Swift Game Programming for Absolute Beginners

Contents at a Glance......Page 6
Contents......Page 8
About the Author......Page 18
About the Technical Reviewer......Page 19
Acknowledgments......Page 20
Introduction......Page 21
Part I: Getting Started......Page 25
    Processors and Memory......Page 26
    Programming Languages......Page 27
   Programming Games......Page 28
   Developing Games......Page 29
    Large Scale: Design-Specify-Implement......Page 30
   Building Your First Swift Program......Page 31
   Building Your First Swift Game......Page 34
   A Few Observations......Page 37
   What You Have Learned......Page 38
   The Game World......Page 39
    The Game Loop......Page 40
    The Game Loop in Swift......Page 41
    Types of Applications......Page 43
    Functions......Page 44
    Syntax Diagrams......Page 45
    Calling a Function......Page 46
    Instructions vs. Lines......Page 47
    Whitespace and Indentation......Page 48
   What You Have Learned......Page 49
    Types......Page 50
    Declaration and Assignment of Variables......Page 51
    Instructions and Expressions......Page 54
    Priority of Operators......Page 55
   Other Numeric Types......Page 56
   The DiscoWorld Game......Page 58
   Scope of Variables......Page 60
   What You Have Learned......Page 61
 Chapter 4: Game Assets......Page 62
   Loading and Drawing Sprites......Page 63
   Resolutions and Aspect Ratios......Page 64
   Moving Sprites......Page 68
   Loading and Drawing Multiple Sprites......Page 69
   Configuring the Device Orientation......Page 71
   Music and Sounds......Page 72
   What You Have Learned......Page 74
Part II: Painter......Page 75
   Dealing With Touch Input......Page 77
   Using the Touch Location to Change the Game World......Page 80
   Conditional Execution Based on Touch......Page 82
   Testing for Alternatives......Page 83
   Comparison Operators......Page 85
   The Boolean Type......Page 86
   Changing the Color of the Cannon......Page 88
   A Few Final Remarks......Page 91
   What You Have Learned......Page 92
   Methods......Page 93
   Parameter Names and Labels......Page 96
   Default Parameter Values......Page 99
   Reorganizing Instructions into Methods......Page 100
   Moving Between Local and World Coordinates......Page 102
   Adding a Ball to the Game World......Page 103
    Shooting the Ball......Page 104
    Updating the Ball Position......Page 105
   Fixed Timestep vs. Variable Timestep......Page 107
   Updating the Ball Color......Page 109
   What You Have Learned......Page 111
   Creating Multiple Objects of the Same Type......Page 112
   Classes as Types......Page 113
   Input Handling in a Separate Class......Page 115
   Initializing Objects......Page 116
   The Self Keyword......Page 119
   Accessing Other Objects Using Static Variables......Page 121
   The Double Role of Classes......Page 122
   Writing a Class with Multiple Instances......Page 123
   Dealing with Randomness in Games......Page 124
   Calculating a Random Velocity and Color......Page 126
   Updating the Paint Can......Page 127
   What You Have Learned......Page 128
   A Different Way to Represent Colors......Page 129
   Controlled Data Access for Objects......Page 130
   Adding a Computed Property to a Class......Page 132
   Handling Collisions Between the Ball and the Cans......Page 134
   Values and References......Page 135
   Structs......Page 138
   What You Have Learned......Page 140
   Maintaining the Number of Lives......Page 141
   Executing Instructions Multiple Times......Page 143
   A More Compact Looping Syntax......Page 146
    Infinite Repeat......Page 150
    Nested Repeats......Page 151
   Restarting the Game......Page 152
   What You Have Learned......Page 155
   Similarities Between Game Objects......Page 156
   Inheritance......Page 157
   Game Objects and Inheritance......Page 160
   Cannon as a Subclass of ThreeColorGameObject......Page 162
   The Ball Class......Page 163
   The PaintCan Class......Page 166
   Inheriting from Existing Classes......Page 167
   Hierarchies of Classes......Page 169
   What You Have Learned......Page 170
   Adding Motion Effects......Page 171
   Adding Sounds and Music......Page 172
   Maintaining a Score......Page 174
   Characters and Strings......Page 175
    Special Characters......Page 176
   A Few Final Remarks......Page 177
   What You Have Learned......Page 179
Part III: Tut’s Tomb......Page 180
   Creating a Touch Object......Page 181
   Arrays......Page 183
   Dictionaries......Page 185
   Optionals......Page 186
   Storing Multiple Touches......Page 188
   Making Dealing with Touch Input Easier......Page 190
   Linking Touch Events to the Input Helper Class......Page 191
   Dragging Sprites......Page 193
   What You Have Learned......Page 195
   A Basic Class for Game Objects......Page 196
   Game Object Subclasses......Page 197
   Adding Physics to Game Objects......Page 198
   Interaction......Page 200
   What You Have Learned......Page 203
   Game Object Behavior......Page 204
   Actions......Page 205
   Using Actions to Drop Treasures......Page 206
   Special Types of Treasure......Page 209
   Turning Treasures Into Rocks......Page 211
   Handling Physics Contacts......Page 212
   What You Have Learned......Page 214
   Better Layer Handling......Page 215
   Adding a Title Screen......Page 216
   Adding a Button to Show a Help Frame......Page 217
   Overlays......Page 220
   What You Have Learned......Page 223
   Adding a Score......Page 224
   Controlling Access......Page 226
   Using a Custom Font......Page 227
   Adding Glitter......Page 229
   Adding Music and Sound Effects......Page 231
   What You Have Learned......Page 233
Part IV: Penguin Pairs......Page 234
   Game Objects in a Grid Layout......Page 236
   Class Extensions......Page 240
   Adding an On/off Button......Page 242
   Calculating World Positions of Game Objects......Page 244
   Completing the Slider Class......Page 245
   What You Have Learned......Page 248
   Basics of Managing Game States......Page 249
   The Game State Manager......Page 250
   Assigning Names to Nodes......Page 251
   Adding States and Switching Between Them......Page 253
   The Level Menu State......Page 254
   What You Have Learned......Page 256
 Chapter 19: Storing and Recalling Game Data......Page 257
   Structure of a Level......Page 258
   Reading Data From Files......Page 259
   The Tile Class......Page 261
   The Level State......Page 262
    Using switch to Handle Alternatives......Page 265
    Loading Different Kinds of Tiles......Page 267
   Maintaining the Player’s Progress......Page 269
   What You Have Learned......Page 271
   Defining Operators......Page 272
   Selecting Penguins......Page 273
   Updating Animals......Page 276
   Meeting Other Game Objects......Page 278
   Maintaining the Number of Pairs......Page 280
   What You Have Learned......Page 282
   Showing Hints......Page 283
   Showing a Help Frame......Page 285
   Moving to the Next Level......Page 287
   Adding Sound Effects......Page 289
   What You Have Learned......Page 290
Part V: Tick Tick......Page 291
   Overview of the Game Structure......Page 293
   The Structure of a Level......Page 294
   The Tile Class......Page 296
   The LevelState Class......Page 297
   What You Have Learned......Page 299
   What Is Animation?......Page 300
   Texture Atlases......Page 301
   The Animation Class......Page 302
   Supporting Multiple Animations......Page 304
   The Player Class......Page 305
   What You Have Learned......Page 308
 Chapter 24: Platform Game Physics......Page 309
   Setting the Character at the Right Position......Page 310
   Jumping …......Page 311
   Collision Detection......Page 312
   Retrieving Bounding Boxes......Page 313
   Handling Character-Tile Collisions......Page 314
   Dealing with the Collision......Page 315
   What You Have Learned......Page 318
   The Rocket......Page 319
    Creating and Resetting the Rocket......Page 320
    Programming the Rocket Behavior......Page 321
    The Basic PatrollingEnemy Class......Page 322
    Different Types of Enemies......Page 324
   Other Types of Enemies......Page 326
   Loading the Different Types of Enemies......Page 327
   What You Have Learned......Page 328
   Collecting Water Drops......Page 329
   Ice Blocks......Page 330
   Enemies Colliding With the Player......Page 332
   Adding Horizontal and Vertical Scrolling......Page 334
   What You Have Learned......Page 337
   Adding a Timer......Page 338
    Making the Timer Go Faster or Slower......Page 340
    When the Timer Reaches Zero......Page 341
   Adding Mountains and Clouds......Page 343
   Showing the Help Frame......Page 345
   Finalizing the Level Progression......Page 346
   What You Have Learned......Page 348
Index......Page 349