First of all, I'm not saying "let's switch to OpenRT now". I am saying that
if FlightGear's scenegraph ever requires a large restructure, it will be a
good time to look at the feasibility of using OpenRT.
On October 20, 2004 11:50 pm, Boris Koenig wrote:
> nope, it wasn't required - after all it is supposed to be
> "software-raytracing" and not hardware, but I *assume* without
> a corresponding hardware board your CPU would probably be abused
> as a GPU - almost exclusively ...
> > The reason I brought the OpenRT topic up again is that (as far as I
> > understand) it can run on most people's desktop.
> yes, but I somehow doubt that there would remain much idle CPU time -
> you'd probably at least need a dual-processor board - but again, I'm
> Probably, they wouldn't start developing prototype hardware boards:
>> Now, if it can render a 350 million polygons model using a CPU that is
>> than mine, then it should be able to handle FlightGear with ease.
> I am not so sure about that - in order to get representative data, one
> would need to have at least some simple tests available or maybe even a
> simple game that employs the software-based raytracing approach.
> On http://graphics.cs.uni-sb.de/RTGames/ there are various games
> mentioned, even screenshots are shown - and even very promising
> divx-videos - but there doesn't seem to be a simple demo for personal
> evaluation !?
> This might be the case because all these videos seem to have been
> created using clusters of a dozen or even more 1 GHZ machines ...
Even if FlightGear were to utilize OpenRT, I highly doubt it will ever have to
render more than several hundred thousands polygons at a time.
Just look at Oasen at
Some numbers to frighten children:
500.000 polygons heightfields
> 1000 objects, ~30.000 polygons each
level complexity: 15 Mio polygons
138 dynamical lightsources, all of them casting dynamic shadows from all
objects to all objects
The numbers already give a hint that this "game" is made for stressing the
graphic library to the limit, not for you and I to play.
> Doesn't sound that feasible to me :-/
> But that page is also where you can find the quote I mentioned:
> "We are very much interested in evaluating new ways for computer
> games and therefore like to cooperate with the gaming industry.
> Thus if you are in such a position, please send us an email! "
> Maybe they've got a mailing list ? Possibly they would provide you with
> more details if you contact them...
> But I doubt that it is the ultimate solution - there are certainly
> drawbacks, and it's not necessarily suited for any purpose, either.
> Otherwise it would probably already be a lot more popular !?
Well, I guess the answer to that question will remain unknown until someone
decides to look more deeply into it.
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