examples/canvas_particles_waves.html

<!DOCTYPE HTML>
<html lang="en">
	<head>
		<title>three.js canvas - particles - waves</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width; initial-scale=1.0; maximum-scale=1.0; user-scalable=0;"/>
		<style type="text/css">
			body {
				background-color: #000000;
				margin: 0px;
				overflow: hidden;
			}

			a {
				color:#0078ff;
			}
		</style>
	</head>
	<body>
		<script type="text/javascript" src="../build/Three.js"></script>

		<script type="text/javascript" src="js/RequestAnimationFrame.js"></script>
		<script type="text/javascript" src="js/Stats.js"></script>

		<script type="text/javascript">

			var SEPARATION = 100, AMOUNTX = 50, AMOUNTY = 50;

			var container, stats;
			var camera, scene, renderer;

			var particles, particle, count = 0;

			var mouseX = 0, mouseY = 0;

			var windowHalfX = window.innerWidth / 2;
			var windowHalfY = window.innerHeight / 2;

			init();
			animate();

			function init() {

				container = document.createElement( 'div' );
				document.body.appendChild( container );

				camera = new THREE.Camera( 75, window.innerWidth / window.innerHeight, 1, 10000 );
				camera.position.z = 1000;

				scene = new THREE.Scene();

				particles = new Array();

				var PI2 = Math.PI * 2;
				var material = new THREE.ParticleCanvasMaterial( {

					color: 0xffffff,
					program: function ( context ) {

						context.beginPath();
						context.arc( 0, 0, 1, 0, PI2, true );
						context.closePath();
						context.stroke();

					}

				} );

				var i = 0;

				for ( var ix = 0; ix < AMOUNTX; ix ++ ) {

					for ( var iy = 0; iy < AMOUNTY; iy ++ ) {

						particle = particles[ i ++ ] = new THREE.Particle( material );
						particle.position.x = ix * SEPARATION - ( ( AMOUNTX * SEPARATION ) / 2 );
						particle.position.z = iy * SEPARATION - ( ( AMOUNTY * SEPARATION ) / 2 );
						scene.addObject( particle );

					}

				}

				renderer = new THREE.CanvasRenderer();
				renderer.setSize( window.innerWidth, window.innerHeight );
				container.appendChild( renderer.domElement );

				stats = new Stats();
				stats.domElement.style.position = 'absolute';
				stats.domElement.style.top = '0px';
				container.appendChild( stats.domElement );

				document.addEventListener( 'mousemove', onDocumentMouseMove, false );
				document.addEventListener( 'touchstart', onDocumentTouchStart, false );
				document.addEventListener( 'touchmove', onDocumentTouchMove, false );
			}

			//

			function onDocumentMouseMove( event ) {

				mouseX = event.clientX - windowHalfX;
				mouseY = event.clientY - windowHalfY;

			}

			function onDocumentTouchStart( event ) {

				if ( event.touches.length == 1 ) {

					event.preventDefault();

					mouseX = event.touches[ 0 ].pageX - windowHalfX;
					mouseY = event.touches[ 0 ].pageY - windowHalfY;

				}

			}

			function onDocumentTouchMove( event ) {

				if ( event.touches.length == 1 ) {

					event.preventDefault();

					mouseX = event.touches[ 0 ].pageX - windowHalfX;
					mouseY = event.touches[ 0 ].pageY - windowHalfY;

				}

			}

			//

			function animate() {

				requestAnimationFrame( animate );

				render();
				stats.update();

			}

			function render() {

				camera.position.x += ( mouseX - camera.position.x ) * .05;
				camera.position.y += ( - mouseY - camera.position.y ) * .05;

				var i = 0;

				for ( var ix = 0; ix < AMOUNTX; ix ++ ) {

					for ( var iy = 0; iy < AMOUNTY; iy ++ ) {

						particle = particles[ i++ ];
						particle.position.y = ( Math.sin( ( ix + count ) * 0.3 ) * 50 ) + ( Math.sin( ( iy + count ) * 0.5 ) * 50 );
						particle.scale.x = particle.scale.y = ( Math.sin( ( ix + count ) * 0.3 ) + 1 ) * 2 + ( Math.sin( ( iy + count ) * 0.5 ) + 1 ) * 2;

					}
				}

				renderer.render( scene, camera );

				count += 0.1;

			}

		</script>
	</body>
</html>