[wvxvw]

Matrix - вбить название класса в редакторе, выделить и нажать F1, аналогично Point. tx и ty - смещение матрицы по оси абсцисс и ординат соответственно.

var r:int = 80;
var angle:Number = 0;
var registrationPoint:Point = new Point(r, r);
var rotationStep:Number = Math.PI / 180;
var poligon:Shape = drawPoly(7, r, 0);
 
function drawPoly(corners:int, radius:int, color:uint):Shape
{
	var step:Number = Math.PI / (corners * 0.5);
	var len:Number = Math.PI * 2;
	var i:Number = step;
	var s:Shape = new Shape();
	var g:Graphics = s.graphics;
	g.beginFill(color, 0.2);
	g.lineStyle(1, color, 1, true, LineScaleMode.NONE);
	g.moveTo(radius + radius * Math.cos(i), radius + radius * Math.sin(i));
	while (i <= len)
	{
		g.lineTo(radius + radius * Math.cos(i), radius + radius * Math.sin(i));
		i += step;
	}
	g.endFill();
	g.beginFill(0);
	g.drawCircle(radius, radius, 2);
	s.cacheAsBitmap = true;
	return this.addChild(s) as Shape;
}
 
this.addEventListener(Event.ENTER_FRAME, enterFrameHandler);
 
function enterFrameHandler(event:Event):void
{
	var matrix:Matrix = new Matrix();
	angle += rotationStep;
	angle = angle % (Math.PI * 2);
	matrix.tx -= registrationPoint.x;
	matrix.ty -= registrationPoint.y;
	matrix.rotate(angle);
	matrix.tx += registrationPoint.x;
	matrix.ty += registrationPoint.y;
	poligon.transform.matrix = matrix;
}

Пример