src/signal_type.h

   1 /*
   2  * This file is part of OpenTTD.
   3  * 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.
   4  * 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.
   5  * 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/>.
   6  */
   7
   8 /** @file signal_type.h Types and classes related to signals. */
   9
  10 #ifndef SIGNAL_TYPE_H
  11 #define SIGNAL_TYPE_H
  12
  13 #include "core/enum_type.hpp"
  14
  15 /** Variant of the signal, i.e. how does the signal look? */
  16 enum SignalVariant : byte {
  17         SIG_ELECTRIC  = 0, ///< Light signal
  18         SIG_SEMAPHORE = 1, ///< Old-fashioned semaphore signal
  19 };
  20
  21
  22 /** Type of signal, i.e. how does the signal behave? */
  23 enum SignalType : byte {
  24         SIGTYPE_BLOCK      = 0, ///< block signal
  25         SIGTYPE_ENTRY      = 1, ///< presignal block entry
  26         SIGTYPE_EXIT       = 2, ///< presignal block exit
  27         SIGTYPE_COMBO      = 3, ///< presignal inter-block
  28         SIGTYPE_PBS        = 4, ///< normal pbs signal
  29         SIGTYPE_PBS_ONEWAY = 5, ///< no-entry signal
  30
  31         SIGTYPE_END,
  32         SIGTYPE_LAST       = SIGTYPE_PBS_ONEWAY,
  33         SIGTYPE_LAST_NOPBS = SIGTYPE_COMBO,
  34 };
  35 DECLARE_ENUM_AS_ADDABLE(SignalType)
  36
  37 /**
  38  * These are states in which a signal can be. Currently these are only two, so
  39  * simple boolean logic will do. But do try to compare to this enum instead of
  40  * normal boolean evaluation, since that will make future additions easier.
  41  */
  42 enum SignalState {
  43         SIGNAL_STATE_RED   = 0, ///< The signal is red
  44         SIGNAL_STATE_GREEN = 1, ///< The signal is green
  45 };
  46
  47 #endif /* SIGNAL_TYPE_H */