DOKK / manpages / debian 12 / flightgear / fgviewer.1.en
FGVIEWER(1) FlightGear man pages FGVIEWER(1)

fgviewer - An alternative FlightGear viewer application

fgviewer [--fg-root rootdir] [--fg-scenery scenerydir] [--config configfile] [--prop property value] [--renderer rend] [--hla] [--federation fed]

fgviewer is a viewer application that allows you to examine FlightGear scenery and objects without starting fgfs(1).

Set the FlightGear data root directory ($FG_ROOT) to rootdir. If this option is not set, fgviewer uses the path specified in the FG_ROOT environment variable or, absent that, the FlightGear data directory chosen at the time the program was compiled.
Set the FlightGear scenery directory ($FG_SCENERY) to scenerydir. If this option is not set, fgviewer uses the path specified in the FG_SCENERY environment variable or, absent that, the Scenery subdirectory inside $FG_ROOT.
Read configuration directives from configfile.
Set the property named property to value.
Use the renderer named rend to render the scenery. This option is currently not supported.
Enable HLA federation.
Enable a custom federation named fed.

fgviewer exits with EXIT_SUCCESS on success, with EXIT_FAILURE if the syntax of the command-line arguments is wrong or an error occurs.

If FG_ROOT is set and --fg-root is not set, it specifies the root data directory to use.
If FG_SCENERY is set and --fg-scenery is not set, it specifies the scenery directory to use.

$FG_ROOT/defaults.xml
Default preferences file loaded on startup.

fgfs(1)

2017-06-25 FlightGear