设置要素闪烁：

//id-要素实体id，second-闪烁时间
SetEntityFlicker(id, second) {
    let entity = viewer.entities.getById(id);
    if (!entity) return;
    let x = 1;
    let flog = true;
    let fs = [];
    let callback = new Cesium.CallbackProperty(() => {
      if (flog) {
        x = x - 0.02;
        if (x <= 0) {
          flog = false;
        }
      } else {
        x = x + 0.02;
        if (x >= 1) {
          flog = true;
        }
      }
      return x >= 0.5;
    }, false);
    if (entity.billboard) {
      entity.billboard.show = callback;
      fs.push(entity.billboard);
    }
    if (entity.box) {
      entity.box.show = callback;
      fs.push(entity.box);
    }
    if (entity.corridor) {
      entity.corridor.show = callback;
      fs.push(entity.corridor);
    }
    if (entity.cylinder) {
      entity.cylinder.show = callback;
      fs.push(entity.cylinder);
    }
    if (entity.ellipse) {
      entity.ellipse.show = callback;
      fs.push(entity.ellipse);
    }
    if (entity.ellipsoid) {
      entity.ellipsoid.show = callback;
      fs.push(entity.ellipsoid);
    }
    if (entity.label) {
      entity.label.show = callback;
      fs.push(entity.label);
    }
    if (entity.model) {
      entity.model.show = callback;
      fs.push(entity.model);
    }
    if (entity.path) {
      entity.path.show = callback;
      fs.push(entity.path);
    }
    if (entity.plane) {
      entity.plane.show = callback;
      fs.push(entity.plane);
    }
    if (entity.point) {
      entity.point.show = callback;
      fs.push(entity.point);
    }
    if (entity.polygon) {
      entity.polygon.show = callback;
      fs.push(entity.polygon);
    }
    if (entity.polyline) {
      entity.polyline.show = callback;
      fs.push(entity.polyline);
    }
    if (entity.polylineVolume) {
      entity.polylineVolume.show = callback;
      fs.push(entity.polylineVolume);
    }
    if (entity.rectangle) {
      entity.rectangle.show = callback;
      fs.push(entity.rectangle);
    }
    if (entity.wall) {
      entity.wall.show = callback;
      fs.push(entity.wall);
    }

    setTimeout(function () {
      fs.forEach((f) => {
        f.show = true;
      });
    }, second * 1000);
  }

设置要素停止闪烁：

  SetEntityStopFlicker(id) {
    let entity = viewer.entities.getById(id);
    if (!entity) return;
    if (entity.billboard) {
      entity.billboard.show = true;
    }
    if (entity.box) {
      entity.box.show = true;
    }
    if (entity.corridor) {
      entity.corridor.show = true;
    }
    if (entity.cylinder) {
      entity.cylinder.show = true;
    }
    if (entity.ellipse) {
      entity.ellipse.show = true;
    }
    if (entity.ellipsoid) {
      entity.ellipsoid.show = true;
    }
    if (entity.label) {
      entity.label.show = true;
    }
    if (entity.model) {
      entity.model.show = true;
    }
    if (entity.path) {
      entity.path.show = true;
    }
    if (entity.plane) {
      entity.plane.show = true;
    }
    if (entity.point) {
      entity.point.show = true;
    }
    if (entity.polygon) {
      entity.polygon.show = true;
    }
    if (entity.polyline) {
      entity.polyline.show = true;
    }
    if (entity.polylineVolume) {
      entity.polylineVolume.show = true;
    }
    if (entity.rectangle) {
      entity.rectangle.show = true;
    }
    if (entity.wall) {
      entity.wall.show = true;
    }
  }