Returns a list with the coordinates of the points at the inner edge of a rounded rectangle as tuples.
        e.g.[(x1,y1),(x2,y2)]
        The sorting is counterclockwise starting with the lower left corner.
        Coordinates must be numbers or an exception will be thrown.

def getInnerEdgePoints(self):
        """
        Returns a list with the coordinates of the points at the inner edge of a rounded rectangle as tuples.
        e.g.[(x1,y1),(x2,y2)]
        The sorting is counterclockwise starting with the lower left corner.
        Coordinates must be numbers or an exception will be thrown.
        """
        result = []
        result.append((float(self.get_x()) + float(self.get_rx()), float(self.get_y()) + float(self.get_ry())))
        result.append((float(self.get_x()) + float(self.get_width()) - float(self.get_rx()), float(self.get_y()) + float(self.get_ry())))
        result.append((float(self.get_x()) + float(self.get_width()) - float(self.get_rx()), float(self.get_y()) + float(self.get_height()) - float(self.get_ry())))
        result.append((float(self.get_x()) + float(self.get_rx()), float(self.get_y()) + float(self.get_height()) - float(self.get_ry())))
        return result