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46 | import Gen from './vendor/mersenne';
export class Mersenne {
private gen = new Gen();
constructor() {
this.gen.init_genrand(new Date().getTime() % 1000000000);
// Bind `this` so namespaced is working correctly
for (const name of Object.getOwnPropertyNames(Mersenne.prototype)) {
if (name === 'constructor' || typeof this[name] !== 'function') {
continue;
}
this[name] = this[name].bind(this);
}
}
rand(max?: number, min?: number) {
// TODO @Shinigami92 2022-01-11: This is buggy, cause if min is not passed but only max,
// then min will be undefined and this result in NaN for the whole function
if (max === undefined) {
min = 0;
max = 32768;
}
return Math.floor(this.gen.genrand_real2() * (max - min) + min);
}
seed(S: number) {
if (typeof S != 'number') {
throw new Error('seed(S) must take numeric argument; is ' + typeof S);
}
this.gen.init_genrand(S);
}
seed_array(A) {
if (typeof A != 'object') {
throw new Error(
'seed_array(A) must take array of numbers; is ' + typeof A
);
}
this.gen.init_by_array(A, A.length);
}
}
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