Not exactly - a shortest path algorithm would lead to the monsters "anticipating" the player coming around the obstacle and cutting them off. The algorithm is

Not exactly - a shortest path algorithm would lead to the monsters "anticipating" the player coming around the obstacle and cutting them off. The algorithm is summarized in the article as: "When an enemy enters the Chase state it tries to raycast to the player and if nothing is in the way - chase em! If something is in the way, it goes through the scent trail in order and tries to raycast to each scent until it can see one, then - chase it!" With complex geometry, this will frequently lead to a non-optimal route, and is probably more fun to play against.