Re: [Flightgear-devel] Volcanoes - an update

[Mihajlo T. <tom...@gm...>]

It looks great. I have a question though. Does it interact with ALS
?  Does terrain get dark beneath ash cloud and Sun obscured? There can also
be substantial rayleigh scattering during an eruption if particles are high
enough and have the right size. Can we achieve the  same effect by just
increasing air pollution.
Regards,
Mihajlo

23.09.2017. 19.06, "Thorsten Renk" <tho...@sc...> је
написао/ла:

>
> I think I've now made a set of design decisions which hopefully will make
> everyone happy:
>
> * volcanoes are managed neither by the AI system nor the scenemodels but a
> new Nasal volcano manager
>
> * the manager is an opt-in system that needs to be activated to run
>
> * what it does is maintain a list of how distant to the plane implemented
> volcanoes are. Based on that list, it switches any particular volcano model
> on if the volcano is closer than 150 km and in visible range (whatever
> happens first). The advantage is that models (and particle systems) loaded
> that way are visible from afar, which is somewhat important for lava
> fountains a few hundred meters high or ash plumes.
>
> * any implemented volcano has the option to utilize its own Nasal code
> that is loaded 'on demand' along with the 3d model (for instance, to time
> and regulate eruption plumes) - most of the volcano code will therefore be
> neither run nor loaded during a normal FG session
>
> * what it will do in the future is talk to the weather system to render
> the ash clouds downwind - I'll probably have to extend the precipitation
> code to simulate ash fall - in any case the weather system will provide the
> property in case anyone is interested in simulating engine damage
>
> Hope that's all acceptable to everyone.
>
> Right now I have worked my way up to Stromboli-type eruptions which are
> somewhat more violent than the Hawaiian ones.
>
> https://forum.flightgear.org/viewtopic.php?f=19&t=32982
>
> Looking at some footage of the Pinatubo eruption, super-Plinian events
> might be a toughie - we're talking an ash column > 40 km high for instance,
> so this would be felt and seen from hundreds of kilometers away.
>
> Oh - I guess if ever we want to provide a generic environment sound
> option, that might be a good use case. I'm guessing if you're close enough,
> you can hear a volcano quite well even over the engine noise...
>
> * Thorsten
>
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