05-THREE.JS 产生大雾的效果

<!DOCTYPE html>

<html>

<head>
    <title></title>
      <script src="https://cdn.bootcss.com/three.js/r67/three.js"></script>
    <script src="https://cdn.bootcss.com/stats.js/r10/Stats.min.js"></script>
    <script type="text/javascript" src="https://cdn.bootcss.com/dat-gui/0.7.3/dat.gui.js"></script>
    <style>
        body {
            margin: 0;
            overflow: hidden;
        }
    </style>
</head>
<body>

<div id="Stats-output">
</div>
<div id="WebGL-output">
</div>
<script type="text/javascript">

    // 初始化
    function init() {

        var stats = initStats();

        // 创建场景
        var scene = new THREE.Scene();
        //场景中添加雾的效果
        scene.fog = new THREE.Fog(0xffffff, 0.015, 100);

        // 创建一个相机
        var camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.1, 1000);

        // 创建一个渲染器
        var renderer = new THREE.WebGLRenderer();

        renderer.setClearColor(new THREE.Color(0xEEEEEE, 1.0));
        renderer.setSize(window.innerWidth, window.innerHeight);
        renderer.shadowMapEnabled = true;

        // 创建地面
        var planeGeometry = new THREE.PlaneGeometry(60, 40, 1, 1);
        var planeMaterial = new THREE.MeshLambertMaterial({color: 0xffffff});
        var plane = new THREE.Mesh(planeGeometry, planeMaterial);
        plane.receiveShadow = true;

        // 让地面水平
        plane.rotation.x = -0.5 * Math.PI;
        plane.position.x = 0;
        plane.position.y = 0;
        plane.position.z = 0;

        // 添加地面到场景中去
        scene.add(plane);

        // 相机对准场景
        camera.position.x = -30;
        camera.position.y = 40;
        camera.position.z = 30;
        camera.lookAt(scene.position);

        // 添加自然光
        var ambientLight = new THREE.AmbientLight(0x0c0c0c);
        scene.add(ambientLight);

        // 添加聚光灯
        var spotLight = new THREE.SpotLight(0xffffff);
        spotLight.position.set(-40, 60, -10);
        spotLight.castShadow = true;
        scene.add(spotLight);

        // 添加到DOM元素中去
        document.getElementById("WebGL-output").appendChild(renderer.domElement);

        var step = 0;

        var controls = new function () {
            this.rotationSpeed = 0.02;
            this.numberOfObjects = scene.children.length;

            this.removeCube = function () {
                var allChildren = scene.children;
                var lastObject = allChildren[allChildren.length - 1];
                if (lastObject instanceof THREE.Mesh) {
                    scene.remove(lastObject);
                    this.numberOfObjects = scene.children.length;
                }
            };

            this.addCube = function () {

                var cubeSize = Math.ceil((Math.random() * 3));
                var cubeGeometry = new THREE.BoxGeometry(cubeSize, cubeSize, cubeSize);
                var cubeMaterial = new THREE.MeshLambertMaterial({color: Math.random() * 0xffffff});
                var cube = new THREE.Mesh(cubeGeometry, cubeMaterial);
                cube.castShadow = true;

                // 在场景中随机位置
                cube.position.x = -30 + Math.round((Math.random() * planeGeometry.parameters.width));
                cube.position.y = Math.round((Math.random() * 5));
                cube.position.z = -20 + Math.round((Math.random() * planeGeometry.parameters.height));

                // 场景中添加物体
                scene.add(cube);
                this.numberOfObjects = scene.children.length;
            };

            this.outputObjects = function () {
                console.log(scene.children);
            }
        };

        var gui = new dat.GUI();
        gui.add(controls, 'rotationSpeed', 0, 0.5);
        gui.add(controls, 'addCube');
        gui.add(controls, 'removeCube');
        gui.add(controls, 'outputObjects');
        gui.add(controls, 'numberOfObjects').listen();

        render();

        function render() {
            stats.update();

            // 旋转场景中所有元素
            scene.traverse(function (e) {
                if (e instanceof THREE.Mesh && e != plane) {

                    e.rotation.x += controls.rotationSpeed;
                    e.rotation.y += controls.rotationSpeed;
                    e.rotation.z += controls.rotationSpeed;
                }
            });

            requestAnimationFrame(render);
            renderer.render(scene, camera);
        }

        function initStats() {

            var stats = new Stats();

            stats.setMode(0); // 0: fps, 1: ms
            stats.domElement.style.position = 'absolute';
            stats.domElement.style.left = '0px';
            stats.domElement.style.top = '0px';

            document.getElementById("Stats-output").appendChild(stats.domElement);

            return stats;
        }
    }
    window.onload = init

</script>
</body>
</html>