'use strict';
/* Deepgrain Foundry: simulation core (src/sim/). No DOM anywhere in src/sim/: plain data and
   functions, so the headless tests can run it and the layout can be ported to Rust later.
   This file: the random number generators and the phase ids every material has. */

// ---------- RNG ----------
let RS = 0x2545F491 | 0;
function rnd() { RS ^= RS << 13; RS ^= RS >>> 17; RS ^= RS << 5; return (RS >>> 0) * 2.3283064365386963e-10; }
function mulberry32(a) {
  return function () {
    a |= 0; a = a + 0x6D2B79F5 | 0;
    let t = Math.imul(a ^ a >>> 15, 1 | a);
    t = t + Math.imul(t ^ t >>> 7, 61 | t) ^ t;
    return ((t ^ t >>> 14) >>> 0) / 4294967296;
  };
}
function hash2(x, y, s) {
  let h = Math.imul(x, 374761393) + Math.imul(y, 668265263) + Math.imul(s, 1442695041);
  h = Math.imul(h ^ (h >>> 13), 1274126177);
  return ((h ^ (h >>> 16)) >>> 0);
}

// ---------- Phases ----------
const PH_EMPTY = 0, PH_SOLID = 1, PH_POWDER = 2, PH_LIQUID = 3, PH_GAS = 4, PH_ITEM = 5; // items (bars) never sit in the grid