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#include "rail.h"
/* Maps a trackdir to the bit that stores its status in the map arrays, in the
* direction along with the trackdir */
const byte _signal_along_trackdir[] = {
0x80, 0x80, 0x80, 0x20, 0x40, 0x10, 0, 0,
0x40, 0x40, 0x40, 0x10, 0x80, 0x20
};
/* Maps a trackdir to the bit that stores its status in the map arrays, in the
* direction against the trackdir */
const byte _signal_against_trackdir[] = {
0x40, 0x40, 0x40, 0x10, 0x80, 0x20, 0, 0,
0x80, 0x80, 0x80, 0x20, 0x40, 0x10
};
/* Maps a Track to the bits that store the status of the two signals that can
* be present on the given track */
const byte _signal_on_track[] = {
0xC0, 0xC0, 0xC0, 0x30, 0xC0, 0x30
};
/* Maps a diagonal direction to the all trackdirs that are connected to any
* track entering in this direction (including those making 90 degree turns)
*/
const TrackdirBits _exitdir_reaches_trackdirs[] = {
TRACKDIR_BIT_DIAG1_NE|TRACKDIR_BIT_LOWER_E|TRACKDIR_BIT_LEFT_N, /* DIAGDIR_NE */
TRACKDIR_BIT_DIAG2_SE|TRACKDIR_BIT_LEFT_S |TRACKDIR_BIT_UPPER_E, /* DIAGDIR_SE */
TRACKDIR_BIT_DIAG1_SW|TRACKDIR_BIT_UPPER_W|TRACKDIR_BIT_RIGHT_S, /* DIAGDIR_SW */
TRACKDIR_BIT_DIAG2_NW|TRACKDIR_BIT_RIGHT_N|TRACKDIR_BIT_LOWER_W /* DIAGDIR_NW */
};
/* TODO: Remove magic numbers from tables below just like
* _exitdir_reaches_trackdirs[] */
const Trackdir _next_trackdir[14] = {
0, 1, 3, 2, 5, 4, 0, 0,
8, 9, 11, 10, 13, 12
};
/* Maps a trackdir to all trackdirs that make 90 deg turns with it. */
const TrackdirBits _trackdir_crosses_trackdirs[] = {
0x0202, 0x0101, 0x3030, 0x3030, 0x0C0C, 0x0C0C, 0, 0,
0x0202, 0x0101, 0x3030, 0x3030, 0x0C0C, 0x0C0C
};
/* Maps a track to all tracks that make 90 deg turns with it. */
const TrackBits _track_crosses_tracks[] = {
0x2, /* Track 1 -> Track 2 */
0x1, /* Track 2 -> Track 1 */
0x30, /* Upper -> Left | Right */
0x30, /* Lower -> Left | Right */
0x0C, /* Left -> Upper | Lower */
0x0C, /* Right -> Upper | Lower */
};
/* Maps a trackdir to the (4-way) direction the tile is exited when following
* that trackdir */
const DiagDirection _trackdir_to_exitdir[] = {
0,1,0,1,2,1, 0,0,
2,3,3,2,3,0,
};
const Trackdir _track_exitdir_to_trackdir[][DIAGDIR_END] = {
{0, 0xff, 8, 0xff},
{0xff, 1, 0xff, 9},
{2, 0xff, 0xff, 10},
{0xff, 3, 11, 0xf},
{0xff, 0xff, 4, 12},
{13, 5, 0xff, 0xff}
};
const Trackdir _track_direction_to_trackdir[][DIR_END] = {
{0xff, 0, 0xff, 0xff, 0xff, 8, 0xff, 0xff},
{0xff, 0xff, 0xff, 1, 0xff, 0xff, 0xff, 9},
{0xff, 0xff, 2, 0xff, 0xff, 0xff, 10, 0xff},
{0xff, 0xff, 3, 0xff, 0xff, 0xff, 11, 0xff},
{12, 0xff, 0xff, 0xff, 4, 0xff, 0xff, 0xff},
{13, 0xff, 0xff, 0xff, 5, 0xff, 0xff, 0xff}
};
const Trackdir _dir_to_diag_trackdir[] = {
0, 1, 8, 9,
};
const DiagDirection _reverse_diagdir[] = {
2, 3, 0, 1
};
const Trackdir _reverse_trackdir[] = {
8, 9, 10, 11, 12, 13, 0xFF, 0xFF,
0, 1, 2, 3, 4, 5
};
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