# Development **URL:** https://discourse.paraview.org/c/development/6.md?no_subcategories=false&page=15 [Latest](https://discourse.paraview.org/latest.md) · [Categories](https://discourse.paraview.org/categories.md) · [Tags](https://discourse.paraview.org/tags.md) **Page:** 16 --- ## [non blocking filters that make web api calls](https://discourse.paraview.org/t/non-blocking-filters-that-make-web-api-calls/10702)
**Author:** [@Saswata\_Chakravarty](https://discourse.paraview.org/u/Saswata_Chakravarty)\ **Replies:** 0\ **Last updated:** [November 9, 2022, 8:12am UTC](https://discourse.paraview.org/t/non-blocking-filters-that-make-web-api-calls/10702 "2022-11-09T08:12:58Z")
Hi Team I am making a custom filter in python that makes multiple web api calls. Overall the results take some 5-15 minutes to complete. Is there a way to make the functions in the filter non-blocking? I notice that wh… --- ## [Name configuration for reader pipeline source](https://discourse.paraview.org/t/name-configuration-for-reader-pipeline-source/10541)
**Author:** [@nicolas.vuaille](https://discourse.paraview.org/u/nicolas.vuaille)\ **Replies:** 4\ **Last updated:** [November 8, 2022, 11:34am UTC](https://discourse.paraview.org/t/name-configuration-for-reader-pipeline-source/10541 "2022-11-08T11:34:04Z")
Hi community, When loading a file, the pipeline source created is named according to the file, including extensions. This is not always the best choice: this may be a generic name given by the solver, whereas the … --- ## [Cannot create Programmable Source using MPI](https://discourse.paraview.org/t/cannot-create-programmable-source-using-mpi/10653)
**Author:** [@lowered\_priora](https://discourse.paraview.org/u/lowered_priora)\ **Replies:** 3\ **Last updated:** [November 7, 2022, 8:21am UTC](https://discourse.paraview.org/t/cannot-create-programmable-source-using-mpi/10653 "2022-11-07T08:21:56Z")
Hello everyone! I use Paraview 5.10.1 with MPI on Windows Client and Linux Server. I have a problem regarding MPI. My goal is to have a Python module that will be placed both on client and server machine. Python command… --- ## [About warning when going out of memory](https://discourse.paraview.org/t/about-warning-when-going-out-of-memory/10497)
**Author:** [@mwestphal](https://discourse.paraview.org/u/mwestphal)\ **Replies:** 7\ **Last updated:** [November 2, 2022, 5:55am UTC](https://discourse.paraview.org/t/about-warning-when-going-out-of-memory/10497 "2022-11-02T05:55:20Z")
Im trying to find a acceptable way to warn a user that adding a filter may cause his server node to go out of memory. Of course, it is out of the question to try to precompute the memory usage before pressing Apply, but… --- ## [Properties, property groups and dependencies](https://discourse.paraview.org/t/properties-property-groups-and-dependencies/10639)
**Author:** [@cobo](https://discourse.paraview.org/u/cobo)\ **Replies:** 3\ **Last updated:** [October 31, 2022, 2:29pm UTC](https://discourse.paraview.org/t/properties-property-groups-and-dependencies/10639 "2022-10-31T14:29:49Z")
For a filter, I need the following input properties: Value1, a value name from a list of strings - “\” by default Min1, Max1 and Steps1, for some loop. Requirements and dependencies: a) Min1, Max1 and Steps1 sho… --- ## [Issue with mpich in ParaView 5.11.0-RC1](https://discourse.paraview.org/t/issue-with-mpich-in-paraview-5-11-0-rc1/10369)
**Author:** [@joeh](https://discourse.paraview.org/u/joeh)\ **Replies:** 4\ **Last updated:** [October 30, 2022, 3:54pm UTC](https://discourse.paraview.org/t/issue-with-mpich-in-paraview-5-11-0-rc1/10369 "2022-10-30T15:54:10Z")
Hello, I have been testing paraview 5.11.0-RC1 under linux, building it with the superbuild. I have found that when building it with the internal MPI mpich version that while mpich is built correctly, it is not proper… --- ## [Array dispatch issues](https://discourse.paraview.org/t/array-dispatch-issues/10328)
**Author:** [@Andy\_Bauer](https://discourse.paraview.org/u/Andy_Bauer)\ **Replies:** 17\ **Last updated:** [October 30, 2022, 3:46pm UTC](https://discourse.paraview.org/t/array-dispatch-issues/10328 "2022-10-30T15:46:09Z")
It looks like the array dispatch for SOA arrays with number of components\>1 isn’t working. I’ve built ParaView with VTK\_DISPATCH\_SOA\_ARRAYS enabled (I also tried to build with VTK\_DISPATCH\_TYPED\_ARRAYS enabled but had bu… --- ## [Paraview crashes when opening .vtk file](https://discourse.paraview.org/t/paraview-crashes-when-opening-vtk-file/10631)
**Author:** [@John007](https://discourse.paraview.org/u/John007)\ **Replies:** 0\ **Last updated:** [October 29, 2022, 8:14pm UTC](https://discourse.paraview.org/t/paraview-crashes-when-opening-vtk-file/10631 "2022-10-29T20:14:51Z")
I cannot open paraview. I don’t know what went wrong. Could you please help me find the error. --- ## [Trying to use the vtkInformation/vtkInformationKey system for own purposes](https://discourse.paraview.org/t/trying-to-use-the-vtkinformation-vtkinformationkey-system-for-own-purposes/10568)
**Author:** [@cobo](https://discourse.paraview.org/u/cobo)\ **Replies:** 2\ **Last updated:** [October 24, 2022, 7:48am UTC](https://discourse.paraview.org/t/trying-to-use-the-vtkinformation-vtkinformationkey-system-for-own-purposes/10568 "2022-10-24T07:48:09Z")
VTK/Paraview comes with a pretty nice information exchange system, based on the vtkInformation and vtkInformationKey classes. In my own custom application, I would like to make use of it - if possible! -, instead of re-… --- ## [Paring Paraview with Datashader](https://discourse.paraview.org/t/paring-paraview-with-datashader/10567)
**Author:** [@Connor\_McClellan](https://discourse.paraview.org/u/Connor_McClellan)\ **Replies:** 1\ **Last updated:** [October 24, 2022, 2:44am UTC](https://discourse.paraview.org/t/paring-paraview-with-datashader/10567 "2022-10-24T02:44:12Z")
Hi all, I’m trying to visualize large datasets (~1 billion points) on my local desktop and have been using ParaView up to 30M points (~100M cells) for 3D data. I’m thinking I can then use Datashader to view very large 2D… --- ## [Maximum number of labels -- escalate to top management](https://discourse.paraview.org/t/maximum-number-of-labels-escalate-to-top-management/10579)
**Author:** [@nadeem](https://discourse.paraview.org/u/nadeem)\ **Replies:** 1\ **Last updated:** [October 24, 2022, 2:20am UTC](https://discourse.paraview.org/t/maximum-number-of-labels-escalate-to-top-management/10579 "2022-10-24T02:20:48Z")
My request of help on the topic (below) has no replies, so I assume that this is a very difficult problem requiring top expert help. The topic I posted was: Maximum number of labels – for Lagrangian particle tracking I … --- ## [LS-DYNA D3PLOT reader enhancement](https://discourse.paraview.org/t/ls-dyna-d3plot-reader-enhancement/10503)
**Author:** [@icebreakersours](https://discourse.paraview.org/u/icebreakersours)\ **Replies:** 1\ **Last updated:** [October 13, 2022, 11:40pm UTC](https://discourse.paraview.org/t/ls-dyna-d3plot-reader-enhancement/10503 "2022-10-13T23:40:37Z")
Dear ParaView developers, Is there a way for users to look up source code for the LS-DYNA D3PLOT reader and enhance it? If not, what is the next best option? Thanks! Vikas --- ## [vtkSIProxy doesn't find my custom widget representation.](https://discourse.paraview.org/t/vtksiproxy-doesnt-find-my-custom-widget-representation/10407)
**Author:** [@Cam](https://discourse.paraview.org/u/Cam)\ **Replies:** 4\ **Last updated:** [September 27, 2022, 6:32pm UTC](https://discourse.paraview.org/t/vtksiproxy-doesnt-find-my-custom-widget-representation/10407 "2022-09-27T18:32:27Z")
I am developing a custom widget using widget/representation design pattern inside a ParaView plugin. I have representation, widget, and xml which exposes them to the server. But I still got \[paraview \] v… --- ## [Implement dialog for Export Animated Scene in ParaView](https://discourse.paraview.org/t/implement-dialog-for-export-animated-scene-in-paraview/10227)
**Author:** [@David\_Berger](https://discourse.paraview.org/u/David_Berger)\ **Replies:** 6\ **Last updated:** [September 26, 2022, 8:09am UTC](https://discourse.paraview.org/t/implement-dialog-for-export-animated-scene-in-paraview/10227 "2022-09-26T08:09:20Z")
I was tasked to implement an additional dialog when exporting an Animated Scene (with File \> Export Animated Scene...) kind of like the one we see when using the Export Scene feature. In the case of exporting a .vtkjs an… --- ## [stream tracer using cell centred vector field](https://discourse.paraview.org/t/stream-tracer-using-cell-centred-vector-field/10365)
**Author:** [@Omar\_Elsayed](https://discourse.paraview.org/u/Omar_Elsayed)\ **Replies:** 2\ **Last updated:** [September 21, 2022, 12:58pm UTC](https://discourse.paraview.org/t/stream-tracer-using-cell-centred-vector-field/10365 "2022-09-21T12:58:14Z")
Paraview supports a filter called “stream tracer with custom source” which does not exist in VTK, as far as I have searched. Interestingly, the filter differs from the simple streamTracer in that it does not work with ce… --- ## [PV master build issues with dispatched typed arrays](https://discourse.paraview.org/t/pv-master-build-issues-with-dispatched-typed-arrays/10321)
**Author:** [@Andy\_Bauer](https://discourse.paraview.org/u/Andy_Bauer)\ **Replies:** 0\ **Last updated:** [September 14, 2022, 9:31pm UTC](https://discourse.paraview.org/t/pv-master-build-issues-with-dispatched-typed-arrays/10321 "2022-09-14T21:31:03Z")
I’m trying to build ParaView master and when I have the following CMake flags set I get the build errors listed below: VTK\_DISPATCH\_SOA\_ARRAYS ON VTK\_DISPATCH\_TYPED\_ARRAYS ON Build errors: \[1/7\] Link… --- ## [Paraview 5.11.0-RC1 Python Script](https://discourse.paraview.org/t/paraview-5-11-0-rc1-python-script/10303)
**Author:** [@Nikita\_Oshchepkov](https://discourse.paraview.org/u/Nikita_Oshchepkov)\ **Replies:** 1\ **Last updated:** [September 13, 2022, 5:04pm UTC](https://discourse.paraview.org/t/paraview-5-11-0-rc1-python-script/10303 "2022-09-13T17:04:12Z")
Hello. I’m writing my own script to convert .vtk files to .gltf, but while converting I get a lot of .bin files. How Can I avoid this? ExportView(“result.gltf”,view = renderView,Compressoutputfile=1) Compressoutputfile… --- ## [ParaView/VTK LLDB pretty printers](https://discourse.paraview.org/t/paraview-vtk-lldb-pretty-printers/10096)
**Author:** [@Artem\_Bodrin](https://discourse.paraview.org/u/Artem_Bodrin)\ **Replies:** 1\ **Last updated:** [September 7, 2022, 9:13pm UTC](https://discourse.paraview.org/t/paraview-vtk-lldb-pretty-printers/10096 "2022-09-07T21:13:00Z")
It would be nice if anyone share them, if they exist, of course :slight\_smile: --- ## [native vtkProcessXML for cross-compilation ?](https://discourse.paraview.org/t/native-vtkprocessxml-for-cross-compilation/9810)
**Author:** [@jschueller](https://discourse.paraview.org/u/jschueller)\ **Replies:** 1\ **Last updated:** [September 7, 2022, 8:54pm UTC](https://discourse.paraview.org/t/native-vtkprocessxml-for-cross-compilation/9810 "2022-09-07T20:54:51Z")
in cross-compilation mode we need a native version of the vtkProcessXML executable that is part of paraview when no emulator is available I dont seem to find a paraview equivalent of VTK\_BUILD\_COMPILE\_TOOLS\_ONLY though,… --- ## [Visualize the terrain](https://discourse.paraview.org/t/visualize-the-terrain/10244)
**Author:** [@Pravin\_Poudel](https://discourse.paraview.org/u/Pravin_Poudel)\ **Replies:** 1\ **Last updated:** [September 5, 2022, 3:17am UTC](https://discourse.paraview.org/t/visualize-the-terrain/10244 "2022-09-05T03:17:42Z")
Hi I am new to paraview and ttk. I want to analyze the terrain but i am not able to figureout how to start with it. I have elevation map data in json file in one dimension array representing height of mesh. My first di… --- ## [UI Widget Overhaul](https://discourse.paraview.org/t/ui-widget-overhaul/10120)
**Author:** [@Jonas.Lukasczyk](https://discourse.paraview.org/u/Jonas.Lukasczyk)\ **Replies:** 23\ **Last updated:** [September 5, 2022, 2:51am UTC](https://discourse.paraview.org/t/ui-widget-overhaul/10120 "2022-09-05T02:51:24Z")
Hi everyone, the PV user interface could make better use of the available screen estate. In contrast to Blender, I always have the feeling there is not enough space in the PV interface. For example, a range widget uses … --- ## [Image Spacing Bug: Spacing is not match with input nrrd file](https://discourse.paraview.org/t/image-spacing-bug-spacing-is-not-match-with-input-nrrd-file/10248)
**Author:** [@sharon](https://discourse.paraview.org/u/sharon)\ **Replies:** 0\ **Last updated:** [September 4, 2022, 9:08am UTC](https://discourse.paraview.org/t/image-spacing-bug-spacing-is-not-match-with-input-nrrd-file/10248 "2022-09-04T09:08:19Z")
Dear Experts, From input file the spacing is: space directions: (0.98705792427062977,0,0) (0,0.98727250099182129,0) (0,0,1) but after read input paraview, this spacing is: (1.0, 1.0, 1.0) which can be confirmed by inf… --- ## [How does Paraview recieves data for plotting?](https://discourse.paraview.org/t/how-does-paraview-recieves-data-for-plotting/10230)
**Author:** [@Melissa\_Freitas](https://discourse.paraview.org/u/Melissa_Freitas)\ **Replies:** 3\ **Last updated:** [September 2, 2022, 3:16am UTC](https://discourse.paraview.org/t/how-does-paraview-recieves-data-for-plotting/10230 "2022-09-02T03:16:28Z")
I have a dataset on astrophysics containing density values in a 3D array, and I’d like to plot these in paraview. The data is originally in spherical coordinates, and before uploading them into paraview they were transfo… --- ## [Inclusion of patented video codecs in ParaView/VTK](https://discourse.paraview.org/t/inclusion-of-patented-video-codecs-in-paraview-vtk/10189)
**Author:** [@jaswantp](https://discourse.paraview.org/u/jaswantp)\ **Replies:** 5\ **Last updated:** [August 29, 2022, 1:25pm UTC](https://discourse.paraview.org/t/inclusion-of-patented-video-codecs-in-paraview-vtk/10189 "2022-08-29T13:25:44Z")
I’m putting this out here for us to learn how an open source project would go about using patented video codecs (h.264/h.265) to generate video files in a patent-protected non-free container format like mp4 live strea… --- ## [pvpython fails to execute vtkpython (Debian package unusable)](https://discourse.paraview.org/t/pvpython-fails-to-execute-vtkpython-debian-package-unusable/10144)
**Author:** [@slayoo](https://discourse.paraview.org/u/slayoo)\ **Replies:** 1\ **Last updated:** [August 29, 2022, 5:05am UTC](https://discourse.paraview.org/t/pvpython-fails-to-execute-vtkpython-debian-package-unusable/10144 "2022-08-29T05:05:18Z")
Hello, As reported some time ago here: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1010027 Debian/Ubuntu python3-paraview package is not usable anyore. The symptom is that pvpython does not read from the file wh… --- ## [New plane widget with adaptive size](https://discourse.paraview.org/t/new-plane-widget-with-adaptive-size/9107)
**Author:** [@spyridon97](https://discourse.paraview.org/u/spyridon97)\ **Replies:** 30\ **Last updated:** [August 19, 2022, 10:41pm UTC](https://discourse.paraview.org/t/new-plane-widget-with-adaptive-size/9107 "2022-08-19T22:41:20Z")
Hello everyone, I want to introduce you to the new plane widget. The new plane widget has been available on ParaView-master since December 15th, 2021, and it can potentially replace the old one in ParaView 5.11. Be sure … --- ## [PRISM capability proposal](https://discourse.paraview.org/t/prism-capability-proposal/9641)
**Author:** [@dhr](https://discourse.paraview.org/u/dhr)\ **Replies:** 4\ **Last updated:** [August 9, 2022, 8:06pm UTC](https://discourse.paraview.org/t/prism-capability-proposal/9641 "2022-08-09T20:06:27Z")
Prism components in ParaView Overview The basis of the original Prism application was two linked views that helped scientists view simulation data and equation of state (EOS)\[1\] data interactively in the same applicat… --- ## [GenerateCompositeDataSetFromHierarchy in Python](https://discourse.paraview.org/t/generatecompositedatasetfromhierarchy-in-python/10110)
**Author:** [@HollowSun0](https://discourse.paraview.org/u/HollowSun0)\ **Replies:** 0\ **Last updated:** [August 5, 2022, 10:43pm UTC](https://discourse.paraview.org/t/generatecompositedatasetfromhierarchy-in-python/10110 "2022-08-05T22:43:05Z")
Hi everyone! Quick question… How does one call the method… output = vtkDataAssemblyUtilities.GenerateCompositeDataSetFromHierarchy( outPDSC, outPDSC.GetDataAssembly()) ? I keep getting this error: ValueError:… --- ## [Colorbar font size bug?](https://discourse.paraview.org/t/colorbar-font-size-bug/1005)
**Author:** [@RED](https://discourse.paraview.org/u/RED)\ **Replies:** 9\ **Last updated:** [July 27, 2022, 10:07am UTC](https://discourse.paraview.org/t/colorbar-font-size-bug/1005 "2022-07-27T10:07:14Z")
Hi. When saving a screenshot with resolution than that of the default one the size of fonts in the colormap are scaled awkwardly, i.e. they appear in the saved image much larger than in the rendering window. The same d… --- ## [vtkLegendScaleActor](https://discourse.paraview.org/t/vtklegendscaleactor/9942)
**Author:** [@fvitello](https://discourse.paraview.org/u/fvitello)\ **Replies:** 3\ **Last updated:** [July 8, 2022, 10:46pm UTC](https://discourse.paraview.org/t/vtklegendscaleactor/9942 "2022-07-08T22:46:59Z")
Dear All, I would like to add a vtkLegendScaleActor to my paraview custom application render view, any suggestion on how to do it? EDIT: I have added with the following code auto legendActorCube = vtkSmartPointer\