|  |  | 
 |  |  | import { FBXLoader } from 'three/examples/jsm/loaders/FBXLoader' | 
 |  |  | import * as Utils from '../../utils' | 
 |  |  |  | 
 |  |  | const help = true; | 
 |  |  | const help = false; | 
 |  |  |  | 
 |  |  | export default class ShelfThree { | 
 |  |  |  | 
 |  |  | 
 |  |  |  | 
 |  |  |     initScene = () => { | 
 |  |  |         const scene = new THREE.Scene(); | 
 |  |  |         // scene.background = new THREE.Color(0xf0f0f0); | 
 |  |  |         // scene.background = new THREE.Color(0x333333); | 
 |  |  |  | 
 |  |  |         // scene.background = new THREE.Color(0xf8f8f8); | 
 |  |  |         scene.background = new THREE.Color(0x7a7a7a); | 
 |  |  |         scene.fog = new THREE.Fog(scene.background, 1, 5000); | 
 |  |  | 
 |  |  |     initControls = () => { | 
 |  |  |         const controls = new OrbitControls(this.camera, this.renderer.domElement); | 
 |  |  |         // controls.enableRotate = false; // 禁用整体旋转功能 | 
 |  |  |         controls.enablePan = true; // 允许平移 | 
 |  |  |         controls.enablePan = false; // 允许平移 | 
 |  |  |         controls.enableDamping = true;   // 开启阻尼 | 
 |  |  |         controls.dampingFactor = 0.08; // 阻尼因子 | 
 |  |  |         controls.enableZoom = true; // 允许缩放 | 
 |  |  |         // controls.minDistance = 1; // 最小缩放距离 | 
 |  |  |         // controls.maxDistance = 30; // 最大缩放距离 | 
 |  |  |         controls.minPolarAngle = 0; // 最小俯仰角度(向下看) | 
 |  |  |         // controls.minPolarAngle = Math.PI / 2.1; | 
 |  |  |         controls.minPolarAngle = Math.PI / 2.1; | 
 |  |  |         controls.maxPolarAngle = Math.PI / 2.1; // 最大俯仰角度(向上看) | 
 |  |  |         controls.rotateSpeed = 0.6; // 视角移动速度减慢 | 
 |  |  |         controls.autoRotate = true; // 自动旋转 | 
 |  |  | 
 |  |  |         } | 
 |  |  |     } | 
 |  |  |  | 
 |  |  |     rePerspective = (maxHeight) => { | 
 |  |  |         const cameraPosScale = 0.7; | 
 |  |  |         this.camera.position.set(-maxHeight * cameraPosScale, maxHeight * cameraPosScale, maxHeight * cameraPosScale); | 
 |  |  |         this.controls.target = new THREE.Vector3(0, maxHeight * 0.53, 0); | 
 |  |  |     } | 
 |  |  |  | 
 |  |  |     destroy = () => { | 
 |  |  |         cancelAnimationFrame(this.animationFrame); | 
 |  |  |         window.removeEventListener('resize', this.resizeHandler); |