# vehicle.cpp File Reference

Base implementations of all vehicles. More...

`#include "stdafx.h"`
`#include "gui.h"`
`#include "debug.h"`
`#include "roadveh.h"`
`#include "ship.h"`
`#include "spritecache.h"`
`#include "landscape.h"`
`#include "timetable.h"`
`#include "viewport_func.h"`
`#include "news_func.h"`
`#include "command_func.h"`
`#include "company_func.h"`
`#include "vehicle_gui.h"`
`#include "train.h"`
`#include "aircraft.h"`
`#include "newgrf_engine.h"`
`#include "newgrf_sound.h"`
`#include "newgrf_station.h"`
`#include "group.h"`
`#include "group_gui.h"`
`#include "strings_func.h"`
`#include "zoom_func.h"`
`#include "functions.h"`
`#include "date_func.h"`
`#include "window_func.h"`
`#include "vehicle_func.h"`
`#include "autoreplace_func.h"`
`#include "autoreplace_gui.h"`
`#include "station_base.h"`
`#include "ai/ai.hpp"`
`#include "core/smallmap_type.hpp"`
`#include "depot_func.h"`
`#include "network/network.h"`
`#include "core/pool_func.hpp"`
`#include "economy_base.h"`
`#include "articulated_vehicles.h"`
`#include "roadstop_base.h"`
`#include "core/random_func.hpp"`
`#include "engine_base.h"`
`#include "newgrf.h"`
`#include "table/sprites.h"`
`#include "table/strings.h"`

Go to the source code of this file.

## Defines
#define | GEN_HASH(x, y) ((GB((y), 6, 6) << 6) + GB((x), 7, 6))
## Typedefs
typedef SmallMap< Vehicle *, bool, 4 > | AutoreplaceMap
| List of vehicles that should check for autoreplace this tick.
## Functions
void | VehicleServiceInDepot (Vehicle *v)
void | ShowNewGrfVehicleError (EngineID engine, StringID part1, StringID part2, GRFBugs bug_type, bool critical)
| Displays a "NewGrf Bug" error message for a engine, and pauses the game if not networking.
static Vehicle * | EnsureNoVehicleProcZ (Vehicle *v, void *data)
bool | EnsureNoVehicleOnGround (TileIndex tile)
static Vehicle * | GetVehicleTunnelBridgeProc (Vehicle *v, void *data)
| Procedure called for every vehicle found in tunnel/bridge in the hash map.
bool | HasVehicleOnTunnelBridge (TileIndex tile, TileIndex endtile, const Vehicle *ignore)
| Finds vehicle in tunnel / bridge.
byte | VehicleRandomBits ()
| Get a value for a vehicle's random_bits.
static Vehicle * | VehicleFromHash (int xl, int yl, int xu, int yu, void *data, VehicleFromPosProc *proc, bool find_first)
static Vehicle * | VehicleFromPosXY (int x, int y, void *data, VehicleFromPosProc *proc, bool find_first)
| Helper function for FindVehicleOnPos/HasVehicleOnPos.
void | FindVehicleOnPosXY (int x, int y, void *data, VehicleFromPosProc *proc)
| Find a vehicle from a specific location.
bool | HasVehicleOnPosXY (int x, int y, void *data, VehicleFromPosProc *proc)
| Checks whether a vehicle in on a specific location.
static Vehicle * | VehicleFromPos (TileIndex tile, void *data, VehicleFromPosProc *proc, bool find_first)
| Helper function for FindVehicleOnPos/HasVehicleOnPos.
void | FindVehicleOnPos (TileIndex tile, void *data, VehicleFromPosProc *proc)
| Find a vehicle from a specific location.
bool | HasVehicleOnPos (TileIndex tile, void *data, VehicleFromPosProc *proc)
| Checks whether a vehicle in on a specific location.
static void | UpdateNewVehiclePosHash (Vehicle *v, bool remove)
static void | UpdateVehiclePosHash (Vehicle *v, int x, int y)
void | ResetVehiclePosHash ()
void | ResetVehicleColourMap ()
void | InitializeVehicles ()
uint | CountVehiclesInChain (const Vehicle *v)
void | VehicleEnteredDepotThisTick (Vehicle *v)
| Adds a vehicle to the list of vehicles, that visited a depot this tick.
static void | RunVehicleDayProc ()
| Increases the day counter for all vehicles and calls 1-day and 32-day handlers.
void | CallVehicleTicks ()
static void | DoDrawVehicle (const Vehicle *v)
void | ViewportAddVehicles (DrawPixelInfo *dpi)
Vehicle * | CheckClickOnVehicle (const ViewPort *vp, int x, int y)
void | DecreaseVehicleValue (Vehicle *v)
void | CheckVehicleBreakdown (Vehicle *v)
void | AgeVehicle (Vehicle *v)
uint8 | CalcPercentVehicleFilled (const Vehicle *v, StringID *colour)
| Calculates how full a vehicle is.
void | VehicleEnterDepot (Vehicle *v)
void | VehicleMove (Vehicle *v, bool update_viewport)
| Move a vehicle in the game state; that is moving it's position in the position hashes and marking it's location in the viewport dirty if requested.
void | MarkSingleVehicleDirty (const Vehicle *v)
| Marks viewports dirty where the vehicle's image is In fact, it equals BeginVehicleMove(v); EndVehicleMove(v);.
GetNewVehiclePosResult | GetNewVehiclePos (const Vehicle *v)
| Get position information of a vehicle when moving one pixel in the direction it is facing.
Direction | GetDirectionTowards (const Vehicle *v, int x, int y)
VehicleEnterTileStatus | VehicleEnterTile (Vehicle *v, TileIndex tile, int x, int y)
| Call the tile callback function for a vehicle entering a tile.
UnitID | GetFreeUnitNumber (VehicleType type)
bool | CanBuildVehicleInfrastructure (VehicleType type)
| Check whether we can build infrastructure for the given vehicle type.
const Livery * | GetEngineLivery (EngineID engine_type, CompanyID company, EngineID parent_engine_type, const Vehicle *v)
| Determines the livery for a vehicle.
static PaletteID | GetEngineColourMap (EngineID engine_type, CompanyID company, EngineID parent_engine_type, const Vehicle *v)
PaletteID | GetEnginePalette (EngineID engine_type, CompanyID company)
| Get the colour map for an engine.
PaletteID | GetVehiclePalette (const Vehicle *v)
| Get the colour map for a vehicle.
uint | GetVehicleCapacity (const Vehicle *v, uint16 *mail_capacity)
| Determines capacity of a given vehicle from scratch.
void | StopAllVehicles ()
void | VehiclesYearlyLoop ()
bool | CanVehicleUseStation (EngineID engine_type, const Station *st)
| Can this station be used by the given engine type?
bool | CanVehicleUseStation (const Vehicle *v, const Station *st)
| Can this station be used by the given vehicle?
## Variables
VehicleID | _vehicle_id_ctr_day
const Vehicle * | _place_clicked_vehicle
VehicleID | _new_vehicle_id
uint16 | _returned_refit_capacity
byte | _age_cargo_skip_counter
| Skip aging of cargo?
VehiclePool | _vehicle_pool ("Vehicle")
const int | HASH_BITS = 7
const int | HASH_SIZE = 1 << HASH_BITS
const int | HASH_MASK = HASH_SIZE - 1
const int | TOTAL_HASH_SIZE = 1 << (HASH_BITS * 2)
const int | TOTAL_HASH_MASK = TOTAL_HASH_SIZE - 1
const int | HASH_RES = 0
static Vehicle * | _new_vehicle_position_hash [TOTAL_HASH_SIZE]
static Vehicle * | _vehicle_position_hash [0x1000]
static AutoreplaceMap | _vehicles_to_autoreplace
static const byte | _breakdown_chance [64]
static const Direction | _new_direction_table []

## Detailed Description

Base implementations of all vehicles.

Definition in file vehicle.cpp.

## Typedef Documentation

typedef SmallMap<Vehicle *, bool, 4> AutoreplaceMap

List of vehicles that should check for autoreplace this tick.

Mapping of vehicle -> leave depot immediatelly after autoreplace.

Definition at line 513 of file vehicle.cpp.

## Function Documentation

uint8 CalcPercentVehicleFilled | ( | const Vehicle * | v,
|  | StringID * | colour |
| ) |  |  |

Calculates how full a vehicle is.

Parameters:

  | v | The Vehicle to check. For trains, use the first engine.
  | colour | The string to show depending on if we are unloading or loading

Returns:
  A percentage of how full the Vehicle is.

Definition at line 950 of file vehicle.cpp.

References Vehicle::cargo, Vehicle::cargo_cap, Vehicle::cargo_type, CargoList< Tinst >::Count(), Vehicle::current_order, SpecializedStation< Station, false >::Get(), Order::GetLoadType(), Station::goods, HasBit(), max(), Vehicle::Next(), OLFB_NO_LOAD, and Vehicle::vehicle_flags.

Referenced by LoadUnloadVehicle(), and ProcessConditionalOrder().

bool CanBuildVehicleInfrastructure | ( | VehicleType | type | ) |

Check whether we can build infrastructure for the given vehicle type.

This to disable building stations etc. when you are not allowed/able to have the vehicle type yet.

Parameters:

  | type | the vehicle type to check this for

Returns:
  true if there is any reason why you may build the infrastructure for the given vehicle type

Definition at line 1255 of file vehicle.cpp.

References _settings_client, _settings_game, GUISettings::always_build_infrastructure, ClientSettings::gui, HasBit(), Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tcache, Tzero >::PoolItem<&_company_pool >::IsValidID(), max(), VehicleSettings::max_aircraft, VehicleSettings::max_roadveh, VehicleSettings::max_ships, VehicleSettings::max_trains, BaseVehicle::type, VEH_AIRCRAFT, VEH_ROAD, VEH_SHIP, VEH_TRAIN, and GameSettings::vehicle.

Referenced by MainToolbarWindow::OnKeyPress(), MainToolbarWindow::OnPaint(), and BuildDocksToolbarWindow::OnPaint().

bool CanVehicleUseStation | ( | const Vehicle * | v,
|  | const Station * | st |
| ) |  |  |

Can this station be used by the given vehicle?

Parameters:

  | v | the vehicle to test
  | st | the station to test for

Returns:
  true if and only if the vehicle can use this station.

Definition at line 1838 of file vehicle.cpp.

References CanVehicleUseStation(), SpecializedVehicle< RoadVehicle, VEH_ROAD >::From(), BaseVehicle::type, and VEH_ROAD.

bool CanVehicleUseStation | ( | EngineID | engine_type,
|  | const Station * | st |
| ) |  |  |

Can this station be used by the given engine type?

Parameters:

  | engine_type | the type of vehicles to test
  | st | the station to test for

Returns:
  true if and only if the vehicle of the type can use this station.

Note:
  For road vehicles the Vehicle is needed to determine whether it can use the station. This function will return true for road vehicles when at least one of the facilities is available.

Definition at line 1805 of file vehicle.cpp.

References AIR_CTOL, FACIL_AIRPORT, FACIL_BUS_STOP, FACIL_DOCK, FACIL_TRAIN, FACIL_TRUCK_STOP, BaseStation::facilities, Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tcache, Tzero >::PoolItem<&_engine_pool >::GetIfValid(), Engine::type, VEH_AIRCRAFT, VEH_ROAD, VEH_SHIP, and VEH_TRAIN.

Referenced by CanVehicleUseStation(), CheckOrders(), CmdBuildAircraft(), CmdCloneOrder(), CmdInsertOrder(), and RoadVehicle::GetOrderStationLocation().

void FindVehicleOnPos | ( | TileIndex | tile,
|  | void * | data,
|  | VehicleFromPosProc * | proc |
| ) |  |  |

Find a vehicle from a specific location.

It will call proc for ALL vehicles on the tile and YOU must make SURE that the "best one" is stored in the data value and is ALWAYS the same regardless of the order of the vehicles where proc was called on! When you fail to do this properly you create an almost untraceable DESYNC!

Note:
  The return value of proc will be ignored.
  Use this when you have the intention that all vehicles should be iterated over.

Parameters:

  | tile | The location on the map
  | data | Arbitrary data passed to proc
  | proc | The proc that determines whether a vehicle will be "found".

Definition at line 411 of file vehicle.cpp.

References VehicleFromPos().

Referenced by CheckTrainCollision(), CmdConvertRail(), DeleteLastWagon(), FloodVehicles(), FollowTrainReservation(), GetTrainForReservation(), RoadStop::Entry::Rebuild(), and RemoveRoadStop().

void FindVehicleOnPosXY | ( | int | x,
|  | int | y,
|  | void * | data,
|  | VehicleFromPosProc * | proc |
| ) |  |  |

Find a vehicle from a specific location.

It will call proc for ALL vehicles on the tile and YOU must make SURE that the "best one" is stored in the data value and is ALWAYS the same regardless of the order of the vehicles where proc was called on! When you fail to do this properly you create an almost untraceable DESYNC!

Note:
  The return value of proc will be ignored.
  Use this when you have the intention that all vehicles should be iterated over.

Parameters:

  | x | The X location on the map
  | y | The Y location on the map
  | data | Arbitrary data passed to proc
  | proc | The proc that determines whether a vehicle will be "found".

Definition at line 351 of file vehicle.cpp.

References VehicleFromPosXY().

Referenced by CheckTrainCollision().

const Livery* GetEngineLivery | ( | EngineID | engine_type,
|  | CompanyID | company,
|  | EngineID | parent_engine_type,
|  | const Vehicle * | v |
| ) |  |  | `[read]`

Determines the livery for a vehicle.

Parameters:

  | engine_type | EngineID of the vehicle
  | company | Owner of the vehicle
  | parent_engine_type | EngineID of the front vehicle. INVALID_VEHICLE if vehicle is at front itself.
  | v | the vehicle. NULL if in purchase list etc.

Returns:
  livery to use

Definition at line 1299 of file vehicle.cpp.

References _settings_client, AIR_CTOL, Vehicle::cargo_type, CC_PASSENGERS, CT_INVALID, EF_RAIL_IS_MU, EF_ROAD_TRAM, RailVehicleInfo::engclass, Vehicle::First(), SpecializedVehicle< Train, VEH_TRAIN >::From(), CargoSpec::Get(), Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tcache, Tzero >::PoolItem<&_engine_pool >::Get(), Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tcache, Tzero >::PoolItem<&_company_pool >::Get(), Engine::GetDefaultCargoType(), ClientSettings::gui, HasBit(), Livery::in_use, IsCargoInClass(), GUISettings::liveries, RAILVEH_WAGON, Engine::type, UsesWagonOverride(), VEH_AIRCRAFT, VEH_ROAD, VEH_SHIP, and VEH_TRAIN.

PaletteID GetEnginePalette | ( | EngineID | engine_type,
|  | CompanyID | company |
| ) |  |  |

Get the colour map for an engine.

This used for unbuilt engines in the user interface.

Parameters:

  | engine_type | ID of engine
  | company | ID of company

Returns:
  A ready-to-use palette modifier

Definition at line 1444 of file vehicle.cpp.

Referenced by DrawEngineList(), NewsWindow::DrawWidget(), and EnginePreviewWindow::DrawWidget().

GetNewVehiclePosResult GetNewVehiclePos | ( | const Vehicle * | v | ) |

Get position information of a vehicle when moving one pixel in the direction it is facing.

Parameters:

  | v | Vehicle to move

Returns:
  Position information after the move

Definition at line 1146 of file vehicle.cpp.

References GetNewVehiclePosResult::new_tile, GetNewVehiclePosResult::old_tile, Vehicle::tile, and GetNewVehiclePosResult::y.

Referenced by AircraftController(), DisasterTick_Aircraft(), DisasterTick_Big_Ufo(), DisasterTick_Big_Ufo_Destroyer(), DisasterTick_Submarine(), DisasterTick_Ufo(), DisasterTick_Zeppeliner(), UpdateAirplanesOnNewStation(), and UpdateOldAircraft().

uint GetVehicleCapacity | ( | const Vehicle * | v,
|  | uint16 * | mail_capacity |
| ) |  |  |

Determines capacity of a given vehicle from scratch.

For aircraft the main capacity is determined. Mail might be present as well.

Note:
  Keep this function consistent with Engine::GetDisplayDefaultCapacity().

Parameters:

  | v | Vehicle of interest
  | mail_capacity | returns secondary cargo (mail) capacity of aircraft

Returns:
  Capacity

Definition at line 1468 of file vehicle.cpp.

References CALLBACK_FAILED, EngineInfo::callback_mask, Engine::CanCarryCargo(), RailVehicleInfo::capacity, Vehicle::cargo_subtype, Vehicle::cargo_type, CBID_VEHICLE_REFIT_CAPACITY, CBM_VEHICLE_REFIT_CAPACITY, CC_PASSENGERS, Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tcache, Tzero >::PoolItem<&_engine_pool >::Get(), Engine::GetDefaultCargoType(), GetVehicleCallback(), HasBit(), IsCargoInClass(), PROP_AIRCRAFT_MAIL_CAPACITY, PROP_AIRCRAFT_PASSENGER_CAPACITY, PROP_ROADVEH_CARGO_CAPACITY, PROP_SHIP_CARGO_CAPACITY, PROP_TRAIN_CARGO_CAPACITY, Engine::type, VEH_AIRCRAFT, VEH_ROAD, VEH_SHIP, and VEH_TRAIN.

Referenced by CmdBuildAircraft(), CmdBuildRoadVeh(), CmdBuildShip(), Train::ConsistChanged(), and RefitVehicle().

PaletteID GetVehiclePalette | ( | const Vehicle * | v | ) |

Get the colour map for a vehicle.

Parameters:

  | v | Vehicle to get colour map for

Returns:
  A ready-to-use palette modifier

Definition at line 1449 of file vehicle.cpp.

References RoadVehicleCache::first_engine, TrainCache::first_engine, SpecializedVehicle< RoadVehicle, VEH_ROAD >::From(), SpecializedVehicle< Train, VEH_TRAIN >::From(), RoadVehicle::rcache, BaseVehicle::type, VEH_ROAD, and VEH_TRAIN.

Referenced by DepotWindow::DepotClick(), DrawAircraftImage(), DrawRoadVehImage(), DrawShipImage(), DrawTrainDetails(), DrawTrainImage(), and VehicleGroupWindow::OnClick().

bool HasVehicleOnPos | ( | TileIndex | tile,
|  | void * | data,
|  | VehicleFromPosProc * | proc |
| ) |  |  |

Checks whether a vehicle in on a specific location.

It will call proc for vehicles until it returns non-NULL.

Note:
  Use FindVehicleOnPos when you have the intention that all vehicles should be iterated over.

Parameters:

  | tile | The location on the map
  | data | Arbitrary data passed to proc
  | proc | The proc that determines whether a vehicle will be "found".

Returns:
  True if proc returned non-NULL.

Definition at line 426 of file vehicle.cpp.

References VehicleFromPos().

Referenced by CheckRoadBlockedForOvertaking(), EnsureNoTrainOnTrack(), ExploreSegment(), HasVehicleOnTunnelBridge(), TrainApproachingCrossing(), and UpdateLevelCrossing().

bool HasVehicleOnPosXY | ( | int | x,
|  | int | y,
|  | void * | data,
|  | VehicleFromPosProc * | proc |
| ) |  |  |

Checks whether a vehicle in on a specific location.

It will call proc for vehicles until it returns non-NULL.

Note:
  Use FindVehicleOnPosXY when you have the intention that all vehicles should be iterated over.

Parameters:

  | x | The X location on the map
  | y | The Y location on the map
  | data | Arbitrary data passed to proc
  | proc | The proc that determines whether a vehicle will be "found".

Returns:
  True if proc returned non-NULL.

Definition at line 367 of file vehicle.cpp.

References VehicleFromPosXY().

bool HasVehicleOnTunnelBridge | ( | TileIndex | tile,
|  | TileIndex | endtile,
|  | const Vehicle * | ignore |
| ) |  |  |

Finds vehicle in tunnel / bridge.

Parameters:

  | tile | first end
  | endtile | second end
  | ignore | Ignore this vehicle when searching

Returns:
  true if the bridge has a vehicle

Definition at line 255 of file vehicle.cpp.

References GetVehicleTunnelBridgeProc(), and HasVehicleOnPos().

Referenced by ClearPathReservation(), CmdBuildRoad(), CmdConvertRail(), and RemoveRoad().

void MarkSingleVehicleDirty | ( | const Vehicle * | v | ) |

Marks viewports dirty where the vehicle's image is In fact, it equals BeginVehicleMove(v); EndVehicleMove(v);.

Parameters:

  | v | vehicle to mark dirty

See also:
  BeginVehicleMove()
  EndVehicleMove()

Definition at line 1137 of file vehicle.cpp.

References MarkAllViewportsDirty().

Referenced by Vehicle::Crash(), InitializeDisasterVehicle(), and Vehicle::~Vehicle().

static void RunVehicleDayProc | ( |  | ) | `[static]`

Increases the day counter for all vehicles and calls 1-day and 32-day handlers.

Each tick, it processes vehicles with "index % DAY_TICKS == _date_fract", so each day, all vehicles are processes in DAY_TICKS steps.

Definition at line 653 of file vehicle.cpp.

References CALLBACK_FAILED, CBID_VEHICLE_32DAY_CALLBACK, Vehicle::day_counter, DAY_TICKS, Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tcache, Tzero >::PoolItem<&_vehicle_pool >::Get(), Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tcache, Tzero >::PoolItem<&_vehicle_pool >::GetPoolSize(), GetVehicleCallback(), HasBit(), and Vehicle::OnNewDay().

void ShowNewGrfVehicleError | ( | EngineID | engine,
|  | StringID | part1,
|  | StringID | part2,
|  | GRFBugs | bug_type,
|  | bool | critical |
| ) |  |  |

Displays a "NewGrf Bug" error message for a engine, and pauses the game if not networking.

Parameters:

  | engine | The engine that caused the problem
  | part1 | Part 1 of the error message, taking the grfname as parameter 1
  | part2 | Part 2 of the error message, taking the engine as parameter 2
  | bug_type | Flag to check and set in grfconfig
  | critical | Shall the "OpenTTD might crash"-message be shown when the player tries to unpause?

Definition at line 195 of file vehicle.cpp.

References _networking, CMD_PAUSE, DC_EXEC, DoCommand(), Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tcache, Tzero >::PoolItem<&_engine_pool >::Get(), GRFConfig::grf_bugs, HasBit(), lastof, GRFConfig::name, PM_PAUSED_ERROR, PM_PAUSED_NORMAL, SetBit(), SetDParam(), SetDParamStr(), and ShowErrorMessage().

Referenced by CheckConsistencyOfArticulatedVehicle(), and RailVehicleLengthChanged().

void VehicleEnteredDepotThisTick | ( | Vehicle * | v | ) |

Adds a vehicle to the list of vehicles, that visited a depot this tick.

Parameters:

  | *v | vehicle to add

Definition at line 635 of file vehicle.cpp.

References Vehicle::vehstatus.

VehicleEnterTileStatus VehicleEnterTile | ( | Vehicle * | v,
|  | TileIndex | tile,
|  | int | x,
|  | int | y |
| ) |  |  |

Call the tile callback function for a vehicle entering a tile.

Parameters:

  | v | Vehicle entering the tile
  | tile | Tile entered
  | x | X position
  | y | Y position

Returns:
  Some meta-data over the to be entered tile.

See also:
  VehicleEnterTileStatus to see what the bits in the return value mean.

Definition at line 1200 of file vehicle.cpp.

References _tile_type_procs, GetTileType(), and TileTypeProcs::vehicle_enter_tile_proc.

static Vehicle* VehicleFromPos | ( | TileIndex | tile,
|  | void * | data,
|  | VehicleFromPosProc * | proc,
|  | bool | find_first |
| ) |  |  | `[static]`

Helper function for FindVehicleOnPos/HasVehicleOnPos.

Note:
  Do not call this function directly!

Parameters:

  | tile | The location on the map
  | data | Arbitrary data passed to proc
  | proc | The proc that determines whether a vehicle will be "found".
  | find_first | Whether to return on the first found or iterate over all vehicles

Returns:
  the best matching or first vehicle (depending on find_first).

Definition at line 382 of file vehicle.cpp.

References GB(), Vehicle::tile, TileX(), and TileY().

Referenced by FindVehicleOnPos(), and HasVehicleOnPos().

static Vehicle* VehicleFromPosXY | ( | int | x,
|  | int | y,
|  | void * | data,
|  | VehicleFromPosProc * | proc,
|  | bool | find_first |
| ) |  |  | `[static]`

Helper function for FindVehicleOnPos/HasVehicleOnPos.

Note:
  Do not call this function directly!

Parameters:

  | x | The X location on the map
  | y | The Y location on the map
  | data | Arbitrary data passed to proc
  | proc | The proc that determines whether a vehicle will be "found".
  | find_first | Whether to return on the first found or iterate over all vehicles

Returns:
  the best matching or first vehicle (depending on find_first).

Definition at line 324 of file vehicle.cpp.

References GB(), and TILE_SIZE.

Referenced by FindVehicleOnPosXY(), and HasVehicleOnPosXY().

void VehicleMove | ( | Vehicle * | v,
|  | bool | update_viewport |
| ) |  |  |

Move a vehicle in the game state; that is moving it's position in the position hashes and marking it's location in the viewport dirty if requested.

Parameters:

  | v | vehicle to move
  | update_viewport | whether to dirty the viewport

Definition at line 1102 of file vehicle.cpp.

References Sprite::height, MarkAllViewportsDirty(), max(), min(), RemapCoords(), ST_NORMAL, Sprite::width, Sprite::x_offs, and Sprite::y_offs.

Referenced by AfterLoadVehicles(), CmdBuildAircraft(), CmdBuildRailVehicle(), CmdBuildRailWagon(), CmdBuildRoadVeh(), CmdBuildShip(), DisasterTick_Helicopter_Rotors(), InitializeDisasterVehicle(), and Vehicle::UpdateViewport().

byte VehicleRandomBits | ( |  | ) |

Get a value for a vehicle's random_bits.

Returns:
  A random value from 0 to 255.

Definition at line 276 of file vehicle.cpp.

References GB().

Referenced by CmdBuildAircraft(), CmdBuildRailVehicle(), CmdBuildRailWagon(), CmdBuildRoadVeh(), and CmdBuildShip().

## Variable Documentation

const byte _breakdown_chance[64]`[static]`

Initial value:

     {
        3,   3,   3,   3,   3,   3,   3,   3,
        4,   4,   5,   5,   6,   6,   7,   7,
        8,   8,   9,   9,  10,  10,  11,  11,
       12,  13,  13,  13,  13,  14,  15,  16,
       17,  19,  21,  25,  28,  31,  34,  37,
       40,  44,  48,  52,  56,  60,  64,  68,
       72,  80,  90, 100, 110, 120, 130, 140,
      150, 170, 190, 210, 230, 250, 250, 250,
    }

Definition at line 864 of file vehicle.cpp.

const Direction _new_direction_table[]`[static]`

Initial value:

     {
      DIR_N,  DIR_NW, DIR_W,
      DIR_NE, DIR_SE, DIR_SW,
      DIR_E,  DIR_SE, DIR_S
    }

Definition at line 1164 of file vehicle.cpp.