# Development

**URL:** https://discourse.slicer.org/c/dev/5.md?no_subcategories=false&page=113

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

**Page:** 114

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## [Extract features using pyRadiomis](https://discourse.slicer.org/t/extract-features-using-pyradiomis/4977)

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**Author:** [@camelia](https://discourse.slicer.org/u/camelia)\
**Replies:** 1\
**Last updated:** [December 6, 2018, 2:38pm UTC](https://discourse.slicer.org/t/extract-features-using-pyradiomis/4977 "2018-12-06T14:38:12Z")

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Hello everyone ! I’m trying to use pyRadiomics to extract features on a brain tumor from DICOM images in Python. pyRadiomics doesn’t accept dicom as an input. I’m using SimpleITK to read the dcm images but I can’t d…

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## [Support --designer launcher argument for Qt5 build](https://discourse.slicer.org/t/support-designer-launcher-argument-for-qt5-build/1917)

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**Author:** [@cpinter](https://discourse.slicer.org/u/cpinter)\
**Replies:** 2\
**Last updated:** [December 6, 2018, 5:57am UTC](https://discourse.slicer.org/t/support-designer-launcher-argument-for-qt5-build/1917 "2018-12-06T05:57:20Z")

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The --designer launcher switch doesn’t work with Qt5 builds. It seems that it’s because the variable checked at this line is empty: It would be great if this variable was set for Qt5 automatically. Any ideas how to m…

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## [Qt5 build : a few hiccups](https://discourse.slicer.org/t/qt5-build-a-few-hiccups/952)

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**Author:** [@chir.set](https://discourse.slicer.org/u/chir.set)\
**Replies:** 26\
**Last updated:** [January 18, 2018, 4:04pm UTC](https://discourse.slicer.org/t/qt5-build-a-few-hiccups/952 "2018-01-18T16:04:06Z")

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After using the Qt5 build for one week, here are some minor problems. Whenever an item is selected in the Fiducial/ROI/Ruler tool, the items get duplicated to an certain number of items that I didn’t count. In Vo…

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## [Slicer VR scene saved](https://discourse.slicer.org/t/slicer-vr-scene-saved/4944)

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**Author:** [@M\_pavi](https://discourse.slicer.org/u/M_pavi)\
**Replies:** 4\
**Last updated:** [December 4, 2018, 12:07am UTC](https://discourse.slicer.org/t/slicer-vr-scene-saved/4944 "2018-12-04T00:07:11Z")

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Hi Regarding the Slicer VR, let’s say specifically, to save the Virtual reality scene once I did changes. I do not intend to save e 3D scene. want to save the VR scene. is there possibility to save the VR scene on sli…

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## [Setting mouse place mode for specific view](https://discourse.slicer.org/t/setting-mouse-place-mode-for-specific-view/4938)

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**Author:** [@jcfr](https://discourse.slicer.org/u/jcfr)\
**Replies:** 13\
**Last updated:** [December 3, 2018, 11:49pm UTC](https://discourse.slicer.org/t/setting-mouse-place-mode-for-specific-view/4938 "2018-12-03T23:49:41Z")

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It is currently possible to globally change the interaction mode (PersistentPlaceMode, SinglePlaceMode, ViewTransformMode) by updating the interaction node singleton. This is exposed to the user using the place mode tool…

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## [Fetching real world postition/orientation of HTC Vive controller/HMD](https://discourse.slicer.org/t/fetching-real-world-postition-orientation-of-htc-vive-controller-hmd/4937)

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**Author:** [@Gaurav\_Kumar](https://discourse.slicer.org/u/Gaurav_Kumar)\
**Replies:** 7\
**Last updated:** [December 3, 2018, 3:51pm UTC](https://discourse.slicer.org/t/fetching-real-world-postition-orientation-of-htc-vive-controller-hmd/4937 "2018-12-03T15:51:07Z")

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Hello! I am trying to create slices using orientation of the HTC Vive HMD/controller loation for some custom visualization. Are the position/orientation of the HTC Vive hardware available through some python code using …

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## [Request for Tutorial for Developing Loadable Module in Slicer](https://discourse.slicer.org/t/request-for-tutorial-for-developing-loadable-module-in-slicer/4931)

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**Author:** [@zhenyu1995](https://discourse.slicer.org/u/zhenyu1995)\
**Replies:** 1\
**Last updated:** [December 3, 2018, 4:36am UTC](https://discourse.slicer.org/t/request-for-tutorial-for-developing-loadable-module-in-slicer/4931 "2018-12-03T04:36:55Z")

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Dear all, My name is Ong Zhen Yu, a Malaysian undergraduate, pursuing bachelor’s degree in electrical and electronics. Currently, me and my team are working on a project to develop a loadable module in slicer to do auto…

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## [SlicerIGT error: Received unknown device type POSITION, device=StylusToReference](https://discourse.slicer.org/t/slicerigt-error-received-unknown-device-type-position-device-stylustoreference/4895)

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**Author:** [@banderies](https://discourse.slicer.org/u/banderies)\
**Replies:** 3\
**Last updated:** [December 3, 2018, 4:10am UTC](https://discourse.slicer.org/t/slicerigt-error-received-unknown-device-type-position-device-stylustoreference/4895 "2018-12-03T04:10:37Z")

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I am receiving an error from VTK when I connect a Polaris Vicra with SlicerIGT: Received unknown device type POSITION, device=StylusToReference. This is on Slicer 4.10.0. I have no problem on Slicer 4.8.1. I noticed that…

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## [Return volume intensity value from tip of tracked stylus](https://discourse.slicer.org/t/return-volume-intensity-value-from-tip-of-tracked-stylus/4894)

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**Author:** [@banderies](https://discourse.slicer.org/u/banderies)\
**Replies:** 2\
**Last updated:** [December 3, 2018, 3:32am UTC](https://discourse.slicer.org/t/return-volume-intensity-value-from-tip-of-tracked-stylus/4894 "2018-12-03T03:32:39Z")

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Hello all, I am using a Polaris Vicra and SlicerIGT to track a NDI stylus/pointer, and I would like to return the intensity value from a volume at the tip of the stylus (the StylusTipToStylus transform). I am sure that …

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## [vtkMRMLModelDisplayableManager issue](https://discourse.slicer.org/t/vtkmrmlmodeldisplayablemanager-issue/4709)

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**Author:** [@smrolfe](https://discourse.slicer.org/u/smrolfe)\
**Replies:** 4\
**Last updated:** [December 1, 2018, 8:53pm UTC](https://discourse.slicer.org/t/vtkmrmlmodeldisplayablemanager-issue/4709 "2018-12-01T20:53:01Z")

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Hello, I would like to identify the picked display node after a fiducial is placed using the markups module. While attempting this, I came across what seems to be a bug in the vtkMRMLModelDisplayableManager. The Pick f…

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## [Custom application does not open module at startup](https://discourse.slicer.org/t/custom-application-does-not-open-module-at-startup/4913)

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**Author:** [@mschumaker](https://discourse.slicer.org/u/mschumaker)\
**Replies:** 14\
**Last updated:** [November 30, 2018, 9:16pm UTC](https://discourse.slicer.org/t/custom-application-does-not-open-module-at-startup/4913 "2018-11-30T21:16:00Z")

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I’ve compiled a custom application using the most recent Slicer commit on MacOS. In my superbuild CMakeList.txt file, I specify a default home module, currently set to Welcome: set(Slicer\_DEFAULT\_HOME\_MODULE “Welcome”) …

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## [How to develope an Extension with no python knowledge?](https://discourse.slicer.org/t/how-to-develope-an-extension-with-no-python-knowledge/2167)

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**Author:** [@timeanddoctor](https://discourse.slicer.org/u/timeanddoctor)\
**Replies:** 2\
**Last updated:** [March 15, 2018, 12:18am UTC](https://discourse.slicer.org/t/how-to-develope-an-extension-with-no-python-knowledge/2167 "2018-03-15T00:18:48Z")

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Operating system: Slicer version: Expected behavior: Actual behavior: how to develope an Extension with no python knowledge?

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## [There is one problem when i convert the data from nifti to nrrd](https://discourse.slicer.org/t/there-is-one-problem-when-i-convert-the-data-from-nifti-to-nrrd/4857)

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**Author:** [@liang23](https://discourse.slicer.org/u/liang23)\
**Replies:** 1\
**Last updated:** [November 23, 2018, 4:58pm UTC](https://discourse.slicer.org/t/there-is-one-problem-when-i-convert-the-data-from-nifti-to-nrrd/4857 "2018-11-23T16:58:19Z")

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Operating system: linux Slicer version:4.10.0 Expected behavior: Actual behavior:

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## [Loading data from Explorer scanner?](https://discourse.slicer.org/t/loading-data-from-explorer-scanner/4838)

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**Author:** [@jcfr](https://discourse.slicer.org/u/jcfr)\
**Replies:** 0\
**Last updated:** [November 21, 2018, 4:54pm UTC](https://discourse.slicer.org/t/loading-data-from-explorer-scanner/4838 "2018-11-21T16:54:00Z")

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When the associated data will be made public, it would be neat to try loading them in Slicer. See https://medicalxpress.com/news/2018-11-human-images-world-total-body-scanner.html and https://explorer.ucdavis.edu/

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## [IGT Volume Reslice Driver Module](https://discourse.slicer.org/t/igt-volume-reslice-driver-module/4839)

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**Author:** [@sfrisken](https://discourse.slicer.org/u/sfrisken)\
**Replies:** 1\
**Last updated:** [November 21, 2018, 7:09pm UTC](https://discourse.slicer.org/t/igt-volume-reslice-driver-module/4839 "2018-11-21T19:09:21Z")

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Operating system: Windows 10 Slicer version: 4.9.0 Expected behavior: Volume Reslice Driver should apply a specified transform (driver) to reslice the views of the current volume and present the slices in the Red, Yell…

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## ["Operation too slow. Less than 1 bytes/sec transferred the last 120 seconds"](https://discourse.slicer.org/t/operation-too-slow-less-than-1-bytes-sec-transferred-the-last-120-seconds/4819)

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**Author:** [@ihnorton](https://discourse.slicer.org/u/ihnorton)\
**Replies:** 1\
**Last updated:** [November 20, 2018, 4:57pm UTC](https://discourse.slicer.org/t/operation-too-slow-less-than-1-bytes-sec-transferred-the-last-120-seconds/4819 "2018-11-20T16:57:56Z")

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I’ve seen this in several extension builds over the past two nights, causing build (or upload?) failure: Operation too slow. Less than 1 bytes/sec transferred the last 120 seconds

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## [SlicerVMTK extension not building with Slicer 4.11 on MacOS](https://discourse.slicer.org/t/slicervmtk-extension-not-building-with-slicer-4-11-on-macos/4643)

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**Author:** [@mschumaker](https://discourse.slicer.org/u/mschumaker)\
**Replies:** 5\
**Last updated:** [November 16, 2018, 9:24pm UTC](https://discourse.slicer.org/t/slicervmtk-extension-not-building-with-slicer-4-11-on-macos/4643 "2018-11-16T21:24:36Z")

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On CDash, the SlicerVMTK extension stopped building after Slicer and VTK changes on Oct 1. All platforms are affected: http://slicer.cdash.org/index.php?project=SlicerPreview&date=2018-11-05&filtercount=1&showfilters=1&f…

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## [Create a Model stl](https://discourse.slicer.org/t/create-a-model-stl/4781)

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**Author:** [@mukatyz](https://discourse.slicer.org/u/mukatyz)\
**Replies:** 1\
**Last updated:** [November 17, 2018, 7:27pm UTC](https://discourse.slicer.org/t/create-a-model-stl/4781 "2018-11-17T19:27:40Z")

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Hi, How can i create a model from stl file, in script python for example whit slicer.util.loadModel() Thanks

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## [ExtensionIndex 4.8 branch is using master for many (most?) extensions](https://discourse.slicer.org/t/extensionindex-4-8-branch-is-using-master-for-many-most-extensions/2222)

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**Author:** [@fedorov](https://discourse.slicer.org/u/fedorov)\
**Replies:** 18\
**Last updated:** [November 16, 2018, 11:40pm UTC](https://discourse.slicer.org/t/extensionindex-4-8-branch-is-using-master-for-many-most-extensions/2222 "2018-11-16T23:40:21Z")

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I noticed that many of the extensions in the ExtensionsIndex 4.8 branch are using master for the extension repo. I initially thought I missed this, but it applies to many popular extensions. This is a big issue consideri…

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## [Elastix via command line](https://discourse.slicer.org/t/elastix-via-command-line/4769)

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**Author:** [@alex](https://discourse.slicer.org/u/alex)\
**Replies:** 3\
**Last updated:** [November 15, 2018, 7:25pm UTC](https://discourse.slicer.org/t/elastix-via-command-line/4769 "2018-11-15T19:25:23Z")

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Hi Andras et al, I truly enjoy the elastix module. Given that have a large amount of data that I would like process, I am looking for easiest way to do this via a command line. Is there anything available that is close …

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## [Using the invert displacement field function](https://discourse.slicer.org/t/using-the-invert-displacement-field-function/4768)

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**Author:** [@RuurdK](https://discourse.slicer.org/u/RuurdK)\
**Replies:** 3\
**Last updated:** [November 15, 2018, 7:18pm UTC](https://discourse.slicer.org/t/using-the-invert-displacement-field-function/4768 "2018-11-15T19:18:58Z")

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Dear all, I have been using the invert button in the Transforms module to invert displacement fields which I can regrettably only derive as a forward transform. Now I am trying to replicate this inversion using ITK or S…

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## [Free Form Deformation](https://discourse.slicer.org/t/free-form-deformation/4503)

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**Author:** [@Abdelkhalek](https://discourse.slicer.org/u/Abdelkhalek)\
**Replies:** 2\
**Last updated:** [October 28, 2018, 12:23pm UTC](https://discourse.slicer.org/t/free-form-deformation/4503 "2018-10-28T12:23:33Z")

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Hi, How can I perform an interaction with widgets consistently in 2D Widgets based on a fast free-form deformation model ? Thank you in advance

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## [No GetStorableNode method in vtkMRMLStorageNode](https://discourse.slicer.org/t/no-getstorablenode-method-in-vtkmrmlstoragenode/4764)

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**Author:** [@Sunderlandkyl](https://discourse.slicer.org/u/Sunderlandkyl)\
**Replies:** 2\
**Last updated:** [November 14, 2018, 7:15pm UTC](https://discourse.slicer.org/t/no-getstorablenode-method-in-vtkmrmlstoragenode/4764 "2018-11-14T19:15:18Z")

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In the case of vtkMRMLDisplayNode, there is a GetDisplayableNode() method. Is there any reason why there isn’t, or couldn’t be a corresponding GetStorableNode() method in vtkMRMLStorageNode?

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## [How to change the color of markup node from python script?](https://discourse.slicer.org/t/how-to-change-the-color-of-markup-node-from-python-script/4762)

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**Author:** [@brhoom](https://discourse.slicer.org/u/brhoom)\
**Replies:** 3\
**Last updated:** [November 14, 2018, 5:54pm UTC](https://discourse.slicer.org/t/how-to-change-the-color-of-markup-node-from-python-script/4762 "2018-11-14T17:54:02Z")

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Operating system: Ubuntu Slicer version: 4.10 Expected behavior: Color changed Actual behavior: does not Hi, I am trying to change the color and the text scale of a markup node. the text scale works but the color do…

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## [Landmark Registration Module](https://discourse.slicer.org/t/landmark-registration-module/4755)

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**Author:** [@adelmo](https://discourse.slicer.org/u/adelmo)\
**Replies:** 1\
**Last updated:** [November 14, 2018, 2:13pm UTC](https://discourse.slicer.org/t/landmark-registration-module/4755 "2018-11-14T14:13:59Z")

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Good morning developers, First of all, I wanted to thank you for all the great work you are doing on 3D Slicer and the support you provide. I recently tried to move all of my team works from Slicer 4.8 to the new stabl…

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## [Setting new active scalar does not always show](https://discourse.slicer.org/t/setting-new-active-scalar-does-not-always-show/4678)

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**Author:** [@Niels](https://discourse.slicer.org/u/Niels)\
**Replies:** 2\
**Last updated:** [November 8, 2018, 2:15pm UTC](https://discourse.slicer.org/t/setting-new-active-scalar-does-not-always-show/4678 "2018-11-08T14:15:11Z")

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In python I change the scalar of my new model. this works fine at first, but when I regenerate the model and scalar values it does not show directly the second time. In the model UI I see the correct scalar being selecte…

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## [Should I build Qt 5.10 from source on Linux?](https://discourse.slicer.org/t/should-i-build-qt-5-10-from-source-on-linux/2484)

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**Author:** [@gaoyi.cn](https://discourse.slicer.org/u/gaoyi.cn)\
**Replies:** 8\
**Last updated:** [November 7, 2018, 4:48pm UTC](https://discourse.slicer.org/t/should-i-build-qt-5-10-from-source-on-linux/2484 "2018-11-07T16:48:11Z")

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## [front view desugned](https://discourse.slicer.org/t/front-view-desugned/4653)

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**Author:** [@srinivas](https://discourse.slicer.org/u/srinivas)\
**Replies:** 1\
**Last updated:** [November 6, 2018, 12:30pm UTC](https://discourse.slicer.org/t/front-view-desugned/4653 "2018-11-06T12:30:41Z")

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Operating system: Slicer version: Expected behavior: Actual behavior: sir, how you designed tat first view of the software were you are getting the 4 square of different colors with the editing part please can you …

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## [Intermitten crash with qMRMLTreeView index's in python](https://discourse.slicer.org/t/intermitten-crash-with-qmrmltreeview-indexs-in-python/4549)

<div class="topic-metadata">

**Author:** [@jamesjcook](https://discourse.slicer.org/u/jamesjcook)\
**Replies:** 8\
**Last updated:** [November 2, 2018, 5:13pm UTC](https://discourse.slicer.org/t/intermitten-crash-with-qmrmltreeview-indexs-in-python/4549 "2018-11-02T17:13:37Z")

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I’m working on a custom application that has a qMRMLTreeView in a scripted python module. I’m using this to view models and hierarchies and fibers. I want to see when users enable/disable a model/hierarchy/fiber, and ma…

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## [DICOM scalar volume load: irregular geometry warning overly stringent?](https://discourse.slicer.org/t/dicom-scalar-volume-load-irregular-geometry-warning-overly-stringent/3761)

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**Author:** [@fedorov](https://discourse.slicer.org/u/fedorov)\
**Replies:** 15\
**Last updated:** [November 2, 2018, 3:45pm UTC](https://discourse.slicer.org/t/dicom-scalar-volume-load-irregular-geometry-warning-overly-stringent/3761 "2018-11-02T15:45:21Z")

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I noticed that geometry mismatch reporting is overly stringent in reporting errors: Irregular volume geometry detected, but maximum error is within tolerance (maximum error of 5.17578e-08 mm, tolerance threshold…

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