# Latest

**URL:** https://discourse.vtk.org/latest.md?page=128

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

**Page:** 129

---

## [ISAV 2022: In Situ Infrastructures for Enabling Extreme-scale Analysis and Visualization Call for Participation](https://discourse.vtk.org/t/isav-2022-in-situ-infrastructures-for-enabling-extreme-scale-analysis-and-visualization-call-for-participation/8749)

<div class="topic-metadata">

**Author:** [@cory.quammen](https://discourse.vtk.org/u/cory.quammen)\
**Replies:** 0\
**Last updated:** [June 16, 2022, 4:56pm UTC](https://discourse.vtk.org/t/isav-2022-in-situ-infrastructures-for-enabling-extreme-scale-analysis-and-visualization-call-for-participation/8749 "2022-06-16T16:56:24Z")

</div>

ISAV 2022: In Situ Infrastructures for Enabling Extreme-scale Analysis and Visualization Held in conjunction with http://sc22.supercomputing.org/ Half-day: Sunday 13 Nov 2022, 08:30am – 12:00pm CST Room C143-149 Worksh…

---

## [Render the covered object](https://discourse.vtk.org/t/render-the-covered-object/8457)

<div class="topic-metadata">

**Author:** [@Ren](https://discourse.vtk.org/u/Ren)\
**Replies:** 3\
**Last updated:** [June 16, 2022, 4:30pm UTC](https://discourse.vtk.org/t/render-the-covered-object/8457 "2022-06-16T16:30:47Z")

</div>

Hello, everyone. I have two objects to render, one is covered by the other, how to draw the covered object in VTK? In OpenGL, I can set the GL\_DEPTH\_TEST, but I can’t find the api in VTK, thanks.

---

## [External Dashboard and CDash mails](https://discourse.vtk.org/t/external-dashboard-and-cdash-mails/8031)

<div class="topic-metadata">

**Author:** [@mwestphal](https://discourse.vtk.org/u/mwestphal)\
**Replies:** 12\
**Last updated:** [June 16, 2022, 12:55pm UTC](https://discourse.vtk.org/t/external-dashboard-and-cdash-mails/8031 "2022-06-16T12:55:22Z")

</div>

Situation: Some of you may know, some don’t, but VTK have a few external dashboards that are run nightly. There used to be a lot, but now, only RogueResearch dashboard (managed by @seanm ) are in this section. How they…

---

## [Converting triangular polydata to quadratic](https://discourse.vtk.org/t/converting-triangular-polydata-to-quadratic/8744)

<div class="topic-metadata">

**Author:** [@Danial\_Mohajery](https://discourse.vtk.org/u/Danial_Mohajery)\
**Replies:** 0\
**Last updated:** [June 16, 2022, 9:33am UTC](https://discourse.vtk.org/t/converting-triangular-polydata-to-quadratic/8744 "2022-06-16T09:33:10Z")

</div>

Hi, I have segmentation data that I use with MarchingCubes to make an isosurface. Then I use this surface with the probe filter to map intensity values on the mesh. The resulting geometry has triangular elements (see th…

---

## [how to make blood vessel model from 3d points](https://discourse.vtk.org/t/how-to-make-blood-vessel-model-from-3d-points/8739)

<div class="topic-metadata">

**Author:** [@gobenpark](https://discourse.vtk.org/u/gobenpark)\
**Replies:** 0\
**Last updated:** [June 15, 2022, 3:13pm UTC](https://discourse.vtk.org/t/how-to-make-blood-vessel-model-from-3d-points/8739 "2022-06-15T15:13:02Z")

</div>

i want to make a blood vessel model with 15 groups of x y z points by making a points for every 15 dicom view ( mri ) So, I composed and expressed the points and the triangular face of each point manually with polydata,…

---

## [Confusion with tool selection: VTK vs ParaView for Web-based volume rendering of large data sets](https://discourse.vtk.org/t/confusion-with-tool-selection-vtk-vs-paraview-for-web-based-volume-rendering-of-large-data-sets/1384)

<div class="topic-metadata">

**Author:** [@bekos](https://discourse.vtk.org/u/bekos)\
**Replies:** 4\
**Last updated:** [June 15, 2022, 2:08pm UTC](https://discourse.vtk.org/t/confusion-with-tool-selection-vtk-vs-paraview-for-web-based-volume-rendering-of-large-data-sets/1384 "2022-06-15T14:08:06Z")

</div>

Hello, I want to develop a Web-based application which performs interactive/real-time volume rendering on a remote server and displays the result on a Web browser. After some reading it appears that VTK, Paraview, and r…

---

## [What is the best way to cut a polydata with a sphere and fill it](https://discourse.vtk.org/t/what-is-the-best-way-to-cut-a-polydata-with-a-sphere-and-fill-it/8734)

<div class="topic-metadata">

**Author:** [@pedrorib3](https://discourse.vtk.org/u/pedrorib3)\
**Replies:** 3\
**Last updated:** [June 15, 2022, 12:33pm UTC](https://discourse.vtk.org/t/what-is-the-best-way-to-cut-a-polydata-with-a-sphere-and-fill-it/8734 "2022-06-15T12:33:34Z")

</div>

Hi, What is the best way to cut a polydata with a sphere and fill it? I have already tried lots of different approaches: vtkBooleanOperationPolydataFilter (with SetOpperationtoDifference) - this seems to achieve the…

---

## [SetEdgeVisibility(1) in VTK 9.1 is now wrong in many models](https://discourse.vtk.org/t/setedgevisibility-1-in-vtk-9-1-is-now-wrong-in-many-models/8728)

<div class="topic-metadata">

**Author:** [@LexaMark](https://discourse.vtk.org/u/LexaMark)\
**Replies:** 0\
**Last updated:** [June 15, 2022, 1:36am UTC](https://discourse.vtk.org/t/setedgevisibility-1-in-vtk-9-1-is-now-wrong-in-many-models/8728 "2022-06-15T01:36:54Z")

</div>

Some discussions are in another page in the Support category while this problem should be in the development category. Edge Show

---

## [How to draw arrows on the reslicer using vtk?](https://discourse.vtk.org/t/how-to-draw-arrows-on-the-reslicer-using-vtk/8719)

<div class="topic-metadata">

**Author:** [@wulicheng](https://discourse.vtk.org/u/wulicheng)\
**Replies:** 2\
**Last updated:** [June 15, 2022, 1:22am UTC](https://discourse.vtk.org/t/how-to-draw-arrows-on-the-reslicer-using-vtk/8719 "2022-06-15T01:22:14Z")

</div>

How to draw an arrow like the 3D slicer?

---

## [How to read tif file using vtkImageReader2](https://discourse.vtk.org/t/how-to-read-tif-file-using-vtkimagereader2/8727)

<div class="topic-metadata">

**Author:** [@MKRangers](https://discourse.vtk.org/u/MKRangers)\
**Replies:** 0\
**Last updated:** [June 14, 2022, 11:21pm UTC](https://discourse.vtk.org/t/how-to-read-tif-file-using-vtkimagereader2/8727 "2022-06-14T23:21:55Z")

</div>

Hi everyone, I have some 16-bit 3D tif files to be read. For some reason vtkTIFFReader cannot read them. However, both ImageJ and ParaView can read and display the images without a problem. So I assumed that there could…

---

## [Distance widget is not rendering](https://discourse.vtk.org/t/distance-widget-is-not-rendering/8725)

<div class="topic-metadata">

**Author:** [@makinox](https://discourse.vtk.org/u/makinox)\
**Replies:** 0\
**Last updated:** [June 14, 2022, 8:47pm UTC](https://discourse.vtk.org/t/distance-widget-is-not-rendering/8725 "2022-06-14T20:47:12Z")

</div>

Hello, good day, I’m trying to use the distance widget in a created volume of DICOM files, but I have a problem that i don’t understand, and it is that the distance widget is shown in some studies and in others down, I h…

---

## [Upcoming changes to vtkCellArray](https://discourse.vtk.org/t/upcoming-changes-to-vtkcellarray/2066)

<div class="topic-metadata">

**Author:** [@allison.vacanti](https://discourse.vtk.org/u/allison.vacanti)\
**Replies:** 16\
**Last updated:** [June 14, 2022, 12:06pm UTC](https://discourse.vtk.org/t/upcoming-changes-to-vtkcellarray/2066 "2022-06-14T12:06:56Z")

</div>

Over the next few days/weeks, we’ll be merging in some major changes to vtkCellArray to support new functionality. This involves some significant changes to the vtkCellArray’s internal data structures, but we’ve retained…

---

## [PaintFilterWorker compilation error, need help](https://discourse.vtk.org/t/paintfilterworker-compilation-error-need-help/8717)

<div class="topic-metadata">

**Author:** [@gzt036](https://discourse.vtk.org/u/gzt036)\
**Replies:** 1\
**Last updated:** [June 14, 2022, 9:21am UTC](https://discourse.vtk.org/t/paintfilterworker-compilation-error-need-help/8717 "2022-06-14T09:21:39Z")

</div>

I am using create-react-app and when importing vtkPaintFilter it causes an error export ‘default’ (imported as ‘PaintFilterWorker’) was not found in ‘vtk.js/Sources/Filters/General/PaintFilter/PaintFilter.worker’ (modul…

---

## [Question About Activiz versions](https://discourse.vtk.org/t/question-about-activiz-versions/8701)

<div class="topic-metadata">

**Author:** [@ahmed.elmalky](https://discourse.vtk.org/u/ahmed.elmalky)\
**Replies:** 3\
**Last updated:** [June 14, 2022, 7:26am UTC](https://discourse.vtk.org/t/question-about-activiz-versions/8701 "2022-06-14T07:26:16Z")

</div>

Hi All, i am new to vtk and i have tasks in C# project that uses ActiViz what i found in the user guide that Activiz comes in two forms - Open-Source edition and supported edition and i found a big delta in the version…

---

## [inner edge display for quadric element is not correct for version 9.1](https://discourse.vtk.org/t/inner-edge-display-for-quadric-element-is-not-correct-for-version-9-1/7665)

<div class="topic-metadata">

**Author:** [@Jay-Yu](https://discourse.vtk.org/u/Jay-Yu)\
**Replies:** 9\
**Last updated:** [June 13, 2022, 9:10am UTC](https://discourse.vtk.org/t/inner-edge-display-for-quadric-element-is-not-correct-for-version-9-1/7665 "2022-06-13T09:10:55Z")

</div>

Could any one help me to solve this issue? the attached file is polyData with quadratic quad elements. when i display surface grid with version 9.0, everything is wonderful. but for version 9.1, some edges visibility are…

---

## [vtkMomentInvariants.cxx build problem](https://discourse.vtk.org/t/vtkmomentinvariants-cxx-build-problem/8705)

<div class="topic-metadata">

**Author:** [@BlueKnight7](https://discourse.vtk.org/u/BlueKnight7)\
**Replies:** 2\
**Last updated:** [June 13, 2022, 2:53pm UTC](https://discourse.vtk.org/t/vtkmomentinvariants-cxx-build-problem/8705 "2022-06-13T14:53:53Z")

</div>

Trying to build 9.1 with debug enabled and see the following: \[ 45%\] Building CXX object Remote/MomentInvariants/MomentInvariants/CMakeFiles/MomentInvariants.dir/vtkMomentInvariants.cxx.o In file included from /home/rm…

---

## [\[RemoteView\] vtk\_server.py not works because vtk.web module not find](https://discourse.vtk.org/t/remoteview-vtk-server-py-not-works-because-vtk-web-module-not-find/8692)

<div class="topic-metadata">

**Author:** [@Albers\_Steven](https://discourse.vtk.org/u/Albers_Steven)\
**Replies:** 4\
**Last updated:** [June 13, 2022, 2:49pm UTC](https://discourse.vtk.org/t/remoteview-vtk-server-py-not-works-because-vtk-web-module-not-find/8692 "2022-06-13T14:49:43Z")

</div>

Hi, I am a front-end developer. And not know much about vtk C++. I get started by follow the doc of Getting Started Using Linux, after build vtk, vtkpython command is works for me. Then I want to test remoteView on my…

---

## [Remove faces in contact with non-manifold edges](https://discourse.vtk.org/t/remove-faces-in-contact-with-non-manifold-edges/4116)

<div class="topic-metadata">

**Author:** [@Lucas\_A](https://discourse.vtk.org/u/Lucas_A)\
**Replies:** 13\
**Last updated:** [June 13, 2022, 4:08am UTC](https://discourse.vtk.org/t/remove-faces-in-contact-with-non-manifold-edges/4116 "2022-06-13T04:08:00Z")

</div>

Hi, I have as input a (triangular) mesh that has some holes. I’m trying to execute the vtkFillHolesFilter to close all the holes. It works well for most of the holes, but some of them are not being closed. I discovered …

---

## [how to use QVTKOpenGLNativeWidget to load pcd files with vtk9.1](https://discourse.vtk.org/t/how-to-use-qvtkopenglnativewidget-to-load-pcd-files-with-vtk9-1/8711)

<div class="topic-metadata">

**Author:** [@Marquis3000](https://discourse.vtk.org/u/Marquis3000)\
**Replies:** 0\
**Last updated:** [June 13, 2022, 2:56am UTC](https://discourse.vtk.org/t/how-to-use-qvtkopenglnativewidget-to-load-pcd-files-with-vtk9-1/8711 "2022-06-13T02:56:12Z")

</div>

There is no qtvtkwidget in the latest version of VTK after compilation, I don’t know how to use the new widget(QVTKOpenGLNativeWidget) to load PCD point cloud files. ~Thanks.

---

## [VTK-JS GradientBackgroundOn and SetSize is not working](https://discourse.vtk.org/t/vtk-js-gradientbackgroundon-and-setsize-is-not-working/8700)

<div class="topic-metadata">

**Author:** [@USMANHEART](https://discourse.vtk.org/u/USMANHEART)\
**Replies:** 4\
**Last updated:** [June 13, 2022, 12:23am UTC](https://discourse.vtk.org/t/vtk-js-gradientbackgroundon-and-setsize-is-not-working/8700 "2022-06-13T00:23:39Z")

</div>

I dont know what’s going on. But seems like many methods mentioned in the documents are not working in actual. I am using NPM package for VTK and I can’t see renWin.SetSize and ren.GradientBackgroundOn() official link …

---

## [VTK NPM Mouse/Touch interactor is not working](https://discourse.vtk.org/t/vtk-npm-mouse-touch-interactor-is-not-working/8699)

<div class="topic-metadata">

**Author:** [@USMANHEART](https://discourse.vtk.org/u/USMANHEART)\
**Replies:** 2\
**Last updated:** [June 11, 2022, 5:33pm UTC](https://discourse.vtk.org/t/vtk-npm-mouse-touch-interactor-is-not-working/8699 "2022-06-11T17:33:57Z")

</div>

Hi, I am using vtk in my NPM VUE project. After I create a simple example, I can’t interact the window with my mouse click. I have tried to follow the documentation but it still seems doesn’t work. Anyone who have ide…

---

## [vtkDICOM - is there a list of CT vendors that are supported 'out of the box'](https://discourse.vtk.org/t/vtkdicom-is-there-a-list-of-ct-vendors-that-are-supported-out-of-the-box/8696)

<div class="topic-metadata">

**Author:** [@Orell](https://discourse.vtk.org/u/Orell)\
**Replies:** 2\
**Last updated:** [June 10, 2022, 3:28pm UTC](https://discourse.vtk.org/t/vtkdicom-is-there-a-list-of-ct-vendors-that-are-supported-out-of-the-box/8696 "2022-06-10T15:28:51Z")

</div>

Is there a document listing the vendors and scanner models that are supported by vtkDICOM

---

## [macOS ARM64 configure error](https://discourse.vtk.org/t/macos-arm64-configure-error/8689)

<div class="topic-metadata">

**Author:** [@ocommowi](https://discourse.vtk.org/u/ocommowi)\
**Replies:** 3\
**Last updated:** [June 9, 2022, 9:00pm UTC](https://discourse.vtk.org/t/macos-arm64-configure-error/8689 "2022-06-09T21:00:48Z")

</div>

Hi, I am currently compiling VTK on its release branch for a project on github and I’m testing ARM64 build. The build is made on an intel mac (github actions slave) and I tested two things : setting osx architectures in…

---

## [I have list of 2d images, I would like to visualize in 3d with volume rendering](https://discourse.vtk.org/t/i-have-list-of-2d-images-i-would-like-to-visualize-in-3d-with-volume-rendering/8687)

<div class="topic-metadata">

**Author:** [@Vikash\_Poddar](https://discourse.vtk.org/u/Vikash_Poddar)\
**Replies:** 1\
**Last updated:** [June 9, 2022, 12:51pm UTC](https://discourse.vtk.org/t/i-have-list-of-2d-images-i-would-like-to-visualize-in-3d-with-volume-rendering/8687 "2022-06-09T12:51:27Z")

</div>

I have list of 2d images, I would like to visualize in 3d with volume rendering.

---

## [How to write a 2d image into a vtk file?](https://discourse.vtk.org/t/how-to-write-a-2d-image-into-a-vtk-file/8666)

<div class="topic-metadata">

**Author:** [@Clifford](https://discourse.vtk.org/u/Clifford)\
**Replies:** 5\
**Last updated:** [June 9, 2022, 11:16am UTC](https://discourse.vtk.org/t/how-to-write-a-2d-image-into-a-vtk-file/8666 "2022-06-09T11:16:43Z")

</div>

I use matplotlib to draw my results, and it looks like: Is there any way to write them into a .vtk file and looks like a 3D graph?

---

## [Adding Text to a vtkchartXY](https://discourse.vtk.org/t/adding-text-to-a-vtkchartxy/5156)

<div class="topic-metadata">

**Author:** [@sigigastelum](https://discourse.vtk.org/u/sigigastelum)\
**Replies:** 1\
**Last updated:** [June 9, 2022, 6:27am UTC](https://discourse.vtk.org/t/adding-text-to-a-vtkchartxy/5156 "2022-06-09T06:27:49Z")

</div>

Hello everyone, I am brand new to using VTK and I am interested in it’s 2D plotting capabilities. I am running the scatterplot example: https://lorensen.github.io/VTKExamples/site/Cxx/Plotting/ScatterPlot/ Everything …

---

## [A faster way to get ray intersection result](https://discourse.vtk.org/t/a-faster-way-to-get-ray-intersection-result/8387)

<div class="topic-metadata">

**Author:** [@veltia](https://discourse.vtk.org/u/veltia)\
**Replies:** 6\
**Last updated:** [June 9, 2022, 3:16am UTC](https://discourse.vtk.org/t/a-faster-way-to-get-ray-intersection-result/8387 "2022-06-09T03:16:45Z")

</div>

Hi all, I wanted to get the coordinate rersult of the ray intersection with a polydata/actor I tried with vtkOBBTree and vtkModifiedBSPTree, I could get the correct result coordinate with both, but they seem take too l…

---

## [vtk How to dynamic input character?](https://discourse.vtk.org/t/vtk-how-to-dynamic-input-character/8684)

<div class="topic-metadata">

**Author:** [@wulicheng](https://discourse.vtk.org/u/wulicheng)\
**Replies:** 0\
**Last updated:** [June 9, 2022, 2:55am UTC](https://discourse.vtk.org/t/vtk-how-to-dynamic-input-character/8684 "2022-06-09T02:55:05Z")

</div>

like the title, I want to input some annotation on the slicer of the vtkImageData. But I do not know how to do?

---

## [Problem updating 3D scene when data changes](https://discourse.vtk.org/t/problem-updating-3d-scene-when-data-changes/8672)

<div class="topic-metadata">

**Author:** [@whereismymoney](https://discourse.vtk.org/u/whereismymoney)\
**Replies:** 2\
**Last updated:** [June 8, 2022, 9:33pm UTC](https://discourse.vtk.org/t/problem-updating-3d-scene-when-data-changes/8672 "2022-06-08T21:33:21Z")

</div>

Hello we are migrating from VTK 6.0.0 to VTK 8.2.0, and encountering some problems. We have found that some problems can be fixed like this: renderer-\>RemoveActor(act); act-\>GetMapper()-\>Update(); renderer-\>AddActor(…

---

## [How to extract the dataArray values within a rectangleWidget or shapewidget in vtk.js?](https://discourse.vtk.org/t/how-to-extract-the-dataarray-values-within-a-rectanglewidget-or-shapewidget-in-vtk-js/8679)

<div class="topic-metadata">

**Author:** [@Sneha-pk](https://discourse.vtk.org/u/Sneha-pk)\
**Replies:** 2\
**Last updated:** [June 8, 2022, 2:52pm UTC](https://discourse.vtk.org/t/how-to-extract-the-dataarray-values-within-a-rectanglewidget-or-shapewidget-in-vtk-js/8679 "2022-06-08T14:52:46Z")

</div>

I am trying to develop a region of interest/ROI and a histogram(Piecewise Gussian Widget) corresponding to that ROI. Is there a way to extract the vtkImageData within the region or the dataArray within the ROI? Thanks i…

[Previous page](https://discourse.vtk.org/latest.md?page=127)

[Next page](https://discourse.vtk.org/latest.md?page=129)