luizbills

async function requestPersistentStorageIfNeeded() {
  if (!navigator.storage || !navigator.storage.persist) {
    return;
  }

  const isAlreadyPersisted = await navigator.storage.persisted();
  if (isAlreadyPersisted) {
    return;
  }

luizbills

// based on https://www.4rknova.com/blog/2026/03/01/mulberry32-rng
function hashStringToUint32(input) {
  let h = 2166136261 >>> 0; // FNV-1a 32-bit offset basis
  for (let i = 0; i < input.length; i += 1) {
    h ^= input.charCodeAt(i); // xor in next character
    h = Math.imul(h, 16777619); // multiply by FNV prime
  }
  return h >>> 0;
}

luizbills

Simple Timer

Litecanvas plugin to handle simple timers.

Usage

litecanvas()

function init() {

luizbills

/**
 * @param {number} frequency
 * @param {number} [duration] in seconds
 * @param {number} [wavetype] 0 (sine), 1 (triangle), 2 (saw), 3 (tan), 4 (noise) or 5 (square)
 * @param {number} [volume]
 */
function beep(frequency, duration = 0.1, wavetype = 1, volume = .5) {
    sfx([, 0, frequency, 0.01, duration, 0.01, wavetype], 0, volume)
}

luizbills

litecanvas()

framerate(1)
draw()

function draw() {
  cls(3)
  block = randi(10,100)
  for (let y = 0; y < H; y += block) {
    for (let x = 0; x < W; x += block) {

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litecanvas({})

function draw() {
  cls(0)

  textfont("monospace")
  textalign("center", "middle")
  
  const dots = ".".repeat(wrap(T*1.5,0,5)+1)
  text(W/2, H/2, "LOADING\n"+dots)

luizbills

//! Based on https://slicker.me/javascript/physics/physics_engine.htm

// Vector utilities
class Vec {
    constructor(x=0, y=0) {
        this.x = x;
        this.y = y;
    }
    add(v) {
        return new Vec(this.x + v.x,this.y + v.y);

luizbills

litecanvas({
  width: 8*8,
  autoscale: 3
})

const p = {
  x: 0,
  y: 0,
  dx: 0,
  dy: 0,

luizbills

litecanvas({})

let cards = [], sprites, opens = [], timer = 0

const 
  SIZE = 64,
  OFFSET = SIZE/4,
  CLOSED_CARD = paint(SIZE, SIZE, () => {
    cls(2)
  })

luizbills

litecanvas({})

function init() {
  framerate(1)
}

function draw() {
  cls(0)
  // linedash([10,5])
  // circ(W/2, H/2, 150, 2)