Line of Sight Cesium Arcade Game

We’ve updated the Cesium arcade game with data from NTT Data so the game now features new cities and omni-line-of-sight calculations. Check out Hannah Bollar’s blog post about it, and catch us at a conference this year to play on the classic Cesium arcade machine.

Is there any information available on how the line of sight calculations were done? This is something that I'd love to add to my application!