diff options
Diffstat (limited to 'src/track_func.h')
| -rw-r--r-- | src/track_func.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/src/track_func.h b/src/track_func.h index 68de827ef..5e1585c08 100644 --- a/src/track_func.h +++ b/src/track_func.h @@ -692,4 +692,25 @@ static inline bool IsUphillTrackdir(Slope slope, Trackdir dir) return HasBit(_uphill_trackdirs[RemoveHalftileSlope(slope)], dir); } +/** + * Determine the side in which the vehicle will leave the tile + * + * @param direction vehicle direction + * @param track vehicle track bits + * @return side of tile the vehicle will leave + */ +static inline DiagDirection VehicleExitDir(Direction direction, TrackBits track) +{ + static const TrackBits state_dir_table[DIAGDIR_END] = { TRACK_BIT_RIGHT, TRACK_BIT_LOWER, TRACK_BIT_LEFT, TRACK_BIT_UPPER }; + + DiagDirection diagdir = DirToDiagDir(direction); + + /* Determine the diagonal direction in which we will exit this tile */ + if (!HasBit(direction, 0) && track != state_dir_table[diagdir]) { + diagdir = ChangeDiagDir(diagdir, DIAGDIRDIFF_90LEFT); + } + + return diagdir; +} + #endif /* TRACK_FUNC_H */ |