Difference between revisions of "Game Programming Class2"
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| Line 4: | Line 4: | ||
The XNA Game class has two private properties | The XNA Game class has two private properties | ||
*GraphicsDeviceManager graphics; | *GraphicsDeviceManager graphics; | ||
| − | *ContentManager | + | *ContentManager content; |
<pre> | <pre> | ||
//the game constuctor can be used to set some graphics settings. | //the game constuctor can be used to set some graphics settings. | ||
| − | + | graphics.PreferredBackBufferHeight = 768; | |
graphics.PreferredBackBufferWidth = 1024; | graphics.PreferredBackBufferWidth = 1024; | ||
//graphics.PreferredBackBufferHeight = 1080; | //graphics.PreferredBackBufferHeight = 1080; | ||
| Line 24: | Line 24: | ||
==GameTime== | ==GameTime== | ||
FrameRate and GameTime | FrameRate and GameTime | ||
| + | [http://msdn.microsoft.com/en-us/library/bb203873.aspx#ID2EYB Game Loop Timing] | ||
| + | [http://msdn.microsoft.com/en-us/library/microsoft.xna.framework.gametime_members.aspx Game Time Members] | ||
===Time and Timespan=== | ===Time and Timespan=== | ||
Revision as of 19:21, 18 January 2009
Contents
XNA Structures
Game Class
The XNA Game class has two private properties
- GraphicsDeviceManager graphics;
- ContentManager content;
//the game constuctor can be used to set some graphics settings. graphics.PreferredBackBufferHeight = 768; graphics.PreferredBackBufferWidth = 1024; //graphics.PreferredBackBufferHeight = 1080; //graphics.PreferredBackBufferWidth = 1920; //graphics.IsFullScreen = true;
- Declare SpriteBatch spriteBatch;
- Initialize()
- LoadContent()
- UnloadContent()
- Update(GameTime gameTime)
GameTime
FrameRate and GameTime Game Loop Timing Game Time Members
Time and Timespan
Example of update using GameTime to calculate elapsed time IntroSimpleSpriteUpdateWindows.zip IntroSimpleSpriteWindows/Game1.cs
Understanding GameTime We'll revisit game time when we talk about performance profiling.
- Draw(GameTime gameTime)
Console And Trace
We will build a console class later and debug in game.
Texture2D and SpriteBatches
About textures...
Alpha channels
Demo Gimp http://gimp.org Paint.NET http://www.getpaint.net/
SpriteBacth
demo project IntroSimpleSpriteBatchOptionsWindows.zip
spriteBatch.Begin();
- Options SpriteBlendMode
- Additive Enable additive blending. http://blogs.msdn.com/etayrien/archive/2006/12/19/alpha-blending-part-3.aspx
- AlphaBlend Enable alpha blending. http://blogs.msdn.com/etayrien/archive/2006/12/19/alpha-blending-part-2.aspx
- None No blending specified.
Other Projects
IntroSimpleSpriteUpdateGravityWindows.zip IntroSimpleSpriteUpdateWindows.zip
Homework
XNA Picture
Draw me a picture using an XNA project. The picture should use at least 3 Texture2D objects. The full project and executable are due next week
Please post a web documented screen shot of your executable on you website. The screen shot should have a thumbnail 175 px wide, have you name, the course name, and the name of the picture. The thumbnail will like to a fullsize screen shot.
