for(int i = 0; i < nb_iterations_per_steps; i++) {
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);
for(int i = 0; i < nb_iterations_per_steps; i++) {
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);