The Fastest Gravity Algorithm You’ve Never Heard Of (And Why Your Physics Engine Is Stuck in the Stone Age)
The Fast Multipole Method achieves O(N) complexity for N-body gravity simulations, shattering the long-held belief that accurate physics engines must be O(NĀ²). A new zero-dependency open-source library makes this algorithm accessible to game developers and simulation enthusiasts, enabling real-time planetary dynamics with thousands of bodies.