[Embed( source="../assets/citybg.png" )]
public var BuildingsBitmap:Class;

[Embed( source="../assets/dog.png" )]
public var DogBitmap:Class;

Is Flex required to make this work? Is there a non-Flex way to do this?

There is a minor bug in your EntityRendering class. The height and width of the viewbox is calculated in the constructor, which means that the height and width doesn’t get calculated, if you set the radius of the object after instantiation of the renderer.

Just to let you know

I am playing around with your game engine, but I don’t seem to be able to get the scrolling background to work. In the recent engine-code you have moved instantiation of the gameworld to the factory, but in this example you are doing it the old way.

Can anyone help me adding a background to the gameworld so that it scrolls along with the camera?

ps. Great great work.

I’ve been following your articles with great interest. I am new to actionscript and game programming and while there are many tutorials/articles on code structure and design, yours is the one that makes the most sense to me and seems the most complete.

I decided to try using your framework (using the version from “Game Object Creation – The Factory Method”) for a new game I have started and have come across a problem I’d like some advice about (in truth its very late at night and my brain has stopped working!). My background consists of large repeating tiles, about 2.5 tiles fill the screen, and my character jumps up platforms climbing ever higher. The problem I have is that during the scrolling movement the tiles come apart (moving at different speeds) and rejoin when the character comes to rest.

At present I don’t know if this is due to the speed of the scrolling or because of the rising and falling motion. I was wondering if you had come across this yourself or if you would have any suggestions as to the root of the problem.

Cheers