Tag Archives: source code

Optimal scrolling for 2D games or UIs

I recently stumbled upon an old bit of code which demonstrates a technique I created for an efficient scrolling data grid on the YouView TV platform. I call it ‘Blit Scrolling’. Below is a demo of the concept – click on the window and use the arrow keys to scroll around (Flash required):
Continue reading Optimal scrolling for 2D games or UIs

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SmoothBitmap – How to ensure Bitmap pixel smoothing in AS3

A common oversight in Flash projects, when using a Bitmap with loaded content is that Flash will revert a Bitmap’s smoothing parameter to false when you replace its bitmapData. That is, when the data loads into the Bitmap, anti-aliasing will get turned off. This is simple enough to fix, but since you may not know if someone is going to replace the bitmapData of a Bitmap you have created – then it’s much better to code defensively for it.

This little SmoothBitmap class is for just such an occasion. Instantiate it like a regular Bitmap and, no matter what another developer does with it, smooth, anti aliased pixels when scaling/rotating will be ensured. Enjoy 🙂

Loan Shark – fast object pooling utility

LoanShark AS3 Object Pooling UtilityA couple of years ago, I created an object pooling utility for a games project I was building in AS3. Since then, I’ve used it quite a few times, in order to speed up apps and improve resource management, easing the load on the garbage collector by reusing objects instead of recreating them. Continue reading Loan Shark – fast object pooling utility

SWFIdle – simple flash idling utility

If you’re still churning out Flash banners, please use this!

swfidleI created this simple utility, called SWFIdle, to enable the Flash Player to lower its CPU usage while the user is not interacting with it. Since it’s possible to have multiple Flash instances embedded in one page (for example, a game and a couple of banners), I recommend using this in your projects, so that Flash instances needn’t fight for CPU and give Flash a worse name than it has already 😉

I know there’s the hasPriority embed attribute now. But:

  • That assumes you have access to the HTML that embeds your SWF
  • If no other players are present, it has no effect
  • There’s still usually little reason to be running your SWF at a high framerate if the user isn’t interacting with it
  • Flash banners with wastefully unoptimised drawing routines are probably one of the key reasons that Flash got poo-pooed off of mobile platforms and disabled on everyone’s laptops – CPU usage = battery usage!