FlightGear Newsletter January 2013
This is a template for future newsletters, please feel free to edit/improve!
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We would like to emphasize that the monthly newsletter can not live without the contributions of FlightGear users and developers. Everyone with a wiki account (free to register) can edit the newsletter and every contribution is welcome. So if you know about any FlightGear related news or projects such as for example updated scenery or aircraft, please do feel invited to add such news to the newsletter. Core developers are encouraged to add news about their latest work to the newsletter's development section and the changelog of the upcoming release.
Development news
With just two more weeks to go till the release of FlightGear 2.10, you are encouraged to test the release candidates. These are basically complete releases, meant for testing by a large group of people. Bugs found (and reported!) during these tests have a fair chance getting fixed. Do note that the earlier bugs are reported, the more time we'll have to fix them.
You can download the latest release candidate from our website. Please install it in a special directory, away from your current FlightGear.
Bugs should be reported at our bug tracker, while questions or comments about the release candidate are welcome at our special subforum].
State Machines
James added initial support for state-machines to the XML autopilot code. This expands on the existing stateful flip-flop components, to allow arbitrarily complex collections of states and transitions between them. Each transition is controlled by a usual XML condition, and state and transitions can run arbitrary commands when activated. This system allows high-level control of complex auto-flight modes, without requiring a mixture of Nasal and XML. For example the armed / engaged / disarm states of many auto-flight subsystems (e.g., auto-brakes and auto-spoilers) can be expressed in a way that models the functional description.
Of course the state-machine concept has uses beyond auto-flight systems, for example it could be used to drive GUI dialog logic, but that's left as an exercise for the reader!
Random Buildings
Project Rembrandt
Canvas System
High Level Architecture
FlightGear on Android
Canvas-based CDU development
James has done a survey of the existing CDU setups, and produced a new version which combines the best parts of most of them - it uses the Canvas for rendering, but has a simple Nasal API for defining new pages and data fields, and for specifying how editing and buttons interact. (The later inspired by earlier work by Claus Christiansen) The code will be published in Git soon, and should be easily adaptable for any Honeywell-CDU equipped aircraft, providing you can compute suitable data values! For Boeing family aircraft the set of pages is quite similar, so the hope is to share some pages between at least the 737NG, 747-400 and any others where the developers wish.
In particular there is separation of the CDU core setup from the page layouts, and those are separated from the field data. This makes development easier (pages and data models can be reloaded easily), but also increases the changes that some aspects can be shared between families of aircraft.
The screenshots above shows a few pages from the 737NG - of the total pages, about 2/3rd now exist in some form, but with many placeholder values until the matching FMS code is developed. Note the font rendering is not quite correct - Yves has generated a better font with proper characters, but there wasn't yet time to include it. But the system already supports both the tradition CRT 'green' appearance and the more modern LCD appearance.
If you're unsure how much a given aircraft's CDU pages overlap with the 737NG, James is happy to help, assuming you have a suitable reference (manual) for your target aircraft. Even the Airbus MCDUs seem to share some concepts with Boeings, for once!
Procedural Terrain Texturing
For users with powerful graphics cards, a much improved version of Procedural Texturing of the Flightgear terrain (which is as of now implemented under the Atmospheric light scattering framework) is currently being developed. This generates highly detailed visuals of the terrain seen from close-up (the smallest structures generated are of 1 cm scale), including a gentle bump-mapping, grain overlay and optional sparse-dot noise generated rocks or grass patches.
The texturing procedure is easily configurable via materials.xml and combined with regional texturing allows for a much improved experience for low-level flights or helicopter trips away from airfields.
Note that this feature will not be available for the 2.10 release, as it requires still some testing.
Terragear
The master branch of terragear has recently seen more enhancements and cleanup. Most of the functionality has been put into a single terragear library for reuse in all tools. Furthermore, all essential parts of the toolchain now support multithreading. The multiprocess support for genapts has been removed in favour of threading as well.
Work continues on the elevation tools. GDALchop has been re-activated and should become the prior tool to chop up elevation source files into buckets. As it relies on the well-established codebase of GDAL, it takes away the task of opening and reading the different kinds of elevation files from the terragear developers. Supported formats can be seen here: http://www.gdal.org/formats_list.html
Usability Improvements
Mailing list digest
(by far the easiest option to populate the newsletter with contents is copying/pasting stuff from the forum and the mailing list or the git logs)
Forum digest
Git digest
Getting involved as a programmer
Please see Howto:Start core development
Release ChangeLog
This section lists changes committed this month that will be available in the next release, these will be copied to the release changelog shortly before a release (for each month), so that we hopefully get a comprehensive list of new features.
Interview with a contributor (NAME)
In each edition we have an interview with a contributor. Suggestions for possible questions are available on interview questions, you are invited to come up with new questions and interview ideas obviously! Anyone is free to write an interview (with him-/herself or others) for next month's newsletter! If you'd like to help interview a contributor or get interviewed, please do consider adding yourself to the list of interview volunteers! To keep this going and less awkward, we are currently trying to come up with the convention that former interviewees become next month's interviewers.
- How long have you been involved in FlightGear?
- What are your major interests in FlightGear?
- What project are you working on right now?
- What do you plan on doing in the future?
- Are you happy with the way the FlightGear project is going?
- What do you enjoy most about developing for FlightGear?
- Are there any "hidden features" you have worked on in FlightGear that new users may miss?
- What advice can you give to new developers who want to get started on their first aircraft/new feature/Nasal script?
More questions are being collected here: Interview questions.
Stay tuned for next month's interview, featuring FlightGear contributor XXXXXXXX
Snapshot releases
Every now and then, easy-to-install development snapshots are created (usually, twice montlhy). These snapshos depict a recent state of the development version of FlightGear. By using them users can test out features that will be included in the upcoming release. Testers are encouraged to file bugs at the issue tracker.
The snapshot can be download via the links at the bottom of this page: http://www.flightgear.org/download/. Updates and feedback can be found at the forum.
Translators required
The FlightGear Wiki still needs help for translating it into various languages. If you are interested in making the FlightGear Wiki multi-language then start at Help:Translate. | |
Das FlightGear Wiki benötigt immer noch Hilfe bei der Übersetzung in verschiedene Sprachen. Wenn Du Interesse daran hast, das FlightGear Wiki Mehrsprachig zu machen, dann fang doch mit Help:Übersetzen an. | |
De FlightGear Wiki kan nog steed hulp gebruiken bij het vertalen van artikelen. Als je interesse hebt om de wiki meertalig te maken, raden we je aan om een kijkje te nemen bij Help:Vertalen. | |
La FlightGear wiki todavía necesita ayuda para traducirla a varios lenguajes. Si estás interesado en hacer la FlightGear wiki multilingüe, entonces comienza en Help:Traducir. |
Nasal for newbies
New software tools and projects
FlightGear addons and mods
In the hangar
All the way back in May 2011, we addopted a new status-rating system for aircraft. So far, only a few have actually been rated, as can be seen in the list 'hockenberry' set up at Google Docs. If you're an aircraft developer and your aircraft is/are not on the list, please consider rating their status. All you'll need to know/do is described at Formalizing Aircraft Status. If you'd just like to get started contributing to FlightGear, this would also seem like an excellent way to get started.
New aircraft
Updated aircraft
Liveries
Scenery corner
Airports
Regional texturing
More regional texturing definitions are arriving on GIT! Hawaii has just received an update to make full use of procedural texturing techniques - see Fly Hawaii! for some additional info. Indonesia has arrived on GIT, and the Middle East region is currently being worked on - look forward to some nice variety in scenery in the future.
(Other regions having received regional texturing definitions so far include Europe, South American rain forest belt, Iceland and the Caribbean.)
Aircraft of the month
Airport of the month
Screenshot of the month
Suggested flights
Aircraft reviews
Wiki updates
New articles
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New aircraft articles
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Most popular newsletters
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Community news
FlightGear on YouTube
New tutorials and screencasts
Forum news
To ease the use of FlightGear forum on mobile (small screen) devices, a special mobile theme has been created. Basic layout works, but there are still parts left waiting for optimisation. You should see the mobile theme automatically when you visit the forum on a device with a screen size smaller than 500 pixels. You can turn back to the normal layout by clicking a link at the bottom of the page.
Multiplayer
Virtual airlines
Flightgear has a brand new airline, Galaxy Virtual Airlines has now commenced operations created by George9 & Sbyx. They are currently desprate for pilots & help so go and visit their website, (See VA page)
FlightGear events
Useful links
And finally ...
Contributing
One of the regular thoughts expressed on the FlightGear forums is "I'd like to contribute but I don't know how to program, and I don't have the time". Unfortunately, there is a common mis-conception that contributing requires programming and lots of free time. In fact, there are a huge range of ways to contribute to the project without needing to write code or spending days working on something.
For ideas on starting to contribute to FlightGear, you may want to check out: Volunteer.
To learn more about how the project works, please see this short essay written by Thorsten, for a more detailed article see How the FlightGear project works.
Call for volunteers
- The Flightgear On Android team is looking for testers
- The Target4Today team is looking for volunteers to help improving FlightGear's combat support
- The FGFSPM (FlightGear Package Manager) is looking for a new maintainer.