Silverlight 2 Beta Performance

The Silverlight 2 Beta runs rings around the Silverlight 2 Alpha. However, the lack of hardware acceleration is very noticable (and relevant to an Image-oriented application like Legend of the Greasepole) when running at higher resolutions. For a little perspective: In 1998, the first version of Legend of the Greasepole was released. Platform: Windows PC (95, 98, [...]

Are your CLR-based apps leaking?

I can’t resist linking to a superb article in the WPF Performance blog on finding memory leaks in WPF-based applications. Particularly interesting is the section pertaining to Event Handler-based leaks. Here’s the brief summary, from the article: In general, if you do this: Foo.SomeEvent += new EventHandler(Bar.SomeMethod) Then when you done using Bar, but you are [...]

XNA Game Studio 2.0 Released

Well, the next version of XNA Game Studio is released. Download it here.

What’s New with XNA Game Studio?

  • XNA Game Studio 2.0 works in all versions of Visual Studio 2005. This includes Standard and Professional, as well as many other specific editions.
  • The new and improved interface makes it easier for you to manage your Xbox 360 console.
  • You’ll find that managing and building content is easier and more consistent in XNA Game Studio.
  • We’ve included project templates for content importers and processors.
  • You can configure how content is processed with the new ability to set parameters on Content Processors.

What’s new in the XNA Framework? Now you can:

  • Create rich multiplayer games over Xbox LIVE using the new networking APIs.
  • Create Audio more effectively with the new XACT editor!
  • Host XNA Framework games easily inside a Windows Form.
  • Use the virtualized GraphicsDevice: no more special code to handle device reset and recreate!
  • Take advantage of render targets that are more flexible, consistent, and easier to use. Xbox 360 and Windows now support multiple render targets (MRTs) as well.
  • Easily nest one component inside another thanks to improvements in GameComponent.
  • Enjoy many more enhancements and tweaks!

Farseer Physics Engine for XNA and Silverlight (And .NET in General)

The Farseer Physics Engine is an easy to use 2D physics engine designed for Microsoft’s XNA and Silverlight platforms. The Farseer Physics Engine focuses on simplicity, useful features, and enabling the creation of fun, dynamic games.


  • General
    • Easy To Use!
    • Support for XNA (XBOX 360 and Windows)
    • Support for Silverlight (1.1 and above)
    • Support for Managed .Net Languages In General
  • Collison
    • Concave and Convex Polygons Supported
    • Multiple Collision Geometries Per Body
    • Collision Categories For Complex Interaction Between Physics Objects
    • Collision Callback Mechanism
  • Dynamics
    • Joints
      • Revolute Joint (body to body or fixed to world)
      • Angle Joint (body to body or fixed to world)
      • Slider (Prismatic) Joint
      • Pin (Distance) Joint
    • Force Controllers
      • Linear Spring
      • Angular Spring
      • Easy To Build Custom Force Controllers (Explosions, Steering Behaviors, etc.)
  • Support and Debugging
    • Samples Framework With Samples Covering Most Major Engine Features. (XNA and Silverlight versions)
    • Debug Viewer To View All Major Physics Objects (part of samples framework)
    • User Manual (in progress)

Interview from InfoQ

Although intended for games, a physics engine can be used for UI effects too. This would generally be very useful to create cool effects, especially on Silverlight applications.