Aspect ratio


Hi

I have started using visad a couple of weeks ago, it looks real nice ..

I have ((x,y)--> z) function where x,y are in meters and z in % and
when I make a 3D display of it I get a cube type display no mater what
range is x,y (if x=1000m y=5000m I should have rectangle xy plane but I
get
a square).
is there a way to set the aspect ratio, I looked at setAspect in
ProjecionControl3D/2D
but the method is not there yet defined in API. How can I preserve the
aspect ratio...?

Thanks

Walid