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c45f3fd3c8
GPG key ID:
511C112F1331BBB4
5 changed files with 590 additions and 0 deletions
BIN
ball.mp3
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BIN
ball.mp3
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dimrain47_-_twilight_techno.mp3
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dimrain47_-_twilight_techno.mp3
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edge.mp3
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edge.mp3
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108
index.html
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108
index.html
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@ -0,0 +1,108 @@
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width">
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<title>Particles</title>
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<style type="text/css" media="all">
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html, body {
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height: 100%;
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margin: 0;
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||||
padding: 0;
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||||
}
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||||
body {
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||||
background: linear-gradient(#eeeeee, #e4e4e4);
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||||
color: #999;
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||||
text-align: center;
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||||
font-family: sans-serif;
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||||
cursor: default;
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||||
}
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||||
a {
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||||
color: inherit;
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||||
}
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h1 {
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margin-top: 0;
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padding-top: 50px;
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||||
position: relative;
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||||
color: #777;
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||||
font-weight: normal;
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||||
}
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h1:before {
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content: 'Particles';
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||||
position: absolute;
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||||
top: 0;
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left: 0;
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right: 0;
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color: #888;
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height: 1.3ex;
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padding-top: 50px;
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overflow: hidden;
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}
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#gamecontainer {
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position:relative;
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width: 602px;
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height: 602px;
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margin: 0 auto;
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}
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#gamecontainer > * {
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position: absolute;
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top: 0;
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bottom: 0;
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left: 0;
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right: 0;
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}
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#message, #playbutton {
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padding-top: 50px;
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margin: 0 auto;
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text-transform: uppercase;
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letter-spacing: 5px;
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font-size: 150%;
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}
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#message div {
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opacity: 0;
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transition: opacity 1s;
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margin-top: 40px;
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line-height: 2;
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}
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#message div.visible {
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opacity: 1;
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}
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#playbutton {
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font-size: 200%;
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color: #888;
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cursor: pointer;
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padding-top: 275px;
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}
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#playbutton:hover {
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color: #222;
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}
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#background {
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background: linear-gradient(#ffffff, #f4f4f4);
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box-shadow: #f2f2f2 5px -5px 5px inset, #f2f2f2 -5px 5px 5px inset;
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position: absolute;
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border: 1px solid #ccc;
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}
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.gameon gamecontainer, .gameon canvas {
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cursor: none;
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}
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</style>
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</head>
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<body>
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<h1>Particles</h1>
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<div id="gamecontainer">
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<div id="background"></div>
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<div id="message"></div>
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<canvas id="game" width="600" height="600"></canvas>
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<div id="playbutton">Play</div>
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</div>
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<footer>
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<p>A reimplementation by Midgard of the <a href="https://www.newgrounds.com/portal/view/357700">Flash game</a> of yore by Matteo Guarnieri</p>
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<p>Music: <a href="https://dimrain47.newgrounds.com/">Dimrain47</a> – <a href="https://www.newgrounds.com/audio/listen/30208">Twilight Techno</a></p>
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</footer>
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<audio id="music" src="dimrain47_-_twilight_techno.mp3"></audio>
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<script type="text/javascript" src="main.js"></script>
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</body>
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</html>
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482
main.js
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482
main.js
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(function() {
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"use strict";
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var canvas = document.getElementById("game");
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if (!canvas.getContext) {
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alert("Your browser is unsupported (does not support canvas.getContext).");
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return;
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}
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var ctx = canvas.getContext("2d");
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var playfieldWidth = canvas.width;
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var playfieldHeight = canvas.height;
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var BALL_RADIUS = 20;
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var GRAVITY_ACCELERATION = 10;
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function message(text, expire) {
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document.getElementById("message").innerHTML = "";
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var div = document.createElement("div");
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div.innerText = text;
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document.getElementById("message").appendChild(div);
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div.className = "visible";
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if (expire === false) { return; }
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if (!expire) { expire = 2000; }
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window.setTimeout(function() {
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div.className = "";
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window.setTimeout(function() {
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try {
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div.parentNode.removeChild(div);
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} catch(e) {}
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}, 1000);
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}, expire);
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}
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function Vector(x, y) {
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this.x = x;
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this.y = y;
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}
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Vector.prototype.add = function(other) {
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return new Vector(
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this.x + other.x,
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this.y + other.y
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);
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};
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Vector.prototype.iadd = function(other) {
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this.x += other.x;
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this.y += other.y;
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};
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Vector.prototype.sub = function(other) {
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return new Vector(
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this.x - other.x,
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this.y - other.y
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);
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};
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Vector.prototype.mul = function(scalar) {
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return new Vector(
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this.x * scalar,
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this.y * scalar
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);
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};
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Vector.prototype.dot = function(other) {
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return this.x * other.x + this.y * other.y;
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};
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Vector.prototype.normSquared = function() {
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return this.dot(this);
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};
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Vector.prototype.norm = function() {
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return Math.sqrt(this.normSquared(this));
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};
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Vector.prototype.distance_squared = function(other) {
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var diffX = this.x - other.x;
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var diffY = this.y - other.y;
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return diffX * diffX + diffY * diffY;
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};
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Vector.prototype.toString = function() {
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return "Vector(" + this.x + ", " + this.y + ")";
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};
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function Circle(centre, radius) {
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this.centre = centre;
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this.radius = radius;
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}
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Circle.prototype.intersects = function(other) {
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return (
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this.centre.distance_squared(other.centre)
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<=
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2 * this.radius * 2 * this.radius
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);
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}
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Circle.prototype.toString = function(other) {
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return "Circle(centre=" + this.centre.toString() + ", radius=" + this.radius + ")";
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}
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function Ball(outline, velocity, colour, ghost) {
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this.outline = outline;
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this.velocity = velocity;
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this.colour = colour;
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this.ghost = ghost;
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this.audioBall = new Audio("ball.mp3");
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this.audioEdge = new Audio("edge.mp3");
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}
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Ball.prototype.toString = function() {
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return (
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"Ball(outline=" + this.outline.toString() + "," +
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"velocity=" + this.velocity.toString() + ", " +
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"colour=" + this.colour + ", ghost=" + this.ghost + ")"
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);
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}
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function intersectsExistingBall(circle) {
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for (var i = 0; i < balls.length; i++) {
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if (circle.intersects(balls[i].outline)) {
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return true;
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}
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}
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return false;
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}
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function bogoGenerateNewBallOutline() {
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var circle;
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do {
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circle = new Circle(
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new Vector(
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Math.random() * (playfieldWidth - 2*BALL_RADIUS) + BALL_RADIUS,
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Math.random() * (playfieldHeight - 2*BALL_RADIUS) + BALL_RADIUS
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),
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BALL_RADIUS
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);
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} while (intersectsExistingBall(circle));
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return circle;
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}
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function bogoGenerateVelocity() {
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var vec;
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do {
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vec = new Vector(
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Math.random() * 10 - 2,
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Math.random() * 10 - 2
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);
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} while (vec.normSquared < 2);
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return vec;
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}
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var playerBall;
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var balls = [];
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function addBall(ghost) {
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var newBall = new Ball(
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bogoGenerateNewBallOutline(),
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bogoGenerateVelocity(),
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"red",
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ghost
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);
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balls.push(newBall);
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}
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var isGameOver = true;
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function advanceBall(ball, timePassed) {
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if (ball.ghost != 0) {
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ball.ghost -= timePassed / 1000;
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if (ball.ghost <= 0) {
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ball.ghost = 0;
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}
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if (!isGameOver) {
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return;
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}
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}
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ball.outline.centre.iadd(
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ball.velocity.mul(timePassed / 20)
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);
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}
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function bounceBalls(ball1, ball2) {
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var x1 = ball1.outline.centre;
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var x2 = ball2.outline.centre;
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var v1 = ball1.velocity;
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var v2 = ball2.velocity;
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var x_diff1 = x1.sub(x2);
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var x_diff2 = x2.sub(x1);
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var collisionForce = v1.sub(v2).norm();
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ball1.audioBall.pause();
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ball1.audioBall.currentTime = 0;
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ball1.audioBall.volume = clamp(collisionForce / 10 + 0.1, 0, 1);
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ball1.audioBall.play();
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// https://en.wikipedia.org/w/index.php?title=Elastic_collision&oldid=1057236793#Two-dimensional_collision_with_two_moving_objects
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ball1.velocity = v1.sub(x_diff1.mul((v1.sub(v2).dot(x_diff1)) / x_diff1.normSquared()));
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ball2.velocity = v2.sub(x_diff2.mul((v2.sub(v1).dot(x_diff2)) / x_diff2.normSquared()));
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// Make balls non-intersecting
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var c = x1.add(x2).mul(1/2)
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ball1.outline.centre = c.add(x1.sub(c).mul((ball1.outline.radius + 0.05) / x1.sub(c).norm()));
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ball2.outline.centre = c.add(x2.sub(c).mul((ball2.outline.radius + 0.05) / x2.sub(c).norm()));
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}
|
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|
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function handleBounceEdge(ball, ignoreBottom) {
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var bounce = false;
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|
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if (ball.outline.centre.x <= ball.outline.radius) {
|
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ball.velocity.x *= -1;
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ball.outline.centre.x = ball.outline.radius + (ball.outline.radius - ball.outline.centre.x);
|
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bounce = true;
|
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}
|
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if (ball.outline.centre.y <= ball.outline.radius) {
|
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ball.velocity.y *= -1;
|
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ball.outline.centre.y = ball.outline.radius + (ball.outline.radius - ball.outline.centre.y);
|
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bounce = true;
|
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}
|
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|
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var maxX = playfieldWidth - ball.outline.radius;
|
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var maxY = playfieldHeight - ball.outline.radius;
|
||||
|
||||
if (ball.outline.centre.x >= maxX) {
|
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ball.velocity.x *= -1;
|
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ball.outline.centre.x = maxX + (maxX - ball.outline.centre.x);
|
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bounce = true;
|
||||
}
|
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if (ball.outline.centre.y >= maxY && !ignoreBottom) {
|
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ball.velocity.y *= -1;
|
||||
ball.outline.centre.y = maxY + (maxY - ball.outline.centre.y);
|
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bounce = true;
|
||||
}
|
||||
|
||||
if (bounce) {
|
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ball.audioEdge.pause();
|
||||
ball.audioEdge.currentTime = 0;
|
||||
ball.audioEdge.volume = clamp(ball.velocity.norm() / 3 + 0.1, 0, 1);
|
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ball.audioEdge.play();
|
||||
}
|
||||
}
|
||||
|
||||
function checkPlayerCollision() {
|
||||
for (var i = 1; i < balls.length; i++) {
|
||||
if (balls[i].ghost == 0 && playerBall.outline.intersects(balls[i].outline)) {
|
||||
bounceBalls(playerBall, balls[i]);
|
||||
gameOver();
|
||||
return;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
function checkBallCollision(includingPlayerBall) {
|
||||
var start = includingPlayerBall ? 0 : 1;
|
||||
|
||||
for (var i = start; i < balls.length; i++)
|
||||
for (var j = i + 1; j < balls.length; j++) {
|
||||
if (
|
||||
balls[i].outline.intersects(balls[j].outline) &&
|
||||
(
|
||||
(balls[i].ghost == 0 && balls[j].ghost == 0) ||
|
||||
isGameOver
|
||||
)
|
||||
) {
|
||||
bounceBalls(balls[i], balls[j]);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
function gravity(ball, timePassed) {
|
||||
ball.velocity.y += GRAVITY_ACCELERATION * timePassed / 1000;
|
||||
}
|
||||
|
||||
function allFallen() {
|
||||
for (var i = 0; i < balls.length; i++) {
|
||||
if (balls[i].outline.centre.y < playfieldHeight + balls[i].outline.radius) {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
var colorGradients = {
|
||||
"blue": [
|
||||
[0, "#2b2bff"],
|
||||
[0.5, "#1212eb"],
|
||||
[1, "#000092"]
|
||||
],
|
||||
"red": [
|
||||
[0, "#ff2b2b"],
|
||||
[0.5, "#eb1212"],
|
||||
[1, "#920000"]
|
||||
]
|
||||
};
|
||||
|
||||
function drawBall(ball) {
|
||||
var x = ball.outline.centre.x;
|
||||
var y = ball.outline.centre.y;
|
||||
var r = ball.outline.radius;
|
||||
|
||||
ctx.beginPath();
|
||||
ctx.globalAlpha = 1 - ball.ghost;
|
||||
ctx.arc(x, y, ball.outline.radius, 0, Math.PI * 2, true);
|
||||
|
||||
var gradient = ctx.createRadialGradient(x+r*.75,y-r*.75,0, x,y,r*1.1);
|
||||
for (var i in colorGradients[ball.colour]) {
|
||||
gradient.addColorStop(
|
||||
colorGradients[ball.colour][i][0],
|
||||
colorGradients[ball.colour][i][1]
|
||||
);
|
||||
}
|
||||
ctx.fillStyle = gradient;
|
||||
|
||||
ctx.closePath();
|
||||
ctx.fill();
|
||||
}
|
||||
|
||||
function draw() {
|
||||
ctx.clearRect(0, 0, canvas.width, canvas.height);
|
||||
for (var i = balls.length - 1; i >= 0; i--) {
|
||||
drawBall(balls[i]);
|
||||
}
|
||||
}
|
||||
|
||||
var gameStarted = null;
|
||||
var previousTime = -1;
|
||||
function gameLoop(timestamp) {
|
||||
if (previousTime == -1) {
|
||||
previousTime = timestamp;
|
||||
}
|
||||
var timePassed = timestamp - previousTime;
|
||||
|
||||
checkPlayerCollision();
|
||||
for (var i = 1; i < balls.length; i++) {
|
||||
advanceBall(balls[i], timePassed);
|
||||
handleBounceEdge(balls[i]);
|
||||
}
|
||||
checkBallCollision(false);
|
||||
|
||||
draw();
|
||||
|
||||
previousTime = timestamp;
|
||||
if (!isGameOver) {
|
||||
requestAnimationFrame(gameLoop);
|
||||
} else {
|
||||
requestAnimationFrame(gameOverLoop);
|
||||
}
|
||||
}
|
||||
|
||||
function gameOver() {
|
||||
console.log("Game over");
|
||||
var gameDuration = new Date() - gameStarted;
|
||||
message(
|
||||
"You reached " + (balls.length - 1) + " balls\n" +
|
||||
"You lasted " + Math.floor(gameDuration / 1000) + " seconds",
|
||||
false);
|
||||
document.getElementById("playbutton").innerHTML = "Play again";
|
||||
if (ballAddTimeout !== null) {
|
||||
window.clearTimeout(ballAddTimeout);
|
||||
}
|
||||
isGameOver = true;
|
||||
|
||||
fadeOutMusic();
|
||||
|
||||
document.body.className = "gameover";
|
||||
}
|
||||
function fadeOutMusic() {
|
||||
if (!isGameOver) return;
|
||||
if (document.getElementById("music").volume > 0.01) {
|
||||
document.getElementById("music").volume *= 0.8;
|
||||
window.setTimeout(fadeOutMusic, 100);
|
||||
} else {
|
||||
document.getElementById("music").pause();
|
||||
}
|
||||
}
|
||||
|
||||
function gameOverLoop(timestamp) {
|
||||
var timePassed = timestamp - previousTime;
|
||||
|
||||
for (var i = 0; i < balls.length; i++) {
|
||||
gravity(balls[i], timePassed);
|
||||
advanceBall(balls[i], timePassed);
|
||||
handleBounceEdge(balls[i], true);
|
||||
}
|
||||
checkBallCollision(true);
|
||||
|
||||
draw();
|
||||
|
||||
previousTime = timestamp;
|
||||
if (!allFallen(balls)) {
|
||||
requestAnimationFrame(gameOverLoop);
|
||||
} else {
|
||||
prepareStartButton();
|
||||
}
|
||||
}
|
||||
|
||||
function clamp(value, min, max) {
|
||||
return Math.max(min, Math.min(max, value));
|
||||
}
|
||||
|
||||
function moveMouseCallback(event) {
|
||||
if (isGameOver) return;
|
||||
// move player
|
||||
var previousPosition = playerBall.outline.centre;
|
||||
|
||||
var newPosition = new Vector(
|
||||
clamp(event.clientX - document.getElementById("gamecontainer").offsetLeft, BALL_RADIUS, playfieldWidth - BALL_RADIUS),
|
||||
clamp(event.clientY - document.getElementById("gamecontainer").offsetTop, BALL_RADIUS, playfieldHeight - BALL_RADIUS)
|
||||
);
|
||||
playerBall.outline.centre = newPosition;
|
||||
playerBall.velocity = newPosition.sub(previousPosition).mul(0.1);
|
||||
}
|
||||
document.body.addEventListener("mousemove", moveMouseCallback);
|
||||
document.body.addEventListener("mousein", moveMouseCallback);
|
||||
|
||||
var ballAddTimeout = null;
|
||||
var ballAddMessages = [
|
||||
["3 balls\nEasy peasy", 15],
|
||||
["4 balls\nStill quite easy", 20],
|
||||
["5 balls\nFun begins now", 30],
|
||||
["6 balls\nQuite challenging", 35],
|
||||
["7 balls\nPretty tough", 40],
|
||||
["8 balls\nVery tricky", 50],
|
||||
["9 balls\nTerribly hard", 60],
|
||||
["10 balls\nIncredibly tough", 60],
|
||||
["11 balls\nInsanely difficult", 60],
|
||||
["12 balls\nAbsolutely crazy", 60],
|
||||
["13 balls\nCompletely mad", 60],
|
||||
["14 balls\nAlmost impossible", 60],
|
||||
["15 balls\nMaxed out", 60]
|
||||
];
|
||||
function ballAddTimeoutFunction() {
|
||||
if (balls.length - 2 > ballAddMessages.length) {
|
||||
return;
|
||||
}
|
||||
addBall(1);
|
||||
var addMessage = ballAddMessages[balls.length - 4];
|
||||
message(addMessage[0]);
|
||||
ballAddTimeout = window.setTimeout(ballAddTimeoutFunction, addMessage[1] * 1000);
|
||||
}
|
||||
|
||||
function startGame() {
|
||||
document.getElementById("music").currentTime = 0;
|
||||
document.getElementById("music").volume = 0.5;
|
||||
document.getElementById("music").play();
|
||||
document.getElementById("playbutton").style.display = "none";
|
||||
|
||||
playerBall = new Ball(
|
||||
new Circle(
|
||||
new Vector(
|
||||
canvas.width / 2 - BALL_RADIUS,
|
||||
canvas.height / 2 - BALL_RADIUS
|
||||
),
|
||||
BALL_RADIUS
|
||||
),
|
||||
new Vector(0, 0),
|
||||
"blue",
|
||||
0
|
||||
);
|
||||
balls = [playerBall];
|
||||
|
||||
for (var i = 0; i < 2; i++) {
|
||||
addBall(1);
|
||||
}
|
||||
console.log(`${balls.length} balls`);
|
||||
ballAddTimeoutFunction();
|
||||
|
||||
|
||||
isGameOver = false;
|
||||
previousTime = -1;
|
||||
requestAnimationFrame(gameLoop);
|
||||
gameStarted = new Date();
|
||||
document.body.className = "gameon";
|
||||
}
|
||||
|
||||
function prepareStartButton() {
|
||||
document.getElementById("playbutton").style.display = "block";
|
||||
document.getElementById("playbutton").onclick = startGame;
|
||||
}
|
||||
|
||||
prepareStartButton();
|
||||
|
||||
})();
|
||||
Loading…
Reference in a new issue