import * as THREE from "../../../../libs/three.js/build/three.module.js";
import {LineDraw, MeshDraw} from "../../utils/DrawUtil.js";
import math from "../../utils/math.js";






const verticalLine = new THREE.Line3()

//控制点和边的合集。具有可以拖拽修改的功能，拖拽时能防止线相交。
export class ctrlPolygon extends THREE.Object3D { 
    constructor (type, prop) {
        super()
        this.type = type
        
        this.maxMarkers = Number.MAX_SAFE_INTEGER;
       
         
        this.transformData(prop);
        for(let i in prop){
            this[i] = prop[i]
        }
        
        if((this.atPlane || this.showArea) && this.closed && this.dimension == '2d'){
            this.areaPlane = this.createAreaPlane(); 
            this.add(this.areaPlane)
        }
        
        //数据--刚开始一定是空的
        this.points = []; 
        //mesh 不一定有
        this.markers = []; 
		this.edges = [];
        
        this.center
        
        
        
        
    }
    
    initData(prop){
        //开始加数据  
        
        prop.dataset_points && (this.dataset_points = prop.dataset_points)
        prop.datasetId && (this.datasetId = prop.datasetId)
        prop.points_datasets && (this.points_datasets = prop.points_datasets)
        
        if(Potree.settings.editType == 'merge' || this.measureType == 'MulDistance Ring'){ //融合页面没有地图，measure的不需要指定datasetId，每个点都有各自的datasetId，跟着各自的模型走
            if(this.dataset_points){
                this.dataset_points = this.dataset_points.map(e=>{
                    return e && new THREE.Vector3().copy(e) 
                })
                prop.points = this.dataset_points.map((p,i)=>{
                    return Potree.Utils.datasetPosTransform({fromDataset:true, datasetId:this.points_datasets[i], position: p})
                })
                if(prop.points.some(e=>e == void 0)){
                    return false
                }               
            }else{
                this.dataset_points = []
            }
        } 
        
        
        
        if(prop.points){ 
            
            for(const p of prop.points){
                const pos = new THREE.Vector3().copy(p) 
                this.addMarker({point:pos}); 
            }
            
            
            if(Potree.settings.editType != 'merge' && this.measureType != 'MulDistance Ring'){ 
                if(this.datasetId != void 0){//初始化位置
                    if(this.dataset_points){
                        this.dataset_points = this.dataset_points.map(e=>{
                            return e && new THREE.Vector3().copy(e) 
                        })
                        this.transformByPointcloud() //根据dataset_points和this.datasetId生成points  
                    }  
                }else{
                    if(prop.dataset_points && prop.dataset_points.some(e=>e != void 0)){
                        console.error('存在测量线的datasetId为空而dataset_points有值，请检查并删除:'+this.sid)//存在过的bug，原因未知，可能是后台处理dataset时替换的错误：http://192.168.0.21/index.php?m=bug&f=view&bugID=23601
                        console.log(this)
                    }
                } 
            }  
            
            this.facePlane = this.getFacePlane()
            this.getPoint2dInfo(this.points)
            
            this.update({ifUpdateMarkers:true})
            //this.dragChange(new THREE.Vector3().copy(prop.points[prop.points.length-1]), prop.points.length-1); 
            this.setSelected(false )
            this.markers.forEach(marker=>{marker.dispatchEvent('addHoverEvent') })
            return true
        }
    }
    
    
    
    
    
    addMarker(o={}){
        var index = o.index == void 0 ? this.points.length : o.index  //要当第几个
        
        this.points = [...this.points.slice(0,index), o.point, ...this.points.slice(index,this.points.length)]
		//this.points.push(o.point);
        if(o.dataset_point){
            this.dataset_points = [...this.dataset_points.slice(0,index), o.dataset_point, ...this.dataset_points.slice(index,this.dataset_points.length)]
        }
        if(o.points_dataset){
            this.points_datasets = [...this.points_datasets.slice(0,index), o.points_dataset, ...this.points_datasets.slice(index,this.points_datasets.length)]
        }
        
        
        
        
        if(o.marker){
            this.add(o.marker)
            this.markers = [...this.markers.slice(0,index), o.marker, ...this.markers.slice(index,this.markers.length)]
            this.updateMarker(o.marker, o.point)
            o.marker.addEventListener('drag', this.dragMarker.bind(this),{importance:2});
            o.marker.addEventListener('drop', this.dropMarker.bind(this),{importance:2});
             
            o.marker.createTime = Date.now()
            
            let addHoverEvent = (e)=>{
                let mouseover = (e) => { 
                    this.setMarkerSelected(e.object, 'hover', 'single'); 
                    viewer.dispatchEvent({
                        type : "CursorChange", action : "add",  name:"markerMove"
                    }) 
                };
                let mouseleave = (e) => { 
                    this.setMarkerSelected(e.object, 'unhover', 'single'); 
                    viewer.dispatchEvent({
                        type : "CursorChange", action : "remove",  name:"markerMove"
                    })
                } 
                o.marker.addEventListener('mouseover', mouseover);
                o.marker.addEventListener('mouseleave', mouseleave);
                
                o.marker.addEventListener('startDragging', (e)=>{//for mobile
                    this.setMarkerSelected(o.marker, 'hover', 'single'); 
                    this.dispatchEvent('startDragging')
                });
                o.marker.addEventListener('drop', (e)=>{//for mobile
                    this.setMarkerSelected(o.marker, 'unhover', 'single'); 
                });
                
                o.marker.removeEventListener('addHoverEvent',addHoverEvent) 
            }
            o.marker.addEventListener('addHoverEvent',addHoverEvent)//当非isNew时才添加事件
            if(!this.isNew){
                o.marker.dispatchEvent('addHoverEvent')
            }
            
        } 
        
        if(o.edge){
            this.add(o.edge)
            this.edges = [...this.edges.slice(0,index), o.edge, ...this.edges.slice(index,this.edges.length)]
        } 
        
         
    }
    
    
    
     
    dragMarker(e){
        
        var I, atMap 
        
        if(e.hoverViewport != e.drag.dragViewport){//不能使用e.dragViewport，要使用drag中的，因为drag中存储的要一直继承下来，不因mouseup了而改变。
            viewer.dispatchEvent({
                type : "CursorChange", action : "add",  name:"polygon_AtWrongPlace"
            })
            return
        }
        if(e.drag.pointerDelta.length() == 0 && !this.isNew){ //部分设备（华为matePad11）在touchstart后立即执行了touchmove，导致marker立即移动，需要屏蔽..（刚创建时也会是0）
            return  
        }
        viewer.dispatchEvent({
            type : "CursorChange", action : "remove",  name:"polygon_AtWrongPlace"
        })
        
        atMap = e.drag.dragViewport.name == 'mapViewport' 
        
        if(atMap && this.unableDragAtMap){ 
            e.drag.object = null //取消拖拽
            return 
        } 
        e.drag.object.isDragging = true 
        
        
        I = e.intersect && (e.intersect.adsorption ? e.intersect.location : (e.intersect.orthoIntersect || e.intersect.location))
        
          
        if(viewer.inputHandler.pressedKeys[18] || Potree.settings.dragPolyBeyondPoint&&!I ){//alt    dragPolyBeyondPoint可以平移拖拽到无点的地方---测试用
            let i = this.markers.indexOf(e.drag.object);
            I = this.points[i].clone()
               
            const projected = I.clone().project(e.drag.dragViewport.camera);
            projected.x = e.pointer.x
            projected.y = e.pointer.y
             
            const unprojected = projected.clone().unproject(e.drag.dragViewport.camera);
            I.copy(unprojected); 
        } 
         
         
         
         
        if (I) {  
            let i = this.markers.indexOf(e.drag.object);
            if (i !== -1) {  
                this.dragChange(I.clone(), i, atMap) 
                
               
                if(this.points_datasets){
                    if(e.intersect.pointcloud) this.points_datasets[i] = e.intersect.pointcloud.dataset_id
                    else if(e.intersect.object) this.points_datasets[i] = e.intersect.object.dataset_id
                    else{ 
                        if(this.measureType == 'MulDistance Ring'){//因为它的每个point跟着各自的dataset走，而不是整体的dataset
                            let pointcloud = viewer.findClosestDatasetOnMap(I) || viewer.scene.pointclouds[0]
                            this.points_datasets[i] = pointcloud.dataset_id
                        }else this.points_datasets[i] = null
                    }
                }
            }
            this.editStateChange(true)
            return true
            
        } 
        
        
    };
    
    
    
    
    
    
    dragChange(intersectPos, i, atMap){
        let len = this.markers.length 
        let oldPoint = this.points[i]; 
        if(atMap){
            intersectPos.setZ(oldPoint.z) //在地图上拖拽，不改变其高度。
        }
        let location = intersectPos.clone()
        
        
        
        if(this.faceDirection && this.maxMarkers == 2 && len == 2){//add 固定方向的点不直接拖拽
            var p1 = this.markers[0].position
            if(this.faceDirection == 'horizontal'){
                var projectPos = location.clone().setZ(p1.z)
            }else{
                var projectPos = p1.clone().setZ(location.z)
            }
            //var p2 = p1.clone().add(this.direction)
            //var projectPos = math.getFootPoint(location, p1, p2)
            
            
            LineDraw.updateLine(this.guideLine, [location, projectPos])
            location = projectPos
            this.guideLine.visible = true
        }else if( len > 1 ){ 
             
            var points = this.points.map(e=>e.clone())
            points[i].copy(location) //算normal需要提前确认point
            
            //若为定义了面朝向的矩形
            if(this.faceDirection == 'horizontal'){
                if(len == 2){
                    location.setZ(points[0].z) 
                }
                if(!this.facePlane){//一个点就能确定面
                    this.facePlane = new THREE.Plane().setFromNormalAndCoplanarPoint( new THREE.Vector3(0,0,1), this.points[0]  )
                }
            }else if(this.faceDirection == 'vertical'){//当有两个点时， 有两个方向的可能
                if(len == 2){
                    if(this.isRect){
                        let vec = points[0].clone().sub(location) 
                        if(Math.sqrt(vec.x*vec.x+vec.y*vec.y) > Math.abs(vec.z) ){//水平（高度差小于水平距离时）
                            location.setZ(points[0].z) 
                            //this.cannotConfirmNormal = false;//能确定面为水平方向
                        }else{//垂直 （当两点一样时也属于这种）
                            location.setX(points[0].x);
                            location.setY(points[0].y);
                            //this.cannotConfirmNormal = true; //不能确定面，因第三点可绕着纵轴线自由移动
                        }
                    }
                }else{ 
                    {//判断cannotConfirmNormal. 如果前几段都在竖直线上，就不能固定出面方向。
                        this.cannotConfirmNormal = true
                        let max = this.isRect ? 1 : len-2 
                        for(let i=0;i<max;i++){
                            let p1 = points[i].clone()
                            let p2 = points[i+1].clone()
                            let vec = p1.sub(p2);
                            if(vec.x != 0 || vec.y != 0){
                                this.cannotConfirmNormal = false
                                break;
                            } 
                        } 
                    }
                    
                    if(!this.facePlane || this.cannotConfirmNormal){//三个点且为水平方向时，计算面
                          
                        var points_ = points.map(e=>new THREE.Vector2(e.x,e.y))
                        var points2 = getDifferentPoint(points_, 2); 
                        if(points2){
                            let normal = math.getNormal2d({p1:points2[0], p2:points2[1]})  
                            normal = new THREE.Vector3(normal.x, normal.y, 0)
                            this.facePlane = new THREE.Plane().setFromNormalAndCoplanarPoint( normal, this.points[0]  )
                        } 
                    }
                }
            } 

            if(len > 2){  
                
                if(!this.faceDirection && this.showArea){ 
                    if(len == 3 || this.isRect) this.cannotConfirmNormal = true //当第三个点固定后（有四个点时）才能固定面
                    if(!this.facePlane || this.cannotConfirmNormal){
                        var points3 = getDifferentPoint(points, 3);//只有找到三个不同的点算拥有面和area
                        if(points3){
                            this.facePlane = new THREE.Plane().setFromCoplanarPoints(...points3 )
                        }
                    }
                }
                
                if(this.atPlane && this.facePlane && !this.cannotConfirmNormal  ){//之后加的点一定要在面上  
                    if(atMap){ 
                        //地图上用垂直线，得到和面的交点。
                        verticalLine.set(location.clone().setZ(100000), location.clone().setZ(-100000))//确保长度范围覆盖所有测量面 
                        location = this.facePlane.intersectLine(verticalLine, new THREE.Vector3() )
                        if(!location) return; 
                    }else{ 
                        location = this.facePlane.projectPoint(intersectPos, new THREE.Vector3() )
                    }
                }  
                 
                points[i].copy(location)//再copy确认一次
                
                
                if(len == 3 && this.faceDirection == 'horizontal' && this.closed){ //normal方向还不确定 会影响label在里侧还是外侧
                    let facePlane = new THREE.Plane().setFromCoplanarPoints(...points)  
                    if(facePlane.normal.z && facePlane.normal.z * this.facePlane.normal.z < 0){ 
                        this.facePlane.normal.z *= -1,  this.facePlane.constant *= -1 
                        //console.log(this.facePlane.normal, this.facePlane.constant)
                    }
                      
                }
                
                
                if(this.isRect){ //是矩形 （即使没有faceDirection也能执行）
                    //根据前两个点计算当前和下一个点
                    var p1 = points[(i-2+len)%len]
                    var p2 = points[(i-1+len)%len]
                    if(p1.equals(p2)){//意外情况：重复点两次 ( bug点，改了好多遍)
                        if(this.faceDirection == 'vertical'){
                            p2.add(new THREE.Vector3(0,0,0.0001))
                        }else{
                            p2.add(new THREE.Vector3(0,0.0001,0))
                        } 
                    } 
                    //p3 : location 
                    var foot = math.getFootPoint(location, p1, p2)//p2 修改p2到垂足的位置
                    var vec = foot.clone().sub(location)
                    var p4 = p1.clone().sub(vec) 
                     
                    
                    points[(i-1+len)%len].copy(foot) 
                    points[(i+1)%len].copy(p4) 
                    this.setPosition((i-1+len)%len, foot);//p2
                    this.setPosition((i+1)%len, p4);
                    
                }  
                
 
                this.getPoint2dInfo(points)
                 
                var isIntersectSelf = this.atPlane && this.closed && !this.isRect && this.point2dInfo && this.intersectSelf(this.point2dInfo.points2d)//检测相交
                this.isIntersectSelf = isIntersectSelf
                if(isIntersectSelf){//not-allowed
                    if(!this.isNew && isIntersectSelf == 'lastLine') this.isIntersectSelf = 'all'  //已经画好了就不用特别对待最后一条线
                    if(this.isIntersectSelf == 'lastLine'){ 
                        Potree.Utils.updateVisible(this.areaPlane, 'intersectLastLine',  false)
                        Potree.Utils.updateVisible(this.areaLabel, 'intersectLastLine',  false)
                    }else{ 
                        viewer.dispatchEvent({
                            type : "CursorChange", action : "add",  name:"polygon_isIntersectSelf"
                        }) 
                        return  
                    } 
                } 
                if(!this.isIntersectSelf){
                    this.areaPlane && Potree.Utils.updateVisible(this.areaPlane, 'intersectLastLine',  true)
                    this.areaLabel && Potree.Utils.updateVisible(this.areaLabel, 'intersectLastLine',  true) 
                } 
                if(!this.isIntersectSelf || this.isIntersectSelf == 'lastLine' ){
                    viewer.dispatchEvent({
                        type : "CursorChange", action : "remove",  name:"polygon_isIntersectSelf"
                    })
                }
            }
            
            var showGuideLine = len>1 && (this.faceDirection || len > 3)
            if(showGuideLine && this.guideLine){
                LineDraw.updateLine(this.guideLine, [intersectPos, location])
                this.guideLine.visible = true
            } 
             
            //console.log(this.points.map(e=>e.toArray())) 

        } 
         
        
        if(this.restrictArea){  
            let holes = this.restrictArea.holes.concat(this.restrictArea.parentHoles)           
            let holesPoints = holes.filter(e=>e!=this && e.points.length>2).map(e=>e.points) 
            if(!math.isPointInArea(this.restrictArea.points, holesPoints, location)){
                viewer.dispatchEvent({
                    type : "CursorChange", action : "add",  name:"polygon_AtWrongPlace"
                })
                this.isAtWrongPlace = true
                return
            }
            //就不处理相交线了。 有个缺点：floor上的hole可以限制room，但hole不受room限制，会导致room的marker被框在hole里而动不了。只能去调整hole了
        } 
        
        
        
        viewer.dispatchEvent({
            type : "CursorChange", action : "remove",  name:"polygon_AtWrongPlace"
        })
        this.isAtWrongPlace = false
        this.setPosition(i, location); 
        this.update({index: this.isRect ? null : i})
        
        this.dispatchEvent({type:'dragChange', index:i})
        
        
        
    }
    
    dropMarker(e){
        //console.log('dropMarker')
        if (this.isNew && e.pressDistance>Potree.config.clickMaxDragDis){//拖拽的话返回
            return this.continueDrag(null,e)   
        } 
         
        if(e.hoverViewport != e.drag.dragViewport){//copy from dragMarker, for sitemodel， only mapViewport can be dropped
            return this.continueDrag(null,e)    
        }
          
 
        if(e.isTouch){ 
            if(e.hoverViewport != viewer.mainViewport && this.unableDragAtMap){
                viewer.dispatchEvent({type:'reticule_forbit', v:true})
                //console.log('reticule_forbit',true)
                return this.continueDrag(null,e)    
            }else{
                viewer.dispatchEvent({type:'reticule_forbit', v:false})
                //console.log('reticule_forbit',false)
            }
            this.isNew && this.dragMarker(e) //isNew触屏点击时必须先更新下点，因为指尖不在屏幕上时没更新。但对已经创建的marker点击时不应该更新
            
        }
         
        
        if (e.button != THREE.MOUSE.RIGHT && (//右键click的话继续执行，因为会停止
                this.isIntersectSelf == 'all' && this.isNew //有线相交了
                || this.isAtWrongPlace && this.isNew
                || !e.isAtDomElement && this.isNew//如果是刚添加时在其他dom点击， 不要响应
                ||  e.hoverViewport != viewer.mainViewport && this.unableDragAtMap //垂直的测量线不允许在地图上放点
                || this.isNew && !getDifferentPoint(this.points, this.points.length )   //不允许和之前的点相同, 但这句在点云稀疏时会导致难结束 
            ) 
        ){
            return this.continueDrag(null,e)    
        } 
         
        //console.log('drop marker' )
         
        let i = this.markers.indexOf(e.drag.object); 
        if (i !== -1) {
            this.dispatchEvent({
                'type': 'marker_dropped', 
                'index': i
            });
            if(this.markers.length>2 && this.facePlane)this.cannotConfirmNormal = false
            this.guideLine &&(this.guideLine.visible = false)
        }
        
       
        
        this.setMarkerSelected(e.drag.object, 'unhover', 'single') 
        
        this.editStateChange(false)
        
        
        
        
        e.drag.endDragFun && e.drag.endDragFun(e)//  addmarker
         
        //if(this.changeCallBack)this.changeCallBack()
           
        return true
    };
    
     
    getFacePlane(){//最普通一种get方法，根据顶点。且假设所有点已经共面,且不重合
    
        if(/* !this.atPlane ||  */this.points.length<3) return
        /* this.facePlane = new THREE.Plane().setFromCoplanarPoints(...this.points.slice(0,3) ) */ 
        let facePlane = this.facePlane
        if(!this.atPlane || !facePlane){//多折线 没有实时更新facePlane所以重新算
            let normal = new THREE.Vector3, len = this.points.length - 2
            for(let i=0;i<len;i++){ //获取normal的顺序方法必须和setFromCoplanarPoints一致
                let vec0 = new THREE.Vector3().subVectors(this.points[i+2], this.points[i+1], )
                let vec1 = new THREE.Vector3().subVectors(this.points[i], this.points[i+1])
                let nor = vec0.cross(vec1).normalize(); 
                normal.add(nor)
            }
            normal.normalize(); 
            facePlane = new THREE.Plane().setFromNormalAndCoplanarPoint(normal,  this.points[0])  
        } 
        return facePlane
    
    }
    
    getPoint2dInfo(points){ //在更新areaplane之前必须更新过point2dInfo
        if(this.facePlane && this.atPlane){ 
            var originPoint0 = points[0].clone() 
            var qua = math.getQuaBetween2Vector(this.facePlane.normal, new THREE.Vector3(0,0,1), new THREE.Vector3(0,0,1));
            let points2d = points.map(e=>e.clone().applyQuaternion(qua))  
        
            this.point2dInfo = {
                originPoint0 ,
                points2d,
                quaInverse : qua.clone().invert()
            } 
        }    
    }
    
    
    
    
    setPosition (index, position) {//拖拽后设置位置
		let point = this.points[index];
		point.copy(position);
        /* if(this.datasetId){
            this.dataset_points[index] = Potree.Utils.datasetPosTransform({toDataset:true, datasetId:this.datasetId, position:point.clone()})
        } */
        
        /* if(Potree.settings.editType == 'merge'){ 
            this.dataset_points[index] = Potree.Utils.datasetPosTransform({toDataset:true,this.points_datasets[i], position:point.clone()})
        } */
        
        let marker = this.markers[index];  
        this.updateMarker(marker, point)
 
	 
	} 
    
    updateMarker(marker, pos){
        marker.position.copy(pos);
        marker.waitUpdate();
    }
    
    
    intersectSelf(points2d){//add
        var len =  points2d.length
        for(var i=0;i<len;i++){
            for(var j=i+2;j<len;j++){
                if(Math.abs(j-len-i)<2)continue;//不和邻边比
                
                var p1 =  points2d[i]
                var p2 =  points2d[i+1]
                var p3 =  points2d[j]
                var p4 =  points2d[(j+1)%len] 
                if(p1.equals(p2) || p3.equals(p4) || p1.equals(p3) || p2.equals(p3) || p1.equals(p4) || p2.equals(p4))continue 
              
                var line1 = [p1,p2]
                var line2 = [p3,p4]
                var intersect = math.isLineIntersect(line1, line2, false, 0.001)
                if(intersect){
                    if(i==len-1 || j==len-1){//最后一条线。如果还没绘制完，最后的线还没定下，可被允许继续绘制，但无法显示面积。
                        return 'lastLine'
                    }else{
                        return 'all'
                    }
                     
                    break
                } 
            }
        }
          
    }
	
    removeMarker (index) {
        
		this.points.splice(index, 1); 
        
        const marker = this.markers[index]
		//this.remove(marker); 
        this.markers.splice(index, 1);   
        marker.dispatchEvent({type:'dispose'})
        
        
		let edgeIndex = index           //(index === 0) ? 0 : (index - 1);
        const edge = this.edges[edgeIndex]
        if(edge){
            this.remove(edge);
            this.edges.splice(edgeIndex, 1);
            edge.dispatchEvent({type:'dispose'})
        }
        this.point2dInfo && this.point2dInfo.points2d.splice(index, 1); //add

        this.dispatchEvent({type:'removeMarker',index,marker})
		
        
	} 
    
    createAreaPlane(mat){ 
        var geometry = new THREE.Geometry();
        var mesh = new THREE.Mesh(geometry, mat)
        
        return mesh
    }
    
    updateAreaPlane(){
        this.areaPlane.geometry.dispose()
         
        
        if(this.points.length>2){
            if(this.point2dInfo){
                this.areaPlane.geometry = MeshDraw.getShapeGeo(this.point2dInfo.points2d)
                let center = math.getCenterOfGravityPoint(this.point2dInfo.points2d) //重心 
                      
                let firstPos =  this.point2dInfo.points2d[0].clone()
                firstPos.z = 0                  //因为shape只读取了xy,所以位移下, 再算出最终位置，得到差距
                firstPos.applyQuaternion(this.point2dInfo.quaInverse)
                let vec = this.point2dInfo.originPoint0.clone().sub(firstPos)
                center = new THREE.Vector3(center.x, center.y, 0)
                center.applyQuaternion(this.point2dInfo.quaInverse)
                this.areaPlane.quaternion.copy(this.point2dInfo.quaInverse) 
                this.areaPlane.position.copy(vec)       
                center.add(vec)
                this.center = center 
            }else{//prism 
            
                let z = this.horizonZ || 0
                let points2d = this.points.map(e=>e.clone().setZ(z))
                this.areaPlane.geometry = MeshDraw.getShapeGeo(points2d) //z=0
                let center = math.getCenterOfGravityPoint(points2d) //重心 
                this.areaPlaneCenter = new THREE.Vector3(center.x, center.y, z)
                this.areaPlane.position.z = z
                
            }
        }else{
            this.areaPlane.geometry = new THREE.Geometry()
            
        } 
             
   
        
    }


    
    
    getIndex(index, add){
        let lastIndex = this.points.length - 1
        if(add == -1) return (index === 0) ? lastIndex : index - 1;
        else if(add == 1)  return (index + 1 > lastIndex) ? 0 : index + 1; 
    }
     

    update(options={}){
        if(this.points.length === 0){
			return;
		} 
        //performance.mark('measureUpdate-start')
        
        let lastIndex = this.points.length - 1
        
        
        if(options.index != void 0){//更新第几个点 
            this.updateMarker(this.markers[options.index], this.points[options.index])
            let previousIndex = this.getIndex(options.index, -1)
            let nextIndex = this.getIndex(options.index, +1) 
            if( this.closed || nextIndex != 0  ) LineDraw.updateLine( this.edges[options.index], [this.points[options.index], this.points[nextIndex]]) 
            if( this.closed || previousIndex != lastIndex  ) LineDraw.updateLine( this.edges[previousIndex], [this.points[options.index], this.points[previousIndex]]) 
     
        }else{
            
            for (let index = 0; index <= lastIndex; index++) {
                
                let nextIndex = this.getIndex(index, +1) 
                let previousIndex = this.getIndex(index, -1)
     
                let point = this.points[index];
                let nextPoint = this.points[nextIndex];
                let previousPoint = this.points[previousIndex];

                if(options.ifUpdateMarkers){
                    this.updateMarker(this.markers[index], point)
                }   
                
                
                if(!this.closed && nextIndex == 0  )break; //add
                { 
                    let edge = this.edges[index]; 
                    if(edge){
                        LineDraw.updateLine(edge, [point, nextPoint]) 
                    } 
                }  
            }
        }
        
        
        
        
        if(this.areaPlane){
            this.updateAreaPlane()  
        }
        
        //this.dispatchEvent({type:'update'})  
        viewer.dispatchEvent('content_changed')
        viewer.mapViewer && viewer.mapViewer.dispatchEvent('content_changed') //暂时先这么都通知
        
        
        
        //performance.mark('measureUpdate-end')
        //let measure = performance.measure('measure-','measureUpdate-start', 'measureUpdate-end' );
        //console.log('update-time', measure.duration)
        
    } 
    
    
    
    createPrismLines(color){
        this.lineMesh = LineDraw.createLine([],{color})
        this.lineMesh.name = 'PrismLines' 
        this.add(this.lineMesh)  
    }
    
    updatePrismLines(){
        if(!this.lineMesh)return
        let positions = [];
        let length = this.points.length
        this.points.forEach((point, index)=>{
            
            //竖线：
            positions.push(point.clone().setZ(this.zMin), point.clone().setZ(this.zMax))
            
            //横线
            let nextPoint = this.points[(index+1)%length]; 
            if(!nextPoint)return;//when length==1
            
            positions.push(point.clone().setZ(this.zMax), nextPoint.clone().setZ(this.zMax))//上横线
            positions.push(point.clone().setZ(this.zMin), nextPoint.clone().setZ(this.zMin))//下横线
        }) 
        
        LineDraw.moveLine(this.lineMesh,positions)
        viewer.dispatchEvent('content_changed')
    }
    
    
    
    
    
    
    
    
    
    dispose(){//add 
        this.parent.remove(this)
        this.markers.concat(this.edges).forEach(e=>e.dispatchEvent({type:'dispose'})) 
    }
    
    
    reDraw(restMarkerCount=0){//重新开始画
        let pointCount = this.points.length - restMarkerCount // restMarkerCount为需要留下的marker数量
        while(pointCount > 0){
            this.removeMarker(--pointCount)
        }
        this.point2dInfo = null
        this.facePlane = null   
         
        
                    
    }
    
    
    setMarkerSelected(){}
    editStateChange(state){
        if(!state){
            viewer.dispatchEvent({
                type : "CursorChange", action : "remove",  name:"polygon_isIntersectSelf"
            })
            viewer.dispatchEvent({
                type : "CursorChange", action : "remove",  name:"polygon_AtWrongPlace"
            })
            viewer.dispatchEvent({type:'reticule_forbit', v:false})
            
            this.markers.forEach(e=>e.isDragging = false ) 
        }
    }
    
    transformData(prop){
         
        const pick = (defaul, alternative) => {
			if(defaul != null){
				return defaul;
			}else{
				return alternative;
			}
		};

		prop.showDistances = (prop.showDistances === null) ? true : prop.showDistances; 
		prop.showArea = pick(prop.showArea, false);
		prop.showAngles = pick(prop.showAngles, false);
		prop.showCoordinates = pick(prop.showCoordinates, false);
		prop.showHeight = pick(prop.showHeight, false);
		prop.showCircle = pick(prop.showCircle, false);
		prop.showAzimuth = pick(prop.showAzimuth, false);
		prop.showEdges = pick(prop.showEdges, true);
		prop.closed = pick(prop.closed, false);
		prop.maxMarkers = pick(prop.maxMarkers, Infinity);
        prop.direction = prop.direction//add
		prop.type = prop.type    
        prop.showGuideLine = pick(prop.showGuideLine, false);  
        prop.isRect = pick(prop.isRect, false);

    }
    setSelected(){}
    
    
    
    continueDrag(marker, e){
        let object = marker || e.drag.object
        object.isDragging = true 
        this.editStateChange(true)
        var timer = setTimeout(()=>{//等 drag=null之后 //右键拖拽结束后需要重新得到drag 
            if(this.parent && object.parent && object.isDragging){
                //console.log('continueDrag')        
                viewer.inputHandler.startDragging( object ,
                    {endDragFun: e.drag.endDragFun, notPressMouse:e.drag.notPressMouse, dragViewport:e.drag.dragViewport} 
                )
            } 
        },1)
        return timer
    }
 
    
}



function getDifferentPoint(points, count){//for facePlane
    var result = [];
    for(let i=0;i<points.length;i++){
        var p = points[i];
        if(result.find(e=>e.equals(p)))continue;
        else result.push(p)
        if(result.length == count)break
    }
    if(result.length == count)return result
}