Shared space

The HoloLens uses a concept known as spatial anchors to map out the environment. These anchors are reference points used by the device to build a coordinate system and used to position holograms. Using multiple anchors allows the device to track large areas. These anchors can also be persisted and shared; sharing an anchor, along with its supporting understanding of the environment, is what we will cover in this section. 

Just to recap, our goal is to allow multiple users to review a design outside the screen. To enable this, we need to have a single user place the hologram and share this location with other users that join, such that all users are viewing the hologram from the same place. 

We are already placing the hologram, ...

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