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html5-boomshine.html
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html5-boomshine.html
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<!DOCTYPE html>
<html>
<head>
<title>HTML5 BOOMSHINE</title>
<meta charset="UTF-8">
<style>
canvas {
background: #8FFFF4;
position: absolute;
left: 80px;
top: 50px;
border: 3px solid #5EA8A1;
border-radius: 10px;
}
body {
background: #8FFFF4;
margin: 0;
}
h1{
-ms-transform:rotate(270deg);
-webkit-transform:rotate(270deg);
transform:rotate(270deg);
color:#FFF;
font-family:Lemon, cursive;
font-size:45px;
left:-220px;
margin:0;
padding:0;
position:absolute;
text-shadow:-3px 3px #5EA8A1;
top:230px;
}
</style>
<link href='http://fonts.googleapis.com/css?family=Lemon|Gochi+Hand' rel='stylesheet' type='text/css'>
</head>
<body>
<h1 id="title">HTML5 BOOMSHINE</h1>
<canvas id="canvas"></canvas>
<div style="position:absolute;left:80px; top: 470px;">
Catch <span id="needed">0</span> of <span id="total">0</span> balls! You got <strong id="clear">0</strong>.<br>
Level: <span id="level">1</span> Score <span id="score">0</span><br>
<span style="color:#8FFFF4">Click on the background for the fast mode!</span>
</div>
<script>
/**
* @license HTML5 experiment Boomshine
* http://www.xarg.org/project/html5-boomshine/
*
* Copyright (c) 2014, Robert Eisele (robert@xarg.org)
* Dual licensed under the MIT or GPL Version 2 licenses.
**/
(function(window) {
var canvas = document.getElementById('canvas');
var eClear = document.getElementById('clear');
var eNeed = document.getElementById('needed');
var eTotal = document.getElementById('total');
var eLevel = document.getElementById('level');
var eScore = document.getElementById('score');
var title = document.getElementById('title');
var ctx = canvas.getContext('2d');
var H = 400;
var W = 550;
var tau = Math.PI * 2;
var level = 1;
var score = 0;
var numClear = 0;
var numTotal;
var numNeed;
var lock;
var scaleTime = 1000;
var openTime = 2000;
var flashTime = 1000;
var radius = 7;
var speedScale = 1;
canvas.height = H;
canvas.width = W;
var rand = function() {
var r = (Math.random() - Math.random()) / 2;
return 0 <= r ? --r : ++r;
};
var balls = [];
var createBalls = function(n) {
balls = [{
t: 0,
r: 0,
x: -1,
y: 0,
xs: 0,
ys: 0,
cr: 0xcc,
cg: 0xcc,
cb: 0xcc
}];
for (var i = n; i--; ) {
balls.push({
t: 0,
r: radius,
x: radius + Math.random() * (W - 2 * radius),
y: radius + Math.random() * (H - 2 * radius),
xs: rand() * speedScale,
ys: rand() * speedScale,
cr: Math.random() * 256 | 0,
cg: Math.random() * 256 | 0,
cb: Math.random() * 256 | 0
});
}
};
var NOW, bgTime = 0;
var size = function(now, bnow, T1, T2) {
var delta = now - bnow;
if (delta < T1) {
return delta / T1;
}
if (delta < T2) {
return 1;
}
return (T1 + T2 - delta) / T1;
};
var loop = function(now) {
NOW = now;
ctx.clearRect(0, 0, W, H);
if (bgTime > 0) {
var s = (now - bgTime) / flashTime;
if (s >= 1) {
bgTime = 0;
s = 1;
}
ctx.fillStyle = 'rgba(255,255,255,' + (1 - Math.abs(s * 2 - 1)) + ')';
ctx.fillRect(0, 0, W, H);
}
var stillOpen = false;
for (var i = balls.length; i--; ) {
var status = 1;
var b = balls[i];
if (b.x === -1)
continue;
if (b.x <= radius) {
b.x = radius;
b.xs = -b.xs;
} else if (b.x >= W - radius) {
b.x = W - radius;
b.xs = -b.xs;
}
if (b.y <= radius) {
b.y = radius;
b.ys = -b.ys;
} else if (b.y >= H - radius) {
b.y = H - radius;
b.ys = -b.ys;
}
if (b.t !== 0) {
if (now - b.t > (openTime + scaleTime)) {
b.x = -1;
continue;
}
stillOpen = true;
status = size(now, b.t, scaleTime, openTime);
b.r = status * (50 - radius) + radius;
for (var j = balls.length; --j; ) {
var p = balls[j];
if (p.t === 0 && i !== j && Math.pow(p.x - b.x, 2) + Math.pow(p.y - b.y, 2) <= Math.pow(b.r + p.r, 2)) {
p.t = now;
p.xs = p.ys = 0;
eClear.innerHTML = ++numClear;
if (numClear === numNeed) {
bgTime = NOW;
}
}
}
status = 1 - status / 2;
}
b.x += b.xs;
b.y += b.ys;
ctx.fillStyle = 'rgba(' + b.cr + ',' + b.cg + ',' + b.cb + ',' + status + ')';
ctx.beginPath();
ctx.arc(b.x, b.y, b.r, 0, tau, false);
ctx.fill();
}
if (!stillOpen && lock) {
initGame();
}
window.requestAnimationFrame(loop);
};
var initGame = function() {
if (numClear >= numNeed) {
eLevel.innerHTML = ++level;
score += numClear;
}
numTotal = level * 5;
numNeed = Math.min(numTotal - 1, Math.round(Math.exp(level / 15 - 1) * numTotal)); // 15 = Until 15th question exponential growth
createBalls(numTotal);
eNeed.innerHTML = numNeed;
eTotal.innerHTML = numTotal;
eScore.innerHTML = score;
eClear.innerHTML = numClear = 0;
lock = false;
};
initGame();
window.requestAnimationFrame(loop);
canvas.onclick = function(ev) {
ev.preventDefault();
ev.stopPropagation();
if (!lock) {
lock = true;
balls[0].x = ev.pageX - 77;
balls[0].y = ev.pageY - 47;
balls[0].t = NOW;
}
};
document.onclick = function(ev) {
ev.preventDefault();
if (scaleTime === 400) {
scaleTime = 1000;
openTime = 2000;
radius = 7;
speedScale = 1;
title.style.color = 'white';
} else {
scaleTime = 400;
openTime = 1000;
radius = 3;
speedScale = 3;
title.style.color = 'black';
}
createBalls(numTotal);
};
})(this);
</script>
</body>
</html>