效果图：

import * as THREE from "three"
import { OrbitControls } from "three/examples/jsm/controls/OrbitControls"
import { AxesHelper, DirectionalLight, HemisphereLight, SphereBufferGeometry } from "three";
import{MTLLoader} from "three/examples/jsm/loaders/MTLLoader"
import{OBJLoader}from "three/examples/jsm/loaders/OBJLoader"

var renderer = new THREE.WebGLRenderer({ antialias: true });
// renderer.domElement;//是一个canvas 可以从参数传入
document.body.appendChild(renderer.domElement);

renderer.setSize(window.innerWidth, window.innerHeight);//设置画布高宽
renderer.setClearColor(0xffffff);//设置背景清空颜色

window.addEventListener("resize", () => {//窗口大小变化事件
    renderer.setSize(window.innerWidth, window.innerHeight);
    camera.aspect = window.innerWidth / window.innerHeight;
    //设置了aspect  必须更新相机的投影矩阵
    camera.updateProjectionMatrix();
})

var camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.1, 1000);
camera.position.set(0, 0, 50)
var control = new OrbitControls(camera, renderer.domElement);
var scene = new THREE.Scene();
var light = new HemisphereLight(0xffffff, 0x444444);

scene.add(light);
scene.add(new AxesHelper(1000));

update()

function update() {
    console.log('刷新')
    renderer.render(scene, camera);
    requestAnimationFrame(update);//不会卡塞，专门针对图形渲染刷新的方法
}

var objLoader=new OBJLoader();
var mtlLoader=new MTLLoader();
objLoader.load("../assets/models/obj/male02.obj",(obj)=>{
scene.add(obj);
});