Mastering Unity 5.x: Create amazing games with brilliant game play features using Unity 5.x

Table of Contents

Mastering Unity 5.x

Credits

About the Author

Acknowledgment

About the Reviewer

www.PacktPub.com

Why subscribe?

Customer Feedback

Preface

What this book covers  

What you need for this book 

Who this book is for 

Conventions

Reader feedback

Customer support

Downloading the example code 

Downloading the color images of this book 

Errata

Piracy

Questions

1. Preparation and Asset-Configuring

Getting clear on design

Target Platforms

Intended audience

Genre

Game mode

Game objective

Asset preparation

Meshes - work only with good topology

Meshes - minimize polygon count

Meshes - simulating bump details without geometry

Meshes - minimize UV seams

Meshes - export as FBX

Meshes - use meters scale (metric)

Textures - never use lossless compression

Textures - power of 2 sizes

Textures - alpha textures

Asset importing for Dead Keys

Importing textures

Importing meshes

Importing animations

Importing audio

Configuring materials

Summary

2. Level Design and Structure

Setting the scene with a skybox

Level building - modular construction sets

Level building - organization and structure

Level design - tips and tricks

Objective and feedback

Narrative

Believability and convenience

Atmosphere and aesthetic

Simplicity and reuse

Level lighting - preparation

Baked lighting

Dynamic lighting

Precomputed global illumination

Getting started with lightmapping

Baking lightmaps - resolution and size

Baking lightmaps - details

Light Probes

Lighting FAQ

Navigation mesh

Occlusion Culling

Creating a player camera

Particle systems

Music and audio

Summary

3. Player Controls - Movement

Player movement

Zombie combat

Creating player waypoints

Animating the camera

Configuring an animator graph

Working with animation - creating the navigator

Customizing and changing MonoDevelop

Singletons

Comments

Connecting to the navigator component

Comments

Navigator GUI

Input axes

The canvas

The button

Coding button behavior

Comments

Creating player death

Comments

Summary

4. Player Controls - Typing and Health

Word combat

Creating a word list

Using Visual Studio Code

Creating a WordList class

Comments

Comments

Matching words

Comments

The Typer object

Progressing with the Typer class

Comments

Health and damage

Comments

Comments

Damage and feedback

Player score

Comments

Bonus items

Comments

Summary

5. Enemies and Artificial Intelligence

Configuring the zombie character

Getting started with the zombie Prefab

Planning the zombie Artificial Intelligence

Comments

Developing state structure

Comments

Developing an NPC Animator Controller

Developing the Idle state

Comments

Developing the Chase state

Comments

Developing the Attack state and more

Comments

Developing the Dead state

Zombies and text input

Comments

Zombies and the Typer class

Comments

Comments

Activating enemies and camera paths

Working with Play mode

Summary

6. Project Management and Version Control

Project Management

Research, design, and work assessment

Workload plan

Task status

Risk Analysis

Resources and skills needed

Testing plan

Applied Project Management using Trello

Collaboration with cloud storage

Version control using Git

Getting started with Git and GitKraken

Commits and branches

Forwards and backwards with Git

Configuring Unity for version control

Reverting and discarding

Branches and branching

Conflicts and resolving

Git and the Web

Pushing and pulling

Cloning

Summary

7. Persistent Data - Load and Save Game States

Data Serialization

Player preferences - saving data

Player preferences - loading data

Player preferences - INI files

Comments on iniParser.cs

Saving data - XML files

Comments

Saving data - JSON files

Comments

Saving data - binary files

Comments

Saving data for Dead Keys

Comments

Summary

8. Performance, Optimization, Mobiles, and More

Stats and performance

Profiler and performance assessment

Optimization tips and tricks

Strings and comparisons

Beware of functions in disguise

Debug cleaning

Optimizing build size

Getting started with mobile development

Moving forwards with mobile development

Building for Android

Building for VR (Virtual Reality)

Summary

Mastering Unity 5.x

Mastering Unity 5.x

Copyright © 2017 Packt Publishing

All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews.

Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the author, nor Packt Publishing, and its dealers and distributors will be held liable for any damages caused or alleged to be caused directly or indirectly by this book.

Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information.

First published: January 2017

Production reference: 1200117

Published by Packt Publishing Ltd.

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ISBN 978-1-78588-074-2

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Credits

About the Author

Alan Thorn is a multidisciplinary game developer, author, and educator with industry experience of 17 years. He makes games for PC desktop, mobile, and VR. He founded Wax Lyrical Games​ and created the award-winning Baron Wittard: Nemesis of Ragnarok game, working as designer, programmer, and artist. He has written twenty-three technical books on game development and presented 19 video training courses. These cover game-play programming, Unity development, 3D modeling, and animation. He has worked in games education as a senior lecturer for Teesside University, a lead teacher for Uppingham School, and a visiting lecturer for the London South Bank University. He is currently the head of department for Games Design and Development at the National Film and Television School.

Acknowledgment

This book would not have been possible if it hadn’t been for the valuable help of many people. I would like to thank all my friends and family, and also the team at Packt. This includes Onkar Wani and Larissa Pinto.

About the Reviewer

Francesco Sapio obtained his computer science and control engineering degree from Sapienza University of Rome, Italy, with a couple of semesters in advance, scoring summa cum laude. He is currently working on a master of science in engineering in artificial intelligence and robotics at the same university.

He is a Unity 3D and Unreal expert, a skilled game designer, and an experienced user of the major graphics programs. He developed Game@School (Sapienza University of Rome) an educational game for high school students to learn some concepts of physics, and Sticker Book (Dataware Games), a cross-platform series of games for kids. In addition, he worked as a consultant for the (successfully funded by Kickstarter) game Prosperity – Italy 1434 (Entertainment Game Apps, Inc) and for the open online collaborative ideation system titled Innovoice (Sapienza University of Rome). Moreover, he has been involved in different research projects, such as Belief Driven Pathfinding (Sapienza University of Rome), which is a new technique of pathfinding in video games that was presented as a paper at the DiGRA-FDG Conference 2016 and perfekt.ID (Royal Melbourne Institute of Technology), which included developing a recommendation system for games.

He is an active writer on the topic of game development. Recently, he authored the book Unity UI Cookbook, Packt which teaches readers how to develop exciting and practical user interfaces for games within Unity, and a short e-guide, What do you need to know about Unity, Packt. In addition, he co-authored the book Unity 5.x 2D Game Development Blueprints, Packt. Furthermore, he has also been a reviewer for the following books: Game Physics Cookbook, Unity 5.x by Example, and Unity Game Development Scripting, all from Packt.

Finally, Francesco loves math, philosophy, logic, and puzzle solving, but most of all, creating video games, thanks to his passion for game designing and programming.

You can connect with him at www.francescosapio.com.

I’m deeply thankful to my parents for their infinite patience, enthusiasm, and support throughout my life. Moreover, I’m thankful to the rest of my family, in particular to my grandparents, since they have always encouraged me to do better in my life with the Latin expressions Ad maiora and Per aspera ad astra.

Finally, a huge thanks to all the special people around me whom I love, in particular to my girlfriend—I’m grateful for all of your help in everything.

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This book is dedicated to Mark Lovering, a gentleman and a scholar.

Preface

Greetings and welcome to Mastering Unity 5.x! This book teaches Unity initially from a beginner's perspective, and then helps you develop that knowledge in a particular way. Specifically, it develops a general, overarching mastery, in which you’ll learn Unity like a seasoned indie developer' capable of turning your hand to pretty much any department and feature set within Unity. The following chapter outline explains, in detail, the full range of features that we’ll explore. However, the central aim of this book is to make you versatile and fully competent with Unity, capable of encountering a problem and solving it in the language of Unity’s feature set. In this book, we’ll concentrate, for the most part, on a practical example; we’ll build a first-person combat game across multiple chapters, which will test your typing skills in more ways than one. So, let’s go!

What this book covers  

Chapter 1, Preparation and Asset-Configuring, outlines the project we’ll be focusing on in the book. It specifies tips and tricks to import assets optimally, configure assets, and best-practice workflows to keep your project organized.

Chapter 2, Level Design and Structure, gets you started with designing and building the main game level inside Unity, exploring interesting level design ideas as well as critically important practical considerations.

Chapter 3, Player Controls – Movement, explores player controls, that is, how player input drives and controls the main game camera.

Chapter 4, Player Controls – Typing and Health, focuses on creating a combat mechanic that damages enemies; every character that can be damaged needs health, representing the total amount of damage a character may sustain.

Chapter 5, Enemies and Artificial Intelligence, looks at how to achieve intelligent and believable enemy behavior using AI. By using AI, enemies will move around the level seeking the player and will attack when in range.

Chapter 6, Project Management and Version Control, looks at ways to optimize the game development workflow by using Version Control software. This keeps a record of your project as it moves through all its iterations.

Chapter 7, Persistent Data – Load and Save Game States, focuses on the different saving methods available with Unity as players often want their in-game progress saved, allowing them to resume where they left off previously every time they start a new play session.

Chapter 8, Performance, Optimization, Mobiles, and More, explores a selection of related topics. Specifically, it will explore how to improve the performance of your games through optimization, how to prepare your games for mobile deployment, and how to prepare generally for VR development.

What you need for this book 

To read this book effectively, and to complete the tasks within it, you need only two things: first, the Unity 5 software (which you can get for free from https://unity3d.com) and second, the determination to succeed! Using only these tools, you can learn to produce great games in Unity.

Who this book is for 

If you are a Unity developer who now wants to develop and deploy interesting games by leveraging the new features of Unity 5.x, then this is the book for you. A basic knowledge of C# programming is assumed.

Conventions

In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: This should be dragged and dropped into the music folder.

A block of code is set as follows:

//Collection of combat sounds

public AudioClip[] CombatSounds;

New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: From the Command Palette, choose Change Case Lower.

Note

Warnings or important notes appear in a box like this.

Tip

Tips and tricks appear like this.

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Chapter 1. Preparation and Asset-Configuring

Greetings and welcome to this comprehensive and detailed exploration of Unity 5 that examines carefully how we take a game project from conception to completion. Here, we'll pay special attention to the best-practice workflows, design elegance, and technical excellence. The project to be created will be a first-person cinematic shooter game, for desktop computers and mobile devices, inspired by Typing of the Dead (https://en.wikipedia.org/wiki/The_Typing_of_the_Dead). Our game will be called Dead Keys (from here-on, abbreviated DK). In DK, the player continually confronts evil flesh-eating zombies, and the only way to eliminate them safely is to complete a set of typing exercises, using either the physical keyboard or a virtual keyboard. Each zombie, when they appear, may attack the player and is associated with a single word or phrase chosen randomly from a dictionary. The chosen phrase is presented clearly as a GUI label above the zombie's head. In response, the player must type the matching word in correct and full words, letter by letter, to eliminate the zombie. If the player completes the word or phrase without error, the zombie is destroyed. If the player makes a mistake, such as pressing the wrong letter in the wrong order, then they must repeat the typing sequence from the beginning.

This challenge may initially sound simple for the player, but longer words and phrases naturally give zombies a longer life span and greater opportunities for attacking. The player inevitably has limited health and will die if their health falls below 0. The objective of the player, therefore, is to defeat all zombies and reach the end of the level.

Dead Keys, the game to be created

Creating the word-shooter project involves many technical challenges, both 3D and 2D, and together, these make extensive use of Unity and its expansive feature set. For this reason, it's worth spending some time exploring what you'll see in this book and why. This book is a Mastering title, namely Mastering Unity 5, and the word Mastering carries important expectations about excellence and complexity. These expectations vary significantly across people, because people hold different ideas about what mastery truly means. Some think mastery is about learning one specific skill and becoming very good at it, such as mastery in scripting, lighting, or animation. These are, of course, legitimate understandings of mastery. However, others see mastery more holistically, and this view is no less legitimate. It's the idea that mastery consists in cultivating a general, overarching knowledge of many different skills and disciplines, but in a special way by seeing a relationship between them and seeing them as complementary parts that work together to produce sophisticated and masterful results. This is a second and equally legitimate understanding of the term, and it's the one that forms the foundation for this book.

This book is about using Unity generally as a holistic tool-seeing its many features come together, as one unit, from level editing and scripting to lighting, design, and animation. For this reason, our journey will inevitably lead us to many areas of development-not just coding. Thus, if you're seeking a book solely about coding, then check out Packt's title on Mastering Unity Scripting. In any case, this book, being about mastery, will not focus on fundamental concepts and basic operations. It assumes already that you can build basic levels using the level editor and can create basic materials and some basic script files using C#. Though this book may at times include some extra, basic information as a refresher and also to add context, it won't enter into detailed explanations about basic concepts, which are covered amply in other titles. Entry level titles from Packt include Unity 5.x By Example, Learning C# by Developing Games with Unity 5.x, and Unity Animation Essentials. This book, however, assumes you have a basic literacy in Unity and want to push your skills to the next level, developing a masterful hand in building Unity games, across the board.

So, with that said, let's jump in and make our game!

Getting clear on design

To build games professionally and maximize productivity, always develop from a clear design, whether on paper or in digital form. Ensure that the design is stated and expressed in a way that's intelligible to others, and not just to yourself. It's easy for anybody to jump excitedly into Unity without a design plan, assuming you know your own mind best of all, and then to find yourself wandering aimlessly from option to option without any direction. Without a clear plan, your project quickly descends into drift and chaos. Thus, first produce a coherent game design document (GDD) for a general audience of game designers who may not be familiar with the technicalities of development. In that document, you will get clarity about some very important points before using development software, making assets, or building levels. These points, and a description, are listed in the following sections, along with examples that apply to the project we'll be developing.

Note

A GDD is a written document created by designers detailing (through words, diagrams, and pictures) a clear outline of a complete game. More information on GDD can be found online at https://en.wikipedia.org/wiki/Game_design_document.

Target Platforms

Target Platforms

The Target Platform specifies the device, or range of devices, on which your game runs natively, such as Windows, Mac, Android, iOS, and so on. This is the full range of hardware on which a potential gamer can play your game. The Target Platforms for DK include Windows, Mac, Android, and iOS.

Reaching decisions about which platforms to support is an important logistical and technical as well as political matter. Ideally, a developer wants to