<!-- MHonArc v2.4.4 -->
<!--X-Subject: [MUD-Dev] PRNGs: Pseudo Random Number Generators -->
<!--X-From-R13: X Q Znjerapr <pynjNhaqre.rate.ftv.pbz> -->
<!--X-Date: Thu, 9 Jul 1998 11:34:40 -0700 -->
<!--X-Message-Id: 199807091834.LAA08494#under,engr.sgi.com -->
<!--X-Content-Type: text/plain -->
<!--X-Head-End-->
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
<html>
<head>
<title>MUD-Dev message, [MUD-Dev] PRNGs: Pseudo Random Number Generators</title>
<!-- meta name="robots" content="noindex,nofollow" -->
<link rev="made" href="mailto:claw#under,engr.sgi.com">
</head>
<body background="/backgrounds/paperback.gif" bgcolor="#ffffff"
text="#000000" link="#0000FF" alink="#FF0000" vlink="#006000">
<font size="+4" color="#804040">
<strong><em>MUD-Dev<br>mailing list archive</em></strong>
</font>
<br>
[ <a href="../">Other Periods</a>
| <a href="../../">Other mailing lists</a>
| <a href="/search.php3">Search</a>
]
<br clear=all><hr>
<!--X-Body-Begin-->
<!--X-User-Header-->
<!--X-User-Header-End-->
<!--X-TopPNI-->
Date:
[ <a href="msg00117.html">Previous</a>
| <a href="msg00119.html">Next</a>
]
Thread:
[ <a href="msg00507.html">Previous</a>
| <a href="msg00115.html">Next</a>
]
Index:
[ <A HREF="author.html#00118">Author</A>
| <A HREF="#00118">Date</A>
| <A HREF="thread.html#00118">Thread</A>
]
<!--X-TopPNI-End-->
<!--X-MsgBody-->
<!--X-Subject-Header-Begin-->
<H1>[MUD-Dev] PRNGs: Pseudo Random Number Generators</H1>
<HR>
<!--X-Subject-Header-End-->
<!--X-Head-of-Message-->
<UL>
<LI><em>To</em>: <A HREF="mailto:mud-dev#kanga,nu">mud-dev#kanga,nu</A></LI>
<LI><em>Subject</em>: [MUD-Dev] PRNGs: Pseudo Random Number Generators</LI>
<LI><em>From</em>: J C Lawrence <<A HREF="mailto:claw#under,engr.sgi.com">claw#under,engr.sgi.com</A>></LI>
<LI><em>Date</em>: Thu, 09 Jul 1998 11:34:24 -0700</LI>
<LI><em>Reply-To</em>: <A HREF="mailto:mud-dev#kanga,nu">mud-dev#kanga,nu</A></LI>
</UL>
<!--X-Head-of-Message-End-->
<!--X-Head-Body-Sep-Begin-->
<HR>
<!--X-Head-Body-Sep-End-->
<!--X-Body-of-Message-->
<PRE>
There has been minor discussion here of the choice of PRNG's for
servers, and the impact of their NON-random properties on the server
and game. Depending on the server design and PRNG call
characteristics this can be a really mucky area of analyse (for
instance I can and do have many threads calling the PRNG in parallel
and pseudo-random and non-deterministic order).
The Mersenne Twister may be a valuable, and computationally cheap
approach:
URL:<A HREF="http://www.math.keio.ac.jp/~matumoto/emt.html">http://www.math.keio.ac.jp/~matumoto/emt.html</A>
--<cut>--
What is Mersenne Twister?
Mersenne Twister(MT) is a pseudorandom number generator developped by
Makoto Matsumoto and Takuji Nishimura (alphabetical order) during
1996-1997. MT has the following merits:
-- It is designed with consideration on the flaws of various existing
generators.
-- The algorithm is coded into a C source downloadable below.
-- Far longer period and far higher order of equidistribution than any
other implemented generators. (It is proved that the period is
2^19937-1, and 623-dimensional equidistribution property is assured.)
-- Fast generation. (Although it depends on the system, it is reported
that MT is sometimes faster than the standard ANSI-C library in a
system with pipeline and cache memory.)
-- Efficient use of the memory. (The implemented C-code mt19937.c
consumes only 624 words of working area.)
--<cut>--
Originally noted on SlashDot
URL:<A HREF="http://www.slashdot.org/articles/9807090958246.shtml">http://www.slashdot.org/articles/9807090958246.shtml</A>.
--
J C Lawrence Internet: claw#null,net
(Contractor) Internet: coder#ibm,net
---------(*) Internet: claw#under,engr.sgi.com
...Honourary Member of Clan McFud -- Teamer's Avenging Monolith...
</PRE>
<!--X-Body-of-Message-End-->
<!--X-MsgBody-End-->
<!--X-Follow-Ups-->
<HR>
<!--X-Follow-Ups-End-->
<!--X-References-->
<!--X-References-End-->
<!--X-BotPNI-->
<UL>
<LI>Prev by Date:
<STRONG><A HREF="msg00117.html">[MUD-Dev] Re: In game bulletin boards vs. Web based.</A></STRONG>
</LI>
<LI>Next by Date:
<STRONG><A HREF="msg00119.html">[MUD-Dev] Re: Affordances and social method (Was: Re: Wi</A></STRONG>
</LI>
<LI>Prev by thread:
<STRONG><A HREF="msg00507.html">[MUD-Dev] Re: Affordances and social method (Was: Re: Wi</A></STRONG>
</LI>
<LI>Next by thread:
<STRONG><A HREF="msg00115.html">[MUD-Dev] Massive brainstorm rant about an imaginary class system. (resent)</A></STRONG>
</LI>
<LI>Index(es):
<UL>
<LI><A HREF="index.html#00118"><STRONG>Date</STRONG></A></LI>
<LI><A HREF="thread.html#00118"><STRONG>Thread</STRONG></A></LI>
</UL>
</LI>
</UL>
<!--X-BotPNI-End-->
<!--X-User-Footer-->
<!--X-User-Footer-End-->
<ul><li>Thread context:
<BLOCKQUOTE><UL>
<LI><STRONG>[MUD-Dev] Re: Affordances and social method (Was: Re: Wi</STRONG>, <EM>(continued)</EM>
<ul compact>
<ul compact>
<ul compact>
<ul compact>
<ul compact>
<LI><strong><A NAME="01049" HREF="msg01049.html">[MUD-Dev] Re: Affordances and social method (Was: Re: Wi</A></strong>,
J C Lawrence <a href="mailto:claw#under,engr.sgi.com">claw#under,engr.sgi.com</a>, Wed 16 Sep 1998, 20:03 GMT
</LI>
</ul>
</ul>
</ul>
</ul>
<LI><strong><A NAME="00192" HREF="msg00192.html">[MUD-Dev] Re: Affordances and social method (Was: Re: Wi</A></strong>,
Koster, Raph <a href="mailto:rkoster#origin,ea.com">rkoster#origin,ea.com</a>, Mon 13 Jul 1998, 18:22 GMT
<UL>
<LI><strong><A NAME="00200" HREF="msg00200.html">[MUD-Dev] Re: Affordances and social method (Was: Re: Wi</A></strong>,
Dr. Cat <a href="mailto:cat#bga,com">cat#bga,com</a>, Tue 14 Jul 1998, 07:13 GMT
<UL>
<LI><strong><A NAME="00507" HREF="msg00507.html">[MUD-Dev] Re: Affordances and social method (Was: Re: Wi</A></strong>,
J C Lawrence <a href="mailto:claw#under,engr.sgi.com">claw#under,engr.sgi.com</a>, Thu 06 Aug 1998, 02:08 GMT
</LI>
</UL>
</LI>
</UL>
</LI>
</ul>
</LI>
<LI><strong><A NAME="00118" HREF="msg00118.html">[MUD-Dev] PRNGs: Pseudo Random Number Generators</A></strong>,
J C Lawrence <a href="mailto:claw#under,engr.sgi.com">claw#under,engr.sgi.com</a>, Thu 09 Jul 1998, 18:34 GMT
<LI><strong><A NAME="00115" HREF="msg00115.html">[MUD-Dev] Massive brainstorm rant about an imaginary class system. (resent)</A></strong>,
Till Eulenspiegel <a href="mailto:choke#sirius,com">choke#sirius,com</a>, Thu 09 Jul 1998, 17:48 GMT
<UL>
<LI><strong><A NAME="00145" HREF="msg00145.html">[MUD-Dev] Re: Massive brainstorm rant about an imaginary classsystem. (resent)</A></strong>,
Ross Nicoll <a href="mailto:rnicoll#calmar-mud,com">rnicoll#calmar-mud,com</a>, Fri 10 Jul 1998, 09:43 GMT
</LI>
<LI><strong><A NAME="00166" HREF="msg00166.html">[MUD-Dev] Re: Massive brainstorm rant about an imaginary class system. (resent)</A></strong>,
Travis Casey <a href="mailto:efindel#polaris,net">efindel#polaris,net</a>, Sat 11 Jul 1998, 18:20 GMT
</LI>
</UL>
</LI>
<LI><strong><A NAME="00113" HREF="msg00113.html">[MUD-Dev] Re: Affordances and social method (Was: Re: Wire d Magazine...)</A></strong>,
cat <a href="mailto:cat#bga,com">cat#bga,com</a>, Thu 09 Jul 1998, 17:29 GMT
</LI>
</UL></BLOCKQUOTE>
</ul>
<hr>
<center>
[ <a href="../">Other Periods</a>
| <a href="../../">Other mailing lists</a>
| <a href="/search.php3">Search</a>
]
</center>
<hr>
</body>
</html>