I think that the best setup would use a broken line rather than a simple linear
ramp, to show actual transition outside of atmospheric flight. Would something
like that affect performance much?
Alessandro
> From: lauri.pelto...@gmail.com
> To: flightgear-devel@lists.sourceforge.net
> Date: Thu, 19 May 2011 21:38:38 +0300
> Subject: Re: [Flightgear-devel] Testing OSG-trunk / bug issue #268
>
> Hi all!
>
> At last I had time to look at the black sky problem which resulted every
> time visibility was < 1000 meters (or feet?). Anyways, I found the
> problem.
>
> Indeed I changed the clear color to be black to make space look better.
> But what I didn't know was that the whole sky (dome and stars etc) is
> optimised away if visibility is less than that 1000 units.
>
> So the solution is either change the clear color to what it was, or make
> it ramp linearly to black or something with altitude.
>
> Or change simgear/scene/sky.cxx around line 117 (repaint method), there
> is a
> if ( effective_visibility > 1000.0 ) {
> ...
> } else {
> // turn off sky
> disable();
> }
>
> so taking that condition away would solve the problem.
>
> What would be the best solution, what do you think?
>
> Zan
>
>
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