title: Rotating groups of images in AS3
body: <p>I'm working on a 2d, top-down helicopter game that poses a unique (to me at least) challenge and I'm hoping the stack community can offer some suggestions.  I need the helicopters to be able to rotate, as well as the door guns being able to rotate.  If I put them in a movieclip, then it's not problem and life is beautiful, but I'm putting this together for iOS and movieclips don't play well.  So, I need to use bitmaps.  What are your suggestions for how to track the "mounting points" for the door guns when the helicopter rotates and translate the guns in 2d as well as rotating them?  Thanks in advance for any suggestions (except "google it"- I've done that quite a bit)</p>