Optimizing the Collision Detection

Collision detection is the computational problem of detecting the intersection of two or more objects. While collision detection is most often associated with its use in video games and other physical simulations, it also has applications in robotics. In addition to determining whether two objects have collided, collision detection systems may also calculate time of impact, and report a contact manifold. Collision detection is one of the most challenging and complex parts of game programming and is the key area where performance is usually lost. To solve this there are a lot of data structures that eliminate unnecessary checks for collisions like quadtrees, octrees, BSP trees, grids etc.