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// https://gist.github.com/304522 | |
// Ported from Stefan Gustavson's java implementation | |
// http://staffwww.itn.liu.se/~stegu/simplexnoise/simplexnoise.pdf | |
// Read Stefan's excellent paper for details on how this code works. | |
// | |
// Sean McCullough banksean@gmail.com | |
/** | |
* You can pass in a random number generator object if you like. | |
* It is assumed to have a random() method. |