# Development

**URL:** https://discourse.slicer.org/c/dev/5.md?no_subcategories=false&page=114

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

**Page:** 115

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## [Building/Running 3D slicer with Slicer\_SUPERBUILD=OFF](https://discourse.slicer.org/t/building-running-3d-slicer-with-slicer-superbuild-off/2502)

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**Author:** [@RafaelPalomar](https://discourse.slicer.org/u/RafaelPalomar)\
**Replies:** 5\
**Last updated:** [November 2, 2018, 3:05pm UTC](https://discourse.slicer.org/t/building-running-3d-slicer-with-slicer-superbuild-off/2502 "2018-11-02T15:05:31Z")

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Hi everyone, I’ve managed to build 3DSlicer without the super-build mode by packaging/installing some of the underlying libraries for my Linux OS (Gentoo) and using some of the system libraries. After setting up the LD\_…

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## [How can I export to a segmentation to OBJ file using Python?](https://discourse.slicer.org/t/how-can-i-export-to-a-segmentation-to-obj-file-using-python/4576)

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**Author:** [@mikebind](https://discourse.slicer.org/u/mikebind)\
**Replies:** 2\
**Last updated:** [October 31, 2018, 3:09pm UTC](https://discourse.slicer.org/t/how-can-i-export-to-a-segmentation-to-obj-file-using-python/4576 "2018-10-31T15:09:09Z")

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I have several segmentations and would like to export each to an OBJ file. The segmentations were created by segmenting each frame of a Sequence of image volumes. The segmentations are not currently organized into a Se…

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## [Packaging SlicerVMTK extension with custom Slicer build](https://discourse.slicer.org/t/packaging-slicervmtk-extension-with-custom-slicer-build/3639)

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**Author:** [@mschumaker](https://discourse.slicer.org/u/mschumaker)\
**Replies:** 41\
**Last updated:** [October 31, 2018, 2:23pm UTC](https://discourse.slicer.org/t/packaging-slicervmtk-extension-with-custom-slicer-build/3639 "2018-10-31T14:23:33Z")

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I have added a Slicer\_EXTENSION\_SOURCE\_DIRS entry to my CMakeCache.txt for a Slicer build (Aug 1 nightly). I have entered the source directory for one extension, the SlicerExtension-VMTK, which depends on the external VM…

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## [Using segmentstatistics module in python script](https://discourse.slicer.org/t/using-segmentstatistics-module-in-python-script/2140)

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**Author:** [@brhoom](https://discourse.slicer.org/u/brhoom)\
**Replies:** 5\
**Last updated:** [October 30, 2018, 5:18am UTC](https://discourse.slicer.org/t/using-segmentstatistics-module-in-python-script/2140 "2018-10-30T05:18:22Z")

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Dear all, How can I call and use segmentstatistics module in a simple way. I tried this code but I get an error volSeg = slicer.util.getNode('Segmentation') volInput = self.inputSelector.currentNode() …

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## [Document modules using mkdocs](https://discourse.slicer.org/t/document-modules-using-mkdocs/1205)

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**Author:** [@Lorensen](https://discourse.slicer.org/u/Lorensen)\
**Replies:** 8\
**Last updated:** [October 29, 2018, 8:30pm UTC](https://discourse.slicer.org/t/document-modules-using-mkdocs/1205 "2018-10-29T20:30:01Z")

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## [Slicer 4.10 not starting after fresh build](https://discourse.slicer.org/t/slicer-4-10-not-starting-after-fresh-build/4558)

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**Author:** [@christian](https://discourse.slicer.org/u/christian)\
**Replies:** 4\
**Last updated:** [October 29, 2018, 8:19pm UTC](https://discourse.slicer.org/t/slicer-4-10-not-starting-after-fresh-build/4558 "2018-10-29T20:19:40Z")

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Hi, I just build Slicer 4.10 with Qt5 and VTK8 from source on a linux machine (Linux Mint 19). The problem is that Slicer does not start and throws this message: ./Slicer-build/Slicer qt5ct: using qt5ct plugin error: …

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## [Highlighted VTK changes associated with Slicer 4.10: Virtual Reality, Rendering, Volume Rendering, Python Wraping, OpenGL performance and threading management](https://discourse.slicer.org/t/highlighted-vtk-changes-associated-with-slicer-4-10-virtual-reality-rendering-volume-rendering-python-wraping-opengl-performance-and-threading-management/4574)

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**Author:** [@jcfr](https://discourse.slicer.org/u/jcfr)\
**Replies:** 0\
**Last updated:** [October 29, 2018, 6:43pm UTC](https://discourse.slicer.org/t/highlighted-vtk-changes-associated-with-slicer-4-10-virtual-reality-rendering-volume-rendering-python-wraping-opengl-performance-and-threading-management/4574 "2018-10-29T18:43:25Z")

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This post highlights some of the recent VTK changes included in Slicer 4.10 Blogs Build Chart IO OpenVR Performance Python Wrapping QVTKOpenGLWidget Rendering: Volume Rendering Fixes Widgets Blogs Rendering transluce…

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## [Drag and drop of contour from a 2D view](https://discourse.slicer.org/t/drag-and-drop-of-contour-from-a-2d-view/4570)

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**Author:** [@Abdelkhalek](https://discourse.slicer.org/u/Abdelkhalek)\
**Replies:** 0\
**Last updated:** [October 29, 2018, 12:27pm UTC](https://discourse.slicer.org/t/drag-and-drop-of-contour-from-a-2d-view/4570 "2018-10-29T12:27:38Z")

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Hi, How can I perform a drag and drop of a mesh contour from a 2D view (example initial contour is attached). Is there any example or portion of code which allow me to achieve this point, please?

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## [Ubuntu 18.04 scaling small issues](https://discourse.slicer.org/t/ubuntu-18-04-scaling-small-issues/2622)

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**Author:** [@Davide\_Punzo](https://discourse.slicer.org/u/Davide_Punzo)\
**Replies:** 8\
**Last updated:** [October 28, 2018, 4:13pm UTC](https://discourse.slicer.org/t/ubuntu-18-04-scaling-small-issues/2622 "2018-10-28T16:13:58Z")

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Hi all, I personally don’t use 4k monitors, however I have just tried running Slicer in a 4k monitor on ubuntu 18.04 with the scaling option (recently added in ubuntu, 200%). This is the result: it kind of works, …

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## [Load Dicom Image and a mesh](https://discourse.slicer.org/t/load-dicom-image-and-a-mesh/4468)

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**Author:** [@Abdelkhalek](https://discourse.slicer.org/u/Abdelkhalek)\
**Replies:** 11\
**Last updated:** [October 27, 2018, 8:28pm UTC](https://discourse.slicer.org/t/load-dicom-image-and-a-mesh/4468 "2018-10-27T20:28:37Z")

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Hi, how can I create a .py script in order to create a button for loading a .mha, .hdr files and a button for .stl and .vtk files, please?

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## [FYI : building Slicer with GCC 8.1](https://discourse.slicer.org/t/fyi-building-slicer-with-gcc-8-1/2830)

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**Author:** [@chir.set](https://discourse.slicer.org/u/chir.set)\
**Replies:** 3\
**Last updated:** [October 25, 2018, 12:09am UTC](https://discourse.slicer.org/t/fyi-building-slicer-with-gcc-8-1/2830 "2018-10-25T00:09:45Z")

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Building Slicer with GCC 8.1.0 on Arch Linux succeeds with these three patches. Use Python 2.7.15. Versions 2.7.{13,14} do not compile. diff --git a/CMake/CTestCustom.cmake.in b/CMake/CTestCustom.cmake.in index 96dde…

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## [Strange results in model segmentation to label map](https://discourse.slicer.org/t/strange-results-in-model-segmentation-to-label-map/4518)

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**Author:** [@Niels](https://discourse.slicer.org/u/Niels)\
**Replies:** 4\
**Last updated:** [October 24, 2018, 5:49pm UTC](https://discourse.slicer.org/t/strange-results-in-model-segmentation-to-label-map/4518 "2018-10-24T17:49:19Z")

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Hello, I installed Slicer 4.11.0-2018-10-20 (revision 27509) macosx-amd64. I imported a model as a segmentation and exported this to a labelmap. Using these steps: Does anybody have an idea where is coming from?

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## [Improving resolution of icons and various images in Slicer](https://discourse.slicer.org/t/improving-resolution-of-icons-and-various-images-in-slicer/4512)

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**Author:** [@jamesobutler](https://discourse.slicer.org/u/jamesobutler)\
**Replies:** 3\
**Last updated:** [October 23, 2018, 11:05pm UTC](https://discourse.slicer.org/t/improving-resolution-of-icons-and-various-images-in-slicer/4512 "2018-10-23T23:05:07Z")

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With Slicer 4.10.0 and the transition to Qt5, there is greatly improved scaling of widgets for higher DPI monitors (I know a user with a 4K monitor), however various icons in those scaled widgets now appear blurry. Icon…

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## [Google Season of Docs: Anyone else interested in being a mentor?](https://discourse.slicer.org/t/google-season-of-docs-anyone-else-interested-in-being-a-mentor/4490)

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**Author:** [@jcfr](https://discourse.slicer.org/u/jcfr)\
**Replies:** 1\
**Last updated:** [October 23, 2018, 6:19pm UTC](https://discourse.slicer.org/t/google-season-of-docs-anyone-else-interested-in-being-a-mentor/4490 "2018-10-23T18:19:02Z")

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Later this afternoon, I plan on submitting 3D Slicer as a project for the Google Season of Docs. See presentation Below are the answers I plan to submit for the Google Season of Docs: Proposal for comment: The OSS pro…

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## [SlicerPathReconstruction not being built nightly?](https://discourse.slicer.org/t/slicerpathreconstruction-not-being-built-nightly/4066)

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**Author:** [@tavaughan](https://discourse.slicer.org/u/tavaughan)\
**Replies:** 2\
**Last updated:** [October 23, 2018, 5:23pm UTC](https://discourse.slicer.org/t/slicerpathreconstruction-not-being-built-nightly/4066 "2018-10-23T17:23:25Z")

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I added a new extension called PathReconstruction to the index a few days ago. Unfortunately I can’t find the nightly build for PathReconstruction for Windows on cdash. I can see it for Linux and Mac. It looks like all t…

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## [Slicer 4.9 MAC ox not longer there](https://discourse.slicer.org/t/slicer-4-9-mac-ox-not-longer-there/4499)

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**Author:** [@Ash\_Alarfaj](https://discourse.slicer.org/u/Ash_Alarfaj)\
**Replies:** 3\
**Last updated:** [October 23, 2018, 1:39pm UTC](https://discourse.slicer.org/t/slicer-4-9-mac-ox-not-longer-there/4499 "2018-10-23T13:39:11Z")

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Hi I’ve downloaded and worked on both versions 4.8 and 4.9, but I’ve recognized that version 4.9 not in your download page and the nightly version for mac ox is 4.11. that means version 4.9 not okay?

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## [Has anyone tested a nightly build on windows server 2016?](https://discourse.slicer.org/t/has-anyone-tested-a-nightly-build-on-windows-server-2016/4489)

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**Author:** [@jamesjcook](https://discourse.slicer.org/u/jamesjcook)\
**Replies:** 2\
**Last updated:** [October 23, 2018, 1:25pm UTC](https://discourse.slicer.org/t/has-anyone-tested-a-nightly-build-on-windows-server-2016/4489 "2018-10-23T13:25:24Z")

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I’m getting ready to set up a new development VM and would love to know if anyone has traveled this path and failed ahead of me. Has anyone tried to build on a window server 2016 system? I’ll be following the nightly in…

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## [Slicer 4.11 still looks for 4.9 lib dir](https://discourse.slicer.org/t/slicer-4-11-still-looks-for-4-9-lib-dir/4476)

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**Author:** [@chir.set](https://discourse.slicer.org/u/chir.set)\
**Replies:** 2\
**Last updated:** [October 21, 2018, 6:14am UTC](https://discourse.slicer.org/t/slicer-4-11-still-looks-for-4-9-lib-dir/4476 "2018-10-21T06:14:54Z")

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Built Slicer from git on Arch Linux. It does not start with Slicer executable. I have to set LD\_LIBRARY\_PATH to \<install\_path\>/lib/Slicer-4.11 for it to run. Then the title bar still shows 4.9.0, while the about box show…

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## [Why don't we see Linux test result reported on CDash?](https://discourse.slicer.org/t/why-dont-we-see-linux-test-result-reported-on-cdash/4446)

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**Author:** [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Replies:** 2\
**Last updated:** [October 17, 2018, 6:06pm UTC](https://discourse.slicer.org/t/why-dont-we-see-linux-test-result-reported-on-cdash/4446 "2018-10-17T18:06:49Z")

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Why don’t we see Linux test results?

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## [Update: Toward Slicer 4.10.0](https://discourse.slicer.org/t/update-toward-slicer-4-10-0/2486)

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**Author:** [@jcfr](https://discourse.slicer.org/u/jcfr)\
**Replies:** 5\
**Last updated:** [October 17, 2018, 5:52pm UTC](https://discourse.slicer.org/t/update-toward-slicer-4-10-0/2486 "2018-10-17T17:52:35Z")

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release status We are getting close ! Thanks you everyone :+1: But considering that: the last VTK update addressing the #4510 (Cropping is broken with GPU Volume rendering if depth peeling is enabled), also introduce…

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## [Model fixing in VR space](https://discourse.slicer.org/t/model-fixing-in-vr-space/4419)

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**Author:** [@M\_pavi](https://discourse.slicer.org/u/M_pavi)\
**Replies:** 4\
**Last updated:** [October 16, 2018, 11:35pm UTC](https://discourse.slicer.org/t/model-fixing-in-vr-space/4419 "2018-10-16T23:35:52Z")

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How do we fix the model in VR space without moving anywhere? IUsusally when we move the model using controllers we can move it. But I want to fix the model in the surface.

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## [Change virtual reality view background color](https://discourse.slicer.org/t/change-virtual-reality-view-background-color/4418)

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**Author:** [@M\_pavi](https://discourse.slicer.org/u/M_pavi)\
**Replies:** 2\
**Last updated:** [October 16, 2018, 10:45pm UTC](https://discourse.slicer.org/t/change-virtual-reality-view-background-color/4418 "2018-10-16T22:45:24Z")

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Hi I want to change the background color in VR view. I can change the color in the 3D view using your example code but when I change color in 3D view it does not show in VR view. I am using HTC VIVE

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## [SlicerDMRI not building on metroplex/linux](https://discourse.slicer.org/t/slicerdmri-not-building-on-metroplex-linux/4362)

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**Author:** [@ihnorton](https://discourse.slicer.org/u/ihnorton)\
**Replies:** 7\
**Last updated:** [October 16, 2018, 10:17pm UTC](https://discourse.slicer.org/t/slicerdmri-not-building-on-metroplex-linux/4362 "2018-10-16T22:17:44Z")

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@jcfr @Sam\_Horvath our SlicerDMRI extension is not building on linux (metroplex) since 2018-10-05. Can you investigate please? There is no entry at all on the dashboard for the next days (but it is building on vasstbuild…

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## [Correction to SlicerIGT slide U05](https://discourse.slicer.org/t/correction-to-slicerigt-slide-u05/4404)

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**Author:** [@kamrul079](https://discourse.slicer.org/u/kamrul079)\
**Replies:** 4\
**Last updated:** [October 16, 2018, 7:13pm UTC](https://discourse.slicer.org/t/correction-to-slicerigt-slide-u05/4404 "2018-10-16T19:13:06Z")

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SlicerIGT tutorial U05- Command Line Interface has an issue. I tried several times as it has been mentioned about “EditSeqMetafile”. But there is no such file in the PlusServer bin folder. Correction: “EditSequenceFile” …

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## [Static build of Qt5 to update the application launcher and support interactive process](https://discourse.slicer.org/t/static-build-of-qt5-to-update-the-application-launcher-and-support-interactive-process/3801)

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**Author:** [@jcfr](https://discourse.slicer.org/u/jcfr)\
**Replies:** 16\
**Last updated:** [October 13, 2018, 8:19am UTC](https://discourse.slicer.org/t/static-build-of-qt5-to-update-the-application-launcher-and-support-interactive-process/3801 "2018-10-13T08:19:34Z")

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Short version Help is needed to do a 32-bit static build of Qt5 on Windows. See link error at the end of this post. Indeed, building against a static build of Qt4 is not sufficient anymore because the function QProcess:…

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## [2018.10.12: Do not expect macOS nightly build](https://discourse.slicer.org/t/2018-10-12-do-not-expect-macos-nightly-build/4370)

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**Author:** [@jcfr](https://discourse.slicer.org/u/jcfr)\
**Replies:** 1\
**Last updated:** [October 11, 2018, 9:41pm UTC](https://discourse.slicer.org/t/2018-10-12-do-not-expect-macos-nightly-build/4370 "2018-10-11T21:41:37Z")

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Considering that we lost power in our north carolina Kitware office, the build machine in charge of building Slicer on macOS is turned off.

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## [Creating volumeNode with scalars as RGB](https://discourse.slicer.org/t/creating-volumenode-with-scalars-as-rgb/4359)

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**Author:** [@Niels](https://discourse.slicer.org/u/Niels)\
**Replies:** 3\
**Last updated:** [October 11, 2018, 6:09pm UTC](https://discourse.slicer.org/t/creating-volumenode-with-scalars-as-rgb/4359 "2018-10-11T18:09:26Z")

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Apart from the colormaps (that I use allot) would it be possible to create a volume which specifies an RGB color? Currently my volume has only one scalar, but maybe I can use 3 scalars to describe and display RGB?

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## [Copy model display node](https://discourse.slicer.org/t/copy-model-display-node/4355)

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**Author:** [@Niels](https://discourse.slicer.org/u/Niels)\
**Replies:** 1\
**Last updated:** [October 11, 2018, 12:52pm UTC](https://discourse.slicer.org/t/copy-model-display-node/4355 "2018-10-11T12:52:16Z")

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I have a generated a new model derived from a source model. I want the new display properties (including selected scalars) of the target model to be the same as the source model. I tried various Copy functions with no su…

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## [Use progress bar from python](https://discourse.slicer.org/t/use-progress-bar-from-python/4343)

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**Author:** [@Niels](https://discourse.slicer.org/u/Niels)\
**Replies:** 3\
**Last updated:** [October 11, 2018, 12:27pm UTC](https://discourse.slicer.org/t/use-progress-bar-from-python/4343 "2018-10-11T12:27:00Z")

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The python code in my logic class can take some time to finish its calculations. I would like to add a progress bar in the UI. Is there any way to work with a progressbar info from python?

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## [Markups Module enhancements](https://discourse.slicer.org/t/markups-module-enhancements/4335)

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**Author:** [@smrolfe](https://discourse.slicer.org/u/smrolfe)\
**Replies:** 5\
**Last updated:** [October 10, 2018, 4:30am UTC](https://discourse.slicer.org/t/markups-module-enhancements/4335 "2018-10-10T04:30:13Z")

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Hello Slicer Developers, I would like to tackle some improvements to the markups module. This was discussed in the thread: https://discourse.slicer.org/t/a-users-proposal-for-markups-module-enhancements/ Before I jump…

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