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From: Torsten D. <to...@t3...> - 2017-07-18 11:04:00
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Hi, we now have a simple API to add addons to FlightGear without the need to mess around with FGData/Nasal or FGHome/Nasal directories. FlightGear now accepts the command line switch --addon=/path/to/some/addon (note: command line switch is just that: a command line switch - not an option to be entered into the launcher). fgfs (through options.cxx) takes care of - creating a property under /addons/addon[n]/path=/path/to/some/addon - adding /path/to/some/addon/config.xml as a config file (same as --config=/path/to/some/addon/config.xml) - adding /path/to/some/addon to the list of allowed directories (same as --fg-aircraft=/path/to/some/addon) The addon may be installed anywhere on your hard disk and it needs at least two files: * config.xml - a standard PropertyList to be used to populate or modify the property tree. (Same as to be used in --config=foo.xml) * main.nas - the Nasal hook for the logic. This file needs a function called main() which will be called from the global addon initializer (FGData/addons.nas) It is pretty simple but does it's job nicely with our two addons we currently have in FGAddon (ATCChatter and SpokenATC). There is a /very/ simple Skeleton addon available to be used as a boilerplate here: https://sourceforge.net/p/flightgear/fgaddon/HEAD/tree/trunk/Addons/Skeleton/ As always: feedback is much appreciated. -- Torsten Dreyer |