voided-data/dist/math/random.js

Proper DS for TS

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.randomSfc32 = exports.sfc32 = void 0;
const hash_1 = require("./hash");
/**
 * @param a: seed part 1
 * @param b: seed part 1
 * @param c: seed part 1
 * @param d: seed part 1
 */
function sfc32(a, b, c, d) {
    a >>>= 0;
    b >>>= 0;
    c >>>= 0;
    d >>>= 0;
    let t = (a + b) | 0;
    return function () {
        t = (a + b) | 0;
        a = b ^ (b >>> 9);
        b = (c + (c << 3)) | 0;
        c = (c << 21) | (c >>> 11);
        d = (d + 1) | 0;
        t = (t + d) | 0;
        c = (c + t) | 0;
        return (t >>> 0) / 4294967296;
    };
}
exports.sfc32 = sfc32;
function randomSfc32(seed) {
    const [a, b, c, d] = (0, hash_1.cyrb128)(seed);
    return sfc32(a, b, c, d);
}
exports.randomSfc32 = randomSfc32;