From: Bart Braem <bart.braem@...>
Date: 2009-01-27T19:37:55+09:00
Subject: Re: Separate random number generators?

On Jan 25, 7:34 pm, Eric K Idema <e...@vying.org> wrote:
> Are you aware of the random gem?  I think it's exactly what you're looking for:
>
>  http://random.rubyforge.org/rdoc/index.html
>
> I use it in my game library to provide repeatable random numbers (with the
> requirement that the library backs a server, so I need to have one rng per
> game).
>
> If you need a pure ruby solution, I made a limited port of the random gem
> as well.  It lacks some of the api, but draws the same numbers for a given
> seed:
>
>  http://github.com/eki/vying/blob/912db0052151d40185309b62ceee83733b34...
>
> It's part of my game library, but it's only one file so you can just extract
> the rng if you want to use it.
>
> Eric
>
> --
> e...@vying.org
>
> On 19:38 Thu 22 Jan     , Bart Braem wrote:
>
> > For simulation work, I want to use multiple, independent random number
> > generators. Does anyone know up to date implementations?
>
> > I found randomr but that is inactive sinds 2001 and clearly marked
> > alpha (http://rubyvm.sourceforge.net/subprojects/randomr/)
> > I also found some projects from MoonWolf from 2004 but his site
> > (www.moonwolf.com, see e.g.http://raa.ruby-lang.org/project/random-mt19937/)
> > is offline. Which makes it hard to get to the code.
> > There is a generator that uses certain sites, but that is not really
> > an option.
> > I am now going to look at the isaac gem, but its version number 0.0.2
> > does not make me feel very happy.
>
> > Did anyone find better implemenations of PRNGs?
>
>

That random gem looks perfect, it works fine and fast.

Thanks for the suggestion!