Re: [Flightgear-devel] dual head linux FG

[Curtis L. O. <cur...@fl...>]

Justin Smithies wrote:

>Right ive got FG to use 2 screens , i just have one more problem which 
>probably FG cant do yet.
>When i bank left or right the both screens bank but do not join up at the 
>meeting point if you know what i mean.
>One screens scenery is higher than the other.
>
>This is my command line to run FG 
>
>fgfs --enable-game-mode --geometry=2048x768 --aircraft=737 --airport-id=EGPD 
>--runway=16 --enable-real-weather-fetch --bpp=32 --enable-ai-models 
>--enable-horizon-effect --enable-auto-coordination       
>
>Any ideas ?
>  
>

Right now FlightGear isn't able to render 2 different views into 
portions of a single window.  That's what you need to do, and it implies 
walking the scene graph and doing the cull&draw twice, once for each 
view.  That has some performance implications.

What you could do right now is launch 2 copies of flightgear and have 
each draw to it's own area.  Again that has even more severe performance 
implications than having a single app draw to two different windows.  
For each copy of FlightGear you would have complete control over the 
field of view and view offset angle.

I've done this with one PC per view.  I have run more than one copy of 
FG on a single machine, but that was years ago and I drew both windows 
on the same monitor.  That performed very badly, but I was doing it 
either in software rendering or on pretty weak hardware by todays 
standards.  With a modern PC and graphics card, you might be able to get 
away with running 2 copies.

Let us know how it works out. :-)

Curt.

-- 
Curtis Olson        http://www.flightgear.org/~curt
HumanFIRST Program  http://www.humanfirst.umn.edu/
FlightGear Project  http://www.flightgear.org
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