src/track_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 track_type.h All types related to tracks */
   9
  10 #ifndef TRACK_TYPE_H
  11 #define TRACK_TYPE_H
  12
  13 #include "core/enum_type.hpp"
  14
  15 /**
  16  * These are used to specify a single track.
  17  * Can be translated to a trackbit with TrackToTrackbit
  18  */
  19 enum Track : byte {
  20         TRACK_BEGIN = 0,        ///< Used for iterations
  21         TRACK_X     = 0,        ///< Track along the x-axis (north-east to south-west)
  22         TRACK_Y     = 1,        ///< Track along the y-axis (north-west to south-east)
  23         TRACK_UPPER = 2,        ///< Track in the upper corner of the tile (north)
  24         TRACK_LOWER = 3,        ///< Track in the lower corner of the tile (south)
  25         TRACK_LEFT  = 4,        ///< Track in the left corner of the tile (west)
  26         TRACK_RIGHT = 5,        ///< Track in the right corner of the tile (east)
  27         TRACK_END,              ///< Used for iterations
  28         INVALID_TRACK = 0xFF,   ///< Flag for an invalid track
  29 };
  30
  31 /** Allow incrementing of Track variables */
  32 DECLARE_POSTFIX_INCREMENT(Track)
  33
  34 /** Bitfield corresponding to Track */
  35 enum TrackBits : byte {
  36         TRACK_BIT_NONE    = 0U,                                                 ///< No track
  37         TRACK_BIT_X       = 1U << TRACK_X,                                      ///< X-axis track
  38         TRACK_BIT_Y       = 1U << TRACK_Y,                                      ///< Y-axis track
  39         TRACK_BIT_UPPER   = 1U << TRACK_UPPER,                                  ///< Upper track
  40         TRACK_BIT_LOWER   = 1U << TRACK_LOWER,                                  ///< Lower track
  41         TRACK_BIT_LEFT    = 1U << TRACK_LEFT,                                   ///< Left track
  42         TRACK_BIT_RIGHT   = 1U << TRACK_RIGHT,                                  ///< Right track
  43         TRACK_BIT_CROSS   = TRACK_BIT_X     | TRACK_BIT_Y,                      ///< X-Y-axis cross
  44         TRACK_BIT_HORZ    = TRACK_BIT_UPPER | TRACK_BIT_LOWER,                  ///< Upper and lower track
  45         TRACK_BIT_VERT    = TRACK_BIT_LEFT  | TRACK_BIT_RIGHT,                  ///< Left and right track
  46         TRACK_BIT_3WAY_NE = TRACK_BIT_X     | TRACK_BIT_UPPER | TRACK_BIT_RIGHT,///< "Arrow" to the north-east
  47         TRACK_BIT_3WAY_SE = TRACK_BIT_Y     | TRACK_BIT_LOWER | TRACK_BIT_RIGHT,///< "Arrow" to the south-east
  48         TRACK_BIT_3WAY_SW = TRACK_BIT_X     | TRACK_BIT_LOWER | TRACK_BIT_LEFT, ///< "Arrow" to the south-west
  49         TRACK_BIT_3WAY_NW = TRACK_BIT_Y     | TRACK_BIT_UPPER | TRACK_BIT_LEFT, ///< "Arrow" to the north-west
  50         TRACK_BIT_ALL     = TRACK_BIT_CROSS | TRACK_BIT_HORZ  | TRACK_BIT_VERT, ///< All possible tracks
  51         TRACK_BIT_MASK    = 0x3FU,                                              ///< Bitmask for the first 6 bits
  52         TRACK_BIT_WORMHOLE = 0x40U,                                             ///< Bitflag for a wormhole (used for tunnels)
  53         TRACK_BIT_DEPOT   = 0x80U,                                              ///< Bitflag for a depot
  54         INVALID_TRACK_BIT = 0xFF,                                               ///< Flag for an invalid trackbits value
  55 };
  56 DECLARE_ENUM_AS_BIT_SET(TrackBits)
  57
  58 /**
  59  * Enumeration for tracks and directions.
  60  *
  61  * These are a combination of tracks and directions. Values are 0-5 in one
  62  * direction (corresponding to the Track enum) and 8-13 in the other direction.
  63  * 6, 7, 14 and 15 are used to encode the reversing of road vehicles. Those
  64  * reversing track dirs are not considered to be 'valid' except in a small
  65  * corner in the road vehicle controller.
  66  */
  67 enum Trackdir : byte {
  68         TRACKDIR_BEGIN    =  0,         ///< Used for iterations
  69         TRACKDIR_X_NE     =  0,         ///< X-axis and direction to north-east
  70         TRACKDIR_Y_SE     =  1,         ///< Y-axis and direction to south-east
  71         TRACKDIR_UPPER_E  =  2,         ///< Upper track and direction to east
  72         TRACKDIR_LOWER_E  =  3,         ///< Lower track and direction to east
  73         TRACKDIR_LEFT_S   =  4,         ///< Left track and direction to south
  74         TRACKDIR_RIGHT_S  =  5,         ///< Right track and direction to south
  75         TRACKDIR_RVREV_NE =  6,         ///< (Road vehicle) reverse direction north-east
  76         TRACKDIR_RVREV_SE =  7,         ///< (Road vehicle) reverse direction south-east
  77         TRACKDIR_X_SW     =  8,         ///< X-axis and direction to south-west
  78         TRACKDIR_Y_NW     =  9,         ///< Y-axis and direction to north-west
  79         TRACKDIR_UPPER_W  = 10,         ///< Upper track and direction to west
  80         TRACKDIR_LOWER_W  = 11,         ///< Lower track and direction to west
  81         TRACKDIR_LEFT_N   = 12,         ///< Left track and direction to north
  82         TRACKDIR_RIGHT_N  = 13,         ///< Right track and direction to north
  83         TRACKDIR_RVREV_SW = 14,         ///< (Road vehicle) reverse direction south-west
  84         TRACKDIR_RVREV_NW = 15,         ///< (Road vehicle) reverse direction north-west
  85         TRACKDIR_END,                   ///< Used for iterations
  86         INVALID_TRACKDIR  = 0xFF,       ///< Flag for an invalid trackdir
  87 };
  88
  89 /** Allow incrementing of Trackdir variables */
  90 DECLARE_POSTFIX_INCREMENT(Trackdir)
  91
  92 /**
  93  * Enumeration of bitmasks for the TrackDirs
  94  *
  95  * These are a combination of tracks and directions. Values are 0-5 in one
  96  * direction (corresponding to the Track enum) and 8-13 in the other direction.
  97  */
  98 enum TrackdirBits : uint16_t {
  99         TRACKDIR_BIT_NONE     = 0U,                     ///< No track build
 100         TRACKDIR_BIT_X_NE     = 1U << TRACKDIR_X_NE,    ///< Track x-axis, direction north-east
 101         TRACKDIR_BIT_Y_SE     = 1U << TRACKDIR_Y_SE,    ///< Track y-axis, direction south-east
 102         TRACKDIR_BIT_UPPER_E  = 1U << TRACKDIR_UPPER_E, ///< Track upper, direction east
 103         TRACKDIR_BIT_LOWER_E  = 1U << TRACKDIR_LOWER_E, ///< Track lower, direction east
 104         TRACKDIR_BIT_LEFT_S   = 1U << TRACKDIR_LEFT_S,  ///< Track left, direction south
 105         TRACKDIR_BIT_RIGHT_S  = 1U << TRACKDIR_RIGHT_S, ///< Track right, direction south
 106         /* Again, note the two missing values here. This enables trackdir -> track conversion by doing (trackdir & 0xFF) */
 107         TRACKDIR_BIT_X_SW     = 1U << TRACKDIR_X_SW,    ///< Track x-axis, direction south-west
 108         TRACKDIR_BIT_Y_NW     = 1U << TRACKDIR_Y_NW,    ///< Track y-axis, direction north-west
 109         TRACKDIR_BIT_UPPER_W  = 1U << TRACKDIR_UPPER_W, ///< Track upper, direction west
 110         TRACKDIR_BIT_LOWER_W  = 1U << TRACKDIR_LOWER_W, ///< Track lower, direction west
 111         TRACKDIR_BIT_LEFT_N   = 1U << TRACKDIR_LEFT_N,  ///< Track left, direction north
 112         TRACKDIR_BIT_RIGHT_N  = 1U << TRACKDIR_RIGHT_N, ///< Track right, direction north
 113         TRACKDIR_BIT_MASK     = 0x3F3F,                 ///< Bitmask for bit-operations
 114         INVALID_TRACKDIR_BIT  = 0xFFFF,                 ///< Flag for an invalid trackdirbit value
 115 };
 116 DECLARE_ENUM_AS_BIT_SET(TrackdirBits)
 117
 118 typedef uint32_t TrackStatus;
 119
 120 #endif /* TRACK_TYPE_H */