javascript
/
three.js
mirror of https://github.com/tazdij/three.js.git


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webaudio - timing</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:#777;
				padding:0;
				margin:0;
				font-weight: bold;
				overflow:hidden;
			}

			#info {
				position: absolute;
				top: 0px;
				width: 100%;
				color: #ffffff;
				padding: 5px;
				font-family:Monospace;
				font-size:13px;
				text-align:center;
			}

			a {
				color: #ffffff;
			}
		</style>

		<script src="../build/three.js"></script>
		<script src="js/Detector.js"></script>
		<script src="js/controls/OrbitControls.js"></script>

	</head>
<body>

	<div id="container"></div>
	<div id="info">
		<a href="https://threejs.org" target="_blank" rel="noopener noreferrer">three.js</a> webaudio timing | sound effect by <a href="https://freesound.org/people/michorvath/sounds/269718/" target="_blank" rel="noopener noreferrer">michorvath</a>
	</div>

	<script>

	if ( ! Detector.webgl ) Detector.addGetWebGLMessage();

	var scene, camera, renderer, audio;

	var objects = [];

	init();

	function init() {

		var container = document.getElementById( 'container' );

		scene = new THREE.Scene();

		//

		camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 0.1, 100 );
		camera.position.set( 7, 3, 7 );

		// lights

		var ambientLight = new THREE.AmbientLight( 0xcccccc, 0.4 );
		scene.add( ambientLight );

		var directionalLight = new THREE.DirectionalLight( 0xffffff, 0.7 );
		directionalLight.position.set( 0, 5, 5 );
		scene.add( directionalLight );

		var d = 5;
		directionalLight.castShadow = true;
		directionalLight.shadow.camera.left = - d;
		directionalLight.shadow.camera.right = d;
		directionalLight.shadow.camera.top = d;
		directionalLight.shadow.camera.bottom = - d;

		directionalLight.shadow.camera.near = 1;
		directionalLight.shadow.camera.far = 20;

		directionalLight.shadow.mapSize.x = 1024;
		directionalLight.shadow.mapSize.y = 1024;

		// audio

		var audioLoader = new THREE.AudioLoader();

		var listener = new THREE.AudioListener();
		camera.add( listener );

		// floor

		var floorGeometry = new THREE.PlaneBufferGeometry( 10, 10 );
		var floorMaterial = new THREE.MeshLambertMaterial( { color: 0x4676b6 } );

		var floor = new THREE.Mesh( floorGeometry, floorMaterial );
		floor.rotation.x = Math.PI * - 0.5;
		floor.receiveShadow = true;
		scene.add( floor );

		// objects

		var count = 5;
		var radius = 3;

		var ballGeometry = new THREE.SphereBufferGeometry( 0.3, 32, 16 );
		ballGeometry.translate( 0, 0.3, 0 );
		var ballMaterial = new THREE.MeshLambertMaterial( { color: 0xcccccc } );

		// create objects when audio buffer is loaded

		audioLoader.load( 'sounds/ping_pong.mp3', function ( buffer ) {

			for ( var i = 0; i < count; i ++ ) {

				var s = i / count * Math.PI * 2;

				var ball = new THREE.Mesh( ballGeometry, ballMaterial );
				ball.castShadow = true;
				ball.userData.down = false;

				ball.position.x = radius * Math.cos( s );
				ball.position.z = radius * Math.sin( s );

				var audio = new THREE.PositionalAudio( listener );
				audio.setBuffer( buffer );
				ball.add( audio );

				scene.add( ball );
				objects.push( ball );

			}

			animate();

		} );

		//

		renderer = new THREE.WebGLRenderer( { antialias: true } );
		renderer.shadowMap.enabled = true;
		renderer.setSize( window.innerWidth, window.innerHeight );
		renderer.setClearColor( 0x000000 );
		renderer.setPixelRatio( window.devicePixelRatio );
		container.appendChild( renderer.domElement );

		//

		var controls = new THREE.OrbitControls( camera, renderer.domElement );
		controls.minDistance = 1;
		controls.maxDistance = 25;

		//

		window.addEventListener( 'resize', onWindowResize, false );

	}

	function onWindowResize( event ) {

		camera.aspect = window.innerWidth / window.innerHeight;
		camera.updateProjectionMatrix();

		renderer.setSize( window.innerWidth, window.innerHeight );

	}

	function animate() {

		requestAnimationFrame( animate );

		render();

	}

	var speed = 1.7;
	var height = 3;
	var offset = 0.5;
	var time = 0;

	function render() {

		time += 0.02;

		for ( var i = 0; i < objects.length; i ++ ) {

			var ball = objects[ i ];

			var previousHeight = ball.position.y;
			ball.position.y = Math.abs( Math.sin( i * offset + ( time * speed ) ) * height );

			if ( ball.position.y < previousHeight ) {

				ball.userData.down = true;

			} else {

				if ( ball.userData.down === true ) {

					// ball changed direction from down to up

					var audio = ball.children[ 0 ];
					audio.play(); // play audio with perfect timing when ball hits the surface
					ball.userData.down = false;

				}

			}

		}

		renderer.render( scene, camera );

	}

	</script>

</body>
</html>