Difference between revisions of "Game Programming Class2"
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===Time and Timespan=== | ===Time and Timespan=== | ||
| − | Example of update using GameTime to calculate elapsed time IntroSimpleSpriteUpdateWindows.zip | + | Example of update using GameTime to calculate elapsed time |
| − | IntroSimpleSpriteWindows/Game1.cs | + | |
| + | *IntroSimpleSpriteUpdateWindows.zip | ||
| + | *IntroSimpleSpriteWindows/Game1.cs | ||
Understanding GameTime We'll revisit game time when we talk about performance profiling. | Understanding GameTime We'll revisit game time when we talk about performance profiling. | ||
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We will build a console class later and debug in game. | We will build a console class later and debug in game. | ||
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==Texture2D and SpriteBatches== | ==Texture2D and SpriteBatches== | ||
Revision as of 19:22, 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.
