Work on the software and content for the game continues apace. Most recently we’ve been working on a 3D compass which will be a key element of the ‘treasure hunt’ nature of the game. We wanted to create a clean design to be easy to understand, but still in keeping with the historic theme. We were inspired by this artefact from the National Maritime Museum at Greenwhich which is from the century following the battle. It has a rotating disc of the form reportedly found on nautical compasses right back to the medieval period. We elaborated this concept with a 3D effect for the cardinal directions (North, South, East, West) and inter-cardinal directions (North-east, South-east, etc), but used minimal surface decoration to keep a clean feel and avoid confusing players of the game!

Compass in Stereo

Compass images for left and right eyes.

The image above shows a draft of the compass with separate images to be rendered for left and right eye. You can see that the images are subtly different which is how we create the illusion of a three-dimensional object when seen on the smart glasses.

The compass is animated by data from sensors on board the smart glasses so that it behaves like a real compass. Here we found an unexpected quirk of the sensor orientation on our chosen smart glasses. In case it’s useful to other developers we’ve put some comments about this in a separate technical note here.

A requirement of the game is that the players are directed by the compass to the next location of interest. As shown in the image above, we’re doing this graphically by highlighting the segment of the disc in the required direction; and with text naming the required direction, which floats next to the disc.