�单击事件
            mouseEventManager.registerMouseEvent('LEFT_CLICK', function(e) {
                //屏幕坐标转笛卡尔坐标
                var cartesian = webGlobe.viewer.getCartesian3Position(e.position, cartesian);
                var cartographic = Cesium.Cartographic.fromCartesian(cartesian);

                var lng = Cesium.Math.toDegrees(cartographic.longitude);
                pointArray.push(lng);
                allPoint.push(lng);

                var lat = Cesium.Math.toDegrees(