def METHOD_NAME(self, gc, face_col, points, ox, oy):
    gc.set_fill_color(tuple(face_col))
    gc.begin_path()
    startx, starty = points[0]
    gc.move_to(startx, oy)
    gc.line_to(startx, starty)
    gc.lines(points)
    endx, endy = points[-1]
    gc.line_to(endx, oy)
    gc.line_to(startx, oy)
    gc.close_path()
    gc.fill_path()