Learning XNA 3.0

Converting the Collision Game's Screen Size

The final thing that you'll need to do is change the size of the screen. In the Game1 class, you currently set the screen size to 1024 × 768 with the following code:

graphics.PreferredBackBufferHeight = 768;
graphics.PreferredBackBufferWidth = 1024;

Change that code as follows:

#if !ZUNE
    graphics.PreferredBackBufferHeight = 768;
    graphics.PreferredBackBufferWidth = 1024;
#else
    graphics.PreferredBackBufferHeight = 320;
    graphics.PreferredBackBufferWidth = 240;
#endif

Along with the screen size, you'll want to revisit other issues that your game will have because of the small size of the screen on the Zune. For example, if you deployed the game as it's currently written, your sprites would be nearly as wide as the screen. Luckily, you already have an easy way to change the scale of all sprites built into your code. In the Sprite class, you have the following variables that cause all sprites to be drawn at their original sizes (a scale factor of 1):

protected float scale = 1;
protected float originalScale = 1;

Change that code to draw the sprites much smaller if you're working in a Zune game:

#if(!ZUNE)
    protected float scale = 1;
    protected float originalScale = 1;
#else
    protected float scale = .3f;
    protected float originalScale = .3f;
#endif

Your project is now ready to be deployed to the Zune! Make sure that your Zune is connected to your PC, as described earlier in this chapter, and that the Zune is not currently syncing with your PC. Once you're ...