Flight Simulator Interface

by admin in Matlab on April 3, 2019

About the FlightGear Interface

The Aerospace Blockset™ product supports an interface to the third-party FlightGear flight simulator, open-source software available through a GNU General Public License (GPL). The FlightGear flight simulator interface included with the blockset is a unidirectional transmission link from the Simulink® interface to FlightGear using the FlightGear publishednet_fdm binary data exchange protocol. Data is transmitted via UDP network packets to a running instance of FlightGear. The blockset supports multiple standard binary distributions of FlightGear.

FlightGear is a separate software entity not created, owned, or maintained by MathWorks.

To report bugs or request enhancements to FlightGear itself, visit FlightGear website.

Supported FlightGear Versions

The Aerospace Blockset product supports these FlightGear versions:

  • v2.0
  • v2.4
  • v2.6
  • v2.8
  • v2.10
  • v2.12
  • v3.0
  • v3.2
  • v3.4
  • v2016.1
  • v2016.3
  • v2017.1
  • v2017.3

If you are using a FlightGear version older than 2.0, update your FlightGear installation to a supported version. When you open the model, the software returns a warning or error. Obtain updated FlightGear software from www.flightgear.org in the download area.

Obtain FlightGear

You can obtain FlightGear from the FlightGear website in the download area or by ordering CDs from FlightGear. The download area contains extensive documentation for installation and configuration. Because FlightGear is an open-source project, source downloads are also available for customizing and porting to custom environments.

Configure Your Computer for FlightGear

To use FlightGear, you must have a high-performance graphics card with stable drivers For more information, see the FlightGear CD distribution or the hardware requirements and documentation areas of the FlightGear website.

FlightGear performance and stability can be sensitive to computer video cards, driver versions, and driver settings. You need OpenGL® support with hardware acceleration activated. Without proper setup, performance can drop from about a 30 frames-per-second (fps) update rate to less than 1 fps. If your system allows you to update OpenGL settings, modify them to improve performance.

Graphics Recommendations for Windows

For Windows® systems, use the following graphics recommendations:

  • A graphics card with acceptable OpenGL performance (as outlined at the FlightGear website).
  • The latest tested and stable driver release for your video card. Test the driver thoroughly on a few computers before deploying to others.

For more information, see FlightGear Hardware Recommendations.

Setup on Linux, Macintosh, and Other Platforms

FlightGear distributions are available for Linux®, Macintosh, and other platforms from the FlightGear website, www.flightgear.org. Installation on these platforms, like Windows, requires careful configuration of graphics cards and drivers. Consult the documentation and hardware requirements sections at the FlightGear website.

FlightGear and Video Cards in Windows Systems

Your computer built-in video card, such as NVIDIA® cards, can conflict with FlightGear shaders. Consider one of these workarounds:

  • In the device manager, disable the NVIDIA driver, enable the Windows system video driver, and start FlightGear. After starting FlightGear, you can reenable the NVIDIA video card.NoteIf you do not reenable the NVIDIA card, the Windows driver can affect shading quality, or cause your system to lose support for multiple monitors.
  • Disable the FlightGear shaders by selecting the Generate Run Script block Disable FlightGear shader options check box.

Install and Start FlightGear

The extensive FlightGear documentation guides you through the installation in detail. Consult the following:

Keep the following points in mind:

  • Configure your computer graphics card before you install FlightGear. See the preceding section, Configure Your Computer for FlightGear.
  • Shut down all running applications (including the MATLAB interface) before installing FlightGear.
  • Install FlightGear in a folder path name composed of ASCII characters.
  • MathWorks tests indicate that the operational stability of FlightGear is especially sensitive during startup. It is best not to move, resize, mouse over, overlap, or cover up the FlightGear window until the initial simulation scene appears after the startup splash screen fades out.

Aerospace Blockset supports FlightGear on several platforms. This table lists the properties to consider before you start to use FlightGear.

FlightGear Property Folder Description Platforms Typical Location
FlightGearBaseDirectory FlightGear installation folder. Windows 64-bit C:\Program Files\FlightGear 
Linux Folder into which you installed FlightGear
Mac /Applications 
(folder to which you dragged the FlightGear icon)
GeometryModelName Model geometry folder Windows 64-bit C:\Program Files\FlightGear\data\Aircraft\HL20
Linux $FlightGearBaseDirectory/data/Aircraft/HL20
Mac $FlightGearBaseDirectory/FlightGear.app/Contents/Resources/data/Aircraft/HL20

Install Additional FlightGear Scenery

When you install the FlightGear software, the installation provides a basic level of scenery files. The FlightGear documentation guides you through installing scenery as part the general FlightGear installation.

If you need to install more FlightGear scenery files, see the instructions at http://www.flightgear.org. The instructions describe how to install the additional scenery in a default location. MathWorks® recommends that you follow those instructions.

If you must install additional scenery in a nonstandard location, try setting the FG_SCENERY environment variable in the script output from the Generate Run Script block. See the documentation at http://www.flightgear.org for a description of the FG_SCENERY variable.

If you do not download scenery, you can direct FlightGear to download it automatically during simulation by selecting the Generate Run Script block Install FlightGear scenery during simulation (requires Internet connection) check box.


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