# Latest

**URL:** https://discourse.vtk.org/latest.md?page=120

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

**Page:** 121

---

## [How to set url header for reader - VtkJs](https://discourse.vtk.org/t/how-to-set-url-header-for-reader-vtkjs/9194)

<div class="topic-metadata">

**Author:** [@zeNn-G](https://discourse.vtk.org/u/zeNn-G)\
**Replies:** 3\
**Last updated:** [August 24, 2022, 2:58pm UTC](https://discourse.vtk.org/t/how-to-set-url-header-for-reader-vtkjs/9194 "2022-08-24T14:58:23Z")

</div>

I need to set a Auth header in vtkPolyDataReader. How can i do it ?

---

## [About how to run Wrapping Example](https://discourse.vtk.org/t/about-how-to-run-wrapping-example/9034)

<div class="topic-metadata">

**Author:** [@JessonWu](https://discourse.vtk.org/u/JessonWu)\
**Replies:** 1\
**Last updated:** [August 24, 2022, 1:15pm UTC](https://discourse.vtk.org/t/about-how-to-run-wrapping-example/9034 "2022-08-24T13:15:16Z")

</div>

Hello I am just new to VTK. I am trying to build and run the Wrapping Example. I can compile and get the files “vtkWrappable.so” and “libvtkWrappable.so” built, but failed to run the test script “import\_wrappable.py”: …

---

## [Hide/Show (Minimize/Maximize) vtkRenderer](https://discourse.vtk.org/t/hide-show-minimize-maximize-vtkrenderer/9190)

<div class="topic-metadata">

**Author:** [@BJladika](https://discourse.vtk.org/u/BJladika)\
**Replies:** 1\
**Last updated:** [August 23, 2022, 8:11pm UTC](https://discourse.vtk.org/t/hide-show-minimize-maximize-vtkrenderer/9190 "2022-08-23T20:11:04Z")

</div>

Hello, I have this piece of code, which puts 4 vtkRenderers in 1 Window, which are separated (aka 4 screens in 1 window). And I wanted to make feature of Maximize/Minimizing each screen, and thats where I’ve stuck. I th…

---

## [Reader for ITK transforms?](https://discourse.vtk.org/t/reader-for-itk-transforms/9201)

<div class="topic-metadata">

**Author:** [@Gabriel\_Devenyi](https://discourse.vtk.org/u/Gabriel_Devenyi)\
**Replies:** 0\
**Last updated:** [August 23, 2022, 7:24pm UTC](https://discourse.vtk.org/t/reader-for-itk-transforms/9201 "2022-08-23T19:24:39Z")

</div>

Is there a vtk reader for ITK transforms? Right now I’m having to manually deconstruct and insert the matrix values from an ITK function into VTK.

---

## [How to disable interpolation (bluring image) in vtkResliceCursorWidget?](https://discourse.vtk.org/t/how-to-disable-interpolation-bluring-image-in-vtkreslicecursorwidget/9191)

<div class="topic-metadata">

**Author:** [@BJladika](https://discourse.vtk.org/u/BJladika)\
**Replies:** 1\
**Last updated:** [August 23, 2022, 6:59pm UTC](https://discourse.vtk.org/t/how-to-disable-interpolation-bluring-image-in-vtkreslicecursorwidget/9191 "2022-08-23T18:59:13Z")

</div>

Hello, as I’ve previously written in other topic, I’ve found that piece of code of running Multi Planar Reconstruction via vtkResliceCursorWidget and I wanted to run it, but it shows images blurred (can’t see raw pixels)…

---

## [Controlling setAttribute value of min and max of vtkPlane viewer doesn't shows the MRI brain images?](https://discourse.vtk.org/t/controlling-setattribute-value-of-min-and-max-of-vtkplane-viewer-doesnt-shows-the-mri-brain-images/9074)

<div class="topic-metadata">

**Author:** [@Yuvi-416](https://discourse.vtk.org/u/Yuvi-416)\
**Replies:** 10\
**Last updated:** [August 23, 2022, 12:58pm UTC](https://discourse.vtk.org/t/controlling-setattribute-value-of-min-and-max-of-vtkplane-viewer-doesnt-shows-the-mri-brain-images/9074 "2022-08-23T12:58:42Z")

</div>

Hello everyone, I am using the clipping features of VTK.js to clip the desired view of the volume rendering screen. It works very well for microscope image data as the image has an origin (0, 0, 0), however the same be…

---

## [vtkShadowMapPass causes actor picking doesn't work,and the actors with vtkUnstructuredGrid source don't show anymore](https://discourse.vtk.org/t/vtkshadowmappass-causes-actor-picking-doesnt-work-and-the-actors-with-vtkunstructuredgrid-source-dont-show-anymore/9197)

<div class="topic-metadata">

**Author:** [@AlexLuya](https://discourse.vtk.org/u/AlexLuya)\
**Replies:** 0\
**Last updated:** [August 23, 2022, 9:39am UTC](https://discourse.vtk.org/t/vtkshadowmappass-causes-actor-picking-doesnt-work-and-the-actors-with-vtkunstructuredgrid-source-dont-show-anymore/9197 "2022-08-23T09:39:49Z")

</div>

Hello,to enable shadow,vtkShadowMapPass is added like this: //enable light shadow showing vtkNew shadows; vtkNew seq; vtkNew passes; passes-\>AddItem(shadows-\>GetShadowMapBakerPass()); passes-\>AddIt…

---

## [How to make MPR adaptive window size?](https://discourse.vtk.org/t/how-to-make-mpr-adaptive-window-size/9195)

<div class="topic-metadata">

**Author:** [@wulicheng](https://discourse.vtk.org/u/wulicheng)\
**Replies:** 0\
**Last updated:** [August 23, 2022, 8:52am UTC](https://discourse.vtk.org/t/how-to-make-mpr-adaptive-window-size/9195 "2022-08-23T08:52:07Z")

</div>

Beacause of different image size, some MPR show very small in the render window,and How to make MPR adaptive window size?

---

## [How to pick vtkLODProp3D?](https://discourse.vtk.org/t/how-to-pick-vtklodprop3d/9184)

<div class="topic-metadata">

**Author:** [@AlexLuya](https://discourse.vtk.org/u/AlexLuya)\
**Replies:** 1\
**Last updated:** [August 23, 2022, 6:06am UTC](https://discourse.vtk.org/t/how-to-pick-vtklodprop3d/9184 "2022-08-23T06:06:03Z")

</div>

After changing from vtkActor to vtkLODProp3D, vtkNew\<vtkPropPicker\> picker; picker-\>Pick(upPos\[0\], upPos\[1\], 0, this-\>GetCurrentRenderer()); if (picker-\>GetProp3D() == nullptr && picker-\>GetActor() == nullptr && pic…

---

## [transparent objects not rendered with vtk9 and mesa 18.3.6 on centos7](https://discourse.vtk.org/t/transparent-objects-not-rendered-with-vtk9-and-mesa-18-3-6-on-centos7/9189)

<div class="topic-metadata">

**Author:** [@ErroMsg](https://discourse.vtk.org/u/ErroMsg)\
**Replies:** 0\
**Last updated:** [August 23, 2022, 2:56am UTC](https://discourse.vtk.org/t/transparent-objects-not-rendered-with-vtk9-and-mesa-18-3-6-on-centos7/9189 "2022-08-23T02:56:38Z")

</div>

I tried to use VTK 9.0.2 to show transparent objects on CentOS-7 with mesa , but the objects which is set opacity less than 1.0 will not render. I’v tried use LIBGL\_ALWAYS\_SOFTWARE=1 , it doesn’t work. Has anyone usi…

---

## [How do put different labels/annotations on faces of VTKHexahedron](https://discourse.vtk.org/t/how-do-put-different-labels-annotations-on-faces-of-vtkhexahedron/9173)

<div class="topic-metadata">

**Author:** [@ujjwala](https://discourse.vtk.org/u/ujjwala)\
**Replies:** 4\
**Last updated:** [August 22, 2022, 11:31pm UTC](https://discourse.vtk.org/t/how-do-put-different-labels-annotations-on-faces-of-vtkhexahedron/9173 "2022-08-22T23:31:31Z")

</div>

Hi VTK experts, I’m new to VTK and I cannot seem to figure out how to put different text annotations/labels on the faces of a VTKHexahedron. I’m displaying a thousands of cubes ( implemented using vtkhexahedrons) stack…

---

## [using vtkLabeledContourMapper got error message “Error must have verts, program and vao”](https://discourse.vtk.org/t/using-vtklabeledcontourmapper-got-error-message-error-must-have-verts-program-and-vao/8975)

<div class="topic-metadata">

**Author:** [@YuNie](https://discourse.vtk.org/u/YuNie)\
**Replies:** 3\
**Last updated:** [August 22, 2022, 2:30am UTC](https://discourse.vtk.org/t/using-vtklabeledcontourmapper-got-error-message-error-must-have-verts-program-and-vao/8975 "2022-08-22T02:30:44Z")

</div>

hello! I was tring to use vtkLabeledContourMapper to show the contour line and label. But when I run my code, I got a message window shows that “Error must have verts, program and vao”. My code is shown as below. I k…

---

## [For vtkLODProp3D switching,is possible to get the previous LOD ID?](https://discourse.vtk.org/t/for-vtklodprop3d-switching-is-possible-to-get-the-previous-lod-id/9182)

<div class="topic-metadata">

**Author:** [@AlexLuya](https://discourse.vtk.org/u/AlexLuya)\
**Replies:** 0\
**Last updated:** [August 21, 2022, 3:10pm UTC](https://discourse.vtk.org/t/for-vtklodprop3d-switching-is-possible-to-get-the-previous-lod-id/9182 "2022-08-21T15:10:37Z")

</div>

Hello,there four methods to get LOD ID GetLastRenderedLODID GetSelectedPickLODID GetSelectedLODID GetPickLODID But their api docs are quite confusing for me,so I add an observer to render windows to listen ModifiedEven…

---

## [How to disable interpolation (bluring image) in ImagePlaneWidget?](https://discourse.vtk.org/t/how-to-disable-interpolation-bluring-image-in-imageplanewidget/9172)

<div class="topic-metadata">

**Author:** [@BJladika](https://discourse.vtk.org/u/BJladika)\
**Replies:** 3\
**Last updated:** [August 19, 2022, 3:06pm UTC](https://discourse.vtk.org/t/how-to-disable-interpolation-bluring-image-in-imageplanewidget/9172 "2022-08-19T15:06:35Z")

</div>

Hello, I’ve found that piece of code of running Multi Planar Reconstruction via ImagePlaneWidget and I wanted to run it, but it shows images blurred (can’t see raw pixels). I wanted to disable interpolation, but it seems…

---

## [vtksys 9.2 Debug vs. Release mode](https://discourse.vtk.org/t/vtksys-9-2-debug-vs-release-mode/9163)

<div class="topic-metadata">

**Author:** [@ShaneKirkbride](https://discourse.vtk.org/u/ShaneKirkbride)\
**Replies:** 3\
**Last updated:** [August 19, 2022, 11:47am UTC](https://discourse.vtk.org/t/vtksys-9-2-debug-vs-release-mode/9163 "2022-08-19T11:47:49Z")

</div>

I’m running a windows 11 environment compiling with VS2019. I complied 9.2.rc2 in release and in debug mode. I followed the example: https://kitware.github.io/vtk-examples/site/Cxx/Utilities/FilenameFunctions/ In Debu…

---

## [how to combine two different vtk file?](https://discourse.vtk.org/t/how-to-combine-two-different-vtk-file/9170)

<div class="topic-metadata">

**Author:** [@Zhao412](https://discourse.vtk.org/u/Zhao412)\
**Replies:** 1\
**Last updated:** [August 19, 2022, 3:10am UTC](https://discourse.vtk.org/t/how-to-combine-two-different-vtk-file/9170 "2022-08-19T03:10:20Z")

</div>

i have two different vtk file,both are RECTILINEAR\_GRID could i combine these into one vtk file? vtk DataFile Version 4.2 vtk output ASCII DATASET RECTILINEAR\_GRID DIMENSIONS 11 11 11 X\_COORDINATES 11 double -20.0…

---

## [Are UserTransforms going to be deprecated?](https://discourse.vtk.org/t/are-usertransforms-going-to-be-deprecated/9165)

<div class="topic-metadata">

**Author:** [@rdbrn](https://discourse.vtk.org/u/rdbrn)\
**Replies:** 0\
**Last updated:** [August 17, 2022, 4:50pm UTC](https://discourse.vtk.org/t/are-usertransforms-going-to-be-deprecated/9165 "2022-08-17T16:50:31Z")

</div>

I’ve always been using SetUserTransform/Matrix to set the position of actors until I found something that didn’t work and I started looking for documentation of the UserTransform. Then I found this issue: Document vtkAc…

---

## [VTK 9.2 : Picking cells by adding another actor containing only these cells cause weird rendering effect](https://discourse.vtk.org/t/vtk-9-2-picking-cells-by-adding-another-actor-containing-only-these-cells-cause-weird-rendering-effect/9119)

<div class="topic-metadata">

**Author:** [@KEN](https://discourse.vtk.org/u/KEN)\
**Replies:** 3\
**Last updated:** [August 17, 2022, 6:20pm UTC](https://discourse.vtk.org/t/vtk-9-2-picking-cells-by-adding-another-actor-containing-only-these-cells-cause-weird-rendering-effect/9119 "2022-08-17T18:20:33Z")

</div>

In my program, I add actor containing only the selected cells on the top of the actor containing all cells. The first actor containing all cells has front face color gray(0.5,0.5,0.5) and back face color yellow(0.8,0.8,…

---

## [Clean reset polydata normals](https://discourse.vtk.org/t/clean-reset-polydata-normals/8842)

<div class="topic-metadata">

**Author:** [@micheleivani](https://discourse.vtk.org/u/micheleivani)\
**Replies:** 11\
**Last updated:** [August 17, 2022, 9:16am UTC](https://discourse.vtk.org/t/clean-reset-polydata-normals/8842 "2022-08-17T09:16:13Z")

</div>

I’m building a feature that requires turning on and off the splitting option inside the vtkPolyDataNormals filter after a user action. The problem is the recalling of the normal filter on the polydata coming from the pre…

---

## [Build an desktop application using vtk](https://discourse.vtk.org/t/build-an-desktop-application-using-vtk/8542)

<div class="topic-metadata">

**Author:** [@FrancoisW](https://discourse.vtk.org/u/FrancoisW)\
**Replies:** 7\
**Last updated:** [August 17, 2022, 12:15am UTC](https://discourse.vtk.org/t/build-an-desktop-application-using-vtk/8542 "2022-08-17T00:15:24Z")

</div>

Hi, I’m going to create an application for windows and macOS. I want to use the vtk library to visualize some data in this application. I’m not sure which framework to use to create my GUI. Can anybody tell me what will…

---

## [Can I return cell types from a vtkPolyData using the Python bindings](https://discourse.vtk.org/t/can-i-return-cell-types-from-a-vtkpolydata-using-the-python-bindings/9159)

<div class="topic-metadata">

**Author:** [@scotsman60](https://discourse.vtk.org/u/scotsman60)\
**Replies:** 2\
**Last updated:** [August 16, 2022, 11:59pm UTC](https://discourse.vtk.org/t/can-i-return-cell-types-from-a-vtkpolydata-using-the-python-bindings/9159 "2022-08-16T23:59:21Z")

</div>

Hello!!! I’m trying to read the cell types in a vtkPolyData using the vtk Python bindings. The method returns the cell types by reference. virtual void vtkDataSet::GetCellTypes ( vtkCellTypes \* types ) I’m trying to…

---

## [Question about coordinate system transformations](https://discourse.vtk.org/t/question-about-coordinate-system-transformations/9158)

<div class="topic-metadata">

**Author:** [@gzt036](https://discourse.vtk.org/u/gzt036)\
**Replies:** 1\
**Last updated:** [August 16, 2022, 7:35pm UTC](https://discourse.vtk.org/t/question-about-coordinate-system-transformations/9158 "2022-08-16T19:35:57Z")

</div>

What is the standard way to transform from the Screen coordinate (x,y) to world coordinate World(x,y,z) and from world coordinate to a prop3D’s local coordinate Local(x,y,z)? and how to do the reverse transformation? Tha…

---

## [PoissonReconstruction](https://discourse.vtk.org/t/poissonreconstruction/4777)

<div class="topic-metadata">

**Author:** [@SArbabi](https://discourse.vtk.org/u/SArbabi)\
**Replies:** 14\
**Last updated:** [August 16, 2022, 6:43pm UTC](https://discourse.vtk.org/t/poissonreconstruction/4777 "2022-08-16T18:43:36Z")

</div>

to use PoissonReconstruction in VTK in the examples site, it says to: Enable the remote module by setting Module\_PoissonReconstruction:BOOL=ON. but where in the building process I should do this setting? it’s not one o…

---

## [VTK 9.1: How to specify install dir for python modules?](https://discourse.vtk.org/t/vtk-9-1-how-to-specify-install-dir-for-python-modules/9155)

<div class="topic-metadata">

**Author:** [@Sophonet](https://discourse.vtk.org/u/Sophonet)\
**Replies:** 2\
**Last updated:** [August 16, 2022, 4:38pm UTC](https://discourse.vtk.org/t/vtk-9-1-how-to-specify-install-dir-for-python-modules/9155 "2022-08-16T16:38:43Z")

</div>

Hi, currently, on Windows, python modules are installed in ${CMAKE\_INSTALL\_PREFIX}/bin/Lib/site-packages, which is not common. I would like to have them installed in ${CMAKE\_INSTALL\_PREFIX}/lib/site-packages but have not…

---

## [XMLImagedatareader speed up VTI file loading](https://discourse.vtk.org/t/xmlimagedatareader-speed-up-vti-file-loading/9128)

<div class="topic-metadata">

**Author:** [@sysuLay](https://discourse.vtk.org/u/sysuLay)\
**Replies:** 6\
**Last updated:** [August 16, 2022, 2:59pm UTC](https://discourse.vtk.org/t/xmlimagedatareader-speed-up-vti-file-loading/9128 "2022-08-16T14:59:50Z")

</div>

when I use the XMLImagedatareader to load my vti file that I converted, it wastes one minute. But when I load the VTI file downloaded from the vtkjs official website, like head-binary-zlib.vti ,it just need 5s. How to…

---

## [Is it possible to create a light with spot like a ring?](https://discourse.vtk.org/t/is-it-possible-to-create-a-light-with-spot-like-a-ring/9145)

<div class="topic-metadata">

**Author:** [@AlexLuya](https://discourse.vtk.org/u/AlexLuya)\
**Replies:** 1\
**Last updated:** [August 16, 2022, 2:05pm UTC](https://discourse.vtk.org/t/is-it-possible-to-create-a-light-with-spot-like-a-ring/9145 "2022-08-16T14:05:46Z")

</div>

Hello,the ring spot must be a ring like this: Is it possible to implement it in VTK?

---

## [Social Media Groups for vtk js](https://discourse.vtk.org/t/social-media-groups-for-vtk-js/9148)

<div class="topic-metadata">

**Author:** [@Stephen\_Strange](https://discourse.vtk.org/u/Stephen_Strange)\
**Replies:** 1\
**Last updated:** [August 16, 2022, 1:49pm UTC](https://discourse.vtk.org/t/social-media-groups-for-vtk-js/9148 "2022-08-16T13:49:31Z")

</div>

Does anyone has a whatsapp, telegram aur any other social media group link where we can discuss about vtk js

---

## [Can't color a XML Unstructured Grid (\*.vtu)](https://discourse.vtk.org/t/cant-color-a-xml-unstructured-grid-vtu/8660)

<div class="topic-metadata">

**Author:** [@graysuit](https://discourse.vtk.org/u/graysuit)\
**Replies:** 11\
**Last updated:** [August 16, 2022, 8:05am UTC](https://discourse.vtk.org/t/cant-color-a-xml-unstructured-grid-vtu/8660 "2022-08-16T08:05:55Z")

</div>

Hi I have code, which can color \*.vtp, \*.vtk. But same code fails to color \*.vtu. I have list of vtkactors. And I specify which actor to set properties from. This code which gets all column names from actor index: …

---

## [The link to tests of Detailed Description in vtk doc might be invalidated](https://discourse.vtk.org/t/the-link-to-tests-of-detailed-description-in-vtk-doc-might-be-invalidated/9144)

<div class="topic-metadata">

**Author:** [@jumbojing](https://discourse.vtk.org/u/jumbojing)\
**Replies:** 1\
**Last updated:** [August 16, 2022, 2:31am UTC](https://discourse.vtk.org/t/the-link-to-tests-of-detailed-description-in-vtk-doc-might-be-invalidated/9144 "2022-08-16T02:31:25Z")

</div>

The link of vtk examples (e.g.VTK: Class To Tests (C) ) to gitlab might be invalidated. Not Found (kitware.com)

---

## [How to create vtkPartitionedDataSet in parallel using SMP?](https://discourse.vtk.org/t/how-to-create-vtkpartitioneddataset-in-parallel-using-smp/9085)

<div class="topic-metadata">

**Author:** [@Cameron](https://discourse.vtk.org/u/Cameron)\
**Replies:** 4\
**Last updated:** [August 15, 2022, 5:22pm UTC](https://discourse.vtk.org/t/how-to-create-vtkpartitioneddataset-in-parallel-using-smp/9085 "2022-08-15T17:22:33Z")

</div>

I need to create a number of vtkPartitionedDataSet object which is completely independent of each other. Then, they will be added to vtkPartitionedDataSetCollection. How do I parallelize this process? Are there any out …

[Previous page](https://discourse.vtk.org/latest.md?page=119)

[Next page](https://discourse.vtk.org/latest.md?page=121)