Function ClearDockingTilesCheckingNeighbours

src/station_cmd.cpp:3001–3015

* Clear docking tile status from tiles around a removed dock, if the tile has * no neighbours which would keep it as a docking tile. * @param tile Ex-dock tile to check. */

 * @param tile Ex-dock tile to check.
 */
void ClearDockingTilesCheckingNeighbours(TileIndex tile)
{
	assert(IsValidTile(tile));

	/* Clear and maybe re-set docking tile */
	for (DiagDirection d = DIAGDIR_BEGIN; d != DIAGDIR_END; d++) {
		TileIndex docking_tile = tile + TileOffsByDiagDir(d);
		if (!IsValidTile(docking_tile)) continue;

		if (IsPossibleDockingTile(docking_tile)) {
			SetDockingTile(docking_tile, false);
			CheckForDockingTile(docking_tile);
		}
	}
}

/**
 * Find the part of a dock that is land-based