if(!t)
                                    {
                                        sim->create_part(-1,x+tx,y+ty,PT_NBOT);
                                        parts[t>>8].tmp = parts[r>>8].tmp;
                                        parts[t>>8].tmp2 = 4;
                                        parts[t>>8].ctype = parts[r>>8].ctype;
                                        parts[i].tmp = 5;
                                    }