scalar_t xf = grabbed_polygon->absolute_x(grab_relative_x, grab_relative_y);
scalar_t yf = grabbed_polygon->absolute_y(grab_relative_x, grab_relative_y);
if (xf < 0 || xf >= world_width || yf < 0 || yf >= world_height) {
scalar_t xf = grabbed_polygon->absolute_x(grab_relative_x, grab_relative_y);
scalar_t yf = grabbed_polygon->absolute_y(grab_relative_x, grab_relative_y);
if (xf < 0 || xf >= world_width || yf < 0 || yf >= world_height) {