Unity has been one of the most popular game engines for quite a while now, and it's probably the de facto game development tool for indie developers, not only because of its business model, which has a low entry barrier, but also because of its robust project editor, year-by-year technological improvements, and, most importantly, its ease of use and an ever-growing community of developers around the globe.
Thanks to Unity's heavy lifting behind the scenes (rendering, physics, integration, and cross-platform deployment, to name but a few) it's possible for us to focus on creating the AI systems that will bring our games to life, creating great real-time experiences in the blink of an eye.
The goal of this book is to give you the tools to build great AI, create better enemies, polish that final boss, or even build your own customized AI engine.
In this chapter, we will start by exploring some of the most interesting movement algorithms based on the steering behavior principles developed by Craig Reynolds, along with work from Ian Millington. These recipes are the stepping stones for most of the AI used in advanced games and other algorithms that rely on movement, such as the family of path-finding algorithms.
