Beginning 3d game development with unity 4, 2nd edition

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www.it-ebooks.info For your convenience Apress has placed some of the front matter material after the index Please use the Bookmarks and Contents at a Glance links to access them www.it-ebooks.info Contents at a Glance About the Author�� xix About the Technical Reviewer�� xxi Acknowledgments�� xxiii Introduction�� xxv ■■Chapter 1: Introduction to Game Development��1 ■■Chapter 2: Unity UI Basics—Getting Started��23 ■■Chapter 3: Scripting: Getting Your Feet Wet��63 ■■Chapter 4: Terrain Generation: Creating a Test Environment��85 ■■Chapter 5: Navigation and Functionality��139 ■■Chapter 6: Cursor Control��189 ■■Chapter 7: Imported Assets��223 ■■Chapter 8: Action Objects��263 ■■Chapter 9: Managing State��299 ■■Chapter 10: Exploring Transitions��345 ■■Chapter 11: Physics and Special Effects ��391 ■■Chapter 12: Message Text��451 ■■Chapter 13: Inventory Logic��483 ■■Chapter 14: Managing the Inventory��511 ■■Chapter 15: Dialogue Trees��551 v www.it-ebooks.info ■ Contents at a Glance ■■Chapter 16: Mecanim and Characters��581 ■■Chapter 17: Game Environment��637 ■■Chapter 18: Setting Up the Game��679 ■■Chapter 19: Menus and Levels��725 Index��767 vi www.it-ebooks.info Introduction Why Write This Book Real-time 3D games have been around for well over ten years now We’ve all played them, created assets in the style of our favorites, and maybe even “mod”ed a few of them But with the Unity game engine leaping ahead in its effort to provide a free or low-cost means of authoring for desktop, mobile, or console games, the only barrier left to creating your own games is your level of commitment and the number of hours you are willing or able to devote Times have changed 3D has become affordable not only in the movie industry, as seen by the number of titles featuring CG (computer graphics), but also in the game industry, where we’ve seen a shift in casual games from 2D to a 3D format With Unity’s bold move to offer a robustly featured free version of its engine, a radical change in the pricing models of the high-end engines has rocked the industry The cost of the engine is no longer a barrier to taking your game from a nebulous idea to a working prototype and even on to a marketable product Whether your interest is in casual games or you have more ambitious aims, if you have no previous scripting experience but are eager to bring your art assets and story to life, this may be just the book to get you under way In today’s modern game engines, the heavy programming is handled by the engine itself, so the logic and game play can be scripted by those with more creativity than traditional programming knowledge In this book, I will approach game creation and design decisions from a 3D artist’s view, taking the logic and scripting in small pieces, while introducing artists, budding game designers, and novice programmers to real-time game engine concepts at the same time This book is written in a project-based format, so you will not only end up with a playable game and scripting resources you can reuse for other games, but you will experience typical design decisions that have to be addressed throughout the process You will create your game by starting with the basics and refining it as you add functionality; I will explain the logic behind certain choices and real-time game concepts as you go along The project for this book is based on a first-person point-and-click adventure game, complete with inventory, state management, load/save functionality, and a strong emphasis on the visual aspects of game creation Even if you are more of a first-person-shooter-type game enthusiast, you will be able to see how including entertaining or interesting tasks and features can enhance your favorite genre The aim of this project is to introduce you to a logical progression of design decisions and problem solving that will be of value well beyond the scope of the adventure game genre It provides a framework and a methodology for creating and, more important, finishing your own game You will be going beyond the basic Unity functionality and use of standard assets to investigate topics rarely covered in online tutorials or books All of the necessary art assets to complete the project are provided Author’s Note Several years ago, after taking my class through a race game, a first-person shooter, and a platform jumper, I decided that the last mini-project would be a classic adventure game Much to my surprise, the class got quite motivated with all of the design decisions and logic involved As there were no existing tutorials on this genre at the time, we created the game from the ground up, borrowing scripts from the previous projects, creating several of our own, and drawing heavily on the knowledge base of the Unity community This book grew out of that experience, both to fill a need and to share the adventure with others xxv www.it-ebooks.info ■ Introduction Contemporary Adventure Games For this project, you will be creating a variation on the classic point-and-click adventure game The adventure genre, of which there are many variations, is an ideal starting place for artists and others with little or no scripting experience The story, art assets, and animation are major components of this type of game, and the slower pace allows more freedom from script optimization, as split-second player reaction time is not required If your only goal is to create a first-person-shooter-type game, this book may not be for you Conversely, if your tastes are more eclectic, you may find all sorts of information that can be applied to your current genre of choice With Unity 4.0, the addition of Mecanim provides an ideal opportunity to introduce another common feature of the adventure genre—characters and dialogue trees That you can so without being an expert on character animation makes it even more fun The more substantial incorporation of physics and various special effects this time around has also contributed to pushing this edition of the book’s project from “classic” to “contemporary.” One of the most enjoyable components of the adventure game is the collection and use of an odd assortment of objects Because of the importance of inventory and state management, several chapters are dedicated to their design and implementation Neophyte Unity developers often ask how to implement these features in community forums, but they rarely receive answers, owing to the scope of the topic By the end of this book, you will be armed with the scripts, concepts, and experience to be able to take the knowledge beyond this genre Interactive adventure games are also ideal for indie developers, and they appeal to a broad range of players FireProof Games’ The Room, authored in Unity, was one of the top-rated mobile games of the year, proving that Unity has taken its commitment to the mobile and casual gaming community very seriously About the Unity Game Engine Unity is the perfect choice for small studios, indie developers, and those of us who have always wanted to make our own games Its large user base (more than 1.2 million in the summer of 2013) and extremely active user community allows everyone from newbies to seasoned veterans to get answers and share information quickly Unity provides an excellent entry point into game development, balancing features and functionality with price point The free version of Unity allows people to experiment, learn, develop, and sell games before committing any of their hard-earned cash Unity’s very affordable, feature-packed Pro version is royaltyfree, allowing people to make and sell games with the very low overhead essential to the casual games market The market for multi-platform games—especially casual games for iPhone and Android—is extremely popular at the moment, and Unity’s commitment to cross-platform delivery is well proven Originally a Mac-based authoring application that could publish to Mac and Windows, Unity unveiled its Windows version in spring 2009 As expected, it has opened opportunities for PC-based developers and artists Since that time, Unity has continued to add support for iPhone, Android, iPad, and Wii and is developing support for Xbox 360 and PS3 In spring 2013, Unity Technologies revealed its latest surprise: for Unity free users, the license for iOS, Android, Windows mobile, and Blackberry is now, or will shortly be, free as well Early adapters of the Unity engine tended to migrate from Flash and Director, making the scripting environment easily adoptable While many Unity users have an ActionScript background in making Flash games, it is by no means a prerequisite There is a lot of material for creating games in Unity, including first-person shooters, racing games, platform jumpers, and the like Even if your interest lies elsewhere, there are plenty of helpful tips and tricks to be gleaned from even the most unlikely sources Don’t be afraid to take advantage of the resources available on the Unity web site (www.Unity3D.com), the Unity Forum (forum.unity3d.com), Wiki (www.unifycommunity.com/wiki), UnityAnswers (answers.unity3d.com), and numerous private-party web sites devoted to the Unity engine Unity documentation also contains a wealth of valuable information, but, as with any technology that has a unique vocabulary, it’s sometimes hard to find just what you’re looking for Prefacing your query with Unity or Unity3D and searching the Internet is often the easiest way to find elusive concepts or functionality You can make use of them via the Help menu, but it is often quicker to take advantage of the online version xxvi www.it-ebooks.info ■ Introduction Will I Have to Learn to Script? You don’t have to be a programmer to make your own game with Unity, but you will have to be able to understand enough of what the scripts to know what can be tweaked to your advantage or decide if a particular script will suit your needs Most game play has to be scripted in Unity, but there are hundreds of scripts already available that can be readily reused Unity ships with several of the most useful More can be found by searching the Unity Forum, Wiki, or UnityAnswers Many forum members will even write bits of script for less adept users In the Collaboration section of the forum, you can even find scripters looking to trade for art assets By the end of this book, you should know enough to be able to take advantage of the wealth of material available from the Unity community Games, by their very definition, are about interaction; even in games that are largely controlled by physics, logic-driven cause and effect is what differentiates them from linear plot-driven passive media Even the most “artist friendly” game engines require scripting to move beyond simple environmental walk-throughs This book’s aim is to familiarize you with scripting a few lines at a time, while providing visual feedback as often as possible The assumption is that you have not yet decided to learn to script but are happy enough to participate in its creation in a more passive manner Scripting Is More About Logic Than Syntax While many people worry that learning a new language will be difficult and intimidating, think of it this way: most people under the age of 35 are quite fluent in texting, which is a valid subset of our native language To a certain extent, it has its own vocabulary and syntax, and it is very similar to scripting languages, in that it is more of a subset than an entirely new language The difference mainly lies in the method used to acquire the “language.” In texting, as with our native language, one doesn’t set out to study and learn the language Instead, one absorbs, experiments, and eventually becomes competent through repeated contact, trial and error, and a host of other passive means, rather than rote memorization and stressful examination This book, because it’s about the logic behind game design and creation, treats scripting as an immersive experience that is a sideline to the game-development process You are free to choose your own amount of involvement with the scripting Whatever you choose, the main scripts developed in the book will enable you to create or expand upon the final output of the book, the game, with your own ideas and art assets That being said, there are only a few important concepts and a handful of keywords you need to know in order to get an idea of what’s being done in a script Fortunately, most scripters are quite good at including comments explaining what the code is doing, thus making complicated scripts much less daunting to investigate Scripts developed in this book will be provided on a per-chapter basis, and the logic behind them explained in the chapters, but I hope that you will display classic adventurer curiosity and take advantage of the scripting explanations to some experimenting on your own What About Math? One of the most common things we hear people say in the 3D industry is, “If I’d known math was going to be so useful, I would have paid more attention in class.” Be that as it may, most artists and designers are not going to want to invest any time in brushing up on their math skills Don’t worry! My primary goal is to help you create a game Some of the functionality you will scavenge for your game is easy to use without even knowing how it works Most of us are quite happy to drive cars without having extensive knowledge of the internal combustion engine Don’t be afraid to treat scripting the same way! xxvii www.it-ebooks.info ■ Introduction Assumptions and Prerequisites This book assumes that you are at least somewhat familiar with 3D assets and 3D space, but it does have a short review of the concepts and plenty of tips and tricks throughout It assumes that you will not have had much scripting experience (if any at all) but that you’ll be willing to work through it in order to bring your stories to life It assumes that, as of yet, you have little or no experience with using the Unity game engine It also assumes that you are fairly new to the game-making process but have a strong desire to create your own real-time 3D game Additionally, this book assumes that if you want to explore genres other than classic point-and-click adventure games, you will work through the book with a goal of thinking about how to apply the various techniques to get results related to the other genre In the casual game market, combining elements of adventure games, first-person shooters, and other genres is not only acceptable but makes for some very entertaining results What This Book Doesn’t Cover This book is not about conventional game design; it is more of a precursor, getting you into the habit of analyzing needs and weighing choices Not only is creating a massive design document intimidating when you are the one who will have to implement everything, but it is likely to be unrealistic until you are more familiar with the engine and your own capabilities You’re going to build your game up a little bit at a time, prototyping ideas and functionality as you go along This is not a book on how to become a programmer, still less on programming best practices The scripting in this book is designed to ease a non-programmer into the process by providing instant visual feedback as often as possible While there are usually several ways to attain the same goal, the scripting choices made in this book are the easiest to read and understand from an artist’s or designer’s point of view In this book, scripting is presented in the way a native speaker learns his or her own language He or she is surrounded by it, immersed in it, and allowed to tinker with it to slowly gain a basic working knowledge of it Don’t worry about remembering it all Some things you will use throughout the project, and others you will be encouraged to take note of for future reference Conventions Used in This Book Instructions look like this ■■Tip Follow this format Code looks like this Platform This book was written using Unity 4.x in a Windows and a Windows environment Differences for shortcut keys and operating system file storage with Unity on a Mac will be noted throughout the book and are also available through the help files xxviii www.it-ebooks.info Chapter Introduction to Game Development In the first edition of this book, the classic point-and-click adventure genre provided not only a forgiving environment in which to create a game, but it also allowed readers to explore tips, tricks, and techniques often ignored in other beginning Unity game books This edition updates the classic adventure game to its modernized counterpart, the contemporary adventure game A 3D world, physics, real-time special effects, and 3D characters enhance the player’s experience as he goes through the world acquiring objects of questionable use and solving puzzles, both physical and logic-based Coupled with the fact that it appeals to a wide range of players, including many who have never played a first-person-shooter type game, it also becomes an ideal vehicle for the casual games market And in case your idea of adventure still includes gratuitous use of weaponry, you will even get an introduction to that as well, as the book progresses As with any project, how to begin is with a bit of research Critical thinking and investigation at the start will save time in the long run The Adventure Genre If you are old enough to have been around during much of the adventure game’s history, you’ve probably gotten ideas for your own game, based on the most successful and entertaining features of the classics If you are younger, you may have discovered them through various web sites dedicated to their preservation Either way, there are lots of good ideas to be found, especially as changes in technology open new avenues for game content to take advantage of Text Adventure Games “You are standing at the end of a road…” The granddaddy of all adventure games is arguably Adventure, the text-based game originally design by Will Crowther in the mid-1970s In an era where computer games were dominated by Pong and PacMan, the text-based game that catered to those with a dexterous mind rather than dexterous fingers was a revelation In the earliest version, also known as Colossal Cave, Crowther set the scene for intrepid adventurers to explore a great underground cave system, collecting loot and dealing with the occasional monster It was reportedly fashioned after the Mammoth Cave system in Kentucky, where Crowther had developed a vector-based map in conjunction with his own explorations and existing surveys Adventure set the stage for the genre, where the prose was always beautifully descriptive and often highly entertaining, due in part to the vocabulary and parsing of the users’ input Infocom’s Zork series, introduced us to the Great Underground Empire, the Flathead dynasty, and the coin of the realm, the zorkmid They spawned several memorable lines, such as “Your lamp is getting dim,” “You can’t get there from here,” and many running jokes Anyone who knows what a grue is can tell you that when your lamp goes out, you are in danger of being eaten by one www.it-ebooks.info Chapter ■ Introduction to Game Development Graphical Adventure With the advent of computer graphics, the text-based adventure-game genre waned, as graphic quality and resolution slowly improved Eventually, the text-based predecessor gave way to the still-image format, or graphical adventure genre, pioneered by Sierra Online’s King’s Quest, a host of LucasArts offerings, and Infocom’s later Zork titles The graphical format spelled the end of players typing in their instructions or questions, relying instead on a short predefined list of verbs activated by mouse picks Gone was a large part of the charm of the early text adventures, where one could type in just about anything to see if the authors had allowed for it, no matter how ridiculous or risqué As far as creating material for the new genre, it now required more than just a writer and programmer It introduced the artist as a major part of the production pipeline As resolution increased, so did the art assets required Unlike levels in today’s first-person shooters, where the player faces enemies that are increasingly more difficult to overcome in each successive level, the worlds in adventure games continue to be strongly differentiated by theme, visual style, color scheme, and music The reward for gaining access to the various worlds is the discovery of new and intriguing environments, designed to stimulate the senses and draw the player into the fantasy In the early 1990s, Rand and Robyn Miller’s Myst twisted the usual format to introduce the concept of using game play to reveal the story itself Acquisition and inventory was practically nonexistent, but interaction and task- or puzzle-solving was visually breathtaking for the times (Figure 1-1) Among the first to incorporate 3D graphics instead of traditional artwork, they introduced another shift in the genre Now, not only did one require artists to produce a game, a good number of them had to be able to create artwork in the fledgling 3D programs Figure 1-1. Myst, one of the first adventure games to make use of 3D graphics (Myst [TM] is the sole property of Cyan Worlds, Inc Copyright 1993, 2001 Cyan Worlds, Inc All rights reserved Used with permission.) LucasArts Titles Undoubtedly a force in the early days of the graphical adventure game genre was LucasArts With an army of professional film personnel from which to draw, LucasArts titles gained a huge reputation for outstanding storytelling, top-notch graphics, and marvelous soundtracks Of note is the Monkey Island series As with several other titles, such as Sam and Max and Day of the Tentacle, the entertainment is heavily driven by humor, references to pop culture, and a hearty sense of the ridiculous Monkey Island III, The Curse of Monkey Island was one of the last LucasArts titles to use traditional hand-painted backdrops and cell animation Apart from low resolution by today’s standards, its style and execution continue to stand the test of time www.it-ebooks.info For Phillip, who kept reminding me about how long I had been talking about writing this book www.it-ebooks.info Contents About the Author�� xix About the Technical Reviewer�� xxi Acknowledgments�� xxiii Introduction�� xxv ■■Chapter 1: Introduction to Game Development��1 The Adventure Genre��1 Text Adventure Games�� Graphical Adventure�� Fast Forward to Real Time�� Designing Your Game��6 Defining a Style�� Compartmentalizing Environments�� First-Person or Third?�� Animation�� Content�� 10 Managing Your Project��11 Multiple Roles�� 11 Choosing the Game Engine�� 11 The Requirements�� 11 Tips for Completing Your First Game�� 12 New to Real Time vs Pre-render��14 Terms and Concepts�� 15 Summary��21 vii www.it-ebooks.info ■ Contents ■■Chapter 2: Unity UI Basics—Getting Started��23 Installing Unity and Starting Up��23 Loading or Creating a New Project or Scene ��23 The Layout ��27 Scene View �� 28 Game Window�� 29 Hierarchy View�� 30 Project View�� 30 Inspector�� 30 Toolbar��31 Menus��32 File �� 33 Edit�� 33 Assets�� 34 GameObject �� 34 Component �� 34 Window�� 34 Help�� 34 Creating Simple Objects��34 Selecting and Focusing��40 Transforming Objects��41 Snaps��44 Vertex Snaps�� 45 Scene Gizmo��46 Non-Snap Alignment�� 47 Lights ��48 viii www.it-ebooks.info ■ Contents 3D Objects��55 Meshes�� 55 Sub-Objects of a Mesh�� 56 Mapping�� 57 Materials��61 Summary��61 ■■Chapter 3: Scripting: Getting Your Feet Wet��63 What Is a Script?��63 Components of a Script��64 Functions�� 64 Variables�� 72 Picking an Object in the Game�� 76 Conditionals and State��81 Deconstructing the Conditional�� 83 Order of Evaluation��84 Summary��84 ■■Chapter 4: Terrain Generation: Creating a Test Environment��85 Creating Environments��85 Creating a Terrain Object�� 86 Flythrough Scene Navigation�� 90 The Terrain Engine��90 Topology�� 91 Painting Textures�� 95 Trees�� 99 Terrain Extras�� 122 Creating Your Own Terrain Assets�� 128 Terrain Settings�� 130 Shadows��132 Fog��137 Summary��138 ix www.it-ebooks.info ■ Contents ■■Chapter 5: Navigation and Functionality��139 Navigation��139 Arrow Navigation and Input�� 146 Fun with Platforms�� 159 Collision Walls�� 168 Your First Build�� 182 Summary��188 ■■Chapter 6: Cursor Control��189 Cursor Visibility��189 Custom Cursors��192 GUI Texture Cursor��192 Texture Importer�� 193 Color Cues�� 203 Cursor Position�� 203 Hardware Cursor��205 UnityGUI Cursor��206 Object-to-Object Communication��209 Mouseover Cursor Changes��210 Distance Check�� 217 Quick Publish��220 Object Reaction to Mouseover��221 Summary��222 ■■Chapter 7: Imported Assets��223 3D Art Assets��223 Importing the Art Assets�� 224 Import Settings��228 Import Settings: Model�� 228 Import Settings: Rig�� 234 Parenting�� 237 Import Settings: Animations�� 240 x www.it-ebooks.info ■ Contents Setting Up Materials��247 The Keys�� 247 The Chest�� 252 The Flower�� 254 Shadows��257 Static Objects and Shadows�� 258 Summary��262 ■■Chapter 8: Action Objects��263 Colliders��263 Triggering Animation��268 Triggering Complex Hierarchies�� 269 Adding Sound F/X��272 Setting Up a Two-State Animation��277 Using Unity’s Animation View��279 Changing Imported Animations�� 290 Triggering Another Object’s Animations��295 Limitations��297 Summary��298 ■■Chapter 9: Managing State��299 Identifying the Action Objects��300 Introducing the Test Plot �� 300 Walk-through�� 300 Action Objects�� 301 Stunt Doubles�� 301 Developing a State Machine��301 Components of a State Machine�� 302 The Pick Event�� 302 Separating State Metadata and Transition Action�� 304 Defining State and Transition�� 304 xi www.it-ebooks.info ■ Contents Visualizing Transitions�� 305 Organizing the Information�� 307 Lookup Table��309 Evaluating the Results�� 310 Parsing a String�� 311 Game Notes�� 312 The Object Lookup Script��313 Action-Related Messages��322 Object Metadata��323 State-Related Metadata�� 324 Processing the Pick Event�� 327 Adding the Metadata�� 330 Activating the State Engine�� 332 Refining the Pick�� 340 Hiding the Cursor�� 341 Creating a Timer�� 342 Summary��343 ■■Chapter 10: Exploring Transitions��345 Processing the Auxiliary Objects��345 Handling Object Visibility��348 Using Tags�� 349 Visibility�� 353 Handling Opacity Changes�� 355 Developing Non-Keyframed Fades�� 359 Completing Visibility Changes�� 361 Handling Special Cases��365 Ensuring Player Focus��371 Blocking Player Input�� 371 Directing Player Focus�� 374 Exploring Lerp�� 374 xii www.it-ebooks.info ■ Contents Camera Match Metadata�� 380 Refining the Camera Match�� 383 Summary��389 ■■Chapter 11: Physics and Special Effects ��391 Adding New Assets��391 Physics��395 Physics Basics�� 396 Combining Physics and Keyframe Animation��400 Cloth�� 400 RockFall�� 409 Introducing Randomness�� 413 Finding the Crystal�� 415 Particle Systems��418 Shuriken Basics�� 420 Particle Types �� 421 Pouring Particles�� 425 Particle Groups�� 429 Other Special Effects��439 Creating the Laser Beam�� 439 Building the Laser Device�� 440 Activating the Laser�� 442 Creating the UV Animator Script�� 444 Applying the UV Animator Script�� 445 Summary��449 ■■Chapter 12: Message Text��451 GUI Skin��451 OS Font Support�� 454 Text Visibility��462 xiii www.it-ebooks.info ■ Contents Using the Object Metadata��465 Tweaking the Text�� 468 Activating the Action Message�� 472 A Final Refinement�� 480 Summary��481 ■■Chapter 13: Inventory Logic��483 Using Layers��483 Creating the Inventory Screen��487 Adding Inventory Icons��495 2D Object Handling�� 500 Cursor-Based Responses�� 506 Dropping Cursors in the 3D Scene��507 Summary��510 ■■Chapter 14: Managing the Inventory��511 Organizing the Inventory Objects��511 Inventory Layout��522 Inventory Overflow��526 Setting the Limits��531 Inventory Grid Limits�� 532 Arrow Limits�� 536 Adding and Removing Objects from Inventory��538 Removing Objects from Inventory�� 539 Adding Objects to Inventory�� 541 Combining Items�� 542 Wrong Picks�� 545 Revisiting the Action Objects�� 549 Summary��550 xiv www.it-ebooks.info ■ Contents ■■Chapter 15: Dialogue Trees��551 The Scenario��551 Setting Up the New GUI Skin�� 552 Starting a Conversation��552 Filtering Topics�� 555 Getting Answers�� 557 Branching the Conversation�� 566 Summary��580 ■■Chapter 16: Mecanim and Characters��581 Adding Characters��581 Importing the Characters�� 581 Setting Up the Avatars�� 583 Defining the Animation Clips�� 587 Controlling the Characters��590 The Animator Controller�� 590 Making Changes�� 592 Transitions�� 593 Scripting the Action�� 597 Blend Trees�� 600 Layers and Layer Masks�� 603 Physics�� 606 NPC Controller��607 Tweaking for Game�� 608 Synchronizing Audio and Animation States�� 611 Combining Characters and Dialogue��615 Hooking Up the Dialogue to the Characters�� 615 Communicating with the Dialogue Manager��630 xv www.it-ebooks.info ■ Contents Wrapping Up the Test Scene��631 Preparing the ObjectLookup�� 632 Adding the NPCs to the Game�� 633 Summary��636 ■■Chapter 17: Game Environment��637 Adding the Final Assets ��637 Preparing for the New Assets�� 637 Revisiting Materials and Lightmapping�� 639 Using Imported Lightmaps in Beast�� 646 Accessing the Lower Levels of the Temple�� 647 Setting Up the Shrines��655 Hydrating the Water Shrine�� 656 Illuminating the Light Shrine�� 657 Setting Up the Maze��658 Examining the Maze Geometry�� 658 Managing the Maze Functionality�� 659 Checking for Drop Point Access�� 661 Playing the Odds�� 669 Creating an “Easter Egg” �� 675 Summary��677 ■■Chapter 18: Setting Up the Game��679 Finishing the Main Level��679 Reading Material�� 679 Finding the Golden Sleeve�� 684 Raft Ride�� 687 Locating the Crystal�� 691 Access to the Temple�� 694 Meeting Gimbok�� 699 Meeting Kahmi�� 706 Map of Tunnels�� 711 xvi www.it-ebooks.info ■ Contents Acquiring a Light Source�� 713 The Tunnels�� 716 The Final Level��722 Examining the Final Level�� 723 Summary��724 ■■Chapter 19: Menus and Levels��725 Game Menus��725 The MenuManager Script�� 726 The Main Menu�� 728 Confirm Dialog�� 737 Credits �� 740 Tracking Menu Mode�� 741 Suspending Navigation and Scene Interaction �� 742 Audio��744 Sound FX�� 744 Ambient Sound�� 745 Music�� 746 Voice Volume�� 747 Final Level Menu�� 747 Level Save and Load��748 Saving with PlayerPrefs�� 748 Saving to Text Files�� 748 Saving the Game Data�� 752 Loading the Saved Data�� 754 Traveling Between Levels��761 Start Menu��762 Final Tasks��763 Publishing�� 764 Summary��766 Index��767 xvii www.it-ebooks.info About the Author Sue Blackman is a 3D artist and interactive applications author and instructor based in Southern California She has taught 3ds Max and game classes for artists for well over ten years in top-rated community colleges and private schools, such as The Art Institute of California, and has been lead 3D artist on games for Activision, through one of its subsidiaries Blackman has worked in the industry for several years, helping to train Fortune 1000 companies, such as Boeing, Raytheon, and Northrop Grumman, to create serious games and training applications with game-based formats She has been involved with the commercial development of real-time 3D engines for more than ten years and has authored multiple training-video courses for the Unity engine for Lynda.com She is an avid tutorial writer and has created both tutorials, as a contributing author, and artwork for various 3ds Max books over the years, as well as training manuals for 3D authoring applications for serious games She has also written for ACM Siggraph on serious games, one of her favorite topics You can visit Blackman’s web site at www.3dadventurous.com or contact her through the Unity Forum xix www.it-ebooks.info About the Technical Reviewer Robert Reed, who currently resides in Phoenix, Arizona, where he attained a bachelor’s degree in game design from Collins College, was first introduced to the Unity3D game engine in 2010, when trying to decide what to use for his graduation game project, and he has used it ever since JavaScript is his primary language when using the Unity3D game engine, but in addition to JavaScript, he has become a bit proficient in a few other programming and scripting languages, including Java, C, C++, C#, ActionScript 3.0, and Lua xxi www.it-ebooks.info Acknowledgments Thanks go out to Gabriel Acosta and Jenny Wang, who helped brainstorm much of the game play for the book’s project I owe special thanks to Jenny for the start menu design and stele idea, as well as the 3DAventurous web site Thanks also to Bryan Taylor and Sean McCurry of Binary Sonata Studios for the temple music and camera match code Thanks are also in order for Evalyn Hernandez, Zach Sarachman, Rosendo Rojas, Mario Im, and Pablo Ortega, who got roped into recording some of the character dialogue A special thanks goes out to Erik Toraason, who channeled his “inner Yoda” for the Gimbok character Thank you all for taking time out from your own game projects to contribute to mine Your assets, ideas, and enthusiasms were much appreciated xxiii www.it-ebooks.info ... the resources available on the Unity web site (www .Unity3 D.com), the Unity Forum (forum .unity3 d.com), Wiki (www.unifycommunity.com/wiki), UnityAnswers (answers .unity3 d.com), and numerous private-party... beginning Unity game books This edition updates the classic adventure game to its modernized counterpart, the contemporary adventure game A 3D world, physics, real-time special effects, and 3D. .. moving on, the Unity help files include a very good section on getting started Installing Unity and Starting Up Download Unity from http:/ /unity3 d.com /unity/ download/ and install it The Unity icon

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