One thing you usually recognize about web-based games is that they generally have a fixed view. With a fixed view, your game world matches the web control 1:1. What if you want the game to take place in a larger space, like an entire world, or a galaxy. In the game world, you’d create a viewport or a camera that only displays a portion of the world. Unfortunately, Silverlight doesn’t have native support for viewports into a larger space. We decided to make it.
Source: CanvasViewport C# class
The CanvasViewport is a simple plugin class that can be used to create a viewport on any Canvas (it doesn’t have to be the main page). It works by manipulating the Canvas’ RenderTransform in response to programmed parameters.
// Create a viewport on this canvas.
CanvasViewport _Viewport = new CanvasViewport(this);
// Create a viewport that is 320x240 in logical (original canvas) units
_Viewport.Size = new Size(320, 240);
// Set the center of this viewport to 500, 800 on the canvas
_Viewport.Center = new Point(500, 800);
// In a game, you can have the viewport track a player like this:
_Viewport.Center = _Player.Position;
An added advantage to using viewports in XAML is that since XAML graphics are all vector based, zooming in and out dosen’t have all of the pixelation problems that working with raster graphics has. Here’s the orignal game without the viewport.
Have fun with your viewports.
A full breakout clone with source. The demo features 9 levels loaded from embedded XML. There is also an “attract” mode which makes for a nice screen saver.
We also wrote a level editor in WPF because it was so similar to Silverlight. The editor can be released upon request.
Silverlight 1.1 – C#Administrator – November 7, 2007
Administrator – November 1, 2007
Dan Dobbs – November 1, 2007
We wanted to start exploring some game development with Silverlight so we started where one should start… good ol’ Pong! Then with the functionality in place we couldn’t help but skin it with some nice imagery of a beat-up ping pong table. Enjoy!
This is our first 1.1 example and we plan on doing more as time allows so check back often.
and for the Javscript folks, here’s the 1.0 version…