# 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 */