/**
 * @author mschuetz / http://mschuetz.at
 *
 *
 */

import * as THREE from "../../libs/three.js/build/three.module.js";
import {KeyCodes} from "../KeyCodes.js";
import {Utils} from "../utils.js"; 
import Common from "../custom/utils/Common.js";
import DepthBasicMaterial from '../custom/materials/DepthBasicMaterial.js'
 

let {Buttons} = Potree.defines

export class InputHandler extends THREE.EventDispatcher {
	constructor (viewer,scene) {
		super();

		this.viewer = viewer; 
		this.renderer = viewer.renderer;
		this.domElement = this.renderer.domElement;
		this.enabled = true;
		
		this.scene = scene;
		this.interactiveScenes = [];
		this.interactiveObjects = new Set();
		this.inputListeners = [];
		this.blacklist = new Set();

		this.drag = null;
		this.mouse = new THREE.Vector2(0, 0);
        //add:
        this.pointer = new THREE.Vector2(0, 0); //交互点的屏幕坐标，有别于DOM坐标，在此存放NDC坐标。（NDC，三维常用坐标系，二维坐标，整个屏幕映射范围（-1,1），屏幕中心为原点，+Y朝上，+X朝右）
		this.mouseDownMouse = new THREE.Vector2(0, 0);
        
        this.selection = [];

		this.hoveredElements = [];
		this.pressedKeys = {};
        
		this.wheelDelta = 0;

		this.speed = 1;

		this.logMessages = false;

		if (this.domElement.tabIndex === -1) {
			this.domElement.tabIndex = 2222;
		}
        
        this.lastPointerUpTime = 0
        
        this.touches = []
        this.interactHistory = {move:0} //add

        this.hoverViewport = viewer.viewports[0]
        
        
        
		this.domElement.addEventListener('contextmenu', (event) => { event.preventDefault(); }, false);
		this.domElement.addEventListener('click', this.onMouseClick.bind(this), false);
		this.domElement.addEventListener('mousedown', this.onMouseDown.bind(this), false);
		window.addEventListener('mouseup', this.onMouseUp.bind(this), false);
        if(Potree.isIframeChild){//子页面的话在父页面也要加侦听（应该不会有多层吧？否则要一直加到最外层）
            //window.parent.addEventListener('mouseup', this.onMouseUp.bind(this), false); //可能跨域
            //window.parent.postMessage('listenMouseup', '*');
            window.addEventListener('mouseout', this.onMouseUp.bind(this), false);  //cancel drag
        } 
        
        
		this.domElement.addEventListener('mousemove', this.onMouseMove.bind(this), false);
        //add
       /*  this.domElement.addEventListener("pointerout", this.onMouseUp.bind(this)),
        this.domElement.addEventListener("pointercancel", this.onMouseUp.bind(this)),
        
         */
        
		this.domElement.addEventListener('mousewheel', this.onMouseWheel.bind(this), false);
		this.domElement.addEventListener('DOMMouseScroll', this.onMouseWheel.bind(this), false); // Firefox
        
		//this.domElement.addEventListener('dblclick', this.onDoubleClick.bind(this));  //因为双击时间间隔是跟随系统的所以不好判断
		
        this.domElement.addEventListener('keydown', this.onKeyDown.bind(this));
		window.addEventListener('keyup', this.onKeyUp.bind(this));
         
        
        window.addEventListener('blur',this.onKeyUp.bind(this)); //add
            
              
         
		this.domElement.addEventListener('touchstart', this.onTouchStart.bind(this));
		this.domElement.addEventListener('touchend', this.onTouchEnd.bind(this));
		this.domElement.addEventListener('touchmove', this.onTouchMove.bind(this));
          
          
        {
            this.addEventListener('isMeasuring',(e)=>{ 
                //console.log('isMeasuring',e.v,e.cause)
                this.isMeasuring = e.v 
            }) 
        }
        
        window.viewer.addEventListener('loopStart',()=>{
            this.interactHistory = {}  //清空
        })
        
           
	}  
     
	/* addInputListener (listener) {
		this.inputListeners.push(listener);
	}

	removeInputListener (listener) {
		this.inputListeners = this.inputListeners.filter(e => e !== listener);
	}

	getSortedListeners(){
		return this.inputListeners.sort( (a, b) => {
			let ia = (a.importance !== undefined) ? a.importance : 0;
			let ib = (b.importance !== undefined) ? b.importance : 0;

			return ib - ia;
		});
	} */
    //统一跟第一个触碰的viewport相同
    updateTouchesInfo(e){
        var viewport, pointer, camera  
        let oldTouches = this.touches
        let changedTouches = Array.from(e.changedTouches)
        let touches = Array.from(e.touches)

        this.touches = touches.map(touch=>{
            let touch_ = oldTouches.find(a=>a.touch.identifier == touch.identifier)
            let pointer = touch_ && touch_.pointer  //复制原先的值
            return { 
                touch,   pointer, 
            }
        }) 
        if(e.touches.length > 0){ 
            
            let newTouches = touches.filter(e=>!
                oldTouches.some(a=>a.touch.identifier == e.identifier) && !changedTouches.some(a=>a.identifier == e.identifier)  
            ) //从按钮处划过时e.touches中会出现this.touches和changedTouches中都没有的identifier
            if(newTouches.length>0){
                console.warn('has new',newTouches.map(e=>e.identifier))
            }
            
            newTouches.concat(changedTouches).forEach(touch=>{   //修改changedTouches的 
                let touch_ = this.touches.find(a=>a.touch.identifier == touch.identifier)
                if(touch_){
                    let a = this.getPointerInViewport(touch.pageX, touch.pageY, this.dragViewport||viewport, new THREE.Vector2) 
                    touch_.pointer = a.pointer.clone() 
                    viewport = a.viewport;  camera = a.camera
                } 
            })
            
            
            
            //使用当前touches的平均
            if(e.touches.length > 1){
                let pageX = Common.average(e.touches, "pageX")
                let pageY = Common.average(e.touches, "pageY")
                let a = this.getPointerInViewport(pageX, pageY, viewport, new THREE.Vector2) 
                this.pointer.copy(a.pointer)
                //console.log('updateTouchesInfo', this.pointer.clone())
                
            }else{
                this.pointer = this.touches[0].pointer.clone() //更新，使用当前touches中的第一个 
            }
                
            
            /* if(this.touches.find(e=>!e.pointer)){
                console.error('  touches has no pointer', oldTouches.map(e=>e.touch.identifier),
                Array.from(e.touches).map(e=>e.identifier),  Array.from(e.changedTouches).map(e=>e.identifier) ) 
            } */ 
            //console.log(this.touches)
            
            //console.log('更新pointer1',this.pointer.toArray())
            return  {viewport,  camera/* , pointer:this.pointer  */}
        }


        
        
    }
    
	onTouchStart (e) {
		if (this.logMessages) console.log(this.constructor.name + ': onTouchStart');

		e.preventDefault(); 
       
		/* if (e.touches.length === 1 || !this.drag) { //!this.drag代表一次性下了两个指头
			let rect = this.domElement.getBoundingClientRect();
			let x = e.touches[0].pageX 
			let y = e.touches[0].pageY   
            this.dealPointerDown(x,y,e,true) 
		}else{ 
            this.updateTouchesInfo(e)
            this.drag.end.copy(this.pointer)
        }  */
        
        
        this.dealPointerDown(e,true) 
        
		
		this.viewer.dispatchEvent($.extend(  
            this.getEventDesc(e,true),
            {
                type: 'global_' + e.type,
                changedTouches: e.changedTouches                
            }
        )); 
	
        /* console.log('targetTouches :', Array.from(e.targetTouches).map(e=>'| identifier: '+ e.identifier), 
            'changedTouches :', Array.from(e.changedTouches).map(e=>'| identifier: '+ e.identifier)
        ) */
        //console.log('')
	}
    
    
    
    
	onTouchMove (e) {
		if (this.logMessages) console.log(this.constructor.name + ': onTouchMove');

		e.preventDefault();
        
		/* if (e.touches.length === 1) {
			let rect = this.domElement.getBoundingClientRect();
			let x = e.touches[0].pageX;
			let y = e.touches[0].pageY;
 
            
            
		}else{ 
            this.updateTouchesInfo(e)
            this.drag.pointerDelta.subVectors(this.pointer,  this.drag.end)
            this.drag.end.copy(this.pointer)
        }
         */
        
        this.dealPointerMove(e, true) 
        
        
        
        
		this.viewer.dispatchEvent($.extend(  
            this.getEventDesc(e,true),
            {
                type: 'global_' + e.type,
                changedTouches: e.changedTouches                
            }
        )); 
         
         
        /* console.log('targetTouches :', Array.from(e.targetTouches).map(e=>'| identifier: '+ e.identifier), 
            'changedTouches :', Array.from(e.changedTouches).map(e=>'| identifier: '+ e.identifier)
        ) */
	}
    
    

	onTouchEnd (e) {
		if (this.logMessages) console.log(this.constructor.name + ': onTouchEnd');

		e.preventDefault();
        //console.log('onTouchEnd')
		this.updateTouchesInfo(e) 


        
        /* if (e.touches.length === 0) {
			let rect = this.domElement.getBoundingClientRect();
			let x = e.changedTouches[0].pageX   //万一一次松开两个指头的怎么办
			let y = e.changedTouches[0].pageY  
			
            this.dealPointerUp(x,y,e,true)
             
		}else { 
            this.drag.end.copy(this.pointer) 
        }  */ 
        this.dealPointerUp(e,true)
        
        
        
        this.viewer.dispatchEvent($.extend(  
            this.getEventDesc(e,true),
            {
                type: 'global_' + e.type, 
            }
        ));  
        //console.log('touchend length '+e.touches.length, this.touches.length)
	}


    







	onKeyDown (e) {
		if (this.logMessages) console.log(this.constructor.name + ': onKeyDown');

		// DELETE
		/* if (e.keyCode === KeyCodes.DELETE && this.selection.length > 0) {
			this.dispatchEvent({ 
				type: 'delete',
				selection: this.selection
			});

			this.deselectAll();
		} */

		this.dispatchEvent({
			type: 'keydown',
			keyCode: e.keyCode,
			event: e                                            
		});

		// for(let l of this.getSortedListeners()){
		//	l.dispatchEvent({
		//		type: "keydown",
		//		keyCode: e.keyCode,
		//		event: e
		//	});
		// }

		this.pressedKeys[e.keyCode] = true;

		// e.preventDefault();
	}

	onKeyUp (e) {
		if (this.logMessages) console.log(this.constructor.name + ': onKeyUp');
           
        if(e.keyCode != void 0){
            delete this.pressedKeys[e.keyCode];
        }else{
            this.pressedKeys = {}
        }
           
		

		e.preventDefault();
	}
 
	onDoubleClick (e) {
		if (this.logMessages) console.log(this.constructor.name + ': onDoubleClick');

		let consumed = false;
		for (let hovered of this.hoveredElements) {
			if (hovered._listeners && hovered._listeners['dblclick']) {
				hovered.object.dispatchEvent({
					type: 'dblclick',
					mouse: this.mouse,
					object: hovered.object
				});
				consumed = true;
				break;
			}
		}

		if (!consumed) {
			/* for (let inputListener of this.getSortedListeners()) {
				inputListener. */this.viewer.dispatchEvent({
					type: 'global_dblclick',
					mouse: this.mouse,
					object: null
				});
			//}
		}
        this.needSingleClick = false//add
		e.preventDefault();
	}

	onMouseClick (e) {
		if (this.logMessages) console.log(this.constructor.name + ': onMouseClick');

		e.preventDefault();
	}




    dealPointerDown(e,isTouch){
        e.preventDefault(); 
         
        //重新获取一下pointer, 因点击了浏览器的按钮展开列表时 move回来不会触发onmousemove，所以pointer是旧的
        
        if(isTouch){
            var  {  camera, viewport  } = this.updateTouchesInfo(e) 
            if(this.drag){
                //因为触屏在按下前缺少pointermove所以要更新下
                this.drag.end = this.pointer.clone()
            }
             
             
        }else{
            
            var  {  camera, viewport  } = this.getPointerInViewport(e.clientX, e.clientY ) 
        }
        
        
		this.dragViewport = this.hoverViewport = viewport
      
        
        //if(isTouch || !Potree.settings.intersectWhenHover ){ 
        if(isTouch || !this.dragViewport.view.isFlying() &&  Potree.settings.intersectWhenHover && Potree.settings.editType != 'pano'  ){//漫游点编辑如果拖拽前getIntersect旋转会延迟
            //isTouch必须更新 否则是旧的 
            this.hoveredElements = this.getHoveredElements();
            let dontIntersect = false
            this.intersect = this.getIntersect(viewport,null,null,dontIntersect) //更新intersect，避免在没有mousemove但flyToPano后intersect未更新。
            //this.intersect = this.getWholeIntersect()  
        }
        if(!viewport)return //why add this?
        if (!this.drag) {
            let target = (isTouch||e.button == THREE.MOUSE.LEFT) && this.hoveredElements.find(el => (//只有左键能拖拽
                    el.object._listeners &&
                    el.object._listeners['drag'] &&
                    el.object._listeners['drag'].length > 0));

            if (target) {
                this.startDragging(target.object, {location: target.point});
            } else {
                this.startDragging(null);
            }
        }
        this.drag.intersectStart = this.intersect;
        
        
        
    
		if(!isTouch || e.touches.length == 1){ 
       
            let consumed = false;
            let consume = () => { return consumed = true; };
            //if (this.hoveredElements.length === 0) {
            this.viewer.dispatchEvent($.extend(  
                this.getEventDesc(e,isTouch),
                    {
                        type: 'global_mousedown' 
                    } 
            ));
            
         
            for(let hovered of this.hoveredElements){
                let object = hovered.object;
                object.dispatchEvent({
                    type: 'mousedown',
                    viewer: this.viewer,
                    consume: consume
                });

                if(consumed){
                    break;
                }
            } 
        }
        
        
        
         
       
        this.mouseDownMouse = this.mouse.clone()
        
        this.pointerDownTime = Date.now()
    }



	onMouseDown (e) {
         
		if (this.logMessages) console.log(this.constructor.name + ': onMouseDown');
        this.dealPointerDown(e)
		 
	}

    /* getWholeIntersect(hoveredElements, intersectPoint){//add
        hoveredElements = hoveredElements || this.hoveredElements
        intersectPoint = intersectPoint || this.intersectPoint  
        if(Potree.settings.intersectOnObjs && hoveredElements[0] && hoveredElements[0].object.isModel){
            return {//模拟点云的intersectPoint的结构写法
                hoveredElement : hoveredElements[0] ,
                location: hoveredElements[0].point,
                point: {normal: hoveredElements[0].face.normal },
                distance: hoveredElements[0].distance,
                object: hoveredElements[0].object
            } 
        }else return intersectPoint  
    } */


    getEventDesc(e,isTouch){//搜集dispatchEvent要给的一般数据 
        let o = {
            viewer: this.viewer,
            mouse: this.mouse, 
            pointer:this.pointer,
            drag :this.drag,  
            isTouch,
            dragViewport : this.dragViewport,
            hoverViewport: this.hoverViewport,
           // button: isTouch ? 0 : e.button,
            //intersectPoint:this.intersectPoint,
            hoveredElement: this.hoveredElements[0],
            intersect: this.intersect//this.getWholeIntersect() , //可能包含mesh上的，针对融合页面
        }
         
        
        
        if(e){
            o.isAtDomElement = e.target == this.domElement 
        } 
        if(isTouch){
            o.touches = this.touches 
        }else if(e){
            o.button = e.button 
            o.buttons = e.buttons
        }
        return o;
    }



    dealPointerUp(e,isTouch){
         
        if(!this.drag){// 在canvas外mousedown
            return 
        }
        
        this.drag.end.copy(this.pointer) 
        
        if(isTouch && e.touches.length >= 1){ 
            return
        }
        let now = Date.now()
        
        
		if (this.logMessages) console.log(this.constructor.name + ': onMouseUp');

		e.preventDefault();
        
        let pressDistance = this.mouseDownMouse.distanceTo(this.mouse);
        let pressTime = now - this.pointerDownTime;
        
		let noMovement = this.drag.pointerDelta.length() == 0//this.getNormalizedDrag().length() === 0;
        
		let consumed = false;
		let consume = () => { return consumed = true; };
		//if (this.hoveredElements.length === 0) {
			/* for (let inputListener of this.getSortedListeners()) {
				inputListener */this.viewer.dispatchEvent($.extend(  
					this.getEventDesc(e,isTouch),
                    {
                        type: 'global_mouseup',
                        pressDistance,
                        consume,
                    }
                ));

				/* if(consumed){//??
					break;
				} */
			//}
		//}
        if (this.hoveredElements.length > 0) {        
			let hovered = this.hoveredElements
				.map(e => e.object)
				.find(e => (e._listeners && e._listeners['mouseup']));
			if(hovered){
				hovered.dispatchEvent({
					type: 'mouseup',
					viewer: this.viewer,
					consume: consume
				});
			} 
        }
        
        
        
		if (this.drag) { 
            //拖拽结束   

			if (this.drag.object/*  && e.button == THREE.MOUSE.LEFT */) {//add LEFT
				if (this.logMessages) console.log(`${this.constructor.name}: drop ${this.drag.object.name}`);
				 
                this.drag.object.dispatchEvent($.extend(  
					this.getEventDesc(e,isTouch),
                    {
                        type: 'drop',
                        pressDistance, 
                    }
                ));
                
                
			} else {
				this.viewer.dispatchEvent($.extend(  
					this.getEventDesc(e,isTouch),
                    {
                        type: 'global_drop', 
                        pressDistance
                    }
                ));
                  
                
			} 
            
            // check for a click  
            
            if(pressDistance < Potree.config.clickMaxDragDis && pressTime<Potree.config.clickMaxPressTime && !e.unableClick){
                let clickElement, consumed = false;
                if(this.hoveredElements){
                    clickElement = this.hoveredElements.find(e=>e.object._listeners['click']) 
                    if(clickElement){
                        //console.log('clickElement',clickElement)
                        if (this.logMessages) console.log(`${this.constructor.name}: click ${clickElement.name}`);
                        clickElement.object.dispatchEvent($.extend(  
                            this.getEventDesc(e,isTouch),
                            {
                                type: 'click',
                                pressDistance     
                            }
                        )); 
                    } 
                }
                
                
                let selectable
                if(/* !consumed && */ !this.fixSelection){
                    if (e.button === THREE.MOUSE.LEFT) {
                        if (noMovement) {
                            selectable = this.hoveredElements.find(el => el.object._listeners && el.object._listeners['select']);

                            if (selectable) {
                                selectable = selectable.object;
  
                                if (this.isSelected(selectable)) {
                                    this.deselectAll();
                                } else {
                                    this.deselectAll();
                                    this.toggleSelection(selectable);
                                } 
                                consumed = true //add
                            } else {
                                if(this.selection.length>0)consumed = true //add 取消选择后，阻断后续 
                                this.deselectAll();
                            }
                        }
                    } else if ((e.button === THREE.MOUSE.RIGHT) && noMovement) {
                        this.deselectAll();
                    }
                }
                 
                 
                let consume = () => { return consumed = true; };
                let desc = this.getEventDesc(e,isTouch)
                 
                if(!consumed){ 
                    
                    this.viewer.dispatchEvent($.extend(  
                        desc,
                        {
                            type: 'global_click',  
                            pressDistance,
                            clickElement:clickElement/*  || selectable */,
                            consume
                        }
                    )); 
                }
                
                
                
                //增加 单击：
                this.needSingleClick = true;
              
                
                consumed || setTimeout(()=>{
                    if(this.needSingleClick){
                        this.viewer.dispatchEvent($.extend(  
                            desc,
                            {
                                type: 'global_single_click',  
                                pressDistance,
                                clickElement
                            }
                        ));
                    }
                }, Potree.config.doubleClickTime+1)
                
                //自行执行双击：
                
                if(now - this.lastClickTime < Potree.config.doubleClickTime){
                    this.onDoubleClick(e)
                }
                
                this.lastClickTime = now
            }
        
            this.drag = null; 
		}

        this.dragViewport = null

        
        
    }
    
	onMouseUp (e) {
        this.dealPointerUp( e )
	}



    getPointerInViewport(clientX, clientY, viewForceAt, pointer ){
        let rect = this.domElement.getBoundingClientRect();
        let x = clientX - rect.left;
        let y = clientY - rect.top;
        let camera 
        let viewport 
        pointer = pointer ||this.pointer
        //if(this.viewer.viewports || viewForceAt){
            var getDimension = (view)=>{
                var left = Math.ceil(this.domElement.clientWidth * view.left)
                 , bottom = Math.ceil(this.domElement.clientHeight * view.bottom)
                 , width = Math.ceil(this.domElement.clientWidth * view.width)
                 , height = Math.ceil(this.domElement.clientHeight * view.height)
                 ,   top = this.domElement.clientHeight - bottom - height
                return {left, bottom, width, height, top}
            }
            var getView = (view, left, bottom, width, height, top)=>{
                this.mouse.set(x-left, y - top )
                Utils.convertScreenPositionToNDC(pointer, this.mouse, width, height);
                //console.log('更新pointer2',this.pointer.toArray())
                camera = view.camera;
                viewport = view 
            }
            
            if(viewForceAt){
                let {left, bottom, width, height, top} = getDimension(viewForceAt)
                getView(viewForceAt, left, bottom, width, height, top)
                
                
            }else{
                var length = this.viewer.viewports.length;
                //var getif = false
                for(var i=0;i<length;i++){
                    var view = this.viewer.viewports[i];
                    if(!view.active)continue
                    var {left, bottom, width, height, top} = getDimension(view)
                    
                     
                    if(x >= left && x <= left + width &&  y >= top && y <= top + height){ 
                        getView(view, left, bottom, width, height, top)   
                        
                        //getif = true 
                        break;
                    } 
                    
                }
                  
                
            }  
       
        return { 
            camera, viewport, pointer 
        }
    }


    ifBlockedByIntersect({pos3d, margin=0, cameraPos, pickWindowSize, pano, useDepthTex}={}){//某点是否被遮挡(不允许camera修改位置, 因为depthTex不好置换)
          
        let intersect = this.getIntersect(this.hoverViewport, true, pickWindowSize, null, null, useDepthTex, {pos3d, cameraPos, pano})
        let cameraPos_ = (!cameraPos && pano) ? pano.position : (cameraPos||this.hoverViewport.view.position)
        if(intersect && intersect.distance+margin <= pos3d.distanceTo(cameraPos_)){
            return intersect //被遮挡
        }
        //点云模式，对没加载出的点云不准确。 尤其是需要修改相机位置时，因临时修改并不能使点云加载。
    }



    getIntersect(viewport,   onlyGetIntersect, pickWindowSize, dontIntersect, usePointcloud, useDepthTex, prop={}){// usePointcloud:必须使用点云
        let intersectPoint  
        let camera = viewport.camera
        let raycaster 
        
        viewer.addTimeMark('getIntersect','start')

        let getByDepthTex = ()=>{ 
            let intersect
            if(prop.pos3d){
                let cameraPos = prop.pano ? prop.pano.position : camera.position
                let dir = new THREE.Vector3().subVectors(prop.pos3d, cameraPos).normalize(); 
                intersect = {dir} 
            }else{
                intersect = Utils.getIntersect(camera, [viewer.images360.cube], this.pointer, raycaster) 
            } 
            intersectPoint = viewer.images360.depthSampler.sample(intersect, prop.pano, !!prop.pos3d)  //可能不准确， 因pano可能未加载depthTex
            if(intersectPoint && Potree.settings.depTexLocBindDataset){
                intersectPoint.pointcloud = (prop.pano || viewer.images360.currentPano).pointcloud
                //在全景模式下，虽然深度图上的点可能对应别的pointcloud，但因为是在当前全景图处得到的，所以即使将原本对应的点云移走，该点也不移动是有道理的。它可以永远跟着该全景图。
            }
        }
        
        let getByCloud = ()=>{
            if(prop.pos3d){//指定了目标点，而非只是用pointer所在位置
                prop.cameraPos && camera.position.copy(prop.cameraPos)
                camera.lookAt(prop.pos3d)
                camera.updateMatrixWorld()
                prop.pointer = this.pointer.clone()
                prop.mouse = this.mouse.clone()
                this.pointer.set(0,0)   //画布中心
                this.mouse.set(Math.round(viewport.resolution.x/2), Math.round(viewport.resolution.y/2))
            } 
                
            intersectPoint = (viewport.noPointcloud || dontIntersect)? null : Utils.getMousePointCloudIntersection(
                viewport,
                this.mouse,
                this.pointer, 
                camera, 
                this.viewer, 
                this.viewer.scene.pointclouds,
                {pickClipped: true, isMeasuring: this.isMeasuring, pickWindowSize, cameraChanged: !!prop.pos3d }  
                
            );
            //恢复
            if(prop.pos3d){
                viewport.view.applyToCamera(camera)
                this.pointer.copy(prop.pointer)
                this.mouse.copy(prop.mouse)
            }  
        }
        
        
        
        let canUseDepthTex = (Potree.settings.displayMode == 'showPanos' || useDepthTex)
            && viewer.images360.currentPano.pointcloud.hasDepthTex && viewport == viewer.mainViewport && !usePointcloud 
        
        
        if(canUseDepthTex)getByDepthTex()
        else getByCloud() 
        /* if(canUseDepthTex && !this.isMeasuring){
            getByDepthTex()
        }else{
            getByCloud() 
            if(!intersectPoint && canUseDepthTex  ){  //若在测量，先尝试点云，再用全景 //后来发现有深度图的点云全景visibleNode为空，pick不到的
                getByDepthTex()
            }
        }  */ 
        
        
                   

         
        //console.log(viewport.name , intersectPoint &&  intersectPoint.location )
        let intersect
        let intersectOnModel, allElements
       
        
        if(Potree.settings.intersectOnObjs && !dontIntersect){
            if(prop.point){
                raycaster = new THREE.Raycaster() 
                var dir = new THREE.Vector3().subVectors(prop.point, camera.position).normalize()
                raycaster.set(camera.position, dir) //var origin = new THREE.Vector3(pointer.x, pointer.y, -1).unproject(camera),
            }  
            
            
            allElements = this.getHoveredElements(viewer.objs.children, true, raycaster)
            
            
            if(allElements[0]){
                intersectOnModel = {//模拟点云的intersectPoint的结构写法
                    hoveredElement : allElements[0] ,
                    location: allElements[0].point,
                    //point: {normal: allElements[0].face.normal },
                    normal: allElements[0].face && allElements[0].face.normal,
                    distance: allElements[0].distance,
                    object: allElements[0].object
                } 
            }
            
             
        }
        
        if(intersectPoint && intersectOnModel){
            if(intersectPoint.distance < intersectOnModel.distance){
                intersect = intersectPoint
            }else{
                intersect = intersectOnModel
            } 
        }else{
            intersect = intersectOnModel || intersectPoint
        }                
          
        
        if(viewport.camera.type == 'OrthographicCamera'/*  == 'mapViewport' */){ 
            let pos3d = new THREE.Vector3(this.pointer.x,this.pointer.y,-1).unproject(viewport.camera); //z:-1朝外   
             
            if(!intersect){
                intersect = {}
            }   
            intersect.orthoIntersect = pos3d.clone() 
        } 
         
        //记录全部hover到的：
        if(intersect){
            intersect.allElements = allElements
            intersect.pointclouds = intersectPoint ? intersectPoint.pointclouds : []
        }
        
        
        
        viewer.addTimeMark('getIntersect','end')
        //点云费时：2-15ms
        //深度图费时: 0.1-0.2ms

       /*  
        intersect && intersect.location && intersect.location.applyMatrix4(viewer.scene.scene.matrix)//add
         */
        
        
        
        if(onlyGetIntersect){ 
            return intersect
        }
        
        if (intersect) {  
            if(viewer.showCoordType){ //显示坐标位置时
                let pos = intersect.point.position.toArray()
                if(viewer.showCoordType == "local"){
                     
                }else if(viewer.showCoordType == "lonlat"){
                    pos = viewer.transform.lonlatToLocal.inverse(pos)
                }else{
                    pos = viewer.transform.lonlatToLocal.inverse(pos)
                    pos = viewer.transform.lonlatTo4550.forward(pos) 
                }
                 
                viewer.dispatchEvent({
                    type : "coordinateChange", pos
                })
            }  
        }
        //console.log('getIntersect', !!intersectPoint)  
        
        this.intersect = intersect 
         
        intersect && (this.hoverViewport.lastIntersect = intersect)
         
        return intersect         
    }
    
    
    
    
    
    onMouseMove (e) {  
        return this.dealPointerMove( e )
    }

    dealPointerMove(e, isTouch){ 
    
        if(this.interactHistory.move) return  //一帧只触发一次
        this.interactHistory.move = 1
         
        if(isTouch){
            var  {  camera, viewport  } = this.updateTouchesInfo(e) 
        }else { 
            var  {  camera, viewport  } = this.getPointerInViewport(e.clientX, e.clientY,  this.dragViewport) 
        }
          
		this.hoverViewport = viewport
        if(!viewport)return//刚变化viewport时会找不到
         
		let isFlying = this.viewer.viewports.some(e=>e.view.isFlying()) || viewer.scene.cameraAnimations.some(c=>c.onUpdate)
        let intersect 
        
        
        if(e.onlyGetIntersect ||  (!this.drag || this.drag.object || viewport.alignment ) ){ //没有拖拽物体，但按下鼠标了的话，不intersect。触屏的就能直接避免intersect
        
            let dontIntersect =  this.drag && viewport.alignment || isFlying || !Potree.settings.intersectWhenHover // flying 时可能卡顿
            //console.log('dontIntersectPointcloud',dontIntersectPointcloud)
            
            /* if(e.onlyGetIntersect )   */intersect = this.getIntersect(viewport,  e.onlyGetIntersect, e.pickWindowSize, !!dontIntersect, e.whichPointcloud) //数据集多的时候卡顿
            /* else  Potree.Common.intervalTool.isWaiting('getIntersect', ()=>{  
                 this.intersect = this.getIntersect(viewport,  e.onlyGetIntersect, e.pickWindowSize, !!dontIntersect, e.whichPointcloud) //数据集多的时候卡顿
            }, 156); */
	                 
            //console.log('intersect', intersect)
        } 
        
        if(e.onlyGetIntersect){ 
            /* if(Potree.settings.intersectOnObjs){
                let hoveredElements = this.getHoveredElements() //应该不用发送mouseover事件吧
                let intersect = this.getWholeIntersect(hoveredElements, intersectPoint)
                return intersect
            } 
            return intersectPoint */
            return intersect
        }
        e.preventDefault();
      
            
        
        if (this.drag) {//有拖拽（不一定拖拽了物体, 也不一定按下了鼠标）
            this.drag.mouse = isTouch ? 1 : e.buttons; 
            //add:
            //this.drag.pointer = this.pointer.clone();
            //this.drag.hoverViewport = this.hoverViewport
            this.drag.pointerDelta.subVectors(this.pointer,  this.drag.end)
            this.drag.end.copy(this.pointer)
            
            
            if (this.drag.object && (e.buttons == Buttons.NONE || !this.drag.notPressMouse )){//如果是本不需要按鼠标的拖拽，但按下了鼠标，就不执行这段（改为拖拽场景，如添加测量时突然拖拽画面）
                if (this.logMessages) console.log(this.constructor.name + ': drag: ' + this.drag.object.name);
                
                this.drag.object.dispatchEvent($.extend(  
                    this.getEventDesc(e,isTouch),
                    {
                        type: 'drag',  //拖拽物体
                    }
                ))
                viewer.dispatchEvent('content_changed') 
                
            } else {
                 
                if (this.logMessages) console.log(this.constructor.name + ': drag: ');

                let dragConsumed = false; 
                this.viewer.dispatchEvent($.extend(  
                    this.getEventDesc(e,isTouch),   
                    {
                        type: 'global_drag',        //拖拽画面
                        consume: () => {dragConsumed = true;}
                    }
                ))
                 
                
            }
        } 
        
        
        
        if(!isTouch || e.touches.length == 1){ 
        
            if((!this.drag || this.drag.notPressMouse || Potree.settings.intersectOnObjs && this.drag.object) && !isFlying){
                
                /* let blacklist = this.drag && this.drag */
                let hoveredElements = this.getHoveredElements( ); 
                if(hoveredElements.length > 0){
                    let names = hoveredElements.map(h => h.object.name).join(", ");
                    if (this.logMessages) console.log(`${this.constructor.name}: onMouseMove; hovered: '${names}'`);
                }
            
                let curr = hoveredElements.map(a => a.object).find(a => true);//只取第一个
                let prev = this.lastMouseoverElement //this.hoveredElements.map(a => a.object).find(a => true);

                if(curr !== prev){
                    if(curr){ 
                        if (this.logMessages) console.log(`${this.constructor.name}: mouseover: ${curr.name}`);
                        curr.dispatchEvent({
                            type: 'mouseover',
                            object: curr,
                        });
                    }
                    if(prev){
                        if (this.logMessages) console.log(`${this.constructor.name}: mouseleave: ${prev.name}`);
                        prev.dispatchEvent({
                            type: 'mouseleave',
                            object: prev,
                        });
                    }
                    
                    this.lastMouseoverElement = curr
                    viewer.dispatchEvent('content_changed') 
                }

                if(hoveredElements.length > 0){
                    let object = hoveredElements
                        .map(e => e.object)
                        .find(e => (e._listeners && e._listeners['mousemove']));
                    
                    if(object){
                        object.dispatchEvent({
                            type: 'mousemove',
                            object: object
                        });
                    } 
                }
                this.hoveredElements = hoveredElements
            }
            
            
            
            //this.intersect = this.getWholeIntersect()
            
             
            
            this.viewer.dispatchEvent($.extend(  
                this.getEventDesc(e,isTouch),
                {
                    type: 'global_mousemove',
                    
                }
            ))
            
             
        }
        
		
		
	}
	
	onMouseWheel(e){
		if(!this.enabled) return;

		if(this.logMessages) console.log(this.constructor.name + ": onMouseWheel");
		
		e.preventDefault();

		let delta = 0;
		if (e.wheelDelta !== undefined) { // WebKit / Opera / Explorer 9
			delta = e.wheelDelta;
		} else if (e.detail !== undefined) { // Firefox
			delta = -e.detail;
		}

		let ndelta = Math.sign(delta);

		// this.wheelDelta += Math.sign(delta);
        
        
        if(!this.hoverViewport){//调试手机版时会无
            var  {   viewport  } = this.getPointerInViewport(e.clientX, e.clientY ) 
            this.hoverViewport = viewport
        }
        
		if (this.hoveredElement) {
			this.hoveredElement.object.dispatchEvent($.extend(  
                this.getEventDesc(e,isTouch),
                {
                    type: 'mousewheel',
                    delta: ndelta, 
                    object: this.hoveredElement.object
                }
            )); 
            
		} else {
            this.viewer.dispatchEvent($.extend(  
                this.getEventDesc(e),
                {
                    type: 'global_mousewheel',
                    delta: ndelta, 
                }
            ));
              
		}
        
        setTimeout(()=>{
            this.dealPointerMove(e )//add 在更新完view后重新获取intersect 和 drag
        },1)//只延迟1会崩溃吗
        
        
	}




	startDragging (object, args = null) {

		let name = object ? object.name : "no name";
		if (this.logMessages) console.log(`${this.constructor.name}: startDragging: '${name}'`);

		this.drag = {
			start: this.pointer.clone(),
			end: this.pointer.clone(),
			pointerDelta: new THREE.Vector2(0, 0), 
			object: object, 
            hoverViewport: this.hoverViewport,   //会变化
            dragViewport: this.hoverViewport, //不变
		};
        if (args) {
			for (let key of Object.keys(args)) {
				this.drag[key] = args[key];
			}
		}
        
        if(object){
            object.dispatchEvent($.extend(  
                this.getEventDesc(),
                {
                    type: 'startDragging' 
                }
            )); 
        }
		 
	}

	/* getMousePointCloudIntersection (mouse) {
		return Utils.getMousePointCloudIntersection(
			this.mouse, 
			this.scene.getActiveCamera(), 
			this.viewer, 
			this.scene.pointclouds);
	} */

	toggleSelection (object) {
		let oldSelection = this.selection;

		let index = this.selection.indexOf(object);

		if (index === -1) {
			this.selection.push(object);
			object.dispatchEvent({
				type: 'select'
			});
		} else {
			this.selection.splice(index, 1);
			object.dispatchEvent({
				type: 'deselect'
			});
		}

		this.dispatchEvent({
			type: 'selection_changed',
			oldSelection: oldSelection,
			selection: this.selection
		});
        viewer.dispatchEvent('content_changed') 
	}

	deselect(object){

		let oldSelection = this.selection;

		let index = this.selection.indexOf(object);

		if(index >= 0){
			this.selection.splice(index, 1);
			object.dispatchEvent({
				type: 'deselect'
			});

			this.dispatchEvent({
				type: 'selection_changed',
				oldSelection: oldSelection,
				selection: this.selection
			});
		}
        viewer.dispatchEvent('content_changed') 
	}

	deselectAll () {
		for (let object of this.selection) {
			object.dispatchEvent({
				type: 'deselect'
			});
		}

		let oldSelection = this.selection;

		if (this.selection.length > 0) {
			this.selection = [];
			this.dispatchEvent({
				type: 'selection_changed',
				oldSelection: oldSelection,
				selection: this.selection
			});
		}
        viewer.dispatchEvent('content_changed') 
	}

	isSelected (object) {
		let index = this.selection.indexOf(object);

		return index !== -1;
	}

	registerInteractiveObject(object){
		this.interactiveObjects.add(object);
	}

	removeInteractiveObject(object){
		this.interactiveObjects.delete(object);
	}

	registerInteractiveScene (scene) {
		let index = this.interactiveScenes.indexOf(scene);
		if (index === -1) {
			this.interactiveScenes.push(scene);
		}
	}

	unregisterInteractiveScene (scene) {
		let index = this.interactiveScenes.indexOf(scene);
		if (index > -1) {
			this.interactiveScenes.splice(index, 1);
		}
	}

	getHoveredElement () {
		let hoveredElements = this.getHoveredElements();
		if (hoveredElements.length > 0) {
			return hoveredElements[0];
		} else {
			return null;
		}
	}
  
    
     
 
	getHoveredElements (interactables, dontCheckDis, raycaster) { 
		
        if(!interactables){
             
             
            let scenes = this.hoverViewport.interactiveScenes || this.interactiveScenes.concat(this.scene);

            let interactableListeners = ['mouseup', 'mousemove', 'mouseover', 'mouseleave', 'drag', 'drop', 'click', 'select', 'deselect'];
            interactables = []
            for (let scene of scenes) {
                scene.traverseVisible(node => {//检测加了侦听的object
                    if (node._listeners && node.visible && !this.blacklist.has(node) ) {
                        let hasInteractableListener = interactableListeners.filter((e) => {
                            return node._listeners[e] !== undefined;
                        }).length > 0;

                        if (hasInteractableListener) {
                            interactables.push(node);
                        }                        
                    }
                });
            }  
		}  
		 
		let camera = this.hoverViewport.camera
        if(!raycaster){ 
            let ray = Utils.mouseToRay(this.pointer, camera  );
            
            raycaster = new THREE.Raycaster();
            raycaster.ray.set(ray.origin, ray.direction);  
            raycaster.camera = camera //add 
        }
        if(camera.type == "OrthographicCamera"){//使无论多远，threshold区域都是一样宽的
            raycaster.params.Line.threshold = 20/camera.zoom  
        }else{
            raycaster.params.Line.threshold = 0.04; //相对长度 
        } 
        raycaster.params.Line2 = {threshold :20 } //拓宽的lineWidth
        
        //raycaster.layers.enableAll()//add
        Potree.Utils.setCameraLayers(raycaster,   //设置能识别到的layers（如空间模型里只有mapViewer能识别到marker）
            ['sceneObjects','mapObjects','measure',  'transformationTool', 'model'],
            this.hoverViewport && this.hoverViewport.extraEnableLayers
        )
        //this.hoverViewport.beforeRender && this.hoverViewport.beforeRender()
        
        viewer.dispatchEvent( {type:'raycaster',  viewport: this.hoverViewport})//add
		let intersections = raycaster.intersectObjects(interactables.filter(o => o.visible), true, null, true); //原本是false 检测不到children
    
        let intersectionsCopy = intersections.slice()
        
        
        
        if(this.intersect && this.intersect.distance != void 0 && !dontCheckDis){//add
            intersections = intersections.filter(e=>{
                let material = e.object.material
                
                return e.object.pickDontCheckDis || ( material.depthTest == false || material.depthWrite == false) && !material.realUseDepth  //!material.depthTestWhenPick
                 || ( material.useDepth ? e.distance < this.intersect.distance + material.uniforms.occlusionDistance.value : e.distance < this.intersect.distance )
            }) 
        }
     
       
        intersections = intersections.map(e=>{//add 转化为interactables
            var object = e.object; 
            do{ 
               if(interactables.includes(object)) {
                   e.oriObject = e.object;
                   e.object = object; 
                   break
               } 
               object = object.parent
            }while(object)
       
            return e
        })
        
        
      
        
        
        
        //add for测量线，在检测到sphere时优先选中sphere而非线
         
        //intersections = intersections.sort(function(a,b){return b.object.renderOrder-a.object.renderOrder}) // 降序
        intersections = intersections.sort(function(a,b){
            let order2 = b.object.pickOrder || 0
            let order1 = a.object.pickOrder || 0
            return order2-order1
        }) // 降序
        
        
        //console.log('getHoveredElement ', intersections)
		return intersections;
	}

	/* setScene (scene) {
		this.deselectAll();

		this.scene = scene;
	} */

	update (delta) {

	}

	/*getNormalizedDrag () {
		if (!this.drag) {
			return new THREE.Vector2(0, 0);
		}

		let diff = new THREE.Vector2().subVectors(this.drag.end, this.drag.start);

		diff.x = diff.x / this.domElement.clientWidth;
		diff.y = diff.y / this.domElement.clientHeight;

		return diff;
	}

	getNormalizedLastDrag () {
		if (!this.drag) {
			return new THREE.Vector2(0, 0);
		}

		let mouseDelta = this.drag.mouseDelta.clone();

		mouseDelta.x = mouseDelta.x / this.domElement.clientWidth;
		mouseDelta.y = mouseDelta.y / this.domElement.clientHeight;

		return mouseDelta;
	} */
     
    getMouseDirection(pointer) {//add 
        pointer = pointer || this.pointer
		let camera = this.hoverViewport.camera
        var t = new THREE.Vector3(pointer.x, pointer.y, -1).unproject(camera),
            i = new THREE.Vector3(pointer.x, pointer.y, 1).unproject(camera);
            
        return {origin: t, direction:i.clone().sub(t).normalize() }    
         
    }
    
    
}