cannon
Version:
A lightweight 3D physics engine written in JavaScript.
65 lines (55 loc) • 2 kB
HTML
<html>
<head>
<title>cannon.js - spring demo</title>
<meta charset="utf-8">
<link rel="stylesheet" href="css/style.css" type="text/css"/>
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
</head>
<body>
<script src="../build/cannon.js"></script>
<script src="../build/cannon.demo.js"></script>
<script src="../libs/dat.gui.js"></script>
<script src="../libs/Three.js"></script>
<script src="../libs/TrackballControls.js"></script>
<script src="../libs/Detector.js"></script>
<script src="../libs/Stats.js"></script>
<script src="../libs/smoothie.js"></script>
<script>
var demo = new CANNON.Demo();
var size = 1;
demo.addScene("Box",function(){
// Create world
var world = demo.getWorld();
world.gravity.set(0,0,-10);
world.broadphase = new CANNON.NaiveBroadphase();
// Create a static sphere
var sphereShape = new CANNON.Sphere(0.1),
sphereBody = new CANNON.Body({ mass: 0 });
sphereBody.addShape(sphereShape);
world.add(sphereBody);
demo.addVisual(sphereBody);
// Create a box body
var halfExtents = new CANNON.Vec3(size,size*0.3,size),
boxShape = new CANNON.Box(halfExtents);
boxBody = new CANNON.Body({ mass: 5 });
boxBody.addShape(boxShape);
boxBody.position.set(-size,0,-size);
world.add(boxBody);
demo.addVisual(boxBody);
var spring = new CANNON.Spring(boxBody,sphereBody,{
localAnchorA: new CANNON.Vec3(size,0,size),
localAnchorB: new CANNON.Vec3(0,0,0),
restLength : 0,
stiffness : 50,
damping : 1,
});
// Compute the force after each step
world.addEventListener("postStep",function(event){
spring.applyForce();
});
});
demo.start();
</script>
</body>
</html>