27 lines
597 B
JavaScript
27 lines
597 B
JavaScript
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/**
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* Xorshift32 is a very simple but elegang PRNG with a period of `2^32-1`.
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*/
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export default class Xorshift32 {
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/**
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* @param {number} seed The starting point for the random number generation. If you use the same seed, the generator will return the same sequence of random numbers.
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*/
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constructor (seed) {
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this.seed = seed
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this._state = seed
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}
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/**
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* Generate a random signed integer.
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*
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* @return {Number} A 32 bit signed integer.
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*/
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next () {
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let x = this._state
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x ^= x << 13
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x ^= x >> 17
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x ^= x << 5
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this._state = x
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return x
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}
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}
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