Book Image

Building your First Mobile Game using XNA 4.0

By : Brecht Kets, Thomas Goussaert
Book Image

Building your First Mobile Game using XNA 4.0

By: Brecht Kets, Thomas Goussaert

Overview of this book

With the dawn of the Windows Phone 7 platform, Microsoft has offered us an easy way to create 3D mobile games. In this book, we will build a 3D game for Windows Phone 7 together, taking full advantage of the graphics and touch capabilities, along with the sensors of the platform."Building your First Mobile Game using XNA 4.0" is the book for starting game development on the Windows Phone 7 platform. This book will go over the technical aspects of building games along with designing your own framework. Finally we'll build an actual game together from the ground up! This book will set future mobile game developers in the right direction.The XNA framework empowers us to build 2D and 3D games for PC, Xbox 360 and Windows Phone 7. We will use those capabilities to create stunning 3D games for the Windows Phone 7 platform. We will start by covering the basics like drawing graphics, followed by building a custom framework and end with building a game together!In this book, we will cover drawing 2D and 3D graphics, both static and animations. We will also cover the various ways of handling user input and help set the mood of our game playing both 2D and 3D sound, and accessing the user's media library. The only thing left before building a game is covering several techniques created for making our life easier while building the game, whilst building a framework to do just that. Finally, we'll build a 3D game together that will run on the Windows Phone 7 platform."Building your First Mobile Game using XNA 4.0" is the book you need to get started with mobile game development for Windows Phone 7. Its hands on approach will set you on your way in no time. Let's build some games!
Table of Contents (16 chapters)

Adding movement to the hero


Just like in the previous chapter, we will now add movement to our hero. He'll walk over the ground plane and turn around when he reaches the edge of the screen.

The Hero3D class

We'll start by creating a Hero3D class that will encapsulate all the behavior for movement. This class will inherit from GameObject3D class, and just like Hero2D, we will use composition.

Fields

The class has three fields, the model, the direction in which the player will move, and the walk speed.

private GameModel _heroModel;
private int _direction = 1; //1 = Right / -1 = Left
private const int Speed = 75;

Initialize

In the Initialize method we will create a new GameModel instance and set its position.

_heroModel = new GameModel("Game3D/Vampire");
_heroModel.Position = new Vector3(0, -147, -100);

LoadContent and Draw

In the LoadContent and Draw methods we just call LoadContent and Draw methods on _heroModel.

Update

The update is where all the magic happens. In this method, we will calculate the...