# yapf.h File Reference

Entry point for OpenTTD to YAPF. More...

`#include "../../direction_type.h"`
`#include "../../station_type.h"`
`#include "../pathfinder_type.h"`

Go to the source code of this file.

## Functions
Track | YapfShipChooseTrack (const Ship *v, TileIndex tile, DiagDirection enterdir, TrackBits tracks)
| Finds the best path for given ship using YAPF.
Trackdir | YapfRoadVehicleChooseTrack (const RoadVehicle *v, TileIndex tile, DiagDirection enterdir, TrackdirBits trackdirs)
| Finds the best path for given road vehicle using YAPF.
Track | YapfTrainChooseTrack (const Train *v, TileIndex tile, DiagDirection enterdir, TrackBits tracks, bool *path_not_found, bool reserve_track, struct PBSTileInfo *target)
| Finds the best path for given train using YAPF.
FindDepotData | YapfRoadVehicleFindNearestDepot (const RoadVehicle *v, int max_penalty)
| Used when user sends road vehicle to the nearest depot or if road vehicle needs servicing using YAPF.
FindDepotData | YapfTrainFindNearestDepot (const Train *v, int max_distance)
| Used when user sends train to the nearest depot or if train needs servicing using YAPF.
bool | YapfTrainCheckReverse (const Train *v)
| Returns true if it is better to reverse the train before leaving station using YAPF.
bool | YapfTrainFindNearestSafeTile (const Train *v, TileIndex tile, Trackdir td, bool override_railtype)
| Try to extend the reserved path of a train to the nearest safe tile using YAPF.

## Detailed Description

Entry point for OpenTTD to YAPF.

Definition in file yapf.h.

## Function Documentation

Trackdir YapfRoadVehicleChooseTrack | ( | const RoadVehicle * | v,
|  | TileIndex | tile,
|  | DiagDirection | enterdir,
|  | TrackdirBits | trackdirs |
| ) |  |  |

Finds the best path for given road vehicle using YAPF.

Parameters:

  | v | the RV that needs to find a path
  | tile | the tile to find the path from (should be next tile the RV is about to enter)
  | enterdir | diagonal direction which the RV will enter this new tile from
  | trackdirs | available trackdirs on the new tile (to choose from)

Returns:
  the best trackdir for next turn or INVALID_TRACKDIR if the path could not be found

Definition at line 465 of file yapf_road.cpp.

References _settings_game, YAPFSettings::disable_node_optimization, FindFirstBit2x64(), INVALID_TRACKDIR, GameSettings::pf, and PathfinderSettings::yapf.

Referenced by RoadFindPathToDest().

FindDepotData YapfRoadVehicleFindNearestDepot | ( | const RoadVehicle * | v,
|  | int | max_penalty |
| ) |  |  |

Used when user sends road vehicle to the nearest depot or if road vehicle needs servicing using YAPF.

Parameters:

  | v | vehicle that needs to go to some depot
  | max_penalty | max distance (in pathfinder penalty) from the current vehicle position (used also as optimization - the pathfinder can stop path finding if max_penalty was reached and no depot was seen)

Returns:
  the data about the depot

Definition at line 480 of file yapf_road.cpp.

References _settings_game, FindDepotData::best_length, RoadVehicle::compatible_roadtypes, YAPFSettings::disable_node_optimization, GetTileTrackStatus(), RoadVehicle::GetVehicleTrackdir(), GameSettings::pf, FindDepotData::tile, TrackdirToTrackdirBits(), TrackStatusToTrackdirBits(), TRANSPORT_ROAD, and PathfinderSettings::yapf.

Track YapfShipChooseTrack | ( | const Ship * | v,
|  | TileIndex | tile,
|  | DiagDirection | enterdir,
|  | TrackBits | tracks |
| ) |  |  |

Finds the best path for given ship using YAPF.

Parameters:

  | v | the ship that needs to find a path
  | tile | the tile to find the path from (should be next tile the ship is about to enter)
  | enterdir | diagonal direction which the ship will enter this new tile from
  | tracks | available tracks on the new tile (to choose from)

Returns:
  the best trackdir for next turn or INVALID_TRACK if the path could not be found

Definition at line 172 of file yapf_ship.cpp.

References _settings_game, ChooseShipTrack(), YAPFSettings::disable_node_optimization, PathfinderSettings::forbid_90_deg, INVALID_TRACK, INVALID_TRACKDIR, GameSettings::pf, TrackdirToTrack(), and PathfinderSettings::yapf.

Referenced by ChooseShipTrack().

bool YapfTrainCheckReverse | ( | const Train * | v | ) |

Returns true if it is better to reverse the train before leaving station using YAPF.

Parameters:

  | v | the train leaving the station

Returns:
  true if reversing is better

Definition at line 544 of file yapf_rail.cpp.

References _settings_game, DistanceManhattan(), PathfinderSettings::forbid_90_deg, GetOtherTunnelBridgeEnd(), GetTunnelBridgeDirection(), Train::GetVehicleTrackdir(), SpecializedVehicle< T, Type >::Last(), GameSettings::pf, ReverseTrackdir(), Train::track, TRACK_BIT_WORMHOLE, TrackdirToExitdir(), and YAPF_TILE_LENGTH.

Track YapfTrainChooseTrack | ( | const Train * | v,
|  | TileIndex | tile,
|  | DiagDirection | enterdir,
|  | TrackBits | tracks,
|  | bool * | path_not_found,
|  | bool | reserve_track,
|  | struct PBSTileInfo * | target |
| ) |  |  |

Finds the best path for given train using YAPF.

Parameters:

  | v | the train that needs to find a path
  | tile | the tile to find the path from (should be next tile the train is about to enter)
  | enterdir | diagonal direction which the RV will enter this new tile from
  | tracks | available trackdirs on the new tile (to choose from)
  | path_not_found | [out] true is returned if no path can be found (returned Trackdir is only a 'guess')
  | reserve_track | indicates whether YAPF should try to reserve the found path
  | target | [out] the target tile of the reservation, free is set to true if path was reserved

Returns:
  the best track for next turn

Definition at line 529 of file yapf_rail.cpp.

References _settings_game, FindFirstTrack(), PathfinderSettings::forbid_90_deg, INVALID_TRACKDIR, GameSettings::pf, and TrackdirToTrack().

Referenced by DoTrainPathfind().

FindDepotData YapfTrainFindNearestDepot | ( | const Train * | v,
|  | int | max_distance |
| ) |  |  |

Used when user sends train to the nearest depot or if train needs servicing using YAPF.

Parameters:

  | v | train that needs to go to some depot
  | max_penalty | max distance (int pathfinder penalty) from the current train position (used also as optimization - the pathfinder can stop path finding if max_penalty was reached and no depot was seen)

Returns:
  the data about the depot

Definition at line 603 of file yapf_rail.cpp.

References _settings_game, FindDepotData::best_length, FollowTrainReservation(), PathfinderSettings::forbid_90_deg, Train::GetVehicleTrackdir(), SpecializedVehicle< T, Type >::Last(), GameSettings::pf, FindDepotData::reverse, ReverseTrackdir(), FindDepotData::tile, PBSTileInfo::tile, PBSTileInfo::trackdir, and YAPF_INFINITE_PENALTY.

Referenced by FindClosestTrainDepot().

bool YapfTrainFindNearestSafeTile | ( | const Train * | v,
|  | TileIndex | tile,
|  | Trackdir | td,
|  | bool | override_railtype |
| ) |  |  |

Try to extend the reserved path of a train to the nearest safe tile using YAPF.

Parameters:

  | v | The train that needs to find a safe tile.
  | tile | Last tile of the current reserved path.
  | td | Last trackdir of the current reserved path.
  | override_railtype | Should all physically compatible railtypes be searched, even if the vehicle can't run on them on its own?

Returns:
  True if the path could be extended to a safe tile.

Definition at line 626 of file yapf_rail.cpp.

References _settings_game, PathfinderSettings::forbid_90_deg, and GameSettings::pf.

Referenced by TryReserveSafeTrack().