Ken Rose wrote:
> Vu Ngoc San wrote:
>> Jon Harrop a écrit :
>>> Real-time 2D rigid body simulation with OpenGL visualization in under
>>> 400 lines of OCaml code:
>>>
>>>   http://www.ffconsultancy.com/ocaml/balls/
>>>
>>> Handles 100 balls with sub-centisecond accuracy on my machine.
>>>
>> very nice indeed. Note that balls can cross walls when resizing the
>> window :-)
> 
> Or in my case, by just falling through them.  I'm using a 2GHz AMD64x2,
> and getting about 2fps from it.  Anybody have any idea what might be
> going wrong?

You don't say anything about your OS or graphics H/W, but as you 
appear to be running 64-bit Linux, I will go out on a limb and say you 
probably have graphics driver problems... ;)

Generally speaking, these have historically lagged [significantly] 
behind Windows drivers performance-wise, as they don't get nearly as 
much attention from the graphics chip manufacturers.

Robert Roessler
roessler@rftp.com
http://www.rftp.com