box.add_point (Offset(bottom_points[i][X_AXIS],
bottom_points[i + 1][Y_AXIS]) - hvpadding);
box.add_point (top_points[i + 1] + hvpadding);
box.add_point (Offset(bottom_points[i][X_AXIS],
bottom_points[i + 1][Y_AXIS]) - hvpadding);
box.add_point (top_points[i + 1] + hvpadding);