XNA Basics (01) Game Cycle

When the VS 2008 and XNA Gamestudio 3.0 are installed, we can begin to learn the XNA.

First, creating a new XNA Gamestudio 3.0 project in VS 2008 (Choosing a Windows game type) generates one of the simplest, running game templates.

Next we turn our attention to the focus we are trying to dissect--the Game1 class inherited from Microsoft.Xna.Framework.Game, whose code is as follows:

public class Game1:Microsoft.Xna.Framework.Game
{
Graphicsdevicemanager graphics;
SpriteBatch SpriteBatch; 　　　　　　　　　　　　

Public Game1 ()
{
Graphics = new Graphicsdevicemanager (this);
Content.rootdirectory = "Content";
}

protected override void Initialize ()
{
Base. Initialize ();
}

protected override void Loadcontent ()
{
SpriteBatch = new Spri Tebatch (GraphicsDevice);
}

protected override void Unloadcontent ()
{
}

Prote cted override void Update (Gametime gametime)
{
if (gamepad.getstate). Buttons.back = = buttonstate.pressed)
this. Exit ();

Base. Update (gametime);
}

protected override void Draw (Gametime gametIME)
{
Graphicsdevice.clear (color.cornflowerblue);

Base. Draw (gametime);
}
}

Let's briefly explain the important types that are used in this class.

Graphicsdevicemanager Graphics Device Manager for access to the graphics device's channel.

GraphicsDevice graphics devices.

The Sprite Wizard, drawing a 2D or 3D image on the screen, such as a monster in the game scene is a Sprite.

SpriteBatch it uses the same method to render a set of Sprite objects.