Re: [Flightgear-devel] Fwd: in air starts and all preset

[Martin S. <Mar...@mg...>]

James Turner wrote:
> On 2 Nov 2010, at 14:14, Martin Spott wrote:

>> According to my understanding a safe assumption about "defaults" would
>> mean to have the state of a fresh startup scenario replayed. More
>> precisely this would mean to a) read 'static' aircraft configuration
>> (from '*-set.xml' files), b) furtheron read stuff which had been
>> written into '$HOME/.fgfs/', c) afterwards read the '$HOME/.fgfsrc'
>> file and d) finally the given command line flags. At least this is what
>> I'd expect as a user ....
>> 
>> To achieve such state upon "reset" you could think of a) storing every
>> parameter, which had been read from startup config ressources, into
>> reserved space in memory as "The Initial State" or b) re-read the same
>> set of config files and/or flags upon reset.
>> I guess that b) would be rather ressource-intensive, and since storing
>> a boiled down copy of the startup properties in memory might be rather
>> cheap these days, I suspect it would be the way to go.
> 
> Yeah, and indeed part of a) is already done - it's just a question of
> extending it to more properties / trees of properties.
> 
> I can't think of any likely ways this could break existing aircraft
> or scripts - can you?

I don't - but I'm probably not the best candidate for being questioned
about this flavour of details  ;-)
Even if it would, having a plausible, reasonably defined and thus
reproducible mechanism for the long term is probably worth a lot more
than an obviously imperfect hack just to meet the needs of a few
scripts (if there were the demand for such thing). The startup-scenario
is a well-defined state and therefore I can't imagine why its
re-instantiation could be "bad" (TM).

Cheers,
	Martin.
-- 
 Unix _IS_ user friendly - it's just selective about who its friends are !
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