10 lines
360 B
JavaScript
10 lines
360 B
JavaScript
// 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));
|
|
}
|