# File lib/rvg/misc.rb, line 643
                def rotate(degrees)
                    degrees = Magick::RVG.convert_one_to_float(degrees)
                    @gc.rotate(degrees)
                    @sx =  Math.cos(GraphicContext.degrees_to_radians(degrees))
                    @rx =  Math.sin(GraphicContext.degrees_to_radians(degrees))
                    @ry = -Math.sin(GraphicContext.degrees_to_radians(degrees))
                    @sy =  Math.cos(GraphicContext.degrees_to_radians(degrees))
                    concat_matrix()
                    nil
                end