vue 写一个圣诞树

### 使用 Vue.js 和 Three.js 创建圣诞树动画 为了实现这一目标，可以利用 `vue` 的组件化特性来管理场景、相机和渲染器的状态，并通过 `Three.js` 来创建三维物体。下面是一个简单的例子说明如何结合两者制作一个基础版本的旋转圣诞树。 #### 安装依赖库 首先，在项目中安装必要的包： ```bash npm install vue three @types/three ``` #### 初始化 Vue 组件并引入 Three.js 接着定义一个新的 Vue 单文件组件用于承载整个应用逻辑： ```html <template> <div id="app"> <!-- Canvas element will be created by Three.js --> <section ref="sceneContainer"></section> </div> </section> </template> <script lang="ts"> import { defineComponent, onMounted } from 'vue'; // Import required modules from three package import * as THREE from 'three'; export default defineComponent({ name: 'App', setup() { let scene; let camera; let renderer; const initScene = () => { // Create the Scene and set the scene size. scene = new THREE.Scene(); // Set some camera attributes. const VIEW_ANGLE = 45, ASPECT = window.innerWidth / (window.innerHeight - 80), NEAR = 0.1, FAR = 10000; // Create a PerspectiveCamera which uses these settings. camera = new THREE.PerspectiveCamera( VIEW_ANGLE, ASPECT, NEAR, FAR ); // Position the camera at z=200 to see everything clearly. camera.position.z = 200; // Create WebGLRenderer with antialiasing enabled. renderer = new THREE.WebGLRenderer({ antialias: true }); // Append Renderer to DOM document.querySelector('#app section').appendChild(renderer.domElement); // Adjust renderer size according to container dimensions. renderer.setSize(window.innerWidth, window.innerHeight - 80); createTree(); animate(); }; function createTree(){ // Define geometry of tree trunk using CylinderGeometry var materialTrunk = new THREE.MeshBasicMaterial( { color: 0x9e7a3b } ); var geometryTrunk = new THREE.CylinderGeometry( 5, 5, 20, 32 ); var meshTrunk = new THREE.Mesh(geometryTrunk,materialTrunk); meshTrunk.position.y=-60; scene.add(meshTrunk); // Define pyramid shape for top part of Christmas Tree var materialTop = new THREE.MeshPhongMaterial( {color: 0x00ff00} ); var geometryTop = new THREE.ConeGeometry( 30, 80, 32 ); var meshTop = new THREE.Mesh(geometryTop,materialTop); meshTop.rotation.x=Math.PI/-2; scene.add(meshTop); } function animate() { requestAnimationFrame(animate); // Rotate objects slightly each frame to give impression they're spinning slowly around their axes. scene.children.forEach((child) => child instanceof THREE.Object3D && child.rotateY(.01)); render(); } function render() { if (!renderer || !camera || !scene) return; renderer.render(scene, camera); } onMounted(() => { initScene(); }); }, }); </script> <style scoped> #app { width: 100%; height: calc(100vh - 80px); } </style> ``` 此代码片段展示了怎样在一个基于 Vue 构建的应用程序里集成 Three.js 并构建基本的圣诞树模型[^1]。注意这里只实现了静态结构；对于更复杂的交互效果或动态变化，则需进一步调整材质属性以及添加灯光等元素。