Curtis L. Olson wrote:
 > I agree that random/periodic bugs are insidious and frustrating and
 > makes the software look like crap; therefore we should have a
 > 'culture' of agressive pursuit of these problems.  But, unfortunately
 > I can't replicate your particular problem here which makes it
 > difficult for me to do anything about it.

I've been playing around a bit and have a somewhat simpler test case
that I can reproduce consistently.  These coordinates place you
immediately (100m or so) in front of the tile boundary that Melchior
originally posted.  On my graphics card, it's visible as a tiny white
crack.

   fgfs --lon=-122.498813 --lat=37.586699 --heading=275

Just roll along for a little bit and you'll crash when you hit the
tile boundary.  I tried this with a few aircraft, and they all seem to
see the same bump.  Sticking a printf in YASim's update method (or
actually uncommenting one that someone else added, heh) I see the
terrain elevation leap by about 2 meters as you cross the tile
boundary.

Now, 2m doesn't sound like a lot to worry about, but clearly the
terrain rendering isn't showing anything near a 2 meter difference, so
the problem isn't with the scenery data itself.  If there's a bug in
the collision detection, it's possible that it has higher magnitudes
elsewhere.

I have to go back to work now, but maybe this will help someone else
track down the issue.

Andy

-- 
Andrew J. Ross                NextBus Information Systems
Senior Software Engineer      Emeryville, CA
[EMAIL PROTECTED]              http://www.nextbus.com
"Men go crazy in conflagrations.  They only get better one by one."
  - Sting (misquoted)


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