//指定起点
var routeStart;
var routeEnd;
function addpoi(type){
	var handler = new Cesium.ScreenSpaceEventHandler(viewer.scene.canvas);
	handler.setInputAction(function(movement) {
		//获取鼠标点击处的坐标
		var poiStr;
        var cartesian = viewer.scene.pickPosition(movement.position);
        if (Cesium.defined(cartesian)) {
            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);
            var lng = Cesium.Math.toDegrees(cartographic.longitude);
            var lat = Cesium.Math.toDegrees(cartographic.latitude);
            poiStr = lat+','+lng;
        }
        if(type=="start"){
        	$('#startStr').val(poiStr);
        	//创建标注
            var startpoiPin = viewer.entities.getById("startpoiId");
            if(startpoiPin == undefined){
            	routeStart = viewer.entities.add({
            		id :"startpoiId",
            		position :cartesian.clone(),
        	        billboard : {
        	            image : '../images/pinimg/30.png',
        	            verticalOrigin : Cesium.VerticalOrigin.BOTTOM,
        	            scaleByDistance : new Cesium.NearFarScalar(1000, 1, 20000, 0.2),
        	            pixelOffsetScaleByDistance : new Cesium.NearFarScalar(1000, 1, 20000, 0.2),
        	        }
        	    });
            }else{
            	startpoiPin.position = cartesian.clone();
            }
    	}else{
    		$('#endStr').val(poiStr);
    		//创建标注
            var endpoiPin = viewer.entities.getById("endpoiId");
            if(endpoiPin == undefined){
            	routeEnd = viewer.entities.add({
            		id :"endpoiId",
            		position :cartesian.clone(),
        	        billboard : {
        	        	image : '../images/pinimg/31.png',
        	            verticalOrigin : Cesium.VerticalOrigin.BOTTOM,
        	            scaleByDistance : new Cesium.NearFarScalar(1000, 1, 20000, 0.2),
        	            pixelOffsetScaleByDistance : new Cesium.NearFarScalar(1000, 1, 20000, 0.2),
        	        }
        	    });
            }else{
            	endpoiPin.position = cartesian.clone();
            }
    	}
		handler.destroy();
	}, Cesium.ScreenSpaceEventType.LEFT_CLICK);
}
//路径导航，向百度服务发送请求
function getRoadNav(url){
	$.ajax({
      url: url,
      dataType: "jsonp",
      async: false,
      cache:false,
      success:function(data){
      	showRouteLine(data);
      }
	});
}
//显示路径导航
function showRoadNav(){
	var startpoi = $('#startStr').val();
	var endpoi = $('#endStr').val();
	if(startpoi!=""&&endpoi!=""){
		var url = "http://api.map.baidu.com/direction/v2/driving?origin="
			+startpoi+"&destination="+endpoi+"&coord_type=wgs84&tactics=5"
			+"&alternatives=0&ak=ZpRjzwQe7dQCVzTR9zytcdLO";
		getRoadNav(url);
	}else{
		swal("起终点不能为空!","请重试！","error");
	}
}
//创建路径线(进一步可增加动画或流动线效果)
var steplineArr = [];
var steplabelArr = [];
function showRouteLine(data){
	clearRouteLine();
	if(data.status==0){
		for ( var i = 0; i < data.result.routes[0].steps.length; i++) {
			var step = data.result.routes[0].steps[i];
			var pathArr = step.path.split(/[,;]/);
			var wgs84pathArr = [];
			for ( var m = 0; m < pathArr.length; m=m+2) {
				var wgs84poi = bd09towgs84(pathArr[m],pathArr[m+1]);
				wgs84pathArr.push(wgs84poi);
			}
			var traConCount = 0;
			for ( var j = 0; j < step.traffic_condition.length; j++) {
				var traCon = step.traffic_condition[j];
				var trafficStr = "";
				var roadColor = Cesium.Color.YELLOW;
				switch (traCon.status) {
				case 0:
					trafficStr = "无路况";
					roadColor = Cesium.Color.YELLOW;
					break;
				case 1:
					trafficStr = "畅通";
					roadColor = Cesium.Color.YELLOW;
					break;
				case 2:
					trafficStr = "缓行";
					roadColor = Cesium.Color.ORANGE;
					break;
				case 3:
					trafficStr = "拥堵";
					roadColor = Cesium.Color.RED;
					break;
				case 4:
					trafficStr = "非常拥堵";
					roadColor = Cesium.Color.DARKRED;
					break;
				default:
					break;
				}
				var subwgs84pathArr = wgs84pathArr.slice(traConCount,traConCount+traCon.geo_cnt+1);
				var linesubwgs84pathArr = [];
				for ( var n = 0; n < subwgs84pathArr.length; n++) {
					linesubwgs84pathArr.push(subwgs84pathArr[n][0],subwgs84pathArr[n][1]);
				}
				var stepline = viewer.entities.add({
				    polyline : {
				        positions : Cesium.Cartesian3.fromDegreesArray(linesubwgs84pathArr),
				        width : 8,
				        material : new Cesium.PolylineOutlineMaterialProperty({
				            color : roadColor,
				            outlineWidth : 2,
				            outlineColor : Cesium.Color.BLACK
				        }),
				        clampToGround : true,
				        classificationType : Cesium.ClassificationType.BOTH
				    },
				});
				steplineArr.push(stepline);
				var point = Cesium.Cartesian3.fromDegrees(
						Number(subwgs84pathArr[0][0]), Number(subwgs84pathArr[0][1]), 137);
				var clampedpoint = viewer.scene.clampToHeight(point);
				var steptext = '';
				if(traConCount==0){
					steptext = step.road_name+' | '+traCon.distance+'米 | '+trafficStr;
				}else{
					steptext = traCon.distance+'米 | '+trafficStr;
				}
				var steplabel = viewer.entities.add({
					//position :point,
					position :clampedpoint,
					billboard : {
						image : '../images/pinimg/37.png',
						verticalOrigin : Cesium.VerticalOrigin.BOTTOM,
						horizontalOrigin : Cesium.HorizontalOrigin.CENTER,
						scaleByDistance : new Cesium.NearFarScalar(1000, 1, 20000, 0.2),
			            pixelOffsetScaleByDistance : new Cesium.NearFarScalar(1000, 1, 20000, 0.2),
					},label : {
			            verticalOrigin : Cesium.VerticalOrigin.BOTTOM,
			            horizontalOrigin : Cesium.HorizontalOrigin.CENTER,
			            font : 'bold 15px Helvetica',
			            fillColor : Cesium.Color.WHITE,
			            text : steptext,
			            disableDepthTestDistance : 100000000,
						pixelOffset : new Cesium.Cartesian2(0, -35.0),
						scaleByDistance : new Cesium.NearFarScalar(1000, 1, 20000, 0.2),
			            pixelOffsetScaleByDistance : new Cesium.NearFarScalar(1000, 1, 20000, 0.2),
			        }
				});
				steplabelArr.push(steplabel);
				traConCount = traConCount + traCon.geo_cnt;
			}
		}
	}else{
		swal("路径导航服务请求失败!","请重试！","error");
	}
}
//清除导航路线
function clearRouteLine(){
	for ( var i = 0; i < steplineArr.length; i++) {
		viewer.entities.remove(steplineArr[i]);
	}
	for ( var j = 0; j < steplabelArr.length; j++) {
		viewer.entities.remove(steplabelArr[j]);
	}
}
//清除导航起始点
function clearRoutePoi(){
	viewer.entities.remove(routeStart);
	viewer.entities.remove(routeEnd);
}

/***************************上：路径导航;下：通视分析********************************************/

//单线通视线分析
function showVisibleLine(){
	var options = {
		"viewer": viewer,
		"drawColor": Cesium.Color.YELLOW,
		"originColor": Cesium.Color.BLUE,
		"targetColor": Cesium.Color.BLUE,
		"breakColor": Cesium.Color.YELLOW,
		"visibleColor": Cesium.Color.GREEN,
		"hiddenColor": Cesium.Color.RED,
		"bodyHeight": 1.78, //用于做视域分析的人员身高
		"bodyColor": Cesium.Color.YELLOW,
	};
	var result = CesiumVisibleLine.drawLines(options);
}
//清除可视线
function clearVisible(){
	CesiumVisibleLine.removeLines(viewer);
}
//环状通视线分析
function showVisibleCircle(){
	var options = {
		"viewer": viewer,
		"drawColor": Cesium.Color.YELLOW,
		"originColor": Cesium.Color.BLUE,
		"targetColor": Cesium.Color.YELLOW,
		"breakColor": Cesium.Color.YELLOW,
		"visibleColor": Cesium.Color.GREEN,
		"visiblePolygonColor": Cesium.Color.GREEN.withAlpha(0.6),
		"hiddenColor": Cesium.Color.RED,
		"bodyHeight": 1.78, //用于做视域分析的人员身高
		"bodyColor": Cesium.Color.YELLOW,
	};
	var result = CesiumVisibleLine.drawCircles(options);
}

//地形夸张
function terrainEx(){
	$(".cesium-viewer").remove();
	initmap3D(initMapOptions);//初始化地图	
}