# Support

**URL:** https://discourse.vtk.org/c/support/6.md?page=89

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

**Page:** 90

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## [Some problems when configuring VTK](https://discourse.vtk.org/t/some-problems-when-configuring-vtk/7292)

<div class="topic-metadata">

**Author:** [@WDD](https://discourse.vtk.org/u/WDD)\
**Replies:** 1\
**Last updated:** [November 29, 2021, 9:36am UTC](https://discourse.vtk.org/t/some-problems-when-configuring-vtk/7292 "2021-11-29T09:36:17Z")

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I meet some problems when configuring VTK .I am a new designer so I want to get some help.I complied VTK in Ubuntu21.10 .An error occurred when compiling to 99% with make.It shows that there are many libraries undefined(…

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## [VtkLibrary upgrade](https://discourse.vtk.org/t/vtklibrary-upgrade/7262)

<div class="topic-metadata">

**Author:** [@Taimour](https://discourse.vtk.org/u/Taimour)\
**Replies:** 8\
**Last updated:** [November 29, 2021, 8:59am UTC](https://discourse.vtk.org/t/vtklibrary-upgrade/7262 "2021-11-29T08:59:43Z")

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Hi, I was previously using vtk 5.80 version. I replaced the header files and modified my code and replaced the library files. I want to know Will it work same with this modificaion?

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## [Composite rendering function](https://discourse.vtk.org/t/composite-rendering-function/7284)

<div class="topic-metadata">

**Author:** [@Wenhui-person](https://discourse.vtk.org/u/Wenhui-person)\
**Replies:** 1\
**Last updated:** [November 29, 2021, 8:58am UTC](https://discourse.vtk.org/t/composite-rendering-function/7284 "2021-11-29T08:58:15Z")

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In the latest version of VTK, which is the composite rendering function?

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## [Interpolate points in a given mesh from DVF image volume](https://discourse.vtk.org/t/interpolate-points-in-a-given-mesh-from-dvf-image-volume/6973)

<div class="topic-metadata">

**Author:** [@isuruwi](https://discourse.vtk.org/u/isuruwi)\
**Replies:** 3\
**Last updated:** [November 28, 2021, 6:23pm UTC](https://discourse.vtk.org/t/interpolate-points-in-a-given-mesh-from-dvf-image-volume/6973 "2021-11-28T18:23:59Z")

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I have generated a volumetric mesh and saved it as a vtkUnstrcturedGrid (i.e. a .vtk file). Now what I want is that I need to deform it according to the deforamtion vector field stored in nifti format. The dimension of t…

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## [3D reconstruction of BMP image sequence](https://discourse.vtk.org/t/3d-reconstruction-of-bmp-image-sequence/7290)

<div class="topic-metadata">

**Author:** [@Wenhui-person](https://discourse.vtk.org/u/Wenhui-person)\
**Replies:** 0\
**Last updated:** [November 28, 2021, 2:32am UTC](https://discourse.vtk.org/t/3d-reconstruction-of-bmp-image-sequence/7290 "2021-11-28T02:32:50Z")

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In the VTK 3D reconstruction surface rendering method, the required obj format file is exported, but it is found that there are no surface elements in the obj file. What should I do?

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## [How to change interactor of QQuickVTKRenderWindow?](https://discourse.vtk.org/t/how-to-change-interactor-of-qquickvtkrenderwindow/7289)

<div class="topic-metadata">

**Author:** [@tmnku](https://discourse.vtk.org/u/tmnku)\
**Replies:** 0\
**Last updated:** [November 26, 2021, 5:16pm UTC](https://discourse.vtk.org/t/how-to-change-interactor-of-qquickvtkrenderwindow/7289 "2021-11-26T17:16:26Z")

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Hi, I’m new to the forum. I’m currently working on a project with Qt 5.12 and VTK 9.1 in which I want to use a custom interactorStyle. In my qml I have VTKRenderWindow { id: vtkwindow width: 400 height: 40…

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## [Is there a VTK installer available for Windows 10 (64-bit)?](https://discourse.vtk.org/t/is-there-a-vtk-installer-available-for-windows-10-64-bit/7286)

<div class="topic-metadata">

**Author:** [@hegde](https://discourse.vtk.org/u/hegde)\
**Replies:** 1\
**Last updated:** [November 26, 2021, 4:28pm UTC](https://discourse.vtk.org/t/is-there-a-vtk-installer-available-for-windows-10-64-bit/7286 "2021-11-26T16:28:05Z")

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Hi, I’ve been trying without success to install vtk on my Windows computer. Regardless of what I try (different versions of vtk and different compilers, etc), I get a whole host of errors. I’m not sure it’s worth it for…

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## [Volume Raycasting](https://discourse.vtk.org/t/volume-raycasting/7280)

<div class="topic-metadata">

**Author:** [@Wenhui-person](https://discourse.vtk.org/u/Wenhui-person)\
**Replies:** 2\
**Last updated:** [November 26, 2021, 10:47am UTC](https://discourse.vtk.org/t/volume-raycasting/7280 "2021-11-26T10:47:45Z")

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An alternative to vtkVolumeRayCastCompositeFunction in the latest version.

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## [vtkProbeFilter or vtkImageReslice question](https://discourse.vtk.org/t/vtkprobefilter-or-vtkimagereslice-question/7270)

<div class="topic-metadata">

**Author:** [@GloriaArienti](https://discourse.vtk.org/u/GloriaArienti)\
**Replies:** 1\
**Last updated:** [November 26, 2021, 2:56am UTC](https://discourse.vtk.org/t/vtkprobefilter-or-vtkimagereslice-question/7270 "2021-11-26T02:56:35Z")

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Hello, we are trying to extract an oblique cross-section across a 3D image, i.e. a 2D image extracted from the colored volume in image below, oriented as the plane (a vtkPlane) highlighted in white. We have tried in …

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## [VTK 9.1 release timing?](https://discourse.vtk.org/t/vtk-9-1-release-timing/6391)

<div class="topic-metadata">

**Author:** [@Dave\_DeMarle](https://discourse.vtk.org/u/Dave_DeMarle)\
**Replies:** 2\
**Last updated:** [November 25, 2021, 1:20pm UTC](https://discourse.vtk.org/t/vtk-9-1-release-timing/6391 "2021-11-25T13:20:37Z")

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Hello, When will the next VTK release happen and will it be tagged 9.1 or something else? Asking for a friend, thanks! Dave

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## [Is it possible to integrate VTKExtensions in Paraview to VTK?](https://discourse.vtk.org/t/is-it-possible-to-integrate-vtkextensions-in-paraview-to-vtk/7266)

<div class="topic-metadata">

**Author:** [@rockydut](https://discourse.vtk.org/u/rockydut)\
**Replies:** 3\
**Last updated:** [November 25, 2021, 9:15am UTC](https://discourse.vtk.org/t/is-it-possible-to-integrate-vtkextensions-in-paraview-to-vtk/7266 "2021-11-25T09:15:44Z")

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There are many useful functions in VTKExtensions in ParaView. So, it is possible to integrate this package to VTK?

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## [Does a Python "reader" need to be closed?](https://discourse.vtk.org/t/does-a-python-reader-need-to-be-closed/7261)

<div class="topic-metadata">

**Author:** [@GregVernon](https://discourse.vtk.org/u/GregVernon)\
**Replies:** 2\
**Last updated:** [November 24, 2021, 5:42pm UTC](https://discourse.vtk.org/t/does-a-python-reader-need-to-be-closed/7261 "2021-11-24T17:42:07Z")

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I’m writing a Python script to serve as the black-box simulation interface driver for a DAKOTA project. Essentially, this Python driver generates a simulation model, submits a solver subprocess which creates a new .vtu …

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## [Punching a polygonal hole into a triangulated surface](https://discourse.vtk.org/t/punching-a-polygonal-hole-into-a-triangulated-surface/7061)

<div class="topic-metadata">

**Author:** [@cobo](https://discourse.vtk.org/u/cobo)\
**Replies:** 42\
**Last updated:** [November 24, 2021, 3:00pm UTC](https://discourse.vtk.org/t/punching-a-polygonal-hole-into-a-triangulated-surface/7061 "2021-11-24T15:00:56Z")

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I have a triangulated surface (a “2.5D” topo surface actually), only triangles, and a closed polygon, and with that polygon I want to “punch” a hole into that triangulated topo surface. From my understanding, this should…

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## [VTK clip: How to clip with cell as the minimum unit](https://discourse.vtk.org/t/vtk-clip-how-to-clip-with-cell-as-the-minimum-unit/7166)

<div class="topic-metadata">

**Author:** [@rockydut](https://discourse.vtk.org/u/rockydut)\
**Replies:** 3\
**Last updated:** [November 24, 2021, 12:54pm UTC](https://discourse.vtk.org/t/vtk-clip-how-to-clip-with-cell-as-the-minimum-unit/7166 "2021-11-24T12:54:34Z")

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I want to clip the model (for finite element simulation). However, the existing clipping methods triangulate the cell. In other word, for a cell, it is either cut or not cut, rather than cutting a part of a cell and tri…

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## [VTK 9.1 tests failing on Alpine Linux](https://discourse.vtk.org/t/vtk-9-1-tests-failing-on-alpine-linux/7250)

<div class="topic-metadata">

**Author:** [@boomanaiden154](https://discourse.vtk.org/u/boomanaiden154)\
**Replies:** 3\
**Last updated:** [November 24, 2021, 1:02am UTC](https://discourse.vtk.org/t/vtk-9-1-tests-failing-on-alpine-linux/7250 "2021-11-24T01:02:22Z")

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When compiling and running the tests for VTK 9.1 on Alpine Linux, there are about 20 tests that fail, and they are the following: 230 - VTK::IOImportCxx-OBJImport-MixedOrder1 (Failed) 232 - VTK::IOImportCxx-OBJImport-MT…

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## [Downsampling a 3D image by 2 in all dimensions](https://discourse.vtk.org/t/downsampling-a-3d-image-by-2-in-all-dimensions/7255)

<div class="topic-metadata">

**Author:** [@Luis\_Carlos\_Carneiro](https://discourse.vtk.org/u/Luis_Carlos_Carneiro)\
**Replies:** 1\
**Last updated:** [November 23, 2021, 2:23pm UTC](https://discourse.vtk.org/t/downsampling-a-3d-image-by-2-in-all-dimensions/7255 "2021-11-23T14:23:10Z")

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Dear All, I want to downsample a MHD (3D, RGB) image by 2 in all dimensions. But because the image is a surface the resulting image is sparse. Has VTK some function to do that with some king of filter (Raised Cosine (??…

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## [Writing ugrid Xdmf3 a time step at a time](https://discourse.vtk.org/t/writing-ugrid-xdmf3-a-time-step-at-a-time/7230)

<div class="topic-metadata">

**Author:** [@olafx](https://discourse.vtk.org/u/olafx)\
**Replies:** 1\
**Last updated:** [November 22, 2021, 10:39pm UTC](https://discourse.vtk.org/t/writing-ugrid-xdmf3-a-time-step-at-a-time/7230 "2021-11-22T22:39:23Z")

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I’m trying to write to a Xdmf3 file (with vtkUnstructuredGrid data) over time, and not all at once. I’ve read the vtkTimeSourceExample source, some of the vtkXdmf3Writer source, and some examples of related usage, but st…

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## [How can I click one end of a line to drag, while the other end does not move.and the shape of the line segment is a catenary?](https://discourse.vtk.org/t/how-can-i-click-one-end-of-a-line-to-drag-while-the-other-end-does-not-move-and-the-shape-of-the-line-segment-is-a-catenary/7235)

<div class="topic-metadata">

**Author:** [@szdxhwz](https://discourse.vtk.org/u/szdxhwz)\
**Replies:** 2\
**Last updated:** [November 22, 2021, 7:47am UTC](https://discourse.vtk.org/t/how-can-i-click-one-end-of-a-line-to-drag-while-the-other-end-does-not-move-and-the-shape-of-the-line-segment-is-a-catenary/7235 "2021-11-22T07:47:18Z")

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Hello, I am a novice, please advise. I’m working on a project. Click one end of a line to drag, while the other end is not moving, and the shape of the line segment is a catenary. May I ask if you have any suggestions or…

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## [Question about the cases table of the marching cube](https://discourse.vtk.org/t/question-about-the-cases-table-of-the-marching-cube/7232)

<div class="topic-metadata">

**Author:** [@1116](https://discourse.vtk.org/u/1116)\
**Replies:** 1\
**Last updated:** [November 21, 2021, 11:30am UTC](https://discourse.vtk.org/t/question-about-the-cases-table-of-the-marching-cube/7232 "2021-11-21T11:30:58Z")

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Hello, There is a question regarding the cases table used in the marching cube algorithm. This file (VTK/vtkMarchingCubesTriangleCases.cxx at master · Kitware/VTK · GitHub) list all 256 cases. I’m wondering why each cas…

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## [Resample a Mesh for added complexity](https://discourse.vtk.org/t/resample-a-mesh-for-added-complexity/7228)

<div class="topic-metadata">

**Author:** [@Steven\_Lewis](https://discourse.vtk.org/u/Steven_Lewis)\
**Replies:** 1\
**Last updated:** [November 20, 2021, 1:12am UTC](https://discourse.vtk.org/t/resample-a-mesh-for-added-complexity/7228 "2021-11-20T01:12:28Z")

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Hi, I was wondering if there was a method by which you can resample a surface mesh with a set number of points to a higher complexity given the number of points of another model? I have seen other programs use a similar …

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## [Does a vtkMultiBlockDataSet own a copy of its blocks in Python?](https://discourse.vtk.org/t/does-a-vtkmultiblockdataset-own-a-copy-of-its-blocks-in-python/7219)

<div class="topic-metadata">

**Author:** [@adeak](https://discourse.vtk.org/u/adeak)\
**Replies:** 0\
**Last updated:** [November 18, 2021, 11:21pm UTC](https://discourse.vtk.org/t/does-a-vtkmultiblockdataset-own-a-copy-of-its-blocks-in-python/7219 "2021-11-18T23:21:27Z")

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Hello, I’ve been wondering about the data model of a multiblock dataset using the Python API. Using a simplified version of this example: import weakref from vtkmodules.vtkCommonDataModel import vtkMultiBlockDataSet fr…

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## [Events in web-project-templates-master](https://discourse.vtk.org/t/events-in-web-project-templates-master/7210)

<div class="topic-metadata">

**Author:** [@Luis\_Carlos\_Carneiro](https://discourse.vtk.org/u/Luis_Carlos_Carneiro)\
**Replies:** 6\
**Last updated:** [November 18, 2021, 5:50pm UTC](https://discourse.vtk.org/t/events-in-web-project-templates-master/7210 "2021-11-18T17:50:28Z")

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Dear All, In web-project-templates-master example what the following instructions do? self.getApplication().InvokeEvent(‘StartInteractionEvent’) self.getApplication().InvokeEvent(‘EndInteractionEvent’) self.getApplic…

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## [How to perform perspective projection using VTK (Python)?](https://discourse.vtk.org/t/how-to-perform-perspective-projection-using-vtk-python/7213)

<div class="topic-metadata">

**Author:** [@user\_42](https://discourse.vtk.org/u/user_42)\
**Replies:** 0\
**Last updated:** [November 18, 2021, 4:43pm UTC](https://discourse.vtk.org/t/how-to-perform-perspective-projection-using-vtk-python/7213 "2021-11-18T16:43:00Z")

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I found an example for perspective projection using C++ here, is there an equivalent Python example/can someone guide me in the right direction on how to get started with this? I want to be able to project a 3D volume.

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## [Numpy 3D array into VTK data types for volume rendering?](https://discourse.vtk.org/t/numpy-3d-array-into-vtk-data-types-for-volume-rendering/3455)

<div class="topic-metadata">

**Author:** [@Gresliebear](https://discourse.vtk.org/u/Gresliebear)\
**Replies:** 15\
**Last updated:** [November 18, 2021, 4:40pm UTC](https://discourse.vtk.org/t/numpy-3d-array-into-vtk-data-types-for-volume-rendering/3455 "2021-11-18T16:40:55Z")

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Hi, everyone I am attempting to convert 3D numpy array into volume rendering function in pythonVTK or C++ code of VTK. Data type conversion of numpy array data into 3D volumes is an issue for me, I cant seem to find an a…

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## [Faster Rendering of vtkpoly](https://discourse.vtk.org/t/faster-rendering-of-vtkpoly/7162)

<div class="topic-metadata">

**Author:** [@BastianJuelich](https://discourse.vtk.org/u/BastianJuelich)\
**Replies:** 5\
**Last updated:** [November 18, 2021, 2:31pm UTC](https://discourse.vtk.org/t/faster-rendering-of-vtkpoly/7162 "2021-11-18T14:31:49Z")

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Hey all, i am visualizing sensordata (x,y,z,sensorvalue) with a python vtk app. When Rendering more then 10 million “Points” it gets very laggy. Also when zooming out this is getting worse. Is there a way to improve …

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## [Errors migrating VS Solution to VTK 9.1.0 (windows)](https://discourse.vtk.org/t/errors-migrating-vs-solution-to-vtk-9-1-0-windows/7205)

<div class="topic-metadata">

**Author:** [@CharInt0](https://discourse.vtk.org/u/CharInt0)\
**Replies:** 2\
**Last updated:** [November 18, 2021, 7:40am UTC](https://discourse.vtk.org/t/errors-migrating-vs-solution-to-vtk-9-1-0-windows/7205 "2021-11-18T07:40:49Z")

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Hi all, I downloaded and successfully built VTK 9.1.0 on Windows 10. Then I tried to update a working Win C++ Visual Studio 2019 .dll project which links to the older vtk 9.0.3. I had a few compilation problems: “…Co…

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## [Is it possible to rotate an object in real time using a method other than clicking on the screen?](https://discourse.vtk.org/t/is-it-possible-to-rotate-an-object-in-real-time-using-a-method-other-than-clicking-on-the-screen/7079)

<div class="topic-metadata">

**Author:** [@riki](https://discourse.vtk.org/u/riki)\
**Replies:** 3\
**Last updated:** [November 18, 2021, 1:50am UTC](https://discourse.vtk.org/t/is-it-possible-to-rotate-an-object-in-real-time-using-a-method-other-than-clicking-on-the-screen/7079 "2021-11-18T01:50:40Z")

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I started using VTK the other day, and now I’m mainly working on the code for the tutorial. I would like to use VTK to rotate an object by specifying the rotation angle from the GUI, or to read the sensor value and rota…

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## [vtkPoissonReconstruction Java Wrapper](https://discourse.vtk.org/t/vtkpoissonreconstruction-java-wrapper/7150)

<div class="topic-metadata">

**Author:** [@thomasw](https://discourse.vtk.org/u/thomasw)\
**Replies:** 5\
**Last updated:** [November 18, 2021, 12:53am UTC](https://discourse.vtk.org/t/vtkpoissonreconstruction-java-wrapper/7150 "2021-11-18T00:53:44Z")

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Hi, I compiled successfully VTK 9.1 with Java-Wrappers and module vtkPoissonReconstruction switched on using ninja running Windows 10 and VC2019. But it only produces a PoissonReconstructionModule.java in \[build-dir\]/W…

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## [writing PointData to UnstructuredGrid (and Xdmf time series)](https://discourse.vtk.org/t/writing-pointdata-to-unstructuredgrid-and-xdmf-time-series/7201)

<div class="topic-metadata">

**Author:** [@olafx](https://discourse.vtk.org/u/olafx)\
**Replies:** 2\
**Last updated:** [November 17, 2021, 4:09pm UTC](https://discourse.vtk.org/t/writing-pointdata-to-unstructuredgrid-and-xdmf-time-series/7201 "2021-11-17T16:09:53Z")

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I’m trying to write only Points and PointData to an UnstructuredGrid type. I can’t find any examples on how to do this so having difficulties figuring it out, but I think I’m 90% of the way there I think. My points wor…

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## [Building VTK for Mac M1+ARM : Undefined symbols: \_JAWT\_GetAWT](https://discourse.vtk.org/t/building-vtk-for-mac-m1-arm-undefined-symbols-jawt-getawt/7181)

<div class="topic-metadata">

**Author:** [@Martin3d](https://discourse.vtk.org/u/Martin3d)\
**Replies:** 12\
**Last updated:** [November 17, 2021, 11:18am UTC](https://discourse.vtk.org/t/building-vtk-for-mac-m1-arm-undefined-symbols-jawt-getawt/7181 "2021-11-17T11:18:25Z")

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Hi, I am trying to build VTK 9.1.0-rc2 on a Mac M1 with an ARM64. I am blocked at \[ 38%\] Linking CXX shared library ../../lib/java/vtk-Darwin-arm64/libvtkRenderingCoreJava.jnilib Undefined symbols for architecture arm6…

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