Re: [Flightgear-devel] Volcanoes - an update

[<ch...@mu...>]

Am 24.09.2017 um 16:28 schrieb Thorsten Renk:
> 
>> I guess it'd have to be implemented aircraft-side, right? Could
>> this be done by the weather engine?
> 
> To some degree yes, but it would be a fairly invasive hack. Thanks to
> the general structure in terms of the property tree, subsystems can
> potentially reach much deeper into others than they necessarily
> should.
> 
> So I think a weather system should confine itself to report what the
> conditions of the atmosphere are and not force rendering settings
> aircraft-side. I'm afraid that if you want aircraft react to ash in
> the air, you'll have to code it yourself into the aircraft.
> 
> * Thorsten
> 

Hm, I think it might be generally easier (also easier to maintain) if
we had this "ash-plasma" added to ALS itself. That would avoid possibly
hundreds of implementations of the same thing. Sth like:

// no idea about good numbers, just a wild guess!
if (KIAS > 250 and AshDensity > 20%)
  { do_the_ash_plasma_boogie; }
if (KIAS > 2000)
  { do_the_entry_plasma_boogie; }

Obviously a Sopwith Camel won't reach sufficient speed to see this
phenomenon, any airliner will.

Only thing I don't know, and haven't looked it up yet, how the
implementation details are. If we have to define the spots, where this
happens (leading edges, nose-tip etc), then I agree, it should be done
aircraft-side. If it's done by some other method, like calculating the
spots on the fly, it should be generic.

I suppose I'm stating the obvious - at least that helps me clarifying
things...

Cheers,
chris


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