# Support

**URL:** https://discourse.vtk.org/c/support/6.md?page=79

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

**Page:** 80

---

## [Is there a way to index VTK Actors](https://discourse.vtk.org/t/is-there-a-way-to-index-vtk-actors/8183)

<div class="topic-metadata">

**Author:** [@Jishnu](https://discourse.vtk.org/u/Jishnu)\
**Replies:** 0\
**Last updated:** [March 31, 2022, 4:03am UTC](https://discourse.vtk.org/t/is-there-a-way-to-index-vtk-actors/8183 "2022-03-31T04:03:00Z")

</div>

I am developing a simple GUI where users can import multiple stl files and view them and interact with them in real-time. I am using QT (PySide6/PyQt) (TreeView model) for showing the list of stl files imported. Now I st…

---

## [static fucntion DistanceToPolygon not working](https://discourse.vtk.org/t/static-fucntion-distancetopolygon-not-working/8175)

<div class="topic-metadata">

**Author:** [@RAUMIK\_RANA](https://discourse.vtk.org/u/RAUMIK_RANA)\
**Replies:** 1\
**Last updated:** [March 30, 2022, 2:08pm UTC](https://discourse.vtk.org/t/static-fucntion-distancetopolygon-not-working/8175 "2022-03-30T14:08:10Z")

</div>

I tried to find distance between point to polygon with static function “DistanceToPolygon” As per documentation 3rd argument should be points which I assumed list of tuples which contain xyz. https://vtk.org/doc/nightl…

---

## [First time using 3d mode and VTK sdk helps](https://discourse.vtk.org/t/first-time-using-3d-mode-and-vtk-sdk-helps/8178)

<div class="topic-metadata">

**Author:** [@Csanmek](https://discourse.vtk.org/u/Csanmek)\
**Replies:** 0\
**Last updated:** [March 30, 2022, 12:33pm UTC](https://discourse.vtk.org/t/first-time-using-3d-mode-and-vtk-sdk-helps/8178 "2022-03-30T12:33:28Z")

</div>

I was downloaded the VTk sdk to use in unity and went to do a test in play and this message appeared can someone help me find a solution?

---

## [vtkResliceImageViewer display RGBA image](https://discourse.vtk.org/t/vtkresliceimageviewer-display-rgba-image/8174)

<div class="topic-metadata">

**Author:** [@Zhengduo\_Zhu](https://discourse.vtk.org/u/Zhengduo_Zhu)\
**Replies:** 0\
**Last updated:** [March 30, 2022, 7:20am UTC](https://discourse.vtk.org/t/vtkresliceimageviewer-display-rgba-image/8174 "2022-03-30T07:20:05Z")

</div>

Hey guys: How can I let resliceimageviewer display a colored image? I know that vtkResliceImageViewer can setup lookup table. But I need to blend two images after map image to color. I use DICOM reader to read image da…

---

## [Thermograph color map](https://discourse.vtk.org/t/thermograph-color-map/8160)

<div class="topic-metadata">

**Author:** [@hamid\_badi](https://discourse.vtk.org/u/hamid_badi)\
**Replies:** 2\
**Last updated:** [March 29, 2022, 9:45pm UTC](https://discourse.vtk.org/t/thermograph-color-map/8160 "2022-03-29T21:45:45Z")

</div>

Hi, I can’t find a well know thermography colormap (as below) neither in paraview nor in vtk xml file. Does anybody already find/implemented it ? Thanks

---

## [Drawing polys and one verts (vtkOpenGLPolyDataMapper)](https://discourse.vtk.org/t/drawing-polys-and-one-verts-vtkopenglpolydatamapper/8172)

<div class="topic-metadata">

**Author:** [@danay8991](https://discourse.vtk.org/u/danay8991)\
**Replies:** 0\
**Last updated:** [March 29, 2022, 8:47pm UTC](https://discourse.vtk.org/t/drawing-polys-and-one-verts-vtkopenglpolydatamapper/8172 "2022-03-29T20:47:40Z")

</div>

I try draw one polys(4 points) and one verts. After that I have diagonal in this polys. I use vtkopenglpolydatamapper. has anyone had such a problem?

---

## [How to build vtkDicom in Windows10??](https://discourse.vtk.org/t/how-to-build-vtkdicom-in-windows10/8128)

<div class="topic-metadata">

**Author:** [@kookoo9999](https://discourse.vtk.org/u/kookoo9999)\
**Replies:** 11\
**Last updated:** [March 29, 2022, 3:05pm UTC](https://discourse.vtk.org/t/how-to-build-vtkdicom-in-windows10/8128 "2022-03-29T15:05:36Z")

</div>

@dgobbi Hello, I tried to build vtk8.0 with option vtk-module-vtkDicom using gdcm2.8.0(after Cmake build). CMake configure and generate hasn’t error, but all\_build occured error in vtk.sln . Can you explain in detail…

---

## [Cross compiling VTK for Jetson nano with GUISupportQt](https://discourse.vtk.org/t/cross-compiling-vtk-for-jetson-nano-with-guisupportqt/8159)

<div class="topic-metadata">

**Author:** [@Timor](https://discourse.vtk.org/u/Timor)\
**Replies:** 0\
**Last updated:** [March 28, 2022, 9:32pm UTC](https://discourse.vtk.org/t/cross-compiling-vtk-for-jetson-nano-with-guisupportqt/8159 "2022-03-28T21:32:01Z")

</div>

I’m trying to compile vtk for jetson nano and I need to compile it with GUISupportQt I used this tutorial for compiling qt5.15 for the device then I tried to compile vtk with cmake with cmake -D CMAKE\_TOOLCHAIN\_FILE=…

---

## [Advice for Implicit Boolean operations -- jagged edges](https://discourse.vtk.org/t/advice-for-implicit-boolean-operations-jagged-edges/8146)

<div class="topic-metadata">

**Author:** [@BlueKnight7](https://discourse.vtk.org/u/BlueKnight7)\
**Replies:** 1\
**Last updated:** [March 28, 2022, 1:50pm UTC](https://discourse.vtk.org/t/advice-for-implicit-boolean-operations-jagged-edges/8146 "2022-03-28T13:50:29Z")

</div>

I’ve looked at the Ice Cream, Implicit Boolean, and Implicit Boolean examples. All of these examples generate a contour surface from sampling. I’ve noticed from this method that the resulting (final) object does not ha…

---

## [paraview，vtk](https://discourse.vtk.org/t/paraview-vtk/8150)

<div class="topic-metadata">

**Author:** [@chengchengjing](https://discourse.vtk.org/u/chengchengjing)\
**Replies:** 0\
**Last updated:** [March 28, 2022, 1:50am UTC](https://discourse.vtk.org/t/paraview-vtk/8150 "2022-03-28T01:50:10Z")

</div>

In paraview variables, how to call in C++ or python version of VTK?

---

## [Why vtkCubeSource isn't a closed surface?](https://discourse.vtk.org/t/why-vtkcubesource-isnt-a-closed-surface/8143)

<div class="topic-metadata">

**Author:** [@xianger.qi](https://discourse.vtk.org/u/xianger.qi)\
**Replies:** 2\
**Last updated:** [March 28, 2022, 1:38am UTC](https://discourse.vtk.org/t/why-vtkcubesource-isnt-a-closed-surface/8143 "2022-03-28T01:38:16Z")

</div>

Hey All: There are a question why the output of vtkCubeSource isn’t a closed one? I write the codes to indicate my thinking. code below. vtkNew《vtkCubeSource》 cube; auto res = vtkSelectEnclosedPoints::IsSurfaceClosed…

---

## [Program crash with vtk 9.1.0](https://discourse.vtk.org/t/program-crash-with-vtk-9-1-0/8145)

<div class="topic-metadata">

**Author:** [@Daniel](https://discourse.vtk.org/u/Daniel)\
**Replies:** 1\
**Last updated:** [March 27, 2022, 7:33pm UTC](https://discourse.vtk.org/t/program-crash-with-vtk-9-1-0/8145 "2022-03-27T19:33:49Z")

</div>

Hi all, so far I have been working with vtk 8.1.1 and have been able to install and run a (Java) application developed with it on different computers. Now I wanted to switch to vtk 9.1.0. Using CMake, I made the approp…

---

## [Constrained Delaunay2D doesn't cover the whole area](https://discourse.vtk.org/t/constrained-delaunay2d-doesnt-cover-the-whole-area/8132)

<div class="topic-metadata">

**Author:** [@MoonMarcher](https://discourse.vtk.org/u/MoonMarcher)\
**Replies:** 2\
**Last updated:** [March 25, 2022, 1:03pm UTC](https://discourse.vtk.org/t/constrained-delaunay2d-doesnt-cover-the-whole-area/8132 "2022-03-25T13:03:19Z")

</div>

Hello VTK users, I’ve been trying for quite some time to triangulate an area of points with a few polygons which must be hollowed up in the area. I’m using ConstrainedDelaunay2D as the basis of my implementation but the…

---

## [vtkSelectvisiblePoints selects unvisible points](https://discourse.vtk.org/t/vtkselectvisiblepoints-selects-unvisible-points/8120)

<div class="topic-metadata">

**Author:** [@csad6517](https://discourse.vtk.org/u/csad6517)\
**Replies:** 4\
**Last updated:** [March 23, 2022, 6:34pm UTC](https://discourse.vtk.org/t/vtkselectvisiblepoints-selects-unvisible-points/8120 "2022-03-23T18:34:10Z")

</div>

Hello, I am using vtkSelectVisiblePoints to get the number of visible points on my 3d volume, which is generated through vtkVolume and represented in a rendered scene. If I threshold the volume and want to know the num…

---

## [QVTKWidget Shows Transparent Plane](https://discourse.vtk.org/t/qvtkwidget-shows-transparent-plane/8130)

<div class="topic-metadata">

**Author:** [@Panda12197](https://discourse.vtk.org/u/Panda12197)\
**Replies:** 0\
**Last updated:** [March 24, 2022, 4:19am UTC](https://discourse.vtk.org/t/qvtkwidget-shows-transparent-plane/8130 "2022-03-24T04:19:01Z")

</div>

Hello Guys, I try this Example to visualize the Point Cloud. But when I run the code, QVTKWidget becomes like this image. QVTKWidget is transparent and can see background desktop screen at the place of widget. I also tr…

---

## [Threshold from vtk image data](https://discourse.vtk.org/t/threshold-from-vtk-image-data/8126)

<div class="topic-metadata">

**Author:** [@Nige\_Terminator](https://discourse.vtk.org/u/Nige_Terminator)\
**Replies:** 0\
**Last updated:** [March 23, 2022, 6:24pm UTC](https://discourse.vtk.org/t/threshold-from-vtk-image-data/8126 "2022-03-23T18:24:50Z")

</div>

I everyone I just approach vtk in python for my master thesis I import a file.nii.gz from segmentation obtain through mri. Then I read it through vtkNIFTIImageReader and with get output I obtain a Vtk image data file N…

---

## [Implicit Quadric model with Perlin or other noise applied](https://discourse.vtk.org/t/implicit-quadric-model-with-perlin-or-other-noise-applied/8115)

<div class="topic-metadata">

**Author:** [@Spacetracker](https://discourse.vtk.org/u/Spacetracker)\
**Replies:** 3\
**Last updated:** [March 23, 2022, 3:04pm UTC](https://discourse.vtk.org/t/implicit-quadric-model-with-perlin-or-other-noise-applied/8115 "2022-03-23T15:04:05Z")

</div>

I create a complex implicit surface model with quadric function boolean combinations. I want to perturb or filter these individual smooth surfaces to make them bumpy or irregular with the Perlin function or something li…

---

## [VTK 9 and vtkResliceCursorWidget](https://discourse.vtk.org/t/vtk-9-and-vtkreslicecursorwidget/4114)

<div class="topic-metadata">

**Author:** [@TheRalph](https://discourse.vtk.org/u/TheRalph)\
**Replies:** 6\
**Last updated:** [March 23, 2022, 7:09am UTC](https://discourse.vtk.org/t/vtk-9-and-vtkreslicecursorwidget/4114 "2022-03-23T07:09:36Z")

</div>

Hi, I built a vtk v9.0 Linux debian package with the 27th August 2020 nightly release of the master branch of vtk in order to test the last features before the 9.1 planned to the end of october. Unfortunatly, I experim…

---

## [how to set defualt value for vtkProbeFilter?](https://discourse.vtk.org/t/how-to-set-defualt-value-for-vtkprobefilter/8116)

<div class="topic-metadata">

**Author:** [@WailmerPail](https://discourse.vtk.org/u/WailmerPail)\
**Replies:** 0\
**Last updated:** [March 23, 2022, 6:03am UTC](https://discourse.vtk.org/t/how-to-set-defualt-value-for-vtkprobefilter/8116 "2022-03-23T06:03:25Z")

</div>

Hi, teams I am confused with ‘setting default value for vtkProbeFilter’, can anyone tell me how to do that? Besides, there is a class named vtkImageProbeFilter in documents, which version have this class and I found th…

---

## [Segmentation fault in Visualizer demo](https://discourse.vtk.org/t/segmentation-fault-in-visualizer-demo/8112)

<div class="topic-metadata">

**Author:** [@bala4krish](https://discourse.vtk.org/u/bala4krish)\
**Replies:** 0\
**Last updated:** [March 22, 2022, 6:43pm UTC](https://discourse.vtk.org/t/segmentation-fault-in-visualizer-demo/8112 "2022-03-22T18:43:08Z")

</div>

Hello, I am new to using VTK. Sorry if this very basic question. But I am unable to proceed with my own project. Can someone please help fix this? I installed the libvtk7-qt-dev using the linux apt. My requirement is t…

---

## [How to convert vtkPolyData to image coordinates?](https://discourse.vtk.org/t/how-to-convert-vtkpolydata-to-image-coordinates/8108)

<div class="topic-metadata">

**Author:** [@lbrandao](https://discourse.vtk.org/u/lbrandao)\
**Replies:** 1\
**Last updated:** [March 22, 2022, 6:32pm UTC](https://discourse.vtk.org/t/how-to-convert-vtkpolydata-to-image-coordinates/8108 "2022-03-22T18:32:36Z")

</div>

Dear All, I have a vtkPolyData file (extension.vtk) with 12 points: These points are the annotation of a 3D image data (more exactly, a multi-slice DICOM image - one folder with 14 slices/frames .dcm). I need to co…

---

## [vtkWriter to memory](https://discourse.vtk.org/t/vtkwriter-to-memory/8087)

<div class="topic-metadata">

**Author:** [@whophil](https://discourse.vtk.org/u/whophil)\
**Replies:** 5\
**Last updated:** [March 21, 2022, 10:13pm UTC](https://discourse.vtk.org/t/vtkwriter-to-memory/8087 "2022-03-21T22:13:34Z")

</div>

Occasionally I want to use a vtkWriter to write to memory instead of disk. The docs offer this teaser: vtkWriter is an abstract class for mapper objects that write their data to disk (or into a communications port) I…

---

## [Problem running SimpleRayCast.py example](https://discourse.vtk.org/t/problem-running-simpleraycast-py-example/8092)

<div class="topic-metadata">

**Author:** [@Arni](https://discourse.vtk.org/u/Arni)\
**Replies:** 2\
**Last updated:** [March 21, 2022, 8:19am UTC](https://discourse.vtk.org/t/problem-running-simpleraycast-py-example/8092 "2022-03-21T08:19:34Z")

</div>

Hello. I am trying to learn vtk but I am having problems running some of the examples. I tried some basic examples and they were working fine, but some examples that require a filename argument gave me problems. Specific…

---

## [odb file](https://discourse.vtk.org/t/odb-file/8048)

<div class="topic-metadata">

**Author:** [@chengchengjing](https://discourse.vtk.org/u/chengchengjing)\
**Replies:** 2\
**Last updated:** [March 21, 2022, 2:20am UTC](https://discourse.vtk.org/t/odb-file/8048 "2022-03-21T02:20:47Z")

</div>

how to get vtk file from odb file?

---

## [Cascade appanding -TopoDS\_Shape- to -vtkAppendPolyData- or -vtkCleanPolyData- or simply convert -TopoDS\_Shape- to -vtkPolyData- NOT WORKING](https://discourse.vtk.org/t/cascade-appanding-topods-shape-to-vtkappendpolydata-or-vtkcleanpolydata-or-simply-convert-topods-shape-to-vtkpolydata-not-working/7967)

<div class="topic-metadata">

**Author:** [@anon41080341](https://discourse.vtk.org/u/anon41080341)\
**Replies:** 3\
**Last updated:** [March 19, 2022, 3:46pm UTC](https://discourse.vtk.org/t/cascade-appanding-topods-shape-to-vtkappendpolydata-or-vtkcleanpolydata-or-simply-convert-topods-shape-to-vtkpolydata-not-working/7967 "2022-03-19T15:46:04Z")

</div>

//Dear OCC VTK stuff //In short, The problem is, I cannot append TopoDS\_Shape to vtkAppendPolyData nor to vtkCleanPolyData. //I cant even convert TopoDS\_Shape to vtkPolyData. //If you run this simple example, this is …

---

## [How to download VTK 9.0.0, there are only 9.1.0](https://discourse.vtk.org/t/how-to-download-vtk-9-0-0-there-are-only-9-1-0/8040)

<div class="topic-metadata">

**Author:** [@linbeijianbaoxia](https://discourse.vtk.org/u/linbeijianbaoxia)\
**Replies:** 5\
**Last updated:** [March 19, 2022, 5:08am UTC](https://discourse.vtk.org/t/how-to-download-vtk-9-0-0-there-are-only-9-1-0/8040 "2022-03-19T05:08:32Z")

</div>

The 9.1.0 maybe have some error when I recompile OCCT, so I try to use 9.0.0, but I can’t find it.

---

## [Can't build VTK sample project: Missing module](https://discourse.vtk.org/t/cant-build-vtk-sample-project-missing-module/8056)

<div class="topic-metadata">

**Author:** [@Ilmu011](https://discourse.vtk.org/u/Ilmu011)\
**Replies:** 28\
**Last updated:** [March 18, 2022, 9:05pm UTC](https://discourse.vtk.org/t/cant-build-vtk-sample-project-missing-module/8056 "2022-03-18T21:05:11Z")

</div>

I am trying to build the CylinderExample with VTK. I am on ubuntu 20.04 LTS and installed VTK with vcpkg. The project is built with CMake. However, the CMake initialization command fails: Skipping CylinderExample: Coul…

---

## [FourPaneViewer example misses testcase](https://discourse.vtk.org/t/fourpaneviewer-example-misses-testcase/7849)

<div class="topic-metadata">

**Author:** [@pettaa123](https://discourse.vtk.org/u/pettaa123)\
**Replies:** 5\
**Last updated:** [March 18, 2022, 2:44pm UTC](https://discourse.vtk.org/t/fourpaneviewer-example-misses-testcase/7849 "2022-03-18T14:44:47Z")

</div>

Since there is no test case specified for FourPaneViewer example and I have some failed tests,I dont know if my self compiled code is faulty or my input is wrong. LastTest.log: Running test command: "C:/Program Files/C…

---

## [vtkPlanes is empty when using GetPlanes](https://discourse.vtk.org/t/vtkplanes-is-empty-when-using-getplanes/6662)

<div class="topic-metadata">

**Author:** [@AhmedAlshawi](https://discourse.vtk.org/u/AhmedAlshawi)\
**Replies:** 2\
**Last updated:** [March 18, 2022, 1:42pm UTC](https://discourse.vtk.org/t/vtkplanes-is-empty-when-using-getplanes/6662 "2022-03-18T13:42:05Z")

</div>

Hi. I am trying to use vtkBoxWidget2 to clip an unstructured grid. Within my vtkBoxCallback, I initiate the planes variable and then grab the planes from the vtkBoxRepresentation. However, the planes variable is always …

---

## [where can we download the example test data](https://discourse.vtk.org/t/where-can-we-download-the-example-test-data/8079)

<div class="topic-metadata">

**Author:** [@longjiang321](https://discourse.vtk.org/u/longjiang321)\
**Replies:** 2\
**Last updated:** [March 18, 2022, 12:50pm UTC](https://discourse.vtk.org/t/where-can-we-download-the-example-test-data/8079 "2022-03-18T12:50:21Z")

</div>

hi friends: I am a fresher of VTK, I am trying to learn the examples provided officely one by one, but It is realy a greate challenge for me to get the test data like .vtp, .vti, .ply, .mha…, I think this is a common …

[Previous page](https://discourse.vtk.org/c/support/6.md?page=78)

[Next page](https://discourse.vtk.org/c/support/6.md?page=80)