In this detailed post about the sweep-and-prune collision detection algorithm, the author shares their enthusiasm for this elegant solution by providing thorough explanations and interactive demos. The post starts with a simple naive approach to collision detection using a straightforward solution that tests every potential pair of objects for collision. However, this method becomes inefficient for a large number of objects due to its O(n^2) time complexity. The author then introduces how sorting objects by minimum x position can significantly reduce the number of tests needed and improve performance. This insightful approach leads to a more efficient collision detection algorithm with a reduced time complexity of O(n log n + m).
https://leanrada.com/notes/sweep-and-prune/