update：导弹机动发射案例的完善

src/examples/movingTarget/missileMobileLaunch/missileMobileLaunch-function.js

+let viewer = null;
+let cesiumInitialized = false;  // 判断是初始化还是触发导弹发射函数
+
 export function addMissileMobileLaunch(startLon, startLat, startHeight, endLon, endLat, endHeight, missileId) {
+    if (!cesiumInitialized) {
         const script = document.createElement('script');
         script.src = 'https://cesium.com/downloads/cesiumjs/releases/1.99/Build/Cesium/Cesium.js';
         script.onload = () => {
-        if (!window.CesiumInitialized) {
             window.Cesium.Ion.defaultAccessToken = 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJqdGkiOiI3Njg4ZWU5Yi1iZDhiLTRhYmUtOTRiYS04YjM5NmUwNjVmMDMiLCJpZCI6MjI3MzQ3LCJpYXQiOjE3MjA1MjA4Mjh9.E5XW4LnwgfVAaBC-znaYr61m4yK0-j2qEQhi9qwFFPE'
-            window.viewer = new Cesium.Viewer('cesiumContainer', {
+            viewer = new Cesium.Viewer('cesiumContainer', {
                 shouldAnimate: true  // 一开始就播放动画
             });
-            window.CesiumInitialized = true;
+            cesiumInitialized = true;
+            // addMissile(startLon, startLat, startHeight, endLon, endLat, endHeight, missileId);  // 一开始是否自动发射一次导弹
+        };
+        document.head.appendChild(script);
+
+        const link = document.createElement('link');
+        link.rel = 'stylesheet';
+        link.href = 'https://cesium.com/downloads/cesiumjs/releases/1.119/Build/Cesium/Widgets/widgets.css';
+        document.head.appendChild(link);
+    } else {
+        addMissile(startLon, startLat, startHeight, endLon, endLat, endHeight, missileId);  // 点击导弹发射按钮时触发
     }
+}
 
+/**
+ * startLon：导弹发射起点的的经度
+ * startLat：导弹发射起点的的纬度
+ * startHeight：：导弹发射起点的的高度
+ * endLon：导弹发射终点的的经度
+ * endLat：导弹发射终点的的纬度
+ * endHeight：导弹发射终点的高度
+ * missileId：导弹的id
+ */
+function addMissile(startLon, startLat, startHeight, endLon, endLat, endHeight, missileId) {
     const numPoints = 600; // 生成路径的点数
+    const cartesianData = generateArcPath(startLon, startLat, startHeight, endLon, endLat, endHeight, numPoints);  // 通过generateArcPath函数生成路径
 
-        const cartesianData = generateArcPath(startLon, startLat, startHeight, endLon, endLat, endHeight, numPoints);
+    const now = Cesium.JulianDate.toIso8601(viewer.clock.currentTime);  // 获取当前的时刻
     
+    // 构造导弹的cmzl数组
     var czml =
         [
             {
@@ -21,8 +47,7 @@ export function addMissileMobileLaunch(startLon, startLat, startHeight, endLon,
                 name: "Missile",
                 version: "1.0",
                 clock: {
-                        interval: "2019-08-28T04:00:00Z/2019-08-28T04:04:00Z",
-                        currentTime: "2019-08-28T04:00:00.00Z",
+                    currentTime: `${now}`,
                     multiplier: 1,
                     range: "LOOP_STOP",
                     step: "SYSTEM_CLOCK_MULTIPLIER"
@@ -30,18 +55,12 @@ export function addMissileMobileLaunch(startLon, startLat, startHeight, endLon,
             },
             {
                 id: `MissileLaunch${missileId}`,
-                    availability: "2019-08-28T04:00:00Z/2019-08-28T04:04:00Z",
-                    name: "MissileLaunch",
+                name: `MissileLaunch${missileId}`,
                 path: {
-                        show: [
-                            {
-                                interval: "2019-08-28T04:00:00Z/2019-08-28T04:04:00Z",
-                                boolean: true
-                            }
-                        ],
+                    show: true,
                     width: 1,
                     resolution: 86400,
-                        leadTime: 0,
+                    leadTime: 500,
                     trailTime: 500,
                     material: {
                         solidColor: {
@@ -55,72 +74,53 @@ export function addMissileMobileLaunch(startLon, startLat, startHeight, endLon,
                     show: true,
                     gltf: [
                         {
-                                interval: "2019-08-28T04:00:00Z/9999-12-31T23:59:59.9999999Z",
+                            interval: `${now}/9999-12-31T23:59:59.9999999Z`,
                             uri: "https://raw.githubusercontent.com/jinlinchao123/Cesium-assets/main/3Dmodel/MissileTwo.glb"
                         }
                     ],
                     minimumPixelSize: 128,
                     scale: 1,
                     runAnimations: false,
-                        articulations: {
-                            "SRBFlames Size": {
-                                epoch: "2019-08-28T04:00:00Z",
-                                number: [
-                                    0, 1,
-                                    60, 1,
-                                    61, 0,
-                                    1000, 0
-                                ]
-                            },
-                        }
                 },
                 position: {
                     interpolationAlgorithm: "LAGRANGE",
                     interpolationDegree: 5,
                     referenceFrame: "FIXED",
-                        epoch: "2019-08-28T04:00:00Z",
+                    epoch: `${now}`,
                     cartographicDegrees: cartesianData
                 },
                 orientation: {
                     "interpolationAlgorithm": "LINEAR",
                     "interpolationDegree": 1,
-                        "epoch": "2019-08-28T04:00:00Z",
+                    "epoch": `${now}`,
                     "velocityReference": "#position"  // 方向的参考属性，指向实体的位置属性
                 }
             }
         ]
 
-        var dataSourcePromise = window.viewer.dataSources.add(Cesium.CzmlDataSource.load(czml));
+    var dataSourcePromise = viewer.dataSources.add(Cesium.CzmlDataSource.load(czml));
 
     dataSourcePromise.then(function (dataSource) {
-            window.viewer.trackedEntity = dataSource.entities.getById(`MissileLaunch${missileId}`);
+        viewer.trackedEntity = dataSource.entities.getById('MissileLaunch0');
     }).catch(function (error) {
         console.error(error);
     });
-
-    };
-    document.head.appendChild(script);
-
-    const link = document.createElement('link');
-    link.rel = 'stylesheet';
-    link.href = 'https://cesium.com/downloads/cesiumjs/releases/1.119/Build/Cesium/Widgets/widgets.css';
-    document.head.appendChild(link);
 }
 
-// 路径生成函数，通过传入起点和终点的经纬和高度信息，生成路径数组
+// 路径生成函数，通过传入起点和终点的经纬度和高度信息，生成路径数组
 function generateArcPath(startLon, startLat, startHeight, endLon, endLat, endHeight, numPoints) {
     const startCartographic = new Cesium.Cartographic(Cesium.Math.toRadians(startLon), Cesium.Math.toRadians(startLat), startHeight);
     const endCartographic = new Cesium.Cartographic(Cesium.Math.toRadians(endLon), Cesium.Math.toRadians(endLat), endHeight);
 
-    const geodesic = new Cesium.EllipsoidGeodesic(startCartographic, endCartographic);
+    const geodesic = new Cesium.EllipsoidGeodesic(startCartographic, endCartographic);  // EllipsoidGeodesic 对象用于计算地球表面上两点之间的最短路径（测地线）
 
     const cartesianArray = [];
-    for (let i = 0; i <= numPoints; i++) {
-        const fraction = i / numPoints;
+    for (let i = 0; i <= numPoints; i++) {  // 使用循环生成路径上的点，点的数量由 numPoints 决定
+        const fraction = i / numPoints;  // fraction 表示当前点在起点和终点之间的比例
         const intermediateCartographic = geodesic.interpolateUsingFraction(fraction);
-        const intermediateHeight = Cesium.Math.lerp(startHeight, endHeight, fraction);
-        const intermediatePosition = Cesium.Cartographic.toCartesian(intermediateCartographic);
-        const cartographic = Cesium.Cartographic.fromCartesian(intermediatePosition);
+        const intermediateHeight = Cesium.Math.lerp(startHeight, endHeight, fraction);  // 计算当前点的地理坐标（弧度）
+        const intermediatePosition = Cesium.Cartographic.toCartesian(intermediateCartographic);  // 将地理坐标转换为笛卡尔坐标
+        const cartographic = Cesium.Cartographic.fromCartesian(intermediatePosition);  // 将笛卡尔坐标转换回地理坐标
         const lon = Cesium.Math.toDegrees(cartographic.longitude);
         const lat = Cesium.Math.toDegrees(cartographic.latitude);
         cartesianArray.push(i * (240 / numPoints), lon, lat, intermediateHeight);

src/views/ElementMap.js

@@ -50,7 +50,7 @@ export const elementMovingMap = {
     },
     导弹机动发射: {
         title: '导弹机动发射',
-        pngUrl: '/src/assets/MissileLaunch.png'
+        pngUrl: '/src/assets/MissileMobileLaunch.png'
     },
     火箭发射: {
         title: '火箭发射',