Asteroid « Effects « Flash Tutorials

1. 8bitrocket:Tutorial: Using Flash CS3 and Actionscript 3 to create Atari 7800 Asteroids Part 1    8bitrocket.com

1. Pre-calculating and storing rotation and thrust delta x and delta y values in an array (so they don't need to be calculated on the fly) 2. Pre-caching sprite rotation animations in an array of BitmapData objects 3. Using one display object to "blit" (bit block transfer) all graphic images to.