The Internet is full of videos, where flocks of drones fly beautifully and smoothly, simultaneously performing various tricks. So what? They in fact rely on the data received on GPS, but what to do when no GPS can be used? Engineers of the

The HoloLens headset from Microsoft is too cumbersome and expensive, and the Magic Leap, although finally appearing in public, still does not fight with countless competitors because of their absence, although the very idea of ​​augmented reality is predicted by