David Megginson writes:
> Alex Romosan writes:
> 
>  > i was flying the a4 trying to dodge buildings when i crashed into one
>  > of them. the problem is i was some distance away from it as you can
>  > see from the picture at http://caliban.lbl.gov/a4_crash.pnm (it's a
>  > 1600x1200 picture so it might be pretty large). so either the crash
>  > code is wrong, or the crash boxes around buildings are too big.
> 
> There are no crash boxes around buildings -- we're not doing collision
> detection at all.  If you crashed, you must have hit the ground
> (possibly at one of those nasty tile intersections people have been
> talking about).

The height above terrain routine traverses the scene graph so it
should return intersections with buildings or any other random/dynamic
object.  The aircraft moves in discrete steps though so with smaller
objects there is a chance you could skip it without detecting ground
above you.

Curt.
-- 
Curtis Olson   IVLab / HumanFIRST Program       FlightGear Project
Twin Cities    [EMAIL PROTECTED]                  [EMAIL PROTECTED]
Minnesota      http://www.menet.umn.edu/~curt   http://www.flightgear.org

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