import type { Vec2 } from "./types";

export function seededRandom(seed: number): () => number {
  let state = seed;
  return () => {
    state = (state * 1103515245 + 12345) & 0x7fffffff;
    return state / 0x7fffffff;
  };
}

export function manhattan(a: Vec2, b: Vec2): number {
  return Math.abs(a.x - b.x) + Math.abs(a.y - b.y);
}

export function lerp(a: number, b: number, t: number): number {
  return a + (b - a) * t;
}