On Mon, 30 May 2005 08:50:43 +0200, Melchior wrote in message 
<[EMAIL PROTECTED]>:

> * Jon Berndt -- Monday 30 May 2005 00:26:
> > > Melchior FRANZ wrote:
> > > > When you fly over a beacon, the ground cache has to eat all
> > > > these triangles, which makes the FDM stutter or even hang. 
> 
> > Is the "ground cache" for the benefit of the FDM? 
> 
> The FDMs are currently the only users of the groundcache, and yes,
> they benefit from it. A lot. Per-wheel/contact-point ground awareness
> hadn't been done before Mathias implemented the ground cache. And
> probably it would have been a big performance problem to constantly do
> intersection test with the whole tile. Still, I didn't mean to blame
> the problems on the FDMs. I just called it "FDM stuttering" because
> this is what the user sees (and because the ground-cache code is in
> the FDM/ directory :-) But the FDM only stuttered, because it wasn't
> called in time, because of unfortunate groundcache/beacon interaction.
> And that wasn't really a bug, either.  Neither in the beacon, nor in
> the ground cache. Just a detail that had to be tuned for better
> performance.   :-)

..so we need it on the ground, and "immediately before impact".  ;o)

..if we disable it at altitude, how much time do we need to load it
"immediately before impact" ?

-- 
..med vennlig hilsen = with Kind Regards from Arnt... ;o)
...with a number of polar bear hunters in his ancestry...
  Scenarios always come in sets of three: 
  best case, worst case, and just in case.



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