javascript
/
three.js
peilaus alkaen https://github.com/tazdij/three.js.git


			
				
					
						
						
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							<!doctype html>
<html lang="en">
	<head>
		<title>three.js webgl - intersection: ray with sphere/AABB/plane</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: 150px;
				width: 800px;
				color: #000000;
				padding: 5px;
				font-family: Monospace;
				font-size: 13px;
				text-align: left;
				z-index: 100;
			}

			#options {
				position: absolute;
				top: 10px;
				left: 150px;
				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 src="js/Stats.js"></script>

		<script>

			var camera, scene, projector, renderer,
			info, mouse = { x: 0, y: 0 }, sun;

			var theta = 0;
			var camdist = 1500;
			var geoms = [];

			function init () {

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

				info = document.getElementById("info");

				camera = new THREE.Camera(40, window.innerWidth / window.innerHeight, 1, 10000);
				camera.useTarget = true;

				scene = new THREE.Scene();

				projector = new THREE.Projector();

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

				var ambientLight = new THREE.AmbientLight(0x606060);
				scene.add(ambientLight);

				sun = new THREE.DirectionalLight(0xffffff);
				scene.add(sun);

				makeWall(240);
				makeWall(120);
				makeWall(0);
				makeWall(-120);
				makeWall(-240);

				plane = new THREE.Mesh( new THREE.PlaneGeometry( 30000, 30000, 10, 10 ), new THREE.MeshLambertMaterial( { color: 0x003300 } ) );
				plane.position.y = - 480;
				plane.rotation.x = Math.PI / - 2;
				scene.add( plane );
				geoms.push( plane );

				var cplane = new THREE.PlaneCollider( plane.position, new THREE.Vector3( 0, 1, 0 ) );
				cplane.mesh = plane;
				THREE.Collisions.colliders.push( cplane );

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

				container.onmousemove = onDocumentMouseMove;
				animate();

			}

			function makeWall(z){
				var mx = 120 * 2;
				for (var i = -mx; i <= mx; i += 120) {
					for (var j = -mx; j <= mx; j += 120) {
					if (Math.random() > 0.5)
						createCube(100, new THREE.Vector3(j, i, z));
					else
						createSphere(50, new THREE.Vector3(j, i, z));
					}
				}
			}

			function createCube(s, p){
				var cube = new THREE.Mesh(new THREE.CubeGeometry( s, s, s ), new THREE.MeshLambertMaterial( { color: 0x003300 } ) );
				cube.position = p;
				scene.add(cube);
				geoms.push(cube);
				THREE.Collisions.colliders.push(THREE.CollisionUtils.MeshAABB(cube, p));
			}

			function createSphere(rad, p){
				var sphere = new THREE.Mesh( new THREE.SphereGeometry( rad, 10, 10 ), new THREE.MeshLambertMaterial( { color: 0x003300 } ) );
				sphere.position = p;
				scene.add(sphere);
				geoms.push(sphere);

				var sc = new THREE.SphereCollider(p, rad);
				sc.mesh = sphere;
				THREE.Collisions.colliders.push(sc);
			}

			function onDocumentMouseMove(event){
				event.preventDefault();
				mouse.x = (event.clientX / window.innerWidth) * 2 - 1;
				mouse.y = -(event.clientY / window.innerHeight) * 2 + 1;
			}

			function animate(){

				requestAnimationFrame( animate );

				var vector = new THREE.Vector3( mouse.x, mouse.y, 0.5 );
				projector.unprojectVector( vector, camera );

				var ray = new THREE.Ray( camera.position, vector.subSelf( camera.position ).normalize() );

				for ( var i = 0; i < geoms.length; i++) {
					geoms[i].materials[0].color = new THREE.Color(0x007700);
				}

				if ( !document.getElementById( "nearest" ).checked ) {

					// Raycast all

					ts = new Date().getTime();
					var cs = THREE.Collisions.rayCastAll( ray );
					tt = new Date().getTime() - ts;

					if ( cs.length > 0 ) {

						info.innerHTML = cs.length + " colliders found in " + tt;

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

							cs[ i ].mesh.materials[ 0 ].color.setHex( 0xaa0000 );

						}

					} else {

						info.innerHTML = "No intersection";

					}

				} else {

					// Raycast nearest

					ts = new Date().getTime();
					var c = THREE.Collisions.rayCastNearest( ray );
					tt = new Date().getTime() - ts;

					if ( c ) {

						info.innerHTML = "Found in " + tt + " @ distance " + c.distance;
						c.mesh.materials[ 0 ].color.setHex( 0xaa0000 );

					} else {

						info.innerHTML = "No intersection";

					}

				}

				camera.position.x = camdist * Math.cos(theta);
				camera.position.z = camdist * Math.sin(theta);
				camera.position.y = camdist / 2 * Math.sin(theta * 2);
				sun.position = camera.position.clone();
				sun.position.normalize();
				theta += 0.005;

				renderer.render( scene, camera );

				stats.update();

			}

			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">
			<input type="checkbox" id="nearest" checked/> Nearest collider only
			<br/>
		</div>
	</body>
</html>