# Development

**URL:** https://discourse.paraview.org/c/development/6.md?no_subcategories=false&page=17

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**Page:** 18

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## [Interest in developing the reader for AMReX data](https://discourse.paraview.org/t/interest-in-developing-the-reader-for-amrex-data/9381)

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**Author:** [@Erik\_Palmer](https://discourse.paraview.org/u/Erik_Palmer)\
**Replies:** 4\
**Last updated:** [April 25, 2022, 6:54pm UTC](https://discourse.paraview.org/t/interest-in-developing-the-reader-for-amrex-data/9381 "2022-04-25T18:54:49Z")

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Hi, I am interested in contributing some changes to the reader for AMReX data. I am considering changes that might address issues regarding the file format such as the one mentioned here: https://gitlab.kitware.com/para…

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## [About "session" in pqServerResource](https://discourse.paraview.org/t/about-session-in-pqserverresource/9414)

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**Author:** [@mwestphal](https://discourse.paraview.org/u/mwestphal)\
**Replies:** 4\
**Last updated:** [April 21, 2022, 12:40pm UTC](https://discourse.paraview.org/t/about-session-in-pqserverresource/9414 "2022-04-21T12:40:30Z")

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In ParaView, all “resource” are reprsented as pqServerResource, which can be converted to an URI and is stored in the settings of ParaView so that they can be presented in the “recently used resources” menu. The current…

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## [Call pvbatch.exe from a Python script with as argument a file path containing Japanese characters](https://discourse.paraview.org/t/call-pvbatch-exe-from-a-python-script-with-as-argument-a-file-path-containing-japanese-characters/8721)

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**Author:** [@aruno14](https://discourse.paraview.org/u/aruno14)\
**Replies:** 5\
**Last updated:** [April 13, 2022, 9:02pm UTC](https://discourse.paraview.org/t/call-pvbatch-exe-from-a-python-script-with-as-argument-a-file-path-containing-japanese-characters/8721 "2022-04-13T21:02:58Z")

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Hello, I want to call pvbatch.exe (on Windows) to create a VTU file, since I use a GUI, I don’t want to block during the process. So, I use the below code: args = \[PARAVIEW\_PATH, input\_file\_path\] print(args) self.parav…

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## [Half of ProcessIdScalars values are false for a vti file](https://discourse.paraview.org/t/half-of-processidscalars-values-are-false-for-a-vti-file/9367)

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**Author:** [@eve-le-guillou](https://discourse.paraview.org/u/eve-le-guillou)\
**Replies:** 0\
**Last updated:** [April 6, 2022, 8:49am UTC](https://discourse.paraview.org/t/half-of-processidscalars-values-are-false-for-a-vti-file/9367 "2022-04-06T08:49:43Z")

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Hi all, I have issues with using the ProcessIdScalars filter with the GhostCellsGenerator for a Uniform Rectilinear Grid. I first open this data (3.4 KB) that I produced in built in mode using the Wavelet and the Gener…

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## [Filter supposed to react to animation steps](https://discourse.paraview.org/t/filter-supposed-to-react-to-animation-steps/9333)

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**Author:** [@cobo](https://discourse.paraview.org/u/cobo)\
**Replies:** 5\
**Last updated:** [April 5, 2022, 9:02am UTC](https://discourse.paraview.org/t/filter-supposed-to-react-to-animation-steps/9333 "2022-04-05T09:02:34Z")

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Busy with writing custom plugins in C++, and currently dealing more with animations, and there I am having a little problem where probably somebody knows very quickly how to deal with it! Starting with a numbered CSV ta…

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## [Official Node Editor in ParaView ?](https://discourse.paraview.org/t/official-node-editor-in-paraview/6295)

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**Author:** [@Charles\_Gueunet](https://discourse.paraview.org/u/Charles_Gueunet)\
**Replies:** 13\
**Last updated:** [April 4, 2022, 7:35pm UTC](https://discourse.paraview.org/t/official-node-editor-in-paraview/6295 "2022-04-04T19:35:46Z")

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Hello everyone, The rise of Topological Data Analysis and In-Situ computation has led to more complex pipelines and the need for better tools to manipulate them. We are currently investigating how we could improve the …

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## [CFD Plugin](https://discourse.paraview.org/t/cfd-plugin/9322)

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**Author:** [@amin\_torabi](https://discourse.paraview.org/u/amin_torabi)\
**Replies:** 2\
**Last updated:** [April 1, 2022, 12:29pm UTC](https://discourse.paraview.org/t/cfd-plugin/9322 "2022-04-01T12:29:38Z")

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I am trying to add plugin name “FLSGRFReader”. The plugin is for reading some CFD files. How Can I install that

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## [paraview5.8 plugin to write polydata to a custom format is not generating wrapper](https://discourse.paraview.org/t/paraview5-8-plugin-to-write-polydata-to-a-custom-format-is-not-generating-wrapper/4774)

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**Author:** [@fissell](https://discourse.paraview.org/u/fissell)\
**Replies:** 3\
**Last updated:** [March 29, 2022, 1:28pm UTC](https://discourse.paraview.org/t/paraview5-8-plugin-to-write-polydata-to-a-custom-format-is-not-generating-wrapper/4774 "2022-03-29T13:28:45Z")

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Hi, I wrote reader/writer plugins for a custom file format that is PolyData when loaded in Paraview. They work fine in previous Paraview versions. My reader is vtkTypeMacro(vtkTrackVisReader,vtkPolyDataAlgorithm); a…

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## [Error in ParaView](https://discourse.paraview.org/t/error-in-paraview/9298)

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**Author:** [@cmccaslin](https://discourse.paraview.org/u/cmccaslin)\
**Replies:** 0\
**Last updated:** [March 28, 2022, 4:33pm UTC](https://discourse.paraview.org/t/error-in-paraview/9298 "2022-03-28T16:33:02Z")

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I am trying to visualize an XDMF file. It worked perfectly for me last week then out of nowhere I am getting the following errors: ERROR: In C:\\glr\\builds\\paraview\\paraview-ci\\build\\superbuild\\paraview\\src\\VTK\\IO\\Xdmf2\\…

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## [parallel reader](https://discourse.paraview.org/t/parallel-reader/9286)

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**Author:** [@fvitello](https://discourse.paraview.org/u/fvitello)\
**Replies:** 1\
**Last updated:** [March 28, 2022, 1:50pm UTC](https://discourse.paraview.org/t/parallel-reader/9286 "2022-03-28T13:50:01Z")

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Hi all, i want to parallelize my own reader (FITS file, vtkImageData) with MPI. Can you point me on how to implement parallelism? Now if I execute pvserver with mpi the data is reader and replicated for each process. T…

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## [How to make interactive clip plane widget is visible while hide properties panel](https://discourse.paraview.org/t/how-to-make-interactive-clip-plane-widget-is-visible-while-hide-properties-panel/9255)

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**Author:** [@sharon](https://discourse.paraview.org/u/sharon)\
**Replies:** 2\
**Last updated:** [March 26, 2022, 2:39am UTC](https://discourse.paraview.org/t/how-to-make-interactive-clip-plane-widget-is-visible-while-hide-properties-panel/9255 "2022-03-26T02:39:20Z")

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I found when i close properties panel, the interactive clip plane widget will hide, too. which is not what i expected. what i want is close properties panel, and make interactive clip plane widget visible, how to do it? …

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## [What is the correct workflow to develop custom interactive widget in ParaView](https://discourse.paraview.org/t/what-is-the-correct-workflow-to-develop-custom-interactive-widget-in-paraview/9189)

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**Author:** [@Cam](https://discourse.paraview.org/u/Cam)\
**Replies:** 8\
**Last updated:** [March 23, 2022, 8:31am UTC](https://discourse.paraview.org/t/what-is-the-correct-workflow-to-develop-custom-interactive-widget-in-paraview/9189 "2022-03-23T08:31:45Z")

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Dear ParaView community, I am still learning ParaView and I recently start to implement a custom 3D interactive widget. This is the workflow that I summarized (please correct me if I am wrong) Implement vtkMyCustomWid…

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## [How to create paraview qml application](https://discourse.paraview.org/t/how-to-create-paraview-qml-application/9257)

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**Author:** [@sharon](https://discourse.paraview.org/u/sharon)\
**Replies:** 0\
**Last updated:** [March 23, 2022, 12:05am UTC](https://discourse.paraview.org/t/how-to-create-paraview-qml-application/9257 "2022-03-23T00:05:58Z")

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paraview application is built by Qt Widget, when used on touch screen where there is no mouse, then middle button, right button is not usable, but multipoint touch is required how to do it? can we make a qml application…

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## [VTKPythonAlgorithmBase smproperty.stringvector callback modification action](https://discourse.paraview.org/t/vtkpythonalgorithmbase-smproperty-stringvector-callback-modification-action/9239)

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**Author:** [@lou75](https://discourse.paraview.org/u/lou75)\
**Replies:** 4\
**Last updated:** [March 21, 2022, 6:34pm UTC](https://discourse.paraview.org/t/vtkpythonalgorithmbase-smproperty-stringvector-callback-modification-action/9239 "2022-03-21T18:34:41Z")

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Hi, for a VTKPythonAlgorithmBase panel, is there a way to declare a callback function for an smproperty.stringvector upon a modification action ? thanks for help

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## [pqLoadDataReaction in custom application](https://discourse.paraview.org/t/pqloaddatareaction-in-custom-application/9230)

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**Author:** [@fvitello](https://discourse.paraview.org/u/fvitello)\
**Replies:** 5\
**Last updated:** [March 21, 2022, 1:50pm UTC](https://discourse.paraview.org/t/pqloaddatareaction-in-custom-application/9230 "2022-03-21T13:50:42Z")

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Hi all, i am trying to implement my first custom application based on paraview and I have defined a pqLoadDataReaction linked to a QAction. pqLoadDataReaction\* dataLoader = new pqLoadDataReaction(ui.actionOpen); When …

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## [How to access interactive plane parameters from pipeline source proxy](https://discourse.paraview.org/t/how-to-access-interactive-plane-parameters-from-pipeline-source-proxy/9233)

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**Author:** [@sharon](https://discourse.paraview.org/u/sharon)\
**Replies:** 0\
**Last updated:** [March 20, 2022, 1:59pm UTC](https://discourse.paraview.org/t/how-to-access-interactive-plane-parameters-from-pipeline-source-proxy/9233 "2022-03-20T13:59:14Z")

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Dear experts, I add a “ClipFunction” in my filter, and it show a interactive plane widget automatically, that’s great! Now i want to control the “Plane Parameters” programmatically, but i dont know how to access this p…

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## [Plugin Starting from an XDMFReader](https://discourse.paraview.org/t/plugin-starting-from-an-xdmfreader/9227)

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**Author:** [@Kostas\_Politis](https://discourse.paraview.org/u/Kostas_Politis)\
**Replies:** 1\
**Last updated:** [March 20, 2022, 1:00pm UTC](https://discourse.paraview.org/t/plugin-starting-from-an-xdmfreader/9227 "2022-03-20T13:00:13Z")

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Hello all, I’m writing a plugin using the base structure of the vtkXdmfReader.h/cxx + readers\_xdmf2.xml. I’ve just modified the files to expose different names to the SM xml and to modify the extension to myxdmf. Unfort…

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## [C++ VTK application and pvserver](https://discourse.paraview.org/t/c-vtk-application-and-pvserver/9169)

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**Author:** [@fvitello](https://discourse.paraview.org/u/fvitello)\
**Replies:** 4\
**Last updated:** [March 20, 2022, 11:51am UTC](https://discourse.paraview.org/t/c-vtk-application-and-pvserver/9169 "2022-03-20T11:51:35Z")

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Hello Everyone, is it possibile to connect an c++ vtk/qt application with pvserver in order to obtain a remote rendering? Thanks

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## [Reset Session programatically in python macro](https://discourse.paraview.org/t/reset-session-programatically-in-python-macro/9218)

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**Author:** [@Gianmarco](https://discourse.paraview.org/u/Gianmarco)\
**Replies:** 3\
**Last updated:** [March 18, 2022, 3:50pm UTC](https://discourse.paraview.org/t/reset-session-programatically-in-python-macro/9218 "2022-03-18T15:50:36Z")

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Hello, I’m running a macro with loops that use a lot of memory. What I’d like to do is to clean the memory between loops. However if I add a ResetSession() in the macro, Paraview crashes. I tried something like for …

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## [New Windows Defender download hurdles](https://discourse.paraview.org/t/new-windows-defender-download-hurdles/9196)

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**Author:** [@cobo](https://discourse.paraview.org/u/cobo)\
**Replies:** 6\
**Last updated:** [March 16, 2022, 5:38pm UTC](https://discourse.paraview.org/t/new-windows-defender-download-hurdles/9196 "2022-03-16T17:38:24Z")

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Not sure whether this problem belongs into the Development section, but it definitely affects developers trying to present ParaView custom applications for download (after wrapping them with a “superbuild”). Once the us…

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## [Output contour of a certain area](https://discourse.paraview.org/t/output-contour-of-a-certain-area/9183)

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**Author:** [@xq520](https://discourse.paraview.org/u/xq520)\
**Replies:** 7\
**Last updated:** [March 15, 2022, 4:32pm UTC](https://discourse.paraview.org/t/output-contour-of-a-certain-area/9183 "2022-03-15T16:32:02Z")

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Hello, I want to output contour in a certain region, such as (-1,1)(-1,1), and the whole region is (-10,10)(-10,10). How can I get this? Thanks a lot. Best regards

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## [How to clip Volume and keep rgba 4 scalar components](https://discourse.paraview.org/t/how-to-clip-volume-and-keep-rgba-4-scalar-components/9167)

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**Author:** [@sharon](https://discourse.paraview.org/u/sharon)\
**Replies:** 0\
**Last updated:** [March 12, 2022, 9:56am UTC](https://discourse.paraview.org/t/how-to-clip-volume-and-keep-rgba-4-scalar-components/9167 "2022-03-12T09:56:59Z")

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Dear Experts, I want to clip my volume data which has 4 scalar components: rgba, my expected result is a portion of origin: the same color and opacity, but the real result is a solid entity which lost origin rgba infor…

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## [Proposal: PBR Material Editor](https://discourse.paraview.org/t/proposal-pbr-material-editor/6952)

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**Author:** [@Thomas\_Caissard](https://discourse.paraview.org/u/Thomas_Caissard)\
**Replies:** 8\
**Last updated:** [March 9, 2022, 8:16am UTC](https://discourse.paraview.org/t/proposal-pbr-material-editor/6952 "2022-03-09T08:16:46Z")

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Dear paraview community, we are currently developping at kitware europe a new paraview feature which adds an interface to edit OSPRay materials within the paraview GUI. It will: allows you to load a existing material …

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## [How to automate the creation of multiple vtkSMProxy](https://discourse.paraview.org/t/how-to-automate-the-creation-of-multiple-vtksmproxy/9122)

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**Author:** [@Cam](https://discourse.paraview.org/u/Cam)\
**Replies:** 8\
**Last updated:** [March 9, 2022, 5:58am UTC](https://discourse.paraview.org/t/how-to-automate-the-creation-of-multiple-vtksmproxy/9122 "2022-03-09T05:58:24Z")

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For example, I want to create 100 spheres with different center locations. What is the best way to do this in c++. Thanks Cam

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## [how to enable hdf5cpp in superbuild?](https://discourse.paraview.org/t/how-to-enable-hdf5cpp-in-superbuild/9025)

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**Author:** [@Fabian](https://discourse.paraview.org/u/Fabian)\
**Replies:** 4\
**Last updated:** [March 3, 2022, 10:52pm UTC](https://discourse.paraview.org/t/how-to-enable-hdf5cpp-in-superbuild/9025 "2022-03-03T22:52:39Z")

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For my plugin I need hdf5cpp. In hdf5.cmake are the lines ... DEPENDS\_OPTIONAL hdf5cpp ... -DHDF5\_BUILD\_CPP\_LIB:BOOL=${hdf5cpp\_enabled} How can I enable hdf5cpp? Thanks

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## [Particle checkpoint format in AMReX 22.03 not yet supported?](https://discourse.paraview.org/t/particle-checkpoint-format-in-amrex-22-03-not-yet-supported/9104)

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**Author:** [@n8xm](https://discourse.paraview.org/u/n8xm)\
**Replies:** 1\
**Last updated:** [March 3, 2022, 4:00pm UTC](https://discourse.paraview.org/t/particle-checkpoint-format-in-amrex-22-03-not-yet-supported/9104 "2022-03-03T16:00:12Z")

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The AMRex 22.03 release introduces an updated particle checkpoint format, which was merged as part of AMReX PR #2624. This changes the version string from "Version\_Two\_Dot\_Zero" to "Version\_Two\_Dot\_One" in AMReX\_Particle…

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## [Background vs Path Traced Environment](https://discourse.paraview.org/t/background-vs-path-traced-environment/7402)

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**Author:** [@utkarsh.ayachit](https://discourse.paraview.org/u/utkarsh.ayachit)\
**Replies:** 8\
**Last updated:** [March 2, 2022, 8:08am UTC](https://discourse.paraview.org/t/background-vs-path-traced-environment/7402 "2022-03-02T08:08:01Z")

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In ParaView 5.9, when ray tracing is enabled, we are present with group called Path Traced Environment. From what I see, it’s largely same as the Background and does indeed override whatever is set in the Background. In…

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## [Regarding use of pqPointPickingHelper](https://discourse.paraview.org/t/regarding-use-of-pqpointpickinghelper/9064)

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**Author:** [@Cam](https://discourse.paraview.org/u/Cam)\
**Replies:** 1\
**Last updated:** [February 25, 2022, 8:59am UTC](https://discourse.paraview.org/t/regarding-use-of-pqpointpickinghelper/9064 "2022-02-25T08:59:13Z")

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I recently looked into the pqPointPickingHelper and have a question about the memory management. In pqSplinePropertyWidget.cxx, multiple pqPointPickingHelper objects are allocated using new from line 345 to 373. But I d…

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## [Miscoloring of small grid meshes](https://discourse.paraview.org/t/miscoloring-of-small-grid-meshes/9038)

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**Author:** [@eisenlohr](https://discourse.paraview.org/u/eisenlohr)\
**Replies:** 8\
**Last updated:** [February 24, 2022, 11:26pm UTC](https://discourse.paraview.org/t/miscoloring-of-small-grid-meshes/9038 "2022-02-24T23:26:48Z")

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As shown in the below screen recording, the rendering of small-sized (here edge length of 0.3e-6) grids is buggy. This erratic behavior does not happen for meshes larger than about 0.5e-6… If the mesh gets even smaller,…

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## [vtkPythonAlgorithm dynamic UI](https://discourse.paraview.org/t/vtkpythonalgorithm-dynamic-ui/9011)

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**Author:** [@lou75](https://discourse.paraview.org/u/lou75)\
**Replies:** 4\
**Last updated:** [February 21, 2022, 11:54am UTC](https://discourse.paraview.org/t/vtkpythonalgorithm-dynamic-ui/9011 "2022-02-21T11:54:21Z")

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Hello, is it possible to creat a dynamic UI with the vtkPythonAlgorithm filter model ? example, having in my python plugin UI multiple “range value slider”, their number depending on the loaded data. Thanks for help ! …

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