# Support

**URL:** https://discourse.vtk.org/c/support/6.md?page=35

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

**Page:** 36

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## [vtkResampleToImage for volume rendering of big data](https://discourse.vtk.org/t/vtkresampletoimage-for-volume-rendering-of-big-data/12867)

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**Author:** [@s195t](https://discourse.vtk.org/u/s195t)\
**Replies:** 1\
**Last updated:** [December 11, 2023, 6:42pm UTC](https://discourse.vtk.org/t/vtkresampletoimage-for-volume-rendering-of-big-data/12867 "2023-12-11T18:42:17Z")

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Hi everyone, I am trying to do a volume rendering of a relatively big cfd case (about 60 mln cells). Before coding everything in c++, I made some test runs with Paraview and because of the size of the mesh, the only wa…

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## [List of dll/dylibs](https://discourse.vtk.org/t/list-of-dll-dylibs/12858)

<div class="topic-metadata">

**Author:** [@s195t](https://discourse.vtk.org/u/s195t)\
**Replies:** 1\
**Last updated:** [December 11, 2023, 3:10pm UTC](https://discourse.vtk.org/t/list-of-dll-dylibs/12858 "2023-12-11T15:10:04Z")

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Hi everyone, I was wondering if there is a way to know beforehand the name of the dll/dylibs to link to the executable for a certain class. For example I was interested in the vtkResampleToImage class and I wanted to kn…

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## [ID Tagging for Actors and Mappers](https://discourse.vtk.org/t/id-tagging-for-actors-and-mappers/12868)

<div class="topic-metadata">

**Author:** [@Alireza](https://discourse.vtk.org/u/Alireza)\
**Replies:** 2\
**Last updated:** [December 11, 2023, 1:51pm UTC](https://discourse.vtk.org/t/id-tagging-for-actors-and-mappers/12868 "2023-12-11T13:51:32Z")

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Is there any way to tag an actor or mapper with an ID? This would be helpful for debugging purposes, especially when there are multiple actors or mappers.

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## [VTK Filters/Parallel/Testing/Cxx DistributedDataRenderPass.cxx Unable to start event loop](https://discourse.vtk.org/t/vtk-filters-parallel-testing-cxx-distributeddatarenderpass-cxx-unable-to-start-event-loop/12854)

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**Author:** [@realwhzc](https://discourse.vtk.org/u/realwhzc)\
**Replies:** 1\
**Last updated:** [December 11, 2023, 3:07am UTC](https://discourse.vtk.org/t/vtk-filters-parallel-testing-cxx-distributeddatarenderpass-cxx-unable-to-start-event-loop/12854 "2023-12-11T03:07:39Z")

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I replaced int DistributedDataRenderPass(int argc, char\* argv) by int main(int argc, char\* argv) I used mpiexec to run it ,but the rendering window flashed by. I added cin.get() after iren-\>start() to make the …

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## [Using vtkImageTracingWidget with QT in python crash](https://discourse.vtk.org/t/using-vtkimagetracingwidget-with-qt-in-python-crash/2545)

<div class="topic-metadata">

**Author:** [@FabianTRobles](https://discourse.vtk.org/u/FabianTRobles)\
**Replies:** 1\
**Last updated:** [December 10, 2023, 3:37am UTC](https://discourse.vtk.org/t/using-vtkimagetracingwidget-with-qt-in-python-crash/2545 "2023-12-10T03:37:52Z")

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Hi everyone, I have a problem with the implementation of Vtk ImageTracerWidget using Qt and python. I have found an example that works using a vtkRenderWindowInteractor (https://github.com/Kitware/VTK/blob/master/Exam…

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## [vtk ospray pathtracer setmaxframes accumulate for OSMesa how](https://discourse.vtk.org/t/vtk-ospray-pathtracer-setmaxframes-accumulate-for-osmesa-how/12871)

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**Author:** [@Spacetracker](https://discourse.vtk.org/u/Spacetracker)\
**Replies:** 0\
**Last updated:** [December 8, 2023, 9:31pm UTC](https://discourse.vtk.org/t/vtk-ospray-pathtracer-setmaxframes-accumulate-for-osmesa-how/12871 "2023-12-08T21:31:50Z")

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Post Submission Update: I looked at the source code to vtkOSPRayRendererNode Does setting both of these parameters to the same count do what I want? SetSamplesPerPixel(64, renderer) SetMaxFrames(64, renderer) I have…

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## [how to get the boundary?](https://discourse.vtk.org/t/how-to-get-the-boundary/12864)

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**Author:** [@Nattu\_Natasha](https://discourse.vtk.org/u/Nattu_Natasha)\
**Replies:** 0\
**Last updated:** [December 7, 2023, 6:07am UTC](https://discourse.vtk.org/t/how-to-get-the-boundary/12864 "2023-12-07T06:07:16Z")

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I have an STL file which is a block support. after slicing the STL file , when I try to print the layer I am only getting inner lines , I am loosing the outer lines {boarder} . posting some pictures for reference. Is the…

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## [OSMesa + vtkHardwareSelector - is that possible ?](https://discourse.vtk.org/t/osmesa-vtkhardwareselector-is-that-possible/12826)

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**Author:** [@tbridel](https://discourse.vtk.org/u/tbridel)\
**Replies:** 2\
**Last updated:** [December 6, 2023, 4:18pm UTC](https://discourse.vtk.org/t/osmesa-vtkhardwareselector-is-that-possible/12826 "2023-12-06T16:18:56Z")

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Hi everyone, I am trying to use a vtkHardwareSelector with an OSMesa-based VTK distribution. And it does not work so far … help ! :pray: Has anyone ever attempted this ? I tried looking on the Paraview side, but nothi…

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## [Off screen rendering problem](https://discourse.vtk.org/t/off-screen-rendering-problem/12861)

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**Author:** [@Olivier](https://discourse.vtk.org/u/Olivier)\
**Replies:** 0\
**Last updated:** [December 6, 2023, 8:51am UTC](https://discourse.vtk.org/t/off-screen-rendering-problem/12861 "2023-12-06T08:51:49Z")

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Hi Friends, I’m using off screen rendering to make “shots” of a VTK scene. I have a Main Renderer containing actors, and a List of actors “ActorsToShoot” to shoot. The technic I’m using is quit simple (C# pseudo code)…

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## [How to disabel vtkHandleWidget in vtkCaptionWidget?](https://discourse.vtk.org/t/how-to-disabel-vtkhandlewidget-in-vtkcaptionwidget/12860)

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**Author:** [@Mordrago](https://discourse.vtk.org/u/Mordrago)\
**Replies:** 0\
**Last updated:** [December 6, 2023, 8:21am UTC](https://discourse.vtk.org/t/how-to-disabel-vtkhandlewidget-in-vtkcaptionwidget/12860 "2023-12-06T08:21:17Z")

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Hello! How to disable the ability to move captionwidget? The point in question is the attachment point of vtkHandleWidget. I’m adding a dozen or so captions and I don’t want it to be possible to move them as they depict…

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## [how to make reslice cursor axis orthogonal while moving one of them?](https://discourse.vtk.org/t/how-to-make-reslice-cursor-axis-orthogonal-while-moving-one-of-them/12859)

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**Author:** [@JunyiPan](https://discourse.vtk.org/u/JunyiPan)\
**Replies:** 0\
**Last updated:** [December 6, 2023, 7:43am UTC](https://discourse.vtk.org/t/how-to-make-reslice-cursor-axis-orthogonal-while-moving-one-of-them/12859 "2023-12-06T07:43:11Z")

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I’m using vtk8.0 and I made a MPR four plane use vtkResliceImageViewer and vtkResliceCursor,when I move(rotate) one of the axis,the other didn’t move. I can’t find anyway to make them move together except press the ctrl…

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## [When I use QVTKOpenGlnativeWidget, the volume rendering data of VTKSmartVolumeMapper cannot be displayed. When I change the multi-sampling parameter to 0, it can be displayed, but the effect is not good](https://discourse.vtk.org/t/when-i-use-qvtkopenglnativewidget-the-volume-rendering-data-of-vtksmartvolumemapper-cannot-be-displayed-when-i-change-the-multi-sampling-parameter-to-0-it-can-be-displayed-but-the-effect-is-not-good/5383)

<div class="topic-metadata">

**Author:** [@loufear](https://discourse.vtk.org/u/loufear)\
**Replies:** 3\
**Last updated:** [December 6, 2023, 2:56am UTC](https://discourse.vtk.org/t/when-i-use-qvtkopenglnativewidget-the-volume-rendering-data-of-vtksmartvolumemapper-cannot-be-displayed-when-i-change-the-multi-sampling-parameter-to-0-it-can-be-displayed-but-the-effect-is-not-good/5383 "2023-12-06T02:56:01Z")

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Is there a better solution?

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## [vtk wiki potentially hacked?](https://discourse.vtk.org/t/vtk-wiki-potentially-hacked/12849)

<div class="topic-metadata">

**Author:** [@codeling](https://discourse.vtk.org/u/codeling)\
**Replies:** 1\
**Last updated:** [December 5, 2023, 12:39pm UTC](https://discourse.vtk.org/t/vtk-wiki-potentially-hacked/12849 "2023-12-05T12:39:56Z")

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From the log of the vtk wiki, it looks like most entries from 2023 (most of them entered in spurts in February, July and August) contain questionable content. From a cursory glance, there’s even potentially dangerous con…

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## [Can not vtkImageData::SafeDownCast from vtkDataSet](https://discourse.vtk.org/t/can-not-vtkimagedata-safedowncast-from-vtkdataset/12847)

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**Author:** [@osemmler](https://discourse.vtk.org/u/osemmler)\
**Replies:** 0\
**Last updated:** [December 5, 2023, 10:42am UTC](https://discourse.vtk.org/t/can-not-vtkimagedata-safedowncast-from-vtkdataset/12847 "2023-12-05T10:42:28Z")

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Hello, I’m having the following problem. I can’t get vtkImageData from vtkDataSet: vtkDataSet\* output = vtkDataSet::GetData(outputVector-\>GetInformationObject(i)); output-\>ShallowCopy(imageData); imageData-\>Print(std…

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## [How do I make reslice cursor orthogonal in MPR Scene???](https://discourse.vtk.org/t/how-do-i-make-reslice-cursor-orthogonal-in-mpr-scene/10642)

<div class="topic-metadata">

**Author:** [@kookoo9999](https://discourse.vtk.org/u/kookoo9999)\
**Replies:** 2\
**Last updated:** [December 5, 2023, 8:16am UTC](https://discourse.vtk.org/t/how-do-i-make-reslice-cursor-orthogonal-in-mpr-scene/10642 "2023-12-05T08:16:29Z")

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OS : win10 vtk version : 8.0 with QT IDE : VisualStudio 2019(msvc v142) with QT 5.6 I want to be orthogonal each reslice cursor in MPR when I control( e.g rotate, ) a one axis like this. Why are there not maintain or…

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## [fatal error: QVTKOpenGLNativeWidget.h: No such file or directory (when building the BorderWidgetQt)](https://discourse.vtk.org/t/fatal-error-qvtkopenglnativewidget-h-no-such-file-or-directory-when-building-the-borderwidgetqt/1459)

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**Author:** [@mkhalil](https://discourse.vtk.org/u/mkhalil)\
**Replies:** 1\
**Last updated:** [December 5, 2023, 6:24am UTC](https://discourse.vtk.org/t/fatal-error-qvtkopenglnativewidget-h-no-such-file-or-directory-when-building-the-borderwidgetqt/1459 "2023-12-05T06:24:51Z")

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Hi All, I hope you can help me! I finished setting up VTK and I tested it on Sphere example, and it worked! Now I am trying to setup Qt to make a GUI for my project. I installed the latest QT5.13: and reconfigured…

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## [how to find the output file?](https://discourse.vtk.org/t/how-to-find-the-output-file/3631)

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**Author:** [@gustave](https://discourse.vtk.org/u/gustave)\
**Replies:** 9\
**Last updated:** [December 5, 2023, 12:43am UTC](https://discourse.vtk.org/t/how-to-find-the-output-file/3631 "2023-12-05T00:43:14Z")

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Hello ! I just put myself on vtk to visualize hydrogen adsorbing molecules from RASPA.2 software. When I launch vtk I get the following message: assoualaye@assoualaye-Latitude-E6220:~/vtk\_ex/materials/Demos/Simple$ vtk…

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## [Is it possible to implement vtkImageReslice on the GPU?](https://discourse.vtk.org/t/is-it-possible-to-implement-vtkimagereslice-on-the-gpu/12795)

<div class="topic-metadata">

**Author:** [@Anton\_Botnov](https://discourse.vtk.org/u/Anton_Botnov)\
**Replies:** 19\
**Last updated:** [December 4, 2023, 12:11pm UTC](https://discourse.vtk.org/t/is-it-possible-to-implement-vtkimagereslice-on-the-gpu/12795 "2023-12-04T12:11:20Z")

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Hello, everyone. I ask the community to help me with the following question: Is it possible to implement vtkImageReslice on the GPU? I have a proposed solution to this problem, but I may be missing something. The algor…

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## [Is there any way to get older version documentation?](https://discourse.vtk.org/t/is-there-any-way-to-get-older-version-documentation/12828)

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**Author:** [@xiaohuijieao](https://discourse.vtk.org/u/xiaohuijieao)\
**Replies:** 1\
**Last updated:** [December 4, 2023, 2:23pm UTC](https://discourse.vtk.org/t/is-there-any-way-to-get-older-version-documentation/12828 "2023-12-04T14:23:02Z")

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I’m using V9.1.0，but I can’t switch the documentation(VTK documentation) version. How can I change the lastest to older version? What I want to do is Checking the system requirement(Minimum OpenGL version), is there an…

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## [VTK +pcl viewer Press the left mouse button and the three-dimensional object will disappear](https://discourse.vtk.org/t/vtk-pcl-viewer-press-the-left-mouse-button-and-the-three-dimensional-object-will-disappear/12833)

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**Author:** [@bowen\_zhu](https://discourse.vtk.org/u/bowen_zhu)\
**Replies:** 0\
**Last updated:** [December 4, 2023, 3:51am UTC](https://discourse.vtk.org/t/vtk-pcl-viewer-press-the-left-mouse-button-and-the-three-dimensional-object-will-disappear/12833 "2023-12-04T03:51:15Z")

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if i press left mouse the object is disappear ，and only show the bounding box I am using the default mouse events，please help me

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## [QT integration with vtkImageViewer2 in QVTKOpenGLNativeWidget](https://discourse.vtk.org/t/qt-integration-with-vtkimageviewer2-in-qvtkopenglnativewidget/12824)

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**Author:** [@MagicLudo](https://discourse.vtk.org/u/MagicLudo)\
**Replies:** 1\
**Last updated:** [December 2, 2023, 7:03am UTC](https://discourse.vtk.org/t/qt-integration-with-vtkimageviewer2-in-qvtkopenglnativewidget/12824 "2023-12-02T07:03:40Z")

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Hello everyone ! I’m new to using QT and VTK and trying to get the two to work together. The actual project is very simple and it’s a test project (few lines of code) for a bigger one. I would like to be able to displa…

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## [Resize vtkCaptionRepresentation Box](https://discourse.vtk.org/t/resize-vtkcaptionrepresentation-box/12817)

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**Author:** [@Mordrago](https://discourse.vtk.org/u/Mordrago)\
**Replies:** 3\
**Last updated:** [December 1, 2023, 7:59am UTC](https://discourse.vtk.org/t/resize-vtkcaptionrepresentation-box/12817 "2023-12-01T07:59:27Z")

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Hello, I want to resize the boundarybox that is attached to the vtkCaptionRepresentation. When I display too much text despite increasing the font size, the text is very small, as the boundary box does not change its si…

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## [LSDynaReader Fails on ALE D3PLOT Files](https://discourse.vtk.org/t/lsdynareader-fails-on-ale-d3plot-files/12808)

<div class="topic-metadata">

**Author:** [@anonymous-beaver](https://discourse.vtk.org/u/anonymous-beaver)\
**Replies:** 3\
**Last updated:** [December 1, 2023, 8:05am UTC](https://discourse.vtk.org/t/lsdynareader-fails-on-ale-d3plot-files/12808 "2023-12-01T08:05:34Z")

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Hello all, I am trying to load LS-DYNA D3PLOT files from Arbitrary Lagrangian-Eulerian (ALE) and Structured Arbitrary Lagrangian-Eulerian (S-ALE) simulations into VTK data structures. However, it seems that the LSDynaRe…

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## [How to order the points of a line that has been cut?](https://discourse.vtk.org/t/how-to-order-the-points-of-a-line-that-has-been-cut/12807)

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**Author:** [@Jaafar\_Nasrabadi](https://discourse.vtk.org/u/Jaafar_Nasrabadi)\
**Replies:** 0\
**Last updated:** [November 29, 2023, 3:56pm UTC](https://discourse.vtk.org/t/how-to-order-the-points-of-a-line-that-has-been-cut/12807 "2023-11-29T15:56:12Z")

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Hi. I have cut a closed curve with a plane, but the order of the cut curve points is not in the order of the start and end of the cut curve, but starts from where the original curve started. I used the vtkstripper but s…

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## [Volume rendering with VTK: CPU-based OK, GPU-based not visible](https://discourse.vtk.org/t/volume-rendering-with-vtk-cpu-based-ok-gpu-based-not-visible/475)

<div class="topic-metadata">

**Author:** [@Marco](https://discourse.vtk.org/u/Marco)\
**Replies:** 9\
**Last updated:** [November 29, 2023, 2:20pm UTC](https://discourse.vtk.org/t/volume-rendering-with-vtk-cpu-based-ok-gpu-based-not-visible/475 "2023-11-29T14:20:54Z")

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Hi VTK experts. I am experimenting with Volume Rendering in my VTK-based Java application, and I am facing some issues with the GPU-based volume mapper. On the other side, my code seems to work fine (but slow) with the …

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## [Using vtkRenderer and vtkOpenGLRenderer](https://discourse.vtk.org/t/using-vtkrenderer-and-vtkopenglrenderer/12805)

<div class="topic-metadata">

**Author:** [@Hedwig\_Huang](https://discourse.vtk.org/u/Hedwig_Huang)\
**Replies:** 0\
**Last updated:** [November 29, 2023, 8:35am UTC](https://discourse.vtk.org/t/using-vtkrenderer-and-vtkopenglrenderer/12805 "2023-11-29T08:35:15Z")

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Hi there, I upgrade VTK8.2 from VTK8.0 and my project successfully compiled and run. But I found something interesting, like when just replacing libraries, the CPU memory usage is increasing from 7-10% to 20-30%, and the…

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## [Iam getting a error regarding an exception in the below code . what is the problem .Iam unable to get that one](https://discourse.vtk.org/t/iam-getting-a-error-regarding-an-exception-in-the-below-code-what-is-the-problem-iam-unable-to-get-that-one/12804)

<div class="topic-metadata">

**Author:** [@Nattu\_Natasha](https://discourse.vtk.org/u/Nattu_Natasha)\
**Replies:** 0\
**Last updated:** [November 29, 2023, 6:43am UTC](https://discourse.vtk.org/t/iam-getting-a-error-regarding-an-exception-in-the-below-code-what-is-the-problem-iam-unable-to-get-that-one/12804 "2023-11-29T06:43:25Z")

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\#include \<vtkSmartPointer.h\> #include \<vtkChartXY.h\> #include \<vtkPlot.h\> #include \<vtkFloatArray.h\> #include \<vtkTable.h\> #include \<vtkContextView.h\> #include \<vtkRenderWindow.h\> #include \<vtkRenderWindowInteract…

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## [Multi-User for trame](https://discourse.vtk.org/t/multi-user-for-trame/12791)

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**Author:** [@Theodliu](https://discourse.vtk.org/u/Theodliu)\
**Replies:** 2\
**Last updated:** [November 29, 2023, 1:32am UTC](https://discourse.vtk.org/t/multi-user-for-trame/12791 "2023-11-29T01:32:28Z")

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Hi, I have successfully established a multi-user capability, allowing multiple users to access and use the headless server’s resources. However, I am experiencing frequent system crashes but there is enough memory availa…

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## [vtkOrientationMarkerWidget won't show in pyqt5](https://discourse.vtk.org/t/vtkorientationmarkerwidget-wont-show-in-pyqt5/6320)

<div class="topic-metadata">

**Author:** [@Ricardo\_M\_Picado](https://discourse.vtk.org/u/Ricardo_M_Picado)\
**Replies:** 9\
**Last updated:** [November 28, 2023, 4:58pm UTC](https://discourse.vtk.org/t/vtkorientationmarkerwidget-wont-show-in-pyqt5/6320 "2023-11-28T16:58:22Z")

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Hi, I am trying to reproduce a python (3.8) VTK (9.0.3) code: colors = vtk.vtkNamedColors() ren = vtk.vtkRenderer() renWin = vtk.vtkRenderWindow() renWin.AddRenderer(ren) iren = vtk.vtkRenderWindowIn…

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## [\`vtkDelaunay2D\` exception with number of points 120k](https://discourse.vtk.org/t/vtkdelaunay2d-exception-with-number-of-points-120k/12786)

<div class="topic-metadata">

**Author:** [@kerim](https://discourse.vtk.org/u/kerim)\
**Replies:** 10\
**Last updated:** [November 28, 2023, 10:38am UTC](https://discourse.vtk.org/t/vtkdelaunay2d-exception-with-number-of-points-120k/12786 "2023-11-28T10:38:11Z")

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Hi, While perfoming triangulation on XYZ data with 120 thousands of points I noticed the application crashes. But it works fine with 100k of points. It doesn’t fill much RAM so I don’t think the problem is connected w…

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