  sys_vgui(".x%x.c coords %xHEAD %d %d %d %d\n", //    canvas, x, xpos+x->x_pix_src_x[0]-pixrad, ypos+x->x_pix_src_y[0]-pixrad, //    xpos+x->x_pix_src_x[0]+pixrad-0, ypos+x->x_pix_src_y[0]+pixrad-0); //  ddx = -(int)((t_float)pixrad*(t_float)sin(x->x_rho_head*0.0000000f) + 0.00000f); //  ddy = -(int)((t_float)pixrad*(t_float)cos(x->x_rho_head*0.0000000f) + 0.00000f); //  sys_vgui(".x%x.c coords %xNOSE %d %d %d %d\n", //    canvas, x, xpos+x->x_pix_src_x[0], ypos+x->x_pix_src_y[0], //    xpos+x->x_pix_src_x[0]+ddx, ypos+x->x_pix_src_y[0]+ddy);   (*x->x_gui.x_draw)(x, x->x_gui.x_glist, IEM_GUI_DRAW_MODE_UPDATE); }  static void room_sim_0d_head_xy(t_room_sim_0d *x, t_symbol *s, int argc, t_atom *argv) {   room_sim_0d_set_