potree-sdk/src/custom/modules/mergeModel/MergeEditor.js

 
import * as THREE from "../../../../libs/three.js/build/three.module.js";
import cameraLight from '../../utils/cameraLight.js' 

import math from "../../utils/math.js"
import Common from '../../utils/Common.js' 
import {LineDraw, MeshDraw} from "../../utils/DrawUtil.js"; 
import {transitions, easing, lerp} from '../../utils/transitions.js'
import SplitScreen from "../../utils/SplitScreen.js";
import InfiniteGridHelper from '../../objects/InfiniteGridHelper.js'
import Compass from "../../objects/tool/Compass.js";
import {TransformControls} from "../../objects/tool/TransformControls.js";
import History from "../../utils/History.js"
import {Box3Helper} from "../../../utils/Box3Helper.js";
 
import {TextSprite} from '../../objects/TextSprite.js' 
  
 
const texLoader = new THREE.TextureLoader() 
      texLoader.crossOrigin = "anonymous" 

   
  
const edgeStrengths = {
    pointcloud: 4,
    glb: 100
}
const viewportProps = [{ 
    left:0,
    bottom:0,
    width: 0.5,height:1,
    name : 'top',    
    axis:["x","y"],
    direction : new THREE.Vector3(0,0,-1), //镜头朝向 
    active: true,
    //相机位置在z轴正向
    limitBound: new THREE.Box3(new THREE.Vector3(-Infinity,-Infinity, 1),new THREE.Vector3(Infinity,Infinity,5000)), //在地面以上
    margin:{x:50, y:150} ,
},
{
    left:0.5,
    bottom:0,
    width: 0.5,height:1,
    name : 'right', 
    axis:["y","z"],
    direction : new THREE.Vector3(1,0,0), 
    active: true,
    //相机位置在x轴负向  右下角屏
    viewContainsPoints:[new THREE.Vector3(0,0,0)],
    margin:{x:300, y:250} ,
} ]
let cylinderSkyGeo, oldSkyGeo
 
 
let MergeEditor = {
    bus:new THREE.EventDispatcher(), 
     
    
    SplitScreen : new SplitScreen(),
    
    init(){  
    
        this.boxHelper = new Box3Helper(new THREE.Box3(new THREE.Vector3(-0.5,-0.5,-0.5), new THREE.Vector3(0.5,0.5,0.5)));
        viewer.scene.scene.add(this.boxHelper)
        Potree.Utils.updateVisible(this.boxHelper,'unselect',false)
        
        this.lastMemoryState = {}
        
    
        this.history = new History({ 
            applyData: (data)=>{ 
                if(data.object.parent /* && data.object == this.selected */){
                    data = Potree.Common.CloneObject(data) //避免使用后更改数据又被使用 
                    data.matrix.decompose( data.object.position, data.object.quaternion, data.object.scale );
                    data.object.boundCenter.copy(data.boundCenter)
                    data.object.dispatchEvent('changeByHistory') 
                    data.object.dispatchEvent('transformChanged')                    
                    viewer.dispatchEvent('content_changed')
                    
                    return true
                }  
            },
            getData:(object)=>{   
                return {
                    object,
                    matrix:  object.matrixWorld.clone(),
                    boundCenter: object.boundCenter.clone()
                }
            } 
        })  
        
    
        
        { 
        
            Potree.settings.notAdditiveBlending = true
        
            let ground = this.ground = new InfiniteGridHelper(1, 10000, new THREE.Color('#eee'), 10000, 0.2, 0.3)
            viewer.scene.scene.add(ground) 
            //再加两条线否则在正侧边看不到
            let line1 = LineDraw.createLine([new THREE.Vector3(-10000, 0, 0),new THREE.Vector3(10000, 0, 0) ], {color:'#aaa', })
            let line2 = LineDraw.createLine([new THREE.Vector3(0, -10000, 0),new THREE.Vector3(0, 10000, 0) ], {mat:line1.material})
            ground.renderOrder = Potree.config.renderOrders.model + 1//line1.renderOrder + 1  //要比模型低，否则模型透明时效果不对
            ground.add(line1) 
            ground.add(line2)
            ground.material.opacity = 0.9 //为了滞后渲染，否则被rt遮住
            ground.material.polygonOffset = true //多边形偏移(视觉上没有移动模型位置),防止闪烁
            ground.material.polygonOffsetFactor = 100 //多边形偏移因子
			ground.material.polygonOffsetUnits = 10 //多边形偏移单位  
            ground.material.depthWrite = false            
            //ground.material.depthTest = false
            line1.material.polygonOffset = true
            line1.material.polygonOffsetFactor = 130  
			line1.material.polygonOffsetUnits = 10  
            line1.material.depthWrite = false   
            //见笔记：透明物体的材质设置
        }
        
        let oriEdgeStrength = viewer.outlinePass.edgeStrength 
        {
            
            this.transformControls = new TransformControls(viewer.mainViewport.camera, viewer.renderArea,{
                //dontHideWhenFaceCamera: true,
            });
            //this.transformControls.space = 'local'//为了在当前方向上平移
            this.transformControls.setSize(1.5)
            viewer.scene.scene.add(this.transformControls)
            this.transformControls._gizmo.hideAxis = {rotate:['e'] ,scale:['x','y','z' ] }
            this.transformControls._gizmo.showAxis = {scale:['XYZY']} //仅显示 等于而非包含
            this.transformControls.setRotateMethod(2)
            
            
            //右屏
            this.transformControls2 = new TransformControls(viewer.mainViewport.camera, viewer.renderArea,{ 
                //dontHideWhenFaceCamera: true,
            }); 
            this.transformControls2.setSize(1.5)
            viewer.scene.scene.add(this.transformControls2) 
            Potree.Utils.setObjectLayers(this.transformControls2, 'layer2' )  
             
             
            let mouseDown = (e)=>{
                 
                viewer.outlinePass.edgeStrength = 0//暂时消失线
                 
            }
            let mouseUp = (e)=>{
                 
                //this.updateEdgeStrength()
                viewer.outlinePass.edgeStrength = oriEdgeStrength
            }
            this.transformControls.addEventListener('mouseDown',mouseDown)
            this.transformControls2.addEventListener('mouseDown',mouseDown)
            this.transformControls.addEventListener('mouseUp',mouseUp)
            this.transformControls2.addEventListener('mouseUp',mouseUp)
            
            
            
            
            
            this.transformControls.addEventListener('mouseDown', ()=>{ //dragstart
                this.history.beforeChange(this.selected)
            })  
            this.transformControls.addEventListener('mouseUp',()=>{
                this.history.afterChange(this.selected)
            })

        }
        
        
        {
            
            this.secondCompass = new Compass(null)
            
        }
        
        viewer.setControls(viewer.orbitControls)
        //viewer.mainViewport.view.fixZWhenPan = true
        viewer.orbitControls.constantlyForward = true
        
        
        viewer.addEventListener('global_single_click',(e)=>{
            if(
                e.button != THREE.MOUSE.LEFT
                || this.noNeedSelection  //如模型查看页
                || viewer.scene.cameraAnimations.some(c=>c.onUpdate) //正在播放
                || e.drag && e.drag.notPressMouse   //在加测量线
                || viewer.mainViewport.view.isFlying() //有其他校准
                || this.split           //分屏中
                || e.clickElement //触发别的点击事件，如测量时click marker  /* && e.clickElement != e.intersect.object */
            ){
                return
            }
            
            if(e.intersect){
                let object = e.intersect.object || e.intersect.pointcloud
                let objects = this.getAllObjects()
                let posInModel = Potree.Utils.datasetPosTransform({ toDataset: true, position: e.intersect.location.clone(),  object })
                if(objects.includes(object) && this.selected != object){ 
                    this.selectModel(object, posInModel) 
                }else{
                    //if(!viewer.inputHandler.selection[0]){//正在平移和旋转，不允许取消
                      if(this.selected == object && this.transformControls.mode == 'translate'){
                          this.selectModel(object, posInModel)  //update click pos
                      }else{
                          this.selectModel(null)
                      }
                    //}
                }                    
            }else{
                //if(!viewer.inputHandler.selection[0]){
                    this.selectModel(null)
                //}                
            }
        })  
        
        viewer.inputHandler.addEventListener('keydown', (e)=>{
            if((e.event.key).toLowerCase() == "h" ){ 
                this.fadeOutlineAuto = !this.fadeOutlineAuto
                this.showModelOutline(this.selected,!!this.selected)
            } 
        })
        //viewer.fxaaPass.enabled = false//viewer.ssaaRenderPass.enabled = false 
        viewer.outlinePass.enabled = true
        //Potree.settings.intersectWhenHover = false
        //Potree.Utils.updateVisible(viewer.reticule, 'force', false)
        viewer.composer.scaleRatio = 1
        viewer.composer.readTarget = false
        
        viewer.addEventListener('updateModelBound', (e)=>{
            if(this.split){ 
                this.SplitScreen.updateCameraOutOfModel(/* this.selected && [this.selected] */) 
            } 
        })
        
        
        {//校准页面拖拽
            //左右屏都可以拖拽模型，旋转只能左屏
            let dragInfo  
            let drag = (e)=>{ 
                if(this.split &&  this.selected && this.transformState && (e.dragViewport.name == 'top' || this.transformState == 'translate')   ){ 
                    if(e.type == 'global_mousedown' ){ //开始
                        //if((e.intersect.object || e.intersect.pointcloud) == this.selected){
                        if(e.intersect.pointclouds.includes(this.selected) || e.intersect.allElements.some(e=>e.object == this.selected)){
                            
                            dragInfo = {}   
                            //if(this.selected.isPointcloud){ 
                                viewer.outlinePass.edgeStrength = 0//暂时消失线
                            //} 
                        }  
                    }
                         
                    if(e.type == 'global_drag' && dragInfo  ){ 
                        if(this.transformState == 'translate'){ 
                        
                            let moveVec = Potree.Utils.getOrthoCameraMoveVec(e.drag.pointerDelta, e.dragViewport.camera )//最近一次移动向量
                            this.selected.position.add(moveVec)
                            
                            this.selected.dispatchEvent("position_changed")
                        }else if(this.transformState == 'rotate'){
                            
                            let vec = new THREE.Vector3().subVectors(e.intersect.orthoIntersect || e.intersect.location, this.selected.boundCenter).setZ(0)
                            if(dragInfo.lastVec == void 0){//global_mousedown
                                dragInfo.lastVec = vec 
                                return
                            }
                            let angle = math.getAngle(dragInfo.lastVec, vec, 'z')   
                            dragInfo.lastVec = vec
                            
                            //this.selected.rotation.z += angle //局部
                            
                            
                            /* object.quaternion.copy( .setFromAxisAngle( new THREE.Vector3(0,0,1), angle ) );
                            object.quaternion.multiply( quaternionStart ).normalize(); */
                            let diffQua = new THREE.Quaternion().setFromAxisAngle( new THREE.Vector3(0,0,1), angle )
                            this.selected.quaternion.premultiply(diffQua) //世界
                            
                            
                            this.selected.dispatchEvent("rotation_changed")
                        }
                        
                        return {stopContinue:true}
                    } 
                }
                
            }
            
            viewer.addEventListener('global_mousedown',  drag) 
            viewer.addEventListener('global_drag', drag, {importance:10})
            viewer.addEventListener('global_mousemove', (e)=>{
                if(this.split && this.transformState && !e.drag && (e.hoverViewport.name == 'top' ||  this.transformState == 'translate')){
                    
                    /* if(this.lastHoverViewport != e.hoverViewport){
                        this.lastHoverViewport = e.hoverViewport
                        this.transformControls.view = e.hoverViewport.view
                        this.transformControls.camera = e.hoverViewport.camera
                        this.transformControls.hideAxis( this.transformState, e.hoverViewport.name == 'top' ? [z] : [x,y]);
                    } */
                    
                    
                    
                    
                    let mouseover =  e.intersect.pointclouds.includes(this.selected) || e.intersect.allElements.some(e=>e.object == this.selected)
                    //let mouseover = (e.intersect.object || e.intersect.pointcloud) == this.selected
                    if(mouseover){
                        if(this.transformState == 'translate'){
                            viewer.dispatchEvent({
                                type : "CursorChange", action : "add",  name:"movePointcloud" 
                            }) 
                        }else{
                            viewer.dispatchEvent({
                                type : "CursorChange", action : "add",  name:"rotatePointcloud" 
                            }) 
                        }
                    }else{
                        this.clearTranCursor()
                    }
                    
                } 
            })
            
            viewer.addEventListener('global_drop', (e)=>{
                dragInfo = null
                this.clearTranCursor()
                  
                //this.updateEdgeStrength()
                viewer.outlinePass.edgeStrength = oriEdgeStrength  
                
            })
        
        }
        
        
        /* viewer.addEventListener('background_changed',()=>{
          
        }) */
        
                   
        viewer.addEventListener('camera_changed',()=>{//其实静止时内存也会变，因为在加载
            this.lastMemoryState.history = [] //clear
            Common.intervalTool.isWaiting('updateMemoryUsage', ()=>{   
                return this.updateMemoryUsage()
            },  1000) 
        }) 
         
        
        viewer.addEventListener('setDisplay',this.updateMemoryUsage.bind(this))
    },
    
    
    clearTranCursor(){
        viewer.dispatchEvent({
            type : "CursorChange", action : "remove",  name:"movePointcloud" 
        })
        viewer.dispatchEvent({
            type : "CursorChange", action : "remove",  name:"rotatePointcloud" 
        })
    },
    
    enterSplit(){ 
        this.split = true
        if(this.selected) this.SplitScreen.focusCenter = this.selected.boundCenter //旋转中心。注意 boundCenter不能直接赋值，否则改变后focusCenter也要改
        else this.SplitScreen.focusCenter = null
        
        this.SplitScreen.splitStart(viewportProps)
        
        this.beforeSplit = {
            pointDensity: Potree.settings.pointDensity,
        }
        Potree.settings.pointDensity = 'fourViewports' //强制降低点云质量
         
        
        viewer.setControls(viewer.fpControls)  
         
        let rightViewport = viewer.viewports.find(e=>e.name == 'right')
        let topViewport = viewer.viewports.find(e=>e.name == 'top')
        topViewport.alignment = true
        rightViewport.rotateSide = true  
        rightViewport.skyboxFixPos = true
        rightViewport.skyboxMinZoom = 10
        rightViewport.skyboxRenderFun = ()=>{// 使cube的一面永远正向镜头。 因侧视图的camera是ortho类型，需要平视mesh才不会拉伸
            viewer.skybox.scene.children[0].rotation.copy(rightViewport.camera.rotation)
        }
        topViewport.skyboxRenderFun = ()=>{
            viewer.skybox.scene.children[0].rotation.set(0,0,0)
        }
         
        
        
        viewer.viewports[1].layersAdd('layer2') 
        viewer.viewports[0].layersAdd('layer1') 
        Potree.Utils.setObjectLayers(this.transformControls, 'layer1' ) 
        this.transformControls.view = viewer.viewports[0].view
        this.transformControls.camera = viewer.viewports[0].camera
        this.transformControls._gizmo.hideAxis = {translate:['z'], rotate:['x','y','z'] }
        this.transformControls2.view = viewer.viewports[1].view
        this.transformControls2.camera = viewer.viewports[1].camera
        this.transformControls2._gizmo.hideAxis = {translate:['x','y'], rotate:['x','y','z'] }
        

        this.secondCompass.changeViewport(viewer.viewports[0])
        this.secondCompass.setDomPos()
        this.secondCompass.setDisplay(true)   
        viewer.compass.changeViewport(viewer.viewports[1])
        viewer.compass.setDomPos()
        
        
        //this.changeSkyboxGeo(true)
    },
    
    
    leaveSplit(){
        this.split = false
        this.SplitScreen.unSplit()    
        viewer.setControls(viewer.orbitControls)
        
        Potree.settings.pointDensity = this.beforeSplit.pointDensity
        /* if(this.selected && this.selected.isPointcloud){ 
            this.showModelOutline(this.selected, true) 
            this.selected.material.activeAttributeName = "rgba"  
        } */
        this.transformControls.camera = viewer.viewports[0].camera
        this.transformControls.view = viewer.viewports[0].view 
        this.transformControls._gizmo.hideAxis = {rotate:['e']}
        Potree.Utils.setObjectLayers(this.transformControls, 'sceneObjects' )  //恢复
        
        
        viewer.compass.changeViewport(viewer.viewports[0]) //恢复 
        viewer.compass.setDomPos()
        this.secondCompass.setDisplay(false)
        
        
    },
    
    rotateSideCamera(angle){
        this.SplitScreen.rotateSideCamera(viewer.viewports.find(e=>e.name == 'right'), angle)
    },
    
    setTransformState(state){//校准时
        this.transformState = state  
        this.clearTranCursor()       
    },
     
    //---------------------------
    
    getAllObjects(){
        return viewer.objs.children.concat(viewer.scene.pointclouds)
    },
    
    getModel(id){
        let models = this.getAllObjects()
        return models.find(e=>e.dataset_id == id)
    },
    
    changeModelPointCount(object, type){
        if(object.fileType == '3dTiles' || object.isPointcloud) return
            
        let  posCount , texArea   
        if(type == 'add'){
            let o = viewer.getObjectPointCount(object) 
            posCount = o.posCount,  texArea = o.texArea 
            object.posCount = posCount,   object.texArea = texArea
        }else{
            posCount = -object.posCount,   texArea = -object.texArea 
        }
 
        viewer.memoryModelCountInfo.otherPosCount += posCount 
        viewer.memoryModelCountInfo.otherTexArea += texArea  
    },


    modelAdded(model){
        /* model.addEventListener('isVisible',(e)=>{ 
            if(e.reason == "overlinePass")return
            //console.log(e)
            viewer.addEventListener('update',()=>{ //下一次更新结束后
                this.updateMemoryUsage()
            },{once:true})  
        }) */
        let weightUpdate = ()=>{
            this.changeModelPointCount(model,'add') 
            this.updateMemoryUsage()
        }
        
        if(model.fileType == 'obj'){//要等待贴图都加载完
            if(viewer.fileManager.loading){
                viewer.addEventListener('managerOnLoad',(e)=>{
                    weightUpdate()
                },{once:true}) //如果onError了咋办，暂时无法定位manager加载的哪个模型的
            } 
        }else{
            weightUpdate()
        }
        
    },
    removeModel(model){
        if(this.selected == model) this.selectModel(null)
        let dispose = (e)=>{
            e.geometry && e.geometry.dispose() 
            e.material && e.material.dispose()
        }
        if(model.isPointcloud){
            dispose(model)
            viewer.scene.removePointCloud(model)
        }else{
            model.traverse(e=>{
                dispose(e) 
            })
            viewer.objs.remove(model)
            
        }   
        
        model.panos?.slice().forEach(e=>{
            e.dispose()
        }) 
        viewer.images360.tileDownloader.setPanoData(viewer.images360.panos, [] );
        
        if(model.fileType == '3dTiles'){
            model.traverse(child=>{
                if(child.runtime){
                    child.runtime.getTileset().destroy()
                    return {stopContinue:true}
                }
            })
            
        }
       
        this.changeModelPointCount(model,'sub') 
        this.updateMemoryUsage()
    },
    
    selectModel(model, state=true, fitBound, by2d){
        if(!model) {
            model = this.selected
            state = false
        }
        if(!by2d && model){
            model.dispatchEvent({type:'changeSelect', selected : state,  clickPos:state})
        }
        if(state){
            if(this.selected){
                if(this.selected == model) return
                else{
                    let transToolAttached = !!this.transformControls.object
                    this.selectModel(this.selected, false, fitBound, by2d)
                    transToolAttached && this.transformControls.attach(model)
                }
            }
            this.selected = model
             
            MergeEditor.focusOn(model, 500, !!fitBound)     //通过在场景里点击模型的话，不focus
              
           
            this.showModelOutline(model)
             
            //this.updateEdgeStrength()
            
            //console.log('selectModel', model)
            
        }else{
            if(this.selected != model)return //model本来就没选中，不需要处理（防止2d先选中新的再取消旧的）
            this.showModelOutline(model, false)
             
            this.selected = null
            this.transformControls.detach()        //viewer.transformObject(null);
            //console.log('selectModel', null)
        } 
        
        
        
        
        
         

        
        
    },
    
    updateBoxHelper(model){
        let size = new THREE.Vector3
        model.boundingBox.getSize(size)
        size.multiply(model.scale)
        this.boxHelper.scale.copy(size) 
        
        let center = new THREE.Vector3 
        model.boundingBox.getCenter(center) 
        center.applyMatrix4(model.matrixWorld)
        //center.add(model.position)     
        this.boxHelper.position.copy(center)
         
        this.boxHelper.quaternion.copy(model.quaternion)  
        viewer.dispatchEvent('content_changed')
    },
    
     
    
    showModelOutline(model, state){ 
        if(Potree.settings.selectShowBox || (model ? model.fileType == '3dgs' : this.boxHelper.visible)  ){//高斯很卡
            if(state !== false ){
                this.updateBoxHelper(model) 
                Potree.Utils.updateVisible(this.boxHelper,'unselect',true)
            }else{ 
                Potree.Utils.updateVisible(this.boxHelper,'unselect',false)
            }
            return
        }
        
        
        
        if(this.fadeOutlineAuto){ 
            if(state === false){
                viewer.outlinePass.selectedObjects = []
                clearTimeout(this.timer)
                return
            }
            
            viewer.outlinePass.selectedObjects = [model]
            if(this.timer){
                clearTimeout(this.timer)
            }
            
            this.timer = setTimeout(()=>{
                viewer.outlinePass.selectedObjects = []
                viewer.dispatchEvent('content_changed') 
            }, 1000)
        }else{
            if(state === false){
                viewer.outlinePass.selectedObjects = []
            }else{
                viewer.outlinePass.selectedObjects = [model]
            } 
        }
        viewer.dispatchEvent('content_changed') 
    },
    
    /*updateEdgeStrength(){
        if(!this.selected)return 
         if(this.selected.isPointcloud){
            viewer.outlinePass.edgeStrength = edgeStrengths.pointcloud// / this.selected.material.opacity  
        }else{
            viewer.outlinePass.edgeStrength = edgeStrengths.glb
        }  
    },*/ 
    focusOn(objects, duration = 400, fitBound=true, dontLookUp, dir){  
        if(!(objects instanceof Array)){
            objects = [objects]
        }
        let boundingBox = new THREE.Box3
        objects.forEach(object=>{
            boundingBox.union(object.boundingBox.clone().applyMatrix4(object.matrixWorld))
        })
        
        let len = boundingBox.getSize(new THREE.Vector3).length()
        Potree.settings.cameraFar = Math.max( Potree.settings.cameraFar, len*3 )
        
        if(fitBound){
            viewer.focusOnObject({boundingBox}, 'boundingBox', duration, {dontLookUp, dontChangeCamDir:dir?false:true, dir}) 
        }else{ 
        
            /* 
            let position = viewer.inputHandler.intersect ? viewer.inputHandler.intersect.location : boundingBox.getCenter(new THREE.Vector3)
            position && viewer.focusOnObject({position},  'point', duration, {dontChangePos: true})
             */
            let position = viewer.inputHandler.intersect ? viewer.inputHandler.intersect.location : boundingBox.getCenter(new THREE.Vector3)
            if(!position)return
            
            
            /* let targetOld = viewer.mainViewport.view.getPivot()
            
            let projected1 = targetOld.clone().project(viewer.mainViewport.camera);
            let projected2 = position.clone().project(viewer.mainViewport.camera); //使用其z
			let targetNew = projected1.clone().setZ(projected2.z).unproject(viewer.mainViewport.camera); 
            viewer.mainViewport.view.lookAt(targetNew) */
            
            
            viewer.mainViewport.view.radius = viewer.mainViewport.camera.position.distanceTo(position)
            //为了不改画面，不调节方向了，只能调调radius，一定程度将target靠近model
        }  
    },
    
    
    moveBoundCenterTo(model,pos){ //使boundCenter在所要的位置 
        let diff = new THREE.Vector3().subVectors(pos, model.boundCenter) 
        model.position.add(diff); 
    },
    
    getBoundCenter(model){
        if(!model.boundCenter) {
            model.boundCenter = new THREE.Vector3
            model.boundSize = new THREE.Vector3
        }
        let bound = model.boundingBox.clone().applyMatrix4(model.matrixWorld) 
        bound.getCenter(model.boundCenter)
        bound.getSize(model.boundSize)
        //model.boundingBox.getCenter(model.boundCenter).applyMatrix4(model.matrixWorld) 
    },
    
    setModelBtmHeight(model, z ){  
        //无论模型怎么缩放、旋转，都使最低点为z
        if(z == void 0) z = model.btmHeight; //维持离地高度
        else model.btmHeight = z;
        
        if(model.btmHeight == void 0)return 
        model.updateMatrixWorld()
        this.getBoundCenter(model) 
        /* let boundingBox2 = model.boundingBox.clone().applyMatrix4(model.matrixWorld)
        let size = boundingBox2.getSize(new THREE.Vector3);
        let center = boundingBox2.getCenter(new THREE.Vector3); */ 
        let hopeZ = z + model.boundSize.z / 2  
        //model.position.z = z + size.z / 2 - center.z 
        model.position.z += (hopeZ - model.boundCenter.z)
    },
    
    computeBtmHeight(model){ //位移之后重新计算btmHeight
        model.updateMatrixWorld()
        /* let boundingBox2 = model.boundingBox.clone().applyMatrix4(model.matrixWorld)
        let size = boundingBox2.getSize(new THREE.Vector3);
        let center = boundingBox2.getCenter(new THREE.Vector3); */
        this.getBoundCenter(model)
        model.btmHeight = model.boundCenter.z - model.boundSize.z / 2 
    },
    
    
    maintainBoundXY(model){ //在旋转和缩放后，立即执行这个函数，使boundCenter保持原位
         
        model.updateMatrixWorld()
        let center1 = model.boundCenter.clone();//还未更新的 
        this.getBoundCenter(model)//更新
        let center2 = model.boundCenter.clone();
        let diff = new THREE.Vector2().subVectors(center1,center2); 
        model.position.x += diff.x;
        model.position.y += diff.y;
        model.boundCenter.copy(center1)
    }, 
     
    
    
    maintainBoundCenter(model){
        model.updateMatrixWorld()
        let center1 = model.boundCenter.clone();//还未更新的 
        this.getBoundCenter(model)//更新
        let center2 = model.boundCenter.clone();
        let diff = new THREE.Vector3().subVectors(center1,center2); 
        model.position.add(diff)
        model.boundCenter.copy(center1)
    },
    
    modelTransformCallback(model,force){
        
        model.updateMatrixWorld() 
        if(!force && model.matrixWorld.equals(model.lastMatrixWorld))return
        viewer.scene.measurements.forEach(measure=>{
            let changed
            measure.points_datasets.forEach((dataset_id,i)=>{
                if(dataset_id == model.dataset_id){
                    changed = true
                    measure.points[i] = Potree.Utils.datasetPosTransform({fromDataset:true,datasetId:dataset_id, position:measure.dataset_points[i].clone()})
                    measure.updateMarker(measure.markers[i], measure.points[i])
                   
                }
            })
            if(changed){//仿transformByPointcloud
                measure.getPoint2dInfo(measure.points)
                measure.update() 
                measure.setSelected(false)//隐藏edgelabel  
            }
        }) 
        viewer.tags.children.forEach(tag=>{
            if(tag.root == model){
                tag.titleLabel.updatePose()
            }
        })
        
        
        
        //反向求transformMatrix  参考Alignment.js   移动漫游点 
        if(model.isPointcloud && model.transformMatrix){ 
            model.transformMatrix.multiplyMatrices(model.matrix, model.pos1MatrixInvert)   
            model.rotateMatrix = new THREE.Matrix4().makeRotationFromEuler(model.rotation);  
            model.panos.forEach(e=>e.transformByPointcloud())
        }else if(model.panos){ 
            model.rotateMatrix = new THREE.Matrix4().makeRotationFromEuler(model.rotation).multiply(model.rot1MatrixInvert);   
            model.transformMatrix.multiplyMatrices(model.matrix, model.posRot1MatrixInvert)   
            model.panos.forEach(e=>e.transformByPointcloud())
            model.bound = model.boundingBox.clone().applyMatrix4(model.matrixWorld)
        } 
        if(model.panos){
            model.transformInvMatrix.copy(model.transformMatrix).invert()  
            model.rotateInvMatrix.copy(model.rotateMatrix).invert()
            
            model.panos.forEach(e=>{
                e.marker.scale.copy(model.scale)
            })
        }
        
        
        
        model.lastMatrixWorld = model.matrixWorld.clone()
        viewer.dispatchEvent('content_changed')
        viewer.mapViewer && Potree.settings.showObjectsOnMap && viewer.mapViewer.dispatchEvent('content_changed')
        
        
        //--------
        this.selected == model && this.updateBoxHelper(model)
        
    },
    
    
    changeOpacity(model, opacity){
         
        let isRoot = model.dataset_id != void 0  //是否是最外层 
             
    
        if(model.isPointcloud){ 
            model.changePointOpacity(opacity) 
            //MergeEditor.updateEdgeStrength()
        }else{
            //model.traverse(e=>e.material && setOp(e, opacity))
            model.traverse(mesh=>{ 
                if(mesh.material){
                    let mats = (mesh.material instanceof Array) ? mesh.material : [mesh.material]
                    mats.forEach(mat=>{
                        if(mat.originOpacity == void 0 ){
                            mat.originOpacity = mesh.material.opacity
                        }
                        mat.opacity = mat.originOpacity * opacity
                        
                        if(mat.opacity<1){
                            mat.transparent = true  
                            /* if(model.isPointcloud){
                                mesh.changePointOpacity(realOpacity)  
                            }else{
                                mesh.material.opacity = realOpacity
                            } */
                            
                            mesh.renderOrder = Potree.config.renderOrders.model+1 //如果是一个mesh多个material咋整？ obj的。 暂时默认全部opacity一样吧
                            //mesh.material.depthWrite = false
                        }else{
                            mat.transparent = false
                            mesh.renderOrder = Potree.config.renderOrders.model
                            //mesh.material.depthWrite = true
                        }
                        mat.depthWrite =  mat.opacity > 0.5 //防止的mesh之间完全遮挡，去掉write。write为true会完全遮挡后排的物体。没有write之后需要对渲染排序（three会排序，但有的角度会错）
                    }) 
                }
            })
        }
            
              
        isRoot && (model.opacity = opacity)//记录在最外层
        viewer.dispatchEvent('content_changed')
        
    },
    
    addTitleForModel(model){ 
        var titleLabel = new TextSprite({  
            startClipDis  : 0.5,
            clipDistance : 1,//消失距离      
            startOcclusDis: 0.5,
            occlusionDistance: 0.9,//变为backColor距离 
            maxOcclusionFactor:0.7,
            maxClipFactor:1,
            text:model.name, sizeInfo:{width2d:150},
            rectBorderThick:1,            
            borderColor:{r:200,g:200,b:200,a:0.5}, 
            textColor:{r:255 ,g:255,b:255,a:1.0}, 
            textshadowColor:'black',
            backgroundColor:{r: 100,g:100,b:100,a:0.3},
            borderRadius: 6,   
            fontsize: 20,  fontWeight:'',//thick
            renderOrder : Potree.config.renderOrders.tag.label, 
            pickOrder: Potree.config.renderOrders.tag.label,
            useDepth : true ,
            maxLineWidth: 300,
            transform2Dpercent:{x:0,y:1.3}, //向上移动 
            textAlign: Potree.settings.isOfficial && 'left'
        }) 
        model.titleLabel = titleLabel
        viewer.scene.scene.add(titleLabel)
        let updatePos = ()=>{
            titleLabel.position.copy(model.boundCenter)  
            titleLabel.position.z += model.boundSize.z / 2          //暂时加载模型顶部，但也可能如果旋转了要在头顶
            titleLabel.updatePose()
        }
        let setVisible = ()=>{
            Potree.Utils.updateVisible(titleLabel,'followModel', model.visible)
            viewer.dispatchEvent('content_changed')
        }
        model.addEventListener('transformChanged',updatePos)
        model.addEventListener('isVisible',setVisible)
        
        titleLabel.addEventListener('isVisible',()=>{
            titleLabel.visible && updatePos()
        })
        setVisible()
        updatePos()
        
    },
    
     
    
     
    
    updateMemoryUsage1(){
        
        //obj暂时不管其贴图大小, 因为顶点造成的不仅是内存还有卡顿所以先只看顶点
        const maxMemory = Potree.config.tiles3DMaxMemory + 100 //M  实际估计是这个的10倍
        const eachObjPosWeight = 100/1000/1000  //M  每个顶点pos是3*4个字节？法线3*4和uv2*4  其实还有贴图 
        const eachCloudPointWeight = 12/1000/1000 //M 每个点 pos + 颜色 + 法线 大概  
        const eachVisiCPointWeight = eachCloudPointWeight * 5    // 或 maxMemory / (6*1000*1000) 大概值接近 (再除以一个数是因为显示的要比内存中的耗更多资源
        const eachGltfPosWeight = 100/1000/1000  //M  每个顶点pos是3*4个字节？法线3*4和uv2*4  其实还有贴图 
        let posCount=0
        
        let eachTexPxWeight = 1 / 10 / 1000 / 1000   //不知道“图片缓存”会不会引起崩溃, 它不在“内存占用空间”中， 所以单位weight值设置小一点
        let panosWeight = viewer.images360.panos.filter(e=>e.depthTex).length * 0.7 + viewer.images360.tileDownloader.tilesCount * 512*512 * eachTexPxWeight //深度图和全景图
        let texArea = 0
        
        viewer.objs.children.forEach(e=>{
            if(!e.visible)return
            if(e.fileType == 'glb' || e.fileType == 'obj'){
                e.traverse((mesh)=>{
                    if(mesh.geometry){
                        posCount += mesh.geometry.attributes.position.count
                    }
                    if(mesh.material?.map){
                        texArea += mesh.material?.map.image.width * mesh.material?.map.image.height
                    }
                })
            }else if(e.fileType == '3dTiles'){
                  
            }
        })
         
        //获取点云的内存限制
        let objWeight = posCount*eachObjPosWeight +    texArea * eachTexPxWeight
        let laserWeight = Potree.numVisiblePoints  * eachCloudPointWeight //点云实际显示所占大小
        let laserMemoryWeight =  Potree.lru.numPoints * eachCloudPointWeight   //点云所使用内存大小
        let tiles3DWeight = (viewer.visiVertexCount || 0) * eachGltfPosWeight //M   3dTiles所占内存大小   
        let tiles3DMemoryWeight = viewer.tiles3dMemoryUsage / 1000 / 1000  //M   3dTiles显示的所占内存大小
        
        /* let min = 0.1, max = 6, minP = 100, maxP = 1000000; 
        let ratio = Math.round(math.linearClamp(score, minP, maxP, max, min ));  */
	    let rest = maxMemory - objWeight - tiles3DWeight - panosWeight        
        Potree.pointBudget = THREE.Math.clamp(Math.round(rest/eachVisiCPointWeight), Potree.config.pointDensity.low.pointBudget,   1.5*Potree.config.pointDensity.high.pointBudget) 
        //Potree.settings.maxLRUPoints
        //获取3dTiles的内存限制 
        let tiles3DMaxMemory = maxMemory - Math.round(objWeight + laserWeight + panosWeight)
        
        window.cesiumViewer && (tiles3DMaxMemory-=30)
        
        Potree.settings.tiles3DMaxMemory = THREE.Math.clamp(tiles3DMaxMemory , 30, Potree.config.tiles3DMaxMemory ) 
        
        
        
        
        //还存在的问题：仍然有隐患，因为没用到真实缓存的大小： tiles3DMemoryWeight  laserMemoryWeight， 它们比真实可见的要多。不使用是因为它们无法反应出实际需要的内存量，缓存是只增不减
        //obj等普通mesh限制不了
        
        
        //console.log('objWeight',objWeight.toFixed(1), 'laserMemoryWeight',laserMemoryWeight.toFixed(1), 'tiles3DWeight',tiles3DWeight.toFixed(1),  'pointBudget',Potree.pointBudget, 'tiles3DMaxMemory',tiles3DMaxMemory)
        
        
        //总内存 = 内存占用空间+图片缓存 ， obj的缓存比较多在图片中
        
       
        
        //尽量使任务管理器里的内存占用空间不超过2G
        /* 
            崩溃历史：
            
            cesium容易先崩溃，并弹窗报An error occurred while rendering.  Rendering has stopped.
            体育中心：http://192.168.0.140/index.html?caseId=1&app=1&token=1#/fuseEdit/path   
            罗敏电脑崩溃 ，报了ces的崩溃错误。内存占用空间2196M, memory.usedJSheapSize:1812M 崩溃时正在外部浏览模型（导览崩溃过），可能是3dtiles
        
        
         */
    },
    
     
      
    
    updateMemoryUsage(){//新  注意 模型即使隐藏也不会降低内存占用，只是会降低卡顿。  未支持3dgs
        //疑问：1 在不超过最大内存的前提下会因为显示太多模型崩溃吗？ 2如何获知每个浏览器最大内存支持？看了一圈，jsHeapSizeLimit都一样怎么办？
        //3dtiles（或模型）的大小是直接用文件大小还是根据点和贴图尺寸计算呢，感觉它会分成两部分，加载的和显示的，都需要考虑。
        //obj暂时不管其贴图大小, 因为顶点造成的不仅是内存还有卡顿所以先只看顶点
        if(window.stopUpdateM) return
        
        //let start = performance.now();
        
        let old = {
            pointBudget : Potree.pointBudget,
            tiles3DMaxMemory: Potree.settings.tiles3DMaxMemory,
            maxLRUPoints : Potree.settings.maxLRUPoints
        }
        
        const maxMemory =  1500 //1500 //M 整体占用内存限制 (不考虑峰值，要等静止后退下来的值)      //什么都不加载可能就占了300M
        const eachObjPosWeight = 100/1000/1000  //M  每个顶点pos是3*4个字节？法线3*4和uv2*4 + faceIndex比较难说  
        const eachCloudPointWeight = 70/1000/1000 //M 每个点 pos + 颜色 + 法线 大概 根据测试算出来也是这个值   0.00007
        //const eachVisiCPointWeight = eachCloudPointWeight * 5    // 或 maxMemory / (6*1000*1000) 大概值接近 (再除以一个数是因为显示的要比内存中的耗更多资源
        const eachTexPxWeight = 1 / 10 / 1000 / 1000   //每个模型都不一样只能取个大概
        const eachTexPxWeightTiles = eachTexPxWeight * 1.5 //感觉3dtiles的比glb和obj都高很多，是因为文件还在缓存里吗
    
        
        let posCount=0,   posCount3dTiles = 0, visiPosCount = 0
        
 
        let panosWeight = 0.1 * (viewer.images360.panos.filter(e=>e.depthTex).length * 0.7 + viewer.images360.tileDownloader.tilesCount * 512*512 * eachTexPxWeight) //深度图和全景图(但似乎是额外放图片缓存里？因为没有增加tex, panoExit后就dispose了， 所以乘以一个小系数。担心图片缓存也可能导致崩溃)
        //let texArea = 0, texArea3dTiles = 0, visiTexArea = 0
        //texArea = viewer.memoryModelCountInfo.otherTexArea + viewer.memoryModelCountInfo.tileTexArea
        //posCount = viewer.memoryModelCountInfo.otherPosCount + viewer.memoryModelCountInfo.tilePosCount 
        //posCount3dTiles = viewer.memoryModelCountInfo.tilePosCount
        //texArea3dTiles = viewer.memoryModelCountInfo.tileTexArea
         
         
       
        let otherModelWeight = viewer.memoryModelCountInfo.otherPosCount*eachObjPosWeight + viewer.memoryModelCountInfo.otherTexArea * eachTexPxWeight
        let tilesWeight = (viewer.memoryModelCountInfo.tilePosCount*eachObjPosWeight + viewer.memoryModelCountInfo.tileTexArea * eachTexPxWeightTiles) * 1.5  //3dtiles太占内存了
        let modelWeight = tilesWeight + otherModelWeight //posCount*eachObjPosWeight + texArea * eachTexPxWeight
        //为何obj、glb过后会降很多，而3dtiles降的很少？ 不过考虑到glb更卡，且加载瞬间确实占用高，还是不把otherModelWeight改少了吧
         
        Potree.tilesWeight = tilesWeight
        Potree.modelWeight = modelWeight//所有模型
        //Potree.modelVisiWeight = visiPosCount*eachObjPosWeight + visiTexArea * eachTexPxWeight 
        
        //经测试，发现模型并不会因为不可见而降低内存，3dtiles加载满了之后拉远，可见weight下降了但内存没降。
        //so,需要测试崩溃是否只与内存有关，如果内存爆了，但都不可见，非常流畅，还会崩溃吗
        
        
         
        
         
        let laserVisiWeight = Potree.numVisiblePoints  * eachCloudPointWeight //点云实际显示所占大小
        let laserWeight =  Potree.lru.numPoints * eachCloudPointWeight   //点云所使用内存大小
        Potree.laserWeight = laserWeight


        let fixedPart = modelWeight - tilesWeight + panosWeight  + (window.cesiumViewer ? 30:0) //ces:刚加载时60，静止一段时间后20
        Potree.allWeight =  Potree.laserWeight + fixedPart + tilesWeight 
        let tiles3dMemoryUsage = viewer.tiles3dMemoryUsage/1024/1024
         
        
        let overRatio = Potree.allWeight / maxMemory 
        
        let visiRatio1 = posCount3dTiles == 0 ? Infinity : viewer.visiVertexCount / posCount3dTiles 
        let visiRatio2 = Potree.lru.numPoints == 0 ? Infinity : Potree.numVisiblePoints / Potree.lru.numPoints  
        let resolved 
         
        let restMemory = maxMemory - fixedPart //去除固定的part后
             
         
        if(overRatio > 1){
            
            
            
            const MinRestMemory = 400 
            if(restMemory < MinRestMemory){ 
                Common.intervalTool.isWaiting('updateMemoryUsage', ()=>{  
                    let warnText  
                    if(this.lastMemoryState.restMemory < 0){
                        warnText = '固定内存已经超额！没有剩余空间给点云和3dtiles。' 
                    }else if(this.lastMemoryState.restMemory < MinRestMemory){
                        warnText = '固定内存过多！' 
                    }
                    if(warnText){
                        warnText += '请减少glb类模型, 当前固定内存占用大小：' + fixedPart                
                        console.error(warnText)
                    }
                },  10000)
            }
            
            
            
            
            if(visiRatio1 < visiRatio2 || Potree.lru.numPoints <= Potree.config.pointDensity.low.pointBudget / 10 * 1.1 ){//占比小的需要缩减缓存容器
                  
                if(Potree.settings.tiles3DMaxMemory < tiles3dMemoryUsage / 2 && this.lastMemoryState.tiles3dMemoryUsage == tiles3dMemoryUsage //已经很难减少了，这时候tiles3DMaxMemory很可能降到个位数
                || Potree.settings.tiles3DMaxMemory < 2){
                    resolved = false
                }else{
                    Potree.settings.tiles3DMaxMemory = Math.min(tiles3dMemoryUsage, Potree.settings.tiles3DMaxMemory)//先降到已使用的数据量
                    Potree.settings.tiles3DMaxMemory > 1 && (Potree.settings.tiles3DMaxMemory *= 0.8 ) //注意，降低该值不一定会降低 tiles3dMemoryUsage，只有后续改变sse才行 viewer.tiles3dMemoryUsage / tiles3DMaxMemory 可能大于1
                    resolved = true
                }
            }
            if(!resolved){// visiRatio1 > visiRatio2   
                
                if( visiRatio2 > 0.9){//压缩太小了，或者说没什么缓存就超额了，只能继续减少显示个数
                    if(Potree.pointBudget < Potree.config.pointDensity.low.pointBudget){
                        //console.error('Potree.pointBudget已经很小了！', Potree.pointBudget)
                    }else{
                        Potree.pointBudget *= 0.85 
                        resolved = true
                    } 
                }else{   
                    Potree.pointBudget = THREE.Math.clamp(Potree.numVisiblePoints, Potree.config.pointDensity.low.pointBudget / 10,   Potree.pointBudget*0.8 )//先往降到可见数量方向降 (当画面中可见点确实很少时允许降低到low之下)
                    
                    Potree.settings.maxLRUPoints = Math.min(Potree.lru.numPoints, Potree.settings.maxLRUPoints);//先降到已使用的数量
                    Potree.settings.maxLRUPoints *= 0.8    
                    resolved = true
                } 
            }
           
        }else{//恢复部分好难写
            //优先恢复实际使用(可见)内存，然后是缓存
            //额外缓存少的，实际使用内存被压缩的概率也大
            //visiRatio1 == Infinity && (visiRatio1 = 0)  //因这里大的才会被改所以改一下
            
            visiRatio1 *= tiles3dMemoryUsage / Potree.settings.tiles3DMaxMemory //用point数量有时候不准，明明内存不够了不可见的tile还存在，所以×memory的占比
            visiRatio2 = Potree.pointBudget == 0 ? 0 : Potree.numVisiblePoints / Potree.pointBudget //使用率越高，说明越需要内存. 因为恢复时先提高使用内存所以改一下
             
            let r = Math.min(1, visiRatio1 , visiRatio2 ) //如果另一个visiRatio 很小，s就可以再小一些，使内存超过一点，然后朝另一方倾斜，另一方去缩减
            let s = 1 - Math.max(0.8,  overRatio * r )
             
            //太难判断是哪个更需要内存了，所以两个都涨吧 
           
           
            if(visiRatio2 > visiRatio1){ 
                let s_ = visiRatio2 / (visiRatio1 + visiRatio2) * s + 1
                const addCount = 500000 * s_
                if(Potree.pointBudget < Potree.config.pointDensity.high.pointBudget*0.9){
                    Potree.pointBudget += addCount
                }else{
                    Potree.settings.maxLRUPoints += addCount
                }
                 
            } 
                    
                
            if(Potree.settings.tiles3DMaxMemory < Potree.config.tiles3DMaxMemory ){  
                let s_ = visiRatio1 / (visiRatio1 + visiRatio2) * s + 1
                const addCount = 20 * s_
                Potree.settings.tiles3DMaxMemory += addCount 
                Potree.settings.tiles3DMaxMemory = Math.min(Potree.settings.tiles3DMaxMemory, Potree.config.tiles3DMaxMemory)
            }
                   
            
            resolved = true
        } 
        
        let min = overRatio > 1 ? 1.1 : 1.5,   max = 5;  
        Potree.settings.maxLRUPoints = THREE.Math.clamp(Potree.settings.maxLRUPoints , Potree.pointBudget * min, Potree.pointBudget * max)
                 
        //压缩时先压缩缓存，然后是使用内存； 恢复时相反。
        
        //3dtiles不像点云那样可以在加载时拦截，使不高于tiles3DMaxMemory，只能自动动态调节maxSSE，所以有可能调节完还是降低不了
          
        //一次只更新一点，一点点调节，因为可能不是一个原因造成
          
        
          
        
        let changed
        if(old.pointBudget != Potree.pointBudget || old.tiles3DMaxMemory != Potree.settings.tiles3DMaxMemory || old.maxLRUPoints != Potree.settings.maxLRUPoints ){
                
            if(old.tiles3DMaxMemory != Potree.settings.tiles3DMaxMemory){
                viewer.setAllTilesets(model=>{ 
                    model.runtime.getTileset().nextForceUpdate = true  
                    model.runtime.getTileset().needRenderNext = true 
                })
            }else{
                viewer.dispatchEvent('content_changed')
            } 
            changed = true
        }
        
       {
            
            let mSSE = math.linearClamp(Potree.fpsRendered2, [2, 52], [500,  70]) //有效降低卡顿 和贴图变白概率。越卡越提高msse
            let r = tiles3dMemoryUsage / Potree.settings.tiles3DMaxMemory 
            viewer.setAllTilesets(model=>{
                let tileset = model.runtime.getTileset()
                tileset.options.initialMaxSSE = mSSE  
                let e = tileset.options.maximumScreenSpaceError * THREE.Math.clamp(r, 0.8, 1.2)
                e = THREE.Math.clamp(e, mSSE, mSSE+400) //如果有很卡的模型可能需要1000，但太高了降回来很慢，就假设模型都正常的吧
                tileset.options.maximumScreenSpaceError = e
           
            })   
        }
        
        //针对很卡的设备：（卡的也容易崩溃）
        Potree.config.pointDensity.high.pointBudget = math.linearClamp(Potree.fpsRendered2, [2, 50], [1e6,  6e6])
        
         
        
        
        let history = this.lastMemoryState.history || []
        history.push(overRatio) 
        this.lastMemoryState = {
            tiles3dMemoryUsage,
            history,
            restMemory            
        }
        
       
        
        
        //console.log('cost', performance.now() - start)  
        return changed && ((overRatio > 1.1 || overRatio < 0.9) ||  
            history.slice(-7).length < 7 || history.slice(-7).some(overRatio=>overRatio > 1.1 || overRatio < 0.9) //后十个都在最大内存范围左右抖动，则不继续更新，直到相机变化  
        )
       
          
       
	    //难点：要防止抖动，否则3dtiles的sse变大变小，相机静止时还在清晰和模糊间变来变去。好在点云是可以较精细调节，tile是间接控制的
        
        //模型删除后还会占用一定内存，尤其是3dtile几乎降不了，怎么回事？是否删除的模型还要算进来 
    },
    
    
    
     
    
    
    
    
    setGroundPlaneImg(src,scale,angle){//设置地面图
        
        this.goundScale = scale || 1, this.goundAngle = angle || 0
        let oldSrc = this.curGroundImgSrc
        this.curGroundImgSrc = src
        const ratio = 0.03
        
        
        if(src){
            if(oldSrc == src && this.groundPlane.material.map.image){ //仅修改大小
                const s = ratio * this.goundScale
                let {width, height} = this.groundPlane.material.map.image
                this.groundPlane.scale.set(width*s, height*s)  
                viewer.dispatchEvent('content_changed')
                this.groundPlane.rotation.z = THREE.Math.degToRad(this.goundAngle)
                return
            }
            
            let map = texLoader.load(src,(tex)=>{
                if(this.curGroundImgSrc == src){
                    const s = ratio * this.goundScale
                    this.groundPlane.scale.set(tex.image.width*s, tex.image.height*s) 
                    this.groundPlane.rotation.z = THREE.Math.degToRad(this.goundAngle)
                    viewer.dispatchEvent('content_changed')
                } 
            })
            Potree.Utils.makeTexDontResize(map)          
            if(!this.groundPlane){
                this.groundPlane = new THREE.Mesh(new THREE.PlaneBufferGeometry(1,1,1), new THREE.MeshBasicMaterial({
                    map,  
                    side : 2,
                    
                }))
                viewer.scene.scene.add(this.groundPlane)
                this.groundPlane.position.z = 0.1
            }else{
                this.groundPlane.material.map = map
            }
            
            Potree.Utils.updateVisible(this.groundPlane,'show',true )
        }else{
            this.groundPlane && Potree.Utils.updateVisible(this.groundPlane,'show',false )
        }  
    }
    
    
    
    
    
     
    
}   
    
    /* 
    watch:
        performance.memory.usedJSHeapSize / 1e6 
        Potree.settings.tiles3DMaxMemory 
        viewer.tiles3dMemoryUsage 
        Potree.tilesWeight 
        Potree.modelWeight 
        Potree.modelVisiWeight 
        Potree.allWeight 
        Potree.lru.numPoints 
        Potree.pointBudget 
        Potree.numVisiblePoints 
        Potree.settings.maxLRUPoints 

        
     */
    
export default MergeEditor  
    
     
     
       
/* class titleLabel extends THREE.Shim.FollowRootObject{
    constructor(o){ 
        super(o.root)
        this.l
    }
    
    
    
    
} */
        
/*   

note: 

要注意getHoveredElements只在getIntersect时才使interactables包含加载的model， 也就是model上不能有使之成为interactables的事件，否则在鼠标hover到模型上开始转动的一瞬间很卡。

控制台断开完全重合的漫游点的方法
window.pano1 = viewer.modules.PanoEditor.selectedPano //选中第一个点后输入这行，得到第一个漫游点
window.pano2 = viewer.modules.PanoEditor.selectedPano //选中第二个点后输入这行，得到第二个漫游点
viewer.modules.PanoEditor.linkChange(window.pano1, window.pano2, 'remove') //断开链接


如果直接刷新，内存管理器中的内存会有之前的残留。不知道是不是真实的加入这次的内存了。
并且，如果第一次加载的是几乎不占内存的模型，如glb，内存也会一下子涨30，不过等一会儿会降。4M的3dtiles会涨60.   每次加载模型后都会内存突增，但过后会降。 为何obj、glb过后会降很多，而3dtiles降的很少。？

国产系统8192贴图直接出错，4096的贴图过多也出错。texImage: Driver ran out of memory during upload.

*/