@cpluspatch @niconiconi @puniko anyways, this MD stuff isn't even the worst of it. All the video game physics engines in the world have a fairly simple core (Euler approximate acceleration, velocities, positions)... but what do you do when two objects collide? If you just calculate things the normal way as covered in Physics 101, contacts would be extremely unstable and things would randomly fly away (think goat simulator but worse; I know because I tried making a physics engine once...) There are just so many hacks used to approximate and apply contacts and friction, it's a wonder it all works.