Ioan Lazarciuc's Weblog I program, therefore I exist.

27Feb/090

XNA Streaming – Part 3

After quite a long break, I resume the series of articles on my XNA Streaming project by describing the actual Stream Service component. This component is responsible for transmitting the broadcast information to all connected users.

The information is encoded in (<property name>, <value>) pairs. All serializable data types are supported for values. Users register with the Stream Service either as Broadcaster or as Observer. After this step, the Broadcaster uses the service to send updates for information (property-value pairs). Observers get notified by the service of the updated information via a IXNAStreamCallback callback contract, a feature of WCF services.

26Oct/080

XNA Streaming – Part 2

In part one of this article, I did an overview of the XNA Streaming project. In this part I’m going to describe the File Transfer Service.

The main responsibility of the File Transfer Service is to provide access to streamable games. The service stores the game files in a database table, together with their relative file paths. This way the file system structure can be recreated when downloading the game. The game’s name, author and a short description are also stored in another table.

21Sep/080

XNA Streaming – Part 1

Introduction

As I mentioned in my previous post, at this year's Microsoft Community Bootcamp I entered in the demo competition together with Adi. We've had some issues in the past with (cheap) broadcasting of presentations. There are plenty of professional tools out there that accomplish this goal, but that's not my point. My point is that I have not yet found a cheap (free) utility that will allow me to give a presentation to several viewers that may not be in the same room (or the screen isn't big enough for the whole audience).

Given this background, Adi proposed we create a way in which several people can see the same thing that a broadcaster transmits. Further, the "thing" that everyone sees is actually an XNA game, that could might as well be an interactive presentation in 3D.