Book Image

Practical Game AI Programming

By : Micael DaGraça
Book Image

Practical Game AI Programming

By: Micael DaGraça

Overview of this book

The book starts with the basics examples of AI for different game genres and directly jumps into defining the probabilities and possibilities of the AI character to determine character movement. Next, you’ll learn how AI characters should behave within the environment created. Moving on, you’ll explore how to work with animations. You’ll also plan and create pruning strategies, and create Theta algorithms to find short and realistic looking game paths. Next, you’ll learn how the AI should behave when there is a lot of characters in the same scene. You'll explore which methods and algorithms, such as possibility maps, Forward Chaining Plan, Rete Algorithm, Pruning Strategies, Wall Distances, and Map Preprocess Implementation should be used on different occasions. You’ll discover how to overcome some limitations, and how to deliver a better experience to the player. By the end of the book, you think differently about AI.
Table of Contents (17 chapters)
Title Page
About the Author
About the Reviewer
Customer Feedback
Navigation Behavior and Pathfinding
AI Planning and Collision Avoidance

Implementing vision awareness

Before starting out with the tactics, we will take a look at how we can implement an awareness system into our characters.

Let's start by implementing a vision awareness into our game character. The idea is to simulate the human vision, where we can see very good at close range and not so good when something is really far away. Many games have adopted this system and they all have differences, some have a more complex system while others have a basic one. The basic example can be found especially on a more juvenile adventure game such as Zelda - Ocarina of Time for example, where the enemies will only appear or react when you reach a certain trigger zone as shown in the following screenshot:

For example, in this situation if the player goes back and exits the enemy trigger zone, the enemy will stay in an idle position, even if he is clearly able to see the player. This is a basic system of awareness and we can include it in the vision section.

Meanwhile, other...