UDK iOS Game Development Beginner’s Guide

Table of Contents

UDK iOS Game Development Beginner's Guide

Credits

About the Authors

About the Reviewers

www.PacktPub.com

Support files, eBooks, discount offers and more

Why Subscribe?

Free Access for Packt account holders

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Time for action—heading

What just happened?

Pop quiz—heading

Have a go hero—heading

Reader feedback

Customer support

Downloading the example code

Downloading the color images of this book

Errata

Piracy

Questions

1. Getting Started on UDK with iOS

Defining UDK

Don't expect to make Gears of War

Downloading and installing UDK

Time for action—installing UDK on your PC

What just happened?

UDK directory overview

Binaries

Development

Engine

UDKGame

Setting up for iOS development with UDK

Walkthrough of Unreal Remote

Time for action—downloading and installing UDK Remote

What just happened?

Time for action—matching Mobile Previewer settings with your iOS device

What just happened?

Describing the concept of Urban Warrior, a third-person shooter title

Pop quiz

Summary

2. Beginning Urban Warrior, a Third-person Shooter

Starting out

A brief walkthrough of the UDK interface

Toolbox sidebar

Modes

Brushes

Volumes and Select

Go to and Builder Brush

Viewport toolbar

The toolbar

Exploring the main menu bar

File

Edit

View

Brush

Build

Play

Tools

Preferences

Help

The console bar

Keyboard shortcuts

Creating environments and the basics of level design

CSG brushes

Static meshes

The differences between CSG brushes and static meshes

Moving around viewports

Adding world geometry and texturing to the game

Time for action—creating a basic room

What just happened?

Time for action—texturing the level

What just happened?

Creating lighting for the game

Time for action—lighting the level

What just happened?

Creating actors and static meshes for the game

Time for action—adding static mesh detail

What just happened?

Have a go hero—adding multiple static meshes for extra detail

Progress in Urban Warrior, so far

Pop quiz

Summary

3. Taking It to the Next Level: Enriching with Content

The outside world

Time for action—creating an exterior

What just happened?

Previewing the mobile editor

Particles make everything better

Time for action—adding a particle system

What just happened?

Foggy weather

Time for action—adding fog

What just happened?

Summary

4. Using Kismet and Matinee

Defining Kismet

Creating your first Kismet sequence

Time for action—changing the level to a third-person perspective

What just happened?

Kismet primer

Parts of a sequence object

Benefits and drawbacks of using Kismet

Benefits of using Kismet

Drawbacks

Have a go hero—Kismet

Defining Matinee

Creating your first Matinee movie

Time for action—opening cutscene

What just happened?

Have a go hero—Matinee

With our powers combined...

Time for action—creating an automatic door

What just happened?

Kismet for mobile devices

Mobile Kismet—actions

Add Input Zone

Clear Input Zone

Remove Input Zone

Save/Load values

Mobile Kismet—events

Analog Input

Mobile Button Access

Mobile Input Access

Mobile Look

Mobile Object Picker

Mobile Simple Swipes

Touch Input

Draw Image

Draw Text

Give some input to the situation

Time for action—adding input

What just happened?

Have a go hero—mobile sequence objects / adding input

Pop quiz

Summary

5. Action Sequences for Urban Warrior

Sequences and you

Life, or something like it

Time for action—spawning AI into our level

What just happened?

It lives! but...

Time for action—base enemy AI

What just happened?

Improvements to be made

Time for action—base enemy AI

What just happened?

Have a go hero—taking your AI further

Exporting subsequences

Time for action—creating a second enemy

What just happened?

Remote events

When we can use a remote event

Creating a remote event

Named variables

When we can use a named variable

Creating a named variable

Manipulating the player

Time for action—regenerating player health over time

What just happened?

Have a go hero—regenerating player health over time

Prefabs

Time for action—door prefab

What just happened?

Building combat sequences

Layouts

Spawning and enemy placement

Environment

Scripting

Playtesting

Summary

6. Bringing it All Together

Starting a workflow

Time for action—starting our level

What just happened?

Geometry mode

Setting up the workflow

Some keyboard tips

Seeing double

Building our level

Time for action—building our level

What just happened?

Have a go hero—powerups and weapon pickups

Combat scenarios

Time for action—first combat scenario

What just happened?

Have a go hero—creating your own combat encounter

Time for action—end of level

What just happened?

Pop quiz

Summary

7. Advanced Content Creation for Urban Warrior

Main menu environment creation

Time for action—building main menu backdrop

What just happened?

Importing textures

Time for action—finishing the main menu

What just happened?

Adding sounds

Time for action—playing a sound effect

What just happened?

Customizing sounds

Adding music

Time for action—adding a background music track

What just happened?

Custom materials

Time for action—customizing brushes

What just happened?

Custom meshes

Time for action—importing custom objects

What just happened?

Optimizations

Console commands—statistics

stat fps

stat game

stat memory

stat es2

Combining meshes

Precomputed visibility

Streaming volumes

Debugging

Comment your code

Captain's log

Summary

8. Publishing and Monetizing Your Game

Before the magic happens

Registering as an iOS developer

Setting up provisioning

Time for action—creating new provisioning

What just happened?

Custom Graphics

Playtesting on the device

Why playtest?

How to playtest

Commercialization

Licensing UDK

In-game advertisements

In-app purchases

Bringing everyone together with Game Center

iCloud integration

Facebook/Twitter integration

Bringing our game to the world

Time for action—requesting a Distribution Certificate

What just happened?

Summary

A. Pop quiz—Answers

Chapter 1: Getting Started on UDK with iOS

Chapter 2: Beginning Urban Warrior, a third-person Shooter

Chapter 4: Using Kismet and Matinee

Chapter 6: Brining It All Together

Index

UDK iOS Game Development Beginner's Guide

UDK iOS Game Development Beginner's Guide

Copyright © 2012 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 authors, 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: August 2012

Production Reference: 1190812

Published by Packt Publishing Ltd.

Livery Place

35 Livery Street

Birmingham B3 2PB, UK.

ISBN 978-1-84969-190-1

www.packtpub.com

Cover Image by John Preston Doran ( <netravelr@gmail.com> )

Credits

Authors

John P. Doran

Christos Gatzidis

Reviewers

Richard Moore

Dan Weiss

Acquisition Editor

Joanna Finchen

Lead Technical Editor

Unnati Shah

Technical Editors

Prasanna Joglekar

Prashant Salvi

Project Coordinator

Vishal Bodwani

Proofreader

Maria Gould

Indexer

Rekha Nair

Production Coordinator

Melwyn D'sa

Cover Work

Melwyn D'sa

About the Authors

John Doran is a 23 year old Technical Game Designer, who has worked on all manners of educational, mod, and professional game projects. He graduated from DigiPen Institute of Technology in Redmond, WA with a Bachelor of Science in Game Design. John previously worked at LucasArts in San Francisco, CA on Star Wars 1313 as an Intern-Level Designer. He is currently working at DigiPen's campus in Singapore tutoring and assisting students while giving lectures on UDK, Flash, and Actionscript. If you would like to reach him, send him an e-mail at john@johnpdoran.com. Though John occasionally writes papers which he posts on his personal website, this is his first published book.

I would first like to thank both Christos Gatzidis and Joanna Finchen, for giving me the opportunity to write this book. I would also like to thank all of the people at Packt, including Vishal Bodwani and Unnati Shah, for all their support during the writing process, you were all so amazing!

I would also like to thank Daniel Weiss. In addition to being a Technical Reviewer of the book, he helped me when I was just learning Unreal Tournament 3 and kindled my love of Epic's fine game engine without which I wouldn't be here today.

On that same note, I also want to thank Samir Abou Samra and Elie Hosry for their support and encouragement while working on this book, and the rest of the DigiPenSingapore staff including Jocelyn Villanueva, Chris Champagne, and Nicolette Oh, as well as my Singapore friends, Josë Rivero, Matt Hill, and Gabriel Serra.

Last but not least, a big thanks goes to all of my friends, my little brothers and sister, Chris, Joey, and Dymphna Doran, and my girlfriend Hannah Mai for being patient with me, as I spent my free time and weekends away from them as I finished the last few chapters of the book. Finally, my parents, Joseph and Sandra Doran took me seriously, when I told them I wanted to make games.

Dr. Christos Gatzidis is a Senior Lecturer in Creative Technology at Bournemouth University, UK at the School of Design, Engineering, and Computing. He has a Ph.D. from City University London, UK and an M.Sc. in Computer Animation from Teesside University, UK, and has previously published work in a number of academic edited books, conferences, and journals. He is also the framework leader for the Creative Technology collection of degrees at Bournemouth University (which includes the B.Sc. in Games Technology and the M.Sc. in Computer Games Technology courses). Christos teaches a variety of units on these courses and uses Epic's UDK across all years of the undergraduate course, to cover topics ranging from basic level design fundamentals to more advanced scripting.

I would like to thank all friends, colleagues, and family who offered support during the writing of this book and, of course, the great people at Packt (for their guidance and endless patience) plus, last but not least, Epic Games (for the creation of UDK, easily one of the coolest game design tools ever)!

About the Reviewers

Richard Moore graduated in 2009 studying video games design at Hull School of Art and Design, where he first began expanding his creativity by working as a web designer in Hull, East Yorkshire, and London for 3 years. He worked on a number of different projects with clients from different industry backgrounds, such as a collection of stylish websites, logos, brochures, business cards, web banners, animated graphics, and e-mail marketing campaigns. Through the clouds lies his passion in video game development and the complete creation of 3D art including modeling, texturing, and high resolution rendering. He does game documentation and conceptual drawings as well.

Richard will always take any opportunity to meet as many different people from the game development community as possible and as a result, he has attended the Game Grads career fair, participated in the Game Republic 2009 student showcase in Sheffield and Platform 2010, Hulls 1st Digital and Gaming event where he won the award for best character and a cheque for £100. In March 2011, he was involved in Platform Expo's 2011, Hull's second video game expo, where he entered the video game showcase for the second consecutive year and won second prize for his outstanding contribution to video game design, and is now involved in Platform Expo's 2012 being held at the University of Hull.

In July 2011, he volunteered as a Marketing Assistant/Designer for an online-based video games magazine, where he would assist the Editor-In-Chief in designing templates for latest issues of the magazine, writing reviews on latest video game titles, and talking to clients about potential advertising coverage within the magazine and online. As a result, he is now working as a Games Designer/Developer for Concise Media Design based in London, who create ground-breaking iPad apps, high-impact short films, and bespoke video games. In his spare time, he focuses on more freelance design and development work with up and coming companies, as well as rambling on about video games.

Dan Weiss is currently a programmer working at Psyonix Studios in San Diego, CA. He is a 2010 graduate of DigiPen Institute of Technology, having worked on titles such as Attack of the 50ft Robot! during his time there. Since 2004, he has also been working on the Unreal Engine, producing the mod Unreal Demolition for Unreal Tournament 2004 and Unreal Tournament 3, and is currently working on the iOS title ARC Squadron.

I'd like to thank my parents for believing in my crazy idea of working on videogames for a living; Rachel Rutherford for always being available at all hours of the day when I need some advice; and John Doran for thinking of me when this book started coming together, and always providing me with some laughs about his latest Kismet tricks.

www.PacktPub.com

Support files, eBooks, discount offers and more

You might want to visit www.PacktPub.com for support files and downloads related to your book.

Did you know that Packt offers eBook versions of every book published, with PDF and ePub files available? You can upgrade to the eBook version at www.PacktPub.com and as a print book customer, you are entitled to a discount on the eBook copy. Get in touch with us at for more details.

At www.PacktPub.com, you can also read a collection of free technical articles, sign up for a range of free newsletters and receive exclusive discounts and offers on Packt books and eBooks.

http://PacktLib.PacktPub.com

Do you need instant solutions to your IT questions? PacktLib is Packt's online digital book library. Here, you can access, read and search across Packt's entire library of books.

Why Subscribe?

Fully searchable across every book published by Packt

Copy and paste, print and bookmark content

On demand and accessible via web browser

Free Access for Packt account holders

If you have an account with Packt at www.PacktPub.com, you can use this to access PacktLib today and view nine entirely free books. Simply use your login credentials for immediate access.

Preface

It has never been a more attractive time to be an app developer. With no signs of stopping, Apple's iOS devices are dominating the mobile scene and with UDK, the free version of the most popular third-party game engine available, it has never been easier to get into the app business.

This book, UDK iOS Game Development Beginner's Guide, takes a clear, step-by-step approach to building a small third-person shooter game using the Unreal Development Kit with plenty of examples of how to create a game that is uniquely your own.

You will begin learning the fundamentals of the Unreal Engine before creating a third-person shooter game in UDK. After the game is created you will learn what can be done with any project to optimize your game for the iOS platform and discover special considerations that need to be made. Finally, you'll publish your game on the App Store for the world to see and play along, with details on the different costs associated with publishing.

What this book covers

Chapter 1, Getting Started on UDK with iOS, offers a brief overview of the exciting world that is UDK development for iOS, while also using UDK Remote to play UDK games on PC using our iOS device as the input device.

Chapter 2, Beginning Urban Warrior: A Third Person Shooter, gives readers an insight into UDK's interface, starting off building a room, adding lighting, and populating the room with models.

Chapter 3, Taking It to the Next level: Enriching with Content, adds an exterior to our level while also adding lighting and fog specifically for mobile devices. Readers also use the Mobile Preview option to show how our level looks on an iOS device, while breathing life into our world with particle systems.

Chapter 4, Using Kismet and Matinee, allows us to look at Kismet and Matinee, two of the most popular ways to create motion and interactivity in our otherwise static world, creating a cinematic, an automatic door, and adding functionality to our game using Mobile Input. We also learn about sequence objects made specifically for mobile devices.

Chapter 5, Action Sequences for Urban Warrior, teaches readers about sequences, subsequences, and prefabs, while developing combat scenarios for our game with AI enemies.

Chapter 6, Bringing it all together, shows how to rapidly prototype levels using a workflow using Geometry Mode to flesh out Urban Warrior into a completed level.

Chapter 7, Advanced Content Creation for Urban Warrior, discusses how to make the game your own by bringing in custom content to your game, such as a main menu, audio, textures, static meshes, as well as how to create materials that work the same way on both PC and iOS, with some tips for optimization and debugging for iOS games.

Chapter 8, Publishing and Monetizing your Game, takes your finished game and walks through the process of getting the game onto your own device, and eventually to the iOS App Store, discussing all you need to know about the royalties model Epic Games has in place for UDK-developed iOS titles, with links leading readers who are interested to learn about adding even more functionality to their game.

What you need for this book

In order to use this book you need to have a computer with Windows that is capable of running the Unreal Development Kit (UDK). UDK requires a personal computer with the following system configuration:

Windows XP SP3 (32-bit only) with DirectX 9.0c

2GHz or better CPU

2+ GB RAM

A graphics card with Shader Model 3.0 support, such as nVidia GeForce 7800

Note that Windows 7 64-bit is currently the mainstream development environment.

The following are the requirements for content development:

Windows 7 64-bit

2.0+ GHz multi-core processor

8 GB System RAM

NVIDIA 8000 series or higher graphics card

Plenty of HDD space

The UDK will install .NET Framework 3.5 Service Pack 1, if you don't already have it, which will require an internet connection.

Who this