Talk:Nasal Initialization

From FlightGear wiki
Revision as of 13:35, 8 January 2020 by Hooray (Talk | contribs)

Jump to: navigation, search

FGNasalSys init

Referring to your addition at [1], the FlightGear portion of the patch you can find at Initializing Nasal early is trivial, but it can be used to expose FlightGear's initialization to the property tree by using a so called Property Object. That is exactly how the init sequence of fgfs has been documented on the article's talk page: Talk:Initializing_Nasal_early#Subsystem_Creation. To look at some of the original work, see the commits at [2]. In particular, you may want to take a look at the mechanism used to automatically dump the init sequence to a hash for inspection purposes [3]. In other words, if you'd like to understand parts of the current init sequence (nasal or not), this is a really straightforward approach - i.e. expose things via properties sg::PropertyObject<std::string> and then use a Nasal space listener to track all updates - at that point, you can automatically populate your wiki article, and don't need to manually do any reverse engineering, all you need to do is register a callback to track all loading of Nasal sources in sequential order, you can then use the CPP macros __FILE__, __FUNCTION__ and __LINE__ respectively to add useful information/pointers. That way, you end up with a self-documenting init sequence, which should also come in handy for stuff that bugman has been working on (regression testing and Python support). --Hooray (talk) 13:34, 8 January 2020 (EST)