[ODE] ODE - Constant speed in different qualities boxes

[Megan Fox]

If I was doing it properly, I would be running my entire game loop at a
fixed rate (so I would update EVERYTHING in the loop, once per loop, then
render at the end), but I'm not :)

I do run the collision system once per loop, but I don't communicate the
position of the geoms to the "real" entities in my systems until the looping
has stopped.  I think I might adjust this in the "real" engine such that I
run the entire system at a fixed rate - it would make it easier to retrofit
the engine to allow replays.

-Megan Fox

> I have a quastion about this method:
> Do you repeat collision detection for multiple updates ?
>
> ie:
>
> --- BEGIN CODE ---
> collideWorld();
> while (timeAccumulator > ODE_STEP_SIZE)
> {
>    StepFast(ODE_STEP_SIZE);
>    timeAccumulator -= ODE_STEP_SIZE;
> }
> updateWorldPositions();
> renderWorld();
> --- END CODE ---
>
> versus
>
> --- BEGIN CODE ---
> while (timeAccumulator > ODE_STEP_SIZE)
> {
>    collideWorld();
>    StepFast(ODE_STEP_SIZE);
>    updateWorldPositions();
>
>    timeAccumulator -= ODE_STEP_SIZE;
> }
> renderWorld();
> --- END CODE ---
>
> mucki
>
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