mirror of https://github.com/OpenTTD/OpenTTD.git
(svn r11662) -Codechange: move some rail types/related functions around.
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src/rail.h
625
src/rail.h
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@ -6,200 +6,11 @@
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#define RAIL_H
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#include "gfx.h"
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#include "direction_func.h"
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#include "rail_type.h"
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#include "track_type.h"
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#include "tile.h"
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#include "variables.h"
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/**
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* Enumeration for all possible railtypes.
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*
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* This enumeration defines all 4 possible railtypes.
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*/
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enum RailType {
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RAILTYPE_BEGIN = 0, ///< Used for iterations
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RAILTYPE_RAIL = 0, ///< Standard non-electric rails
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RAILTYPE_ELECTRIC = 1, ///< Electric rails
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RAILTYPE_MONO = 2, ///< Monorail
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RAILTYPE_MAGLEV = 3, ///< Maglev
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RAILTYPE_END, ///< Used for iterations
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INVALID_RAILTYPE = 0xFF ///< Flag for invalid railtype
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};
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typedef byte RailTypeMask;
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/** Allow incrementing of Track variables */
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DECLARE_POSTFIX_INCREMENT(RailType);
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/** Define basic enum properties */
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template <> struct EnumPropsT<RailType> : MakeEnumPropsT<RailType, byte, RAILTYPE_BEGIN, RAILTYPE_END, INVALID_RAILTYPE> {};
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typedef TinyEnumT<RailType> RailTypeByte;
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/**
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* These are used to specify a single track.
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* Can be translated to a trackbit with TrackToTrackbit
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*/
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enum Track {
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TRACK_BEGIN = 0, ///< Used for iterations
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TRACK_X = 0, ///< Track along the x-axis (north-east to south-west)
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TRACK_Y = 1, ///< Track along the y-axis (north-west to south-east)
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TRACK_UPPER = 2, ///< Track in the upper corner of the tile (north)
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TRACK_LOWER = 3, ///< Track in the lower corner of the tile (south)
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TRACK_LEFT = 4, ///< Track in the left corner of the tile (west)
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TRACK_RIGHT = 5, ///< Track in the right corner of the tile (east)
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TRACK_END, ///< Used for iterations
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INVALID_TRACK = 0xFF ///< Flag for an invalid track
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};
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/** Allow incrementing of Track variables */
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DECLARE_POSTFIX_INCREMENT(Track);
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/** Define basic enum properties */
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template <> struct EnumPropsT<Track> : MakeEnumPropsT<Track, byte, TRACK_BEGIN, TRACK_END, INVALID_TRACK> {};
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typedef TinyEnumT<Track> TrackByte;
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/**
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* Convert an Axis to the corresponding Track
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* AXIS_X -> TRACK_X
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* AXIS_Y -> TRACK_Y
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* Uses the fact that they share the same internal encoding
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*
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* @param a the axis to convert
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* @return the track corresponding to the axis
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*/
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static inline Track AxisToTrack(Axis a)
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{
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return (Track)a;
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}
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/** Bitfield corresponding to Track */
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enum TrackBits {
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TRACK_BIT_NONE = 0U, ///< No track
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TRACK_BIT_X = 1U << TRACK_X, ///< X-axis track
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TRACK_BIT_Y = 1U << TRACK_Y, ///< Y-axis track
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TRACK_BIT_UPPER = 1U << TRACK_UPPER, ///< Upper track
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TRACK_BIT_LOWER = 1U << TRACK_LOWER, ///< Lower track
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TRACK_BIT_LEFT = 1U << TRACK_LEFT, ///< Left track
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TRACK_BIT_RIGHT = 1U << TRACK_RIGHT, ///< Right track
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TRACK_BIT_CROSS = TRACK_BIT_X | TRACK_BIT_Y, ///< X-Y-axis cross
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TRACK_BIT_HORZ = TRACK_BIT_UPPER | TRACK_BIT_LOWER, ///< Upper and lower track
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TRACK_BIT_VERT = TRACK_BIT_LEFT | TRACK_BIT_RIGHT, ///< Left and right track
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TRACK_BIT_3WAY_NE = TRACK_BIT_X | TRACK_BIT_UPPER | TRACK_BIT_RIGHT,///< "Arrow" to the north-east
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TRACK_BIT_3WAY_SE = TRACK_BIT_Y | TRACK_BIT_LOWER | TRACK_BIT_RIGHT,///< "Arrow" to the south-east
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TRACK_BIT_3WAY_SW = TRACK_BIT_X | TRACK_BIT_LOWER | TRACK_BIT_LEFT, ///< "Arrow" to the south-west
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TRACK_BIT_3WAY_NW = TRACK_BIT_Y | TRACK_BIT_UPPER | TRACK_BIT_LEFT, ///< "Arrow" to the north-west
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TRACK_BIT_ALL = TRACK_BIT_CROSS | TRACK_BIT_HORZ | TRACK_BIT_VERT, ///< All possible tracks
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TRACK_BIT_MASK = 0x3FU, ///< Bitmask for the first 6 bits
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TRACK_BIT_WORMHOLE = 0x40U, ///< Bitflag for a wormhole (used for tunnels)
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TRACK_BIT_DEPOT = 0x80U, ///< Bitflag for a depot
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INVALID_TRACK_BIT = 0xFF ///< Flag for an invalid trackbits value
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};
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/** Define basic enum properties */
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template <> struct EnumPropsT<TrackBits> : MakeEnumPropsT<TrackBits, byte, TRACK_BIT_NONE, TRACK_BIT_ALL, INVALID_TRACK_BIT> {};
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typedef TinyEnumT<TrackBits> TrackBitsByte;
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DECLARE_ENUM_AS_BIT_SET(TrackBits);
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/**
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* Maps a Track to the corresponding TrackBits value
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* @param track the track to convert
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* @return the converted TrackBits value of the track
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*/
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static inline TrackBits TrackToTrackBits(Track track)
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{
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return (TrackBits)(1 << track);
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}
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/**
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* Maps an Axis to the corresponding TrackBits value
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* @param a the axis to convert
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* @return the converted TrackBits value of the axis
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*/
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static inline TrackBits AxisToTrackBits(Axis a)
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{
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return TrackToTrackBits(AxisToTrack(a));
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}
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/**
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* Returns a single horizontal/vertical trackbit, that is in a specific tile corner.
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*
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* @param corner The corner of a tile.
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* @return The TrackBits of the track in the corner.
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*/
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static inline TrackBits CornerToTrackBits(Corner corner)
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{
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extern const TrackBits _corner_to_trackbits[];
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assert(IsValidCorner(corner));
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return _corner_to_trackbits[corner];
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}
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/**
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* Enumeration for tracks and directions.
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*
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* These are a combination of tracks and directions. Values are 0-5 in one
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* direction (corresponding to the Track enum) and 8-13 in the other direction.
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* 6, 7, 14 and 15 are used to encode the reversing of road vehicles. Those
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* reversing track dirs are not considered to be 'valid' except in a small
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* corner in the road vehicle controller.
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*/
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enum Trackdir {
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TRACKDIR_BEGIN = 0, ///< Used for iterations
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TRACKDIR_X_NE = 0, ///< X-axis and direction to north-east
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TRACKDIR_Y_SE = 1, ///< Y-axis and direction to south-east
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TRACKDIR_UPPER_E = 2, ///< Upper track and direction to east
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TRACKDIR_LOWER_E = 3, ///< Lower track and direction to east
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TRACKDIR_LEFT_S = 4, ///< Left track and direction to south
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TRACKDIR_RIGHT_S = 5, ///< Right track and direction to south
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TRACKDIR_RVREV_NE = 6, ///< (Road vehicle) reverse direction north-east
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TRACKDIR_RVREV_SE = 7, ///< (Road vehicle) reverse direction south-east
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TRACKDIR_X_SW = 8, ///< X-axis and direction to south-west
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TRACKDIR_Y_NW = 9, ///< Y-axis and direction to north-west
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TRACKDIR_UPPER_W = 10, ///< Upper track and direction to west
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TRACKDIR_LOWER_W = 11, ///< Lower track and direction to west
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TRACKDIR_LEFT_N = 12, ///< Left track and direction to north
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TRACKDIR_RIGHT_N = 13, ///< Right track and direction to north
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TRACKDIR_RVREV_SW = 14, ///< (Road vehicle) reverse direction south-west
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TRACKDIR_RVREV_NW = 15, ///< (Road vehicle) reverse direction north-west
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TRACKDIR_END, ///< Used for iterations
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INVALID_TRACKDIR = 0xFF, ///< Flag for an invalid trackdir
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};
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/** Define basic enum properties */
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template <> struct EnumPropsT<Trackdir> : MakeEnumPropsT<Trackdir, byte, TRACKDIR_BEGIN, TRACKDIR_END, INVALID_TRACKDIR> {};
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typedef TinyEnumT<Trackdir> TrackdirByte;
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/**
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* Enumeration of bitmasks for the TrackDirs
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*
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* These are a combination of tracks and directions. Values are 0-5 in one
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* direction (corresponding to the Track enum) and 8-13 in the other direction.
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*/
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enum TrackdirBits {
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TRACKDIR_BIT_NONE = 0x0000, ///< No track build
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TRACKDIR_BIT_X_NE = 0x0001, ///< Track x-axis, direction north-east
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TRACKDIR_BIT_Y_SE = 0x0002, ///< Track y-axis, direction south-east
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TRACKDIR_BIT_UPPER_E = 0x0004, ///< Track upper, direction east
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TRACKDIR_BIT_LOWER_E = 0x0008, ///< Track lower, direction east
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TRACKDIR_BIT_LEFT_S = 0x0010, ///< Track left, direction south
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TRACKDIR_BIT_RIGHT_S = 0x0020, ///< Track right, direction south
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/* Again, note the two missing values here. This enables trackdir -> track conversion by doing (trackdir & 0xFF) */
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TRACKDIR_BIT_X_SW = 0x0100, ///< Track x-axis, direction south-west
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TRACKDIR_BIT_Y_NW = 0x0200, ///< Track y-axis, direction north-west
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TRACKDIR_BIT_UPPER_W = 0x0400, ///< Track upper, direction west
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TRACKDIR_BIT_LOWER_W = 0x0800, ///< Track lower, direction west
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TRACKDIR_BIT_LEFT_N = 0x1000, ///< Track left, direction north
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TRACKDIR_BIT_RIGHT_N = 0x2000, ///< Track right, direction north
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TRACKDIR_BIT_MASK = 0x3F3F, ///< Bitmask for bit-operations
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INVALID_TRACKDIR_BIT = 0xFFFF, ///< Flag for an invalid trackdirbit value
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};
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/** Define basic enum properties */
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template <> struct EnumPropsT<TrackdirBits> : MakeEnumPropsT<TrackdirBits, uint16, TRACKDIR_BIT_NONE, TRACKDIR_BIT_MASK, INVALID_TRACKDIR_BIT> {};
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typedef TinyEnumT<TrackdirBits> TrackdirBitsShort;
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DECLARE_ENUM_AS_BIT_SET(TrackdirBits);
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/** This struct contains all the info that is needed to draw and construct tracks.
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*/
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struct RailtypeInfo {
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@ -284,138 +95,6 @@ enum {
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NUM_SSD_STACK = 32, ///< max amount of blocks to check recursively
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};
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/**
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* Maps a Trackdir to the corresponding TrackdirBits value
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* @param trackdir the track direction to convert
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* @return the converted TrackdirBits value
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*/
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static inline TrackdirBits TrackdirToTrackdirBits(Trackdir trackdir)
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{
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return (TrackdirBits)(1 << trackdir);
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}
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/**
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* Removes first Track from TrackBits and returns it
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*
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* This function searchs for the first bit in the TrackBits,
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* remove this bit from the parameter and returns the found
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* bit as Track value. It returns INVALID_TRACK if the
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* parameter was TRACK_BIT_NONE or INVALID_TRACK_BIT. This
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* is basically used in while-loops to get up to 6 possible
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* tracks on a tile until the parameter becomes TRACK_BIT_NONE.
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*
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* @param tracks The value with the TrackBits
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* @return The first Track from the TrackBits value
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* @see FindFirstTrack
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*/
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static inline Track RemoveFirstTrack(TrackBits *tracks)
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{
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if (*tracks != TRACK_BIT_NONE && *tracks != INVALID_TRACK_BIT) {
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Track first = (Track)FIND_FIRST_BIT(*tracks);
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ClrBit(*tracks, first);
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return first;
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}
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return INVALID_TRACK;
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}
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/**
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* Removes first Trackdir from TrackdirBits and returns it
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*
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* This function searchs for the first bit in the TrackdirBits parameter,
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* remove this bit from the parameter and returns the fnound bit as
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* Trackdir value. It returns INVALID_TRACKDIR if the trackdirs is
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* TRACKDIR_BIT_NONE or INVALID_TRACKDIR_BIT. This is basically used in a
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* while-loop to get all track-directions step by step until the value
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* reaches TRACKDIR_BIT_NONE.
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*
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* @param trackdirs The value with the TrackdirBits
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* @return The first Trackdir from the TrackdirBits value
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* @see FindFirstTrackdir
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*/
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static inline Trackdir RemoveFirstTrackdir(TrackdirBits *trackdirs)
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{
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if (*trackdirs != TRACKDIR_BIT_NONE && *trackdirs != INVALID_TRACKDIR_BIT) {
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Trackdir first = (Trackdir)FindFirstBit2x64(*trackdirs);
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ClrBit(*trackdirs, first);
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return first;
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}
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return INVALID_TRACKDIR;
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}
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/**
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* Returns first Track from TrackBits or INVALID_TRACK
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*
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* This function returns the first Track found in the TrackBits value as Track-value.
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* It returns INVALID_TRACK if the parameter is TRACK_BIT_NONE or INVALID_TRACK_BIT.
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*
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* @param tracks The TrackBits value
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* @return The first Track found or INVALID_TRACK
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* @see RemoveFirstTrack
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*/
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static inline Track FindFirstTrack(TrackBits tracks)
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{
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return (tracks != TRACK_BIT_NONE && tracks != INVALID_TRACK_BIT) ? (Track)FIND_FIRST_BIT(tracks) : INVALID_TRACK;
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}
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/**
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* Converts TrackBits to Track.
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*
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* This function converts a TrackBits value to a Track value. As it
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* is not possible to convert two or more tracks to one track the
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* parameter must contain only one track or be the INVALID_TRACK_BIT value.
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*
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* @param tracks The TrackBits value to convert
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* @return The Track from the value or INVALID_TRACK
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* @pre tracks must contains only one Track or be INVALID_TRACK_BIT
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*/
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static inline Track TrackBitsToTrack(TrackBits tracks)
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{
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assert(tracks == INVALID_TRACK_BIT || (tracks != TRACK_BIT_NONE && KillFirstBit(tracks & TRACK_BIT_MASK) == TRACK_BIT_NONE));
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return tracks != INVALID_TRACK_BIT ? (Track)FIND_FIRST_BIT(tracks & TRACK_BIT_MASK) : INVALID_TRACK;
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}
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/**
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* Returns first Trackdir from TrackdirBits or INVALID_TRACKDIR
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*
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* This function returns the first Trackdir in the given TrackdirBits value or
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* INVALID_TRACKDIR if the value is TRACKDIR_BIT_NONE. The TrackdirBits must
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* not be INVALID_TRACKDIR_BIT.
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*
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* @param trackdirs The TrackdirBits value
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* @return The first Trackdir from the TrackdirBits or INVALID_TRACKDIR on TRACKDIR_BIT_NONE.
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* @pre trackdirs must not be INVALID_TRACKDIR_BIT
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* @see RemoveFirstTrackdir
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*/
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static inline Trackdir FindFirstTrackdir(TrackdirBits trackdirs)
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{
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assert((trackdirs & ~TRACKDIR_BIT_MASK) == TRACKDIR_BIT_NONE);
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return (trackdirs != TRACKDIR_BIT_NONE) ? (Trackdir)FindFirstBit2x64(trackdirs) : INVALID_TRACKDIR;
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}
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/**
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* Checks if a Track is valid.
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*
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* @param track The value to check
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* @return true if the given value is a valid track.
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* @note Use this in an assert()
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*/
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static inline bool IsValidTrack(Track track)
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{
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return track < TRACK_END;
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}
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/**
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* Checks if a Trackdir is valid.
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*
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* @param trackdir The value to check
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* @return true if the given valie is a valid Trackdir
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* @note Use this in an assert()
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*/
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static inline bool IsValidTrackdir(Trackdir trackdir)
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{
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return (TrackdirToTrackdirBits(trackdir) & TRACKDIR_BIT_MASK) != 0;
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}
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/*
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* Functions to map tracks to the corresponding bits in the signal
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* presence/status bytes in the map. You should not use these directly, but
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@ -453,289 +132,6 @@ static inline byte SignalOnTrack(Track track)
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}
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/*
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* Functions describing logical relations between Tracks, TrackBits, Trackdirs
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* TrackdirBits, Direction and DiagDirections.
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*/
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/**
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* Maps a trackdir to the reverse trackdir.
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*
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* Returns the reverse trackdir of a Trackdir value. The reverse trackdir
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* is the same track with the other direction on it.
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*
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* @param trackdir The Trackdir value
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* @return The reverse trackdir
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* @pre trackdir must not be INVALID_TRACKDIR
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*/
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static inline Trackdir ReverseTrackdir(Trackdir trackdir)
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{
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assert(trackdir != INVALID_TRACKDIR);
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return (Trackdir)(trackdir ^ 8);
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}
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/**
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* Returns the Track that a given Trackdir represents
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*
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* This function filters the Track which is used in the Trackdir value and
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* returns it as a Track value.
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*
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* @param trackdir The trackdir value
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* @return The Track which is used in the value
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*/
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static inline Track TrackdirToTrack(Trackdir trackdir)
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{
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return (Track)(trackdir & 0x7);
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}
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/**
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* Returns a Trackdir for the given Track
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*
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* Since every Track corresponds to two Trackdirs, we choose the
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* one which points between NE and S. Note that the actual
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* implementation is quite futile, but this might change
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* in the future.
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*
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* @param track The given Track
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* @return The Trackdir from the given Track
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*/
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static inline Trackdir TrackToTrackdir(Track track)
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{
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return (Trackdir)track;
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}
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/**
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* Returns a TrackdirBit mask from a given Track
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*
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* The TrackdirBit mask contains the two TrackdirBits that
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* correspond with the given Track (one for each direction).
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*
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* @param track The track to get the TrackdirBits from
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* @return The TrackdirBits which the selected tracks
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*/
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static inline TrackdirBits TrackToTrackdirBits(Track track)
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{
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Trackdir td = TrackToTrackdir(track);
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return (TrackdirBits)(TrackdirToTrackdirBits(td) | TrackdirToTrackdirBits(ReverseTrackdir(td)));
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}
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/**
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* Discards all directional information from a TrackdirBits value
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*
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* Any Track which is present in either direction will be present in the result.
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*
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* @param bits The TrackdirBits to get the TrackBits from
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* @return The TrackBits
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*/
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static inline TrackBits TrackdirBitsToTrackBits(TrackdirBits bits)
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{
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return (TrackBits)((bits | (bits >> 8)) & TRACK_BIT_MASK);
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}
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/**
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* Maps a trackdir to the trackdir that you will end up on if you go straight
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* ahead.
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*
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* This will be the same trackdir for diagonal trackdirs, but a
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||||
* different (alternating) one for straight trackdirs
|
||||
*
|
||||
* @param trackdir The given trackdir
|
||||
* @return The next Trackdir value of the next tile.
|
||||
*/
|
||||
static inline Trackdir NextTrackdir(Trackdir trackdir)
|
||||
{
|
||||
extern const Trackdir _next_trackdir[TRACKDIR_END];
|
||||
return _next_trackdir[trackdir];
|
||||
}
|
||||
|
||||
/**
|
||||
* Maps a track to all tracks that make 90 deg turns with it.
|
||||
*
|
||||
* For the diagonal directions these are the complement of the
|
||||
* direction, for the straight directions these are the
|
||||
* two vertical or horizontal tracks, depend on the given direction
|
||||
*
|
||||
* @param track The given track
|
||||
* @return The TrackBits with the tracks marked which cross the given track by 90 deg.
|
||||
*/
|
||||
static inline TrackBits TrackCrossesTracks(Track track)
|
||||
{
|
||||
extern const TrackBits _track_crosses_tracks[TRACK_END];
|
||||
return _track_crosses_tracks[track];
|
||||
}
|
||||
|
||||
/**
|
||||
* Maps a trackdir to the (4-way) direction the tile is exited when following
|
||||
* that trackdir.
|
||||
*
|
||||
* For the diagonal directions these are the same directions. For
|
||||
* the straight directions these are the directions from the imagined
|
||||
* base-tile to the bordering tile which will be joined if the given
|
||||
* straight direction is leaved from the base-tile.
|
||||
*
|
||||
* @param trackdir The given track direction
|
||||
* @return The direction which points to the resulting tile if following the Trackdir
|
||||
*/
|
||||
static inline DiagDirection TrackdirToExitdir(Trackdir trackdir)
|
||||
{
|
||||
extern const DiagDirection _trackdir_to_exitdir[TRACKDIR_END];
|
||||
return _trackdir_to_exitdir[trackdir];
|
||||
}
|
||||
|
||||
/**
|
||||
* Maps a track and an (4-way) dir to the trackdir that represents the track
|
||||
* with the exit in the given direction.
|
||||
*
|
||||
* For the diagonal tracks the resulting track direction are clear for a given
|
||||
* DiagDirection. It either matches the direction or it returns INVALID_TRACKDIR,
|
||||
* as a TRACK_X cannot be applied with DIAG_SE.
|
||||
* For the straight tracks the resulting track direction will be the
|
||||
* direction which the DiagDirection is pointing. But this will be INVALID_TRACKDIR
|
||||
* if the DiagDirection is pointing 'away' the track.
|
||||
*
|
||||
* @param track The track to applie an direction on
|
||||
* @param diagdir The DiagDirection to applie on
|
||||
* @return The resulting track direction or INVALID_TRACKDIR if not possible.
|
||||
*/
|
||||
static inline Trackdir TrackExitdirToTrackdir(Track track, DiagDirection diagdir)
|
||||
{
|
||||
extern const Trackdir _track_exitdir_to_trackdir[TRACK_END][DIAGDIR_END];
|
||||
return _track_exitdir_to_trackdir[track][diagdir];
|
||||
}
|
||||
|
||||
/**
|
||||
* Maps a track and an (4-way) dir to the trackdir that represents the track
|
||||
* with the entry in the given direction.
|
||||
*
|
||||
* For the diagonal tracks the return value is clear, its either the matching
|
||||
* track direction or INVALID_TRACKDIR.
|
||||
* For the straight tracks this returns the track direction which results if
|
||||
* you follow the DiagDirection and then turn by 45 deg left or right on the
|
||||
* next tile. The new direction on the new track will be the returning Trackdir
|
||||
* value. If the parameters makes no sense like the track TRACK_UPPER and the
|
||||
* diraction DIAGDIR_NE (target track cannot be reached) this function returns
|
||||
* INVALID_TRACKDIR.
|
||||
*
|
||||
* @param track The target track
|
||||
* @param diagdir The direction to "come from"
|
||||
* @return the resulting Trackdir or INVALID_TRACKDIR if not possible.
|
||||
*/
|
||||
static inline Trackdir TrackEnterdirToTrackdir(Track track, DiagDirection diagdir)
|
||||
{
|
||||
extern const Trackdir _track_enterdir_to_trackdir[TRACK_END][DIAGDIR_END];
|
||||
return _track_enterdir_to_trackdir[track][diagdir];
|
||||
}
|
||||
|
||||
/**
|
||||
* Maps a track and a full (8-way) direction to the trackdir that represents
|
||||
* the track running in the given direction.
|
||||
*/
|
||||
static inline Trackdir TrackDirectionToTrackdir(Track track, Direction dir)
|
||||
{
|
||||
extern const Trackdir _track_direction_to_trackdir[TRACK_END][DIR_END];
|
||||
return _track_direction_to_trackdir[track][dir];
|
||||
}
|
||||
|
||||
/**
|
||||
* Maps a (4-way) direction to the diagonal trackdir that runs in that
|
||||
* direction.
|
||||
*
|
||||
* @param diagdir The direction
|
||||
* @return The resulting Trackdir direction
|
||||
*/
|
||||
static inline Trackdir DiagdirToDiagTrackdir(DiagDirection diagdir)
|
||||
{
|
||||
extern const Trackdir _dir_to_diag_trackdir[DIAGDIR_END];
|
||||
return _dir_to_diag_trackdir[diagdir];
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns all trackdirs that can be reached when entering a tile from a given
|
||||
* (diagonal) direction.
|
||||
*
|
||||
* This will obviously include 90 degree turns, since no information is available
|
||||
* about the exact angle of entering
|
||||
*
|
||||
* @param diagdir The joining direction
|
||||
* @return The TrackdirBits which can be used from the given direction
|
||||
* @see DiagdirReachesTracks
|
||||
*/
|
||||
static inline TrackdirBits DiagdirReachesTrackdirs(DiagDirection diagdir)
|
||||
{
|
||||
extern const TrackdirBits _exitdir_reaches_trackdirs[DIAGDIR_END];
|
||||
return _exitdir_reaches_trackdirs[diagdir];
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns all tracks that can be reached when entering a tile from a given
|
||||
* (diagonal) direction.
|
||||
*
|
||||
* This will obviously include 90 degree turns, since no
|
||||
* information is available about the exact angle of entering
|
||||
*
|
||||
* @param diagdir The joining irection
|
||||
* @return The tracks which can be used
|
||||
* @see DiagdirReachesTrackdirs
|
||||
*/
|
||||
static inline TrackBits DiagdirReachesTracks(DiagDirection diagdir) { return TrackdirBitsToTrackBits(DiagdirReachesTrackdirs(diagdir)); }
|
||||
|
||||
/**
|
||||
* Maps a trackdir to the trackdirs that can be reached from it (ie, when
|
||||
* entering the next tile.
|
||||
*
|
||||
* This will include 90 degree turns!
|
||||
*
|
||||
* @param trackdir The track direction which will be leaved
|
||||
* @return The track directions which can be used from this direction (in the next tile)
|
||||
*/
|
||||
static inline TrackdirBits TrackdirReachesTrackdirs(Trackdir trackdir)
|
||||
{
|
||||
extern const TrackdirBits _exitdir_reaches_trackdirs[DIAGDIR_END];
|
||||
return _exitdir_reaches_trackdirs[TrackdirToExitdir(trackdir)];
|
||||
}
|
||||
/* Note that there is no direct table for this function (there used to be),
|
||||
* but it uses two simpeler tables to achieve the result */
|
||||
|
||||
/**
|
||||
* Maps a trackdir to all trackdirs that make 90 deg turns with it.
|
||||
*
|
||||
* For the diagonal tracks this returns the track direction bits
|
||||
* of the other axis in both directions, which cannot be joined by
|
||||
* the given track direction.
|
||||
* For the straight tracks this returns all possible 90 deg turns
|
||||
* either on the current tile (which no train can joined) or on the
|
||||
* bordering tiles.
|
||||
*
|
||||
* @param trackdir The track direction
|
||||
* @return The TrackdirBits which are (more or less) 90 deg turns.
|
||||
*/
|
||||
static inline TrackdirBits TrackdirCrossesTrackdirs(Trackdir trackdir)
|
||||
{
|
||||
extern const TrackdirBits _track_crosses_trackdirs[TRACKDIR_END];
|
||||
return _track_crosses_trackdirs[TrackdirToTrack(trackdir)];
|
||||
}
|
||||
|
||||
/**
|
||||
* Checks if a given Track is diagonal
|
||||
*
|
||||
* @param track The given track to check
|
||||
* @return true if diagonal, else false
|
||||
*/
|
||||
static inline bool IsDiagonalTrack(Track track)
|
||||
{
|
||||
return (track == TRACK_X) || (track == TRACK_Y);
|
||||
}
|
||||
|
||||
/**
|
||||
* Checks if a given Trackdir is diagonal.
|
||||
*
|
||||
* @param trackdir The given trackdir
|
||||
* @return true if the trackdir use a diagonal track
|
||||
*/
|
||||
static inline bool IsDiagonalTrackdir(Trackdir trackdir)
|
||||
{
|
||||
return IsDiagonalTrack(TrackdirToTrack(trackdir));
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns a pointer to the Railtype information for a given railtype
|
||||
|
@ -775,23 +171,6 @@ static inline bool HasPowerOnRail(RailType enginetype, RailType tiletype)
|
|||
return HasBit(GetRailTypeInfo(enginetype)->powered_railtypes, tiletype);
|
||||
}
|
||||
|
||||
/**
|
||||
* Checks if the given tracks overlap, ie form a crossing. Basically this
|
||||
* means when there is more than one track on the tile, exept when there are
|
||||
* two parallel tracks.
|
||||
* @param bits The tracks present.
|
||||
* @return Whether the tracks present overlap in any way.
|
||||
*/
|
||||
static inline bool TracksOverlap(TrackBits bits)
|
||||
{
|
||||
/* With no, or only one track, there is no overlap */
|
||||
if (bits == TRACK_BIT_NONE || KillFirstBit(bits) == TRACK_BIT_NONE) return false;
|
||||
/* We know that there are at least two tracks present. When there are more
|
||||
* than 2 tracks, they will surely overlap. When there are two, they will
|
||||
* always overlap unless they are lower & upper or right & left. */
|
||||
return bits != TRACK_BIT_HORZ && bits != TRACK_BIT_VERT;
|
||||
}
|
||||
|
||||
|
||||
extern int _railtype_cost_multiplier[RAILTYPE_END];
|
||||
extern const int _default_railtype_cost_multiplier[RAILTYPE_END];
|
||||
|
|
|
@ -6,6 +6,7 @@
|
|||
#define RAIL_MAP_H
|
||||
|
||||
#include "direction_func.h"
|
||||
#include "track_func.h"
|
||||
#include "rail.h"
|
||||
#include "tile.h"
|
||||
|
||||
|
|
|
@ -0,0 +1,31 @@
|
|||
/* $Id$ */
|
||||
|
||||
/** @file rail_type.h The different types of rail */
|
||||
|
||||
#ifndef RAIL_TYPE_H
|
||||
#define RAIL_TYPE_H
|
||||
|
||||
/**
|
||||
* Enumeration for all possible railtypes.
|
||||
*
|
||||
* This enumeration defines all 4 possible railtypes.
|
||||
*/
|
||||
enum RailType {
|
||||
RAILTYPE_BEGIN = 0, ///< Used for iterations
|
||||
RAILTYPE_RAIL = 0, ///< Standard non-electric rails
|
||||
RAILTYPE_ELECTRIC = 1, ///< Electric rails
|
||||
RAILTYPE_MONO = 2, ///< Monorail
|
||||
RAILTYPE_MAGLEV = 3, ///< Maglev
|
||||
RAILTYPE_END, ///< Used for iterations
|
||||
INVALID_RAILTYPE = 0xFF ///< Flag for invalid railtype
|
||||
};
|
||||
|
||||
typedef byte RailTypeMask;
|
||||
|
||||
/** Allow incrementing of Track variables */
|
||||
DECLARE_POSTFIX_INCREMENT(RailType);
|
||||
/** Define basic enum properties */
|
||||
template <> struct EnumPropsT<RailType> : MakeEnumPropsT<RailType, byte, RAILTYPE_BEGIN, RAILTYPE_END, INVALID_RAILTYPE> {};
|
||||
typedef TinyEnumT<RailType> RailTypeByte;
|
||||
|
||||
#endif /* RAIL_TYPE_H */
|
|
@ -6,7 +6,8 @@
|
|||
#define ROAD_MAP_H
|
||||
|
||||
#include "macros.h"
|
||||
#include "rail.h"
|
||||
#include "track_func.h"
|
||||
#include "rail_type.h"
|
||||
#include "road.h"
|
||||
#include "tile.h"
|
||||
|
||||
|
|
|
@ -0,0 +1,497 @@
|
|||
/* $Id$ */
|
||||
|
||||
/** @file track_func.h Different conversion functions from one kind of track to another. */
|
||||
|
||||
#ifndef TRACK_FUNC_H
|
||||
#define TRACK_FUNC_H
|
||||
|
||||
#include "track_type.h"
|
||||
#include "direction_type.h"
|
||||
|
||||
/**
|
||||
* Convert an Axis to the corresponding Track
|
||||
* AXIS_X -> TRACK_X
|
||||
* AXIS_Y -> TRACK_Y
|
||||
* Uses the fact that they share the same internal encoding
|
||||
*
|
||||
* @param a the axis to convert
|
||||
* @return the track corresponding to the axis
|
||||
*/
|
||||
static inline Track AxisToTrack(Axis a)
|
||||
{
|
||||
return (Track)a;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/**
|
||||
* Maps a Track to the corresponding TrackBits value
|
||||
* @param track the track to convert
|
||||
* @return the converted TrackBits value of the track
|
||||
*/
|
||||
static inline TrackBits TrackToTrackBits(Track track)
|
||||
{
|
||||
return (TrackBits)(1 << track);
|
||||
}
|
||||
|
||||
/**
|
||||
* Maps an Axis to the corresponding TrackBits value
|
||||
* @param a the axis to convert
|
||||
* @return the converted TrackBits value of the axis
|
||||
*/
|
||||
static inline TrackBits AxisToTrackBits(Axis a)
|
||||
{
|
||||
return TrackToTrackBits(AxisToTrack(a));
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns a single horizontal/vertical trackbit, that is in a specific tile corner.
|
||||
*
|
||||
* @param corner The corner of a tile.
|
||||
* @return The TrackBits of the track in the corner.
|
||||
*/
|
||||
static inline TrackBits CornerToTrackBits(Corner corner)
|
||||
{
|
||||
extern const TrackBits _corner_to_trackbits[];
|
||||
assert(IsValidCorner(corner));
|
||||
return _corner_to_trackbits[corner];
|
||||
}
|
||||
|
||||
|
||||
|
||||
/**
|
||||
* Maps a Trackdir to the corresponding TrackdirBits value
|
||||
* @param trackdir the track direction to convert
|
||||
* @return the converted TrackdirBits value
|
||||
*/
|
||||
static inline TrackdirBits TrackdirToTrackdirBits(Trackdir trackdir)
|
||||
{
|
||||
return (TrackdirBits)(1 << trackdir);
|
||||
}
|
||||
|
||||
/**
|
||||
* Removes first Track from TrackBits and returns it
|
||||
*
|
||||
* This function searchs for the first bit in the TrackBits,
|
||||
* remove this bit from the parameter and returns the found
|
||||
* bit as Track value. It returns INVALID_TRACK if the
|
||||
* parameter was TRACK_BIT_NONE or INVALID_TRACK_BIT. This
|
||||
* is basically used in while-loops to get up to 6 possible
|
||||
* tracks on a tile until the parameter becomes TRACK_BIT_NONE.
|
||||
*
|
||||
* @param tracks The value with the TrackBits
|
||||
* @return The first Track from the TrackBits value
|
||||
* @see FindFirstTrack
|
||||
*/
|
||||
static inline Track RemoveFirstTrack(TrackBits *tracks)
|
||||
{
|
||||
if (*tracks != TRACK_BIT_NONE && *tracks != INVALID_TRACK_BIT) {
|
||||
Track first = (Track)FIND_FIRST_BIT(*tracks);
|
||||
ClrBit(*tracks, first);
|
||||
return first;
|
||||
}
|
||||
return INVALID_TRACK;
|
||||
}
|
||||
|
||||
/**
|
||||
* Removes first Trackdir from TrackdirBits and returns it
|
||||
*
|
||||
* This function searchs for the first bit in the TrackdirBits parameter,
|
||||
* remove this bit from the parameter and returns the fnound bit as
|
||||
* Trackdir value. It returns INVALID_TRACKDIR if the trackdirs is
|
||||
* TRACKDIR_BIT_NONE or INVALID_TRACKDIR_BIT. This is basically used in a
|
||||
* while-loop to get all track-directions step by step until the value
|
||||
* reaches TRACKDIR_BIT_NONE.
|
||||
*
|
||||
* @param trackdirs The value with the TrackdirBits
|
||||
* @return The first Trackdir from the TrackdirBits value
|
||||
* @see FindFirstTrackdir
|
||||
*/
|
||||
static inline Trackdir RemoveFirstTrackdir(TrackdirBits *trackdirs)
|
||||
{
|
||||
if (*trackdirs != TRACKDIR_BIT_NONE && *trackdirs != INVALID_TRACKDIR_BIT) {
|
||||
Trackdir first = (Trackdir)FindFirstBit2x64(*trackdirs);
|
||||
ClrBit(*trackdirs, first);
|
||||
return first;
|
||||
}
|
||||
return INVALID_TRACKDIR;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns first Track from TrackBits or INVALID_TRACK
|
||||
*
|
||||
* This function returns the first Track found in the TrackBits value as Track-value.
|
||||
* It returns INVALID_TRACK if the parameter is TRACK_BIT_NONE or INVALID_TRACK_BIT.
|
||||
*
|
||||
* @param tracks The TrackBits value
|
||||
* @return The first Track found or INVALID_TRACK
|
||||
* @see RemoveFirstTrack
|
||||
*/
|
||||
static inline Track FindFirstTrack(TrackBits tracks)
|
||||
{
|
||||
return (tracks != TRACK_BIT_NONE && tracks != INVALID_TRACK_BIT) ? (Track)FIND_FIRST_BIT(tracks) : INVALID_TRACK;
|
||||
}
|
||||
|
||||
/**
|
||||
* Converts TrackBits to Track.
|
||||
*
|
||||
* This function converts a TrackBits value to a Track value. As it
|
||||
* is not possible to convert two or more tracks to one track the
|
||||
* parameter must contain only one track or be the INVALID_TRACK_BIT value.
|
||||
*
|
||||
* @param tracks The TrackBits value to convert
|
||||
* @return The Track from the value or INVALID_TRACK
|
||||
* @pre tracks must contains only one Track or be INVALID_TRACK_BIT
|
||||
*/
|
||||
static inline Track TrackBitsToTrack(TrackBits tracks)
|
||||
{
|
||||
assert(tracks == INVALID_TRACK_BIT || (tracks != TRACK_BIT_NONE && KillFirstBit(tracks & TRACK_BIT_MASK) == TRACK_BIT_NONE));
|
||||
return tracks != INVALID_TRACK_BIT ? (Track)FIND_FIRST_BIT(tracks & TRACK_BIT_MASK) : INVALID_TRACK;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns first Trackdir from TrackdirBits or INVALID_TRACKDIR
|
||||
*
|
||||
* This function returns the first Trackdir in the given TrackdirBits value or
|
||||
* INVALID_TRACKDIR if the value is TRACKDIR_BIT_NONE. The TrackdirBits must
|
||||
* not be INVALID_TRACKDIR_BIT.
|
||||
*
|
||||
* @param trackdirs The TrackdirBits value
|
||||
* @return The first Trackdir from the TrackdirBits or INVALID_TRACKDIR on TRACKDIR_BIT_NONE.
|
||||
* @pre trackdirs must not be INVALID_TRACKDIR_BIT
|
||||
* @see RemoveFirstTrackdir
|
||||
*/
|
||||
static inline Trackdir FindFirstTrackdir(TrackdirBits trackdirs)
|
||||
{
|
||||
assert((trackdirs & ~TRACKDIR_BIT_MASK) == TRACKDIR_BIT_NONE);
|
||||
return (trackdirs != TRACKDIR_BIT_NONE) ? (Trackdir)FindFirstBit2x64(trackdirs) : INVALID_TRACKDIR;
|
||||
}
|
||||
|
||||
/**
|
||||
* Checks if a Track is valid.
|
||||
*
|
||||
* @param track The value to check
|
||||
* @return true if the given value is a valid track.
|
||||
* @note Use this in an assert()
|
||||
*/
|
||||
static inline bool IsValidTrack(Track track)
|
||||
{
|
||||
return track < TRACK_END;
|
||||
}
|
||||
|
||||
/**
|
||||
* Checks if a Trackdir is valid.
|
||||
*
|
||||
* @param trackdir The value to check
|
||||
* @return true if the given valie is a valid Trackdir
|
||||
* @note Use this in an assert()
|
||||
*/
|
||||
static inline bool IsValidTrackdir(Trackdir trackdir)
|
||||
{
|
||||
return (TrackdirToTrackdirBits(trackdir) & TRACKDIR_BIT_MASK) != 0;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Functions describing logical relations between Tracks, TrackBits, Trackdirs
|
||||
* TrackdirBits, Direction and DiagDirections.
|
||||
*/
|
||||
|
||||
/**
|
||||
* Maps a trackdir to the reverse trackdir.
|
||||
*
|
||||
* Returns the reverse trackdir of a Trackdir value. The reverse trackdir
|
||||
* is the same track with the other direction on it.
|
||||
*
|
||||
* @param trackdir The Trackdir value
|
||||
* @return The reverse trackdir
|
||||
* @pre trackdir must not be INVALID_TRACKDIR
|
||||
*/
|
||||
static inline Trackdir ReverseTrackdir(Trackdir trackdir)
|
||||
{
|
||||
assert(trackdir != INVALID_TRACKDIR);
|
||||
return (Trackdir)(trackdir ^ 8);
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the Track that a given Trackdir represents
|
||||
*
|
||||
* This function filters the Track which is used in the Trackdir value and
|
||||
* returns it as a Track value.
|
||||
*
|
||||
* @param trackdir The trackdir value
|
||||
* @return The Track which is used in the value
|
||||
*/
|
||||
static inline Track TrackdirToTrack(Trackdir trackdir)
|
||||
{
|
||||
return (Track)(trackdir & 0x7);
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns a Trackdir for the given Track
|
||||
*
|
||||
* Since every Track corresponds to two Trackdirs, we choose the
|
||||
* one which points between NE and S. Note that the actual
|
||||
* implementation is quite futile, but this might change
|
||||
* in the future.
|
||||
*
|
||||
* @param track The given Track
|
||||
* @return The Trackdir from the given Track
|
||||
*/
|
||||
static inline Trackdir TrackToTrackdir(Track track)
|
||||
{
|
||||
return (Trackdir)track;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns a TrackdirBit mask from a given Track
|
||||
*
|
||||
* The TrackdirBit mask contains the two TrackdirBits that
|
||||
* correspond with the given Track (one for each direction).
|
||||
*
|
||||
* @param track The track to get the TrackdirBits from
|
||||
* @return The TrackdirBits which the selected tracks
|
||||
*/
|
||||
static inline TrackdirBits TrackToTrackdirBits(Track track)
|
||||
{
|
||||
Trackdir td = TrackToTrackdir(track);
|
||||
return (TrackdirBits)(TrackdirToTrackdirBits(td) | TrackdirToTrackdirBits(ReverseTrackdir(td)));
|
||||
}
|
||||
|
||||
/**
|
||||
* Discards all directional information from a TrackdirBits value
|
||||
*
|
||||
* Any Track which is present in either direction will be present in the result.
|
||||
*
|
||||
* @param bits The TrackdirBits to get the TrackBits from
|
||||
* @return The TrackBits
|
||||
*/
|
||||
static inline TrackBits TrackdirBitsToTrackBits(TrackdirBits bits)
|
||||
{
|
||||
return (TrackBits)((bits | (bits >> 8)) & TRACK_BIT_MASK);
|
||||
}
|
||||
|
||||
/**
|
||||
* Maps a trackdir to the trackdir that you will end up on if you go straight
|
||||
* ahead.
|
||||
*
|
||||
* This will be the same trackdir for diagonal trackdirs, but a
|
||||
* different (alternating) one for straight trackdirs
|
||||
*
|
||||
* @param trackdir The given trackdir
|
||||
* @return The next Trackdir value of the next tile.
|
||||
*/
|
||||
static inline Trackdir NextTrackdir(Trackdir trackdir)
|
||||
{
|
||||
extern const Trackdir _next_trackdir[TRACKDIR_END];
|
||||
return _next_trackdir[trackdir];
|
||||
}
|
||||
|
||||
/**
|
||||
* Maps a track to all tracks that make 90 deg turns with it.
|
||||
*
|
||||
* For the diagonal directions these are the complement of the
|
||||
* direction, for the straight directions these are the
|
||||
* two vertical or horizontal tracks, depend on the given direction
|
||||
*
|
||||
* @param track The given track
|
||||
* @return The TrackBits with the tracks marked which cross the given track by 90 deg.
|
||||
*/
|
||||
static inline TrackBits TrackCrossesTracks(Track track)
|
||||
{
|
||||
extern const TrackBits _track_crosses_tracks[TRACK_END];
|
||||
return _track_crosses_tracks[track];
|
||||
}
|
||||
|
||||
/**
|
||||
* Maps a trackdir to the (4-way) direction the tile is exited when following
|
||||
* that trackdir.
|
||||
*
|
||||
* For the diagonal directions these are the same directions. For
|
||||
* the straight directions these are the directions from the imagined
|
||||
* base-tile to the bordering tile which will be joined if the given
|
||||
* straight direction is leaved from the base-tile.
|
||||
*
|
||||
* @param trackdir The given track direction
|
||||
* @return The direction which points to the resulting tile if following the Trackdir
|
||||
*/
|
||||
static inline DiagDirection TrackdirToExitdir(Trackdir trackdir)
|
||||
{
|
||||
extern const DiagDirection _trackdir_to_exitdir[TRACKDIR_END];
|
||||
return _trackdir_to_exitdir[trackdir];
|
||||
}
|
||||
|
||||
/**
|
||||
* Maps a track and an (4-way) dir to the trackdir that represents the track
|
||||
* with the exit in the given direction.
|
||||
*
|
||||
* For the diagonal tracks the resulting track direction are clear for a given
|
||||
* DiagDirection. It either matches the direction or it returns INVALID_TRACKDIR,
|
||||
* as a TRACK_X cannot be applied with DIAG_SE.
|
||||
* For the straight tracks the resulting track direction will be the
|
||||
* direction which the DiagDirection is pointing. But this will be INVALID_TRACKDIR
|
||||
* if the DiagDirection is pointing 'away' the track.
|
||||
*
|
||||
* @param track The track to applie an direction on
|
||||
* @param diagdir The DiagDirection to applie on
|
||||
* @return The resulting track direction or INVALID_TRACKDIR if not possible.
|
||||
*/
|
||||
static inline Trackdir TrackExitdirToTrackdir(Track track, DiagDirection diagdir)
|
||||
{
|
||||
extern const Trackdir _track_exitdir_to_trackdir[TRACK_END][DIAGDIR_END];
|
||||
return _track_exitdir_to_trackdir[track][diagdir];
|
||||
}
|
||||
|
||||
/**
|
||||
* Maps a track and an (4-way) dir to the trackdir that represents the track
|
||||
* with the entry in the given direction.
|
||||
*
|
||||
* For the diagonal tracks the return value is clear, its either the matching
|
||||
* track direction or INVALID_TRACKDIR.
|
||||
* For the straight tracks this returns the track direction which results if
|
||||
* you follow the DiagDirection and then turn by 45 deg left or right on the
|
||||
* next tile. The new direction on the new track will be the returning Trackdir
|
||||
* value. If the parameters makes no sense like the track TRACK_UPPER and the
|
||||
* diraction DIAGDIR_NE (target track cannot be reached) this function returns
|
||||
* INVALID_TRACKDIR.
|
||||
*
|
||||
* @param track The target track
|
||||
* @param diagdir The direction to "come from"
|
||||
* @return the resulting Trackdir or INVALID_TRACKDIR if not possible.
|
||||
*/
|
||||
static inline Trackdir TrackEnterdirToTrackdir(Track track, DiagDirection diagdir)
|
||||
{
|
||||
extern const Trackdir _track_enterdir_to_trackdir[TRACK_END][DIAGDIR_END];
|
||||
return _track_enterdir_to_trackdir[track][diagdir];
|
||||
}
|
||||
|
||||
/**
|
||||
* Maps a track and a full (8-way) direction to the trackdir that represents
|
||||
* the track running in the given direction.
|
||||
*/
|
||||
static inline Trackdir TrackDirectionToTrackdir(Track track, Direction dir)
|
||||
{
|
||||
extern const Trackdir _track_direction_to_trackdir[TRACK_END][DIR_END];
|
||||
return _track_direction_to_trackdir[track][dir];
|
||||
}
|
||||
|
||||
/**
|
||||
* Maps a (4-way) direction to the diagonal trackdir that runs in that
|
||||
* direction.
|
||||
*
|
||||
* @param diagdir The direction
|
||||
* @return The resulting Trackdir direction
|
||||
*/
|
||||
static inline Trackdir DiagdirToDiagTrackdir(DiagDirection diagdir)
|
||||
{
|
||||
extern const Trackdir _dir_to_diag_trackdir[DIAGDIR_END];
|
||||
return _dir_to_diag_trackdir[diagdir];
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns all trackdirs that can be reached when entering a tile from a given
|
||||
* (diagonal) direction.
|
||||
*
|
||||
* This will obviously include 90 degree turns, since no information is available
|
||||
* about the exact angle of entering
|
||||
*
|
||||
* @param diagdir The joining direction
|
||||
* @return The TrackdirBits which can be used from the given direction
|
||||
* @see DiagdirReachesTracks
|
||||
*/
|
||||
static inline TrackdirBits DiagdirReachesTrackdirs(DiagDirection diagdir)
|
||||
{
|
||||
extern const TrackdirBits _exitdir_reaches_trackdirs[DIAGDIR_END];
|
||||
return _exitdir_reaches_trackdirs[diagdir];
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns all tracks that can be reached when entering a tile from a given
|
||||
* (diagonal) direction.
|
||||
*
|
||||
* This will obviously include 90 degree turns, since no
|
||||
* information is available about the exact angle of entering
|
||||
*
|
||||
* @param diagdir The joining irection
|
||||
* @return The tracks which can be used
|
||||
* @see DiagdirReachesTrackdirs
|
||||
*/
|
||||
static inline TrackBits DiagdirReachesTracks(DiagDirection diagdir) { return TrackdirBitsToTrackBits(DiagdirReachesTrackdirs(diagdir)); }
|
||||
|
||||
/**
|
||||
* Maps a trackdir to the trackdirs that can be reached from it (ie, when
|
||||
* entering the next tile.
|
||||
*
|
||||
* This will include 90 degree turns!
|
||||
*
|
||||
* @param trackdir The track direction which will be leaved
|
||||
* @return The track directions which can be used from this direction (in the next tile)
|
||||
*/
|
||||
static inline TrackdirBits TrackdirReachesTrackdirs(Trackdir trackdir)
|
||||
{
|
||||
extern const TrackdirBits _exitdir_reaches_trackdirs[DIAGDIR_END];
|
||||
return _exitdir_reaches_trackdirs[TrackdirToExitdir(trackdir)];
|
||||
}
|
||||
/* Note that there is no direct table for this function (there used to be),
|
||||
* but it uses two simpeler tables to achieve the result */
|
||||
|
||||
/**
|
||||
* Maps a trackdir to all trackdirs that make 90 deg turns with it.
|
||||
*
|
||||
* For the diagonal tracks this returns the track direction bits
|
||||
* of the other axis in both directions, which cannot be joined by
|
||||
* the given track direction.
|
||||
* For the straight tracks this returns all possible 90 deg turns
|
||||
* either on the current tile (which no train can joined) or on the
|
||||
* bordering tiles.
|
||||
*
|
||||
* @param trackdir The track direction
|
||||
* @return The TrackdirBits which are (more or less) 90 deg turns.
|
||||
*/
|
||||
static inline TrackdirBits TrackdirCrossesTrackdirs(Trackdir trackdir)
|
||||
{
|
||||
extern const TrackdirBits _track_crosses_trackdirs[TRACKDIR_END];
|
||||
return _track_crosses_trackdirs[TrackdirToTrack(trackdir)];
|
||||
}
|
||||
|
||||
/**
|
||||
* Checks if a given Track is diagonal
|
||||
*
|
||||
* @param track The given track to check
|
||||
* @return true if diagonal, else false
|
||||
*/
|
||||
static inline bool IsDiagonalTrack(Track track)
|
||||
{
|
||||
return (track == TRACK_X) || (track == TRACK_Y);
|
||||
}
|
||||
|
||||
/**
|
||||
* Checks if a given Trackdir is diagonal.
|
||||
*
|
||||
* @param trackdir The given trackdir
|
||||
* @return true if the trackdir use a diagonal track
|
||||
*/
|
||||
static inline bool IsDiagonalTrackdir(Trackdir trackdir)
|
||||
{
|
||||
return IsDiagonalTrack(TrackdirToTrack(trackdir));
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Checks if the given tracks overlap, ie form a crossing. Basically this
|
||||
* means when there is more than one track on the tile, exept when there are
|
||||
* two parallel tracks.
|
||||
* @param bits The tracks present.
|
||||
* @return Whether the tracks present overlap in any way.
|
||||
*/
|
||||
static inline bool TracksOverlap(TrackBits bits)
|
||||
{
|
||||
/* With no, or only one track, there is no overlap */
|
||||
if (bits == TRACK_BIT_NONE || KillFirstBit(bits) == TRACK_BIT_NONE) return false;
|
||||
/* We know that there are at least two tracks present. When there are more
|
||||
* than 2 tracks, they will surely overlap. When there are two, they will
|
||||
* always overlap unless they are lower & upper or right & left. */
|
||||
return bits != TRACK_BIT_HORZ && bits != TRACK_BIT_VERT;
|
||||
}
|
||||
|
||||
#endif /* RAIL_H */
|
|
@ -0,0 +1,125 @@
|
|||
/* $Id$ */
|
||||
|
||||
/** @file track_type.h All types related to tracks */
|
||||
|
||||
#ifndef TRACK_TYPE_H
|
||||
#define TRACK_TYPE_H
|
||||
|
||||
/**
|
||||
* These are used to specify a single track.
|
||||
* Can be translated to a trackbit with TrackToTrackbit
|
||||
*/
|
||||
enum Track {
|
||||
TRACK_BEGIN = 0, ///< Used for iterations
|
||||
TRACK_X = 0, ///< Track along the x-axis (north-east to south-west)
|
||||
TRACK_Y = 1, ///< Track along the y-axis (north-west to south-east)
|
||||
TRACK_UPPER = 2, ///< Track in the upper corner of the tile (north)
|
||||
TRACK_LOWER = 3, ///< Track in the lower corner of the tile (south)
|
||||
TRACK_LEFT = 4, ///< Track in the left corner of the tile (west)
|
||||
TRACK_RIGHT = 5, ///< Track in the right corner of the tile (east)
|
||||
TRACK_END, ///< Used for iterations
|
||||
INVALID_TRACK = 0xFF ///< Flag for an invalid track
|
||||
};
|
||||
|
||||
/** Allow incrementing of Track variables */
|
||||
DECLARE_POSTFIX_INCREMENT(Track);
|
||||
/** Define basic enum properties */
|
||||
template <> struct EnumPropsT<Track> : MakeEnumPropsT<Track, byte, TRACK_BEGIN, TRACK_END, INVALID_TRACK> {};
|
||||
typedef TinyEnumT<Track> TrackByte;
|
||||
|
||||
|
||||
/** Bitfield corresponding to Track */
|
||||
enum TrackBits {
|
||||
TRACK_BIT_NONE = 0U, ///< No track
|
||||
TRACK_BIT_X = 1U << TRACK_X, ///< X-axis track
|
||||
TRACK_BIT_Y = 1U << TRACK_Y, ///< Y-axis track
|
||||
TRACK_BIT_UPPER = 1U << TRACK_UPPER, ///< Upper track
|
||||
TRACK_BIT_LOWER = 1U << TRACK_LOWER, ///< Lower track
|
||||
TRACK_BIT_LEFT = 1U << TRACK_LEFT, ///< Left track
|
||||
TRACK_BIT_RIGHT = 1U << TRACK_RIGHT, ///< Right track
|
||||
TRACK_BIT_CROSS = TRACK_BIT_X | TRACK_BIT_Y, ///< X-Y-axis cross
|
||||
TRACK_BIT_HORZ = TRACK_BIT_UPPER | TRACK_BIT_LOWER, ///< Upper and lower track
|
||||
TRACK_BIT_VERT = TRACK_BIT_LEFT | TRACK_BIT_RIGHT, ///< Left and right track
|
||||
TRACK_BIT_3WAY_NE = TRACK_BIT_X | TRACK_BIT_UPPER | TRACK_BIT_RIGHT,///< "Arrow" to the north-east
|
||||
TRACK_BIT_3WAY_SE = TRACK_BIT_Y | TRACK_BIT_LOWER | TRACK_BIT_RIGHT,///< "Arrow" to the south-east
|
||||
TRACK_BIT_3WAY_SW = TRACK_BIT_X | TRACK_BIT_LOWER | TRACK_BIT_LEFT, ///< "Arrow" to the south-west
|
||||
TRACK_BIT_3WAY_NW = TRACK_BIT_Y | TRACK_BIT_UPPER | TRACK_BIT_LEFT, ///< "Arrow" to the north-west
|
||||
TRACK_BIT_ALL = TRACK_BIT_CROSS | TRACK_BIT_HORZ | TRACK_BIT_VERT, ///< All possible tracks
|
||||
TRACK_BIT_MASK = 0x3FU, ///< Bitmask for the first 6 bits
|
||||
TRACK_BIT_WORMHOLE = 0x40U, ///< Bitflag for a wormhole (used for tunnels)
|
||||
TRACK_BIT_DEPOT = 0x80U, ///< Bitflag for a depot
|
||||
INVALID_TRACK_BIT = 0xFF ///< Flag for an invalid trackbits value
|
||||
};
|
||||
|
||||
/** Define basic enum properties */
|
||||
template <> struct EnumPropsT<TrackBits> : MakeEnumPropsT<TrackBits, byte, TRACK_BIT_NONE, TRACK_BIT_ALL, INVALID_TRACK_BIT> {};
|
||||
typedef TinyEnumT<TrackBits> TrackBitsByte;
|
||||
|
||||
DECLARE_ENUM_AS_BIT_SET(TrackBits);
|
||||
|
||||
/**
|
||||
* Enumeration for tracks and directions.
|
||||
*
|
||||
* These are a combination of tracks and directions. Values are 0-5 in one
|
||||
* direction (corresponding to the Track enum) and 8-13 in the other direction.
|
||||
* 6, 7, 14 and 15 are used to encode the reversing of road vehicles. Those
|
||||
* reversing track dirs are not considered to be 'valid' except in a small
|
||||
* corner in the road vehicle controller.
|
||||
*/
|
||||
enum Trackdir {
|
||||
TRACKDIR_BEGIN = 0, ///< Used for iterations
|
||||
TRACKDIR_X_NE = 0, ///< X-axis and direction to north-east
|
||||
TRACKDIR_Y_SE = 1, ///< Y-axis and direction to south-east
|
||||
TRACKDIR_UPPER_E = 2, ///< Upper track and direction to east
|
||||
TRACKDIR_LOWER_E = 3, ///< Lower track and direction to east
|
||||
TRACKDIR_LEFT_S = 4, ///< Left track and direction to south
|
||||
TRACKDIR_RIGHT_S = 5, ///< Right track and direction to south
|
||||
TRACKDIR_RVREV_NE = 6, ///< (Road vehicle) reverse direction north-east
|
||||
TRACKDIR_RVREV_SE = 7, ///< (Road vehicle) reverse direction south-east
|
||||
TRACKDIR_X_SW = 8, ///< X-axis and direction to south-west
|
||||
TRACKDIR_Y_NW = 9, ///< Y-axis and direction to north-west
|
||||
TRACKDIR_UPPER_W = 10, ///< Upper track and direction to west
|
||||
TRACKDIR_LOWER_W = 11, ///< Lower track and direction to west
|
||||
TRACKDIR_LEFT_N = 12, ///< Left track and direction to north
|
||||
TRACKDIR_RIGHT_N = 13, ///< Right track and direction to north
|
||||
TRACKDIR_RVREV_SW = 14, ///< (Road vehicle) reverse direction south-west
|
||||
TRACKDIR_RVREV_NW = 15, ///< (Road vehicle) reverse direction north-west
|
||||
TRACKDIR_END, ///< Used for iterations
|
||||
INVALID_TRACKDIR = 0xFF, ///< Flag for an invalid trackdir
|
||||
};
|
||||
|
||||
/** Define basic enum properties */
|
||||
template <> struct EnumPropsT<Trackdir> : MakeEnumPropsT<Trackdir, byte, TRACKDIR_BEGIN, TRACKDIR_END, INVALID_TRACKDIR> {};
|
||||
typedef TinyEnumT<Trackdir> TrackdirByte;
|
||||
|
||||
/**
|
||||
* Enumeration of bitmasks for the TrackDirs
|
||||
*
|
||||
* These are a combination of tracks and directions. Values are 0-5 in one
|
||||
* direction (corresponding to the Track enum) and 8-13 in the other direction.
|
||||
*/
|
||||
enum TrackdirBits {
|
||||
TRACKDIR_BIT_NONE = 0x0000, ///< No track build
|
||||
TRACKDIR_BIT_X_NE = 0x0001, ///< Track x-axis, direction north-east
|
||||
TRACKDIR_BIT_Y_SE = 0x0002, ///< Track y-axis, direction south-east
|
||||
TRACKDIR_BIT_UPPER_E = 0x0004, ///< Track upper, direction east
|
||||
TRACKDIR_BIT_LOWER_E = 0x0008, ///< Track lower, direction east
|
||||
TRACKDIR_BIT_LEFT_S = 0x0010, ///< Track left, direction south
|
||||
TRACKDIR_BIT_RIGHT_S = 0x0020, ///< Track right, direction south
|
||||
/* Again, note the two missing values here. This enables trackdir -> track conversion by doing (trackdir & 0xFF) */
|
||||
TRACKDIR_BIT_X_SW = 0x0100, ///< Track x-axis, direction south-west
|
||||
TRACKDIR_BIT_Y_NW = 0x0200, ///< Track y-axis, direction north-west
|
||||
TRACKDIR_BIT_UPPER_W = 0x0400, ///< Track upper, direction west
|
||||
TRACKDIR_BIT_LOWER_W = 0x0800, ///< Track lower, direction west
|
||||
TRACKDIR_BIT_LEFT_N = 0x1000, ///< Track left, direction north
|
||||
TRACKDIR_BIT_RIGHT_N = 0x2000, ///< Track right, direction north
|
||||
TRACKDIR_BIT_MASK = 0x3F3F, ///< Bitmask for bit-operations
|
||||
INVALID_TRACKDIR_BIT = 0xFFFF, ///< Flag for an invalid trackdirbit value
|
||||
};
|
||||
|
||||
/** Define basic enum properties */
|
||||
template <> struct EnumPropsT<TrackdirBits> : MakeEnumPropsT<TrackdirBits, uint16, TRACKDIR_BIT_NONE, TRACKDIR_BIT_MASK, INVALID_TRACKDIR_BIT> {};
|
||||
typedef TinyEnumT<TrackdirBits> TrackdirBitsShort;
|
||||
DECLARE_ENUM_AS_BIT_SET(TrackdirBits);
|
||||
|
||||
#endif /* RAIL_H */
|
Loading…
Reference in New Issue