I was wanting a lightweight function to resize, rotate, and skew DisplayObjects based on a dynamic registration point so I made a function to apply my desired matrix settings.

One thing that bothers me is that I could not figure out how to skew along the X and Y axis at the same time. When I do set "c" and "b" Matrix properties, one of the skewed axis does not skew parallel like it should. And if I concatenate separate skew Matrices, the last concatenated skew Matrix transforms correctly but not the one before it. I'm trying to avoid using nested DisplayObjects to perform the separate X and Y skews, but that looks like an option I will have to use.

"Drag and Drop" behavior is easy to do in ActionScript, but sometimes it would be cooler if you could limit or constrain the dragging movement of an object to a line. This opens the door for implementing
more creative interaction design...

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If you use Photoshop you probably appreciate the "Constrain Proportions" checkbox found in some of the application's dialogs and menus.

I like to have this same ability when I'm writing ActionScript to resize objects proportionately too.
Here I use the functions to set the sizes so when I set width, height is changed accordingly.
The same for setting height, the width is changed accordingly.

*Note: I set the inputs to limit the width and height to 500.

Here are two functions for performing proportional resizing by both width and height...
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