XorShift128Plus

A seedable random number generator.

Installation

npm install --save xorshift128plus

Usage

var XorShift128Plus = require('xorshift128plus')
var rng = XorShift128Plus.fromRandom()

rng.next() // random number

API

new XorShift128Plus(buffer[, byteOffset])

Creates a new RNG using the supplied ArrayBuffer and optional offset. Using the RNG will modify the supplied buffer. The initial seed should be stored in the buffer.

XorShift128Plus.fromRandom()

Creates a new RNG with a psuedo-random seed chosen for you.

XorShift128Plus.fromHex(seed)

Creates a new RNG with the seed specified as a string of 32 hexadecimal characters. e.g. '5d289450c888f99b5e5c1fd13509e39e'.

XorShift128Plus.fromUint32(seed)

Creates a new RNG with the seed specified as a unsigned 32bit integer. Note that this seeding is suboptimal since it will only contain 32 bits of entropy instead of 128 bits.

rng.next() -> Number

Returns the next psuedo-random number between 0 (inclusivly) and 1 (exclusivly).