听说说会了这个能把其他前端都卷跑
查看three.js官方文档
https://threejs.org/docs/index.html#manual/zh/introduction/Installation
懒人下载模型
https://sketchfab.com/
简单的立方体
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<title>My first three.js app</title>
<style>
body {
margin: 0;
}
</style>
<script type="importmap">
{
"imports": {
"three": "https://unpkg.com/three@0.158.0/build/three.module.js",
"three/addons/": "https://unpkg.com/three@0.158.0/examples/jsm/"
}
}
</script>
<!-- 不要忘记将上述链接中的 <version> 替换为 three.js 的实际版本，如 "v0.158.0"。最新版本可在 npm 版本列表中找到。 -->
<!-- https://www.npmjs.com/package/three?activeTab=versions -->
</head>
<body>
<script type="module">
import * as THREE from "three";
import { OrbitControls } from "three/addons/controls/OrbitControls.js";
//场景
const scene = new THREE.Scene();
scene.background = null;
//相机
const camera = new THREE.PerspectiveCamera( //PerspectiveCamera透视摄像机
75, //第一个参数是视野角度（FOV）
window.innerWidth / window.innerHeight, //长宽比（aspect ratio）
0.1, //近截面（near）
1000 //远截面（far）当物体某些部分比摄像机的远截面远或者比近截面近的时候，该这些部分将不会被渲染到场景中。
);
//渲染器
const renderer = new THREE.WebGLRenderer({
alpha: true,
});
renderer.setSize(window.innerWidth, window.innerHeight); //渲染区域的宽高
document.body.appendChild(renderer.domElement); //将 renderer（渲染器）的dom元素（renderer.domElement）添加到我们的 HTML 文档中
//轨道控制器(鼠标放大、缩小、移动)
const controls = new OrbitControls(camera, renderer.domElement);
camera.position.set(0, 2, 2);
controls.update();
//光源
const light = new THREE.AmbientLight(0xffffff); // AmbientLight基本光源
scene.add(light);
//创建一个立方体
const geometry = new THREE.BoxGeometry(1, 1, 1);
//MeshBasicMaterial基本材质
const material = new THREE.MeshBasicMaterial({ color: 0x00ff00 });
//网格包含一个几何体以及作用在此几何体上的材质，我们可以直接将网格对象放入到我们的场景中，并让它在场景中自由移动。
const cube = new THREE.Mesh(geometry, material);
//add的时候，物体将会被添加到 (0,0,0) 坐标，可能使得摄像机和立方体彼此在一起
scene.add(cube);
//渲染场景
function animate() {
requestAnimationFrame(animate); //requestAnimationFrame当用户切换到其它的标签页时，它会暂停
cube.rotation.x += 0.01;
cube.rotation.y += 0.01;
renderer.render(scene, camera);
}
animate();
</script>
</body>
</html>
导入sketchfab模型
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<title>小恐龙</title>
<style>
body {
margin: 0;
}
</style>
<script type="importmap">
{
"imports": {
"three": "https://unpkg.com/three@0.158.0/build/three.module.js",
"three/addons/": "https://unpkg.com/three@0.158.0/examples/jsm/"
}
}
</script>
</head>
<body>
<script type="module">
import * as THREE from "three";
import { GLTFLoader } from "three/addons/loaders/GLTFLoader.js";
import { OrbitControls } from "three/addons/controls/OrbitControls.js";
const scene = new THREE.Scene();
scene.background = null;
const camera = new THREE.PerspectiveCamera(
75,
window.innerWidth / window.innerHeight,
0.01,
1000
);
const renderer = new THREE.WebGLRenderer({
alpha: true,
});
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);
const controls = new OrbitControls(camera, renderer.domElement);
camera.position.set(0.2, 0.2, 0.2);
controls.update();
const loader = new GLTFLoader();
loader.load(
"baby_dragon/scene.gltf",
function (gltf) {
scene.add(gltf.scene);
gltf.scene.traverse(function (child) {
if (child.isMesh) {
child.frustumCulled = false;
//模型阴影
child.castShadow = true;
//模型自发光
child.material.emissive = child.material.color;
child.material.emissiveMap = child.material.map;
}
});
},
function (xhr) {
console.log((xhr.loaded / xhr.total) * 100 + "% loaded");
},
function (error) {
console.log("An error happened");
console.log(error);
}
);
function animate() {
requestAnimationFrame(animate);
renderer.render(scene, camera);
}
animate();
</script>
</body>
</html>
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