cannon
Version:
A lightweight 3D physics engine written in JavaScript.
75 lines (66 loc) • 2.68 kB
HTML
<html>
<head>
<title>cannon.js - Heightfield 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();
demo.addScene("Heightfield", function () {
// Init world
var world = demo.getWorld();
world.gravity.set(0, 0, -10);
world.broadphase = new CANNON.NaiveBroadphase();
// Create a matrix of height values
var matrix = [];
var sizeX = 15,
sizeY = 15;
for (var i = 0; i < sizeX; i++) {
matrix.push([]);
for (var j = 0; j < sizeY; j++) {
var height = Math.cos(i/sizeX * Math.PI * 2)*Math.cos(j/sizeY * Math.PI * 2) + 2;
if(i===0 || i === sizeX-1 || j===0 || j === sizeY-1)
height = 3;
matrix[i].push(height);
}
}
// Create the heightfield
var hfShape = new CANNON.Heightfield(matrix, {
elementSize: 1
});
var hfBody = new CANNON.Body({ mass: 0 });
hfBody.addShape(hfShape);
hfBody.position.set(-sizeX * hfShape.elementSize / 2, -20, -10);
world.add(hfBody);
demo.addVisual(hfBody);
// Add spheres
var mass = 1;
for(var i=0; i<sizeX - 1; i++){
for (var j = 0; j < sizeY - 1; j++) {
if(i===0 || i >= sizeX-2 || j===0 || j >= sizeY-2)
continue;
var sphereShape = new CANNON.Sphere(0.1);
var sphereBody = new CANNON.Body({ mass: mass });
sphereBody.addShape(sphereShape);
sphereBody.position.set(0.25 + i, 0.25 + j, 3);
sphereBody.position.vadd(hfBody.position, sphereBody.position);
world.add(sphereBody);
demo.addVisual(sphereBody);
}
}
});
demo.start();
</script>
</body>
</html>