[ODE] ODE's speed

[Martin C. Martin]

RTFM

- Martin

Thomas Grimes wrote:
> 
> I was just wondering why, like for example, when you stack so many boxes (10
> for me) that any more after that the simulation will slow WAY down and every
> other box you stack it just goes slower. Also like in the crash example,
> there are a good number of boxes stacked for you to ram into with the car.
> That demo really goes slow from so many boxes stacked. And when you crash
> into the boxes, for a few seconds it's just extremely slow. Now I know my
> CPU isn't the fastest out there (600MHz) but it seems like something simple
> like this shouldn't go so slow. I just read some of the notes from the
> keynotes from id software at QuakeCon 2003 today and they mention their
> physics engine can stack at least 100 boxes for example and have the player
> shoot some of them off making all of the other boxes fall down realistically
> and with out bringing the engine down to a slideshow speed. And this is with
> all the other game stuff and graphics stuff going on at the same time! They
> mention that no other phsyics engine can do this without going at snail
> speed. That seems pretty cool. Anyway, I'd just like to know what is going
> on that makes the physics engine (ODE) go so slow when there are a number of
> boxes, or anything really, stacked. I'd like to optimize ODE using SSE and
> stuff but I just don't know when I can get around to it. :)
> 
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