-transition-for-line-whose-two-points-have-different-color/8197 "2021-10-16T03:26:37Z")

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Dear All, when i set color scalar value for all line points, lines that have two different colors will have color transition effect automatically, but in my situation, i want line to be one of defined color not transiti…

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## [Qt licensing changes](https://discourse.paraview.org/t/qt-licensing-changes/6438)

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**Author:** [@olesenm](https://discourse.paraview.org/u/olesenm)\
**Replies:** 2\
**Last updated:** [October 12, 2021, 7:12am UTC](https://discourse.paraview.org/t/qt-licensing-changes/6438 "2021-10-12T07:12:32Z")

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How will the changes in the Qt licensing model for their LTS versions affect ParaView? Seems to be the end of the line for Qt5. Will this force an early shift to Qt6 for ParaView? Is there a softer upgrade path? Where …

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## [Unable to include some vtk classes in c++ plugin](https://discourse.paraview.org/t/unable-to-include-some-vtk-classes-in-c-plugin/8152)

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**Author:** [@anthomas](https://discourse.paraview.org/u/anthomas)\
**Replies:** 1\
**Last updated:** [October 11, 2021, 9:10am UTC](https://discourse.paraview.org/t/unable-to-include-some-vtk-classes-in-c-plugin/8152 "2021-10-11T09:10:10Z")

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I am currently unable to include the vtkSTLReader class and vtkNamedColors class in a c++ plugin. I believe my issues are with the cmake files. I included the plugin here: pvOptUMesh.zip (31.2 KB) It is being built from …

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## [Volume rendering multiblock datasets with 3D uniform grids](https://discourse.paraview.org/t/volume-rendering-multiblock-datasets-with-3d-uniform-grids/8121)

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**Author:** [@jfavre](https://discourse.paraview.org/u/jfavre)\
**Replies:** 0\
**Last updated:** [October 4, 2021, 3:08pm UTC](https://discourse.paraview.org/t/volume-rendering-multiblock-datasets-with-3d-uniform-grids/8121 "2021-10-04T15:08:37Z")

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Release notes for 5.9.0 advertized the fact that one could volume render an MB dataset made of only vtkImageData. (I could never make this work). I am now testing this with 5.10.0-RC1, and I can’t make it happen either.…

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## [New deprecation macros](https://discourse.paraview.org/t/new-deprecation-macros/8116)

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**Author:** [@ben.boeckel](https://discourse.paraview.org/u/ben.boeckel)\
**Replies:** 0\
**Last updated:** [October 3, 2021, 2:05am UTC](https://discourse.paraview.org/t/new-deprecation-macros/8116 "2021-10-03T02:05:59Z")

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Hi, Following VTK, ParaView will be getting deprecation macros instead of relying on vtkLegacy.h macros that make APIs disappear based on build flags. Instead, users will get warnings upon the use of deprecated APIs whi…

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## [Again - the Windows command line length limit](https://discourse.paraview.org/t/again-the-windows-command-line-length-limit/8080)

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**Author:** [@cobo](https://discourse.paraview.org/u/cobo)\
**Replies:** 1\
**Last updated:** [September 27, 2021, 12:39pm UTC](https://discourse.paraview.org/t/again-the-windows-command-line-length-limit/8080 "2021-09-27T12:39:36Z")

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The ParaView derived custom application builds nicely, but during the “superbuild” appears a bug that is somehow not understandable… After many other reasons were excluded, it looks like I am hitting once more that stup…

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## [ParaView's default reader selection](https://discourse.paraview.org/t/paraviews-default-reader-selection/7210)

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**Author:** [@utkarsh.ayachit](https://discourse.paraview.org/u/utkarsh.ayachit)\
**Replies:** 25\
**Last updated:** [September 24, 2021, 4:22pm UTC](https://discourse.paraview.org/t/paraviews-default-reader-selection/7210 "2021-09-24T16:22:51Z")

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Whenever there is more than one reader that ParaView thinks can support an particular file extension, ParaView pops up a Select Reader dialog. There are some pedantic exceptions to this rule, but let’s ignore those for t…

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## [Animation of a Transform Matrix (CVS reader)](https://discourse.paraview.org/t/animation-of-a-transform-matrix-cvs-reader/8040)

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**Author:** [@joaocqmiranda](https://discourse.paraview.org/u/joaocqmiranda)\
**Replies:** 6\
**Last updated:** [September 23, 2021, 11:51am UTC](https://discourse.paraview.org/t/animation-of-a-transform-matrix-cvs-reader/8040 "2021-09-23T11:51:04Z")

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I want animate a Transform Matrix based on a CVS file. And also need that the reader skip the first row of CVS file and merge the consecutive delimiter

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## [Build a GUI Plugin in python and interaction with a](https://discourse.paraview.org/t/build-a-gui-plugin-in-python-and-interaction-with-a/8041)

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**Author:** [@joaocqmiranda](https://discourse.paraview.org/u/joaocqmiranda)\
**Replies:** 1\
**Last updated:** [September 21, 2021, 11:43am UTC](https://discourse.paraview.org/t/build-a-gui-plugin-in-python-and-interaction-with-a/8041 "2021-09-21T11:43:53Z")

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I want to Build a GUI Plugin in python, if you could send to any examples it would be great. And I also want that a button on GUI that run a EXE (that I already made and it writes a py file). And after writing it i want…

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## [Plugin build in python](https://discourse.paraview.org/t/plugin-build-in-python/8007)

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**Author:** [@joaocqmiranda](https://discourse.paraview.org/u/joaocqmiranda)\
**Replies:** 4\
**Last updated:** [September 21, 2021, 11:17am UTC](https://discourse.paraview.org/t/plugin-build-in-python/8007 "2021-09-21T11:17:48Z")

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Hi! I am trying to build a plugin in python. Can you send to me a Plugin example to be easier to me to build it. A Plugin reader and some Plugin with botons on the painel.

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## [Reveal underlying codes when executing commands in the paraView GUI](https://discourse.paraview.org/t/reveal-underlying-codes-when-executing-commands-in-the-paraview-gui/7878)

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**Author:** [@massisenergy](https://discourse.paraview.org/u/massisenergy)\
**Replies:** 6\
**Last updated:** [September 18, 2021, 5:06pm UTC](https://discourse.paraview.org/t/reveal-underlying-codes-when-executing-commands-in-the-paraview-gui/7878 "2021-09-18T17:06:21Z")

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This is probably a noob question, but not unlikely from a inexperienced python/ParaView/C++ programmer & user of ParaView – I would like to automate some stuffs (python or C++ scripting?) but dunno how to start since I’…

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## [Adding a reader plugin via VisIt Bridge](https://discourse.paraview.org/t/adding-a-reader-plugin-via-visit-bridge/2177)

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**Author:** [@bfovet](https://discourse.paraview.org/u/bfovet)\
**Replies:** 14\
**Last updated:** [September 17, 2021, 1:31pm UTC](https://discourse.paraview.org/t/adding-a-reader-plugin-via-visit-bridge/2177 "2021-09-17T13:31:17Z")

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Hello, I’ve got a VisIt database plugin that i’d like to add to Paraview (which I built from source with PARAVIEW\_USE\_VISITBRIDGE=ON and Boost\_INCLUDE\_DIR is set). In my plugin directory, I created a CMakeLists.txt sim…

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## [GUI freezing when loading large dataset, another thread for busy indication?](https://discourse.paraview.org/t/gui-freezing-when-loading-large-dataset-another-thread-for-busy-indication/7937)

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**Author:** [@sharon](https://discourse.paraview.org/u/sharon)\
**Replies:** 2\
**Last updated:** [September 12, 2021, 11:13am UTC](https://discourse.paraview.org/t/gui-freezing-when-loading-large-dataset-another-thread-for-busy-indication/7937 "2021-09-12T11:13:26Z")

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Dear All, Paraview GUI will freezing when loading large dataset, for some new users, they thought program is dead, and dont know it is busy. I know we have the progress bar at the bottom of GUI, but it is sometimes not…

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## [Can't import paraview.simple using pip or even import the module](https://discourse.paraview.org/t/cant-import-paraview-simple-using-pip-or-even-import-the-module/7936)

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**Author:** [@Tiago\_Mimoso](https://discourse.paraview.org/u/Tiago_Mimoso)\
**Replies:** 3\
**Last updated:** [September 10, 2021, 1:27pm UTC](https://discourse.paraview.org/t/cant-import-paraview-simple-using-pip-or-even-import-the-module/7936 "2021-09-10T13:27:03Z")

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Hello, I’m a master student and I’m facing the same problem in terms of import just the paraview.simple module. I tried to use the pip as I did with all the other libraries that I want. The error message is “ERROR: Co…

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## [Remove AutoMPI?](https://discourse.paraview.org/t/remove-autompi/7952)

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**Author:** [@cory.quammen](https://discourse.paraview.org/u/cory.quammen)\
**Replies:** 7\
**Last updated:** [September 8, 2021, 5:26pm UTC](https://discourse.paraview.org/t/remove-autompi/7952 "2021-09-08T17:26:48Z")

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AutoMPI is a boolean setting in ParaView that, when enabled, launches a server process with mpiexec when the ParaView client runs, then the client connects to that server. It was created as a convenient way to enable par…

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## [Slider usage in ParaView](https://discourse.paraview.org/t/slider-usage-in-paraview/7913)

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**Author:** [@mwestphal](https://discourse.paraview.org/u/mwestphal)\
**Replies:** 4\
**Last updated:** [September 7, 2021, 5:18pm UTC](https://discourse.paraview.org/t/slider-usage-in-paraview/7913 "2021-09-07T17:18:06Z")

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Slider are not great tools to interact with the interface of ParaView. There is currently two ways to interact with sliders in ParaView: Click on the slider mover, move it and release it Click anywhere on the slider t…

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## [xarray in pvpython](https://discourse.paraview.org/t/xarray-in-pvpython/7930)

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**Author:** [@jmake](https://discourse.paraview.org/u/jmake)\
**Replies:** 1\
**Last updated:** [September 3, 2021, 7:31pm UTC](https://discourse.paraview.org/t/xarray-in-pvpython/7930 "2021-09-03T19:31:14Z")

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Hi, Have somebody tried to use xarray \[1\] inside a pvpython script?? Something likes : import paraview.simple import \* import numpy import xarray Thanks. \[1\]

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## [Merging results from parallelized operations in Python plugin](https://discourse.paraview.org/t/merging-results-from-parallelized-operations-in-python-plugin/7909)

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**Author:** [@csniker](https://discourse.paraview.org/u/csniker)\
**Replies:** 2\
**Last updated:** [September 2, 2021, 6:14pm UTC](https://discourse.paraview.org/t/merging-results-from-parallelized-operations-in-python-plugin/7909 "2021-09-02T18:14:48Z")

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I am writing a Python plugin using the VTKPythonAlgorithmBase class. I am performing an operation across many blocks within an input MultiBlockDataSet. I also need this operation to be tolerant of being run in parallel. …

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