signal_func.h

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00001 /* $Id: signal_func.h 17248 2009-08-21 20:21:05Z rubidium $ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * 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.
00006  * 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.
00007  * 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/>.
00008  */
00009 
00012 #ifndef SIGNAL_FUNC_H
00013 #define SIGNAL_FUNC_H
00014 
00015 #include "track_type.h"
00016 #include "tile_type.h"
00017 #include "direction_type.h"
00018 #include "company_type.h"
00019 
00024 static inline byte SignalAlongTrackdir(Trackdir trackdir)
00025 {
00026   extern const byte _signal_along_trackdir[TRACKDIR_END];
00027   return _signal_along_trackdir[trackdir];
00028 }
00029 
00034 static inline byte SignalAgainstTrackdir(Trackdir trackdir)
00035 {
00036   extern const byte _signal_against_trackdir[TRACKDIR_END];
00037   return _signal_against_trackdir[trackdir];
00038 }
00039 
00044 static inline byte SignalOnTrack(Track track)
00045 {
00046   extern const byte _signal_on_track[TRACK_END];
00047   return _signal_on_track[track];
00048 }
00049 
00051 enum SigSegState {
00052   SIGSEG_FREE,    
00053   SIGSEG_FULL,    
00054   SIGSEG_PBS,     
00055 };
00056 
00057 SigSegState UpdateSignalsOnSegment(TileIndex tile, DiagDirection side, Owner owner);
00058 void SetSignalsOnBothDir(TileIndex tile, Track track, Owner owner);
00059 void AddTrackToSignalBuffer(TileIndex tile, Track track, Owner owner);
00060 void AddSideToSignalBuffer(TileIndex tile, DiagDirection side, Owner owner);
00061 void UpdateSignalsInBuffer();
00062 
00063 #endif /* SIGNAL_FUNC_H */

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