# Latest

**URL:** https://discourse.vtk.org/latest.md?page=87

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

**Page:** 88

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## [Rotate VtkImatgePlanWidget With vtkLineWidget](https://discourse.vtk.org/t/rotate-vtkimatgeplanwidget-with-vtklinewidget/11404)

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**Author:** [@m.h.shanazary](https://discourse.vtk.org/u/m.h.shanazary)\
**Replies:** 4\
**Last updated:** [May 10, 2023, 9:06am UTC](https://discourse.vtk.org/t/rotate-vtkimatgeplanwidget-with-vtklinewidget/11404 "2023-05-10T09:06:56Z")

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Hi I Trying To Rotate VtkImagePlanWidget With VtkLineWidget I Create VtkImage Plan Widget And Vtk Line Widget And Set Event On Vtk Line Widget vtkPlaneSource ps = vtkPlaneSource.SafeDownCast(planeWidget.GetPolyDataA…

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## [Are multiple "PointData" datasets supported using VTKHDF "ImageData".](https://discourse.vtk.org/t/are-multiple-pointdata-datasets-supported-using-vtkhdf-imagedata/11418)

<div class="topic-metadata">

**Author:** [@HendersonSC](https://discourse.vtk.org/u/HendersonSC)\
**Replies:** 1\
**Last updated:** [May 9, 2023, 8:10pm UTC](https://discourse.vtk.org/t/are-multiple-pointdata-datasets-supported-using-vtkhdf-imagedata/11418 "2023-05-09T20:10:37Z")

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The documentation for VTKHDF seems to suggest that the following code: import h5py import numpy as np with h5py.File("wtf.hdf",'w') as hdffile: # write support data vtkhdf\_group = hdffile.create\_group(…

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## [Certificate verification failed](https://discourse.vtk.org/t/certificate-verification-failed/11385)

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**Author:** [@automata](https://discourse.vtk.org/u/automata)\
**Replies:** 11\
**Last updated:** [May 9, 2023, 5:49pm UTC](https://discourse.vtk.org/t/certificate-verification-failed/11385 "2023-05-09T17:49:04Z")

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While trying to install vtk-osmesa, we are getting the following error: Err:5 https://apt.kitware.com/ubuntu bionic Release Certificate verification failed: The certificate is NOT trusted. The received OCSP status res…

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## [vtkSMPThreadLocal - potential issue.](https://discourse.vtk.org/t/vtksmpthreadlocal-potential-issue/11390)

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**Author:** [@Jens\_Munk\_Hansen](https://discourse.vtk.org/u/Jens_Munk_Hansen)\
**Replies:** 0\
**Last updated:** [May 5, 2023, 10:05pm UTC](https://discourse.vtk.org/t/vtksmpthreadlocal-potential-issue/11390 "2023-05-05T22:05:59Z")

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Hi Developers I have used numerous times in the past, but something really weird is going on. I am beginning to think that it is the C++ that comes with VS2022. I am basically just finding the min and max of a set of p…

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## [Paraview can not find reader for .hdf file in Windows](https://discourse.vtk.org/t/paraview-can-not-find-reader-for-hdf-file-in-windows/11398)

<div class="topic-metadata">

**Author:** [@lucasbanting](https://discourse.vtk.org/u/lucasbanting)\
**Replies:** 7\
**Last updated:** [May 9, 2023, 3:24pm UTC](https://discourse.vtk.org/t/paraview-can-not-find-reader-for-hdf-file-in-windows/11398 "2023-05-09T15:24:05Z")

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I am trying to make an Unstructured grid in the HDF file format. I created my file using HDF5.jl. HDF5.File: (read-write) test\_file.h5 └─ :open\_file\_folder: VTKHDF ├─ :label: Version ├─ :1234: Connectivity ├─ …

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## [Question about the boolean operation in vtk](https://discourse.vtk.org/t/question-about-the-boolean-operation-in-vtk/11375)

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**Author:** [@ljx006barbatos](https://discourse.vtk.org/u/ljx006barbatos)\
**Replies:** 4\
**Last updated:** [May 9, 2023, 11:26am UTC](https://discourse.vtk.org/t/question-about-the-boolean-operation-in-vtk/11375 "2023-05-09T11:26:44Z")

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Context: I want to have the union of two walls, the walls may have some offset in both the x and y directions. But the result of my testing is terrible. The result of testing: Codes: int main(int, char\* \[\]) { floa…

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## [the setLineThickness function has just been disappeared](https://discourse.vtk.org/t/the-setlinethickness-function-has-just-been-disappeared/11413)

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**Author:** [@stoune](https://discourse.vtk.org/u/stoune)\
**Replies:** 1\
**Last updated:** [May 9, 2023, 10:57am UTC](https://discourse.vtk.org/t/the-setlinethickness-function-has-just-been-disappeared/11413 "2023-05-09T10:57:36Z")

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In an inferior vtk.js version I could use functions from widgetState (vtkResliceCursorWidget): const widget = vtkResliceCursorWidget.newInstance(); const widgetState = widget.getWidgetState(); // functions like: widget…

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## [Question about the event mouse-hover in MFC project](https://discourse.vtk.org/t/question-about-the-event-mouse-hover-in-mfc-project/11412)

<div class="topic-metadata">

**Author:** [@ljx006barbatos](https://discourse.vtk.org/u/ljx006barbatos)\
**Replies:** 0\
**Last updated:** [May 9, 2023, 10:51am UTC](https://discourse.vtk.org/t/question-about-the-event-mouse-hover-in-mfc-project/11412 "2023-05-09T10:51:30Z")

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Context: I have built a scene with several actors to present two rooms and the components in MFC program, and I want to implement a function: I can print some message to identify components when I put my cursor in the it…

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## [Building VTK for Qt fails due to makefile error](https://discourse.vtk.org/t/building-vtk-for-qt-fails-due-to-makefile-error/11394)

<div class="topic-metadata">

**Author:** [@Z.O.E](https://discourse.vtk.org/u/Z.O.E)\
**Replies:** 1\
**Last updated:** [May 9, 2023, 9:55am UTC](https://discourse.vtk.org/t/building-vtk-for-qt-fails-due-to-makefile-error/11394 "2023-05-09T09:55:15Z")

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Hello, I wanted to use QVTKOpenGLWidget in my Qt application. But I am unable to build VTK for Qt in the first place. I am on Ubuntu 22.04, Qt version installed is 5.15.3, cmake is 3.22.1. I downloaded VTK-8.2.0 and it…

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## [How can make vtkpolydata by points?](https://discourse.vtk.org/t/how-can-make-vtkpolydata-by-points/11072)

<div class="topic-metadata">

**Author:** [@A.M\_Shahpouri](https://discourse.vtk.org/u/A.M_Shahpouri)\
**Replies:** 6\
**Last updated:** [May 9, 2023, 7:26am UTC](https://discourse.vtk.org/t/how-can-make-vtkpolydata-by-points/11072 "2023-05-09T07:26:07Z")

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Hi I have a 3DList of point data . now I want to make a heterogeneous polydata wich inside of that has filled Can you help me to way of do that?

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## [How to ensure that the browser is using WebGL to render instead of WebGPU?](https://discourse.vtk.org/t/how-to-ensure-that-the-browser-is-using-webgl-to-render-instead-of-webgpu/11408)

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**Author:** [@SFC](https://discourse.vtk.org/u/SFC)\
**Replies:** 2\
**Last updated:** [May 9, 2023, 6:27am UTC](https://discourse.vtk.org/t/how-to-ensure-that-the-browser-is-using-webgl-to-render-instead-of-webgpu/11408 "2023-05-09T06:27:29Z")

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My code is running well untill microsoft edge and Google chrome are updated to version 113 which automatically turns on WebGPU. This even makes tubefilter actors invisible and so many other functions which did well on We…

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## [Multi vtkRenderWindow Rendering Issues](https://discourse.vtk.org/t/multi-vtkrenderwindow-rendering-issues/11373)

<div class="topic-metadata">

**Author:** [@a772485252](https://discourse.vtk.org/u/a772485252)\
**Replies:** 4\
**Last updated:** [May 9, 2023, 5:13am UTC](https://discourse.vtk.org/t/multi-vtkrenderwindow-rendering-issues/11373 "2023-05-09T05:13:38Z")

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Hello everyone, I have a question. I have four vtkRenderWindows, one of which has a timer that helps me continuously render something when I start it. At this point, when I interact with other windows, it will block ren…

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## [Cropping plane scaling](https://discourse.vtk.org/t/cropping-plane-scaling/11327)

<div class="topic-metadata">

**Author:** [@theGunner24](https://discourse.vtk.org/u/theGunner24)\
**Replies:** 5\
**Last updated:** [May 8, 2023, 1:20pm UTC](https://discourse.vtk.org/t/cropping-plane-scaling/11327 "2023-05-08T13:20:13Z")

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Hello ! I use AddClippingPlane method in vtk volume rendering and can easily set origin and orientation of plane.Is it possible to also scale cropping plane in volume mapper ? If not because I assume so as vtkPlane is m…

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## [about camera](https://discourse.vtk.org/t/about-camera/11403)

<div class="topic-metadata">

**Author:** [@d\_a](https://discourse.vtk.org/u/d_a)\
**Replies:** 0\
**Last updated:** [May 8, 2023, 7:10am UTC](https://discourse.vtk.org/t/about-camera/11403 "2023-05-08T07:10:58Z")

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I want to get the row cosine and column cosine I want through the two methods of camera.getViewUp() and camera.getViewPlaneNormal(). Then calculate the direction of the slice in MPR. When I change or rotate the slice, th…

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## [Picking label points](https://discourse.vtk.org/t/picking-label-points/11401)

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**Author:** [@machur](https://discourse.vtk.org/u/machur)\
**Replies:** 0\
**Last updated:** [May 7, 2023, 9:41pm UTC](https://discourse.vtk.org/t/picking-label-points/11401 "2023-05-07T21:41:22Z")

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Hi, I’m using VTK to visualize medical data in Python. My goal is to display 3D points with “clickable” labels, so I can pick a label and hide it from the user. I found the following example in C++ that pretty much cov…

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## [Create Depth-Map for vtkDepthImageToPointCloud](https://discourse.vtk.org/t/create-depth-map-for-vtkdepthimagetopointcloud/11380)

<div class="topic-metadata">

**Author:** [@Alejandro\_Rugero](https://discourse.vtk.org/u/Alejandro_Rugero)\
**Replies:** 8\
**Last updated:** [May 7, 2023, 8:58pm UTC](https://discourse.vtk.org/t/create-depth-map-for-vtkdepthimagetopointcloud/11380 "2023-05-07T20:58:14Z")

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Hi, good morning, I’m trying to make a Depth-Map for Create Depth-Map for vtkDepthImageToPointCloud, for 3d reconstruction of jpeg or png images, but I can’t get the Depth-Map image to work as it should, I don’t know if …

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## [Zoom closest to data](https://discourse.vtk.org/t/zoom-closest-to-data/11330)

<div class="topic-metadata">

**Author:** [@vishalkumar2222](https://discourse.vtk.org/u/vishalkumar2222)\
**Replies:** 2\
**Last updated:** [May 6, 2023, 6:01pm UTC](https://discourse.vtk.org/t/zoom-closest-to-data/11330 "2023-05-06T18:01:32Z")

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Hi Guys, I want to implement zoom closest to data. Similar like the one which there in Para view. Thanks in advance,

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## [VTK.js Interfacing with Paraview Server](https://discourse.vtk.org/t/vtk-js-interfacing-with-paraview-server/11369)

<div class="topic-metadata">

**Author:** [@matthugh](https://discourse.vtk.org/u/matthugh)\
**Replies:** 1\
**Last updated:** [May 6, 2023, 5:43pm UTC](https://discourse.vtk.org/t/vtk-js-interfacing-with-paraview-server/11369 "2023-05-06T17:43:14Z")

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I was looking at the examples given of VTK.js and had a couple of questions. I Implemented the 3DGlyph example on the website and now would like to start sending files to a paraview server to be rendered. My questions ar…

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## [how to use vtkRemoteview](https://discourse.vtk.org/t/how-to-use-vtkremoteview/10173)

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**Author:** [@jane](https://discourse.vtk.org/u/jane)\
**Replies:** 3\
**Last updated:** [May 6, 2023, 5:38pm UTC](https://discourse.vtk.org/t/how-to-use-vtkremoteview/10173 "2023-05-06T17:38:33Z")

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how to use vtkRemoteview

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## [How to do axis rotation of AxesActor and adding label](https://discourse.vtk.org/t/how-to-do-axis-rotation-of-axesactor-and-adding-label/11323)

<div class="topic-metadata">

**Author:** [@Sneha-pk](https://discourse.vtk.org/u/Sneha-pk)\
**Replies:** 5\
**Last updated:** [May 6, 2023, 5:34pm UTC](https://discourse.vtk.org/t/how-to-do-axis-rotation-of-axesactor-and-adding-label/11323 "2023-05-06T17:34:50Z")

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Hello, I am using axesActor to represent the axis of my viewer as shown in the image.Is there a label function in vtk.js (i know it is there in C++ and cubeaxesactor) to set labels for axis. Also,while rotating the axi…

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## [vtkImageResliceMapper has weird interpolation artefacts](https://discourse.vtk.org/t/vtkimagereslicemapper-has-weird-interpolation-artefacts/11363)

<div class="topic-metadata">

**Author:** [@Tim\_De\_Bauw](https://discourse.vtk.org/u/Tim_De_Bauw)\
**Replies:** 8\
**Last updated:** [May 5, 2023, 2:49pm UTC](https://discourse.vtk.org/t/vtkimagereslicemapper-has-weird-interpolation-artefacts/11363 "2023-05-05T14:49:35Z")

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I am trying to add colors to a volume. It works for me using the vtkImageMapper, but the vtkImageResliceMapper gives weird interpolation artefacts (see images). code for the initialisation of the actor/mapper: this…

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## [About using the InteractorStyleDrawPolygon](https://discourse.vtk.org/t/about-using-the-interactorstyledrawpolygon/11387)

<div class="topic-metadata">

**Author:** [@HWsir](https://discourse.vtk.org/u/HWsir)\
**Replies:** 0\
**Last updated:** [May 5, 2023, 2:36pm UTC](https://discourse.vtk.org/t/about-using-the-interactorstyledrawpolygon/11387 "2023-05-05T14:36:11Z")

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I display the rendered image of vtk python to the web through the trame framework. At this time, I noticed that the lines drawn by the class InteractorStyleDrawPolygon will not be displayed on the web.Why?

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## [Error: vtkXOpenGLRenderWindow: bad X server connection](https://discourse.vtk.org/t/error-vtkxopenglrenderwindow-bad-x-server-connection/11301)

<div class="topic-metadata">

**Author:** [@automata](https://discourse.vtk.org/u/automata)\
**Replies:** 3\
**Last updated:** [May 5, 2023, 1:35pm UTC](https://discourse.vtk.org/t/error-vtkxopenglrenderwindow-bad-x-server-connection/11301 "2023-05-05T13:35:43Z")

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We are trying to run a Python script that imports VTK and uses pyvirtualdisplay (Xvfb) to render images while running in a Kubernetes pod. We installed VTK through pip install vtk (making sure we had the required libgl1…

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## [How to check if an octant is inside, partially inside, or outside the polydata?](https://discourse.vtk.org/t/how-to-check-if-an-octant-is-inside-partially-inside-or-outside-the-polydata/11321)

<div class="topic-metadata">

**Author:** [@Kunal\_Gupta](https://discourse.vtk.org/u/Kunal_Gupta)\
**Replies:** 2\
**Last updated:** [May 4, 2023, 4:35pm UTC](https://discourse.vtk.org/t/how-to-check-if-an-octant-is-inside-partially-inside-or-outside-the-polydata/11321 "2023-05-04T16:35:22Z")

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How to check if an octant is inside, partially inside, or outside the polydata?

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## [There is a question about vtk BooleanOperation PolyDataFilter](https://discourse.vtk.org/t/there-is-a-question-about-vtk-booleanoperation-polydatafilter/9333)

<div class="topic-metadata">

**Author:** [@Dwight98](https://discourse.vtk.org/u/Dwight98)\
**Replies:** 2\
**Last updated:** [May 4, 2023, 12:39pm UTC](https://discourse.vtk.org/t/there-is-a-question-about-vtk-booleanoperation-polydatafilter/9333 "2023-05-04T12:39:31Z")

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I have a strange problem with vtk for Boolean arithmetic，When i use the intersection operation, the result I get is as shown in the following figure when i use the union operation,the result i get is as shown in the …

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## [CI on Github with Windows](https://discourse.vtk.org/t/ci-on-github-with-windows/11368)

<div class="topic-metadata">

**Author:** [@Ron84](https://discourse.vtk.org/u/Ron84)\
**Replies:** 3\
**Last updated:** [May 4, 2023, 7:41am UTC](https://discourse.vtk.org/t/ci-on-github-with-windows/11368 "2023-05-04T07:41:19Z")

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Is there a compiled version of VTK, that I can use for CI on Windows? Especially for a C++ project, based on VTK.

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## [Adding a couple Information keys to enable temporal filters to be run in situ](https://discourse.vtk.org/t/adding-a-couple-information-keys-to-enable-temporal-filters-to-be-run-in-situ/11356)

<div class="topic-metadata">

**Author:** [@Yohann\_Bearzi](https://discourse.vtk.org/u/Yohann_Bearzi)\
**Replies:** 6\
**Last updated:** [May 3, 2023, 11:06pm UTC](https://discourse.vtk.org/t/adding-a-couple-information-keys-to-enable-temporal-filters-to-be-run-in-situ/11356 "2023-05-03T23:06:53Z")

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There are problems currently when running some temporal filters in situ. Since the entire time series is not available up straight, temporal filters need to be able to produce a correct output up to the available timeste…

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## [Error in ./src/controller.html (1:0)](https://discourse.vtk.org/t/error-in-src-controller-html-1-0/11316)

<div class="topic-metadata">

**Author:** [@matthugh](https://discourse.vtk.org/u/matthugh)\
**Replies:** 6\
**Last updated:** [May 3, 2023, 8:04pm UTC](https://discourse.vtk.org/t/error-in-src-controller-html-1-0/11316 "2023-05-03T20:04:41Z")

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I get that error whenever I include the import for the controller.html in the index.js file and am lost as what I’m doing wrong. Opening the controller.html by itself, the simple webpage works and does not bug out. Ho…

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## [VTK 9.x without hardware OpenGL acceleration on Windows](https://discourse.vtk.org/t/vtk-9-x-without-hardware-opengl-acceleration-on-windows/9396)

<div class="topic-metadata">

**Author:** [@bheld](https://discourse.vtk.org/u/bheld)\
**Replies:** 8\
**Last updated:** [May 3, 2023, 8:03pm UTC](https://discourse.vtk.org/t/vtk-9-x-without-hardware-opengl-acceleration-on-windows/9396 "2023-05-03T20:03:02Z")

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Is there a prescription for VTK 9.x and OpenGL1 (Mesa) now that the OpenGL1 backend in VTK has been removed? The build instructions at https://gitlab.kitware.com/vtk/vtk/-/blob/master/Documentation/dev/build.md really o…

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## [VTK 9 build help](https://discourse.vtk.org/t/vtk-9-build-help/7267)

<div class="topic-metadata">

**Author:** [@no2497](https://discourse.vtk.org/u/no2497)\
**Replies:** 20\
**Last updated:** [May 3, 2023, 8:01pm UTC](https://discourse.vtk.org/t/vtk-9-build-help/7267 "2023-05-03T20:01:16Z")

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Hi I’m trying to build vtk 9 with the python wrapper and including some modules I need (in particular the vtkDICOM), the mesa and building the static libraries. The aim is to be able to use the vtkGDCMImageReader or th…

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