[MrPoma]

public function calcVertex(o:BasicObject):Array{
	var w_2:Number = o.dim_w/2;//полуширина
	var h_2:Number = o.dim_h/2;//полувысота
		
	var r:Number = Math.sqrt(w_2*w_2 + h_2*h_2);//полудиаметр
	var dir:Number = Math.acos(w_2/r)*(180/Math.PI);//угол

	var p:Array = new Array();//вершины обекта

	p[0] = new Vector();
	p[0].x = o.x+Math.cos((o.rotation-dir)*(Math.PI/180))*r;
	p[0].y = o.y+Math.sin((o.rotation-dir)*(Math.PI/180))*r;
		
	p[1] = new Vector();
	p[1].x = o.x+Math.cos((o.rotation-(180-dir*2)-dir)*(Math.PI/180))*r;
	p[1].y = o.y+Math.sin((o.rotation-(180-dir*2)-dir)*(Math.PI/180))*r;
			
	p[2] = new Vector();
	p[2].x = o.x+Math.cos((o.rotation-(180+dir*2)+dir)*(Math.PI/180))*r;
	p[2].y = o.y+Math.sin((o.rotation-(180+dir*2)+dir)*(Math.PI/180))*r;
				
	p[3] = new Vector();
	p[3].x = o.x+Math.cos((o.rotation+dir)*(Math.PI/180))*r;
	p[3].y = o.y+Math.sin((o.rotation+dir)*(Math.PI/180))*r;
			
	return p;
}

код писал давно