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Date: Thu, 30 Dec 2010 12:53:51 +0100
From: Georg Bauhaus <rm.dash-bauhaus@futureapps.de>
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Subject: Re: Random number generation
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Date: 2010-12-30T12:53:51+01:00
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On 30.12.10 12:34, Niklas Holsti wrote:

> If every call of Roll is returning the same results, perhaps the calls happen
> so rapidly that whatever discrete "time" source Reset uses is the same on each
> call, thus setting G to the same state on each call.

If I place a delay before each call of Roll, I get more
different values, confirming this time/speed dependence
of resetting the generator.

> Ordinarily I would suggest to call Reset just once, and then let the state of
> the generator evolve without Resets over all calls of Roll, but this cannot be
> done here because G is a local variable in Roll, and it must be so since the
> generic actual parameter depends on the Size parameter of Roll.

OTOH, the Size parameter is fixed at 6, so subtype Die_Size and
the generator could be placed outside Roll.  Anyway, another
nest will give suitable life times to the objects involved.