Function GetRailTileArea

src/newgrf_station.cpp:83–105

* Get the tile area of a rail station with trigger area type. * @param st The rail station or rail waypoint. * @param tile Origin tile. * @param ta Trigger area type. * @return The tile area. */

 * @return The tile area.
 */
TileArea GetRailTileArea(const BaseStation *st, TileIndex tile, TriggerArea ta)
{
	switch (ta) {
		default: NOT_REACHED();

		case TA_TILE:
			return {tile, 1, 1};

		case TA_PLATFORM: {
			TileIndex start, end;
			Axis axis = GetRailStationAxis(tile);
			TileIndexDiff delta = TileOffsByAxis(axis);

			for (end = tile; IsRailStationTile(end + delta) && IsCompatibleTrainStationTile(end + delta, tile); end += delta) { /* Nothing */ }
			for (start = tile; IsRailStationTile(start - delta) && IsCompatibleTrainStationTile(start - delta, tile); start -= delta) { /* Nothing */ }

			return TileArea(start, TileX(end) - TileX(start) + 1, TileY(end) - TileY(start) + 1);
		}

		case TA_WHOLE:
			return st->GetTileArea(Station::IsExpected(st) ? StationType::Rail : StationType::RailWaypoint);
	}
}


/**