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script.js
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script.js
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// global consts
const cluePauseTime = 333;
const nextClueWaitTime = 1000;
// global vars
var pattern = [1, 3, 6, 2, 2, 5, 4, 4];
var progress = 0;
var gamePlaying = false;
var tonePlaying = false;
var volume = 0.5;
var guessCounter = 0;
var clueHoldTime = 1000; // how long to hold each clue's light/sound
var guessTime = 7000;
var guessInterval;
var timerTimeout;
function patternGenerator() {
for (let i = 0; i < 8; i++) {
pattern[i] = Math.floor(Math.random() * 6 + 1);
}
console.log(pattern);
}
function startGame() {
// initialize game vars
patternGenerator();
guessTime = 7000;
clueHoldTime = 1000;
drawTimer();
progress = 0;
gamePlaying = true;
// hide the Start button, show the Stop button
document.getElementById("startBtn").classList.add("hidden");
document.getElementById("endBtn").classList.remove("hidden");
playClueSequence();
}
function stopGame() {
clearInterval(guessInterval);
clearTimeout(timerTimeout);
gamePlaying = false;
document.getElementById("startBtn").classList.remove("hidden");
document.getElementById("endBtn").classList.add("hidden");
}
function lightButton(btn){
document.getElementById("button"+btn).classList.add("lit");
}
function clearButton(btn){
document.getElementById("button"+btn).classList.remove("lit");
}
function playSingleClue(btn) {
if (gamePlaying) {
lightButton(btn);
playTone(btn, clueHoldTime);
timerTimeout = setTimeout(clearButton, clueHoldTime, btn);
}
}
function playClueSequence() {
guessCounter = 0;
context.resume();
let delay = nextClueWaitTime;
for (let i = 0; i <= progress; i++) {
console.log("play single clue: " + pattern[i] + " in " + delay + "ms");
setTimeout(playSingleClue, delay, pattern[i]); // set a timeout to play that clue
delay += clueHoldTime;
delay += cluePauseTime;
}
clueHoldTime -= 100;
setTimeout("guessInterval = setInterval(guessTimer, 280)", delay);
}
function guessTimer() {
if (guessTime >= 280 && gamePlaying) {
guessTime -= 280;
} else if (!gamePlaying) {
return;
} else {
loseGame();
guessTime = 7000;
}
drawTimer();
console.log("guessTime: " + guessTime);
}
function drawTimer() {
let lightning = String.fromCodePoint(0x26A1);
document.getElementById("lightningTimer").innerText = lightning.repeat(guessTime / 280);
}
function guess(btn) {
console.log("user guessed " + btn);
if (!gamePlaying) {
return;
}
if (guessTime != 0) {
if (btn != pattern[guessCounter]) {
loseGame();
clearInterval(guessInterval);
} else if (guessCounter != progress) {
guessCounter ++;
} else if (progress < pattern.length - 1) {
progress++;
clearInterval(guessInterval);
clearTimeout(timerTimeout);
guessTime = 7000;
playClueSequence();
} else {
winGame();
clearInterval(guessInterval);
clearTimeout(timerTimeout);
}
} else {
loseGame();
clearInterval(guessInterval);
}
drawTimer();
}
function loseGame() {
stopGame();
alert("Game over. You lost!");
}
function winGame() {
stopGame();
alert("Good job, you won!");
}
function changeVolume() {
volume = document.getElementById("volumeRange").value;
}
// Sound Synthesis Functions
const freqMap = {
1: 200,
2: 261.6,
3: 329.6,
4: 392,
5: 466.2,
6: 528
}
function playTone(btn,len){
o.frequency.value = freqMap[btn]
g.gain.setTargetAtTime(volume,context.currentTime + 0.05,0.025)
context.resume()
tonePlaying = true
setTimeout(function(){
stopTone()
},len)
}
function startTone(btn){
if(!tonePlaying){
context.resume()
o.frequency.value = freqMap[btn]
g.gain.setTargetAtTime(volume,context.currentTime + 0.05,0.025)
context.resume()
tonePlaying = true
}
}
function stopTone(){
g.gain.setTargetAtTime(0,context.currentTime + 0.05,0.025)
tonePlaying = false
}
// Page Initialization
// Init Sound Synthesizer
var AudioContext = window.AudioContext || window.webkitAudioContext
var context = new AudioContext()
var o = context.createOscillator()
var g = context.createGain()
g.connect(context.destination)
g.gain.setValueAtTime(0,context.currentTime)
o.connect(g)
o.start(0)