Difference between revisions of "Game Programming Class4"
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Microsoft has added the | Microsoft has added the | ||
*[http://msdn.microsoft.com/en-us/library/microsoft.xna.framework.gamerservices.aspx GamerServices] | *[http://msdn.microsoft.com/en-us/library/microsoft.xna.framework.gamerservices.aspx GamerServices] | ||
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| + | ===InputHandler Service=== | ||
===Console Class=== | ===Console Class=== | ||
Revision as of 03:32, 15 February 2010
Game Components
About components Application Overview
Game Components are reusable and easy to add to a game.
- GameComponent Class
- DrawGameComponent Class
http://blogs.msdn.com/xna/archive/2006/08/31/734204.aspx
Common methods
Enabled
- Indicates whether GameComponent.Update should be called when Game.Update is called.
UpdateOrder
- Indicates the order in which the GameComponent should be updated relative to other GameComponent instances. Lower values are updated first.
(available if it is a DrawableGameComponent)
Visible
- Indicates whether Draw should be called.
DrawOrder
- Order in which the component should be drawn, relative to other components that are in the same GameComponentCollection.
Game Service
A game service is a game component that uses an interface to enforce a singleton pattern and make a single instance of a game component accessible to all other components. It's a nice mechanism to maintain a loose coupling between components.
A singleton is a class that only allows a single instance of the class to be created. A game service is not a true singleton as it uses a unique interface to identify and expose it at the game level.
A game service is a built in mechanism that allows a game to create and manage a single instance of a component ans allows other components access to the service.
Good candidates for a game service are.
- InputHandler
- GameConsole
- Profiling Service
- Scoreboard
Microsoft has added the
InputHandler Service
Console Class
Separate IntroGameLibrary Project to help Encapsulate Reusable Code.
- IntroConsole.zip
- IntroGameLibrary.zip
IntroGameLibrary/GameConsole.cs To add the Component to the Game we make an declare in the game class. Then we need to add the component to the Game Components Collection.
<csharp>
GameConsole gameConsole;
public Game1()
{
graphics = new GraphicsDeviceManager(this);
Content.RootDirectory = "Content";
gameConsole = new GameConsole(this);
this.Components.Add(gameConsole);
}
</csharp>
IntroConsole/Game1.cs
Homework
- Use the fps component to create a baseline log
- Convert Project 3 to use the inputHandler service
Bonus
- Create your own game service and use it in an xna project
