Function ChopLumberMillTrees

src/industry_cmd.cpp:1113–1141

* Perform a circular search around the Lumber Mill in order to find trees to cut * @param i industry */

 * @param i industry
 */
static void ChopLumberMillTrees(Industry *i)
{
	/* Don't process lumber mill if cargo is not set up correctly. */
	auto itp = std::begin(i->produced);
	if (itp == std::end(i->produced) || !IsValidCargoType(itp->cargo)) return;

	/* We only want to cut trees if all tiles are completed. */
	for (TileIndex tile_cur : i->location) {
		if (i->TileBelongsToIndustry(tile_cur)) {
			if (!IsIndustryCompleted(tile_cur)) return;
		}
	}

	for (auto tile : SpiralTileSequence(i->location.tile, 40)) { // 40x40 tiles  to search.
		if (!IsTileType(tile, MP_TREES) || GetTreeGrowth(tile) < TreeGrowthStage::Grown) continue;

		/* found a tree */
		_industry_sound_ctr = 1;
		_industry_sound_tile = tile;
		if (_settings_client.sound.ambient) SndPlayTileFx(SND_38_LUMBER_MILL_1, tile);

		AutoRestoreBackup<CompanyID> cur_company(_current_company, OWNER_NONE);
		Command<CMD_LANDSCAPE_CLEAR>::Do(DoCommandFlag::Execute, tile);

		/* Add according value to waiting cargo. */
		itp->waiting = ClampTo<uint16_t>(itp->waiting + ScaleByCargoScale(45, false));
		break;
	}
}

/**
 * Helper for ProduceIndustryGoods that scales and produces cargos.