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Unreal Engine 4 AI Programming Essentials

You're reading from   Unreal Engine 4 AI Programming Essentials Create responsive and intelligent game AI using Blueprints in Unreal Engine 4

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Product type Paperback
Published in Mar 2016
Publisher
ISBN-13 9781784393120
Length 188 pages
Edition 1st Edition
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Authors (2):
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Jie Feng Jie Feng
Author Profile Icon Jie Feng
Jie Feng
Peter Newton Peter Newton
Author Profile Icon Peter Newton
Peter Newton
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Table of Contents (11) Chapters Close

Preface 1. Introduction to Game AI FREE CHAPTER 2. Creating Basic AI 3. Adding Randomness and Probability 4. Introducing Movement 5. Giving AI Choices 6. How Does Our AI Sense? 7. More Advanced Movement 8. Creating Patrol, Chase, and Attack AI 9. What Have We Learned? Index

Steering behavior: Flocking


Flocking is a steering behavior that combines Separation, Cohesion, and Alignment. Separation behavior avoids other nearby agents. Cohesion behavior keeps the agents in a group. Alignment behavior averages the forward direction by aligning with nearby agents.

What we will do here is replicate the steering behavior, flocking, in blueprint. We will also use UMG to aid the manipulation of weights for each behavior. Let's start now and create the variables we will need in this part of the chapter.

Flocking agents

We must first start off by creating the variables necessary to calculate individual behaviors. Then, we must add the results to normalize a final forward direction for our agent.

Let's focus on our RollingGameMode game mode and add the three new global variables we will have to use later in this chapter. In correlation to the three behaviors, we need to create GlobalAlignment, GlobalCohesion, and GlobalSeparation by performing the following steps:

  1. Open RollingGameMode...

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