potree-sdk/src/custom/viewer/ViewerNew.js

 

import * as GaussianSplats3D from "../../../libs/gaussian/gaussian-splats-3d.module.js";

import {Loader3DTiles} from '../../../libs/three.js/3dtiles/three-loader-3dtiles.esm.js'; 
import {OBJLoader} from "../../../libs/three.js/loaders/OBJLoader.js";
import {MTLLoader} from "../../../libs/three.js/loaders/MTLLoader.js";
import {GLTFLoader} from  "../../../libs/three.js/loaders/GLTFLoader.js"; 
import {PLYLoader} from "../../../libs/three.js/loaders/PLYLoader.js";
//--------以上文件只在部分工程中添加-------------------------

import * as THREE from "../../../libs/three.js/build/three.module.js";
import Stats from "../../../libs/stats.js/stats.js";

import {ClipTask, ClipMethod, CameraMode, LengthUnits, ElevationGradientRepeat} from "../../defines.js";
import {TagTool} from "../objects/tool/TagTool.js"; 
import Compass from "../objects/tool/Compass.js";
import {FloorCompass} from "../objects/tool/FloorCompass.js";
import AxisViewer from "../objects/tool/AxisViewer.js";
 
    

import {ExtendScene} from '../../viewer/ExtendScene.js' 
import {transitions, easing, lerp} from '../utils/transitions.js' 
import {Renderer} from "../../PotreeRendererNew.js"; 
//import {PotreeRenderer} from "../viewer/PotreeRenderer.js";
import {EDLRenderer} from "../../viewer/EDLRendererNew.js";
import {HQSplatRenderer} from "../../viewer/HQSplatRenderer.js";
import {MapViewer} from "./map/MapViewer.js";
                                                                 
import {NavigationCube} from '../../viewer/NavigationCube.js'
   
//import {MapView} from "../viewer/map.js"; 
import {ProfileWindow, ProfileWindowController} from "../../viewer/profile.js";

import {Features} from "../../Features.js";
import {Message} from "../../utils/Message.js";
import {Sidebar} from "../../viewer/sidebarNew.js";

import {AnnotationTool} from "../../utils/AnnotationTool.js";
import {MeasuringTool} from "../objects/tool/MeasuringTool.js"; 
import CursorDeal from '../utils/CursorDeal.js'
import Common from '../utils/Common.js' 
import browser from '../utils/browser.js'
import SplitScreen from '../utils/SplitScreen.js'
import cameraLight from "../utils/cameraLight.js";
import math from "../utils/math.js";
import {MeshDraw}  from '../utils/DrawUtil.js'
import {UoMService}  from '../utils/UnitConvert.js'
import {ClippingTool} from "../../utils/ClippingTool.js";
import {TransformationTool} from "../../utils/TransformationToolNew.js"; 
import {Utils} from "../../utils.js";
import {BoxVolume} from "../../utils/VolumeNew.js";
import {VolumeTool} from "../../utils/VolumeTool.js";
import {Images360} from "../modules/panos/Images360.js";
import {Clip} from '../modules/clipModel/Clip.js'
import {Alignment} from "../modules/datasetAlignment/Alignment.js";
import {SiteModel} from "../modules/siteModel/SiteModel.js";
import MergeEditor from "../modules/mergeModel/MergeEditor.js";
import {RouteGuider}  from '../modules/route/RouteGuider.js'
import {Clipping}  from '../modules/clipping/Clipping.js'



import ParticleEditor from '../modules/Particles/ParticleEditor.js'
import CamAniEditor from '../modules/CameraAnimation/CamAniEditor.js'  
import PanoEditor  from '../modules/panoEdit/panoEditor.js' 
import VolumeComputer from '../modules/VolumeCompute/VolumeComputer.js' 
 

import {InputHandler} from "../../navigation/InputHandlerNew.js";

import Magnifier from "../objects/Magnifier.js";
import Reticule from "../objects/Reticule.js";
import Viewport from "../viewer/Viewport.js"
import {ViewerBase} from "../viewer/viewerBase.js"


    
   
import SSAARenderPass from "../materials/postprocessing/SSAARenderPass.js"
import EffectComposer from '../materials/postprocessing/EffectComposer.js'
import {ShaderPass} from '../materials/postprocessing/ShaderPass.js'
import RenderPass from '../materials/postprocessing/RenderPass.js'
import FXAAShader from "../materials/postprocessing/FXAAShader.js"
import OutlinePass from "../materials/postprocessing/OutlinePass.js"
import BasicMaterial from '../materials/BasicMaterial.js'  
    
        
        
//import {RoomEnvironment} from './RoomEnvironment.js'
import {FirstPersonControls} from "../../navigation/FirstPersonControlsNew.js";
import {OrbitControls} from "../../navigation/OrbitControlsNew.js";
//import {VRControls} from "../../navigation/VRControlsNew.js";
 

import { ClassificationScheme } from "../../materials/ClassificationScheme.js";
import { VRButton } from '../../../libs/three.js/extra/VRButton.js';
import DxfLoader from '../../loader/DxfLoader.js'
 
import {Splat} from '../objects/3dgs/Splat.js'
 




let loaders = {}

let mapArea; 
let shelterHistory = [] 


Potree.isIframeChild = window.parent!=window  //子页面
/* if(Potree.isIframeChild){ 
    let rootWin = Common.getRootWindow() 
    rootWin && rootWin.viewer.dispatchEvent({type:'createIframe', window}) //给祖先页面发送信息,得不到可能跨域了或无viewer
}  */
/* window.addEventListener('focus',()=>{
    console.log('focus',window.winIndex)
})
window.addEventListener('blur',()=>{
    console.log('blur',window.winIndex)
}) */
THREE.Cache.enabled = true //这样不会重复网络请求相同的图（如热点换图）。
 

export class Viewer extends ViewerBase{
	
	constructor(domElement, mapArea_, args = {}){
		super(domElement, $.extend(args,{name:'mainViewer', antialias:true, preserveDrawingBuffer:true}));
        //注：viewer因为要分屏，尤其是四屏，preserveDrawingBuffer需要为true, 否则无法局部clear 
        
        window.viewer = this
        mapArea = mapArea_                 
        
        this.setLoaders()
        
          
        
        if(this.renderer.capabilities.isWebGL2){
            Potree.settings.isWebgl2 = true  //是否启用webgl2
        } 
         
         
        if(Potree.settings.editType == "pano" || Potree.settings.editType == "merge"){
            this.modules = { 
                Alignment,  
                SiteModel,
                volumeComputer: new VolumeComputer //暂时
            }
            
            
            if(Potree.settings.editType == "pano" ){
                this.modules.PanoEditor = PanoEditor 
            }else if(Potree.settings.editType == "merge"){
                this.modules.MergeEditor = MergeEditor 
                this.modules.CamAniEditor = CamAniEditor
                Potree.settings.useDepthTex = Potree.settings.mergeType2
            }
            
        }else{
            this.modules = { 
                Clip,
                Alignment,
                SiteModel,
                RouteGuider : new RouteGuider,
                clipping: new Clipping,
                ParticleEditor,
                CamAniEditor, 
                volumeComputer: new VolumeComputer,
                MergeEditor 
            }
        }
        {
            Potree.timeCollect = {
                //median预置一个中等值，以防止cpu过低的设备首次卡顿  
                //depthSampler : {minCount:400, median: 1}, //旧的 实时从图片中获取色值的用时，但是现在直接从data中取
                 depthSamChangeImg:{minCount:200, median: 25}, //换图的用时。 需要一开始就start
                 sortByScore:{minCount:Infinity }, 
                 //loop :{minCount:Infinity }
            }
            for(let i in Potree.timeCollect){
                Potree.timeCollect[i].measures = [];
                Potree.timeCollect[i].sum = 0; 
            }
            setTimeout(()=>{
                for(let i in Potree.timeCollect){ 
                    Potree.timeCollect[i].start = true
                }
                /* setTimeout(()=>{
                    console.log('timeCollect', Potree.timeCollect.depthSampler.median, Potree.timeCollect.depthSampler.ave, Potree.timeCollect.depthSampler.measures.length)
                },10000) */
            },2000)
            
             
            
            {
                this.fpsCollect = {} 
                let init = (name)=>{ 
                    this.fpsCollect[name] = [] 
                    this.fpsCollect[name].durSum = 0   
                }
                init('short')
                init('long')
                init('rendered')
                init('renderedLong') 
                init('camChanged')
                init('camChangedLong')
                Potree.fps = 40  //随便写一个
                Potree.fps2 = 40  //随便写一个
                Potree.fpsRendered = 35  //随便写一个
                Potree.fpsRendered2 = 35  //随便写一个
                Potree.fpsCamChanged = 30  //随便写一个
                Potree.fpsCamChanged2 = 30  //随便写一个
                //this.pageHiddenCollect = []
            } 
            
            /* setTimeout(()=>{ 
                console.log('depthSamChangeImg',Potree.timeCollect.depthSamChangeImg.median,  'sortByScore',Potree.timeCollect.sortByScore.median)
                console.log('fps',Potree.fps, Potree.fps2,Potree.fpsRendered )
                
            },25000) */
        }
         
  
        this.memoryModelCountInfo = {tilePosCount:0,tileTexArea:0,otherPosCount:0,otherTexArea:0}
        this.navigateMode = 'free' // 'panorama'； 'free'自由模式是只显示点云或者未进入到漫游点， 
        this.isEdit = true
        this.waitQueue = []  
        this.unitConvert = new UoMService();
        
        this.visible = true
        this.fpVisiDatasets = []
        this.atDatasets = []
        this.objs = new THREE.Object3D, 
        this.objs.name = 'objs'
        this.objs.addEventListener('isVisible',()=>{
            this.setAllTilesets(model=> model.visiChangeCallback() ) 
        })
        
        
        this.testMaxNodeCount = 0
        this.tiles3dVisiVCount = 0
        //this.lastPos = new THREE.Vector3(Infinity,Infinity,Infinity) 
		//-------------
        
        var supportExtFragDepth = !!Potree.Features.EXT_DEPTH.isSupported(this.renderer.getContext()) ;//iphoneX居然不支持
        //这意味着边缘增强和测量线遮挡失效
        if(!supportExtFragDepth)console.error('ExtFragDepth unsupported! 边缘增强和测量线遮挡失效')
        
        
		this.guiLoaded = false;
		this.guiLoadTasks = [];

		this.onVrListeners = [];
        
		this.messages = [];
		this.elMessages = $(`
		<div id="message_listing" 
			style="position: absolute; z-index: 1000; left: 10px; bottom: 10px">
		</div>`);
		$(domElement).append(this.elMessages);
		
         
        this.fakeMeasure = {};
         
         
       setTimeout(()=>{
           if(!Potree.settings.isWebgl2 && !Potree.browser.urlHasValue('webgl1')){
               console.warn('不支持webgl2')
           }
       },3000)
        
         
            
        try{
            
            if(!Potree.settings.isOfficial)  
            { // generate missing dom hierarchy
                if ($(domElement).find('#potree_map').length === 0) {
                    let potreeMap = $(`
                        <div id="potree_map" class="mapBox" style="position: absolute; left: 50px; top: 50px; width: 400px; height: 400px; display: none">
                            <div id="potree_map_header" style="position: absolute; width: 100%; height: 25px; top: 0px; background-color: rgba(0,0,0,0.5); z-index: 1000; border-top-left-radius: 3px; border-top-right-radius: 3px;">
                            </div>
                            <div id="potree_map_content" class="map" style="position: absolute; z-index: 100; top: 25px; width: 100%; height: calc(100% - 25px); border: 2px solid rgba(0,0,0,0.5); box-sizing: border-box;"></div>
                        </div>
                    `);
                    $(domElement).append(potreeMap);
                }

                if ($(domElement).find('#potree_description').length === 0) {
                    let potreeDescription = $(`<div id="potree_description" class="potree_info_text"></div>`);
                    $(domElement).append(potreeDescription);
                }

                if ($(domElement).find('#potree_annotations').length === 0) {
                    let potreeAnnotationContainer = $(`
                        <div id="potree_annotation_container" 
                            style="position: absolute; z-index: 100000; width: 100%; height: 100%; pointer-events: none;"></div>`);
                    $(domElement).append(potreeAnnotationContainer);
                } 

                if ($(domElement).find('#potree_quick_buttons').length === 0) {
                    let potreeMap = $(`
                        <div id="potree_quick_buttons" class="quick_buttons_container" style="">
                        </div>
                    `);
  
                    $(domElement).append(potreeMap);
                }
                
                //add
                { 
                    $(domElement).append($("<div id='potree_labels'></div>"));
                    if(!mapArea && (Potree.settings.editType != 'merge' /* || Potree.settings.showObjectsOnMap */)){
                        mapArea = $("<div id='mapGaode'></div>");
                        $(domElement).append(mapArea);
                        mapArea = mapArea[0];
                    }
                    
                }
                 
             
               /*  let domRoot = this.renderer.domElement.parentElement; 
                let elAttach = $("<input type='button' value='test'></input>");
                elAttach.css({
                    position : "absolute",
                    right : '10%',
                    bottom: '20px',
                    zIndex: "10000",
                    fontSize:'1em', color:"black",
                    background:'rgba(255,255,255,0.8)',
                })
                let state = false
                elAttach.on("click", () => {
                    window.buttonFunction &&  window.buttonFunction()
                }); 
                domRoot.appendChild(elAttach[0]); */
                 
            }
            
            this.tiles3dMemoryUsage = 0
            
            this.pointCloudLoadedCallback = args.onPointCloudLoaded || function () {};

            // if( /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent) ) {
            //	defaultSettings.navigation = "Orbit";
            // }

            this.server = null;

            this.fov = 60;
            this.isFlipYZ = false;
            this.useDEMCollisions = false;
            this.generateDEM = false;
            this.minNodeSize = 30;   //允许加载的node的最小可见像素宽度。越大越省性能
            this.edlStrength = 1.0;
            this.edlRadius = 1.4;
            this.edlOpacity = 1.0;
            this.useEDL = false;
            this.description = "";

            this.classifications = ClassificationScheme.DEFAULT;

            this.moveSpeed = 1;

            this.lengthUnit = LengthUnits.METER;
            this.lengthUnitDisplay = LengthUnits.METER;

            this.showBoundingBox = false;
            this.showAnnotations = true;
            this.freeze = false;
             

            this.elevationGradientRepeat = ElevationGradientRepeat.CLAMP;

            this.filterReturnNumberRange = [0, 7];
            this.filterNumberOfReturnsRange = [0, 7];
            this.filterGPSTimeRange = [-Infinity, Infinity];
            this.filterPointSourceIDRange = [0, 65535];

            this.potreeRenderer = null;
            this.edlRenderer = null; 
            this.pRenderer = null;

            this.scene = null;
            this.sceneVR = null;
            this.overlay = null;
            this.overlayCamera = null;

            this.inputHandler = null;
            this.controls = null;

            this.clippingTool =  null;
            this.transformationTool = null;
            this.navigationCube = null;
            this.compass = null;
            
            this.skybox = null;
            this.clock = new THREE.Clock();
            this.background = null;

            this.buffers = new Map  
      
            if(args.noDragAndDrop){
                
            }else{
                this.initDragAndDrop();
            }

            if(Potree.settings.isTest){
                this.stats = new Stats();
                this.stats.showPanel( 2 ); // 0: fps, 1: ms, 2: mb, 3+: custom
                document.body.appendChild( this.stats.dom );
            }

           

            {
                this.overlay = new THREE.Scene();
                this.overlayCamera = new THREE.OrthographicCamera(
                    0, 1,
                    1, 0,
                    -1000, 1000
                );
            }
            
            this.pRenderer = new Renderer(this.renderer);
            
            {
                let near = 2.5;
                let far = 10.0;
                let fov = 90;
                
                this.shadowTestCam = new THREE.PerspectiveCamera(90, 1, near, far);
                this.shadowTestCam.position.set(3.50, -2.80, 8.561);
                this.shadowTestCam.lookAt(new THREE.Vector3(0, 0, 4.87));
            }
            
             
            

            let scene = new ExtendScene(this.renderer);
            
            { // create VR scene
                this.sceneVR = new THREE.Scene();

                // let texture = new THREE.TextureLoader().load(`${Potree.resourcePath}/images/vr_controller_help.jpg`);

                // let plane = new THREE.PlaneBufferGeometry(1, 1, 1, 1);
                // let infoMaterial = new THREE.MeshBasicMaterial({map: texture});
                // let infoNode = new THREE.Mesh(plane, infoMaterial);
                // infoNode.position.set(-0.5, 1, 0);
                // infoNode.scale.set(0.4, 0.3, 1);
                // infoNode.lookAt(0, 1, 0)
                // this.sceneVR.add(infoNode);

                // window.infoNode = infoNode;
            }

            this.setScene(scene);
            
            
            //add:  for 截图时抗锯齿
              
            {
               /*  this.composer = new EffectComposer( this.renderer );
                this.ssaaRenderPass = new SSAARenderPass(0x000000, 0);
                this.composer.addPass( this.ssaaRenderPass ); 
                  */
                //this.ssaaRenderPass.useCopy = true
                //this.ssaaRenderPass.renderToScreen = true; 
                //this.ssaaRenderPass.needsSwap = false
                //见 https://threejs.org/examples/?q=AA#webgl_postprocessing_fxaa 效果和SSAA差不多，都对透明不太友好。
                 
                /* let outlinePass = this.outlinePass = new OutlinePass( ); 
                this.ssaaRenderPass.addPass(outlinePass) 
                 */
                //ssaa有透明度、发黑的问题所以不用了
              
                //-------------------------- 
                
                
                this.composer = new EffectComposer( this.renderer );  
                this.composer.scaleRatio = 4 //将底图和测量线绘制在一张高倍贴图上，for测量线不模糊
                this.composer.readTarget = true  //把底图和测量线一起fxaa 
                /* const renderPass = new RenderPass();
                
				//renderPass.clearColor = new THREE.Color( 0,0,0 );      
				//renderPass.clearAlpha = 0; 
                renderPass.clear = !this.composer.readTarget 
                this.composer.addPass( renderPass );  
                 */
                 
                 
                //for 融合页面 
                let outlinePass = this.outlinePass = new OutlinePass( );
                outlinePass.renderToScreen = true  //这样更流畅，不用ssaa了，缺点是outline有锯齿
                outlinePass.enabled = false
                this.composer.addPass( outlinePass );
                outlinePass.edgeStrength = 4
                outlinePass.edgeGlow = 0 
                outlinePass.visibleEdgeColor = new THREE.Color("#09a1b3")   
                 
                 
                
                /* this.fxaaPass = new ShaderPass( FXAAShader );  
                this.fxaaPass.readTarget = true //add 
                this.fxaaPass.setSize = function(width, height){
                    this.material.uniforms[ 'resolution' ].value.x = 1 / ( width )  ;
                    this.material.uniforms[ 'resolution' ].value.y = 1 / ( height )  ;  
                } 
                this.fxaaPass.renderToScreen = true;
                
				this.composer.addPass( this.fxaaPass );  */
                //抗锯齿截图 效果时而好时而不好，文字比较模糊 
                //这两个暂时不能一起用。目前刚好不需要一起用
                
                /* this.images360.fastTranMaskPass = new FastTranPass( this.renderer )
                this.composer.addPass(this.images360.fastTranMaskPass)//add */
                
                
            }
            
            

            {   
                this.mainViewport = new Viewport(  this.scene.view, this.scene.cameraP, {
                    left:0, bottom:0, width:1, height: 1, name:'MainView' 
                }) 
                this.viewports = [this.mainViewport]       
                Potree.settings.showCompass && this.addCompass()
                
                
                
                
                //this.axis = new AxisViewer(this.mainViewport, this.renderArea )
                
                 
                this.magnifier = new Magnifier(this);
                this.reticule = new Reticule(this) 
                this.scene.scene.add(this.magnifier) 
                this.scene.scene.add(this.reticule)
                
                
                if(Potree.settings.editType != "pano" && (Potree.settings.editType != 'merge' /* || Potree.settings.showObjectsOnMap */) && !args.noMap){
                    this.mapViewer = new MapViewer(mapArea/* $('#mapGaode')[0] */)
                }
                
                this.inputHandler = new InputHandler(this, this.scene.scene);
                this.inputHandler.containsMouse = true//初始化，使键盘事件在mainViewer有效
                this.inputHandler.registerInteractiveScene(this.scene.overlayScene);
                //this.inputHandler.setScene(this.scene);
                //this.inputHandler.addInputListener(this);//add
                
                this.clippingTool = new ClippingTool(this);
                this.transformationTool = new TransformationTool(this);
                this.navigationCube = new NavigationCube(this);
                this.navigationCube.visible = false;

                
                
                 
                
                this.createControls();

                this.clippingTool.setScene(this.scene);
                
                let onPointcloudAdded = (e) => {
                    if (this.scene.pointclouds.length === 1) {
                        let speed = e.pointcloud.boundingBox.getSize(new THREE.Vector3()).length();
                        speed = speed / 2000;
                        this.setMoveSpeed(speed);
                    }
                };

                let onVolumeRemoved = (e) => {
                    this.inputHandler.deselect(e.volume);
                };

                this.addEventListener('scene_changed', (e) => {
                    this.inputHandler.setScene(e.scene);
                    this.clippingTool.setScene(this.scene);
                    
                    if(!e.scene.hasEventListener("pointcloud_added", onPointcloudAdded)){
                        e.scene.addEventListener("pointcloud_added", onPointcloudAdded);
                    }

                    if(!e.scene.hasEventListener("volume_removed", onPointcloudAdded)){
                        e.scene.addEventListener("volume_removed", onVolumeRemoved);
                    }
                    
                });

                this.scene.addEventListener("volume_removed", onVolumeRemoved);
                this.scene.addEventListener('pointcloud_added', onPointcloudAdded);
            }

            { // set defaults
                this.setFOV(60);
                this.setEDLEnabled(false);
                this.setEDLRadius(3);
                this.setEDLStrength(0.01);
                this.setEDLOpacity(1.0);
                 
                this.setPointBudget(1*1000*1000);
                this.setShowBoundingBox(false);
                this.setFreeze(false);
                this.setControls(this.fpControls/* orbitControls */);
                this.setBackground(  new THREE.Color(Potree.config.background),1 /*    'gradient' */  );
            
                this.scaleFactor = 1;

                this.loadSettingsFromURL();
            } 

            // start rendering!
            //if(args.useDefaultRenderLoop === undefined || args.useDefaultRenderLoop === true){
                //requestAnimationFrame(this.loop.bind(this));
            //}
         

            this.renderer.setAnimationLoop(this.loop.bind(this));

            this.loadGUI = this.loadGUI.bind(this);

            this.annotationTool = new AnnotationTool(this);
            this.measuringTool = new MeasuringTool(this);
            //this.profileTool = new ProfileTool(this);
            this.volumeTool = new VolumeTool(this);
            this.tagTool = new TagTool(this);
            
            
            
            
            //-----------
            CursorDeal.init(this, this.mapViewer ? [this, this.mapViewer] : [this])//ADD
            if(Potree.settings.editType == "pano"){
                this.modules.PanoEditor.init()
                this.modules.SiteModel.init()  //add
            }else if(Potree.settings.editType == "merge"){
                this.modules.MergeEditor.init()
            }else{
                this.modules.SiteModel.init()
                this.modules.ParticleEditor.init()
            }                
            this.modules.Alignment.init()
            
            
            
            this.images360 = new Images360(this);
            
            this.scene.scene.add(this.objs);
             
             
            //add test
            /* const environment = new RoomEnvironment();
            const pmremGenerator = new THREE.PMREMGenerator( this.renderer ); 
            this.scene.scene.environment = pmremGenerator.fromScene( environment ).texture;
            */
            
            //-----------
            
            
            this.modules.volumeComputer && this.modules.volumeComputer.init()
            
            
		}catch(e){
			this.onCrash(e);
		}
        
        //-----------------------add----------------------------------------------------
        
        
         
        
        /* {
            let ratio
            this.addEventListener('resize',(e)=>{
                if(ratio != e.deviceRatio){ //因为devicePixelRatio会影响到点云大小，所以改变时计算下点云大小
                    viewer.scene.pointclouds.forEach(p => {
                        p.changePointSize()
                    })
                }
                ratio = e.deviceRatio
                
            }) 
        } */
        
        { 
            let pointDensity = ''
            Object.defineProperty(Potree.settings , "pointDensity",{ 
                get: function() {
                    return pointDensity
                },
                set: (density)=>{
                    if(density){   
                        let config = Potree.config.pointDensity[density];
                        let pointBudget = config.pointBudget;
                        if(density == 'magnifier'){//尽可能不变pointBudget，否则点云可能会闪烁，因点云被释放又加载，如SS-t-7DUfWAUZ3V 
                            pointBudget = Math.max(Potree.pointBudget,  Potree.config.pointDensity['magnifier'].pointBudget)
                        }else if(this.magnifier.visible){//放大镜打开时要保证最低点云数量（全景模式没点）
                            pointBudget = Math.max(pointBudget,  Potree.config.pointDensity['magnifier'].pointBudget)
                        } 
                         
                        viewer.setMinNodeSize(config.minNodeSize || Potree.config.minNodeSize)
                        viewer.setPointBudget(pointBudget ); 
                        
                        pointDensity = density
                        
                        this.setPointLevels()
                        
                        this.dispatchEvent('pointDensityChanged')
                    }
                }
            })
            
            let UserPointDensity = ''
            Object.defineProperty(Potree.settings , "UserPointDensity",{ 
                get: function() {
                    return UserPointDensity
                },
                set: (density)=>{
                    if(UserPointDensity != density){
                        if(Potree.settings.displayMode == 'showPointCloud' && this.viewports.length != 4){//漫游模式和四屏时都有自己的pointDensity
                            Potree.settings.pointDensity = density 
                        }
                        UserPointDensity = density
                        this.dispatchEvent('UserPointDensityChanged')
                    }
                }
            })
           
            
        }
        {
            
            let cameraFar = Potree.settings.cameraFar
            Object.defineProperty(Potree.settings , "cameraFar",{ 
                get: function() {
                    return cameraFar
                },
                set: (far)=>{
                    if(far != cameraFar){
                        if(Potree.settings.displayMode != 'showPanos' && !this.fixCamFar){
                            this.mainViewport.camera.far = far;
                            this.mainViewport.camera.updateProjectionMatrix()
                        }
                        cameraFar = far
                    }
                }
            }) 
            
        }
        
        
        /* this.reticule.addEventListener('update',(e)=>{
            this.needRender = true 
            if(this.mapViewer && this.mapViewer.attachedToViewer)this.mapViewer.needRender = true  //分屏时mapViewer也有reticule
        }) */
        
        this.reticule.addEventListener('update',(e)=>{  
            this.reticule.hoverViewport && (this.reticule.hoverViewport.needRender = true)
            this.lazyRenderViewports()
            if(this.mapViewer && this.mapViewer.attachedToViewer &&
                 (this.mapViewer.viewports[0].needRender || this.needRender ) ) this.mapViewer.needRender = true  //分屏时mapViewer也有reticule
        })
        
         
        this.addEventListener('pointcloud_changed',(e)=>{ 
            if(this.screenshoting){
                this.viewports.filter(e=>!e.noPointcloud).forEach(e =>e.needRender = true) 
            }
            else this.lazyRenderViewports()
        })
        
        if(!Potree.settings.pathSmooth && Potree.settings.editType == 'merge' ){
            viewer.addEventListener('camera_changed',(e)=>{
                if(e.viewport == viewer.mainViewport && (e.changeInfo.positionChanged)){ 
                    Common.intervalTool.isWaiting('updatePathArrows', ()=>{  
                        Potree.Path.updateArrows()     
                    },1000)  
                }
            }) 
        } 
        
        this.addEventListener('allLoaded', ()=>{
            this.allLoaded = true
             
            setTimeout(this.testPointcloudsMaxLevel.bind(this), 1000) //延迟一丢丢，等画面出现
            
            //Potree.settings.renderAllViewports = browser.maybeQilin() && this.renderer.capabilities.maxCubemapSize <= 2048 && //麒麟chromium若获取过webgl2只渲染一个viewport的话其他的会变黑
            
            this.scene.pointclouds.forEach(pointcloud=>{
                pointcloud.addEventListener('isVisible',(e)=>{//是否显示该点的mesh(不显示也能走）
                    //console.log('pointcloud  isVisible', this.id, e.visible)  
                    if(e.reason != 'displayMode' && e.reason != 'overlinePass'){
                         this.updateModelBound('visibleChanged')
                    }
                    this.dispatchEvent('pointcloud_changed') 
                })
                pointcloud.material.addEventListener('material_property_changed',()=>{
                    this.dispatchEvent('pointcloud_changed') 
                }) 
                
            })
            
            
            
            window.addEventListener('unfocusPage',(e)=>{
                console.log('unfocusPage',document.title) 
                this.setDisplay(false)
            })
            window.addEventListener('focusPage',(e)=>{
                console.log('focusPage',document.title) 
                this.setDisplay(true) 
            })
             
             
            this.createHackMesh() 
             
        },{once:true}) 
        
         
        
        
        if(Potree.settings.editType != 'pano' && Potree.settings.editType != 'merge' || Potree.settings.mergeType2){  
            let updated, zoomLevel
            let update = (e)=>{ 
                if(e.type == 'updateModelBound' || e.viewport == this.mainViewport && (e.changeInfo.positionChanged || zoomLevel != this.images360.zoomLevel)){ 
                    zoomLevel = this.images360.zoomLevel;  //对updateMarkerVisibles有影响
                    //e.changeInfo.positionChanged && shelterHistory.clear() //清空
                    (e.type == 'updateModelBound' || e.changeInfo.positionChanged) && this.updateDatasetAt()  //更新所在数据集  
                    
                    if(Potree.settings.ifShowMarker ){
                       
                        Common.intervalTool.isWaiting('updateMarkerVisibles', ()=>{  
                            if(!this.mainViewport.view.isFlying() ){ 
                                this.updateMarkerVisibles()  
                            }    
                        },500)
                    }
                }
                
            }
            
            this.addEventListener('camera_changed', update) 
            this.addEventListener('updateModelBound', update) 

            this.addEventListener('showMarkerChanged',()=>{
                this.updatePanosVisibles(this.modules.SiteModel.currentFloor)
                this.updateMarkerVisibles()
            })
            
            
            
            /* if(!Potree.Features.EXT_DEPTH.isSupported()){
            
                this.images360.addEventListener('endChangeMode',(e)=>{  
                    if(e.mode == 'showPanos'){ 
                        this.updateMarkerVisibles()
                    } 
                }) */
                this.images360.addEventListener('getNeighbourAuto',(e)=>{  
                    if(/* Potree.settings.displayMode == 'showPanos' &&  */e.panos.includes(this.images360.currentPano)){ 
                        Common.intervalTool.isWaiting('updateMarkerVisibles', ()=>{  
                            this.updateMarkerVisibles()   
                        },500) 
                    }
                })
                    
            /* } */
            
            
        } 
         
        this.modules.SiteModel?.bus.addEventListener('FloorChange',(e)=>{
             if(Potree.settings.editType == 'pano'){
                 if(this.modules.PanoEditor.entered)return //点位编辑时楼层按钮高亮的是显示的楼层，而不是所在楼层
                 this.modules.PanoEditor.dispatchEvent({type:'changeFloor', floor:e.currentFloor})
             }else{
                 this.updateFpVisiDatasets()
                 this.updatePanosVisibles(e.currentFloor)       //问：编辑空间模型时，需不需要改为显示当前选择的楼层。因为若所在楼层和选中的不一致，修改选中楼层的轮廓却改不了marker显示很奇怪，尤其刚好在一个建筑内时。
             }
        }) 
        
        if(Potree.settings.editType != 'pano' &&  Potree.settings.editType != 'merge'){
              
            this.mapViewer && this.addEventListener('switchFloorplanSelect',(e)=>{//进入平面图设置后 切换选中的数据集
                this.selectedFloorplan = e.pointcloud;  //绝对显示
                this.updateFpVisiDatasets()
                let pointclouds;
                if(e.pointcloud){
                    pointclouds = [e.pointcloud]
                }else if(this.fpVisiDatasets.length){
                    pointclouds = this.fpVisiDatasets
                }
                
                pointclouds && this.mapViewer.fitToDatasets(pointclouds) 
                
            })
             
            
            this.mapViewer?.mapLayer.addEventListener('floorplanLoaded',()=>{
                 this.updateCadVisibles(this.fpVisiDatasets, true)   //加载完成后重新更新下
            })
                
            /* this.modules.Clip.bus.addEventListener('updateSelectedDatasets',()=>{
                 this.updateFpVisiDatasets()
            }) */
                
            
        }
        
        
        
        { 
            let interval 
            document.addEventListener('visibilitychange',(e)=>{ 
                let v = !document.hidden
                //console.warn('visibilitychange', v )
                this.dispatchEvent({type:'pageVisible', v } )
                //this.pageHiddenCollect.push({time:performance.now, visible:v})
                
                if(!v){
                    let marks = performance.getEntriesByName("loop-start")
                    marks.length && (marks[marks.length-1].pageHidden = true)
                }
                
                if(this.screenshoting && !v){//截图过程中离开页面需要照常loop。但是尽量别离开页面，效果只能达到90%
                    interval = setInterval(()=>{
                        //console.log('force loop', Date.now())
                        if(this.screenshoting){ //截图完成时如果还没回来就不loop
                            this.loop(Date.now()) 
                        }
                    },50)  //实际>1000， 浏览器会放慢定时器，放慢多少不确定
                }else if(v && interval){
                    clearInterval(interval)
                }   
            })
        }
        
        /* if(!Potree.isIframeChild){
            window.winIndex = 0;
            let index = 1;
            this.addEventListener('createIframe',(e)=>{//创建了子页面
                let child = e.window;
                child.winIndex = index ++; 
            }) 
            //不知道删除iframe时是否那些模型还在内存里，需要释放吗？ 如果要需要加一个事件
        } */
        
        
        
        /* {
            let setInteract = ()=>{
                this.interacted = true //标记这一帧用户有操作屏幕
            }
            this.addEventListener('global_mousedown', setInteract)
            this.addEventListener('global_touchmove', setInteract)
            this.addEventListener('global_mousewheel', setInteract)
              
        } 
        
        
        
        {//针对数据集偏离中心很远后产生的精度损失而抖动
            this.addEventListener('camera_changed', e => { 
                if(e.viewport == this.mainViewport && (e.changeInfo.positionChanged)){  
                    if(Potree.settings.editType != 'merge' && Potree.settings.editType != 'pano'){ 
                        if(!this.mainViewport.view.isFlying() ){ 
                            let pos =  this.mainViewport.view.position.clone() // this.mainViewport.camera.getWorldPosition(new THREE.Vector3) 
                            if(pos.lengthSq() > 25000000){
                                Common.intervalTool.isWaiting('moveWorldCenter', ()=>{
                                    pos = this.mainViewport.view.position.clone()
                                     
                                    this.mainViewport.view.translateWorld(-pos.x, -pos.y, -pos.z)  
                                    this.scene.scene.position.sub(pos)
                                    console.log('变位置', pos)
                                    
                                    this.scene.pointclouds.forEach(cloud=>{
                                        Alignment.setMatrix(cloud)
                                    }) 
                                    
                                },500)
                            }
                        }  
                    }
                }
            })
        }*/
        
	}
    
    
    addCompass(){
        if(this.compass)return
        
        this.compass = new Compass(Potree.settings.compassDom, this.mainViewport) ; 
        
        if(!Potree.settings.editType){//激光场景
            this.floorCompass = new FloorCompass(this)
        }
    }
    
    
    lazyRenderViewports(updateCount){
        //本来要写this.needRender = true的， 但在分四个屏时防止太卡而排队render
        let viewports = this.viewports
        if(viewports.length == 1 || this.needRender){
            return this.needRender = true
        }
        
          
        const maxWaitTime = 200
        
        let now = Date.now()  
       
        let maxRenderCount = 1 
          
        viewports.forEach(e=>{ 
            if(now - e.lastRenderTime  > maxWaitTime){
                e.needRender = true 
            }
        }) 
        
        let renderCount = viewports.filter(e=>e.needRender).length 
        //console.log('renderCount', renderCount)
         
        let list = viewports.filter(e=>!e.needRender).sort((a,b)=>a.lastRenderTime - b.lastRenderTime)//没有准备render的，按上次渲染时间排序，作为候补
     
        if(renderCount < maxRenderCount){ //还有名额，补齐
            list.slice(0, maxRenderCount - renderCount).forEach(e=>{
                e.needRender = true
            })   
        }else if(list[0] && now - list[0].lastRenderTime > maxWaitTime){//名额不足时，考虑候补队列第一个是否超时，超时的话也渲染
            list[0].needRender = true
        } 
          
        
    }
    
    getObjectPointCount(object){
        let posCount = 0, texArea = 0
        object.traverse((mesh, o={})=>{
            //let visi = o.visible === false ? false : mesh.visible    //mesh.realVisible() //如果祖先不可见，此mesh一定不可见
            if(mesh.geometry){
                posCount += mesh.geometry.attributes.position.count 
                //visi && (visiPosCount += mesh.geometry.attributes.position.count)
            }
            /* if(mesh.material && !mesh.material.map){
                console.log('!mesh.material.map ?')
            } */
            if(mesh.material){
                let mats = (mesh.material instanceof Array) ? mesh.material : [mesh.material]
                mats.forEach(mat =>{
                    let map = mat.map  
                    if(map ){
                        if(!map.image){
                            console.error('!mat.map.image  ??', mat.map.uuid)//obj可能会
                            return
                        }
                        texArea += map.image.width * map.image.height  
                        //visi && (visiTexArea += a)
                    }
                })
            }
            
            
            //return {visible:visi}
        })
        return {posCount , texArea }
    }
     
    
    ifPointBlockedByIntersect(point , panoId,  soon ){//点是否被遮挡
        let ifShelter
        let now = Date.now()
        let extraPanoId = panoId != void 0 
        if(!this.shelterCount)return
        
        let history = shelterHistory.find(e=>e.point.equals(point)) 
        let cameraPos = this.mainViewport.view.position.clone()
        if(panoId == void 0){
            if(this.images360.isAtPano(0.05)){
                panoId = this.images360.currentPano.id
            }
        }
        
        
        
        if(history){ 
            if(panoId != void 0){
                ifShelter = history.panos[panoId];  
            }else{
                if(history.notAtPano.cameraPos && history.notAtPano.cameraPos.equals(cameraPos)){
                    ifShelter = history.notAtPano.ifShelter
                }
            }
            
            let index = shelterHistory.indexOf(history)  //先取出，稍后放回
            shelterHistory.splice(index, 1)
            
        }else{//新增
            history = {point,  panos:{}, notAtPano:{}} 
             
            const minCount = 100
            if(shelterHistory.length > minCount){//去除最早的
                let old 
                while(old = shelterHistory[0], now - old.lastTime > 1000){//因为不知热点个数，所以需要加上时间限制，超过时间才能删。
                    if(old == history || shelterHistory.length == minCount)break;
                    shelterHistory.splice(0,1)
                    //console.log('delete')
                } 
            } 
        }  
        
        
        if(ifShelter == void 0){ 
            delete history.waitCompute
        
            if(this.mainViewport.view.isFlying()){ 
                return useLastResult() 
            }
            
            if(panoId != void 0){
                let pano = this.images360.getPano(panoId)
                if((soon || this.shelterCount.byTex<this.shelterCount.maxByTex) && pano.depthTex){
                    ifShelter = !!viewer.inputHandler.ifBlockedByIntersect({point, margin:Potree.config.shelterMargin, useDepthTex:true, pano, viewport:this.mainViewport  }  ) 
                    history.panos[panoId] = ifShelter
                    this.shelterCount.byTex ++ ;
                    //console.log('computeByTex direct', panoId, point, ifShelter)
                }else{
                    //soon的无tex不敢写……
                    //console.log('延迟tex',panoId, point )
                    history.waitCompute = {panoId,   forceGet:extraPanoId  }
                    return useLastResult() 
                }
            }else{ 
                if(/* history.ifShelter == void 0 || */ this.shelterCount.byCloud<this.shelterCount.maxByCloud){//弊端：第一个总是直接计算，后面的都是延后。但无法改进，因是一个个传进来的，无法预测。 
                    ifShelter = !!viewer.inputHandler.ifBlockedByIntersect({point, margin:Potree.config.shelterMargin, pickWindowSize:3}  ) 
                    history.notAtPano = {cameraPos , ifShelter }
                    this.shelterCount.byCloud ++ ; 
                    //console.log('computeByCloud direct', point.toArray())
                }else{
                    //console.log('延迟cloud' )
                    history.waitCompute = {cameraPos}
                    return useLastResult() 
                }
                
            }
             
        }
        
        
        history.ifShelter = ifShelter
        history.lastTime = now
        shelterHistory.push(history) //最新使用的保持在最后一个，使队列按照从旧到新排列
        
        
        
        
        function useLastResult(){//暂时先用上一次的值
            shelterHistory.push(history)
            history.lastTime = now
            return history.ifShelter
        }
         
        
        return ifShelter 
    }
     
    
    
    
    computeShelter(){
        //先算用深度图的，然后再点云；
        
        //let depthTiming = Potree.timeCollect.depthSampler.median 
        let byTex=0,  byCloud=0;
        let len = shelterHistory.length;
        let waitCloud = []
         
        let maxTexCount = Common.getBestCount('shelterMaxDepthSample', 1,  50,   1,  13    /* ,true    */ ) 
        
        
        
        for(let i=len-1; i>=0; i--){
            let history = shelterHistory[i];
            
            if(history.waitCompute){
                let panoId = history.waitCompute.panoId
                if(panoId != void 0){
                     if(!history.waitCompute.forceGet && (panoId != this.images360.currentPano?.id || !this.images360.isAtPano(0.1))){
                         delete history.waitCompute //取消计算
                     }else{
                         let pano = this.images360.getPano(panoId)
                         if(pano.depthTex){ 
                             if(byTex >= maxTexCount)break
                             
                             byTex ++
                             let ifShelter = !!viewer.inputHandler.ifBlockedByIntersect({point:history.point, pano, margin:Potree.config.shelterMargin, useDepthTex:true, viewport:this.mainViewport }  ) 
                             history.panos[panoId] = ifShelter 
                             history.ifShelter = ifShelter
                             delete history.waitCompute  
                             //console.log('补1', history.point.toArray())
                         }else{
                             if(pano.pointcloud.hasDepthTex){
                                 //先等待加载完深度图
                             }else{
                                waitCloud.push(history)
                             }
                         }
                     }
                }else{
                    waitCloud.push(history)
                }
            }  
        }
        
        let maxCloudCount
        if(byTex < maxTexCount && waitCloud.length ){
            maxCloudCount = this.lastFrameChanged ? Common.getBestCount('shelterMaxCloud', 0, 2,  4,  8    /*  ,true   */   ) : 5;
            let waitCloud2 = []
            if(maxCloudCount){
                for(let i=0; i<waitCloud.length; i++){ 
                    
                    let history = waitCloud[i];
                    if(history.waitCompute.cameraPos){
                        if(!viewer.mainViewport.view.position.equals(history.waitCompute.cameraPos)){
                            delete history.waitCompute 
                            //console.log('delete history.waitCompute', history)
                            continue; //取消计算
                        }else{
                            waitCloud2.push(history) 
                        }
                    }else{
                        waitCloud2.push(history) 
                    } 
                }
             
            
            
            
                let list = waitCloud2.map(e=>e.point) 
                let result = Common.batchHandling.getSlice('shelterByCloud', list, {maxUseCount:maxCloudCount,useEquals:true, stopWhenAllUsed:true} ) //iphonex稳定后大概在7-10。  
                //list.length>0 && console.log('list',list, maxCloudCount)
                
                result.list.forEach(e=>{
                    let history = waitCloud2.find(a=>a.point.equals(e))
                    let panoId = history.waitCompute.panoId
                    let cameraPos = (panoId != void 0 && panoId != this.images360.currentPano?.id) && this.images360.getPano(panoId).position  //如果非当前点，需要改相机位置
                    let ifShelter = !!viewer.inputHandler.ifBlockedByIntersect({point:history.point, cameraPos, margin: Potree.config.shelterMargin , pickWindowSize:3, viewport:this.mainViewport}  ) 
                    
                    if(history.waitCompute.cameraPos){
                        history.notAtPano = {cameraPos: history.waitCompute.cameraPos , ifShelter }
                    }else{
                        history.panos[panoId] = ifShelter 
                    }
                    history.ifShelter = ifShelter
                    byCloud++
                    //console.log('补2',  history.point.toArray()) 
                    delete history.waitCompute
                })
            
            } 
            
        }
        
        
        if(byTex || byCloud){
             //console.log('shelterComputed',byTex,byCloud, maxTexCount, maxCloudCount)
             Common.intervalTool.isWaiting('shelterComputed', ()=>{  
                //console.log('shelterComputed update')
                this.dispatchEvent('shelterComputed')  
            },340)
        }
        
    }
    
    updateDatasetAt(force){//更新所在数据集
    
        let fun = ()=>{   
            let currPos = viewer.mainViewport.view.position
         
            //if(force || !currPos.equals(this.lastPos)){
                //this.lastPos.copy(currPos)
                
                var at = this.scene.pointclouds.filter(e=>
                    (e.visible || e.unvisibleReasons && e.unvisibleReasons.length == 1 && e.unvisibleReasons[0].reason == 'displayMode')
                    && e.ifContainsPoint(currPos)
                ) 
                
                if(Common.getDifferenceSet(at, this.atDatasets).length){
                    //console.log('atDatasets', at) 
                    this.atDatasets = at
                    if(Potree.settings.editType != 'pano' && Potree.settings.editType != 'merge'){
                        this.updateFpVisiDatasets()
                        if(!viewer.modules.SiteModel.currentFloor){
                            this.updatePanosVisibles() //所在数据集的点位显示
                        }
                    }
                    this.dispatchEvent({type:'pointcloudAtChange',pointclouds:at}) 
                }
                force = false 
                 
            }
        //}            
        if(force)fun()
        else Common.intervalTool.isWaiting('atWhichDataset', fun , 300)  
        
    }

    
    updatePanosVisibles(currentFloor){//显示当前楼层的所有panos  
        if(!Potree.settings.ifShowMarker)return
        let inEntity = currentFloor 
        
        //console.error('updatePanosVisibles', currentFloor)
        
        viewer.images360.panos.forEach(pano=>{
            let visible = inEntity ? inEntity.panos.includes(pano) : this.atDatasets.some(e=>e.panos.includes(pano))
            
            Potree.Utils.updateVisible(pano, 'buildingChange', visible, 2)  
        })
        this.dispatchEvent('content_changed')
    } //注：非official的没有获取sitemodel的信息所以不执行楼层判断，marker显示不对是正常的
   
    /* 2023.11.24 针对部分场景的楼层很矮，很容易就到楼层外了，且不能修改楼高。如SG-t-9NdCpxrUPLL#/，采取如下措施：
    1 如果不在任何一楼层，但在某个数据集中，就显示该数据集所有的marker
    2 如果当前楼层无，则显示上一次的currentFloor的marker
    （目前先使用方案1）
     */
    
    
    updateMarkerVisibles(){//限制显示的marker个数，因镜头内marker多的时候可能会卡 
        if(!Potree.settings.ifShowMarker)return
       
        
        const minRadius = 8 * this.images360.zoomLevel,  //当视线垂直于marker时的最小可见距离，此范围内可见的pano绝对可见
            maxRadius = 50 * this.images360.zoomLevel,    //当视线垂直于marker时的最大可见距离，此范围外绝对不可见
            hopeCount = browser.isMobile() ? 8 : 15   //期望达到的真实可见的marker数
        
        
        let sheltered = (pano)=>{
            if(/* Potree.settings.displayMode == 'showPanos' && !Potree.Features.EXT_DEPTH.isSupported() && */this.images360.isAtPano() && !this.mainViewport.view.isFlying()){
                return !this.images360.isNeighbour(this.images360.currentPano, pano,{dontCompute:true}) //起初因不支持EXT_DEPTH时无法用depthTex遮住marker, 后为了减少绘制，都判断
            } 
        }
        
        let panoMap = new Map //先记录想要设置为可见的
        
        let set = ()=>{//最后确定设置
            let count = 0
            viewer.images360.panos.forEach(pano=>{
                let v = panoMap.get(pano).visible
                v && count++
                Potree.Utils.updateVisible(pano.marker, 'limitMarkerShow', v )  
            })
            //console.log('updateMarkerVisibles marker显示个数', count)
            this.dispatchEvent('content_changed')
        }
        let isWithinDis = (pano,maxDis)=>{//是否marker到相机的距离 没有超出可视距离。可视距离考虑上倾斜角，倾斜越大可视距离越短
            let camPos = viewer.mainViewport.camera.position
            let o = panoMap.get(pano)     
            o.dis = o.dis || camPos.distanceTo(pano.marker.position)
            o.sin = o.sin || Math.sqrt(Math.abs(camPos.z - pano.marker.position.z) / o.dis) //和地面夹角的sin。 按公式是不加Math.sqrt的，但是这样大马路上在贴近地面时算出的个数非常少，所以增大点……
            return o.dis < maxDis * o.sin 
        }
         
        
        viewer.images360.panos.forEach(pano=>{//minRadius内的记录为可见 
            let o = {}           
            panoMap.set(pano, o)
            if(pano.visible && !sheltered(pano) && isWithinDis(pano, minRadius)){
                o.visible = true; 
            }  
        })
        //不超过hopeCount的话，可以直接确定设置
        if(viewer.images360.panos.filter(pano=> panoMap.get(pano).visible ).length >= hopeCount)return set()
        
        //距离超过maxRadius就绝对不可见
        let insideOutCirle = viewer.images360.panos.filter(pano=> pano.visible && !sheltered(pano) && isWithinDis(pano, maxRadius))
        if(insideOutCirle.length <= hopeCount){
            insideOutCirle.forEach(pano=>panoMap.get(pano).visible = true )
            return set()
        }            
        
        //数量超过hopeCount时，根据距离排序
        insideOutCirle.sort((a,b)=>{return panoMap.get(a).dis - panoMap.get(b).dis  }) 
        let slice = insideOutCirle.slice(0,hopeCount)
        slice.forEach(pano=>panoMap.get(pano).visible = true )
        set()
        
    }
    
    
    
    updateFpVisiDatasets(){
        if(!this.mapViewer) return
        let Clip = this.modules.Clip
        let SiteModel = this.modules.SiteModel
        let Alignment = this.modules.Alignment
        var currentFloor = SiteModel.currentFloor;
        
        /* if(Clip.editing){//下载页面已经改为和普通时一样，根据位置判断
            
            this.updateCadVisibles(Clip.selectedDatasets)
              
        }else  */if(this.selectedFloorplan){//平面图设置中  或 地理设置
            let pointclouds = [this.selectedFloorplan]
            this.updateCadVisibles(pointclouds)
        }else if(SiteModel.editing || Alignment.editing){//只显示勾选的，也就是显示的点云的
            let pointclouds = this.scene.pointclouds.filter(p => Potree.Utils.getObjVisiByReason(p,'datasetSelection')  ); 
            this.updateCadVisibles(pointclouds)
            //this.updatePanosVisibles(currentFloor/* , pointclouds */)
        }else{ 
            let pointclouds = currentFloor ? this.findPointcloudsAtFloor(currentFloor) : []
             
            if(pointclouds.length == 0){
                if(this.focusDatasets){
                    pointclouds = this.focusDatasets  
                }  
            }
            if(pointclouds.length == 0){//如果当前不在任何楼层或楼层中无数据集，就用当前所在数据集
                pointclouds = this.atDatasets
            }
             
            this.updateCadVisibles(pointclouds)
            //this.updatePanosVisibles(currentFloor/* , pointclouds */)
        }
    }
    
 
    /* findPointcloudsAtFloor(entity){//找当前楼层需要显示哪些数据集。
        //数据集的belongToEntity 在这个entity内（否则会出现点击数据集飞过去平面图却不显示）。or 如果数据集有漫游点的话，需要包含>20%的漫游点。   （防止重叠体积很大但其实一个漫游点都不包含）
        //重叠体积>50%   或   包含>50%的漫游点 
         
        
        const ratio1 = 0.2, ratio2 = 0.5, ratio3 = 0.95
         
        var lowScores = []
         
        var pointclouds = viewer.scene.pointclouds.filter(e=>{
            let score = 0
            
            if(e.belongToEntity && (e.belongToEntity == entity || e.belongToEntity.buildParent == entity)){//条件1   若该数据集挂载到该楼层 或 该数据集挂载到的房间属于该楼层（这样能显示该层所有房间）
                return true
            }
            
            if(e.panos.length){//条件2
                var insidePanos = e.panos.filter(a=>entity.ifContainsPoint(a.position));
                let panoCountRatio = insidePanos.length / e.panos.length
                 
                if(panoCountRatio > ratio2)return true 
                
                score += panoCountRatio 
            } 
             
            //条件3
            let volume = entity.intersectPointcloudVolume(e);
            let volumeRatio = volume / entity.getVolume(true) //注：hole加入计算
            if(volumeRatio > ratio3){  //ratio3要高一些，因为点云bounding可能很大，包含很多无点云的空间。即使整个数据集包含entity都不一定看起来在数据集中。（千万要防止两层楼都显示了）
                return true 
            }else{
                score += volumeRatio
            }
            
            lowScores.push({score, pointcloud:e})
        })
        
        if(pointclouds.length == 0){//从低分项挑一个出来。 
            lowScores.sort((a,b)=>{return a.score - b.score})
            if(lowScores[0].score > 0.4){
                pointclouds = [lowScores[0].pointcloud]
            } 
        }
        
        
        return pointclouds
    } */
    
    findPointcloudsAtFloor(entity){//找当前楼层需要显示哪些数据集。
        //数据集的belongToEntity 在这个entity内（否则会出现点击数据集飞过去平面图却不显示）。or 如果数据集有漫游点的话，需要包含>20%的漫游点。   （防止重叠体积很大但其实一个漫游点都不包含）
        //重叠体积>50%   或   包含>50%的漫游点 
          
        
        const ratio1 = 0.2, ratio2 = 0.5, ratio3 = 0.95
         
        var lowScores = []
         
        var pointclouds = viewer.scene.pointclouds.filter(e=>{
            let score = 0
            
            if(e.belongToEntity && (e.belongToEntity == entity || e.belongToEntity.buildParent == entity)){//条件1   若该数据集挂载到该楼层 或 该数据集挂载到的房间属于该楼层（这样能显示该层所有房间）
                return true
            }
            
            if(e.panos.length){//条件2
                var insidePanos = e.panos.filter(a=>entity.ifContainsPoint(a.position));
                let panoCountRatio = insidePanos.length / e.panos.length
                 
                if(panoCountRatio > ratio2)return true 
                score += panoCountRatio * 2 
            } 
             
            //条件3
             
            let coverHeightRatio = entity.coverPointcloudHeight(e,true)//重叠高度占楼层高度的比率。
            if(coverHeightRatio < 0.2) return 
              
              
              
            let {toEntity,toPointcloud} = entity.intersectPointcloudArea(e,true);  //重叠面积占比 
            let coverAreaRatio = Math.max(toEntity,toPointcloud);//占数据集俯视面积的比率 和 占楼层的面积比率，挑一个大的。 （有的数据集被划分多个楼层，所以每层都应该显示该数据集的图。还有的数据集比较大，可能包含多个建筑，则看占楼层面积）
            if(coverAreaRatio < 0.2) return    
            score += coverAreaRatio * coverHeightRatio
            
            
            lowScores.push({score, pointcloud:e})
        })
        
        /* if(pointclouds.length == 0){//从低分项挑一个出来。 
            lowScores.sort((a,b)=>{return a.score - b.score})
            if(lowScores[0].score > 0.4){
                pointclouds = [lowScores[0].pointcloud]
            } 
        } */
        lowScores.forEach(e=>{//一个楼层里可以包含许多个数据集  调试SG-t-ds27ym7xzjJ
            if(e.score > 0.5){
                pointclouds.push(e.pointcloud)
            }
        })
        
        
        return pointclouds
    }
    
    
    
    updateCadVisibles(visiClouds, force){
        
        
        //console.log('visiClouds',visiClouds)
        
        let oldVisi = this.fpVisiDatasets
        var visiClouds = this.fpVisiDatasets = visiClouds
        
        if(!force){
            var difference = Common.getDifferenceSet(oldVisi , visiClouds) 
            if(difference.length == 0)return
        }
        //console.log('visiClouds',visiClouds.map(e=>e.name))
        
        viewer.scene.pointclouds.forEach(pointcloud=>{ 
            var floorplan = viewer.mapViewer.mapLayer.getFloorplan(pointcloud.dataset_id)
            var visi = visiClouds.includes(pointcloud) 
            if(floorplan){
                Potree.Utils.updateVisible(floorplan.objectGroup, 'buildingChange', visi)  
            }/* else if(!visi){   
                let changeVisi = (e)=>{
                    Potree.Utils.updateVisible(e.floorplan.objectGroup, 'buildingChange', this.fpVisiDatasets.includes(pointcloud)) 
                    viewer.mapViewer.mapLayer.removeEventListener('floorplanLoaded',  changeVisi)
                    console.log('updateCadVisibles加载后更改显示',e)
                } 
                viewer.mapViewer.mapLayer.addEventListener('floorplanLoaded',  changeVisi)
            } */  
            //已经添加了全局的  floorplanLoaded后会updateCadVisibles，这段就删了
        })
        viewer.mapViewer.mapLayer.needUpdate = true  //可能需要更新加载的level程度
        viewer.mapViewer.needRender = true //若上句不触发加载也要立即重新绘制
    }


     
    //促使点云加载出最高级别        
    testPointcloudsMaxLevel(){ //所有点云都无需testMaxNodeLevel 就停止
        let camera_changed,  count = 0
        let test = (e={})=>{
            camera_changed = true
            let camera = e.camera || this.scene.getActiveCamera()
            
            Common.intervalTool.isWaiting('testPointcloudsMaxLevel', ()=>{  
                if(!camera_changed && count>50 || Potree.settings.displayMode == 'showPanos' || this.pauseTestMaxLevel )return //只有当camera_changed后才继续循环， 除了最开始几次需要连续加载下
                camera_changed = false
                count ++;
                //console.log('testPointcloudsMaxLevel中', camera.type /* count */)
                let oldCount = this.testMaxNodeCount
                var success = true    
                viewer.scene.pointclouds.forEach(e=>{
                    var wait = e.testMaxNodeLevel(camera)
                    if(wait){
                        success = false; 
                    }
                })
                /* if(oldCount<=Potree.config.testNodeCount1  && this.testMaxNodeCount>Potree.config.testNodeCount1 ){//差不多等当前所在数据集nodeMaxLevel加载出来
                    viewer.scene.pointclouds.forEach(e=>{e.changePointSize()}) //重新更新一下大小。因之前用的是nodeMaxLevelPredict （防止刚开始因nodeMaxLevel没涨完，导致过大的点云突然出现
                } */ 
                if(!success)return true //没有全部加载完，继续循环      
                else {
                    this.removeEventListener('camera_changed',test)
                    console.log('testPointcloudsMaxLevel结束')

                }
                
            }, count<10 ? 250 : 500) 
        }            
        this.addEventListener('camera_changed',test) 
        test()
        
        /*  检验：
            viewer.scene.pointclouds.sort((a,b)=>a.nodeMaxLevelPredict.min - b.nodeMaxLevelPredict.min).forEach(e=>console.log(e.nodeMaxLevel, e.nodeMaxLevelPredict.min))
        
         */
        
    }
    
    
    
    setPointLevels(){ 
        this.scene.pointclouds.forEach(e=>{
            e.setPointLevel()
        })  
    }





	onCrash(error){
        console.error(error)
		$(this.renderArea).empty();

		if ($(this.renderArea).find('#potree_failpage').length === 0) {
			let elFailPage = $(`
			<div id="#potree_failpage" class="potree_failpage"> 
				
				<h1>Potree Encountered An Error </h1>

				<p>
				This may happen if your browser or graphics card is not supported.
				<br>
				We recommend to use 
				<a href="https://www.google.com/chrome/browser" target="_blank" style="color:initial">Chrome</a>
				or 
				<a href="https://www.mozilla.org/" target="_blank">Firefox</a>.
				</p>

				<p>
				Please also visit <a href="http://webglreport.com/" target="_blank">webglreport.com</a> and 
				check whether your system supports WebGL.
				</p>
				<p>
				If you are already using one of the recommended browsers and WebGL is enabled, 
				consider filing an issue report at <a href="https://github.com/potree/potree/issues" target="_blank">github</a>,<br>
				including your operating system, graphics card, browser and browser version, as well as the 
				error message below.<br>
				Please do not report errors on unsupported browsers.
				</p>

				<pre id="potree_error_console" style="width: 100%; height: 100%"></pre>
				
			</div>`);

			let elErrorMessage = elFailPage.find('#potree_error_console');
			elErrorMessage.html(error.stack);

			$(this.renderArea).append(elFailPage);
		}

		throw error;
	}

	// ------------------------------------------------------------------------------------
	// Viewer API
	// ------------------------------------------------------------------------------------

	setScene (scene) {
		if (scene === this.scene) {
			return;
		}

		let oldScene = this.scene;
		this.scene = scene;

		this.dispatchEvent({
			type: 'scene_changed',
			oldScene: oldScene,
			scene: scene
		});

		{ // Annotations
			$('.annotation').detach();

			// for(let annotation of this.scene.annotations){
			//	this.renderArea.appendChild(annotation.domElement[0]);
			// }

			this.scene.annotations.traverse(annotation => {
				this.renderArea.appendChild(annotation.domElement[0]);
			});

			if (!this.onAnnotationAdded) {
				this.onAnnotationAdded = e => {
				// console.log("annotation added: " + e.annotation.title);

					e.annotation.traverse(node => {

						$("#potree_annotation_container").append(node.domElement);
						//this.renderArea.appendChild(node.domElement[0]);
						node.scene = this.scene;
					});
				};
			}

			if (oldScene) {
				oldScene.annotations.removeEventListener('annotation_added', this.onAnnotationAdded);
			}
			this.scene.annotations.addEventListener('annotation_added', this.onAnnotationAdded);
		}
	};

	setControls(controls/* , setSpeed */){ 
		if (controls !== this.controls) {
			if (this.controls) {
                this.controls.setEnable(false) 
				//this.inputHandler.removeInputListener(this.controls);
                this.controls.moveSpeed = this.moveSpeed;  //记录   （因为orbit的radius很大，转为firstPerson时要缩小）
			} 
			this.controls = controls;
            controls.moveSpeed && this.setMoveSpeed(controls.moveSpeed) //add
            
            this.controls.setEnable(true) 
			 
			//this.inputHandler.addInputListener(this.controls);
		}
	}

	getControls () {

		if(this.renderer.xr.isPresenting){
			return this.vrControls;
		}else{
			return this.controls;
		}
		
	}

	getMinNodeSize () {
		return this.minNodeSize;
	};

	setMinNodeSize (value) {
		if (this.minNodeSize !== value) {
			this.minNodeSize = value;
			this.dispatchEvent({'type': 'minnodesize_changed', 'viewer': this});
		}
	};

	getBackground () {
		return this.background;
	}

	setBackground(bg, src){
		/* if (this.background === bg ) {
			return;
		} */

		if(bg === "skybox"){
            if(!src)src = Potree.resourcePath+'/textures/skybox/xingkong.jpg'
			this.skybox = Utils.loadSkybox(src, this.skybox, ()=>{
                this.background = bg;
            });
		}else{  this.background = bg;
        }
        this.backgroundOpacity = 1//add
		this.dispatchEvent({'type': 'background_changed', 'viewer': this});
	}

	setDescription (value) {
		this.description = value;
		
		$('#potree_description').html(value);
		//$('#potree_description').text(value);
	}

	getDescription(){
		return this.description;
	}

	setShowBoundingBox (value) {
		if (this.showBoundingBox !== value) {
			this.showBoundingBox = value;
			this.dispatchEvent({'type': 'show_boundingbox_changed', 'viewer': this});
		}
	};

	getShowBoundingBox () {
		return this.showBoundingBox;
	};

    

	setMoveSpeed (value) {
		if (this.getMoveSpeed() !== value) {
			this.mainViewport.setMoveSpeed(value)
			this.dispatchEvent({'type': 'move_speed_changed', 'viewer': this, 'speed': value});
		}
	};

	getMoveSpeed () {
		return this.mainViewport.moveSpeed;
	}; 

	setWeightClassification (w) {
		for (let i = 0; i < this.scene.pointclouds.length; i++) {
			this.scene.pointclouds[i].material.weightClassification = w;
			this.dispatchEvent({'type': 'attribute_weights_changed' + i, 'viewer': this});
		}
	};

	setFreeze (value) {
		value = Boolean(value);
		if (this.freeze !== value) {
			this.freeze = value;
			this.dispatchEvent({'type': 'freeze_changed', 'viewer': this});
		}
	};

	getFreeze () {
		return this.freeze;
	};

	 
	setElevationGradientRepeat(value){
		if(this.elevationGradientRepeat !== value){

			this.elevationGradientRepeat = value;

			this.dispatchEvent({
				type: "elevation_gradient_repeat_changed", 
				viewer: this});
		}
	}

	setPointBudget (value) { //pointBudget: 每次刷新显示点数量的最大值。  缓存中的点数量也跟此有关，但大于这个数值。
		if (Potree.pointBudget !== value && value) {
			Potree.pointBudget = parseInt(value);
			this.dispatchEvent({'type': 'point_budget_changed', 'viewer': this});
		}
	};

	getPointBudget () {
		return Potree.pointBudget;
	};

	setShowAnnotations (value) {
		if (this.showAnnotations !== value) {
			this.showAnnotations = value;
			this.dispatchEvent({'type': 'show_annotations_changed', 'viewer': this});
		}
	}

	getShowAnnotations () {
		return this.showAnnotations;
	}
	
	setDEMCollisionsEnabled(value){
		if(this.useDEMCollisions !== value){
			this.useDEMCollisions = value;
			this.dispatchEvent({'type': 'use_demcollisions_changed', 'viewer': this});
		};
	};

	getDEMCollisionsEnabled () {
		return this.useDEMCollisions;
	};

	setEDLEnabled (value) {
		value = Boolean(value) && Features.SHADER_EDL.isSupported();
        
		if (this.useEDL !== value) {
			this.useEDL = value;
			this.dispatchEvent({'type': 'use_edl_changed', 'viewer': this});
            this.dispatchEvent('pointcloud_changed')  
		}
	};

	getEDLEnabled () {
		return this.useEDL;
	};

	setEDLRadius (value) {
		if (this.edlRadius !== value) {
			this.edlRadius = value;
			this.dispatchEvent({'type': 'edl_radius_changed', 'viewer': this});
            this.dispatchEvent('pointcloud_changed')
		}
	};

	getEDLRadius () {
		return this.edlRadius;
	};

	setEDLStrength (value) {
		if (this.edlStrength !== value) {
			this.edlStrength = value;
			this.dispatchEvent({'type': 'edl_strength_changed', 'viewer': this});
            this.dispatchEvent('pointcloud_changed')
		}
	};

	getEDLStrength () {
		return this.edlStrength;
	};

	setEDLOpacity (value) {
		if (this.edlOpacity !== value) {
			this.edlOpacity = value;
			this.dispatchEvent({'type': 'edl_opacity_changed', 'viewer': this});
            this.dispatchEvent('pointcloud_changed')
		}
	};

	getEDLOpacity () {
		return this.edlOpacity;
	};

	setFOV (value) {
		if (this.fov !== value) {
            let oldFov = this.fov
			this.fov = value;
            this.scene.cameraP.fov = this.fov;  //add
            this.scene.cameraP.updateProjectionMatrix() //add
			this.dispatchEvent({'type': 'fov_changed', 'viewer': this,  oldFov, fov:this.fov});
		}
	};

	getFOV () {
		return this.fov;
	};

	disableAnnotations () {
		this.scene.annotations.traverse(annotation => {
			annotation.domElement.css('pointer-events', 'none');

			// return annotation.visible;
		});
	};

	enableAnnotations () {
		this.scene.annotations.traverse(annotation => {
			annotation.domElement.css('pointer-events', 'auto');

			// return annotation.visible;
		});
	}

	setClassifications(classifications){
		this.classifications = classifications;

		this.dispatchEvent({'type': 'classifications_changed', 'viewer': this});
	}

	setClassificationVisibility (key, value) {
		if (!this.classifications[key]) {
			this.classifications[key] = {visible: value, name: 'no name'};
			this.dispatchEvent({'type': 'classification_visibility_changed', 'viewer': this});
		} else if (this.classifications[key].visible !== value) {
			this.classifications[key].visible = value;
			this.dispatchEvent({'type': 'classification_visibility_changed', 'viewer': this});
		}
	}

	toggleAllClassificationsVisibility(){

		let numVisible = 0;
		let numItems = 0;
		for(const key of Object.keys(this.classifications)){
			if(this.classifications[key].visible){
				numVisible++;
			}
			numItems++;
		}

		let visible = true;
		if(numVisible === numItems){
			visible = false;
		}

		let somethingChanged = false;

		for(const key of Object.keys(this.classifications)){
			if(this.classifications[key].visible !== visible){
				this.classifications[key].visible = visible;
				somethingChanged = true;
			}
		}

		if(somethingChanged){
			this.dispatchEvent({'type': 'classification_visibility_changed', 'viewer': this});
		}
	}

	setFilterReturnNumberRange(from, to){
		this.filterReturnNumberRange = [from, to];
		this.dispatchEvent({'type': 'filter_return_number_range_changed', 'viewer': this});
	}

	setFilterNumberOfReturnsRange(from, to){
		this.filterNumberOfReturnsRange = [from, to];
		this.dispatchEvent({'type': 'filter_number_of_returns_range_changed', 'viewer': this});
	}

	setFilterGPSTimeRange(from, to){
		this.filterGPSTimeRange = [from, to];
		this.dispatchEvent({'type': 'filter_gps_time_range_changed', 'viewer': this});
	}

	setFilterPointSourceIDRange(from, to){
		this.filterPointSourceIDRange = [from, to]
		this.dispatchEvent({'type': 'filter_point_source_id_range_changed', 'viewer': this});
	}

	setLengthUnit (value) {
		switch (value) {
			case 'm':
				this.lengthUnit = LengthUnits.METER;
				this.lengthUnitDisplay = LengthUnits.METER;
				break;
			case 'ft':
				this.lengthUnit = LengthUnits.FEET;
				this.lengthUnitDisplay = LengthUnits.FEET;
				break;
			case 'in':
				this.lengthUnit = LengthUnits.INCH;
				this.lengthUnitDisplay = LengthUnits.INCH;
				break;
		}

		this.dispatchEvent({ 'type': 'length_unit_changed', 'viewer': this, value: value});
	};

	setLengthUnitAndDisplayUnit(lengthUnitValue, lengthUnitDisplayValue) {
		switch (lengthUnitValue) {
			case 'm':
				this.lengthUnit = LengthUnits.METER;
				break;
			case 'ft':
				this.lengthUnit = LengthUnits.FEET;
				break;
			case 'in':
				this.lengthUnit = LengthUnits.INCH;
				break;
		}

		switch (lengthUnitDisplayValue) {
			case 'm':
				this.lengthUnitDisplay = LengthUnits.METER;
				break;
			case 'ft':
				this.lengthUnitDisplay = LengthUnits.FEET;
				break;
			case 'in':
				this.lengthUnitDisplay = LengthUnits.INCH;
				break;
		}

		this.dispatchEvent({ 'type': 'length_unit_changed', 'viewer': this, value: lengthUnitValue });
	};

	zoomTo(node, factor, animationDuration = 0){
		let view = this.mainViewport.view;

		let camera = this.scene.cameraP.clone();
		camera.rotation.copy(this.scene.cameraP.rotation);
		camera.rotation.order = "ZXY";
		camera.rotation.x = Math.PI / 2 + view.pitch;
		camera.rotation.z = view.yaw;
		camera.updateMatrix();
		camera.updateMatrixWorld();
		camera.zoomTo(node, factor);

		let bs;
		if (node.boundingSphere) {
			bs = node.boundingSphere;
		} else if (node.geometry && node.geometry.boundingSphere) {
			bs = node.geometry.boundingSphere;
		} else {
			bs = node.boundingBox.getBoundingSphere(new THREE.Sphere());
		}
		bs = bs.clone().applyMatrix4(node.matrixWorld); 

		let startPosition = view.position.clone();
		let endPosition = camera.position.clone();
		let startTarget = view.getPivot();
		let endTarget = bs.center;
		let startRadius = view.radius;
		let endRadius = endPosition.distanceTo(endTarget);

		let easing = TWEEN.Easing.Quartic.Out;

		{ // animate camera position
			let pos = startPosition.clone();
			let tween = new TWEEN.Tween(pos).to(endPosition, animationDuration);
			tween.easing(easing);

			tween.onUpdate(() => {
				view.position.copy(pos);
			});

			tween.start();
		}

		{ // animate camera target
			let target = startTarget.clone();
			let tween = new TWEEN.Tween(target).to(endTarget, animationDuration);
			tween.easing(easing);
			tween.onUpdate(() => {
				view.lookAt(target);
			});
			tween.onComplete(() => {
				view.lookAt(target);
				this.dispatchEvent({type: 'focusing_finished', target: this});
			});

			this.dispatchEvent({type: 'focusing_started', target: this});
			tween.start();
		}
	};

	moveToGpsTimeVicinity(time){
		const result = Potree.Utils.findClosestGpsTime(time, viewer);

		const box  = result.node.pointcloud.deepestNodeAt(result.position).getBoundingBox();
		const diameter = box.min.distanceTo(box.max);

		const camera = this.scene.getActiveCamera();
		const offset = camera.getWorldDirection(new THREE.Vector3()).multiplyScalar(diameter);
		const newCamPos = result.position.clone().sub(offset);

		this.scene.view.position.copy(newCamPos);
		this.scene.view.lookAt(result.position);
	}

	showAbout () {
		$(function () {
			$('#about-panel').dialog();
		});
	};

	
	getGpsTimeExtent(){
		const range = [Infinity, -Infinity];

		for(const pointcloud of this.scene.pointclouds){
			const attributes = pointcloud.pcoGeometry.pointAttributes.attributes;
			const aGpsTime = attributes.find(a => a.name === "gps-time");

			if(aGpsTime){
				range[0] = Math.min(range[0], aGpsTime.range[0]);
				range[1] = Math.max(range[1], aGpsTime.range[1]);
			}
		}

		return range;
	}

	fitToScreen (factor = 1, animationDuration = 0) {
		let box = this.getBoundingBox(this.scene.pointclouds);

		let node = new THREE.Object3D();
		node.boundingBox = box;

		this.zoomTo(node, factor, animationDuration);
		this.controls.stop();
	};

	toggleNavigationCube() {
		this.navigationCube.visible = !this.navigationCube.visible;
        
        /* this.viewports.push({
            name:'navigationCube',
            left:0, bottom:0, width:0.2,
            
        }) */
        
        
	}

	/* setView(pos, view) {
		if(!pos) return;
    
		switch(pos) {
			case "F":
				this.setFrontView(view);
				break;
			case "B":
				this.setBackView(view);
				break;
			case "L":
				this.setLeftView(view);
				break;
			case "R":
				this.setRightView(view);
				break;
			case "U":
				this.setTopView(view);
				break;
			case "D":
				this.setBottomView(view);
				break;
		}
	} */
	
	setTopView(view){
        view = view || this.scene.view
		view.setCubeView("top")

		this.fitToScreen();
	};
	
	setBottomView(){
		this.scene.view.yaw = -Math.PI;
		this.scene.view.pitch = Math.PI / 2;
		
		this.fitToScreen();
	};

	setFrontView(view){
        view = view || this.scene.view 
		view.yaw = 0;
		view.pitch = 0;

		this.fitToScreen();
	};
	
	setBackView(view){
        view = view || this.scene.view 
		view.yaw = Math.PI;
		view.pitch = 0;
		
		this.fitToScreen();
	};

	setLeftView(){
		this.scene.view.yaw = -Math.PI / 2;
		this.scene.view.pitch = 0;

		this.fitToScreen();
	};

	setRightView () {
		this.scene.view.yaw = Math.PI / 2;
		this.scene.view.pitch = 0;

		this.fitToScreen();
	};

	flipYZ () {
		this.isFlipYZ = !this.isFlipYZ;

		// TODO flipyz
		console.log('TODO');
	}
	
	setCameraMode(mode){
		this.scene.cameraMode = mode;
        viewer.mainViewport.camera = mode == CameraMode.PERSPECTIVE ? this.scene.cameraP : this.scene.cameraO; //改
         
		for(let pointcloud of this.scene.pointclouds) {
			pointcloud.material.useOrthographicCamera = mode == CameraMode.ORTHOGRAPHIC;
		}
	}

	getProjection(){
		const pointcloud = this.scene.pointclouds[0];

		if(pointcloud){
			return pointcloud.projection;
		}else{
			return null;
		}
	}

	async loadProject(url,done){

		const response = await fetch(url);
        if(response.ok){
            const text = await response.text();
            const json = JSON5.parse(text);
            // const json = JSON.parse(text);

            if(json.type === "Potree"){
                Potree.loadProject(viewer, json, done);
            }
            
        }else{
            console.warn("未能加载："+url )
        }
            
	}

	saveProject(){
		return Potree.saveProject(this);
	}
	
	loadSettingsFromURL(){
		if(Utils.getParameterByName("pointSize")){
			this.setPointSize(parseFloat(Utils.getParameterByName("pointSize")));
		}
		
		if(Utils.getParameterByName("FOV")){
			this.setFOV(parseFloat(Utils.getParameterByName("FOV")));
		}
		
		if(Utils.getParameterByName("opacity")){
			this.setOpacity(parseFloat(Utils.getParameterByName("opacity")));
		}
		
		if(Utils.getParameterByName("edlEnabled")){
			let enabled = Utils.getParameterByName("edlEnabled") === "true";
			this.setEDLEnabled(enabled);
		}

		if (Utils.getParameterByName('edlRadius')) {
			this.setEDLRadius(parseFloat(Utils.getParameterByName('edlRadius')));
		}

		if (Utils.getParameterByName('edlStrength')) {
			this.setEDLStrength(parseFloat(Utils.getParameterByName('edlStrength')));
		}

		if (Utils.getParameterByName('pointBudget')) {
			this.setPointBudget(parseFloat(Utils.getParameterByName('pointBudget')));
		}

		if (Utils.getParameterByName('showBoundingBox')) {
			let enabled = Utils.getParameterByName('showBoundingBox') === 'true';
			if (enabled) {
				this.setShowBoundingBox(true);
			} else {
				this.setShowBoundingBox(false);
			}
		}

		if (Utils.getParameterByName('material')) {
			let material = Utils.getParameterByName('material');
			this.setMaterial(material);
		}

		if (Utils.getParameterByName('pointSizing')) {
			let sizing = Utils.getParameterByName('pointSizing');
			this.setPointSizing(sizing);
		}

		if (Utils.getParameterByName('quality')) {
			let quality = Utils.getParameterByName('quality');
			this.setQuality(quality);
		}

		if (Utils.getParameterByName('position')) {
			let value = Utils.getParameterByName('position');
			value = value.replace('[', '').replace(']', '');
			let tokens = value.split(';');
			let x = parseFloat(tokens[0]);
			let y = parseFloat(tokens[1]);
			let z = parseFloat(tokens[2]);

			this.scene.view.position.set(x, y, z);
		}

		if (Utils.getParameterByName('target')) {
			let value = Utils.getParameterByName('target');
			value = value.replace('[', '').replace(']', '');
			let tokens = value.split(';');
			let x = parseFloat(tokens[0]);
			let y = parseFloat(tokens[1]);
			let z = parseFloat(tokens[2]);

			this.scene.view.lookAt(new THREE.Vector3(x, y, z));
		}

		if (Utils.getParameterByName('background')) {
			let value = Utils.getParameterByName('background');
			this.setBackground(value);
		}

		// if(Utils.getParameterByName("elevationRange")){
		//	let value = Utils.getParameterByName("elevationRange");
		//	value = value.replace("[", "").replace("]", "");
		//	let tokens = value.split(";");
		//	let x = parseFloat(tokens[0]);
		//	let y = parseFloat(tokens[1]);
		//
		//	this.setElevationRange(x, y);
		//	//this.scene.view.target.set(x, y, z);
		// }
	};

	// ------------------------------------------------------------------------------------
	// Viewer Internals
	// ------------------------------------------------------------------------------------

	createControls () {
		{ // create FIRST PERSON CONTROLS
			this.fpControls = new FirstPersonControls(this, this.mainViewport);
			this.fpControls.enabled = false;
			this.fpControls.addEventListener('start', this.disableAnnotations.bind(this));
			this.fpControls.addEventListener('end', this.enableAnnotations.bind(this));
            /* this.addEventListener("loadPointCloudDone",  ()=>{
                let boundPlane = new THREE.Box3()
                boundPlane.expandByPoint(this.bound.boundingBox.min.clone())//最低高度为bound的最低
                boundPlane.expandByPoint(this.bound.boundingBox.max.clone().setZ(this.bound.center.z))//最高高度为bound的中心高度
                FirstPersonControls.boundPlane = boundPlane
                FirstPersonControls.standardSpeed = THREE.Math.clamp( Math.sqrt(this.bound.boundSize.length() )/ 100 ,   0.02,0.5); //在这个boundPlane中的速度
            }) */
        
		}

		// { // create GEO CONTROLS
		//	this.geoControls = new GeoControls(this.scene.camera, this.renderer.domElement);
		//	this.geoControls.enabled = false;
		//	this.geoControls.addEventListener("start", this.disableAnnotations.bind(this));
		//	this.geoControls.addEventListener("end", this.enableAnnotations.bind(this));
		//	this.geoControls.addEventListener("move_speed_changed", (event) => {
		//		this.setMoveSpeed(this.geoControls.moveSpeed);
		//	});
		// }

		{ // create ORBIT CONTROLS
			this.orbitControls = new OrbitControls(this);
			this.orbitControls.enabled = false;
			this.orbitControls.addEventListener('start', this.disableAnnotations.bind(this));
			this.orbitControls.addEventListener('end', this.enableAnnotations.bind(this));
		}

		/* { // create EARTH CONTROLS
			this.earthControls = new EarthControls(this);
			this.earthControls.enabled = false;
			this.earthControls.addEventListener('start', this.disableAnnotations.bind(this));
			this.earthControls.addEventListener('end', this.enableAnnotations.bind(this));
		}

		{ // create DEVICE ORIENTATION CONTROLS
			this.deviceControls = new DeviceOrientationControls(this);
			this.deviceControls.enabled = false;
			this.deviceControls.addEventListener('start', this.disableAnnotations.bind(this));
			this.deviceControls.addEventListener('end', this.enableAnnotations.bind(this));
		} */

		/* { // create VR CONTROLS
			this.vrControls = new VRControls(this);
			this.vrControls.enabled = false;
			this.vrControls.addEventListener('start', this.disableAnnotations.bind(this));
			this.vrControls.addEventListener('end', this.enableAnnotations.bind(this));
		}  */


	};

	toggleSidebar () {
		let renderArea = $('#potree_render_area');
		let isVisible = renderArea.css('left') !== '0px';

		if (isVisible) {
			renderArea.css('left', '0px');
		} else {
			renderArea.css('left', '300px');
		}
	};

	toggleMap () {
		// let map = $('#potree_map');
		// map.toggle(100);

		if (this.mapView) {
			this.mapView.toggle();
		}
	};

	onGUILoaded(callback){
		if(this.guiLoaded){
			callback();
		}else{
			this.guiLoadTasks.push(callback);
		}
	}

	promiseGuiLoaded(){
		return new Promise( resolve => {

			if(this.guiLoaded){
				resolve();
			}else{
				this.guiLoadTasks.push(resolve);
			}
		
		});
	}

	loadGUI(callback){
        
		if(callback){
			this.onGUILoaded(callback);
		}

		let viewer = this;
		let sidebarContainer = $('#potree_sidebar_container');
		sidebarContainer.load(new URL(Potree.scriptPath + '/' + (Potree.settings.sidebar || 'sidebar1.html')).href, () => {
			sidebarContainer.css('width', '300px');
			sidebarContainer.css('height', '100%');

			let imgMenuToggle = document.createElement('img');
			imgMenuToggle.src = new URL(Potree.resourcePath + '/icons/menu_button.svg').href;
			imgMenuToggle.onclick = this.toggleSidebar;
			imgMenuToggle.classList.add('potree_menu_toggle');

			let imgMapToggle = document.createElement('img');
			imgMapToggle.src = new URL(Potree.resourcePath + '/icons/map_icon.png').href;
			imgMapToggle.style.display = 'none';
			imgMapToggle.onclick = e => { this.toggleMap(); };
			imgMapToggle.id = 'potree_map_toggle';

			

			let elButtons = $("#potree_quick_buttons").get(0);

			elButtons.append(imgMenuToggle);
			elButtons.append(imgMapToggle);

            
			VRButton.createButton(this.renderer).then(vrButton => {

				if(vrButton == null){
					console.log("VR not supported or active.");

					return;
				}

				this.renderer.xr.enabled = true;

				let element = vrButton.element;

				element.style.position = "";
				element.style.bottom = "";
				element.style.left = "";
				element.style.margin = "4px";
				element.style.fontSize = "100%";
				element.style.width = "2.5em";
				element.style.height = "2.5em";
				element.style.padding = "0";
				element.style.textShadow = "black 2px 2px 2px";
				element.style.display = "block";

				elButtons.append(element);

				vrButton.onStart(() => {
					this.dispatchEvent({type: "vr_start"});
				});

				vrButton.onEnd(() => {
					this.dispatchEvent({type: "vr_end"});
				});
			});
  
            /* this.mapView = new MapView(this);
			this.mapView.init();  */
 
			i18n.init({
				lng: 'en',
				resGetPath: Potree.resourcePath + '/lang/__lng__/__ns__.json',
				preload: ['en', 'fr', 'de', 'jp', 'se', 'es', 'zh'],
				getAsync: true,
				debug: false
			}, function (t) {
				// Start translation once everything is loaded
				$('body').i18n();
			});

			$(() => {
				//initSidebar(this);
				let sidebar = new Sidebar(this);
				sidebar.init();

				this.sidebar = sidebar;

				//if (callback) {
				//	$(callback);
				//}

				let elProfile = $('<div>').load(new URL(Potree.scriptPath + '/profile.html').href, () => {
					$(document.body).append(elProfile.children());
					this.profileWindow = new ProfileWindow(this);
					this.profileWindowController = new ProfileWindowController(this);

					$('#profile_window').draggable({
						handle: $('#profile_titlebar'),
						containment: $(document.body)
					});
					$('#profile_window').resizable({
						containment: $(document.body),
						handles: 'n, e, s, w'
					});

					$(() => {
						this.guiLoaded = true;
						for(let task of this.guiLoadTasks){
							task();
						}

					});
				});

				

			});

			
		});

		return this.promiseGuiLoaded();
	}

	setLanguage (lang) {
		i18n.setLng(lang);
		$('body').i18n();
	}

	setServer (server) {
		this.server = server;
	}

	initDragAndDrop(){
		function allowDrag(e) {
			e.dataTransfer.dropEffect = 'copy';
			e.preventDefault();
		}

		let dropHandler = async (event) => {
			console.log(event);
			event.preventDefault();

			for(const item of event.dataTransfer.items){
				console.log(item);

				if(item.kind !== "file"){
					continue;
				}

				const file = item.getAsFile();

				const isJson = file.name.toLowerCase().endsWith(".json");
				const isGeoPackage = file.name.toLowerCase().endsWith(".gpkg");

				if(isJson){
					try{

						const text = await file.text();
						const json = JSON.parse(text);

						if(json.type === "Potree"){
							Potree.loadProject(viewer, json);
						}
					}catch(e){
						console.error("failed to parse the dropped file as JSON");
						console.error(e);
					}
				}else if(isGeoPackage){
					const hasPointcloud = viewer.scene.pointclouds.length > 0;

					if(!hasPointcloud){
						let msg = "At least one point cloud is needed that specifies the ";
						msg += "coordinate reference system before loading vector data.";
						console.error(msg);
					}else{

						proj4.defs("WGS84", "+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs");
						proj4.defs("pointcloud", this.getProjection());
						let transform = proj4("WGS84", "pointcloud");

						const buffer = await file.arrayBuffer();

						const params = {
							transform: transform,
							source: file.name,
						};
						
						const geo = await Potree.GeoPackageLoader.loadBuffer(buffer, params);
						viewer.scene.addGeopackage(geo);
					}
				}
				
			}
		};


		$("body")[0].addEventListener("dragenter", allowDrag);
		$("body")[0].addEventListener("dragover", allowDrag);
		$("body")[0].addEventListener("drop", dropHandler);
	}

	 
		
	 

	updateAnnotations () {

		if(!this.visibleAnnotations){
			this.visibleAnnotations = new Set();
		}

		this.scene.annotations.updateBounds();
		this.scene.cameraP.updateMatrixWorld();
		this.scene.cameraO.updateMatrixWorld();
		
		let distances = [];

		let renderAreaSize = this.renderer.getSize(new THREE.Vector2());

		let viewer = this;

		let visibleNow = [];
		this.scene.annotations.traverse(annotation => {

			if (annotation === this.scene.annotations) {
				return true;
			}

			if (!annotation.visible) {
				return false;
			}

			annotation.scene = this.scene;

			let element = annotation.domElement;

			let position = annotation.position.clone();
			position.add(annotation.offset);
			if (!position) {
				position = annotation.boundingBox.getCenter(new THREE.Vector3());
			}

			let distance = viewer.scene.cameraP.position.distanceTo(position);
			let radius = annotation.boundingBox.getBoundingSphere(new THREE.Sphere()).radius;

			let screenPos = new THREE.Vector3();
			let screenSize = 0;

			{
				// SCREEN POS
				screenPos.copy(position).project(this.scene.getActiveCamera());
				screenPos.x = renderAreaSize.x * (screenPos.x + 1) / 2;
				screenPos.y = renderAreaSize.y * (1 - (screenPos.y + 1) / 2);


				// SCREEN SIZE
				if(viewer.scene.cameraMode == CameraMode.PERSPECTIVE) {
					let fov = Math.PI * viewer.scene.cameraP.fov / 180;
					let slope = Math.tan(fov / 2.0);
					let projFactor =  0.5 * renderAreaSize.y / (slope * distance);
					screenSize = radius * projFactor;
				} else {
					screenSize = Utils.projectedRadiusOrtho(radius, viewer.scene.cameraO.projectionMatrix, renderAreaSize.x, renderAreaSize.y);
				}
			}

			element.css("left", screenPos.x + "px");
			element.css("top", screenPos.y + "px");
			//element.css("display", "block");

			let zIndex = 10000000 - distance * (10000000 / this.scene.cameraP.far);
			if(annotation.descriptionVisible){
				zIndex += 10000000;
			}
			element.css("z-index", parseInt(zIndex));

			if(annotation.children.length > 0){
				let expand = screenSize > annotation.collapseThreshold || annotation.boundingBox.containsPoint(this.scene.getActiveCamera().position);
				annotation.expand = expand;

				if (!expand) {
					//annotation.display = (screenPos.z >= -1 && screenPos.z <= 1);
					let inFrustum = (screenPos.z >= -1 && screenPos.z <= 1);
					if(inFrustum){
						visibleNow.push(annotation);
					}
				}

				return expand;
			} else {
				//annotation.display = (screenPos.z >= -1 && screenPos.z <= 1);
				let inFrustum = (screenPos.z >= -1 && screenPos.z <= 1);
				if(inFrustum){
					visibleNow.push(annotation);
				}
			}
			
		});

		let notVisibleAnymore = new Set(this.visibleAnnotations);
		for(let annotation of visibleNow){
			annotation.display = true;
			
			notVisibleAnymore.delete(annotation);
		}
		this.visibleAnnotations = visibleNow;

		for(let annotation of notVisibleAnymore){
			annotation.display = false;
		}

	}

	updateMaterialDefaults(pointcloud){
		// PROBLEM STATEMENT:
		// * [min, max] of intensity, source id, etc. are computed as point clouds are loaded
		// * the point cloud material won't know the range it should use until some data is loaded
		// * users can modify the range at runtime, but sensible default ranges should be 
		//   applied even if no GUI is present
		// * display ranges shouldn't suddenly change even if the actual range changes over time.
		//   e.g. the root node has intensity range [1, 478]. One of the descendants increases range to 
		//   [0, 2047]. We should not automatically change to the new range because that would result
		//   in sudden and drastic changes of brightness. We should adjust the min/max of the sidebar slider.

		const material = pointcloud.material;

		const attIntensity = pointcloud.getAttribute("intensity");
		
		if(attIntensity != null && material.intensityRange[0] === Infinity){
			material.intensityRange = [...attIntensity.range];
		}

		// const attIntensity = pointcloud.getAttribute("intensity");
		// if(attIntensity && material.intensityRange[0] === Infinity){
		// 	material.intensityRange = [...attIntensity.range];
		// }

		// let attributes = pointcloud.getAttributes();

		// for(let attribute of attributes.attributes){
		// 	if(attribute.range){
		// 		let range = [...attribute.range];
		// 		material.computedRange.set(attribute.name, range);
		// 		//material.setRange(attribute.name, range);
		// 	}
		// }


	}

	update(delta, timestamp){
        
		viewer.addTimeMark('update','start')
        TWEEN.update(timestamp);
        transitions.update(delta);//写在开头，因为这时候最为固定，计时准确
        
        
        
		this.dispatchEvent({
			type: 'update_start',
			delta: delta,
			timestamp: timestamp});
            
        
        this.updateScreenSize() //判断是否改变canvas大小
         
		
		const scene = this.scene;
		const camera = scene.getActiveCamera();
		const visiblePointClouds = this.scene.pointclouds.filter(pc => pc.visible)
		
		Potree.pointLoadLimit = Potree.pointBudget * 2;

		/* const lTarget = camera.position.clone().add(camera.getWorldDirection(new THREE.Vector3()).multiplyScalar(1000));
		this.scene.directionalLight.position.copy(camera.position);
		this.scene.directionalLight.lookAt(lTarget); */
        
        
		for (let pointcloud of visiblePointClouds) {

			pointcloud.showBoundingBox = this.showBoundingBox;
			pointcloud.generateDEM = this.generateDEM;
			pointcloud.minimumNodePixelSize = this.minNodeSize;

			let material = pointcloud.material;

			material.uniforms.uFilterReturnNumberRange.value = this.filterReturnNumberRange;
			material.uniforms.uFilterNumberOfReturnsRange.value = this.filterNumberOfReturnsRange;
			material.uniforms.uFilterGPSTimeClipRange.value = this.filterGPSTimeRange;
			material.uniforms.uFilterPointSourceIDClipRange.value = this.filterPointSourceIDRange;

			material.classification = this.classifications;
			material.recomputeClassification();

			this.updateMaterialDefaults(pointcloud);
		}
 


		{
			if(this.showBoundingBox){
				let bbRoot = this.scene.scene.getObjectByName("potree_bounding_box_root");
				if(!bbRoot){
					let node = new THREE.Object3D();
					node.name = "potree_bounding_box_root";
					this.scene.scene.add(node);
					bbRoot = node;
				}

				let visibleBoxes = [];
				for(let pointcloud of this.scene.pointclouds){
					for(let node of pointcloud.visibleNodes.filter(vn => vn.boundingBoxNode !== undefined)){
						let box = node.boundingBoxNode;
						visibleBoxes.push(box);
					}
				}

				bbRoot.children = visibleBoxes;
			}
		}
        
        
        if(this.boundNeedUpdate)this.updateModelBound()  //add


	
		this.scene.cameraP.fov = this.fov;
		
		let controls = this.getControls();
		if (controls === this.deviceControls) {
			this.controls.setScene(scene);
			this.controls.update(delta);

			this.scene.cameraP.position.copy(scene.view.position);
			this.scene.cameraO.position.copy(scene.view.position);
		} else if (controls !== null) {
			controls.setScene(scene);
			controls.update(delta);
        
            //更新camera
            this.viewports.forEach(viewport=>{
                if(!viewport.active)return
                viewport.view.applyToCamera(viewport.camera)  
                  
            }) 
		}
		 
        
        this.lastFrameChanged = this.cameraChanged()//判断camera画面是否改变
       

		{ // update clip boxes 
             
			let boxes = [];
			
			// volumes with clipping enabled 
			boxes.push(...this.scene.volumes.filter(v => (v.clip && v instanceof BoxVolume)));

			// profile segments
			for(let profile of this.scene.profiles){
				boxes.push(...profile.boxes);
			}
			
			// Needed for .getInverse(), pre-empt a determinant of 0, see #815 / #816
			let degenerate = (box) => box.matrixWorld.determinant() !== 0 && box.clip;
			
			let clipBoxes = boxes.filter(degenerate).map( box => {
				box.updateMatrixWorld();
				
				let boxInverse = box.matrixWorld.clone().invert();
				//let boxPosition = box.getWorldPosition(new THREE.Vector3());

				return {box: box, inverse: boxInverse/* , position: boxPosition */};
			});
            //改
            let bigClipInBox = clipBoxes.find(e=>e.box.clipTask == ClipTask.SHOW_INSIDE_Big && !e.box.highlight)//裁剪下载 when this.modules.Clip.editing
            let clipBoxes_in = clipBoxes.filter(e=>e.box.clipTask == ClipTask.SHOW_INSIDE && !e.box.highlight)
            let clipBoxes_out = clipBoxes.filter(e=>e.box.clipTask == ClipTask.SHOW_OUTSIDE && !e.box.highlight)
            let highlightBoxes = clipBoxes.filter(e=>e.box.highlight )
			//let prismPolygons = this.modules.volumeComputer && this.modules.volumeComputer.entered ? viewer.scene.measurements.filter(e=>(e.measureType == 'MulDistance Ring') && !e.isNew) : []
			let prismPolygons = this.modules.volumeComputer ? this.modules.volumeComputer.prisms.filter(e=>!e.isNew && e.visible && !e.dontHighlight && (e.baseModel || !e.modelHaventLoad)) : []
            
            // set clip volumes in material
			for(let pointcloud of visiblePointClouds){
				pointcloud.material.setClipBoxes(bigClipInBox, clipBoxes_in, clipBoxes_out, highlightBoxes, prismPolygons);  
			}
		}  

		{
			for(let pointcloud of visiblePointClouds){
				pointcloud.material.elevationGradientRepeat = this.elevationGradientRepeat;
			}
		}
		
		{ // update navigation cube
			this.navigationCube.update(camera.rotation);
		}

		this.updateAnnotations();

        
		if(this.mapView){
			this.mapView.update(delta);
			if(this.mapView.sceneProjection){
				$( "#potree_map_toggle" ).css("display", "block");
				
			}
		}

		
        this.transformationTool.update();
        
 	
        if(Potree.settings.editType != 'pano' && Potree.settings.editType != 'merge'){
            this.modules.ParticleEditor.update(delta)  
        }
        this.mapViewer && this.mapViewer.update(delta)     //地图更新
        
		this.dispatchEvent({ type: 'update', delta: delta, timestamp: timestamp});  //在有sidebar时耗高cpu，占本update函数80%
         
		 
        viewer.addTimeMark('update','end')
        //add ------
        this.reticule.updateVisible() 
    

	}

 

 

    updateViewPointcloud(camera, areaSize, isViewport){
        
 
        let result = Potree.updatePointClouds(this.scene.pointclouds,  camera, areaSize );

 

        //if(isViewport)return
        const tStart = performance.now();
        const campos = camera.position;
        let closestImage = Infinity;
        for(const images of this.scene.orientedImages){
            for(const image of images.images){
                const distance = image.mesh.position.distanceTo(campos);

                closestImage = Math.min(closestImage, distance);
            }
        }
        //const tEnd = performance.now();


        //改：不根据点云修改视野near far
        var near = camera.near, far = camera.far
        
        if(!camera.limitFar && result.lowestSpacing !== Infinity){
            
            //let near = result.lowestSpacing * 10.0;
            let far = -this.getBoundingBox().applyMatrix4(camera.matrixWorldInverse).min.z;

            far = Math.max(far * 1.5, 10000);
            //near = Math.min(100.0, Math.max(0.01, near));
            //near = Math.min(near, closestImage);
            far = Math.max(far, near + 10000);

            /* if(near === Infinity){
                near = 0.1;
            } */
            
            //camera.near = near;  //为了其他物体的显示，不修改near
            camera.far = far;
        }  

        /* if(this.scene.cameraMode == CameraMode.ORTHOGRAPHIC) {//???
            camera.near = -camera.far;
        } */
        if(/* near != camera.near ||  */far != camera.far){
            camera.updateProjectionMatrix()
        }  
         
        //注：pointcloud.visibleNodes会随着near far自动更新
    }



    
    
     

	getPRenderer(){
		if(this.useHQ){
			if (!this.hqRenderer) {
				this.hqRenderer = new HQSplatRenderer(this);
			}
			this.hqRenderer.useEDL = this.useEDL;

			return this.hqRenderer;
		}else{
			/* if (this.useEDL && Features.SHADER_EDL.isSupported()) {
				if (!this.edlRenderer) {
					this.edlRenderer = new EDLRenderer(this);
				}

				return this.edlRenderer;
			} else {
				if (!this.potreeRenderer) {
					this.potreeRenderer = new PotreeRenderer(this);
				}

				return this.potreeRenderer;
			} */
            
            if (!this.edlRenderer) {
                this.edlRenderer = new EDLRenderer(this);
            }

            return this.edlRenderer;
            
		}
	}

	renderVR(){//渲染部分没改完

		let renderer = this.renderer;

		renderer.setClearColor(0x550000, 0);
		renderer.clear();

		let xr = renderer.xr;
		let dbg = new THREE.PerspectiveCamera();
		let xrCameras = xr.getCamera(dbg);

		if(xrCameras.cameras.length !== 2){
			return;
		}

		let makeCam = this.vrControls.getCamera.bind(this.vrControls);

		{ // clear framebuffer
			if(viewer.background === "skybox"){
				renderer.setClearColor(0xff0000, 1);
			}else if(viewer.background === "gradient"){
				renderer.setClearColor(0x112233, 1);
			}else if(viewer.background === "black"){
				renderer.setClearColor(0x000000, 1);
			}else if(viewer.background === "white"){
				renderer.setClearColor(0xFFFFFF, 1);
			}else{
				renderer.setClearColor(0x000000, 0);
			}

			renderer.clear();
		}

		// render background
		if(this.background === "skybox"){
			let {skybox} = this;

			let cam = makeCam();
			skybox.camera.rotation.copy(cam.rotation);
			skybox.camera.fov = cam.fov;
			skybox.camera.aspect = cam.aspect;
			
			// let dbg = new THREE.Object3D();
			let dbg = skybox.parent;
			// dbg.up.set(0, 0, 1);
			dbg.rotation.x = Math.PI / 2;

			// skybox.camera.parent = dbg;
			// dbg.children.push(skybox.camera);

			dbg.updateMatrix();
			dbg.updateMatrixWorld();

			skybox.camera.updateMatrix();
			skybox.camera.updateMatrixWorld();
			skybox.camera.updateProjectionMatrix();

			renderer.render(skybox.scene, skybox.camera);
			// renderer.render(skybox.scene, cam);
		}else if(this.background === "gradient"){
			// renderer.render(this.scene.sceneBG, this.scene.cameraBG);
		}

		this.renderer.xr.getSession().updateRenderState({
			depthNear: 0.1,
			depthFar: 10000
		});
		
		let cam = null;
		let view = null;

		{ // render world scene
			cam = makeCam();
			cam.position.z -= 0.8 * cam.scale.x;
			cam.parent = null;
			// cam.near = 0.05;
			cam.near = viewer.scene.getActiveCamera().near;
			cam.far = viewer.scene.getActiveCamera().far;
			cam.updateMatrix();
			cam.updateMatrixWorld();

			this.scene.scene.updateMatrix();
			this.scene.scene.updateMatrixWorld();
			this.scene.scene.matrixAutoUpdate = false;

			let camWorld = cam.matrixWorld.clone();
			view = camWorld.clone().invert();
			this.scene.scene.matrix.copy(view);
			this.scene.scene.matrixWorld.copy(view);

			cam.matrix.identity();
			cam.matrixWorld.identity();
			cam.matrixWorldInverse.identity();

			renderer.render(this.scene.scene, cam);

			this.scene.scene.matrixWorld.identity();

		}
		
		for(let pointcloud of this.scene.pointclouds){

			let viewport = xrCameras.cameras[0].viewport;

			pointcloud.material.useEDL = false;
			pointcloud.screenHeight = viewport.height;
			pointcloud.screenWidth = viewport.width;

			// automatically switch to paraboloids because they cause far less flickering in VR, 
			// when point sizes are larger than around 2 pixels
			// if(Features.SHADER_INTERPOLATION.isSupported()){
			// 	pointcloud.material.shape = Potree.PointShape.PARABOLOID;
			// }
		}
		
		// render point clouds
		for(let xrCamera of xrCameras.cameras){

			let v = xrCamera.viewport;
			renderer.setViewport(v.x, v.y, v.width, v.height);

			// xrCamera.fov = 90;

			{ // estimate VR fov
				let proj = xrCamera.projectionMatrix;
				let inv = proj.clone().invert();

				let p1 = new THREE.Vector4(0, 1, -1, 1).applyMatrix4(inv);
				let rad = p1.y
				let fov = 180 * (rad / Math.PI);

				xrCamera.fov = fov;
			}

			for(let pointcloud of this.scene.pointclouds){
				const {material} = pointcloud;
				material.useEDL = false;
			}

			let vrWorld = view.clone().invert();
			vrWorld.multiply(xrCamera.matrixWorld);
			let vrView = vrWorld.clone().invert();

			this.pRenderer.render(this.scene.scenePointCloud, xrCamera, null, {
				viewOverride: vrView,
			});

		}

		{ // render VR scene
			let cam = makeCam();
			cam.parent = null;

			renderer.render(this.sceneVR, cam);
		}

		renderer.resetState();

	}

    clear(params={}){ 
        let background = params.background || this.background;
        let backgroundOpacity = params.backgroundOpacity == void 0 ? this.backgroundOpacity : params.backgroundOpacity//如果想完全透明，只需要backgroundOpacity为0
		let renderer = this.renderer
        //let gl = renderer.getContext()
         
        if(background instanceof THREE.Color){ //add
            renderer.setClearColor(background, backgroundOpacity);
        }else if(background === "skybox"){
			renderer.setClearColor(0x000000, backgroundOpacity);
		} else if (background === 'gradient') {
			renderer.setClearColor(0x000000, backgroundOpacity);
		} else if (background === 'black') {
			renderer.setClearColor(0x000000, 1);
		} else if (background === 'white') {
			renderer.setClearColor(0xFFFFFF, 1);
		} else {
			renderer.setClearColor(background, backgroundOpacity);
		}
		
		params.target || renderer.clear();
    
	}

    getBuffer(viewport){//根据不同viewport返回rtEDL的texture
         
        var buffer = this.buffers.get(viewport)
        if(!buffer){
           
            buffer = new THREE.WebGLRenderTarget(viewport.resolution.x, viewport.resolution.y, {
                minFilter: THREE.NearestFilter,
                magFilter: THREE.NearestFilter,
                format: THREE.RGBAFormat,
                type: THREE.FloatType 
            }); 
            this.buffers.set(viewport, rtEDL)
             
        } 
    
        return buffer
    }

 


	async renderDefault(params_={}){
        
        if(!this.visible  )  return
        
         
		let pRenderer = this.getPRenderer();
        let viewports = params_.viewports || this.viewports
        
         
		let renderer = params_.renderer || this.renderer
        viewer.addTimeMark('renderDefault','start')
        
        //console.log('render', viewports.map(e=>e.name).join(','))
        
        let renderSize
        if(params_.target){
            renderSize =  new THREE.Vector2(params_.target.width, params_.target.height) //是画布大小
            //可能需要viewer.setSize
        }else{
            renderSize = renderer.getSize(new THREE.Vector2()); //是client大小
        }
           
        
        
        ///let needsResize = viewports.length > 1 || params_.resize   //去掉原因：因为不需要渲染的viewport不在此中所以无法判断几个viewport
        for(let i=0; i<viewports.length; i++){
            let viewport = viewports[i]
            
            let params = $.extend({},params_);
            params.viewport = viewport
            //if(!params.target){
                params.camera = params.camera || viewport.camera;
                params.extraEnableLayers = viewport.extraEnableLayers
                params.cameraLayers = viewport.cameraLayers
            //}
            params.useModelOnRT = Potree.settings.intersectOnObjs && pRenderer.canUseRTPoint()  
                                && pRenderer.getIfRtEDL_(params) && !pRenderer.getIfuseEdl(params) //模型是否绘制在rtEDL上且能直接绘制到屏幕（感觉容易错）
                        
            
            
            var left,bottom,width,height
            { 
                left = Math.ceil(renderSize.x * viewport.left)
                bottom = Math.ceil(renderSize.y * viewport.bottom)
                
                if(params_.target){//有target时最好viewport是专门建出来的
                    width = renderSize.x * viewport.width  //target的大小可能和viewport不同，比如截图，这时会更改viewport大小
                    height = renderSize.y * viewport.height
                }else{ 
                    width = viewport.resolution.x // 用的是client的width和height
                    height = viewport.resolution.y
                }  
                if(width == 0 || height == 0)continue;//return
                
                width = Math.ceil(width)        //使用ceil，当原本有小数时，会重叠一个像素，无所谓
                height = Math.ceil(height)
                
                let scissorTest =  viewport.width<1 || viewport.height<1  
                if(params_.target){
                    params_.target.viewport.set(left, bottom, width, height);  
                    scissorTest && params_.target.scissor.set(left, bottom, width, height); 
                    params_.target.scissorTest = scissorTest
                    renderer.setRenderTarget(params_.target)
                }else{    
                    /* if(viewports.length == 1 && left == 0 && bottom == 0){
                        left = 1 , width-=1   //这种情况下渲染也会有问题，只有鼠标的地方刷新 估计是pick那影响的
                    } */
                    
                    /* if(scissorTest && left == 0 && bottom == 0){
                        left = 1 , width-=1 
                    } */   
                    if(viewport.forViewOffset){ //分块渲染，渲染时的camera还是原来的，但加载点云时的camera是分块中的
                        viewport.forViewOffset.camera.setViewOffset(renderSize.x, renderSize.y, left, renderSize.y - bottom - height, width, height)
                        renderer.setViewport(0,0,renderSize.x, renderSize.y)
                        viewport.resolution.copy(viewport.forViewOffset.originViewport.resolution)
                        viewport.resolution2.copy(viewport.forViewOffset.originViewport.resolution2) //后续渲染都当做原先的viewport
                    }else{
                        renderer.setViewport(left, bottom, width, height) //规定视口，影响图形变换（画布的使用范围） 
                    }
                    //scissorTest && console.log('setScissor', left, bottom, width, height)
                    scissorTest && renderer.setScissor( left, bottom, width, height );//规定渲染范围
                    renderer.setScissorTest( scissorTest );//开启WebGL剪裁测试功能，如果不开启，.setScissor方法设置的范围不起作用 | width==1且height==1时开启会只有鼠标的地方刷新，很奇怪
                    
                } 
            } 
            
            //if(needsResize){
                this.ifEmitResize( { viewport} )
            //} 
              
            viewer.dispatchEvent({type: "render.begin",  viewer: viewer, viewport, params });
             
          
            viewport.beforeRender && viewport.beforeRender()  
            
            
            
            
            
            
            if(viewport.render){ 
                if(!viewport.render($.extend({}, params, {
                    renderer,   clear:params.clear || this.clear.bind(this), resize:null,
                    renderBG:this.renderBG.bind(this),  force:true  //viewer content_change时map也直接渲染吧     //!viewport.noPointcloud //如果要渲染点云，必须也一直渲染地图，否则地图会被覆盖（点云目前未能获取是否改变，也可能有其他动态物体，所以还是一直渲染的好）
                }))) continue//return
            }else{ 
                this.clear(params)  
                pRenderer.clearTargets(params);
                 
                 
                this.renderBG(viewport)
                 
                if(this.splatMesh){
                    Potree.Utils.setCameraLayers(params.camera, ['model'])
                    this.renderer.render(this.splatMesh, params.camera) 
                } 
   
                if(Potree.settings.notAdditiveBlending ){
                    params.renderBeforeCloud = true
                    this.renderOverlay1(params)   //先渲染不透明的model。    
                }   
            }
           
            
            if(!viewport.noPointcloud ){ 

                if(params_.needWaitLoadPoint){
                    await this.waitPointLoad(null, params_.maxTimeForPointLoad,  viewport ) //resolution得用split前整个的viewport的
                }else{
                    this.updateViewPointcloud(params.camera, viewport.resolution, true)  
                }
                
            
                
                 
                pRenderer.render(params); //渲染点云 skybox。 
                
            } 
                 
            if(Potree.settings.notAdditiveBlending){ // 融合页面才用到
                params.renderBeforeCloud = false
                this.renderOverlay1(params) 
                this.renderOverlay2(params)  
            }else{ 
               this.renderOverlay(params)                 
            }
               
            
               
               
            viewport.afterRender && viewport.afterRender() 

            this.dispatchEvent({type: "render.end",  viewer: this, viewport  }); 
            viewport.needRender = false
            viewport.lastRenderTime = Date.now()
         
        }
 
        
       
        
        /* if(params_.screenshot){ //抗锯齿 
            this.composer.render();   
        } */  
        
        
        this.renderer.setRenderTarget(null)
        
        
        viewer.scene.pointclouds[0] && this.addFakeMeasure('visibleNodes', viewer.scene.pointclouds[0].visibleNodes.length )// 
        this.addFakeMeasure('numVisiblePoints', Potree.numVisiblePoints/100000)//十万  numVisiblePoints和帧率成反比(若每一帧都render的话)，和render用时成正比 (y=kn+b)。但visibleNodes个数也影响，多的话也更卡。visibleNodes和numVisiblePoints不成正比，少的visibleNodes可能numVisiblePoints多
      
        viewer.addTimeMark('renderDefault','end')
	}
    
    renderBG(viewport){ 
        let background = viewport.background || viewer.background;
        let backgroundOpacity = viewport.backgroundOpacity == void 0 ? viewer.backgroundOpacity : viewport.backgroundOpacity//如果想完全透明，只需要backgroundOpacity为0
        if(backgroundOpacity != 0){//绘制背景. 为了防止相机移动后天空不动有点死板，做一定的动态
            if(background === "skybox"){
                //限制相机到原点的距离。 
                let skyCamera = viewport.camera.type == "OrthographicCamera" ? viewer.skybox.cameraOrtho : viewer.skybox.camera
                let safeRatio = 0.02;
                let safeWidth = Potree.config.skyboxBgWidth * safeRatio / 2;  //相机只能在这个范围内移动
                if(!viewport.skyboxFixPos){ //允许不在全景图中心，允许位移造成一定程度畸变 
                    let dir = new THREE.Vector3().subVectors(viewport.camera.position, viewer.bound.center);
                    let length = dir.length()
                    const moveMax = 100;
                    let aimRadius = easing.easeOutQuart(Math.min(length, moveMax) , 0, safeWidth, moveMax) //(x, startY, wholeY, maxX) 当自变量为0-moveMax时，相机位移量为0-safeWidth
                    dir.multiplyScalar(aimRadius/length)  
                    skyCamera.position.copy(dir)
                }else{
                    skyCamera.position.set(0,0,0)
                }
                
                skyCamera.rotation.copy(viewport.camera.rotation);
                skyCamera.aspect = viewport.camera.aspect;
                
                if(viewport.camera.type == "OrthographicCamera"){ //调节zoom
                    skyCamera.left = viewport.camera.left; skyCamera.right = viewport.camera.right; skyCamera.top = viewport.camera.top; skyCamera.bottom = viewport.camera.bottom
                    
                    let a = Potree.config.skyboxBgWidth / 2 - safeWidth
                    let minY = Math.max(skyCamera.right / a, skyCamera.top / a,  viewport.skyboxMinZoom||0); //能够使skybox铺满画布的最小zoom.  提示：越远zoom越小
                    let maxY = Math.max(20, minY) ;//自定义一个 不会超过的最大实际zoom
                    //viewport.camera.zoom自变量的变化范围：
                    let minX = 1
                    let maxX = 80  
                    let x = THREE.Math.clamp(viewport.camera.zoom - minX, minX, maxX) 
                    skyCamera.zoom = easing.easeOutCubic(x-minX, minY, maxY-minY, maxX-minX) //自变量范围从0开始，所以减去minX
                    
                    //pos的范围先不管了 其实aimRadius是有误的，但效果还行
                }else{
                    skyCamera.fov = viewport.camera.fov;
                    skyCamera.zoom = 1
                }
                  
                
                viewport.skyboxRenderFun && viewport.skyboxRenderFun()
                
                skyCamera.updateProjectionMatrix();
                skyCamera.updateMatrixWorld()
                viewer.renderer.render(viewer.skybox.scene, skyCamera);
            }else if(background === 'gradient'){ 
                viewer.scene.cameraBG.layers.set(Potree.config.renderLayers.bg);
                viewer.renderer.render(viewer.scene.scene, viewer.scene.cameraBG);
            }else if(background === 'overlayColor'){//在不clear的前提下加一层背景色 
                viewer.scene.bg2.material.color.copy(viewport.backgroundColor)
                viewer.scene.bg2.material.opacity = viewport.backgroundOpacity
                viewer.scene.cameraBG.layers.set(Potree.config.renderLayers.bg2);
                viewer.renderer.render(viewer.scene.scene, viewer.scene.cameraBG);
                
            }  
              
        }
        
        //全景图的部分和点云有点相关就不移动到这了。但是如果是showPanos模式，就不要渲染背景了。
        
    }
	
    /* 
        关于透明度：
        由于点云和mesh是分开渲染的，且材质很不一样，所以透明和blend有冲突
        
        1 如果点云的blend是AdditiveBlending，也就是普通的叠加模式。
            则半透明点云的depthTest和depthWrite都为false
            这时候mesh要后渲染，且depthWrite不能为false（除非depthTest也为false），否则将被点云遮住。
        2 如果点云的blend是普通型
            则半透明点云的depthTest和depthWrite都为true。（为何depthWrite不能像mesh一样为false, 否则点云自身透明会错乱，可能因为太多points了）
            这时候若mesh全部先渲染，则 透过depthWrite为false的半透明mesh看不透明点云，mesh会完全被点云遮住。但是透明的物体就是depthWrite要为false，否则也会完全遮住点云
             
            即使是后渲染半透明的mesh，若透过点云看mesh，mesh会完全被点云遮住（为什么之前遇到过 透过点云看mesh，点云会显示不出）
            
            最终选择是先渲染不透明的mesh，然后点云，然后透明的mesh。虽然点云对mesh透明会失效。 
   
    */

    renderOverlay(params){   
    
        viewer.addTimeMark('renderOverlay','start')
        this.renderOverlay1(params)
        this.renderOverlay2(params) 
        viewer.addTimeMark('renderOverlay','end')
        
    }
     
    renderOverlay1(params){//渲染主要的mesh
        let camera = params.camera ? params.camera : this.scene.getActiveCamera();
        let renderer = params.renderer || this.renderer
        this.reticule.updateAtViewports(params.viewport)
        renderer.setRenderTarget(params.target||null)
        
         //为什么要在点云之后渲染，否则透明失效 、 会被点云覆盖 
        let cameraLayers
        if(params.cameraLayers) cameraLayers = params.cameraLayers
        else{
            if(params.viewport.name == "mapViewport" )cameraLayers = ['bothMapAndScene', 'light']
            else {
                cameraLayers = ['sceneObjects', 'light', 'bothMapAndScene' ];
                if(!params.useModelOnRT){
                     cameraLayers.push('model')
                } 
            }
            
        }
        
         
        if(cameraLayers.length){
            Potree.Utils.setCameraLayers(camera,  cameraLayers, params.extraEnableLayers) //透明贴图层 skybox 、reticule marker 不能遮住测量线
            
            
            if('renderBeforeCloud' in params){
                this.scene.scene.traverse((object)=>{
                    if(params.useModelOnRT && viewer.objs.children.includes(object)  )return {stopContinue:true} //already drawn on rt
                    if(object.material){  
                        let transparent = object.material.opacity<1 || object.material.mapTransparent || !object.material.depthTest || !object.material.depthWrite //不写入深度的往往最后来比较
                        Potree.Utils.updateVisible(object, 'renderOpa',  params.renderBeforeCloud != transparent)  
                        //点云之前渲染的话隐藏半透明的， 点云之后渲染的话隐藏不透明的。  depthTest==false的也最后渲染。 mapTransparent是手动加的，代表确定该贴图含有透明部分，即使opacity为1
                    } 
                })//ground的材质中opacity为1，所以被当做不透明了
            }
            
            viewer.dispatchEvent({type: "render.begin2" , name:'scene', viewport:params.viewport, viewer:this })
            renderer.render(this.scene.scene, camera);  
             
            if('renderBeforeCloud' in params){
                this.scene.scene.traverse((object)=>{
                    if(params.useModelOnRT && viewer.objs.children.includes(object)  )return {stopContinue:true} //already drawn on rt
                    if(object.material){  
                        Potree.Utils.updateVisible(object, 'renderOpa',  true) //恢复 
                    } 
                })
            }
        }
           
        this.dispatchEvent({type: "render.pass.scene", viewer: viewer});
    
      
    }
    
    
    
    
    renderOverlay2(params){//渲染剩余部分
        let renderer = params.renderer || this.renderer
        let camera = params.camera ? params.camera : this.scene.getActiveCamera();
        //清除深度 ！！！！
        renderer.clearDepth(); 
 
        if(!params.magnifier){ 
            //测量线 
            this.dispatchEvent({type: "render.pass.perspective_overlay", camera, screenshot:params.screenshot,viewport:params.viewport, renderer});
            
            if(!params.screenshot && params.viewport.name != "mapViewport" ){
                Potree.Utils.setCameraLayers(camera, ['magnifier']) //magnifier 遮住测量线 
                renderer.render(this.scene.scene, camera);
            }
        } 
        
        if(params.viewport.name != "mapViewport" ) {
            Potree.Utils.setCameraLayers(camera, ['volume','transformationTool'])  
            //viewer.dispatchEvent({type: "render.begin2" , name:'clip&trans',viewport:params.viewport  })
            renderer.render(this.clippingTool.sceneVolume, camera);  //official 可以删
            renderer.render(this.transformationTool.scene, camera);
        }
    
    
    }
    
    
    
     
    setLimitFar(state){//切换是否limitFar
        viewer.mainViewport.camera.limitFar = !!state
        if(state){
            viewer.mainViewport.camera.near = 0.02;
            viewer.mainViewport.camera.far = Potree.settings.displayMode == 'showPanos' ? viewer.farWhenShowPano : Potree.settings.cameraFar;
            viewer.mainViewport.camera.updateProjectionMatrix()
        }
    }
    
     
     
     
    setClipState(state){//有时候需要暂时关闭下clip
        state = !!state
        if(this.clipUnabled == !state)return
        this.scene.volumes.filter(v=>/* v.clip && */ v instanceof Potree.BoxVolume).map(volume=>{ 
            volume.clip = state
            Potree.Utils.updateVisible(volume, 'setClipState',  state) 
        })
        this.clipUnabled = !state
    }
    
    
     
    /* 大规模WebGL应用引发浏览器崩溃的几种情况及解决办法
    https://blog.csdn.net/weixin_30378311/article/details/94846947 */
     
	async render(params={}){//add params 
        viewer.addTimeMark('render','start')
        const vrActive = this.renderer.xr.isPresenting;
        let {SiteModel,PanoEditor} = viewer.modules
        
        if(this.screenshoting && !params.screenshot)return //正在截图
   
        let s = SiteModel.editing && SiteModel.selected && (SiteModel.selected.buildType == 'room' || SiteModel.selected.buildType == 'floor') //空间模型的房间选中材质是需要depth的，这时候需要绘制两次点云
         
        Potree.settings.pointEnableRT = /* !this.screenshoting && */ (this.scene.measurements.filter(e=>e.visible).length > 0 || s || PanoEditor?.entered || this.tags.children.some(e=>e.visible))
                                            //2024.12为什么截图时不遮挡？
         
        if(vrActive){
            this.renderVR();
        }else{ 
            let specialRender =  !!params.viewports 
            let viewports = params.viewports || this.viewports
             
            if(!this.needRender && !Potree.settings.renderAllViewports){
                viewports = viewports.filter(v=>v.needRender) //可以渲染的条件是viewer或viewport的needRender为true
            }
            viewports = viewports.filter(v=>v.active) 
            if(viewports.length > 0){   
                 
                params.viewports = viewports  
                if(this.outlinePass.selectedObjects.length && this.outlinePass.edgeStrength > 0 && !params.screenshot 
                   // || this.images360.fastTranMaskPass.enabled
                ){  
                    let scenes = this.inputHandler.interactiveScenes.concat(this.scene.scene).concat(viewer.scene.scenePointCloud) 
                    this.composer.render(scenes, null, this.viewports, this.renderDefault.bind(this));  
                }else{  
                    await this.renderDefault(params);
                }
                
              
                {
                    let marks = performance.getEntriesByName("loop-start")
                    marks.length && (marks[marks.length-1].rendered = true )
                }
                
            } 
            if(!specialRender) this.needRender = false            
        }
		viewer.addTimeMark('render','end')
	} 



    

    startScreenshot(info={},  width=800, height=400, compressRatio ){//add
        //let deferred = info.deferred || $.Deferred();
        let getImageDeferred = info.getImageDeferred || $.Deferred();
        let finishDeferred = info.finishDeferred || $.Deferred();
 
        let viewerMaster = info.map ? this.mapViewer : this; //截图主体
        let useMap = info.map || info.type == 'measure' || info.type.includes('prism2d')
        
        
        
        if(Potree.settings.displayMode == 'showPanos' && viewer.mainViewport.view.isFlying('pos')){//如果在飞，飞完再截图
            info.getImageDeferred = getImageDeferred , info.finishDeferred = finishDeferred
            let f = ()=>{
                this.startScreenshot(info,  width, height, compressRatio)  
            } 
            viewer.mainViewport.view.addEventListener('flyingDone', f, {once:true}) 
          
            return {getImagePromise:getImageDeferred.promise(), finishPromise:finishDeferred.promise()}
        }
        
        var startTime = Date.now()
        //抗锯齿待加 1 post处理 2截图大张再抗锯齿缩小
        this.pauseTestMaxLevel = true
        this.screenshoting = true
    
        console.log('startScreenshot: '+startTime)
        
        let updateCamera = ()=>{ 
            viewports.forEach(e=>{
                e.view.applyToCamera(e.camera) //因为fly时只更新了view所以要强制更新下camera
                
                this.dispatchEvent({  //update map  and sprite,  mapChanged
                    type: "camera_changed", 
                    camera: e.camera,
                    viewport : e,
                    changeInfo:{positionChanged:true,changed:true}
                })   
            })  
        }
        
        let screenshot = async ()=>{ 
            let pose
          
            useMap && (viewer.mapViewer.needRender = true)
            
            
            
            info.beforeScreenshot && info.beforeScreenshot()
            
            let render = async ()=>{ 
            
                this.needRender = true
                viewports.forEach(e=>e.active = true)  
            
                if(info.useRenderTarget){
                    //离屏渲染 有抗锯齿问题、在手机上速度慢   主视图一样会变内容，还是不用这个了
                    var { dataUrl  } = viewerMaster.makeScreenshot( new THREE.Vector2(width,height), null, compressRatio    );
                    
                }else{ 
                    
                    //直接渲染 会改变canvas大小
                    let canvas = viewerMaster.renderer.domElement
                    //canvas.width = width, canvas.height = height //不需要改canvas大小， 只需要 this.renderer.setSize(width, height ); 前面updateScreenSize已经执行
                    await viewerMaster.render({  screenshot : true,   width , height,   resize :true,  needWaitLoadPoint:!!info.splitRenderInfo, maxTimeForPointLoad:info.maxTimeForPointLoad  }); //需要resize
                    
                    /* if(info.type.includes('prism2d')){//o.map要为true
                        viewer.dispatchEvent({type:'resize', viewport:viewer.mapViewer.viewports[0]}) //借用viewer通知lineMaterial resize
                        viewerMaster.renderOverlay()
                    } */
                    var dataUrl = canvas.toDataURL('image/png',compressRatio) 
                }
                return dataUrl
            }
            
            
            let dataUrl
            if(info.splitRenderInfo){//为了防崩溃，分区域批次渲染
                let {wc , hc} = info.splitRenderInfo
                let camera = viewer.mainViewport.camera
                let dataUrls = []  
                let width_ = Math.ceil(1/wc * width) , height_ = Math.ceil(1/hc * height)  //可能加起来比原图大，没事到时候边界会重合
                viewer.updateScreenSize({forceUpdateSize:true, width:width_, height:height_, forTarget:info.useRenderTarget}) //更新viewports相机透视 使focusOnObject在此窗口大小下
                for(let i=0;i<wc;i++){
                    let col = []
                    for(let j=0;j<hc;j++){
                        let left = Math.ceil((-wc/2+0.5+i)*width_), top = Math.ceil((-hc/2+0.5+j)*height_) 
                        camera.setViewOffset(width_, height_,  left, top , width_, height_)   //顺序从上到下从左到右
                        let dataUrl = await render() 
                        //Common.downloadFile(dataUrl, 'screenshot'+ i+':'+j+'.png') 
                        col.push({dataUrl,  width:width_, height:height_})
                    }
                    dataUrls.push(col) 
                }
                camera.clearViewOffset()
                
                dataUrl = await Utils.combineImgs(dataUrls, compressRatio, width, height) 
                 
            }else{
                dataUrl = await render() 
            }
            
             
            
            
            
            if(info.splitRenderInfo){
                viewer.viewports = [viewer.mainViewport]
            }
            
            if(!Potree.settings.isOfficial){
                Common.downloadFile(dataUrl, 'screenshot.png') 
            } 
            
            
            
            var finish = ()=>{
                
                oldStates.viewports.forEach(old=>{//恢复相机
                    var viewport = viewports.find(v=>v.name == old.name);
                    viewport.left = old.left; viewport.bottom = old.bottom;
                    viewport.width = old.width; viewport.height = old.height
                    viewport.view.copy(old.view) 
                    //viewport.view.applyToCamera(viewport.camera);  
                    if(viewport.camera.isOrthographicCamera){
                        viewport.camera.zoom = viewport.view.zoom
                    }
                }) 
                
                viewerMaster.updateScreenSize({forceUpdateSize:true})//更新像素
                
                /* oldStates.viewports.forEach(old=>{//恢复相机
                    var viewport = [mapViewport, mainViewport].find(v=>v.name == old.name);
                    this.dispatchEvent({  //update map
                        type: "camera_changed", 
                        camera: viewport.camera,
                        viewport : viewport
                    }) 
                })  */
                updateCamera()       
                
                finishDeferred.resolve({dataUrl, pose})
               
               
                info.map || setTimeout(()=>{
                    if(!this.screenshoting){
                        //Potree.settings.pointNoLimit = false  
                        Potree.settings.pointDensity = 'high'
                        //console.warn('恢复pointDensity') 
                        /* if(viewer.scene.pointclouds[0].material.oldSize_ ){
                            viewer.scene.pointclouds[0].material.size = viewer.scene.pointclouds[0].material.oldSize_ 
                            viewer.scene.pointclouds[0].material.oldSize_ = null   
                        } */                        
                    }
                },500) //延迟：避免连续多次截图时释放点云
                this.screenshoting = false
               
                console.log('screenshot done: ' +  startTime,  'costTime', (Date.now() - startTime)  + 'ms')
            }
            
            {//恢复：
                
                this.backgroundOpacity = oldStates.bgOpacity;
                this.background = oldStates.background;
                this.pauseTestMaxLevel = false
                oldStates.displayMode && (Potree.settings.displayMode = oldStates.displayMode)
                
                if(info.type == 'measure' || info.type.includes('prism2d')){
                    this.modules.SiteModel.pauseUpdateEntity = false
                    this.focusDatasets = null
                    this.scene.measurements.forEach(e=>Potree.Utils.updateVisible(e, 'screenshot',true))
                    info.type == 'measure' && info.measurement.setSelected(false, 'screenshot')
                }
                
                if(info.type.includes('prism2d')){
                    //viewer.mapViewer.transparentBG = false;
                     
                    (info.prisms || [info.prism]).forEach(prism=>{
                        prism.changeStyleForScreenshot(false)
                        if(info.type == 'prism2d-single'){ 
                            prism.baseModel && (Potree.Utils.updateVisible(prism.baseModel, 'screenshot', false, 3, 'cancel'), Potree.Utils.setObjectLayers(prism.baseModel, 'model'))
                            prism.setEditState(false)
                        }
                    })  
                }
               
                
                this.images360.panos.forEach(pano=>{
                    Potree.Utils.updateVisible(pano, 'screenshot', true)
                })    
                Potree.Utils.updateVisible(this.reticule, 'screenshot', true)
                 
                
                 
                
                if(useMap){
                    Potree.Utils.updateVisible(this.mapViewer.cursor, 'screenshot', true)
                    
                    
                    if(oldStates.attachedToViewer != this.mapViewer.attachedToViewer){ 
                        this.mapViewer.attachToMainViewer(!!oldStates.attachedToViewer )   
                    }
                    if(oldStates.attachedToViewer && this.mapViewer.splitDir != oldStates.oldSplitDir){
                        this.mapViewer.changeSplitScreenDir(oldStates.oldSplitDir)
                    }
                    
                    
                    mapViewport.noPointcloud = oldStates.noPointcloud
                     
                    
                    Potree.Utils.updateVisible(viewer.mapViewer.mapLayer.sceneGroup, 'screenshot-prism', true) 
                
                } 
                      
                
                
                let recover = ()=>{ 
                    if(Potree.settings.displayMode == 'showPanos') {
                        viewer.images360.flyToPano({pano:oldStates.pano, duration:0, callback:()=>{
                            finish()
                        }}) 
                    }else{
                        finish()
                    } 
                }
                
                if(info.ifGetPose){
                    Potree.sdk.scene.getPose().done(pose_ =>{
                        pose = pose_
                        getImageDeferred.resolve({dataUrl, pose})  
                        recover() 
                    }) 
                }else{
                    recover()
                }
                
            }  
            
            
        }// screenshot  end
        
        
        
        let mapViewport 
        let mainViewport = this.mainViewport
        let viewports = [],  oldStates = {
            viewports:[],
            pano: Potree.settings.displayMode == 'showPanos' ? viewer.images360.currentPano : null,
            bgOpacity : this.backgroundOpacity,
            background: this.background
        }
        if(!info.type.includes('prism2d')){
            viewports.push(mainViewport)
            mainViewport.camera.isOrthographicCamera && (mainViewport.view.zoom = mainViewport.camera.zoom)
            oldStates.viewports.push(mainViewport.clone()) 
        }
        if(useMap){
            mapViewport = this.mapViewer.viewports[0]
            mapViewport.view.zoom = mapViewport.camera.zoom
            viewports.push(mapViewport)
            oldStates.viewports.push(mapViewport.clone())  
            oldStates.attachedToViewer = this.mapViewer.attachedToViewer
            oldStates.noPointcloud = mapViewport.noPointcloud
            oldStates.displayMode = Potree.settings.displayMode
             
            Potree.Utils.updateVisible(this.mapViewer.cursor, 'screenshot', false)//令mapCursor不可见
        }
         
        viewports.forEach(e=>e.active = false) //暂停渲染
        
        if(info.hideMarkers){
            this.images360.panos.forEach(pano=>{//令漫游点不可见
                Potree.Utils.updateVisible(pano, 'screenshot', false)
            }) 
        }                    
        Potree.Utils.updateVisible(this.reticule, 'screenshot', false)//令reticule不可见 
         
         
        
        if(info.bgOpacity != void 0){
            this.backgroundOpacity = info.bgOpacity 
        }
        if(info.background != void 0){
            this.background = info.background 
        }
         
        Potree.settings.pointDensity = info.pointDensity || 'screenshot'
        
        
        
        
         
        
        let focusDatasets = (measurements)=>{
            this.focusDatasets = []
            measurements.forEach(measure=>{
                measure.points_datasets.forEach(e=>{
                    let p = viewer.scene.pointclouds.find(a=>a.dataset_id == e)
                    if(p && !this.focusDatasets.includes(p)){
                        this.focusDatasets.push(p)
                    } 
                })
            })  
            this.updateFpVisiDatasets()
        }
        
        
        if(info.type == 'measure'){//要截图双屏 
            this.scene.measurements.forEach(e=>Potree.Utils.updateVisible(e,'screenshot',e == info.measurement)  )
            info.measurement.setSelected(true, 'screenshot')
            
            
            //因为分屏后位置才最终确定，才能确定是否显示出floorplan所以先分屏
            if(Potree.settings.floorplanEnable){ 
                oldStates.oldSplitDir = this.mapViewer.splitDir
                this.mapViewer.attachToMainViewer(true, 'measure', 0.5 ,  {dir:'leftRight'} ) 
            }  
            viewer.updateScreenSize({forceUpdateSize:true, width, height, forTarget:info.useRenderTarget}) //更新viewports相机透视 使focusOnObject在此窗口大小下
             
            let begin = ()=>{
                useMap = this.mapViewer.attachedToViewer 
                updateCamera() 
                if(useMap){
                    let waitMap = ()=>{
                        console.log('waitMap: '+startTime, Date.now(), this.mapViewer.mapLayer.loadingInProgress )  
                        this.mapViewer.waitLoadDone(screenshot.bind(this))//等待地图所有加载完 
                    }   
                    this.waitPointLoad(waitMap,info.maxTimeForPointLoad) 
                }else{  
                    this.waitPointLoad(screenshot,info.maxTimeForPointLoad)
                } 
            }
            
            let {promise} = this.focusOnObject(info.measurement, 'measure', 0, {
                basePanoSize:1024,  gotoBestView:true,
               //minMapWidth: THREE.Math.clamp(Math.min(viewer.bound.boundSize.x,  viewer.bound.boundSize.y) / (20/* this.mapViewer.mapLayer.maps.find(e=>e.name == 'map').disabled  ? 6 : 3*/),  2, 25)           //有地图的话为了显示出名字需要更大范围
            })//注意：不同角度截图 得到三维的会不一样，因为focusOnObject是根据方向的
            promise.done(()=>{  
                //console.log('promise.done') 
                //根据当前位置更新floorplan显示
                //console.log('view Pos ', this.mainViewport.view.position.toArray())
                 
                this.updateDatasetAt(true)  
                this.modules.SiteModel.updateEntityAt(true, {measure:info.measurement}) //更新测量线所在楼层，展示俯视图
                if(!this.modules.SiteModel.inEntity){
                    focusDatasets([info.measurement]) 
                }
                
                this.modules.SiteModel.pauseUpdateEntity = true
                
                
                //console.log('currentFloor', this.modules.SiteModel.currentFloor, 'currentDataset', this.atDatasets )    
           
                let floorplanShowed = this.mapViewer.mapLayer.maps.some(e => e.name.includes('floorplan') && e.objectGroup.visible)//如果没有floorplan展示就不分屏（如果focus时飞出数据集从而不展示怎么办。尤其是俯瞰比较长的线时容易这样，或许要根据其所在数据集强制显示）
                if(!floorplanShowed && this.mapViewer.attachedToViewer){ 
                    this.mapViewer.attachToMainViewer(false) //取消分屏
                    viewer.updateScreenSize({forceUpdateSize:true, width, height, forTarget:info.useRenderTarget}) //更新viewports相机透视
                    let {promise} = this.focusOnObject(info.measurement, 'measure', 0,     {basePanoSize:1024,gotoBestView:true,}  )//因画面比例更改，重新focus
                    promise.done(()=>{ 
                        begin()  
                    }) 
                }else{
                    begin() 
                } 
                
            })
        }else if(info.type.includes('prism2d')){
              
            let points = [], prisms = info.type == 'prism2d-all' ? info.prisms: [info.prism]
            
            this.mapViewer.attachToMainViewer(true, 'screenshot', 1 ,  {/* dir:'leftRight' */} ) 
            
            viewer.updateScreenSize({forceUpdateSize:true, width, height, forTarget:info.useRenderTarget}) //更新viewports相机透视 使focusOnObject在此窗口大小下
             
            prisms.forEach(prism=>{ 
                
                let prismPoints = prism.points.slice()
                
                if(prism.baseModel){
                   let currentBound = prism.baseModel.currentBound || prism.baseModel.boundingBox.clone().applyMatrix4(prism.baseModel.matrixWorld) 
                   prismPoints = prismPoints.map(e=>e.clone().setZ(Math.max(e.z,  currentBound.max.z)))
                }
                
                points.push(...prismPoints) 
                
                
                
                
                prism.setSelected(false)
                prism.changeStyleForScreenshot(true, {hideLabel: info.type != 'prism2d-all',  showName: info.type == 'prism2d-all' })
                if(info.type == 'prism2d-single') {
                    prism.baseModel && (Potree.Utils.updateVisible(prism.baseModel, 'screenshot', true, 3, 'add'),  Potree.Utils.setObjectLayers(prism.baseModel, 'bothMapAndScene'))
                    prism.setEditState(true) 
                } 
            }) 
            this.scene.measurements.forEach(e=>Potree.Utils.updateVisible(e,'screenshot', prisms.includes(e))  )
            
            this.backgroundOpacity = 0
            
            let {promise} = this.focusOnObject({points}, 'prisms2d', 0, { 
                minMapWidth: 0.5  , onlyMap:true,  focusBoundCenter:true, boundExpandRatio:1.4
            })
               
            promise.done(()=>{  
                updateCamera() 
                if(info.type == 'prism2d-all'){//全部 带平面图    
                    focusDatasets(prisms) //更新平面图  可能有漏洞，当不在任何一个数据集内的话？
                    this.mapViewer.waitLoadDone(screenshot.bind(this))//等待地图所有加载完
                
                }else{//single
                    mapViewport.noPointcloud = false //显示点云，而非平面图
                    Potree.settings.displayMode = 'showPointCloud'
                    Potree.Utils.updateVisible(viewer.mapViewer.mapLayer.sceneGroup, 'screenshot-prism', false)
                    
                    this.waitPointLoad(screenshot, 5000)
                }   
            })
         
             
        }else{//default
        
            let done = ()=>{
                updateCamera()
                if(info.splitRenderInfo){ 
                    screenshot()
                }else{
                    this.waitPointLoad(screenshot, info.maxTimeForPointLoad)
                }
            }
            viewer.updateScreenSize({forceUpdateSize:true, width, height, forTarget:info.useRenderTarget}) //更新viewports相机透视 使focusOnObject在此窗口大小下
            if(info.focusObjectInfo){  
                let {promise} = this.focusOnObject( ...info.focusObjectInfo)
                promise.done(()=>{
                    done()
                }) 
            }else{ 
                done()
            } 
            
        }            
         
         /*
            测量线的截图因为要调用分屏的，会改变画面
            但是普通截图的话，不会改变画面
         */
        
        return {getImagePromise:getImageDeferred.promise(), finishPromise:finishDeferred.promise()}
        
        
    }
    
    
    
    
    async waitPointLoad(done, maxTimeForPointLoad, viewport = viewer.mainViewport, resolution ){ 
        
        return new Promise((resolve,reject)=>{  
            let finish 
            let dealDone = ()=>{
                viewer.removeEventListener('update',update)     
                viewer.removeEventListener('overPointBudget',decreaseLevel)     
                finish || done && done()
                finish = true
                resolve() 
            }
            let decreaseLevel = (e)=>{ //降点云level 但基本降完也不会再加载低等级的点云了，所以是否直接不降？即使质量不平均
                if(e.restQueueSize < 10)return ;//差不多完成了
                let pointclouds = viewer.scene.pointclouds.filter(e=>e.visibleNodes.length)
                console.log('准备decreaseLevel， numVisiblePoints', e.numVisiblePoints, '最小numVisiblePoints占比',  1/pointclouds.length )
                 
                pointclouds.forEach(pointcloud=>{
                     let percent = pointcloud.numVisiblePoints / e.numVisiblePoints
                     //console.log('numVisiblePoints占总比', pointcloud.dataset_id, percent )
                     if(percent < 1/pointclouds.length)return
                     
                     let old = pointcloud.maxLevel
                     let levels = pointcloud.visibleNodes.map(e=>e.getLevel())  
                     let actMaxLevel = Math.max.apply(null, levels) //实际加载到的最高的node level
                     pointcloud.maxLevel = actMaxLevel - 1
                     console.warn(pointcloud.dataset_id,'decreaseLevel,新maxLevel', actMaxLevel - 1, '原maxlevel', old   ) 
                    
                 }) 
            }
            /* if(Potree.settings.displayMode == 'showPointCloud'){
                viewer.updateScreenSize({forceUpdateSize:true, width, height, forTarget:info.useRenderTarget})//需要先setSize才能加载范围内的点云
            } */
            //updateCamera()  
            //viewer.addEventListener('overPointBudget',decreaseLevel)
            
            let update = ()=>{ //前提：已经禁止渲染，仅加载点云
                let camera = viewport.forViewOffset ? viewport.forViewOffset.camera : viewport.camera 
                Potree.updatePointClouds(viewer.scene.pointclouds, camera , resolution || viewport.resolution );
            }
            viewer.addEventListener('update',update)            
            update()
            
            let maxTime = maxTimeForPointLoad || 2000
            document.hidden && (maxTime *= 6) //离开页面后会变成1秒1帧 
             
            setTimeout(()=>{
                if(Potree.pointsLoading && Potree.settings.displayMode == 'showPointCloud'){//如果还在加载 
                    
                    viewer.addEventListener('pointsLoaded',()=>{ //点云加载完时（不一定准确） 
                         if(!finish)console.log('加载完毕', ' numVisiblePoints', Potree.numVisiblePoints)                         
                        dealDone()
                    },{once:true})
                      
                    let overTime = ()=>{//超时不候（其实之后等待地图还会再加载几秒）
                        if(document.hidden){
                            return setTimeout(overTime, maxTime)  
                        }
                        if(!finish)console.warn('超时, numVisiblePoints', Potree.numVisiblePoints)  
                        dealDone()
                    }
                     
                
                    setTimeout(overTime, maxTime)
                }else{
                    console.log('已经加载完，无需再加载点云 numVisiblePoints', Potree.numVisiblePoints)
                    dealDone()
                } 
            },200)//先加载一段时间  
          
        }) 
    }
    
    

    focusOnObject(object, type, duration, o={} ) {
        //飞向热点、测量线等 。
        
        //console.log('focusOnObject: ', object,  type)
        
        let deferred = o.deferred || $.Deferred();
        let target  = new THREE.Vector3,  //相机focus的位置
            position = new THREE.Vector3, //相机最终位置
            dis;                          //相机距离目标
        duration = duration == void 0 ? 1200 : duration;      
        let camera = o.endCamera || viewer.scene.getActiveCamera()
        let cameraPos = camera.position.clone()
        let boundSize   
        
        
        if(o.dontChangeCamDir && (o.endYaw == void 0 || o.endPitch == void 0)){ //在俯视时仅靠dir来算不准
            o.endYaw = viewer.mainViewport.view.yaw
            o.endPitch = viewer.mainViewport.view.pitch
        }
        
        
        let moveMap = (done)=>{
            if(this.mapViewer && !o.dontMoveMap){ 
                //console.log('mapFocusOn: '+target.toArray())
                const minMapWidth = o.minMapWidth || 2 //截图的时候要显示的地图范围较大，为了显示出地区名字
                const minBound = new THREE.Vector2(minMapWidth,minMapWidth)//针对垂直线，在地图上只有一个点
                //原始的bound
                let boundOri
                if(object.points){
                    boundOri = new THREE.Box3() 
                    object.points.forEach(e=>{ 
                        boundOri.expandByPoint(e)
                    })
                }else{
                    boundOri = object.boundingBox
                }  
                
                if(o.focusBoundCenter){
                     boundOri.getCenter(target)
                     target.z += 1
                }
                let boundSizeOri = boundOri.getSize(new THREE.Vector3)
                let expand = o.boundExpandRatio || math.linearClamp(Math.max(boundSizeOri.x, boundSizeOri.y) , [0.5, 30], [2.5, 1.2])//为了能同时看清测量线和地图，当测量线较短时，扩大margin，防止地图过度放大
                let boundSizeMap = boundSizeOri.clone() 
                    boundSizeMap.x *= expand,  boundSizeMap.y *= expand 
                    
                
                
                boundSizeMap.x = Math.max(minBound.x, boundSizeMap.x )
                boundSizeMap.y = Math.max(minBound.y, boundSizeMap.y )
            
                this.mapViewer.moveTo(target.clone(), boundSizeMap, duration, o.margin, null,  done)
            }
        }
        
        if(o.onlyMap){
            moveMap(()=>{
                deferred.resolve()
            })  
            return {promise:deferred.promise()}
        }
        
        let getPosWithFullBound = (points, boundingBox, target, cameraPos  )=>{//使boundingBox差不多占满屏幕时的相机到target的距离
            // points 和 boundingBox 至少有一个
            
            let scale 
            
            if(o.dontChangeCamDir){
                var inv = camera.matrixWorldInverse;
            }else{
                var cameraTemp = camera.clone() 
                let view = viewer.mainViewport.view.clone();
                view.position.copy(cameraPos);
                view.lookAt(target);
                if(o.endPitch != void 0){
                    view.pitch = o.endPitch
                    view.yaw = o.endYaw
                }
                view.applyToCamera(cameraTemp)
                 
                //对镜头的bound
                var inv = cameraTemp.matrixWorldInverse;
            } 
            var bound = new THREE.Box3()  
            if(points){//使用points得到的bound更小  //如果points和boundingbox的差别较大，尤其使target和points中心不一致，那么points不一定会刚好在boundingbox内
                points.forEach(e=>{
                    var p = e.clone().applyMatrix4(inv);
                    bound.expandByPoint(p)
                })
                scale = 1.2;                
            }else{ 
                bound = boundingBox.applyMatrix4(inv);
                scale = 1 //0.9; 
            }
            boundSize = bound.getSize(new THREE.Vector3)
            
            if(o.boundScale){
                scale = o.boundScale
            }
            
            {
                 
                boundSize.x *= scale //稍微放大一些，不然会靠到屏幕边缘
                boundSize.y *= scale  
                let min = o.minBound || 1
                boundSize.x = Math.max(min, boundSize.x)
                boundSize.y = Math.max(min, boundSize.y)
            }
            if(camera.type == 'OrthographicCamera'){
                dis = boundSize.length() / 2
            }else{     
                let aspect = boundSize.x / boundSize.y
                if(camera.aspect > aspect){//视野更宽则用bound的纵向来决定
                    dis = boundSize.y/2/ Math.tan(THREE.Math.degToRad(camera.fov / 2)) + boundSize.z/2 
                }else{
                    let hfov = cameraLight.getHFOVForCamera(camera, true);
                    dis = boundSize.x/2 / Math.tan(hfov / 2) + boundSize.z/2
                }
                dis += camera.near
            }
            dis = Math.max(0.1,dis)
            
            //三个顶点以上的由于measure的中心不等于bound的中心，所以点会超出bound外。 且由于视椎近大远小，即使是两个点的，bound居中后线看上去仍旧不居中.
             
            //获得相机最佳位置
            let dir 
            if(o.dontChangeCamDir){
                dir = viewer.mainViewport.view.direction.negate()
            }else{
                dir = new THREE.Vector3().subVectors(cameraPos, target).normalize()  
            }
            if(o.dontLookUp && dir.z < 0){
                 dir.negate()
            }
            position.copy(target).add(dir.multiplyScalar(dis)) 
            
            
            if(false){//打开以检查box 
                if(!this.boundBox){//调试
                    this.boundBox = new THREE.Mesh(new THREE.BoxGeometry(1,1,1,1));
                    this.boundBox.material.wireframe = true
                    this.boundBox.up.set(0,0,1)  
                    Potree.Utils.setObjectLayers(this.boundBox,'sceneObjects')
                    this.scene.scene.add(this.boundBox); 
                } 
                this.boundBox.position.copy(target)
                this.boundBox.scale.copy(boundSize)
                this.boundBox.lookAt(position) 
            }
            
            return position
        } 
        
        
        if(this.images360.flying){
            let f = ()=>{
                this.focusOnObject(object, type, duration, $.extend(o,{deferred}))
                this.images360.removeEventListener('cameraMoveDone',f)
            }
            this.images360.addEventListener('cameraMoveDone',f) 
            return {promise: deferred.promise() }   
        }
        if (type == 'measure') {  
            if(object.points.length == 0){ 
                return {promise:deferred.resolve()}
            }
        
            target.copy(object.getCenter()) 
        
            //试试改变位置（方向），直视测量线。能避免倾斜角度造成的非常不居中、以及看不到面的情况 
            if(o.gotoBestView){//直接沿着法线方向看
                if(object.points.length>2){
                    let facePlane = object.getFacePlane(target) 
                    let normal = facePlane.normal.clone();
                    
                    if(normal.dot(this.mainViewport.view.direction) > 0){
                        normal.negate() //顺着视线
                    } 
                    //normal.z = Math.max(0.2, normal.z)//尽量不要仰视
                    cameraPos.copy(target).add(normal)
                }else{
                    let lineDir = new THREE.Vector3().subVectors(object.points[0],object.points[1]).normalize()
                    let facePlane = new THREE.Plane().setFromNormalAndCoplanarPoint(lineDir, target) 
                    //if(cameraPos.z < target.z + 1)cameraPos.z = target.z + 1//尽量不要仰视
                    
                    let dir = new THREE.Vector3().subVectors(cameraPos,target).normalize()
                    dir.z = Math.max(dir.z, 0.4);
                    cameraPos.copy(target).add(dir)//尽量不要仰视 
                    
                    
                    let dis = cameraPos.distanceTo(target)
                    dir = lineDir.clone().multiplyScalar(dis) 
                    let line = new THREE.Line3().set(cameraPos.clone().add(dir), cameraPos.clone().add(dir.negate())) //过相机位置作到面的垂线
                    facePlane.intersectLine(line, cameraPos ) //得垂足，作为新的相机位置。就能在测量线中间看测量线
                    
                }
            }else{
                if(object.points.length>2){ 
                    let facePlane = object.getFacePlane(target) 
                    let normal = facePlane.normal.clone()                
                    let angle = this.mainViewport.view.direction.angleTo(normal)
                    let minDiff = THREE.Math.degToRad(30) 
                    //console.log('angle',angle)
                    if(angle>minDiff && angle<Math.PI-minDiff){//当几乎正对时就不执行
                        if(angle<Math.PI/2){ //在背面
                            normal.negate()
                        }
                        let dir = new THREE.Vector3().subVectors(camera.position, target).normalize() 
                        let newDir = new THREE.Vector3().addVectors(dir,normal)//两个角度的中间
                        //console.log('newDir',newDir)
                        cameraPos.copy(target.clone().add(newDir))
                    }   
                }else if(object.points.length == 2){ //线段
                    let lineDir = new THREE.Vector3().subVectors(object.points[0],object.points[1]).normalize()
                    let angle = this.mainViewport.view.direction.angleTo(lineDir)
                    let maxDiff = Math.PI*0.25// 45度
                    if(angle<maxDiff || angle>Math.PI-maxDiff){//当几乎正对时就不执行
                        if(angle>Math.PI/2){  //令dir和lineDir成钝角
                            lineDir.negate()
                        } 
                        let dir = new THREE.Vector3().subVectors(camera.position, target).normalize() 
                        let mid = new THREE.Vector3().addVectors(lineDir, dir).normalize() //中间法向量（如果刚好dir和lineDir反向，那得到的为零向量，就不移动了，但一般不会酱紫吧）
                        let newDir = new THREE.Vector3().addVectors(dir, mid) 
                        cameraPos.copy(target.clone().add(newDir))
                    } 
                }else{
                    console.error('measure 没有facePlane points点数还不为2？')
                }  
            }   
            //截图时直接飞到最佳视角，也就是平视它所在面。其余时候为了避免镜头旋转过大就算了。
            
             
            
            
             
            position = getPosWithFullBound(object.points, null, target, cameraPos  )
            
             
            moveMap()
            
            
            if(Potree.settings.displayMode == 'showPointCloud'){  //点云 
                let minDis = 0.3;
                
                if(0 ){//如果没有被选中，会被遮挡。 2023.11.15 最好展示全局（尤其截图时），虽然被遮挡，但focus的过程是选中状态全显示的，可以看出所在范围。
                    let checkIntersect = ( )=>{ 
                        let intersect = this.inputHandler.ifBlockedByIntersect({point:position, cameraPos: target})// 不一定准确
                        if(intersect){ 
                            let blockCount = 0, unblockCount = 0, visi;
                            for(let i=0;i<object.points.length;i++){ //如果顶点超过一半不可见，就要更改位置
                                let p = object.points[i]
                                let blocked = this.inputHandler.ifBlockedByIntersect({point:p, margin:0.3 , cameraPos:position, pickWindowSize:4});
                                if(blocked){
                                    blockCount ++;
                                    if(blockCount / object.points.length >= 0.5){
                                        visi = false
                                        break
                                    }
                                }else{
                                    unblockCount ++;
                                    if(unblockCount / object.points.length > 0.5){
                                        visi = true
                                        break
                                    }
                                }
                            } 
                            
                            if(visi == void 0){
                                visi = unblockCount / object.points.length > 0.5
                            }
                            let shrink = ()=>{
                                let dir = new THREE.Vector3().subVectors(position, target).normalize().multiplyScalar(intersect.distance)
                                position.copy(target).add(dir) 
                                console.log('checkIntersect newPos', position.clone()  )
                                        
                            }
                            if(!visi){//更改位置距离target如果小于最小距离，需要反向。 否则直接缩短距离。
                                if(intersect.distance < minDis ){
                                    console.log('检测到intersect 反向', intersect.distance  )
                                    let position1 = position.clone()
                                    let dir = new THREE.Vector3().subVectors(position, target) 
                                    position.copy(target).sub(dir) 
                                    let intersect2 = this.inputHandler.ifBlockedByIntersect({point: position,  cameraPos:target})// 不一定准确
                                    if(intersect2){
                                        if(intersect2.distance < intersect.distance ){
                                            position.copy(position1)//恢复
                                        } 
                                        shrink()
                                    }
                                }else{
                                    shrink() 
                                } 
                            }
                        }   
                    } 
                    
                    checkIntersect() 
                    //多折线没有areaPlane 有时候会看向空白区域 - -
                }      
            }else if(Potree.settings.displayMode == 'showPanos'){//全景 (比较难校准)
                let target2, dir
                if( object.measureType?.includes('MulDistance')){//因为该线不闭合，可能看向target的方向会没有线，所以换一个target
                    target2 = object.points[Math.round(object.points.length / 2) ]//直接看向中间点
                    dir = new THREE.Vector3().subVectors(target2, position).normalize()  
                }
                let pano = viewer.images360.fitPanoTowardPoint({
                    /*point : target,  //不使用目标点来判断是因为缺少measure角度的信息。比如虽然可以靠近线的中心，但是线朝向屏幕，那几乎就是一个点了。
                    //bestDistance : dis * 0.5, //乘以小数是为了尽量靠近 
                    boundSphere: boundOri.getBoundingSphere(new THREE.Sphere), */
                    target, 
                    dir,  
                    point : position,
                    bestDistance : 0 , 
                    checkIntersect: o.checkIntersect,  gotoBestView: o.gotoBestView                    
                })
                
                
                let result = {promise:deferred.promise() }    
                if(pano && pano.msg){
                    pano = pano.pano
                    result.msg = pano.msg 
                }
                  
                if(pano){  
                    viewer.images360.flyToPano({pano, target : target2 || target, duration, deferred, dontMoveMap:true  , basePanoSize:o.basePanoSize})//dontMoveMap不要移动map，否则flytopano会自动在map中focus到漫游点的位置，而非测量线了
                    if(viewer.images360.currentPano == pano){ 
                        let dis1 = viewer.images360.currentPano.position.distanceTo(target)
                        let dis2 = position.distanceTo(target)
                        //console.log('dis1 / dis2',dis1 / dis2, 'dis1-dis2', dis1-dis2)
                        return {msg: (dis1 / dis2 > 1.5 && dis1-dis2>10)? 'tooFar' : 'posNoChange',  promise : deferred.promise()  }
                       
                    }
                }
                return result
                /* if(viewer.images360.currentPano == pano){ 
                    let dis1 = viewer.images360.currentPano.position.distanceTo(target)
                    let dis2 = position.distanceTo(target)
                    //console.log('dis1 / dis2',dis1 / dis2, 'dis1-dis2', dis1-dis2)
                    return {msg: (dis1 / dis2 > 1.5 && dis1-dis2>10)? 'tooFar' : 'posNoChange',  promise : deferred.promise()  }
                  
                }else{
                    return {promise : deferred.promise()}
                } */
                  
                //出现过到达位置后测量线标签闪烁的情况
                // 测量线截图 全景 最好能放大. 但要确保该位置放大后图片加载完有点困难
            }
            
        } else if (type == 'tag' || type == 'point') {
            //dimension = 1  
            target.copy(object.position)
            let bestDistance = o.distance || 3 
            
            if(!o.dontMoveMap && this.mapViewer){ 
                //console.log('mapFocusOn: '+target.toArray()) 
                this.mapViewer.moveTo(target.clone(), null, duration)
            }
            
           
            if(Potree.settings.displayMode == 'showPointCloud' && !o.requestShowPano){ 
                if(o.dontChangePos){
                    position.copy(cameraPos)
                }else{ 
                    if(o.maxDis){
                        let disNow = cameraPos.distanceTo(target)
                        dis = THREE.Math.clamp(disNow, 1, o.maxDis)
                    }else{
                        dis = bestDistance
                    }
                    
                    let dir = o.direction ? o.direction.clone().negate() :  this.mainViewport.view.direction.negate()// */new THREE.Vector3().subVectors(camera.position, target).normalize() 
                    if(o.dontLookUp && dir.z<0)  dir.z *= -1
                    position.copy(target).add(dir.multiplyScalar(dis))
                } 
                
                if(o.sameFloor){//需要在同一楼层
                    let atFloor = this.modules.SiteModel.pointInWhichEntity(target, 'floor')
                    if(atFloor){
                        let camFloor = this.modules.SiteModel.pointInWhichEntity(position, 'floor')
                        if(camFloor != atFloor){
                            let raycaster = new THREE.Raycaster();
                            let origin = target
                            let dir = new THREE.Vector3().subVectors( position, target ).normalize()
                            raycaster.set(origin, dir) 
                            let intersect = Potree.Utils.getIntersect(null, [atFloor.box], null, raycaster) 
                            if(intersect){
                                let dis = THREE.Math.clamp(intersect.distance - 0.2,  camera.near, intersect.distance)
                                position.addVectors(origin, dir.multiplyScalar(dis)) 
                                console.log('移动到楼层')    
                            }else{
                                console.error('?no intersect?')
                            }
                           
                        }                           
                    }
                }
                
                
                if(o.checkIntersect){//识别被点云遮住的话 
                    let intersect  //反向查找从target到相机的第一个intersect
                    intersect = this.inputHandler.ifBlockedByIntersect({point:position, margin:0,  cameraPos:target}   /* {point:target, margin: 0.2,  cameraPos:position} */)  
                     
                    if(intersect){ 
                        position.copy(intersect.location) 
                        console.log('移近')    
                    }  
                     
                }  
            
            }else{
                let pano = viewer.images360.fitPanoTowardPoint({
                    point : target,    
                    dir :  this.mainViewport.view.direction, //尽量不改相机方向，避免镜头晃动
                    checkIntersect: o.checkIntersect, sameFloor:o.sameFloor,
                    bestDistance,   maxDis:  o.maxDis   //越近越好，但不要太近，bestDistance左右差不多
                })
                let result = {promise:deferred.promise() }    
                if(pano && pano.msg){
                    pano = pano.pano
                    result.msg = pano.msg 
                }
                pano && viewer.images360.flyToPano({pano, target, duration, deferred, dontMoveMap:true , basePanoSize:o.basePanoSize })
                 
                return result           
            }
        }else if(object.boundingBox && type == 'boundingBox'){//使屏幕刚好看全boundingBox
            //object.boundingBox.min.clamp(new THREE.Vector3(-1e4, -1e4, -1e4), new THREE.Vector3(1e4, 1e4, 1e4))//防止过大，ces崩溃
            //object.boundingBox.max.clamp(new THREE.Vector3(-1e4, -1e4, -1e4), new THREE.Vector3(1e4, 1e4, 1e4))//防止过大，ces崩溃
            target = object.boundingBox.getCenter(new THREE.Vector3)
            if(o.dir){ //指定方向
                cameraPos.copy(target).sub(o.dir)
            }  
            position = getPosWithFullBound(object.points, object.boundingBox.clone(), target, cameraPos  )
            if(Potree.settings.displayMode == 'showPanos'){//全景 (比较难校准)
                let pano = viewer.images360.fitPanoTowardPoint({ 
                    point : position,
                    bestDistance : 0 , 
                })
                let result = {promise:deferred.promise() }    
                if(pano && pano.msg){
                    pano = pano.pano
                    result.msg = pano.msg 
                }
                pano && viewer.images360.flyToPano({pano, target, duration, deferred, dontMoveMap:true  , basePanoSize:o.basePanoSize})//dontMoveMap不要移动map，否则flytopano会自动在map中focus到漫游点的位置，而非测量线了
                
                if(!pano){
                    console.error('no pano')
                }
                return result
                //出现过到达位置后测量线标签闪烁的情况
            }else{
               /*  if(o.dontChangeCamDir){
                    target = null
                } */
                moveMap()
            }
            
        }



 
        if(o.startCamera && o.endCamera){
            viewer.mainViewport.view.tranCamera(this.mainViewport,  { endPosition:position, target ,
                boundSize, 
                callback:()=>{
                    //console.log('focusOnObjectSuccess: '+object.name,  type)
                    deferred.resolve()
                }, startCamera:o.startCamera, endCamera:o.endCamera, midCamera:this.scene.cameraBasic,
                endYaw:o.endYaw,  endPitch:o.endPitch
            }, duration) 
        }else if(camera.type == "OrthographicCamera"){   
            viewer.mainViewport.view.moveOrthoCamera(this.mainViewport,  { endPosition:position, target ,
                boundSize, 
                endYaw:o.endYaw,  endPitch:o.endPitch,
                callback:()=>{
                    //console.log('focusOnObjectSuccess: '+object.name,  type)
                    deferred.resolve()
                }, 
            }, duration)
        }else{ 
            viewer.mainViewport.view.setView({position, target, duration,
                endYaw:o.endYaw,  endPitch:o.endPitch,
                callback:()=>{
                    //console.log('focusOnObjectSuccess: '+object.name,  type)
                    deferred.resolve()
                }
            })
             
            
        
        }
         
        this.dispatchEvent({type:'focusOnObject', CamTarget:target, position}) //给controls发送信息
        
        return {promise:deferred.promise()}
    }
    



    flyToDataset(o={}){
        var pointcloud;
        if(o instanceof THREE.Object3D) pointcloud = o
        else if(o.pointcloud) pointcloud = o.pointcloud
        else pointcloud = this.scene.pointclouds.find(p => p.dataset_id == o.id);
         
        let duration = o.duration == void 0 ? 1000 : o.duration
        if(o.focusOnPoint || !pointcloud.panosBound){//focus点云上一点，避免center区域刚好没有点
            if(pointcloud.root.geometryNode){ 
                let posArr = pointcloud.root.geometryNode.geometry.attributes.position.array
                
                let count = pointcloud.root.geometryNode.geometry.attributes.position.count
                let index = Math.ceil(count / 2) //随便取一个点 
                let point = new THREE.Vector3(posArr[index*3+0],posArr[index*3+1],posArr[index*3+2]) 
                //point.applyMatrix4(pointcloud.root.pointcloud.matrixWorld)
                point.applyMatrix4(pointcloud.root.sceneNode.matrixWorld)
                viewer.focusOnObject({position:point},'point',duration,{dontChangeCamDir:true, distance:15})

                o.dontMoveMap || viewer.mapViewer.fitToPointcloud(pointcloud, duration)           
                console.log('flyToDataset focusOnPoint done')
                return
            }   
        }
         
        var center = pointcloud.bound.getCenter(new THREE.Vector3);
        let position
        let getPano = ()=>{//获取离中心最近的pano
            let request = []
            let rank = [
                Images360.scoreFunctions.distanceSquared({position: center}) 
            ]
            let r = Common.sortByScore(pointcloud.panos, request, rank);
            if(r.length){
                return r[0].item
            }
        }
        
        if(Potree.settings.displayMode == 'showPanos'){
            let pano = getPano()
            
            if(pano){
                if(pano == this.images360.currentPano) return 'posNoChange'
                this.images360.flyToPano({
                    pano 
                })
            }else return false
        }else{ 
            let target
            position = center
            if(pointcloud.panosBound){
                
                let panosCenter = pointcloud.panosBound.center  //pano集中的地方，也就是真正有点云的地方
                position = panosCenter.clone() 
                /* let ratio = 0.2
                position.z =  center.z * ratio + panosCenter.z * (1-ratio)   //因为panos一般比较低，为了不让相机朝下时看不到点云，加一丢丢中心高度
                  */
                let pano = getPano()
                if(pano){
                    target = pano.position    //针对像隧道一样的场景， 中心点还是panosCenter都在没有点云的地方，所以还是看向其中一个漫游点好。
                    position.z = target.z   //水平， 避免朝上或朝下
                }   
                
            }
        
        
            if(this.modules.Clip.editing){
                position.z = center.z   //剪裁时在中心高度，因为以点云为重点
                this.modules.Clip.bus.dispatchEvent({type:'flyToPos', position, duration })
            }else{
                if(math.closeTo(position, this.images360.position)) return 'posNoChange'
                 
                viewer.mainViewport.view.setView({position,  target, duration })   
            }
            o.dontMoveMap || viewer.mapViewer.fitToPointcloud(pointcloud, duration)            
        }            
        
        return true
        
        
    }


    findClosestDatasetOnMap(position){//寻找当前平面图上离某点最近的数据集
        let pointclouds = viewer.scene.pointclouds.filter(e=>e.visible);
         
        const addScore = viewer.bound.boundSize.length()
        let r = Potree.Common.sortByScore(pointclouds, [], [(e)=>{//pos2d和bound2d距离排序
            let pos3d = position.clone().setZ(e.panosBound ? e.panosBound.center.z : (e.bound.min.z+e.bound.max.z)/2)
            return - (e.panosBound ? e.panosBound.bounding : e.bound).distanceToPoint(pos3d)
        },(e)=>{//最有可能的是地图上显示的平面图
            return e in viewer.fpVisiDatasets ?  addScore : 0 
        }]);
        return r[0] && r[0].item

    }
    



 
    addTimeMark(name, type){
        let record = Potree.timeCollect[name] 
        let needRecord = record && record.start && record.measures.length < record.minCount
          
        if(needRecord || Potree.measureTimings){
            performance.mark(name+"-"+type)
             
            if(type == 'end'){
                let measure = performance.measure(name,name+"-start",name+"-end");
                  
                if(needRecord){
                    if(!measure){ //有出现过手机的depthSamChangeImg得不到measure，可能是因为时间太长在resolveTimings被清除了？   iphone8 plus ios14.1 型号MQ8F2CH/A    
                        return //console.log('未能得到performance.measure',name)
                    }  
                    record.latestDuration = measure.duration
                    record.measures.push( measure.duration ) 
                    record.sum += measure.duration;
                    record.ave = record.sum / record.measures.length;  
                    record.measures.sort( (a, b) => a - b   ); 
                    record.median = record.measures[parseInt(record.measures.length / 2)] 
                   
                }
            }
        } 
    }    
    
    
    addFakeMeasure(name,duration){//把一些count当做duration来统计
        if(!Potree.measureTimings)return
        if(!this.fakeMeasure[name]){ 
            this.fakeMeasure[name] = []
        }
        let object = {
            name, duration
        }
        this.fakeMeasure[name].push(object)
    }

	resolveTimings(timestamp,log){//打印用时。   注：performance手机的精度只到整数位 。 sidebar中监听update时有高cpu的函数所以不要用demo测
		
        if(!this.toggle){
            this.toggle = timestamp;
        }
        let duration = timestamp - this.toggle;
        if(duration > 4000.0){
            if(log){
                let measures = performance.getEntriesByType("measure");
                for(let i in this.fakeMeasure){
                    measures.push(...this.fakeMeasure[i])
                }
                
                
                let names = new Set();
                for(let measure of measures){
                    names.add(measure.name);
                }
                
                let groups = new Map();
                for(let name of names){
                    groups.set(name, {
                        measures: [],
                        sum: 0,
                        n: 0,
                        min: Infinity,
                        max: -Infinity
                    });
                }
                
                for(let measure of measures){
                    let group = groups.get(measure.name);
                    group.measures.push(measure);
                    group.sum += measure.duration;
                    group.n++;
                    group.min = Math.min(group.min, measure.duration);
                    group.max = Math.max(group.max, measure.duration);
                }


                 

                /* let glQueries = Potree.resolveQueries(this.renderer.getContext());  // resolveQueries 无
                for(let [key, value] of glQueries){

                    let group = {
                        measures: value.map(v => {return {duration: v}}),
                        sum: value.reduce( (a, i) => a + i, 0),
                        n: value.length,
                        min: Math.min(...value),
                        max: Math.max(...value)
                    };

                    let groupname = `[tq] ${key}`;
                    groups.set(groupname, group);
                    names.add(groupname);
                } */
                
                for(let [name, group] of groups){
                    group.mean = group.sum / group.n;
                    /* group.measures.sort( (a, b) => a.duration - b.duration );
                    
                    if(group.n === 1){
                        group.median = group.measures[0].duration;
                    }else if(group.n > 1){
                        group.median = group.measures[parseInt(group.n / 2)].duration;
                    }
                     */
                    let measures = group.measures.slice()
                    measures.sort( (a, b) => a.duration - b.duration );
                    
                    if(group.n === 1){
                        group.median = measures[0].duration;
                    }else if(group.n > 1){
                        group.median = measures[parseInt(group.n / 2)].duration;
                    }
                    
                     
                     
                }
                
                let cn = Array.from(names).reduce( (a, i) => Math.max(a, i.length), 0) + 5;
                let cmin = 6;
                let cmed = 6;
                let cmax = 6;
                let csam = 4;
                
                let message = ` ${"NAME".padEnd(cn)} |` 
                    + ` ${"MIN".padStart(cmin)} |`
                    + ` ${"MEDIAN".padStart(cmed)} |`
                    + ` ${"MAX".padStart(cmax)} |`
                    + ` ${"AVE".padStart(cmax)} |`
                    + ` ${"SAMPLES".padStart(csam)} \n`;
                message += ` ${"-".repeat(message.length) }\n`;
                
                names = Array.from(names).sort();
                for(let name of names){
                    let group = groups.get(name);
                    let min = group.min.toFixed(3);
                    let median = group.median.toFixed(3);
                    let max = group.max.toFixed(3);
                    let ave = group.mean.toFixed(3); //add
                    let n = group.n;
                    
                    message += ` ${name.padEnd(cn)} |`
                        + ` ${min.padStart(cmin)} |`
                        + ` ${median.padStart(cmed)} |`
                        + ` ${max.padStart(cmax)} |`
                        + ` ${ave.padStart(cmax)} |`
                        + ` ${n.toString().padStart(csam)}\n`;
                }
                message += `\n`;
                console.log(message);
            }
            
            this.fakeMeasure = {}  //clear
            performance.clearMarks();
            performance.clearMeasures();
            this.toggle = timestamp;
        }
		 
        //注意，console.log本身用时挺高，降4倍时可能占用0.5毫秒，所以不能每帧都打印 
	}

	loop(timestamp){
        //let startTime = performance.now()
        //console.log('间隔：' /*, parseInt((startTime - this.lastEndTime)*100 )/100 */)
        if(this.paused)return 
        if(performance.getEntriesByName("loopWaitNext-start").length)viewer.addTimeMark('loopWaitNext','end') 
         
         
		if(this.stats){
			this.stats.begin();
		}
       
        performance.mark('loop-start') ;// 无论有没有reportTimings都要获取，因为getBestCound需要
        this.dispatchEvent('loopStart')
        
        
        this.interacted = false
         
        this.shelterCount = {byTex:0, byCloud:0,   maxByTex: 100, maxByCloud:0   } //清空 因ifPointBlockedByIntersect可能在任何时候触发，所以需要一开始就定义这个，且每次计算最大可计算次数太麻烦了就定义一个吧。
        
       

        let deltaTime = this.clock.getDelta()
        
        
        
		this.update(deltaTime, timestamp);
        this.magnifier.render();
        
        
        viewer.addTimeMark('loop2','start')
        this.render(); 
        viewer.addTimeMark('loop2','end') 
        
        
        
        this.setAllTilesets(model=>model.runtime.update(deltaTime, this.renderer, this.mainViewport.camera))
        
        let hasAnimation
        this.objs.children.forEach(model=>{
            if(model.aniMixer){
                hasAnimation = true
                model.aniMixer.update(deltaTime)
            }
        })
        hasAnimation && (this.dispatchEvent('content_changed'))
        
        
        
		// let vrActive = viewer.renderer.xr.isPresenting;
		// if(vrActive){
		// 	this.update(this.clock.getDelta(), timestamp);
		// 	this.render();
		// }else{

		// 	this.update(this.clock.getDelta(), timestamp);
		// 	this.render();
		// }

        
		
		Potree.framenumber++;
        
         
        //-------------
        this.images360.tileDownloader.update() 
        this.images360.panoRenderer.update() 
        this.images360.getNeighbours(this.interacted)
        
        
        
        this.computeShelter()
        //-------------
        
        
        
		if(this.stats){
			this.stats.end();
		}
        
        this.warnMemory()   
       
        viewer.addTimeMark('loop','end')
        viewer.addTimeMark('loopWaitNext','start')
        this.computeFps() 
		this.resolveTimings(timestamp, Potree.measureTimings);
        //Potree.measureTimings = 1
	}
    
    warnMemory(){//内存高于2000可能崩溃
        if(!performance.memory)return //国产麒麟firefox不支持
        let size = performance.memory.usedJSHeapSize / 1e6 
        let minSize = 1500, maxSize = 3000, intervalTime = math.linearClamp(size, [minSize, maxSize*1.2], [20000, 3000])
        if(size > minSize){ 
            Potree.Common.intervalTool.isWaiting('processPriorityQueue', () => {  
                size = Math.round(size)
                let L = math.linearClamp(size, [minSize, maxSize], [1, 0.5]);  //L从白到红是1到0.5
                Potree.Log('warning！内存告急！usedJSHeapSize:' + size ,  {   
                    font: {
                        color:  "#"+new THREE.Color().setHSL(0,1,L).getHexString()
                    }
                })
            }, intervalTime); 
        }
    } 
    
    computeFps11(){ 
        let marks = performance.getEntriesByName("loop-start");
        
        let start = performance.now()
        if(marks.length && !document.hidden){//每次都获取最后一个加入列队。因为marks会定期清除，所以自己记录一个列队。（hidden时手动loop的不会计入）
             
            let last = marks[marks.length-1]
            this.fpsCollect.push(last)
            
            let maxCount = 1000
            if(this.fpsCollect.length>maxCount){
                this.fpsCollect.splice(0,1)
            } 
            
            let getFps = (sampleCount, oldValue, requestRendered )=>{
                let samples = this.fpsCollect.slice(-sampleCount)
                let invalidTime = 0
                let lastInvalid, invalidCount = 0  
                samples.forEach((frame,i)=>{ //扣除document.hidden时的时间
                    if((frame.pageHidden || requestRendered && !frame.rendered) && i!=samples.length-1){ //最后一个必须执行下面那段，最后再减1
                        invalidCount ++;
                        lastInvalid || (lastInvalid = frame)
                    }else{
                        if(lastInvalid){
                           invalidTime += frame.startTime - lastInvalid.startTime
                           lastInvalid = null 
                        }
                    }
                })
                
                let dur = (last.startTime - samples[0].startTime - invalidTime) / 1000
                let frameCount = samples.length  - invalidCount - 1 //有效帧数 
                if(frameCount > 1){
                    if(requestRendered){
                        console.log(frameCount,dur,frameCount / dur)
                    }
                    return frameCount / dur  //有的手机高刷可以达到90以上
                }else{ 
                    return oldValue
                }
                
            }
            
            Potree.fps = getFps(70, Potree.fps)//即时
            Potree.fps2 = getFps(maxCount, Potree.fps2) //较长时段
            Potree.fpsRendered = getFps(70, Potree.fpsRendered, true) //一般只有加载东西或渲染的时候才卡，所以渲染过的fps更有意义。 暂时无视地图或其他viewer的渲染 （但一段时间内不一定有渲染，所以不一定得到）
            //缺点：调试时因暂停导致fps变低  
        }
        Potree.lastComFpsDur = performance.now() - start
         
    } 
    
    computeFps(){ 
        let marks = performance.getEntriesByName("loop-start");
        
        let start = performance.now()
        if(marks.length && !document.hidden){//每次都获取最后一个加入列队。因为marks会定期清除，所以自己记录一个列队。（hidden时手动loop的不会计入）
             
            let curFrame = marks[marks.length-1]
             
            let lastFrame = this.fpsCollect.lastFrame
            if(lastFrame && !lastFrame.pageHidden){
                let desc = {
                    dur : curFrame.startTime - lastFrame.startTime
                }
                let joinIn = (name, maxCount)=>{
                    let collect = this.fpsCollect[name]
                    collect.push(desc)
                    collect.durSum += desc.dur
                    if(collect.length > maxCount){
                        collect.durSum -= collect[0].dur
                        collect.splice(0,1)
                    }
                    if(collect.length > 0){
                        collect.fps = collect.length / collect.durSum * 1000
                    }
                }
                joinIn('short',100)
                joinIn('long',5000) 
                if(lastFrame.rendered){
                    joinIn('rendered',30),  joinIn('renderedLong',300)
                    //lastFrame.cameraChanged && (joinIn('camChanged',30),  joinIn('camChangedLong',300))
                }
                 
                Potree.fps = this.fpsCollect.short.fps //即时
                Potree.fps2 = this.fpsCollect.long.fps  //较长时段
                Potree.fpsRendered = this.fpsCollect.rendered.fps //一般只有加载东西或渲染的时候才卡，所以渲染过的fps更有意义。 暂时无视地图或其他viewer的渲染 （但一段时间内不一定有渲染，所以不一定得到）
                Potree.fpsRendered2 = this.fpsCollect.renderedLong.fps  
                /* Potree.fpsCamChanged = this.fpsCollect.camChanged.fps  
                Potree.fpsCamChanged2 = this.fpsCollect.camChangedLong.fps   */
                 
                
            }
             
            curFrame.cameraChanged = this.lastFrameChanged  
            this.fpsCollect.lastFrame = curFrame
             
       }
        Potree.lastComFpsDur = performance.now() - start
         
    }  
    
    
    
	postError(content, params = {}){
		let message = this.postMessage(content, params);

		message.element.addClass("potree_message_error");

		return message;
	}

	postMessage(content, params = {}){
		let message = new Message(content);

		let animationDuration = 100;

		message.element.css("display", "none");
		message.elClose.click( () => {
			message.element.slideToggle(animationDuration);

			let index = this.messages.indexOf(message);
			if(index >= 0){
				this.messages.splice(index, 1);
			}
		});

		this.elMessages.prepend(message.element);

		message.element.slideToggle(animationDuration);

		this.messages.push(message);

		if(params.duration !== undefined){
			let fadeDuration = 500;
			let slideOutDuration = 200;
			setTimeout(() => {
				message.element.animate({
					opacity: 0	
				}, fadeDuration);
				message.element.slideToggle(slideOutDuration);
			}, params.duration)
		}

		return message;
	}
    
    
    
    
    
    getBoundingBox (pointclouds) {
        //可以直接返回viewer.bound
        if(!this.bound){
            this.updateModelBound()
        }
		return this.bound.boundingBox.clone()//this.scene.getBoundingBox(pointclouds);
	};

    updateModelBound(reason){ 
        this.boundNeedUpdate = false
        this.bound = Utils.computePointcloudsBound(this.scene.pointclouds.filter(pointcloud=> //只求可见
            pointcloud.visible || pointcloud.unvisibleReasons && pointcloud.unvisibleReasons.length == 1 && pointcloud.unvisibleReasons[0].reason == 'displayMode'
        )) 
        if(Potree.settings.boundAddObjs){//加上obj的bound   需要确保都updateMatrixWorld过
            this.objs.children.forEach(e=>{ 
                this.bound.boundingBox.union(e.boundingBox.clone().applyMatrix4(e.matrixWorld))
            })
            this.bound.boundingBox.getSize(this.bound.boundSize)
            this.bound.boundingBox.getCenter(this.bound.center)
        }
        
        viewer.farWhenShowPano = this.bound.boundSize.length() * 10//全景漫游时要能看到整个skybox 原本*2的但对于距离特远的数据集需要乘大一些否则会黑面
        
        
       /*  let boundPlane = new THREE.Box3()
        boundPlane.expandByPoint(this.bound.boundingBox.min.clone())//最低高度为bound的最低
        boundPlane.expandByPoint(this.bound.boundingBox.max.clone().setZ(this.bound.center.z))//最高高度为bound的中心高度
        FirstPersonControls.boundPlane = boundPlane */
        //FirstPersonControls.standardSpeed = THREE.Math.clamp( Math.sqrt(this.bound.boundSize.length() )/ 100 ,   0.02,0.5); //在这个boundPlane中的速度
        Potree.settings.editType == 'pano' && this.images360.updatePanoBound()

        viewer.scene.pointclouds.forEach(e=>{//海拔范围
            e.material.heightMin = this.bound.boundingBox.min.z
            e.material.heightMax = this.bound.boundingBox.max.z
        })
        this.dispatchEvent({type:'updateModelBound'})
        
        
    }
    
    waitForLoad(object, isLoadedCallback){//等待加载时显示loading。主要是贴图
        this.waitQueue.push({
            object,
            isLoadedCallback,
        }) 
        //console.warn('waitForLoad',object.id,this.waitQueue.length)
        1 === this.waitQueue.length && this.dispatchEvent({type:"loading", show:true})
    }
    ifAllLoaded( ){
        if(this.waitQueue.length>0){
            this.waitQueue = this.waitQueue.filter(function(e) {
                return !e.isLoadedCallback()
            })  
        }
        //console.warn('ifAllLoaded',  this.waitQueue.length)
        0 === this.waitQueue.length && this.dispatchEvent({type:"loading", show:false}) 
    } 
    cancelLoad(object){//add 突然出现还没加载完就被deactivateTiledPano但还在loading的情况，所以加了这个
        this.waitQueue = this.waitQueue.filter(function(e) {
            return  e.object != object
        })  
        //console.log('cancelLoad',  object.id)
        this.ifAllLoaded()
    }
     
    setView(o={}){
        let callback = ()=>{
            if(o.displayMode){
                Potree.settings.displayMode = o.displayMode
            }
            if(!o.pano && o.currentPano )this.images360.currentPano = o.currentPano
            o.callback && o.callback()
        } 
        
        if(o.pano != void 0){//pano 权重高于 position
            this.images360.flyToPano(o)
        }else{
            this.mainViewport.view.setView($.extend({},o, {callback}))
        }  
    }
    
    
     
    //设置点云为标准模式 
    setPointStandardMat(state, pointDensity, fitPointsize){
        console.log('setPointStandardMat',state)
        if(state){
            if(this.pointStatesBefore){
                return console.warn('已设置过pointStatesBefore！')
            }
            this.pointStatesBefore = {
                opacity : new Map(), 
                size: new Map(), 
                density:Potree.settings.pointDensity,
                useEDL:this.getEDLEnabled(), 
                shape: viewer.scene.pointclouds[0].material.shape
            }
            
            viewer.scene.pointclouds.forEach(e=>{
                this.pointStatesBefore.opacity.set(e, e.temp.pointOpacity)  //因为更改pointDensity时会自动变opacity，所以这项最先获取
                this.pointStatesBefore.colorType = e.material.activeAttributeName; 
                fitPointsize && this.pointStatesBefore.size.set(e,e.temp.pointSize) //这项不一定有用，因为会被后期覆盖
            }) 
            
            if(pointDensity)Potree.settings.pointDensity = pointDensity //万一之后切换到全景模式怎么办 
            if(fitPointsize)Potree.settings.sizeFitToLevel = true 
            
            viewer.scene.pointclouds.forEach(e=>{   
                e.material.activeAttributeName = 'rgba'; 
                e.material.shape = Potree.PointShape['SQUARE']
                fitPointsize && e.changePointSize(Potree.config.material.realPointSize, true) 
                e.changePointOpacity(1)      
            })
            
            viewer.setEDLEnabled(false)
            
        }else{
            if(!this.pointStatesBefore){
                return console.error('未设置过pointStatesBefore！')
            }
            Potree.settings.sizeFitToLevel = false
            if(pointDensity)Potree.settings.pointDensity = this.pointStatesBefore.pointDensity
            
            
            viewer.scene.pointclouds.forEach(e=>{   
                e.material.activeAttributeName = this.pointStatesBefore.colorType
                e.changePointOpacity(this.pointStatesBefore.opacity.get(e)) 
                e.material.shape = this.pointStatesBefore.shape
                
                let size = this.pointStatesBefore.size.get(e)
                if(size) e.changePointSize(size)
                
                
            })
            viewer.setEDLEnabled(this.pointStatesBefore.useEDL)
            
            this.pointStatesBefore = null
            
            
            
            
        }
        
        
    }
    
    
    
    //调试时显示transformControl来调节object
    transformObject(object){
        let seleted = viewer.inputHandler.selection[0]
        if(!object){//取消 
            seleted && viewer.inputHandler.toggleSelection(seleted);
            return
        }
        
        if(seleted && seleted != object){//要更换，先取消
            this.transformObject(null)
        }
        
        if(!object.boundingBox){
            object.boundingBox = new THREE.Box3() //任意大小 只是为了显示黄色外框
            //??? computeBoundingBox
        } 
        if(!viewer.inputHandler.selection.includes(object)){
            viewer.inputHandler.toggleSelection(object);   
        }
    }
    
    pointInWhichPointcloud(pos){//选择最接近中心的那个 使用boundSphere 
        let result = Common.sortByScore(this.scene.pointclouds,[],[
            (pointcloud)=>{ 
                var size = pointcloud.pcoGeometry.tightBoundingBox.getSize(new THREE.Vector3)
                var center = pointcloud.bound.getCenter(new THREE.Vector3)
                var length = size.length() / 2
                var dis = pos.distanceTo(center);
                return length / dis  //到数据集中心的距离占数据集大小越小越好
            }
        ])
        //若要求更准确的话，可以使用ifContainsPoint判断一下是否在bound中
        let r = result[0];
        return r && r.score > 1 ? result[0].item : null  
    }
    
    createHackMesh(){//为了防止无depthTex的全景在pick点云时画面中仅有一个材质时会黑屏，所以在镜头前再加一个mesh。具体bug表现见bug记录。 
        if(this.scene.pointclouds.every(e=>e.hasDepthTex) || viewer.images360.panos.length == 0)return 
        
        
        
        let mesh = new THREE.Mesh(viewer.images360.panos[0].marker.geometry, new THREE.MeshBasicMaterial({color:"#F00",side:2/* ,depthTest:false */}))
            Potree.Utils.updateVisible(mesh,'show',false)
            
        this.images360.node.add(mesh)
        
         
        let updatePos = ()=>{
            let dir = this.mainViewport.view.direction
            let radius = this.images360.cube.scale.length()
            mesh.position.copy(this.mainViewport.view.position).add(dir.multiplyScalar(radius))//放置skybox之外
        }
        
        
        this.addEventListener('camera_changed', e => {
            if(e.viewport.name == 'MainView' && Potree.settings.displayMode == 'showPanos' && !this.images360.currentPano.depthTex
             && (e.changeInfo?.positionChanged || e.changeInfo?.quaternionChanged)){
                 
                updatePos()
                 
            } 
        })
        
        let judge = ()=>{
            if(!this.images360.currentPano?.depthTex && Potree.settings.displayMode == 'showPanos'){
                Potree.Utils.updateVisible(mesh,'show',true)
            }else{ 
                Potree.Utils.updateVisible(mesh,'show',false)
            }
            
        }
        
        
        this.images360.addEventListener( 'flyToPanoDone', judge)
            
        this.images360.addEventListener( 'endChangeMode', judge)
        

        //不知道如果用点云计算非当前视角下的block会不会黑闪，如热点遮挡计算

    }
    /*  createRoomEv(){ 
        
        const environment = new RoomEnvironment();
        const pmremGenerator = new THREE.PMREMGenerator( this.renderer ); 
    } 
     */

    setLoaders(){
        this.fileManager = new THREE.LoadingManager(); //整体的load manager
        this.fileManager.onLoad = () => {
            console.log('All resources have been loaded');
            this.fileManager.loading = false
            this.dispatchEvent('managerOnLoad')
            // 在这里可以执行模型渲染、动画等操作
        };

        // 设置加载进度的回调函数（可选）
        this.fileManager.onProgress = (item, loaded, total) => {
            if(loaded < total) this.fileManager.loading = true
            console.log(`Loading ${item}: ${loaded} of ${total}`);
        };

        // 设置加载失败的回调函数（可选）
        this.fileManager.onError = (url) => {
            console.error(`Failed to load resource: ${url}`);
        };
        
        loaders = {
            objLoader : new OBJLoader( this.fileManager ),
            mtlLoader : new MTLLoader( this.fileManager ),
            glbLoader : new GLTFLoader(undefined, this.renderer, Potree.settings.libsUrl ),
            plyLoader : new PLYLoader( this.fileManager ),
            dxfLoader : new DxfLoader(),
            shapeLoader: new Potree.ShapefileLoader()
        }
    }

    modelLoaded(object, fileInfo_={}, done){//普通模型加载完以后
        object.isModel = true
        let boundingBox = new THREE.Box3()
        if(fileInfo_.parentInfo){
            object.name = fileInfo_.name   
            fileInfo_.parentInfo.loadedCount ++
            fileInfo_.parentInfo.modelGroup.add(object) 
            if(fileInfo_.parentInfo.loadedCount == fileInfo_.parentInfo.url.length){ 
                return this.modelLoaded(fileInfo_.parentInfo.modelGroup, fileInfo_.parentInfo, done)
            }else{ 
                return
            }   
        }
        
        object.name = fileInfo_.name != void 0 ? fileInfo_.name : fileInfo_.fileType
        object.fileType = fileInfo_.fileType
        object.boundingBox = boundingBox  //未乘上matrixWorld的本地boundingBox
        //object.scale.set(1,1,1);//先获取原始的大小时的boundingBox
        object.opacity = 1 //初始化 记录
        object.updateMatrixWorld()
        
        if(fileInfo_.id != void 0)object.dataset_id = fileInfo_.id
        
        
        fileInfo_.loadCostTime = Date.now() - fileInfo_.loadStartTime
        /* let weight = Math.round((total / 1024 / 1024) * 100) / 100;*/
        console.log( '加载完毕:', fileInfo_.name, Common.getNameFromURL(fileInfo_.url), '耗时(ms)', fileInfo_.loadCostTime, /* 模型数据量：' + weight + 'M' */)
          
           
        if(fileInfo_.fileType == '3dTiles'){
            let isGroup = !object.runtime  
            let children = object.runtime ? [object] : object.children
            
            
            children.forEach(object =>{
                let boundingBox_ = new THREE.Box3()
                
                
                let tileset = object.runtime.getTileset()
           
                //TileHeader: tileset.root 
                //参见另一个工程 TileRenderer.js  preprocessNode //这个坐标位置几万…… let data = boundingVolume.halfAxes  //但这个似乎是premultiply( transform );过后的，可能需还原下
                
                let json = tileset.tileset   
                let box = json.root.boundingVolume.box
                 
                if(box){
                    let center = new THREE.Vector3(box[0],box[1],box[2])
                    let boundSize = new THREE.Vector3( )  
                     
                    // get the extents of the bounds in each axis
                    let vecX = new THREE.Vector3( box[ 3 ], box[ 4 ], box[ 5 ] )
                    let vecY = new THREE.Vector3( box[ 6 ], box[ 7 ], box[ 8 ] );
                    let vecZ = new THREE.Vector3( box[ 9 ], box[ 10 ], box[ 11 ] );

                    const scaleX = vecX.length();
                    const scaleY = vecY.length();
                    const scaleZ = vecZ.length(); 
                    
                    boundingBox_.min.set( - scaleX, - scaleY, - scaleZ );
                    boundingBox_.max.set( scaleX, scaleY, scaleZ );
                    
                    if(isGroup){//如果是多个拼成的，每个都保留原先在parent中的offset。 如果是外层，作为独立个体，不用理会位置信息，直接放中央。
                        object.position.copy(center)
                        object.position.z *= -1
                        boundingBox_.translate(object.position) //由于是内层，其位移会改变整体的boundingbox
                    }
                    
                }else if(json.root.boundingVolume.sphere){
                    let sphereData = json.root.boundingVolume.sphere
                    let center = new THREE.Vector3(...sphereData)
                    let radius = sphereData[3] / 2
                    /* let sphere = new THREE.Sphere(center, radius) 
                    let box = sphere.getBoundingBox()
                    boundingBox.copy(box) */
                     
                    boundingBox_.min.set( - radius, - radius, - radius );
                    boundingBox_.max.set( radius, radius, radius );
                    
                    
                    
                }else{
                    return console.error('json boundingVolume 缺少信息') 
                }
                
                //中心点居然没用。可能是漏用了什么信息，也许这和LVBADUI_qp是散的有关。
                //console.log('3d tiles json',json)
                
                json.root.refine = 'ADD';
                json.refine = 'ADD';
                    
                
                boundingBox.union(boundingBox_)
                
            })
            
            
            
            
        }else { 
            Potree.Utils.setObjectLayers(object,'model')  
            
            
            object.traverse( ( child )=>{ 
                let is = child.isMesh || child instanceof THREE.Points || child.isLine
                
                if (is){
                    
                    child.renderOrder = Potree.config.renderOrders.model;
                    //if(Potree.settings.boundAddObjs){
                        child.geometry.computeBoundingBox()
                        //console.log(child.matrixWorld.clone())
                        boundingBox.union(child.geometry.boundingBox.clone().applyMatrix4(child.matrixWorld)) //但感觉如果最外层object大小不为1，要还原下scale再乘
                    //}//获取在scale为1时，表现出的大小
                    //Potree.Utils.makeTexDontResize(child.material.map) 
                    //console.log(child.name, 'roughness',child.material.roughness,'metalness',child.material.metalness)
                       
                   
                    let changeMat = (oldMat)=>{
                        let mat = oldMat
                        if(fileInfo_.unlit && (!(oldMat instanceof BasicMaterial) /* || object.fileType == 'glb' */)){ //注释掉是因为已经写入到loader文件里了
                            //mat = new THREE.MeshBasicMaterial({map:oldMat.map})
                            mat = new BasicMaterial({map : oldMat.map, opacity: oldMat.opacity, color: oldMat.color})  //很奇怪glb的图会使原本的MeshBasicMaterial 会偏暗，所以自己重新写
                            //oldMat.dispose() 
                        } 
                        if(fileInfo_.useStandandMat && !(oldMat instanceof THREE.MeshStandardMaterial)){
                            mat = new THREE.MeshStandardMaterial()
                            mat.roughness = 0.7
                            mat.metalness = 0.5
                        }  
                        //纯色的还是不能用BasicMaterial
                        return mat
                    }
                    if(child.material instanceof Array){//obj
                        child.material = child.material.map(m=>changeMat(m))
                    }else{
                        child.material = changeMat(child.material)
                    }
                   
                   
                    
                    
                } 
            } );
        }
        this.objs.add(object) 
        
        
        if(fileInfo_.transform){
            let setTransfrom = (name)=>{
                let value = fileInfo_.transform[name]
                if(value == void 0)return
                if(value instanceof Array){
                    object[name].fromArray(value)
                }else{ 
                    object[name].copy(value)
                }
            } 
            setTransfrom('position')
            setTransfrom('rotation')
            setTransfrom('scale')
              
        }
         
        
        if(fileInfo_.moveWithPointcloud){
            object.updateMatrix();
            object.matrixAutoUpdate = false
            object.matrix.premultiply(viewer.scene.pointclouds[0].transformMatrix) //默认跟随第一个数据集
            object.matrixWorldNeedsUpdate = true 
        }
        object.updateMatrixWorld()
        MergeEditor.getBoundCenter(object) //初始化       
        done && done(object, fileInfo_)
            
        this.dispatchEvent({type:'modelLoaded',model:object})
        
        
        
        //如果需要点击出现transform工具需要它有select事件 如 viewer.objs.children[1].addEventListener('select',()=>{})
    }
    
    
    
    
    async loadModel(fileInfo, done, onProgress_, onError){ 
        console.log('开始加载', fileInfo.name, Common.getNameFromURL(fileInfo.url) )
    
        let boundingBox = new THREE.Box3()
        
        if(fileInfo.objurl){ 
            /* fileInfo.url = fileInfo.objurl,    */fileInfo.fileType = 'obj'   //兼容最早的 
        } 
        
        
        if(fileInfo.url instanceof Array){
            if(fileInfo.url.length == 1){
                fileInfo.url =  fileInfo.url[0]
            }else{
                fileInfo.loadedCount = 0  
                fileInfo.modelGroup = new THREE.Object3D; //parentGroup.name = fileInfo.title
                fileInfo.url.forEach((url,i)=>{
                    let fileInfoS = Common.CloneObject(fileInfo)
                    fileInfoS.url = url  
                    fileInfoS.name = 'child-'+i
                    fileInfoS.parentInfo = fileInfo
                    this.loadModel(fileInfoS, done, onProgress_, onError)
                })  
                return
            }
        }
        fileInfo.url = Common.dealURL(fileInfo.url) //去除'+'
        fileInfo.loadStartTime = Date.now()   
        //let fileType =  fileInfo.tilesUrl ? '3dTiles' :  fileInfo.objurl ? 'obj' : 'glb'
         
        
        let loadDone = (object,   fileInfo_   )=>{ 
            this.modelLoaded(object,   fileInfo_ || fileInfo  , done)
        }
        
        
        let onProgress = function ( xhr ) {
            if ( xhr.lengthComputable ) {
                let percentComplete = xhr.loaded / xhr.total * 100;
                //console.log( Math.round(percentComplete, 2) + '% downloaded' ); 
                onProgress_ && onProgress_(percentComplete)
            }  
        };
    
    
    
        if(fileInfo.fileType == 'obj' && !fileInfo.objurl){
            let a = fileInfo.url.split('/') 
            let tails = a.pop().split('.') 
            let head = a.join('/') + '/'
            let name = tails[0],  fileType = tails[1]
            if(fileType == 'obj'){
                fileInfo.objurl || (fileInfo.objurl = fileInfo.url)
                fileInfo.mtlurl || (fileInfo.mtlurl = head + name + '.mtl')
            }else{
                fileInfo.fileType = 'glb'
            }
        }
    
    
        if(fileInfo.fileType == 'obj'){ //暂时不支持数组
            if(fileInfo.mtlurl){ 
                loaders.mtlLoader.load( fileInfo.mtlurl , (materials)=>{ 
                    materials.preload(); 
            
                    loaders.objLoader.setMaterials( materials ).load(fileInfo.objurl, (object, total)=>{  
                        loadDone(object/* , total, fileInfo.objurl */)
                    }, onProgress,  onError )
                } , onProgress,  onError  );  
            }else{
                loaders.objLoader.load(fileInfo.objurl, (object, total)=>{  
                    loadDone(object)
                }, onProgress,  onError)
            }
        }else if(fileInfo.fileType == 'glb'){ 
            loaders.glbLoader.unlitMat = true//!!fileInfo.unlit
            loaders.glbLoader.load(fileInfo.url,  ( gltf, total )=>{    
                console.log('loadGLTF', gltf)
                let model = gltf.scene
                if(gltf.animations.length){
                    //let skeleton = new THREE.SkeletonHelper( model );
					//skeleton.visible = true;
					//model.add( skeleton ); 
                    /* viewer.scene.scene.add(skeleton)
                    model.skeletonHelper = skeleton //注意：不能覆盖model.skeleton，因其另有 */
                    
                    let mixer = new THREE.AnimationMixer( model);
                   
                    gltf.animations.forEach(ani=>{
                        let action = mixer.clipAction( ani ); 
                    })
                    model.aniMixer = mixer
                }
                model.gltf = gltf
                
                
                
                loadDone(model) 
            }, onProgress, onError)
            
        }else if(fileInfo.fileType == 'ply'){
            loaders.plyLoader.load( fileInfo.url, (geometry) => {
                let object
                console.log('ply加载完毕', geometry)
                if(!geometry.index){//点云 
                    object = new THREE.Points(geometry, new THREE.PointsMaterial({vertexColors:true, size:0.02})) 
                    //141M的点云，intersect费时300ms以上
                }else{//mesh
                    object = new THREE.Mesh(geometry)    
                }       
                loadDone(object)
            })
            
        }else if(fileInfo.fileType == '3dTiles'){ 
                        
            let result = await Loader3DTiles.load({
                url: fileInfo.url, 
                gltfLoader : loaders.glbLoader, 
                //renderer: SceneRenderer.renderer   
                options: {      
                    //dracoDecoderPath: '../utils/loaders/DRACOLoader/draco',
                    //basisTranscoderPath: '../utils/loaders/KTX2Loader/basis',
                    maximumScreenSpaceError: fileInfo.maximumScreenSpaceError || 80 ,  //越小越清晰。           如果本身tiles很密很小这个值就不能很大。
                    //maxDepth: 100, 
                    //maximumMemoryUsage: 100, //缓存大小，见tiles3DMaxMemory。单位M（但实际结果是 2.5*maximumMemoryUsage + 750  。超过2G会崩, 所以应该小于540） 若太小，密集的tile反复加载很卡. （任务管理器刷新网页后若内存不掉就要结束进程否则虚高）
                    debug: browser.urlHasValue('tilesBox'),  //show box  
                    parent: this.scene.scene, 
                    is4dkk: fileInfo.is4dkk,//是否是4dkk中的模型. 通常maximumScreenSpaceError需要10
                    updateTime: fileInfo.updateTime, //加后缀防止缓存
                },  
            })  
            //console.log(result)
            result.model.runtime = result.runtime
 
               
            let loaded = false
            let tileset = result.runtime.getTileset()
            tileset.addEventListener('endTileLoading', function (data) {//Tileset3D
                if (data.loadingCount == 0 && !loaded) {
                    loaded = true; 
                    //console.log('loaded!!!!!!!!!!!!!')
                }
            });
            tileset.addEventListener('tileLoaded',(e)=>{ //每一个tile加载完要更改透明度
                let master = result.model.parent == this.objs ? result.model : result.model.parent//最多两层 
                MergeEditor.changeOpacity(e.tileContent,  master.opacity)
                if(master.panos) viewer.images360.judgeModelMat(e.tileContent)
                //set Layers ?
                Potree.Utils.setObjectLayers(e.tileContent, 'model')  
           
            })
            
            { 
                let vi = true
                Object.defineProperty( result.model, "visible", {
                    get: function() {
                        return vi 
                    },
                    set: function(v) { 
                        vi = v 
                        result.model.visiChangeCallback()
                    }  
                })  
            }
            let v = true
            result.model.visiChangeCallback = ()=>{
                let visi = result.model.realVisible()
                tileset.visible = visi;  //同步，使不加载 
                if(v != visi){
                    tileset.nextForceUpdate = true
                    v = visi
                } 
            }
            loadDone(result.model/* , null, fileInfo.url */) 
            
        }else if(fileInfo.fileType == 'dxf'){
            loaders.dxfLoader.load(fileInfo.url,(object)=>{
                loadDone(object)
            },fileInfo) 
        }else if(fileInfo.fileType == 'shp'){
            /* if(viewer.transform){
                loaders.shapeLoader.transform = (v)=>{ 
                    let a = viewer.transform.lonlatTo4550.inverse(v)
                    return viewer.transform.lonlatToLocal.forward(a)
                }  

                //loaders.shapeLoader.transform = viewer.transform.lonlatToLocal.forward;
            } */
            const shp = await loaders.shapeLoader.load(fileInfo.url, fileInfo.color);
            const shpModel = shp.node
            
            loadDone(shpModel)
            
        }else if(fileInfo.fileType == '3dgs'){
             
            const gsViewer = new GaussianSplats3D.Viewer({  
               'dynamicScene': true, //只有加上这个sh光影才会跟随模型位置变化而变化
                rootElement: this.renderArea,
                threeScene: this.scene.scene,
                renderer: this.renderer,
                camera:  this.mainViewport.camera,
                useBuiltInControls: false,
                //dropInMode: true,
                logLevel:10, //console info
                antialiased: fileInfo.antialiased,
                sharedMemoryForWorkers: location.host.includes("www.4dmodel.com") ? false : undefined ,   //否则 报错 SharedArrayBuffer transfer requires self.crossOriginIsolated.  本地已经配置所以不会
                sphericalHarmonicsDegree:  2   //最大支持的sh Level
            });
            //let path = Potree.resourcePath+'/models/gaussian/bonsai.ksplat';
             
            
            gsViewer.addSplatScene(fileInfo.url, {
                  'progressiveLoad': true
                })
                .then(() => { 
                    gsViewer.start(); 
                    //loadDone(gsViewer.splatMesh)        //放这里才能看到逐步加载的过程，但会导致加载不完整。        
                    gsViewer.splatMesh.updateMatrix()
                    gsViewer.splatMesh.updateMatrixWorld() 
                    gsViewer.splatMesh.gsViewer = gsViewer
                    gsViewer.splatMesh.onSplatTreeReadyCallback = ()=>{ 
                        loadDone(gsViewer.splatMesh) 
                        let {sceneMax,sceneMin} = gsViewer.splatMesh.splatTree.subTrees[0]
                        gsViewer.splatMesh.boundingBox.min.copy(sceneMin)
                        gsViewer.splatMesh.boundingBox.max.copy(sceneMax) 
                    } 
                    let selfRaycaster = new GaussianSplats3D.Raycaster
                    gsViewer.splatMesh.raycast = function(raycaster, intersects ){//重写
                        let hits = []
                        selfRaycaster.ray.setParameters(raycaster.ray.origin, raycaster.ray.direction)
                        selfRaycaster.intersectSplatMesh(gsViewer.splatMesh, hits) 
                        hits.forEach(e=>{
                            e.object = gsViewer.splatMesh
                            e.point = e.origin
                            delete e.origin
                        })
                        intersects.push(...hits)
                    } //问题：感觉normal不准
                    

                    let updateRegion = ()=>{
                        gsViewer.update() //load
                        if(!gsViewer.splatMesh.visibleRegionChanging){
                            viewer.removeEventListener('update',updateRegion)
                        }else{
                            viewer.dispatchEvent('content_changed') 
                        }
                    }
                    viewer.addEventListener('update',updateRegion)
 
                });
            
        
            //window.gsViewer = gsViewer
            
            viewer.addEventListener('render.begin2',(e)=>{
                if(e.name == 'scene'){ //gsViewer.selfDrivenUpdate()
                    gsViewer.update()
                    if(gsViewer.initialized && gsViewer.splatRenderReady){
                        
                    }  
                }
            })
            
        }
        
        
         
    }
    
    removeModel(model){
        this.objs.remove(model);
        let dispose = (e)=>{
            e.geometry && e.geometry.dispose() 
            e.material && e.material.dispose()
        } 
        model.traverse(e=>{
            dispose(e) 
        })
           
        if(Potree.settings.boundAddObjs){
            this.updateModelBound() 
        }
    }
    
     
    
    setAllTilesets(){//让所有tileset执行fun。    objs里每个model最多两层tileset
        let models = arguments.length == 2 ? [arguments[0]] : this.objs.children //如果要设定某个model的tileset，就传第一个参数
        let fun = arguments[1] || arguments[0]
        
        models.forEach(e=>{
            if(e.fileType == '3dTiles'){
                e.traverse(child=>{
                    if(child.runtime){
                        fun(child)
                        return {stopContinue:true}
                    }
                })
                
            }
        }) 
    }
     
    
    setDisplay(state, cause='setDisplay'){//如果创建了iframe，主页的需要隐藏的话需要释放一些内存出来。iframe关闭前也释放下比较保险
        state = !!state
      
        this.setAllTilesets(model=>{
            let tileset = model.runtime.getTileset()
            Potree.Utils.updateVisible(model, cause, state)
            if(!state) tileset._cache.trim(); //使下一次update时dispose所有不可见的tiles
            model.runtime.update(16, this.renderer, this.mainViewport.camera, true)
            if(state) this.dispatchEvent('content_changed') 
        })
        
        if(state){
            Potree.pointBudget = 6*1000*1000 //先随便写一个, 随后mergeEditor.updateMemoryUsage
        }else{
            Potree.pointBudget = 0
            Potree.updatePointClouds(this.scene.pointclouds,  this.mainViewport.camera,  this.mainViewport.resolution )
            this.images360.panoRenderer.disposeIdelTargets() //如果也能清空当前使用的就好了，但是恢复就需要时间
            this.images360.depthSampler.clearTexData()
        }
        this.dispatchEvent({type:'setDisplay',state})
        
        this.paused = !state  
    }
     
      


     


      
    addFire(){   
  
        if(Potree.settings.number == 't-CwfhfqJ'){
            let position = Potree.Utils.datasetPosTransform({
                pointcloud:viewer.scene.pointclouds[0], 
                position: new THREE.Vector3(4.4318,-0.580291847759, -0.78),
                fromDataset:true 
            }) 
            
            viewer.modules.ParticleEditor.addParticle( {
                 type:'fire',
                 positions:[position],
                 radius:0.42, 
                 height:10,
            })
             
            viewer.modules.ParticleEditor.addParticle( {
                 type:'smoke',
                 positions: [ new THREE.Vector3().addVectors(position,new THREE.Vector3(0,0,0.3))],
                 positionStyle : 'sphere' , 
                 positionRadius : 0.3,                        
                 sizeTween: [[0, 0.3, 0.9, 1], [0.05, 0.1,  1,   0.8]],
                 opacityBase : 0.2,
                 opacityTween :[ [0, 0.3,  0.7, 0.95, 1], [0, 0.2, 1 , 0.1, 0] ], 
                 velocityBase     : new THREE.Vector3( 0,  0,  1),
                 velocitySpread   : new THREE.Vector3( 0.2, 0.2, -0.3), 
                 accelerationBase : 0.2,
                 accelerationSpread : 0.7,	
                 radius:0,
                 //particlesPerSecond : 30,
                 particleDeathAge   : 3.0,                         
            })
            
            viewer.modules.ParticleEditor.addParticle( {
                 type:'explode',
                 name:'fire splash',
                 position: new THREE.Vector3().addVectors(position,new THREE.Vector3(0,0,0.3)), 
                 size: 0.1,
                sizeRange: 0.3,
                sizeTween:[[0, 0.05, 0.3, 0.45], [0, 0.02, 0.1, 0.05] ],
                opacityTween:  [[0, 0.05, 0.3, 0.45], [1, 1, 0.5, 0]] , 
                speed : 1,            //sphere
                speedRange : 4,
                radius: 0.1,
                acceleration : 0.3,         
                accelerationRange : 1,
                particleSpaceTime:0,
                strength:4,
            })
        }
    }


        
    
    
    addVideo(){
        if(Potree.settings.number != 'SS-t-P6zBR73Gke')return
        var geo = new THREE.PlaneGeometry(1, 1, 1, 1)
        
        var videoInfo = this.videoInfo = [ 
            {
                id: '40-2', 
                url: 'https://laser-oss.4dkankan.com/testdata/SS-t-P6zBR73Gke/temp/poi/2022/05/10/0aabafee-36b8-455d-9c11-0780bf694786.mp4',
                rotation:[-1.494468618954883,   -1.4987317433158989,  -3.061254983446741],
                position:[ 19.801820617361624,  2.884673619844108,   -0.03362305858221648],
                scale:[3.5741423153151763,  2.8738725275578703, 1], 
            },

            
            { 
                id: 40,
                /* rotation:[-1.534692822378723, 0.01083403560862361,  3.141535283661569],
                position:[17.2934294239949861, 2.413510747928117, -0.008057029580231356], */
                url: 'https://laser-oss.4dkankan.com/testdata/SS-t-P6zBR73Gke/temp/poi/2022/05/09/7896d6ef-a2d6-4fd7-949c-768782a5b484.mp4',
             
                rotation:[-1.5487684197910518,   0.021848470169552752, -3.1387534893955236],
                position:[17.277316608096, 2.0840432922115846,  -0.0931149415437065],
                scale:[2.0821757723834047, 0.6129478480765236, 1], 
                visibles: [40]
            },
             
        ]
        let add = (info)=>{
            var video = $(`<video  controls="controls" loop autoplay x5-playsinline="" webkit-playsinline="true" playsinline="true" controlslist="nodownload"></video>`)[0]
            video.setAttribute("crossOrigin", 'Anonymous') 
            video.src = info.url || Potree.resourcePath+`/video/${Potree.settings.number}/${info.id}.mp4`
            
            var map = new THREE.VideoTexture(video); 
            var plane = this.videoPlane = new THREE.Mesh(geo, new THREE.MeshBasicMaterial({
                color:"#ffffff", 
                transparent: !0,
                depthTest:false,
                opacity:0 ,
                //side:2,            
                map
            }))
            plane.position.fromArray(info.position)  
            plane.rotation.fromArray(info.rotation) 
            info.scale && plane.scale.fromArray(info.scale) 
            this.scene.scene.add(plane)
            info.plane = plane
            plane.boundingBox = new THREE.Box3(new THREE.Vector3(0,-0.5,0),new THREE.Vector3(1,-0.4,0.2))
            video.addEventListener('loadeddata', function(e) {
                 video.play() 
                 if(!info.visibles/* ||!viewer.images360.currentPano || info.visibles.includes(viewer.images360.currentPano.id) */){
                     plane.material.opacity = 1
                 } 
                    
                 info.scale || plane.scale.set(video.videoWidth/1000,video.videoHeight/1000,1)  // 1080 * 1920
                 console.log('video loadeddata', info.id)
            }) 
            
            
            
            if(info.visibles){
                this.images360.addEventListener('flyToPano' ,(e)=>{//飞之前 
                    if(info.visibles.includes(e.toPano.pano.id)){ //出现 
                        setTimeout(()=>{
                            plane.visible = true; 
                            video.currentTime = 0        
                            video.play();
                            if(video.paused){
                                var startPlay = ()=>{
                                    plane.visible && video.play() 
                                    this.removeEventListener('global_mousedown', startPlay)
                                }
                                this.addEventListener('global_mousedown', startPlay)
                            }
                            Potree.settings.zoom.enabled = false
                            
                            transitions.start(lerp.property(plane.material, "opacity", 1 ) , e.toPano.duration*0.4 , ()=>{
                      
                            }, 0,   easing['easeInOutQuad'])  
                        },  e.toPano.duration*0.6)  //时间上不能和消失的重叠 延迟 
                        
                    }else{
                        //消失
                        transitions.start(lerp.property(plane.material, "opacity", 0,  ) , e.toPano.duration*0.4, ()=>{
                            if(!info){
                                plane.visible = false
                                video.pause()
                                Potree.settings.zoom.enabled = true 
                            }
                        }, 0,   easing['easeInOutQuad'])
                    } 
                    
                })
            }
                
            
            
            var startPlay = ()=>{
                video.play() 
                //video.pause()
                //video.currentTime = 0.1;
                this.removeEventListener('global_mousedown', startPlay)
            }
            
            this.addEventListener('global_mousedown', startPlay)
            Potree.settings.isTest && plane.addEventListener('select',(e)=>{console.log(e)})
        }
        

        videoInfo.forEach(info=>{
            add(info) 
        }) 
 
     
     
     
        
        
        /* this.images360.addEventListener('flyToPano' ,(e)=>{//飞之前
            if(Potree.settings.displayMode != 'showPanos') return
            let info = videoInfo[e.toPano.pano.id]
            if(info ){ //出现 
                setTimeout(()=>{
                    plane.visible = true;  
                    plane.position.fromArray(info.position)  
                    plane.rotation.fromArray(info.rotation)
                            
                    video.src = Potree.resourcePath+`/video/${Potree.settings.number}/${e.toPano.pano.id}.mp4`
                    video.play();
                    video.currentTime = 0
                    Potree.settings.zoom.enabled = false
                    
                    transitions.start(lerp.property(plane.material, "opacity", 1 ) , e.toPano.duration*0.4 , ()=>{
              
                    }, 0,   easing['easeInOutQuad'])  
                },  e.toPano.duration*0.6)  //时间上不能和消失的重叠 延迟
                
                
            }
            
            //消失
            transitions.start(lerp.property(plane.material, "opacity", 0,  ) , e.toPano.duration*0.4, ()=>{
                if(!info){
                    plane.visible = false
                    video.pause()
                    Potree.settings.zoom.enabled = true 
                }
            }, 0,   easing['easeInOutQuad'])
            
            
        })
        
        
        
        this.images360.addEventListener('endChangeMode',(e)=>{  //暂时不处理初始加载时就在有视频的点位上的情况
            if(e.mode == 'showPanos'){ 
                let info = videoInfo[this.images360.currentPano.id]
                if(info ){ //出现  
                    plane.visible = true;  
                    plane.position.fromArray(info.position)  
                    plane.rotation.fromArray(info.rotation)
                    plane.material.opacity = 0   
                    
                    video.src = Potree.resourcePath+`/video/${Potree.settings.number}/${this.images360.currentPano.id}.mp4`
                    video.play();
                    video.currentTime = 0
                    Potree.settings.zoom.enabled = false
                    
                    transitions.start(lerp.property(plane.material, "opacity", 1, (e)=>{console.log('fadeIn',e)}) , 300 , ()=>{
              
                    }, 0,   easing['easeInOutQuad'])   
                    
                }  
            }else{
                plane.visible = false; 
                Potree.settings.zoom.enabled = true
            }
            
        })
         
        */
    }
    
    
    
    
    /* addTube(){//加水管 自动生成
        
        if(Potree.settings.number == 't-8KbK1JjubE'){
            
            let boundingBox = new THREE.Box3()
            boundingBox.min.set(-1,-1,-1); boundingBox.max.set(1,1,1)
            
            
            let radius = 0.08;
            let radialSegments = 5 
            let radSegments = Math.PI*2 / radialSegments
            var circlePts = [];//横截面
            for(let i=0;i<radialSegments;i++){
                let angle = radSegments * i;
                circlePts.push(new THREE.Vector2(radius * Math.cos(angle),   radius * Math.sin(angle) ))
            }  
            var count = 0
            var addMesh = (color, path, height)=>{//height:在path之上的高度，负数代表在path之下
                var name = 'cylinder'+count
                var mat = new THREE.MeshStandardMaterial({color,  depthTest:false, roughness:0.4,metalness:0.5}) 
                let linePath = path.map(e=>new THREE.Vector3().copy(e).setZ(e.z+height))
                let geo = MeshDraw.getExtrudeGeo( circlePts, null,{ extrudePath:linePath, tension:0.2}   )
                var mesh = new THREE.Mesh(geo,mat);
                mesh.name = name
                window[name] = mesh
                
                mesh.boundingBox = boundingBox
                mesh.matrixAutoUpdate = false
                mesh.matrix.copy(viewer.scene.pointclouds[0].transformMatrix)
                mesh.matrixWorldNeedsUpdate = true
                
                this.scene.scene.add(mesh);
                 
                count ++
            }
            
            
            let linePath, height 
            
            //地上管子 黄色 
            linePath = [{"x":-109.83,"y":-68.33,"z":-7.52},{"x":-95.17,"y":-59.3,"z":-7.38},  {"x":-38.75,"y":-24.01,"z":-6.01},{"x":0.5,"y":0.19,"z":-3.89},{"x":39.29,"y":24.41,"z":-1.31}
               ,{"x":43.58,"y":27.7,"z":-0.97},{"x":40.22,"y":35.37,"z":-0.67}// 拐弯向右 
               ,   {"x":39.18,"y":36.71,"z":0.35},{"x":38.69,"y":36.04,"z":18.04} // 拐弯向上  
            ]
            height = radius + 0.05;
            addMesh('#b86', linePath, height)
             
             
            
            //地下管子 藍色
            linePath = [{"x":-108.24,"y":-70.61,"z":-7.52}, {"x":-57.8,"y":-39.31,"z":-6.72},{"x":-18.8,"y":-15.35,"z":-5.01},{"x":55.87,"y":31.67,"z":-0.04},{"x":110.53,"y":66.48,"z":5.14}
            ] 
            height = -0.5;
            addMesh('#48a', linePath, height)
              
            
            
        }
        
        
    }  */
    
    
    addTube(datas){//加水管 自动生成
        
        
        for(let number in datas){  
            if(number == Potree.settings.number){
                
                let data = datas[number]
                
                
                
                let boundingBox = new THREE.Box3()
                boundingBox.min.set(-1,-1,-1); boundingBox.max.set(1,1,1)
                
                
                
                
                var index = 0
                var addMesh = ({color, path, height,fromDataset, radius=0.08, datasetId=Potree.settings.originDatasetId, spaceDis, tension=0.1, visiEntity}={})=>{//height:在path之上的高度，负数代表在path之下
                    var name = 'tube_'+index
                    
                
                    let radialSegments = 30//THREE.Math.clamp( Math.round(radius * 800), 10, 40)
                    let radSegments = Math.PI*2 / radialSegments
                    var circlePts = [];//横截面
                    for(let i=0;i<radialSegments;i++){
                        let angle = radSegments * i;
                        circlePts.push(new THREE.Vector2(radius * Math.cos(angle),   radius * Math.sin(angle) ))
                    }
                    
                    var mat = new THREE.MeshStandardMaterial({color,   /* wireframe:true,   depthTest:false,*/  roughness:0.9,metalness:0.3}) 
                    let linePath = path.map(e=>{
                        e instanceof Array && (e = new THREE.Vector3().fromArray(e))
                        let pos 
                        if(fromDataset){
                            //获取：JSON.stringify(viewer.scene.measurements[0].dataset_points.map(e=>Potree.math.toPrecision(e.toArray(),3)))
                            pos = Potree.Utils.datasetPosTransform({ fromDataset: true, position:e, datasetId}) 
                        }else{
                            pos = new THREE.Vector3().copy(e)
                        }
                         
                        return pos.setZ(pos.z+height)
                    })
                    console.log(linePath)
                    let geo = MeshDraw.getExtrudeGeo( circlePts, null,{ extrudePath:linePath, tension, spaceDis}   )
                    var mesh = new THREE.Mesh(geo,mat);
                    mesh.name = name
                    window[name] = mesh
                    
                    mesh.boundingBox = boundingBox
                    mesh.matrixAutoUpdate = false
                    fromDataset || mesh.matrix.copy(viewer.scene.pointclouds[0].transformMatrix)
                    mesh.matrixWorldNeedsUpdate = true
                    
                    this.scene.scene.add(mesh);
                     
                     
                     
                    if(visiEntity){
                        this.modules.SiteModel.bus.addEventListener('buildingChange',(e)=>{
                            Potree.Utils.updateVisible(mesh,'isInEntity', e.entity && e.entity.name == visiEntity)
                        })
                    }
                    
                }
                
                
                while(index < data.length){ 
                    addMesh(data[index])
                    index++
                }
                
            } 
        }
        
        /* 
        可能用到的
        viewer.scene.measurements.forEach(e=>e.edgeLabels.forEach(e=>Potree.Utils.updateVisible(e,'f',false)))
        JSON.stringify(viewer.scene.measurements.find(e=>e.visible).dataset_points.map(e=>Potree.math.toPrecision(e.toArray(),3)))
     
         */
    } 
    
    addSprite(e){//api
        let sprite 
        
        if(e.text != void 0){
            sprite = new TextSprite(e )
        }else{
            let map = texLoader.load(src)
            e.map = map
            sprite = new Sprite(e )
        }
        
        return sprite  
    }
    
};

//------  CLIP  默认clipTask都是clipInside ----------------------
/* 
并集相当于加法，交集相当于乘法。 所有结果都能展开成多个乘积相加。
假设有4个clipBoxes，ABCD,   如果是  A*B + C*D ，那么这是最终结果。  如果是 (A+B)*(C+D) = A*C+A*D+B*C+B*D 
 */
 /* 
let Clips = {
    boxes : [],
    unionGroups : [], //二维数组。最外层要求并集，里层要求交集（如果只有一个元素就是本身）。总结起来就是要求一堆交集的并集
    shaderParams:{},
    needsUpdate : true,

    addClip(box, clipMethod){
        //不允许重复
        if(this.boxes.includes(box)){
            return console.warn('addClip重复添加了box',box)
        }
        
        boxes.push(box)
        
        if(clipMethod == 'any'){//并 
            this.unionGroups.push([box])
        }else if(clipMethod == 'all'){//交
            this.unionGroups.forEach(mixGroup=>mixGroup.push(box))
        }
        this.needsUpdate = true
    },
    
    removeClip(box){
        if(!this.boxes.includes(box)){
            return console.warn('removeClip没有找到该box',box)
        }
        var newGroups = [];
        
        this.unionGroups.forEach(mixGroup=>{
            if(mixGroup.length == 1 && mixGroup[0] == box)return;//直接删除
            newGroups.push(mixGroup.filter(e=>e!=box));
        })
        
        this.unionGroups = newGroups;
        this.needsUpdate = true
    }
    ,
    
    clearClip(){
        this.boxes = [];
        this.unionGroups = []
        this.needsUpdate = true
    }

   
    ,
    
    updateShaderParams(){//没写完 - - 见 pointcloud clip.vs
           
        //uniform mat4 clipBoxes[num_clipboxes]; 
        //uniform int clipBoxGroupCount; 
        //uniform int mixClipIndices[clipboxGroupItemCount]; //把所有的要求都直接放到数组内
         
        
        //这里需要转为Float32Array..？ 参考material.setClipBoxes  
        let everyClipGroupCount = this.unionGroups.map(e=>e.length)  
        
        let mixClipIndices = []
        this.unionGroups.forEach(e=>{
            mixClipIndices.push(...e)
        })
        
        this.shaderParams = {
            num_clipboxes : this.boxes.length,
            clipBoxGroupCount : this.unionGroups.length,
            everyClipGroupCount,
            clipBoxIndexCount: mixClipIndices.length,
            mixClipIndices
        }
        
    } 
    ,
    getShaderParams(){//每次要传递参数到shader中，执行这个就好
        if(this.needsUpdate){
            this.updateShaderParams()
        }
        return this.shaderParams
    }
    
    
    
}
 
 */