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C# Game Development with XNA. Philip Degarmo. Introduction. What is XNA? Microsoft’s replacement for “Managed DirectX” “XNA” = “XNA Game Studio” – de facto but wrong All VS SKUs supported (including express) Only C# supported Who am I? Texas A&M 5 th year senior CS major

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Presentation Transcript
introduction
Introduction
  • What is XNA?
    • Microsoft’s replacement for “Managed DirectX”
    • “XNA” = “XNA Game Studio” – de facto but wrong
    • All VS SKUs supported (including express)
    • Only C# supported
  • Who am I?
    • Texas A&M 5th year senior CS major
    • Lead Developer for a Microsoft DreamBuildPlay finalist game, “Sprockets of Strife”
      • http://www.teamsprockets.com
purpose of xna
Purpose of XNA
  • Make game development easier and faster for the hobbyist developer
basic features
Basic Features
  • XBOX*/Windows cross-platform abstraction
    • Graphics
    • Sound
    • Input
    • Networking
    • and many other things
  • Limited Zune Support (3.0 preview only)
  • XBOX Live Publishing
    • “Community Games”
    • Commercial
  • * - XBOX development costs $99/year or $49/4 months. PC development and all tools are completely free.
setup
Setup
  • Download from creators.xna.com
  • Run the installer
  • XNA Game Studio 2.0 requires VS 2005 SP1, any SKU (including express)
  • XNA Game Studio 3.0 preview requires 2008, any SKU (including express)
how can xna be used
How can XNA be used?
  • Visualization
  • GPGPU
  • Skill Building
visualization
Visualization
  • Very easy to integrate your C# code into an XNA application
  • Possible to integrate with .net Windows Forms
gpgpu
GPGPU
  • General purpose use of the GPU
    • Massively parallel stream processing
    • Becoming more common in everyday desktop computers
  • XNA Graphics is a very thin abstraction
    • API calls are fairly direct
    • API calls closely mirror C++/DirectX
    • HLSL is compiled and runs on the GPU
    • MUCH easier to play with the GPU than it is in C++
getting skills
Getting Skills
  • Practice with performance-sensitive C#
  • Opportunities to learn some very cool algorithms
    • Spatial Partitioning (BSP/Octrees)
    • Path Finding
  • Portfolio work
xna shortcommings
XNA Shortcommings
  • XBOX Performance
    • 4 cores.. 3.2 GHz.. No problem right?
    • No out-of-order execution
    • Compact framework GC, stiffer penalties for collection and creation
      • Object pools can alleviate this
    • Inlining isn’t as good as PC
      • Manual inlining can potentially yield a major speed improvement in a pinch
outlook
Outlook
  • Adoption by games industry
    • Some in tools, casual games
    • No big $$$$ games – but that’s not XNA’s purpose!
  • Long term support
    • Replaces “Managed DirectX”
resources
Resources
  • aclysma at gmail dot com
  • http://creators.xna.com/
  • http://forums.xna.com/