Cesium 从某个位置飞到某个位置

viewer.camera.flyTo({
  destination: new Cesium.Cartesian3(
    -3961951.575572026,
    3346492.0945766014,
    3702340.5336036095
  ),
  orientation: {
    direction: new Cesium.Cartesian3(
      0.8982074415844437,
      -0.4393530288745287,
      0.013867512433959908
    ),
    up: new Cesium.Cartesian3(
      0.12793638617798253,
      0.29147314437764565,
      0.9479850669701113
    ),
  },
  complete: function () {
    setTimeout(function () {
      viewer.camera.flyTo({
        destination: new Cesium.Cartesian3(
          -2304817.2435183465,
          -3639113.128132953,
          4688495.013644141
        ),
        orientation: {
          direction: new Cesium.Cartesian3(
            0.3760550186878076,
            0.9007147395506565,
            0.21747547189489164
          ),
          up: new Cesium.Cartesian3(
            -0.20364591529594356,
            -0.14862471084230877,
            0.9676978022659334
          ),
        },
        easingFunction: Cesium.EasingFunction.QUADRATIC_IN_OUT,
        duration: 5,
      });
    }, 1000);
  },
});