Method UpdateLoadingTile

src/cargopacket.h:111–127

* Update for the cargo being loaded on this tile. * * When a CargoPacket is created, it is moved to a station. But at that * moment in time it is not known yet at which tile the cargo will be * picked up. As this tile is used for payment information, we delay * setting the source_xy till first pickup, getting a better idea where * a cargo started from. * * Further more, we keep tra

	 * @param tile Tile the cargo is being picked up from.
	 */
	void UpdateLoadingTile(TileIndex tile)
	{
		if (this->source_xy == INVALID_TILE) {
			this->source_xy = tile;
		}

#ifdef WITH_ASSERT
		assert(!this->in_vehicle);
		this->in_vehicle = true;
#endif /* WITH_ASSERT */

		/* We want to calculate the vector from tile-unload to tile-load. As
		 * we currently only know the latter, add it. When we know where we unload,
		 * we subtract is, giving us our vector (unload - load). */
		this->travelled.x += TileX(tile);
		this->travelled.y += TileY(tile);
	}

	/**
	 * Update for the cargo being unloaded on this tile.