zero point nine

An image fade/dissolve where the individual pixels move off the bitmap and disappear. Written a couple months ago to learn how to get around in AS3. Not to be confused with the built-in BitmapData.pixelDissolve method.

In the supplied AS3 class, the direction of the movement of pixels is ‘hard coded’ to go from right to left. (Here’s the full project, as well.) To move the pixels in the opposite direction or up and down, the bitmap is rotated 90, 180, or 270 degrees and the wrapper sprite is rotated equally in the opposite direction – which is possible to interpret as a kludge.

To-do: Change the method used to select pixels that are to be animated. The way it’s done now is inefficient. If you look at the code, you’ll see what I mean. Again, if anyone wants to post any changes to the class that improves performance, please do.

Some other possible to-do’s: Dissolve images in an arbitrary direction; allow pixels to trail beyond the current boundaries of the bitmap; allow for the changing of parameter variables’ values while the effect is in progress; support for transparency.

Eating away individual pixels of a bitmap similar to what’s done here, it seems to me, could be the basis for some fun retro gameplay mechanics for a Flash-based game, à la Lemmings or Worms.

Version: 0.9

Licensed under a Creative Commons Attribution 3.0 License.

This entry was posted on Saturday, April 7th, 2007 at 8:23 pm and is filed under flash, sourcecode. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.