I have been building a new game called Pumpkin Man. It is an AS3 tile-based, Pacman variant. I have been putting special emphasis on the game display engine to ensure future that AS3 games I create can make use of it. I have created an engine that uses one display object (a sprite) to display the entire game. This sprite contains one Bitmap object, and one BitmapData object (inside the Bitmap). The tiles, the background, the power ups and and all game characters are redrawn each frame into this one Bitmap Data object. This eliminates the need for the rendering engine to constantly update the math necessary to move vectors, and the movie has just one redraw region. The result (so far) is a fast, slick display engine. The problem is that many of the easy things you can do with MovieClips, such as rotation around the center point, scaling, etc are not as easy to accomplish because the game characters are not drawn within their own display objects. What follows ia an example of how I solved one such problem: Rotation around a center point.
