The FlightGear Initialization Sequence

Work in progress This article or section will be worked on in the upcoming hours or days. See history for the latest developments.

Intro

FlightGear Initialization takes places in $FG_SRC/Main/fg_init.cxx this is where subsystems are added. This is also the right place to make subsystems optional.

in general, the process of removing a subsystem involved editing fg_init.cxx and navigating to createSubsystems() and removing unneeded stuff there, but that is an inherently fragile process - as per the "initialiing Nasal early"-journey documented on the wiki, because FG was never designed with this requirement in mind, and still is not being maintained/developed accordingly (despite HLA and similar efforts). — Hooray (Aug 31st, 2015). Re: Steps for Removing subsystems in flightgear source code. (powered by Instant-Cquotes)

Idle States

There are a number of so called "idle states" which are changed during initialization:

/sim/startup/current-idle-state changed:3
/sim/startup/current-idle-state changed:4
/sim/startup/current-idle-state changed:5
/sim/startup/current-idle-state changed:7
/sim/startup/current-idle-state changed:8
/sim/startup/current-idle-state changed:9
/sim/startup/current-idle-state changed:10
/sim/startup/current-idle-state changed:900
/sim/startup/current-idle-state changed:1000