fuse-code/src/sdk/cover/index.js

import mitt from 'mitt'

import axios from 'axios' //{ axios } from '@/api'

let requestLoadCount = 0
let maxLoadingCount = 2; //正在加载模型的最大数目
//0看看，1看见，2深时，3用户上传三维模型，4深时mesh,5深光点云，6深光mesh
const ModelTypes = {
    0 : {name:'看看（八目）', panos4dkk:true},
    1 : {name:'看见（双目转台）', panos4dkk:true, rot90:true},
    2 : {name:'深时', },
    3 : {name:'用户上传三维模型'},
    4 : {name:'深时mesh（激光转台）',panos4dkk:true, rot90:true},//3dtiles
    5 : {name:'深光点云' },
    6 : {name:'深光mesh',panos4dkk:true, rot90:true},//3dtiles
}
let cesAspect

export const enter = ({ dom, mapDom, isLocal, lonlat, scenes }) => {
    console.warn('新的页面')
    Potree.settings.isOfficial = true //标记为正式、非测试版本 
    //Potree.fileServer = axios 
    Potree.settings.libsUrl = './lib/'
    let loadStartTime = Date.now()

    //正式环境（本地调试会打不开）
    if (location.host === 'mix3d.4dkankan.com') {
        Potree.settings.urls.prefix = Potree.settings.urls.prefix6
        Potree.settings.webSite = 'datav1'
    } else if (location.host === 'xfhd.4dkankan.com') {
        Potree.settings.urls.prefix = Potree.settings.urls.prefix7
        Potree.settings.webSite = 'datav1'
    }
    const mapBus = mitt(), sceneBus = mitt()


    const tagLimitDis = 8;

    Potree.settings.showCompass = true
    Potree.settings.compassDom = dom.querySelector('#direction') 
    Potree.settings.mergeType2 = true //标识新版
    Potree.settings.modelSkybox = true //是否将全景图贴在模型上（会导致卡顿）。若不显示模型将不显示Reticule
    Potree.settings.tiles3DMaxMemory = 300 //稍微增加点
    Potree.settings.mergeTransCtlOnClick = true
    Potree.settings.canWalkThroughModel = true
    
    
    
    let { THREE } = Potree.mergeEditStart(dom, mapDom)
    let MergeEditor = viewer.modules.MergeEditor
    Potree.settings.unableNavigate = true
    
    /* Potree.settings.showCesium = !!lonlat
    Potree.settings.showCesium && buildMap()
     */
    
    //因为getPose里用的是target，俯视的yaw不准，所以限制一下不要完全俯视
    viewer.mainViewport.view.maxPitch-=0.001
    viewer.mainViewport.view.minPitch+=0.001
    

    viewer.addEventListener('camera_changed', e => {
        var camera = e.viewport.camera
        var pos = camera.position
        if (e.viewport.name == 'MainView') {
            sceneBus.emit('cameraChange', { x: pos.x, y: pos.y, z: pos.z, rotate: camera.rotation })

            updateMap()
            
            Potree.Common.intervalTool.isWaiting('updateCamNear', ()=>{ 
                updateCamNear() 
            }, 1000)
             
            //viewer.scene.tags.children.forEach(tag=>tag.functions.updateVisiFar()) 
             
        } 
    })
    
     
    //-------------------------------------
    let modelAinB = (A,B)=>{ //B的expand(5m) bound完全包含A
        let boundB = B.boundingBox.clone().expandByVector(new THREE.Vector3(5,5,5)).applyMatrix4(B.matrixWorld)
        let boundA = A.boundingBox.clone().applyMatrix4(A.matrixWorld)
        return boundB.containsBox(boundA) 
    }
    
    let changeMeshVisi = (object, show) => {
        if(show == void 0) show = Potree.settings.displayMode == 'showPointCloud' || object == viewer.images360.currentPano.pointcloud && Potree.settings.modelSkybox || object.showInPano  //showInPano: 装饰物，一直显示
                                  || !object.panos && modelAinB(object, viewer.images360.currentPano.pointcloud)  //装饰物
        Potree.Utils.updateVisible(object, 'showPanos', show)
    }
    
    if(Potree.settings.canWalkThroughModel){
        let lastModel 
        viewer.images360.addEventListener('flyToPano',(e)=>{//开始漫游     漫游到另一个模型就要选中这个模型?
            let model = e.toPano.pano.pointcloud
            if(lastModel != model){  
                changeMeshVisi(model, true)
                //MergeEditor.selectModel(model)
                //model.result_.flyInPano(e.toPano.pano, {dontFly:true})   //切换模型显示，因为flyInPano有事件怕乱所以统一用这个函数            
                updateCamNear()
            }
            
        })
        viewer.images360.addEventListener('flyToPanoDone',(e)=>{
            if(!e.makeIt)return
            let model = viewer.images360.currentPano.pointcloud
            if(lastModel != model){ 
                lastModel?.isModel && changeMeshVisi(lastModel, false)
                sceneBus.emit('panoModelChange',  model.result_ )
            }
            lastModel = model
        })
    }
    
     
    viewer.images360.addEventListener('endChangeMode',(e)=>{
        sceneBus.emit('modeChange', {mode: e.mode == 'showPanos' ? 'pano' : 'fuse',  model : e.mode == 'showPanos' && viewer.images360.currentPano.pointcloud.result_} )
         
        Potree.Utils.updateVisible(MergeEditor.transformControls, 'showPanos', e.mode == 'showPointCloud')
        Potree.Utils.updateVisible(MergeEditor.boxHelper, 'showPanos', e.mode == 'showPointCloud')
         
        if(e.mode == 'showPanos'){
            viewer.setControls( viewer.fpControls )
            viewer.removeEventListener('camera_changed', camera_changed)
        }else{ 
            viewer.addEventListener('camera_changed', camera_changed)
        }
         
        viewer.objs.children.forEach((e)=>{changeMeshVisi(e)})
        
        Potree.settings.canWalkThroughModel || viewer.images360.panos.forEach(pano => {
            pano.setEnable(e.mode == 'showPanos' ? pano.pointcloud == viewer.images360.currentPano.model : true)
        })
        
        Potree.settings.unableNavigate = e.mode == 'showPointCloud'
        updateCamNear()
    })
    
    
    let camera_changed = (e) => {
        if (e.viewport.name == 'MainView' && e.changeInfo.positionChanged) {
            //viewer.mainViewport.camera.position
            viewer.mainViewport.view.radius = 0.1 //使pivot在面前一丢丢距离
            viewer.setControls(viewer.orbitControls)
            viewer.removeEventListener('camera_changed', camera_changed)
             
        }
    }
    let requestInPano = false
    //-------------------------------------
    /* viewer.inputHandler.addEventListener('keydown', (e)=>{
        if(e.event.key == "e" ){ 
           MergeEditor.transformControls.mode = 'rotate'
        }else if(e.event.key == "w"){
            MergeEditor.transformControls.mode = 'translate'
        }else if(e.event.key == "s"){
            MergeEditor.transformControls.mode = 'scale'
        }
    }) */

    viewer.addEventListener('webglError', e => {
        console.error('viewer webglError: ' + e)
        let memory = '. \n jsHeapSizeLimit：'+ performance.memory.jsHeapSizeLimit/ 1e6 + ', usedJSHeapSize: '+performance.memory.usedJSHeapSize/ 1e6 + '(M)'
        sceneBus.emit('webglError', { msg: e.msg + memory })
    })
    viewer.compass.setAutoDisplay(true)

    /* mapBus.on('visible', v => {
        //console.log('mapBus visible', v)
        viewer.mapViewer.visible = v
        if (v) {
            viewer.mapViewer.mapLayer.needUpdate = true
        }
        viewer.mapViewer.dispatchEvent({type:'forceVisible',visible:v})
    }) */


    {
        let index = 1;
        //let setDisplay()

        if (!Potree.isIframeChild) {

            /* viewer.addEventListener('createIframe',(e)=>{//创建了子页面 
            }) */
            window.winIndex = 0;

            window.iframeCreated = function (iframe) {
                let child = iframe.contentWindow
                child.winIndex = index++
                //案件里视图提取页面子页面覆盖了父级页面，父级的模型可以隐藏以释放内存

                console.error('createdIframe', child.winIndex, child.location.href)
                viewer.setDisplay(false)

                child.beforeDestroy = function () { //注：在前端仍会找不到beforeDestroy,可能contentWindow变更？？所以手动调用setDisplay
                    console.warn('beforeDestroy', child.winIndex)

                    child.viewer && child.viewer.setDisplay(false)
                    //如果是四维看看的场景，先不管了，页面被销毁应该就没了吧

                    viewer.setDisplay(true)//恢复主页的模型显示


                    if (!child.viewer) {
                        try {
                            let player = child.__sdk.core.get('Player')
                            /* let runtime = player.model._3dTilesRuntime 
                            let tileset = runtime.getTileset() 
                            tileset._cache.trim(); //使下一次update时dispose所有不可见的tiles
                            let sceneRenderer = child.__sdk.core.get('SceneRenderer')
                            player.model.visible = false
                            runtime.update(16, sceneRenderer.renderer, sceneRenderer.camera, true)  //没用，为何_trimTiles的while无法进入
                             */
                            player.model.traverse(e => {
                                e.geometry && e.geometry.dispose()
                                if (e.material) {
                                    e.material.map && e.material.map.dispose()
                                    if (e.material.uniforms && e.material.uniforms.map && e.material.uniforms.map.value) {
                                        e.material.uniforms.map.value.dispose()
                                    }
                                }
                            }) //效果甚微

                            /* let sceneRenderer = child.__sdk.core.get('SceneRenderer')
                            sceneRenderer.renderer.render(sceneRenderer.scene, sceneRenderer.camera)
                             */
                        } catch (e) {
                            console.log(e)
                        }
                    }

                }



            }

            //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
        } else {

        }
    }

    window.THREE = THREE
    //isLocal = false 
    let autoLoads = /* window.autoLoads = */ []
    let readyToAddModel
    

    let mainBackground = viewer.background



    const units = { 1: 'metric', 2: 'imperial' }
    let getMeasureType = function (type, unit = 1) {
        let info
        switch (type) {
            case 'free':
                info = { measureType: 'Distance' }
                break
            case 'area':
                info = { measureType: 'Area' }
                break
            case 'vertical':
                info = { measureType: 'Ver Distance' }
                break
            default:
                console.error('无此 measure type')
        }
        info.unit = units[unit]
        return info
    }
    let getMeasureFunction = function (measure, bus) {

        measure.addEventListener('highlight', (e) => {
            //console.log('3d->2d highlight',e.state)
            bus.emit('highlight', e.state)
        })
        measure.addEventListener('marker_dropped', (e) => {//拖拽结束后发送changeCallBack
            if (measure.parent) {
                //未被删除
                bus.emit('update', [
                    measure.dataset_points.map(p => p.clone()),
                    measure.points_datasets
                ])
            }
        })
        return {
            /* quit: () => {
                Potree.Log('quit结束且删除: ' + measure.id, '#00c7b2')
                viewer.dispatchEvent({ type: 'cancel_insertions', remove: true, measure })
            }, //触发结束。退出测量模式，清除之前操作 */
            destroy: () => {
                viewer.dispatchEvent({ type: 'cancel_insertions', remove: true, measure })
                viewer.scene.removeMeasurement(measure)
            },

            /* getPoints: () => {
                return measure.points
            },
            getDatasetLocations: () => {
                return measure.dataset_points
            },
            getDatasets: () => {
                return measure.points_datasets
            },
            getDatasetId: () => {
                return measure.datasetId
            }, */

            getArea: () => {
                return measure.area //{value:area, string:..}
            },
            getDistance: () => {
                if (measure.points.length < 2) return 0

                var value = measure.points[0].distanceTo(measure.points[1])

                return {
                    value, //米
                    string: measure.getConvertString(value, 'distance')
                }
            },

            //手动开启或关闭:
            show: () => {
                Potree.Utils.updateVisible(measure, 'inListByUser', true)
            },
            hide: () => {
                Potree.Utils.updateVisible(measure, 'inListByUser', false)
            },
            fly() {
                let result = viewer.focusOnObject(measure, 'measure', 1200)

                return result.msg ? result.msg : result.promise
                //返回值 1 deferred 表示即将位移 2 'posNoChange' 表示已在最佳位置 3 'tooFar' 表示距离最佳位置太远 
            },


            changeSelect(isHight) {
                console.log('2d->3d isHight ', isHight)
                measure.setSelected(isHight, 'byList')
            },

        }
    }

    



    let sdk = {
        sceneBus, mapBus,
        
        
        canTurnToPanoMode(pos) { 
            pos = pos ? new THREE.Vector3().copy(pos) : viewer.images360.position

            let pano = viewer.images360.findNearestPano(pos)
            if (pano && pano.position.distanceTo(pos) < Potree.config.panoFieldRadius * pano.pointcloud.scale.x) {
                return {model:pano.pointcloud.result_}
            }
            //poschange后会调用这个，如果返回false会变为点云模式，且不会自动变回原先的模式
        },
        
        
        
        getPositionByScreen(pos2d, hopeModelId) {//通过屏幕坐标获取真实坐标 . hopeModelId： 如果指定了模型，优先返回hopeModelId上的intersect
            //console.log('getPositionByScreen',hopeModelId)
            hopeModelId = null
            let worldPos, localPos, modelId, intersect, normal, localNormal
            let Handler = viewer.inputHandler

            let reGet = () => {//不使用当前鼠标所在位置的intersect，单独算
                pos2d.clientX = pos2d.x
                pos2d.clientY = pos2d.y
                pos2d.onlyGetIntersect = true
                pos2d.whichPointcloud = true
                if (hopeModelId != void 0) {//隐藏其他的模型
                    let models = MergeEditor.getAllObjects()
                    models.forEach(model => {
                        Potree.Utils.updateVisible(model, 'forPick', model.dataset_id == hopeModelId)
                    })
                }
                let intersect2 = Handler.onMouseMove(pos2d)
                if (hopeModelId != void 0) {//恢复
                    let models = MergeEditor.getAllObjects()
                    models.forEach(model => {
                        Potree.Utils.updateVisible(model, 'forPick', true)
                    })
                }
                if (intersect2 && intersect2.location) {
                    intersect = intersect2
                }
            }
            if (pos2d && pos2d.inDrag) {
                reGet()
            } else {
                intersect = Handler.intersect
                if (intersect) {
                    modelId = intersect.pointcloud ? intersect.pointcloud.dataset_id : intersect.object.dataset_id
                    if (hopeModelId != void 0 && modelId != hopeModelId) {
                        reGet()
                    }
                }
            }

            if (intersect && intersect.location) {
                modelId = intersect.pointcloud ? intersect.pointcloud.dataset_id : intersect.object.dataset_id
                /* if(hopeModelId != void 0 && modelId != hopeModelId){
                    return null
                } */
                worldPos = intersect.location.clone()
                localPos = Potree.Utils.datasetPosTransform({ toDataset: true, datasetId: modelId, position: worldPos })
                normal = intersect.normal
                localNormal = intersect.localNormal 
            } else return null
        
            return { worldPos, modelId, normal,  localPos, localNormal }
        },






        getScreenByPosition(pos3d, modelId, canShelter/* , disToCameraLimit */) {//通过模型局部坐标获取屏幕坐标 

            //console.log('getScreenByPoint ')
            let isLocal = modelId != void 0
            pos3d = new THREE.Vector3().copy(pos3d)
            let worldPos = isLocal ? Potree.Utils.datasetPosTransform({ fromDataset: true, datasetId: modelId, position: pos3d }) : pos3d
            if (!worldPos) return


            if (canShelter) {
                if (viewer.inputHandler.ifBlockedByIntersect(worldPos, 0.1, true)) return { trueSide: false };
            }


            var viewport = viewer.mainViewport
            var camera = viewport.camera
            var dom = viewer.renderArea
            if (tagLimitDis != void 0) {
                if (camera.position.distanceToSquared(worldPos) > Math.pow(tagLimitDis, 2)) return false
            }




            //console.log('getScreenByPoint ' + pos3d.toArray())
            return Potree.Utils.getPos2d(worldPos, viewport, dom)
        },

        setCameraFov(fov) {
            viewer.setFOV(fov)
        },
  

        screenshot: (width, height/* , bgOpacity=0 */ ) => {//
            //截图 
            let bgOpacity =  Potree.settings.showCesium  ? 0 : 1        /* viewer.background == 'skybox' */  //因为要画map底图所以上层只能透明。之后需要的话再改
            
            console.log('bgOpacity', bgOpacity)
            
            Potree.Utils.updateVisible(MergeEditor.boxHelper, 'screenshot', false)
            var { getImagePromise, finishPromise } = viewer.startScreenshot({ type: 'default', /* useRenderTarget:true,  */bgOpacity }, width, height)
            var deferred = $.Deferred();
            finishPromise.done(({ dataUrl }) => {
                if(Potree.settings.displayMode != 'showPanos' && Potree.settings.showCesium){//need map background
                    Potree.cesScreenshot(width, height).done((mapBGurl)=>{ 
                        let img = new Image(); img.src = dataUrl
                        let imgBG = new Image(); imgBG.src = mapBGurl
                        let loadCount = 0
                        img.onload = imgBG.onload = ()=>{
                            loadCount++;
                            if(loadCount == 2){
                                let url = Potree.Common.imgAddLabel(imgBG,img,{leftRatioToImg:0,topRatioToImg:0})
                                deferred.resolve(url)
                            }
                        } 
                    })  
                }else{
                    deferred.resolve(dataUrl)
                }
                
                
                Potree.Utils.updateVisible(MergeEditor.boxHelper, 'screenshot', true)
            })

            return deferred.promise()
        },
        getPose() {//获取当前点位和朝向
            
            const camera = viewer.scene.getActiveCamera()
            const target = viewer.scene.view.getPivot().clone()
            const position = viewer.scene.view.position.clone()
            const pose = { position, target,  displayMode:Potree.settings.displayMode }
            if(Potree.settings.displayMode == 'showPanos'){
                let model = viewer.images360.currentPano.pointcloud
                pose.panoId = viewer.images360.currentPano.originID 
                pose.model = model.result_
                 
                pose.posInModel = Potree.Utils.datasetPosTransform({ toDataset: true, position: camera.position.clone(), object:model })
                pose.rotInModel = Potree.Utils.datasetRotTransform({ toDataset: true, quaternion: camera.quaternion.clone(), getQuaternion: true, pointcloud:model }).toArray() //拿第一个数据集
 
            }
            
            //console.log('getPose',position, target)
            return pose
        },
        comeTo(o = {}) {
            //console.log('comeTo',o.position, o.target)
            //飞到某个点  
             
            let deferred = $.Deferred()
            if(o.panoId != void 0){
                let model = o.model.model
                let pano = model.panos.find(a=>a.originID == o.panoId)
                if(pano){
                    o.rotInModel = new THREE.Quaternion().fromArray(o.rotInModel)
                    let quaternion = Potree.Utils.datasetRotTransform({ fromDataset: true, quaternion: o.rotInModel, getQuaternion: true, object:model})  

                    o.model.flyInPano(pano, {quaternion, duration:0, callback(){
                        o.callback && o.callback()
                        deferred.resolve(true)
                    }})
                    return deferred.promise()
                    
                }else{
                    console.warn('没有找到漫游点',o)
                }
            }else if(requestInPano){
                requestInPano.result_.flyOutPano()
            }else{
                if (o.modelId != void 0) {
                    ['position', 'target'].forEach(e => { 
                        if (o[e]) {
                            o[e] = Potree.Utils.datasetPosTransform({ fromDataset: true, datasetId: o.modelId, position: o[e] })
                        }
                    })
                }
            }
            

            if (o.distance) {
                let position = o.target || o.position
                return viewer.focusOnObject({ position }, 'tag', null, { distance: o.distance }).promise
            }
            

            viewer.scene.view.setView($.extend({}, o, {
                duration: o.dur,
                callback: () => {
                    o.callback && o.callback()
                    deferred.resolve(true)
                }
            }))
            return deferred.promise()
        },


        setBackdrop(sky, type, { scale, rotate }) {//天空盒背景
            //console.log('天空盒背景',  sky,type)

            let setGroundAndText = (color) => {
                MergeEditor.secondCompass.dom.find(".dirText").css({ 'color': color })
                viewer.compass.dom.find(".dirText").css({ 'color': color })
                MergeEditor.ground.material.uniforms.uColor.value.set(color)
                //MergeEditor.ground.children[0].material.color.set(color)
            }
            viewer.dispatchEvent('content_changed')
            
             
            if(type == 'map'){
                MergeEditor.setGroundPlaneImg(null)
                viewer.setBackground(mainBackground)
                Potree.settings.showCesium = true
                buildMap()
                viewer.backgroundOpacity = 0
                return
            }else{
                Potree.settings.showCesium = false
            }

            if (type == 'bimg') {//地面图 
                MergeEditor.setGroundPlaneImg(sky, scale, rotate)
                setGroundAndText('#e0e0e0')
                viewer.setBackground(mainBackground)
            } else {
                MergeEditor.setGroundPlaneImg(null)

                if (sky == 'none') {
                    viewer.setBackground(mainBackground)
                    setGroundAndText('#eee')
                } else if (sky[0] == '#') {
                    viewer.setBackground(new THREE.Color(sky))

                    let color = sky == '#fff' ? '#666' : sky == '#333' ? '#eee' : '#bbb'  //反相
                    setGroundAndText(color)
                } else if (type == 'image-map' || type == 'vector-map') {//影像|矢量 地图

                } else {//环境
                    viewer.setBackground('skybox', sky)
                    setGroundAndText('#e0e0e0')
                }

            }


            
        },
        switchMapType(type) {
            let map = viewer.mapViewer.mapLayer.maps.find(e => e.name == 'map')
            map.switchStyle(type/* map.style == 'satellite' ? 'standard' : 'satellite' */)
        },
        enableMap(mapArea, latlng) {

            if (!viewer.mapViewer) {

                //--------------------------------
                viewer.mapViewer = new Potree.MapViewer(mapArea)
                viewer.mapViewer.initProjection()
                //focus
                let boundSize = new THREE.Vector3(200, 150, 1).max(viewer.bound.boundSize)

                viewer.mapViewer.addEventListener('viewerResize', () => {
                    viewer.mapViewer.moveTo(viewer.bound.center, boundSize, 0)
                }, { once: true })

            }
        },


        enterSceneGuide(pathArr) {//导览  (不需要修改参数)
            let editor = viewer.modules.CamAniEditor
            console.log('pathArr', pathArr)

          

            //console.log('enterSceneGuide',pathArr)
            pathArr.forEach(e=>{
                if(e.panoId != void 0){
                    e.model = e.model.model
                }
            })
            let data = {
                //duration: pathArr.slice(0, pathArr.length - 1).reduce(function (total, currentValue) { return total + currentValue.time }, 0), //总时长(要去掉最后一个，因为已到终点，该点time无意义)
                points: pathArr,
                useDurSlice: true
            }
            
            
            
            let ani = editor.createMulAnimation(data)
             
             
            //注：最多只存在一条导览



            let bus = mitt()

            //播放完成
            ani.event_.addEventListener('playDone', () => {
                bus.emit('playComplete')
                viewer.images360.panos.forEach(e=>e.marker && Potree.Utils.updateVisible(e, 'playAni', true))
            })
            //切换点
            ani.event_.addEventListener('updateCurrentIndex', e => {
                bus.emit('changePoint', e.currentIndex + 1)
            })

            return {
                bus,
                play() { 
                    MergeEditor.selectModel(null)
                    viewer.images360.panos.forEach(e=>e.marker && Potree.Utils.updateVisible(e, 'playAni', false))
                    ani.play()
                },
                pause() {
                    viewer.images360.panos.forEach(e=>e.marker && Potree.Utils.updateVisible(e, 'playAni', true))
                    ani.stop()
                },

                clear() { 
                    ani.remove()
                },
            }

        },

        //[path1, paht2], {  time, speed }   
        calcPathInfo(paths, info) { //传入的time， speed仅有一个。返回完整的 time, speed
            //这一版的control似乎无法在某个位置上改变角度，位置和角度一般都是一起变的，所以先不增加单位更换功能。
            let pos1 = new THREE.Vector3().copy(paths[0].position)
            let pos2 = new THREE.Vector3().copy(paths[1].position)
            let dis = pos1.distanceTo(pos2)
            if (info.time != void 0) {
                info.speed = dis / info.time
            } else {
                info.time = dis / info.speed
            }
            return info
        },



        addModel(props) {

            let bus = props.bus = mitt()
            //console.log('addModel',props)
            props.isFirstLoad = isLocal ? props.bottom == void 0 : (props.isDynamicAdded || props.mode == 'single')  // 在编辑时用户添加的 或 展示单个模型 （props.mode='single'模型展示页， props.mode='many'融合页）
            if (props.opacity == void 0) props.opacity = 1
            if (props.type == 'obj') props.type = 'glb'
            props.scale /= 100
            if (props.rotation) {
                if (props.rotation._x == void 0 && props.rotation.x != void 0) {
                    props.rotation = new THREE.Euler().setFromVector3(props.rotation)
                }
            }
            let getDefaultRotation = () => {
                if(ModelTypes[props.fromType]?.rot90 && props.type != 'glb'){
                    return new THREE.Euler(Math.PI / 2, 0, 0)
                } else return new THREE.Euler(0, 0, 0)
            }


            if (!props.isFirstLoad) {
                if (autoLoads.length == 0) { //首次加载
                    setTimeout(() => {
                        let sizes = autoLoads.map(e => e.size || 0)
                        console.log('需要请求加载的模型大小为', sizes, '总大小', sizes.reduce(function (total, currentValue) {
                            let current = parseFloat(currentValue)
                            return total + ((typeof currentValue == 'number' || currentValue.includes('M')) ? current : current / 1024)
                        }, 0))

                        readyToAddModel = true  //准备开始加载
                        loadNext()//startLoad(autoLoads[0])



                    }, 30)
                }
                autoLoads.push(props)
                readyToAddModel = false
            } else {
                readyToAddModel = true

                props.rotation = getDefaultRotation()
            }



            


            

            

            let model
            let done = (model_) => {
                model = model_
                model.result_ = result
                model.props = props
                result.model = model
                model.fromType = ModelTypes[props.fromType].name
                if (!props.isFirstLoad) {
                    model.visible = false//先不显示，防止卡顿
                }
                model.showInPano = props.raw.showInPano
                props.opacity < 100 && result.changeOpacity(props.opacity)

                model.addEventListener('changeSelect', (e) => {
                    bus.emit('changeSelect', e.selected)
                })
                let lastState = {}
                model.addEventListener('transformChanged', (e) => {
                    let msg = {}
                    if (!lastState.position || !model.position.equals(lastState.position)) {
                        lastState.position = msg.position = model.position.clone()
                    }
                    if (!lastState.rotation || !model.rotation.equals(lastState.rotation)) {
                        lastState.rotation = msg.rotation = model.rotation.clone()
                    }
                    if (lastState.scale == void 0 || model.scale.x * 100 != lastState.scale) {
                        lastState.scale = msg.scale = model.scale.x * 100
                    }

                    msg = Potree.Common.CloneObject(msg)
                    //console.log(msg)
                    bus.emit('transformChanged', msg)
                })
                spliceFromArr(model, props, true)
 
                model.addEventListener('changeSelect', (e) => {
                    MergeEditor.transformControls.visible && e.selected && MergeEditor.transformControls.attach(model, e.clickPos) //: MergeEditor.transformControls.detach()
                }) 

                MergeEditor.modelAdded(model)
                        
                        
                        
                if (props.mode == 'single') {//模型查看页
                    MergeEditor.noNeedSelection = true
                    setTimeout(() => {
                        MergeEditor.focusOn([model], 1000, true, true)
                    }, 1)
                }
                if(ModelTypes[props.fromType].panos4dkk){
                    Potree.load4dkkPanos(props.raw.num, model, getDefaultRotation(), () => {
                        bus.emit('loadDone')
                    },    props.fromType == 0 ? '2k' : '4k' ) //看看场景是2k
                } else {
                    bus.emit('loadDone')
                }



                //console.log('loadDone' )
            }
            let progressFun = (progress) => {
                bus.emit('loadProgress', progress)
            }

            let onError = function (xhr) {
                bus.emit('loadError', xhr)
                console.log('loadError!!!!!!!!!', Potree.Common.getNameFromURL(props.url), props.size, xhr)
                spliceFromArr(model, props, false)
            }

            try {
                props.url = JSON.parse(props.url) //去掉 '\'
            } catch (e) { }

            props.done = done; props.progressFun = progressFun; props.onError = onError


            if (readyToAddModel) {

                if (autoLoads.filter(e => e.loading).length < maxLoadingCount) {
                    startLoad(props)
                }

            }

            let scaleMeasure
            let result = {
                bus,
                model,
                getDefaultRotation,

                supportPano() {  //是否支持全景图
                    return model?.panos?.length > 0
                },
                flyInPano(pano, {dontFly, quaternion, duration}={}) {//  飞入全景图
                    requestInPano = model
                    pano = pano || viewer.images360.findNearestPano(null, model.panos)
                    if (pano) {  
                        dontFly || viewer.images360.flyToPano({ pano, canCancelLast: true, quaternion, duration})
                        Potree.settings.displayMode = 'showPanos' 
                     

                    }
                },
                flyOutPano() {//  飞出全景图（就是切换到正常融合视角）
                    requestInPano = false
                    Potree.settings.displayMode = 'showPointCloud'
                    /* setTimeout(() => {//在下一帧再变，因为3dtiles需要更新一下才会显示tiles 
                        if (!requestInPano) {
                            Potree.settings.displayMode = 'showPointCloud'
                            Potree.Utils.updateVisible(MergeEditor.boxHelper, 'showPanos', true)
                        }
                    }, 50) */

                    
                },



                changeShow(show) {
                    props.show = show  //for autoLoads show model
                    if (model) {
                        Potree.Utils.updateVisible(model, 'datasetSelection', show)
                        if (model.panos) {
                            model.panos.forEach(e => e.setEnable(show))
                        }


                        viewer.dispatchEvent('content_changed')
                    }
                },
                changeSelect(state) {
                    console.error('select', state)
                    if (model) {
                        let fly = viewer.images360.latestRequestMode != 'showPanos'
                        MergeEditor.selectModel(model, state, fly, true)
                        updateCamNear()
 
                        //console.log('changeSelect',  props.id, state)
                    }
                },
                changeScale(s) {
                    if (model) {
                        s /= 100

                        if (model.scale.x == s) return
                        //MergeEditor.history.beforeChange(model)//但不知道什么时候结束拖拽

                        model.scale.set(s, s, s)
                        model.isPointcloud && model.changePointSize(/* Potree.config.material.realPointSize * s */)

                        model.dispatchEvent("scale_changed")
                        

                    }
                },
                changeOpacity(opacity) { //见笔记：透明物体的材质设置
                    if (opacity == void 0) opacity = 100
                    opacity /= 100
                    MergeEditor.changeOpacity(model, opacity)
                },
                changeBottom(z) {
                    /* model && MergeEditor.setModelBtmHeight(model,z)
                    model.dispatchEvent('transformChanged') //改了position */
                },
                changePosition(pos) {//校准取消时执行
                    console.log('changePosition', pos.x, pos.y, pos.z)
                    model && model.position.copy(pos)
                    model.dispatchEvent({ type: 'position_changed' })
                },
                changeRotation(rot) {//校准取消时执行 
                    console.log('changeRotation', rot.x, rot.y, rot.z)
                    model && model.rotation.setFromVector3(rot)
                    model.dispatchEvent({ type: 'rotation_changed' })
                },

                enterRotateMode() {
                    if (model) {
                        if (MergeEditor.split) {//分屏校准
                            MergeEditor.setTransformState('rotate')
                            MergeEditor.transformControls2.attach(model)
                            MergeEditor.transformControls2.mode = 'rotate'
                        }


                        MergeEditor.transformControls.attach(model)
                        MergeEditor.transformControls.mode = 'rotate'

                    }
                },
                enterMoveMode() {
                    console.log('enterMoveMode')
                    if (model) {
                        if (MergeEditor.split) {//分屏校准
                            MergeEditor.setTransformState('translate')
                            MergeEditor.transformControls2.attach(model)
                            MergeEditor.transformControls2.mode = 'translate'
                        }
                        MergeEditor.transformControls.attach(model)
                        MergeEditor.transformControls.mode = 'translate'

                    }
                },
                leaveTransform() {
                    console.log('leaveTransform')
                    if (MergeEditor.split) {//分屏校准
                        MergeEditor.setTransformState(null)
                    } else {
                        MergeEditor.transformControls.detach()
                        MergeEditor.transformControls2.detach()
                    }
                    MergeEditor.history.clear()
                },

                enterAlignment() {//开始校准

                    result.leaveTransform()
                    MergeEditor.enterSplit()


                    //console.log('enterAlignment',model.position, model.rotation)
                    let bus = new mitt()

                    /* MergeEditor.transformControls.attach(model)
                    MergeEditor.transformControls.mode = 'translate' */

                    return {
                        bus
                    }
                },
                leaveAlignment() {
                    //console.log('leaveAlignment',model.position, model.rotation)
                    MergeEditor.leaveSplit()
                    MergeEditor.transformControls.detach()
                    MergeEditor.transformControls2.detach()

                },

                enterScaleSet() {//设置比例
                    let bus = new mitt()
                    let length, measureBuilded;
                    //viewer.outlinePass.selectedObjects = []
                    if (!Potree.Utils.isInsideFrustum(model.boundingBox.clone().applyMatrix4(model.matrixWorld), viewer.scene.getActiveCamera())) {
                        MergeEditor.focusOn(model, 600)
                    }

                    MergeEditor.getAllObjects().forEach(m => {//隐藏其他的模型
                        if (m != model) Potree.Utils.updateVisible(m, 'enterScaleSet', false)
                    })

                    let setScale = () => {
                        if (length == void 0 || !measureBuilded) return

                        let vec = new THREE.Vector3().subVectors(viewer.mainViewport.camera.position, scaleMeasure.points[1])


                        let s = length / (scaleMeasure.points[0].distanceTo(scaleMeasure.points[1]))
                        result.changeScale(model.scale.x * s * 100)
                        /* setTimeout(()=>{
                            viewer.focusOnObject(scaleMeasure , 'measure', 500)  
                        },1) */

                        let newCamPos = new THREE.Vector3().addVectors(scaleMeasure.points[1], vec.multiplyScalar(s))
                        viewer.scene.view.setView({
                            position: newCamPos, target: scaleMeasure.getCenter(), duration: 0, callback: () => {
                                //更改target到measure中心的好处就是可以让相机绕measure中心转，坏处是每次更改都会变一下画面

                            }
                        })

                    }

                    return {
                        bus,
                        setLength(v) {
                            if (!v) return
                            length = v
                            setScale()
                        },
                        startMeasure() {
                            if (scaleMeasure) {
                                viewer.dispatchEvent({ type: 'cancel_insertions', remove: true, measure: scaleMeasure })
                                viewer.scene.removeMeasurement(scaleMeasure)
                            }
                            measureBuilded = false
                            scaleMeasure = viewer.measuringTool.startInsertion(
                                { measureType: "Distance", unit: "metric" },
                                () => {
                                    //done:
                                    //bus.emit('end'  ) //完成
                                    measureBuilded = true
                                    setScale()
                                },
                                () => {
                                    //cancel
                                    //bus.emit('quit') //删除
                                }
                            )
                            scaleMeasure.addEventListener('marker_dropped', (e) => {//拖拽结束后发送changeCallBack
                                if (scaleMeasure.parent) {
                                    //未被删除
                                    measureBuilded && setScale()
                                }
                            })

                        }
                    }
                },

                leaveScaleSet() {
                    if (scaleMeasure) {
                        viewer.dispatchEvent({ type: 'cancel_insertions', remove: true, measure: scaleMeasure })
                        viewer.scene.removeMeasurement(scaleMeasure)
                        scaleMeasure = null
                    }


                    //viewer.outlinePass.selectedObjects = [model];
                    MergeEditor.getAllObjects().forEach(m => {//恢复其他的模型
                        if (m != model) Potree.Utils.updateVisible(m, 'enterScaleSet', true)
                    })
                },


                destroy() {
                    model && MergeEditor.removeModel(model)
                    result.changeSelect(false)
                    viewer.dispatchEvent('content_changed')
                }

            }

            return result
        },


        //测量线的点都附着于各个模型，当模型变化时，点跟着变化。



        // 新的测量创建方法，传入type 返回新测量对象
        startMeasure(type) {
            // 寻创建的测量对象有上面绘画测量对象的所有方法
            const bus = mitt()
            let info = getMeasureType(type)


            let measure = viewer.measuringTool.startInsertion(
                info,
                () => {
                    //done:
                    /* bus.emit('submit',  {
                        dataset_points: measure.dataset_points.map(p=>p.clone()) , 
                        points_datasets: measure.points_datasets
                    } ) //完成 */

                    bus.emit('submit')
                    bus.emit('update', [
                        measure.dataset_points.map(p => p.clone()),
                        measure.points_datasets
                    ])




                },
                () => {
                    //cancel
                    bus.emit('cancel'/* , ret */) //删除
                }
            )
            Potree.Log('startMeasure: ' + measure.id, '#00c7b2')

            /* let cancel = ()=>{ 
                Potree.Log('clear删除: ' + measure.id, '#00c7b2') 
                viewer.dispatchEvent({ type: 'cancel_insertions', remove: true, measure })
                viewer.scene.removeMeasurement(measure)
            } */

            let result = {
                bus,

                ...getMeasureFunction(measure, bus),
            }

            /* StartMeasure = Measure & {
              // 多了cancel 取消测量的事件，没有参数
              // 多了invalidPoint 当用户测量了无效点时的事件，抛出无效原因
              bus: Emitter<{ cancel: void; invalidPoint: string }>
            } */
            return result
        },





        // 绘画测量线（非新增使用）
        // type = 'free' (自由) || 'vertical' (垂直) || 'area' (面积)
        // positions 点数组 构成如下 [{ point: {x,y,z}, modelId: 1 }]
        drawMeasure(type, dataset_points, points_datasets) {
            // 返回测量对象有如下

            const bus = mitt()
            let info = getMeasureType(type /* , unit */)
            //info.points = positions 
            info.dataset_points = dataset_points
            info.points_datasets = points_datasets
            //info.sid = sid
            info.bus = bus
            let measure = viewer.measuringTool.createMeasureFromData(info)
            if (!measure) return { bus }
            Potree.Log('drawMeasure由数据新建: ' + measure.id, '#00c7b2')


            let result = {
                bus,
                setPositions(dataset_points, points_datasets) {//用于恢复measure的点，不会修改点的个数
                    measure.dataset_points = dataset_points.map(e => {
                        return e && new THREE.Vector3().copy(e)
                    })
                    measure.points_datasets = points_datasets
                    measure.points = measure.dataset_points.map((p, i) => {
                        return Potree.Utils.datasetPosTransform({ fromDataset: true, datasetId: measure.points_datasets[i], position: p })
                    })
                    measure.getPoint2dInfo(measure.points)
                    measure.update({ ifUpdateMarkers: true })
                    measure.setSelected(false)//隐藏edgelabel    
                },
                ...getMeasureFunction(measure, bus),
            }
            return result
        },


        createPath(props){//路线
 
            /* export type Path = {
              bus: Emitter<{
                // 标注点击事件
                click: void;
                // 鼠标移入标注事件
                enter: void;
                // 鼠标移出标注事件
                leave: void;
                // 顶部标注中心点像素位置更改事件， 传出像素位置
                lineTopPositionChange: SceneLocalPos
                // 路径点位置变更
                changePoints: PathProps['points']
                // 距离相机位置变更
                toCameraDistanceChange: number
              }>;
              // 是否可编辑
              changeCanEdit: (canMove: boolean) => void
              // 标注可见性
              visibility: (visibility: boolean) => void
              // 更改标题气泡属性
              changeLine: (props: Partial<PathProps['line']>) => void
              // 顶标注中心像素位置 
              lineTopPosition: ScreenLocalPos
              // 距离相机位置
              toCameraDistance: number
              // 线段销毁
              destory: () => void */
              
              
              
              
              
              
              
              
        },







        /* createTagging: (props: Tagging3DProps) => Tagging3D

                export type Tagging3DProps = {
                  // 标注类型 2d | 3d
                  type: TaggingPositionType,
                  // 模型id
                  modelId: string,
                  // 贴地射线获取的位置
                  position: SceneLocalPos
                  // 是否可以移动
                  canMove: boolean,
                  // 贴地图片url
                  image: string
                  // 离地高度
                  altitudeAboveGround: number,
                  
                  // 贴地图片的变换
                  mat: {
                    scale: SceneLocalPos,
                    rotation: Rotation,
                  }
                }
                export type Tagging3D = {
                  bus: Emitter<{
                    // 标注点击事件
                    click: void;
                    // 鼠标移入标注事件
                    enter: void;
                    // 鼠标移出标注事件
                    leave: void;
                    // 顶部标注中心点像素位置更改事件，  传出像素位置
                    topPositionChange: SceneLocalPos
                    // 位置变更
                    changePosition: {pos: SceneLocalPos, modelId: string}
                    // 距离相机位置变更
                    toCameraDistanceChange: number
                  }>;
                  changeCanMove: (canMove: boolean) => void
                  // 更改图标
                  changeImage: (url: string) => void
                  // 标注可见性
                  visibility: (visibility: boolean) => void
                  // 标注图片变换，传入变换
                  changeMat: (props: Tagging3DProps['mat']) => void
                  // 更改离地高度
                  changeAltitudeAboveGround: (val: number) => void
                  // 顶标注中心像素位置 （2d要加上图片大小）
                  topPosition: SceneLocalPos
                  // 距离相机位置
                  toCameraDistance: number
                  // 标注销毁
                  destory: () => void
                }

 */


        createTagging(props){
            let bus = mitt()
            let labelHide = false
        
            let root = viewer.scene.pointclouds.concat(viewer.objs.children).find(e=>e.dataset_id == props.modelId)
            if(!root){
                return console.error('热点没有找到该modelId，模型是否已经删除？')
            }
            
            let info = {  
                position: new THREE.Vector3().copy(props.position), //局部坐标
                normal: new THREE.Vector3().copy(props.normal), 
                root
            }    
            let tag = viewer.tagTool.createTagFromData(info)
            
            
            tag.addEventListener('mouseover',()=>{
                bus.emit('enter')
            }) 
            tag.addEventListener('mouseleave',()=>{
                bus.emit('leave')
            }) 
            tag.addEventListener('click',()=>{
                bus.emit('click')
            })
            tag.addEventListener('posChanged',(e)=>{
                bus.emit(changePosition, {
                    modelId: tag.root.dataset_id 
                })
            })
            
            
            
            tag.functions = {
                bus, 
                changeType(type){
                    let onMesh = type == '3d'
                    if(tag.onMesh != onMesh){
                        tag.changeOnMesh(onMesh) 
                        Potree.Utils.updateVisible(tag.line,'hideTitle', labelHide && onMesh ? false : true)
                    }
                },
                visibility(v){// 标注可见性
                    Potree.Utils.updateVisible(tag,'force', v)
                },
                visibilityTitle(v){
                    labelHide = !v
                    Potree.Utils.updateVisible(tag.label,'hideTitle', v)
                    tag.onMesh && Potree.Utils.updateVisible(tag.line,'hideTitle', v)
                },
                changeImage(url){
                    tag.changeMap(url)
                },
                changeTitle(title){
                    tag.changeTitle(title)
                },
                matChange(o){//大小旋转 贴墙时
                    console.log(o)
                    //tag.setFaceAngle()
                    //tag.spot.scale.set()
                },
                // 更改离地高度
                changeAltitudeAboveGround(height){//线长
                    tag.changeLineLen(height)
                },
                changeCanMove(canMove){
                    tag.dragEnable = canMove
                },
                /* // 顶标注中心像素位置 （2d要加上图片大小）
                topPosition: SceneLocalPos
                // 距离相机位置
                  */
                /* topPosition(){//label的位置  暂定 spot上方 
                    const disToSpot = 0.2;
                    tag.lineLength + disToSpot
                }, */  
                getImageCenter(){
                    tag.titleLabel.parent.updateMatrix()
                    //tag.titleLabel.parent.updateMatrixWorld()
                    let pos = tag.titleLabel.parent.getWorldPosition(new THREE.Vector3)
                    console.log(pos)
                     return pos
                },
                /* toCameraDistance(far){//多远会消失
                    tag.farSquared = far * far
                    this.updateVisiFar(dis)
                },
                updateVisiFar(){//我自己调用
                    if(tag.farSquared){
                        let v = viewer.mainViewport.camera.position.distanceToSquared(tag.position) < tag.farSquared
                        Potree.Utils.updateVisible(tag,'updateVisiFar',v)
                    }
                }, */
                getCameraDisSquared(){
                    return viewer.mainViewport.camera.position.distanceToSquared(tag.position) /* < tag.farSquared */
                }, 
                destory(){
                    tag.dispose()
                },
                
            }
            
            /* 
            
            tag.functions.changeType(props.type)
            tag.functions.changeImage(props.image)
            
             */
            
            
            return tag.functions
            
        },





        /*  
        addTag(info) {//加标签
            let bus = mitt()
            let tag


            let done = () => {
                bus.emit('added')
                bus.emit('update', { position: tag.position.clone(), normal: o.normal.clone(), modelId: tag.root.dataset_id })
                tag = tag_
                tag.spot.addEventListener('mouseover', () => {
                    bus.emit('hoverState', true)
                })
                tag.spot.addEventListener('mouseout', () => {
                    bus.emit('hoverState', false)
                })

            }

            if (!info.position) {
                viewer.tagTool.startInsertion().done(tag_ => {
                    done()
                })
            } else {
                info.root = MergeEditor.getAllObjects().find(e => e.dataset_id == info.modelId)
                if (!info.root) {
                    console.error('没有找到该modelId')
                }

                tag = viewer.tagTool.createTagFromData(info)
                done()
            }




            let result = {
                bus,
                getScreenPos() {
                    let pos3d = new THREE.Vector3().setFromMatrixPosition(tag.matrixWorld)
                    return sdk.getScreenByPosition(pos3d)
                },
                show() {
                    Potree.Utils.updateVisible(tag, 'byList', true)
                },
                hide() {
                    Potree.Utils.updateVisible(tag, 'byList', false)
                },
                destroy() {
                    if (tag) {
                        tag.dispose()
                    }


                    viewer.dispatchEvent({ type: 'cancel_insertions', remove: true })
                },
                changeTitle(title) {
                    tag.changeTitle(title)
                }
            }

            return result

        }, */





      /*   export type PathProps = {
              line: {
                width: number,
                color: string,
                altitudeAboveGround: number
                position: SceneLocalPos,
                modelId: string
              },
              points: {
                position: SceneLocalPos,
                modelId: string,
              }[]
            } */





        

        showGrid() {
            Potree.Utils.updateVisible(viewer.modules.MergeEditor.ground, 'hideGrid', true)
            viewer.dispatchEvent('content_changed')
        },

        hideGrid() {
            Potree.Utils.updateVisible(viewer.modules.MergeEditor.ground, 'hideGrid', false)
            viewer.dispatchEvent('content_changed')
        }
    }



 

    function spliceFromArr(model, props, loaded){
        //let autoLoads.find()
        props.loadFinish = true
        props.loading = false

        if (loaded) {
            props.loaded = true
            props.model = model
        } else {
            props.error = true
        }

        /* let haventLoad = autoLoads.filter(e=>!e.loading && !e.loadFinish);
        if( haventLoad[0]){
            startLoad(haventLoad[0])
              */
        if (!loadNext()) {
            if (autoLoads.filter(e => !e.loadFinish).length == 0 && autoLoads.filter(e => e.loaded).length > 0 && !props.isFirstLoad) {//设置相机位置：当自动开始加载第一个模型时(其余的也跟着自动加载),等这批加载完后;  
                let autoLoadsDone = autoLoads.filter(e => e.loaded).map(e => e.model)
                let loadTimeCost = Date.now() - loadStartTime
                console.log('所有模型加载完毕, 耗时', parseInt(loadTimeCost) )
                
                autoLoads.filter(e => e.loaded && e.show).forEach(e => e.model.visible = true)

                MergeEditor.focusOn(autoLoadsDone, 1000, true, true)
                autoLoads.length = 0
            }
        }
    }
     
     
    function loadNext(){
        let haventLoad = autoLoads.filter(e => !e.loading && !e.loadFinish);
        let loading = autoLoads.filter(e => e.loading);
        let needLoad = haventLoad.slice(0, maxLoadingCount - loading.length)
        needLoad.forEach(e => startLoad(e))
        return haventLoad.length > 0
    } 
      
    function startLoad(prop){ 
        /* if(prop.raw.visible !== 1){//用于临时隐藏 
            setTimeout(()=>{
                spliceFromArr(null, prop, false)
                prop.bus.emit('loadError' ) 
            },1) 
            return
        }  */  
        
        if(prop.loading || prop.loadFinish)return
        
        Potree.Log(`--开始加载--`, { font: { color: '#f68' } });
        console.log('id:', prop.id, ', title:', prop.title, ', filename:', Potree.Common.getNameFromURL(prop.url), ', type:', prop.type, prop)

        prop.unlit = prop.renderType != 'normal'
        prop.maximumScreenSpaceError = 70
        prop.prefix = prop.raw.prefix
        Potree.addModel(prop, prop.done, prop.progressFun, prop.onError)
        prop.loading = true

    }

    function buildMap(){
        if (Potree.settings.showCesium && !window.cesiumViewer) {

            viewer.backgroundOpacity = 0

            Cesium.Ion.defaultAccessToken = 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJqdGkiOiI2ZGM2YzY0ZC1kNWE0LTRiYTgtYTkwNS1kYmJiODRjMWUwMmQiLCJpZCI6MjMzMTQ1LCJpYXQiOjE3MjI5OTUwNTB9.niqpkl6xOkQ2KeJjelyDDDydmSGqKXKb5cX2NyxSNAw'
            window.cesiumViewer = new Cesium.Viewer('app', {
                useDefaultRenderLoop: true,
                requestRenderMode: true, //add 只有需要render时才会render，如tile加载完后、镜头移动后
                animation: false,
                baseLayerPicker: false,
                fullscreenButton: false,
                geocoder: false,
                homeButton: false, 
                infoBox: false,
                sceneModePicker: false,
                selectionIndicator: false,
                timeline: false,
                navigationHelpButton: false,
                //imageryProvider : Cesium.createOpenStreetMapImageryProvider({url : 'https://a.tile.openstreetmap.org/'}),
                imageryProvider: Cesium.UrlTemplateImageryProvider({ //直接用84坐标，不用转高德

                    //"https://wprd04.is.autonavi.com/appmaptile?lang=zh_cn&style=7&yrs=m&x=${x}&y=${y}&z=${z}"    //  


                    //url : 'https://webst0{0-7}.is.autonavi.com/appmaptile?lang=zh_cn&size=1&scale=1&style=7&x={x}&y={y}&z={z}&token=YOUR_API_KEY',
                    url: 'https://wprd04.is.autonavi.com/appmaptile?lang=zh_cn&size=1&scale=1&style=7&x={x}&y={y}&z={z}&token=YOUR_API_KEY',
                    minimumLevel: 0,
                    maximumLevel: 19
                }),
                //高德秘钥版 imageryProvider: new Cesium.AmapImageryProvider({key, mapStyle: 'normal'})
                //报错 401 (Unauthorized) 的方法 https://blog.csdn.net/LBY_XK/article/details/121992641

                terrainShadows: Cesium.ShadowMode.DISABLED, //terrain地形
            });
             
            //lonlat = [113.595236803415,22.3665168584444]//[113.600356,22.364093]
            Potree.setLonlat(lonlat[0], lonlat[1])
            
            Potree.cesScreenshot = (w,h)=>{
                console.log('cesScreenshot',w,h)
                cesiumViewer.scene.canvas.style.width = w+'px'
                cesiumViewer.scene.canvas.style.height = h+'px'
                cesiumViewer.scene.canvas.style.visibility = 'hidden'
                cesiumViewer.resize()
                cesAspect = w/h 
                let deferred = $.Deferred();
                
                updateMap(w/h)//hfov可能改变了需要update。 
                   
                setTimeout(()=>{ //延迟是似乎还要做别的处理，否则立即截图的话可能得到绿色底图（俯视状态容易触发）
                    let oldMode = window.cesiumViewer._cesiumWidget._scene.requestRenderMode
                    window.cesiumViewer._cesiumWidget._scene.requestRenderMode = 0  //强制render，否则会黑屏
                    cesiumViewer.render();
                    let dataUrl = window.cesiumViewer.scene.canvas.toDataURL('image/png')
                    window.cesiumViewer._cesiumWidget._scene.requestRenderMode = oldMode
                    
                    //Potree.Common.downloadFile(dataUrl,  'screenshot.png')   
                    cesAspect = null
                    cesiumViewer.scene.canvas.style.width = ''
                    cesiumViewer.scene.canvas.style.height = '' 
                    cesiumViewer.scene.canvas.style.visibility = ''
                    
                    deferred.resolve(dataUrl)
                },200) //时间短了容易黑屏
                    
                
                return deferred.promise()
                 
            }
        }
        updateMap()
        
        
    }

    
    
    function updateCamNear(type){// 有的漫游场景模型缩放的很小(0.1%)，需要缩小near才能看见，  但会造成z-fighting， 离远了看大模型会闪烁
        const min = 0.0001, max = 0.1
        let near , bigScale = 0.2 
    
        if(Potree.settings.displayMode == 'showPanos'/*  && type != 'cameraMove'  */){
            let currentModel = viewer.images360.currentPano.pointcloud
            near = Potree.math.linearClamp(currentModel.scale.x, [0, 1],   [min,  max]) 
            
        }else/*  if(type == 'cameraMove') */{
            //没有完美的解决方式，优先考虑选中的模型。否则优先考虑离得近的。 另外尽量用大的，因为缩很小的情况很少。
            //虽然案例说应该看model.bound.size，但如果非场景模型，缩很小的话也不需要凑近看。
            let allModels = viewer.objs.children.concat(viewer.scene.pointclouds)
            if(allModels.length == 0)return
            allModels.sort((a,b)=>{return a.scale.x - b.scale.x})
            
            let minS = allModels[0].scale.x,  maxS = allModels.pop().scale.x
            let considerModel  
            if(minS>bigScale) near = max 
            else{ 
                if(MergeEditor.selected){
                     considerModel = MergeEditor.selected
                     near = Potree.math.linearClamp(considerModel.scale.x, [0, bigScale],   [min,  max]) 
                }else{
                     //allModels = allModels.filter()  //写不下去了好难，就算了吧, 折中 
                     near = Potree.math.linearClamp(minS, [0, bigScale],   [max/4,  max]) 
                }   
            }  
        }
        
        if(near != viewer.mainViewport.camera.near){
            console.log('updateNear',near)
            viewer.mainViewport.camera.near = near
            viewer.mainViewport.camera.updateProjectionMatrix()
            viewer.dispatchEvent('content_changed')
        }
        
    } 

    function updateMap( ){
        
        
        
        if (Potree.settings.showCesium && Potree.settings.displayMode == 'showPointCloud') {
            let camera = viewer.mainViewport.camera
            let pPos = new THREE.Vector3(0, 0, 0).applyMatrix4(camera.matrixWorld);
            let pRight = new THREE.Vector3(600, 0, 0).applyMatrix4(camera.matrixWorld);
            let pUp = new THREE.Vector3(0, 600, 0).applyMatrix4(camera.matrixWorld);
            let pTarget = viewer.scene.view.getPivot();

            let toCes = (pos) => {
                let xy = [pos.x, pos.y];
                let height = pos.z;
                let deg = viewer.transform.lonlatToLocal.inverse(xy)  //  toMap.forward(xy);
                let cPos = Cesium.Cartesian3.fromDegrees(...deg, height);

                return cPos;
            };

            let cPos = toCes(pPos);
            let cUpTarget = toCes(pUp);
            let cTarget = toCes(pTarget);

            let cDir = Cesium.Cartesian3.subtract(cTarget, cPos, new Cesium.Cartesian3());
            let cUp = Cesium.Cartesian3.subtract(cUpTarget, cPos, new Cesium.Cartesian3());

            cDir = Cesium.Cartesian3.normalize(cDir, new Cesium.Cartesian3());
            cUp = Cesium.Cartesian3.normalize(cUp, new Cesium.Cartesian3());
 
            cesiumViewer.camera.setView({
                destination: cPos,
                orientation: {
                    direction: cDir,
                    up: cUp
                }
            });



            let aspect = cesAspect || viewer.scene.getActiveCamera().aspect;
            
            //console.log('updateMap', aspect)
            
            if (aspect < 1) {
                let fovy = Math.PI * (viewer.scene.getActiveCamera().fov / 180);
                cesiumViewer.camera.frustum.fov = fovy;
            } else {
                let fovy = Math.PI * (viewer.scene.getActiveCamera().fov / 180);
                let fovx = Math.atan(Math.tan(0.5 * fovy) * aspect) * 2
                cesiumViewer.camera.frustum.fov = fovx;
            }
 
            cesiumViewer.render(); //立即render，否则会和点云render不同步而错位
        }
    }

    return sdk
}




/* class path = */
 
 
/* 

    暂定不同场景间的漫游点不能互通。虽然它们可能是摆放正确的，如果是组成一整个场景的话还是要打通……
    不互通的方法是设置pano.enable
    
    现在需要互通了。但是还需要设置neibgbours， 有点麻烦，暂时没写。

 */

export default enter