<!DOCTYPE html>
<title>使用threejs创建几何体添加坐标轴材质阴影动画</title>
<script type="text/javascript" src="libs/three.js"></script>
<script type="text/javascript" src="libs/dat.gui.js"></script>
<script type="text/javascript" src="libs/OrbitControls.js"></script>
<style>
body {
margin: 0;
overflow: hidden;
</style>
</head>
<div id="dom"></div>
<script type="text/javascript">
var camera;
var renderer;
function init() {
// 创建一个场景，它将包含我们所有的元素，如物体，相机和灯光。
var scene = new THREE.Scene();
// 创建一个摄像机，它定义了我们正在看的地方
camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.1, 1000);
// 将摄像机对准场景的中心
camera.position.x = 10;
camera.position.y = 50;
camera.position.z = 90;
camera.lookAt(scene.position);
var orbit = new THREE.OrbitControls(camera);
// 创建一个渲染器并设置大小，WebGLRenderer将会使用电脑显卡来渲染场景
renderer = new THREE.WebGLRenderer();
renderer.setClearColor(new THREE.Color(0xEEEEEE));
renderer.setSize(window.innerWidth, window.innerHeight);
// 设置渲染器需要阴影效果
renderer.shadowMapEnabled = true;
// 在屏幕上显示坐标轴
var axes = new THREE.AxisHelper(100);
scene.add(axes);
// 将平面添加到场景中
var plane = createPlaneGeometryBasicMaterial();
scene.add(plane);
// 将立方体添加到场景中
var cube = createBoxGeometryLambertMaterial();
scene.add(cube);
// 将球体添加到场景中
var sphere = createSphereGeometryLambertMaterial();
scene.add(sphere);
// 为阴影添加光源
var spotLight = new THREE.SpotLight(0xffffff);
spotLight.position.set(-40, 60, -10);
// 设置产生阴影的光源
spotLight.castShadow = true;
spotLight.shadowCameraVisible = true;
scene.add(spotLight);
// 将呈现器的输出添加到HTML元素
document.getElementById("dom").appendChild(renderer.domElement);
// 使用GUI调试库
var controls = new function () {
// 设置初始值
this.rotationSpeed = 0.02;
this.bouncingSpeed = 0.03;
this.numberOfObjects = scene.children.length;
// 随机生成一个立方体
this.addCube = function () {
// 将立方体添加到场景中
scene.add(createBoxGeometryLambertMaterialRandom());
// 更新界面中的对象数量
this.numberOfObjects = scene.children.length;
// 移除场景中的对象，移除添加到场景中的最后一个对象
this.removeCube = function () {
// 获取场景中的所有对象
var allChildren = scene.children;
var lastObject = allChildren[allChildren.length - 1];
// 只移除THREE.Mesh对象
if (lastObject instanceof THREE.Mesh && lastObject != plane && lastObject != cube && lastObject != sphere) {
scene.remove(lastObject);
// 更新界面中的对象数量
this.numberOfObjects = scene.children.length;
// 打印场景中的所有对象
this.outputObjects = function () {
console.log(scene.children);
var gui = new dat.GUI();
// 设置两个变量的取值范围
gui.add(controls, 'rotationSpeed', 0, 0.5);
gui.add(controls, 'bouncingSpeed', 0, 0.5);
// 添加事件
gui.add(controls, 'addCube');
gui.add(controls, 'removeCube');
gui.add(controls, 'outputObjects');
// 监听变量
gui.add(controls, 'numberOfObjects').listen();
// 启动动画
renderScene();
// 创建一个随机大小颜色的立方体
function createBoxGeometryLambertMaterialRandom() {
var cubeSize = Math.ceil((Math.random() * 3));
// 创建一个立方体并设置大小
var cubeGeometry = new THREE.BoxGeometry(cubeSize, cubeSize, cubeSize);
// MeshLambertMaterial设置材质
var cubeMaterial = new THREE.MeshLambertMaterial({color: Math.random() * 0xffffff});
var cube = new THREE.Mesh(cubeGeometry, cubeMaterial);
// 设置该物体投射阴影
cube.castShadow = true;
// 设置该立方体的名称
cube.name = "cube-" + scene.children.length;
// 设置立方体位置
cube.position.x = -30 + Math.round((Math.random() * 60));
cube.position.y = Math.round((Math.random() * 5));
cube.position.z = -20 + Math.round((Math.random() * 20));
return cube;
// 创建一个MeshLambertMaterial材质的立方体
function createBoxGeometryLambertMaterial() {
// 创建一个立方体并设置大小
var cubeGeometry = new THREE.BoxGeometry(4, 4, 4);
// MeshLambertMaterial设置材质
var cubeMaterial = new THREE.MeshLambertMaterial({color: 0xff0000});
var cube = new THREE.Mesh(cubeGeometry, cubeMaterial);
// 设置该物体投射阴影
cube.castShadow = true;
// 设置立方体位置
cube.position.x = -4;
cube.position.y = 3;
cube.position.z = 0;
return cube;
// 创建一个基础材质的立方体
function createBoxGeometryBasicMaterial() {
// 创建一个立方体并设置大小
var cubeGeometry = new THREE.BoxGeometry(4, 4, 4);
// MeshBasicMaterial（基础材质不会对光源有反应只会使用指定的颜色渲染）
var cubeMaterial = new THREE.MeshBasicMaterial({
color: 0xff0000,
wireframe: true
var cube = new THREE.Mesh(cubeGeometry, cubeMaterial);
// 设置立方体位置
cube.position.x = -10;
cube.position.y = 3;
cube.position.z = 0;
return cube;
// 创建一个平面
function createPlaneGeometryBasicMaterial() {
// 创建地平面并设置大小
var planeGeometry = new THREE.PlaneGeometry(100, 70);
var planeMaterial = new THREE.MeshBasicMaterial({
color: 0xcccccc
var plane = new THREE.Mesh(planeGeometry, planeMaterial);
// 设置接受阴影
plane.receiveShadow = true;
// 设置平面位置并旋转
plane.rotation.x = -0.5 * Math.PI;
plane.position.x = 0;
plane.position.y = 0;
plane.position.z = 0;
return plane;
// 创建一个球形几何体
function createSphereGeometryLambertMaterial() {
// 创建一个球体
var sphereGeometry = new THREE.SphereGeometry(4, 20, 20);
// var sphereMaterial = new THREE.MeshBasicMaterial({
// color: 0x7777ff,
// wireframe: true
// });
var sphereMaterial = new THREE.MeshLambertMaterial({color: 0xff0000});
var sphere = new THREE.Mesh(sphereGeometry, sphereMaterial);
// 设置该物体投射阴影
sphere.castShadow = true;
// 位置范围
sphere.position.x = 20;
sphere.position.y = 4;
sphere.position.z = 2;
return sphere;
// 动画渲染
var step = 0;
function renderScene() {
// 遍历场景中所有子对象
scene.traverse(function (e) {
if (e instanceof THREE.Mesh && e != sphere && e != plane) {
// 将立方体绕轴旋转
e.rotation.x += controls.rotationSpeed;
e.rotation.y += controls.rotationSpeed;
e.rotation.z += controls.rotationSpeed;
orbit.update();
// 将立方体绕轴旋转
cube.rotation.x += controls.rotationSpeed;
cube.rotation.y += controls.rotationSpeed;
cube.rotation.z += controls.rotationSpeed;
// 将球上下弹起
step += controls.bouncingSpeed;
sphere.position.x = 20 + ( 10 * (Math.cos(step)));
sphere.position.y = 2 + ( 10 * Math.abs(Math.sin(step)));
// 使用requestAnimationFrame函数进行渲染
requestAnimationFrame(renderScene);
renderer.render(scene, camera);
// 渲染的场景
renderer.render(scene, camera);
window.onload = init;
function onResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);
// 监听调整大小事件
window.addEventListener('resize', onResize, false);
</script>
</body>
</html>
