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 *hash_viewport_next;        
00165   Vehicle **hash_viewport_prev;       
00166 
00167   Vehicle *hash_tile_next;            
00168   Vehicle **hash_tile_prev;           
00169   Vehicle **hash_tile_current;        
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 
00197   byte spritenum;
00198   SpriteID cur_image;                 
00199   byte x_extent;                      
00200   byte y_extent;                      
00201   byte z_extent;                      
00202   int8 x_bb_offs;                     
00203   int8 y_bb_offs;                     
00204   int8 x_offs;                        
00205   int8 y_offs;                        
00206   EngineID engine_type;               
00207 
00208   TextEffectID fill_percent_te_id;    
00209   UnitID unitnumber;                  
00210 
00211   uint16 cur_speed;                   
00212   byte subspeed;                      
00213   byte acceleration;                  
00214   uint32 motion_counter;              
00215   byte progress;                      
00216 
00217   byte random_bits;                   
00218   byte waiting_triggers;              
00219 
00220   StationID last_station_visited;     
00221   StationID last_loading_station;     
00222 
00223   CargoID cargo_type;                 
00224   byte cargo_subtype;                 
00225   uint16 cargo_cap;                   
00226   uint16 refit_cap;                   
00227   VehicleCargoList cargo;             
00228   uint16 cargo_age_counter;           
00229 
00230   byte day_counter;                   
00231   byte tick_counter;                  
00232   byte running_ticks;                 
00233 
00234   byte vehstatus;                     
00235   Order current_order;                
00236   VehicleOrderID cur_real_order_index;
00237   VehicleOrderID cur_implicit_order_index;
00238 
00239   union {
00240     OrderList *list;            
00241     Order     *old;             
00242   } orders;                           
00243 
00244   byte vehicle_flags;                 
00245 
00246   uint16 load_unload_ticks;           
00247   GroupID group_id;                   
00248   byte subtype;                       
00249 
00250   NewGRFCache grf_cache;              
00251   VehicleCache vcache;                
00252 
00253   Vehicle(VehicleType type = VEH_INVALID);
00254 
00255   void PreDestructor();
00257   virtual ~Vehicle();
00258 
00259   void BeginLoading();
00260   void CancelReservation(StationID next, Station *st);
00261   void LeaveStation();
00262 
00263   GroundVehicleCache *GetGroundVehicleCache();
00264   const GroundVehicleCache *GetGroundVehicleCache() const;
00265 
00266   uint16 &GetGroundVehicleFlags();
00267   const uint16 &GetGroundVehicleFlags() const;
00268 
00269   void DeleteUnreachedImplicitOrders();
00270 
00271   void HandleLoading(bool mode = false);
00272 
00273   void GetConsistFreeCapacities(SmallMap<CargoID, uint> &capacities) const;
00274 
00275   uint GetConsistTotalCapacity() const;
00276 
00285   virtual void MarkDirty() {}
00286 
00292   virtual void UpdateDeltaXY(Direction direction) {}
00293 
00307   inline uint GetOldAdvanceSpeed(uint speed)
00308   {
00309     return (this->direction & 1) ? speed : speed * 3 / 4;
00310   }
00311 
00324   static inline uint GetAdvanceSpeed(uint speed)
00325   {
00326     return speed * 3 / 4;
00327   }
00328 
00336   inline uint GetAdvanceDistance()
00337   {
00338     return (this->direction & 1) ? 192 : 256;
00339   }
00340 
00345   virtual ExpensesType GetExpenseType(bool income) const { return EXPENSES_OTHER; }
00346 
00350   virtual void PlayLeaveStationSound() const {}
00351 
00355   virtual bool IsPrimaryVehicle() const { return false; }
00356 
00357   const Engine *GetEngine() const;
00358 
00364   virtual SpriteID GetImage(Direction direction, EngineImageType image_type) const { return 0; }
00365 
00366   const GRFFile *GetGRF() const;
00367   uint32 GetGRFID() const;
00368 
00373   inline void InvalidateNewGRFCache()
00374   {
00375     this->grf_cache.cache_valid = 0;
00376   }
00377 
00382   inline void InvalidateNewGRFCacheOfChain()
00383   {
00384     for (Vehicle *u = this; u != NULL; u = u->Next()) {
00385       u->InvalidateNewGRFCache();
00386     }
00387   }
00388 
00393   inline bool IsGroundVehicle() const
00394   {
00395     return this->type == VEH_TRAIN || this->type == VEH_ROAD;
00396   }
00397 
00402   virtual int GetDisplaySpeed() const { return 0; }
00403 
00408   virtual int GetDisplayMaxSpeed() const { return 0; }
00409 
00414   virtual int GetCurrentMaxSpeed() const { return 0; }
00415 
00420   virtual Money GetRunningCost() const { return 0; }
00421 
00426   virtual bool IsInDepot() const { return false; }
00427 
00432   virtual bool IsStoppedInDepot() const { return this->IsInDepot() && (this->vehstatus & VS_STOPPED) != 0; }
00433 
00438   virtual bool Tick() { return true; };
00439 
00443   virtual void OnNewDay() {};
00444 
00450   virtual uint Crash(bool flooded = false);
00451 
00464   virtual Trackdir GetVehicleTrackdir() const { return INVALID_TRACKDIR; }
00465 
00470   Money GetDisplayRunningCost() const { return (this->GetRunningCost() >> 8); }
00471 
00476   Money GetDisplayProfitThisYear() const { return (this->profit_this_year >> 8); }
00477 
00482   Money GetDisplayProfitLastYear() const { return (this->profit_last_year >> 8); }
00483 
00484   void SetNext(Vehicle *next);
00485 
00491   inline Vehicle *Next() const { return this->next; }
00492 
00498   inline Vehicle *Previous() const { return this->previous; }
00499 
00504   inline Vehicle *First() const { return this->first; }
00505 
00510   inline Vehicle *Last()
00511   {
00512     Vehicle *v = this;
00513     while (v->Next() != NULL) v = v->Next();
00514     return v;
00515   }
00516 
00521   inline const Vehicle *Last() const
00522   {
00523     const Vehicle *v = this;
00524     while (v->Next() != NULL) v = v->Next();
00525     return v;
00526   }
00527 
00533   inline Vehicle *Move(int n)
00534   {
00535     Vehicle *v = this;
00536     if (n < 0) {
00537       for (int i = 0; i != n && v != NULL; i--) v = v->Previous();
00538     } else {
00539       for (int i = 0; i != n && v != NULL; i++) v = v->Next();
00540     }
00541     return v;
00542   }
00543 
00548   inline Order *GetFirstOrder() const { return (this->orders.list == NULL) ? NULL : this->orders.list->GetFirstOrder(); }
00549 
00550   void AddToShared(Vehicle *shared_chain);
00551   void RemoveFromShared();
00552 
00557   inline Vehicle *NextShared() const { return this->next_shared; }
00558 
00563   inline Vehicle *PreviousShared() const { return this->previous_shared; }
00564 
00569   inline Vehicle *FirstShared() const { return (this->orders.list == NULL) ? this->First() : this->orders.list->GetFirstSharedVehicle(); }
00570 
00575   inline bool IsOrderListShared() const { return this->orders.list != NULL && this->orders.list->IsShared(); }
00576 
00581   inline VehicleOrderID GetNumOrders() const { return (this->orders.list == NULL) ? 0 : this->orders.list->GetNumOrders(); }
00582 
00587   inline VehicleOrderID GetNumManualOrders() const { return (this->orders.list == NULL) ? 0 : this->orders.list->GetNumManualOrders(); }
00588 
00593   inline StationID GetNextStoppingStation() const
00594   {
00595     return (this->orders.list == NULL) ? INVALID_STATION : this->orders.list->GetNextStoppingStation(this);
00596   }
00597 
00598   void RefreshNextHopsStats();
00599 
00606   inline void CopyVehicleConfigAndStatistics(const Vehicle *src)
00607   {
00608     this->unitnumber = src->unitnumber;
00609 
00610     this->cur_real_order_index = src->cur_real_order_index;
00611     this->cur_implicit_order_index = src->cur_implicit_order_index;
00612     this->current_order = src->current_order;
00613     this->dest_tile  = src->dest_tile;
00614 
00615     this->profit_this_year = src->profit_this_year;
00616     this->profit_last_year = src->profit_last_year;
00617 
00618     this->current_order_time = src->current_order_time;
00619     this->lateness_counter = src->lateness_counter;
00620     this->timetable_start = src->timetable_start;
00621 
00622     if (HasBit(src->vehicle_flags, VF_TIMETABLE_STARTED)) SetBit(this->vehicle_flags, VF_TIMETABLE_STARTED);
00623     if (HasBit(src->vehicle_flags, VF_AUTOFILL_TIMETABLE)) SetBit(this->vehicle_flags, VF_AUTOFILL_TIMETABLE);
00624     if (HasBit(src->vehicle_flags, VF_AUTOFILL_PRES_WAIT_TIME)) SetBit(this->vehicle_flags, VF_AUTOFILL_PRES_WAIT_TIME);
00625 
00626     this->service_interval = src->service_interval;
00627   }
00628 
00629 
00630   bool HandleBreakdown();
00631 
00632   bool NeedsAutorenewing(const Company *c, bool use_renew_setting = true) const;
00633 
00634   bool NeedsServicing() const;
00635   bool NeedsAutomaticServicing() const;
00636 
00644   virtual TileIndex GetOrderStationLocation(StationID station) { return INVALID_TILE; }
00645 
00654   virtual bool FindClosestDepot(TileIndex *location, DestinationID *destination, bool *reverse) { return false; }
00655 
00656   CommandCost SendToDepot(DoCommandFlag flags, DepotCommand command);
00657 
00658   void UpdateVisualEffect(bool allow_power_change = true);
00659   void ShowVisualEffect() const;
00660 
00661 private:
00666   void SkipToNextRealOrderIndex()
00667   {
00668     if (this->GetNumManualOrders() > 0) {
00669       /* Advance to next real order */
00670       do {
00671         this->cur_real_order_index++;
00672         if (this->cur_real_order_index >= this->GetNumOrders()) this->cur_real_order_index = 0;
00673       } while (this->GetOrder(this->cur_real_order_index)->IsType(OT_IMPLICIT));
00674     } else {
00675       this->cur_real_order_index = 0;
00676     }
00677   }
00678 
00679 public:
00685   void IncrementImplicitOrderIndex()
00686   {
00687     if (this->cur_implicit_order_index == this->cur_real_order_index) {
00688       /* Increment real order index as well */
00689       this->SkipToNextRealOrderIndex();
00690     }
00691 
00692     assert(this->cur_real_order_index == 0 || this->cur_real_order_index < this->GetNumOrders());
00693 
00694     /* Advance to next implicit order */
00695     do {
00696       this->cur_implicit_order_index++;
00697       if (this->cur_implicit_order_index >= this->GetNumOrders()) this->cur_implicit_order_index = 0;
00698     } while (this->cur_implicit_order_index != this->cur_real_order_index && !this->GetOrder(this->cur_implicit_order_index)->IsType(OT_IMPLICIT));
00699 
00700     InvalidateVehicleOrder(this, 0);
00701   }
00702 
00709   void IncrementRealOrderIndex()
00710   {
00711     if (this->cur_implicit_order_index == this->cur_real_order_index) {
00712       /* Increment both real and implicit order */
00713       this->IncrementImplicitOrderIndex();
00714     } else {
00715       /* Increment real order only */
00716       this->SkipToNextRealOrderIndex();
00717       InvalidateVehicleOrder(this, 0);
00718     }
00719   }
00720 
00724   void UpdateRealOrderIndex()
00725   {
00726     /* Make sure the index is valid */
00727     if (this->cur_real_order_index >= this->GetNumOrders()) this->cur_real_order_index = 0;
00728 
00729     if (this->GetNumManualOrders() > 0) {
00730       /* Advance to next real order */
00731       while (this->GetOrder(this->cur_real_order_index)->IsType(OT_IMPLICIT)) {
00732         this->cur_real_order_index++;
00733         if (this->cur_real_order_index >= this->GetNumOrders()) this->cur_real_order_index = 0;
00734       }
00735     } else {
00736       this->cur_real_order_index = 0;
00737     }
00738   }
00739 
00745   inline Order *GetOrder(int index) const
00746   {
00747     return (this->orders.list == NULL) ? NULL : this->orders.list->GetOrderAt(index);
00748   }
00749 
00754   inline Order *GetLastOrder() const
00755   {
00756     return (this->orders.list == NULL) ? NULL : this->orders.list->GetLastOrder();
00757   }
00758 
00759   bool IsEngineCountable() const;
00760   bool HasEngineType() const;
00761   bool HasDepotOrder() const;
00762   void HandlePathfindingResult(bool path_found);
00763 
00768   inline bool IsFrontEngine() const
00769   {
00770     return this->IsGroundVehicle() && HasBit(this->subtype, GVSF_FRONT);
00771   }
00772 
00777   inline bool IsArticulatedPart() const
00778   {
00779     return this->IsGroundVehicle() && HasBit(this->subtype, GVSF_ARTICULATED_PART);
00780   }
00781 
00786   inline bool HasArticulatedPart() const
00787   {
00788     return this->Next() != NULL && this->Next()->IsArticulatedPart();
00789   }
00790 
00796   inline Vehicle *GetNextArticulatedPart() const
00797   {
00798     assert(this->HasArticulatedPart());
00799     return this->Next();
00800   }
00801 
00806   inline Vehicle *GetFirstEnginePart()
00807   {
00808     Vehicle *v = this;
00809     while (v->IsArticulatedPart()) v = v->Previous();
00810     return v;
00811   }
00812 
00817   inline const Vehicle *GetFirstEnginePart() const
00818   {
00819     const Vehicle *v = this;
00820     while (v->IsArticulatedPart()) v = v->Previous();
00821     return v;
00822   }
00823 
00828   inline Vehicle *GetLastEnginePart()
00829   {
00830     Vehicle *v = this;
00831     while (v->HasArticulatedPart()) v = v->GetNextArticulatedPart();
00832     return v;
00833   }
00834 
00839   inline Vehicle *GetNextVehicle() const
00840   {
00841     const Vehicle *v = this;
00842     while (v->HasArticulatedPart()) v = v->GetNextArticulatedPart();
00843 
00844     /* v now contains the last articulated part in the engine */
00845     return v->Next();
00846   }
00847 
00852   inline Vehicle *GetPrevVehicle() const
00853   {
00854     Vehicle *v = this->Previous();
00855     while (v != NULL && v->IsArticulatedPart()) v = v->Previous();
00856 
00857     return v;
00858   }
00859 };
00860 
00866 #define FOR_ALL_VEHICLES_FROM(var, start) FOR_ALL_ITEMS_FROM(Vehicle, vehicle_index, var, start)
00867 
00872 #define FOR_ALL_VEHICLES(var) FOR_ALL_VEHICLES_FROM(var, 0)
00873 
00878 template <class T, VehicleType Type>
00879 struct SpecializedVehicle : public Vehicle {
00880   static const VehicleType EXPECTED_TYPE = Type; 
00881 
00882   typedef SpecializedVehicle<T, Type> SpecializedVehicleBase; 
00883 
00887   inline SpecializedVehicle<T, Type>() : Vehicle(Type) { }
00888 
00893   inline T *First() const { return (T *)this->Vehicle::First(); }
00894 
00899   inline T *Last() { return (T *)this->Vehicle::Last(); }
00900 
00905   inline const T *Last() const { return (const T *)this->Vehicle::Last(); }
00906 
00911   inline T *Next() const { return (T *)this->Vehicle::Next(); }
00912 
00917   inline T *Previous() const { return (T *)this->Vehicle::Previous(); }
00918 
00924   inline T *GetNextArticulatedPart() { return (T *)this->Vehicle::GetNextArticulatedPart(); }
00925 
00931   inline T *GetNextArticulatedPart() const { return (T *)this->Vehicle::GetNextArticulatedPart(); }
00932 
00937   inline T *GetFirstEnginePart() { return (T *)this->Vehicle::GetFirstEnginePart(); }
00938 
00943   inline const T *GetFirstEnginePart() const { return (const T *)this->Vehicle::GetFirstEnginePart(); }
00944 
00949   inline T *GetLastEnginePart() { return (T *)this->Vehicle::GetLastEnginePart(); }
00950 
00955   inline T *GetNextVehicle() const { return (T *)this->Vehicle::GetNextVehicle(); }
00956 
00961   inline T *GetPrevVehicle() const { return (T *)this->Vehicle::GetPrevVehicle(); }
00962 
00968   static inline bool IsValidID(size_t index)
00969   {
00970     return Vehicle::IsValidID(index) && Vehicle::Get(index)->type == Type;
00971   }
00972 
00977   static inline T *Get(size_t index)
00978   {
00979     return (T *)Vehicle::Get(index);
00980   }
00981 
00986   static inline T *GetIfValid(size_t index)
00987   {
00988     return IsValidID(index) ? Get(index) : NULL;
00989   }
00990 
00996   static inline T *From(Vehicle *v)
00997   {
00998     assert(v->type == Type);
00999     return (T *)v;
01000   }
01001 
01007   static inline const T *From(const Vehicle *v)
01008   {
01009     assert(v->type == Type);
01010     return (const T *)v;
01011   }
01012 
01018   inline void UpdateViewport(bool force_update, bool update_delta)
01019   {
01020     extern void VehicleUpdateViewport(Vehicle *v, bool dirty);
01021 
01022     /* Explicitly choose method to call to prevent vtable dereference -
01023      * it gives ~3% runtime improvements in games with many vehicles */
01024     if (update_delta) ((T *)this)->T::UpdateDeltaXY(this->direction);
01025     SpriteID old_image = this->cur_image;
01026     this->cur_image = ((T *)this)->T::GetImage(this->direction, EIT_ON_MAP);
01027     if (force_update || this->cur_image != old_image) VehicleUpdateViewport(this, true);
01028   }
01029 };
01030 
01036 #define FOR_ALL_VEHICLES_OF_TYPE(name, var) FOR_ALL_ITEMS_FROM(name, vehicle_index, var, 0) if (var->type == name::EXPECTED_TYPE)
01037 
01041 struct DisasterVehicle FINAL : public SpecializedVehicle<DisasterVehicle, VEH_DISASTER> {
01042   SpriteID image_override;            
01043   VehicleID big_ufo_destroyer_target; 
01044 
01046   DisasterVehicle() : SpecializedVehicleBase() {}
01048   virtual ~DisasterVehicle() {}
01049 
01050   void UpdateDeltaXY(Direction direction);
01051   bool Tick();
01052 };
01053 
01058 #define FOR_ALL_DISASTERVEHICLES(var) FOR_ALL_VEHICLES_OF_TYPE(DisasterVehicle, var)
01059 
01061 struct FreeUnitIDGenerator {
01062   bool *cache;  
01063   UnitID maxid; 
01064   UnitID curid; 
01065 
01066   FreeUnitIDGenerator(VehicleType type, CompanyID owner);
01067   UnitID NextID();
01068 
01070   ~FreeUnitIDGenerator() { free(this->cache); }
01071 };
01072 
01074 static const int32 INVALID_COORD = 0x7fffffff;
01075 
01076 #endif /* VEHICLE_BASE_H */