Class Elevator

const controller = new ElevatorController({
  speed: 300 // 电梯运行速度，表示每秒位移的距离
  landings: {
     b1: new Vector3(0, 0, -3),
     f1: new Vector3(0, 0, 0),
     f2: new Vector3(0, 0, 3),
  }
})

const model = client.getEntityById('elevator_id');

const elevator = new Elevator({ model, signal: controller.signal });

controller.land('f1') // 通过控制器使电梯停靠 f1