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The BK117-B2

Screenshots, videos, sound recording etc. taken in/with FlightGear.

The BK117-B2

Postby StuartC » Sun Mar 05, 2017 1:14 pm

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Re: The BK117-B2

Postby Thorsten » Sun Mar 05, 2017 3:59 pm

Wait - you're shooting non-Rembrandt videos now? :mrgreen:

In this case you can look forward to a decent lightcone/atmosphere interaction effect:

Image
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Re: The BK117-B2

Postby StuartC » Sun Mar 05, 2017 4:48 pm

I didn't shoot the video, but if I did, your light cones don't show on Multiplayer, so I would have selected Rembrandt.
If your going to make fancy lights, it needs to work over multiplayer.
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Re: The BK117-B2

Postby Thorsten » Sun Mar 05, 2017 4:55 pm

Sorry, that's just nonsense. Effects show over MP if

* the receiving player has selected the matching rendering quality
* the controlling property is marked for transmission

That's largely outside the hands of the effect framework itself (you can have your Rembrandt light on all day - if the receiving player doesn't run Rembrandt it won't show...)
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Re: The BK117-B2

Postby StuartC » Sun Mar 05, 2017 5:27 pm

When did that change arrive ?
Last time it was tested the ALS coneless lights did not work over multiplayer at all due to them relying on the pilot viewpoint.
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Re: The BK117-B2

Postby geed » Sun Mar 05, 2017 5:33 pm

Thorsten I shot and edited the video :)

That new effect looks absolutely juicy! OK, can you tell us how to enable it? From what version on will it be usable? (Basically, if there is some sort of back compatibility, it will be good to tell our users)
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Re: The BK117-B2

Postby Thorsten » Sun Mar 05, 2017 6:21 pm

When did that change arrive ?


Which one?

The light-atmosphere interaction effect isn't pushed yet, it's in development - probably in next release (I did say 'look forward to'...).

ALS landing lights visible on the runway from outside views are with FG since 2016.3 or so - same with the technology of lights external to the aircraft specified via relative geometry (used e.g. to illuminate the Shuttle from the ground floodlights during night landings or SRB separation at night). The latter can also be used for scenery to player or MP to MP illumination, and Richard is toying with the idea of using the emesary MP bridge for the job.
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Re: The BK117-B2

Postby geed » Sun Mar 05, 2017 8:35 pm

Good one! I am gladly looking forward to the light-atmosphere interaction then.

Seriously, this functionality together with the external lighting rendering will make a perfect searchlight for helicopters, I think. Will have a look at that.
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Re: The BK117-B2

Postby pommesschranke » Sun Mar 05, 2017 8:56 pm

Thorsten wrote in Sun Mar 05, 2017 6:21 pm: of lights external to the aircraft specified via relative geometry (used e.g. to illuminate the Shuttle from the ground floodlights during night landings


I'd like to try that.
Where can I find such ground floodlights ?
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Re: The BK117-B2

Postby Thorsten » Mon Mar 06, 2017 7:56 am

In the Shuttle light manager function.

(N.B.: This almost certainly doesn't work like you expect it to, because in real time 3d rendering light is always a property of the illuminated surface and never of a light source (a surface doesn't show a Rembrandt light if its effect doesn't include code to do it - try to illuminate rain drops in Rembrandt...)

So any lighting always requires some form communication between light source and effect assigned to the surface. In Rembrandt, lots of performance is burned to set this up fairly generally via additional passes and buffers. The ALS technique requires you to set this up specifically - so there has to be an information exchange between light and effect - which is what the light manager does for the Shuttle, and which is what emesary can do more generally between scenery object Nasal snippets and an aircraft.

As far as user experience is concerned, it looks all fairly similar and in fact dedicated information exchange is much faster than Rembrandt's passes and buffers - you're talking a handful of variables at most once per frame - but setting it up is rather different and more tedious).
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