With that, we complete our look at motion tracking with ARCore. As we learned, ARCore gives us the ability to track position and rotation or the pose of a device using feature identification correlated with the device's motion sensors. We then learned why it is important to track the position of a user when building AR apps with 3D sound. This taught us the difference between our audio and virtual (3D) scene and how to convert between references. We then extended our ability to track a user by setting up a Firebase Realtime Database and connected that to our AR app. By doing this, we could now track a single user or multiple users globally. Of course, we didn't have enough time here to build on this further. For now, we finished the app by drawing the user's travel path while the device moves around an area.

In the next chapter, we will jump back to working with Android (Java) and learn more about environmental understanding and various related 3D concepts, which is the next topic on the fundamental AR topics' list.