Re: Fans vs faces

Ivo wrote:

>Hi all,
>
>I was wondering about the following. It appears to me that 99% of the 
>0.9.7/8 FG scenery is solely made out of triangle fans. Only a few tiles 
>use triangle faces, mainly near the poles and airports. This seems a little 
>odd to me. For example, I assumed all roads and rivers would have been 
>triangle strips, but instead those consist of multiple fans too.
>
>Can anybody explain me why this is the case? Any particular reason or design 
>issue I'm overlooking?
>  
>

Fans seemed like a good idea at the time, and I haven't gotten back to 
writing a tri stripper.  I know that there is existing code, but what I 
have found and tried is *buggy* so we need to write something 
ourselves.  Even if it isn't quite as optimized ... our stripper code 
needs to be rock solid and always produce correct results.

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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