vehicle_base.h

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00001 /* $Id: vehicle_base.h 24424 2012-07-20 19:45:31Z rubidium $ */
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 "track_type.h"
00016 #include "command_type.h"
00017 #include "order_base.h"
00018 #include "cargopacket.h"
00019 #include "texteff.hpp"
00020 #include "engine_type.h"
00021 #include "order_func.h"
00022 #include "transport_type.h"
00023 #include "group_type.h"
00024 
00026 enum VehStatus {
00027   VS_HIDDEN          = 0x01, 
00028   VS_STOPPED         = 0x02, 
00029   VS_UNCLICKABLE     = 0x04, 
00030   VS_DEFPAL          = 0x08, 
00031   VS_TRAIN_SLOWING   = 0x10, 
00032   VS_SHADOW          = 0x20, 
00033   VS_AIRCRAFT_BROKEN = 0x40, 
00034   VS_CRASHED         = 0x80, 
00035 };
00036 
00038 enum VehicleFlags {
00039   VF_LOADING_FINISHED,        
00040   VF_CARGO_UNLOADING,         
00041   VF_BUILT_AS_PROTOTYPE,      
00042   VF_TIMETABLE_STARTED,       
00043   VF_AUTOFILL_TIMETABLE,      
00044   VF_AUTOFILL_PRES_WAIT_TIME, 
00045   VF_STOP_LOADING,            
00046   VF_PATHFINDER_LOST,         
00047 };
00048 
00050 enum NewGRFCacheValidValues {
00051   NCVV_POSITION_CONSIST_LENGTH   = 0, 
00052   NCVV_POSITION_SAME_ID_LENGTH   = 1, 
00053   NCVV_CONSIST_CARGO_INFORMATION = 2, 
00054   NCVV_COMPANY_INFORMATION       = 3, 
00055   NCVV_END,                           
00056 };
00057 
00059 struct NewGRFCache {
00060   /* Values calculated when they are requested for the first time after invalidating the NewGRF cache. */
00061   uint32 position_consist_length;   
00062   uint32 position_same_id_length;   
00063   uint32 consist_cargo_information; 
00064   uint32 company_information;       
00065   uint8  cache_valid;               
00066 };
00067 
00069 enum VisualEffect {
00070   VE_OFFSET_START        = 0, 
00071   VE_OFFSET_COUNT        = 4, 
00072   VE_OFFSET_CENTRE       = 8, 
00073 
00074   VE_TYPE_START          = 4, 
00075   VE_TYPE_COUNT          = 2, 
00076   VE_TYPE_DEFAULT        = 0, 
00077   VE_TYPE_STEAM          = 1, 
00078   VE_TYPE_DIESEL         = 2, 
00079   VE_TYPE_ELECTRIC       = 3, 
00080 
00081   VE_DISABLE_EFFECT      = 6, 
00082   VE_DISABLE_WAGON_POWER = 7, 
00083 
00084   VE_DEFAULT = 0xFF,          
00085 };
00086 
00092 enum GroundVehicleSubtypeFlags {
00093   GVSF_FRONT            = 0, 
00094   GVSF_ARTICULATED_PART = 1, 
00095   GVSF_WAGON            = 2, 
00096   GVSF_ENGINE           = 3, 
00097   GVSF_FREE_WAGON       = 4, 
00098   GVSF_MULTIHEADED      = 5, 
00099 };
00100 
00102 struct VehicleCache {
00103   uint16 cached_max_speed;        
00104   uint16 cached_cargo_age_period; 
00105 
00106   byte cached_vis_effect;  
00107 };
00108 
00110 typedef Pool<Vehicle, VehicleID, 512, 0xFF000> VehiclePool;
00111 extern VehiclePool _vehicle_pool;
00112 
00113 /* Some declarations of functions, so we can make them friendly */
00114 struct SaveLoad;
00115 struct GroundVehicleCache;
00116 extern const SaveLoad *GetVehicleDescription(VehicleType vt);
00117 struct LoadgameState;
00118 extern bool LoadOldVehicle(LoadgameState *ls, int num);
00119 extern void FixOldVehicles();
00120 
00121 struct GRFFile;
00122 
00124 struct Vehicle : VehiclePool::PoolItem<&_vehicle_pool>, BaseVehicle {
00125 private:
00126   Vehicle *next;                      
00127   Vehicle *previous;                  
00128   Vehicle *first;                     
00129 
00130   Vehicle *next_shared;               
00131   Vehicle *previous_shared;           
00132 public:
00133   friend const SaveLoad *GetVehicleDescription(VehicleType vt); 
00134   friend void FixOldVehicles();
00135   friend void AfterLoadVehicles(bool part_of_load);             
00136   friend bool LoadOldVehicle(LoadgameState *ls, int num);       
00137 
00138   char *name;                         
00139 
00140   TileIndex tile;                     
00141 
00147   TileIndex dest_tile;
00148 
00149   Money profit_this_year;             
00150   Money profit_last_year;             
00151   Money value;                        
00152 
00153   CargoPayment *cargo_payment;        
00154 
00155   /* Used for timetabling. */
00156   uint32 current_order_time;          
00157   int32 lateness_counter;             
00158   Date timetable_start;               
00159 
00160   Rect coord;                         
00161 
00162   Vehicle *hash_viewport_next;        
00163   Vehicle **hash_viewport_prev;       
00164 
00165   Vehicle *hash_tile_next;            
00166   Vehicle **hash_tile_prev;           
00167   Vehicle **hash_tile_current;        
00168 
00169   SpriteID colourmap;                 
00170 
00171   /* Related to age and service time */
00172   Year build_year;                    
00173   Date age;                           
00174   Date max_age;                       
00175   Date date_of_last_service;          
00176   Date service_interval;              
00177   uint16 reliability;                 
00178   uint16 reliability_spd_dec;         
00179   byte breakdown_ctr;                 
00180   byte breakdown_delay;               
00181   byte breakdowns_since_last_service; 
00182   byte breakdown_chance;              
00183 
00184   int32 x_pos;                        
00185   int32 y_pos;                        
00186   int32 z_pos;                        
00187   DirectionByte direction;            
00188 
00189   OwnerByte owner;                    
00190 
00195   byte spritenum;
00196   SpriteID cur_image;                 
00197   byte x_extent;                      
00198   byte y_extent;                      
00199   byte z_extent;                      
00200   int8 x_bb_offs;                     
00201   int8 y_bb_offs;                     
00202   int8 x_offs;                        
00203   int8 y_offs;                        
00204   EngineID engine_type;               
00205 
00206   TextEffectID fill_percent_te_id;    
00207   UnitID unitnumber;                  
00208 
00209   uint16 cur_speed;                   
00210   byte subspeed;                      
00211   byte acceleration;                  
00212   uint32 motion_counter;              
00213   byte progress;                      
00214 
00215   byte random_bits;                   
00216   byte waiting_triggers;              
00217 
00218   StationID last_station_visited;     
00219 
00220   CargoID cargo_type;                 
00221   byte cargo_subtype;                 
00222   uint16 cargo_cap;                   
00223   VehicleCargoList cargo;             
00224   uint16 cargo_age_counter;           
00225 
00226   byte day_counter;                   
00227   byte tick_counter;                  
00228   byte running_ticks;                 
00229 
00230   byte vehstatus;                     
00231   Order current_order;                
00232   VehicleOrderID cur_real_order_index;
00233   VehicleOrderID cur_implicit_order_index;
00234 
00235   union {
00236     OrderList *list;            
00237     Order     *old;             
00238   } orders;                           
00239 
00240   byte vehicle_flags;                 
00241 
00242   uint16 load_unload_ticks;           
00243   GroupID group_id;                   
00244   byte subtype;                       
00245 
00246   NewGRFCache grf_cache;              
00247   VehicleCache vcache;                
00248 
00249   Vehicle(VehicleType type = VEH_INVALID);
00250 
00251   void PreDestructor();
00253   virtual ~Vehicle();
00254 
00255   void BeginLoading();
00256   void LeaveStation();
00257 
00258   GroundVehicleCache *GetGroundVehicleCache();
00259   const GroundVehicleCache *GetGroundVehicleCache() const;
00260 
00261   uint16 &GetGroundVehicleFlags();
00262   const uint16 &GetGroundVehicleFlags() const;
00263 
00264   void DeleteUnreachedImplicitOrders();
00265 
00266   void HandleLoading(bool mode = false);
00267 
00276   virtual void MarkDirty() {}
00277 
00283   virtual void UpdateDeltaXY(Direction direction) {}
00284 
00298   inline uint GetOldAdvanceSpeed(uint speed)
00299   {
00300     return (this->direction & 1) ? speed : speed * 3 / 4;
00301   }
00302 
00315   static inline uint GetAdvanceSpeed(uint speed)
00316   {
00317     return speed * 3 / 4;
00318   }
00319 
00327   inline uint GetAdvanceDistance()
00328   {
00329     return (this->direction & 1) ? 192 : 256;
00330   }
00331 
00336   virtual ExpensesType GetExpenseType(bool income) const { return EXPENSES_OTHER; }
00337 
00341   virtual void PlayLeaveStationSound() const {}
00342 
00346   virtual bool IsPrimaryVehicle() const { return false; }
00347 
00348   const Engine *GetEngine() const;
00349 
00355   virtual SpriteID GetImage(Direction direction, EngineImageType image_type) const { return 0; }
00356 
00357   const GRFFile *GetGRF() const;
00358   uint32 GetGRFID() const;
00359 
00364   inline void InvalidateNewGRFCache()
00365   {
00366     this->grf_cache.cache_valid = 0;
00367   }
00368 
00373   inline void InvalidateNewGRFCacheOfChain()
00374   {
00375     for (Vehicle *u = this; u != NULL; u = u->Next()) {
00376       u->InvalidateNewGRFCache();
00377     }
00378   }
00379 
00384   inline bool IsGroundVehicle() const
00385   {
00386     return this->type == VEH_TRAIN || this->type == VEH_ROAD;
00387   }
00388 
00393   virtual int GetDisplaySpeed() const { return 0; }
00394 
00399   virtual int GetDisplayMaxSpeed() const { return 0; }
00400 
00405   virtual Money GetRunningCost() const { return 0; }
00406 
00411   virtual bool IsInDepot() const { return false; }
00412 
00417   virtual bool IsChainInDepot() const { return this->IsInDepot(); }
00418 
00423   bool IsStoppedInDepot() const
00424   {
00425     assert(this == this->First());
00426     /* Free wagons have no VS_STOPPED state */
00427     if (this->IsPrimaryVehicle() && !(this->vehstatus & VS_STOPPED)) return false;
00428     return this->IsChainInDepot();
00429   }
00430 
00435   virtual bool Tick() { return true; };
00436 
00440   virtual void OnNewDay() {};
00441 
00447   virtual uint Crash(bool flooded = false);
00448 
00461   virtual Trackdir GetVehicleTrackdir() const { return INVALID_TRACKDIR; }
00462 
00467   Money GetDisplayRunningCost() const { return (this->GetRunningCost() >> 8); }
00468 
00473   Money GetDisplayProfitThisYear() const { return (this->profit_this_year >> 8); }
00474 
00479   Money GetDisplayProfitLastYear() const { return (this->profit_last_year >> 8); }
00480 
00481   void SetNext(Vehicle *next);
00482 
00488   inline Vehicle *Next() const { return this->next; }
00489 
00495   inline Vehicle *Previous() const { return this->previous; }
00496 
00501   inline Vehicle *First() const { return this->first; }
00502 
00507   inline Vehicle *Last()
00508   {
00509     Vehicle *v = this;
00510     while (v->Next() != NULL) v = v->Next();
00511     return v;
00512   }
00513 
00518   inline const Vehicle *Last() const
00519   {
00520     const Vehicle *v = this;
00521     while (v->Next() != NULL) v = v->Next();
00522     return v;
00523   }
00524 
00530   inline Vehicle *Move(int n)
00531   {
00532     Vehicle *v = this;
00533     if (n < 0) {
00534       for (int i = 0; i != n && v != NULL; i--) v = v->Previous();
00535     } else {
00536       for (int i = 0; i != n && v != NULL; i++) v = v->Next();
00537     }
00538     return v;
00539   }
00540 
00545   inline Order *GetFirstOrder() const { return (this->orders.list == NULL) ? NULL : this->orders.list->GetFirstOrder(); }
00546 
00547   void AddToShared(Vehicle *shared_chain);
00548   void RemoveFromShared();
00549 
00554   inline Vehicle *NextShared() const { return this->next_shared; }
00555 
00560   inline Vehicle *PreviousShared() const { return this->previous_shared; }
00561 
00566   inline Vehicle *FirstShared() const { return (this->orders.list == NULL) ? this->First() : this->orders.list->GetFirstSharedVehicle(); }
00567 
00572   inline bool IsOrderListShared() const { return this->orders.list != NULL && this->orders.list->IsShared(); }
00573 
00578   inline VehicleOrderID GetNumOrders() const { return (this->orders.list == NULL) ? 0 : this->orders.list->GetNumOrders(); }
00579 
00584   inline VehicleOrderID GetNumManualOrders() const { return (this->orders.list == NULL) ? 0 : this->orders.list->GetNumManualOrders(); }
00585 
00592   inline void CopyVehicleConfigAndStatistics(const Vehicle *src)
00593   {
00594     this->unitnumber = src->unitnumber;
00595 
00596     this->cur_real_order_index = src->cur_real_order_index;
00597     this->cur_implicit_order_index = src->cur_implicit_order_index;
00598     this->current_order = src->current_order;
00599     this->dest_tile  = src->dest_tile;
00600 
00601     this->profit_this_year = src->profit_this_year;
00602     this->profit_last_year = src->profit_last_year;
00603 
00604     this->current_order_time = src->current_order_time;
00605     this->lateness_counter = src->lateness_counter;
00606     this->timetable_start = src->timetable_start;
00607 
00608     if (HasBit(src->vehicle_flags, VF_TIMETABLE_STARTED)) SetBit(this->vehicle_flags, VF_TIMETABLE_STARTED);
00609     if (HasBit(src->vehicle_flags, VF_AUTOFILL_TIMETABLE)) SetBit(this->vehicle_flags, VF_AUTOFILL_TIMETABLE);
00610     if (HasBit(src->vehicle_flags, VF_AUTOFILL_PRES_WAIT_TIME)) SetBit(this->vehicle_flags, VF_AUTOFILL_PRES_WAIT_TIME);
00611 
00612     this->service_interval = src->service_interval;
00613   }
00614 
00615 
00616   bool HandleBreakdown();
00617 
00618   bool NeedsAutorenewing(const Company *c) const;
00619 
00620   bool NeedsServicing() const;
00621   bool NeedsAutomaticServicing() const;
00622 
00630   virtual TileIndex GetOrderStationLocation(StationID station) { return INVALID_TILE; }
00631 
00640   virtual bool FindClosestDepot(TileIndex *location, DestinationID *destination, bool *reverse) { return false; }
00641 
00642   CommandCost SendToDepot(DoCommandFlag flags, DepotCommand command);
00643 
00644   void UpdateVisualEffect(bool allow_power_change = true);
00645   void ShowVisualEffect() const;
00646 
00647 private:
00652   void SkipToNextRealOrderIndex()
00653   {
00654     if (this->GetNumManualOrders() > 0) {
00655       /* Advance to next real order */
00656       do {
00657         this->cur_real_order_index++;
00658         if (this->cur_real_order_index >= this->GetNumOrders()) this->cur_real_order_index = 0;
00659       } while (this->GetOrder(this->cur_real_order_index)->IsType(OT_IMPLICIT));
00660     } else {
00661       this->cur_real_order_index = 0;
00662     }
00663   }
00664 
00665 public:
00671   void IncrementImplicitOrderIndex()
00672   {
00673     if (this->cur_implicit_order_index == this->cur_real_order_index) {
00674       /* Increment real order index as well */
00675       this->SkipToNextRealOrderIndex();
00676     }
00677 
00678     assert(this->cur_real_order_index == 0 || this->cur_real_order_index < this->GetNumOrders());
00679 
00680     /* Advance to next implicit order */
00681     do {
00682       this->cur_implicit_order_index++;
00683       if (this->cur_implicit_order_index >= this->GetNumOrders()) this->cur_implicit_order_index = 0;
00684     } while (this->cur_implicit_order_index != this->cur_real_order_index && !this->GetOrder(this->cur_implicit_order_index)->IsType(OT_IMPLICIT));
00685 
00686     InvalidateVehicleOrder(this, 0);
00687   }
00688 
00695   void IncrementRealOrderIndex()
00696   {
00697     if (this->cur_implicit_order_index == this->cur_real_order_index) {
00698       /* Increment both real and implicit order */
00699       this->IncrementImplicitOrderIndex();
00700     } else {
00701       /* Increment real order only */
00702       this->SkipToNextRealOrderIndex();
00703       InvalidateVehicleOrder(this, 0);
00704     }
00705   }
00706 
00710   void UpdateRealOrderIndex()
00711   {
00712     /* Make sure the index is valid */
00713     if (this->cur_real_order_index >= this->GetNumOrders()) this->cur_real_order_index = 0;
00714 
00715     if (this->GetNumManualOrders() > 0) {
00716       /* Advance to next real order */
00717       while (this->GetOrder(this->cur_real_order_index)->IsType(OT_IMPLICIT)) {
00718         this->cur_real_order_index++;
00719         if (this->cur_real_order_index >= this->GetNumOrders()) this->cur_real_order_index = 0;
00720       }
00721     } else {
00722       this->cur_real_order_index = 0;
00723     }
00724   }
00725 
00731   inline Order *GetOrder(int index) const
00732   {
00733     return (this->orders.list == NULL) ? NULL : this->orders.list->GetOrderAt(index);
00734   }
00735 
00740   inline Order *GetLastOrder() const
00741   {
00742     return (this->orders.list == NULL) ? NULL : this->orders.list->GetLastOrder();
00743   }
00744 
00745   bool IsEngineCountable() const;
00746   bool HasEngineType() const;
00747   bool HasDepotOrder() const;
00748   void HandlePathfindingResult(bool path_found);
00749 
00754   inline bool IsFrontEngine() const
00755   {
00756     return this->IsGroundVehicle() && HasBit(this->subtype, GVSF_FRONT);
00757   }
00758 
00763   inline bool IsArticulatedPart() const
00764   {
00765     return this->IsGroundVehicle() && HasBit(this->subtype, GVSF_ARTICULATED_PART);
00766   }
00767 
00772   inline bool HasArticulatedPart() const
00773   {
00774     return this->Next() != NULL && this->Next()->IsArticulatedPart();
00775   }
00776 
00782   inline Vehicle *GetNextArticulatedPart() const
00783   {
00784     assert(this->HasArticulatedPart());
00785     return this->Next();
00786   }
00787 
00792   inline Vehicle *GetFirstEnginePart()
00793   {
00794     Vehicle *v = this;
00795     while (v->IsArticulatedPart()) v = v->Previous();
00796     return v;
00797   }
00798 
00803   inline const Vehicle *GetFirstEnginePart() const
00804   {
00805     const Vehicle *v = this;
00806     while (v->IsArticulatedPart()) v = v->Previous();
00807     return v;
00808   }
00809 
00814   inline Vehicle *GetLastEnginePart()
00815   {
00816     Vehicle *v = this;
00817     while (v->HasArticulatedPart()) v = v->GetNextArticulatedPart();
00818     return v;
00819   }
00820 
00825   inline Vehicle *GetNextVehicle() const
00826   {
00827     const Vehicle *v = this;
00828     while (v->HasArticulatedPart()) v = v->GetNextArticulatedPart();
00829 
00830     /* v now contains the last articulated part in the engine */
00831     return v->Next();
00832   }
00833 
00838   inline Vehicle *GetPrevVehicle() const
00839   {
00840     Vehicle *v = this->Previous();
00841     while (v != NULL && v->IsArticulatedPart()) v = v->Previous();
00842 
00843     return v;
00844   }
00845 };
00846 
00852 #define FOR_ALL_VEHICLES_FROM(var, start) FOR_ALL_ITEMS_FROM(Vehicle, vehicle_index, var, start)
00853 
00858 #define FOR_ALL_VEHICLES(var) FOR_ALL_VEHICLES_FROM(var, 0)
00859 
00864 template <class T, VehicleType Type>
00865 struct SpecializedVehicle : public Vehicle {
00866   static const VehicleType EXPECTED_TYPE = Type; 
00867 
00868   typedef SpecializedVehicle<T, Type> SpecializedVehicleBase; 
00869 
00873   inline SpecializedVehicle<T, Type>() : Vehicle(Type) { }
00874 
00879   inline T *First() const { return (T *)this->Vehicle::First(); }
00880 
00885   inline T *Last() { return (T *)this->Vehicle::Last(); }
00886 
00891   inline const T *Last() const { return (const T *)this->Vehicle::Last(); }
00892 
00897   inline T *Next() const { return (T *)this->Vehicle::Next(); }
00898 
00903   inline T *Previous() const { return (T *)this->Vehicle::Previous(); }
00904 
00910   inline T *GetNextArticulatedPart() { return (T *)this->Vehicle::GetNextArticulatedPart(); }
00911 
00917   inline T *GetNextArticulatedPart() const { return (T *)this->Vehicle::GetNextArticulatedPart(); }
00918 
00923   inline T *GetFirstEnginePart() { return (T *)this->Vehicle::GetFirstEnginePart(); }
00924 
00929   inline const T *GetFirstEnginePart() const { return (const T *)this->Vehicle::GetFirstEnginePart(); }
00930 
00935   inline T *GetLastEnginePart() { return (T *)this->Vehicle::GetLastEnginePart(); }
00936 
00941   inline T *GetNextVehicle() const { return (T *)this->Vehicle::GetNextVehicle(); }
00942 
00947   inline T *GetPrevVehicle() const { return (T *)this->Vehicle::GetPrevVehicle(); }
00948 
00954   static inline bool IsValidID(size_t index)
00955   {
00956     return Vehicle::IsValidID(index) && Vehicle::Get(index)->type == Type;
00957   }
00958 
00963   static inline T *Get(size_t index)
00964   {
00965     return (T *)Vehicle::Get(index);
00966   }
00967 
00972   static inline T *GetIfValid(size_t index)
00973   {
00974     return IsValidID(index) ? Get(index) : NULL;
00975   }
00976 
00982   static inline T *From(Vehicle *v)
00983   {
00984     assert(v->type == Type);
00985     return (T *)v;
00986   }
00987 
00993   static inline const T *From(const Vehicle *v)
00994   {
00995     assert(v->type == Type);
00996     return (const T *)v;
00997   }
00998 
01004   inline void UpdateViewport(bool force_update, bool update_delta)
01005   {
01006     extern void VehicleUpdateViewport(Vehicle *v, bool dirty);
01007 
01008     /* Explicitly choose method to call to prevent vtable dereference -
01009      * it gives ~3% runtime improvements in games with many vehicles */
01010     if (update_delta) ((T *)this)->T::UpdateDeltaXY(this->direction);
01011     SpriteID old_image = this->cur_image;
01012     this->cur_image = ((T *)this)->T::GetImage(this->direction, EIT_ON_MAP);
01013     if (force_update || this->cur_image != old_image) VehicleUpdateViewport(this, true);
01014   }
01015 };
01016 
01022 #define FOR_ALL_VEHICLES_OF_TYPE(name, var) FOR_ALL_ITEMS_FROM(name, vehicle_index, var, 0) if (var->type == name::EXPECTED_TYPE)
01023 
01027 struct DisasterVehicle FINAL : public SpecializedVehicle<DisasterVehicle, VEH_DISASTER> {
01028   SpriteID image_override;            
01029   VehicleID big_ufo_destroyer_target; 
01030 
01032   DisasterVehicle() : SpecializedVehicleBase() {}
01034   virtual ~DisasterVehicle() {}
01035 
01036   void UpdateDeltaXY(Direction direction);
01037   bool Tick();
01038 };
01039 
01044 #define FOR_ALL_DISASTERVEHICLES(var) FOR_ALL_VEHICLES_OF_TYPE(DisasterVehicle, var)
01045 
01047 struct FreeUnitIDGenerator {
01048   bool *cache;  
01049   UnitID maxid; 
01050   UnitID curid; 
01051 
01052   FreeUnitIDGenerator(VehicleType type, CompanyID owner);
01053   UnitID NextID();
01054 
01056   ~FreeUnitIDGenerator() { free(this->cache); }
01057 };
01058 
01060 static const int32 INVALID_COORD = 0x7fffffff;
01061 
01062 #endif /* VEHICLE_BASE_H */