# Support

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

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

**Page:** 7

---

## [\[vtkjs\] Reload scene on lost graphic context, best practices?](https://discourse.vtk.org/t/vtkjs-reload-scene-on-lost-graphic-context-best-practices/15789)

<div class="topic-metadata">

**Author:** [@Alex\_Vergara](https://discourse.vtk.org/u/Alex_Vergara)\
**Replies:** 3\
**Last updated:** [August 19, 2025, 2:05pm UTC](https://discourse.vtk.org/t/vtkjs-reload-scene-on-lost-graphic-context-best-practices/15789 "2025-08-19T14:05:23Z")

</div>

Hello Sometimes my scene gets a lost graphic context. Therefore, I shall add a reload scene button. Is there a best practice way to do this, theoretically automatic?

---

## [vtkCubeAxesActor SetUserTransform() has no influence, SetAxisBaseForX incorrect interaction with camera](https://discourse.vtk.org/t/vtkcubeaxesactor-setusertransform-has-no-influence-setaxisbaseforx-incorrect-interaction-with-camera/15972)

<div class="topic-metadata">

**Author:** [@ju4nk4](https://discourse.vtk.org/u/ju4nk4)\
**Replies:** 0\
**Last updated:** [August 18, 2025, 8:57am UTC](https://discourse.vtk.org/t/vtkcubeaxesactor-setusertransform-has-no-influence-setaxisbaseforx-incorrect-interaction-with-camera/15972 "2025-08-18T08:57:53Z")

</div>

Dear all, I have implemented a rendering of simultaneous actors, which are located with base plane tangent to the Globe (SphereSource). I have defined a global reference of coords and rotated the globe using LAT, LON. …

---

## [ITK Image to VTK Image conversion issue](https://discourse.vtk.org/t/itk-image-to-vtk-image-conversion-issue/15962)

<div class="topic-metadata">

**Author:** [@Manjunath\_AV](https://discourse.vtk.org/u/Manjunath_AV)\
**Replies:** 2\
**Last updated:** [August 18, 2025, 5:25am UTC](https://discourse.vtk.org/t/itk-image-to-vtk-image-conversion-issue/15962 "2025-08-18T05:25:41Z")

</div>

I am using ImageToVTKImageFilter to convert ITKImage to VTKImage with the following code: typedef itk::ImageToVTKImageFilter ConverterType; typename ConverterType::Pointer converter = ConverterType::New(); converte…

---

## [VTK Hovering 3D objects](https://discourse.vtk.org/t/vtk-hovering-3d-objects/15967)

<div class="topic-metadata">

**Author:** [@selimcanozgur](https://discourse.vtk.org/u/selimcanozgur)\
**Replies:** 0\
**Last updated:** [August 15, 2025, 1:44pm UTC](https://discourse.vtk.org/t/vtk-hovering-3d-objects/15967 "2025-08-15T13:44:54Z")

</div>

There are 60 different pieces on my 3D screen. I want each piece to hover when I hover over it. I achieved this, but it freezes a lot. How can I synchronize it?

---

## [VTK Js Plane Problem](https://discourse.vtk.org/t/vtk-js-plane-problem/15943)

<div class="topic-metadata">

**Author:** [@selimcanozgur](https://discourse.vtk.org/u/selimcanozgur)\
**Replies:** 2\
**Last updated:** [August 14, 2025, 7:01am UTC](https://discourse.vtk.org/t/vtk-js-plane-problem/15943 "2025-08-14T07:01:46Z")

</div>

I have a problem like this. Many different dicoms are loaded in my project. In the loaded analysis, each of my 3D images comes at a different angle. I’m not sure why they all come at different angles. But my main proble…

---

## [Cross Compile VTK 9.5.0 (with QT Support) for aarch64 linux](https://discourse.vtk.org/t/cross-compile-vtk-9-5-0-with-qt-support-for-aarch64-linux/15950)

<div class="topic-metadata">

**Author:** [@shirasp-bh](https://discourse.vtk.org/u/shirasp-bh)\
**Replies:** 3\
**Last updated:** [August 13, 2025, 3:59am UTC](https://discourse.vtk.org/t/cross-compile-vtk-9-5-0-with-qt-support-for-aarch64-linux/15950 "2025-08-13T03:59:51Z")

</div>

Is there any documentation available on how to cross compile VTK 9.5.0 (with Qt support) for aarch64 linux?

---

## [Seams at texture boudaries - VTK 9.3.1 (C++)](https://discourse.vtk.org/t/seams-at-texture-boudaries-vtk-9-3-1-c/15956)

<div class="topic-metadata">

**Author:** [@us2425](https://discourse.vtk.org/u/us2425)\
**Replies:** 0\
**Last updated:** [August 12, 2025, 9:45pm UTC](https://discourse.vtk.org/t/seams-at-texture-boudaries-vtk-9-3-1-c/15956 "2025-08-12T21:45:19Z")

</div>

I’m rendering a 3D surface mesh in X3D format with an external texture image in VTK 9.3.1 (C++) . The mesh loads and the texture maps correctly overall, but I’m seeing visible seams where the texture edges meet. I suspe…

---

## [Can't change vertex visibility after first render](https://discourse.vtk.org/t/cant-change-vertex-visibility-after-first-render/15923)

<div class="topic-metadata">

**Author:** [@Julien\_Champagnol](https://discourse.vtk.org/u/Julien_Champagnol)\
**Replies:** 9\
**Last updated:** [August 12, 2025, 6:24pm UTC](https://discourse.vtk.org/t/cant-change-vertex-visibility-after-first-render/15923 "2025-08-12T18:24:04Z")

</div>

Hi, The vertex visibility of a PolyData cannot be changed after the first renderWindow-\>Render(); Any change to its attributes (e.g. color, size,…) works, but visibility is stuck in the previous state. For reproduction…

---

## [vtkInteractorStyles that draw selected area fail with QQuickVtkItem](https://discourse.vtk.org/t/vtkinteractorstyles-that-draw-selected-area-fail-with-qquickvtkitem/15798)

<div class="topic-metadata">

**Author:** [@Tomasso](https://discourse.vtk.org/u/Tomasso)\
**Replies:** 7\
**Last updated:** [August 12, 2025, 2:39pm UTC](https://discourse.vtk.org/t/vtkinteractorstyles-that-draw-selected-area-fail-with-qquickvtkitem/15798 "2025-08-12T14:39:55Z")

</div>

I use vtkInteractorStyleRubberBandPick with QQuickVtkItem with VTK 9.3 in my C++ application that uses Qt and VTK. However when I drag the left mouse button, a selection area is not drawn but many warning/error messages …

---

## [\`vtkDataSetTriangleFilter\` changes connectivity ordering](https://discourse.vtk.org/t/vtkdatasettrianglefilter-changes-connectivity-ordering/15928)

<div class="topic-metadata">

**Author:** [@citronella3alain](https://discourse.vtk.org/u/citronella3alain)\
**Replies:** 3\
**Last updated:** [August 12, 2025, 12:03am UTC](https://discourse.vtk.org/t/vtkdatasettrianglefilter-changes-connectivity-ordering/15928 "2025-08-12T00:03:52Z")

</div>

tl;dr: vtkDataSetTriangleFilter causes cell connectivity ordering to change for pure vtk unstructured grid but not in a pyvista uns grid. Why? Does it matter? What am I missing to replicate the latter effect given that p…

---

## [vtkIOCoreModule header file missing, needed for vtkSTLReader](https://discourse.vtk.org/t/vtkiocoremodule-header-file-missing-needed-for-vtkstlreader/15934)

<div class="topic-metadata">

**Author:** [@Rockroyal305](https://discourse.vtk.org/u/Rockroyal305)\
**Replies:** 4\
**Last updated:** [August 10, 2025, 10:27pm UTC](https://discourse.vtk.org/t/vtkiocoremodule-header-file-missing-needed-for-vtkstlreader/15934 "2025-08-10T22:27:34Z")

</div>

I am working to migrate an animated mesh visualization project from python to C++ (previously using pyvista), and I’ve run into a roadblock when attempting to use vtkSTLReader to access my mesh files. My include stateme…

---

## [linking vtk library fail: undefined reference to \`vtksys::SystemToolsManager::SystemToolsManager()](https://discourse.vtk.org/t/linking-vtk-library-fail-undefined-reference-to-vtksys-systemtoolsmanager/15932)

<div class="topic-metadata">

**Author:** [@kuwt](https://discourse.vtk.org/u/kuwt)\
**Replies:** 3\
**Last updated:** [August 8, 2025, 9:31am UTC](https://discourse.vtk.org/t/linking-vtk-library-fail-undefined-reference-to-vtksys-systemtoolsmanager/15932 "2025-08-08T09:31:21Z")

</div>

I have a file a.cpp consisting of the following lines: #include \<vtkVersion.h\> int main(){} I try to build it with vtk 9.3 g++ -L/usr/local/lib -I/usr/local/include/vtk-9.3 -lvtksys-9.3 -o a.out a.cpp but it re…

---

## [vtkAxisActor2D label mispositioned following change from VTK 9.2 to newer (9.4 or 9.5)](https://discourse.vtk.org/t/vtkaxisactor2d-label-mispositioned-following-change-from-vtk-9-2-to-newer-9-4-or-9-5/15935)

<div class="topic-metadata">

**Author:** [@jamesobutler](https://discourse.vtk.org/u/jamesobutler)\
**Replies:** 2\
**Last updated:** [August 8, 2025, 8:54am UTC](https://discourse.vtk.org/t/vtkaxisactor2d-label-mispositioned-following-change-from-vtk-9-2-to-newer-9-4-or-9-5/15935 "2025-08-08T08:54:38Z")

</div>

I primarily use VTK in 3D Slicer (cc @lassoan) and noticed a difference in how my vtkAxisActor2D code works upon switching a version of Slicer that was using VTK 9.2 versus more recent VTK 9.4 and 9.5 versions. My initi…

---

## [vtkHDFWriter for temporal PDS Collection](https://discourse.vtk.org/t/vtkhdfwriter-for-temporal-pds-collection/15774)

<div class="topic-metadata">

**Author:** [@citronella3alain](https://discourse.vtk.org/u/citronella3alain)\
**Replies:** 10\
**Last updated:** [August 7, 2025, 2:10pm UTC](https://discourse.vtk.org/t/vtkhdfwriter-for-temporal-pds-collection/15774 "2025-08-07T14:10:41Z")

</div>

I’m trying to recreate How to write time dependent data in VTKHDF files using the vtkHDFWriter instead of direct h5py wrangling. I’ve successfully done the following: write a non-temporal partitioned data set collecti…

---

## [VTK with OCCT support](https://discourse.vtk.org/t/vtk-with-occt-support/15925)

<div class="topic-metadata">

**Author:** [@TheWizRd](https://discourse.vtk.org/u/TheWizRd)\
**Replies:** 11\
**Last updated:** [August 7, 2025, 6:30am UTC](https://discourse.vtk.org/t/vtk-with-occt-support/15925 "2025-08-07T06:30:16Z")

</div>

For a few days I have been trying to build VTK-9.5.0 with OCCT support. I mainly followed steps from a previous discussion about this topic (Building VTK with OpenCascade support). I managed to create install files of bo…

---

## [How to add text to vtkButtonWidget in VTK-9.3 C++?](https://discourse.vtk.org/t/how-to-add-text-to-vtkbuttonwidget-in-vtk-9-3-c/15921)

<div class="topic-metadata">

**Author:** [@Tomasso](https://discourse.vtk.org/u/Tomasso)\
**Replies:** 1\
**Last updated:** [August 6, 2025, 6:42pm UTC](https://discourse.vtk.org/t/how-to-add-text-to-vtkbuttonwidget-in-vtk-9-3-c/15921 "2025-08-06T18:42:10Z")

</div>

Working with VTK-9.3 C++. I just want to add a text label to a vtkButtonWidget 2D button. I assume the general approach would be to add text to the associated vtkTexturedButtonWidgetRepresentation2D object - but I canno…

---

## [How to color polydata using a vector of HSV data?](https://discourse.vtk.org/t/how-to-color-polydata-using-a-vector-of-hsv-data/15922)

<div class="topic-metadata">

**Author:** [@WillW](https://discourse.vtk.org/u/WillW)\
**Replies:** 1\
**Last updated:** [August 5, 2025, 11:15pm UTC](https://discourse.vtk.org/t/how-to-color-polydata-using-a-vector-of-hsv-data/15922 "2025-08-05T23:15:34Z")

</div>

How do I color a polydata surface of N points using an Nx3 array where the columns correspond to H,S,V values? I have tried using mapper.SetColorModeToDefault() but it doesn’t seem to do what I thought it did. I will be …

---

## [How to implement radio buttons in C++ with vtkButtonWidget using VTK 9.3?](https://discourse.vtk.org/t/how-to-implement-radio-buttons-in-c-with-vtkbuttonwidget-using-vtk-9-3/15907)

<div class="topic-metadata">

**Author:** [@Tomasso](https://discourse.vtk.org/u/Tomasso)\
**Replies:** 6\
**Last updated:** [August 5, 2025, 3:49am UTC](https://discourse.vtk.org/t/how-to-implement-radio-buttons-in-c-with-vtkbuttonwidget-using-vtk-9-3/15907 "2025-08-05T03:49:21Z")

</div>

Using VTK 9.3, C++. For various reasons I want to use only VTK widgets rather than use QT or other toolkits. VTK doesn’t provide a radio button widget, so trying to implement that but having a heck of a time. I have sear…

---

## [Rendering artifact with slab MPR](https://discourse.vtk.org/t/rendering-artifact-with-slab-mpr/15914)

<div class="topic-metadata">

**Author:** [@twilson](https://discourse.vtk.org/u/twilson)\
**Replies:** 7\
**Last updated:** [August 5, 2025, 2:04am UTC](https://discourse.vtk.org/t/rendering-artifact-with-slab-mpr/15914 "2025-08-05T02:04:28Z")

</div>

I have a test program to implement slab MPR rendering using vtkImageResliceMapper. I am seeing a strange broken line artifact around the edge of the image after interacting in the viewport. When the slab MPR image is fi…

---

## [Generate C APIs](https://discourse.vtk.org/t/generate-c-apis/15886)

<div class="topic-metadata">

**Author:** [@Nikon\_Sugar](https://discourse.vtk.org/u/Nikon_Sugar)\
**Replies:** 14\
**Last updated:** [August 4, 2025, 11:40pm UTC](https://discourse.vtk.org/t/generate-c-apis/15886 "2025-08-04T23:40:37Z")

</div>

I was wondering how to generate C APIs using wrapping tool. The idea is that C APIs can be based to create binding to other languages such as Rust, Zig. Any guide with coding snippet would be appreciated. Thank you!

---

## [vtkHandleWidget in Java](https://discourse.vtk.org/t/vtkhandlewidget-in-java/15872)

<div class="topic-metadata">

**Author:** [@Gilthalas](https://discourse.vtk.org/u/Gilthalas)\
**Replies:** 3\
**Last updated:** [August 4, 2025, 1:58pm UTC](https://discourse.vtk.org/t/vtkhandlewidget-in-java/15872 "2025-08-04T13:58:01Z")

</div>

Hi - using vtk9.2.6. Trying to get vtkHandleWidget along with a vtkSphereHandleRepresentation. The sphere renders just fine, but I cannot for the life of me get the actual sphere to move. It seems to recognize the var…

---

## [VTK volume partition coloring](https://discourse.vtk.org/t/vtk-volume-partition-coloring/15888)

<div class="topic-metadata">

**Author:** [@woxiarong](https://discourse.vtk.org/u/woxiarong)\
**Replies:** 3\
**Last updated:** [August 4, 2025, 8:59am UTC](https://discourse.vtk.org/t/vtk-volume-partition-coloring/15888 "2025-08-04T08:59:55Z")

</div>

hello, I’m trouble in learn vtk. I have two nii format file, one is someone’s data, another is standard aal data with scalar range, I want to know how can it be achieved like the screenshot that someone’s data can be …

---

## [Current state of VTK.js in July 2025](https://discourse.vtk.org/t/current-state-of-vtk-js-in-july-2025/15871)

<div class="topic-metadata">

**Author:** [@notsaltylol](https://discourse.vtk.org/u/notsaltylol)\
**Replies:** 4\
**Last updated:** [August 2, 2025, 12:58am UTC](https://discourse.vtk.org/t/current-state-of-vtk-js-in-july-2025/15871 "2025-08-02T00:58:07Z")

</div>

Hi, I want to create a react app, using as much browser side functionality as possible. However, it appears that vtk.js still has limitations (see vtk.js overview), thus using react with trame as an iframe seems like th…

---

## [How do I fix non-manifold edges generated by the Dual Contouring / Surface Nets mesh generation algorithms?](https://discourse.vtk.org/t/how-do-i-fix-non-manifold-edges-generated-by-the-dual-contouring-surface-nets-mesh-generation-algorithms/15901)

<div class="topic-metadata">

**Author:** [@MattTheCuber](https://discourse.vtk.org/u/MattTheCuber)\
**Replies:** 1\
**Last updated:** [August 1, 2025, 1:09pm UTC](https://discourse.vtk.org/t/how-do-i-fix-non-manifold-edges-generated-by-the-dual-contouring-surface-nets-mesh-generation-algorithms/15901 "2025-08-01T13:09:50Z")

</div>

Introduction The Dual Contouring / Surface Nets algorithm (specifically the VTK implementation through Pyvista’s contour\_labels method) occasionally generates meshes with non-manifold edges for specific scenarios. We hav…

---

## [vtkCellpicker return original position after rotate actor](https://discourse.vtk.org/t/vtkcellpicker-return-original-position-after-rotate-actor/15894)

<div class="topic-metadata">

**Author:** [@Xu\_Zhang](https://discourse.vtk.org/u/Xu_Zhang)\
**Replies:** 4\
**Last updated:** [August 1, 2025, 6:57am UTC](https://discourse.vtk.org/t/vtkcellpicker-return-original-position-after-rotate-actor/15894 "2025-08-01T06:57:54Z")

</div>

in the CellPicking.py example, I rotate the actor. Now the picked cell is the original one, not the rotated. It seems the polydata of the vtkactor is un-rotated. This is the result of the example, without rotating actor…

---

## [Stitching micro-CT images together](https://discourse.vtk.org/t/stitching-micro-ct-images-together/15826)

<div class="topic-metadata">

**Author:** [@bistek](https://discourse.vtk.org/u/bistek)\
**Replies:** 8\
**Last updated:** [July 30, 2025, 2:01pm UTC](https://discourse.vtk.org/t/stitching-micro-ct-images-together/15826 "2025-07-30T14:01:03Z")

</div>

Hello, we are searching a solution to stitch together 3d image datasets collected with a micro-CT scanner. He images are all collected at the same scale, have some overlap, and are possibly rotated one with respect to t…

---

## [DICOM orientation handling](https://discourse.vtk.org/t/dicom-orientation-handling/15875)

<div class="topic-metadata">

**Author:** [@twilson](https://discourse.vtk.org/u/twilson)\
**Replies:** 3\
**Last updated:** [July 29, 2025, 4:36am UTC](https://discourse.vtk.org/t/dicom-orientation-handling/15875 "2025-07-29T04:36:10Z")

</div>

Apologies for yet another DICOM handling question but couldn’t seem to find the answer to my question. We need to integrate VTK into our existing application which has it own custom loading of the DICOM data, so using v…

---

## [implementing dynamic level of detail for a space curve](https://discourse.vtk.org/t/implementing-dynamic-level-of-detail-for-a-space-curve/15829)

<div class="topic-metadata">

**Author:** [@fdarling](https://discourse.vtk.org/u/fdarling)\
**Replies:** 2\
**Last updated:** [July 28, 2025, 8:46pm UTC](https://discourse.vtk.org/t/implementing-dynamic-level-of-detail-for-a-space-curve/15829 "2025-07-28T20:46:32Z")

</div>

Hello all! I am new to the forums, but I have been playing with VTK with C++/Qt for a few months now. I am quite impressed by the library! I am interested in rendering 3D “space-curves” (lines) that are derived from vec…

---

## [vtkSurfaceNets3D: Order of BoundaryLabels do not seem to reflect direction of triangle normals](https://discourse.vtk.org/t/vtksurfacenets3d-order-of-boundarylabels-do-not-seem-to-reflect-direction-of-triangle-normals/15667)

<div class="topic-metadata">

**Author:** [@Sophonet](https://discourse.vtk.org/u/Sophonet)\
**Replies:** 3\
**Last updated:** [July 28, 2025, 8:17pm UTC](https://discourse.vtk.org/t/vtksurfacenets3d-order-of-boundarylabels-do-not-seem-to-reflect-direction-of-triangle-normals/15667 "2025-07-28T20:17:28Z")

</div>

Hi list, when using vtkSurfaceNets3D recently I have discovered that the BoundaryLabels Scalars correctly include the two numeric labels for the inside/outside areas of the input image, but their order does not seem to …

---

## [Compile error when ling static release config of VRK 9.3.0 via vcpkg](https://discourse.vtk.org/t/compile-error-when-ling-static-release-config-of-vrk-9-3-0-via-vcpkg/15863)

<div class="topic-metadata">

**Author:** [@DimaVed](https://discourse.vtk.org/u/DimaVed)\
**Replies:** 6\
**Last updated:** [July 26, 2025, 8:01am UTC](https://discourse.vtk.org/t/compile-error-when-ling-static-release-config-of-vrk-9-3-0-via-vcpkg/15863 "2025-07-26T08:01:58Z")

</div>

Hi , I try to build c++ project with vtk . OS: windows 10 Package manager : vcpkg Build system: cmake The compiler: MSVC 2022 VTK: version 9.3.0 I can’t build project in release configuration. The error is fol…

[Previous page](https://discourse.vtk.org/c/support/6.md?page=5)

[Next page](https://discourse.vtk.org/c/support/6.md?page=7)