//旋转

viewer.clock.multiplier = 200;
viewer.clock.shouldAnimate = true;
let previousTime = viewer.clock.currentTime.secondsOfDay;
function onTickCallback() {
    const spinRate = 1;
    const currentTime = viewer.clock.currentTime.secondsOfDay;
    const delta = (currentTime - previousTime) / 1000;
    previousTime = currentTime;
    viewer.scene.camera.rotate(Cesium.Cartesian3.UNIT_Z, -spinRate * delta);
}
viewer.clock.onTick.addEventListener(onTickCallback);

//监听点击事件，当点击地图时停止旋转

const handler = new Cesium.ScreenSpaceEventHandler(viewer.scene.canvas);
handler.setInputAction((click)=> {
    viewer.clock.onTick.removeEventListener(onTickCallback);
}, Cesium.ScreenSpaceEventType.LEFT_DOWN);