Created
June 18, 2023 18:33
Random Seed Usage Example
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function cyrb128(str) { | |
let h1 = 1779033703, h2 = 3144134277, | |
h3 = 1013904242, h4 = 2773480762; | |
for (let i = 0, k; i < str.length; i++) { | |
k = str.charCodeAt(i); | |
h1 = h2 ^ Math.imul(h1 ^ k, 597399067); | |
h2 = h3 ^ Math.imul(h2 ^ k, 2869860233); | |
h3 = h4 ^ Math.imul(h3 ^ k, 951274213); | |
h4 = h1 ^ Math.imul(h4 ^ k, 2716044179); | |
} | |
h1 = Math.imul(h3 ^ (h1 >>> 18), 597399067); | |
h2 = Math.imul(h4 ^ (h2 >>> 22), 2869860233); | |
h3 = Math.imul(h1 ^ (h3 >>> 17), 951274213); | |
h4 = Math.imul(h2 ^ (h4 >>> 19), 2716044179); | |
return [(h1^h2^h3^h4)>>>0, (h2^h1)>>>0, (h3^h1)>>>0, (h4^h1)>>>0]; | |
} | |
function mulberry32(a) { | |
return function() { | |
var t = a += 0x6D2B79F5; | |
t = Math.imul(t ^ t >>> 15, t | 1); | |
t ^= t + Math.imul(t ^ t >>> 7, t | 61); | |
return ((t ^ t >>> 14) >>> 0) / 4294967296; | |
} | |
} | |
function randomSeed(seed) { | |
let hash = cyrb128(seed); | |
let r = mulberry32(hash[0]); | |
return r(); | |
} | |
//randomSeed(string); | |
//Thanks: https://stackoverflow.com/a/47593316 |
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