Function FindSubsidyPassengerRoute

src/subsidy.cpp:236–261

* Tries to create a passenger subsidy between two towns. * @return True iff the subsidy was created. */

 * @return True iff the subsidy was created.
 */
bool FindSubsidyPassengerRoute()
{
	if (!Subsidy::CanAllocateItem()) return false;

	/* Pick a random TPE_PASSENGER type */
	uint32_t r = RandomRange(static_cast<uint>(CargoSpec::town_production_cargoes[TPE_PASSENGERS].size()));
	CargoType cargo_type = CargoSpec::town_production_cargoes[TPE_PASSENGERS][r]->Index();

	const Town *src = Town::GetRandom();
	if (src->cache.population < SUBSIDY_PAX_MIN_POPULATION ||
			src->GetPercentTransported(cargo_type) > SUBSIDY_MAX_PCT_TRANSPORTED) {
		return false;
	}

	const Town *dst = Town::GetRandom();
	if (dst->cache.population < SUBSIDY_PAX_MIN_POPULATION || src == dst) {
		return false;
	}

	if (DistanceManhattan(src->xy, dst->xy) > SUBSIDY_MAX_DISTANCE) return false;
	if (CheckSubsidyDuplicate(cargo_type, {src->index, SourceType::Town}, {dst->index, SourceType::Town})) return false;

	CreateSubsidy(cargo_type, {src->index, SourceType::Town}, {dst->index, SourceType::Town});

	return true;
}

bool FindSubsidyCargoDestination(CargoType cargo_type, Source src);