scott wrote:
>>> OK so I quickly modified my existing RK4 code to do integration steps 
>>> on 1728*972 particles in 2D with 4x 1/r attractors.  So it takes 
>>> about 2.5 seconds per integration step, does this compare with your 
>>> results?
>>
>> It's roughly comparable, certainly.
>>
>> (What hardware are you running it on?)
> 
> That was using 1 core of an Intel E8500 @ 3.16 GHz.

OK. My hardware is considerably less powerful.

Is that RK4 with a single step, or with adaptive step subdivision?

> Of course someone has already done particle system simulation on the GPU 
> before:
> 
> http://2ld.de/gdc2004/
> 
> Running option 2 of that demo on my GPU gives 15fps for a million 
> particles, so for 1728x972 I make that about 9fps.  If you restrict it 
> to 2D rather than 3D it should go a little faster.

Heh, nice... Coming to a gaming station near you, eh?

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