javascript - 回転しながら粒子をカメラに向けて、3つのjsで交差するときにメッセージを警告しようとしていますか？

Question

パーティクルにイベントハンドラーを作成し、球体にアラートメッセージを表示し、常にカメラを狙っています。このデモに似たもの（そしてIE 9以降で動作するようにする）

これが私のコードです 。http：//jsfiddle.net/praveenv29/cVnKV/11/

var renderer, projector;
var mouseX, mouseY, stats, container;
var objects = [];
var INTERSECTED;

var camera, scene, renderer, material, mesh, cont;

var w1 = 960;
var h1 = 700;

var halfWidth = w1 / 2;
var halfHeigth = h1 / 2;

function init() {
    cont = document.createElement('div');
    cont.id = "cont";
    document.body.appendChild(cont);

    camera = new THREE.PerspectiveCamera(75, w1 / h1, 1, 10000);
    camera.position.set(90, 90, -200);


    scene = new THREE.Scene();
    scene.add(camera);

    controls = new THREE.OrbitControls(camera);

    controls = new THREE.TrackballControls(camera, cont);
    controls.rotateSpeed = 0.8;
    controls.zoomSpeed = 1.2;
    controls.panSpeed = 2.5;
    controls.noZoom = true;
    controls.noPan = true;
    controls.staticMoving = false;

    controls.target.set(0, 0, 0);
    controls.keys = [95, 90, 84];

    renderer = new THREE.CanvasRenderer();


    material = new THREE.MeshBasicMaterial({
        color: 0x000000,
        wireframe: true
    });
    renderer.setSize(w1, h1);
    cont.appendChild(renderer.domElement);
    generateGeometry();

    var light = new THREE.PointLight(0xffffff);
    light.position.set(10, 0, 0);
    scene.add(light);

}

function animate() {
    requestAnimationFrame(animate);
    render();
}

function render() {
    controls.update();
    renderer.render(scene, camera);
}

function generateGeometry() {

    var axis = new THREE.AxisHelper();
    scene.add(axis);

    for (var i = 0; i < 20; i++) {

        var gloom = new THREE.ImageUtils.loadTexture('map_pin.png');
        materialr = new THREE.MeshBasicMaterial({
            map: gloom,
            overdraw: true,
            side: THREE.DoubleSide
        });
        var geometry = new THREE.PlaneGeometry(15, 15, 2, 2);

        var cube = new THREE.Mesh(geometry, materialr);
        cube.position.x = Math.random() * 2 - 1;
        cube.position.y = Math.random() * 2 - 1;
        cube.position.z = Math.random() * 2 - 1;
        cube.position.normalize();
        cube.position.multiplyScalar(125);

        cube.rotation.x = cube.position.x / Math.PI; //57.38

        cube.rotation.y = 360 / Math.PI * 2;

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

    }

    //earth
    var texture = THREE.ImageUtils.loadTexture('world.jpg');
    var materials = new THREE.MeshBasicMaterial({
        map: texture,
        overdraw: true
    });

    var cone = new THREE.SphereGeometry(120, 35, 35);

    var coneMesh = new THREE.Mesh(cone, material);

    coneMesh.position.y = 0;
    coneMesh.rotation.set(0, 0, 0);

    scene.add(coneMesh);


}

init();
animate();