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-rw-r--r--station_map.h19
1 files changed, 19 insertions, 0 deletions
diff --git a/station_map.h b/station_map.h
index 9ebf7803f..9c608af9b 100644
--- a/station_map.h
+++ b/station_map.h
@@ -184,6 +184,25 @@ static inline DiagDirection GetDockDirection(TileIndex t)
return (DiagDirection)(_m[t].m5 - DOCK_BASE);
}
+static inline TileIndexDiffC GetDockOffset(TileIndex t)
+{
+ static const TileIndexDiffC buoy_offset = {0, 0};
+ static const TileIndexDiffC oilrig_offset = {2, 0};
+ static const TileIndexDiffC dock_offset[DIAGDIR_END] = {
+ {-2, 0},
+ { 0, 2},
+ { 2, 0},
+ { 0, -2},
+ };
+ assert(IsTileType(t, MP_STATION));
+
+ if (IsBuoy_(t)) return buoy_offset;
+ if (IsOilRig(t)) return oilrig_offset;
+
+ assert(IsDock(t));
+
+ return dock_offset[GetDockDirection(t)];
+}
static inline bool IsCustomStationSprite(TileIndex t)
{