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 webgl - collision detection</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 {
				font-family: Monospace;
				background-color: #f0f0f0;
				margin: 0px;
				overflow: hidden;
			}

			#oldie {
				background-color: #ddd !important
			}

			#info {
				position: absolute;
				top: 30px;
				left: 10px;
				width: 800px;
				color: #000000;
				padding: 5px;
				font-family: Monospace;
				font-size: 13px;
				text-align: left;
				z-index: 100;
			}

			#options {
				position: absolute;
				top: 10px;
				left: 10px;
				width: 800px;
				color: #000000;
				padding: 5px;
				font-family: Monospace;
				font-size: 13px;
				text-align: left;
				z-index: 100;
			}
		</style>

		<script src="../build/Three.js"></script>
		<script src="js/RequestAnimationFrame.js"></script>

		<script>

			var camera, cameraTarget, scene, renderer, info, mouse2d, sun, loader, sphere;

			var range = 400, speed = 1, sphereSize = 4;

			var cubes = [];

			function init() {

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

				info = document.getElementById("info");

				camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 10000 );
				camera.position.set( 300, 120, 0 );

				mouse2d = new THREE.Vector3( 0, 0, 1 );

				loader = new THREE.Loader( true );

				scene = new THREE.Scene();

				sphere = new THREE.Mesh( new THREE.SphereGeometry( sphereSize, 10, 10 ), new THREE.MeshLambertMaterial( { color: 0xff0000 } ) );
				scene.add( sphere );

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

				var ambientLight = new THREE.AmbientLight( 0xdddddd );
				scene.add( ambientLight );

				sun = new THREE.DirectionalLight( 0xffffff );
				sun.position.set( 1, -1, 1 ).normalize();
				scene.add( sun );

				createObstacles();

				container.onmousemove = onDocumentMouseMove;
				animate();

			}

			function createObstacles(){

				createCube( 100, 50, 10, new THREE.Vector3(0, 0, 100) );

				cameraTarget = createCube( 100, 50, 10, new THREE.Vector3( 0, 0, 200 )) ;

				createCube(100, 50, 10, new THREE.Vector3(0, 0, 300));

			}

			function createCube( sx, sy, sz, p ) {

				var cube = new THREE.Mesh( new THREE.CubeGeometry( sx, sy, sz ), new THREE.MeshLambertMaterial( { color: 0x003300 } ) );
				cube.position = p;
				scene.add( cube );

				THREE.Collisions.colliders.push( THREE.CollisionUtils.MeshOBB( cube ) );
				cubes.push( cube );
				return cube;

			}

			function onDocumentMouseMove( event ){

				event.preventDefault();
				mouse2d.x = (event.clientX / window.innerWidth) * 2 - 1;
				mouse2d.y = -(event.clientY / window.innerHeight) * 2 + 1;
				mouse2d.z = 1;

			}

			function animate() {

				requestAnimationFrame( animate );

				sphere.position.z += speed;

				if( sphere.position.z > range ) sphere.position.z = 0;

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

					cubes[ i ].materials[ 0 ].color.setHex( 0x003300 );

				}

				var ray = new THREE.Ray( sphere.position, new THREE.Vector3( 0, 0, 1 ) );

				var c = THREE.Collisions.rayCastNearest( ray );

				if ( c && c.distance == -1 ) {

					info.innerHTML = "Colliding!";
					c.mesh.materials[ 0 ].color.setHex( 0xff0000 );

				} else if( c && c.distance >= 0 ) {

					info.innerHTML = "Approaching @ " + c.distance;

				} else {

					info.innerHTML = "No collider in sight.";

				}

				camera.position.x = Math.cos(mouse2d.x * Math.PI) * 300;
				camera.position.z = 200 + Math.sin(mouse2d.x * Math.PI) * 300;

				camera.lookAt( cameraTarget.position );

				renderer.render( scene, camera );

			}

			function vts(v){

				if (!v)
					return "undefined<br>";
				else
					return v.x + " , " + v.y + " , " + v.z + "<br>";

			}

		</script>
	</head>
	<body onload="init();">
		<div id="info">
		</div>
		<div id="options">
		</div>
	</body>
</html>