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-rw-r--r--src/ship_cmd.cpp17
1 files changed, 14 insertions, 3 deletions
diff --git a/src/ship_cmd.cpp b/src/ship_cmd.cpp
index 23786c17d..c4441cb15 100644
--- a/src/ship_cmd.cpp
+++ b/src/ship_cmd.cpp
@@ -510,9 +510,20 @@ static Track ChooseShipTrack(Ship *v, TileIndex tile, DiagDirection enterdir, Tr
return track;
}
-static inline TrackBits GetAvailShipTracks(TileIndex tile, DiagDirection dir)
+/**
+ * Get the available water tracks on a tile for a ship entering a tile.
+ * @param tile The tile about to enter.
+ * @param dir The entry direction.
+ * @param trackdir The trackdir the ship has on the old tile.
+ * @return The available trackbits on the next tile.
+ */
+static inline TrackBits GetAvailShipTracks(TileIndex tile, DiagDirection dir, Trackdir trackdir)
{
- return GetTileShipTrackStatus(tile) & DiagdirReachesTracks(dir);
+ TrackBits tracks = GetTileShipTrackStatus(tile) & DiagdirReachesTracks(dir);
+
+ if (_settings_game.pf.forbid_90_deg) tracks &= ~TrackCrossesTracks(TrackdirToTrack(trackdir));
+
+ return tracks;
}
static const byte _ship_subcoord[4][6][3] = {
@@ -699,7 +710,7 @@ static void ShipController(Ship *v)
DiagDirection diagdir = DiagdirBetweenTiles(gp.old_tile, gp.new_tile);
assert(diagdir != INVALID_DIAGDIR);
- tracks = GetAvailShipTracks(gp.new_tile, diagdir);
+ tracks = GetAvailShipTracks(gp.new_tile, diagdir, v->GetVehicleTrackdir());
if (tracks == TRACK_BIT_NONE) goto reverse_direction;
/* Choose a direction, and continue if we find one */