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XNAPresentation

XNA Game Studio 2.0 is a free framework that allows developers to easily create games for Windows and Xbox 360 using C#. The presentation provided an overview of XNA and demonstrated how to implement basic game development elements like graphics, input, collision detection, text, audio, and deployment to Xbox 360. The distribution model was also briefly discussed, noting Microsoft's plans to launch an XBL Community Blade for distributing XNA games.

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XNA Game Studio 2.0 Game Programming Made Easy(ier) Reuben Ahmed [February 12, 2008]
About Me • 7 years of .NET/C# • Minimal game programming experience • Avid video game player – *Not reflected in my XBOX Live gamer score • rahmed@bennettadelson.com
WARNING • Disclaimer: Code shown during this presentation is not meant to be the “right” or “best” way of creating a game. • Purpose: Give you a basic toolset to start off with XNA.
Agenda • What is XNA? • System Requirements • Out of the box architecture • Graphics/Textures • Input • Collision Detection • Text Writing • Audio • XBOX 360 Deployment (!) • Distribution model • Q & A
What is XNA? • X-Platform Next Generation Architecture • C# Game Framework – Windows/XBOX 360 – Reduced learning curve – Compiles to .NET Compact Framework – Available, Approachable, and nearly Free • Sony Playstation 3 Dev. Kit = ~$10,500 • XNA is free on Windows. • $49/4 months or $99/year on XBOX 360.
System Requirements • What is XNA? • System Requirements • Out of the box architecture • Graphics/Textures • Input • Collision Detection • Text Writing • Audio • XBOX 360 Deployment • Distribution model • Q & A
System Requirements • Visual C# 2005 Express Edition, Standard Edition, Professional Edition , Team Edition for Software Architects, Team Edition for Software Developers, Team Edition for Software Testers, Team Edition for Database Professionals , Team Suite • No Visual Studio 2008 support currently! • DirectX 9.0c, Pixel Shader 1.1+ XNA Studio 2.0 and C# Express URL: • http://creators.xna.com/Education/newtoxna.aspx
Out of the box architecture • What is XNA? • System Requirements • Out of the box architecture • Graphics/Textures • Input • Collision Detection • Audio • XBOX 360 Deployment • Distribution model • Q & A
Out of the box architecture • Graphics Device Manager – Automatically sets up interaction with your graphics card • Optimized Game Loop – Update, Draw methods • Content Pipeline – Game Assets (Graphics, Audio, etc.) • DEMO: Our First XNA Game! – Change background color
Graphics/Textures • What is XNA? • System Requirements • Out of the box architecture • Graphics/Textures • Input • Collision Detection • Text Writing • Audio • XBOX 360 Deployment • Distribution model • Q & A
Graphics/Textures – Drawing 1) Add Asset to your project – Drag and drop graphic 2) Load Graphic into variable – Texture2D class – Content Pipeline method • Content.Load <Texture2D> (“AssetName”); 3) Draw it – SpriteBatch class • SpriteBatch.Draw (Texture2D, Position, Color);
• DEMO: Adding a spaceship graphic! • DEMO: Tint graphic with Draw parameter. Graphics/Textures - Demo
• Vector2 class – Holds X and Y position – Can represent Position, Acceleration, Velocity Graphics – 2D Coordinates
• GraphicsDevice.Viewport – Window size properties • DEMO: Centering graphic with Vector2! • Tip: Texture is drawn with upper left as starting point… GraphicsGraphics – Window Size
• DEMO: Scale image with Rectangles. • Tip: Draw order matters! GraphicsGraphics – Scale
Input • What is XNA? • System Requirements • Out of the box architecture • Graphics/Textures • Input • Collision Detection • Text Writing • Audio • XBOX 360 Deployment • Distribution model • Q & A
• Keyboard – Static class • Current state of keyboard • Which keys are pressed • Keys – Enumerator – Represents almost any key! • DEMO: Read input to exit game. Input – Read Keys
• Vector2 – (X,Y) can also represent velocity • Vectors can be added/subtracted… • Vector of (0,0) position + Vector of (5, 2) velocity = new position of (5, 2). Input – Vector2 Velocity
• DEMO: Move ship to right. • DEMO: Use Keyboard to move ship left/right. Input – Vector2 Velocity
Collision Detection • What is XNA? • System Requirements • Out of the box architecture • Graphics/Textures • Input • Collision Detection • Text Writing • Audio • XBOX 360 Deployment • Distribution model • Q & A
• My ship is going off the screen! • First level of collision detection: – Window boundaries – MathHelper class to the rescue… • Clamp() method. • DEMO: MathHelper.Clamp() to boundaries. Collision Detection
• Let’s add an “enemy”…remember: – Texture2D – Vector2 (position) – Vector2 (velocity) – MathHelper.Clamp (Window Boundaries) • DEMO: Add a non-hostile Alien that eerily resembles a Space Invader™! Collision Detection
• Can we shoot a bullet? – Bullet spawns from spaceship position. – Moves vertically up (negative Y direction) • DEMO: Kill it, KILL IT! Collision Detection
• My bullets are too weak! – Rectangles encompass every Texture. – Rectangle.Intersects will help! • DEMO: Encompass the alien and bullet in rectangles, and figure out if they collided… Collision Detection
• 2D Per-Pixel Collision – More expensive, but accurate • Color Key Collision – Detects collision based on color map! Collision Detection, etc.
Text Writing • What is XNA? • System Requirements • Out of the box architecture • Graphics/Textures • Input • Collision Detection • Text Writing • Audio • XBOX 360 Deployment • Distribution model • Q & A
Text Writing • SpriteFont asset • SpriteBatch.DrawString() • DEMO: Keep a bullet hit count label…
Audio • What is XNA? • System Requirements • Out of the box architecture • Graphics/Textures • Input • Collision Detection • Text Writing • Audio • XBOX 360 Deployment • Distribution model • Q & A
Audio • Microsoft Cross Platform Audio Creation Tool – Creates a .XAP “Game Asset” – .WAV files • Classes – audioEngine = new AudioEngine ("ContentAudioPROJECTNAME.xgs"); – waveBank = new WaveBank (audioEngine, "ContentAudioWave Bank.xwb"); – soundBank = new SoundBank (audioEngine, "ContentAudioSound Bank.xsb"); – soundBank.PlayCue (“CUENAME"); • DEMO: Background music. Loop it.
• Change volume level • 3D Spatial audio! Audio, etc.
XBOX 360 Deployment • What is XNA? • System Requirements • Out of the box architecture • Graphics/Textures • Input • Collision Detection • Text Writing • Audio • XBOX 360 Deployment • Distribution model • Q & A
XBOX 360 Deployment • This costs money! • Download XNA Creator’s License ($49 or $99) from the Games Blade. • Download/Launch XNA Game Studio Connect (Free) from the Games Blade. • Generate a key that your PC can use to connect to your XBOX360…this only has to be done once.
XBOX 360 Deployment
XBOX 360 Deployment • Launch XGS Device Center on your PC.
• Your console is now connected! XBOX 360 Deployment
• Either an XBOX 360 Project Type, OR a Windows XNA Project Type can be deployed! • DEMO: Demonstrate “Copy Windows Project to XBOX360 Project” • Projects stay in sync. • DEMO: Add GamePad input handling. Add rumble! XBOX 360 Deployment
• DEMO: …Deploy this thing. – Incremental deployment support! – No wireless deployment. – Your game is now available on the Games Blade! • DEMO: Debugging on XBOX 360… XBOX 360 Deployment
Distribution Model • What is XNA? • System Requirements • Out of the box functionality • Graphics/Textures • Input • Collision Detection • Text Writing • Audio • XBOX 360 Deployment • Distribution model • Q & A
Distribution Model
• XBL currently a managed portfolio • Game Developer’s Conference 2008 – Microsoft prepared to announce XBL Community Blade for XNA. Distribution Model
Tip of the iceberg… • Plethora of XNA Tutorials/Starter Kits • Network Architecture – Client/Server, Peer to Peer, Prediction Code – XBOX Live Profile information • Artificial Intelligence – State Management samples • Speech Recognition/Synthesis – System.Speech .NET 3.0
Tip of the iceberg… • XNA Racing Game: YouTube • 1 week of code (professional game development company) • Jitted on the fly, 1080p, 30 FPS, running on C# (Managed code!), with 2X Anti aliasing! • Graphics power is equated to a $350 PC video card. Anti aliasing…one line of code via XNA.
References • MSDN XNA Game Studio 2.0 – Overview of framework • http://creators.xna.com/ – Active community site • http://www.xnadevelopment.com/ – Beginner tutorials • http://www.phstudios.com/ – Introadvanced tutorials
Q & A • What is XNA? • System Requirements • Out of the box architecture • Graphics/Textures • Input • Collision Detection • Text Writing • Audio • XBOX 360 Deployment • Distribution model • Q & A

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XNAPresentation

  • 1.
    XNA Game Studio2.0 Game Programming Made Easy(ier) Reuben Ahmed [February 12, 2008]
  • 2.
    About Me • 7years of .NET/C# • Minimal game programming experience • Avid video game player – *Not reflected in my XBOX Live gamer score • rahmed@bennettadelson.com
  • 3.
    WARNING • Disclaimer: Codeshown during this presentation is not meant to be the “right” or “best” way of creating a game. • Purpose: Give you a basic toolset to start off with XNA.
  • 4.
    Agenda • What isXNA? • System Requirements • Out of the box architecture • Graphics/Textures • Input • Collision Detection • Text Writing • Audio • XBOX 360 Deployment (!) • Distribution model • Q & A
  • 5.
    What is XNA? •X-Platform Next Generation Architecture • C# Game Framework – Windows/XBOX 360 – Reduced learning curve – Compiles to .NET Compact Framework – Available, Approachable, and nearly Free • Sony Playstation 3 Dev. Kit = ~$10,500 • XNA is free on Windows. • $49/4 months or $99/year on XBOX 360.
  • 6.
    System Requirements • Whatis XNA? • System Requirements • Out of the box architecture • Graphics/Textures • Input • Collision Detection • Text Writing • Audio • XBOX 360 Deployment • Distribution model • Q & A
  • 7.
    System Requirements • VisualC# 2005 Express Edition, Standard Edition, Professional Edition , Team Edition for Software Architects, Team Edition for Software Developers, Team Edition for Software Testers, Team Edition for Database Professionals , Team Suite • No Visual Studio 2008 support currently! • DirectX 9.0c, Pixel Shader 1.1+ XNA Studio 2.0 and C# Express URL: • http://creators.xna.com/Education/newtoxna.aspx
  • 8.
    Out of thebox architecture • What is XNA? • System Requirements • Out of the box architecture • Graphics/Textures • Input • Collision Detection • Audio • XBOX 360 Deployment • Distribution model • Q & A
  • 9.
    Out of thebox architecture • Graphics Device Manager – Automatically sets up interaction with your graphics card • Optimized Game Loop – Update, Draw methods • Content Pipeline – Game Assets (Graphics, Audio, etc.) • DEMO: Our First XNA Game! – Change background color
  • 10.
    Graphics/Textures • What isXNA? • System Requirements • Out of the box architecture • Graphics/Textures • Input • Collision Detection • Text Writing • Audio • XBOX 360 Deployment • Distribution model • Q & A
  • 11.
    Graphics/Textures – Drawing 1)Add Asset to your project – Drag and drop graphic 2) Load Graphic into variable – Texture2D class – Content Pipeline method • Content.Load <Texture2D> (“AssetName”); 3) Draw it – SpriteBatch class • SpriteBatch.Draw (Texture2D, Position, Color);
  • 12.
    • DEMO: Addinga spaceship graphic! • DEMO: Tint graphic with Draw parameter. Graphics/Textures - Demo
  • 13.
    • Vector2 class –Holds X and Y position – Can represent Position, Acceleration, Velocity Graphics – 2D Coordinates
  • 14.
    • GraphicsDevice.Viewport – Windowsize properties • DEMO: Centering graphic with Vector2! • Tip: Texture is drawn with upper left as starting point… GraphicsGraphics – Window Size
  • 15.
    • DEMO: Scaleimage with Rectangles. • Tip: Draw order matters! GraphicsGraphics – Scale
  • 16.
    Input • What isXNA? • System Requirements • Out of the box architecture • Graphics/Textures • Input • Collision Detection • Text Writing • Audio • XBOX 360 Deployment • Distribution model • Q & A
  • 17.
    • Keyboard – Staticclass • Current state of keyboard • Which keys are pressed • Keys – Enumerator – Represents almost any key! • DEMO: Read input to exit game. Input – Read Keys
  • 18.
    • Vector2 – (X,Y)can also represent velocity • Vectors can be added/subtracted… • Vector of (0,0) position + Vector of (5, 2) velocity = new position of (5, 2). Input – Vector2 Velocity
  • 19.
    • DEMO: Moveship to right. • DEMO: Use Keyboard to move ship left/right. Input – Vector2 Velocity
  • 20.
    Collision Detection • Whatis XNA? • System Requirements • Out of the box architecture • Graphics/Textures • Input • Collision Detection • Text Writing • Audio • XBOX 360 Deployment • Distribution model • Q & A
  • 21.
    • My shipis going off the screen! • First level of collision detection: – Window boundaries – MathHelper class to the rescue… • Clamp() method. • DEMO: MathHelper.Clamp() to boundaries. Collision Detection
  • 22.
    • Let’s addan “enemy”…remember: – Texture2D – Vector2 (position) – Vector2 (velocity) – MathHelper.Clamp (Window Boundaries) • DEMO: Add a non-hostile Alien that eerily resembles a Space Invader™! Collision Detection
  • 23.
    • Can weshoot a bullet? – Bullet spawns from spaceship position. – Moves vertically up (negative Y direction) • DEMO: Kill it, KILL IT! Collision Detection
  • 24.
    • My bulletsare too weak! – Rectangles encompass every Texture. – Rectangle.Intersects will help! • DEMO: Encompass the alien and bullet in rectangles, and figure out if they collided… Collision Detection
  • 25.
    • 2D Per-PixelCollision – More expensive, but accurate • Color Key Collision – Detects collision based on color map! Collision Detection, etc.
  • 26.
    Text Writing • Whatis XNA? • System Requirements • Out of the box architecture • Graphics/Textures • Input • Collision Detection • Text Writing • Audio • XBOX 360 Deployment • Distribution model • Q & A
  • 27.
    Text Writing • SpriteFontasset • SpriteBatch.DrawString() • DEMO: Keep a bullet hit count label…
  • 28.
    Audio • What isXNA? • System Requirements • Out of the box architecture • Graphics/Textures • Input • Collision Detection • Text Writing • Audio • XBOX 360 Deployment • Distribution model • Q & A
  • 29.
    Audio • Microsoft CrossPlatform Audio Creation Tool – Creates a .XAP “Game Asset” – .WAV files • Classes – audioEngine = new AudioEngine ("ContentAudioPROJECTNAME.xgs"); – waveBank = new WaveBank (audioEngine, "ContentAudioWave Bank.xwb"); – soundBank = new SoundBank (audioEngine, "ContentAudioSound Bank.xsb"); – soundBank.PlayCue (“CUENAME"); • DEMO: Background music. Loop it.
  • 30.
    • Change volumelevel • 3D Spatial audio! Audio, etc.
  • 31.
    XBOX 360 Deployment •What is XNA? • System Requirements • Out of the box architecture • Graphics/Textures • Input • Collision Detection • Text Writing • Audio • XBOX 360 Deployment • Distribution model • Q & A
  • 32.
    XBOX 360 Deployment •This costs money! • Download XNA Creator’s License ($49 or $99) from the Games Blade. • Download/Launch XNA Game Studio Connect (Free) from the Games Blade. • Generate a key that your PC can use to connect to your XBOX360…this only has to be done once.
  • 33.
  • 34.
    XBOX 360 Deployment •Launch XGS Device Center on your PC.
  • 35.
    • Your consoleis now connected! XBOX 360 Deployment
  • 36.
    • Either anXBOX 360 Project Type, OR a Windows XNA Project Type can be deployed! • DEMO: Demonstrate “Copy Windows Project to XBOX360 Project” • Projects stay in sync. • DEMO: Add GamePad input handling. Add rumble! XBOX 360 Deployment
  • 37.
    • DEMO: …Deploythis thing. – Incremental deployment support! – No wireless deployment. – Your game is now available on the Games Blade! • DEMO: Debugging on XBOX 360… XBOX 360 Deployment
  • 38.
    Distribution Model • Whatis XNA? • System Requirements • Out of the box functionality • Graphics/Textures • Input • Collision Detection • Text Writing • Audio • XBOX 360 Deployment • Distribution model • Q & A
  • 39.
  • 40.
    • XBL currentlya managed portfolio • Game Developer’s Conference 2008 – Microsoft prepared to announce XBL Community Blade for XNA. Distribution Model
  • 41.
    Tip of theiceberg… • Plethora of XNA Tutorials/Starter Kits • Network Architecture – Client/Server, Peer to Peer, Prediction Code – XBOX Live Profile information • Artificial Intelligence – State Management samples • Speech Recognition/Synthesis – System.Speech .NET 3.0
  • 42.
    Tip of theiceberg… • XNA Racing Game: YouTube • 1 week of code (professional game development company) • Jitted on the fly, 1080p, 30 FPS, running on C# (Managed code!), with 2X Anti aliasing! • Graphics power is equated to a $350 PC video card. Anti aliasing…one line of code via XNA.
  • 43.
    References • MSDN XNAGame Studio 2.0 – Overview of framework • http://creators.xna.com/ – Active community site • http://www.xnadevelopment.com/ – Beginner tutorials • http://www.phstudios.com/ – Introadvanced tutorials
  • 44.
    Q & A •What is XNA? • System Requirements • Out of the box architecture • Graphics/Textures • Input • Collision Detection • Text Writing • Audio • XBOX 360 Deployment • Distribution model • Q & A

Editor's Notes

  • #46 Who owns or has played an XBOX 360? Who has done any directX/openGL or graphics development? Performance characteristics of an XBOX 1 can be done XBOX Symbol for development: ms-help://MS.VSCC.v80/MS.VSIPCC.v80/MS.XNAGS.1033/XNA/UsingXNA_XboxProgramming.htm Dream Build Play (2008) http://www.dreambuildplay.com/main/default.aspx Prizes: An invitation to show your entry at GDC 2008. An interview for an internship at Microsoft Research, Lionhead Studios or Rare Ltd in the UK.