Beginning iOS 3D Unreal

Games Development

Robert Chin/

'

Apress*

Contents

Contents at a Glance iii

About the Author ix

About the Technical Reviewers x

Acknowledgments xi

Introduction xii

Chapter 1: UDK Overview 1

Getting Started 1

Unreal Editor Overview 1

The Generic Browser 2

Actor Classes Tab 3

The Content Browser and UDK Assets 5

Importing New Content 6

Searching for UDK Assets 6

UDK Texture Assets 8

UDK Material Assets 9

UDK Mesh Assets 10

UDK Particle System Assets 13

UDK Sound Cue Assets 14

I0S Specific UDK Information 16

Saving Data on an iOS Device 16

Textures on an iOS Device 17

Player Input Controls on an iOS Device 17

PC to iOS Setup 22

iOS Requirements 22

Apple Developer's License 23

Provisioning 23

Running the UDK Game on the iOS Device 23

Configuring Custom Game Types 27

Summary 28

M Chapter 2: UnrealScript Overview 29

Kismet or UnrealScript? 29

Overview of UnrealScript 32

Iv

UnrealScript Comments 34

UnrealScript Variables 34

Operators 38

Code Execution Row Control Statements 39

Class Declarations 41

Functions 41

States 42

Debug Messages 43

Creating and Compiling UnrealScript 43

Hands-On Example: Selecting an Object with Touch .45

Creating the Game Type 46

Creating the Player Controller 47

Settting up the Game Type Configuration 49

Running the Game Type 50

Summary 51

Chapter 3: Player Controllers, Pawns, and Weapons 53

Player Controller and Pawn Overview 53

Hands-on Example: Making your pawn visible with a 3D skeletal mesh character 55

Creating the Default First-Person View 55

Adding a Skeletal Mesh to represent your pawn 58

UDK Camera Overview 59

Hands-on Example: Changing the view of your pawn 60

UDK Weapons Overview 63

Inventory Manager 63

Weapon Types 63

Weapon States 64

Weapon Selection 66

Weapon Firing 67

Hands-on Example: Adding a weapon to your pawn 68

Creating the Weapon 68

Creating the Bullets for the Weapon 70

Creating the Custom Inventory Manager 71

Adding to the Player Controller 74

Hands-On Example: Adding a weapon to your first-person view 76

Creating the Weapon 76

Creating the Projectile for the Weapon 77

Creating the Pawn 77

Creating the Player Controller 78

Creating a New Game Type 80

Setting up your new Game Type 80

Running the new Game Type 81

Summary 82

Chapter 4: UDK Collisions 83

Collision Meshes 83

Collision Objects 86

KActor and KAsset Overview 86

Hands-on Example: Creating a KActor and applying a force to it 88

Hands-On Example: Creating a KAsset and applying a force to it 100

Physics Constraints 110

Physics Constraints Overview 110

Hands-On Example: Creating physics constraints with the Unreal Editor 113

Collisions 121

Collision Overview 121

Hands-on Example: Creating a Collision Object and Putting It in a Level 123

Hands-On Example: Making an exploding wall of blocks 132

Summary 135

HChapter 5:UDK Bots 137

UDK Bot Overview 137

Bot Related Classes '. 138

Key Bot Related Functions •138

Possession 139

Path Finding 140

Path Nodes 140

Navigation Mesh 141

Hands-On Example: Creating a bot and having it follow you using Path Nodes 142

Hands-On Example: Creating a bot and having it follow you using a Navigation Mesh 154

Hands-On Example: Moving a Bot to a point in the world specified by the Player 161

Hands-On Example: Equipping your bot with a weapon and Taking Damage 166

Summary 174

IIChapter 6: Environment: Sounds, Kismet, and HUD 175

UDK Sound Cues 175

Overview of the UDK Sound Cue Editor -.175

Adding Sound Cues Using the Unreal Editor •' 180

Adding Sound Cues Dynamically using UnrealScript 181

Adding Sound Cues Using Kismet 181

Hands-On Example: Adding Sound Cues to a Weapon 182

Kismet, Matinee and Moving Objects 185

Hands-On Example: Using Kismet to create a Moving Platform 185

Hands-on Example: Using Kismet to create Locked Gates 193

UDK Heads Up Display 199

Overview of the HUD 200

Hands-on Example: Adding a Basic Heads Up Display 201

Summary 204

HChapter 7: Sample Game and GamePlay 205

Gameplay Overview 205

Game Difficulty 205

Game Balance 206

Basic GamePlay 207

Hands-On Example: Creating a Basic Game Framework 207

Summary 225

Chapter 8:3D Math Review 227

Vectors 227

Vector Magnitude 229

Rotator to Vector Conversion 230

Normalizing Vectors 231

Vector Addition 231

Scalar Multiplication 232

Unit Circle 234

Right Triangle 235

Dot Product 236

Cross Product 237

Cover Nodes 238

Cover Node Overview 238

Hands-on Example: Cover Nodes 239

In-Depth Example Explanations 257

Third-Person Camera Positioning 257

Deriving a Direction Vectorfor Kicking an Object 258

Summary 260

H Chapter 9: Physics Game Framework 261

Physics Game Framework Overview 261

General Overview 262

Specific Overview 262

Hands-on Example: A Basic Physics Game 263

Creating the Game Type 263

Creating the Player Controller 265

Creating the Game Ball 272

Creating the HUD 274

Creating the RigidBodyCubeEx Object 276

Configuring the Game Type 277

Creating the Level 277

Running the Game 280

Summary 281

Chapter 10: First-Person Shooter Game Framework 283

Game Framework Overview , 283

General Overview 284

Specific Overview 284

Hands-On Example: First-Person Shooter Game Framework 285

Creating the Game Type 285

Creating the Player-Related Classes 287

Creating the Enemy Bot Related Classes 295

Creating the HUD 310

Creating the Bonus 312

Configuring the Game Type 313

Creating the Level 314

Running the Game 316

Summary 318

Chapter 11: Third-Person Shooter/Adventure Game Framework 319

Game Framework Overview 320

General Overview 320

Specific Overview 321

Hands-on Example: Third-Person Shooter/Adventure Game Framework 321

Creating the Game Type 321

Creating the Player Controller 322

Creating the Bot Ally Controller 330

Creating the BotMarker 336

Creating the Enemy Guard Bot Controller 337

Creating Enemy Guard Bot Pawn 342

Creating the Heads Up Display 342

Creating the Power Generator 345

Configuring the Game Type 346

Creating the Level 347

Running the Game 348

Summary '. 350

Chapter 12: Top-Down Shooter/RPG Game Framework 351

Game Framework Overview 352

General Framework Overview 352

Specific Framework Overview 352

Hands-On Example: Creating a Top-Down Shooter / Role-Playing Game Framework 353

Creating the GameType 354

Creating the Player Controller 354

Creating the Player Pawn 359

Creating the Ally Bot Pawn 361

Creating the Enemy Bot Pawn 361

Creating the Character Information Class 362

Creating the Save Marker 363

Creating the Load Marker 364

Creating the HUD ....365

Configuring the Game Type 367

Creating the Level 368

Running the Game 369

Summary 371

Index 373