Documentation/4.1/Developers/StartHere

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3D Slicer is a free open source extensible software application for medical image computing and visualization. Mainly written in C++ and based on the NA-MIC kit, 3D Slicer relies on a variety of libraries: VTK, ITK, CTK, CMake, Qt and Python.

To ensure the stability of the application, relying on a robust software process, the source code is compiled and tested on a daily basis on a variety of platform configurations. The testing results are summarized and reported using a web-based centralized CDash dashboard. Developers of 3D Slicer can also report issues on the open mailing list or using the web-based bug tracking system.

3D Slicer consists of both a lean application core and modules offering specific functionality. The core implements the user interface, provides support for data input/output (IO) and visualization and also exposes developer interfaces that support extension of the application with new modules.

Multiple types of modules are supported: CLI, Loadable module, Scripted module and Editor effect. While the developer has to choose between one of these types to implement its module, the end user won't notice the difference as they all share the same look & feel. The choice for a given type of module is usually based on the type of inputs/parameters for a given module.

These modules can be either built-in or installed on demand via the extensions manager.

New community member checklist

1.    Sign-up on the developer mailing list
2.    Register on the issue tracker
3.    Sign-up on github and setup Git
4.    Fork Slicer repository: https://github.com/Slicer/Slicer
5.    Read the Slicer Style Guidelines so that we all understand each other :)

Develop a module or an extension

1. Build Slicer application
2. Learn about the different type of modules
3. Create

   CLI module or

   Loadable module or

   Scripted module or

   Editor effect

4. Read documentation guidelines
5. Build modules outside of Slicer source tree.
6. Hack, hack, hack :)
7. Bundle module(s) into a Slicer extension
8. Build, test, package and distribute extensions

Contribute a patch

The following instructions describes the recommended workflow to contribute patch to Slicer code base.

It is also assumed you followed the New community member checklist and have a clone of https://github.com/Slicer/Slicer/.

• 1. Create an issue in the tracker. For example, see issue #1906

• 2. Make sure your fork has a git remote. Replace jcfr with your git login.

git remote add jcfr git@github.com:jcfr/Slicer.git

• 3. Create a topic named <issuer_number>-a-descriptive-topic-name. For example:

git checkout -b 1906-uninstall-extensions-on-restart

• 4. Add a note to the issue with a link pointing to your topic. For example, see note 1906#c4578

• 5. Send an email on the slicer-developers list pointing to the reported bug. Title of the email should start with [BUG <IssueNumber>] Title of the bug - <category>