Tiny-PRNG

Tiny-PRNG is a tiny (1kb), mathematically correct, Javascript pseudorandom number generator, using the Lehmer / Park-Miller algorithm.

Usage

// Generate a random seed
const seed = Math.floor(Math.random() * (10 ** 12)

// Initialize PRNG with seed.  The seed can be any integer.
const generator = new PRNG(seed)

// Get the next pseudorandom int between 1 and 2147483646
let valueInt = generator.next()

// Get the next pseudorandom float between 0 and 1
let valueFloat = generator.nextFloat()

// Get the next pseudorandom number between 1000 and 9999
let valueBounded = generator.nextBoundedInt(1000, 9999)

NPM / Browserify / Webpack

Install

npm install tiny-prng

Import

const PRNG = require('tiny-prng')

or

import PRNG from 'tiny-prng'

Browser Script Tag

Import

<script src="https://cdn.patricktriest.com/vendor/prng/prng.min.js"></script>

Distribution Test

To verify that the PRNG generates a valid random(flat) distribution of possible values, the test directory contains a simple webpage + webworker that will generate batches of 1,000,000 pseudorandom, and continuously plot the distribution. To view this visualization, run http-server . and open http://localhost/test/.

You can also view this distribution test at https://cdn.patricktriest.com/vendor/prng/test/index.html