Book Image

Unreal Engine 4 AI Programming Essentials

By : Jie Feng, Peter Newton
Book Image

Unreal Engine 4 AI Programming Essentials

By: Jie Feng, Peter Newton

Overview of this book

Unreal Engine is a powerful game development engine that provides rich functionalities to create 2D and 3D games. Developers have the opportunity to build cross-platform mobile and desktop games from scratch. This book will show you how to apply artificial intelligence (AI) techniques to your Unreal project using blueprints as your scripting language. You will start with an introduction to AI, and learn how it is applied to gaming. Then you'll jump right in and create a simple AI bot and apply basic behaviors to allow it to move randomly. As you progress, you'll find out how to implement randomness and probability traits. Using NavMesh, you will impart navigation components such as character movement, MoveTo nodes, settings, and world objects, and implement Behavior Trees. At the end of the book, you will troubleshoot any issues that might crop up while building the game.
Table of Contents (16 chapters)
Unreal Engine 4 AI Programming Essentials
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Preface
Index

Introducing probability


We know an event will occur, but how often will it occur? This is how we can quantify probability, and this is what we will use to control the frequency of an outcome. So, let's say we flip a quarter. The event we know will occur is heads (H), but it can still land on tails (T). So, the way we would write the probability of landing on heads is P (H) =?

At this point, we know that heads will occur, although we still don't know how often it will occur. To understand this, we must first get the number of possible outcomes that meet our conditions, which is 1 for heads. Then, we must get the number of events that are equally likely to occur, which is 2. So, now we need to put this in the equation for probability:

# of possible met conditions / # of equality likely outcomes

If we do some basic math and break it down further, we will have 50%:

P (H) = 1/2 = 50%

So what this says is, if you flipped a coin a million or even a billion times, the more the number of times you...