[ODE] Framework

[Colin Reed]

> the demos are meant as tutorials and simple tests as well, so in the
> interests of keeping them simple i think the constant step sizes should
> be preserved (just keep a constant frame rate by waiting for the next
> refresh). however, if you are interested in doing something much
> more elaborate (i.e. a real demo of ODEs capabilities, with decent
> graphics, not a simple tutorial) then by all means...

Sorry, I wasn't trying to imply that my method does not use constant
time steps, it does, however one step of the simulator does not mean one
step of the display, and visa-versa. I was trying to imply that there
needs to be a slight de-coupling of the time step and display step in
order to provide framerate independence.

Colin