int xc = int(_eye_x), yc = int(_eye_y);
window->draw_line(xc - _width/2, yc - _height/2, xc + _width/2, yc - _height/2);
window->draw_line(xc + _width/2, yc - _height/2, xc + _width/2, yc + _height/2);
int xc = int(_eye_x), yc = int(_eye_y);
window->draw_line(xc - _width/2, yc - _height/2, xc + _width/2, yc - _height/2);
window->draw_line(xc + _width/2, yc - _height/2, xc + _width/2, yc + _height/2);