> On Monday 30 May 2005 13:21, Jon Stockill wrote:
> > I'm not certain the area that the ground cache covers, but I
> > suspect it has applications beyond just contact points. ISTR
> > Lee was wanting to know ground elevation a distance ahead of
> > the aircraft for the terrain following mode of the TSR2s
> > autopilot - could this be used?
> >
> > Jon
>
> Hello Jon,
>
> well remembered:)  I did give some thought to look-ahead
> algorithms and I think it would be possible to come up with a
> rolling max/min type algorithm that would only need one
> look-ahead sample per frame to get a good straight-line TF
> target agl.
>
> Gets much more complicated if turning, of course:)
>
> LeeE

If you are using look-ahead algorithms for terrain following (i.e. modeling a 
LANTIRN pod
or something) this should only be enabled when it is actually used - probably 
not many
models need that. Certainly, the C-172 does not.

Jon


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