# Development

**URL:** https://discourse.slicer.org/c/dev/5.md?no_subcategories=false&page=128

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

**Page:** 129

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## [The program (4.7.0 nightly) is slowly working in my notebook. What sould I do?](https://discourse.slicer.org/t/the-program-4-7-0-nightly-is-slowly-working-in-my-notebook-what-sould-i-do/602)

<div class="topic-metadata">

**Author:** [@vetyasin](https://discourse.slicer.org/u/vetyasin)\
**Replies:** 2\
**Last updated:** [July 1, 2017, 12:11am UTC](https://discourse.slicer.org/t/the-program-4-7-0-nightly-is-slowly-working-in-my-notebook-what-sould-i-do/602 "2017-07-01T00:11:59Z")

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Hi. My operating system: Windows Ultimate 7 64 bit, 2.66-2.93 (Turbo) Ghz, 256 Gb SSD, i5, 6 Gb RAM. The program is slowly working or freezing in processes of volume rendering, 3D model imaging etc. What sould I do ? …

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## [Is there any way to draw hundreds of balls with different colors?](https://discourse.slicer.org/t/is-there-any-way-to-draw-hundreds-of-balls-with-different-colors/572)

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**Author:** [@wpgao](https://discourse.slicer.org/u/wpgao)\
**Replies:** 8\
**Last updated:** [June 30, 2017, 5:12am UTC](https://discourse.slicer.org/t/is-there-any-way-to-draw-hundreds-of-balls-with-different-colors/572 "2017-06-30T05:12:10Z")

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Is there any way to draw hundreds of balls with different colors more efficiently? I had obtained the position information from the sensor and hope to illustrate the data using the ball in 3D View. There is hundreds of b…

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## [Strange Behaviour Scripting with Curve Maker Extension \[Solved\]](https://discourse.slicer.org/t/strange-behaviour-scripting-with-curve-maker-extension-solved/575)

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**Author:** [@\_jmichael](https://discourse.slicer.org/u/_jmichael)\
**Replies:** 3\
**Last updated:** [June 27, 2017, 1:53pm UTC](https://discourse.slicer.org/t/strange-behaviour-scripting-with-curve-maker-extension-solved/575 "2017-06-27T13:53:35Z")

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I'm working with the 3D slicer extension CurveMaker that makes line/curve models based on fiducials. I wrote a simple convenience function (below) in python that sends all of the sets of MarkupsFiducial in the scene to C…

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## [Custom Slicer distributions](https://discourse.slicer.org/t/custom-slicer-distributions/559)

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**Author:** [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Replies:** 20\
**Last updated:** [June 24, 2017, 1:26am UTC](https://discourse.slicer.org/t/custom-slicer-distributions/559 "2017-06-24T01:26:17Z")

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Goal of "SlicerVerse" ("Slicer universe") is to offer custom Slicer distributions built on the same Slicer core but pre-configuret for specific applications (https://discourse.slicer.org/t/communities-slicerverse/40/22). …

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## [Slicer DICOM Scalar volume plugin relies on (old) GDCM: why do we not use DCMTK?](https://discourse.slicer.org/t/slicer-dicom-scalar-volume-plugin-relies-on-old-gdcm-why-do-we-not-use-dcmtk/354)

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**Author:** [@fedorov](https://discourse.slicer.org/u/fedorov)\
**Replies:** 23\
**Last updated:** [June 23, 2017, 4:25pm UTC](https://discourse.slicer.org/t/slicer-dicom-scalar-volume-plugin-relies-on-old-gdcm-why-do-we-not-use-dcmtk/354 "2017-06-23T16:25:56Z")

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This question came up several times, and I would like to document the answer - why do we rely on GDCM series reader in this code: https://github.com/Slicer/Slicer/blob/master/Libs/vtkITK/vtkITKArchetypeImageSeriesScalarR…

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## [Point's coordinates between two registered images](https://discourse.slicer.org/t/points-coordinates-between-two-registered-images/544)

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**Author:** [@sandra](https://discourse.slicer.org/u/sandra)\
**Replies:** 4\
**Last updated:** [June 22, 2017, 12:40pm UTC](https://discourse.slicer.org/t/points-coordinates-between-two-registered-images/544 "2017-06-22T12:40:35Z")

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Hi! I have two images registered together and I would like to, given the IJK coordinates of a point in the first image, get its IJK coordinates in the second one. To do so, I did this: firstVolume-\>GetIJKToRASMatri…

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## [CLI linking error](https://discourse.slicer.org/t/cli-linking-error/542)

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**Author:** [@prisgdd](https://discourse.slicer.org/u/prisgdd)\
**Replies:** 8\
**Last updated:** [June 21, 2017, 8:41pm UTC](https://discourse.slicer.org/t/cli-linking-error/542 "2017-06-21T20:41:20Z")

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I am currently trying to package my extension with Qt scripted modules and CLI modules. The packaging process is successfull. Then, when I use the CLI, I have the following linking error: dyld: Library not loaded: @rp…

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## [Proposed new "executable" tag in SlicerExecutionModel](https://discourse.slicer.org/t/proposed-new-executable-tag-in-slicerexecutionmodel/466)

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**Author:** [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Replies:** 2\
**Last updated:** [June 21, 2017, 2:28pm UTC](https://discourse.slicer.org/t/proposed-new-executable-tag-in-slicerexecutionmodel/466 "2017-06-21T14:28:13Z")

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What this executables tag refers to and what would it be used for? It seems that the value specify what language the module is implemented in, but that should not matter much - you can compile python code to be an exe …

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## [Building Slicer on windows with VS2017](https://discourse.slicer.org/t/building-slicer-on-windows-with-vs2017/534)

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**Author:** [@Brad-Davis](https://discourse.slicer.org/u/Brad-Davis)\
**Replies:** 1\
**Last updated:** [June 20, 2017, 2:56am UTC](https://discourse.slicer.org/t/building-slicer-on-windows-with-vs2017/534 "2017-06-20T02:56:24Z")

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I'm attempting to compile slicer with VS2017, and I'm realizing the tutorials as well as the QT builds are for VS2013, is there any way around this that would work. I'm guessing, being pretty new to compiling, that I sho…

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## [Automate Slicer functions](https://discourse.slicer.org/t/automate-slicer-functions/528)

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**Author:** [@f.cnunez](https://discourse.slicer.org/u/f.cnunez)\
**Replies:** 3\
**Last updated:** [June 19, 2017, 7:56pm UTC](https://discourse.slicer.org/t/automate-slicer-functions/528 "2017-06-19T19:56:31Z")

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Hi all, I was developing as my final degree project a OpenIGTLink communication between a software called ORB-SLAM2 and 3DSlicer(to pass a series of transforms). I have made the communication successfully but I have to …

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## [Cannot create a socket](https://discourse.slicer.org/t/cannot-create-a-socket/510)

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**Author:** [@f.cnunez](https://discourse.slicer.org/u/f.cnunez)\
**Replies:** 14\
**Last updated:** [June 16, 2017, 6:26pm UTC](https://discourse.slicer.org/t/cannot-create-a-socket/510 "2017-06-16T18:26:49Z")

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Hi all, I was trying to communicate a software called ORB-SLAM2 with Slicer using OpenIGTLink library to pass the transform information of the camera movement to Slicer. I have the following code integrated in ORB-SLAM2…

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## [What scene views are supposed to do?](https://discourse.slicer.org/t/what-scene-views-are-supposed-to-do/497)

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**Author:** [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Replies:** 16\
**Last updated:** [June 15, 2017, 6:32pm UTC](https://discourse.slicer.org/t/what-scene-views-are-supposed-to-do/497 "2017-06-15T18:32:25Z")

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We experienced many problems related to scene views, seen many workarounds in many places in the code, and there are many open issues caused by or related to scene views. The main problem seems to be that it is unclear…

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## [Including header files (in an extension build)](https://discourse.slicer.org/t/including-header-files-in-an-extension-build/492)

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**Author:** [@lcoram](https://discourse.slicer.org/u/lcoram)\
**Replies:** 7\
**Last updated:** [June 13, 2017, 10:31pm UTC](https://discourse.slicer.org/t/including-header-files-in-an-extension-build/492 "2017-06-13T22:31:08Z")

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Hi All, I have an extension which contains two modules. One of these modules has a folder "ITKFilters" which contains .h and .hxx files. These don't get built, but need to be linked. We used to recompile ITK with the f…

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## [Relationship between pixels and mm from Matlab](https://discourse.slicer.org/t/relationship-between-pixels-and-mm-from-matlab/427)

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**Author:** [@Marina\_CM](https://discourse.slicer.org/u/Marina_CM)\
**Replies:** 5\
**Last updated:** [June 6, 2017, 4:28pm UTC](https://discourse.slicer.org/t/relationship-between-pixels-and-mm-from-matlab/427 "2017-06-06T16:28:49Z")

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## [Sample data wiki download URL changed](https://discourse.slicer.org/t/sample-data-wiki-download-url-changed/438)

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**Author:** [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Replies:** 7\
**Last updated:** [June 4, 2017, 2:19am UTC](https://discourse.slicer.org/t/sample-data-wiki-download-url-changed/438 "2017-06-04T02:19:53Z")

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Slicer fails to download sample data from the wiki that causes many errors (for example http://trunk.cdash.org/viewTest.php?onlyfailed&buildid=1036019). URLs that used to work before yesterday: http://www.slicer.org/sl…

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## [Extract labelmap contour](https://discourse.slicer.org/t/extract-labelmap-contour/410)

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**Author:** [@DanC](https://discourse.slicer.org/u/DanC)\
**Replies:** 10\
**Last updated:** [June 3, 2017, 5:58pm UTC](https://discourse.slicer.org/t/extract-labelmap-contour/410 "2017-06-03T17:58:53Z")

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Hi. I would like to extract the contour of the labelmap saved in a nrrd file using itk filters. It seems that the toggle button for the label map in the reslice viewers has this functionality. Is there a sample code of t…

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## [Source vs. Header: ITK OpenCV Image Bridge](https://discourse.slicer.org/t/source-vs-header-itk-opencv-image-bridge/428)

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**Author:** [@tdiprima](https://discourse.slicer.org/u/tdiprima)\
**Replies:** 2\
**Last updated:** [June 2, 2017, 8:15pm UTC](https://discourse.slicer.org/t/source-vs-header-itk-opencv-image-bridge/428 "2017-06-02T20:15:18Z")

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I have a C++ header file and a source file. I’m including itkOpenCVImageBridge.h"\`. The include compiles as long as it’s in the source file. I can’t put it in the header. We want to put all the source in the header, …

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## [Help with Accessing Module Logic in Python Scripted Modules](https://discourse.slicer.org/t/help-with-accessing-module-logic-in-python-scripted-modules/409)

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**Author:** [@\_jmichael](https://discourse.slicer.org/u/_jmichael)\
**Replies:** 5\
**Last updated:** [June 2, 2017, 7:24pm UTC](https://discourse.slicer.org/t/help-with-accessing-module-logic-in-python-scripted-modules/409 "2017-06-02T19:24:02Z")

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Hi folks, I’m just getting started with slicer and python and I’m hoping to get some help regarding how to access the underlying logic of Slicer modules from within a python script? (i.e. the Python interactor or the py…

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## [Matlab bridge extension - Module execution error](https://discourse.slicer.org/t/matlab-bridge-extension-module-execution-error/402)

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**Author:** [@Marina\_CM](https://discourse.slicer.org/u/Marina_CM)\
**Replies:** 4\
**Last updated:** [May 30, 2017, 9:01pm UTC](https://discourse.slicer.org/t/matlab-bridge-extension-module-execution-error/402 "2017-05-30T21:01:20Z")

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Operating system: iOS10.3.2 Slicer version: 4.6.2 Expected behavior: Matlab module executes properly Actual behavior: “Completed with errors” Dear team, I’m trying to create a Matlab module for Slicer with Matlab Br…

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## [Slicer compile behind proxy (clone into dcmtk through http)](https://discourse.slicer.org/t/slicer-compile-behind-proxy-clone-into-dcmtk-through-http/423)

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**Author:** [@tpenzkofer](https://discourse.slicer.org/u/tpenzkofer)\
**Replies:** 4\
**Last updated:** [June 2, 2017, 3:20pm UTC](https://discourse.slicer.org/t/slicer-compile-behind-proxy-clone-into-dcmtk-through-http/423 "2017-06-02T15:20:22Z")

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Operating system: Ubuntu 16.04 Slicer version: Git Expected behavior: compiles Actual behavior: does not compile (does not clone into dcmtk through http) Hi all, I just set up a new development environment which sits…

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## [Synchronize slice views widgets with widgets created in the Python console](https://discourse.slicer.org/t/synchronize-slice-views-widgets-with-widgets-created-in-the-python-console/424)

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**Author:** [@Fernando](https://discourse.slicer.org/u/Fernando)\
**Replies:** 3\
**Last updated:** [June 2, 2017, 2:32pm UTC](https://discourse.slicer.org/t/synchronize-slice-views-widgets-with-widgets-created-in-the-python-console/424 "2017-06-02T14:32:35Z")

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Hi all, I would like to use Python to synchronize a custom qMRMLNodeComboBox with, for example, the Foreground combo box of the Green slice view. Same thing with a slider for the opacity. So when I modify the node in m…

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## [Building Slicer behind a firewall](https://discourse.slicer.org/t/building-slicer-behind-a-firewall/385)

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**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 14\
**Last updated:** [May 26, 2017, 3:59pm UTC](https://discourse.slicer.org/t/building-slicer-behind-a-firewall/385 "2017-05-26T15:59:10Z")

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Hi, I am trying to build Slicer from the source. I have a centos 7.3 VM at home, and instructions things worked out well until the point it ran out of space during the superbuild of ITK. Right now I am repeating the tas…

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## [Poll: How do you (re)generate s4ext file for Slicer ExtensionsIndex?](https://discourse.slicer.org/t/poll-how-do-you-re-generate-s4ext-file-for-slicer-extensionsindex/381)

<div class="topic-metadata">

**Author:** [@fedorov](https://discourse.slicer.org/u/fedorov)\
**Replies:** 3\
**Last updated:** [May 25, 2017, 12:33am UTC](https://discourse.slicer.org/t/poll-how-do-you-re-generate-s4ext-file-for-slicer-extensionsindex/381 "2017-05-25T00:33:11Z")

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I make my own s4ext file (write from scratch, copy from somewhere and modify it, etc) I use the s4ext file that was generated as part of the extension build process, and re-generate it that way if I need to update s4e…

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## [ExtensionWizard hangs](https://discourse.slicer.org/t/extensionwizard-hangs/372)

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**Author:** [@tdiprima](https://discourse.slicer.org/u/tdiprima)\
**Replies:** 2\
**Last updated:** [May 24, 2017, 2:31pm UTC](https://discourse.slicer.org/t/extensionwizard-hangs/372 "2017-05-24T14:31:13Z")

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Operating system: Windows 10 and Ubuntu 16 Slicer version: 4 (Nightly build -- for the past few weeks or so) Expected behavior: ExtensionWizard displays the extensions you can install Actual behavior: ExtensionWizard han…

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## [Slicer crash on fresh build](https://discourse.slicer.org/t/slicer-crash-on-fresh-build/351)

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**Author:** [@gregsharp.geo](https://discourse.slicer.org/u/gregsharp.geo)\
**Replies:** 7\
**Last updated:** [May 23, 2017, 2:47pm UTC](https://discourse.slicer.org/t/slicer-crash-on-fresh-build/351 "2017-05-23T14:47:41Z")

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Hi, I am trying to get Slicer to build and run on my home computer. It is debian testing with gcc 6 (unfortunately gcc 5 no longer offered). Clean directory, disable SimpleITK, disable BRAINS, ignore inevitible BRAINSCo…

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## [Trouble getting the real spacing of a DICOM serie using vtkImageData](https://discourse.slicer.org/t/trouble-getting-the-real-spacing-of-a-dicom-serie-using-vtkimagedata/361)

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**Author:** [@sandra](https://discourse.slicer.org/u/sandra)\
**Replies:** 2\
**Last updated:** [May 23, 2017, 11:33am UTC](https://discourse.slicer.org/t/trouble-getting-the-real-spacing-of-a-dicom-serie-using-vtkimagedata/361 "2017-05-23T11:33:21Z")

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Operating system: Mac Slicer version: 4.6.2 Hi everyone ! I'm currently working on my loadable module and I would need to get the real spacing of a DICOM serie using vtkImageData. I explain: the user loads a DICOM …

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## [Building Slicer on El Capitan](https://discourse.slicer.org/t/building-slicer-on-el-capitan/345)

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**Author:** [@xliu](https://discourse.slicer.org/u/xliu)\
**Replies:** 6\
**Last updated:** [May 19, 2017, 11:12pm UTC](https://discourse.slicer.org/t/building-slicer-on-el-capitan/345 "2017-05-19T23:12:10Z")

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Hi all, I am trying to build Slicer on my Mac. Qt4 installer does not work on El Capitan. I have tried homebrew, but it only installs Qt5 now. I also tried compile Qt4 with the homebrew patch, still failed. Is there an…

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## [Visualization of 3 Channel image in a scalar volume](https://discourse.slicer.org/t/visualization-of-3-channel-image-in-a-scalar-volume/335)

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**Author:** [@samira](https://discourse.slicer.org/u/samira)\
**Replies:** 2\
**Last updated:** [May 18, 2017, 10:17pm UTC](https://discourse.slicer.org/t/visualization-of-3-channel-image-in-a-scalar-volume/335 "2017-05-18T22:17:57Z")

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Hi All, I am currently writing a loadable module to generate a colormap and overlay it on top of a BMode image and I want to show the final image in the Slice view window. However, my final vtkImage has three channel…

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## [Swiss Skull Stripper: troubles invoking from python console](https://discourse.slicer.org/t/swiss-skull-stripper-troubles-invoking-from-python-console/305)

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**Author:** [@drAl](https://discourse.slicer.org/u/drAl)\
**Replies:** 10\
**Last updated:** [May 17, 2017, 10:09pm UTC](https://discourse.slicer.org/t/swiss-skull-stripper-troubles-invoking-from-python-console/305 "2017-05-17T22:09:54Z")

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Hi everyone! I'm trying to run the Swiss Skull Stripper from script and I'm getting this error every time: "Swiss Skull Stripper standard error: Exception caught ! itk::ImageFileReaderException (0000001D6C5BD0…

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## [It's 2017-05-16... Nightly Build is still 2017-05-09?](https://discourse.slicer.org/t/its-2017-05-16-nightly-build-is-still-2017-05-09/323)

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**Author:** [@tdiprima](https://discourse.slicer.org/u/tdiprima)\
**Replies:** 6\
**Last updated:** [May 17, 2017, 4:07am UTC](https://discourse.slicer.org/t/its-2017-05-16-nightly-build-is-still-2017-05-09/323 "2017-05-17T04:07:31Z")

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Hi! @fedorov I’m tagging you in this one since you and I had a conversation about it a couple of days ago. It looks like the nightly build is not pulling from what’s currently in Github. I’m checking CDash for clues… …

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