//from cdxiaodao cesium.js
//measure or survey point, height, distance, area
(function (window) {
	'use strict';
	
	function define_CesiumSurvey() {
		//Main object
		var CesiumSurvey = {};
		var handler;
		
		//Get 3D position String when left_click
		CesiumSurvey.getPosition = function(viewer){
		    handler = handler && handler.destroy();
		    handler = new Cesium.ScreenSpaceEventHandler(viewer.scene.canvas);
		    var resultStr;
		    handler.setInputAction(function(movement){
		        var cp = viewer.scene.pickPosition(movement.position);
		        var pickedPositionString = cp.toString();
		        //获取地理坐标（经度、纬度、高程）
		        var cartographic = Cesium.Cartographic.fromCartesian(cp);
		        var longitudeString = Cesium.Math.toDegrees(cartographic.longitude);
		        var latitudeString = Cesium.Math.toDegrees(cartographic.latitude);
		        var heightString = cartographic.height;
		        var getResult = pickedPositionString+'\r\n'+
		            '======================'+'\r\n'+
		            '经度：'+longitudeString+'\r\n'+
		            '纬度：'+latitudeString+'\r\n'+
		            '高程：'+heightString+'\r\n'+
		            '======================'+'\r\n';
		        resultStr = longitudeString+","+latitudeString+","+heightString;
		        alert(getResult);
		    },Cesium.ScreenSpaceEventType.LEFT_CLICK);
		    handler.setInputAction(function(){
		        handler = handler && handler.destroy();
		    },Cesium.ScreenSpaceEventType.RIGHT_CLICK);
		    return resultStr;
		};
		
		//Get height String from 3dtiles to Mouse's position
		CesiumSurvey.measureHeight = function (viewer){
		    handler = handler && handler.destroy();
		    if((viewer.entities.getById('measureHeightLineEntity')!==undefined)){
		        viewer.entities.removeById('measureHeightLineEntity');
		    }
		    if((viewer.entities.getById('heightPlaneEntity')!==undefined)){
		        viewer.entities.removeById('heightPlaneEntity');
		    }
		    if((viewer.entities.getById('heightLabelEntity')!==undefined)){
		        viewer.entities.removeById('heightLabelEntity');
		    }
		    var isFirst = true;
		    var firstPosition;
		    var secondPosition;
		    var previousPosition;
		    var heightLineEntity = viewer.entities.add({
		        id : 'measureHeightLineEntity',
		        polyline : {
		            followSurface : false,
		            width : 3,
		            material : Cesium.Color.RED,
		            show : true
		        }
		    });
		    var heightPlaneEntity = viewer.entities.add({
		        id : 'heightPlaneEntity',
		        ellipse : {
		            outline : true,
		            show : false
		        }
		    });
		    var heightLabelEntity = viewer.entities.add({
		        id : 'heightLabelEntity',
		        label : {
		            show : false,
		            verticalOrigin : Cesium.VerticalOrigin.BOTTOM,
		            horizontalOrigin : Cesium.HorizontalOrigin.LEFT,
		            font : '16px Helvetica',
		            fillColor : Cesium.Color.YELLOW,
		            outlineColor : Cesium.Color.BLACK,
		            outlineWidth : 1,
		            style : Cesium.LabelStyle.FILL_AND_OUTLINE,
		            showBackground: true,
	                backgroundColor: new Cesium.Color(0, 0, 1, 0.8),
		        }
		    });
		    handler = new Cesium.ScreenSpaceEventHandler(viewer.scene.canvas);
		    handler.setInputAction(function(movement){
		        if(isFirst){
		            firstPosition = viewer.scene.pickPosition(movement.position);
		            var cartographic = Cesium.Cartographic.fromCartesian(firstPosition);
		            var height = cartographic.height;//模型高度
		            if(Number(height)<0){
		            	var ray = viewer.camera.getPickRay(movement.position);
		            	firstPosition = viewer.scene.globe.pick(ray,viewer.scene);
		            }
		            isFirst = false;
		        }else{
		        	secondPosition = viewer.scene.pickPosition(movement.position);
		            var cartographic = Cesium.Cartographic.fromCartesian(secondPosition);
		            var height = cartographic.height;//模型高度
		            if(Number(height)<0){
		            	var ray = viewer.camera.getPickRay(movement.position);
		            	secondPosition = viewer.scene.globe.pick(ray,viewer.scene);
		            }
		            if(secondPosition){
		                previousPosition = secondPosition.clone();
		            }else{
		                secondPosition = previousPosition.clone();
		            }
		            var centerPosition = new Cesium.Cartesian3(
		                firstPosition.x * Cesium.Cartesian3.dot(firstPosition, secondPosition)/Cesium.Cartesian3.magnitudeSquared(firstPosition),
		                firstPosition.y * Cesium.Cartesian3.dot(firstPosition, secondPosition)/Cesium.Cartesian3.magnitudeSquared(firstPosition),
		                firstPosition.z * Cesium.Cartesian3.dot(firstPosition, secondPosition)/Cesium.Cartesian3.magnitudeSquared(firstPosition)
		            );
		            heightLineEntity.polyline.positions = [firstPosition,centerPosition];
		            heightPlaneEntity.position = centerPosition;
		            var cartographicCenter = Cesium.Cartographic.fromCartesian(centerPosition);
		            var cartographicFirst = Cesium.Cartographic.fromCartesian(firstPosition);
		            heightPlaneEntity.ellipse.height = cartographicCenter.height;
		            heightPlaneEntity.ellipse.material = (cartographicCenter.height>cartographicFirst.height)>0?Cesium.Color.YELLOW.withAlpha(0.5):Cesium.Color.DEEPPINK.withAlpha(0.2);
		            heightPlaneEntity.ellipse.semiMinorAxis = Cesium.Cartesian3.distance(centerPosition,secondPosition);
		            heightPlaneEntity.ellipse.semiMajorAxis = heightPlaneEntity.ellipse.semiMinorAxis;
		            heightPlaneEntity.ellipse.show = true;
		            heightLabelEntity.position = (cartographicCenter.height>cartographicFirst.height)>0?centerPosition:firstPosition;
		            heightLabelEntity.label.show = true;
		            resultStr = cartographicCenter.height-cartographicFirst.height;
		            heightLabelEntity.label.text = '高度：'+resultStr.toFixed(2)+'米';
		            var camera = viewer.scene.camera;
		            heightLabelEntity.label.eyeOffset = new Cesium.Cartesian3(0.0, 0.5, 0.0);
		        	handler = handler && handler.destroy();
		        }
		    },Cesium.ScreenSpaceEventType.LEFT_CLICK);
		    var resultStr;
		    handler.setInputAction(function(movement){
		        if(!isFirst){
		            secondPosition = viewer.scene.pickPosition(movement.endPosition);
		            var cartographic = Cesium.Cartographic.fromCartesian(secondPosition);
		            var height = cartographic.height;//模型高度
		            if(Number(height)<0){
		            	var ray = viewer.camera.getPickRay(movement.endPosition);
		            	secondPosition = viewer.scene.globe.pick(ray,viewer.scene);
		            }
		            if(secondPosition){
		                previousPosition = secondPosition.clone();
		            }else{
		                secondPosition = previousPosition.clone();
		            }
		            var centerPosition = new Cesium.Cartesian3(
		                firstPosition.x * Cesium.Cartesian3.dot(firstPosition, secondPosition)/Cesium.Cartesian3.magnitudeSquared(firstPosition),
		                firstPosition.y * Cesium.Cartesian3.dot(firstPosition, secondPosition)/Cesium.Cartesian3.magnitudeSquared(firstPosition),
		                firstPosition.z * Cesium.Cartesian3.dot(firstPosition, secondPosition)/Cesium.Cartesian3.magnitudeSquared(firstPosition)
		            );
		            heightLineEntity.polyline.positions = [firstPosition,centerPosition];
		            heightPlaneEntity.position = centerPosition;
		            var cartographicCenter = Cesium.Cartographic.fromCartesian(centerPosition);
		            var cartographicFirst = Cesium.Cartographic.fromCartesian(firstPosition);
		            heightPlaneEntity.ellipse.height = cartographicCenter.height;
		            heightPlaneEntity.ellipse.material = (cartographicCenter.height>cartographicFirst.height)>0?Cesium.Color.YELLOW.withAlpha(0.5):Cesium.Color.DEEPPINK.withAlpha(0.2);
		            heightPlaneEntity.ellipse.semiMinorAxis = Cesium.Cartesian3.distance(centerPosition,secondPosition);
		            heightPlaneEntity.ellipse.semiMajorAxis = heightPlaneEntity.ellipse.semiMinorAxis;
		            heightPlaneEntity.ellipse.show = true;
		            heightLabelEntity.position = (cartographicCenter.height>cartographicFirst.height)>0?centerPosition:firstPosition;
		            heightLabelEntity.label.show = true;
		            resultStr = cartographicCenter.height-cartographicFirst.height;
		            heightLabelEntity.label.text = '高度：'+resultStr.toFixed(2)+'米';
		            var camera = viewer.scene.camera;
		            heightLabelEntity.label.eyeOffset = new Cesium.Cartesian3(0.0, 0.5, 0.0);
		        }
		    },Cesium.ScreenSpaceEventType.MOUSE_MOVE);
		    handler.setInputAction(function(){
		        handler = handler && handler.destroy();
		    },Cesium.ScreenSpaceEventType.RIGHT_CLICK);
		    return resultStr;
		};
		
		//Get height String from 3dtiles to Mouse's position(三角尺)
		CesiumSurvey.measureHeightAngle = function (viewer){
		    handler = handler && handler.destroy();
		    if((viewer.entities.getById('measureHeightAngleLineEntity')!==undefined)){
		        viewer.entities.removeById('measureHeightAngleLineEntity');
		    }
		    if((viewer.entities.getById('heightAngleEntity')!==undefined)){
		        viewer.entities.removeById('heightAngleEntity');
		    }
		    if((viewer.entities.getById('heighthriEntity')!==undefined)){
		    	viewer.entities.removeById('heighthriEntity');
		    }
		    if((viewer.entities.getById('heightLabelAngleEntity')!==undefined)){
		        viewer.entities.removeById('heightLabelAngleEntity');
		    }
		    var isFirst = true;
		    var firstPosition;
		    var secondPosition;
		    var previousPosition;
		    var heightLineEntity = viewer.entities.add({
		        id : 'measureHeightAngleLineEntity',
		        polyline : {
		            followSurface : false,
		            width : 3,
		            material : Cesium.Color.RED,
		            show : true
		        }
		    });
		    var heightAngleEntity = viewer.entities.add({
		        id : 'heightAngleEntity',
		        polyline : {
		        	width : 3,
		            material : Cesium.Color.RED,
		            show : true
		        }
		    });
		    var heighthriEntity = viewer.entities.add({
		    	id : 'heighthriEntity',
		    	polyline : {
		    		width : 3,
		    		material : Cesium.Color.RED,
		    		show : true
		    	}
		    });
		    var heightLabelEntity = viewer.entities.add({
		        id : 'heightLabelAngleEntity',
		        label : {
		            show : false,
		            verticalOrigin : Cesium.VerticalOrigin.BOTTOM,
		            horizontalOrigin : Cesium.HorizontalOrigin.LEFT,
		            font : '16px Helvetica',
		            fillColor : Cesium.Color.YELLOW,
		            outlineColor : Cesium.Color.BLACK,
		            outlineWidth : 1,
		            style : Cesium.LabelStyle.FILL_AND_OUTLINE,
		            showBackground: true,
	                backgroundColor: new Cesium.Color(0, 0, 1, 0.8),
		        }
		    });
		    handler = new Cesium.ScreenSpaceEventHandler(viewer.scene.canvas);
		    handler.setInputAction(function(movement){
		        if(isFirst){
		            firstPosition = viewer.scene.pickPosition(movement.position);
		            var cartographic = Cesium.Cartographic.fromCartesian(firstPosition);
		            var height = cartographic.height;//模型高度
		            if(Number(height)<0){
		            	var ray = viewer.camera.getPickRay(movement.position);
		            	firstPosition = viewer.scene.globe.pick(ray,viewer.scene);
		            }
		            isFirst = false;
		        }else{
		        	secondPosition = viewer.scene.pickPosition(movement.position);
		            var cartographic = Cesium.Cartographic.fromCartesian(secondPosition);
		            var height = cartographic.height;//模型高度
		            if(Number(height)<0){
		            	var ray = viewer.camera.getPickRay(movement.position);
		            	secondPosition = viewer.scene.globe.pick(ray,viewer.scene);
		            }
		            if(secondPosition){
		                previousPosition = secondPosition.clone();
		            }else{
		                secondPosition = previousPosition.clone();
		            }
		            var centerPosition = new Cesium.Cartesian3(
		                firstPosition.x * Cesium.Cartesian3.dot(firstPosition, secondPosition)/Cesium.Cartesian3.magnitudeSquared(firstPosition),
		                firstPosition.y * Cesium.Cartesian3.dot(firstPosition, secondPosition)/Cesium.Cartesian3.magnitudeSquared(firstPosition),
		                firstPosition.z * Cesium.Cartesian3.dot(firstPosition, secondPosition)/Cesium.Cartesian3.magnitudeSquared(firstPosition)
		            );
		            heightLineEntity.polyline.positions = [firstPosition,centerPosition];
		            heightAngleEntity.polyline.positions = [firstPosition,secondPosition];
		            heighthriEntity.polyline.positions = [centerPosition,secondPosition];
		            var cartographicCenter = Cesium.Cartographic.fromCartesian(centerPosition);
		            var cartographicFirst = Cesium.Cartographic.fromCartesian(firstPosition);
		            heightAngleEntity.polyline.material = (cartographicCenter.height>cartographicFirst.height)>0?Cesium.Color.RED:Cesium.Color.YELLOW;
		            heighthriEntity.polyline.material = (cartographicCenter.height>cartographicFirst.height)>0?Cesium.Color.RED:Cesium.Color.YELLOW;
		            heightLabelEntity.position = (cartographicCenter.height>cartographicFirst.height)>0?centerPosition:firstPosition;
		            heightLabelEntity.label.show = true;
		            resultStr = cartographicCenter.height-cartographicFirst.height;
		            var resulthoriStr = Cesium.Cartesian3.distance(centerPosition, secondPosition);
		            var resultangleStr = Cesium.Cartesian3.distance(firstPosition, secondPosition);
		            heightLabelEntity.label.text = '高度：'+resultStr.toFixed(2)+'米\n'+"水平："+resulthoriStr.toFixed(2)+'米\n'+"直线："+resultangleStr.toFixed(2)+"米";
		            var camera = viewer.scene.camera;
		            heightLabelEntity.label.eyeOffset = new Cesium.Cartesian3(0.0, 0.5, 0.0);
		        	handler = handler && handler.destroy();
		        }
		    },Cesium.ScreenSpaceEventType.LEFT_CLICK);
		    var resultStr;
		    handler.setInputAction(function(movement){
		        if(!isFirst){
		        	secondPosition = viewer.scene.pickPosition(movement.endPosition);
		            var cartographic = Cesium.Cartographic.fromCartesian(secondPosition);
		            var height = cartographic.height;//模型高度
		            if(Number(height)<0){
		            	var ray = viewer.camera.getPickRay(movement.endPosition);
		            	secondPosition = viewer.scene.globe.pick(ray,viewer.scene);
		            }
		            if(secondPosition){
		                previousPosition = secondPosition.clone();
		            }else{
		                secondPosition = previousPosition.clone();
		            }
		            var centerPosition = new Cesium.Cartesian3(
		                firstPosition.x * Cesium.Cartesian3.dot(firstPosition, secondPosition)/Cesium.Cartesian3.magnitudeSquared(firstPosition),
		                firstPosition.y * Cesium.Cartesian3.dot(firstPosition, secondPosition)/Cesium.Cartesian3.magnitudeSquared(firstPosition),
		                firstPosition.z * Cesium.Cartesian3.dot(firstPosition, secondPosition)/Cesium.Cartesian3.magnitudeSquared(firstPosition)
		            );
		            heightLineEntity.polyline.positions = [firstPosition,centerPosition];
		            heightAngleEntity.polyline.positions = [firstPosition,secondPosition];
		            heighthriEntity.polyline.positions = [centerPosition,secondPosition];
		            var cartographicCenter = Cesium.Cartographic.fromCartesian(centerPosition);
		            var cartographicFirst = Cesium.Cartographic.fromCartesian(firstPosition);
		            heightAngleEntity.polyline.material = (cartographicCenter.height>cartographicFirst.height)>0?Cesium.Color.RED:Cesium.Color.YELLOW;
		            heighthriEntity.polyline.material = (cartographicCenter.height>cartographicFirst.height)>0?Cesium.Color.RED:Cesium.Color.YELLOW;
		            heightLabelEntity.position = (cartographicCenter.height>cartographicFirst.height)>0?centerPosition:firstPosition;
		            heightLabelEntity.label.show = true;
		            resultStr = cartographicCenter.height-cartographicFirst.height;
		            var resulthoriStr = Cesium.Cartesian3.distance(centerPosition, secondPosition);
		            var resultangleStr = Cesium.Cartesian3.distance(firstPosition, secondPosition);
		            heightLabelEntity.label.text = '高度：'+resultStr.toFixed(2)+'米\n'+"水平："+resulthoriStr.toFixed(2)+'米\n'+"直线："+resultangleStr.toFixed(2)+"米";
		            var camera = viewer.scene.camera;
		            heightLabelEntity.label.eyeOffset = new Cesium.Cartesian3(0.0, 0.5, 0.0);
		        }
		    },Cesium.ScreenSpaceEventType.MOUSE_MOVE);
		    handler.setInputAction(function(){
		        handler = handler && handler.destroy();
		    },Cesium.ScreenSpaceEventType.RIGHT_CLICK);
		    return resultStr;
		};
		
		//Get distence String between first left_click and second left_click
		CesiumSurvey.measureDist = function(viewer,type){
		    handler = handler && handler.destroy();
		    if((viewer.entities.getById('dynamicLineEntity')!==undefined)){
		        viewer.entities.removeById('dynamicLineEntity');
		    }
		    if((viewer.entities.getById('dynamicLineGroundEntity')!==undefined)){
		    	viewer.entities.removeById('dynamicLineGroundEntity');
		    }
		    if((viewer.entities.getById('measureLineEntity')!==undefined)){
		        viewer.entities.removeById('measureLineEntity');
		    }
		    if((viewer.entities.getById('measureLineGroundEntity')!==undefined)){
		    	viewer.entities.removeById('measureLineGroundEntity');
		    }
		    if((viewer.entities.getById('distLabelEntity')!==undefined)){
		        viewer.entities.removeById('distLabelEntity');
		    }
		    var isFirst = true;//是否为第一个点
		    var previousPosition;//前一个点的坐标
		    var currentPosition;//当前点坐标
		    var measureValue = 0.0;
		    //随鼠标移动的标签entity
		    var distLabelEntity = viewer.entities.add({
		        id : 'distLabelEntity',
		        label : {
		            show : false,
		            verticalOrigin : Cesium.VerticalOrigin.BOTTOM,
		            horizontalOrigin : Cesium.HorizontalOrigin.LEFT,
		            font : '16px Helvetica',
		            fillColor : Cesium.Color.YELLOW,
		            outlineColor : Cesium.Color.BLACK,
		            outlineWidth : 1,
		            style : Cesium.LabelStyle.FILL_AND_OUTLINE,
		            showBackground: true,
	                backgroundColor: new Cesium.Color(0, 0, 1, 0.8),
		        }
		    });
		    var show3d = true,show2d = false;
		    if(type=="two"){
		    	show2d = true;
		    	show3d = false;
		    }
		    //前一个点与鼠标连线的entity
		    var dynamicLineEntity = viewer.entities.add({
		        id : 'dynamicLineEntity',
		        polyline : {
		            followSurface : false,
		            width : 3,
		            material : Cesium.Color.YELLOW,
		            show : show3d
		        }
		    });
		    var dynamicLineGroundEntity = viewer.entities.add({
		    	id : 'dynamicLineGroundEntity',
		    	polyline : {
		    		clampToGround : true,
		    		width : 3,
		    		material : Cesium.Color.YELLOW,
		    		show : show2d,
		    	}
		    });
		    //已输入的线段的entity
		    var measureLineEntity = viewer.entities.add({
		        id : 'measureLineEntity',
		        polyline : {
		            followSurface : false,
		            width : 3,
		            material : Cesium.Color.RED,
		            show : show3d
		        }
		    });
		    var measureLineGroundEntity = viewer.entities.add({
		    	id : 'measureLineGroundEntity',
		    	polyline : {
		    		clampToGround : true,
		    		width : 3,
		    		material : Cesium.Color.RED,
		    		show : show2d
		    	}
		    });
		    var measureLinePositonsArray = [];//存储已量测的线段的折点
		    handler = new Cesium.ScreenSpaceEventHandler(viewer.scene.canvas);
		    handler.setInputAction(function(movement){
		        if(isFirst){
		            previousPosition = viewer.scene.pickPosition(movement.position);
		            var cartographic = Cesium.Cartographic.fromCartesian(previousPosition);
			        var height = cartographic.height;//模型高度
			        if(Number(height)<0){
			        	var ray = viewer.camera.getPickRay(movement.position);
			        	previousPosition = viewer.scene.globe.pick(ray,viewer.scene);
		            }
		            var tmp1 = previousPosition.clone();
		            measureValue = 0.0;
		            isFirst = false;
		            measureLinePositonsArray.push(tmp1);
		        }else{
		            currentPosition = viewer.scene.pickPosition(movement.position);
		            var cartographic = Cesium.Cartographic.fromCartesian(currentPosition);
			        var height = cartographic.height;//模型高度
			        if(Number(height)<0){
			        	var ray = viewer.camera.getPickRay(movement.position);
			        	currentPosition = viewer.scene.globe.pick(ray,viewer.scene);
		            }
		            var tmp2 = currentPosition.clone();
		            measureLinePositonsArray.push(tmp2);
		            measureLineEntity.polyline.positions = measureLinePositonsArray;
		            measureLineGroundEntity.polyline.positions = measureLinePositonsArray;
		            measureValue = measureValue + Cesium.Cartesian3.distance(currentPosition, previousPosition);
		            previousPosition = currentPosition.clone();
		        }
		    },Cesium.ScreenSpaceEventType.LEFT_CLICK);
		    var measureValueShow;
		    handler.setInputAction(function(movement){
		        //move事件监听
		        if(!isFirst){
		            //console.log('move，不是第一个点');
		            //获取当前点的坐标
		            currentPosition = viewer.scene.pickPosition(movement.endPosition);
		            var cartographic = Cesium.Cartographic.fromCartesian(currentPosition);
			        var height = cartographic.height;//模型高度
			        if(Number(height)<0){
			        	var ray = viewer.camera.getPickRay(movement.endPosition);
			        	currentPosition = viewer.scene.globe.pick(ray,viewer.scene);
		            }
		            if(currentPosition){
		                distLabelEntity.position = currentPosition;
		                distLabelEntity.label.show = true;
		                measureValueShow = measureValue+Cesium.Cartesian3.distance(currentPosition, previousPosition);
		                distLabelEntity.label.text = '距离：'+ measureValueShow.toFixed(2)+'米';
		                var camera = viewer.scene.camera;
		                distLabelEntity.label.eyeOffset = new Cesium.Cartesian3(0.0, 1, 0.0);
		                dynamicLineEntity.polyline.positions = [previousPosition,currentPosition];
		                dynamicLineGroundEntity.polyline.positions = [previousPosition,currentPosition];
		            }
		        }
		    },Cesium.ScreenSpaceEventType.MOUSE_MOVE);
		    handler.setInputAction(function(){
		        //move事件监听
		        handler = handler && handler.destroy();
		    },Cesium.ScreenSpaceEventType.RIGHT_CLICK);
		    return measureValueShow;
		};
		
		//Get area string by dynamic polygon on earth
		var pointArr = [];
		CesiumSurvey.measureArea = function(viewer){
			var measureAreaValue = 0.0;
		    var activeShapePoints = [];
		    handler = handler && handler.destroy();
		    if((viewer.entities.getById('areaLabelEntity')!==undefined)){
		        viewer.entities.removeById('areaLabelEntity');
		    }
		    if((viewer.entities.getById('areaEntity')!==undefined)){
		        viewer.entities.removeById('areaEntity');
		    }
		    for (var i = 0; i < pointArr.length; i++) {
		    	viewer.entities.remove(pointArr[i]);
		    }
		    var areaLabelEntity = viewer.entities.add({
		        id : 'areaLabelEntity',
		        label : {
		            show : false,
		            verticalOrigin : Cesium.VerticalOrigin.BOTTOM,
		            horizontalOrigin : Cesium.HorizontalOrigin.LEFT,
		            font : '16px Helvetica',
		            fillColor : Cesium.Color.YELLOW,
		            outlineColor : Cesium.Color.BLACK,
		            outlineWidth : 1,
		            style : Cesium.LabelStyle.FILL_AND_OUTLINE,
		            showBackground: true,
	                backgroundColor: new Cesium.Color(0, 0, 1, 0.8),
		        }
		    });
		    function createPoint(worldPosition) {
		    	pointArr.push(viewer.entities.add({
		            position : worldPosition,
		            point : {
		                color : Cesium.Color.RED,
		                pixelSize : 10,
		                outlineWidth : 1,
		                outlineColor : Cesium.Color.WHITE,
		                disableDepthTestDistance : 10000
		            }
		        }));
		    }
		    function drawPolygon(){
		    	if((viewer.entities.getById('areaEntity')!==undefined)){
    		        viewer.entities.removeById('areaEntity');
    		    }
            	viewer.entities.add({
		            id: 'areaEntity',
		            polygon: {
		                hierarchy: new Cesium.PolygonHierarchy(activeShapePoints),
		                	/*new Cesium.CallbackProperty(function () {
		                    return activeShapePoints;
		                }, false),*/
		                material: new Cesium.ColorMaterialProperty(Cesium.Color.YELLOW.withAlpha(0.6)),
		                classificationType : Cesium.ClassificationType.BOTH,
		                outline: true,
		                outlineColor: Cesium.Color.WHITE
		            }
		        });
		    }
		    function distance(point1,point2){
		        var point1cartographic = Cesium.Cartographic.fromCartesian(point1);
		        var point2cartographic = Cesium.Cartographic.fromCartesian(point2);
		        /**根据经纬度计算出距离**/
		        var geodesic = new Cesium.EllipsoidGeodesic();
		        geodesic.setEndPoints(point1cartographic, point2cartographic);
		        var s = geodesic.surfaceDistance;
		        //console.log(Math.sqrt(Math.pow(distance, 2) + Math.pow(endheight, 2)));
		        //返回两点之间的距离
		        s = Math.sqrt(Math.pow(s, 2) + Math.pow(point2cartographic.height - point1cartographic.height, 2));
		        return s;
		    }
		    var radiansPerDegree = Cesium.Math.PI / 180.0;//角度转化为弧度(rad)
		    var degreesPerRadian = 180.0 / Cesium.Math.PI;//弧度转化为角度
		    //计算多边形面积
		    function getArea(points) {
		        var res = 0.0;
		        //拆分三角曲面
		        for (var i = 0; i < points.length - 2; i++) {
		            var j = (i + 1) % points.length;
		            var k = (i + 2) % points.length;
		            var totalAngle = Angle(points[0], points[j], points[k]);
		            var dis_temp1 = distance(activeShapePoints[0], activeShapePoints[j]);
		            var dis_temp2 = distance(activeShapePoints[0], activeShapePoints[k]);
		            var tmp = 0.5*dis_temp1 * dis_temp2 * Math.sin(totalAngle*radiansPerDegree) ;
		            res = res+tmp;
		            //console.log(res);
		        }
		        return Math.abs(res.toFixed(1));//顺时针负，逆时针正
		    }
		    /*角度*/
		    function Angle(p1, p2, p3) {
		        var bearing12 = Bearing(p1, p2);
		        var bearing13 = Bearing(p1, p3);
		        var angle = bearing12 - bearing13;
		        if (angle < 0) {
		            angle += 360;
		        }
		        return angle;
		    }
		    /*方向*/
		    function Bearing(from, to) {
		        var lat1 = from.lat * radiansPerDegree;
		        var lon1 = from.lon * radiansPerDegree;
		        var lat2 = to.lat * radiansPerDegree;
		        var lon2 = to.lon * radiansPerDegree;
		        var angle = -Math.atan2(Math.sin(lon1 - lon2) * Math.cos(lat2), Math.cos(lat1) * Math.sin(lat2) - Math.sin(lat1) * Math.cos(lat2) * Math.cos(lon1 - lon2));
		        if (angle < 0) {
		            angle += Cesium.Math.PI * 2.0;
		        }
		        angle = angle * degreesPerRadian;//角度
		        return angle;
		    }
		    //选点
		    handler = new Cesium.ScreenSpaceEventHandler(viewer.scene.canvas);
		    handler.setInputAction(function(movement){
		        var earthPosition = viewer.scene.pickPosition(movement.position);
				//获取地理坐标（经度、纬度、高程）
		        var cartographic = Cesium.Cartographic.fromCartesian(earthPosition);
		        var height = cartographic.height;//模型高度
		        if(Number(height)<0){
		        	var ray = viewer.camera.getPickRay(movement.position);
		        	earthPosition = viewer.scene.globe.pick(ray,viewer.scene);
		        }
		        if (Cesium.defined(earthPosition)) {
		            activeShapePoints.push(earthPosition);
		            if(activeShapePoints.length>3){
		            	drawPolygon();
		            }
		            createPoint(earthPosition);
		        }
		    },Cesium.ScreenSpaceEventType.LEFT_CLICK);
		    //移动
		    handler.setInputAction(function(movement) {
	            var newPosition = viewer.scene.pickPosition(movement.endPosition);
	            var cartographic = Cesium.Cartographic.fromCartesian(newPosition);
		        var height = cartographic.height;//模型高度
		        if(Number(height)<0){
		        	var ray = viewer.camera.getPickRay(movement.endPosition);
		        	newPosition = viewer.scene.globe.pick(ray,viewer.scene);
		        }
	            activeShapePoints.pop();
	            activeShapePoints.push(newPosition);
		    }, Cesium.ScreenSpaceEventType.MOUSE_MOVE);
		    //结束并计算
		    var areaResult;
		    handler.setInputAction(function(movement){
		        handler = handler && handler.destroy();
		        if(activeShapePoints.length >2){
		            var rightPosition = viewer.scene.pickPosition(movement.position);
		            var cartographic = Cesium.Cartographic.fromCartesian(rightPosition);
			        var height = cartographic.height;//模型高度
			        if(Number(height)<0){
			        	var ray = viewer.camera.getPickRay(movement.position);
			        	rightPosition = viewer.scene.globe.pick(ray,viewer.scene);
			        }
		            var tempPoints=[];
		            for(var pindex = 0;pindex<activeShapePoints.length;pindex++){
		                var cartographic = Cesium.Cartographic.fromCartesian(activeShapePoints[pindex].clone());
		                var longitudeString = Cesium.Math.toDegrees(cartographic.longitude);
		                var latitudeString = Cesium.Math.toDegrees(cartographic.latitude);
		                var heightString = cartographic.height;
		                tempPoints.push({ lon: longitudeString, lat: latitudeString ,hei:heightString});
		            }
		            drawPolygon();
		            areaResult = getArea(tempPoints);
		            areaLabelEntity.label.text = '面积：'+ areaResult +'平方米';
		            areaLabelEntity.position = rightPosition.clone();
		            areaLabelEntity.label.show = true;
		            var camera = viewer.scene.camera;
		            areaLabelEntity.label.eyeOffset = new Cesium.Cartesian3(0.0, 0.5, 0.0);
		        }
		    },Cesium.ScreenSpaceEventType.RIGHT_CLICK);
		    return areaResult;
		};
		
		var measurePointArr = [];
		CesiumSurvey.measurePoint = function(viewer,img){
			var poiResult;
			handler = handler && handler.destroy();
			handler = new Cesium.ScreenSpaceEventHandler(viewer.scene.canvas);
		    handler.setInputAction(function(movement){
		    	//获取鼠标点击处的坐标
		        var cartesian = viewer.scene.pickPosition(movement.position);
		        var cartographic = Cesium.Cartographic.fromCartesian(cartesian);
		        var height = cartographic.height;//模型高度
		        if(Number(height)<0){
		        	var ray = viewer.camera.getPickRay(movement.position);
	        	    cartesian = viewer.scene.globe.pick(ray,viewer.scene);
		        }
		        cartographic = Cesium.Cartographic.fromCartesian(cartesian);
		        height = cartographic.height;//地形高度
		        var lng = Cesium.Math.toDegrees(cartographic.longitude);
		        var lat = Cesium.Math.toDegrees(cartographic.latitude);
		        var heading = Cesium.Math.toDegrees(viewer.camera.heading);
		        var pitch = Cesium.Math.toDegrees(viewer.camera.pitch);
		        var roll = Cesium.Math.toDegrees(viewer.camera.roll);
		        poiResult = lng.toFixed(4)+"\u00B0"+"\n"+lat.toFixed(4)+"\u00B0"+"\n"+height.toFixed(1)+"米";
		        console.log(lng+','+lat+','+height+','+heading+','+pitch+','+roll);
		        var pinBuilder = new Cesium.PinBuilder();//创建cesium pin标签
		        var point;
		        if(img&&img!=''){
		        	point = viewer.entities.add({
			        	id : 'measurePointEntity'+new Date().getTime(),
						position : cartesian.clone(),
						billboard : {
						    image : img,
						    verticalOrigin : Cesium.VerticalOrigin.BOTTOM,
						    pixelOffset : new Cesium.Cartesian2(43.0, 0.0),
						},
						label : {
							show : true,
							verticalOrigin : Cesium.VerticalOrigin.BOTTOM,
							horizontalOrigin : Cesium.HorizontalOrigin.CENTER,
							font : 'bold 16px Helvetica',
							fillColor : Cesium.Color.WHITE,
							text : poiResult,
							pixelOffset : new Cesium.Cartesian2(56.0, -126.0),
							disableDepthTestDistance : 100000000,
						}
					});
		        }else{
		        	point = viewer.entities.add({
			        	id : 'measurePointEntity'+new Date().getTime(),
						position : cartesian.clone(),
						billboard : {
						    image : pinBuilder.fromText('测',Cesium.Color.RED,36).toDataURL(),
						    verticalOrigin : Cesium.VerticalOrigin.BOTTOM
						},
						label : {
							show : true,
							verticalOrigin : Cesium.VerticalOrigin.BOTTOM,
							horizontalOrigin : Cesium.HorizontalOrigin.CENTER,
							font : '16px sans-serif',
							fillColor : Cesium.Color.YELLOW,
							outlineColor : Cesium.Color.BLACK,
							outlineWidth : 1,
							style : Cesium.LabelStyle.FILL_AND_OUTLINE,
							text : poiResult,
							pixelOffset : new Cesium.Cartesian2(0.0, -14.0),
							pixelOffsetScaleByDistance : new Cesium.NearFarScalar(1.5e2, 3.0, 1.5e7, 0.5),
							backgroundColor: Cesium.Color.BLUE.withAlpha(0.8),
							showBackground: true,
						}
					});
		        }
		        measurePointArr.push(point);
		    }, Cesium.ScreenSpaceEventType.LEFT_CLICK);
		    handler.setInputAction(function(movement){
		    	handler = handler && handler.destroy();
		    }, Cesium.ScreenSpaceEventType.RIGHT_CLICK);
			return poiResult;
		};
		
		var mmhandler;
		CesiumSurvey.measureMovePoint = function(viewer,resultid){
			mmhandler = new Cesium.ScreenSpaceEventHandler(viewer.scene.canvas);
			//移动
			mmhandler.setInputAction(function(movement) {
	            var newPosition = viewer.scene.pickPosition(movement.endPosition);
	            if(newPosition!=undefined){
	            	var cartographic = Cesium.Cartographic.fromCartesian(newPosition);
	            	var height = cartographic.height;//模型高度
	            	if(Number(height)<0){
	            		var ray = viewer.camera.getPickRay(movement.endPosition);
	            		newPosition = viewer.scene.globe.pick(ray,viewer.scene);
	            		cartographic = Cesium.Cartographic.fromCartesian(newPosition);
	            	}
	            	height = cartographic.height;//地形高度
	            	var lng = Cesium.Math.toDegrees(cartographic.longitude);
	            	var lat = Cesium.Math.toDegrees(cartographic.latitude);
	            	var camPoiR = viewer.camera.position;
	            	var camcartographic = Cesium.Cartographic.fromCartesian(camPoiR);
	            	var camheight = camcartographic.height;//地形高度
	            	var camlng = Cesium.Math.toDegrees(camcartographic.longitude);
	            	var camlat = Cesium.Math.toDegrees(camcartographic.latitude);
	            	var heading = Cesium.Math.toDegrees(viewer.camera.heading);
	            	var pitch = Cesium.Math.toDegrees(viewer.camera.pitch);
	            	var roll = Cesium.Math.toDegrees(viewer.camera.roll);
	            	var poiResult = lng.toFixed(4)+"\u00B0"+","+lat.toFixed(4)+"\u00B0"+","+height.toFixed(1)+"米"
	            	document.getElementById(resultid).innerHTML = poiResult;
	            }
		    }, Cesium.ScreenSpaceEventType.MOUSE_MOVE);
		};
		
		var cammmhandler;
		CesiumSurvey.cammeasureMovePoint = function(viewer,camresultid){
			cammmhandler = new Cesium.ScreenSpaceEventHandler(viewer.scene.canvas);
			//移动
			cammmhandler.setInputAction(function(movement) {
		        var camPoiR = viewer.camera.position;
		        var camcartographic = Cesium.Cartographic.fromCartesian(camPoiR);
		        var camheight = camcartographic.height;//地形高度
		        var camlng = Cesium.Math.toDegrees(camcartographic.longitude);
		        var camlat = Cesium.Math.toDegrees(camcartographic.latitude);
		        var heading = Cesium.Math.toDegrees(viewer.camera.heading);
		        var pitch = Cesium.Math.toDegrees(viewer.camera.pitch);
		        var roll = Cesium.Math.toDegrees(viewer.camera.roll);
		        var camResult = camlng.toFixed(4)+"\u00B0"+","+camlat.toFixed(4)+"\u00B0"+","+camheight.toFixed(1)+"米,"
		        				+heading.toFixed(2)+"\u00B0"+","+pitch.toFixed(2)+"\u00B0"+","+roll.toFixed(1)+"\u00B0";
		        document.getElementById(camresultid).innerHTML = camResult;
		    }, Cesium.ScreenSpaceEventType.MOUSE_MOVE);
		};
		
		//Clear measure result
		CesiumSurvey.measureClear = function(viewer){
		    handler = handler && handler.destroy();
		    if((viewer.entities.getById('measureHeightLineEntity')!==undefined)){
	            viewer.entities.removeById('measureHeightLineEntity');
		    }
		    if((viewer.entities.getById('heightPlaneEntity')!==undefined)){
	            viewer.entities.removeById('heightPlaneEntity');
		    }
		    if((viewer.entities.getById('heightLabelEntity')!==undefined)){
	            viewer.entities.removeById('heightLabelEntity');
		    }
		    if((viewer.entities.getById('measureHeightAngleLineEntity')!==undefined)){
		        viewer.entities.removeById('measureHeightAngleLineEntity');
		    }
		    if((viewer.entities.getById('heightAngleEntity')!==undefined)){
		        viewer.entities.removeById('heightAngleEntity');
		    }
		    if((viewer.entities.getById('heighthriEntity')!==undefined)){
		    	viewer.entities.removeById('heighthriEntity');
		    }
		    if((viewer.entities.getById('heightLabelAngleEntity')!==undefined)){
		        viewer.entities.removeById('heightLabelAngleEntity');
		    }
		    if((viewer.entities.getById('dynamicLineEntity')!==undefined)){
	            viewer.entities.removeById('dynamicLineEntity');
		    }
		    if((viewer.entities.getById('dynamicLineGroundEntity')!==undefined)){
		    	viewer.entities.removeById('dynamicLineGroundEntity');
		    }
		    if((viewer.entities.getById('measureLineEntity')!==undefined)){
	            viewer.entities.removeById('measureLineEntity');
		    }
		    if((viewer.entities.getById('measureLineGroundEntity')!==undefined)){
		    	viewer.entities.removeById('measureLineGroundEntity');
		    }
		    if((viewer.entities.getById('distLabelEntity')!==undefined)){
	            viewer.entities.removeById('distLabelEntity');
		    }
		    if((viewer.entities.getById('areaLabelEntity')!==undefined)){
	            viewer.entities.removeById('areaLabelEntity');
		    }
		    if((viewer.entities.getById('areaEntity')!==undefined)){
	            viewer.entities.removeById('areaEntity');
		    }
		    for (var i = 0; i < pointArr.length; i++) {
		    	viewer.entities.remove(pointArr[i]);
		    }
		    if((viewer.entities.getById('measurePointEntity')!==undefined)){
		    	viewer.entities.removeById('measurePointEntity');
		    }
		    for ( var i = 0; i < measurePointArr.length; i++) {
		    	viewer.entities.remove(measurePointArr[i]);
			}
		    //measurePointArr = [];
		    return true;
		};
		
		//shutdown handler
		CesiumSurvey.clearHandler = function(){
			handler = handler && handler.destroy();
		};
		
		//shutdown mmhandler
		CesiumSurvey.clearMMHandler = function(){
			mmhandler = mmhandler && mmhandler.destroy();
		};
		
		//shutdown cammmhandler
		CesiumSurvey.clearCamMMHandler = function(){
			cammmhandler = cammmhandler && cammmhandler.destroy();
		};
		
		return CesiumSurvey;
	}
	if (typeof(CesiumSurvey) === 'undefined') {
		window.CesiumSurvey = define_CesiumSurvey();
	} else {
		console.log("CesiumSurvey already defined.");
	}
})(window);