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<!DOCTYPE html>
<html lang="en">
<head>
<title>tracking.js + three.js - random particles</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<style>
body {
background-color: #000;
margin: 0px;
overflow: hidden;
}
video {
background: #fff;
border: 3px solid #f2f2f2;
bottom: 0;
right: 0;
position: absolute;
}
#rectangle {
height: 80px;
left: -1000px;
position: absolute;
top: -1000px;
width: 120px;
z-index: 1;
}
</style>
</head>
<body>
<div id="rectangle"></div>
<!-- <audio src="http://cl.ly/WPV8/jungle-busy-earnin.mp3" loop autoplay></audio> -->
<video id="video" width="320" height="240" preload autoplay loop muted>
<script src="../build/tracking-min.js"></script>
<script src="../bower_components/threejs/build/three.min.js"></script>
<script>
var container;
var camera, scene, renderer, group, particle;
var mouseX = 0, mouseY = 0;
var rectangle = tracking.one('#rectangle');
var video = document.querySelector('#video');
var windowHalfX = window.innerWidth / 2;
var windowHalfY = window.innerHeight / 2;
init();
animate();
window.onload = function() {
var tracker = new tracking.ColorTracker();
tracking.track('#video', tracker, { camera: true });
tracker.on('track', onColorMove);
};
function init() {
container = document.createElement('div');
document.body.appendChild(container);
camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 1, 3000);
camera.position.z = 1000;
scene = new THREE.Scene();
var PI2 = Math.PI * 2;
var program = function (context) {
context.beginPath();
context.arc(0, 0, 0.5, 0, PI2, true);
context.fill();
}
group = new THREE.Object3D();
scene.add(group);
for (var i = 0; i < 1000; i++) {
var material = new THREE.SpriteCanvasMaterial({
color: Math.random() * 0x808008 + 0x808080,
program: program
});
particle = new THREE.Sprite(material);
particle.position.x = Math.random() * 2000 - 1000;
particle.position.y = Math.random() * 2000 - 1000;
particle.position.z = Math.random() * 2000 - 1000;
particle.scale.x = particle.scale.y = Math.random() * 20 + 10;
group.add(particle);
}
renderer = new THREE.CanvasRenderer();
renderer.setSize(window.innerWidth, window.innerHeight);
container.appendChild(renderer.domElement);
window.addEventListener('resize', onWindowResize, false);
}
function onWindowResize() {
windowHalfX = window.innerWidth / 2;
windowHalfY = window.innerHeight / 2;
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);
}
function onColorMove(event) {
if (event.data.length === 0) {
rectangle.style.top = '-1000px';
return;
}
var rect = event.data[0];
rectangle.style.border = '2px solid ' + rect.color;
rectangle.style.width = rect.width + 'px';
rectangle.style.height = rect.height + 'px';
rectangle.style.left = (video.offsetLeft + rect.x) + 'px';
rectangle.style.top = (video.offsetTop + rect.y) + 'px';
var x = rect.x + (rect.width >> 1);
var y = rect.y + (rect.height >> 1);
mouseX = (((320 - x) / 320) * window.innerWidth) - windowHalfX;
mouseY = (((240 - y) / 240) * window.innerHeight) - windowHalfY;
}
function animate() {
requestAnimationFrame(animate);
render();
}
function render() {
camera.position.x += (mouseX - camera.position.x) * 0.05;
camera.position.y += (- mouseY - camera.position.y) * 0.05;
camera.lookAt(scene.position);
group.rotation.x += 0.01;
group.rotation.y += 0.02;
renderer.render(scene, camera);
}
</script>
</body>
</html>