Lookup::beam (corrected_slope, thickness, height, 0.0);
right_edge.translate_axis (width-thickness, X_AXIS);
right_edge.translate_axis (corrected_slope * (width-thickness), Y_AXIS);
Lookup::beam (corrected_slope, thickness, height, 0.0);
right_edge.translate_axis (width-thickness, X_AXIS);
right_edge.translate_axis (corrected_slope * (width-thickness), Y_AXIS);