gnrng

gnrng

A minimal seeded random number generator that generates numbers between -1 and 1. Adapted from the more full-featured seedrandom (and using xorshift), though chances are this is all you need.

Pronounced "grrrngg".

Installation

npm i gnrgn

or

yarn add gnrng

Usage

Call rng with a string as the generator's seed and receive a new function in return. Call this function to produce a random number between -1 and 1. Calling rng again with the same seed will produce the same random numbers.

import { rng } from "gnrng"

const getRandom1 = rng("abc")
const a = getRandom1() // Random number between -1 and 1
const b = getRandom1() // Random number between -1 and 1

const getRandom2 = rng("abc") // same seed
getRandom2() === a // true
getRandom2() === b // true

const getRandom3 = rng("xyz") // different seed
getRandom3() === a // false
getRandom3() === b // false