Re: Reducing airports polygon count

Dale E. Edmons wrote:

> Would it be fairly easy to reduce the polygon count of airports?  
> Reducing the polygons in the terrain was fairly easy but the airport 
> count is still too high  for my application (converting to SPX-200 on 
> two of our full flight simulators).  I'm still working out a few bugs 
> in my conversion so I haven't looked too closely yet, but it should be 
> somewhere in TerraGear/src/Airports/GenAirports.  Large airports 
> currently cause rhe visual system to abort due to timeout caused by 
> overload as soon as the airport tries to come into view.


If it's a load time issue, you may also need to be concerned about the 
number of runway lights.

A really quick/crude hack would be to simply eliminate all the 
taxiways.  That would drop your polygon count down substantially.  
Runways are divided up into smaller chunks so that we can properly apply 
the various texture pieces which together form the whole runway.  
Without changing the texture scheme. there's not much you can do about 
reducing the number of poly's used for the runways.

It would be interesting to hear how your IG natively models 
airports/runways.  How do they build/draw the runway numbers and other 
markings.  Are they part of the texture, or are they overlayed as 
separate polygons?

You could always rewrite the airport generator to use a different 
scheme. :-)

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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