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Welcome to the developer portal

Please visit our forum if you cannot find what you're looking for.

Get involved!

If you would like to help with FlightGear's development, it's a good idea to subscribe yourself to the FlightGear development mailing list. Use the list or the FlightGear issue tracker to get in touch with fellow FlightGear core developers.

Visit Category:Core development projects to see a list of currently ongoing projects! See Category:Developer Plans to see a list of developer plans for the upcoming release. See request for comments for a list of long-standing issues and challenges affecting FlightGear's evolution and overall development progress (admittedly a little outdated meanwhile).

Help needed: SimGear 2.11+ now has experimental support for a libsvn replacement, people building from source are encouraged to help with testing and debugging this new feature:

Cquote1.png First, I need some help; for people to rebuild simgear with -DSG_SVN_CLIENT=1, and mv / erase their TerraSync dir. Then simply run FGFS as normal, as if you were starting on a new machine / account with no previous use of TerraSync.[1]
— James Turner
Cquote1.png So, as I've previously asked before, I really need people running from 'next' to try with -DSG_SVN_CLIENT=1 when configuring SimGear, move their existing TerraSync dir out the way, and test, test, test. I'm sure the new code isn't 100% trouble free (in particular I think there is still the occasional time when it gets stuck not doing any more downloads until FG is restarted), but I really don't want to move forwards with the code until I have a bit more assurance it's not going to make everyone's setup crash 80% of the time, which is what some people have reported. Note this applies even if you 'don't use' terrasync since the SVN sync engine is going to be used for other pieces of data as soon as it's stable. (I will be adding a new preference to globally control whether FG works in online/offline mode, of course)[2]
— James Turner
  1. James Turner (Tue, 11 Jun 2013 08:58:20 -0700). TerraSync libSVN replacement testing.
  2. James Turner (Fri, 20 Sep 2013 09:54:38 -0700). [Flightgear-devel] Built-in Svn client code crashing.

Coding Help Needed! (Updated 11/2013)


Wanted: interview candidates

Every month we try to include an interview with a contributor in the FlightGear Newsletter. Anyone contributing to FlightGear, in whatever way, is welcome to answer a few questions and write his/her own interview.

More info at FlightGear Newsletter: Interview.
Development repository status
Current release: 2020.3 (6 Nov 2020)
Next release: 2021.1 (58 days from now)
See release plan for details.

Getting started
How the FlightGear project works
The development process · Release plan
Building FlightGear · Git · Build server
Property tree · File formats · Tools of the Trade

Long term goals · Google Summer of Code
Project infrastructure enhancements
Improving glider realism / helicopter realism
Setting up a multiplayer server · Expo checklist

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Making an aircraft · Flight dynamics model
3D aircraft models · Liveries · Resources
Creating instruments · System dependent instruments
Designing an autopilot

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Animate models · Illuminate objects
Gear scissors · Tracking animation
Clickable panels · Knob / slider animation

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List of Core Developers · Developer Plans · Projects
Getting started · Programming resources
Adding fgcommands · Creating subsystems
Built-in Profiler · Howto:Extend Nasal
Howto:Use Property Tree Objects · Code cleanup
FlightGear-Points of Interest · Request for comments
OpenSceneGraph · Rendering system improvements

FlightGear Scripting with Nasal
Frequently asked questions · Writing simple scripts
Nasal for C++ programmers · Variables and their types
Conditionals · Loops · Operators · In-sim Console

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Procedural Texturing
Placing objects · Airport signs
Converting from X-Plane/MSFS
Making an airport · Generating terrain
Interactive traffic