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r12798:68ac0ef0475e
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(svn r17296) -Fix/feature [FS#3152]: allow rail wagons to be build when only el rail engines are available
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/*
* This file is part of OpenTTD.
* 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.
* 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.
* 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/>.
*/
/** @file yapf.h Entry point for OpenTTD to YAPF. */
#ifndef YAPF_H
#define YAPF_H
#include "../debug.h"
#include "../depot_type.h"
#include "../direction_type.h"
#include "../pbs.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(const 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(const 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')
* @param reserve_track indicates whether YAPF should try to reserve the found path
* @param target [out] the target tile of the reservation, free is set to true if path was reserved
* @return the best trackdir for next turn or INVALID_TRACKDIR if the path could not be found
*/
Trackdir YapfChooseRailTrack(const Vehicle *v, TileIndex tile, DiagDirection enterdir, TrackBits tracks, bool *path_not_found, bool reserve_track, PBSTileInfo *target);
/** 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(const 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(const Vehicle *v);
/**
* Try to extend the reserved path of a train to the nearest safe tile.
*
* @param v The train that needs to find a safe tile.
* @param tile Last tile of the current reserved path.
* @param td Last trackdir of the current reserved path.
* @param override_railtype Should all physically compabtible railtypes be searched, even if the vehicle can't on them on it own?
* @return True if the path could be extended to a safe tile.
*/
bool YapfRailFindNearestSafeTile(const Vehicle *v, TileIndex tile, Trackdir td, bool override_railtype);
/** 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;
/** Base tile length units */
enum {
YAPF_TILE_LENGTH = 100,
YAPF_TILE_CORNER_LENGTH = 71
};
#endif /* YAPF_H */
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