Function createRng

examples/data-update-animation/main.ts:20–27

(seed: number)

 * Small deterministic RNG (LCG) for repeatable "random" transitions.
 */
const createRng = (seed: number): (() => number) => {
  let s = (seed >>> 0) || 1;
  return () => {
    // Numerical Recipes LCG constants
    s = (1664525 * s + 1013904223) >>> 0;
    return s / 0xffffffff;
  };
};

const clamp = (v: number, min: number, max: number): number => Math.max(min, Math.min(max, v));