mirror of https://github.com/OpenTTD/OpenTTD.git
121 lines
5.8 KiB
C
121 lines
5.8 KiB
C
/* $Id$ */
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#ifndef YAPF_H
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#define YAPF_H
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#include "../debug.h"
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/** Finds the best path for given ship.
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* @param v the ship that needs to find a path
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* @param tile the tile to find the path from (should be next tile the ship is about to enter)
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* @param enterdir diagonal direction which the ship will enter this new tile from
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* @param tracks available tracks on the new tile (to choose from)
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* @return the best trackdir for next turn or INVALID_TRACKDIR if the path could not be found
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*/
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Trackdir YapfChooseShipTrack(Vehicle *v, TileIndex tile, DiagDirection enterdir, TrackBits tracks);
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/** Finds the best path for given road vehicle.
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* @param v the RV that needs to find a path
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* @param tile the tile to find the path from (should be next tile the RV is about to enter)
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* @param enterdir diagonal direction which the RV will enter this new tile from
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* @param tracks available tracks on the new tile (to choose from)
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* @return the best trackdir for next turn or INVALID_TRACKDIR if the path could not be found
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*/
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Trackdir YapfChooseRoadTrack(Vehicle *v, TileIndex tile, DiagDirection enterdir);
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/** Finds the best path for given train.
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* @param v the train that needs to find a path
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* @param tile the tile to find the path from (should be next tile the train is about to enter)
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* @param enterdir diagonal direction which the RV will enter this new tile from
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* @param trackdirs available trackdirs on the new tile (to choose from)
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* @param no_path_found [out] true is returned if no path can be found (returned Trackdir is only a 'guess')
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* @return the best trackdir for next turn or INVALID_TRACKDIR if the path could not be found
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*/
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Trackdir YapfChooseRailTrack(Vehicle *v, TileIndex tile, DiagDirection enterdir, TrackdirBits trackdirs, bool *path_not_found);
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/** Used by RV multistop feature to find the nearest road stop that has a free slot.
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* @param v RV (its current tile will be the origin)
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* @param tile destination tile
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* @return distance from origin tile to the destination (number of road tiles) or UINT_MAX if path not found
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*/
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uint YapfRoadVehDistanceToTile(const Vehicle* v, TileIndex tile);
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/** Used when user sends RV to the nearest depot or if RV needs servicing.
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* Returns the nearest depot (or NULL if depot was not found).
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*/
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Depot* YapfFindNearestRoadDepot(const Vehicle *v);
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/** Used when user sends train to the nearest depot or if train needs servicing.
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* @v train that needs to go to some depot
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* @max_distance max distance (number of track tiles) from the current train position
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* (used also as optimization - the pathfinder can stop path finding if max_distance
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* was reached and no depot was seen)
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* @reverse_penalty penalty that should be added for the path that requires reversing the train first
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* @depot_tile receives the depot tile if depot was found
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* @reversed receives true if train needs to reversed first
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* @return the true if depot was found.
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*/
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bool YapfFindNearestRailDepotTwoWay(Vehicle *v, int max_distance, int reverse_penalty, TileIndex* depot_tile, bool* reversed);
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/** Returns true if it is better to reverse the train before leaving station */
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bool YapfCheckReverseTrain(Vehicle* v);
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/** Use this function to notify YAPF that track layout (or signal configuration) has change */
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void YapfNotifyTrackLayoutChange(TileIndex tile, Track track);
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/** performance measurement helpers */
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void* NpfBeginInterval(void);
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int NpfEndInterval(void* perf);
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extern int _aystar_stats_open_size;
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extern int _aystar_stats_closed_size;
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/** Track followers. They should help whenever any new code will need to walk through
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* tracks, road or water tiles (pathfinders, signal controllers, vehicle controllers).
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* It is an attempt to introduce API that should simplify tasks listed above.
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* If you will need to use it:
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* 1. allocate/declare FollowTrack_t structure;
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* 2. call FollowTrackInit() and provide vehicle (if relevant)
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* 3. call one of 6 FollowTrackXxxx() APIs below
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* 4. check return value (if true then continue else stop)
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* 5. look at FollowTrack_t structure for the result
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* 6. optionally repeat steps 3..5
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* 7. in case of troubles contact KUDr
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*/
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/** Base struct for track followers. */
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typedef struct FollowTrack_t
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{
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const Vehicle* m_veh; ///< moving vehicle
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TileIndex m_old_tile; ///< the origin (vehicle moved from) before move
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Trackdir m_old_td; ///< the trackdir (the vehicle was on) before move
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TileIndex m_new_tile; ///< the new tile (the vehicle has entered)
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TrackdirBits m_new_td_bits; ///< the new set of available trackdirs
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DiagDirection m_exitdir; ///< exit direction (leaving the old tile)
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bool m_is_tunnel; ///< last turn passed tunnel
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bool m_is_bridge; ///< last turn passed bridge ramp
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bool m_is_station; ///< last turn passed station
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int m_tiles_skipped; ///< number of skipped tunnel or station tiles
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} FollowTrack_t;
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/** Initializes FollowTrack_t structure */
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void FollowTrackInit(FollowTrack_t *This, const Vehicle* v);
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/** Main track follower routines */
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bool FollowTrackWater (FollowTrack_t *This, TileIndex old_tile, Trackdir old_td);
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bool FollowTrackRoad (FollowTrack_t *This, TileIndex old_tile, Trackdir old_td);
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bool FollowTrackRail (FollowTrack_t *This, TileIndex old_tile, Trackdir old_td);
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bool FollowTrackWaterNo90(FollowTrack_t *This, TileIndex old_tile, Trackdir old_td);
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bool FollowTrackRoadNo90 (FollowTrack_t *This, TileIndex old_tile, Trackdir old_td);
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bool FollowTrackRailNo90 (FollowTrack_t *This, TileIndex old_tile, Trackdir old_td);
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/** Base tile length units */
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enum {
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YAPF_TILE_LENGTH = 100,
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YAPF_TILE_CORNER_LENGTH = 71
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};
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#endif /* YAPF_H */
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