Difference between revisions of "Game Programming Class1"

Revision as of 19:14, 18 January 2009

Discuss Syllabus

Software

• Visual Studio 2008 available from MSDN
• XNA 4.0 GSE http://creators.xna.com/en-US/downloads
• Direct X SDK http://msdn.microsoft.com/en-us/directx/aa937788.aspx

What is XNA?

Discussion
Why do we need it?

Why not use c++?

What is DirectX?

show c++ examples

quick start guide - create

Hello World

Hello World in XNA 3.0 using spritefont. We'll revisit the spritefont when we build the console/debug class

in class

Simple 2D texture demo

Simple xna project that draws a pacman sprite

Demo

• Start a new XNA Project

Add two variable declarations at the top of the class

            Texture2D PacMan;
            Vector2 PacManLoc;

In the Load_Content Funtion add the following code to initialize the two variables declared above

        protected override void LoadContent()
        {
            // Create a new SpriteBatch, which can be used to draw textures.
            spriteBatch = new SpriteBatch(GraphicsDevice);

            // TODO: use this.Content to load your game content here
            PacMan = Content.Load<texture2d>("pacmanSingle");
            PacManLoc = new Vector2(graphics.GraphicsDevice.Viewport.Width / 2, graphics.GraphicsDevice.Viewport.Height / 2);
        }

• Add the following code to the Draw Method to Draw the texture

	protected override void Draw(GameTime gameTime)
        {
            graphics.GraphicsDevice.Clear(Color.CornflowerBlue);

            // TODO: Add your drawing code here
            spriteBatch.Begin();
            spriteBatch.Draw(PacMan, PacManLoc, Color.White);
            spriteBatch.End();

            base.Draw(gameTime);
        }

pacman image is availble here

the full game1.cs file should look like

[http://brookfield.rice.iit.edu/jmeyers/gbrowser.php?file=/ITM496-595/ClassSource/Projects/IntroSimpleSpriteWindows/IntroSimpleSpriteWindows/Game1.cs IntroSimpleSpriteWindows/Game1.cs]

the build of the game will look like

Simple 2D texture example with update