vue+three.js实现炫酷的3D登陆页面示例详解【vue入门】

目录

• 前言：
• Three.js的基础知识
• 关于场景
• 关于光源
• 关于相机（重要）
• 关于渲染器
• 完善效果
• 创建一个左上角的地球
• 使地球自转
• 创建星星
• 使星星运动
• 创建云以及运动轨迹
• 使云运动
• 完成three.js有关效果
• 结语

const scene = new THREE.Scene()
// 在场景中添加雾的效果，Fog参数分别代表‘雾的颜色"、‘开始雾化的视线距离"、刚好雾化至看不见的视线距离"
scene.fog = new THREE.Fog(0x000000, 0, 10000)
// 盒模型的深度
const depth = 1400
// 在场景中添加一个圆球盒模型
// 1.创建一个立方体
const geometry = new THREE.BoxGeometry(1000, 800, depth)
// 2.加载纹理
const texture = new THREE.TextureLoader().load("bg.png")
// 3.创建网格材质（原料）
const material = new THREE.MeshBasicMaterial({map: texture, side: THREE.BackSide})
// 4.生成网格
const mesh = new THREE.Mesh(geometry, material)
// 5.把网格放入场景中
scene.add(mesh)

// 1.创建环境光
const ambientLight = new THREE.AmbientLight(0xffffff, 1)
// 2.创建点光源，位于场景右下角
const light_rightBottom = new THREE.PointLight(0x0655fd, 5, 0)
light_rightBottom.position.set(0, 100, -200)
// 3.把光源放入场景中
scene.add(light_rightBottom)
scene.add(ambientLight)

/**
 * 为了避免边缘变形，这里将fov角度设置小一些，距离拉远一些
 * 固定视域角度，求需要多少距离才能满足完整的视野画面
 * 15度等于(Math.PI / 12)
 */
const cOntainer= document.getElementById("login-three-container")
const width = container.clientWidth
const height = container.clientHeight
const fov = 15
const distance = width / 2 / Math.tan(Math.PI / 12)
const zAxisNumber = Math.floor(distance - depth / 2)
const camera = new THREE.PerspectiveCamera(fov, width / height, 1, 30000)
camera.position.set(0, 0, zAxisNumber)
const cameraTarget = new THREE.Vector3(0, 0, 0)
camera.lookAt(cameraTarget)

// 获取容器dom
const cOntainer= document.getElementById("login-three-container")
// 创建webgl渲染器实例
const renderer = new THREE.WebGLRenderer({ antialias: true, alpha: true })
// 设置渲染器画布的大小
renderer.setSize(width, height)
// 把画布实例（canvas）放入容器中
container.appendChild(renderer.domElement)
// 渲染器渲染场景
renderer.render(scene, camera)

//动画刷新
const loopAnimate = () => {
    requestAnimationFrame(loopAnimate)
    scene.rotateY(0.001)
    renderer.render(scene, camera)
}
loopAnimate()

// 加载纹理
const texture = THREE.TextureLoader().load("earth_bg.png")
// 创建网格材质
const material = new THREE.MeshPhongMaterial({map: texture, blendDstAlpha: 1})
// 创建几何球体
const sphereGeometry = new THREE.SphereGeometry(50, 64, 32)
// 生成网格
const sphere = new THREE.Mesh(sphereGeometry, material)
// 为了单独操作球体的运动效果，我们把球体放到一个组中
const Sphere_Group = new THREE.Group()
const Sphere_Group.add(sphere)
// 设置该组（球体）在空间坐标中的位置
const Sphere_Group.position.x = -400
const Sphere_Group.position.y = 200
const Sphere_Group.position.z = -200
// 加入场景
scene.add(Sphere_Group)
// 使球能够自转，需要在loopAnimate中加上
Sphere_Group.rotateY(0.001)

// 渲染星球的自转
const renderSphereRotate = () => {
    if (sphere) {
      Sphere_Group.rotateY(0.001)
    }
}
// 使球能够自转，需要在loopAnimate中加上
const loopAnimate = () => {
    requestAnimationFrame(loopAnimate)
    renderSphereRotate()
    renderer.render(scene, camera)
}

// 初始化星星
const initSceneStar = (initZposition: number): any => {
    const geometry = new THREE.BufferGeometry()
    const vertices: number[] = []
    const pointsGeometry: any[] = []
    const textureLoader = new THREE.TextureLoader()
    const sprite1 = textureLoader.load("starflake1.png")
    const sprite2 = textureLoader.load("starflake2.png")
    parameters = [
      [[0.6, 100, 0.75], sprite1, 50],
      [[0, 0, 1], sprite2, 20]
    ]
    // 初始化500个节点
    for (let i = 0; i <500; i++) {
      /**
       * const x: number = Math.random() * 2 * width - width
       * 等价
       * THREE.MathUtils.randFloatSpread(width)
       * _.random使用的是lodash库中的生成随机数
       */
      const x: number = THREE.MathUtils.randFloatSpread(width)
      const y: number = _.random(0, height / 2)
      const z: number = _.random(-depth / 2, zAxisNumber)
      vertices.push(x, y, z)
    }
    geometry.setAttribute("position", new THREE.Float32BufferAttribute(vertices, 3))
    // 创建2种不同的材质的节点（500 * 2）
    for (let i = 0; i 

// 渲染星星的运动
const renderStarMove = () => {
    const time = Date.now() * 0.00005
    zprogress += 1
    zprogress_second += 1
    if (zprogress >= zAxisNumber + depth / 2) {
      zprogress = particles_init_position
    } else {
      particles_first.forEach((item) => {
        item.position.setZ(zprogress)
      })
    }
    if (zprogress_second >= zAxisNumber + depth / 2) {
      zprogress_secOnd= particles_init_position
    } else {
      particles_second.forEach((item) => {
        item.position.setZ(zprogress_second)
      })
    }
    for (let i = 0; i 

// 创建曲线路径
const route = [
    new THREE.Vector3(-width / 10, 0, -depth / 2),
    new THREE.Vector3(-width / 4, height / 8, 0),
    new THREE.Vector3(-width / 4, 0, zAxisNumber)
]
const curve = new THREE.CatmullRomCurve3(route, false)
const tubeGeometry = new THREE.TubeGeometry(curve, 100, 2, 50, false)
const tubeMaterial = new THREE.MeshBasicMaterial({
  opacity: 0,
  transparent: true
})
const tube = new THREE.Mesh(tubeGeometry, tubeMaterial)
// 把创建好的路径加入场景中
scene.add(tube)
// 创建平面几何
const clOndGeometry= new THREE.PlaneGeometry(500, 200)
const textureLoader = new THREE.TextureLoader()
const cloudTexture = textureLoader.load("cloud.png")
const clOndMaterial= new THREE.MeshBasicMaterial({
  map: cloudTexture,
  blending: THREE.AdditiveBlending,
  depthTest: false,
  transparent: true
})
const cloud = new THREE.Mesh(clondGeometry, clondMaterial)
// 将云加入场景中
scene.add(cloud)

let cloudProgress = 0
let scaleSpeed = 0.0006
let maxScale = 1
let startScale = 0
// 初始化云的运动函数
const cloudMove = () => {
  if (startScale  1) {
    cloudProgress = 0
    startScale = 0
  } else {
    cloudProgress += speed
    if (cloudParameter.curve) {
      const point = curve.getPoint(cloudProgress)
      if (point && point.x) {
        cloud.position.set(point.x, point.y, point.z)
      }
    }
  }
}