10 Oct: Matrix rotation

I found a nice article of 8bitrocket on how to create a rotated bitmap of a DisplayObject. This works nice if the source is a square but with objects with different width and height values it's a bit tricky. (it could be that I didn't see the solution but it's a huge article).

 

The code for a square:

var matrix:Matrix = new Matrix();
matrix.translate(-16,-16);
matrix.rotate( -90 * (Math.PI / 180 ));
matrix.translate(16,16);
var matriximage:BitmapData = new BitmapData(32, 32, true, 0x00000000);
matriximage.draw(displayObject, matrix);

For a non-square it is:

var matrix:Matrix = new Matrix();
matrix.translate(-100,-10);
matrix.rotate( -90 * (Math.PI / 180) );
matrix.translate(10,100);
var matriximage:BitmapData = new BitmapData(32, 32, true, 0x00000000);
matriximage.draw(displayObject, matrix);

As you can see the width and the height are switched at the second translate.