mirror of
https://github.com/JGRennison/OpenTTD-patches.git
synced 2024-11-04 06:00:15 +00:00
145 lines
6.7 KiB
C
145 lines
6.7 KiB
C
#include "stdafx.h"
|
|
#include "openttd.h"
|
|
#include "rail.h"
|
|
#include "station.h"
|
|
|
|
/* XXX: Below 3 tables store duplicate data. Maybe remove some? */
|
|
/* 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 */
|
|
};
|
|
|
|
const Trackdir _next_trackdir[] = {
|
|
TRACKDIR_DIAG1_NE, TRACKDIR_DIAG2_SE, TRACKDIR_LOWER_E, TRACKDIR_UPPER_E, TRACKDIR_RIGHT_S, TRACKDIR_LEFT_S, INVALID_TRACKDIR, INVALID_TRACKDIR,
|
|
TRACKDIR_DIAG1_SW, TRACKDIR_DIAG2_NW, TRACKDIR_LOWER_W, TRACKDIR_UPPER_W, TRACKDIR_RIGHT_N, TRACKDIR_LEFT_N
|
|
};
|
|
|
|
/* Maps a trackdir to all trackdirs that make 90 deg turns with it. */
|
|
const TrackdirBits _track_crosses_trackdirs[] = {
|
|
TRACKDIR_BIT_DIAG2_SE | TRACKDIR_BIT_DIAG2_NW, /* TRACK_DIAG1 */
|
|
TRACKDIR_BIT_DIAG1_NE | TRACKDIR_BIT_DIAG1_SW, /* TRACK_DIAG2 */
|
|
TRACKDIR_BIT_RIGHT_N | TRACKDIR_BIT_RIGHT_S | TRACKDIR_BIT_LEFT_N | TRACKDIR_BIT_LEFT_S, /* TRACK_UPPER */
|
|
TRACKDIR_BIT_RIGHT_N | TRACKDIR_BIT_RIGHT_S | TRACKDIR_BIT_LEFT_N | TRACKDIR_BIT_LEFT_S, /* TRACK_LOWER */
|
|
TRACKDIR_BIT_UPPER_W | TRACKDIR_BIT_UPPER_E | TRACKDIR_BIT_LOWER_W | TRACKDIR_BIT_LOWER_E, /* TRACK_LEFT */
|
|
TRACKDIR_BIT_UPPER_W | TRACKDIR_BIT_UPPER_E | TRACKDIR_BIT_LOWER_W | TRACKDIR_BIT_LOWER_E /* TRACK_RIGHT */
|
|
};
|
|
|
|
/* Maps a track to all tracks that make 90 deg turns with it. */
|
|
const TrackBits _track_crosses_tracks[] = {
|
|
TRACK_BIT_DIAG2, /* TRACK_DIAG1 */
|
|
TRACK_BIT_DIAG1, /* TRACK_DIAG2 */
|
|
TRACK_BIT_LEFT | TRACK_BIT_RIGHT, /* TRACK_UPPER */
|
|
TRACK_BIT_LEFT | TRACK_BIT_RIGHT, /* TRACK_LOWER */
|
|
TRACK_BIT_UPPER | TRACK_BIT_LOWER, /* TRACK_LEFT */
|
|
TRACK_BIT_UPPER | TRACK_BIT_LOWER /* TRACK_RIGHT */
|
|
};
|
|
|
|
/* Maps a trackdir to the (4-way) direction the tile is exited when following
|
|
* that trackdir */
|
|
const DiagDirection _trackdir_to_exitdir[] = {
|
|
DIAGDIR_NE,DIAGDIR_SE,DIAGDIR_NE,DIAGDIR_SE,DIAGDIR_SW,DIAGDIR_SE, DIAGDIR_NE,DIAGDIR_NE,
|
|
DIAGDIR_SW,DIAGDIR_NW,DIAGDIR_NW,DIAGDIR_SW,DIAGDIR_NW,DIAGDIR_NE,
|
|
};
|
|
|
|
const Trackdir _track_exitdir_to_trackdir[][DIAGDIR_END] = {
|
|
{TRACKDIR_DIAG1_NE, INVALID_TRACKDIR, TRACKDIR_DIAG1_SW, INVALID_TRACKDIR},
|
|
{INVALID_TRACKDIR, TRACKDIR_DIAG2_SE, INVALID_TRACKDIR, TRACKDIR_DIAG2_NW},
|
|
{TRACKDIR_UPPER_E, INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_UPPER_W},
|
|
{INVALID_TRACKDIR, TRACKDIR_LOWER_E, TRACKDIR_LOWER_W, INVALID_TRACKDIR},
|
|
{INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_LEFT_S, TRACKDIR_LEFT_N},
|
|
{TRACKDIR_RIGHT_N, TRACKDIR_RIGHT_S, INVALID_TRACKDIR, INVALID_TRACKDIR}
|
|
};
|
|
|
|
const Trackdir _track_enterdir_to_trackdir[][DIAGDIR_END] = { // TODO: replace magic with enums
|
|
{TRACKDIR_DIAG1_NE, INVALID_TRACKDIR, TRACKDIR_DIAG1_SW, INVALID_TRACKDIR},
|
|
{INVALID_TRACKDIR, TRACKDIR_DIAG2_SE, INVALID_TRACKDIR, TRACKDIR_DIAG2_NW},
|
|
{INVALID_TRACKDIR, TRACKDIR_UPPER_E, TRACKDIR_UPPER_W, INVALID_TRACKDIR},
|
|
{TRACKDIR_LOWER_E, INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_LOWER_W},
|
|
{TRACKDIR_LEFT_N, TRACKDIR_LEFT_S, INVALID_TRACKDIR, INVALID_TRACKDIR},
|
|
{INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_RIGHT_S, TRACKDIR_RIGHT_N}
|
|
};
|
|
|
|
const Trackdir _track_direction_to_trackdir[][DIR_END] = {
|
|
{INVALID_TRACKDIR, TRACKDIR_DIAG1_NE, INVALID_TRACKDIR, INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_DIAG1_SW, INVALID_TRACKDIR, INVALID_TRACKDIR},
|
|
{INVALID_TRACKDIR, INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_DIAG2_SE, INVALID_TRACKDIR, INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_DIAG2_NW},
|
|
{INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_UPPER_E, INVALID_TRACKDIR, INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_UPPER_W, INVALID_TRACKDIR},
|
|
{INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_LOWER_E, INVALID_TRACKDIR, INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_LOWER_W, INVALID_TRACKDIR},
|
|
{TRACKDIR_LEFT_N, INVALID_TRACKDIR, INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_LEFT_S, INVALID_TRACKDIR, INVALID_TRACKDIR, INVALID_TRACKDIR},
|
|
{TRACKDIR_RIGHT_N, INVALID_TRACKDIR, INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_RIGHT_S, INVALID_TRACKDIR, INVALID_TRACKDIR, INVALID_TRACKDIR}
|
|
};
|
|
|
|
const Trackdir _dir_to_diag_trackdir[] = {
|
|
TRACKDIR_DIAG1_NE, TRACKDIR_DIAG2_SE, TRACKDIR_DIAG1_SW, TRACKDIR_DIAG2_NW,
|
|
};
|
|
|
|
const DiagDirection _reverse_diagdir[] = {
|
|
DIAGDIR_SW, DIAGDIR_NW, DIAGDIR_NE, DIAGDIR_SE
|
|
};
|
|
|
|
const Trackdir _reverse_trackdir[] = {
|
|
TRACKDIR_DIAG1_SW, TRACKDIR_DIAG2_NW, TRACKDIR_UPPER_W, TRACKDIR_LOWER_W, TRACKDIR_LEFT_N, TRACKDIR_RIGHT_N, INVALID_TRACKDIR, INVALID_TRACKDIR,
|
|
TRACKDIR_DIAG1_NE, TRACKDIR_DIAG2_SE, TRACKDIR_UPPER_E, TRACKDIR_LOWER_E, TRACKDIR_LEFT_S, TRACKDIR_RIGHT_S
|
|
};
|
|
|
|
RailType GetTileRailType(TileIndex tile, Trackdir trackdir)
|
|
{
|
|
RailType type = INVALID_RAILTYPE;
|
|
DiagDirection exitdir = TrackdirToExitdir(trackdir);
|
|
switch (GetTileType(tile)) {
|
|
case MP_RAILWAY:
|
|
/* railway track */
|
|
type = _m[tile].m3 & RAILTYPE_MASK;
|
|
break;
|
|
case MP_STREET:
|
|
/* rail/road crossing */
|
|
if (IsLevelCrossing(tile))
|
|
type = _m[tile].m4 & RAILTYPE_MASK;
|
|
break;
|
|
case MP_STATION:
|
|
if (IsTrainStationTile(tile))
|
|
type = _m[tile].m3 & RAILTYPE_MASK;
|
|
break;
|
|
case MP_TUNNELBRIDGE:
|
|
/* railway tunnel */
|
|
if ((_m[tile].m5 & 0xFC) == 0) type = _m[tile].m3 & RAILTYPE_MASK;
|
|
/* railway bridge ending */
|
|
if ((_m[tile].m5 & 0xC6) == 0x80) type = _m[tile].m3 & RAILTYPE_MASK;
|
|
/* on railway bridge */
|
|
if ((_m[tile].m5 & 0xC6) == 0xC0 && ((DiagDirection)(_m[tile].m5 & 0x1)) == (exitdir & 0x1))
|
|
type = (_m[tile].m3 >> 4) & RAILTYPE_MASK;
|
|
/* under bridge (any type) */
|
|
if ((_m[tile].m5 & 0xC0) == 0xC0 && (_m[tile].m5 & 0x1U) != (exitdir & 0x1))
|
|
type = _m[tile].m3 & RAILTYPE_MASK;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return type;
|
|
}
|
|
|