Function TownActionFundBuildings

src/town_cmd.cpp:3552–3577

* Perform the "fund new buildings" town action. * @param t The town to fund buildings in. * @param flags Type of operation. * @return An empty cost. */

 * @return An empty cost.
 */
static CommandCost TownActionFundBuildings(Town *t, DoCommandFlags flags)
{
	/* Check if it's allowed to buy the rights */
	if (!_settings_game.economy.fund_buildings) return CMD_ERROR;

	if (flags.Test(DoCommandFlag::Execute)) {
		/* And grow for 3 months */
		t->fund_buildings_months = 3;

		/* Enable growth (also checking GameScript's opinion) */
		UpdateTownGrowth(t);

		/* Build a new house, but add a small delay to make sure
		 * that spamming funding doesn't let town grow any faster
		 * than 1 house per 2 * TOWN_GROWTH_TICKS ticks.
		 * Also emulate original behaviour when town was only growing in
		 * TOWN_GROWTH_TICKS intervals, to make sure that it's not too
		 * tick-perfect and gives player some time window where they can
		 * spam funding with the exact same efficiency.
		 */
		t->grow_counter = std::min<uint16_t>(t->grow_counter, 2 * Ticks::TOWN_GROWTH_TICKS - (t->growth_rate - t->grow_counter) % Ticks::TOWN_GROWTH_TICKS);

		SetWindowDirty(WC_TOWN_VIEW, t->index);
	}
	return CommandCost();
}

/**
 * Perform the "buy exclusive transport rights" town action.