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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

Creating a Blackboard

Blackboards define the local variable space for Behavior Trees. These Blackboards can also sync with other instances of the same Blackboard. Blackboards can be created first because you'll find yourself modifying them often until you discover everything you need for your Behavior Tree.

We will create our Blackboard data first and then supply it to our Behavior Tree. Now, let's start! Here are the steps:

  1. Right-click on the Content folder and create a new folder named AI.

  2. Now, right-click inside the folder and scroll down to find Artificial Intelligence; then, click on Blackboard. Let's name this EnemyData.

  3. We will open EnemyData and then create two object variables to be used by Behavior Tree. Name the first one TargetActor and the next one CurrentRoute.

    Note

    In case you're using Enumeration, you can define the enumeration the same way we will define actors for these objects.

  4. Click on TargetActor and select the Key Type option in the drop-down menu. Then, change the Base Class...

CONTINUE READING
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Programming languages
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Unreal Engine 4 AI Programming Essentials
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