Unity Artificial Intelligence Programming - Fourth Edition

The behavior trees

Behavior trees are the other techniques used to represent and control the logic behind AI characters. They have become popular for the applications in AAA games such as Halo and Spore. Previously, we have briefly covered FSMs. FSMs provide a straightforward way to define the logic of an AI character, based on the different states and transitions between them. However, FSMs are considered challenging to scale and reuse. To support all the scenarios which we want our AI character to consider, we need to add many states and hardwire many transitions. So, we need a more scalable approach when dealing with more extensive problems. Behavior trees are a better way to implement AI game characters that could potentially become more ...