verlet
Version:
simple 2d physics for js.
74 lines (61 loc) • 2.51 kB
HTML
<html lang="en">
<head>
<title>Verlet Shapes</title>
<meta charset="UTF-8" />
<link rel="stylesheet" href="../css/style.css" type="text/css" media="screen, projection" />
<link href='http://fonts.googleapis.com/css?family=Libre+Baskerville:400,700,400italic' rel='stylesheet' type='text/css'>
<script type="text/javascript" src="../js/verlet-1.0.0.js"></script>
</head>
<body>
<script type="text/javascript" src="../site/js/common.js"></script>
<div id="header">
<h1><a href="../">verlet-js</a> / <em>Shapes</em></h1>
<div id="bsa">
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</div>
<p>
<h4>Author</h4>
<a href="http://subprotocol.com/">Sub Protocol</a>
<h4>Summary</h4>
This is the <i>hello world</i> of Verlet-JS. Simple shapes generated using VerletJS.prototype.tire(origin, radius, segments, spokeStiffness, treadStiffness). Also demonstrating various constraint stiffness coefficients. All objects are draggable.
<h4>Source Code</h4>
<a href="https://github.com/subprotocol/verlet-js/blob/master/examples/shapes.html">View on GitHub</a>
</p>
</div>
<canvas id="scratch" style="width: 800px; height: 500px;"></canvas>
<script type="text/javascript">
window.onload = function() {
var canvas = document.getElementById("scratch");
// canvas dimensions
var width = parseInt(canvas.style.width);
var height = parseInt(canvas.style.height);
// retina
var dpr = window.devicePixelRatio || 1;
canvas.width = width*dpr;
canvas.height = height*dpr;
canvas.getContext("2d").scale(dpr, dpr);
// simulation
var sim = new VerletJS(width, height, canvas);
sim.friction = 1;
// entities
var segment = sim.lineSegments([new Vec2(20,10), new Vec2(40,10), new Vec2(60,10), new Vec2(80,10), new Vec2(100,10)], 0.02);
var pin = segment.pin(0);
var pin = segment.pin(4);
var tire1 = sim.tire(new Vec2(200,50), 50, 30, 0.3, 0.9);
var tire2 = sim.tire(new Vec2(400,50), 70, 7, 0.1, 0.2);
var tire3 = sim.tire(new Vec2(600,50), 70, 3, 1, 1);
// animation loop
var loop = function() {
sim.frame(16);
sim.draw();
requestAnimFrame(loop);
};
loop();
};
</script>
<div id="footer">
Copyright 2013 Sub Protocol and other contributors.
<br/><a href="http://subprotocol.com/">http://subprotocol.com/</a>
</div>
</body>