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