libfpv: Modding an FPV Drone into Any Game

About

libfpv is a C library that adds a flying FPV quadcopter to a game. It runs real Betaflight firmware on its own simulation thread, reads a radio or gamepad, and gives the game the drone's pose, cameras, OSD, and motor sound to draw. The game supplies collision geometry and rendering. The linked blog post presents it with demos in Super Mario 64 and GTA IV, including a browser build of Mario 64.