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demo09.html
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demo09.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>旋转动画</title>
<style>
body {
margin: 0;
}
canvas {
width: 100%;
height: 100%;
}
</style>
</head>
<body>
<script src="js/three.js"></script>
<script type="module">
var scene = new THREE.Scene()
// 立方体
var geometry = new THREE.BoxGeometry(100, 100, 100)
// var geometry = new THREE.SphereGeometry(60, 40, 40)
// 材质
var material = new THREE.MeshLambertMaterial({
color: 0x0000ff
})
var mesh = new THREE.Mesh(geometry, material)
scene.add(mesh) //网格模型添加到场景中
// 点光源
var point = new THREE.PointLight(0xffffff)
point.position.set(400, 200, 300) //点光源位置
scene.add(point) //点光源添加到场景中
// 环境光
var ambient = new THREE.AmbientLight(0x444444)
scene.add(ambient)
// 相机设置
var width = window.innerWidth //窗口宽度
var height = window.innerHeight //窗口高度
var k = width / height //窗口宽高比
var s = 200 //三维场景显示范围控制系数，系数越大，显示的范围越大
// 正射投影相机对象
var camera = new THREE.OrthographicCamera(-s * k, s * k, s, -s, 1, 1000)
// camera.position.z = 100
camera.position.set(200, 200, 200) //设置相机位置
camera.lookAt(scene.position) //设置相机方向(指向的场景对象)
/**
* 创建渲染器对象
*/
var renderer = new THREE.WebGLRenderer()
renderer.setSize(width, height) //设置渲染区域尺寸
renderer.setClearColor(0xb9d3ff, 1) //设置背景颜色
document.body.appendChild(renderer.domElement) //body元素中插入canvas对象
//执行渲染操作 指定场景、相机作为参数
// renderer.render(scene, camera);
function render() {
renderer.render(scene, camera) //执行渲染操作
mesh.rotateY(0.01) //每次绕y轴旋转0.01弧度
requestAnimationFrame(render) //请求再次执行渲染函数render
}
render()
</script>
</body>
</html>