cesium按路徑飛

https://blog.csdn.net/a873054267/article/details/86231494

Cesium.Ion.defaultAccessToken='你的token';
var view = new Cesium.Viewer('cesiumContainer',{
    baseLayerPicker:false,
    timeline:true,
    homeButton:false,
    fullscreenButton:false,
    infoBox:false,
    sceneModePicker:false,
    navigationInstructionsInitiallyVisible:false,
    navigationHelpButton:false,
    shouldAnimate : true
});
view.scene.globe.enableLighting = true;
let data = [];
data[0] = [{longitude:116.405419, dimension:39.918034, height:0, time:0},{longitude:116.2821, dimension:39.918145, height:0, time:40},{longitude:115.497402, dimension:39.344641, height:70000, time:100},{longitude:107.942392, dimension:29.559967, height:70000, time:280}, {longitude:106.549265, dimension:29.559967, height:0, time:360}];
data[1] = [{longitude:116.405419, dimension:39.918034, height:0, time:0},{longitude:117.034586, dimension:39.881202, height:0, time:40},{longitude:116.340088, dimension:38.842224, height:70000, time:100},{longitude:113.489176, dimension:23.464017, height:70000, time:280}, {longitude:113.262084, dimension:23.13901, height:0, time:360}];
data[2] = [{longitude:118.838979, dimension:32.073514, height:0, time:0},{longitude:118.438838, dimension:32.03777, height:0, time:40},{longitude:117.802406, dimension:31.91231, height:70000, time:100},{longitude:104.043645, dimension:35.993845, height:70000, time:280}, {longitude:101.807224, dimension:36.660972, height:0, time:360}];
// 起始時間
let start = Cesium.JulianDate.fromDate(new Date(2017,7,11));
// 結束時間
let stop = Cesium.JulianDate.addSeconds(start, 360, new Cesium.JulianDate());

// 設置始時鐘始時間
view.clock.startTime = start.clone();
// 設置時鐘當前時間
view.clock.currentTime = start.clone();
// 設置始終停止時間
view.clock.stopTime  = stop.clone();
// 時間速率，數字越大時間過的越快
view.clock.multiplier = 10;
// 時間軸
view.timeline.zoomTo(start,stop);
// 循環執行,即爲2，到達終止時間，重新從起點時間開始
view.clock.clockRange = Cesium.ClockRange.LOOP_STOP;

// view.camera.flyTo({
//     destination:Cesium.Cartesian3.fromDegrees(116.405419,32.073514,20000)
// })
for(let j=0; j<data.length; j++){
    let property = computeFlight(data[j]);
    //console.log(property)
    // 添加模型
    let planeModel = view.entities.add({
        // 和時間軸關聯
        availability : new Cesium.TimeIntervalCollection([new Cesium.TimeInterval({
            start : start,
            stop : stop
        })]),
        position: property,
        // 根據所提供的速度計算模型的朝向
        orientation: new Cesium.VelocityOrientationProperty(property),
        // 模型數據
        model: {
            uri: './Apps/SampleData/models/CesiumAir/Cesium_Air.glb',
            minimumPixelSize:128
        }
    });
}
/**
 * 計算飛行
 * @param source 數據座標
 * @returns {SampledPositionProperty|*}
 */
function computeFlight(source) {
    // 取樣位置 相當於一個集合
    let property = new Cesium.SampledPositionProperty();
    for(let i=0; i<source.length; i++){
        let time = Cesium.JulianDate.addSeconds(start, source[i].time, new Cesium.JulianDate);
        let position = Cesium.Cartesian3.fromDegrees(source[i].longitude, source[i].dimension, source[i].height);
        // 添加位置，和時間對應
        property.addSample(time, position);
    }
    return property;
}