Function CmdExpandTown

src/town_cmd.cpp:3257–3287

* Expand a town (scenario editor only). * @param flags Type of operation. * @param TownID Town ID to expand. * @param grow_amount Amount to grow, or 0 to grow a random size up to the current amount of houses. * @return Empty cost or an error. */

 * @return Empty cost or an error.
 */
CommandCost CmdExpandTown(DoCommandFlags flags, TownID town_id, uint32_t grow_amount, TownExpandModes modes)
{
	if (_game_mode != GM_EDITOR && _current_company != OWNER_DEITY) return CMD_ERROR;
	if (modes.None()) return CMD_ERROR;
	Town *t = Town::GetIfValid(town_id);
	if (t == nullptr) return CMD_ERROR;

	if (flags.Test(DoCommandFlag::Execute)) {
		/* The more houses, the faster we grow */
		if (grow_amount == 0) {
			uint amount = RandomRange(ClampTo<uint16_t>(t->cache.num_houses / 10)) + 3;
			t->cache.num_houses += amount;
			UpdateTownRadius(t);

			uint n = amount * 10;
			do GrowTown(t, modes); while (--n);

			t->cache.num_houses -= amount;
		} else {
			for (; grow_amount > 0; grow_amount--) {
				/* Try several times to grow, as we are really suppose to grow */
				for (uint i = 0; i < 25; i++) if (GrowTown(t, modes)) break;
			}
		}
		UpdateTownRadius(t);

		UpdateTownMaxPass(t);
	}

	return CommandCost();
}

/**
 * Delete a town (scenario editor or worldgen only).