vue3中使用three.js记录

记录一下three.js配合vite+vue3的使用。

安装three.js

使用npm安装：

npm install --save three

开始使用

1.定义一个div

<template>
  <div ref="threeContainer" class="w-full h-full"></div>
</template>

可以给这个div定义一个ref，之后会使用ref获取该页面的宽和高以及插入canvas，或者直接插入document.body。这里有一个前提，这个div需要被定义确定的宽和高，例如style="width:100vw;height:100vh"

2.定义script

引入threejs以及可能会用到的组件

import * as THREE from 'three';
import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls.js';
import { GLTFLoader } from 'three/examples/jsm/loaders/GLTFLoader.js';
import { DRACOLoader } from 'three/examples/jsm/loaders/DRACOLoader.js';
import { RGBELoader } from 'three/examples/jsm/loaders/RGBELoader.js';
import { Water } from 'three/examples/jsm/objects/Water2.js';
import gsap from 'gsap';

定义一些常用的变量以及初始化方法

let scene: any, camera: any, renderer: any, controls: any, dracoLoader: any, gltfLoader: any, starsInstance: any;
onUnmounted(() => {
  // 退出时清理资源
  if (renderer) renderer.dispose();
});
const initThree = () => {
  // 初始化场景
  scene = new THREE.Scene();
  // 初始化相机
  camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000);
  camera.position.set(-3.23, 2.98, 4.06);
  camera.updateProjectionMatrix();
  // 初始化渲染器
  renderer = new THREE.WebGLRenderer({
    // 设置抗锯齿
    antialias: true
  });
  renderer.setSize(window.innerWidth, window.innerHeight);
  // 渲染完成后插入body
  document.body.appendChild(renderer.domElement);
  // 设置色调映射
  renderer.outputEncoding = THREE.sRGBEncoding;
  renderer.toneMapping = THREE.ACESFilmicToneMapping;
  renderer.toneMappingExposure = 0.5;
  renderer.shadowMap.enabled = true;
  renderer.physicallyCorrectLights = true;
  // 初始化控制器
  controls = new OrbitControls(camera, renderer.domElement);
  controls.target.set(-8, 2, 0);
  controls.enableDamping = true;
  // 初始化loader以及设置压缩模型的解压缩地址
  dracoLoader = new DRACOLoader();
  dracoLoader.setDecoderPath('./draco/');
  gltfLoader = new GLTFLoader();
  gltfLoader.setDRACOLoader(dracoLoader);
  // 加载环境纹理，天空鱼眼图片
  const rgbeLoader = new RGBELoader();
  rgbeLoader.load('./textures/sky.hdr', (texture) => {
    texture.mapping = THREE.EquirectangularReflectionMapping;
    scene.background = texture;
    scene.environment = texture;
  });
  // 加载模型
  gltfLoader.load('./model/scene.glb', (gltf: any) => {
    const model = gltf.scene;
    model.traverse((child: any) => {
      if (child.name === 'Plane') {
        child.visible = false;
      }
      if (child.isMesh) {
        child.castShadow = true;
        child.receiveShadow = true;
      }
    });
    scene.add(model);
  });
  // 设置灯光
  initLight();
};
const initLight = () => {
  // 添加平行光
  const light = new THREE.DirectionalLight(0xffffff, 1);
  light.position.set(0, 50, 0);
  scene.add(light);
};
const render = () => {
  requestAnimationFrame(render);
  renderer.render(scene, camera);
  controls.update();
};
initThree();
render();
// 监听鼠标事件
window.addEventListener(
  'click',
  (e) => {
    if (isAnimate) return;
    isAnimate = true;
    index.value++;
    if (index.value > scenes.length - 1) {
      index.value = 0;
      restoreHeart();
    }
    scenes[index.value].callback();
    setTimeout(() => {
      isAnimate = false;
    }, 1000);
  },
  false
);