ABSTRACT
The technology is an extension to the traditional behavior tree (BT) model that allows developers to dynamically modify the priorities of a BT based on some high-level logic; the new layer works in a plug-and-play fashion, which means it can be easily removed, leaving the base behavior untouched. This greatly reduces the inherent risk of changes. Video games are a type of software that benefits from changes, and prototyping is necessary to develop fun. Building such experiences is a joint effort between programmers and designers. The popularity of BTs has been growing steadily in the last 10 years and they have become a fundamental part of many games. BTs are data-driven structures that can be easily represented in the form of a tree or graph. Nodes in a BT can be leaves or branches. Leaf nodes represent either an action or a conditional check, that is, nodes with a direct communication to the world.
