[ODE] Reseting World Params

[David Whittaker]

Ya know, I hadn't really thought about that.  I could even make the last
random number a world parameter so you could simulate two different worlds
simultaneously with the same results (Maybe you're doing comparisons or
something on a split screen and want to reduce external variables...). 
Good idea.

David

>
> You can always copy the rand() code David and use your own variables for
> it in ODE - then it can be reseeded independently.
> --
> gl
>
> ----- Original Message -----
> From: "David Whittaker" <david@csworkbench.com>
> To: <ode@q12.org>
> Sent: Monday, April 14, 2003 10:44 PM
> Subject: Re: [ODE] Reseting World Params
>
>
>> It's the standard C random number generator... rand and srand. (I know
>> it's not great, but all I need is a different order each step, not
>> necessarily a statistically perfect distribution).  You should be able
>> to reseed it before the first step and get the same results, but Rob
>> is doing some evolutionary programming, so he'd have to be sure that
>> no rand() calls were made during the simulation (or that the same
>> number happened each time) for outside stuff.  Since randomizing the
>> joint order shouldn't make that big of a difference for smaller
>> systems, I just suggested turning it off.
>>
>> David
>>
>> >
>> >
>> > David Whittaker wrote:
>> >>
>> >> Would you happen to be using the iterative solver?  If so, comment
>> out #define RANDOMIZE_JOINT_ORDER
>> >> (I think that's what I called it... it's close anyway.)
>> >
>> > What random number generator are you using?  Can you just reseed it?
>> >
>> > - Martin
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