Method SetClimateMask

src/town_gui.cpp:1452–1471

* Set climate mask for filtering buildings from current landscape. */

	 * Set climate mask for filtering buildings from current landscape.
	 */
	void SetClimateMask()
	{
		this->climate_mask = GetClimateMaskForLandscape();

		/* In some cases, not all 'classes' (house zones) have distinct houses, so we need to disable those.
		 * As we need to check all types, and this cannot change with the picker window open, pre-calculate it.
		 * This loop calls GetTypeName() instead of directly checking properties so that there is no discrepancy. */
		this->class_mask = 0;

		int num_classes = this->GetClassCount();
		for (int cls_id = 0; cls_id < num_classes; ++cls_id) {
			int num_types = this->GetTypeCount(cls_id);
			for (int id = 0; id < num_types; ++id) {
				if (this->GetTypeName(cls_id, id) != INVALID_STRING_ID) {
					SetBit(this->class_mask, cls_id);
					break;
				}
			}
		}
	}

	HouseZones climate_mask{};
	uint8_t class_mask = 0; ///< Mask of available 'classes'.