Function ClearPathReservation

src/train_cmd.cpp:2378–2413

* Clear the reservation of \a tile that was just left by a wagon on \a track_dir. * @param v %Train owning the reservation. * @param tile Tile with reservation to clear. * @param track_dir Track direction to clear. */

 * @param track_dir Track direction to clear.
 */
static void ClearPathReservation(const Train *v, TileIndex tile, Trackdir track_dir)
{
	DiagDirection dir = TrackdirToExitdir(track_dir);

	if (IsTileType(tile, MP_TUNNELBRIDGE)) {
		/* Are we just leaving a tunnel/bridge? */
		if (GetTunnelBridgeDirection(tile) == ReverseDiagDir(dir)) {
			TileIndex end = GetOtherTunnelBridgeEnd(tile);

			if (TunnelBridgeIsFree(tile, end, v).Succeeded()) {
				/* Free the reservation only if no other train is on the tiles. */
				SetTunnelBridgeReservation(tile, false);
				SetTunnelBridgeReservation(end, false);

				if (_settings_client.gui.show_track_reservation) {
					if (IsBridge(tile)) {
						MarkBridgeDirty(tile);
					} else {
						MarkTileDirtyByTile(tile);
						MarkTileDirtyByTile(end);
					}
				}
			}
		}
	} else if (IsRailStationTile(tile)) {
		TileIndex new_tile = TileAddByDiagDir(tile, dir);
		/* If the new tile is not a further tile of the same station, we
		 * clear the reservation for the whole platform. */
		if (!IsCompatibleTrainStationTile(new_tile, tile)) {
			SetRailStationPlatformReservation(tile, ReverseDiagDir(dir), false);
		}
	} else {
		/* Any other tile */
		UnreserveRailTrack(tile, TrackdirToTrack(track_dir));
	}
}

/**
 * Free the reserved path in front of a vehicle.