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 #include "base_consist.h"
00026 
00028 enum VehStatus {
00029   VS_HIDDEN          = 0x01, 
00030   VS_STOPPED         = 0x02, 
00031   VS_UNCLICKABLE     = 0x04, 
00032   VS_DEFPAL          = 0x08, 
00033   VS_TRAIN_SLOWING   = 0x10, 
00034   VS_SHADOW          = 0x20, 
00035   VS_AIRCRAFT_BROKEN = 0x40, 
00036   VS_CRASHED         = 0x80, 
00037 };
00038 
00040 enum VehicleFlags {
00041   VF_LOADING_FINISHED,        
00042   VF_CARGO_UNLOADING,         
00043   VF_BUILT_AS_PROTOTYPE,      
00044   VF_TIMETABLE_STARTED,       
00045   VF_AUTOFILL_TIMETABLE,      
00046   VF_AUTOFILL_PRES_WAIT_TIME, 
00047   VF_STOP_LOADING,            
00048   VF_PATHFINDER_LOST,         
00049   VF_SERVINT_IS_CUSTOM,       
00050   VF_SERVINT_IS_PERCENT,      
00051 };
00052 
00054 enum NewGRFCacheValidValues {
00055   NCVV_POSITION_CONSIST_LENGTH   = 0, 
00056   NCVV_POSITION_SAME_ID_LENGTH   = 1, 
00057   NCVV_CONSIST_CARGO_INFORMATION = 2, 
00058   NCVV_COMPANY_INFORMATION       = 3, 
00059   NCVV_END,                           
00060 };
00061 
00063 struct NewGRFCache {
00064   /* Values calculated when they are requested for the first time after invalidating the NewGRF cache. */
00065   uint32 position_consist_length;   
00066   uint32 position_same_id_length;   
00067   uint32 consist_cargo_information; 
00068   uint32 company_information;       
00069   uint8  cache_valid;               
00070 };
00071 
00073 enum VisualEffect {
00074   VE_OFFSET_START        = 0, 
00075   VE_OFFSET_COUNT        = 4, 
00076   VE_OFFSET_CENTRE       = 8, 
00077 
00078   VE_TYPE_START          = 4, 
00079   VE_TYPE_COUNT          = 2, 
00080   VE_TYPE_DEFAULT        = 0, 
00081   VE_TYPE_STEAM          = 1, 
00082   VE_TYPE_DIESEL         = 2, 
00083   VE_TYPE_ELECTRIC       = 3, 
00084 
00085   VE_DISABLE_EFFECT      = 6, 
00086   VE_DISABLE_WAGON_POWER = 7, 
00087 
00088   VE_DEFAULT = 0xFF,          
00089 };
00090 
00096 enum GroundVehicleSubtypeFlags {
00097   GVSF_FRONT            = 0, 
00098   GVSF_ARTICULATED_PART = 1, 
00099   GVSF_WAGON            = 2, 
00100   GVSF_ENGINE           = 3, 
00101   GVSF_FREE_WAGON       = 4, 
00102   GVSF_MULTIHEADED      = 5, 
00103 };
00104 
00106 struct VehicleCache {
00107   uint16 cached_max_speed;        
00108   uint16 cached_cargo_age_period; 
00109 
00110   byte cached_vis_effect;  
00111 };
00112 
00114 typedef Pool<Vehicle, VehicleID, 512, 0xFF000> VehiclePool;
00115 extern VehiclePool _vehicle_pool;
00116 
00117 /* Some declarations of functions, so we can make them friendly */
00118 struct SaveLoad;
00119 struct GroundVehicleCache;
00120 extern const SaveLoad *GetVehicleDescription(VehicleType vt);
00121 struct LoadgameState;
00122 extern bool LoadOldVehicle(LoadgameState *ls, int num);
00123 extern void FixOldVehicles();
00124 
00125 struct GRFFile;
00126 
00128 struct Vehicle : VehiclePool::PoolItem<&_vehicle_pool>, BaseVehicle, BaseConsist {
00129 private:
00130   Vehicle *next;                      
00131   Vehicle *previous;                  
00132   Vehicle *first;                     
00133 
00134   Vehicle *next_shared;               
00135   Vehicle *previous_shared;           
00136 public:
00137   friend const SaveLoad *GetVehicleDescription(VehicleType vt); 
00138   friend void FixOldVehicles();
00139   friend void AfterLoadVehicles(bool part_of_load);             
00140   friend bool LoadOldVehicle(LoadgameState *ls, int num);       
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   Rect coord;                         
00158 
00159   Vehicle *hash_viewport_next;        
00160   Vehicle **hash_viewport_prev;       
00161 
00162   Vehicle *hash_tile_next;            
00163   Vehicle **hash_tile_prev;           
00164   Vehicle **hash_tile_current;        
00165 
00166   SpriteID colourmap;                 
00167 
00168   /* Related to age and service time */
00169   Year build_year;                    
00170   Date age;                           
00171   Date max_age;                       
00172   Date date_of_last_service;          
00173   uint16 reliability;                 
00174   uint16 reliability_spd_dec;         
00175   byte breakdown_ctr;                 
00176   byte breakdown_delay;               
00177   byte breakdowns_since_last_service; 
00178   byte breakdown_chance;              
00179 
00180   int32 x_pos;                        
00181   int32 y_pos;                        
00182   int32 z_pos;                        
00183   DirectionByte direction;            
00184 
00185   OwnerByte owner;                    
00186 
00191   byte spritenum;
00192   SpriteID cur_image;                 
00193   byte x_extent;                      
00194   byte y_extent;                      
00195   byte z_extent;                      
00196   int8 x_bb_offs;                     
00197   int8 y_bb_offs;                     
00198   int8 x_offs;                        
00199   int8 y_offs;                        
00200   EngineID engine_type;               
00201 
00202   TextEffectID fill_percent_te_id;    
00203   UnitID unitnumber;                  
00204 
00205   uint16 cur_speed;                   
00206   byte subspeed;                      
00207   byte acceleration;                  
00208   uint32 motion_counter;              
00209   byte progress;                      
00210 
00211   byte random_bits;                   
00212   byte waiting_triggers;              
00213 
00214   StationID last_station_visited;     
00215   StationID last_loading_station;     
00216 
00217   CargoID cargo_type;                 
00218   byte cargo_subtype;                 
00219   uint16 cargo_cap;                   
00220   uint16 refit_cap;                   
00221   VehicleCargoList cargo;             
00222   uint16 cargo_age_counter;           
00223 
00224   byte day_counter;                   
00225   byte tick_counter;                  
00226   byte running_ticks;                 
00227 
00228   byte vehstatus;                     
00229   Order current_order;                
00230 
00231   union {
00232     OrderList *list;            
00233     Order     *old;             
00234   } orders;                           
00235 
00236   uint16 load_unload_ticks;           
00237   GroupID group_id;                   
00238   byte subtype;                       
00239 
00240   NewGRFCache grf_cache;              
00241   VehicleCache vcache;                
00242 
00243   Vehicle(VehicleType type = VEH_INVALID);
00244 
00245   void PreDestructor();
00247   virtual ~Vehicle();
00248 
00249   void BeginLoading();
00250   void CancelReservation(StationID next, Station *st);
00251   void LeaveStation();
00252 
00253   GroundVehicleCache *GetGroundVehicleCache();
00254   const GroundVehicleCache *GetGroundVehicleCache() const;
00255 
00256   uint16 &GetGroundVehicleFlags();
00257   const uint16 &GetGroundVehicleFlags() const;
00258 
00259   void DeleteUnreachedImplicitOrders();
00260 
00261   void HandleLoading(bool mode = false);
00262 
00263   void GetConsistFreeCapacities(SmallMap<CargoID, uint> &capacities) const;
00264 
00265   uint GetConsistTotalCapacity() const;
00266 
00275   virtual void MarkDirty() {}
00276 
00282   virtual void UpdateDeltaXY(Direction direction) {}
00283 
00297   inline uint GetOldAdvanceSpeed(uint speed)
00298   {
00299     return (this->direction & 1) ? speed : speed * 3 / 4;
00300   }
00301 
00314   static inline uint GetAdvanceSpeed(uint speed)
00315   {
00316     return speed * 3 / 4;
00317   }
00318 
00326   inline uint GetAdvanceDistance()
00327   {
00328     return (this->direction & 1) ? 192 : 256;
00329   }
00330 
00335   virtual ExpensesType GetExpenseType(bool income) const { return EXPENSES_OTHER; }
00336 
00340   virtual void PlayLeaveStationSound() const {}
00341 
00345   virtual bool IsPrimaryVehicle() const { return false; }
00346 
00347   const Engine *GetEngine() const;
00348 
00354   virtual SpriteID GetImage(Direction direction, EngineImageType image_type) const { return 0; }
00355 
00356   const GRFFile *GetGRF() const;
00357   uint32 GetGRFID() const;
00358 
00363   inline void InvalidateNewGRFCache()
00364   {
00365     this->grf_cache.cache_valid = 0;
00366   }
00367 
00372   inline void InvalidateNewGRFCacheOfChain()
00373   {
00374     for (Vehicle *u = this; u != NULL; u = u->Next()) {
00375       u->InvalidateNewGRFCache();
00376     }
00377   }
00378 
00383   inline bool IsGroundVehicle() const
00384   {
00385     return this->type == VEH_TRAIN || this->type == VEH_ROAD;
00386   }
00387 
00392   virtual int GetDisplaySpeed() const { return 0; }
00393 
00398   virtual int GetDisplayMaxSpeed() const { return 0; }
00399 
00404   virtual int GetCurrentMaxSpeed() const { return 0; }
00405 
00410   virtual Money GetRunningCost() const { return 0; }
00411 
00416   virtual bool IsInDepot() const { return false; }
00417 
00422   virtual bool IsChainInDepot() const { return this->IsInDepot(); }
00423 
00428   bool IsStoppedInDepot() const
00429   {
00430     assert(this == this->First());
00431     /* Free wagons have no VS_STOPPED state */
00432     if (this->IsPrimaryVehicle() && !(this->vehstatus & VS_STOPPED)) return false;
00433     return this->IsChainInDepot();
00434   }
00435 
00440   virtual bool Tick() { return true; };
00441 
00445   virtual void OnNewDay() {};
00446 
00452   virtual uint Crash(bool flooded = false);
00453 
00466   virtual Trackdir GetVehicleTrackdir() const { return INVALID_TRACKDIR; }
00467 
00472   Money GetDisplayRunningCost() const { return (this->GetRunningCost() >> 8); }
00473 
00478   Money GetDisplayProfitThisYear() const { return (this->profit_this_year >> 8); }
00479 
00484   Money GetDisplayProfitLastYear() const { return (this->profit_last_year >> 8); }
00485 
00486   void SetNext(Vehicle *next);
00487 
00493   inline Vehicle *Next() const { return this->next; }
00494 
00500   inline Vehicle *Previous() const { return this->previous; }
00501 
00506   inline Vehicle *First() const { return this->first; }
00507 
00512   inline Vehicle *Last()
00513   {
00514     Vehicle *v = this;
00515     while (v->Next() != NULL) v = v->Next();
00516     return v;
00517   }
00518 
00523   inline const Vehicle *Last() const
00524   {
00525     const Vehicle *v = this;
00526     while (v->Next() != NULL) v = v->Next();
00527     return v;
00528   }
00529 
00535   inline Vehicle *Move(int n)
00536   {
00537     Vehicle *v = this;
00538     if (n < 0) {
00539       for (int i = 0; i != n && v != NULL; i--) v = v->Previous();
00540     } else {
00541       for (int i = 0; i != n && v != NULL; i++) v = v->Next();
00542     }
00543     return v;
00544   }
00545 
00551   inline const Vehicle *Move(int n) const
00552   {
00553     const Vehicle *v = this;
00554     if (n < 0) {
00555       for (int i = 0; i != n && v != NULL; i--) v = v->Previous();
00556     } else {
00557       for (int i = 0; i != n && v != NULL; i++) v = v->Next();
00558     }
00559     return v;
00560   }
00561 
00566   inline Order *GetFirstOrder() const { return (this->orders.list == NULL) ? NULL : this->orders.list->GetFirstOrder(); }
00567 
00568   void AddToShared(Vehicle *shared_chain);
00569   void RemoveFromShared();
00570 
00575   inline Vehicle *NextShared() const { return this->next_shared; }
00576 
00581   inline Vehicle *PreviousShared() const { return this->previous_shared; }
00582 
00587   inline Vehicle *FirstShared() const { return (this->orders.list == NULL) ? this->First() : this->orders.list->GetFirstSharedVehicle(); }
00588 
00593   inline bool IsOrderListShared() const { return this->orders.list != NULL && this->orders.list->IsShared(); }
00594 
00599   inline VehicleOrderID GetNumOrders() const { return (this->orders.list == NULL) ? 0 : this->orders.list->GetNumOrders(); }
00600 
00605   inline VehicleOrderID GetNumManualOrders() const { return (this->orders.list == NULL) ? 0 : this->orders.list->GetNumManualOrders(); }
00606 
00611   inline StationID GetNextStoppingStation() const
00612   {
00613     return (this->orders.list == NULL) ? INVALID_STATION : this->orders.list->GetNextStoppingStation(this);
00614   }
00615 
00616   void RefreshNextHopsStats();
00617 
00624   inline void CopyVehicleConfigAndStatistics(const Vehicle *src)
00625   {
00626     this->CopyConsistPropertiesFrom(src);
00627 
00628     this->unitnumber = src->unitnumber;
00629 
00630     this->current_order = src->current_order;
00631     this->dest_tile  = src->dest_tile;
00632 
00633     this->profit_this_year = src->profit_this_year;
00634     this->profit_last_year = src->profit_last_year;
00635   }
00636 
00637 
00638   bool HandleBreakdown();
00639 
00640   bool NeedsAutorenewing(const Company *c, bool use_renew_setting = true) const;
00641 
00642   bool NeedsServicing() const;
00643   bool NeedsAutomaticServicing() const;
00644 
00652   virtual TileIndex GetOrderStationLocation(StationID station) { return INVALID_TILE; }
00653 
00662   virtual bool FindClosestDepot(TileIndex *location, DestinationID *destination, bool *reverse) { return false; }
00663 
00664   CommandCost SendToDepot(DoCommandFlag flags, DepotCommand command);
00665 
00666   void UpdateVisualEffect(bool allow_power_change = true);
00667   void ShowVisualEffect() const;
00668 
00669   inline uint16 GetServiceInterval() const { return this->service_interval; }
00670 
00671   inline void SetServiceInterval(uint16 interval) { this->service_interval = interval; }
00672 
00673   inline bool ServiceIntervalIsCustom() const { return HasBit(this->vehicle_flags, VF_SERVINT_IS_CUSTOM); }
00674 
00675   inline bool ServiceIntervalIsPercent() const { return HasBit(this->vehicle_flags, VF_SERVINT_IS_PERCENT); }
00676 
00677   inline void SetServiceIntervalIsCustom(bool on) { SB(this->vehicle_flags, VF_SERVINT_IS_CUSTOM, 1, on); }
00678 
00679   inline void SetServiceIntervalIsPercent(bool on) { SB(this->vehicle_flags, VF_SERVINT_IS_PERCENT, 1, on); }
00680 
00681 private:
00686   void SkipToNextRealOrderIndex()
00687   {
00688     if (this->GetNumManualOrders() > 0) {
00689       /* Advance to next real order */
00690       do {
00691         this->cur_real_order_index++;
00692         if (this->cur_real_order_index >= this->GetNumOrders()) this->cur_real_order_index = 0;
00693       } while (this->GetOrder(this->cur_real_order_index)->IsType(OT_IMPLICIT));
00694     } else {
00695       this->cur_real_order_index = 0;
00696     }
00697   }
00698 
00699 public:
00705   void IncrementImplicitOrderIndex()
00706   {
00707     if (this->cur_implicit_order_index == this->cur_real_order_index) {
00708       /* Increment real order index as well */
00709       this->SkipToNextRealOrderIndex();
00710     }
00711 
00712     assert(this->cur_real_order_index == 0 || this->cur_real_order_index < this->GetNumOrders());
00713 
00714     /* Advance to next implicit order */
00715     do {
00716       this->cur_implicit_order_index++;
00717       if (this->cur_implicit_order_index >= this->GetNumOrders()) this->cur_implicit_order_index = 0;
00718     } while (this->cur_implicit_order_index != this->cur_real_order_index && !this->GetOrder(this->cur_implicit_order_index)->IsType(OT_IMPLICIT));
00719 
00720     InvalidateVehicleOrder(this, 0);
00721   }
00722 
00729   void IncrementRealOrderIndex()
00730   {
00731     if (this->cur_implicit_order_index == this->cur_real_order_index) {
00732       /* Increment both real and implicit order */
00733       this->IncrementImplicitOrderIndex();
00734     } else {
00735       /* Increment real order only */
00736       this->SkipToNextRealOrderIndex();
00737       InvalidateVehicleOrder(this, 0);
00738     }
00739   }
00740 
00744   void UpdateRealOrderIndex()
00745   {
00746     /* Make sure the index is valid */
00747     if (this->cur_real_order_index >= this->GetNumOrders()) this->cur_real_order_index = 0;
00748 
00749     if (this->GetNumManualOrders() > 0) {
00750       /* Advance to next real order */
00751       while (this->GetOrder(this->cur_real_order_index)->IsType(OT_IMPLICIT)) {
00752         this->cur_real_order_index++;
00753         if (this->cur_real_order_index >= this->GetNumOrders()) this->cur_real_order_index = 0;
00754       }
00755     } else {
00756       this->cur_real_order_index = 0;
00757     }
00758   }
00759 
00765   inline Order *GetOrder(int index) const
00766   {
00767     return (this->orders.list == NULL) ? NULL : this->orders.list->GetOrderAt(index);
00768   }
00769 
00774   inline Order *GetLastOrder() const
00775   {
00776     return (this->orders.list == NULL) ? NULL : this->orders.list->GetLastOrder();
00777   }
00778 
00779   bool IsEngineCountable() const;
00780   bool HasEngineType() const;
00781   bool HasDepotOrder() const;
00782   void HandlePathfindingResult(bool path_found);
00783 
00788   inline bool IsFrontEngine() const
00789   {
00790     return this->IsGroundVehicle() && HasBit(this->subtype, GVSF_FRONT);
00791   }
00792 
00797   inline bool IsArticulatedPart() const
00798   {
00799     return this->IsGroundVehicle() && HasBit(this->subtype, GVSF_ARTICULATED_PART);
00800   }
00801 
00806   inline bool HasArticulatedPart() const
00807   {
00808     return this->Next() != NULL && this->Next()->IsArticulatedPart();
00809   }
00810 
00816   inline Vehicle *GetNextArticulatedPart() const
00817   {
00818     assert(this->HasArticulatedPart());
00819     return this->Next();
00820   }
00821 
00826   inline Vehicle *GetFirstEnginePart()
00827   {
00828     Vehicle *v = this;
00829     while (v->IsArticulatedPart()) v = v->Previous();
00830     return v;
00831   }
00832 
00837   inline const Vehicle *GetFirstEnginePart() const
00838   {
00839     const Vehicle *v = this;
00840     while (v->IsArticulatedPart()) v = v->Previous();
00841     return v;
00842   }
00843 
00848   inline Vehicle *GetLastEnginePart()
00849   {
00850     Vehicle *v = this;
00851     while (v->HasArticulatedPart()) v = v->GetNextArticulatedPart();
00852     return v;
00853   }
00854 
00859   inline Vehicle *GetNextVehicle() const
00860   {
00861     const Vehicle *v = this;
00862     while (v->HasArticulatedPart()) v = v->GetNextArticulatedPart();
00863 
00864     /* v now contains the last articulated part in the engine */
00865     return v->Next();
00866   }
00867 
00872   inline Vehicle *GetPrevVehicle() const
00873   {
00874     Vehicle *v = this->Previous();
00875     while (v != NULL && v->IsArticulatedPart()) v = v->Previous();
00876 
00877     return v;
00878   }
00879 };
00880 
00886 #define FOR_ALL_VEHICLES_FROM(var, start) FOR_ALL_ITEMS_FROM(Vehicle, vehicle_index, var, start)
00887 
00892 #define FOR_ALL_VEHICLES(var) FOR_ALL_VEHICLES_FROM(var, 0)
00893 
00898 template <class T, VehicleType Type>
00899 struct SpecializedVehicle : public Vehicle {
00900   static const VehicleType EXPECTED_TYPE = Type; 
00901 
00902   typedef SpecializedVehicle<T, Type> SpecializedVehicleBase; 
00903 
00907   inline SpecializedVehicle<T, Type>() : Vehicle(Type) { }
00908 
00913   inline T *First() const { return (T *)this->Vehicle::First(); }
00914 
00919   inline T *Last() { return (T *)this->Vehicle::Last(); }
00920 
00925   inline const T *Last() const { return (const T *)this->Vehicle::Last(); }
00926 
00931   inline T *Next() const { return (T *)this->Vehicle::Next(); }
00932 
00937   inline T *Previous() const { return (T *)this->Vehicle::Previous(); }
00938 
00944   inline T *GetNextArticulatedPart() { return (T *)this->Vehicle::GetNextArticulatedPart(); }
00945 
00951   inline T *GetNextArticulatedPart() const { return (T *)this->Vehicle::GetNextArticulatedPart(); }
00952 
00957   inline T *GetFirstEnginePart() { return (T *)this->Vehicle::GetFirstEnginePart(); }
00958 
00963   inline const T *GetFirstEnginePart() const { return (const T *)this->Vehicle::GetFirstEnginePart(); }
00964 
00969   inline T *GetLastEnginePart() { return (T *)this->Vehicle::GetLastEnginePart(); }
00970 
00975   inline T *GetNextVehicle() const { return (T *)this->Vehicle::GetNextVehicle(); }
00976 
00981   inline T *GetPrevVehicle() const { return (T *)this->Vehicle::GetPrevVehicle(); }
00982 
00988   static inline bool IsValidID(size_t index)
00989   {
00990     return Vehicle::IsValidID(index) && Vehicle::Get(index)->type == Type;
00991   }
00992 
00997   static inline T *Get(size_t index)
00998   {
00999     return (T *)Vehicle::Get(index);
01000   }
01001 
01006   static inline T *GetIfValid(size_t index)
01007   {
01008     return IsValidID(index) ? Get(index) : NULL;
01009   }
01010 
01016   static inline T *From(Vehicle *v)
01017   {
01018     assert(v->type == Type);
01019     return (T *)v;
01020   }
01021 
01027   static inline const T *From(const Vehicle *v)
01028   {
01029     assert(v->type == Type);
01030     return (const T *)v;
01031   }
01032 
01038   inline void UpdateViewport(bool force_update, bool update_delta)
01039   {
01040     extern void VehicleUpdateViewport(Vehicle *v, bool dirty);
01041 
01042     /* Explicitly choose method to call to prevent vtable dereference -
01043      * it gives ~3% runtime improvements in games with many vehicles */
01044     if (update_delta) ((T *)this)->T::UpdateDeltaXY(this->direction);
01045     SpriteID old_image = this->cur_image;
01046     this->cur_image = ((T *)this)->T::GetImage(this->direction, EIT_ON_MAP);
01047     if (force_update || this->cur_image != old_image) VehicleUpdateViewport(this, true);
01048   }
01049 };
01050 
01056 #define FOR_ALL_VEHICLES_OF_TYPE(name, var) FOR_ALL_ITEMS_FROM(name, vehicle_index, var, 0) if (var->type == name::EXPECTED_TYPE)
01057 
01061 struct DisasterVehicle FINAL : public SpecializedVehicle<DisasterVehicle, VEH_DISASTER> {
01062   SpriteID image_override;            
01063   VehicleID big_ufo_destroyer_target; 
01064 
01066   DisasterVehicle() : SpecializedVehicleBase() {}
01068   virtual ~DisasterVehicle() {}
01069 
01070   void UpdateDeltaXY(Direction direction);
01071   bool Tick();
01072 };
01073 
01078 #define FOR_ALL_DISASTERVEHICLES(var) FOR_ALL_VEHICLES_OF_TYPE(DisasterVehicle, var)
01079 
01081 struct FreeUnitIDGenerator {
01082   bool *cache;  
01083   UnitID maxid; 
01084   UnitID curid; 
01085 
01086   FreeUnitIDGenerator(VehicleType type, CompanyID owner);
01087   UnitID NextID();
01088 
01090   ~FreeUnitIDGenerator() { free(this->cache); }
01091 };
01092 
01094 static const int32 INVALID_COORD = 0x7fffffff;
01095 
01096 #endif /* VEHICLE_BASE_H */