Function CmdTurnRoadVeh

src/roadveh_cmd.cpp:362–393

* Turn a roadvehicle around. * @param flags operation to perform * @param veh_id vehicle ID to turn * @return the cost of this operation or an error */

 * @return the cost of this operation or an error
 */
CommandCost CmdTurnRoadVeh(DoCommandFlags flags, VehicleID veh_id)
{
	RoadVehicle *v = RoadVehicle::GetIfValid(veh_id);
	if (v == nullptr) return CMD_ERROR;

	if (!v->IsPrimaryVehicle()) return CMD_ERROR;

	CommandCost ret = CheckOwnership(v->owner);
	if (ret.Failed()) return ret;

	if (v->vehstatus.Any({VehState::Stopped, VehState::Crashed}) ||
			v->breakdown_ctr != 0 ||
			v->overtaking != 0 ||
			v->state == RVSB_WORMHOLE ||
			v->IsInDepot() ||
			v->current_order.IsType(OT_LOADING)) {
		return CMD_ERROR;
	}

	if (IsNormalRoadTile(v->tile) && GetDisallowedRoadDirections(v->tile) != DRD_NONE) return CMD_ERROR;

	if (IsTileType(v->tile, MP_TUNNELBRIDGE) && DirToDiagDir(v->direction) == GetTunnelBridgeDirection(v->tile)) return CMD_ERROR;

	if (flags.Test(DoCommandFlag::Execute)) {
		v->reverse_ctr = 180;

		/* Unbunching data is no longer valid. */
		v->ResetDepotUnbunching();
	}

	return CommandCost();
}


void RoadVehicle::MarkDirty()