# ParaView Support

**URL:** https://discourse.paraview.org/c/paraview-support/7.md?page=152

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**Page:** 153

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## [Merging simulation data from vtk and vtu files](https://discourse.paraview.org/t/merging-simulation-data-from-vtk-and-vtu-files/6474)

<div class="topic-metadata">

**Author:** [@peterl](https://discourse.paraview.org/u/peterl)\
**Replies:** 5\
**Last updated:** [February 17, 2021, 2:01pm UTC](https://discourse.paraview.org/t/merging-simulation-data-from-vtk-and-vtu-files/6474 "2021-02-17T14:01:18Z")

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I would like to merge two simulation data sets, one based on a structured and one on an unstructured mesh together and validate my model against another one by computing absolute value differences of certain quantities. …

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## [Legend border for Line Chart View in Pvpython](https://discourse.paraview.org/t/legend-border-for-line-chart-view-in-pvpython/6431)

<div class="topic-metadata">

**Author:** [@roujuntoh](https://discourse.paraview.org/u/roujuntoh)\
**Replies:** 4\
**Last updated:** [February 17, 2021, 9:51am UTC](https://discourse.paraview.org/t/legend-border-for-line-chart-view-in-pvpython/6431 "2021-02-17T09:51:26Z")

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Hi team Does anyone know if it’s possible to do the following via pypython in the Python Shell panel? I had a look but there are no likely GUI options or object properties that would allow this, or any comment in the Pa…

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## [vtkIcetCompositePass with python](https://discourse.paraview.org/t/vtkicetcompositepass-with-python/6478)

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**Author:** [@hari](https://discourse.paraview.org/u/hari)\
**Replies:** 0\
**Last updated:** [February 17, 2021, 12:52am UTC](https://discourse.paraview.org/t/vtkicetcompositepass-with-python/6478 "2021-02-17T00:52:38Z")

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Hi All, I am quite new to paraview/vtk. Sorry if this question is too trivial. I am trying to do a parallel volume rendering using vtkicetcompositepass. However, I am facing issues with import necessary modules from pa…

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## [How can I run ParaView Python scripts on macOS?](https://discourse.paraview.org/t/how-can-i-run-paraview-python-scripts-on-macos/6475)

<div class="topic-metadata">

**Author:** [@jclai](https://discourse.paraview.org/u/jclai)\
**Replies:** 1\
**Last updated:** [February 16, 2021, 7:50pm UTC](https://discourse.paraview.org/t/how-can-i-run-paraview-python-scripts-on-macos/6475 "2021-02-16T19:50:02Z")

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Hello, I am trying to run a ParaView Python script from my macOS terminal using this command /Applications/ParaView-5.9.0.app/Contents/bin/pvpython /Users/joycelai/Documents/PythonScripts/paraview-2-16-2021.py and I g…

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## [2D Surface Airfoil NACA0012](https://discourse.paraview.org/t/2d-surface-airfoil-naca0012/6462)

<div class="topic-metadata">

**Author:** [@disco\_brocc](https://discourse.paraview.org/u/disco_brocc)\
**Replies:** 2\
**Last updated:** [February 16, 2021, 4:54pm UTC](https://discourse.paraview.org/t/2d-surface-airfoil-naca0012/6462 "2021-02-16T16:54:40Z")

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Hi everyone, I am using ParaView for a simple 2D NACA0012 project. I am trying to analyze the coefficient of lift and drag. But for that, I need the surface. I found some useful steps: https://discourse.paraview.org/t/h…

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## [Problem with offscreen rendering with 5.9](https://discourse.paraview.org/t/problem-with-offscreen-rendering-with-5-9/6310)

<div class="topic-metadata">

**Author:** [@Andy\_Bauer](https://discourse.paraview.org/u/Andy_Bauer)\
**Replies:** 9\
**Last updated:** [February 16, 2021, 1:05pm UTC](https://discourse.paraview.org/t/problem-with-offscreen-rendering-with-5-9/6310 "2021-02-16T13:05:11Z")

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Hi, I’m testing out the 5.9 installers on an HPC system (without graphics cards and therefore without X11) and I’m submitting a job to run pvbatch and am getting behavior that’s confusing me. I’ve been trying different …

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## [New platform linking/cmake issues](https://discourse.paraview.org/t/new-platform-linking-cmake-issues/6464)

<div class="topic-metadata">

**Author:** [@bitminer](https://discourse.paraview.org/u/bitminer)\
**Replies:** 5\
**Last updated:** [February 16, 2021, 12:50pm UTC](https://discourse.paraview.org/t/new-platform-linking-cmake-issues/6464 "2021-02-16T12:50:04Z")

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I’m trying to get ParaView running on OpenBSD (64-bit, AMD/x86 CPU) I’ve succeeded to get a build and install done as per OpenBSD typical ports process. The issue is: python site-packages/paraview/modules and site-pack…

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## [PARAVIEW SLICE shows only outer surface of particles.](https://discourse.paraview.org/t/paraview-slice-shows-only-outer-surface-of-particles/6450)

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**Author:** [@Kozha\_Akhmet\_Nugyman](https://discourse.paraview.org/u/Kozha_Akhmet_Nugyman)\
**Replies:** 1\
**Last updated:** [February 16, 2021, 10:28am UTC](https://discourse.paraview.org/t/paraview-slice-shows-only-outer-surface-of-particles/6450 "2021-02-16T10:28:33Z")

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Hello, everyone I am analyzing the voidage between particles. The slice view shows only the outer shell of the particles. I tried to change the solid color, but it changes the outer surface color of the particles. How c…

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## [Build error PV5.9 with OpenVR](https://discourse.paraview.org/t/build-error-pv5-9-with-openvr/6465)

<div class="topic-metadata">

**Author:** [@lyz](https://discourse.paraview.org/u/lyz)\
**Replies:** 3\
**Last updated:** [February 15, 2021, 11:42pm UTC](https://discourse.paraview.org/t/build-error-pv5-9-with-openvr/6465 "2021-02-15T23:42:35Z")

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I build PV5.9 with OpenVR(1.14.15) on windows 10 using vs2017(x64), however I got error like this:

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## [Undefined references to \`CamAdaptor\` when building \`libvtkPVAdaptorsCam\`](https://discourse.paraview.org/t/undefined-references-to-camadaptor-when-building-libvtkpvadaptorscam/6460)

<div class="topic-metadata">

**Author:** [@badshah400](https://discourse.paraview.org/u/badshah400)\
**Replies:** 2\
**Last updated:** [February 15, 2021, 5:35pm UTC](https://discourse.paraview.org/t/undefined-references-to-camadaptor-when-building-libvtkpvadaptorscam/6460 "2021-02-15T17:35:31Z")

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When building libvtkPVAdaptorsCam, multiple undefined references to CamAdaptor causes the build to fail. This is when building packages for openSUSE, where the default linker flags include -Wl,--as-needed -Wl,--no-undefi…

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## [Placing slice filters ALONG a pipe](https://discourse.paraview.org/t/placing-slice-filters-along-a-pipe/6454)

<div class="topic-metadata">

**Author:** [@epaj95](https://discourse.paraview.org/u/epaj95)\
**Replies:** 1\
**Last updated:** [February 14, 2021, 5:11pm UTC](https://discourse.paraview.org/t/placing-slice-filters-along-a-pipe/6454 "2021-02-14T17:11:36Z")

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Hello. I am trying to create multiple slices along tube-like geometries. If I use the standard slice filter, the plane cuts across the entire domain like this: This results in two slices. I don’t want this: Inste…

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## [Animation with transparent background](https://discourse.paraview.org/t/animation-with-transparent-background/6456)

<div class="topic-metadata">

**Author:** [@NicolaM](https://discourse.paraview.org/u/NicolaM)\
**Replies:** 1\
**Last updated:** [February 13, 2021, 2:38pm UTC](https://discourse.paraview.org/t/animation-with-transparent-background/6456 "2021-02-13T14:38:51Z")

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Hi all, I need to export an animation as a series of .png files with “Save Animation”, but… …is it possible to set a transparent background? I can’t find the setting Thanks a lot.

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## [Issues with superbuild with 5.9](https://discourse.paraview.org/t/issues-with-superbuild-with-5-9/6363)

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**Author:** [@Andy\_Bauer](https://discourse.paraview.org/u/Andy_Bauer)\
**Replies:** 7\
**Last updated:** [February 12, 2021, 6:40pm UTC](https://discourse.paraview.org/t/issues-with-superbuild-with-5-9/6363 "2021-02-12T18:40:21Z")

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Hi, I’m trying to build ParaView 5.9 with the superbuild with a pretty standard build (OSMesa, Python, MPI and not much else right now) and I’m getting the following error when it gets to building ParaView: Could not …

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## [Color Particles by Related Dataset](https://discourse.paraview.org/t/color-particles-by-related-dataset/6453)

<div class="topic-metadata">

**Author:** [@WEsToMIL](https://discourse.paraview.org/u/WEsToMIL)\
**Replies:** 0\
**Last updated:** [February 12, 2021, 6:30pm UTC](https://discourse.paraview.org/t/color-particles-by-related-dataset/6453 "2021-02-12T18:30:23Z")

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Hi I have two data sets. The first consists of point data where each point also has an attribute called “region”. Basically, it looks like this: id points region 0 1 1 1 0 1 2 2 2 0 2 3 3 3 1 3 4 4 4 1 …

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## [Copy Screenshot to Clipboard in Python](https://discourse.paraview.org/t/copy-screenshot-to-clipboard-in-python/6430)

<div class="topic-metadata">

**Author:** [@theodorebaltis](https://discourse.paraview.org/u/theodorebaltis)\
**Replies:** 3\
**Last updated:** [February 11, 2021, 11:54pm UTC](https://discourse.paraview.org/t/copy-screenshot-to-clipboard-in-python/6430 "2021-02-11T23:54:37Z")

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Ideally there would be an equivalent to SaveScreenshot in paraview.simple but I’m hoping there’s at least something already implemented even if not that… simple. If not: I can probably make a function using the existin…

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## [Image Source File-System](https://discourse.paraview.org/t/image-source-file-system/6448)

<div class="topic-metadata">

**Author:** [@theodorebaltis](https://discourse.paraview.org/u/theodorebaltis)\
**Replies:** 0\
**Last updated:** [February 11, 2021, 6:27pm UTC](https://discourse.paraview.org/t/image-source-file-system/6448 "2021-02-11T18:27:39Z")

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Starting a new topic to focus discussion a the point made in another topic by @mconti : Regardless of the file-system to which state files are saved, I strongly agree that when in client/server mode all data (specific…

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## [Proposed General Rule for Save and Load Supported Files on Remote and/or Local Filesystems](https://discourse.paraview.org/t/proposed-general-rule-for-save-and-load-supported-files-on-remote-and-or-local-filesystems/5398)

<div class="topic-metadata">

**Author:** [@patchett2002](https://discourse.paraview.org/u/patchett2002)\
**Replies:** 25\
**Last updated:** [February 11, 2021, 5:47pm UTC](https://discourse.paraview.org/t/proposed-general-rule-for-save-and-load-supported-files-on-remote-and-or-local-filesystems/5398 "2021-02-11T17:47:52Z")

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Proposed General Rule for Save and Load of Supported Files on Remote and/or Local Filesystems using the ParaView GUI Files that are generally considered small: images(png, jpg, etc…), Scripts (pvsm, py, catalyst, cine…

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## [Eroding surfaces](https://discourse.paraview.org/t/eroding-surfaces/6443)

<div class="topic-metadata">

**Author:** [@jdesman1](https://discourse.paraview.org/u/jdesman1)\
**Replies:** 0\
**Last updated:** [February 11, 2021, 3:04pm UTC](https://discourse.paraview.org/t/eroding-surfaces/6443 "2021-02-11T15:04:45Z")

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Hi, I have some triangulated meshes that Im working with, but my later analysis pipeline is sensitive to the edges of surfaces. Is there any way of eroding edges, and then also applying that selection to other sufaces w…

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## [Vector component in Python Calculator](https://discourse.paraview.org/t/vector-component-in-python-calculator/4030)

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**Author:** [@CapLek](https://discourse.paraview.org/u/CapLek)\
**Replies:** 2\
**Last updated:** [February 10, 2021, 8:39pm UTC](https://discourse.paraview.org/t/vector-component-in-python-calculator/4030 "2021-02-10T20:39:26Z")

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Is there a possibility to select a vector component (or scalar, if you want) for processing in Python Calculator filter? In Calculator it’s possible through the special notation, for example to work with X component of d…

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## [ParaView 5.9 on MacOS Catalina 10.15.7 black screen](https://discourse.paraview.org/t/paraview-5-9-on-macos-catalina-10-15-7-black-screen/6435)

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**Author:** [@MBG](https://discourse.paraview.org/u/MBG)\
**Replies:** 2\
**Last updated:** [February 10, 2021, 3:17pm UTC](https://discourse.paraview.org/t/paraview-5-9-on-macos-catalina-10-15-7-black-screen/6435 "2021-02-10T15:17:40Z")

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The file works in ParaView 5.6.2. This Calculator expression is used to load the NetCDF file in spherical coordinates as Unstructured (disable Spherical Coordinates checkbox because it’s not work… don’t touch Vertical Sc…

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## [Trouble Building External Plugins with Superbuild](https://discourse.paraview.org/t/trouble-building-external-plugins-with-superbuild/4851)

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**Author:** [@npillai2](https://discourse.paraview.org/u/npillai2)\
**Replies:** 6\
**Last updated:** [February 10, 2021, 2:57pm UTC](https://discourse.paraview.org/t/trouble-building-external-plugins-with-superbuild/4851 "2021-02-10T14:57:07Z")

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When I configure a build using the paraview-superbuild (v5.8.0), I don’t see any external plugins built, despite configuring them as follows: cmake -make \\ -DENABLE\_paraviewpluginsexternal=ON \\ -Dparaview\_PLUGINS\_AUTO…

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## [how to auto load data when setup server](https://discourse.paraview.org/t/how-to-auto-load-data-when-setup-server/6432)

<div class="topic-metadata">

**Author:** [@sharon](https://discourse.paraview.org/u/sharon)\
**Replies:** 0\
**Last updated:** [February 10, 2021, 7:04am UTC](https://discourse.paraview.org/t/how-to-auto-load-data-when-setup-server/6432 "2021-02-10T07:04:10Z")

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Dear Experts, I want to auto load some data when i setup pvserver before client connect to it, is this possible for paraview, how to do it? Thanks and best regards, sharon

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## [Save screenshot for all time steps](https://discourse.paraview.org/t/save-screenshot-for-all-time-steps/6429)

<div class="topic-metadata">

**Author:** [@NicolaM](https://discourse.paraview.org/u/NicolaM)\
**Replies:** 3\
**Last updated:** [February 9, 2021, 8:20pm UTC](https://discourse.paraview.org/t/save-screenshot-for-all-time-steps/6429 "2021-02-09T20:20:54Z")

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Hi everyone, How can I save screenshots of the same scene for every time step? (Like exporting data “for all time steps”) Thanks a lot

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## [View Unsteady (transient) particle data (DPM) from Fluent in PARAVIEW](https://discourse.paraview.org/t/view-unsteady-transient-particle-data-dpm-from-fluent-in-paraview/6427)

<div class="topic-metadata">

**Author:** [@bazinga22](https://discourse.paraview.org/u/bazinga22)\
**Replies:** 0\
**Last updated:** [February 9, 2021, 4:24pm UTC](https://discourse.paraview.org/t/view-unsteady-transient-particle-data-dpm-from-fluent-in-paraview/6427 "2021-02-09T16:24:24Z")

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Hello everyone! I have successfully converted my solution data (from fluent) to .encase and then to .case in order to view the solution fluent data successfully in PARAVIEW. However I have not found a way to export my U…

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## [Lift and drag force calculation](https://discourse.paraview.org/t/lift-and-drag-force-calculation/6425)

<div class="topic-metadata">

**Author:** [@yashika\_dhote](https://discourse.paraview.org/u/yashika_dhote)\
**Replies:** 0\
**Last updated:** [February 9, 2021, 10:41am UTC](https://discourse.paraview.org/t/lift-and-drag-force-calculation/6425 "2021-02-09T10:41:34Z")

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Dear Paraview users, I am trying to calculate lift and drag forces on a microfluidic 2D droplet traveling in oil channel. I followed an online tutorial “https://www.youtube.com/watch?v=J944HOj\_4b0&feature=emb\_logo”. It …

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## [Extracting data depending on a block](https://discourse.paraview.org/t/extracting-data-depending-on-a-block/6337)

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**Author:** [@Hokon\_Kim](https://discourse.paraview.org/u/Hokon_Kim)\
**Replies:** 8\
**Last updated:** [February 9, 2021, 9:38am UTC](https://discourse.paraview.org/t/extracting-data-depending-on-a-block/6337 "2021-02-09T09:38:08Z")

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Hello, I am trying to extract point data depending on blocks. As far as I know, depending block that I activated, extracting point data will be different. For example, I’m looking for a variable A from block A, block B…

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## [How to show cells that had a certain value at any given timestep?](https://discourse.paraview.org/t/how-to-show-cells-that-had-a-certain-value-at-any-given-timestep/6424)

<div class="topic-metadata">

**Author:** [@Terry](https://discourse.paraview.org/u/Terry)\
**Replies:** 2\
**Last updated:** [February 9, 2021, 9:04am UTC](https://discourse.paraview.org/t/how-to-show-cells-that-had-a-certain-value-at-any-given-timestep/6424 "2021-02-09T09:04:14Z")

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Hi, I do CFD with phase changes and I need to see what had been melted. The general goal is an comparison with micrographs from experiments. A heat source melts my material (a value changes from 0 to 1) and the material…

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## [multiple timesteps with same Point/Cell data xml](https://discourse.paraview.org/t/multiple-timesteps-with-same-point-cell-data-xml/6400)

<div class="topic-metadata">

**Author:** [@mersoj](https://discourse.paraview.org/u/mersoj)\
**Replies:** 3\
**Last updated:** [February 9, 2021, 3:53am UTC](https://discourse.paraview.org/t/multiple-timesteps-with-same-point-cell-data-xml/6400 "2021-02-09T03:53:11Z")

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I have a simulation that has multiple timesteps the data is saved as the original coordinates and displacements at each time step. Since the Points and Cells don’t change I’d like to only have to write this to disk once. …

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## [Creating an animation](https://discourse.paraview.org/t/creating-an-animation/6416)

<div class="topic-metadata">

**Author:** [@R\_Surya\_Narayan](https://discourse.paraview.org/u/R_Surya_Narayan)\
**Replies:** 13\
**Last updated:** [February 8, 2021, 6:26pm UTC](https://discourse.paraview.org/t/creating-an-animation/6416 "2021-02-08T18:26:05Z")

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hello I am new to paraview and am trying to produce an animation from a group. When I select the group and set the required properties in the cell array status shown below and hit run in the top nothing happens. Can anyo…

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## [Porting an existing VisIt plugin](https://discourse.paraview.org/t/porting-an-existing-visit-plugin/6410)

<div class="topic-metadata">

**Author:** [@henry2004y](https://discourse.paraview.org/u/henry2004y)\
**Replies:** 4\
**Last updated:** [February 8, 2021, 5:09pm UTC](https://discourse.paraview.org/t/porting-an-existing-visit-plugin/6410 "2021-02-08T17:09:16Z")

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Hi, I am not familiar with the plugin workflow in ParaView. I notice a few years ago a new VTKPythonAlgorithmBase is introduced to quickly build a customized plugin, while the old way seems to be relying on some XML fil…

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