// https://en.wikipedia.org/wiki/Linear_congruential_generator#Parameters_in_common_use | |
const mul = 0x19660D; | |
const inc = 0x3C6EF35F; | |
const eps = 1 / 0x100000000; | |
export default function lcg(seed = Math.random()) { | |
let state = (0 <= seed && seed < 1 ? seed / eps : Math.abs(seed)) | 0; | |
return () => (state = mul * state + inc | 0, eps * (state >>> 0)); | |
} | |