ai_order.cpp

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00001 /* $Id: ai_order.cpp 18860 2010-01-18 14:32:47Z yexo $ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
00006  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
00008  */
00009 
00012 #include "ai_vehicle.hpp"
00013 #include "../ai_instance.hpp"
00014 #include "../../debug.h"
00015 #include "../../vehicle_base.h"
00016 #include "../../roadstop_base.h"
00017 #include "../../depot_base.h"
00018 #include "../../station_base.h"
00019 #include "../../waypoint_base.h"
00020 
00026 static OrderType GetOrderTypeByTile(TileIndex t)
00027 {
00028   if (!::IsValidTile(t)) return OT_END;
00029 
00030   switch (::GetTileType(t)) {
00031     default: break;
00032     case MP_STATION:
00033       if (IsBuoy(t) || IsRailWaypoint(t)) return OT_GOTO_WAYPOINT;
00034       if (IsHangar(t)) return OT_GOTO_DEPOT;
00035       return OT_GOTO_STATION;
00036       break;
00037     case MP_WATER:   if (::IsShipDepot(t)) return OT_GOTO_DEPOT; break;
00038     case MP_ROAD:    if (::GetRoadTileType(t) == ROAD_TILE_DEPOT) return OT_GOTO_DEPOT; break;
00039     case MP_RAILWAY:
00040       if (IsRailDepot(t)) return OT_GOTO_DEPOT;
00041       break;
00042   }
00043 
00044   return OT_END;
00045 }
00046 
00047 /* static */ bool AIOrder::IsValidVehicleOrder(VehicleID vehicle_id, OrderPosition order_position)
00048 {
00049   return AIVehicle::IsValidVehicle(vehicle_id) && order_position >= 0 && (order_position < ::Vehicle::Get(vehicle_id)->GetNumOrders() || order_position == ORDER_CURRENT);
00050 }
00051 
00057 static const Order *ResolveOrder(VehicleID vehicle_id, AIOrder::OrderPosition order_position)
00058 {
00059   const Vehicle *v = ::Vehicle::Get(vehicle_id);
00060   if (order_position == AIOrder::ORDER_CURRENT) {
00061     const Order *order = &v->current_order;
00062     if (order->GetType() == OT_GOTO_DEPOT && !(order->GetDepotOrderType() & ODTFB_PART_OF_ORDERS)) return order;
00063     order_position = AIOrder::ResolveOrderPosition(vehicle_id, order_position);
00064     if (order_position == AIOrder::ORDER_INVALID) return NULL;
00065   }
00066   return v->GetOrder(order_position);
00067 }
00068 
00069 /* static */ bool AIOrder::IsGotoStationOrder(VehicleID vehicle_id, OrderPosition order_position)
00070 {
00071   if (!IsValidVehicleOrder(vehicle_id, order_position)) return false;
00072 
00073   const Order *order = ::ResolveOrder(vehicle_id, order_position);
00074   return order != NULL && order->GetType() == OT_GOTO_STATION;
00075 }
00076 
00077 /* static */ bool AIOrder::IsGotoDepotOrder(VehicleID vehicle_id, OrderPosition order_position)
00078 {
00079   if (!IsValidVehicleOrder(vehicle_id, order_position)) return false;
00080 
00081   const Order *order = ::ResolveOrder(vehicle_id, order_position);
00082   return order != NULL && order->GetType() == OT_GOTO_DEPOT;
00083 }
00084 
00085 /* static */ bool AIOrder::IsGotoWaypointOrder(VehicleID vehicle_id, OrderPosition order_position)
00086 {
00087   if (!IsValidVehicleOrder(vehicle_id, order_position)) return false;
00088 
00089   const Order *order = ::ResolveOrder(vehicle_id, order_position);
00090   return order != NULL && order->GetType() == OT_GOTO_WAYPOINT;
00091 }
00092 
00093 /* static */ bool AIOrder::IsConditionalOrder(VehicleID vehicle_id, OrderPosition order_position)
00094 {
00095   if (order_position == ORDER_CURRENT) return false;
00096   if (!IsValidVehicleOrder(vehicle_id, order_position)) return false;
00097 
00098   const Order *order = Vehicle::Get(vehicle_id)->GetOrder(order_position);
00099   return order->GetType() == OT_CONDITIONAL;
00100 }
00101 
00102 /* static */ bool AIOrder::IsCurrentOrderPartOfOrderList(VehicleID vehicle_id)
00103 {
00104   if (AIVehicle::IsValidVehicle(vehicle_id)) return false;
00105   if (GetOrderCount(vehicle_id) == 0) return false;
00106 
00107   const Order *order = &::Vehicle::Get(vehicle_id)->current_order;
00108   if (order->GetType() != OT_GOTO_DEPOT) return true;
00109   return (order->GetDepotOrderType() & ODTFB_PART_OF_ORDERS) != 0;
00110 }
00111 
00112 /* static */ AIOrder::OrderPosition AIOrder::ResolveOrderPosition(VehicleID vehicle_id, OrderPosition order_position)
00113 {
00114   if (!AIVehicle::IsValidVehicle(vehicle_id)) return ORDER_INVALID;
00115 
00116   if (order_position == ORDER_CURRENT) return (AIOrder::OrderPosition)::Vehicle::Get(vehicle_id)->cur_order_index;
00117   return (order_position >= 0 && order_position < ::Vehicle::Get(vehicle_id)->GetNumOrders()) ? order_position : ORDER_INVALID;
00118 }
00119 
00120 
00121 /* static */ bool AIOrder::AreOrderFlagsValid(TileIndex destination, AIOrderFlags order_flags)
00122 {
00123   OrderType ot = (order_flags & AIOF_GOTO_NEAREST_DEPOT) ? OT_GOTO_DEPOT : ::GetOrderTypeByTile(destination);
00124   switch (ot) {
00125     case OT_GOTO_STATION:
00126       return (order_flags & ~(AIOF_NON_STOP_FLAGS | AIOF_UNLOAD_FLAGS | AIOF_LOAD_FLAGS)) == 0 &&
00127           /* Test the different mutual exclusive flags. */
00128           ((order_flags & AIOF_TRANSFER)      == 0 || (order_flags & AIOF_UNLOAD)    == 0) &&
00129           ((order_flags & AIOF_TRANSFER)      == 0 || (order_flags & AIOF_NO_UNLOAD) == 0) &&
00130           ((order_flags & AIOF_UNLOAD)        == 0 || (order_flags & AIOF_NO_UNLOAD) == 0) &&
00131           ((order_flags & AIOF_UNLOAD)        == 0 || (order_flags & AIOF_NO_UNLOAD) == 0) &&
00132           ((order_flags & AIOF_NO_UNLOAD)     == 0 || (order_flags & AIOF_NO_LOAD)   == 0) &&
00133           ((order_flags & AIOF_FULL_LOAD_ANY) == 0 || (order_flags & AIOF_NO_LOAD)   == 0);
00134 
00135     case OT_GOTO_DEPOT:
00136       return (order_flags & ~(AIOF_NON_STOP_FLAGS | AIOF_DEPOT_FLAGS)) == 0 &&
00137           ((order_flags & AIOF_SERVICE_IF_NEEDED) == 0 || (order_flags & AIOF_STOP_IN_DEPOT) == 0);
00138 
00139     case OT_GOTO_WAYPOINT: return (order_flags & ~(AIOF_NON_STOP_FLAGS)) == 0;
00140     default:               return false;
00141   }
00142 }
00143 
00144 /* static */ bool AIOrder::IsValidConditionalOrder(OrderCondition condition, CompareFunction compare)
00145 {
00146   switch (condition) {
00147     case OC_LOAD_PERCENTAGE:
00148     case OC_RELIABILITY:
00149     case OC_MAX_SPEED:
00150     case OC_AGE:
00151       return compare >= CF_EQUALS && compare <= CF_MORE_EQUALS;
00152 
00153     case OC_REQUIRES_SERVICE:
00154       return compare == CF_IS_TRUE || compare == CF_IS_FALSE;
00155 
00156     case OC_UNCONDITIONALLY:
00157       return true;
00158 
00159     default: return false;
00160   }
00161 }
00162 
00163 /* static */ int32 AIOrder::GetOrderCount(VehicleID vehicle_id)
00164 {
00165   return AIVehicle::IsValidVehicle(vehicle_id) ? ::Vehicle::Get(vehicle_id)->GetNumOrders() : -1;
00166 }
00167 
00168 /* static */ TileIndex AIOrder::GetOrderDestination(VehicleID vehicle_id, OrderPosition order_position)
00169 {
00170   if (!IsValidVehicleOrder(vehicle_id, order_position)) return INVALID_TILE;
00171 
00172   const Order *order = ::ResolveOrder(vehicle_id, order_position);
00173   if (order == NULL || order->GetType() == OT_CONDITIONAL) return INVALID_TILE;
00174   const Vehicle *v = ::Vehicle::Get(vehicle_id);
00175 
00176   switch (order->GetType()) {
00177     case OT_GOTO_DEPOT: {
00178       /* We don't know where the nearest depot is... (yet) */
00179       if (order->GetDepotActionType() & ODATFB_NEAREST_DEPOT) return INVALID_TILE;
00180 
00181       if (v->type != VEH_AIRCRAFT) return ::Depot::Get(order->GetDestination())->xy;
00182       /* Aircraft's hangars are referenced by StationID, not DepotID */
00183       const Station *st = ::Station::Get(order->GetDestination());
00184       if (st->GetAirportSpec()->nof_depots == 0) return INVALID_TILE;
00185       return st->GetHangarTile(0);
00186     }
00187 
00188     case OT_GOTO_STATION: {
00189       const Station *st = ::Station::Get(order->GetDestination());
00190       if (st->train_station.tile != INVALID_TILE) {
00191         for (uint i = 0; i < st->train_station.w; i++) {
00192           TileIndex t = st->train_station.tile + TileDiffXY(i, 0);
00193           if (st->TileBelongsToRailStation(t)) return t;
00194         }
00195       } else if (st->dock_tile != INVALID_TILE) {
00196         return st->dock_tile;
00197       } else if (st->bus_stops != NULL) {
00198         return st->bus_stops->xy;
00199       } else if (st->truck_stops != NULL) {
00200         return st->truck_stops->xy;
00201       } else if (st->airport_tile != INVALID_TILE) {
00202         const AirportSpec *as = st->GetAirportSpec();
00203         TILE_LOOP(tile, as->size_x, as->size_y, st->airport_tile) {
00204           if (!::IsHangar(tile)) return tile;
00205         }
00206       }
00207       return INVALID_TILE;
00208     }
00209     case OT_GOTO_WAYPOINT: return ::Waypoint::Get(order->GetDestination())->xy;
00210     default:               return INVALID_TILE;
00211   }
00212 }
00213 
00214 /* static */ AIOrder::AIOrderFlags AIOrder::GetOrderFlags(VehicleID vehicle_id, OrderPosition order_position)
00215 {
00216   if (!IsValidVehicleOrder(vehicle_id, order_position)) return AIOF_INVALID;
00217 
00218   const Order *order = ::ResolveOrder(vehicle_id, order_position);
00219   if (order == NULL || order->GetType() == OT_CONDITIONAL) return AIOF_INVALID;
00220 
00221   AIOrderFlags order_flags = AIOF_NONE;
00222   order_flags |= (AIOrderFlags)order->GetNonStopType();
00223   switch (order->GetType()) {
00224     case OT_GOTO_DEPOT:
00225       if (order->GetDepotOrderType() & ODTFB_SERVICE) order_flags |= AIOF_SERVICE_IF_NEEDED;
00226       if (order->GetDepotActionType() & ODATFB_HALT) order_flags |= AIOF_STOP_IN_DEPOT;
00227       if (order->GetDepotActionType() & ODATFB_NEAREST_DEPOT) order_flags |= AIOF_GOTO_NEAREST_DEPOT;
00228       break;
00229 
00230     case OT_GOTO_STATION:
00231       order_flags |= (AIOrderFlags)(order->GetLoadType()   << 5);
00232       order_flags |= (AIOrderFlags)(order->GetUnloadType() << 2);
00233       break;
00234 
00235     default: break;
00236   }
00237 
00238   return order_flags;
00239 }
00240 
00241 /* static */ AIOrder::OrderPosition AIOrder::GetOrderJumpTo(VehicleID vehicle_id, OrderPosition order_position)
00242 {
00243   if (!IsValidVehicleOrder(vehicle_id, order_position)) return ORDER_INVALID;
00244   if (order_position == ORDER_CURRENT || !IsConditionalOrder(vehicle_id, order_position)) return ORDER_INVALID;
00245 
00246   const Order *order = Vehicle::Get(vehicle_id)->GetOrder(order_position);
00247   return (OrderPosition)order->GetConditionSkipToOrder();
00248 }
00249 
00250 /* static */ AIOrder::OrderCondition AIOrder::GetOrderCondition(VehicleID vehicle_id, OrderPosition order_position)
00251 {
00252   if (!IsValidVehicleOrder(vehicle_id, order_position)) return OC_INVALID;
00253   if (order_position == ORDER_CURRENT || !IsConditionalOrder(vehicle_id, order_position)) return OC_INVALID;
00254 
00255   const Order *order = Vehicle::Get(vehicle_id)->GetOrder(order_position);
00256   return (OrderCondition)order->GetConditionVariable();
00257 }
00258 
00259 /* static */ AIOrder::CompareFunction AIOrder::GetOrderCompareFunction(VehicleID vehicle_id, OrderPosition order_position)
00260 {
00261   if (!IsValidVehicleOrder(vehicle_id, order_position)) return CF_INVALID;
00262   if (order_position == ORDER_CURRENT || !IsConditionalOrder(vehicle_id, order_position)) return CF_INVALID;
00263 
00264   const Order *order = Vehicle::Get(vehicle_id)->GetOrder(order_position);
00265   return (CompareFunction)order->GetConditionComparator();
00266 }
00267 
00268 /* static */ int32 AIOrder::GetOrderCompareValue(VehicleID vehicle_id, OrderPosition order_position)
00269 {
00270   if (!IsValidVehicleOrder(vehicle_id, order_position)) return -1;
00271   if (order_position == ORDER_CURRENT || !IsConditionalOrder(vehicle_id, order_position)) return -1;
00272 
00273   const Order *order = Vehicle::Get(vehicle_id)->GetOrder(order_position);
00274   int32 value = order->GetConditionValue();
00275   if (order->GetConditionVariable() == OCV_MAX_SPEED) value = value * 16 / 10;
00276   return value;
00277 }
00278 
00279 /* static */ bool AIOrder::SetOrderJumpTo(VehicleID vehicle_id, OrderPosition order_position, OrderPosition jump_to)
00280 {
00281   EnforcePrecondition(false, IsValidVehicleOrder(vehicle_id, order_position));
00282   EnforcePrecondition(false, order_position != ORDER_CURRENT && IsConditionalOrder(vehicle_id, order_position));
00283   EnforcePrecondition(false, IsValidVehicleOrder(vehicle_id, jump_to) && jump_to != ORDER_CURRENT);
00284 
00285   return AIObject::DoCommand(0, vehicle_id | (order_position << 16), MOF_COND_DESTINATION | (jump_to << 4), CMD_MODIFY_ORDER);
00286 }
00287 
00288 /* static */ bool AIOrder::SetOrderCondition(VehicleID vehicle_id, OrderPosition order_position, OrderCondition condition)
00289 {
00290   EnforcePrecondition(false, IsValidVehicleOrder(vehicle_id, order_position));
00291   EnforcePrecondition(false, order_position != ORDER_CURRENT && IsConditionalOrder(vehicle_id, order_position));
00292   EnforcePrecondition(false, condition >= OC_LOAD_PERCENTAGE && condition <= OC_UNCONDITIONALLY);
00293 
00294   return AIObject::DoCommand(0, vehicle_id | (order_position << 16), MOF_COND_VARIABLE | (condition << 4), CMD_MODIFY_ORDER);
00295 }
00296 
00297 /* static */ bool AIOrder::SetOrderCompareFunction(VehicleID vehicle_id, OrderPosition order_position, CompareFunction compare)
00298 {
00299   EnforcePrecondition(false, IsValidVehicleOrder(vehicle_id, order_position));
00300   EnforcePrecondition(false, order_position != ORDER_CURRENT && IsConditionalOrder(vehicle_id, order_position));
00301   EnforcePrecondition(false, compare >= CF_EQUALS && compare <= CF_IS_FALSE);
00302 
00303   return AIObject::DoCommand(0, vehicle_id | (order_position << 16), MOF_COND_COMPARATOR | (compare << 4), CMD_MODIFY_ORDER);
00304 }
00305 
00306 /* static */ bool AIOrder::SetOrderCompareValue(VehicleID vehicle_id, OrderPosition order_position, int32 value)
00307 {
00308   EnforcePrecondition(false, IsValidVehicleOrder(vehicle_id, order_position));
00309   EnforcePrecondition(false, order_position != ORDER_CURRENT && IsConditionalOrder(vehicle_id, order_position));
00310   EnforcePrecondition(false, value >= 0 && value < 2048);
00311   if (GetOrderCondition(vehicle_id, order_position) == OC_MAX_SPEED) value = value * 10 / 16;
00312 
00313   return AIObject::DoCommand(0, vehicle_id | (order_position << 16), MOF_COND_VALUE | (value << 4), CMD_MODIFY_ORDER);
00314 }
00315 
00316 /* static */ bool AIOrder::AppendOrder(VehicleID vehicle_id, TileIndex destination, AIOrderFlags order_flags)
00317 {
00318   EnforcePrecondition(false, AIVehicle::IsValidVehicle(vehicle_id));
00319   EnforcePrecondition(false, AreOrderFlagsValid(destination, order_flags));
00320 
00321   return InsertOrder(vehicle_id, (AIOrder::OrderPosition)::Vehicle::Get(vehicle_id)->GetNumOrders(), destination, order_flags);
00322 }
00323 
00324 /* static */ bool AIOrder::AppendConditionalOrder(VehicleID vehicle_id, OrderPosition jump_to)
00325 {
00326   EnforcePrecondition(false, AIVehicle::IsValidVehicle(vehicle_id));
00327   EnforcePrecondition(false, IsValidVehicleOrder(vehicle_id, jump_to));
00328 
00329   return InsertConditionalOrder(vehicle_id, (AIOrder::OrderPosition)::Vehicle::Get(vehicle_id)->GetNumOrders(), jump_to);
00330 }
00331 
00332 /* static */ bool AIOrder::InsertOrder(VehicleID vehicle_id, OrderPosition order_position, TileIndex destination, AIOrder::AIOrderFlags order_flags)
00333 {
00334   /* IsValidVehicleOrder is not good enough because it does not allow appending. */
00335   if (order_position == ORDER_CURRENT) order_position = AIOrder::ResolveOrderPosition(vehicle_id, order_position);
00336 
00337   EnforcePrecondition(false, AIVehicle::IsValidVehicle(vehicle_id));
00338   EnforcePrecondition(false, order_position >= 0 && order_position <= ::Vehicle::Get(vehicle_id)->GetNumOrders());
00339   EnforcePrecondition(false, AreOrderFlagsValid(destination, order_flags));
00340 
00341   Order order;
00342   OrderType ot = (order_flags & AIOF_GOTO_NEAREST_DEPOT) ? OT_GOTO_DEPOT : ::GetOrderTypeByTile(destination);
00343   switch (ot) {
00344     case OT_GOTO_DEPOT: {
00345       OrderDepotTypeFlags odtf = (OrderDepotTypeFlags)(ODTFB_PART_OF_ORDERS | ((order_flags & AIOF_SERVICE_IF_NEEDED) ? ODTFB_SERVICE : 0));
00346       OrderDepotActionFlags odaf = (OrderDepotActionFlags)(ODATF_SERVICE_ONLY | ((order_flags & AIOF_STOP_IN_DEPOT) ? ODATFB_HALT : 0));
00347       if (order_flags & AIOF_GOTO_NEAREST_DEPOT) odaf |= ODATFB_NEAREST_DEPOT;
00348       OrderNonStopFlags onsf = (OrderNonStopFlags)((order_flags & AIOF_NON_STOP_INTERMEDIATE) ? ONSF_NO_STOP_AT_INTERMEDIATE_STATIONS : ONSF_STOP_EVERYWHERE);
00349       if (order_flags & AIOF_GOTO_NEAREST_DEPOT) {
00350         order.MakeGoToDepot(0, odtf, onsf, odaf);
00351       } else {
00352         /* Check explicitly if the order is to a station (for aircraft) or
00353          * to a depot (other vehicle types). */
00354         if (::Vehicle::Get(vehicle_id)->type == VEH_AIRCRAFT) {
00355           if (!::IsTileType(destination, MP_STATION)) return false;
00356           order.MakeGoToDepot(::GetStationIndex(destination), odtf, onsf, odaf);
00357         } else {
00358           if (::IsTileType(destination, MP_STATION)) return false;
00359           order.MakeGoToDepot(::GetDepotIndex(destination), odtf, onsf, odaf);
00360         }
00361       }
00362       break;
00363     }
00364 
00365     case OT_GOTO_STATION:
00366       order.MakeGoToStation(::GetStationIndex(destination));
00367       order.SetLoadType((OrderLoadFlags)GB(order_flags, 5, 3));
00368       order.SetUnloadType((OrderUnloadFlags)GB(order_flags, 2, 3));
00369       order.SetStopLocation(OSL_PLATFORM_FAR_END);
00370       break;
00371 
00372     case OT_GOTO_WAYPOINT:
00373       order.MakeGoToWaypoint(::GetStationIndex(destination));
00374       break;
00375 
00376     default:
00377       return false;
00378   }
00379 
00380   order.SetNonStopType((OrderNonStopFlags)GB(order_flags, 0, 2));
00381 
00382   return AIObject::DoCommand(0, vehicle_id | (order_position << 16), order.Pack(), CMD_INSERT_ORDER);
00383 }
00384 
00385 /* static */ bool AIOrder::InsertConditionalOrder(VehicleID vehicle_id, OrderPosition order_position, OrderPosition jump_to)
00386 {
00387   /* IsValidVehicleOrder is not good enough because it does not allow appending. */
00388   if (order_position == ORDER_CURRENT) order_position = AIOrder::ResolveOrderPosition(vehicle_id, order_position);
00389 
00390   EnforcePrecondition(false, AIVehicle::IsValidVehicle(vehicle_id));
00391   EnforcePrecondition(false, IsValidVehicleOrder(vehicle_id, jump_to));
00392 
00393   Order order;
00394   order.MakeConditional(jump_to);
00395 
00396   return AIObject::DoCommand(0, vehicle_id | (order_position << 16), order.Pack(), CMD_INSERT_ORDER);
00397 }
00398 
00399 /* static */ bool AIOrder::RemoveOrder(VehicleID vehicle_id, OrderPosition order_position)
00400 {
00401   order_position = AIOrder::ResolveOrderPosition(vehicle_id, order_position);
00402 
00403   EnforcePrecondition(false, IsValidVehicleOrder(vehicle_id, order_position));
00404 
00405   return AIObject::DoCommand(0, vehicle_id, order_position, CMD_DELETE_ORDER);
00406 }
00407 
00408 /* static */ bool AIOrder::SkipToOrder(VehicleID vehicle_id, OrderPosition next_order)
00409 {
00410   next_order = AIOrder::ResolveOrderPosition(vehicle_id, next_order);
00411 
00412   EnforcePrecondition(false, IsValidVehicleOrder(vehicle_id, next_order));
00413 
00414   return AIObject::DoCommand(0, vehicle_id, next_order, CMD_SKIP_TO_ORDER);
00415 }
00416 
00425 static void _DoCommandReturnSetOrderFlags(class AIInstance *instance)
00426 {
00427   AIObject::SetLastCommandRes(AIOrder::_SetOrderFlags());
00428   AIInstance::DoCommandReturn(instance);
00429 }
00430 
00431 /* static */ bool AIOrder::_SetOrderFlags()
00432 {
00433   /* Make sure we don't go into an infinite loop */
00434   int retry = AIObject::GetCallbackVariable(3) - 1;
00435   if (retry < 0) {
00436     DEBUG(ai, 0, "Possible infinite loop in SetOrderFlags() detected");
00437     return false;
00438   }
00439   AIObject::SetCallbackVariable(3, retry);
00440 
00441   VehicleID vehicle_id = (VehicleID)AIObject::GetCallbackVariable(0);
00442   OrderPosition order_position = (OrderPosition)AIObject::GetCallbackVariable(1);
00443   AIOrderFlags order_flags = (AIOrderFlags)AIObject::GetCallbackVariable(2);
00444 
00445   order_position = AIOrder::ResolveOrderPosition(vehicle_id, order_position);
00446 
00447   EnforcePrecondition(false, IsValidVehicleOrder(vehicle_id, order_position));
00448   EnforcePrecondition(false, AreOrderFlagsValid(GetOrderDestination(vehicle_id, order_position), order_flags));
00449 
00450   const Order *order = Vehicle::Get(vehicle_id)->GetOrder(order_position);
00451 
00452   AIOrderFlags current = GetOrderFlags(vehicle_id, order_position);
00453 
00454   if ((current & AIOF_NON_STOP_FLAGS) != (order_flags & AIOF_NON_STOP_FLAGS)) {
00455     return AIObject::DoCommand(0, vehicle_id | (order_position << 16), (order_flags & AIOF_NON_STOP_FLAGS) << 4 | MOF_NON_STOP, CMD_MODIFY_ORDER, NULL, &_DoCommandReturnSetOrderFlags);
00456   }
00457 
00458   switch (order->GetType()) {
00459     case OT_GOTO_DEPOT:
00460       if ((current & AIOF_DEPOT_FLAGS) != (order_flags & AIOF_DEPOT_FLAGS)) {
00461         uint data = DA_ALWAYS_GO;
00462         if (order_flags & AIOF_SERVICE_IF_NEEDED) data = DA_SERVICE;
00463         if (order_flags & AIOF_STOP_IN_DEPOT) data = DA_STOP;
00464         return AIObject::DoCommand(0, vehicle_id | (order_position << 16), (data << 4) | MOF_DEPOT_ACTION, CMD_MODIFY_ORDER, NULL, &_DoCommandReturnSetOrderFlags);
00465       }
00466       break;
00467 
00468     case OT_GOTO_STATION:
00469       if ((current & AIOF_UNLOAD_FLAGS) != (order_flags & AIOF_UNLOAD_FLAGS)) {
00470         return AIObject::DoCommand(0, vehicle_id | (order_position << 16), (order_flags & AIOF_UNLOAD_FLAGS) << 2 | MOF_UNLOAD, CMD_MODIFY_ORDER, NULL, &_DoCommandReturnSetOrderFlags);
00471       }
00472       if ((current & AIOF_LOAD_FLAGS) != (order_flags & AIOF_LOAD_FLAGS)) {
00473         return AIObject::DoCommand(0, vehicle_id | (order_position << 16), (order_flags & AIOF_LOAD_FLAGS) >> 1 | MOF_LOAD, CMD_MODIFY_ORDER, NULL, &_DoCommandReturnSetOrderFlags);
00474       }
00475       break;
00476 
00477     default: break;
00478   }
00479 
00480   assert(GetOrderFlags(vehicle_id, order_position) == order_flags);
00481 
00482   return true;
00483 }
00484 
00485 /* static */ bool AIOrder::SetOrderFlags(VehicleID vehicle_id, OrderPosition order_position, AIOrder::AIOrderFlags order_flags)
00486 {
00487   AIObject::SetCallbackVariable(0, vehicle_id);
00488   AIObject::SetCallbackVariable(1, order_position);
00489   AIObject::SetCallbackVariable(2, order_flags);
00490   /* In case another client(s) change orders at the same time we could
00491    * end in an infinite loop. This stops that from happening ever. */
00492   AIObject::SetCallbackVariable(3, 8);
00493   return AIOrder::_SetOrderFlags();
00494 }
00495 
00496 /* static */ bool AIOrder::MoveOrder(VehicleID vehicle_id, OrderPosition order_position_move, OrderPosition order_position_target)
00497 {
00498   order_position_move   = AIOrder::ResolveOrderPosition(vehicle_id, order_position_move);
00499   order_position_target = AIOrder::ResolveOrderPosition(vehicle_id, order_position_target);
00500 
00501   EnforcePrecondition(false, IsValidVehicleOrder(vehicle_id, order_position_move));
00502   EnforcePrecondition(false, IsValidVehicleOrder(vehicle_id, order_position_target));
00503 
00504   return AIObject::DoCommand(0, vehicle_id, order_position_move | (order_position_target << 16), CMD_MOVE_ORDER);
00505 }
00506 
00507 /* static */ bool AIOrder::CopyOrders(VehicleID vehicle_id, VehicleID main_vehicle_id)
00508 {
00509   EnforcePrecondition(false, AIVehicle::IsValidVehicle(vehicle_id));
00510   EnforcePrecondition(false, AIVehicle::IsValidVehicle(main_vehicle_id));
00511 
00512   return AIObject::DoCommand(0, vehicle_id | (main_vehicle_id << 16), CO_COPY, CMD_CLONE_ORDER);
00513 }
00514 
00515 /* static */ bool AIOrder::ShareOrders(VehicleID vehicle_id, VehicleID main_vehicle_id)
00516 {
00517   EnforcePrecondition(false, AIVehicle::IsValidVehicle(vehicle_id));
00518   EnforcePrecondition(false, AIVehicle::IsValidVehicle(main_vehicle_id));
00519 
00520   return AIObject::DoCommand(0, vehicle_id | (main_vehicle_id << 16), CO_SHARE, CMD_CLONE_ORDER);
00521 }
00522 
00523 /* static */ bool AIOrder::UnshareOrders(VehicleID vehicle_id)
00524 {
00525   EnforcePrecondition(false, AIVehicle::IsValidVehicle(vehicle_id));
00526 
00527   return AIObject::DoCommand(0, vehicle_id, CO_UNSHARE, CMD_CLONE_ORDER);
00528 }

Generated on Wed Jan 20 23:38:33 2010 for OpenTTD by  doxygen 1.5.6