<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>ceshi</title>
<script type="text/javascript" src=".\build\three.js"></script>
<style>
body
{
margin: 0;
overflow: hidden;
}
</style>
</head>
<body>
<!-- 作为Three.js渲染器输出元素 -->
<div id="WebGL-output">
</div>
<!-- 第一个 Three.js 样例代码 -->
<script type="text/javascript">
var cube = new Array(100);
var camera, scene, renderer;
var id = null;
var fov = 45;
var near = 0.1;
var far = 1000;
init();
function init() {
scene = new THREE.Scene();
camera = new THREE.PerspectiveCamera(fov, window.innerWidth / window.innerHeight, near, far);
camera.position.x = 100;
camera.position.y = 100;
camera.position.z = 100;
camera.lookAt(scene.position);
//创建一个WebGL渲染器并设置其大小
renderer = new THREE.WebGLRenderer();
renderer.setClearColor(new THREE.Color(0xEEEEEE));
renderer.setSize(window.innerWidth, window.innerHeight);
var axes = new THREE.AxisHelper(200);
scene.add(axes);
for (var i = 0; i < 100; i++) {
var geometry = new THREE.BoxGeometry(5, 5, 5);
for (var j = 0; j < geometry.faces.length; j += 2) {
var hex = Math.random() * 0xffffff;
geometry.faces[j].color.setHex(hex);
geometry.faces[j + 1].color.setHex(hex);
}
var material = new THREE.MeshBasicMaterial({ vertexColors: THREE.FaceColors, overdraw: 0.5 });
cube[i] = new THREE.Mesh(geometry, material);
cube[i].position.x = Math.random() * 100 - 50;
cube[i].position.y = Math.random() * 100 - 50;
cube[i].position.z = Math.random() * 100 - 50;
scene.add(cube[i]);
id = setInterval(render, 33);
}
document.addEventListener('mousewheel', mousewheel, false);
}
function render() {
for (var i = 0; i < 100; i++) {
cube[i].position.x += Math.random() - 0.5;
cube[i].position.y += Math.random() - 0.5;
cube[i].position.z += Math.random() - 0.5;
if (Math.abs(cube[i].position.x) > 100)
cube[i].position.x = 0;
if (Math.abs(cube[i].position.y) > 100)
cube[i].position.y = 0;
if (Math.abs(cube[i].position.z) > 100)
cube[i].position.z = 0;
}
renderer.render(scene, camera);
}
function mousewheel(e) {
e.preventDefault();
//e.stopPropagation();
if (e.wheelDelta) { //判断浏览器IE，谷歌滑轮事件
if (e.wheelDelta > 0) { //当滑轮向上滚动时
fov -= (near < fov ? 1 : 0);
}
if (e.wheelDelta < 0) { //当滑轮向下滚动时
fov += (fov < far ? 1 : 0);
}
} else if (e.detail) { //Firefox滑轮事件
if (e.detail > 0) { //当滑轮向上滚动时
fov -= 1;
}
if (e.detail < 0) { //当滑轮向下滚动时
fov += 1;
}
}
camera.fov = fov;
camera.updateProjectionMatrix();
renderer.render(scene, camera);
}
document.getElementById("WebGL-output").appendChild(renderer.domElement);
</script>
</body>
</html>
