# Development

**URL:** https://discourse.slicer.org/c/dev/5.md?no_subcategories=false&page=81

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

**Page:** 82

---

## [Reproducible Slicer crash when pushing to some volume nodes using sitkUtils PushVolumeToSlicer](https://discourse.slicer.org/t/reproducible-slicer-crash-when-pushing-to-some-volume-nodes-using-sitkutils-pushvolumetoslicer/15723)

<div class="topic-metadata">

**Author:** [@mikebind](https://discourse.slicer.org/u/mikebind)\
**Replies:** 3\
**Last updated:** [January 29, 2021, 11:02pm UTC](https://discourse.slicer.org/t/reproducible-slicer-crash-when-pushing-to-some-volume-nodes-using-sitkutils-pushvolumetoslicer/15723 "2021-01-29T23:02:32Z")

</div>

I have run into a reproducible Slicer crash when using sitkUtils PushVolumeToSlicer(). If the output volume node exists and has some characteristic, then Slicer crashes. I have not been able to figure out what the char…

---

## [Web application based on vtk.js](https://discourse.slicer.org/t/web-application-based-on-vtk-js/15725)

<div class="topic-metadata">

**Author:** [@spycolyf](https://discourse.slicer.org/u/spycolyf)\
**Replies:** 4\
**Last updated:** [January 29, 2021, 3:43pm UTC](https://discourse.slicer.org/t/web-application-based-on-vtk-js/15725 "2021-01-29T15:43:55Z")

</div>

This is really cool…

---

## [How to use VMTK split the vessel tree's branch?](https://discourse.slicer.org/t/how-to-use-vmtk-split-the-vessel-trees-branch/15667)

<div class="topic-metadata">

**Author:** [@RayCui](https://discourse.slicer.org/u/RayCui)\
**Replies:** 2\
**Last updated:** [January 29, 2021, 6:16am UTC](https://discourse.slicer.org/t/how-to-use-vmtk-split-the-vessel-trees-branch/15667 "2021-01-29T06:16:10Z")

</div>

My purpose is to get the branched segmentation file(such as .nii.gz, .mhd) and the centerline file from the whole binary vessel tree. @lassoan @lantiga How can I convert the centerline (vtkPolyData) obtained by vtkvm…

---

## [Layered rendering with multiple renderers](https://discourse.slicer.org/t/layered-rendering-with-multiple-renderers/14630)

<div class="topic-metadata">

**Author:** [@fpsiddiqui91](https://discourse.slicer.org/u/fpsiddiqui91)\
**Replies:** 10\
**Last updated:** [January 27, 2021, 9:18pm UTC](https://discourse.slicer.org/t/layered-rendering-with-multiple-renderers/14630 "2021-01-27T21:18:49Z")

</div>

Hello developers, I am stuck in a problem that seems a bit basic but still could not solve it yet. I am using multiple rendering layers to render different kinds of Fiber tracts (Red and orange) overlaid each other. As…

---

## [Plus configuration to retrieve images from Verasonics US scanner and perform 3D reconstruction](https://discourse.slicer.org/t/plus-configuration-to-retrieve-images-from-verasonics-us-scanner-and-perform-3d-reconstruction/599)

<div class="topic-metadata">

**Author:** [@Tiffas](https://discourse.slicer.org/u/Tiffas)\
**Replies:** 8\
**Last updated:** [January 27, 2021, 7:23pm UTC](https://discourse.slicer.org/t/plus-configuration-to-retrieve-images-from-verasonics-us-scanner-and-perform-3d-reconstruction/599 "2021-01-27T19:23:45Z")

</div>

Hi, I use a Verasonics ultrasound scanner which sends, using OpenIGTLink protocol, images to an other computer on which Slicer runs. On the Verasonics side I have a OpenIGTLink client (coded with Matlab, unfortunately …

---

## [Add label tag in 3D view](https://discourse.slicer.org/t/add-label-tag-in-3d-view/15646)

<div class="topic-metadata">

**Author:** [@RanChenSignIn](https://discourse.slicer.org/u/RanChenSignIn)\
**Replies:** 7\
**Last updated:** [January 26, 2021, 10:10am UTC](https://discourse.slicer.org/t/add-label-tag-in-3d-view/15646 "2021-01-26T10:10:09Z")

</div>

hello everyone, i have a question, i have a segmentation with many labels, How do i add a tag on each label in 3D view, and rotation angle of view to display only part of the labels tag?

---

## [How to Install VMTK in 3d Slicer?](https://discourse.slicer.org/t/how-to-install-vmtk-in-3d-slicer/15634)

<div class="topic-metadata">

**Author:** [@akshay\_pillai](https://discourse.slicer.org/u/akshay_pillai)\
**Replies:** 1\
**Last updated:** [January 22, 2021, 10:21pm UTC](https://discourse.slicer.org/t/how-to-install-vmtk-in-3d-slicer/15634 "2021-01-22T22:21:30Z")

</div>

I need to install vmtk(to use vmtkcenterlinesmoothing, etc)in 3d slicer through the python interactor. How do I do that, I am on a windows terminal, any help is appreciated. I know I can install scipy and others using s…

---

## [Packaging instructions for macOS](https://discourse.slicer.org/t/packaging-instructions-for-macos/15632)

<div class="topic-metadata">

**Author:** [@pll\_llq](https://discourse.slicer.org/u/pll_llq)\
**Replies:** 4\
**Last updated:** [January 22, 2021, 6:07pm UTC](https://discourse.slicer.org/t/packaging-instructions-for-macos/15632 "2021-01-22T18:07:33Z")

</div>

Hi, I’ve successfully built Slicer from source on macOS 11.1 but I am having trouble packaging the app. I’ve tried building with Qt installed from a web-installer and from homebrew. When I try to package Slicer build w…

---

## [Creating teaching overlays](https://discourse.slicer.org/t/creating-teaching-overlays/15538)

<div class="topic-metadata">

**Author:** [@arumiat](https://discourse.slicer.org/u/arumiat)\
**Replies:** 10\
**Last updated:** [January 20, 2021, 10:59am UTC](https://discourse.slicer.org/t/creating-teaching-overlays/15538 "2021-01-20T10:59:02Z")

</div>

I saw this very nice resource that, as you scroll through images, shows overlays to demonstrate anatomy / pathology etc. labelling|1x1 I’m curious, is there a way to do this in Slicer? And if not, would it be a matter…

---

## [Build on macOS 11 fails in the middle (after building vtkpython)](https://discourse.slicer.org/t/build-on-macos-11-fails-in-the-middle-after-building-vtkpython/15570)

<div class="topic-metadata">

**Author:** [@pll\_llq](https://discourse.slicer.org/u/pll_llq)\
**Replies:** 16\
**Last updated:** [January 20, 2021, 5:43am UTC](https://discourse.slicer.org/t/build-on-macos-11-fails-in-the-middle-after-building-vtkpython/15570 "2021-01-20T05:43:48Z")

</div>

Hi! I’m having trouble trying to build Slicer on macOS 11 (Intel) Source code from git (master branch) Qt 5.15.0 cmake version 3.19.3 Apple clang version 12.0.0 (clang-1200.0.32.28) I configure the build with this com…

---

## [Can I draw a line in a segment by two points(X,Y)](https://discourse.slicer.org/t/can-i-draw-a-line-in-a-segment-by-two-points-x-y/15579)

<div class="topic-metadata">

**Author:** [@timeanddoctor](https://discourse.slicer.org/u/timeanddoctor)\
**Replies:** 2\
**Last updated:** [January 18, 2021, 3:02pm UTC](https://discourse.slicer.org/t/can-i-draw-a-line-in-a-segment-by-two-points-x-y/15579 "2021-01-18T15:02:28Z")

</div>

Can I draw a line in a single slice of a segment by two points(x,y), and then apply it in this segment by python.

---

## [Crash when initializing app built and run from Ubuntu 20.04](https://discourse.slicer.org/t/crash-when-initializing-app-built-and-run-from-ubuntu-20-04/13265)

<div class="topic-metadata">

**Author:** [@Atabak](https://discourse.slicer.org/u/Atabak)\
**Replies:** 29\
**Last updated:** [January 17, 2021, 8:40am UTC](https://discourse.slicer.org/t/crash-when-initializing-app-built-and-run-from-ubuntu-20-04/13265 "2021-01-17T08:40:17Z")

</div>

Operating system: Ubuntu 20.04.1 LTS Slicer version: \[v4.11\] Expected behavior: To load Slicer Actual behavior: Failed Loading Slicer I finally succeeded in building Slicer, but the software is not loading. I have no…

---

## [Error when installing opencv with Python Interactor on mac](https://discourse.slicer.org/t/error-when-installing-opencv-with-python-interactor-on-mac/15544)

<div class="topic-metadata">

**Author:** [@HodaGH](https://discourse.slicer.org/u/HodaGH)\
**Replies:** 3\
**Last updated:** [January 15, 2021, 10:08pm UTC](https://discourse.slicer.org/t/error-when-installing-opencv-with-python-interactor-on-mac/15544 "2021-01-15T22:08:01Z")

</div>

Hi everyone, I have MacOS 10.14. I’m trying to install opencv in the python interactor by this code: from slicer.util import pip\_install pip\_install(“opencv”) I get this error: ERROR: Could not find a version that s…

---

## [How to set the input transforms for calibration](https://discourse.slicer.org/t/how-to-set-the-input-transforms-for-calibration/15533)

<div class="topic-metadata">

**Author:** [@timeanddoctor](https://discourse.slicer.org/u/timeanddoctor)\
**Replies:** 1\
**Last updated:** [January 15, 2021, 1:41am UTC](https://discourse.slicer.org/t/how-to-set-the-input-transforms-for-calibration/15533 "2021-01-15T01:41:26Z")

</div>

I collected a stack of transform data(np.array(\[matrix\]\[matrix\]\[matrix\]…)) in different times and I tend to use spin calibration in 3d slicer to get the transform to calculate the spin axis.I have tried this code but see…

---

## [Who owns the Slicer username or group on gitlab.com?](https://discourse.slicer.org/t/who-owns-the-slicer-username-or-group-on-gitlab-com/15530)

<div class="topic-metadata">

**Author:** [@jcfr](https://discourse.slicer.org/u/jcfr)\
**Replies:** 3\
**Last updated:** [January 14, 2021, 9:34pm UTC](https://discourse.slicer.org/t/who-owns-the-slicer-username-or-group-on-gitlab-com/15530 "2021-01-14T21:34:53Z")

</div>

I tried to create the group Slicer on gitbab.com and realized it was not available. Background While working on addressing issues related to use of Plastimatch in the SlicerRt extension, I realized a fork of plastimatch…

---

## [Static build of Slicer](https://discourse.slicer.org/t/static-build-of-slicer/4011)

<div class="topic-metadata">

**Author:** [@cpinter](https://discourse.slicer.org/u/cpinter)\
**Replies:** 11\
**Last updated:** [January 14, 2021, 12:56am UTC](https://discourse.slicer.org/t/static-build-of-slicer/4011 "2021-01-14T00:56:23Z")

</div>

Does anyone know if there is a way to statically build Slicer so that there is only one Slicer.exe and no vtkSlicer\*.dll, qSlicer\*.dll, vtkMRML\*.dll or qMRML\*.dll etc? I tried configuring with BUILD\_SHARED\_LIBS=OFF, but…

---

## [New Developer Feature - StyleTester](https://discourse.slicer.org/t/new-developer-feature-styletester/15509)

<div class="topic-metadata">

**Author:** [@Sam\_Horvath](https://discourse.slicer.org/u/Sam_Horvath)\
**Replies:** 0\
**Last updated:** [January 13, 2021, 4:42pm UTC](https://discourse.slicer.org/t/new-developer-feature-styletester/15509 "2021-01-13T16:42:20Z")

</div>

We’ve added a new utility module to the SlicerSandbox extension, StyleTester. StyleTester allows you to test modifying the appearance of the Slicer GUI using Qt Style Sheets. Qt Style Sheets provide an very powerful m…

---

## [What is the Algorithm and Theory of spin calibration?](https://discourse.slicer.org/t/what-is-the-algorithm-and-theory-of-spin-calibration/15434)

<div class="topic-metadata">

**Author:** [@timeanddoctor](https://discourse.slicer.org/u/timeanddoctor)\
**Replies:** 5\
**Last updated:** [January 13, 2021, 11:51am UTC](https://discourse.slicer.org/t/what-is-the-algorithm-and-theory-of-spin-calibration/15434 "2021-01-13T11:51:44Z")

</div>

I am studing the calibration and researched many publicatioins but get nothing about the spin calibration. I tend to know what is the Algorithm and Math Theory of spin calibration?

---

## [Best way to deal with changes during code reviews](https://discourse.slicer.org/t/best-way-to-deal-with-changes-during-code-reviews/15446)

<div class="topic-metadata">

**Author:** [@RafaelPalomar](https://discourse.slicer.org/u/RafaelPalomar)\
**Replies:** 2\
**Last updated:** [January 11, 2021, 8:01pm UTC](https://discourse.slicer.org/t/best-way-to-deal-with-changes-during-code-reviews/15446 "2021-01-11T20:01:29Z")

</div>

@jcfr, @lassoan, @pieper I was just wondering what is the best way to integrate changes requested during a code review done in Github. After accepting changes in Github your commits look like this (Approach 1): Update …

---

## [How to transform fiducial coordinates into image space](https://discourse.slicer.org/t/how-to-transform-fiducial-coordinates-into-image-space/15442)

<div class="topic-metadata">

**Author:** [@FatihSogukpinar](https://discourse.slicer.org/u/FatihSogukpinar)\
**Replies:** 4\
**Last updated:** [January 11, 2021, 6:13am UTC](https://discourse.slicer.org/t/how-to-transform-fiducial-coordinates-into-image-space/15442 "2021-01-11T06:13:03Z")

</div>

Thanks a lot @lassoan One last (and kind of dumb) question : If I want to transform my fiducials points to my image space, (rather than rotating my slice view), can I do that by using this transform matrix ? I have some…

---

## [Improving the exposure of \`vtkSlicerModuleLogic\`s to other components](https://discourse.slicer.org/t/improving-the-exposure-of-vtkslicermodulelogic-s-to-other-components/15375)

<div class="topic-metadata">

**Author:** [@RafaelPalomar](https://discourse.slicer.org/u/RafaelPalomar)\
**Replies:** 2\
**Last updated:** [January 7, 2021, 9:33pm UTC](https://discourse.slicer.org/t/improving-the-exposure-of-vtkslicermodulelogic-s-to-other-components/15375 "2021-01-07T21:33:21Z")

</div>

The purpose of this post is to frame the discussion around improving the exposure of vtkSlicerModuleLogics to other Slicer components (e.g., displayable managers). After having a look at the code, my understanding of the…

---

## [Python debugging in Visual Studio 2019](https://discourse.slicer.org/t/python-debugging-in-visual-studio-2019/15369)

<div class="topic-metadata">

**Author:** [@stephan](https://discourse.slicer.org/u/stephan)\
**Replies:** 2\
**Last updated:** [January 7, 2021, 7:39pm UTC](https://discourse.slicer.org/t/python-debugging-in-visual-studio-2019/15369 "2021-01-07T19:39:50Z")

</div>

Hi, has anyone managed to attach the Visual Studio 2019 (community edition) debugger to Slicer’s python? I installed the Slicer DebuggingTools extension and followed the steps in the extension’s documentation for attach…

---

## [Fatal error: qmrmlnodecombobox.h: No such file or directory](https://discourse.slicer.org/t/fatal-error-qmrmlnodecombobox-h-no-such-file-or-directory/2338)

<div class="topic-metadata">

**Author:** [@brhoom](https://discourse.slicer.org/u/brhoom)\
**Replies:** 13\
**Last updated:** [January 7, 2021, 3:54pm UTC](https://discourse.slicer.org/t/fatal-error-qmrmlnodecombobox-h-no-such-file-or-directory/2338 "2021-01-07T15:54:36Z")

</div>

Dear all, I think there is a bug related to the error in the title. I found there is still unanswered post here It happens when I compile my extension in Linux (windows users don’t have this problem). I found out that …

---

## [How can I get the Python source code of Fiducial Registration Wizard module?](https://discourse.slicer.org/t/how-can-i-get-the-python-source-code-of-fiducial-registration-wizard-module/15384)

<div class="topic-metadata">

**Author:** [@11141](https://discourse.slicer.org/u/11141)\
**Replies:** 1\
**Last updated:** [January 7, 2021, 2:37pm UTC](https://discourse.slicer.org/t/how-can-i-get-the-python-source-code-of-fiducial-registration-wizard-module/15384 "2021-01-07T14:37:38Z")

</div>

Hi, I am a student working at KIST(Korea Institute of Science and Technology). I want to add my own function to this module. Is it possible? If possible, can I get the Python source code of Fiducial Registration Wizard…

---

## [Pedicle Screw Simulator](https://discourse.slicer.org/t/pedicle-screw-simulator/15359)

<div class="topic-metadata">

**Author:** [@Amir\_Zolal](https://discourse.slicer.org/u/Amir_Zolal)\
**Replies:** 1\
**Last updated:** [January 5, 2021, 9:48pm UTC](https://discourse.slicer.org/t/pedicle-screw-simulator/15359 "2021-01-05T21:48:59Z")

</div>

Hello, in pedicle screw simulator, the length / width definition is mismatched. I.e. the model you chose with length of 700 and thickness of 50 in the menu is actually a 50 mm long screw of 7 mm thickness. That also mak…

---

## [How to import the transform getted from slicer for vtk?](https://discourse.slicer.org/t/how-to-import-the-transform-getted-from-slicer-for-vtk/15316)

<div class="topic-metadata">

**Author:** [@timeanddoctor](https://discourse.slicer.org/u/timeanddoctor)\
**Replies:** 1\
**Last updated:** [January 2, 2021, 9:23pm UTC](https://discourse.slicer.org/t/how-to-import-the-transform-getted-from-slicer-for-vtk/15316 "2021-01-02T21:23:25Z")

</div>

I registrated two model in slicer and get the transform but it is not the same with VTK.(The promblem may be “different coordinate system” ) I searched the forum to deal with it by python code(get the slicer’s transform…

---

## [Development of 3D Slicer Implant planning Module](https://discourse.slicer.org/t/development-of-3d-slicer-implant-planning-module/10589)

<div class="topic-metadata">

**Author:** [@manjula](https://discourse.slicer.org/u/manjula)\
**Replies:** 1\
**Last updated:** [March 8, 2020, 9:17pm UTC](https://discourse.slicer.org/t/development-of-3d-slicer-implant-planning-module/10589 "2020-03-08T21:17:35Z")

</div>

We have started developing a module based on Pedicle Screw Simulator for dental implant planning, simulation and navigation @chamath , @anuradha and @Anuradha\_Rajapaksha . We would hope for support in this project and …

---

## [Transform fiducialNodes by python script](https://discourse.slicer.org/t/transform-fiducialnodes-by-python-script/15320)

<div class="topic-metadata">

**Author:** [@1116](https://discourse.slicer.org/u/1116)\
**Replies:** 1\
**Last updated:** [January 3, 2021, 4:31am UTC](https://discourse.slicer.org/t/transform-fiducialnodes-by-python-script/15320 "2021-01-03T04:31:43Z")

</div>

I want to transform some fiducialNodes by transformnode but i can only get same value of fiducialNodes before transform. Could you indentify what’s wrong? The transformNode was created by elastix module

---

## [CDash test results showing empty webpage](https://discourse.slicer.org/t/cdash-test-results-showing-empty-webpage/15301)

<div class="topic-metadata">

**Author:** [@jamesobutler](https://discourse.slicer.org/u/jamesobutler)\
**Replies:** 1\
**Last updated:** [January 1, 2021, 6:38am UTC](https://discourse.slicer.org/t/cdash-test-results-showing-empty-webpage/15301 "2021-01-01T06:38:35Z")

</div>

I’ve noticed that I’m unable to review specific test output across all platforms on the Slicer CDash. I can see which tests have pass/failed, but the specific test case output is just an empty webpage. http://slicer.cdas…

---

## [Capture slice view widget events](https://discourse.slicer.org/t/capture-slice-view-widget-events/15278)

<div class="topic-metadata">

**Author:** [@talmazov](https://discourse.slicer.org/u/talmazov)\
**Replies:** 1\
**Last updated:** [December 29, 2020, 7:04pm UTC](https://discourse.slicer.org/t/capture-slice-view-widget-events/15278 "2020-12-29T19:04:16Z")

</div>

Hey all, I would like to know if it is possible to attach a function callback on event associated with the view slice’s change in position. Basically callback on the slider i have circled in the attached screenshot. T…

[Previous page](https://discourse.slicer.org/c/dev/5.md?no_subcategories=false&page=80)

[Next page](https://discourse.slicer.org/c/dev/5.md?no_subcategories=false&page=82)