<!DOCTYPE html>

<html>

<head>

    <title>Example 01.04 - Materials, light and animation</title>

    <script type="text/javascript" src="../libs/three.js"></script>

    <script type="text/javascript" src="../libs/jquery-1.9.0.js"></script>

    <script type="text/javascript" src="../libs/stats.js"></script>

    <style>

        body{

            /* set margin to 0 and overflow to hidden, to go fullscreen */

            margin: 0;

            overflow: hidden;

        }

    </style>

</head>

<body>

<div id="Stats-output">

</div>

<!-- Div which will hold the Output -->

<div id="WebGL-output">

</div>

<!-- Javascript code that runs our Three.js examples -->

<script type="text/javascript">

    // once everything is loaded, we run our Three.js stuff.

    $(function () {

        var stats = initStats();

        // create a scene, that will hold all our elements such as objects, cameras and lights.

        var scene = new THREE.Scene();

        // create a camera, which defines where we're looking at.

        var camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.1, 1000);

        // create a render and set the size

        var renderer = new THREE.WebGLRenderer();

        renderer.setClearColorHex(0xEEEEEE, 1.0);

        renderer.setSize(window.innerWidth, window.innerHeight);

        renderer.shadowMapEnabled = true;

        // create the ground plane

        var planeGeometry = new THREE.PlaneGeometry(60,20,1,1);

        var planeMaterial =    new THREE.MeshLambertMaterial({color: 0xffffff});

        var plane = new THREE.Mesh(planeGeometry,planeMaterial);

        plane.receiveShadow  = true;

        // rotate and position the plane

        plane.rotation.x=-0.5*Math.PI;

        plane.position.x=15

        plane.position.y=0

        plane.position.z=0

        // add the plane to the scene

        scene.add(plane);

        // create a cube

        var cubeGeometry = new THREE.CubeGeometry(4,4,4);

        var cubeMaterial = new THREE.MeshLambertMaterial({color: 0xff0000});

        var cube = new THREE.Mesh(cubeGeometry, cubeMaterial);

        cube.castShadow = true;

        // position the cube

        cube.position.x=-4;

        cube.position.y=3;

        cube.position.z=0;

        // add the cube to the scene

        scene.add(cube);

        var sphereGeometry = new THREE.SphereGeometry(4,20,20);

        var sphereMaterial = new THREE.MeshLambertMaterial({color: 0x7777ff});

        var sphere = new THREE.Mesh(sphereGeometry,sphereMaterial);

        // position the sphere

        sphere.position.x=20;

        sphere.position.y=0;

        sphere.position.z=2;

        sphere.castShadow=true;

        // add the sphere to the scene

        scene.add(sphere);

        // position and point the camera to the center of the scene

        camera.position.x = -30;

        camera.position.y = 40;

        camera.position.z = 30;

        camera.lookAt(scene.position);

        // add subtle ambient lighting

        var ambientLight = new THREE.AmbientLight(0x0c0c0c);

        scene.add(ambientLight);

        // add spotlight for the shadows

        var spotLight = new THREE.SpotLight( 0xffffff );

        spotLight.position.set( -40, 60, -10 );

        spotLight.castShadow = true;

        scene.add( spotLight );

        // add the output of the renderer to the html element

        $("#WebGL-output").append(renderer.domElement);

        // call the render function

        var step=0;

        render();

        function render() {

            stats.update();//拓展render()函数

            // rotate the cube around its axes 绕坐标轴转动的红色方块

            cube.rotation.x += 0.02;

            cube.rotation.y += 0.02;

            cube.rotation.z += 0.02;

            // bounce the sphere up and down   球体弹跳

            step+=0.04;//step+=0.04定义了球体弹跳的速度

            sphere.position.x = 20+( 10*(Math.cos(step)));//Math.cos()和Math.sin()函数通过使用step变量帮我们创建了平滑的轨迹

            sphere.position.y = 2 +( 10*Math.abs(Math.sin(step)));

            // render using requestAnimationFrame

            requestAnimationFrame(render);//调用requestAnimationFrame()方法使得动画能持续进行

            renderer.render(scene, camera);//调用renderScene()来启动动画

        }

        function initStats() {

            var stats = new Stats();

            stats.setMode(0); // 0: fps, 1: ms

            // Align top-left

            stats.domElement.style.position = 'absolute';

            stats.domElement.style.left = '0px';

            stats.domElement.style.top = '0px';

            $("#Stats-output").append( stats.domElement );

            return stats;

        }

    });

</script>

</body>

</html>

控制运动

<!DOCTYPE html>

<html>

<head>

    <title>Example 01.05 - Control gui</title>

    <script type="text/javascript" src="../libs/three.js"></script>

    <script type="text/javascript" src="../libs/jquery-1.9.0.js"></script>

    <script type="text/javascript" src="../libs/stats.js"></script><!--渲染出一个小图形来显示来自动画的每秒的帧数（FPS）-->

    <script type="text/javascript" src="../libs/dat.gui.js"></script><!--用户界面组件来修改代码中的参数-->

    <style>

        body{

            /* set margin to 0 and overflow to hidden, to go fullscreen */

            margin: 0;

            overflow: hidden;

        }

    </style>

</head>

<body>

<div id="Stats-output"><!--增加一个<div>元素用来呈现统计画面-->

</div>

<!-- Div which will hold the Output -->

<div id="WebGL-output">

</div>

<!-- Javascript code that runs our Three.js examples -->

<script type="text/javascript">

    // once everything is loaded, we run our Three.js stuff.

    $(function () {//在匿名函数的一开始调用该函数，使场景有了统计的功能

        var stats = initStats();

        // create a scene, that will hold all our elements such as objects, cameras and lights.

        var scene = new THREE.Scene();

        // create a camera, which defines where we're looking at.

        var camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.1, 1000);

        // create a render and set the size

        var renderer = new THREE.WebGLRenderer();

        renderer.setClearColorHex(0xEEEEEE, 1.0);

        renderer.setSize(window.innerWidth, window.innerHeight);

        renderer.shadowMapEnabled = true;

        // create the ground plane

        var planeGeometry = new THREE.PlaneGeometry(60,20,1,1);

        var planeMaterial =    new THREE.MeshLambertMaterial({color: 0xffffff});

        var plane = new THREE.Mesh(planeGeometry,planeMaterial);

        plane.receiveShadow  = true;

        // rotate and position the plane

        plane.rotation.x=-0.5*Math.PI;

        plane.position.x=15

        plane.position.y=0

        plane.position.z=0

        // add the plane to the scene

        scene.add(plane);

        // create a cube

        var cubeGeometry = new THREE.CubeGeometry(4,4,4);

        var cubeMaterial = new THREE.MeshLambertMaterial({color: 0xff0000});

        var cube = new THREE.Mesh(cubeGeometry, cubeMaterial);

        cube.castShadow = true;

        // position the cube

        cube.position.x=-4;

        cube.position.y=3;

        cube.position.z=0;

        // add the cube to the scene

        scene.add(cube);

        var sphereGeometry = new THREE.SphereGeometry(4,20,20);

        var sphereMaterial = new THREE.MeshLambertMaterial({color: 0x7777ff});

        var sphere = new THREE.Mesh(sphereGeometry,sphereMaterial);

        // position the sphere

        sphere.position.x=20;

        sphere.position.y=0;

        sphere.position.z=2;

        sphere.castShadow=true;

        // add the sphere to the scene

        scene.add(sphere);

        // position and point the camera to the center of the scene

        camera.position.x = -30;

        camera.position.y = 40;

        camera.position.z = 30;

        camera.lookAt(scene.position);

        // add subtle ambient lighting

        var ambientLight = new THREE.AmbientLight(0x0c0c0c);

        scene.add(ambientLight);

        // add spotlight for the shadows

        var spotLight = new THREE.SpotLight( 0xffffff );

        spotLight.position.set( -40, 60, -10 );

        spotLight.castShadow = true;

        scene.add( spotLight );

        // add the output of the renderer to the html element

        $("#WebGL-output").append(renderer.domElement);

        // call the render function

        var step=0;

        var controls = new function() {

            this.rotationSpeed = 0.02;//控制立方体的旋转

            this.bouncingSpeed = 0.03;//控制球的弹跳速度

        }

        var gui = new dat.GUI();//当我们通过dat.GUI改变变量的值，它会立即影响到我们创建的物体的旋转和弹跳速度

        gui.add(controls, 'rotationSpeed',0,0.5);//取值范围0-0.5

        gui.add(controls, 'bouncingSpeed',0,0.5);

        render();

        function render() {

            stats.update();//在render函数里调用stats.update()方法

            // rotate the cube around its axes

            cube.rotation.x += controls.rotationSpeed;

            cube.rotation.y += controls.rotationSpeed;

            cube.rotation.z += controls.rotationSpeed;

            // bounce the sphere up and down

            step+=controls.bouncingSpeed;

            sphere.position.x = 20+( 10*(Math.cos(step)));

            sphere.position.y = 2 +( 10*Math.abs(Math.sin(step)));

            // render using requestAnimationFrame

            requestAnimationFrame(render);

            renderer.render(scene, camera);

        }

        function initStats() {//初始化统计对象

            var stats = new Stats();

            stats.setMode(0); // 如果设置为0，监测fps, 设置为1监测渲染时间 ms

            // Align top-left

            stats.domElement.style.position = 'absolute';

            stats.domElement.style.left = '0px';

            stats.domElement.style.top = '0px';

            $("#Stats-output").append( stats.domElement );

            return stats;

        }

    });

</script>

</body>

</html>

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