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(svn r12105) -Codechange: Use TransportType instead of guessing what kind of bridge we are preparing to build
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/** @file yapf.h */
#ifndef YAPF_H
#define YAPF_H
#include "../debug.h"
/** Finds the best path for given ship.
* @param v the ship that needs to find a path
* @param tile the tile to find the path from (should be next tile the ship is about to enter)
* @param enterdir diagonal direction which the ship will enter this new tile from
* @param tracks available tracks on the new tile (to choose from)
* @return the best trackdir for next turn or INVALID_TRACKDIR if the path could not be found
*/
Trackdir YapfChooseShipTrack(Vehicle *v, TileIndex tile, DiagDirection enterdir, TrackBits tracks);
/** Finds the best path for given road vehicle.
* @param v the RV that needs to find a path
* @param tile the tile to find the path from (should be next tile the RV is about to enter)
* @param enterdir diagonal direction which the RV will enter this new tile from
* @return the best trackdir for next turn or INVALID_TRACKDIR if the path could not be found
*/
Trackdir YapfChooseRoadTrack(Vehicle *v, TileIndex tile, DiagDirection enterdir);
/** Finds the best path for given train.
* @param v the train that needs to find a path
* @param tile the tile to find the path from (should be next tile the train is about to enter)
* @param enterdir diagonal direction which the RV will enter this new tile from
* @param tracks available trackdirs on the new tile (to choose from)
* @param path_not_found [out] true is returned if no path can be found (returned Trackdir is only a 'guess')
* @return the best trackdir for next turn or INVALID_TRACKDIR if the path could not be found
*/
Trackdir YapfChooseRailTrack(Vehicle *v, TileIndex tile, DiagDirection enterdir, TrackBits tracks, bool *path_not_found);
/** Used by RV multistop feature to find the nearest road stop that has a free slot.
* @param v RV (its current tile will be the origin)
* @param tile destination tile
* @return distance from origin tile to the destination (number of road tiles) or UINT_MAX if path not found
*/
uint YapfRoadVehDistanceToTile(const Vehicle* v, TileIndex tile);
/** Used when user sends RV to the nearest depot or if RV needs servicing.
* Returns the nearest depot (or NULL if depot was not found).
*/
Depot* YapfFindNearestRoadDepot(const Vehicle *v);
/** Used when user sends train to the nearest depot or if train needs servicing.
* @param v train that needs to go to some depot
* @param max_distance max distance (number of track tiles) from the current train position
* (used also as optimization - the pathfinder can stop path finding if max_distance
* was reached and no depot was seen)
* @param reverse_penalty penalty that should be added for the path that requires reversing the train first
* @param depot_tile receives the depot tile if depot was found
* @param reversed receives true if train needs to reversed first
* @return the true if depot was found.
*/
bool YapfFindNearestRailDepotTwoWay(Vehicle *v, int max_distance, int reverse_penalty, TileIndex* depot_tile, bool* reversed);
/** Returns true if it is better to reverse the train before leaving station */
bool YapfCheckReverseTrain(Vehicle* v);
/** Use this function to notify YAPF that track layout (or signal configuration) has change */
void YapfNotifyTrackLayoutChange(TileIndex tile, Track track);
/** performance measurement helpers */
void* NpfBeginInterval();
int NpfEndInterval(void* perf);
extern int _aystar_stats_open_size;
extern int _aystar_stats_closed_size;
/** Track followers. They should help whenever any new code will need to walk through
* tracks, road or water tiles (pathfinders, signal controllers, vehicle controllers).
* It is an attempt to introduce API that should simplify tasks listed above.
* If you will need to use it:
* 1. allocate/declare FollowTrack_t structure;
* 2. call FollowTrackInit() and provide vehicle (if relevant)
* 3. call one of 6 FollowTrackXxxx() APIs below
* 4. check return value (if true then continue else stop)
* 5. look at FollowTrack_t structure for the result
* 6. optionally repeat steps 3..5
* 7. in case of troubles contact KUDr
*/
/** Base struct for track followers. */
struct FollowTrack_t
{
enum ErrorCode {
EC_NONE,
EC_OWNER,
EC_RAIL_TYPE,
EC_90DEG,
EC_NO_WAY,
};
const Vehicle* m_veh; ///< moving vehicle
TileIndex m_old_tile; ///< the origin (vehicle moved from) before move
Trackdir m_old_td; ///< the trackdir (the vehicle was on) before move
TileIndex m_new_tile; ///< the new tile (the vehicle has entered)
TrackdirBits m_new_td_bits; ///< the new set of available trackdirs
DiagDirection m_exitdir; ///< exit direction (leaving the old tile)
bool m_is_tunnel; ///< last turn passed tunnel
bool m_is_bridge; ///< last turn passed bridge ramp
bool m_is_station; ///< last turn passed station
int m_tiles_skipped; ///< number of skipped tunnel or station tiles
ErrorCode m_err;
};
/** Initializes FollowTrack_t structure */
void FollowTrackInit(FollowTrack_t *This, const Vehicle* v);
/** Main track follower routines */
bool FollowTrackWater (FollowTrack_t *This, TileIndex old_tile, Trackdir old_td);
bool FollowTrackRoad (FollowTrack_t *This, TileIndex old_tile, Trackdir old_td);
bool FollowTrackRail (FollowTrack_t *This, TileIndex old_tile, Trackdir old_td);
bool FollowTrackWaterNo90(FollowTrack_t *This, TileIndex old_tile, Trackdir old_td);
bool FollowTrackRoadNo90 (FollowTrack_t *This, TileIndex old_tile, Trackdir old_td);
bool FollowTrackRailNo90 (FollowTrack_t *This, TileIndex old_tile, Trackdir old_td);
/** Base tile length units */
enum {
YAPF_TILE_LENGTH = 100,
YAPF_TILE_CORNER_LENGTH = 71
};
#endif /* YAPF_H */
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