前言

宝马汽车产品展示和原理讲解
演示网址：http://f-h-y.gitee.io/bmw-car-display-project/#/

效果图

1、创建基本设置(场景和背景等）

// 获取节点
    const canvasDom = ref('canvasDom')

    // 创建场景
    const scene = new THREE.Scene()
    // 创建相机
    const camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000)
    // 调整相机的位置
    camera.position.set(0, 2, 6);
    // 创建渲染器
    const renderer = new THREE.WebGLRenderer({
      // 抗锯齿
      antialias: true
    })
    // 调整渲染器的大小
    renderer.setSize(window.innerWidth, window.innerHeight)

    // 渲染动画
    const render = () => {
      renderer.render(scene, camera)
      requestAnimationFrame(render)
    }

    onMounted(() => {
      // 把渲染器插入到节点上
      canvasDom.value.appendChild(renderer.domElement)
      // 设置场景默认颜色
      scene.background = new THREE.Color('#ccc')
      scene.environment = new THREE.Color('#ccc')
      // 运行渲染动画
      render()

      // 添加网格地面
      const gridHelper = new THREE.GridHelper(10, 10)
      gridHelper.material.opacity = 0.5
      gridHelper.material.transparent = true
      scene.add(gridHelper)

      // 添加控制器
      const controls = new OrbitControls(camera, renderer.domElement);
      controls.update()
    })

2、加载模型和展厅灯光

加载模型

导入加载模型需要的文件

import { GLTFLoader } from 'three/examples/jsm/loaders/GLTFLoader.js'
import { DRACOLoader } from 'three/examples/jsm/loaders/DRACOLoader.js'

添加模型和需要控制的模型模块

	   //设置材质
	    const bodyMaterial4 = new THREE.MeshPhysicalMaterial({
	      color: 0x80007f,
	      metalness: 1,
	      roughness: 0.5,
	      clearcoat: 1,
	      clearcoatRoughness: 0,
	    })
		// 添加gltf汽车模型
	  let bodyOfCar,hub,frame,Tail,FrontWindshield
      const loader = new GLTFLoader()
      const dracoLoader = new DRACOLoader()
      // 添加解压文件
      dracoLoader.setDecoderPath('./draco/gltf/')
      loader.setDRACOLoader(dracoLoader)
      loader.load('./model/scene.gltf', (gltf) => {
        const bmv = gltf.scene;
        bmv.traverse((child) => {
          if (child.isMesh && child.name.includes('Object_4')) {
            frame = child
            //将材质设置到固定的模块
            frame.material = bodyMaterial2
            data.eleList.push(frame)
          }
          if (child.isMesh && child.name.includes('Object_6')) {
            bodyOfCar = child
            bodyOfCar.material = bodyMaterial3
            data.eleList.push(bodyOfCar)
          }

          if (child.isMesh && child.name.includes('Object_20')) {
            hub = child
            hub.material = bodyMaterial4
            data.eleList.push(hub)
          }
          if (child.isMesh && child.name.includes('Object_21')) {
            Tail = child
            Tail.material = bodyMaterial
            data.eleList.push(Tail)
          }

          if (child.isMesh && child.name.includes('Object_23')) {
            FrontWindshield = child
          }

        })
        bmv.position.set(0, 0, 0)
        scene.add(bmv)
      })

添加灯光

	  // 添加灯光
      const light1 = new THREE.DirectionalLight(0xffffff, 1)
      light1.position.set(0, 0, 10)
      scene.add(light1)
      const light2 = new THREE.DirectionalLight(0xffffff, 1)
      light2.position.set(0, 0, -10)
      scene.add(light2)
      const light3 = new THREE.DirectionalLight(0xffffff, 1)
      light3.position.set(10, 0, 0)
      scene.add(light3)
      const light4 = new THREE.DirectionalLight(0xffffff, 1)
      light1.position.set(-10, 0, 0)
      scene.add(light4)
      const light5 = new THREE.DirectionalLight(0xffffff, 1)
      light1.position.set(0, 10, 0)
      scene.add(light5)
      const light6 = new THREE.DirectionalLight(0xffffff, 1)
      light1.position.set(5, 10, 0)
      scene.add(light6)
      const light7 = new THREE.DirectionalLight(0xffffff, 1)
      light1.position.set(0, 10, 5)
      scene.add(light7)
      const light8 = new THREE.DirectionalLight(0xffffff, 1)
      light1.position.set(0, 10, -5)
      scene.add(light8)
      const light9 = new THREE.DirectionalLight(0xffffff, 1)
      light1.position.set(-5, 10, 0)
      scene.add(light9)

3、添加点击事件

// 点击调整颜色
    let selectColor = (index, item1) => {
      if (data.nameList.includes(item1)) {
        let materIndex = data.nameList.indexOf(item1)
        data.eleList[materIndex].material.color.set(data.colorList[index].color)
      }
    }

    // 点击改变材质的磨砂程度
    let selectMaterial = (index) => {
      bodyMaterial3.clearcoatRoughness = data.materials[index].value
    }

    // 点击设置前挡风玻璃是否透明
    let selectOOpacity = (index) => {
      FrontWindshield.material.opacity=data.OpacityList[index].value
      FrontWindshield.material.transparent=true
    }