请生成一段在vue框架下使用threejs加载mmd模型和对应模型动画的代码例子

以下是一个在 Vue 框架下使用 Three.js 加载 MMD 模型和对应模型动画的代码例子：

<template>
<div ref="container"></div>
</template>

<script>
import * as THREE from 'three';
import { MMDLoader } from 'three/examples/jsm/loaders/MMDLoader.js';
import { MMDAnimationHelper } from 'three/examples/jsm/animation/MMDAnimationHelper.js';

export default {
mounted() {
const container = this.$refs.container;

// 创建场景
const scene = new THREE.Scene();

// 创建相机
const camera = new THREE.PerspectiveCamera(45, container.clientWidth / container.clientHeight, .1, 100);
camera.position.set(, 1, 5);

// 创建渲染器
const renderer = new THREE.WebGLRenderer({ antialias: true });
renderer.setSize(container.clientWidth, container.clientHeight);
container.appendChild(renderer.domElement);

// 创建灯光
const ambientLight = new THREE.AmbientLight(xffffff, .5);
scene.add(ambientLight);

const directionalLight = new THREE.DirectionalLight(xffffff, .5);
directionalLight.position.set(, 1, );
scene.add(directionalLight);

// 加载 MMD 模型
const loader = new MMDLoader();
loader.load('path/to/model.pmx', (mesh) => {
// 创建 MMD 动画帮助器
const animationHelper = new MMDAnimationHelper({ afterglow: 2. });
animationHelper.add(mesh, { animation: mesh.geometry.animation });

// 添加模型到场景中
scene.add(mesh);

// 播放动画
animationHelper.play(mesh.geometry.animation.animations[].name);
});

// 渲染场景
function render() {
requestAnimationFrame(render);
renderer.render(scene, camera);
}
render();
},
};
</script>