🔥 Beacon Chain: Horizon Distance, Relay Spacing and Refraction (2D)

Side view of two signal towers on the curved Earth and a strip map of a whole beacon chain. Set the tower height, the bending of light in the air, the route length, how much of the maximum spacing you use and the delay at each tower, and see how far one fire can be seen, how far apart towers may stand, how many are needed and how fast a message crosses the route. The horizon distance, the grazing spacing, a full chain and a refracted ray are checked numerically, with four in-page numerical checks.

2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install