vehicle_base.h

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00001 /* $Id$ */
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 #ifndef VEHICLE_BASE_H
00013 #define VEHICLE_BASE_H
00014 
00015 #include "core/smallmap_type.hpp"
00016 #include "track_type.h"
00017 #include "command_type.h"
00018 #include "order_base.h"
00019 #include "cargopacket.h"
00020 #include "texteff.hpp"
00021 #include "engine_type.h"
00022 #include "order_func.h"
00023 #include "transport_type.h"
00024 #include "group_type.h"
00025 
00027 enum VehStatus {
00028   VS_HIDDEN          = 0x01, 
00029   VS_STOPPED         = 0x02, 
00030   VS_UNCLICKABLE     = 0x04, 
00031   VS_DEFPAL          = 0x08, 
00032   VS_TRAIN_SLOWING   = 0x10, 
00033   VS_SHADOW          = 0x20, 
00034   VS_AIRCRAFT_BROKEN = 0x40, 
00035   VS_CRASHED         = 0x80, 
00036 };
00037 
00039 enum VehicleFlags {
00040   VF_LOADING_FINISHED,        
00041   VF_CARGO_UNLOADING,         
00042   VF_BUILT_AS_PROTOTYPE,      
00043   VF_TIMETABLE_STARTED,       
00044   VF_AUTOFILL_TIMETABLE,      
00045   VF_AUTOFILL_PRES_WAIT_TIME, 
00046   VF_STOP_LOADING,            
00047   VF_PATHFINDER_LOST,         
00048 };
00049 
00051 enum NewGRFCacheValidValues {
00052   NCVV_POSITION_CONSIST_LENGTH   = 0, 
00053   NCVV_POSITION_SAME_ID_LENGTH   = 1, 
00054   NCVV_CONSIST_CARGO_INFORMATION = 2, 
00055   NCVV_COMPANY_INFORMATION       = 3, 
00056   NCVV_END,                           
00057 };
00058 
00060 struct NewGRFCache {
00061   /* Values calculated when they are requested for the first time after invalidating the NewGRF cache. */
00062   uint32 position_consist_length;   
00063   uint32 position_same_id_length;   
00064   uint32 consist_cargo_information; 
00065   uint32 company_information;       
00066   uint8  cache_valid;               
00067 };
00068 
00070 enum VisualEffect {
00071   VE_OFFSET_START        = 0, 
00072   VE_OFFSET_COUNT        = 4, 
00073   VE_OFFSET_CENTRE       = 8, 
00074 
00075   VE_TYPE_START          = 4, 
00076   VE_TYPE_COUNT          = 2, 
00077   VE_TYPE_DEFAULT        = 0, 
00078   VE_TYPE_STEAM          = 1, 
00079   VE_TYPE_DIESEL         = 2, 
00080   VE_TYPE_ELECTRIC       = 3, 
00081 
00082   VE_DISABLE_EFFECT      = 6, 
00083   VE_DISABLE_WAGON_POWER = 7, 
00084 
00085   VE_DEFAULT = 0xFF,          
00086 };
00087 
00093 enum GroundVehicleSubtypeFlags {
00094   GVSF_FRONT            = 0, 
00095   GVSF_ARTICULATED_PART = 1, 
00096   GVSF_WAGON            = 2, 
00097   GVSF_ENGINE           = 3, 
00098   GVSF_FREE_WAGON       = 4, 
00099   GVSF_MULTIHEADED      = 5, 
00100 };
00101 
00103 struct VehicleCache {
00104   uint16 cached_max_speed;        
00105   uint16 cached_cargo_age_period; 
00106 
00107   byte cached_vis_effect;  
00108 };
00109 
00111 typedef Pool<Vehicle, VehicleID, 512, 0xFF000> VehiclePool;
00112 extern VehiclePool _vehicle_pool;
00113 
00114 /* Some declarations of functions, so we can make them friendly */
00115 struct SaveLoad;
00116 struct GroundVehicleCache;
00117 extern const SaveLoad *GetVehicleDescription(VehicleType vt);
00118 struct LoadgameState;
00119 extern bool LoadOldVehicle(LoadgameState *ls, int num);
00120 extern void FixOldVehicles();
00121 
00122 struct GRFFile;
00123 
00125 struct Vehicle : VehiclePool::PoolItem<&_vehicle_pool>, BaseVehicle {
00126 private:
00127   Vehicle *next;                      
00128   Vehicle *previous;                  
00129   Vehicle *first;                     
00130 
00131   Vehicle *next_shared;               
00132   Vehicle *previous_shared;           
00133 
00134 public:
00135   friend const SaveLoad *GetVehicleDescription(VehicleType vt); 
00136   friend void FixOldVehicles();
00137   friend void AfterLoadVehicles(bool part_of_load);             
00138   friend bool LoadOldVehicle(LoadgameState *ls, int num);       
00139 
00140   char *name;                         
00141 
00142   TileIndex tile;                     
00143 
00149   TileIndex dest_tile;
00150 
00151   Money profit_this_year;             
00152   Money profit_last_year;             
00153   Money value;                        
00154 
00155   CargoPayment *cargo_payment;        
00156 
00157   /* Used for timetabling. */
00158   uint32 current_order_time;          
00159   int32 lateness_counter;             
00160   Date timetable_start;               
00161 
00162   Rect coord;                         
00163 
00164   Vehicle *next_hash;                 
00165   Vehicle **prev_hash;                
00166 
00167   Vehicle *next_new_hash;             
00168   Vehicle **prev_new_hash;            
00169   Vehicle **old_new_hash;             
00170 
00171   SpriteID colourmap;                 
00172 
00173   /* Related to age and service time */
00174   Year build_year;                    
00175   Date age;                           
00176   Date max_age;                       
00177   Date date_of_last_service;          
00178   Date service_interval;              
00179   uint16 reliability;                 
00180   uint16 reliability_spd_dec;         
00181   byte breakdown_ctr;                 
00182   byte breakdown_delay;               
00183   byte breakdowns_since_last_service; 
00184   byte breakdown_chance;              
00185 
00186   int32 x_pos;                        
00187   int32 y_pos;                        
00188   int32 z_pos;                        
00189   DirectionByte direction;            
00190 
00191   OwnerByte owner;                    
00192   byte spritenum;                     
00193 
00194 
00195   SpriteID cur_image;                 
00196   byte x_extent;                      
00197   byte y_extent;                      
00198   byte z_extent;                      
00199   int8 x_bb_offs;                     
00200   int8 y_bb_offs;                     
00201   int8 x_offs;                        
00202   int8 y_offs;                        
00203   EngineID engine_type;               
00204 
00205   TextEffectID fill_percent_te_id;    
00206   UnitID unitnumber;                  
00207 
00208   uint16 cur_speed;                   
00209   byte subspeed;                      
00210   byte acceleration;                  
00211   uint32 motion_counter;              
00212   byte progress;                      
00213 
00214   byte random_bits;                   
00215   byte waiting_triggers;              
00216 
00217   StationID last_station_visited;     
00218   StationID last_loading_station;     
00219 
00220   CargoID cargo_type;                 
00221   byte cargo_subtype;                 
00222   uint16 cargo_cap;                   
00223   uint16 refit_cap;                   
00224   VehicleCargoList cargo;             
00225   uint16 cargo_age_counter;           
00226 
00227   byte day_counter;                   
00228   byte tick_counter;                  
00229   byte running_ticks;                 
00230 
00231   byte vehstatus;                     
00232   Order current_order;                
00233   VehicleOrderID cur_real_order_index;
00234   VehicleOrderID cur_implicit_order_index;
00235 
00236   union {
00237     OrderList *list;            
00238     Order     *old;             
00239   } orders;                           
00240 
00241   byte vehicle_flags;                 
00242 
00243   uint16 load_unload_ticks;           
00244   GroupID group_id;                   
00245   byte subtype;                       
00246 
00247   NewGRFCache grf_cache;              
00248   VehicleCache vcache;                
00249 
00250   Vehicle(VehicleType type = VEH_INVALID);
00251 
00252   void PreDestructor();
00254   virtual ~Vehicle();
00255 
00256   void BeginLoading();
00257   void CancelReservation(StationID next, Station *st);
00258   void LeaveStation();
00259 
00260   GroundVehicleCache *GetGroundVehicleCache();
00261   const GroundVehicleCache *GetGroundVehicleCache() const;
00262 
00263   uint16 &GetGroundVehicleFlags();
00264   const uint16 &GetGroundVehicleFlags() const;
00265 
00266   void DeleteUnreachedImplicitOrders();
00267 
00268   void HandleLoading(bool mode = false);
00269 
00270   void GetConsistFreeCapacities(SmallMap<CargoID, uint> &capacities) const;
00271 
00272   uint GetConsistTotalCapacity() const;
00273 
00282   virtual void MarkDirty() {}
00283 
00289   virtual void UpdateDeltaXY(Direction direction) {}
00290 
00304   FORCEINLINE uint GetOldAdvanceSpeed(uint speed)
00305   {
00306     return (this->direction & 1) ? speed : speed * 3 / 4;
00307   }
00308 
00321   static FORCEINLINE uint GetAdvanceSpeed(uint speed)
00322   {
00323     return speed * 3 / 4;
00324   }
00325 
00333   FORCEINLINE uint GetAdvanceDistance()
00334   {
00335     return (this->direction & 1) ? 192 : 256;
00336   }
00337 
00342   virtual ExpensesType GetExpenseType(bool income) const { return EXPENSES_OTHER; }
00343 
00347   virtual void PlayLeaveStationSound() const {}
00348 
00352   virtual bool IsPrimaryVehicle() const { return false; }
00353 
00354   const Engine *GetEngine() const;
00355 
00361   virtual SpriteID GetImage(Direction direction, EngineImageType image_type) const { return 0; }
00362 
00363   const GRFFile *GetGRF() const;
00364   uint32 GetGRFID() const;
00365 
00370   FORCEINLINE void InvalidateNewGRFCache()
00371   {
00372     this->grf_cache.cache_valid = 0;
00373   }
00374 
00379   FORCEINLINE void InvalidateNewGRFCacheOfChain()
00380   {
00381     for (Vehicle *u = this; u != NULL; u = u->Next()) {
00382       u->InvalidateNewGRFCache();
00383     }
00384   }
00385 
00390   FORCEINLINE bool IsGroundVehicle() const
00391   {
00392     return this->type == VEH_TRAIN || this->type == VEH_ROAD;
00393   }
00394 
00399   virtual int GetDisplaySpeed() const { return 0; }
00400 
00405   virtual int GetDisplayMaxSpeed() const { return 0; }
00406 
00411   virtual Money GetRunningCost() const { return 0; }
00412 
00417   virtual bool IsInDepot() const { return false; }
00418 
00423   virtual bool IsStoppedInDepot() const { return this->IsInDepot() && (this->vehstatus & VS_STOPPED) != 0; }
00424 
00429   virtual bool Tick() { return true; };
00430 
00434   virtual void OnNewDay() {};
00435 
00441   virtual uint Crash(bool flooded = false);
00442 
00455   virtual Trackdir GetVehicleTrackdir() const { return INVALID_TRACKDIR; }
00456 
00461   Money GetDisplayRunningCost() const { return (this->GetRunningCost() >> 8); }
00462 
00467   Money GetDisplayProfitThisYear() const { return (this->profit_this_year >> 8); }
00468 
00473   Money GetDisplayProfitLastYear() const { return (this->profit_last_year >> 8); }
00474 
00475   void SetNext(Vehicle *next);
00476 
00482   inline Vehicle *Next() const { return this->next; }
00483 
00489   inline Vehicle *Previous() const { return this->previous; }
00490 
00495   inline Vehicle *First() const { return this->first; }
00496 
00501   inline Vehicle *Last()
00502   {
00503     Vehicle *v = this;
00504     while (v->Next() != NULL) v = v->Next();
00505     return v;
00506   }
00507 
00512   inline const Vehicle *Last() const
00513   {
00514     const Vehicle *v = this;
00515     while (v->Next() != NULL) v = v->Next();
00516     return v;
00517   }
00518 
00524   inline Vehicle *Move(int n)
00525   {
00526     Vehicle *v = this;
00527     if (n < 0) {
00528       for (int i = 0; i != n && v != NULL; i--) v = v->Previous();
00529     } else {
00530       for (int i = 0; i != n && v != NULL; i++) v = v->Next();
00531     }
00532     return v;
00533   }
00534 
00539   inline Order *GetFirstOrder() const { return (this->orders.list == NULL) ? NULL : this->orders.list->GetFirstOrder(); }
00540 
00541   void AddToShared(Vehicle *shared_chain);
00542   void RemoveFromShared();
00543 
00548   inline Vehicle *NextShared() const { return this->next_shared; }
00549 
00554   inline Vehicle *PreviousShared() const { return this->previous_shared; }
00555 
00560   inline Vehicle *FirstShared() const { return (this->orders.list == NULL) ? this->First() : this->orders.list->GetFirstSharedVehicle(); }
00561 
00566   inline bool IsOrderListShared() const { return this->orders.list != NULL && this->orders.list->IsShared(); }
00567 
00572   inline VehicleOrderID GetNumOrders() const { return (this->orders.list == NULL) ? 0 : this->orders.list->GetNumOrders(); }
00573 
00578   inline VehicleOrderID GetNumManualOrders() const { return (this->orders.list == NULL) ? 0 : this->orders.list->GetNumManualOrders(); }
00579 
00584   inline StationID GetNextStoppingStation() const
00585   {
00586     return (this->orders.list == NULL) ? INVALID_STATION : this->orders.list->GetNextStoppingStation(this);
00587   }
00588 
00589   void RefreshNextHopsStats();
00590   
00597   inline void CopyVehicleConfigAndStatistics(const Vehicle *src)
00598   {
00599     this->unitnumber = src->unitnumber;
00600 
00601     this->cur_real_order_index = src->cur_real_order_index;
00602     this->cur_implicit_order_index = src->cur_implicit_order_index;
00603     this->current_order = src->current_order;
00604     this->dest_tile  = src->dest_tile;
00605 
00606     this->profit_this_year = src->profit_this_year;
00607     this->profit_last_year = src->profit_last_year;
00608 
00609     this->current_order_time = src->current_order_time;
00610     this->lateness_counter = src->lateness_counter;
00611     this->timetable_start = src->timetable_start;
00612 
00613     if (HasBit(src->vehicle_flags, VF_TIMETABLE_STARTED)) SetBit(this->vehicle_flags, VF_TIMETABLE_STARTED);
00614     if (HasBit(src->vehicle_flags, VF_AUTOFILL_TIMETABLE)) SetBit(this->vehicle_flags, VF_AUTOFILL_TIMETABLE);
00615     if (HasBit(src->vehicle_flags, VF_AUTOFILL_PRES_WAIT_TIME)) SetBit(this->vehicle_flags, VF_AUTOFILL_PRES_WAIT_TIME);
00616 
00617     this->service_interval = src->service_interval;
00618   }
00619 
00620 
00621   bool HandleBreakdown();
00622 
00623   bool NeedsAutorenewing(const Company *c) const;
00624 
00625   bool NeedsServicing() const;
00626   bool NeedsAutomaticServicing() const;
00627 
00635   virtual TileIndex GetOrderStationLocation(StationID station) { return INVALID_TILE; }
00636 
00645   virtual bool FindClosestDepot(TileIndex *location, DestinationID *destination, bool *reverse) { return false; }
00646 
00647   CommandCost SendToDepot(DoCommandFlag flags, DepotCommand command);
00648 
00649   void UpdateVisualEffect(bool allow_power_change = true);
00650   void ShowVisualEffect() const;
00651 
00652 private:
00657   void SkipToNextRealOrderIndex()
00658   {
00659     if (this->GetNumManualOrders() > 0) {
00660       /* Advance to next real order */
00661       do {
00662         this->cur_real_order_index++;
00663         if (this->cur_real_order_index >= this->GetNumOrders()) this->cur_real_order_index = 0;
00664       } while (this->GetOrder(this->cur_real_order_index)->IsType(OT_IMPLICIT));
00665     } else {
00666       this->cur_real_order_index = 0;
00667     }
00668   }
00669 
00670 public:
00676   void IncrementImplicitOrderIndex()
00677   {
00678     if (this->cur_implicit_order_index == this->cur_real_order_index) {
00679       /* Increment real order index as well */
00680       this->SkipToNextRealOrderIndex();
00681     }
00682 
00683     assert(this->cur_real_order_index == 0 || this->cur_real_order_index < this->GetNumOrders());
00684 
00685     /* Advance to next implicit order */
00686     do {
00687       this->cur_implicit_order_index++;
00688       if (this->cur_implicit_order_index >= this->GetNumOrders()) this->cur_implicit_order_index = 0;
00689     } while (this->cur_implicit_order_index != this->cur_real_order_index && !this->GetOrder(this->cur_implicit_order_index)->IsType(OT_IMPLICIT));
00690 
00691     InvalidateVehicleOrder(this, 0);
00692   }
00693 
00700   void IncrementRealOrderIndex()
00701   {
00702     if (this->cur_implicit_order_index == this->cur_real_order_index) {
00703       /* Increment both real and implicit order */
00704       this->IncrementImplicitOrderIndex();
00705     } else {
00706       /* Increment real order only */
00707       this->SkipToNextRealOrderIndex();
00708       InvalidateVehicleOrder(this, 0);
00709     }
00710   }
00711 
00715   void UpdateRealOrderIndex()
00716   {
00717     /* Make sure the index is valid */
00718     if (this->cur_real_order_index >= this->GetNumOrders()) this->cur_real_order_index = 0;
00719 
00720     if (this->GetNumManualOrders() > 0) {
00721       /* Advance to next real order */
00722       while (this->GetOrder(this->cur_real_order_index)->IsType(OT_IMPLICIT)) {
00723         this->cur_real_order_index++;
00724         if (this->cur_real_order_index >= this->GetNumOrders()) this->cur_real_order_index = 0;
00725       }
00726     } else {
00727       this->cur_real_order_index = 0;
00728     }
00729   }
00730 
00736   inline Order *GetOrder(int index) const
00737   {
00738     return (this->orders.list == NULL) ? NULL : this->orders.list->GetOrderAt(index);
00739   }
00740 
00745   inline Order *GetLastOrder() const
00746   {
00747     return (this->orders.list == NULL) ? NULL : this->orders.list->GetLastOrder();
00748   }
00749 
00750   bool IsEngineCountable() const;
00751   bool HasEngineType() const;
00752   bool HasDepotOrder() const;
00753   void HandlePathfindingResult(bool path_found);
00754 
00759   FORCEINLINE bool IsFrontEngine() const
00760   {
00761     return this->IsGroundVehicle() && HasBit(this->subtype, GVSF_FRONT);
00762   }
00763 
00768   FORCEINLINE bool IsArticulatedPart() const
00769   {
00770     return this->IsGroundVehicle() && HasBit(this->subtype, GVSF_ARTICULATED_PART);
00771   }
00772 
00777   FORCEINLINE bool HasArticulatedPart() const
00778   {
00779     return this->Next() != NULL && this->Next()->IsArticulatedPart();
00780   }
00781 
00787   FORCEINLINE Vehicle *GetNextArticulatedPart() const
00788   {
00789     assert(this->HasArticulatedPart());
00790     return this->Next();
00791   }
00792 
00797   FORCEINLINE Vehicle *GetFirstEnginePart()
00798   {
00799     Vehicle *v = this;
00800     while (v->IsArticulatedPart()) v = v->Previous();
00801     return v;
00802   }
00803 
00808   FORCEINLINE const Vehicle *GetFirstEnginePart() const
00809   {
00810     const Vehicle *v = this;
00811     while (v->IsArticulatedPart()) v = v->Previous();
00812     return v;
00813   }
00814 
00819   FORCEINLINE Vehicle *GetLastEnginePart()
00820   {
00821     Vehicle *v = this;
00822     while (v->HasArticulatedPart()) v = v->GetNextArticulatedPart();
00823     return v;
00824   }
00825 
00830   FORCEINLINE Vehicle *GetNextVehicle() const
00831   {
00832     const Vehicle *v = this;
00833     while (v->HasArticulatedPart()) v = v->GetNextArticulatedPart();
00834 
00835     /* v now contains the last articulated part in the engine */
00836     return v->Next();
00837   }
00838 
00843   FORCEINLINE Vehicle *GetPrevVehicle() const
00844   {
00845     Vehicle *v = this->Previous();
00846     while (v != NULL && v->IsArticulatedPart()) v = v->Previous();
00847 
00848     return v;
00849   }
00850 };
00851 
00857 #define FOR_ALL_VEHICLES_FROM(var, start) FOR_ALL_ITEMS_FROM(Vehicle, vehicle_index, var, start)
00858 
00863 #define FOR_ALL_VEHICLES(var) FOR_ALL_VEHICLES_FROM(var, 0)
00864 
00869 template <class T, VehicleType Type>
00870 struct SpecializedVehicle : public Vehicle {
00871   static const VehicleType EXPECTED_TYPE = Type; 
00872 
00873   typedef SpecializedVehicle<T, Type> SpecializedVehicleBase; 
00874 
00878   FORCEINLINE SpecializedVehicle<T, Type>() : Vehicle(Type) { }
00879 
00884   FORCEINLINE T *First() const { return (T *)this->Vehicle::First(); }
00885 
00890   FORCEINLINE T *Last() { return (T *)this->Vehicle::Last(); }
00891 
00896   FORCEINLINE const T *Last() const { return (const T *)this->Vehicle::Last(); }
00897 
00902   FORCEINLINE T *Next() const { return (T *)this->Vehicle::Next(); }
00903 
00908   FORCEINLINE T *Previous() const { return (T *)this->Vehicle::Previous(); }
00909 
00915   FORCEINLINE T *GetNextArticulatedPart() { return (T *)this->Vehicle::GetNextArticulatedPart(); }
00916 
00922   FORCEINLINE T *GetNextArticulatedPart() const { return (T *)this->Vehicle::GetNextArticulatedPart(); }
00923 
00928   FORCEINLINE T *GetFirstEnginePart() { return (T *)this->Vehicle::GetFirstEnginePart(); }
00929 
00934   FORCEINLINE const T *GetFirstEnginePart() const { return (const T *)this->Vehicle::GetFirstEnginePart(); }
00935 
00940   FORCEINLINE T *GetLastEnginePart() { return (T *)this->Vehicle::GetLastEnginePart(); }
00941 
00946   FORCEINLINE T *GetNextVehicle() const { return (T *)this->Vehicle::GetNextVehicle(); }
00947 
00952   FORCEINLINE T *GetPrevVehicle() const { return (T *)this->Vehicle::GetPrevVehicle(); }
00953 
00959   static FORCEINLINE bool IsValidID(size_t index)
00960   {
00961     return Vehicle::IsValidID(index) && Vehicle::Get(index)->type == Type;
00962   }
00963 
00968   static FORCEINLINE T *Get(size_t index)
00969   {
00970     return (T *)Vehicle::Get(index);
00971   }
00972 
00977   static FORCEINLINE T *GetIfValid(size_t index)
00978   {
00979     return IsValidID(index) ? Get(index) : NULL;
00980   }
00981 
00987   static FORCEINLINE T *From(Vehicle *v)
00988   {
00989     assert(v->type == Type);
00990     return (T *)v;
00991   }
00992 
00998   static FORCEINLINE const T *From(const Vehicle *v)
00999   {
01000     assert(v->type == Type);
01001     return (const T *)v;
01002   }
01003 
01009   FORCEINLINE void UpdateViewport(bool moved, bool turned)
01010   {
01011     extern void VehicleMove(Vehicle *v, bool update_viewport);
01012 
01013     /* Explicitly choose method to call to prevent vtable dereference -
01014      * it gives ~3% runtime improvements in games with many vehicles */
01015     if (turned) ((T *)this)->T::UpdateDeltaXY(this->direction);
01016     SpriteID old_image = this->cur_image;
01017     this->cur_image = ((T *)this)->T::GetImage(this->direction, EIT_ON_MAP);
01018     if (moved || this->cur_image != old_image) VehicleMove(this, true);
01019   }
01020 };
01021 
01027 #define FOR_ALL_VEHICLES_OF_TYPE(name, var) FOR_ALL_ITEMS_FROM(name, vehicle_index, var, 0) if (var->type == name::EXPECTED_TYPE)
01028 
01032 struct DisasterVehicle : public SpecializedVehicle<DisasterVehicle, VEH_DISASTER> {
01033   SpriteID image_override;            
01034   VehicleID big_ufo_destroyer_target; 
01035 
01037   DisasterVehicle() : SpecializedVehicleBase() {}
01039   virtual ~DisasterVehicle() {}
01040 
01041   void UpdateDeltaXY(Direction direction);
01042   bool Tick();
01043 };
01044 
01049 #define FOR_ALL_DISASTERVEHICLES(var) FOR_ALL_VEHICLES_OF_TYPE(DisasterVehicle, var)
01050 
01052 struct FreeUnitIDGenerator {
01053   bool *cache;  
01054   UnitID maxid; 
01055   UnitID curid; 
01056 
01057   FreeUnitIDGenerator(VehicleType type, CompanyID owner);
01058   UnitID NextID();
01059 
01061   ~FreeUnitIDGenerator() { free(this->cache); }
01062 };
01063 
01065 static const int32 INVALID_COORD = 0x7fffffff;
01066 
01067 #endif /* VEHICLE_BASE_H */