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@ -2631,6 +2631,28 @@ void ClearDockingTilesCheckingNeighbours(TileIndex tile)
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}
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}
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/**
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* Check if a dock tile can be docked from the given direction.
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* @param t Tile index of dock.
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* @param d DiagDirection adjacent to dock being tested.
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* @return True iff the dock can be docked from the given direction.
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*/
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bool IsValidDockingDirectionForDock(TileIndex t, DiagDirection d)
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{
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assert(IsDockTile(t));
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/** Bitmap of valid directions for each dock tile part. */
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static const uint8 _valid_docking_tile[] = {
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0, 0, 0, 0, // No docking against the slope part.
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1 << DIAGDIR_NE | 1 << DIAGDIR_SW, // Docking permitted at the end
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1 << DIAGDIR_NW | 1 << DIAGDIR_SE, // of the flat piers.
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};
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StationGfx gfx = GetStationGfx(t);
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assert(gfx < lengthof(_valid_docking_tile));
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return HasBit(_valid_docking_tile[gfx], d);
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}
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/**
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* Find the part of a dock that is land-based
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* @param t Dock tile to find land part of
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