Tunneling Physics: The Architecture of Continuous Collision Detection

In video games, if you shoot a high-speed sniper rifle at a thin wooden wall, the game engine faces a severe mathematical crisis. Standard physics engines only check the position of the bullet once per frame. If the bullet is moving so fast that it exists on one side of the wall in frame 1, and completely on the other side in frame 2, the engine assumes it never hit the wall at all. The bullet sim...