1

#include "stdafx.h"

     2

#include "openttd.h"

     3

#include "rail.h"

     5

     6

/* XXX: Below 3 tables store duplicate data. Maybe remove some? */

     7

/* Maps a trackdir to the bit that stores its status in the map arrays, in the

     8

 * direction along with the trackdir */

     9

const byte _signal_along_trackdir[] = {

    10

	0x80, 0x80, 0x80, 0x20, 0x40, 0x10, 0, 0,

    11

	0x40, 0x40, 0x40, 0x10, 0x80, 0x20

    12

};

    13

    14

/* Maps a trackdir to the bit that stores its status in the map arrays, in the

    15

 * direction against the trackdir */

    16

const byte _signal_against_trackdir[] = {

    17

	0x40, 0x40, 0x40, 0x10, 0x80, 0x20, 0, 0,

    18

	0x80, 0x80, 0x80, 0x20, 0x40, 0x10

    19

};

    20

    21

/* Maps a Track to the bits that store the status of the two signals that can

    22

 * be present on the given track */

    23

const byte _signal_on_track[] = {

    24

	0xC0, 0xC0, 0xC0, 0x30, 0xC0, 0x30

    25

};

    26

    27

/* Maps a diagonal direction to the all trackdirs that are connected to any

    28

 * track entering in this direction (including those making 90 degree turns)

    29

 */

    30

const TrackdirBits _exitdir_reaches_trackdirs[] = {

    31

	TRACKDIR_BIT_DIAG1_NE | TRACKDIR_BIT_LOWER_E | TRACKDIR_BIT_LEFT_N,  /* DIAGDIR_NE */

    32

	TRACKDIR_BIT_DIAG2_SE | TRACKDIR_BIT_LEFT_S  | TRACKDIR_BIT_UPPER_E, /* DIAGDIR_SE */

    33

	TRACKDIR_BIT_DIAG1_SW | TRACKDIR_BIT_UPPER_W | TRACKDIR_BIT_RIGHT_S, /* DIAGDIR_SW */

    34

	TRACKDIR_BIT_DIAG2_NW | TRACKDIR_BIT_RIGHT_N | TRACKDIR_BIT_LOWER_W  /* DIAGDIR_NW */

    35

};

    36

    37

const Trackdir _next_trackdir[] = {

    38

	TRACKDIR_DIAG1_NE,  TRACKDIR_DIAG2_SE,  TRACKDIR_LOWER_E, TRACKDIR_UPPER_E, TRACKDIR_RIGHT_S, TRACKDIR_LEFT_S, INVALID_TRACKDIR, INVALID_TRACKDIR,

    39

	TRACKDIR_DIAG1_SW,  TRACKDIR_DIAG2_NW,  TRACKDIR_LOWER_W, TRACKDIR_UPPER_W, TRACKDIR_RIGHT_N, TRACKDIR_LEFT_N

    40

};

    41

    42

/* Maps a trackdir to all trackdirs that make 90 deg turns with it. */

    43

const TrackdirBits _track_crosses_trackdirs[] = {

    44

	TRACKDIR_BIT_DIAG2_SE | TRACKDIR_BIT_DIAG2_NW,                                               /* TRACK_DIAG1 */

    45

	TRACKDIR_BIT_DIAG1_NE | TRACKDIR_BIT_DIAG1_SW,                                               /* TRACK_DIAG2 */

    46

	TRACKDIR_BIT_RIGHT_N  | TRACKDIR_BIT_RIGHT_S  | TRACKDIR_BIT_LEFT_N  | TRACKDIR_BIT_LEFT_S,  /* TRACK_UPPER */

    47

	TRACKDIR_BIT_RIGHT_N  | TRACKDIR_BIT_RIGHT_S  | TRACKDIR_BIT_LEFT_N  | TRACKDIR_BIT_LEFT_S,  /* TRACK_LOWER */

    48

	TRACKDIR_BIT_UPPER_W  | TRACKDIR_BIT_UPPER_E  | TRACKDIR_BIT_LOWER_W | TRACKDIR_BIT_LOWER_E, /* TRACK_LEFT  */

    49

	TRACKDIR_BIT_UPPER_W  | TRACKDIR_BIT_UPPER_E  | TRACKDIR_BIT_LOWER_W | TRACKDIR_BIT_LOWER_E  /* TRACK_RIGHT */

    50

};

    51

    52

/* Maps a track to all tracks that make 90 deg turns with it. */

    53

const TrackBits _track_crosses_tracks[] = {

    54

	TRACK_BIT_DIAG2,                   /* TRACK_DIAG1 */

    55

	TRACK_BIT_DIAG1,                   /* TRACK_DIAG2 */

    56

	TRACK_BIT_LEFT  | TRACK_BIT_RIGHT, /* TRACK_UPPER */

    57

	TRACK_BIT_LEFT  | TRACK_BIT_RIGHT, /* TRACK_LOWER */

    58

	TRACK_BIT_UPPER | TRACK_BIT_LOWER, /* TRACK_LEFT  */

    59

	TRACK_BIT_UPPER | TRACK_BIT_LOWER  /* TRACK_RIGHT */

    60

};

    61

    62

/* Maps a trackdir to the (4-way) direction the tile is exited when following

    63

 * that trackdir */

    64

const DiagDirection _trackdir_to_exitdir[] = {

    65

	DIAGDIR_NE,DIAGDIR_SE,DIAGDIR_NE,DIAGDIR_SE,DIAGDIR_SW,DIAGDIR_SE, DIAGDIR_NE,DIAGDIR_NE,

    66

	DIAGDIR_SW,DIAGDIR_NW,DIAGDIR_NW,DIAGDIR_SW,DIAGDIR_NW,DIAGDIR_NE,

    67

};

    68

    69

const Trackdir _track_exitdir_to_trackdir[][DIAGDIR_END] = {

    70

	{TRACKDIR_DIAG1_NE, INVALID_TRACKDIR,  TRACKDIR_DIAG1_SW, INVALID_TRACKDIR},

    71

	{INVALID_TRACKDIR,  TRACKDIR_DIAG2_SE, INVALID_TRACKDIR,  TRACKDIR_DIAG2_NW},

    72

	{TRACKDIR_UPPER_E,  INVALID_TRACKDIR,  INVALID_TRACKDIR,  TRACKDIR_UPPER_W},

    73

	{INVALID_TRACKDIR,  TRACKDIR_LOWER_E,  TRACKDIR_LOWER_W,  INVALID_TRACKDIR},

    74

	{INVALID_TRACKDIR,  INVALID_TRACKDIR,  TRACKDIR_LEFT_S,   TRACKDIR_LEFT_N},

    75

	{TRACKDIR_RIGHT_N,  TRACKDIR_RIGHT_S,  INVALID_TRACKDIR,  INVALID_TRACKDIR}

    76

};

    77

    78

const Trackdir _track_direction_to_trackdir[][DIR_END] = {

    79

	{INVALID_TRACKDIR, TRACKDIR_DIAG1_NE, INVALID_TRACKDIR, INVALID_TRACKDIR,  INVALID_TRACKDIR, TRACKDIR_DIAG1_SW, INVALID_TRACKDIR, INVALID_TRACKDIR},

    80

	{INVALID_TRACKDIR, INVALID_TRACKDIR,  INVALID_TRACKDIR, TRACKDIR_DIAG2_SE, INVALID_TRACKDIR, INVALID_TRACKDIR,  INVALID_TRACKDIR, TRACKDIR_DIAG2_NW},

    81

	{INVALID_TRACKDIR, INVALID_TRACKDIR,  TRACKDIR_UPPER_E, INVALID_TRACKDIR,  INVALID_TRACKDIR, INVALID_TRACKDIR,  TRACKDIR_UPPER_W, INVALID_TRACKDIR},

    82

	{INVALID_TRACKDIR, INVALID_TRACKDIR,  TRACKDIR_LOWER_E, INVALID_TRACKDIR,  INVALID_TRACKDIR, INVALID_TRACKDIR,  TRACKDIR_LOWER_W, INVALID_TRACKDIR},

    83

	{TRACKDIR_LEFT_N,  INVALID_TRACKDIR,  INVALID_TRACKDIR, INVALID_TRACKDIR,  TRACKDIR_LEFT_S,  INVALID_TRACKDIR,  INVALID_TRACKDIR, INVALID_TRACKDIR},

    84

	{TRACKDIR_RIGHT_N, INVALID_TRACKDIR,  INVALID_TRACKDIR, INVALID_TRACKDIR,  TRACKDIR_RIGHT_S, INVALID_TRACKDIR,  INVALID_TRACKDIR, INVALID_TRACKDIR}

    85

};

    86

    87

const Trackdir _dir_to_diag_trackdir[] = {

    88

	TRACKDIR_DIAG1_NE, TRACKDIR_DIAG2_SE, TRACKDIR_DIAG1_SW, TRACKDIR_DIAG2_NW,

    89

};

    90

    91

const DiagDirection _reverse_diagdir[] = {

    92

	DIAGDIR_SW, DIAGDIR_NW, DIAGDIR_NE, DIAGDIR_SE

    93

};

    94

    95

const Trackdir _reverse_trackdir[] = {

    96

	TRACKDIR_DIAG1_SW, TRACKDIR_DIAG2_NW, TRACKDIR_UPPER_W, TRACKDIR_LOWER_W, TRACKDIR_LEFT_N, TRACKDIR_RIGHT_N, INVALID_TRACKDIR, INVALID_TRACKDIR,

    97

	TRACKDIR_DIAG1_NE, TRACKDIR_DIAG2_SE, TRACKDIR_UPPER_E, TRACKDIR_LOWER_E, TRACKDIR_LEFT_S, TRACKDIR_RIGHT_S

    98

};