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Navigation

In this chapter, we will cover the following recipes:

Representing the world with grids
Representing the world with points of visibility
Representing the world with a self-made navigation mesh
Finding your way out of a maze with DFS
Finding the shortest path in a grid with BFS
Finding the shortest path with Dijkstra
Finding the best-promising path with A*
Improving A* for memory: IDA*
Planning navigation in several frames: time-sliced search
Smoothing a path

Key benefits

Explore different algorithms for creating decision-making agents that go beyond simple behaviors and movement

Discover the latest features of the NavMesh API for scripting intelligent behaviour in your game characters

Create games that are non-predictable and dynamic and have a high replayability factor

Description

Interactive and engaging games come with intelligent enemies, and this intellectual behavior is combined with a variety of techniques collectively referred to as Artificial Intelligence. Exploring Unity's API, or its built-in features, allows limitless possibilities when it comes to creating your game's worlds and characters. This cookbook covers both essential and niche techniques to help you take your AI programming to the next level. To start with, you’ll quickly run through the essential building blocks of working with an agent, programming movement, and navigation in a game environment, followed by improving your agent's decision-making and coordination mechanisms – all through hands-on examples using easily customizable techniques. You’ll then discover how to emulate the vision and hearing capabilities of your agent for natural and humanlike AI behavior, and later improve the agents with the help of graphs. This book also covers the new navigational mesh with improved AI and pathfinding tools introduced in the Unity 2018 update. You’ll empower your AI with decision-making functions by programming simple board games, such as tic-tac-toe and checkers, and orchestrate agent coordination to get your AIs working together as one. By the end of this book, you’ll have gained expertise in AI programming and developed creative and interactive games.

What you will learn

Create intelligent pathfinding agents with popular AI techniques such as A and Ambush

Implement different algorithms for adding coordination between agents and tactical algorithms for different purposes

Simulate senses so agents can make better decisions, taking account of the environment

Explore different algorithms for creating decision-making agents that go beyond simple behaviors and movement

Create coordination between agents and orchestrate tactics when dealing with a graph or terrain

Implement waypoints by making a manual selector

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Frequently bought together

Unity 2018 Artificial Intelligence Cookbook

€36.99

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Total € 119.97

Fernando Lovera Oct 12, 2018

I had a lot of fun reading this book, very interesting and simple explained, which shows good understanding of the author about these subjects.

Amazon Verified review

Brian Feb 19, 2019

I simply can not recommend this book, especially for the price. It may be worth buying used for around $15 to serve as a code base. For a cookbook, it does a very poor job of explaining the specific problem that a particular chunk of code is designed to solve. This is especially true at the start of the book. I found myself reading through a lot of code that was just thrown at me with very little introduction... wondering what type of game world and what specific problem in that game world is this code designed to address. Usually cookbooks are organized by more specific objectives. The other side of the code block (where one normally expects an explanation of the code, reasoning behind why something was done this way or that, and how it may need to be modified to fit certain situations) was equally barren. With all of that said, there is some good example code in there if you are willing to do most of the hard work yourself in understanding how to implement it in your specific game project (hence the two star rating as opposed to one). But that is the key problem, example code and basic patterns can be found for free all over the Internet for free. A book is supposed to help to clarify things, put it in the clear context of an overarching theme, and help the reader adapt things to match their specific needs.

Gabriel Campbell Mar 09, 2019

this guy just copy pasted the AI chapters he wrote for the Complete Unity 2018 Game Development book, which is about the cost of this book alone. Or maybe it went the other direction Either way, just getting that book is a much better deal. His examples are all pretty basic stuff, and for an AI focused book really doesn't get into anything advanced or useful on the subject. His examples are mostly without any greater context, and often without full implementation. There will be a lot of code samples where the method is just empty except one comment that says "//TODO implement your code here". Most of the book is taken up with re-implementing your own version of state machines, agent steering and the like, rather than making use of existing stuff in Unity that would let you jump into more advanced ideas. It could be useful if you are very new to both c# and unity and want a basic intro to the idea behind navigation and FSMs and so on, but even then there are better, free ai tutorials online.

Gir the Game Designer Feb 23, 2020

Doesn't explain anything in detail and turns out that you can get the same tech done with Behaviour Designer on the Asset Store

Ariadne Feb 25, 2019

I bought this book when there was just one (positive) review for it, and I wish I hadn’t. Each chapter consists of pages of code with no description about what to do with the scripts to make a working project. I downloaded the sample files and tried to run the project for the first chapter. It did run, but only because there are lots of other scripts in the project that are not mentioned in the book.The download itself is just a dump of all the scripts and prefabs for the whole book which makes it extremely difficult to work out which parts are needed for which chapter.It is a very discouraging book, not for a beginner or for anybody really. I am not new to AI (I have a MSc and a PhD in the subject) and I have made several Unity projects using other books and online resources, but this book has defeated me. I feel frustrated, disappointed and cheated and I cannot recommend this book.

Unity 2018 Artificial Intelligence Cookbook: Over 90 recipes to build and customize AI entities for your games with Unity , Second Edition

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