设置响应式画布与全屏控制

代码

import * as THREE from 'three'
import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls.js'

const scene = new THREE.Scene();

const camera = new THREE.PerspectiveCamera(
  45,
  window.innerWidth / window.innerHeight,
  0.1,
  1000
)

const renderer = new THREE.WebGLRenderer()
renderer.setSize(window.innerWidth, window.innerHeight)
document.body.appendChild(renderer.domElement)

const geometry = new THREE.BoxGeometry(1, 1, 1)

const material = new THREE.MeshBasicMaterial({
  color: 0x00ff00
})
const parentMaterial = new THREE.MeshBasicMaterial({
  color: 0xff0000
})

let parentCube = new THREE.Mesh(geometry, parentMaterial)
const cube = new THREE.Mesh(geometry, material)
parentCube.add(cube)
parentCube.position.set(-3, 0, 0)

parentCube.rotation.x = Math.PI / 4;

cube.position.set(2, 2, 2)

cube.rotation.x = Math.PI / 4

scene.add(parentCube)

camera.position.z = 5;
camera.position.y = 2;
camera.position.x = 2;
camera.lookAt(0, 0, 0)

const axesHelper = new THREE.AxesHelper(5);
scene.add(axesHelper);

const controls = new OrbitControls(camera, renderer.domElement);
controls.enableDamping = true;
controls.dampingFactor = 0.05;

function animate() {
  requestAnimationFrame(animate)
  controls.update()
  renderer.render(scene, camera)
}

animate()

// 监听窗口变化
window.addEventListener('resize', () => {
  // 重置渲染器宽高比
  renderer.setSize(window.innerWidth, innerHeight)
  // 重置相机宽高比
  camera.aspect = window.innerWidth / window.innerHeight
  // 更新相机投影矩阵
  camera.updateProjectionMatrix()
})

var btn = document.createElement('button')
btn.innerHTML = '点击全屏'
btn.style.position = 'absolute'
btn.style.top = '10px'
btn.style.left = '10px'
btn.style.zIndex = '999'
btn.onclick = function () {
  // 全屏
  document.body.requestFullscreen()
}
document.body.appendChild(btn)

// 退出全屏
var exitBtn = document.createElement('button')
exitBtn.innerHTML = '退出全屏'
exitBtn.style.position = 'absolute'
exitBtn.style.top = '10px'
exitBtn.style.left = '100px'
exitBtn.style.zIndex = '999'
exitBtn.onclick = function () {
  // 退出全屏
  document.exitFullscreen()
}

document.body.appendChild(exitBtn)