mirror of https://github.com/OpenTTD/OpenTTD.git
62 lines
2.1 KiB
C
62 lines
2.1 KiB
C
/*
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* This file is part of OpenTTD.
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* 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.
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* 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.
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* 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/>.
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*/
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/** @file signal_func.h Functions related to signals. */
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#ifndef SIGNAL_FUNC_H
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#define SIGNAL_FUNC_H
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#include "track_type.h"
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#include "tile_type.h"
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#include "direction_type.h"
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#include "company_type.h"
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/**
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* Maps a trackdir to the bit that stores its status in the map arrays, in the
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* direction along with the trackdir.
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*/
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inline uint8_t SignalAlongTrackdir(Trackdir trackdir)
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{
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extern const uint8_t _signal_along_trackdir[TRACKDIR_END];
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return _signal_along_trackdir[trackdir];
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}
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/**
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* Maps a trackdir to the bit that stores its status in the map arrays, in the
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* direction against the trackdir.
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*/
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inline uint8_t SignalAgainstTrackdir(Trackdir trackdir)
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{
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extern const uint8_t _signal_against_trackdir[TRACKDIR_END];
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return _signal_against_trackdir[trackdir];
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}
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/**
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* Maps a Track to the bits that store the status of the two signals that can
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* be present on the given track.
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*/
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inline uint8_t SignalOnTrack(Track track)
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{
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extern const uint8_t _signal_on_track[TRACK_END];
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return _signal_on_track[track];
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}
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/** State of the signal segment */
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enum SigSegState {
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SIGSEG_FREE, ///< Free and has no pre-signal exits or at least one green exit
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SIGSEG_FULL, ///< Occupied by a train
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SIGSEG_PBS, ///< Segment is a PBS segment
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};
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SigSegState UpdateSignalsOnSegment(TileIndex tile, DiagDirection side, Owner owner);
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void SetSignalsOnBothDir(TileIndex tile, Track track, Owner owner);
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void AddTrackToSignalBuffer(TileIndex tile, Track track, Owner owner);
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void AddSideToSignalBuffer(TileIndex tile, DiagDirection side, Owner owner);
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void UpdateSignalsInBuffer();
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#endif /* SIGNAL_FUNC_H */
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