define([], function () {
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var thisoption = {};
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function Flyobj() {
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function ctsn3ToDegree(cartesian3) {
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let cartographic = AppScope.Viewer.scene.globe.ellipsoid.cartesianToCartographic(cartesian3);
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return {
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lng: Cesium.Math.toDegrees(cartographic.longitude),
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lat: Cesium.Math.toDegrees(cartographic.latitude),
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alt: cartographic.height
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};
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}
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function getHeadingRadian(point1, point2) {
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return Math.atan2(point2.lng - point1.lng, point2.lat - point1.lat);
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}
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/**
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* 空间两点距离计算函数 单位 米
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**/
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function getSpaceDistance(positions) {
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var distance = 0;
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var deg;
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for (var i = 0; i < positions.length - 1; i++) {
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deg = positions[i];
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var point1cartographic = Cesium.Cartographic.fromDegrees(deg.longitude, deg.latitude, deg.height);
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deg = positions[i + 1];
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var point2cartographic = Cesium.Cartographic.fromDegrees(deg.longitude, deg.latitude, deg.height);
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//根据经纬度计算出距离
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var geodesic = new Cesium.EllipsoidGeodesic();
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geodesic.setEndPoints(point1cartographic, point2cartographic);
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var s = geodesic.surfaceDistance;
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//console.log(Math.sqrt(Math.pow(distance, 2) + Math.pow(endheight, 2)));
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//返回两点之间的距离
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s = Math.sqrt(Math.pow(s, 2) + Math.pow(point2cartographic.height - point1cartographic.height, 2));
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distance = distance + s;
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}
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return distance;
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}
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var frame_obj={};//上层变量 防止内存溢出
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/**
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* 帧处理者
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**/
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var frame_handler = function (clock) {
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frame_obj.thistime = new Date().getTime();
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frame_obj.timespan = 0;
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frame_obj.nexttime = 0.001;
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frame_obj.timespan = (frame_obj.thistime - AppScope.FlyRoute.timeclock) / 1000;
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frame_obj.lasttime = frame_obj.lasttime + frame_obj.timespan;
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if (frame_obj.lasttime > frame_obj.timesum) {
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frame_obj.lasttime = 0;
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}
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frame_obj.nexttime = frame_obj.lasttime + frame_obj.timespan * 2;
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if (frame_obj.nexttime > frame_obj.timesum) {
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frame_obj.nexttime = frame_obj.timesum;
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}
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frame_obj.point = frame_obj.spline.evaluate(frame_obj.lasttime);
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frame_obj.point2 = frame_obj.spline.evaluate(frame_obj.nexttime);
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frame_obj.heading = getHeadingRadian(ctsn3ToDegree(frame_obj.point), ctsn3ToDegree(frame_obj.point2));
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frame_obj.pitch = Cesium.Cartesian3.angleBetween(frame_obj.point, frame_obj.point2)-Math.PI/12;
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AppScope.Viewer.camera.lookAt(frame_obj.point, new Cesium.HeadingPitchRange(frame_obj.heading, frame_obj.pitch, 100.0));
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AppScope.FlyRoute.timeclock = frame_obj.thistime;
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}
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/**
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* 创建路线
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**/
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function CreateFlyRoute(option) {
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option.timeline = [];
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option.timeline.push(0);
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option.pointline = [];
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option.timesum = 0;
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option.pointline.push(Cesium.Cartesian3.fromDegrees(option.points[0], option.points[1], option.points[2]+option.add_height));
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var len = option.points.length - 3;
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for (var index = 0; index < len; index += 3) {
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let length = getSpaceDistance([{
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longitude: option.points[index],
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latitude: option.points[index + 1],
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height: option.points[index + 2]+option.add_height
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},
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{
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longitude: option.points[index + 3],
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latitude: option.points[index + 4],
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height: option.points[index + 5]+option.add_height
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}]);
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let t = length / option.speed;//计算速度
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option.timesum += t;
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option.timeline.push(option.timesum);
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option.pointline.push(Cesium.Cartesian3.fromDegrees(option.points[index + 3], option.points[index + 4], option.points[index + 5]+option.add_height));
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}
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option.lasttime = option.timesum;
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option.spline = new Cesium.CatmullRomSpline({
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times: option.timeline,
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points: option.pointline
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});
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//航向
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option.hpRange = new Cesium.HeadingPitchRange();
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option.fixedFrameTransforms = Cesium.Transforms.localFrameToFixedFrameGenerator('north', 'west');
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}
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var fly_obj = {};
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fly_obj.routes = [];
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fly_obj.stop = function () {
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if(AppScope.FlyRoute.thisRoute!=undefined&&AppScope.FlyRoute.thisRoute.flyline!=undefined){
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AppScope.Viewer.entities.remove(AppScope.FlyRoute.thisRoute.flyline);
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AppScope.FlyRoute.thisRoute.flyline = undefined;
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}
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AppScope.Viewer.clock.onTick.removeEventListener(frame_handler);
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AppScope.Viewer.camera.lookAtTransform(Cesium.Matrix4.IDENTITY);
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};
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fly_obj.ispause = false;
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fly_obj.pause = function () {
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if(fly_obj.ispause){
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fly_obj.ispause = false;
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AppScope.Viewer.clock.onTick.addEventListener(frame_handler);
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}else{
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fly_obj.ispause = true;
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AppScope.Viewer.clock.onTick.removeEventListener(frame_handler);
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}
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};
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fly_obj.load = function (arr) {
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$.ajax({
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url: "data/flyroute.json",
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type: "GET",
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dataType: "json",
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success: function (data) {
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if (data.length == undefined) return;
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AppScope.FlyRoute.routes=[];
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data.forEach(item => {
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CreateFlyRoute(item);
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AppScope.FlyRoute.routes.push(item);
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});
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}
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});
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};
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fly_obj.start = function () {
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this.stop();
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fly_obj.ispause = false;
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AppScope.FlyRoute.thisRoute = AppScope.FlyRoute.routes[0];
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var points = [];
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for(var i=0;i<AppScope.FlyRoute.thisRoute.timesum;i+=0.1){//航线线条的平滑度(与飞行无关)
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points.push(AppScope.FlyRoute.thisRoute.spline.evaluate(i));
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}
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AppScope.FlyRoute.thisRoute.flyline = AppScope.Viewer.entities.add({
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name : '航线',
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polyline : {
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positions : points,
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width : 0.4,
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material : Cesium.Color.DARKSLATEBLUE,
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//clampToGround : true
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}
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});
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AppScope.FlyRoute.thisRoute.lasttime = AppScope.FlyRoute.thisRoute.timesum;
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AppScope.FlyRoute.timeclock = new Date().getTime();
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frame_obj = AppScope.FlyRoute.thisRoute;
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AppScope.Viewer.clock.onTick.addEventListener(frame_handler);
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}
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return fly_obj;
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}
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if (AppScope.FlyRoute == undefined) {
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AppScope.FlyRoute = Flyobj();
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}
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thisoption.ShowTool = function () {
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layer.closeAll();
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var html1 = "<div style='margin:6px'><input type='button' class='cesium-button' value='开始飞行' onclick='AppScope.FlyRoute.start();'><input type='button' class='cesium-button' value='暂停\\继续' onclick='AppScope.FlyRoute.pause();'><input class='cesium-button layui-layer-close' type='button' value='退出飞行'/></div>";
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$('.cesium-viewer-animationContainer').hide();
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layer.closeAll();
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layer.open({
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type: 1,
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title: "飞行功能",
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area: ['280px', '80px'],
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shade: 0,
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offset: ['100px', 'calc(100% - 380px)'],
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content: html1,
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zIndex: layer.zIndex,
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success: function (layero) {
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layer.setTop(layero);
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AppScope.FlyRoute.load();
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},
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end: function () {
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AppScope.FlyRoute.stop();
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}
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});
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}
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return thisoption;
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});
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