Chapter 1, Behaviors – Intelligent Movement, explores some of the most interesting movement algorithms based on the steering behavior principles developed by Craig Reynolds along with work from Ian Millington. They act as a foundation for most of the AI used in advanced games and other algorithms that rely on movement, such as the family of path-finding algorithms.

Chapter 2, Navigation, explores path-finding algorithms for navigating complex scenarios. It will include some ways to represent the world using different kinds of graph structures, and several algorithms for finding a path, each aimed at different situations.

Chapter 3, Decision Making, shows the different decision-making techniques that are flexible enough to adapt to different types of games, and robust enough to let us build modular decision-making systems.

Chapter 4, Coordination and Tactics, deals with a number of different recipes for coordinating different agents as a whole organism, such as formations and techniques that allow us make tactical decisions based on graphs, such as waypoints and influence maps.

Chapter 5, Agent Awareness, deals with different approaches of simulating sense stimuli on an agent. We will learn how to use tools that we already know to create these simulations, colliders, and graphs.

Chapter 6, Board Games AI, explains a family of algorithms for developing board-game techniques to create artificial intelligence.

Chapter 7, Learning Techniques, explores the field of machine learning. It will give us a great head start in our endeavor to learn and apply machine-learning techniques to our games.

Chapter 8, Miscellaneous, introduces new techniques and uses algorithms that we have learned about in previous chapters in order to create new behaviors that don't quite fit in a definite category.

The examples were tested and are provided using the latest version of Unity by the time of finishing this material, which is Unity 5.3.4f1. However, the book content started its development on Unity 5.1.2, so this is the minimum recommended version to work with.

This book is aimed at those who already have basic knowledge of Unity and are eager to get more tools under their belt in order to solve AI and gameplay-related problems.

In this book, you will find several headings that appear frequently (Getting ready, How to do it, How it works, There's more, and See also).

To give clear instructions on how to complete a recipe, we use these sections as follows:

In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "AgentBehaviour is the template class for most of the behaviors covered in the chapter."

A block of code is set as follows:
using UnityEngine;
using System.Collections;
public class Steering
{
    public float angular;
    public Vector3 linear;
    public Steering ()
    {
        angular = 0.0f;
        linear = new Vector3();
    }
}

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

using UnityEngine;
using System.Collections;

public class Wander : Face
{
    public float offset;
    public float radius;
    public float rate;
}

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