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    <p>Thanks for all the replies, and also, for anyone who might happen upon this asking a similar question, I found a solution that isn't exactly what I asked for, but fits the bill for my purposes.</p> <p>It is a <a href="http://en.wikipedia.org/wiki/Perlin_noise" rel="nofollow noreferrer">perlin noise</a> class that can be found <a href="http://www.flipcode.com/archives/Perlin_Noise_Class.shtml" rel="nofollow noreferrer">here</a>. I'm not sure how computationally complex this is relative to a conventional random number generator, which is a concern, since one of the planned platforms is Android. Also, perlin noise isn't the same thing as pseudorandomness, but from what I can tell, a high octave and/or frequency value should provide suitable randomness for non-cryptographic purposes, where the statistical level of true randomness isn't as important as the mere appearance of randomness.</p> <p>This solution allows seeding, and also allows sampling a random set from any point, in other words, random access randomness.</p> <p>here's an example set of regular c++ randomness (rand%200) on the left column for comparison, and perlin noise (with the equivalent of %200) on the right:</p> <pre><code>91 , 100 48 , 97 5 , 90 93 , 76 197 , 100 97 , 114 132 , 46 190 , 67 118 , 103 78 , 96 143 , 110 187 , 108 139 , 79 69 , 58 156 , 81 123 , 128 84 , 98 15 , 105 178 , 117 10 , 82 13 , 110 182 , 56 10 , 96 144 , 64 133 , 105 </code></pre> <p>both were seeded to 0</p> <p>the parameters for the perlin noise were </p> <pre><code>octaves = 8 amplitude = 100 frequency = 9999 width/height = 10000,100 </code></pre> <p>the sequential sampling order for the perlin noise was simply</p> <pre><code>for (int i=0;i&lt;24;i++) floor(Get(i,i)+100); //amplitude 100 generates noise between -100 and 100, //so adding 100 generates between 0 and 200 </code></pre>
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    1. POis there a such thing as a randomly accessible pseudo-random number generator? (preferably open-source)
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    1. COThanks for sharing
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    2. COI'm just looking for this,greatly appreciated
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