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  • Book Overview & Buying Unreal Engine 4 AI Programming Essentials
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Unreal Engine 4 AI Programming Essentials

Unreal Engine 4 AI Programming Essentials

By : Newton, Feng
2.6 (12)
Buy this Book
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Unreal Engine 4 AI Programming Essentials

Unreal Engine 4 AI Programming Essentials

2.6 (12)
By: Newton, Feng
Buy this Book

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 (11 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. Introduction to Game AI
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1. Introduction to Game AI
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Game Artificial Intelligence
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How AI affects the gaming experience
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Techniques and practices of game AI
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Unreal Engine 4 tools
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Summary
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2. Creating Basic AI
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2. Creating Basic AI
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Goal
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Setting up the project
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Using our new AIController class
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Reviewing the current progress
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Adding the challenge
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Traces
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The Enemy logic
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Adding the Enemy AI
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Summary
3
3. Adding Randomness and Probability
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3. Adding Randomness and Probability
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Introducing probability
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RandomStream in Unreal Engine 4
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The plan
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Adding Wander
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Fleeing and attacking
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Summary
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4. Introducing Movement
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4. Introducing Movement
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Overview
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Path Finding
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The A* algorithm
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Navigation Mesh
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The movement component
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Let's start!
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Waypoints
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Navigation
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Summary
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5. Giving AI Choices
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5. Giving AI Choices
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Behavior Tree in AIController
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Creating Behavior Tree
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Blackboard
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Designing Behavior Tree
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Summary
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6. How Does Our AI Sense?
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6. How Does Our AI Sense?
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Overview
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AI Sense
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AI Perception components
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State machines
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Pawn detection
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State transition
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Resetting the state
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Simulating and playing
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Summary
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7. More Advanced Movement
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7. More Advanced Movement
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Setting up the agents
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Viewing the agent
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Following the agent
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Steering behavior: Flocking
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Controlling behavior through UMG
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Summary
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8. Creating Patrol, Chase, and Attack AI
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8. Creating Patrol, Chase, and Attack AI
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Creating a Blackboard
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Mid-range attack
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Controllers
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Waypoints
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BT Composites, Task, Decorator, and Service
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Creating the logic
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Summary
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9. What Have We Learned?
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9. What Have We Learned?
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Creating basic AI
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Adding randomness and probability
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Introducing movement
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Giving our AI choice
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How does our AI sense?
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More advanced movement
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Creating patrol, chase, and attack AI
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Summary
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Index
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Index

Setting up the project

Let's open up Unreal Engine 4! We will begin with the first process of creating a new project.

Note

We will use Unreal Engine 4.6.0 throughout this book. The instructions may vary per version. We will present the idea behind our actions as we demonstrate them using Unreal Engine 4; so, hopefully, you will be able to translate the instructions as you see fit.

Here, we will use the Third Person Shooter template, which allows us to easily observe how the character moves in the environment. Perform the following steps:

  1. Go to the New Project window if you aren't there already:

  2. Select the Third Person blueprint project:

  3. Name your project as you see fit; I've named mine ImprovedAI. Then, hit Create Project in the lower-right corner of the window.

Environment

Even though we are using the Third Person blueprint template, these techniques can be used on other templates as well. You must adapt what you learn here. That being said, what you start to understand is that these techniques...

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Unreal Engine 4 AI Programming Essentials
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