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let seed = 1 | |
function seededRandom(max = 1, min = 0) { | |
seed = (seed * 9301 + 49297) % 233280; | |
let rnd = seed / 233280.0; | |
return min + rnd * (max - min); | |
} | |
for (let i = 0; i < 9; i++) { | |
console.log(seededRandom()) | |
} |
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const MT = { | |
queue: [], | |
seed: 0, | |
index: 0, | |
init(seed=0) { | |
const queue = this.queue | |
this.seed = seed | |
queue[0] = seed | |
for (let i = 1; i < 623; i++) { | |
queue[i] = 0x6c078965 * (queue[i - 1] ^ queue[i - 1] >> 30) + i | |
} | |
}, | |
twist() { | |
const queue = this.queue | |
this.index = 0 | |
for (let item, i = 0; i < queue.length; i++) { | |
item = queue[i] | |
item = (item & 0x80000000) + (queue[(i + 1) % 624] & 0x7fffffff) | |
queue[i] = item ^ queue[(i + 397) % 624] >> 1 | |
item % 2 ? queue[i] ^= 0x9908b0df : null | |
} | |
}, | |
random() { | |
let v = this.queue[this.index] | |
++this.index > this.queue.length - 1 && this.twist() | |
v ^= v >> 11 | |
v ^= v << 7 & 0x9d2c5680 | |
v ^= v << 15 & 0xefc60000 | |
v ^= v >> 18 | |
return v | |
} | |
} |
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