perlin noise and a random that as closely represents java's math.random

a few extra functions and vars but

by Darby Rathbone

HTML

<div id="cont">stuff:</div>
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JavaScript

/*
  I've wrapped Makoto Matsumoto and Takuji Nishimura's code in a namespace
  so it's better encapsulated. Now you can have multiple random number generators
  and they won't stomp all over eachother's state.
  
  If you want to use this as a substitute for Math.random(), use the random()
  method like so:
  
  var m = new MersenneTwister();
  var randomNumber = m.random();
  
  You can also call the other genrand_{foo}() methods on the instance.
 
  If you want to use a specific seed in order to get a repeatable random
  sequence, pass an integer into the constructor:
 
  var m = new MersenneTwister(123);
 
  and that will always produce the same random sequence.
 
  Sean McCullough ([email protected])
*/
 
/* 
   A C-program for MT19937, with initialization improved 2002/1/26.
   Coded by Takuji Nishimura and Makoto Matsumoto.
 
   Before using, initialize the state by using init_genrand(seed)  
   or init_by_array(init_key, key_length).
 
   Copyright (C) 1997 - 2002, Makoto Matsumoto and Takuji Nishimura,
   All rights reserved.                          
 
   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions
   are met:
 
     1. Redistributions of source code must retain the above copyright
        notice, this list of conditions and the following disclaimer.
 
     2. Redistributions in binary form must reproduce the above copyright
        notice, this list of conditions and the following disclaimer in the
        documentation and/or other materials provided with the distribution.
 
     3. The names of its contributors may not be used to endorse or promote 
        products derived from this software without specific prior written 
        permission.
 
   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  ...