src/engine_base.h

   1 /* $Id$ */
   2
   3 /*
   4  * This file is part of OpenTTD.
   5  * 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.
   6  * 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.
   7  * 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/>.
   8  */
   9
  10 /** @file engine_base.h Base class for engines. */
  11
  12 #ifndef ENGINE_BASE_H
  13 #define ENGINE_BASE_H
  14
  15 #include "engine_type.h"
  16 #include "vehicle_type.h"
  17 #include "core/pool_type.hpp"
  18 #include "newgrf_commons.h"
  19
  20 typedef Pool<Engine, EngineID, 64, 64000> EnginePool;
  21 extern EnginePool _engine_pool;
  22
  23 struct Engine : EnginePool::PoolItem<&_engine_pool> {
  24         char *name;                 ///< Custom name of engine.
  25         Date intro_date;            ///< Date of introduction of the engine.
  26         Date age;
  27         uint16 reliability;         ///< Current reliability of the engine.
  28         uint16 reliability_spd_dec; ///< Speed of reliability decay between services (per day).
  29         uint16 reliability_start;   ///< Initial reliability of the engine.
  30         uint16 reliability_max;     ///< Maximal reliability of the engine.
  31         uint16 reliability_final;   ///< Final reliability of the engine.
  32         uint16 duration_phase_1;    ///< First reliability phase in months, increasing reliability from #reliability_start to #reliability_max.
  33         uint16 duration_phase_2;    ///< Second reliability phase in months, keeping #reliability_max.
  34         uint16 duration_phase_3;    ///< Third reliability phase on months, decaying to #reliability_final.
  35         byte flags;                 ///< Flags of the engine. @see EngineFlags
  36         CompanyMask preview_asked;  ///< Bit for each company which has already been offered a preview.
  37         CompanyByte preview_company;///< Company which is currently being offered a preview \c INVALID_COMPANY means no company.
  38         byte preview_wait;          ///< Daily countdown timer for timeout of offering the engine to the #preview_company company.
  39         CompanyMask company_avail;  ///< Bit for each company whether the engine is available for that company.
  40         CompanyMask company_hidden; ///< Bit for each company whether the engine is normally hidden in the build gui for that company.
  41         uint8 original_image_index; ///< Original vehicle image index, thus the image index of the overridden vehicle
  42         VehicleType type;           ///< %Vehicle type, ie #VEH_ROAD, #VEH_TRAIN, etc.
  43
  44         EngineInfo info;
  45
  46         union {
  47                 RailVehicleInfo rail;
  48                 RoadVehicleInfo road;
  49                 ShipVehicleInfo ship;
  50                 AircraftVehicleInfo air;
  51         } u;
  52
  53         /* NewGRF related data */
  54         /**
  55          * Properties related the the grf file.
  56          * NUM_CARGO real cargo plus two pseudo cargo sprite groups.
  57          * Used for obtaining the sprite offset of custom sprites, and for
  58          * evaluating callbacks.
  59          */
  60         GRFFilePropsBase<NUM_CARGO + 2> grf_prop;
  61         uint16 overrides_count;
  62         struct WagonOverride *overrides;
  63         uint16 list_position;
  64
  65         Engine();
  66         Engine(VehicleType type, EngineID base);
  67         ~Engine();
  68         bool IsEnabled() const;
  69
  70         /**
  71          * Determines the default cargo type of an engine.
  72          *
  73          * Usually a valid cargo is returned, even though the vehicle has zero capacity, and can therefore not carry anything. But the cargotype is still used
  74          * for livery selection etc..
  75          *
  76          * Vehicles with CT_INVALID as default cargo are usually not available, but it can appear as default cargo of articulated parts.
  77          *
  78          * @return The default cargo type.
  79          * @see CanCarryCargo
  80          */
  81         CargoID GetDefaultCargoType() const
  82         {
  83                 return this->info.cargo_type;
  84         }
  85
  86         uint DetermineCapacity(const Vehicle *v, uint16 *mail_capacity = NULL) const;
  87
  88         bool CanCarryCargo() const;
  89
  90         /**
  91          * Determines the default cargo capacity of an engine for display purposes.
  92          *
  93          * For planes carrying both passenger and mail this is the passenger capacity.
  94          * For multiheaded engines this is the capacity of both heads.
  95          * For articulated engines use GetCapacityOfArticulatedParts
  96          *
  97          * @param mail_capacity returns secondary cargo (mail) capacity of aircraft
  98          * @return The default capacity
  99          * @see GetDefaultCargoType
 100          */
 101         uint GetDisplayDefaultCapacity(uint16 *mail_capacity = NULL) const
 102         {
 103                 return this->DetermineCapacity(NULL, mail_capacity);
 104         }
 105
 106         Money GetRunningCost() const;
 107         Money GetCost() const;
 108         uint GetDisplayMaxSpeed() const;
 109         uint GetPower() const;
 110         uint GetDisplayWeight() const;
 111         uint GetDisplayMaxTractiveEffort() const;
 112         Date GetLifeLengthInDays() const;
 113         uint16 GetRange() const;
 114         StringID GetAircraftTypeText() const;
 115
 116         /**
 117          * Check whether the engine is hidden in the GUI for the given company.
 118          * @param c Company to check.
 119          * @return \c true iff the engine is hidden in the GUI for the given company.
 120          */
 121         inline bool IsHidden(CompanyByte c) const
 122         {
 123                 return c < MAX_COMPANIES && HasBit(this->company_hidden, c);
 124         }
 125
 126         /**
 127          * Check if the engine is a ground vehicle.
 128          * @return True iff the engine is a train or a road vehicle.
 129          */
 130         inline bool IsGroundVehicle() const
 131         {
 132                 return this->type == VEH_TRAIN || this->type == VEH_ROAD;
 133         }
 134
 135         /**
 136          * Retrieve the NewGRF the engine is tied to.
 137          * This is the GRF providing the Action 3.
 138          * @return NewGRF associated to the engine.
 139          */
 140         const GRFFile *GetGRF() const
 141         {
 142                 return this->grf_prop.grffile;
 143         }
 144
 145         uint32 GetGRFID() const;
 146 };
 147
 148 struct EngineIDMapping {
 149         uint32 grfid;          ///< The GRF ID of the file the entity belongs to
 150         uint16 internal_id;    ///< The internal ID within the GRF file
 151         VehicleTypeByte type;  ///< The engine type
 152         uint8  substitute_id;  ///< The (original) entity ID to use if this GRF is not available (currently not used)
 153 };
 154
 155 /**
 156  * Stores the mapping of EngineID to the internal id of newgrfs.
 157  * Note: This is not part of Engine, as the data in the EngineOverrideManager and the engine pool get resetted in different cases.
 158  */
 159 struct EngineOverrideManager : SmallVector<EngineIDMapping, 256> {
 160         static const uint NUM_DEFAULT_ENGINES; ///< Number of default entries
 161
 162         void ResetToDefaultMapping();
 163         EngineID GetID(VehicleType type, uint16 grf_local_id, uint32 grfid);
 164
 165         static bool ResetToCurrentNewGRFConfig();
 166 };
 167
 168 extern EngineOverrideManager _engine_mngr;
 169
 170 #define FOR_ALL_ENGINES_FROM(var, start) FOR_ALL_ITEMS_FROM(Engine, engine_index, var, start)
 171 #define FOR_ALL_ENGINES(var) FOR_ALL_ENGINES_FROM(var, 0)
 172
 173 #define FOR_ALL_ENGINES_OF_TYPE(e, engine_type) FOR_ALL_ENGINES(e) if (e->type == engine_type)
 174
 175 static inline const EngineInfo *EngInfo(EngineID e)
 176 {
 177         return &Engine::Get(e)->info;
 178 }
 179
 180 static inline const RailVehicleInfo *RailVehInfo(EngineID e)
 181 {
 182         return &Engine::Get(e)->u.rail;
 183 }
 184
 185 static inline const RoadVehicleInfo *RoadVehInfo(EngineID e)
 186 {
 187         return &Engine::Get(e)->u.road;
 188 }
 189
 190 static inline const ShipVehicleInfo *ShipVehInfo(EngineID e)
 191 {
 192         return &Engine::Get(e)->u.ship;
 193 }
 194
 195 static inline const AircraftVehicleInfo *AircraftVehInfo(EngineID e)
 196 {
 197         return &Engine::Get(e)->u.air;
 198 }
 199
 200 #endif /* ENGINE_BASE_H */