Function CheckSubsidyDistance

src/subsidy.cpp:159–165

* Checks if the source and destination of a subsidy are inside the distance limit. * @param src Source of cargo. * @param dst Destination of cargo. * @return True if they are inside the distance limit. */

 * @return True if they are inside the distance limit.
 */
static bool CheckSubsidyDistance(Source src, Source dst)
{
	TileIndex tile_src = (src.type == SourceType::Town) ? Town::Get(src.ToTownID())->xy : Industry::Get(src.ToIndustryID())->location.tile;
	TileIndex tile_dst = (dst.type == SourceType::Town) ? Town::Get(dst.ToTownID())->xy : Industry::Get(dst.ToIndustryID())->location.tile;

	return (DistanceManhattan(tile_src, tile_dst) <= SUBSIDY_MAX_DISTANCE);
}

/**
 * Creates a subsidy with the given parameters.