POV-Ray : Newsgroups : povray.general : Requesting ideas/opinions for RNG seeding syntax : Re: Requesting ideas/opinions for RNG seeding syntax Server Time
30 Jul 2024 18:24:01 EDT (-0400)
  Re: Requesting ideas/opinions for RNG seeding syntax  
From: Alain
Date: 25 May 2009 16:30:25
Message: <4a1affe1$1@news.povray.org>
Phoenex nous illumina en ce 2009-05-23 08:45 -->
> 
> What about this algorithm
> 
> Xn+1 = SXn - INT(SXn)
> 
> See
> 
> http://www.number.com.pt/index.html
> 
> 
> Phoenix
> 
> 
The test speed is totaly bogus!
You compare 2 algorythms speed with the followng:
They were not performed under the same OS
They were not compiled under the same compiler, let alone the same parameters.
and, worst of all, on different processors, one of witch is "Unknown"!

So, those results are totaly meaningless.

Also, the range of numbers generated should include zero.

Next, the quality values.
Totaly non random/chosen values CAN come very close to most of those values, and 
exactly at those in many cases. It's possible to have 
non-random/non-pseudorandom streams that will match the results shown.


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