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85 lines
2.4 KiB
C
85 lines
2.4 KiB
C
#ifndef PBS_H
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#define PBS_H
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/** @file pbs.h Path-Based-Signalling header file
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* @see pbs.c */
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#include "vehicle.h"
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#include "map.h"
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#include "rail.h"
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/**
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* constants used for pbs_mode argument of npf-functions
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*/
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enum pbs_modes {
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PBS_MODE_NONE = 0, // no pbs
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PBS_MODE_GREEN = 1, // look for green exit signal from pbs block
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PBS_MODE_ANY = 2, // look for any exit signal from block
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};
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/**
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* constants used for v->u.rail.pbs_status
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*/
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enum PBSStatus {
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PBS_STAT_NONE = 0,
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PBS_STAT_HAS_PATH = 1,
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PBS_STAT_NEED_PATH = 2,
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};
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void PBSReserveTrack(TileIndex tile, Track track);
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/**<
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* Marks a track as reserved.
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* @param tile The tile of the track.
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* @param track The track to reserve, valid values 0-5.
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*/
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byte PBSTileReserved(TileIndex tile);
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/**<
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* Check which tracks are reserved on a tile.
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* @param tile The tile which you want to check.
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* @return The tracks reserved on that tile, each of the bits 0-5 is set when the corresponding track is reserved.
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*/
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uint16 PBSTileUnavail(TileIndex tile);
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/**<
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* Check which trackdirs are unavailable due to reserved tracks on a tile.
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* @param tile The tile which you want to check.
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* @return The tracks reserved on that tile, each of the bits 0-5,8-13 is set when the corresponding trackdir is unavailable.
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*/
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void PBSClearTrack(TileIndex tile, Track track);
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/**<
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* Unreserves a track.
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* @param tile The tile of the track.
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* @param track The track to unreserve, valid values 0-5.
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*/
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void PBSClearPath(TileIndex tile, Trackdir trackdir, TileIndex end_tile, Trackdir end_trackdir);
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/**<
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* Follows a planned(reserved) path, and unreserves the tracks.
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* @param tile The tile on which the path starts
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* @param trackdir The trackdirection in which the path starts
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* @param end_tile The tile on which the path ends
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* @param end_trackdir The trackdirection in which the path ends
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*/
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bool PBSIsPbsSignal(TileIndex tile, Trackdir trackdir);
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/**<
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* Checks if there are pbs signals on a track.
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* @param tile The tile you want to check
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* @param trackdir The trackdir you want to check
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* @return True when there are pbs signals on that tile
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*/
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bool PBSIsPbsSegment(uint tile, Trackdir trackdir);
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/**<
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* Checks if a signal/depot leads to a pbs block.
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* This means that the block needs to have at least 1 signal, and that all signals in it need to be pbs signals.
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* @param tile The tile to check
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* @param trackdir The direction in which to check
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* @return True when the depot is inside a pbs block
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*/
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#endif
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