Function TownGenerateCargoBinomial

src/town_cmd.cpp:579–594

* Generate cargo for a house using the binomial algorithm. * @param t The current town. * @param tpe The town production effect. * @param rate The town's product rate for this production. * @param stations Available stations for this house. */

 * @param stations Available stations for this house.
 */
static void TownGenerateCargoBinomial(Town *t, TownProductionEffect tpe, uint8_t rate, StationFinder &stations)
{
	for (const CargoSpec *cs : CargoSpec::town_production_cargoes[tpe]) {
		CargoType cargo_type = cs->Index();
		uint32_t r = Random();

		/* Make a bitmask with up to 32 bits set, one for each potential pax. */
		int genmax = (rate + 7) / 8;
		uint32_t genmask = (genmax >= 32) ? 0xFFFFFFFF : ((1 << genmax) - 1);

		/* Mask random value by potential pax and count number of actual pax. */
		uint amt = CountBits(r & genmask) * cs->town_production_multiplier / TOWN_PRODUCTION_DIVISOR;

		TownGenerateCargo(t, cargo_type, amt, stations, true);
	}
}

/**
 * Tile callback function.