Method GetVariable

src/newgrf_railtype.cpp:28–70

virtual */

}

/* virtual */ uint32_t RailTypeScopeResolver::GetVariable(uint8_t variable, [[maybe_unused]] uint32_t parameter, bool &available) const
{
	if (this->tile == INVALID_TILE) {
		switch (variable) {
			case 0x40: return 0;
			case 0x41: return 0;
			case 0x42: return 0;
			case 0x43: return TimerGameCalendar::date.base();
			case 0x44: return to_underlying(HouseZone::TownEdge);
			case 0x45: {
				RailType rt = this->rti->Index();
				uint8_t local = GetReverseRailTypeTranslation(rt, this->ro.grffile);
				if (local == 0xFF) local = 0xFE;
				return 0xFFFF | local << 16;
			}
		}
	}

	switch (variable) {
		case 0x40: return GetTerrainType(this->tile, this->context);
		case 0x41: return 0;
		case 0x42: return IsLevelCrossingTile(this->tile) && IsCrossingBarred(this->tile);
		case 0x43:
			if (IsRailDepotTile(this->tile)) return Depot::GetByTile(this->tile)->build_date.base();
			return TimerGameCalendar::date.base();
		case 0x44: {
			const Town *t = nullptr;
			if (IsRailDepotTile(this->tile)) {
				t = Depot::GetByTile(this->tile)->town;
			} else if (IsLevelCrossingTile(this->tile)) {
				t = ClosestTownFromTile(this->tile, UINT_MAX);
			}
			return to_underlying(t != nullptr ? GetTownRadiusGroup(t, this->tile) : HouseZone::TownEdge);
		}
		case 0x45:
			return GetTrackTypes(this->tile, ro.grffile);
	}

	Debug(grf, 1, "Unhandled rail type tile variable 0x{:X}", variable);

	available = false;
	return UINT_MAX;
}

GrfSpecFeature RailTypeResolverObject::GetFeature() const
{