javascript
/
three.js
spiegel van https://github.com/tazdij/three.js.git


			
				
					
						
						
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							<html>
    <head>
        <title>three.js webgl - intersection: ray with sphere/AABB/plane</title>
        <meta http-equiv="content-type" content="text/html; charset=utf-8">
        <style type="text/css">

            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 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 scene, camera, renderer, info, mouse2d, 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);
                mouse2d = new THREE.Vector3(0, 0, 1);

                scene = new THREE.Scene();

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

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

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

                //makeWall(480);
                //makeWall(360);
                makeWall(240);
                makeWall(120);
                makeWall(0);
                makeWall(-120);
                makeWall(-240);
                //makeWall(-360);
                //makeWall(-480);

                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.addObject( 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.addObject(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.addObject(sphere);
                geoms.push(sphere);

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

            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);

                var r = new THREE.Ray();
                r.origin = mouse2d.clone();
                var matrix = camera.matrixWorld.clone();
                matrix.multiplySelf(THREE.Matrix4.makeInvert(camera.projectionMatrix));
                matrix.multiplyVector3(r.origin);
                r.direction = r.origin.clone().subSelf(camera.position);

                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( r );
                    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( r );
                    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>